diff options
Diffstat (limited to 'drivers/s390')
75 files changed, 4950 insertions, 2971 deletions
diff --git a/drivers/s390/block/Makefile b/drivers/s390/block/Makefile index be9f22d..0a89e08 100644 --- a/drivers/s390/block/Makefile +++ b/drivers/s390/block/Makefile @@ -2,8 +2,8 @@ # S/390 block devices # -dasd_eckd_mod-objs := dasd_eckd.o dasd_3990_erp.o dasd_9343_erp.o -dasd_fba_mod-objs := dasd_fba.o dasd_3370_erp.o dasd_9336_erp.o +dasd_eckd_mod-objs := dasd_eckd.o dasd_3990_erp.o dasd_alias.o +dasd_fba_mod-objs := dasd_fba.o dasd_diag_mod-objs := dasd_diag.o dasd_mod-objs := dasd.o dasd_ioctl.o dasd_proc.o dasd_devmap.o \ dasd_genhd.o dasd_erp.o diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index e6bfce6..d640427 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -48,13 +48,15 @@ MODULE_LICENSE("GPL"); /* * SECTION: prototypes for static functions of dasd.c */ -static int dasd_alloc_queue(struct dasd_device * device); -static void dasd_setup_queue(struct dasd_device * device); -static void dasd_free_queue(struct dasd_device * device); -static void dasd_flush_request_queue(struct dasd_device *); -static int dasd_flush_ccw_queue(struct dasd_device *, int); -static void dasd_tasklet(struct dasd_device *); +static int dasd_alloc_queue(struct dasd_block *); +static void dasd_setup_queue(struct dasd_block *); +static void dasd_free_queue(struct dasd_block *); +static void dasd_flush_request_queue(struct dasd_block *); +static int dasd_flush_block_queue(struct dasd_block *); +static void dasd_device_tasklet(struct dasd_device *); +static void dasd_block_tasklet(struct dasd_block *); static void do_kick_device(struct work_struct *); +static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *); /* * SECTION: Operations on the device structure. @@ -65,26 +67,23 @@ static wait_queue_head_t dasd_flush_wq; /* * Allocate memory for a new device structure. */ -struct dasd_device * -dasd_alloc_device(void) +struct dasd_device *dasd_alloc_device(void) { struct dasd_device *device; - device = kzalloc(sizeof (struct dasd_device), GFP_ATOMIC); - if (device == NULL) + device = kzalloc(sizeof(struct dasd_device), GFP_ATOMIC); + if (!device) return ERR_PTR(-ENOMEM); - /* open_count = 0 means device online but not in use */ - atomic_set(&device->open_count, -1); /* Get two pages for normal block device operations. */ device->ccw_mem = (void *) __get_free_pages(GFP_ATOMIC | GFP_DMA, 1); - if (device->ccw_mem == NULL) { + if (!device->ccw_mem) { kfree(device); return ERR_PTR(-ENOMEM); } /* Get one page for error recovery. */ device->erp_mem = (void *) get_zeroed_page(GFP_ATOMIC | GFP_DMA); - if (device->erp_mem == NULL) { + if (!device->erp_mem) { free_pages((unsigned long) device->ccw_mem, 1); kfree(device); return ERR_PTR(-ENOMEM); @@ -93,10 +92,9 @@ dasd_alloc_device(void) dasd_init_chunklist(&device->ccw_chunks, device->ccw_mem, PAGE_SIZE*2); dasd_init_chunklist(&device->erp_chunks, device->erp_mem, PAGE_SIZE); spin_lock_init(&device->mem_lock); - spin_lock_init(&device->request_queue_lock); - atomic_set (&device->tasklet_scheduled, 0); + atomic_set(&device->tasklet_scheduled, 0); tasklet_init(&device->tasklet, - (void (*)(unsigned long)) dasd_tasklet, + (void (*)(unsigned long)) dasd_device_tasklet, (unsigned long) device); INIT_LIST_HEAD(&device->ccw_queue); init_timer(&device->timer); @@ -110,8 +108,7 @@ dasd_alloc_device(void) /* * Free memory of a device structure. */ -void -dasd_free_device(struct dasd_device *device) +void dasd_free_device(struct dasd_device *device) { kfree(device->private); free_page((unsigned long) device->erp_mem); @@ -120,10 +117,42 @@ dasd_free_device(struct dasd_device *device) } /* + * Allocate memory for a new device structure. + */ +struct dasd_block *dasd_alloc_block(void) +{ + struct dasd_block *block; + + block = kzalloc(sizeof(*block), GFP_ATOMIC); + if (!block) + return ERR_PTR(-ENOMEM); + /* open_count = 0 means device online but not in use */ + atomic_set(&block->open_count, -1); + + spin_lock_init(&block->request_queue_lock); + atomic_set(&block->tasklet_scheduled, 0); + tasklet_init(&block->tasklet, + (void (*)(unsigned long)) dasd_block_tasklet, + (unsigned long) block); + INIT_LIST_HEAD(&block->ccw_queue); + spin_lock_init(&block->queue_lock); + init_timer(&block->timer); + + return block; +} + +/* + * Free memory of a device structure. + */ +void dasd_free_block(struct dasd_block *block) +{ + kfree(block); +} + +/* * Make a new device known to the system. */ -static int -dasd_state_new_to_known(struct dasd_device *device) +static int dasd_state_new_to_known(struct dasd_device *device) { int rc; @@ -133,12 +162,13 @@ dasd_state_new_to_known(struct dasd_device *device) */ dasd_get_device(device); - rc = dasd_alloc_queue(device); - if (rc) { - dasd_put_device(device); - return rc; + if (device->block) { + rc = dasd_alloc_queue(device->block); + if (rc) { + dasd_put_device(device); + return rc; + } } - device->state = DASD_STATE_KNOWN; return 0; } @@ -146,21 +176,24 @@ dasd_state_new_to_known(struct dasd_device *device) /* * Let the system forget about a device. */ -static int -dasd_state_known_to_new(struct dasd_device * device) +static int dasd_state_known_to_new(struct dasd_device *device) { /* Disable extended error reporting for this device. */ dasd_eer_disable(device); /* Forget the discipline information. */ - if (device->discipline) + if (device->discipline) { + if (device->discipline->uncheck_device) + device->discipline->uncheck_device(device); module_put(device->discipline->owner); + } device->discipline = NULL; if (device->base_discipline) module_put(device->base_discipline->owner); device->base_discipline = NULL; device->state = DASD_STATE_NEW; - dasd_free_queue(device); + if (device->block) + dasd_free_queue(device->block); /* Give up reference we took in dasd_state_new_to_known. */ dasd_put_device(device); @@ -170,19 +203,19 @@ dasd_state_known_to_new(struct dasd_device * device) /* * Request the irq line for the device. */ -static int -dasd_state_known_to_basic(struct dasd_device * device) +static int dasd_state_known_to_basic(struct dasd_device *device) { int rc; /* Allocate and register gendisk structure. */ - rc = dasd_gendisk_alloc(device); - if (rc) - return rc; - + if (device->block) { + rc = dasd_gendisk_alloc(device->block); + if (rc) + return rc; + } /* register 'device' debug area, used for all DBF_DEV_XXX calls */ - device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 2, - 8 * sizeof (long)); + device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 1, + 8 * sizeof(long)); debug_register_view(device->debug_area, &debug_sprintf_view); debug_set_level(device->debug_area, DBF_WARNING); DBF_DEV_EVENT(DBF_EMERG, device, "%s", "debug area created"); @@ -194,16 +227,17 @@ dasd_state_known_to_basic(struct dasd_device * device) /* * Release the irq line for the device. Terminate any running i/o. */ -static int -dasd_state_basic_to_known(struct dasd_device * device) +static int dasd_state_basic_to_known(struct dasd_device *device) { int rc; - - dasd_gendisk_free(device); - rc = dasd_flush_ccw_queue(device, 1); + if (device->block) { + dasd_gendisk_free(device->block); + dasd_block_clear_timer(device->block); + } + rc = dasd_flush_device_queue(device); if (rc) return rc; - dasd_clear_timer(device); + dasd_device_clear_timer(device); DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device); if (device->debug_area != NULL) { @@ -228,26 +262,32 @@ dasd_state_basic_to_known(struct dasd_device * device) * In case the analysis returns an error, the device setup is stopped * (a fake disk was already added to allow formatting). */ -static int -dasd_state_basic_to_ready(struct dasd_device * device) +static int dasd_state_basic_to_ready(struct dasd_device *device) { int rc; + struct dasd_block *block; rc = 0; - if (device->discipline->do_analysis != NULL) - rc = device->discipline->do_analysis(device); - if (rc) { - if (rc != -EAGAIN) - device->state = DASD_STATE_UNFMT; - return rc; - } + block = device->block; /* make disk known with correct capacity */ - dasd_setup_queue(device); - set_capacity(device->gdp, device->blocks << device->s2b_shift); - device->state = DASD_STATE_READY; - rc = dasd_scan_partitions(device); - if (rc) - device->state = DASD_STATE_BASIC; + if (block) { + if (block->base->discipline->do_analysis != NULL) + rc = block->base->discipline->do_analysis(block); + if (rc) { + if (rc != -EAGAIN) + device->state = DASD_STATE_UNFMT; + return rc; + } + dasd_setup_queue(block); + set_capacity(block->gdp, + block->blocks << block->s2b_shift); + device->state = DASD_STATE_READY; + rc = dasd_scan_partitions(block); + if (rc) + device->state = DASD_STATE_BASIC; + } else { + device->state = DASD_STATE_READY; + } return rc; } @@ -256,28 +296,31 @@ dasd_state_basic_to_ready(struct dasd_device * device) * Forget format information. Check if the target level is basic * and if it is create fake disk for formatting. */ -static int -dasd_state_ready_to_basic(struct dasd_device * device) +static int dasd_state_ready_to_basic(struct dasd_device *device) { int rc; - rc = dasd_flush_ccw_queue(device, 0); - if (rc) - return rc; - dasd_destroy_partitions(device); - dasd_flush_request_queue(device); - device->blocks = 0; - device->bp_block = 0; - device->s2b_shift = 0; device->state = DASD_STATE_BASIC; + if (device->block) { + struct dasd_block *block = device->block; + rc = dasd_flush_block_queue(block); + if (rc) { + device->state = DASD_STATE_READY; + return rc; + } + dasd_destroy_partitions(block); + dasd_flush_request_queue(block); + block->blocks = 0; + block->bp_block = 0; + block->s2b_shift = 0; + } return 0; } /* * Back to basic. */ -static int -dasd_state_unfmt_to_basic(struct dasd_device * device) +static int dasd_state_unfmt_to_basic(struct dasd_device *device) { device->state = DASD_STATE_BASIC; return 0; @@ -291,17 +334,31 @@ dasd_state_unfmt_to_basic(struct dasd_device * device) static int dasd_state_ready_to_online(struct dasd_device * device) { + int rc; + + if (device->discipline->ready_to_online) { + rc = device->discipline->ready_to_online(device); + if (rc) + return rc; + } device->state = DASD_STATE_ONLINE; - dasd_schedule_bh(device); + if (device->block) + dasd_schedule_block_bh(device->block); return 0; } /* * Stop the requeueing of requests again. */ -static int -dasd_state_online_to_ready(struct dasd_device * device) +static int dasd_state_online_to_ready(struct dasd_device *device) { + int rc; + + if (device->discipline->online_to_ready) { + rc = device->discipline->online_to_ready(device); + if (rc) + return rc; + } device->state = DASD_STATE_READY; return 0; } @@ -309,8 +366,7 @@ dasd_state_online_to_ready(struct dasd_device * device) /* * Device startup state changes. */ -static int -dasd_increase_state(struct dasd_device *device) +static int dasd_increase_state(struct dasd_device *device) { int rc; @@ -345,8 +401,7 @@ dasd_increase_state(struct dasd_device *device) /* * Device shutdown state changes. */ -static int -dasd_decrease_state(struct dasd_device *device) +static int dasd_decrease_state(struct dasd_device *device) { int rc; @@ -381,8 +436,7 @@ dasd_decrease_state(struct dasd_device *device) /* * This is the main startup/shutdown routine. */ -static void -dasd_change_state(struct dasd_device *device) +static void dasd_change_state(struct dasd_device *device) { int rc; @@ -409,17 +463,15 @@ dasd_change_state(struct dasd_device *device) * dasd_kick_device will schedule a call do do_kick_device to the kernel * event daemon. */ -static void -do_kick_device(struct work_struct *work) +static void do_kick_device(struct work_struct *work) { struct dasd_device *device = container_of(work, struct dasd_device, kick_work); dasd_change_state(device); - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); dasd_put_device(device); } -void -dasd_kick_device(struct dasd_device *device) +void dasd_kick_device(struct dasd_device *device) { dasd_get_device(device); /* queue call to dasd_kick_device to the kernel event daemon. */ @@ -429,8 +481,7 @@ dasd_kick_device(struct dasd_device *device) /* * Set the target state for a device and starts the state change. */ -void -dasd_set_target_state(struct dasd_device *device, int target) +void dasd_set_target_state(struct dasd_device *device, int target) { /* If we are in probeonly mode stop at DASD_STATE_READY. */ if (dasd_probeonly && target > DASD_STATE_READY) @@ -447,14 +498,12 @@ dasd_set_target_state(struct dasd_device *device, int target) /* * Enable devices with device numbers in [from..to]. */ -static inline int -_wait_for_device(struct dasd_device *device) +static inline int _wait_for_device(struct dasd_device *device) { return (device->state == device->target); } -void -dasd_enable_device(struct dasd_device *device) +void dasd_enable_device(struct dasd_device *device) { dasd_set_target_state(device, DASD_STATE_ONLINE); if (device->state <= DASD_STATE_KNOWN) @@ -475,20 +524,20 @@ unsigned int dasd_profile_level = DASD_PROFILE_OFF; /* * Increments counter in global and local profiling structures. */ -#define dasd_profile_counter(value, counter, device) \ +#define dasd_profile_counter(value, counter, block) \ { \ int index; \ for (index = 0; index < 31 && value >> (2+index); index++); \ dasd_global_profile.counter[index]++; \ - device->profile.counter[index]++; \ + block->profile.counter[index]++; \ } /* * Add profiling information for cqr before execution. */ -static void -dasd_profile_start(struct dasd_device *device, struct dasd_ccw_req * cqr, - struct request *req) +static void dasd_profile_start(struct dasd_block *block, + struct dasd_ccw_req *cqr, + struct request *req) { struct list_head *l; unsigned int counter; @@ -498,19 +547,19 @@ dasd_profile_start(struct dasd_device *device, struct dasd_ccw_req * cqr, /* count the length of the chanq for statistics */ counter = 0; - list_for_each(l, &device->ccw_queue) + list_for_each(l, &block->ccw_queue) if (++counter >= 31) break; dasd_global_profile.dasd_io_nr_req[counter]++; - device->profile.dasd_io_nr_req[counter]++; + block->profile.dasd_io_nr_req[counter]++; } /* * Add profiling information for cqr after execution. */ -static void -dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr, - struct request *req) +static void dasd_profile_end(struct dasd_block *block, + struct dasd_ccw_req *cqr, + struct request *req) { long strtime, irqtime, endtime, tottime; /* in microseconds */ long tottimeps, sectors; @@ -532,27 +581,27 @@ dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr, if (!dasd_global_profile.dasd_io_reqs) memset(&dasd_global_profile, 0, - sizeof (struct dasd_profile_info_t)); + sizeof(struct dasd_profile_info_t)); dasd_global_profile.dasd_io_reqs++; dasd_global_profile.dasd_io_sects += sectors; - if (!device->profile.dasd_io_reqs) - memset(&device->profile, 0, - sizeof (struct dasd_profile_info_t)); - device->profile.dasd_io_reqs++; - device->profile.dasd_io_sects += sectors; + if (!block->profile.dasd_io_reqs) + memset(&block->profile, 0, + sizeof(struct dasd_profile_info_t)); + block->profile.dasd_io_reqs++; + block->profile.dasd_io_sects += sectors; - dasd_profile_counter(sectors, dasd_io_secs, device); - dasd_profile_counter(tottime, dasd_io_times, device); - dasd_profile_counter(tottimeps, dasd_io_timps, device); - dasd_profile_counter(strtime, dasd_io_time1, device); - dasd_profile_counter(irqtime, dasd_io_time2, device); - dasd_profile_counter(irqtime / sectors, dasd_io_time2ps, device); - dasd_profile_counter(endtime, dasd_io_time3, device); + dasd_profile_counter(sectors, dasd_io_secs, block); + dasd_profile_counter(tottime, dasd_io_times, block); + dasd_profile_counter(tottimeps, dasd_io_timps, block); + dasd_profile_counter(strtime, dasd_io_time1, block); + dasd_profile_counter(irqtime, dasd_io_time2, block); + dasd_profile_counter(irqtime / sectors, dasd_io_time2ps, block); + dasd_profile_counter(endtime, dasd_io_time3, block); } #else -#define dasd_profile_start(device, cqr, req) do {} while (0) -#define dasd_profile_end(device, cqr, req) do {} while (0) +#define dasd_profile_start(block, cqr, req) do {} while (0) +#define dasd_profile_end(block, cqr, req) do {} while (0) #endif /* CONFIG_DASD_PROFILE */ /* @@ -562,9 +611,9 @@ dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr, * memory and 2) dasd_smalloc_request uses the static ccw memory * that gets allocated for each device. */ -struct dasd_ccw_req * -dasd_kmalloc_request(char *magic, int cplength, int datasize, - struct dasd_device * device) +struct dasd_ccw_req *dasd_kmalloc_request(char *magic, int cplength, + int datasize, + struct dasd_device *device) { struct dasd_ccw_req *cqr; @@ -600,9 +649,9 @@ dasd_kmalloc_request(char *magic, int cplength, int datasize, return cqr; } -struct dasd_ccw_req * -dasd_smalloc_request(char *magic, int cplength, int datasize, - struct dasd_device * device) +struct dasd_ccw_req *dasd_smalloc_request(char *magic, int cplength, + int datasize, + struct dasd_device *device) { unsigned long flags; struct dasd_ccw_req *cqr; @@ -649,8 +698,7 @@ dasd_smalloc_request(char *magic, int cplength, int datasize, * idal lists that might have been created by dasd_set_cda and the * struct dasd_ccw_req itself. */ -void -dasd_kfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device) +void dasd_kfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) { #ifdef CONFIG_64BIT struct ccw1 *ccw; @@ -667,8 +715,7 @@ dasd_kfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device) dasd_put_device(device); } -void -dasd_sfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device) +void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) { unsigned long flags; @@ -681,14 +728,13 @@ dasd_sfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device) /* * Check discipline magic in cqr. */ -static inline int -dasd_check_cqr(struct dasd_ccw_req *cqr) +static inline int dasd_check_cqr(struct dasd_ccw_req *cqr) { struct dasd_device *device; if (cqr == NULL) return -EINVAL; - device = cqr->device; + device = cqr->startdev; if (strncmp((char *) &cqr->magic, device->discipline->ebcname, 4)) { DEV_MESSAGE(KERN_WARNING, device, " dasd_ccw_req 0x%08x magic doesn't match" @@ -706,8 +752,7 @@ dasd_check_cqr(struct dasd_ccw_req *cqr) * ccw_device_clear can fail if the i/o subsystem * is in a bad mood. */ -int -dasd_term_IO(struct dasd_ccw_req * cqr) +int dasd_term_IO(struct dasd_ccw_req *cqr) { struct dasd_device *device; int retries, rc; @@ -717,13 +762,13 @@ dasd_term_IO(struct dasd_ccw_req * cqr) if (rc) return rc; retries = 0; - device = (struct dasd_device *) cqr->device; + device = (struct dasd_device *) cqr->startdev; while ((retries < 5) && (cqr->status == DASD_CQR_IN_IO)) { rc = ccw_device_clear(device->cdev, (long) cqr); switch (rc) { case 0: /* termination successful */ cqr->retries--; - cqr->status = DASD_CQR_CLEAR; + cqr->status = DASD_CQR_CLEAR_PENDING; cqr->stopclk = get_clock(); cqr->starttime = 0; DBF_DEV_EVENT(DBF_DEBUG, device, @@ -753,7 +798,7 @@ dasd_term_IO(struct dasd_ccw_req * cqr) } retries++; } - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); return rc; } @@ -761,8 +806,7 @@ dasd_term_IO(struct dasd_ccw_req * cqr) * Start the i/o. This start_IO can fail if the channel is really busy. * In that case set up a timer to start the request later. */ -int -dasd_start_IO(struct dasd_ccw_req * cqr) +int dasd_start_IO(struct dasd_ccw_req *cqr) { struct dasd_device *device; int rc; @@ -771,12 +815,12 @@ dasd_start_IO(struct dasd_ccw_req * cqr) rc = dasd_check_cqr(cqr); if (rc) return rc; - device = (struct dasd_device *) cqr->device; + device = (struct dasd_device *) cqr->startdev; if (cqr->retries < 0) { DEV_MESSAGE(KERN_DEBUG, device, "start_IO: request %p (%02x/%i) - no retry left.", cqr, cqr->status, cqr->retries); - cqr->status = DASD_CQR_FAILED; + cqr->status = DASD_CQR_ERROR; return -EIO; } cqr->startclk = get_clock(); @@ -833,8 +877,7 @@ dasd_start_IO(struct dasd_ccw_req * cqr) * The head of the ccw queue will have status DASD_CQR_IN_IO for 1), * DASD_CQR_QUEUED for 2) and 3). */ -static void -dasd_timeout_device(unsigned long ptr) +static void dasd_device_timeout(unsigned long ptr) { unsigned long flags; struct dasd_device *device; @@ -844,14 +887,13 @@ dasd_timeout_device(unsigned long ptr) /* re-activate request queue */ device->stopped &= ~DASD_STOPPED_PENDING; spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); } /* * Setup timeout for a device in jiffies. */ -void -dasd_set_timer(struct dasd_device *device, int expires) +void dasd_device_set_timer(struct dasd_device *device, int expires) { if (expires == 0) { if (timer_pending(&device->timer)) @@ -862,7 +904,7 @@ dasd_set_timer(struct dasd_device *device, int expires) if (mod_timer(&device->timer, jiffies + expires)) return; } - device->timer.function = dasd_timeout_device; + device->timer.function = dasd_device_timeout; device->timer.data = (unsigned long) device; device->timer.expires = jiffies + expires; add_timer(&device->timer); @@ -871,15 +913,14 @@ dasd_set_timer(struct dasd_device *device, int expires) /* * Clear timeout for a device. */ -void -dasd_clear_timer(struct dasd_device *device) +void dasd_device_clear_timer(struct dasd_device *device) { if (timer_pending(&device->timer)) del_timer(&device->timer); } -static void -dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm) +static void dasd_handle_killed_request(struct ccw_device *cdev, + unsigned long intparm) { struct dasd_ccw_req *cqr; struct dasd_device *device; @@ -893,7 +934,7 @@ dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm) return; } - device = (struct dasd_device *) cqr->device; + device = (struct dasd_device *) cqr->startdev; if (device == NULL || device != dasd_device_from_cdev_locked(cdev) || strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { @@ -905,46 +946,32 @@ dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm) /* Schedule request to be retried. */ cqr->status = DASD_CQR_QUEUED; - dasd_clear_timer(device); - dasd_schedule_bh(device); + dasd_device_clear_timer(device); + dasd_schedule_device_bh(device); dasd_put_device(device); } -static void -dasd_handle_state_change_pending(struct dasd_device *device) +void dasd_generic_handle_state_change(struct dasd_device *device) { - struct dasd_ccw_req *cqr; - struct list_head *l, *n; - /* First of all start sense subsystem status request. */ dasd_eer_snss(device); device->stopped &= ~DASD_STOPPED_PENDING; - - /* restart all 'running' IO on queue */ - list_for_each_safe(l, n, &device->ccw_queue) { - cqr = list_entry(l, struct dasd_ccw_req, list); - if (cqr->status == DASD_CQR_IN_IO) { - cqr->status = DASD_CQR_QUEUED; - } - } - dasd_clear_timer(device); - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); + if (device->block) + dasd_schedule_block_bh(device->block); } /* * Interrupt handler for "normal" ssch-io based dasd devices. */ -void -dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, - struct irb *irb) +void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, + struct irb *irb) { struct dasd_ccw_req *cqr, *next; struct dasd_device *device; unsigned long long now; int expires; - dasd_era_t era; - char mask; if (IS_ERR(irb)) { switch (PTR_ERR(irb)) { @@ -969,29 +996,25 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, cdev->dev.bus_id, ((irb->scsw.cstat<<8)|irb->scsw.dstat), (unsigned int) intparm); - /* first of all check for state change pending interrupt */ - mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; - if ((irb->scsw.dstat & mask) == mask) { + /* check for unsolicited interrupts */ + cqr = (struct dasd_ccw_req *) intparm; + if (!cqr || ((irb->scsw.cc == 1) && + (irb->scsw.fctl & SCSW_FCTL_START_FUNC) && + (irb->scsw.stctl & SCSW_STCTL_STATUS_PEND)) ) { + if (cqr && cqr->status == DASD_CQR_IN_IO) + cqr->status = DASD_CQR_QUEUED; device = dasd_device_from_cdev_locked(cdev); if (!IS_ERR(device)) { - dasd_handle_state_change_pending(device); + dasd_device_clear_timer(device); + device->discipline->handle_unsolicited_interrupt(device, + irb); dasd_put_device(device); } return; } - cqr = (struct dasd_ccw_req *) intparm; - - /* check for unsolicited interrupts */ - if (cqr == NULL) { - MESSAGE(KERN_DEBUG, - "unsolicited interrupt received: bus_id %s", - cdev->dev.bus_id); - return; - } - - device = (struct dasd_device *) cqr->device; - if (device == NULL || + device = (struct dasd_device *) cqr->startdev; + if (!device || strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s", cdev->dev.bus_id); @@ -999,12 +1022,12 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, } /* Check for clear pending */ - if (cqr->status == DASD_CQR_CLEAR && + if (cqr->status == DASD_CQR_CLEAR_PENDING && irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) { - cqr->status = DASD_CQR_QUEUED; - dasd_clear_timer(device); + cqr->status = DASD_CQR_CLEARED; + dasd_device_clear_timer(device); wake_up(&dasd_flush_wq); - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); return; } @@ -1017,277 +1040,170 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, } DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p", ((irb->scsw.cstat << 8) | irb->scsw.dstat), cqr); - - /* Find out the appropriate era_action. */ - if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) - era = dasd_era_fatal; - else if (irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) && - irb->scsw.cstat == 0 && - !irb->esw.esw0.erw.cons) - era = dasd_era_none; - else if (irb->esw.esw0.erw.cons) - era = device->discipline->examine_error(cqr, irb); - else - era = dasd_era_recover; - - DBF_DEV_EVENT(DBF_DEBUG, device, "era_code %d", era); + next = NULL; expires = 0; - if (era == dasd_era_none) { - cqr->status = DASD_CQR_DONE; + if (irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) && + irb->scsw.cstat == 0 && !irb->esw.esw0.erw.cons) { + /* request was completed successfully */ + cqr->status = DASD_CQR_SUCCESS; cqr->stopclk = now; /* Start first request on queue if possible -> fast_io. */ - if (cqr->list.next != &device->ccw_queue) { - next = list_entry(cqr->list.next, - struct dasd_ccw_req, list); - if ((next->status == DASD_CQR_QUEUED) && - (!device->stopped)) { - if (device->discipline->start_IO(next) == 0) - expires = next->expires; - else - DEV_MESSAGE(KERN_DEBUG, device, "%s", - "Interrupt fastpath " - "failed!"); - } + if (cqr->devlist.next != &device->ccw_queue) { + next = list_entry(cqr->devlist.next, + struct dasd_ccw_req, devlist); } - } else { /* error */ - memcpy(&cqr->irb, irb, sizeof (struct irb)); + } else { /* error */ + memcpy(&cqr->irb, irb, sizeof(struct irb)); if (device->features & DASD_FEATURE_ERPLOG) { - /* dump sense data */ dasd_log_sense(cqr, irb); } - switch (era) { - case dasd_era_fatal: - cqr->status = DASD_CQR_FAILED; - cqr->stopclk = now; - break; - case dasd_era_recover: + /* If we have no sense data, or we just don't want complex ERP + * for this request, but if we have retries left, then just + * reset this request and retry it in the fastpath + */ + if (!(cqr->irb.esw.esw0.erw.cons && + test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags)) && + cqr->retries > 0) { + DEV_MESSAGE(KERN_DEBUG, device, + "default ERP in fastpath (%i retries left)", + cqr->retries); + cqr->lpm = LPM_ANYPATH; + cqr->status = DASD_CQR_QUEUED; + next = cqr; + } else cqr->status = DASD_CQR_ERROR; - break; - default: - BUG(); - } + } + if (next && (next->status == DASD_CQR_QUEUED) && + (!device->stopped)) { + if (device->discipline->start_IO(next) == 0) + expires = next->expires; + else + DEV_MESSAGE(KERN_DEBUG, device, "%s", + "Interrupt fastpath " + "failed!"); } if (expires != 0) - dasd_set_timer(device, expires); + dasd_device_set_timer(device, expires); else - dasd_clear_timer(device); - dasd_schedule_bh(device); + dasd_device_clear_timer(device); + dasd_schedule_device_bh(device); } /* - * posts the buffer_cache about a finalized request + * If we have an error on a dasd_block layer request then we cancel + * and return all further requests from the same dasd_block as well. */ -static inline void -dasd_end_request(struct request *req, int uptodate) +static void __dasd_device_recovery(struct dasd_device *device, + struct dasd_ccw_req *ref_cqr) { - if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) - BUG(); - add_disk_randomness(req->rq_disk); - end_that_request_last(req, uptodate); -} + struct list_head *l, *n; + struct dasd_ccw_req *cqr; -/* - * Process finished error recovery ccw. - */ -static inline void -__dasd_process_erp(struct dasd_device *device, struct dasd_ccw_req *cqr) -{ - dasd_erp_fn_t erp_fn; + /* + * only requeue request that came from the dasd_block layer + */ + if (!ref_cqr->block) + return; - if (cqr->status == DASD_CQR_DONE) - DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful"); - else - DEV_MESSAGE(KERN_ERR, device, "%s", "ERP unsuccessful"); - erp_fn = device->discipline->erp_postaction(cqr); - erp_fn(cqr); -} + list_for_each_safe(l, n, &device->ccw_queue) { + cqr = list_entry(l, struct dasd_ccw_req, devlist); + if (cqr->status == DASD_CQR_QUEUED && + ref_cqr->block == cqr->block) { + cqr->status = DASD_CQR_CLEARED; + } + } +}; /* - * Process ccw request queue. + * Remove those ccw requests from the queue that need to be returned + * to the upper layer. */ -static void -__dasd_process_ccw_queue(struct dasd_device * device, - struct list_head *final_queue) +static void __dasd_device_process_ccw_queue(struct dasd_device *device, + struct list_head *final_queue) { struct list_head *l, *n; struct dasd_ccw_req *cqr; - dasd_erp_fn_t erp_fn; -restart: /* Process request with final status. */ list_for_each_safe(l, n, &device->ccw_queue) { - cqr = list_entry(l, struct dasd_ccw_req, list); + cqr = list_entry(l, struct dasd_ccw_req, devlist); + /* Stop list processing at the first non-final request. */ - if (cqr->status != DASD_CQR_DONE && - cqr->status != DASD_CQR_FAILED && - cqr->status != DASD_CQR_ERROR) + if (cqr->status == DASD_CQR_QUEUED || + cqr->status == DASD_CQR_IN_IO || + cqr->status == DASD_CQR_CLEAR_PENDING) break; - /* Process requests with DASD_CQR_ERROR */ if (cqr->status == DASD_CQR_ERROR) { - if (cqr->irb.scsw.fctl & SCSW_FCTL_HALT_FUNC) { - cqr->status = DASD_CQR_FAILED; - cqr->stopclk = get_clock(); - } else { - if (cqr->irb.esw.esw0.erw.cons && - test_bit(DASD_CQR_FLAGS_USE_ERP, - &cqr->flags)) { - erp_fn = device->discipline-> - erp_action(cqr); - erp_fn(cqr); - } else - dasd_default_erp_action(cqr); - } - goto restart; - } - - /* First of all call extended error reporting. */ - if (dasd_eer_enabled(device) && - cqr->status == DASD_CQR_FAILED) { - dasd_eer_write(device, cqr, DASD_EER_FATALERROR); - - /* restart request */ - cqr->status = DASD_CQR_QUEUED; - cqr->retries = 255; - device->stopped |= DASD_STOPPED_QUIESCE; - goto restart; + __dasd_device_recovery(device, cqr); } - - /* Process finished ERP request. */ - if (cqr->refers) { - __dasd_process_erp(device, cqr); - goto restart; - } - /* Rechain finished requests to final queue */ - cqr->endclk = get_clock(); - list_move_tail(&cqr->list, final_queue); + list_move_tail(&cqr->devlist, final_queue); } } -static void -dasd_end_request_cb(struct dasd_ccw_req * cqr, void *data) -{ - struct request *req; - struct dasd_device *device; - int status; - - req = (struct request *) data; - device = cqr->device; - dasd_profile_end(device, cqr, req); - status = cqr->device->discipline->free_cp(cqr,req); - spin_lock_irq(&device->request_queue_lock); - dasd_end_request(req, status); - spin_unlock_irq(&device->request_queue_lock); -} - - /* - * Fetch requests from the block device queue. + * the cqrs from the final queue are returned to the upper layer + * by setting a dasd_block state and calling the callback function */ -static void -__dasd_process_blk_queue(struct dasd_device * device) +static void __dasd_device_process_final_queue(struct dasd_device *device, + struct list_head *final_queue) { - struct request_queue *queue; - struct request *req; + struct list_head *l, *n; struct dasd_ccw_req *cqr; - int nr_queued; - - queue = device->request_queue; - /* No queue ? Then there is nothing to do. */ - if (queue == NULL) - return; - - /* - * We requeue request from the block device queue to the ccw - * queue only in two states. In state DASD_STATE_READY the - * partition detection is done and we need to requeue requests - * for that. State DASD_STATE_ONLINE is normal block device - * operation. - */ - if (device->state != DASD_STATE_READY && - device->state != DASD_STATE_ONLINE) - return; - nr_queued = 0; - /* Now we try to fetch requests from the request queue */ - list_for_each_entry(cqr, &device->ccw_queue, list) - if (cqr->status == DASD_CQR_QUEUED) - nr_queued++; - while (!blk_queue_plugged(queue) && - elv_next_request(queue) && - nr_queued < DASD_CHANQ_MAX_SIZE) { - req = elv_next_request(queue); - if (device->features & DASD_FEATURE_READONLY && - rq_data_dir(req) == WRITE) { - DBF_DEV_EVENT(DBF_ERR, device, - "Rejecting write request %p", - req); - blkdev_dequeue_request(req); - dasd_end_request(req, 0); - continue; - } - if (device->stopped & DASD_STOPPED_DC_EIO) { - blkdev_dequeue_request(req); - dasd_end_request(req, 0); - continue; - } - cqr = device->discipline->build_cp(device, req); - if (IS_ERR(cqr)) { - if (PTR_ERR(cqr) == -ENOMEM) - break; /* terminate request queue loop */ - if (PTR_ERR(cqr) == -EAGAIN) { - /* - * The current request cannot be build right - * now, we have to try later. If this request - * is the head-of-queue we stop the device - * for 1/2 second. - */ - if (!list_empty(&device->ccw_queue)) - break; - device->stopped |= DASD_STOPPED_PENDING; - dasd_set_timer(device, HZ/2); - break; - } - DBF_DEV_EVENT(DBF_ERR, device, - "CCW creation failed (rc=%ld) " - "on request %p", - PTR_ERR(cqr), req); - blkdev_dequeue_request(req); - dasd_end_request(req, 0); - continue; + list_for_each_safe(l, n, final_queue) { + cqr = list_entry(l, struct dasd_ccw_req, devlist); + list_del_init(&cqr->devlist); + if (cqr->block) + spin_lock_bh(&cqr->block->queue_lock); + switch (cqr->status) { + case DASD_CQR_SUCCESS: + cqr->status = DASD_CQR_DONE; + break; + case DASD_CQR_ERROR: + cqr->status = DASD_CQR_NEED_ERP; + break; + case DASD_CQR_CLEARED: + cqr->status = DASD_CQR_TERMINATED; + break; + default: + DEV_MESSAGE(KERN_ERR, device, + "wrong cqr status in __dasd_process_final_queue " + "for cqr %p, status %x", + cqr, cqr->status); + BUG(); } - cqr->callback = dasd_end_request_cb; - cqr->callback_data = (void *) req; - cqr->status = DASD_CQR_QUEUED; - blkdev_dequeue_request(req); - list_add_tail(&cqr->list, &device->ccw_queue); - dasd_profile_start(device, cqr, req); - nr_queued++; + if (cqr->block) + spin_unlock_bh(&cqr->block->queue_lock); + if (cqr->callback != NULL) + (cqr->callback)(cqr, cqr->callback_data); } } + + /* * Take a look at the first request on the ccw queue and check * if it reached its expire time. If so, terminate the IO. */ -static void -__dasd_check_expire(struct dasd_device * device) +static void __dasd_device_check_expire(struct dasd_device *device) { struct dasd_ccw_req *cqr; if (list_empty(&device->ccw_queue)) return; - cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); + cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) && (time_after_eq(jiffies, cqr->expires + cqr->starttime))) { if (device->discipline->term_IO(cqr) != 0) { /* Hmpf, try again in 5 sec */ - dasd_set_timer(device, 5*HZ); DEV_MESSAGE(KERN_ERR, device, "internal error - timeout (%is) expired " "for cqr %p, termination failed, " "retrying in 5s", (cqr->expires/HZ), cqr); + cqr->expires += 5*HZ; + dasd_device_set_timer(device, 5*HZ); } else { DEV_MESSAGE(KERN_ERR, device, "internal error - timeout (%is) expired " @@ -1301,77 +1217,53 @@ __dasd_check_expire(struct dasd_device * device) * Take a look at the first request on the ccw queue and check * if it needs to be started. */ -static void -__dasd_start_head(struct dasd_device * device) +static void __dasd_device_start_head(struct dasd_device *device) { struct dasd_ccw_req *cqr; int rc; if (list_empty(&device->ccw_queue)) return; - cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); + cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); if (cqr->status != DASD_CQR_QUEUED) return; - /* Non-temporary stop condition will trigger fail fast */ - if (device->stopped & ~DASD_STOPPED_PENDING && - test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && - (!dasd_eer_enabled(device))) { - cqr->status = DASD_CQR_FAILED; - dasd_schedule_bh(device); + /* when device is stopped, return request to previous layer */ + if (device->stopped) { + cqr->status = DASD_CQR_CLEARED; + dasd_schedule_device_bh(device); return; } - /* Don't try to start requests if device is stopped */ - if (device->stopped) - return; rc = device->discipline->start_IO(cqr); if (rc == 0) - dasd_set_timer(device, cqr->expires); + dasd_device_set_timer(device, cqr->expires); else if (rc == -EACCES) { - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); } else /* Hmpf, try again in 1/2 sec */ - dasd_set_timer(device, 50); -} - -static inline int -_wait_for_clear(struct dasd_ccw_req *cqr) -{ - return (cqr->status == DASD_CQR_QUEUED); + dasd_device_set_timer(device, 50); } /* - * Remove all requests from the ccw queue (all = '1') or only block device - * requests in case all = '0'. - * Take care of the erp-chain (chained via cqr->refers) and remove either - * the whole erp-chain or none of the erp-requests. - * If a request is currently running, term_IO is called and the request - * is re-queued. Prior to removing the terminated request we need to wait - * for the clear-interrupt. - * In case termination is not possible we stop processing and just finishing - * the already moved requests. + * Go through all request on the dasd_device request queue, + * terminate them on the cdev if necessary, and return them to the + * submitting layer via callback. + * Note: + * Make sure that all 'submitting layers' still exist when + * this function is called!. In other words, when 'device' is a base + * device then all block layer requests must have been removed before + * via dasd_flush_block_queue. */ -static int -dasd_flush_ccw_queue(struct dasd_device * device, int all) +int dasd_flush_device_queue(struct dasd_device *device) { - struct dasd_ccw_req *cqr, *orig, *n; - int rc, i; - + struct dasd_ccw_req *cqr, *n; + int rc; struct list_head flush_queue; INIT_LIST_HEAD(&flush_queue); spin_lock_irq(get_ccwdev_lock(device->cdev)); rc = 0; -restart: - list_for_each_entry_safe(cqr, n, &device->ccw_queue, list) { - /* get original request of erp request-chain */ - for (orig = cqr; orig->refers != NULL; orig = orig->refers); - - /* Flush all request or only block device requests? */ - if (all == 0 && cqr->callback != dasd_end_request_cb && - orig->callback != dasd_end_request_cb) { - continue; - } + list_for_each_entry_safe(cqr, n, &device->ccw_queue, devlist) { /* Check status and move request to flush_queue */ switch (cqr->status) { case DASD_CQR_IN_IO: @@ -1387,90 +1279,60 @@ restart: } break; case DASD_CQR_QUEUED: - case DASD_CQR_ERROR: - /* set request to FAILED */ cqr->stopclk = get_clock(); - cqr->status = DASD_CQR_FAILED; + cqr->status = DASD_CQR_CLEARED; break; - default: /* do not touch the others */ + default: /* no need to modify the others */ break; } - /* Rechain request (including erp chain) */ - for (i = 0; cqr != NULL; cqr = cqr->refers, i++) { - cqr->endclk = get_clock(); - list_move_tail(&cqr->list, &flush_queue); - } - if (i > 1) - /* moved more than one request - need to restart */ - goto restart; + list_move_tail(&cqr->devlist, &flush_queue); } - finished: spin_unlock_irq(get_ccwdev_lock(device->cdev)); - /* Now call the callback function of flushed requests */ -restart_cb: - list_for_each_entry_safe(cqr, n, &flush_queue, list) { - if (cqr->status == DASD_CQR_CLEAR) { - /* wait for clear interrupt! */ - wait_event(dasd_flush_wq, _wait_for_clear(cqr)); - cqr->status = DASD_CQR_FAILED; - } - /* Process finished ERP request. */ - if (cqr->refers) { - __dasd_process_erp(device, cqr); - /* restart list_for_xx loop since dasd_process_erp - * might remove multiple elements */ - goto restart_cb; - } - /* call the callback function */ - cqr->endclk = get_clock(); - if (cqr->callback != NULL) - (cqr->callback)(cqr, cqr->callback_data); - } + /* + * After this point all requests must be in state CLEAR_PENDING, + * CLEARED, SUCCESS or ERROR. Now wait for CLEAR_PENDING to become + * one of the others. + */ + list_for_each_entry_safe(cqr, n, &flush_queue, devlist) + wait_event(dasd_flush_wq, + (cqr->status != DASD_CQR_CLEAR_PENDING)); + /* + * Now set each request back to TERMINATED, DONE or NEED_ERP + * and call the callback function of flushed requests + */ + __dasd_device_process_final_queue(device, &flush_queue); return rc; } /* * Acquire the device lock and process queues for the device. */ -static void -dasd_tasklet(struct dasd_device * device) +static void dasd_device_tasklet(struct dasd_device *device) { struct list_head final_queue; - struct list_head *l, *n; - struct dasd_ccw_req *cqr; atomic_set (&device->tasklet_scheduled, 0); INIT_LIST_HEAD(&final_queue); spin_lock_irq(get_ccwdev_lock(device->cdev)); /* Check expire time of first request on the ccw queue. */ - __dasd_check_expire(device); - /* Finish off requests on ccw queue */ - __dasd_process_ccw_queue(device, &final_queue); + __dasd_device_check_expire(device); + /* find final requests on ccw queue */ + __dasd_device_process_ccw_queue(device, &final_queue); spin_unlock_irq(get_ccwdev_lock(device->cdev)); /* Now call the callback function of requests with final status */ - list_for_each_safe(l, n, &final_queue) { - cqr = list_entry(l, struct dasd_ccw_req, list); - list_del_init(&cqr->list); - if (cqr->callback != NULL) - (cqr->callback)(cqr, cqr->callback_data); - } - spin_lock_irq(&device->request_queue_lock); - spin_lock(get_ccwdev_lock(device->cdev)); - /* Get new request from the block device request queue */ - __dasd_process_blk_queue(device); + __dasd_device_process_final_queue(device, &final_queue); + spin_lock_irq(get_ccwdev_lock(device->cdev)); /* Now check if the head of the ccw queue needs to be started. */ - __dasd_start_head(device); - spin_unlock(get_ccwdev_lock(device->cdev)); - spin_unlock_irq(&device->request_queue_lock); + __dasd_device_start_head(device); + spin_unlock_irq(get_ccwdev_lock(device->cdev)); dasd_put_device(device); } /* * Schedules a call to dasd_tasklet over the device tasklet. */ -void -dasd_schedule_bh(struct dasd_device * device) +void dasd_schedule_device_bh(struct dasd_device *device) { /* Protect against rescheduling. */ if (atomic_cmpxchg (&device->tasklet_scheduled, 0, 1) != 0) @@ -1480,160 +1342,109 @@ dasd_schedule_bh(struct dasd_device * device) } /* - * Queue a request to the head of the ccw_queue. Start the I/O if - * possible. + * Queue a request to the head of the device ccw_queue. + * Start the I/O if possible. */ -void -dasd_add_request_head(struct dasd_ccw_req *req) +void dasd_add_request_head(struct dasd_ccw_req *cqr) { struct dasd_device *device; unsigned long flags; - device = req->device; + device = cqr->startdev; spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - req->status = DASD_CQR_QUEUED; - req->device = device; - list_add(&req->list, &device->ccw_queue); + cqr->status = DASD_CQR_QUEUED; + list_add(&cqr->devlist, &device->ccw_queue); /* let the bh start the request to keep them in order */ - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); } /* - * Queue a request to the tail of the ccw_queue. Start the I/O if - * possible. + * Queue a request to the tail of the device ccw_queue. + * Start the I/O if possible. */ -void -dasd_add_request_tail(struct dasd_ccw_req *req) +void dasd_add_request_tail(struct dasd_ccw_req *cqr) { struct dasd_device *device; unsigned long flags; - device = req->device; + device = cqr->startdev; spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - req->status = DASD_CQR_QUEUED; - req->device = device; - list_add_tail(&req->list, &device->ccw_queue); + cqr->status = DASD_CQR_QUEUED; + list_add_tail(&cqr->devlist, &device->ccw_queue); /* let the bh start the request to keep them in order */ - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); } /* - * Wakeup callback. + * Wakeup helper for the 'sleep_on' functions. */ -static void -dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data) +static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data) { wake_up((wait_queue_head_t *) data); } -static inline int -_wait_for_wakeup(struct dasd_ccw_req *cqr) +static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr) { struct dasd_device *device; int rc; - device = cqr->device; + device = cqr->startdev; spin_lock_irq(get_ccwdev_lock(device->cdev)); rc = ((cqr->status == DASD_CQR_DONE || - cqr->status == DASD_CQR_FAILED) && - list_empty(&cqr->list)); + cqr->status == DASD_CQR_NEED_ERP || + cqr->status == DASD_CQR_TERMINATED) && + list_empty(&cqr->devlist)); spin_unlock_irq(get_ccwdev_lock(device->cdev)); return rc; } /* - * Attempts to start a special ccw queue and waits for its completion. + * Queue a request to the tail of the device ccw_queue and wait for + * it's completion. */ -int -dasd_sleep_on(struct dasd_ccw_req * cqr) +int dasd_sleep_on(struct dasd_ccw_req *cqr) { wait_queue_head_t wait_q; struct dasd_device *device; int rc; - device = cqr->device; - spin_lock_irq(get_ccwdev_lock(device->cdev)); + device = cqr->startdev; init_waitqueue_head (&wait_q); cqr->callback = dasd_wakeup_cb; cqr->callback_data = (void *) &wait_q; - cqr->status = DASD_CQR_QUEUED; - list_add_tail(&cqr->list, &device->ccw_queue); - - /* let the bh start the request to keep them in order */ - dasd_schedule_bh(device); - - spin_unlock_irq(get_ccwdev_lock(device->cdev)); - + dasd_add_request_tail(cqr); wait_event(wait_q, _wait_for_wakeup(cqr)); /* Request status is either done or failed. */ - rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; + rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; return rc; } /* - * Attempts to start a special ccw queue and wait interruptible - * for its completion. + * Queue a request to the tail of the device ccw_queue and wait + * interruptible for it's completion. */ -int -dasd_sleep_on_interruptible(struct dasd_ccw_req * cqr) +int dasd_sleep_on_interruptible(struct dasd_ccw_req *cqr) { wait_queue_head_t wait_q; struct dasd_device *device; - int rc, finished; - - device = cqr->device; - spin_lock_irq(get_ccwdev_lock(device->cdev)); + int rc; + device = cqr->startdev; init_waitqueue_head (&wait_q); cqr->callback = dasd_wakeup_cb; cqr->callback_data = (void *) &wait_q; - cqr->status = DASD_CQR_QUEUED; - list_add_tail(&cqr->list, &device->ccw_queue); - - /* let the bh start the request to keep them in order */ - dasd_schedule_bh(device); - spin_unlock_irq(get_ccwdev_lock(device->cdev)); - - finished = 0; - while (!finished) { - rc = wait_event_interruptible(wait_q, _wait_for_wakeup(cqr)); - if (rc != -ERESTARTSYS) { - /* Request is final (done or failed) */ - rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; - break; - } - spin_lock_irq(get_ccwdev_lock(device->cdev)); - switch (cqr->status) { - case DASD_CQR_IN_IO: - /* terminate runnig cqr */ - if (device->discipline->term_IO) { - cqr->retries = -1; - device->discipline->term_IO(cqr); - /* wait (non-interruptible) for final status - * because signal ist still pending */ - spin_unlock_irq(get_ccwdev_lock(device->cdev)); - wait_event(wait_q, _wait_for_wakeup(cqr)); - spin_lock_irq(get_ccwdev_lock(device->cdev)); - rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; - finished = 1; - } - break; - case DASD_CQR_QUEUED: - /* request */ - list_del_init(&cqr->list); - rc = -EIO; - finished = 1; - break; - default: - /* cqr with 'non-interruptable' status - just wait */ - break; - } - spin_unlock_irq(get_ccwdev_lock(device->cdev)); + dasd_add_request_tail(cqr); + rc = wait_event_interruptible(wait_q, _wait_for_wakeup(cqr)); + if (rc == -ERESTARTSYS) { + dasd_cancel_req(cqr); + /* wait (non-interruptible) for final status */ + wait_event(wait_q, _wait_for_wakeup(cqr)); } + rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; return rc; } @@ -1643,25 +1454,23 @@ dasd_sleep_on_interruptible(struct dasd_ccw_req * cqr) * and be put back to status queued, before the special request is added * to the head of the queue. Then the special request is waited on normally. */ -static inline int -_dasd_term_running_cqr(struct dasd_device *device) +static inline int _dasd_term_running_cqr(struct dasd_device *device) { struct dasd_ccw_req *cqr; if (list_empty(&device->ccw_queue)) return 0; - cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); + cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); return device->discipline->term_IO(cqr); } -int -dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr) +int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr) { wait_queue_head_t wait_q; struct dasd_device *device; int rc; - device = cqr->device; + device = cqr->startdev; spin_lock_irq(get_ccwdev_lock(device->cdev)); rc = _dasd_term_running_cqr(device); if (rc) { @@ -1673,17 +1482,17 @@ dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr) cqr->callback = dasd_wakeup_cb; cqr->callback_data = (void *) &wait_q; cqr->status = DASD_CQR_QUEUED; - list_add(&cqr->list, &device->ccw_queue); + list_add(&cqr->devlist, &device->ccw_queue); /* let the bh start the request to keep them in order */ - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); spin_unlock_irq(get_ccwdev_lock(device->cdev)); wait_event(wait_q, _wait_for_wakeup(cqr)); /* Request status is either done or failed. */ - rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; + rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; return rc; } @@ -1692,11 +1501,14 @@ dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr) * This is useful to timeout requests. The request will be * terminated if it is currently in i/o. * Returns 1 if the request has been terminated. + * 0 if there was no need to terminate the request (not started yet) + * negative error code if termination failed + * Cancellation of a request is an asynchronous operation! The calling + * function has to wait until the request is properly returned via callback. */ -int -dasd_cancel_req(struct dasd_ccw_req *cqr) +int dasd_cancel_req(struct dasd_ccw_req *cqr) { - struct dasd_device *device = cqr->device; + struct dasd_device *device = cqr->startdev; unsigned long flags; int rc; @@ -1704,74 +1516,454 @@ dasd_cancel_req(struct dasd_ccw_req *cqr) spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); switch (cqr->status) { case DASD_CQR_QUEUED: - /* request was not started - just set to failed */ - cqr->status = DASD_CQR_FAILED; + /* request was not started - just set to cleared */ + cqr->status = DASD_CQR_CLEARED; break; case DASD_CQR_IN_IO: /* request in IO - terminate IO and release again */ - if (device->discipline->term_IO(cqr) != 0) - /* what to do if unable to terminate ?????? - e.g. not _IN_IO */ - cqr->status = DASD_CQR_FAILED; - cqr->stopclk = get_clock(); - rc = 1; + rc = device->discipline->term_IO(cqr); + if (rc) { + DEV_MESSAGE(KERN_ERR, device, + "dasd_cancel_req is unable " + " to terminate request %p, rc = %d", + cqr, rc); + } else { + cqr->stopclk = get_clock(); + rc = 1; + } break; - case DASD_CQR_DONE: - case DASD_CQR_FAILED: - /* already finished - do nothing */ + default: /* already finished or clear pending - do nothing */ break; - default: - DEV_MESSAGE(KERN_ALERT, device, - "invalid status %02x in request", - cqr->status); + } + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + dasd_schedule_device_bh(device); + return rc; +} + + +/* + * SECTION: Operations of the dasd_block layer. + */ + +/* + * Timeout function for dasd_block. This is used when the block layer + * is waiting for something that may not come reliably, (e.g. a state + * change interrupt) + */ +static void dasd_block_timeout(unsigned long ptr) +{ + unsigned long flags; + struct dasd_block *block; + + block = (struct dasd_block *) ptr; + spin_lock_irqsave(get_ccwdev_lock(block->base->cdev), flags); + /* re-activate request queue */ + block->base->stopped &= ~DASD_STOPPED_PENDING; + spin_unlock_irqrestore(get_ccwdev_lock(block->base->cdev), flags); + dasd_schedule_block_bh(block); +} + +/* + * Setup timeout for a dasd_block in jiffies. + */ +void dasd_block_set_timer(struct dasd_block *block, int expires) +{ + if (expires == 0) { + if (timer_pending(&block->timer)) + del_timer(&block->timer); + return; + } + if (timer_pending(&block->timer)) { + if (mod_timer(&block->timer, jiffies + expires)) + return; + } + block->timer.function = dasd_block_timeout; + block->timer.data = (unsigned long) block; + block->timer.expires = jiffies + expires; + add_timer(&block->timer); +} + +/* + * Clear timeout for a dasd_block. + */ +void dasd_block_clear_timer(struct dasd_block *block) +{ + if (timer_pending(&block->timer)) + del_timer(&block->timer); +} + +/* + * posts the buffer_cache about a finalized request + */ +static inline void dasd_end_request(struct request *req, int error) +{ + if (__blk_end_request(req, error, blk_rq_bytes(req))) BUG(); +} + +/* + * Process finished error recovery ccw. + */ +static inline void __dasd_block_process_erp(struct dasd_block *block, + struct dasd_ccw_req *cqr) +{ + dasd_erp_fn_t erp_fn; + struct dasd_device *device = block->base; + + if (cqr->status == DASD_CQR_DONE) + DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful"); + else + DEV_MESSAGE(KERN_ERR, device, "%s", "ERP unsuccessful"); + erp_fn = device->discipline->erp_postaction(cqr); + erp_fn(cqr); +} +/* + * Fetch requests from the block device queue. + */ +static void __dasd_process_request_queue(struct dasd_block *block) +{ + struct request_queue *queue; + struct request *req; + struct dasd_ccw_req *cqr; + struct dasd_device *basedev; + unsigned long flags; + queue = block->request_queue; + basedev = block->base; + /* No queue ? Then there is nothing to do. */ + if (queue == NULL) + return; + + /* + * We requeue request from the block device queue to the ccw + * queue only in two states. In state DASD_STATE_READY the + * partition detection is done and we need to requeue requests + * for that. State DASD_STATE_ONLINE is normal block device + * operation. + */ + if (basedev->state < DASD_STATE_READY) + return; + /* Now we try to fetch requests from the request queue */ + while (!blk_queue_plugged(queue) && + elv_next_request(queue)) { + + req = elv_next_request(queue); + + if (basedev->features & DASD_FEATURE_READONLY && + rq_data_dir(req) == WRITE) { + DBF_DEV_EVENT(DBF_ERR, basedev, + "Rejecting write request %p", + req); + blkdev_dequeue_request(req); + dasd_end_request(req, -EIO); + continue; + } + cqr = basedev->discipline->build_cp(basedev, block, req); + if (IS_ERR(cqr)) { + if (PTR_ERR(cqr) == -EBUSY) + break; /* normal end condition */ + if (PTR_ERR(cqr) == -ENOMEM) + break; /* terminate request queue loop */ + if (PTR_ERR(cqr) == -EAGAIN) { + /* + * The current request cannot be build right + * now, we have to try later. If this request + * is the head-of-queue we stop the device + * for 1/2 second. + */ + if (!list_empty(&block->ccw_queue)) + break; + spin_lock_irqsave(get_ccwdev_lock(basedev->cdev), flags); + basedev->stopped |= DASD_STOPPED_PENDING; + spin_unlock_irqrestore(get_ccwdev_lock(basedev->cdev), flags); + dasd_block_set_timer(block, HZ/2); + break; + } + DBF_DEV_EVENT(DBF_ERR, basedev, + "CCW creation failed (rc=%ld) " + "on request %p", + PTR_ERR(cqr), req); + blkdev_dequeue_request(req); + dasd_end_request(req, -EIO); + continue; + } + /* + * Note: callback is set to dasd_return_cqr_cb in + * __dasd_block_start_head to cover erp requests as well + */ + cqr->callback_data = (void *) req; + cqr->status = DASD_CQR_FILLED; + blkdev_dequeue_request(req); + list_add_tail(&cqr->blocklist, &block->ccw_queue); + dasd_profile_start(block, cqr, req); + } +} + +static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr) +{ + struct request *req; + int status; + int error = 0; + + req = (struct request *) cqr->callback_data; + dasd_profile_end(cqr->block, cqr, req); + status = cqr->memdev->discipline->free_cp(cqr, req); + if (status <= 0) + error = status ? status : -EIO; + dasd_end_request(req, error); +} + +/* + * Process ccw request queue. + */ +static void __dasd_process_block_ccw_queue(struct dasd_block *block, + struct list_head *final_queue) +{ + struct list_head *l, *n; + struct dasd_ccw_req *cqr; + dasd_erp_fn_t erp_fn; + unsigned long flags; + struct dasd_device *base = block->base; + +restart: + /* Process request with final status. */ + list_for_each_safe(l, n, &block->ccw_queue) { + cqr = list_entry(l, struct dasd_ccw_req, blocklist); + if (cqr->status != DASD_CQR_DONE && + cqr->status != DASD_CQR_FAILED && + cqr->status != DASD_CQR_NEED_ERP && + cqr->status != DASD_CQR_TERMINATED) + continue; + + if (cqr->status == DASD_CQR_TERMINATED) { + base->discipline->handle_terminated_request(cqr); + goto restart; + } + + /* Process requests that may be recovered */ + if (cqr->status == DASD_CQR_NEED_ERP) { + if (cqr->irb.esw.esw0.erw.cons && + test_bit(DASD_CQR_FLAGS_USE_ERP, + &cqr->flags)) { + erp_fn = base->discipline->erp_action(cqr); + erp_fn(cqr); + } + goto restart; + } + + /* First of all call extended error reporting. */ + if (dasd_eer_enabled(base) && + cqr->status == DASD_CQR_FAILED) { + dasd_eer_write(base, cqr, DASD_EER_FATALERROR); + + /* restart request */ + cqr->status = DASD_CQR_FILLED; + cqr->retries = 255; + spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); + base->stopped |= DASD_STOPPED_QUIESCE; + spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), + flags); + goto restart; + } + + /* Process finished ERP request. */ + if (cqr->refers) { + __dasd_block_process_erp(block, cqr); + goto restart; + } + + /* Rechain finished requests to final queue */ + cqr->endclk = get_clock(); + list_move_tail(&cqr->blocklist, final_queue); + } +} + +static void dasd_return_cqr_cb(struct dasd_ccw_req *cqr, void *data) +{ + dasd_schedule_block_bh(cqr->block); +} + +static void __dasd_block_start_head(struct dasd_block *block) +{ + struct dasd_ccw_req *cqr; + + if (list_empty(&block->ccw_queue)) + return; + /* We allways begin with the first requests on the queue, as some + * of previously started requests have to be enqueued on a + * dasd_device again for error recovery. + */ + list_for_each_entry(cqr, &block->ccw_queue, blocklist) { + if (cqr->status != DASD_CQR_FILLED) + continue; + /* Non-temporary stop condition will trigger fail fast */ + if (block->base->stopped & ~DASD_STOPPED_PENDING && + test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && + (!dasd_eer_enabled(block->base))) { + cqr->status = DASD_CQR_FAILED; + dasd_schedule_block_bh(block); + continue; + } + /* Don't try to start requests if device is stopped */ + if (block->base->stopped) + return; + + /* just a fail safe check, should not happen */ + if (!cqr->startdev) + cqr->startdev = block->base; + + /* make sure that the requests we submit find their way back */ + cqr->callback = dasd_return_cqr_cb; + + dasd_add_request_tail(cqr); + } +} + +/* + * Central dasd_block layer routine. Takes requests from the generic + * block layer request queue, creates ccw requests, enqueues them on + * a dasd_device and processes ccw requests that have been returned. + */ +static void dasd_block_tasklet(struct dasd_block *block) +{ + struct list_head final_queue; + struct list_head *l, *n; + struct dasd_ccw_req *cqr; + + atomic_set(&block->tasklet_scheduled, 0); + INIT_LIST_HEAD(&final_queue); + spin_lock(&block->queue_lock); + /* Finish off requests on ccw queue */ + __dasd_process_block_ccw_queue(block, &final_queue); + spin_unlock(&block->queue_lock); + /* Now call the callback function of requests with final status */ + spin_lock_irq(&block->request_queue_lock); + list_for_each_safe(l, n, &final_queue) { + cqr = list_entry(l, struct dasd_ccw_req, blocklist); + list_del_init(&cqr->blocklist); + __dasd_cleanup_cqr(cqr); + } + spin_lock(&block->queue_lock); + /* Get new request from the block device request queue */ + __dasd_process_request_queue(block); + /* Now check if the head of the ccw queue needs to be started. */ + __dasd_block_start_head(block); + spin_unlock(&block->queue_lock); + spin_unlock_irq(&block->request_queue_lock); + dasd_put_device(block->base); +} + +static void _dasd_wake_block_flush_cb(struct dasd_ccw_req *cqr, void *data) +{ + wake_up(&dasd_flush_wq); +} + +/* + * Go through all request on the dasd_block request queue, cancel them + * on the respective dasd_device, and return them to the generic + * block layer. + */ +static int dasd_flush_block_queue(struct dasd_block *block) +{ + struct dasd_ccw_req *cqr, *n; + int rc, i; + struct list_head flush_queue; + + INIT_LIST_HEAD(&flush_queue); + spin_lock_bh(&block->queue_lock); + rc = 0; +restart: + list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { + /* if this request currently owned by a dasd_device cancel it */ + if (cqr->status >= DASD_CQR_QUEUED) + rc = dasd_cancel_req(cqr); + if (rc < 0) + break; + /* Rechain request (including erp chain) so it won't be + * touched by the dasd_block_tasklet anymore. + * Replace the callback so we notice when the request + * is returned from the dasd_device layer. + */ + cqr->callback = _dasd_wake_block_flush_cb; + for (i = 0; cqr != NULL; cqr = cqr->refers, i++) + list_move_tail(&cqr->blocklist, &flush_queue); + if (i > 1) + /* moved more than one request - need to restart */ + goto restart; + } + spin_unlock_bh(&block->queue_lock); + /* Now call the callback function of flushed requests */ +restart_cb: + list_for_each_entry_safe(cqr, n, &flush_queue, blocklist) { + wait_event(dasd_flush_wq, (cqr->status < DASD_CQR_QUEUED)); + /* Process finished ERP request. */ + if (cqr->refers) { + __dasd_block_process_erp(block, cqr); + /* restart list_for_xx loop since dasd_process_erp + * might remove multiple elements */ + goto restart_cb; + } + /* call the callback function */ + cqr->endclk = get_clock(); + list_del_init(&cqr->blocklist); + __dasd_cleanup_cqr(cqr); } - spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); - dasd_schedule_bh(device); return rc; } /* - * SECTION: Block device operations (request queue, partitions, open, release). + * Schedules a call to dasd_tasklet over the device tasklet. + */ +void dasd_schedule_block_bh(struct dasd_block *block) +{ + /* Protect against rescheduling. */ + if (atomic_cmpxchg(&block->tasklet_scheduled, 0, 1) != 0) + return; + /* life cycle of block is bound to it's base device */ + dasd_get_device(block->base); + tasklet_hi_schedule(&block->tasklet); +} + + +/* + * SECTION: external block device operations + * (request queue handling, open, release, etc.) */ /* * Dasd request queue function. Called from ll_rw_blk.c */ -static void -do_dasd_request(struct request_queue * queue) +static void do_dasd_request(struct request_queue *queue) { - struct dasd_device *device; + struct dasd_block *block; - device = (struct dasd_device *) queue->queuedata; - spin_lock(get_ccwdev_lock(device->cdev)); + block = queue->queuedata; + spin_lock(&block->queue_lock); /* Get new request from the block device request queue */ - __dasd_process_blk_queue(device); + __dasd_process_request_queue(block); /* Now check if the head of the ccw queue needs to be started. */ - __dasd_start_head(device); - spin_unlock(get_ccwdev_lock(device->cdev)); + __dasd_block_start_head(block); + spin_unlock(&block->queue_lock); } /* * Allocate and initialize request queue and default I/O scheduler. */ -static int -dasd_alloc_queue(struct dasd_device * device) +static int dasd_alloc_queue(struct dasd_block *block) { int rc; - device->request_queue = blk_init_queue(do_dasd_request, - &device->request_queue_lock); - if (device->request_queue == NULL) + block->request_queue = blk_init_queue(do_dasd_request, + &block->request_queue_lock); + if (block->request_queue == NULL) return -ENOMEM; - device->request_queue->queuedata = device; + block->request_queue->queuedata = block; - elevator_exit(device->request_queue->elevator); - rc = elevator_init(device->request_queue, "deadline"); + elevator_exit(block->request_queue->elevator); + rc = elevator_init(block->request_queue, "deadline"); if (rc) { - blk_cleanup_queue(device->request_queue); + blk_cleanup_queue(block->request_queue); return rc; } return 0; @@ -1780,79 +1972,76 @@ dasd_alloc_queue(struct dasd_device * device) /* * Allocate and initialize request queue. */ -static void -dasd_setup_queue(struct dasd_device * device) +static void dasd_setup_queue(struct dasd_block *block) { int max; - blk_queue_hardsect_size(device->request_queue, device->bp_block); - max = device->discipline->max_blocks << device->s2b_shift; - blk_queue_max_sectors(device->request_queue, max); - blk_queue_max_phys_segments(device->request_queue, -1L); - blk_queue_max_hw_segments(device->request_queue, -1L); - blk_queue_max_segment_size(device->request_queue, -1L); - blk_queue_segment_boundary(device->request_queue, -1L); - blk_queue_ordered(device->request_queue, QUEUE_ORDERED_TAG, NULL); + blk_queue_hardsect_size(block->request_queue, block->bp_block); + max = block->base->discipline->max_blocks << block->s2b_shift; + blk_queue_max_sectors(block->request_queue, max); + blk_queue_max_phys_segments(block->request_queue, -1L); + blk_queue_max_hw_segments(block->request_queue, -1L); + blk_queue_max_segment_size(block->request_queue, -1L); + blk_queue_segment_boundary(block->request_queue, -1L); + blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN, NULL); } /* * Deactivate and free request queue. */ -static void -dasd_free_queue(struct dasd_device * device) +static void dasd_free_queue(struct dasd_block *block) { - if (device->request_queue) { - blk_cleanup_queue(device->request_queue); - device->request_queue = NULL; + if (block->request_queue) { + blk_cleanup_queue(block->request_queue); + block->request_queue = NULL; } } /* * Flush request on the request queue. */ -static void -dasd_flush_request_queue(struct dasd_device * device) +static void dasd_flush_request_queue(struct dasd_block *block) { struct request *req; - if (!device->request_queue) + if (!block->request_queue) return; - spin_lock_irq(&device->request_queue_lock); - while ((req = elv_next_request(device->request_queue))) { + spin_lock_irq(&block->request_queue_lock); + while ((req = elv_next_request(block->request_queue))) { blkdev_dequeue_request(req); - dasd_end_request(req, 0); + dasd_end_request(req, -EIO); } - spin_unlock_irq(&device->request_queue_lock); + spin_unlock_irq(&block->request_queue_lock); } -static int -dasd_open(struct inode *inp, struct file *filp) +static int dasd_open(struct inode *inp, struct file *filp) { struct gendisk *disk = inp->i_bdev->bd_disk; - struct dasd_device *device = disk->private_data; + struct dasd_block *block = disk->private_data; + struct dasd_device *base = block->base; int rc; - atomic_inc(&device->open_count); - if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { + atomic_inc(&block->open_count); + if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) { rc = -ENODEV; goto unlock; } - if (!try_module_get(device->discipline->owner)) { + if (!try_module_get(base->discipline->owner)) { rc = -EINVAL; goto unlock; } if (dasd_probeonly) { - DEV_MESSAGE(KERN_INFO, device, "%s", + DEV_MESSAGE(KERN_INFO, base, "%s", "No access to device due to probeonly mode"); rc = -EPERM; goto out; } - if (device->state <= DASD_STATE_BASIC) { - DBF_DEV_EVENT(DBF_ERR, device, " %s", + if (base->state <= DASD_STATE_BASIC) { + DBF_DEV_EVENT(DBF_ERR, base, " %s", " Cannot open unrecognized device"); rc = -ENODEV; goto out; @@ -1861,41 +2050,41 @@ dasd_open(struct inode *inp, struct file *filp) return 0; out: - module_put(device->discipline->owner); + module_put(base->discipline->owner); unlock: - atomic_dec(&device->open_count); + atomic_dec(&block->open_count); return rc; } -static int -dasd_release(struct inode *inp, struct file *filp) +static int dasd_release(struct inode *inp, struct file *filp) { struct gendisk *disk = inp->i_bdev->bd_disk; - struct dasd_device *device = disk->private_data; + struct dasd_block *block = disk->private_data; - atomic_dec(&device->open_count); - module_put(device->discipline->owner); + atomic_dec(&block->open_count); + module_put(block->base->discipline->owner); return 0; } /* * Return disk geometry. */ -static int -dasd_getgeo(struct block_device *bdev, struct hd_geometry *geo) +static int dasd_getgeo(struct block_device *bdev, struct hd_geometry *geo) { - struct dasd_device *device; + struct dasd_block *block; + struct dasd_device *base; - device = bdev->bd_disk->private_data; - if (!device) + block = bdev->bd_disk->private_data; + base = block->base; + if (!block) return -ENODEV; - if (!device->discipline || - !device->discipline->fill_geometry) + if (!base->discipline || + !base->discipline->fill_geometry) return -EINVAL; - device->discipline->fill_geometry(device, geo); - geo->start = get_start_sect(bdev) >> device->s2b_shift; + base->discipline->fill_geometry(block, geo); + geo->start = get_start_sect(bdev) >> block->s2b_shift; return 0; } @@ -1909,6 +2098,9 @@ dasd_device_operations = { .getgeo = dasd_getgeo, }; +/******************************************************************************* + * end of block device operations + */ static void dasd_exit(void) @@ -1937,9 +2129,8 @@ dasd_exit(void) * Initial attempt at a probe function. this can be simplified once * the other detection code is gone. */ -int -dasd_generic_probe (struct ccw_device *cdev, - struct dasd_discipline *discipline) +int dasd_generic_probe(struct ccw_device *cdev, + struct dasd_discipline *discipline) { int ret; @@ -1969,19 +2160,20 @@ dasd_generic_probe (struct ccw_device *cdev, ret = ccw_device_set_online(cdev); if (ret) printk(KERN_WARNING - "dasd_generic_probe: could not initially online " - "ccw-device %s\n", cdev->dev.bus_id); - return ret; + "dasd_generic_probe: could not initially " + "online ccw-device %s; return code: %d\n", + cdev->dev.bus_id, ret); + return 0; } /* * This will one day be called from a global not_oper handler. * It is also used by driver_unregister during module unload. */ -void -dasd_generic_remove (struct ccw_device *cdev) +void dasd_generic_remove(struct ccw_device *cdev) { struct dasd_device *device; + struct dasd_block *block; cdev->handler = NULL; @@ -2001,7 +2193,15 @@ dasd_generic_remove (struct ccw_device *cdev) */ dasd_set_target_state(device, DASD_STATE_NEW); /* dasd_delete_device destroys the device reference. */ + block = device->block; + device->block = NULL; dasd_delete_device(device); + /* + * life cycle of block is bound to device, so delete it after + * device was safely removed + */ + if (block) + dasd_free_block(block); } /* @@ -2009,10 +2209,8 @@ dasd_generic_remove (struct ccw_device *cdev) * the device is detected for the first time and is supposed to be used * or the user has started activation through sysfs. */ -int -dasd_generic_set_online (struct ccw_device *cdev, - struct dasd_discipline *base_discipline) - +int dasd_generic_set_online(struct ccw_device *cdev, + struct dasd_discipline *base_discipline) { struct dasd_discipline *discipline; struct dasd_device *device; @@ -2048,6 +2246,7 @@ dasd_generic_set_online (struct ccw_device *cdev, device->base_discipline = base_discipline; device->discipline = discipline; + /* check_device will allocate block device if necessary */ rc = discipline->check_device(device); if (rc) { printk (KERN_WARNING @@ -2067,6 +2266,8 @@ dasd_generic_set_online (struct ccw_device *cdev, cdev->dev.bus_id); rc = -ENODEV; dasd_set_target_state(device, DASD_STATE_NEW); + if (device->block) + dasd_free_block(device->block); dasd_delete_device(device); } else pr_debug("dasd_generic device %s found\n", @@ -2081,10 +2282,10 @@ dasd_generic_set_online (struct ccw_device *cdev, return rc; } -int -dasd_generic_set_offline (struct ccw_device *cdev) +int dasd_generic_set_offline(struct ccw_device *cdev) { struct dasd_device *device; + struct dasd_block *block; int max_count, open_count; device = dasd_device_from_cdev(cdev); @@ -2101,30 +2302,39 @@ dasd_generic_set_offline (struct ccw_device *cdev) * the blkdev_get in dasd_scan_partitions. We are only interested * in the other openers. */ - max_count = device->bdev ? 0 : -1; - open_count = (int) atomic_read(&device->open_count); - if (open_count > max_count) { - if (open_count > 0) - printk (KERN_WARNING "Can't offline dasd device with " - "open count = %i.\n", - open_count); - else - printk (KERN_WARNING "%s", - "Can't offline dasd device due to internal " - "use\n"); - clear_bit(DASD_FLAG_OFFLINE, &device->flags); - dasd_put_device(device); - return -EBUSY; + if (device->block) { + struct dasd_block *block = device->block; + max_count = block->bdev ? 0 : -1; + open_count = (int) atomic_read(&block->open_count); + if (open_count > max_count) { + if (open_count > 0) + printk(KERN_WARNING "Can't offline dasd " + "device with open count = %i.\n", + open_count); + else + printk(KERN_WARNING "%s", + "Can't offline dasd device due " + "to internal use\n"); + clear_bit(DASD_FLAG_OFFLINE, &device->flags); + dasd_put_device(device); + return -EBUSY; + } } dasd_set_target_state(device, DASD_STATE_NEW); /* dasd_delete_device destroys the device reference. */ + block = device->block; + device->block = NULL; dasd_delete_device(device); - + /* + * life cycle of block is bound to device, so delete it after + * device was safely removed + */ + if (block) + dasd_free_block(block); return 0; } -int -dasd_generic_notify(struct ccw_device *cdev, int event) +int dasd_generic_notify(struct ccw_device *cdev, int event) { struct dasd_device *device; struct dasd_ccw_req *cqr; @@ -2145,27 +2355,22 @@ dasd_generic_notify(struct ccw_device *cdev, int event) if (device->state < DASD_STATE_BASIC) break; /* Device is active. We want to keep it. */ - if (test_bit(DASD_FLAG_DSC_ERROR, &device->flags)) { - list_for_each_entry(cqr, &device->ccw_queue, list) - if (cqr->status == DASD_CQR_IN_IO) - cqr->status = DASD_CQR_FAILED; - device->stopped |= DASD_STOPPED_DC_EIO; - } else { - list_for_each_entry(cqr, &device->ccw_queue, list) - if (cqr->status == DASD_CQR_IN_IO) { - cqr->status = DASD_CQR_QUEUED; - cqr->retries++; - } - device->stopped |= DASD_STOPPED_DC_WAIT; - dasd_set_timer(device, 0); - } - dasd_schedule_bh(device); + list_for_each_entry(cqr, &device->ccw_queue, devlist) + if (cqr->status == DASD_CQR_IN_IO) { + cqr->status = DASD_CQR_QUEUED; + cqr->retries++; + } + device->stopped |= DASD_STOPPED_DC_WAIT; + dasd_device_clear_timer(device); + dasd_schedule_device_bh(device); ret = 1; break; case CIO_OPER: /* FIXME: add a sanity check. */ - device->stopped &= ~(DASD_STOPPED_DC_WAIT|DASD_STOPPED_DC_EIO); - dasd_schedule_bh(device); + device->stopped &= ~DASD_STOPPED_DC_WAIT; + dasd_schedule_device_bh(device); + if (device->block) + dasd_schedule_block_bh(device->block); ret = 1; break; } @@ -2195,7 +2400,8 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device, ccw->cda = (__u32)(addr_t)rdc_buffer; ccw->count = rdc_buffer_size; - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; cqr->expires = 10*HZ; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); cqr->retries = 2; @@ -2217,13 +2423,12 @@ int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic, return PTR_ERR(cqr); ret = dasd_sleep_on(cqr); - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return ret; } EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars); -static int __init -dasd_init(void) +static int __init dasd_init(void) { int rc; @@ -2231,7 +2436,7 @@ dasd_init(void) init_waitqueue_head(&dasd_flush_wq); /* register 'common' DASD debug area, used for all DBF_XXX calls */ - dasd_debug_area = debug_register("dasd", 1, 2, 8 * sizeof (long)); + dasd_debug_area = debug_register("dasd", 1, 1, 8 * sizeof(long)); if (dasd_debug_area == NULL) { rc = -ENOMEM; goto failed; @@ -2277,15 +2482,18 @@ EXPORT_SYMBOL(dasd_diag_discipline_pointer); EXPORT_SYMBOL(dasd_add_request_head); EXPORT_SYMBOL(dasd_add_request_tail); EXPORT_SYMBOL(dasd_cancel_req); -EXPORT_SYMBOL(dasd_clear_timer); +EXPORT_SYMBOL(dasd_device_clear_timer); +EXPORT_SYMBOL(dasd_block_clear_timer); EXPORT_SYMBOL(dasd_enable_device); EXPORT_SYMBOL(dasd_int_handler); EXPORT_SYMBOL(dasd_kfree_request); EXPORT_SYMBOL(dasd_kick_device); EXPORT_SYMBOL(dasd_kmalloc_request); -EXPORT_SYMBOL(dasd_schedule_bh); +EXPORT_SYMBOL(dasd_schedule_device_bh); +EXPORT_SYMBOL(dasd_schedule_block_bh); EXPORT_SYMBOL(dasd_set_target_state); -EXPORT_SYMBOL(dasd_set_timer); +EXPORT_SYMBOL(dasd_device_set_timer); +EXPORT_SYMBOL(dasd_block_set_timer); EXPORT_SYMBOL(dasd_sfree_request); EXPORT_SYMBOL(dasd_sleep_on); EXPORT_SYMBOL(dasd_sleep_on_immediatly); @@ -2299,4 +2507,7 @@ EXPORT_SYMBOL_GPL(dasd_generic_remove); EXPORT_SYMBOL_GPL(dasd_generic_notify); EXPORT_SYMBOL_GPL(dasd_generic_set_online); EXPORT_SYMBOL_GPL(dasd_generic_set_offline); - +EXPORT_SYMBOL_GPL(dasd_generic_handle_state_change); +EXPORT_SYMBOL_GPL(dasd_flush_device_queue); +EXPORT_SYMBOL_GPL(dasd_alloc_block); +EXPORT_SYMBOL_GPL(dasd_free_block); diff --git a/drivers/s390/block/dasd_3370_erp.c b/drivers/s390/block/dasd_3370_erp.c deleted file mode 100644 index 1ddab89..0000000 --- a/drivers/s390/block/dasd_3370_erp.c +++ /dev/null @@ -1,84 +0,0 @@ -/* - * File...........: linux/drivers/s390/block/dasd_3370_erp.c - * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> - * Bugreports.to..: <Linux390@de.ibm.com> - * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000 - * - */ - -#define PRINTK_HEADER "dasd_erp(3370)" - -#include "dasd_int.h" - - -/* - * DASD_3370_ERP_EXAMINE - * - * DESCRIPTION - * Checks only for fatal/no/recover error. - * A detailed examination of the sense data is done later outside - * the interrupt handler. - * - * The logic is based on the 'IBM 3880 Storage Control Reference' manual - * 'Chapter 7. 3370 Sense Data'. - * - * RETURN VALUES - * dasd_era_none no error - * dasd_era_fatal for all fatal (unrecoverable errors) - * dasd_era_recover for all others. - */ -dasd_era_t -dasd_3370_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb) -{ - char *sense = irb->ecw; - - /* check for successful execution first */ - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - if (sense[0] & 0x80) { /* CMD reject */ - return dasd_era_fatal; - } - if (sense[0] & 0x40) { /* Drive offline */ - return dasd_era_recover; - } - if (sense[0] & 0x20) { /* Bus out parity */ - return dasd_era_recover; - } - if (sense[0] & 0x10) { /* equipment check */ - if (sense[1] & 0x80) { - return dasd_era_fatal; - } - return dasd_era_recover; - } - if (sense[0] & 0x08) { /* data check */ - if (sense[1] & 0x80) { - return dasd_era_fatal; - } - return dasd_era_recover; - } - if (sense[0] & 0x04) { /* overrun */ - if (sense[1] & 0x80) { - return dasd_era_fatal; - } - return dasd_era_recover; - } - if (sense[1] & 0x40) { /* invalid blocksize */ - return dasd_era_fatal; - } - if (sense[1] & 0x04) { /* file protected */ - return dasd_era_recover; - } - if (sense[1] & 0x01) { /* operation incomplete */ - return dasd_era_recover; - } - if (sense[2] & 0x80) { /* check data erroor */ - return dasd_era_recover; - } - if (sense[2] & 0x10) { /* Env. data present */ - return dasd_era_recover; - } - /* examine the 24 byte sense data */ - return dasd_era_recover; - -} /* END dasd_3370_erp_examine */ diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index 5b7385e..c361ab6 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -26,158 +26,6 @@ struct DCTL_data { /* ***************************************************************************** - * SECTION ERP EXAMINATION - ***************************************************************************** - */ - -/* - * DASD_3990_ERP_EXAMINE_24 - * - * DESCRIPTION - * Checks only for fatal (unrecoverable) error. - * A detailed examination of the sense data is done later outside - * the interrupt handler. - * - * Each bit configuration leading to an action code 2 (Exit with - * programming error or unusual condition indication) - * are handled as fatal errors. - * - * All other configurations are handled as recoverable errors. - * - * RETURN VALUES - * dasd_era_fatal for all fatal (unrecoverable errors) - * dasd_era_recover for all others. - */ -static dasd_era_t -dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense) -{ - - struct dasd_device *device = cqr->device; - - /* check for 'Command Reject' */ - if ((sense[0] & SNS0_CMD_REJECT) && - (!(sense[2] & SNS2_ENV_DATA_PRESENT))) { - - DEV_MESSAGE(KERN_ERR, device, "%s", - "EXAMINE 24: Command Reject detected - " - "fatal error"); - - return dasd_era_fatal; - } - - /* check for 'Invalid Track Format' */ - if ((sense[1] & SNS1_INV_TRACK_FORMAT) && - (!(sense[2] & SNS2_ENV_DATA_PRESENT))) { - - DEV_MESSAGE(KERN_ERR, device, "%s", - "EXAMINE 24: Invalid Track Format detected " - "- fatal error"); - - return dasd_era_fatal; - } - - /* check for 'No Record Found' */ - if (sense[1] & SNS1_NO_REC_FOUND) { - - /* FIXME: fatal error ?!? */ - DEV_MESSAGE(KERN_ERR, device, - "EXAMINE 24: No Record Found detected %s", - device->state <= DASD_STATE_BASIC ? - " " : "- fatal error"); - - return dasd_era_fatal; - } - - /* return recoverable for all others */ - return dasd_era_recover; -} /* END dasd_3990_erp_examine_24 */ - -/* - * DASD_3990_ERP_EXAMINE_32 - * - * DESCRIPTION - * Checks only for fatal/no/recoverable error. - * A detailed examination of the sense data is done later outside - * the interrupt handler. - * - * RETURN VALUES - * dasd_era_none no error - * dasd_era_fatal for all fatal (unrecoverable errors) - * dasd_era_recover for recoverable others. - */ -static dasd_era_t -dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense) -{ - - struct dasd_device *device = cqr->device; - - switch (sense[25]) { - case 0x00: - return dasd_era_none; - - case 0x01: - DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error"); - - return dasd_era_fatal; - - default: - - return dasd_era_recover; - } - -} /* end dasd_3990_erp_examine_32 */ - -/* - * DASD_3990_ERP_EXAMINE - * - * DESCRIPTION - * Checks only for fatal/no/recover error. - * A detailed examination of the sense data is done later outside - * the interrupt handler. - * - * The logic is based on the 'IBM 3990 Storage Control Reference' manual - * 'Chapter 7. Error Recovery Procedures'. - * - * RETURN VALUES - * dasd_era_none no error - * dasd_era_fatal for all fatal (unrecoverable errors) - * dasd_era_recover for all others. - */ -dasd_era_t -dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb) -{ - - char *sense = irb->ecw; - dasd_era_t era = dasd_era_recover; - struct dasd_device *device = cqr->device; - - /* check for successful execution first */ - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - - /* distinguish between 24 and 32 byte sense data */ - if (sense[27] & DASD_SENSE_BIT_0) { - - era = dasd_3990_erp_examine_24(cqr, sense); - - } else { - - era = dasd_3990_erp_examine_32(cqr, sense); - - } - - /* log the erp chain if fatal error occurred */ - if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) { - dasd_log_sense(cqr, irb); - } - - return era; - -} /* END dasd_3990_erp_examine */ - -/* - ***************************************************************************** * SECTION ERP HANDLING ***************************************************************************** */ @@ -206,7 +54,7 @@ dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) { struct dasd_ccw_req *cqr = erp->refers; - dasd_free_erp_request(erp, erp->device); + dasd_free_erp_request(erp, erp->memdev); cqr->status = final_status; return cqr; @@ -224,15 +72,17 @@ static void dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; + unsigned long flags; DEV_MESSAGE(KERN_INFO, device, "blocking request queue for %is", expires/HZ); + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); device->stopped |= DASD_STOPPED_PENDING; - erp->status = DASD_CQR_QUEUED; - - dasd_set_timer(device, expires); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + erp->status = DASD_CQR_FILLED; + dasd_block_set_timer(device->block, expires); } /* @@ -251,7 +101,7 @@ static struct dasd_ccw_req * dasd_3990_erp_int_req(struct dasd_ccw_req * erp) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without blocking queue */ @@ -292,11 +142,14 @@ dasd_3990_erp_int_req(struct dasd_ccw_req * erp) static void dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; __u8 opm; + unsigned long flags; /* try alternate valid path */ + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); opm = ccw_device_get_path_mask(device->cdev); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); //FIXME: start with get_opm ? if (erp->lpm == 0) erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum); @@ -309,9 +162,8 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) "try alternate lpm=%x (lpum=%x / opm=%x)", erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); - /* reset status to queued to handle the request again... */ - if (erp->status > DASD_CQR_QUEUED) - erp->status = DASD_CQR_QUEUED; + /* reset status to submit the request again... */ + erp->status = DASD_CQR_FILLED; erp->retries = 1; } else { DEV_MESSAGE(KERN_ERR, device, @@ -320,8 +172,7 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) erp->irb.esw.esw0.sublog.lpum, opm); /* post request with permanent error */ - if (erp->status > DASD_CQR_QUEUED) - erp->status = DASD_CQR_FAILED; + erp->status = DASD_CQR_FAILED; } } /* end dasd_3990_erp_alternate_path */ @@ -344,14 +195,14 @@ static struct dasd_ccw_req * dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; struct DCTL_data *DCTL_data; struct ccw1 *ccw; struct dasd_ccw_req *dctl_cqr; dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, - sizeof (struct DCTL_data), - erp->device); + sizeof(struct DCTL_data), + device); if (IS_ERR(dctl_cqr)) { DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate DCTL-CQR"); @@ -365,13 +216,14 @@ dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) DCTL_data->modifier = modifier; ccw = dctl_cqr->cpaddr; - memset(ccw, 0, sizeof (struct ccw1)); + memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = CCW_CMD_DCTL; ccw->count = 4; ccw->cda = (__u32)(addr_t) DCTL_data; dctl_cqr->function = dasd_3990_erp_DCTL; dctl_cqr->refers = erp; - dctl_cqr->device = erp->device; + dctl_cqr->startdev = device; + dctl_cqr->memdev = device; dctl_cqr->magic = erp->magic; dctl_cqr->expires = 5 * 60 * HZ; dctl_cqr->retries = 2; @@ -435,7 +287,7 @@ static struct dasd_ccw_req * dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without waiting for state change pending */ @@ -472,7 +324,7 @@ dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) "redriving request immediately, " "%d retries left", erp->retries); - erp->status = DASD_CQR_QUEUED; + erp->status = DASD_CQR_FILLED; } } @@ -530,7 +382,7 @@ static void dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; char msg_format = (sense[7] & 0xF0); char msg_no = (sense[7] & 0x0F); @@ -1157,7 +1009,7 @@ static struct dasd_ccw_req * dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_com_rej; @@ -1198,7 +1050,7 @@ static struct dasd_ccw_req * dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without blocking queue */ @@ -1237,7 +1089,7 @@ static struct dasd_ccw_req * dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_equip_check; @@ -1279,7 +1131,6 @@ dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) erp = dasd_3990_erp_action_5(erp); } - return erp; } /* end dasd_3990_erp_equip_check */ @@ -1299,7 +1150,7 @@ static struct dasd_ccw_req * dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_data_check; @@ -1358,7 +1209,7 @@ static struct dasd_ccw_req * dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_overrun; @@ -1387,7 +1238,7 @@ static struct dasd_ccw_req * dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_inv_format; @@ -1403,8 +1254,7 @@ dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) } else { DEV_MESSAGE(KERN_ERR, device, "%s", - "Invalid Track Format - Fatal error should have " - "been handled within the interrupt handler"); + "Invalid Track Format - Fatal error"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); } @@ -1428,7 +1278,7 @@ static struct dasd_ccw_req * dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) { - struct dasd_device *device = default_erp->device; + struct dasd_device *device = default_erp->startdev; DEV_MESSAGE(KERN_ERR, device, "%s", "End-of-Cylinder - must never happen"); @@ -1453,7 +1303,7 @@ static struct dasd_ccw_req * dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_env_data; @@ -1463,11 +1313,9 @@ dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) /* don't retry on disabled interface */ if (sense[7] != 0x0F) { - erp = dasd_3990_erp_action_4(erp, sense); } else { - - erp = dasd_3990_erp_cleanup(erp, DASD_CQR_IN_IO); + erp->status = DASD_CQR_FILLED; } return erp; @@ -1490,11 +1338,10 @@ static struct dasd_ccw_req * dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) { - struct dasd_device *device = default_erp->device; + struct dasd_device *device = default_erp->startdev; DEV_MESSAGE(KERN_ERR, device, "%s", - "No Record Found - Fatal error should " - "have been handled within the interrupt handler"); + "No Record Found - Fatal error "); return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); @@ -1517,7 +1364,7 @@ static struct dasd_ccw_req * dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected"); @@ -1526,6 +1373,43 @@ dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) } /* end dasd_3990_erp_file_prot */ /* + * DASD_3990_ERP_INSPECT_ALIAS + * + * DESCRIPTION + * Checks if the original request was started on an alias device. + * If yes, it modifies the original and the erp request so that + * the erp request can be started on a base device. + * + * PARAMETER + * erp pointer to the currently created default ERP + * + * RETURN VALUES + * erp pointer to the modified ERP, or NULL + */ + +static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( + struct dasd_ccw_req *erp) +{ + struct dasd_ccw_req *cqr = erp->refers; + + if (cqr->block && + (cqr->block->base != cqr->startdev)) { + if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { + DEV_MESSAGE(KERN_ERR, cqr->startdev, + "ERP on alias device for request %p," + " recover on base device %s", cqr, + cqr->block->base->cdev->dev.bus_id); + } + dasd_eckd_reset_ccw_to_base_io(cqr); + erp->startdev = cqr->block->base; + erp->function = dasd_3990_erp_inspect_alias; + return erp; + } else + return NULL; +} + + +/* * DASD_3990_ERP_INSPECT_24 * * DESCRIPTION @@ -1623,7 +1507,7 @@ static struct dasd_ccw_req * dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->retries = 256; erp->function = dasd_3990_erp_action_10_32; @@ -1657,13 +1541,14 @@ static struct dasd_ccw_req * dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) { - struct dasd_device *device = default_erp->device; + struct dasd_device *device = default_erp->startdev; __u32 cpa = 0; struct dasd_ccw_req *cqr; struct dasd_ccw_req *erp; struct DE_eckd_data *DE_data; + struct PFX_eckd_data *PFX_data; char *LO_data; /* LO_eckd_data_t */ - struct ccw1 *ccw; + struct ccw1 *ccw, *oldccw; DEV_MESSAGE(KERN_DEBUG, device, "%s", "Write not finished because of unexpected condition"); @@ -1702,8 +1587,8 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) /* Build new ERP request including DE/LO */ erp = dasd_alloc_erp_request((char *) &cqr->magic, 2 + 1,/* DE/LO + TIC */ - sizeof (struct DE_eckd_data) + - sizeof (struct LO_eckd_data), device); + sizeof(struct DE_eckd_data) + + sizeof(struct LO_eckd_data), device); if (IS_ERR(erp)) { DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP"); @@ -1712,10 +1597,16 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) /* use original DE */ DE_data = erp->data; - memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data)); + oldccw = cqr->cpaddr; + if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { + PFX_data = cqr->data; + memcpy(DE_data, &PFX_data->define_extend, + sizeof(struct DE_eckd_data)); + } else + memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); /* create LO */ - LO_data = erp->data + sizeof (struct DE_eckd_data); + LO_data = erp->data + sizeof(struct DE_eckd_data); if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { @@ -1748,7 +1639,7 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) /* create DE ccw */ ccw = erp->cpaddr; - memset(ccw, 0, sizeof (struct ccw1)); + memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; ccw->flags = CCW_FLAG_CC; ccw->count = 16; @@ -1756,7 +1647,7 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) /* create LO ccw */ ccw++; - memset(ccw, 0, sizeof (struct ccw1)); + memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; ccw->flags = CCW_FLAG_CC; ccw->count = 16; @@ -1770,7 +1661,8 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) /* fill erp related fields */ erp->function = dasd_3990_erp_action_1B_32; erp->refers = default_erp->refers; - erp->device = device; + erp->startdev = device; + erp->memdev = device; erp->magic = default_erp->magic; erp->expires = 0; erp->retries = 256; @@ -1803,7 +1695,7 @@ static struct dasd_ccw_req * dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) { - struct dasd_device *device = previous_erp->device; + struct dasd_device *device = previous_erp->startdev; __u32 cpa = 0; struct dasd_ccw_req *cqr; struct dasd_ccw_req *erp; @@ -1827,7 +1719,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) DEV_MESSAGE(KERN_DEBUG, device, "%s", "Imprecise ending is set - just retry"); - previous_erp->status = DASD_CQR_QUEUED; + previous_erp->status = DASD_CQR_FILLED; return previous_erp; } @@ -1850,7 +1742,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) erp = previous_erp; /* update the LO with the new returned sense data */ - LO_data = erp->data + sizeof (struct DE_eckd_data); + LO_data = erp->data + sizeof(struct DE_eckd_data); if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { @@ -1889,7 +1781,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) ccw++; /* addr of TIC ccw */ ccw->cda = cpa; - erp->status = DASD_CQR_QUEUED; + erp->status = DASD_CQR_FILLED; return erp; @@ -1968,9 +1860,7 @@ dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) * try further actions. */ erp->lpm = 0; - - erp->status = DASD_CQR_ERROR; - + erp->status = DASD_CQR_NEED_ERP; } } @@ -2047,7 +1937,7 @@ dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { /* set to suspended duplex state then restart */ - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; DEV_MESSAGE(KERN_ERR, device, "%s", "Set device to suspended duplex state should be " @@ -2081,28 +1971,26 @@ dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) { if ((erp->function == dasd_3990_erp_compound_retry) && - (erp->status == DASD_CQR_ERROR)) { + (erp->status == DASD_CQR_NEED_ERP)) { dasd_3990_erp_compound_path(erp, sense); } if ((erp->function == dasd_3990_erp_compound_path) && - (erp->status == DASD_CQR_ERROR)) { + (erp->status == DASD_CQR_NEED_ERP)) { erp = dasd_3990_erp_compound_code(erp, sense); } if ((erp->function == dasd_3990_erp_compound_code) && - (erp->status == DASD_CQR_ERROR)) { + (erp->status == DASD_CQR_NEED_ERP)) { dasd_3990_erp_compound_config(erp, sense); } /* if no compound action ERP specified, the request failed */ - if (erp->status == DASD_CQR_ERROR) { - + if (erp->status == DASD_CQR_NEED_ERP) erp->status = DASD_CQR_FAILED; - } return erp; @@ -2127,7 +2015,7 @@ static struct dasd_ccw_req * dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_inspect_32; @@ -2149,8 +2037,7 @@ dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) case 0x01: /* fatal error */ DEV_MESSAGE(KERN_ERR, device, "%s", - "Fatal error should have been " - "handled within the interrupt handler"); + "Retry not recommended - Fatal error"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); break; @@ -2253,6 +2140,11 @@ dasd_3990_erp_inspect(struct dasd_ccw_req * erp) /* already set up new ERP ! */ char *sense = erp->refers->irb.ecw; + /* if this problem occured on an alias retry on base */ + erp_new = dasd_3990_erp_inspect_alias(erp); + if (erp_new) + return erp_new; + /* distinguish between 24 and 32 byte sense data */ if (sense[27] & DASD_SENSE_BIT_0) { @@ -2287,13 +2179,13 @@ static struct dasd_ccw_req * dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) { - struct dasd_device *device = cqr->device; + struct dasd_device *device = cqr->startdev; struct ccw1 *ccw; /* allocate additional request block */ struct dasd_ccw_req *erp; - erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device); + erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, device); if (IS_ERR(erp)) { if (cqr->retries <= 0) { DEV_MESSAGE(KERN_ERR, device, "%s", @@ -2305,7 +2197,7 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) "Unable to allocate ERP request " "(%i retries left)", cqr->retries); - dasd_set_timer(device, (HZ << 3)); + dasd_block_set_timer(device->block, (HZ << 3)); } return cqr; } @@ -2319,7 +2211,9 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) ccw->cda = (long)(cqr->cpaddr); erp->function = dasd_3990_erp_add_erp; erp->refers = cqr; - erp->device = cqr->device; + erp->startdev = device; + erp->memdev = device; + erp->block = cqr->block; erp->magic = cqr->magic; erp->expires = 0; erp->retries = 256; @@ -2466,7 +2360,7 @@ static struct dasd_ccw_req * dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) { - struct dasd_device *device = erp->device; + struct dasd_device *device = erp->startdev; char *sense = erp->irb.ecw; /* check for 24 byte sense ERP */ @@ -2557,7 +2451,7 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, struct dasd_ccw_req *erp) { - struct dasd_device *device = erp_head->device; + struct dasd_device *device = erp_head->startdev; struct dasd_ccw_req *erp_done = erp_head; /* finished req */ struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ @@ -2569,13 +2463,13 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, "original request was lost\n"); /* remove the request from the device queue */ - list_del(&erp_done->list); + list_del(&erp_done->blocklist); erp_free = erp_done; erp_done = erp_done->refers; /* free the finished erp request */ - dasd_free_erp_request(erp_free, erp_free->device); + dasd_free_erp_request(erp_free, erp_free->memdev); } /* end while */ @@ -2603,7 +2497,7 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, erp->retries, erp); /* handle the request again... */ - erp->status = DASD_CQR_QUEUED; + erp->status = DASD_CQR_FILLED; } } else { @@ -2620,7 +2514,7 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, * DASD_3990_ERP_ACTION * * DESCRIPTION - * controll routine for 3990 erp actions. + * control routine for 3990 erp actions. * Has to be called with the queue lock (namely the s390_irq_lock) acquired. * * PARAMETER @@ -2636,9 +2530,8 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, struct dasd_ccw_req * dasd_3990_erp_action(struct dasd_ccw_req * cqr) { - struct dasd_ccw_req *erp = NULL; - struct dasd_device *device = cqr->device; + struct dasd_device *device = cqr->startdev; struct dasd_ccw_req *temp_erp = NULL; if (device->features & DASD_FEATURE_ERPLOG) { @@ -2704,10 +2597,11 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr) } } - /* enqueue added ERP request */ - if (erp->status == DASD_CQR_FILLED) { - erp->status = DASD_CQR_QUEUED; - list_add(&erp->list, &device->ccw_queue); + /* enqueue ERP request if it's a new one */ + if (list_empty(&erp->blocklist)) { + cqr->status = DASD_CQR_IN_ERP; + /* add erp request before the cqr */ + list_add_tail(&erp->blocklist, &cqr->blocklist); } return erp; diff --git a/drivers/s390/block/dasd_9336_erp.c b/drivers/s390/block/dasd_9336_erp.c deleted file mode 100644 index 6e08268..0000000 --- a/drivers/s390/block/dasd_9336_erp.c +++ /dev/null @@ -1,41 +0,0 @@ -/* - * File...........: linux/drivers/s390/block/dasd_9336_erp.c - * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> - * Bugreports.to..: <Linux390@de.ibm.com> - * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000 - * - */ - -#define PRINTK_HEADER "dasd_erp(9336)" - -#include "dasd_int.h" - - -/* - * DASD_9336_ERP_EXAMINE - * - * DESCRIPTION - * Checks only for fatal/no/recover error. - * A detailed examination of the sense data is done later outside - * the interrupt handler. - * - * The logic is based on the 'IBM 3880 Storage Control Reference' manual - * 'Chapter 7. 9336 Sense Data'. - * - * RETURN VALUES - * dasd_era_none no error - * dasd_era_fatal for all fatal (unrecoverable errors) - * dasd_era_recover for all others. - */ -dasd_era_t -dasd_9336_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb) -{ - /* check for successful execution first */ - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - - /* examine the 24 byte sense data */ - return dasd_era_recover; - -} /* END dasd_9336_erp_examine */ diff --git a/drivers/s390/block/dasd_9343_erp.c b/drivers/s390/block/dasd_9343_erp.c deleted file mode 100644 index ddecb98..0000000 --- a/drivers/s390/block/dasd_9343_erp.c +++ /dev/null @@ -1,21 +0,0 @@ -/* - * File...........: linux/drivers/s390/block/dasd_9345_erp.c - * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> - * Bugreports.to..: <Linux390@de.ibm.com> - * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000 - * - */ - -#define PRINTK_HEADER "dasd_erp(9343)" - -#include "dasd_int.h" - -dasd_era_t -dasd_9343_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb) -{ - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - - return dasd_era_recover; -} diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c new file mode 100644 index 0000000..3a40bee --- /dev/null +++ b/drivers/s390/block/dasd_alias.c @@ -0,0 +1,903 @@ +/* + * PAV alias management for the DASD ECKD discipline + * + * Copyright IBM Corporation, 2007 + * Author(s): Stefan Weinhuber <wein@de.ibm.com> + */ + +#include <linux/list.h> +#include <asm/ebcdic.h> +#include "dasd_int.h" +#include "dasd_eckd.h" + +#ifdef PRINTK_HEADER +#undef PRINTK_HEADER +#endif /* PRINTK_HEADER */ +#define PRINTK_HEADER "dasd(eckd):" + + +/* + * General concept of alias management: + * - PAV and DASD alias management is specific to the eckd discipline. + * - A device is connected to an lcu as long as the device exists. + * dasd_alias_make_device_known_to_lcu will be called wenn the + * device is checked by the eckd discipline and + * dasd_alias_disconnect_device_from_lcu will be called + * before the device is deleted. + * - The dasd_alias_add_device / dasd_alias_remove_device + * functions mark the point when a device is 'ready for service'. + * - A summary unit check is a rare occasion, but it is mandatory to + * support it. It requires some complex recovery actions before the + * devices can be used again (see dasd_alias_handle_summary_unit_check). + * - dasd_alias_get_start_dev will find an alias device that can be used + * instead of the base device and does some (very simple) load balancing. + * This is the function that gets called for each I/O, so when improving + * something, this function should get faster or better, the rest has just + * to be correct. + */ + + +static void summary_unit_check_handling_work(struct work_struct *); +static void lcu_update_work(struct work_struct *); +static int _schedule_lcu_update(struct alias_lcu *, struct dasd_device *); + +static struct alias_root aliastree = { + .serverlist = LIST_HEAD_INIT(aliastree.serverlist), + .lock = __SPIN_LOCK_UNLOCKED(aliastree.lock), +}; + +static struct alias_server *_find_server(struct dasd_uid *uid) +{ + struct alias_server *pos; + list_for_each_entry(pos, &aliastree.serverlist, server) { + if (!strncmp(pos->uid.vendor, uid->vendor, + sizeof(uid->vendor)) + && !strncmp(pos->uid.serial, uid->serial, + sizeof(uid->serial))) + return pos; + }; + return NULL; +} + +static struct alias_lcu *_find_lcu(struct alias_server *server, + struct dasd_uid *uid) +{ + struct alias_lcu *pos; + list_for_each_entry(pos, &server->lculist, lcu) { + if (pos->uid.ssid == uid->ssid) + return pos; + }; + return NULL; +} + +static struct alias_pav_group *_find_group(struct alias_lcu *lcu, + struct dasd_uid *uid) +{ + struct alias_pav_group *pos; + __u8 search_unit_addr; + + /* for hyper pav there is only one group */ + if (lcu->pav == HYPER_PAV) { + if (list_empty(&lcu->grouplist)) + return NULL; + else + return list_first_entry(&lcu->grouplist, + struct alias_pav_group, group); + } + + /* for base pav we have to find the group that matches the base */ + if (uid->type == UA_BASE_DEVICE) + search_unit_addr = uid->real_unit_addr; + else + search_unit_addr = uid->base_unit_addr; + list_for_each_entry(pos, &lcu->grouplist, group) { + if (pos->uid.base_unit_addr == search_unit_addr) + return pos; + }; + return NULL; +} + +static struct alias_server *_allocate_server(struct dasd_uid *uid) +{ + struct alias_server *server; + + server = kzalloc(sizeof(*server), GFP_KERNEL); + if (!server) + return ERR_PTR(-ENOMEM); + memcpy(server->uid.vendor, uid->vendor, sizeof(uid->vendor)); + memcpy(server->uid.serial, uid->serial, sizeof(uid->serial)); + INIT_LIST_HEAD(&server->server); + INIT_LIST_HEAD(&server->lculist); + return server; +} + +static void _free_server(struct alias_server *server) +{ + kfree(server); +} + +static struct alias_lcu *_allocate_lcu(struct dasd_uid *uid) +{ + struct alias_lcu *lcu; + + lcu = kzalloc(sizeof(*lcu), GFP_KERNEL); + if (!lcu) + return ERR_PTR(-ENOMEM); + lcu->uac = kzalloc(sizeof(*(lcu->uac)), GFP_KERNEL | GFP_DMA); + if (!lcu->uac) + goto out_err1; + lcu->rsu_cqr = kzalloc(sizeof(*lcu->rsu_cqr), GFP_KERNEL | GFP_DMA); + if (!lcu->rsu_cqr) + goto out_err2; + lcu->rsu_cqr->cpaddr = kzalloc(sizeof(struct ccw1), + GFP_KERNEL | GFP_DMA); + if (!lcu->rsu_cqr->cpaddr) + goto out_err3; + lcu->rsu_cqr->data = kzalloc(16, GFP_KERNEL | GFP_DMA); + if (!lcu->rsu_cqr->data) + goto out_err4; + + memcpy(lcu->uid.vendor, uid->vendor, sizeof(uid->vendor)); + memcpy(lcu->uid.serial, uid->serial, sizeof(uid->serial)); + lcu->uid.ssid = uid->ssid; + lcu->pav = NO_PAV; + lcu->flags = NEED_UAC_UPDATE | UPDATE_PENDING; + INIT_LIST_HEAD(&lcu->lcu); + INIT_LIST_HEAD(&lcu->inactive_devices); + INIT_LIST_HEAD(&lcu->active_devices); + INIT_LIST_HEAD(&lcu->grouplist); + INIT_WORK(&lcu->suc_data.worker, summary_unit_check_handling_work); + INIT_DELAYED_WORK(&lcu->ruac_data.dwork, lcu_update_work); + spin_lock_init(&lcu->lock); + return lcu; + +out_err4: + kfree(lcu->rsu_cqr->cpaddr); +out_err3: + kfree(lcu->rsu_cqr); +out_err2: + kfree(lcu->uac); +out_err1: + kfree(lcu); + return ERR_PTR(-ENOMEM); +} + +static void _free_lcu(struct alias_lcu *lcu) +{ + kfree(lcu->rsu_cqr->data); + kfree(lcu->rsu_cqr->cpaddr); + kfree(lcu->rsu_cqr); + kfree(lcu->uac); + kfree(lcu); +} + +/* + * This is the function that will allocate all the server and lcu data, + * so this function must be called first for a new device. + * If the return value is 1, the lcu was already known before, if it + * is 0, this is a new lcu. + * Negative return code indicates that something went wrong (e.g. -ENOMEM) + */ +int dasd_alias_make_device_known_to_lcu(struct dasd_device *device) +{ + struct dasd_eckd_private *private; + unsigned long flags; + struct alias_server *server, *newserver; + struct alias_lcu *lcu, *newlcu; + int is_lcu_known; + struct dasd_uid *uid; + + private = (struct dasd_eckd_private *) device->private; + uid = &private->uid; + spin_lock_irqsave(&aliastree.lock, flags); + is_lcu_known = 1; + server = _find_server(uid); + if (!server) { + spin_unlock_irqrestore(&aliastree.lock, flags); + newserver = _allocate_server(uid); + if (IS_ERR(newserver)) + return PTR_ERR(newserver); + spin_lock_irqsave(&aliastree.lock, flags); + server = _find_server(uid); + if (!server) { + list_add(&newserver->server, &aliastree.serverlist); + server = newserver; + is_lcu_known = 0; + } else { + /* someone was faster */ + _free_server(newserver); + } + } + + lcu = _find_lcu(server, uid); + if (!lcu) { + spin_unlock_irqrestore(&aliastree.lock, flags); + newlcu = _allocate_lcu(uid); + if (IS_ERR(newlcu)) + return PTR_ERR(lcu); + spin_lock_irqsave(&aliastree.lock, flags); + lcu = _find_lcu(server, uid); + if (!lcu) { + list_add(&newlcu->lcu, &server->lculist); + lcu = newlcu; + is_lcu_known = 0; + } else { + /* someone was faster */ + _free_lcu(newlcu); + } + is_lcu_known = 0; + } + spin_lock(&lcu->lock); + list_add(&device->alias_list, &lcu->inactive_devices); + private->lcu = lcu; + spin_unlock(&lcu->lock); + spin_unlock_irqrestore(&aliastree.lock, flags); + + return is_lcu_known; +} + +/* + * This function removes a device from the scope of alias management. + * The complicated part is to make sure that it is not in use by + * any of the workers. If necessary cancel the work. + */ +void dasd_alias_disconnect_device_from_lcu(struct dasd_device *device) +{ + struct dasd_eckd_private *private; + unsigned long flags; + struct alias_lcu *lcu; + struct alias_server *server; + int was_pending; + + private = (struct dasd_eckd_private *) device->private; + lcu = private->lcu; + spin_lock_irqsave(&lcu->lock, flags); + list_del_init(&device->alias_list); + /* make sure that the workers don't use this device */ + if (device == lcu->suc_data.device) { + spin_unlock_irqrestore(&lcu->lock, flags); + cancel_work_sync(&lcu->suc_data.worker); + spin_lock_irqsave(&lcu->lock, flags); + if (device == lcu->suc_data.device) + lcu->suc_data.device = NULL; + } + was_pending = 0; + if (device == lcu->ruac_data.device) { + spin_unlock_irqrestore(&lcu->lock, flags); + was_pending = 1; + cancel_delayed_work_sync(&lcu->ruac_data.dwork); + spin_lock_irqsave(&lcu->lock, flags); + if (device == lcu->ruac_data.device) + lcu->ruac_data.device = NULL; + } + private->lcu = NULL; + spin_unlock_irqrestore(&lcu->lock, flags); + + spin_lock_irqsave(&aliastree.lock, flags); + spin_lock(&lcu->lock); + if (list_empty(&lcu->grouplist) && + list_empty(&lcu->active_devices) && + list_empty(&lcu->inactive_devices)) { + list_del(&lcu->lcu); + spin_unlock(&lcu->lock); + _free_lcu(lcu); + lcu = NULL; + } else { + if (was_pending) + _schedule_lcu_update(lcu, NULL); + spin_unlock(&lcu->lock); + } + server = _find_server(&private->uid); + if (server && list_empty(&server->lculist)) { + list_del(&server->server); + _free_server(server); + } + spin_unlock_irqrestore(&aliastree.lock, flags); +} + +/* + * This function assumes that the unit address configuration stored + * in the lcu is up to date and will update the device uid before + * adding it to a pav group. + */ +static int _add_device_to_lcu(struct alias_lcu *lcu, + struct dasd_device *device) +{ + + struct dasd_eckd_private *private; + struct alias_pav_group *group; + struct dasd_uid *uid; + + private = (struct dasd_eckd_private *) device->private; + uid = &private->uid; + uid->type = lcu->uac->unit[uid->real_unit_addr].ua_type; + uid->base_unit_addr = lcu->uac->unit[uid->real_unit_addr].base_ua; + dasd_set_uid(device->cdev, &private->uid); + + /* if we have no PAV anyway, we don't need to bother with PAV groups */ + if (lcu->pav == NO_PAV) { + list_move(&device->alias_list, &lcu->active_devices); + return 0; + } + + group = _find_group(lcu, uid); + if (!group) { + group = kzalloc(sizeof(*group), GFP_ATOMIC); + if (!group) + return -ENOMEM; + memcpy(group->uid.vendor, uid->vendor, sizeof(uid->vendor)); + memcpy(group->uid.serial, uid->serial, sizeof(uid->serial)); + group->uid.ssid = uid->ssid; + if (uid->type == UA_BASE_DEVICE) + group->uid.base_unit_addr = uid->real_unit_addr; + else + group->uid.base_unit_addr = uid->base_unit_addr; + INIT_LIST_HEAD(&group->group); + INIT_LIST_HEAD(&group->baselist); + INIT_LIST_HEAD(&group->aliaslist); + list_add(&group->group, &lcu->grouplist); + } + if (uid->type == UA_BASE_DEVICE) + list_move(&device->alias_list, &group->baselist); + else + list_move(&device->alias_list, &group->aliaslist); + private->pavgroup = group; + return 0; +}; + +static void _remove_device_from_lcu(struct alias_lcu *lcu, + struct dasd_device *device) +{ + struct dasd_eckd_private *private; + struct alias_pav_group *group; + + private = (struct dasd_eckd_private *) device->private; + list_move(&device->alias_list, &lcu->inactive_devices); + group = private->pavgroup; + if (!group) + return; + private->pavgroup = NULL; + if (list_empty(&group->baselist) && list_empty(&group->aliaslist)) { + list_del(&group->group); + kfree(group); + return; + } + if (group->next == device) + group->next = NULL; +}; + +static int read_unit_address_configuration(struct dasd_device *device, + struct alias_lcu *lcu) +{ + struct dasd_psf_prssd_data *prssdp; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + unsigned long flags; + + cqr = dasd_kmalloc_request("ECKD", + 1 /* PSF */ + 1 /* RSSD */ , + (sizeof(struct dasd_psf_prssd_data)), + device); + if (IS_ERR(cqr)) + return PTR_ERR(cqr); + cqr->startdev = device; + cqr->memdev = device; + clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + cqr->retries = 10; + cqr->expires = 20 * HZ; + + /* Prepare for Read Subsystem Data */ + prssdp = (struct dasd_psf_prssd_data *) cqr->data; + memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); + prssdp->order = PSF_ORDER_PRSSD; + prssdp->suborder = 0x0e; /* Read unit address configuration */ + /* all other bytes of prssdp must be zero */ + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = sizeof(struct dasd_psf_prssd_data); + ccw->flags |= CCW_FLAG_CC; + ccw->cda = (__u32)(addr_t) prssdp; + + /* Read Subsystem Data - feature codes */ + memset(lcu->uac, 0, sizeof(*(lcu->uac))); + + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(*(lcu->uac)); + ccw->cda = (__u32)(addr_t) lcu->uac; + + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + + /* need to unset flag here to detect race with summary unit check */ + spin_lock_irqsave(&lcu->lock, flags); + lcu->flags &= ~NEED_UAC_UPDATE; + spin_unlock_irqrestore(&lcu->lock, flags); + + do { + rc = dasd_sleep_on(cqr); + } while (rc && (cqr->retries > 0)); + if (rc) { + spin_lock_irqsave(&lcu->lock, flags); + lcu->flags |= NEED_UAC_UPDATE; + spin_unlock_irqrestore(&lcu->lock, flags); + } + dasd_kfree_request(cqr, cqr->memdev); + return rc; +} + +static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu) +{ + unsigned long flags; + struct alias_pav_group *pavgroup, *tempgroup; + struct dasd_device *device, *tempdev; + int i, rc; + struct dasd_eckd_private *private; + + spin_lock_irqsave(&lcu->lock, flags); + list_for_each_entry_safe(pavgroup, tempgroup, &lcu->grouplist, group) { + list_for_each_entry_safe(device, tempdev, &pavgroup->baselist, + alias_list) { + list_move(&device->alias_list, &lcu->active_devices); + private = (struct dasd_eckd_private *) device->private; + private->pavgroup = NULL; + } + list_for_each_entry_safe(device, tempdev, &pavgroup->aliaslist, + alias_list) { + list_move(&device->alias_list, &lcu->active_devices); + private = (struct dasd_eckd_private *) device->private; + private->pavgroup = NULL; + } + list_del(&pavgroup->group); + kfree(pavgroup); + } + spin_unlock_irqrestore(&lcu->lock, flags); + + rc = read_unit_address_configuration(refdev, lcu); + if (rc) + return rc; + + spin_lock_irqsave(&lcu->lock, flags); + lcu->pav = NO_PAV; + for (i = 0; i < MAX_DEVICES_PER_LCU; ++i) { + switch (lcu->uac->unit[i].ua_type) { + case UA_BASE_PAV_ALIAS: + lcu->pav = BASE_PAV; + break; + case UA_HYPER_PAV_ALIAS: + lcu->pav = HYPER_PAV; + break; + } + if (lcu->pav != NO_PAV) + break; + } + + list_for_each_entry_safe(device, tempdev, &lcu->active_devices, + alias_list) { + _add_device_to_lcu(lcu, device); + } + spin_unlock_irqrestore(&lcu->lock, flags); + return 0; +} + +static void lcu_update_work(struct work_struct *work) +{ + struct alias_lcu *lcu; + struct read_uac_work_data *ruac_data; + struct dasd_device *device; + unsigned long flags; + int rc; + + ruac_data = container_of(work, struct read_uac_work_data, dwork.work); + lcu = container_of(ruac_data, struct alias_lcu, ruac_data); + device = ruac_data->device; + rc = _lcu_update(device, lcu); + /* + * Need to check flags again, as there could have been another + * prepare_update or a new device a new device while we were still + * processing the data + */ + spin_lock_irqsave(&lcu->lock, flags); + if (rc || (lcu->flags & NEED_UAC_UPDATE)) { + DEV_MESSAGE(KERN_WARNING, device, "could not update" + " alias data in lcu (rc = %d), retry later", rc); + schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ); + } else { + lcu->ruac_data.device = NULL; + lcu->flags &= ~UPDATE_PENDING; + } + spin_unlock_irqrestore(&lcu->lock, flags); +} + +static int _schedule_lcu_update(struct alias_lcu *lcu, + struct dasd_device *device) +{ + struct dasd_device *usedev = NULL; + struct alias_pav_group *group; + + lcu->flags |= NEED_UAC_UPDATE; + if (lcu->ruac_data.device) { + /* already scheduled or running */ + return 0; + } + if (device && !list_empty(&device->alias_list)) + usedev = device; + + if (!usedev && !list_empty(&lcu->grouplist)) { + group = list_first_entry(&lcu->grouplist, + struct alias_pav_group, group); + if (!list_empty(&group->baselist)) + usedev = list_first_entry(&group->baselist, + struct dasd_device, + alias_list); + else if (!list_empty(&group->aliaslist)) + usedev = list_first_entry(&group->aliaslist, + struct dasd_device, + alias_list); + } + if (!usedev && !list_empty(&lcu->active_devices)) { + usedev = list_first_entry(&lcu->active_devices, + struct dasd_device, alias_list); + } + /* + * if we haven't found a proper device yet, give up for now, the next + * device that will be set active will trigger an lcu update + */ + if (!usedev) + return -EINVAL; + lcu->ruac_data.device = usedev; + schedule_delayed_work(&lcu->ruac_data.dwork, 0); + return 0; +} + +int dasd_alias_add_device(struct dasd_device *device) +{ + struct dasd_eckd_private *private; + struct alias_lcu *lcu; + unsigned long flags; + int rc; + + private = (struct dasd_eckd_private *) device->private; + lcu = private->lcu; + rc = 0; + spin_lock_irqsave(&lcu->lock, flags); + if (!(lcu->flags & UPDATE_PENDING)) { + rc = _add_device_to_lcu(lcu, device); + if (rc) + lcu->flags |= UPDATE_PENDING; + } + if (lcu->flags & UPDATE_PENDING) { + list_move(&device->alias_list, &lcu->active_devices); + _schedule_lcu_update(lcu, device); + } + spin_unlock_irqrestore(&lcu->lock, flags); + return rc; +} + +int dasd_alias_remove_device(struct dasd_device *device) +{ + struct dasd_eckd_private *private; + struct alias_lcu *lcu; + unsigned long flags; + + private = (struct dasd_eckd_private *) device->private; + lcu = private->lcu; + spin_lock_irqsave(&lcu->lock, flags); + _remove_device_from_lcu(lcu, device); + spin_unlock_irqrestore(&lcu->lock, flags); + return 0; +} + +struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device) +{ + + struct dasd_device *alias_device; + struct alias_pav_group *group; + struct alias_lcu *lcu; + struct dasd_eckd_private *private, *alias_priv; + unsigned long flags; + + private = (struct dasd_eckd_private *) base_device->private; + group = private->pavgroup; + lcu = private->lcu; + if (!group || !lcu) + return NULL; + if (lcu->pav == NO_PAV || + lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING)) + return NULL; + + spin_lock_irqsave(&lcu->lock, flags); + alias_device = group->next; + if (!alias_device) { + if (list_empty(&group->aliaslist)) { + spin_unlock_irqrestore(&lcu->lock, flags); + return NULL; + } else { + alias_device = list_first_entry(&group->aliaslist, + struct dasd_device, + alias_list); + } + } + if (list_is_last(&alias_device->alias_list, &group->aliaslist)) + group->next = list_first_entry(&group->aliaslist, + struct dasd_device, alias_list); + else + group->next = list_first_entry(&alias_device->alias_list, + struct dasd_device, alias_list); + spin_unlock_irqrestore(&lcu->lock, flags); + alias_priv = (struct dasd_eckd_private *) alias_device->private; + if ((alias_priv->count < private->count) && !alias_device->stopped) + return alias_device; + else + return NULL; +} + +/* + * Summary unit check handling depends on the way alias devices + * are handled so it is done here rather then in dasd_eckd.c + */ +static int reset_summary_unit_check(struct alias_lcu *lcu, + struct dasd_device *device, + char reason) +{ + struct dasd_ccw_req *cqr; + int rc = 0; + + cqr = lcu->rsu_cqr; + strncpy((char *) &cqr->magic, "ECKD", 4); + ASCEBC((char *) &cqr->magic, 4); + cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RSCK; + cqr->cpaddr->flags = 0 ; + cqr->cpaddr->count = 16; + cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; + ((char *)cqr->data)[0] = reason; + + clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + cqr->retries = 255; /* set retry counter to enable basic ERP */ + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->expires = 5 * HZ; + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + + rc = dasd_sleep_on_immediatly(cqr); + return rc; +} + +static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu) +{ + struct alias_pav_group *pavgroup; + struct dasd_device *device; + struct dasd_eckd_private *private; + + /* active and inactive list can contain alias as well as base devices */ + list_for_each_entry(device, &lcu->active_devices, alias_list) { + private = (struct dasd_eckd_private *) device->private; + if (private->uid.type != UA_BASE_DEVICE) + continue; + dasd_schedule_block_bh(device->block); + dasd_schedule_device_bh(device); + } + list_for_each_entry(device, &lcu->inactive_devices, alias_list) { + private = (struct dasd_eckd_private *) device->private; + if (private->uid.type != UA_BASE_DEVICE) + continue; + dasd_schedule_block_bh(device->block); + dasd_schedule_device_bh(device); + } + list_for_each_entry(pavgroup, &lcu->grouplist, group) { + list_for_each_entry(device, &pavgroup->baselist, alias_list) { + dasd_schedule_block_bh(device->block); + dasd_schedule_device_bh(device); + } + } +} + +static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu) +{ + struct alias_pav_group *pavgroup; + struct dasd_device *device, *temp; + struct dasd_eckd_private *private; + int rc; + unsigned long flags; + LIST_HEAD(active); + + /* + * Problem here ist that dasd_flush_device_queue may wait + * for termination of a request to complete. We can't keep + * the lcu lock during that time, so we must assume that + * the lists may have changed. + * Idea: first gather all active alias devices in a separate list, + * then flush the first element of this list unlocked, and afterwards + * check if it is still on the list before moving it to the + * active_devices list. + */ + + spin_lock_irqsave(&lcu->lock, flags); + list_for_each_entry_safe(device, temp, &lcu->active_devices, + alias_list) { + private = (struct dasd_eckd_private *) device->private; + if (private->uid.type == UA_BASE_DEVICE) + continue; + list_move(&device->alias_list, &active); + } + + list_for_each_entry(pavgroup, &lcu->grouplist, group) { + list_splice_init(&pavgroup->aliaslist, &active); + } + while (!list_empty(&active)) { + device = list_first_entry(&active, struct dasd_device, + alias_list); + spin_unlock_irqrestore(&lcu->lock, flags); + rc = dasd_flush_device_queue(device); + spin_lock_irqsave(&lcu->lock, flags); + /* + * only move device around if it wasn't moved away while we + * were waiting for the flush + */ + if (device == list_first_entry(&active, + struct dasd_device, alias_list)) + list_move(&device->alias_list, &lcu->active_devices); + } + spin_unlock_irqrestore(&lcu->lock, flags); +} + +/* + * This function is called in interrupt context, so the + * cdev lock for device is already locked! + */ +static void _stop_all_devices_on_lcu(struct alias_lcu *lcu, + struct dasd_device *device) +{ + struct alias_pav_group *pavgroup; + struct dasd_device *pos; + + list_for_each_entry(pos, &lcu->active_devices, alias_list) { + if (pos != device) + spin_lock(get_ccwdev_lock(pos->cdev)); + pos->stopped |= DASD_STOPPED_SU; + if (pos != device) + spin_unlock(get_ccwdev_lock(pos->cdev)); + } + list_for_each_entry(pos, &lcu->inactive_devices, alias_list) { + if (pos != device) + spin_lock(get_ccwdev_lock(pos->cdev)); + pos->stopped |= DASD_STOPPED_SU; + if (pos != device) + spin_unlock(get_ccwdev_lock(pos->cdev)); + } + list_for_each_entry(pavgroup, &lcu->grouplist, group) { + list_for_each_entry(pos, &pavgroup->baselist, alias_list) { + if (pos != device) + spin_lock(get_ccwdev_lock(pos->cdev)); + pos->stopped |= DASD_STOPPED_SU; + if (pos != device) + spin_unlock(get_ccwdev_lock(pos->cdev)); + } + list_for_each_entry(pos, &pavgroup->aliaslist, alias_list) { + if (pos != device) + spin_lock(get_ccwdev_lock(pos->cdev)); + pos->stopped |= DASD_STOPPED_SU; + if (pos != device) + spin_unlock(get_ccwdev_lock(pos->cdev)); + } + } +} + +static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu) +{ + struct alias_pav_group *pavgroup; + struct dasd_device *device; + unsigned long flags; + + list_for_each_entry(device, &lcu->active_devices, alias_list) { + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + device->stopped &= ~DASD_STOPPED_SU; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + } + + list_for_each_entry(device, &lcu->inactive_devices, alias_list) { + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + device->stopped &= ~DASD_STOPPED_SU; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + } + + list_for_each_entry(pavgroup, &lcu->grouplist, group) { + list_for_each_entry(device, &pavgroup->baselist, alias_list) { + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + device->stopped &= ~DASD_STOPPED_SU; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), + flags); + } + list_for_each_entry(device, &pavgroup->aliaslist, alias_list) { + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + device->stopped &= ~DASD_STOPPED_SU; + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), + flags); + } + } +} + +static void summary_unit_check_handling_work(struct work_struct *work) +{ + struct alias_lcu *lcu; + struct summary_unit_check_work_data *suc_data; + unsigned long flags; + struct dasd_device *device; + + suc_data = container_of(work, struct summary_unit_check_work_data, + worker); + lcu = container_of(suc_data, struct alias_lcu, suc_data); + device = suc_data->device; + + /* 1. flush alias devices */ + flush_all_alias_devices_on_lcu(lcu); + + /* 2. reset summary unit check */ + spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); + device->stopped &= ~(DASD_STOPPED_SU | DASD_STOPPED_PENDING); + spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + reset_summary_unit_check(lcu, device, suc_data->reason); + + spin_lock_irqsave(&lcu->lock, flags); + _unstop_all_devices_on_lcu(lcu); + _restart_all_base_devices_on_lcu(lcu); + /* 3. read new alias configuration */ + _schedule_lcu_update(lcu, device); + lcu->suc_data.device = NULL; + spin_unlock_irqrestore(&lcu->lock, flags); +} + +/* + * note: this will be called from int handler context (cdev locked) + */ +void dasd_alias_handle_summary_unit_check(struct dasd_device *device, + struct irb *irb) +{ + struct alias_lcu *lcu; + char reason; + struct dasd_eckd_private *private; + + private = (struct dasd_eckd_private *) device->private; + + reason = irb->ecw[8]; + DEV_MESSAGE(KERN_WARNING, device, "%s %x", + "eckd handle summary unit check: reason", reason); + + lcu = private->lcu; + if (!lcu) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "device not ready to handle summary" + " unit check (no lcu structure)"); + return; + } + spin_lock(&lcu->lock); + _stop_all_devices_on_lcu(lcu, device); + /* prepare for lcu_update */ + private->lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING; + /* If this device is about to be removed just return and wait for + * the next interrupt on a different device + */ + if (list_empty(&device->alias_list)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "device is in offline processing," + " don't do summary unit check handling"); + spin_unlock(&lcu->lock); + return; + } + if (lcu->suc_data.device) { + /* already scheduled or running */ + DEV_MESSAGE(KERN_WARNING, device, "%s", + "previous instance of summary unit check worker" + " still pending"); + spin_unlock(&lcu->lock); + return ; + } + lcu->suc_data.reason = reason; + lcu->suc_data.device = device; + spin_unlock(&lcu->lock); + schedule_work(&lcu->suc_data.worker); +}; diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 0c67258f..f4fb402 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -49,22 +49,6 @@ struct dasd_devmap { }; /* - * dasd_server_ssid_map contains a globally unique storage server subsystem ID. - * dasd_server_ssid_list contains the list of all subsystem IDs accessed by - * the DASD device driver. - */ -struct dasd_server_ssid_map { - struct list_head list; - struct system_id { - char vendor[4]; - char serial[15]; - __u16 ssid; - } sid; -}; - -static struct list_head dasd_server_ssid_list; - -/* * Parameter parsing functions for dasd= parameter. The syntax is: * <devno> : (0x)?[0-9a-fA-F]+ * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ @@ -721,8 +705,9 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr, devmap->features &= ~DASD_FEATURE_READONLY; if (devmap->device) devmap->device->features = devmap->features; - if (devmap->device && devmap->device->gdp) - set_disk_ro(devmap->device->gdp, val); + if (devmap->device && devmap->device->block + && devmap->device->block->gdp) + set_disk_ro(devmap->device->block->gdp, val); spin_unlock(&dasd_devmap_lock); return count; } @@ -893,12 +878,16 @@ dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf) devmap = dasd_find_busid(dev->bus_id); spin_lock(&dasd_devmap_lock); - if (!IS_ERR(devmap)) - alias = devmap->uid.alias; + if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) { + spin_unlock(&dasd_devmap_lock); + return sprintf(buf, "0\n"); + } + if (devmap->uid.type == UA_BASE_PAV_ALIAS || + devmap->uid.type == UA_HYPER_PAV_ALIAS) + alias = 1; else alias = 0; spin_unlock(&dasd_devmap_lock); - return sprintf(buf, alias ? "1\n" : "0\n"); } @@ -930,19 +919,36 @@ static ssize_t dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct dasd_devmap *devmap; - char uid[UID_STRLEN]; + char uid_string[UID_STRLEN]; + char ua_string[3]; + struct dasd_uid *uid; devmap = dasd_find_busid(dev->bus_id); spin_lock(&dasd_devmap_lock); - if (!IS_ERR(devmap) && strlen(devmap->uid.vendor) > 0) - snprintf(uid, sizeof(uid), "%s.%s.%04x.%02x", - devmap->uid.vendor, devmap->uid.serial, - devmap->uid.ssid, devmap->uid.unit_addr); - else - uid[0] = 0; + if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) { + spin_unlock(&dasd_devmap_lock); + return sprintf(buf, "\n"); + } + uid = &devmap->uid; + switch (uid->type) { + case UA_BASE_DEVICE: + sprintf(ua_string, "%02x", uid->real_unit_addr); + break; + case UA_BASE_PAV_ALIAS: + sprintf(ua_string, "%02x", uid->base_unit_addr); + break; + case UA_HYPER_PAV_ALIAS: + sprintf(ua_string, "xx"); + break; + default: + /* should not happen, treat like base device */ + sprintf(ua_string, "%02x", uid->real_unit_addr); + break; + } + snprintf(uid_string, sizeof(uid_string), "%s.%s.%04x.%s", + uid->vendor, uid->serial, uid->ssid, ua_string); spin_unlock(&dasd_devmap_lock); - - return snprintf(buf, PAGE_SIZE, "%s\n", uid); + return snprintf(buf, PAGE_SIZE, "%s\n", uid_string); } static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); @@ -1040,39 +1046,16 @@ int dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid) { struct dasd_devmap *devmap; - struct dasd_server_ssid_map *srv, *tmp; devmap = dasd_find_busid(cdev->dev.bus_id); if (IS_ERR(devmap)) return PTR_ERR(devmap); - /* generate entry for server_ssid_map */ - srv = (struct dasd_server_ssid_map *) - kzalloc(sizeof(struct dasd_server_ssid_map), GFP_KERNEL); - if (!srv) - return -ENOMEM; - strncpy(srv->sid.vendor, uid->vendor, sizeof(srv->sid.vendor) - 1); - strncpy(srv->sid.serial, uid->serial, sizeof(srv->sid.serial) - 1); - srv->sid.ssid = uid->ssid; - - /* server is already contained ? */ spin_lock(&dasd_devmap_lock); devmap->uid = *uid; - list_for_each_entry(tmp, &dasd_server_ssid_list, list) { - if (!memcmp(&srv->sid, &tmp->sid, - sizeof(struct system_id))) { - kfree(srv); - srv = NULL; - break; - } - } - - /* add servermap to serverlist */ - if (srv) - list_add(&srv->list, &dasd_server_ssid_list); spin_unlock(&dasd_devmap_lock); - return (srv ? 1 : 0); + return 0; } EXPORT_SYMBOL_GPL(dasd_set_uid); @@ -1138,9 +1121,6 @@ dasd_devmap_init(void) dasd_max_devindex = 0; for (i = 0; i < 256; i++) INIT_LIST_HEAD(&dasd_hashlists[i]); - - /* Initialize servermap structure. */ - INIT_LIST_HEAD(&dasd_server_ssid_list); return 0; } diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index 571320ab..d91df38 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -142,7 +142,7 @@ dasd_diag_erp(struct dasd_device *device) int rc; mdsk_term_io(device); - rc = mdsk_init_io(device, device->bp_block, 0, NULL); + rc = mdsk_init_io(device, device->block->bp_block, 0, NULL); if (rc) DEV_MESSAGE(KERN_WARNING, device, "DIAG ERP unsuccessful, " "rc=%d", rc); @@ -158,11 +158,11 @@ dasd_start_diag(struct dasd_ccw_req * cqr) struct dasd_diag_req *dreq; int rc; - device = cqr->device; + device = cqr->startdev; if (cqr->retries < 0) { DEV_MESSAGE(KERN_WARNING, device, "DIAG start_IO: request %p " "- no retry left)", cqr); - cqr->status = DASD_CQR_FAILED; + cqr->status = DASD_CQR_ERROR; return -EIO; } private = (struct dasd_diag_private *) device->private; @@ -184,7 +184,7 @@ dasd_start_diag(struct dasd_ccw_req * cqr) switch (rc) { case 0: /* Synchronous I/O finished successfully */ cqr->stopclk = get_clock(); - cqr->status = DASD_CQR_DONE; + cqr->status = DASD_CQR_SUCCESS; /* Indicate to calling function that only a dasd_schedule_bh() and no timer is needed */ rc = -EACCES; @@ -209,12 +209,12 @@ dasd_diag_term_IO(struct dasd_ccw_req * cqr) { struct dasd_device *device; - device = cqr->device; + device = cqr->startdev; mdsk_term_io(device); - mdsk_init_io(device, device->bp_block, 0, NULL); - cqr->status = DASD_CQR_CLEAR; + mdsk_init_io(device, device->block->bp_block, 0, NULL); + cqr->status = DASD_CQR_CLEAR_PENDING; cqr->stopclk = get_clock(); - dasd_schedule_bh(device); + dasd_schedule_device_bh(device); return 0; } @@ -247,7 +247,7 @@ dasd_ext_handler(__u16 code) return; } cqr = (struct dasd_ccw_req *) ip; - device = (struct dasd_device *) cqr->device; + device = (struct dasd_device *) cqr->startdev; if (strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { DEV_MESSAGE(KERN_WARNING, device, " magic number of dasd_ccw_req 0x%08X doesn't" @@ -260,10 +260,10 @@ dasd_ext_handler(__u16 code) spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); /* Check for a pending clear operation */ - if (cqr->status == DASD_CQR_CLEAR) { - cqr->status = DASD_CQR_QUEUED; - dasd_clear_timer(device); - dasd_schedule_bh(device); + if (cqr->status == DASD_CQR_CLEAR_PENDING) { + cqr->status = DASD_CQR_CLEARED; + dasd_device_clear_timer(device); + dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); return; } @@ -272,11 +272,11 @@ dasd_ext_handler(__u16 code) expires = 0; if (status == 0) { - cqr->status = DASD_CQR_DONE; + cqr->status = DASD_CQR_SUCCESS; /* Start first request on queue if possible -> fast_io. */ if (!list_empty(&device->ccw_queue)) { next = list_entry(device->ccw_queue.next, - struct dasd_ccw_req, list); + struct dasd_ccw_req, devlist); if (next->status == DASD_CQR_QUEUED) { rc = dasd_start_diag(next); if (rc == 0) @@ -296,10 +296,10 @@ dasd_ext_handler(__u16 code) } if (expires != 0) - dasd_set_timer(device, expires); + dasd_device_set_timer(device, expires); else - dasd_clear_timer(device); - dasd_schedule_bh(device); + dasd_device_clear_timer(device); + dasd_schedule_device_bh(device); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); } @@ -309,6 +309,7 @@ dasd_ext_handler(__u16 code) static int dasd_diag_check_device(struct dasd_device *device) { + struct dasd_block *block; struct dasd_diag_private *private; struct dasd_diag_characteristics *rdc_data; struct dasd_diag_bio bio; @@ -328,6 +329,16 @@ dasd_diag_check_device(struct dasd_device *device) ccw_device_get_id(device->cdev, &private->dev_id); device->private = (void *) private; } + block = dasd_alloc_block(); + if (IS_ERR(block)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "could not allocate dasd block structure"); + kfree(device->private); + return PTR_ERR(block); + } + device->block = block; + block->base = device; + /* Read Device Characteristics */ rdc_data = (void *) &(private->rdc_data); rdc_data->dev_nr = private->dev_id.devno; @@ -409,14 +420,14 @@ dasd_diag_check_device(struct dasd_device *device) sizeof(DASD_DIAG_CMS1)) == 0) { /* get formatted blocksize from label block */ bsize = (unsigned int) label->block_size; - device->blocks = (unsigned long) label->block_count; + block->blocks = (unsigned long) label->block_count; } else - device->blocks = end_block; - device->bp_block = bsize; - device->s2b_shift = 0; /* bits to shift 512 to get a block */ + block->blocks = end_block; + block->bp_block = bsize; + block->s2b_shift = 0; /* bits to shift 512 to get a block */ for (sb = 512; sb < bsize; sb = sb << 1) - device->s2b_shift++; - rc = mdsk_init_io(device, device->bp_block, 0, NULL); + block->s2b_shift++; + rc = mdsk_init_io(device, block->bp_block, 0, NULL); if (rc) { DEV_MESSAGE(KERN_WARNING, device, "DIAG initialization " "failed (rc=%d)", rc); @@ -424,9 +435,9 @@ dasd_diag_check_device(struct dasd_device *device) } else { DEV_MESSAGE(KERN_INFO, device, "(%ld B/blk): %ldkB", - (unsigned long) device->bp_block, - (unsigned long) (device->blocks << - device->s2b_shift) >> 1); + (unsigned long) block->bp_block, + (unsigned long) (block->blocks << + block->s2b_shift) >> 1); } out: free_page((long) label); @@ -436,22 +447,16 @@ out: /* Fill in virtual disk geometry for device. Return zero on success, non-zero * otherwise. */ static int -dasd_diag_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) +dasd_diag_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) { - if (dasd_check_blocksize(device->bp_block) != 0) + if (dasd_check_blocksize(block->bp_block) != 0) return -EINVAL; - geo->cylinders = (device->blocks << device->s2b_shift) >> 10; + geo->cylinders = (block->blocks << block->s2b_shift) >> 10; geo->heads = 16; - geo->sectors = 128 >> device->s2b_shift; + geo->sectors = 128 >> block->s2b_shift; return 0; } -static dasd_era_t -dasd_diag_examine_error(struct dasd_ccw_req * cqr, struct irb * stat) -{ - return dasd_era_fatal; -} - static dasd_erp_fn_t dasd_diag_erp_action(struct dasd_ccw_req * cqr) { @@ -466,8 +471,9 @@ dasd_diag_erp_postaction(struct dasd_ccw_req * cqr) /* Create DASD request from block device request. Return pointer to new * request on success, ERR_PTR otherwise. */ -static struct dasd_ccw_req * -dasd_diag_build_cp(struct dasd_device * device, struct request *req) +static struct dasd_ccw_req *dasd_diag_build_cp(struct dasd_device *memdev, + struct dasd_block *block, + struct request *req) { struct dasd_ccw_req *cqr; struct dasd_diag_req *dreq; @@ -486,17 +492,17 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) rw_cmd = MDSK_WRITE_REQ; else return ERR_PTR(-EINVAL); - blksize = device->bp_block; + blksize = block->bp_block; /* Calculate record id of first and last block. */ - first_rec = req->sector >> device->s2b_shift; - last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; + first_rec = req->sector >> block->s2b_shift; + last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift; /* Check struct bio and count the number of blocks for the request. */ count = 0; rq_for_each_segment(bv, req, iter) { if (bv->bv_len & (blksize - 1)) /* Fba can only do full blocks. */ return ERR_PTR(-EINVAL); - count += bv->bv_len >> (device->s2b_shift + 9); + count += bv->bv_len >> (block->s2b_shift + 9); } /* Paranoia. */ if (count != last_rec - first_rec + 1) @@ -505,7 +511,7 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) datasize = sizeof(struct dasd_diag_req) + count*sizeof(struct dasd_diag_bio); cqr = dasd_smalloc_request(dasd_diag_discipline.name, 0, - datasize, device); + datasize, memdev); if (IS_ERR(cqr)) return cqr; @@ -529,7 +535,9 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) cqr->buildclk = get_clock(); if (req->cmd_flags & REQ_FAILFAST) set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); - cqr->device = device; + cqr->startdev = memdev; + cqr->memdev = memdev; + cqr->block = block; cqr->expires = DIAG_TIMEOUT; cqr->status = DASD_CQR_FILLED; return cqr; @@ -543,10 +551,15 @@ dasd_diag_free_cp(struct dasd_ccw_req *cqr, struct request *req) int status; status = cqr->status == DASD_CQR_DONE; - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return status; } +static void dasd_diag_handle_terminated_request(struct dasd_ccw_req *cqr) +{ + cqr->status = DASD_CQR_FILLED; +}; + /* Fill in IOCTL data for device. */ static int dasd_diag_fill_info(struct dasd_device * device, @@ -583,7 +596,7 @@ static struct dasd_discipline dasd_diag_discipline = { .fill_geometry = dasd_diag_fill_geometry, .start_IO = dasd_start_diag, .term_IO = dasd_diag_term_IO, - .examine_error = dasd_diag_examine_error, + .handle_terminated_request = dasd_diag_handle_terminated_request, .erp_action = dasd_diag_erp_action, .erp_postaction = dasd_diag_erp_postaction, .build_cp = dasd_diag_build_cp, diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 44adf84..61f1693 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -52,16 +52,6 @@ MODULE_LICENSE("GPL"); static struct dasd_discipline dasd_eckd_discipline; -struct dasd_eckd_private { - struct dasd_eckd_characteristics rdc_data; - struct dasd_eckd_confdata conf_data; - struct dasd_eckd_path path_data; - struct eckd_count count_area[5]; - int init_cqr_status; - int uses_cdl; - struct attrib_data_t attrib; /* e.g. cache operations */ -}; - /* The ccw bus type uses this table to find devices that it sends to * dasd_eckd_probe */ static struct ccw_device_id dasd_eckd_ids[] = { @@ -188,7 +178,7 @@ check_XRC (struct ccw1 *de_ccw, if (rc == -ENOSYS || rc == -EACCES) rc = 0; - de_ccw->count = sizeof (struct DE_eckd_data); + de_ccw->count = sizeof(struct DE_eckd_data); de_ccw->flags |= CCW_FLAG_SLI; return rc; } @@ -208,7 +198,7 @@ define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, ccw->count = 16; ccw->cda = (__u32) __pa(data); - memset(data, 0, sizeof (struct DE_eckd_data)); + memset(data, 0, sizeof(struct DE_eckd_data)); switch (cmd) { case DASD_ECKD_CCW_READ_HOME_ADDRESS: case DASD_ECKD_CCW_READ_RECORD_ZERO: @@ -280,6 +270,132 @@ define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, return rc; } +static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, + struct dasd_device *device) +{ + struct dasd_eckd_private *private; + int rc; + + private = (struct dasd_eckd_private *) device->private; + if (!private->rdc_data.facilities.XRC_supported) + return 0; + + /* switch on System Time Stamp - needed for XRC Support */ + pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */ + pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */ + pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ + + rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time); + /* Ignore return code if sync clock is switched off. */ + if (rc == -ENOSYS || rc == -EACCES) + rc = 0; + return rc; +} + +static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, int trk, + int totrk, int cmd, struct dasd_device *basedev, + struct dasd_device *startdev) +{ + struct dasd_eckd_private *basepriv, *startpriv; + struct DE_eckd_data *data; + struct ch_t geo, beg, end; + int rc = 0; + + basepriv = (struct dasd_eckd_private *) basedev->private; + startpriv = (struct dasd_eckd_private *) startdev->private; + data = &pfxdata->define_extend; + + ccw->cmd_code = DASD_ECKD_CCW_PFX; + ccw->flags = 0; + ccw->count = sizeof(*pfxdata); + ccw->cda = (__u32) __pa(pfxdata); + + memset(pfxdata, 0, sizeof(*pfxdata)); + /* prefix data */ + pfxdata->format = 0; + pfxdata->base_address = basepriv->conf_data.ned1.unit_addr; + pfxdata->base_lss = basepriv->conf_data.ned1.ID; + pfxdata->validity.define_extend = 1; + + /* private uid is kept up to date, conf_data may be outdated */ + if (startpriv->uid.type != UA_BASE_DEVICE) { + pfxdata->validity.verify_base = 1; + if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) + pfxdata->validity.hyper_pav = 1; + } + + /* define extend data (mostly)*/ + switch (cmd) { + case DASD_ECKD_CCW_READ_HOME_ADDRESS: + case DASD_ECKD_CCW_READ_RECORD_ZERO: + case DASD_ECKD_CCW_READ: + case DASD_ECKD_CCW_READ_MT: + case DASD_ECKD_CCW_READ_CKD: + case DASD_ECKD_CCW_READ_CKD_MT: + case DASD_ECKD_CCW_READ_KD: + case DASD_ECKD_CCW_READ_KD_MT: + case DASD_ECKD_CCW_READ_COUNT: + data->mask.perm = 0x1; + data->attributes.operation = basepriv->attrib.operation; + break; + case DASD_ECKD_CCW_WRITE: + case DASD_ECKD_CCW_WRITE_MT: + case DASD_ECKD_CCW_WRITE_KD: + case DASD_ECKD_CCW_WRITE_KD_MT: + data->mask.perm = 0x02; + data->attributes.operation = basepriv->attrib.operation; + rc = check_XRC_on_prefix(pfxdata, basedev); + break; + case DASD_ECKD_CCW_WRITE_CKD: + case DASD_ECKD_CCW_WRITE_CKD_MT: + data->attributes.operation = DASD_BYPASS_CACHE; + rc = check_XRC_on_prefix(pfxdata, basedev); + break; + case DASD_ECKD_CCW_ERASE: + case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: + case DASD_ECKD_CCW_WRITE_RECORD_ZERO: + data->mask.perm = 0x3; + data->mask.auth = 0x1; + data->attributes.operation = DASD_BYPASS_CACHE; + rc = check_XRC_on_prefix(pfxdata, basedev); + break; + default: + DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd); + break; + } + + data->attributes.mode = 0x3; /* ECKD */ + + if ((basepriv->rdc_data.cu_type == 0x2105 || + basepriv->rdc_data.cu_type == 0x2107 || + basepriv->rdc_data.cu_type == 0x1750) + && !(basepriv->uses_cdl && trk < 2)) + data->ga_extended |= 0x40; /* Regular Data Format Mode */ + + geo.cyl = basepriv->rdc_data.no_cyl; + geo.head = basepriv->rdc_data.trk_per_cyl; + beg.cyl = trk / geo.head; + beg.head = trk % geo.head; + end.cyl = totrk / geo.head; + end.head = totrk % geo.head; + + /* check for sequential prestage - enhance cylinder range */ + if (data->attributes.operation == DASD_SEQ_PRESTAGE || + data->attributes.operation == DASD_SEQ_ACCESS) { + + if (end.cyl + basepriv->attrib.nr_cyl < geo.cyl) + end.cyl += basepriv->attrib.nr_cyl; + else + end.cyl = (geo.cyl - 1); + } + + data->beg_ext.cyl = beg.cyl; + data->beg_ext.head = beg.head; + data->end_ext.cyl = end.cyl; + data->end_ext.head = end.head; + return rc; +} + static void locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, int rec_on_trk, int no_rec, int cmd, @@ -300,7 +416,7 @@ locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, ccw->count = 16; ccw->cda = (__u32) __pa(data); - memset(data, 0, sizeof (struct LO_eckd_data)); + memset(data, 0, sizeof(struct LO_eckd_data)); sector = 0; if (rec_on_trk) { switch (private->rdc_data.dev_type) { @@ -441,12 +557,15 @@ dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) sizeof(uid->serial) - 1); EBCASC(uid->serial, sizeof(uid->serial) - 1); uid->ssid = confdata->neq.subsystemID; - if (confdata->ned2.sneq.flags == 0x40) { - uid->alias = 1; - uid->unit_addr = confdata->ned2.sneq.base_unit_addr; - } else - uid->unit_addr = confdata->ned1.unit_addr; - + uid->real_unit_addr = confdata->ned1.unit_addr; + if (confdata->ned2.sneq.flags == 0x40 && + confdata->ned2.sneq.format == 0x0001) { + uid->type = confdata->ned2.sneq.sua_flags; + if (uid->type == UA_BASE_PAV_ALIAS) + uid->base_unit_addr = confdata->ned2.sneq.base_unit_addr; + } else { + uid->type = UA_BASE_DEVICE; + } return 0; } @@ -470,7 +589,9 @@ static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, ccw->cda = (__u32)(addr_t)rcd_buffer; ccw->count = ciw->count; - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; cqr->expires = 10*HZ; cqr->lpm = lpm; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); @@ -511,7 +632,7 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device, /* * on success we update the user input parms */ - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); if (ret) goto out_error; @@ -557,19 +678,19 @@ dasd_eckd_read_conf(struct dasd_device *device) "data retrieved"); continue; /* no error */ } - if (conf_len != sizeof (struct dasd_eckd_confdata)) { + if (conf_len != sizeof(struct dasd_eckd_confdata)) { MESSAGE(KERN_WARNING, "sizes of configuration data mismatch" "%d (read) vs %ld (expected)", conf_len, - sizeof (struct dasd_eckd_confdata)); + sizeof(struct dasd_eckd_confdata)); kfree(conf_data); continue; /* no error */ } /* save first valid configuration data */ if (!conf_data_saved){ memcpy(&private->conf_data, conf_data, - sizeof (struct dasd_eckd_confdata)); + sizeof(struct dasd_eckd_confdata)); conf_data_saved++; } switch (((char *)conf_data)[242] & 0x07){ @@ -586,39 +707,104 @@ dasd_eckd_read_conf(struct dasd_device *device) return 0; } +static int dasd_eckd_read_features(struct dasd_device *device) +{ + struct dasd_psf_prssd_data *prssdp; + struct dasd_rssd_features *features; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + struct dasd_eckd_private *private; + + private = (struct dasd_eckd_private *) device->private; + cqr = dasd_smalloc_request(dasd_eckd_discipline.name, + 1 /* PSF */ + 1 /* RSSD */ , + (sizeof(struct dasd_psf_prssd_data) + + sizeof(struct dasd_rssd_features)), + device); + if (IS_ERR(cqr)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "Could not allocate initialization request"); + return PTR_ERR(cqr); + } + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); + cqr->retries = 5; + cqr->expires = 10 * HZ; + + /* Prepare for Read Subsystem Data */ + prssdp = (struct dasd_psf_prssd_data *) cqr->data; + memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); + prssdp->order = PSF_ORDER_PRSSD; + prssdp->suborder = 0x41; /* Read Feature Codes */ + /* all other bytes of prssdp must be zero */ + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = sizeof(struct dasd_psf_prssd_data); + ccw->flags |= CCW_FLAG_CC; + ccw->cda = (__u32)(addr_t) prssdp; + + /* Read Subsystem Data - feature codes */ + features = (struct dasd_rssd_features *) (prssdp + 1); + memset(features, 0, sizeof(struct dasd_rssd_features)); + + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(struct dasd_rssd_features); + ccw->cda = (__u32)(addr_t) features; + + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + rc = dasd_sleep_on(cqr); + if (rc == 0) { + prssdp = (struct dasd_psf_prssd_data *) cqr->data; + features = (struct dasd_rssd_features *) (prssdp + 1); + memcpy(&private->features, features, + sizeof(struct dasd_rssd_features)); + } + dasd_sfree_request(cqr, cqr->memdev); + return rc; +} + + /* * Build CP for Perform Subsystem Function - SSC. */ -static struct dasd_ccw_req * -dasd_eckd_build_psf_ssc(struct dasd_device *device) +static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) { - struct dasd_ccw_req *cqr; - struct dasd_psf_ssc_data *psf_ssc_data; - struct ccw1 *ccw; + struct dasd_ccw_req *cqr; + struct dasd_psf_ssc_data *psf_ssc_data; + struct ccw1 *ccw; - cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , + cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , sizeof(struct dasd_psf_ssc_data), device); - if (IS_ERR(cqr)) { - DEV_MESSAGE(KERN_WARNING, device, "%s", + if (IS_ERR(cqr)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate PSF-SSC request"); - return cqr; - } - psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; - psf_ssc_data->order = PSF_ORDER_SSC; - psf_ssc_data->suborder = 0x08; - - ccw = cqr->cpaddr; - ccw->cmd_code = DASD_ECKD_CCW_PSF; - ccw->cda = (__u32)(addr_t)psf_ssc_data; - ccw->count = 66; - - cqr->device = device; - cqr->expires = 10*HZ; - cqr->buildclk = get_clock(); - cqr->status = DASD_CQR_FILLED; - return cqr; + return cqr; + } + psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; + psf_ssc_data->order = PSF_ORDER_SSC; + psf_ssc_data->suborder = 0x88; + psf_ssc_data->reserved[0] = 0x88; + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->cda = (__u32)(addr_t)psf_ssc_data; + ccw->count = 66; + + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->expires = 10*HZ; + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + return cqr; } /* @@ -629,28 +815,28 @@ dasd_eckd_build_psf_ssc(struct dasd_device *device) static int dasd_eckd_psf_ssc(struct dasd_device *device) { - struct dasd_ccw_req *cqr; - int rc; - - cqr = dasd_eckd_build_psf_ssc(device); - if (IS_ERR(cqr)) - return PTR_ERR(cqr); - - rc = dasd_sleep_on(cqr); - if (!rc) - /* trigger CIO to reprobe devices */ - css_schedule_reprobe(); - dasd_sfree_request(cqr, cqr->device); - return rc; + struct dasd_ccw_req *cqr; + int rc; + + cqr = dasd_eckd_build_psf_ssc(device); + if (IS_ERR(cqr)) + return PTR_ERR(cqr); + + rc = dasd_sleep_on(cqr); + if (!rc) + /* trigger CIO to reprobe devices */ + css_schedule_reprobe(); + dasd_sfree_request(cqr, cqr->memdev); + return rc; } /* * Valide storage server of current device. */ -static int -dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) +static int dasd_eckd_validate_server(struct dasd_device *device) { int rc; + struct dasd_eckd_private *private; /* Currently PAV is the only reason to 'validate' server on LPAR */ if (dasd_nopav || MACHINE_IS_VM) @@ -659,9 +845,11 @@ dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) rc = dasd_eckd_psf_ssc(device); /* may be requested feature is not available on server, * therefore just report error and go ahead */ + private = (struct dasd_eckd_private *) device->private; DEV_MESSAGE(KERN_INFO, device, "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", - uid->vendor, uid->serial, uid->ssid, rc); + private->uid.vendor, private->uid.serial, + private->uid.ssid, rc); /* RE-Read Configuration Data */ return dasd_eckd_read_conf(device); } @@ -674,9 +862,9 @@ static int dasd_eckd_check_characteristics(struct dasd_device *device) { struct dasd_eckd_private *private; - struct dasd_uid uid; + struct dasd_block *block; void *rdc_data; - int rc; + int is_known, rc; private = (struct dasd_eckd_private *) device->private; if (private == NULL) { @@ -699,27 +887,54 @@ dasd_eckd_check_characteristics(struct dasd_device *device) /* Read Configuration Data */ rc = dasd_eckd_read_conf(device); if (rc) - return rc; + goto out_err1; /* Generate device unique id and register in devmap */ - rc = dasd_eckd_generate_uid(device, &uid); + rc = dasd_eckd_generate_uid(device, &private->uid); if (rc) - return rc; - rc = dasd_set_uid(device->cdev, &uid); - if (rc == 1) /* new server found */ - rc = dasd_eckd_validate_server(device, &uid); + goto out_err1; + dasd_set_uid(device->cdev, &private->uid); + + if (private->uid.type == UA_BASE_DEVICE) { + block = dasd_alloc_block(); + if (IS_ERR(block)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "could not allocate dasd block structure"); + rc = PTR_ERR(block); + goto out_err1; + } + device->block = block; + block->base = device; + } + + /* register lcu with alias handling, enable PAV if this is a new lcu */ + is_known = dasd_alias_make_device_known_to_lcu(device); + if (is_known < 0) { + rc = is_known; + goto out_err2; + } + if (!is_known) { + /* new lcu found */ + rc = dasd_eckd_validate_server(device); /* will switch pav on */ + if (rc) + goto out_err3; + } + + /* Read Feature Codes */ + rc = dasd_eckd_read_features(device); if (rc) - return rc; + goto out_err3; /* Read Device Characteristics */ rdc_data = (void *) &(private->rdc_data); memset(rdc_data, 0, sizeof(rdc_data)); rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); - if (rc) + if (rc) { DEV_MESSAGE(KERN_WARNING, device, "Read device characteristics returned " "rc=%d", rc); - + goto out_err3; + } DEV_MESSAGE(KERN_INFO, device, "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", private->rdc_data.dev_type, @@ -729,9 +944,24 @@ dasd_eckd_check_characteristics(struct dasd_device *device) private->rdc_data.no_cyl, private->rdc_data.trk_per_cyl, private->rdc_data.sec_per_trk); + return 0; + +out_err3: + dasd_alias_disconnect_device_from_lcu(device); +out_err2: + dasd_free_block(device->block); + device->block = NULL; +out_err1: + kfree(device->private); + device->private = NULL; return rc; } +static void dasd_eckd_uncheck_device(struct dasd_device *device) +{ + dasd_alias_disconnect_device_from_lcu(device); +} + static struct dasd_ccw_req * dasd_eckd_analysis_ccw(struct dasd_device *device) { @@ -755,7 +985,7 @@ dasd_eckd_analysis_ccw(struct dasd_device *device) /* Define extent for the first 3 tracks. */ define_extent(ccw++, cqr->data, 0, 2, DASD_ECKD_CCW_READ_COUNT, device); - LO_data = cqr->data + sizeof (struct DE_eckd_data); + LO_data = cqr->data + sizeof(struct DE_eckd_data); /* Locate record for the first 4 records on track 0. */ ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, 0, 0, 4, @@ -783,7 +1013,9 @@ dasd_eckd_analysis_ccw(struct dasd_device *device) ccw->count = 8; ccw->cda = (__u32)(addr_t) count_data; - cqr->device = device; + cqr->block = NULL; + cqr->startdev = device; + cqr->memdev = device; cqr->retries = 0; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; @@ -803,7 +1035,7 @@ dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) struct dasd_eckd_private *private; struct dasd_device *device; - device = init_cqr->device; + device = init_cqr->startdev; private = (struct dasd_eckd_private *) device->private; private->init_cqr_status = init_cqr->status; dasd_sfree_request(init_cqr, device); @@ -811,13 +1043,13 @@ dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) } static int -dasd_eckd_start_analysis(struct dasd_device *device) +dasd_eckd_start_analysis(struct dasd_block *block) { struct dasd_eckd_private *private; struct dasd_ccw_req *init_cqr; - private = (struct dasd_eckd_private *) device->private; - init_cqr = dasd_eckd_analysis_ccw(device); + private = (struct dasd_eckd_private *) block->base->private; + init_cqr = dasd_eckd_analysis_ccw(block->base); if (IS_ERR(init_cqr)) return PTR_ERR(init_cqr); init_cqr->callback = dasd_eckd_analysis_callback; @@ -828,13 +1060,15 @@ dasd_eckd_start_analysis(struct dasd_device *device) } static int -dasd_eckd_end_analysis(struct dasd_device *device) +dasd_eckd_end_analysis(struct dasd_block *block) { + struct dasd_device *device; struct dasd_eckd_private *private; struct eckd_count *count_area; unsigned int sb, blk_per_trk; int status, i; + device = block->base; private = (struct dasd_eckd_private *) device->private; status = private->init_cqr_status; private->init_cqr_status = -1; @@ -846,7 +1080,7 @@ dasd_eckd_end_analysis(struct dasd_device *device) private->uses_cdl = 1; /* Calculate number of blocks/records per track. */ - blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); + blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); /* Check Track 0 for Compatible Disk Layout */ count_area = NULL; for (i = 0; i < 3; i++) { @@ -876,56 +1110,65 @@ dasd_eckd_end_analysis(struct dasd_device *device) if (count_area != NULL && count_area->kl == 0) { /* we found notthing violating our disk layout */ if (dasd_check_blocksize(count_area->dl) == 0) - device->bp_block = count_area->dl; + block->bp_block = count_area->dl; } - if (device->bp_block == 0) { + if (block->bp_block == 0) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Volume has incompatible disk layout"); return -EMEDIUMTYPE; } - device->s2b_shift = 0; /* bits to shift 512 to get a block */ - for (sb = 512; sb < device->bp_block; sb = sb << 1) - device->s2b_shift++; + block->s2b_shift = 0; /* bits to shift 512 to get a block */ + for (sb = 512; sb < block->bp_block; sb = sb << 1) + block->s2b_shift++; - blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); - device->blocks = (private->rdc_data.no_cyl * + blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); + block->blocks = (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * blk_per_trk); DEV_MESSAGE(KERN_INFO, device, "(%dkB blks): %dkB at %dkB/trk %s", - (device->bp_block >> 10), + (block->bp_block >> 10), ((private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * - blk_per_trk * (device->bp_block >> 9)) >> 1), - ((blk_per_trk * device->bp_block) >> 10), + blk_per_trk * (block->bp_block >> 9)) >> 1), + ((blk_per_trk * block->bp_block) >> 10), private->uses_cdl ? "compatible disk layout" : "linux disk layout"); return 0; } -static int -dasd_eckd_do_analysis(struct dasd_device *device) +static int dasd_eckd_do_analysis(struct dasd_block *block) { struct dasd_eckd_private *private; - private = (struct dasd_eckd_private *) device->private; + private = (struct dasd_eckd_private *) block->base->private; if (private->init_cqr_status < 0) - return dasd_eckd_start_analysis(device); + return dasd_eckd_start_analysis(block); else - return dasd_eckd_end_analysis(device); + return dasd_eckd_end_analysis(block); } +static int dasd_eckd_ready_to_online(struct dasd_device *device) +{ + return dasd_alias_add_device(device); +}; + +static int dasd_eckd_online_to_ready(struct dasd_device *device) +{ + return dasd_alias_remove_device(device); +}; + static int -dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) +dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) { struct dasd_eckd_private *private; - private = (struct dasd_eckd_private *) device->private; - if (dasd_check_blocksize(device->bp_block) == 0) { + private = (struct dasd_eckd_private *) block->base->private; + if (dasd_check_blocksize(block->bp_block) == 0) { geo->sectors = recs_per_track(&private->rdc_data, - 0, device->bp_block); + 0, block->bp_block); } geo->cylinders = private->rdc_data.no_cyl; geo->heads = private->rdc_data.trk_per_cyl; @@ -1037,7 +1280,7 @@ dasd_eckd_format_device(struct dasd_device * device, locate_record(ccw++, (struct LO_eckd_data *) data, fdata->start_unit, 0, rpt + 1, DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, - device->bp_block); + device->block->bp_block); data += sizeof(struct LO_eckd_data); break; case 0x04: /* Invalidate track. */ @@ -1110,43 +1353,28 @@ dasd_eckd_format_device(struct dasd_device * device, ccw++; } } - fcp->device = device; - fcp->retries = 2; /* set retry counter to enable ERP */ + fcp->startdev = device; + fcp->memdev = device; + clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); + fcp->retries = 5; /* set retry counter to enable default ERP */ fcp->buildclk = get_clock(); fcp->status = DASD_CQR_FILLED; return fcp; } -static dasd_era_t -dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) +static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) { - struct dasd_device *device = (struct dasd_device *) cqr->device; - struct ccw_device *cdev = device->cdev; - - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - - switch (cdev->id.cu_type) { - case 0x3990: - case 0x2105: - case 0x2107: - case 0x1750: - return dasd_3990_erp_examine(cqr, irb); - case 0x9343: - return dasd_9343_erp_examine(cqr, irb); - case 0x3880: - default: - DEV_MESSAGE(KERN_WARNING, device, "%s", - "default (unknown CU type) - RECOVERABLE return"); - return dasd_era_recover; + cqr->status = DASD_CQR_FILLED; + if (cqr->block && (cqr->startdev != cqr->block->base)) { + dasd_eckd_reset_ccw_to_base_io(cqr); + cqr->startdev = cqr->block->base; } -} +}; static dasd_erp_fn_t dasd_eckd_erp_action(struct dasd_ccw_req * cqr) { - struct dasd_device *device = (struct dasd_device *) cqr->device; + struct dasd_device *device = (struct dasd_device *) cqr->startdev; struct ccw_device *cdev = device->cdev; switch (cdev->id.cu_type) { @@ -1168,8 +1396,37 @@ dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) return dasd_default_erp_postaction; } -static struct dasd_ccw_req * -dasd_eckd_build_cp(struct dasd_device * device, struct request *req) + +static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, + struct irb *irb) +{ + char mask; + + /* first of all check for state change pending interrupt */ + mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; + if ((irb->scsw.dstat & mask) == mask) { + dasd_generic_handle_state_change(device); + return; + } + + /* summary unit check */ + if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && irb->ecw[7] == 0x0D) { + dasd_alias_handle_summary_unit_check(device, irb); + return; + } + + /* just report other unsolicited interrupts */ + DEV_MESSAGE(KERN_DEBUG, device, "%s", + "unsolicited interrupt received"); + device->discipline->dump_sense(device, NULL, irb); + dasd_schedule_device_bh(device); + + return; +}; + +static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, + struct dasd_block *block, + struct request *req) { struct dasd_eckd_private *private; unsigned long *idaws; @@ -1185,8 +1442,11 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) sector_t first_trk, last_trk; unsigned int first_offs, last_offs; unsigned char cmd, rcmd; + int use_prefix; + struct dasd_device *basedev; - private = (struct dasd_eckd_private *) device->private; + basedev = block->base; + private = (struct dasd_eckd_private *) basedev->private; if (rq_data_dir(req) == READ) cmd = DASD_ECKD_CCW_READ_MT; else if (rq_data_dir(req) == WRITE) @@ -1194,13 +1454,13 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) else return ERR_PTR(-EINVAL); /* Calculate number of blocks/records per track. */ - blksize = device->bp_block; + blksize = block->bp_block; blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); /* Calculate record id of first and last block. */ - first_rec = first_trk = req->sector >> device->s2b_shift; + first_rec = first_trk = req->sector >> block->s2b_shift; first_offs = sector_div(first_trk, blk_per_trk); last_rec = last_trk = - (req->sector + req->nr_sectors - 1) >> device->s2b_shift; + (req->sector + req->nr_sectors - 1) >> block->s2b_shift; last_offs = sector_div(last_trk, blk_per_trk); /* Check struct bio and count the number of blocks for the request. */ count = 0; @@ -1209,20 +1469,33 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) if (bv->bv_len & (blksize - 1)) /* Eckd can only do full blocks. */ return ERR_PTR(-EINVAL); - count += bv->bv_len >> (device->s2b_shift + 9); + count += bv->bv_len >> (block->s2b_shift + 9); #if defined(CONFIG_64BIT) if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) - cidaw += bv->bv_len >> (device->s2b_shift + 9); + cidaw += bv->bv_len >> (block->s2b_shift + 9); #endif } /* Paranoia. */ if (count != last_rec - first_rec + 1) return ERR_PTR(-EINVAL); - /* 1x define extent + 1x locate record + number of blocks */ - cplength = 2 + count; - /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ - datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + - cidaw * sizeof(unsigned long); + + /* use the prefix command if available */ + use_prefix = private->features.feature[8] & 0x01; + if (use_prefix) { + /* 1x prefix + number of blocks */ + cplength = 2 + count; + /* 1x prefix + cidaws*sizeof(long) */ + datasize = sizeof(struct PFX_eckd_data) + + sizeof(struct LO_eckd_data) + + cidaw * sizeof(unsigned long); + } else { + /* 1x define extent + 1x locate record + number of blocks */ + cplength = 2 + count; + /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ + datasize = sizeof(struct DE_eckd_data) + + sizeof(struct LO_eckd_data) + + cidaw * sizeof(unsigned long); + } /* Find out the number of additional locate record ccws for cdl. */ if (private->uses_cdl && first_rec < 2*blk_per_trk) { if (last_rec >= 2*blk_per_trk) @@ -1232,26 +1505,42 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) } /* Allocate the ccw request. */ cqr = dasd_smalloc_request(dasd_eckd_discipline.name, - cplength, datasize, device); + cplength, datasize, startdev); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; - /* First ccw is define extent. */ - if (define_extent(ccw++, cqr->data, first_trk, - last_trk, cmd, device) == -EAGAIN) { - /* Clock not in sync and XRC is enabled. Try again later. */ - dasd_sfree_request(cqr, device); - return ERR_PTR(-EAGAIN); + /* First ccw is define extent or prefix. */ + if (use_prefix) { + if (prefix(ccw++, cqr->data, first_trk, + last_trk, cmd, basedev, startdev) == -EAGAIN) { + /* Clock not in sync and XRC is enabled. + * Try again later. + */ + dasd_sfree_request(cqr, startdev); + return ERR_PTR(-EAGAIN); + } + idaws = (unsigned long *) (cqr->data + + sizeof(struct PFX_eckd_data)); + } else { + if (define_extent(ccw++, cqr->data, first_trk, + last_trk, cmd, startdev) == -EAGAIN) { + /* Clock not in sync and XRC is enabled. + * Try again later. + */ + dasd_sfree_request(cqr, startdev); + return ERR_PTR(-EAGAIN); + } + idaws = (unsigned long *) (cqr->data + + sizeof(struct DE_eckd_data)); } /* Build locate_record+read/write/ccws. */ - idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); LO_data = (struct LO_eckd_data *) (idaws + cidaw); recid = first_rec; if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { /* Only standard blocks so there is just one locate record. */ ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, first_trk, first_offs + 1, - last_rec - recid + 1, cmd, device, blksize); + last_rec - recid + 1, cmd, basedev, blksize); } rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; @@ -1281,7 +1570,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, trkid, recoffs + 1, - 1, rcmd, device, count); + 1, rcmd, basedev, count); } /* Locate record for standard blocks ? */ if (private->uses_cdl && recid == 2*blk_per_trk) { @@ -1289,7 +1578,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) locate_record(ccw++, LO_data++, trkid, recoffs + 1, last_rec - recid + 1, - cmd, device, count); + cmd, basedev, count); } /* Read/write ccw. */ ccw[-1].flags |= CCW_FLAG_CC; @@ -1310,7 +1599,9 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) } if (req->cmd_flags & REQ_FAILFAST) set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); - cqr->device = device; + cqr->startdev = startdev; + cqr->memdev = startdev; + cqr->block = block; cqr->expires = 5 * 60 * HZ; /* 5 minutes */ cqr->lpm = private->path_data.ppm; cqr->retries = 256; @@ -1333,10 +1624,10 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) if (!dasd_page_cache) goto out; - private = (struct dasd_eckd_private *) cqr->device->private; - blksize = cqr->device->bp_block; + private = (struct dasd_eckd_private *) cqr->block->base->private; + blksize = cqr->block->bp_block; blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); - recid = req->sector >> cqr->device->s2b_shift; + recid = req->sector >> cqr->block->s2b_shift; ccw = cqr->cpaddr; /* Skip over define extent & locate record. */ ccw++; @@ -1367,10 +1658,71 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) } out: status = cqr->status == DASD_CQR_DONE; - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return status; } +/* + * Modify ccw chain in cqr so it can be started on a base device. + * + * Note that this is not enough to restart the cqr! + * Either reset cqr->startdev as well (summary unit check handling) + * or restart via separate cqr (as in ERP handling). + */ +void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) +{ + struct ccw1 *ccw; + struct PFX_eckd_data *pfxdata; + + ccw = cqr->cpaddr; + pfxdata = cqr->data; + + if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { + pfxdata->validity.verify_base = 0; + pfxdata->validity.hyper_pav = 0; + } +} + +#define DASD_ECKD_CHANQ_MAX_SIZE 4 + +static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, + struct dasd_block *block, + struct request *req) +{ + struct dasd_eckd_private *private; + struct dasd_device *startdev; + unsigned long flags; + struct dasd_ccw_req *cqr; + + startdev = dasd_alias_get_start_dev(base); + if (!startdev) + startdev = base; + private = (struct dasd_eckd_private *) startdev->private; + if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) + return ERR_PTR(-EBUSY); + + spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); + private->count++; + cqr = dasd_eckd_build_cp(startdev, block, req); + if (IS_ERR(cqr)) + private->count--; + spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); + return cqr; +} + +static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, + struct request *req) +{ + struct dasd_eckd_private *private; + unsigned long flags; + + spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); + private = (struct dasd_eckd_private *) cqr->memdev->private; + private->count--; + spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); + return dasd_eckd_free_cp(cqr, req); +} + static int dasd_eckd_fill_info(struct dasd_device * device, struct dasd_information2_t * info) @@ -1384,9 +1736,9 @@ dasd_eckd_fill_info(struct dasd_device * device, info->characteristics_size = sizeof(struct dasd_eckd_characteristics); memcpy(info->characteristics, &private->rdc_data, sizeof(struct dasd_eckd_characteristics)); - info->confdata_size = sizeof (struct dasd_eckd_confdata); + info->confdata_size = sizeof(struct dasd_eckd_confdata); memcpy(info->configuration_data, &private->conf_data, - sizeof (struct dasd_eckd_confdata)); + sizeof(struct dasd_eckd_confdata)); return 0; } @@ -1419,7 +1771,8 @@ dasd_eckd_release(struct dasd_device *device) cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 2; /* set retry counter to enable basic ERP */ @@ -1429,7 +1782,7 @@ dasd_eckd_release(struct dasd_device *device) rc = dasd_sleep_on_immediatly(cqr); - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return rc; } @@ -1459,7 +1812,8 @@ dasd_eckd_reserve(struct dasd_device *device) cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 2; /* set retry counter to enable basic ERP */ @@ -1469,7 +1823,7 @@ dasd_eckd_reserve(struct dasd_device *device) rc = dasd_sleep_on_immediatly(cqr); - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return rc; } @@ -1498,7 +1852,8 @@ dasd_eckd_steal_lock(struct dasd_device *device) cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 2; /* set retry counter to enable basic ERP */ @@ -1508,7 +1863,7 @@ dasd_eckd_steal_lock(struct dasd_device *device) rc = dasd_sleep_on_immediatly(cqr); - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return rc; } @@ -1526,52 +1881,52 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp) cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1 /* PSF */ + 1 /* RSSD */ , - (sizeof (struct dasd_psf_prssd_data) + - sizeof (struct dasd_rssd_perf_stats_t)), + (sizeof(struct dasd_psf_prssd_data) + + sizeof(struct dasd_rssd_perf_stats_t)), device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate initialization request"); return PTR_ERR(cqr); } - cqr->device = device; + cqr->startdev = device; + cqr->memdev = device; cqr->retries = 0; cqr->expires = 10 * HZ; /* Prepare for Read Subsystem Data */ prssdp = (struct dasd_psf_prssd_data *) cqr->data; - memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); + memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); prssdp->order = PSF_ORDER_PRSSD; - prssdp->suborder = 0x01; /* Perfomance Statistics */ + prssdp->suborder = 0x01; /* Performance Statistics */ prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_PSF; - ccw->count = sizeof (struct dasd_psf_prssd_data); + ccw->count = sizeof(struct dasd_psf_prssd_data); ccw->flags |= CCW_FLAG_CC; ccw->cda = (__u32)(addr_t) prssdp; /* Read Subsystem Data - Performance Statistics */ stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); - memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); + memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); ccw++; ccw->cmd_code = DASD_ECKD_CCW_RSSD; - ccw->count = sizeof (struct dasd_rssd_perf_stats_t); + ccw->count = sizeof(struct dasd_rssd_perf_stats_t); ccw->cda = (__u32)(addr_t) stats; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; rc = dasd_sleep_on(cqr); if (rc == 0) { - /* Prepare for Read Subsystem Data */ prssdp = (struct dasd_psf_prssd_data *) cqr->data; stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); if (copy_to_user(argp, stats, sizeof(struct dasd_rssd_perf_stats_t))) rc = -EFAULT; } - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return rc; } @@ -1594,7 +1949,7 @@ dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) rc = 0; if (copy_to_user(argp, (long *) &attrib, - sizeof (struct attrib_data_t))) + sizeof(struct attrib_data_t))) rc = -EFAULT; return rc; @@ -1627,8 +1982,10 @@ dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) } static int -dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) +dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) { + struct dasd_device *device = block->base; + switch (cmd) { case BIODASDGATTR: return dasd_eckd_get_attrib(device, argp); @@ -1685,9 +2042,8 @@ dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) * Print sense data and related channel program. * Parts are printed because printk buffer is only 1024 bytes. */ -static void -dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, - struct irb *irb) +static void dasd_eckd_dump_sense(struct dasd_device *device, + struct dasd_ccw_req *req, struct irb *irb) { char *page; struct ccw1 *first, *last, *fail, *from, *to; @@ -1743,37 +2099,40 @@ dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, } printk("%s", page); - /* dump the Channel Program (max 140 Bytes per line) */ - /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ - first = req->cpaddr; - for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); - to = min(first + 6, last); - len = sprintf(page, KERN_ERR PRINTK_HEADER - " Related CP in req: %p\n", req); - dasd_eckd_dump_ccw_range(first, to, page + len); - printk("%s", page); + if (req) { + /* req == NULL for unsolicited interrupts */ + /* dump the Channel Program (max 140 Bytes per line) */ + /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ + first = req->cpaddr; + for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); + to = min(first + 6, last); + len = sprintf(page, KERN_ERR PRINTK_HEADER + " Related CP in req: %p\n", req); + dasd_eckd_dump_ccw_range(first, to, page + len); + printk("%s", page); - /* print failing CCW area (maximum 4) */ - /* scsw->cda is either valid or zero */ - len = 0; - from = ++to; - fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ - if (from < fail - 2) { - from = fail - 2; /* there is a gap - print header */ - len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); - } - to = min(fail + 1, last); - len += dasd_eckd_dump_ccw_range(from, to, page + len); - - /* print last CCWs (maximum 2) */ - from = max(from, ++to); - if (from < last - 1) { - from = last - 1; /* there is a gap - print header */ - len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); + /* print failing CCW area (maximum 4) */ + /* scsw->cda is either valid or zero */ + len = 0; + from = ++to; + fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ + if (from < fail - 2) { + from = fail - 2; /* there is a gap - print header */ + len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); + } + to = min(fail + 1, last); + len += dasd_eckd_dump_ccw_range(from, to, page + len); + + /* print last CCWs (maximum 2) */ + from = max(from, ++to); + if (from < last - 1) { + from = last - 1; /* there is a gap - print header */ + len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); + } + len += dasd_eckd_dump_ccw_range(from, last, page + len); + if (len > 0) + printk("%s", page); } - len += dasd_eckd_dump_ccw_range(from, last, page + len); - if (len > 0) - printk("%s", page); free_page((unsigned long) page); } @@ -1796,16 +2155,20 @@ static struct dasd_discipline dasd_eckd_discipline = { .ebcname = "ECKD", .max_blocks = 240, .check_device = dasd_eckd_check_characteristics, + .uncheck_device = dasd_eckd_uncheck_device, .do_analysis = dasd_eckd_do_analysis, + .ready_to_online = dasd_eckd_ready_to_online, + .online_to_ready = dasd_eckd_online_to_ready, .fill_geometry = dasd_eckd_fill_geometry, .start_IO = dasd_start_IO, .term_IO = dasd_term_IO, + .handle_terminated_request = dasd_eckd_handle_terminated_request, .format_device = dasd_eckd_format_device, - .examine_error = dasd_eckd_examine_error, .erp_action = dasd_eckd_erp_action, .erp_postaction = dasd_eckd_erp_postaction, - .build_cp = dasd_eckd_build_cp, - .free_cp = dasd_eckd_free_cp, + .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, + .build_cp = dasd_eckd_build_alias_cp, + .free_cp = dasd_eckd_free_alias_cp, .dump_sense = dasd_eckd_dump_sense, .fill_info = dasd_eckd_fill_info, .ioctl = dasd_eckd_ioctl, diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h index 712ff16..fc2509c 100644 --- a/drivers/s390/block/dasd_eckd.h +++ b/drivers/s390/block/dasd_eckd.h @@ -39,6 +39,8 @@ #define DASD_ECKD_CCW_READ_CKD_MT 0x9e #define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d #define DASD_ECKD_CCW_RESERVE 0xB4 +#define DASD_ECKD_CCW_PFX 0xE7 +#define DASD_ECKD_CCW_RSCK 0xF9 /* * Perform Subsystem Function / Sub-Orders @@ -137,6 +139,25 @@ struct LO_eckd_data { __u16 length; } __attribute__ ((packed)); +/* Prefix data for format 0x00 and 0x01 */ +struct PFX_eckd_data { + unsigned char format; + struct { + unsigned char define_extend:1; + unsigned char time_stamp:1; + unsigned char verify_base:1; + unsigned char hyper_pav:1; + unsigned char reserved:4; + } __attribute__ ((packed)) validity; + __u8 base_address; + __u8 aux; + __u8 base_lss; + __u8 reserved[7]; + struct DE_eckd_data define_extend; + struct LO_eckd_data locate_record; + __u8 LO_extended_data[4]; +} __attribute__ ((packed)); + struct dasd_eckd_characteristics { __u16 cu_type; struct { @@ -254,7 +275,9 @@ struct dasd_eckd_confdata { } __attribute__ ((packed)) ned; struct { unsigned char flags; /* byte 0 */ - unsigned char res2[7]; /* byte 1- 7 */ + unsigned char res1; /* byte 1 */ + __u16 format; /* byte 2-3 */ + unsigned char res2[4]; /* byte 4-7 */ unsigned char sua_flags; /* byte 8 */ __u8 base_unit_addr; /* byte 9 */ unsigned char res3[22]; /* byte 10-31 */ @@ -343,6 +366,11 @@ struct dasd_eckd_path { __u8 npm; }; +struct dasd_rssd_features { + char feature[256]; +} __attribute__((packed)); + + /* * Perform Subsystem Function - Prepare for Read Subsystem Data */ @@ -365,4 +393,99 @@ struct dasd_psf_ssc_data { unsigned char reserved[59]; } __attribute__((packed)); + +/* + * some structures and definitions for alias handling + */ +struct dasd_unit_address_configuration { + struct { + char ua_type; + char base_ua; + } unit[256]; +} __attribute__((packed)); + + +#define MAX_DEVICES_PER_LCU 256 + +/* flags on the LCU */ +#define NEED_UAC_UPDATE 0x01 +#define UPDATE_PENDING 0x02 + +enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV}; + + +struct alias_root { + struct list_head serverlist; + spinlock_t lock; +}; + +struct alias_server { + struct list_head server; + struct dasd_uid uid; + struct list_head lculist; +}; + +struct summary_unit_check_work_data { + char reason; + struct dasd_device *device; + struct work_struct worker; +}; + +struct read_uac_work_data { + struct dasd_device *device; + struct delayed_work dwork; +}; + +struct alias_lcu { + struct list_head lcu; + struct dasd_uid uid; + enum pavtype pav; + char flags; + spinlock_t lock; + struct list_head grouplist; + struct list_head active_devices; + struct list_head inactive_devices; + struct dasd_unit_address_configuration *uac; + struct summary_unit_check_work_data suc_data; + struct read_uac_work_data ruac_data; + struct dasd_ccw_req *rsu_cqr; +}; + +struct alias_pav_group { + struct list_head group; + struct dasd_uid uid; + struct alias_lcu *lcu; + struct list_head baselist; + struct list_head aliaslist; + struct dasd_device *next; +}; + + +struct dasd_eckd_private { + struct dasd_eckd_characteristics rdc_data; + struct dasd_eckd_confdata conf_data; + struct dasd_eckd_path path_data; + struct eckd_count count_area[5]; + int init_cqr_status; + int uses_cdl; + struct attrib_data_t attrib; /* e.g. cache operations */ + struct dasd_rssd_features features; + + /* alias managemnet */ + struct dasd_uid uid; + struct alias_pav_group *pavgroup; + struct alias_lcu *lcu; + int count; +}; + + + +int dasd_alias_make_device_known_to_lcu(struct dasd_device *); +void dasd_alias_disconnect_device_from_lcu(struct dasd_device *); +int dasd_alias_add_device(struct dasd_device *); +int dasd_alias_remove_device(struct dasd_device *); +struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *); +void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *); +void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *); + #endif /* DASD_ECKD_H */ diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c index 0c081a6..6e53ab6 100644 --- a/drivers/s390/block/dasd_eer.c +++ b/drivers/s390/block/dasd_eer.c @@ -336,7 +336,7 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device, unsigned long flags; struct eerbuffer *eerb; - snss_rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; + snss_rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO; if (snss_rc) data_size = 0; else @@ -404,10 +404,11 @@ void dasd_eer_snss(struct dasd_device *device) set_bit(DASD_FLAG_EER_SNSS, &device->flags); return; } + /* cdev is already locked, can't use dasd_add_request_head */ clear_bit(DASD_FLAG_EER_SNSS, &device->flags); cqr->status = DASD_CQR_QUEUED; - list_add(&cqr->list, &device->ccw_queue); - dasd_schedule_bh(device); + list_add(&cqr->devlist, &device->ccw_queue); + dasd_schedule_device_bh(device); } /* @@ -415,7 +416,7 @@ void dasd_eer_snss(struct dasd_device *device) */ static void dasd_eer_snss_cb(struct dasd_ccw_req *cqr, void *data) { - struct dasd_device *device = cqr->device; + struct dasd_device *device = cqr->startdev; unsigned long flags; dasd_eer_write(device, cqr, DASD_EER_STATECHANGE); @@ -458,7 +459,7 @@ int dasd_eer_enable(struct dasd_device *device) if (!cqr) return -ENOMEM; - cqr->device = device; + cqr->startdev = device; cqr->retries = 255; cqr->expires = 10 * HZ; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); diff --git a/drivers/s390/block/dasd_erp.c b/drivers/s390/block/dasd_erp.c index caa5d91..8f10000 100644 --- a/drivers/s390/block/dasd_erp.c +++ b/drivers/s390/block/dasd_erp.c @@ -46,6 +46,8 @@ dasd_alloc_erp_request(char *magic, int cplength, int datasize, if (cqr == NULL) return ERR_PTR(-ENOMEM); memset(cqr, 0, sizeof(struct dasd_ccw_req)); + INIT_LIST_HEAD(&cqr->devlist); + INIT_LIST_HEAD(&cqr->blocklist); data = (char *) cqr + ((sizeof(struct dasd_ccw_req) + 7L) & -8L); cqr->cpaddr = NULL; if (cplength > 0) { @@ -66,7 +68,7 @@ dasd_alloc_erp_request(char *magic, int cplength, int datasize, } void -dasd_free_erp_request(struct dasd_ccw_req * cqr, struct dasd_device * device) +dasd_free_erp_request(struct dasd_ccw_req *cqr, struct dasd_device * device) { unsigned long flags; @@ -81,11 +83,11 @@ dasd_free_erp_request(struct dasd_ccw_req * cqr, struct dasd_device * device) * dasd_default_erp_action just retries the current cqr */ struct dasd_ccw_req * -dasd_default_erp_action(struct dasd_ccw_req * cqr) +dasd_default_erp_action(struct dasd_ccw_req *cqr) { struct dasd_device *device; - device = cqr->device; + device = cqr->startdev; /* just retry - there is nothing to save ... I got no sense data.... */ if (cqr->retries > 0) { @@ -93,12 +95,12 @@ dasd_default_erp_action(struct dasd_ccw_req * cqr) "default ERP called (%i retries left)", cqr->retries); cqr->lpm = LPM_ANYPATH; - cqr->status = DASD_CQR_QUEUED; + cqr->status = DASD_CQR_FILLED; } else { DEV_MESSAGE (KERN_WARNING, device, "%s", "default ERP called (NO retry left)"); cqr->status = DASD_CQR_FAILED; - cqr->stopclk = get_clock (); + cqr->stopclk = get_clock(); } return cqr; } /* end dasd_default_erp_action */ @@ -117,15 +119,12 @@ dasd_default_erp_action(struct dasd_ccw_req * cqr) * RETURN VALUES * cqr pointer to the original CQR */ -struct dasd_ccw_req * -dasd_default_erp_postaction(struct dasd_ccw_req * cqr) +struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *cqr) { - struct dasd_device *device; int success; BUG_ON(cqr->refers == NULL || cqr->function == NULL); - device = cqr->device; success = cqr->status == DASD_CQR_DONE; /* free all ERPs - but NOT the original cqr */ @@ -133,10 +132,10 @@ dasd_default_erp_postaction(struct dasd_ccw_req * cqr) struct dasd_ccw_req *refers; refers = cqr->refers; - /* remove the request from the device queue */ - list_del(&cqr->list); + /* remove the request from the block queue */ + list_del(&cqr->blocklist); /* free the finished erp request */ - dasd_free_erp_request(cqr, device); + dasd_free_erp_request(cqr, cqr->memdev); cqr = refers; } @@ -157,7 +156,7 @@ dasd_log_sense(struct dasd_ccw_req *cqr, struct irb *irb) { struct dasd_device *device; - device = cqr->device; + device = cqr->startdev; /* dump sense data */ if (device->discipline && device->discipline->dump_sense) device->discipline->dump_sense(device, cqr, irb); diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index 1d95822..d13ea05 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -117,6 +117,7 @@ locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, static int dasd_fba_check_characteristics(struct dasd_device *device) { + struct dasd_block *block; struct dasd_fba_private *private; struct ccw_device *cdev = device->cdev; void *rdc_data; @@ -133,6 +134,16 @@ dasd_fba_check_characteristics(struct dasd_device *device) } device->private = (void *) private; } + block = dasd_alloc_block(); + if (IS_ERR(block)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "could not allocate dasd block structure"); + kfree(device->private); + return PTR_ERR(block); + } + device->block = block; + block->base = device; + /* Read Device Characteristics */ rdc_data = (void *) &(private->rdc_data); rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32); @@ -155,60 +166,37 @@ dasd_fba_check_characteristics(struct dasd_device *device) return 0; } -static int -dasd_fba_do_analysis(struct dasd_device *device) +static int dasd_fba_do_analysis(struct dasd_block *block) { struct dasd_fba_private *private; int sb, rc; - private = (struct dasd_fba_private *) device->private; + private = (struct dasd_fba_private *) block->base->private; rc = dasd_check_blocksize(private->rdc_data.blk_size); if (rc) { - DEV_MESSAGE(KERN_INFO, device, "unknown blocksize %d", + DEV_MESSAGE(KERN_INFO, block->base, "unknown blocksize %d", private->rdc_data.blk_size); return rc; } - device->blocks = private->rdc_data.blk_bdsa; - device->bp_block = private->rdc_data.blk_size; - device->s2b_shift = 0; /* bits to shift 512 to get a block */ + block->blocks = private->rdc_data.blk_bdsa; + block->bp_block = private->rdc_data.blk_size; + block->s2b_shift = 0; /* bits to shift 512 to get a block */ for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) - device->s2b_shift++; + block->s2b_shift++; return 0; } -static int -dasd_fba_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) +static int dasd_fba_fill_geometry(struct dasd_block *block, + struct hd_geometry *geo) { - if (dasd_check_blocksize(device->bp_block) != 0) + if (dasd_check_blocksize(block->bp_block) != 0) return -EINVAL; - geo->cylinders = (device->blocks << device->s2b_shift) >> 10; + geo->cylinders = (block->blocks << block->s2b_shift) >> 10; geo->heads = 16; - geo->sectors = 128 >> device->s2b_shift; + geo->sectors = 128 >> block->s2b_shift; return 0; } -static dasd_era_t -dasd_fba_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) -{ - struct dasd_device *device; - struct ccw_device *cdev; - - device = (struct dasd_device *) cqr->device; - if (irb->scsw.cstat == 0x00 && - irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) - return dasd_era_none; - - cdev = device->cdev; - switch (cdev->id.dev_type) { - case 0x3370: - return dasd_3370_erp_examine(cqr, irb); - case 0x9336: - return dasd_9336_erp_examine(cqr, irb); - default: - return dasd_era_recover; - } -} - static dasd_erp_fn_t dasd_fba_erp_action(struct dasd_ccw_req * cqr) { @@ -221,13 +209,34 @@ dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) if (cqr->function == dasd_default_erp_action) return dasd_default_erp_postaction; - DEV_MESSAGE(KERN_WARNING, cqr->device, "unknown ERP action %p", + DEV_MESSAGE(KERN_WARNING, cqr->startdev, "unknown ERP action %p", cqr->function); return NULL; } -static struct dasd_ccw_req * -dasd_fba_build_cp(struct dasd_device * device, struct request *req) +static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device, + struct irb *irb) +{ + char mask; + + /* first of all check for state change pending interrupt */ + mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; + if ((irb->scsw.dstat & mask) == mask) { + dasd_generic_handle_state_change(device); + return; + } + + /* check for unsolicited interrupts */ + DEV_MESSAGE(KERN_DEBUG, device, "%s", + "unsolicited interrupt received"); + device->discipline->dump_sense(device, NULL, irb); + dasd_schedule_device_bh(device); + return; +}; + +static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev, + struct dasd_block *block, + struct request *req) { struct dasd_fba_private *private; unsigned long *idaws; @@ -242,17 +251,17 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) unsigned int blksize, off; unsigned char cmd; - private = (struct dasd_fba_private *) device->private; + private = (struct dasd_fba_private *) block->base->private; if (rq_data_dir(req) == READ) { cmd = DASD_FBA_CCW_READ; } else if (rq_data_dir(req) == WRITE) { cmd = DASD_FBA_CCW_WRITE; } else return ERR_PTR(-EINVAL); - blksize = device->bp_block; + blksize = block->bp_block; /* Calculate record id of first and last block. */ - first_rec = req->sector >> device->s2b_shift; - last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; + first_rec = req->sector >> block->s2b_shift; + last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift; /* Check struct bio and count the number of blocks for the request. */ count = 0; cidaw = 0; @@ -260,7 +269,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) if (bv->bv_len & (blksize - 1)) /* Fba can only do full blocks. */ return ERR_PTR(-EINVAL); - count += bv->bv_len >> (device->s2b_shift + 9); + count += bv->bv_len >> (block->s2b_shift + 9); #if defined(CONFIG_64BIT) if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) cidaw += bv->bv_len / blksize; @@ -284,13 +293,13 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) } /* Allocate the ccw request. */ cqr = dasd_smalloc_request(dasd_fba_discipline.name, - cplength, datasize, device); + cplength, datasize, memdev); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; /* First ccw is define extent. */ define_extent(ccw++, cqr->data, rq_data_dir(req), - device->bp_block, req->sector, req->nr_sectors); + block->bp_block, req->sector, req->nr_sectors); /* Build locate_record + read/write ccws. */ idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); LO_data = (struct LO_fba_data *) (idaws + cidaw); @@ -326,7 +335,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) ccw[-1].flags |= CCW_FLAG_CC; } ccw->cmd_code = cmd; - ccw->count = device->bp_block; + ccw->count = block->bp_block; if (idal_is_needed(dst, blksize)) { ccw->cda = (__u32)(addr_t) idaws; ccw->flags = CCW_FLAG_IDA; @@ -342,7 +351,9 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) } if (req->cmd_flags & REQ_FAILFAST) set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); - cqr->device = device; + cqr->startdev = memdev; + cqr->memdev = memdev; + cqr->block = block; cqr->expires = 5 * 60 * HZ; /* 5 minutes */ cqr->retries = 32; cqr->buildclk = get_clock(); @@ -363,8 +374,8 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) if (!dasd_page_cache) goto out; - private = (struct dasd_fba_private *) cqr->device->private; - blksize = cqr->device->bp_block; + private = (struct dasd_fba_private *) cqr->block->base->private; + blksize = cqr->block->bp_block; ccw = cqr->cpaddr; /* Skip over define extent & locate record. */ ccw++; @@ -394,10 +405,15 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) } out: status = cqr->status == DASD_CQR_DONE; - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); return status; } +static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) +{ + cqr->status = DASD_CQR_FILLED; +}; + static int dasd_fba_fill_info(struct dasd_device * device, struct dasd_information2_t * info) @@ -546,9 +562,10 @@ static struct dasd_discipline dasd_fba_discipline = { .fill_geometry = dasd_fba_fill_geometry, .start_IO = dasd_start_IO, .term_IO = dasd_term_IO, - .examine_error = dasd_fba_examine_error, + .handle_terminated_request = dasd_fba_handle_terminated_request, .erp_action = dasd_fba_erp_action, .erp_postaction = dasd_fba_erp_postaction, + .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt, .build_cp = dasd_fba_build_cp, .free_cp = dasd_fba_free_cp, .dump_sense = dasd_fba_dump_sense, diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c index 47ba446..aee6565 100644 --- a/drivers/s390/block/dasd_genhd.c +++ b/drivers/s390/block/dasd_genhd.c @@ -25,14 +25,15 @@ /* * Allocate and register gendisk structure for device. */ -int -dasd_gendisk_alloc(struct dasd_device *device) +int dasd_gendisk_alloc(struct dasd_block *block) { struct gendisk *gdp; + struct dasd_device *base; int len; /* Make sure the minor for this device exists. */ - if (device->devindex >= DASD_PER_MAJOR) + base = block->base; + if (base->devindex >= DASD_PER_MAJOR) return -EBUSY; gdp = alloc_disk(1 << DASD_PARTN_BITS); @@ -41,9 +42,9 @@ dasd_gendisk_alloc(struct dasd_device *device) /* Initialize gendisk structure. */ gdp->major = DASD_MAJOR; - gdp->first_minor = device->devindex << DASD_PARTN_BITS; + gdp->first_minor = base->devindex << DASD_PARTN_BITS; gdp->fops = &dasd_device_operations; - gdp->driverfs_dev = &device->cdev->dev; + gdp->driverfs_dev = &base->cdev->dev; /* * Set device name. @@ -53,53 +54,51 @@ dasd_gendisk_alloc(struct dasd_device *device) * dasdaaaa - dasdzzzz : 456976 devices, added up = 475252 */ len = sprintf(gdp->disk_name, "dasd"); - if (device->devindex > 25) { - if (device->devindex > 701) { - if (device->devindex > 18277) + if (base->devindex > 25) { + if (base->devindex > 701) { + if (base->devindex > 18277) len += sprintf(gdp->disk_name + len, "%c", - 'a'+(((device->devindex-18278) + 'a'+(((base->devindex-18278) /17576)%26)); len += sprintf(gdp->disk_name + len, "%c", - 'a'+(((device->devindex-702)/676)%26)); + 'a'+(((base->devindex-702)/676)%26)); } len += sprintf(gdp->disk_name + len, "%c", - 'a'+(((device->devindex-26)/26)%26)); + 'a'+(((base->devindex-26)/26)%26)); } - len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26)); + len += sprintf(gdp->disk_name + len, "%c", 'a'+(base->devindex%26)); - if (device->features & DASD_FEATURE_READONLY) + if (block->base->features & DASD_FEATURE_READONLY) set_disk_ro(gdp, 1); - gdp->private_data = device; - gdp->queue = device->request_queue; - device->gdp = gdp; - set_capacity(device->gdp, 0); - add_disk(device->gdp); + gdp->private_data = block; + gdp->queue = block->request_queue; + block->gdp = gdp; + set_capacity(block->gdp, 0); + add_disk(block->gdp); return 0; } /* * Unregister and free gendisk structure for device. */ -void -dasd_gendisk_free(struct dasd_device *device) +void dasd_gendisk_free(struct dasd_block *block) { - if (device->gdp) { - del_gendisk(device->gdp); - device->gdp->queue = NULL; - put_disk(device->gdp); - device->gdp = NULL; + if (block->gdp) { + del_gendisk(block->gdp); + block->gdp->queue = NULL; + put_disk(block->gdp); + block->gdp = NULL; } } /* * Trigger a partition detection. */ -int -dasd_scan_partitions(struct dasd_device * device) +int dasd_scan_partitions(struct dasd_block *block) { struct block_device *bdev; - bdev = bdget_disk(device->gdp, 0); + bdev = bdget_disk(block->gdp, 0); if (!bdev || blkdev_get(bdev, FMODE_READ, 1) < 0) return -ENODEV; /* @@ -117,7 +116,7 @@ dasd_scan_partitions(struct dasd_device * device) * is why the assignment to device->bdev is done AFTER * the BLKRRPART ioctl. */ - device->bdev = bdev; + block->bdev = bdev; return 0; } @@ -125,8 +124,7 @@ dasd_scan_partitions(struct dasd_device * device) * Remove all inodes in the system for a device, delete the * partitions and make device unusable by setting its size to zero. */ -void -dasd_destroy_partitions(struct dasd_device * device) +void dasd_destroy_partitions(struct dasd_block *block) { /* The two structs have 168/176 byte on 31/64 bit. */ struct blkpg_partition bpart; @@ -137,8 +135,8 @@ dasd_destroy_partitions(struct dasd_device * device) * Get the bdev pointer from the device structure and clear * device->bdev to lower the offline open_count limit again. */ - bdev = device->bdev; - device->bdev = NULL; + bdev = block->bdev; + block->bdev = NULL; /* * See fs/partition/check.c:delete_partition @@ -149,17 +147,16 @@ dasd_destroy_partitions(struct dasd_device * device) memset(&barg, 0, sizeof(struct blkpg_ioctl_arg)); barg.data = (void __force __user *) &bpart; barg.op = BLKPG_DEL_PARTITION; - for (bpart.pno = device->gdp->minors - 1; bpart.pno > 0; bpart.pno--) + for (bpart.pno = block->gdp->minors - 1; bpart.pno > 0; bpart.pno--) ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg); - invalidate_partition(device->gdp, 0); + invalidate_partition(block->gdp, 0); /* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */ blkdev_put(bdev); - set_capacity(device->gdp, 0); + set_capacity(block->gdp, 0); } -int -dasd_gendisk_init(void) +int dasd_gendisk_init(void) { int rc; @@ -174,8 +171,7 @@ dasd_gendisk_init(void) return 0; } -void -dasd_gendisk_exit(void) +void dasd_gendisk_exit(void) { unregister_blkdev(DASD_MAJOR, "dasd"); } diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index d427dae..44b2984 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -64,13 +64,7 @@ * SECTION: Type definitions */ struct dasd_device; - -typedef enum { - dasd_era_fatal = -1, /* no chance to recover */ - dasd_era_none = 0, /* don't recover, everything alright */ - dasd_era_msg = 1, /* don't recover, just report... */ - dasd_era_recover = 2 /* recovery action recommended */ -} dasd_era_t; +struct dasd_block; /* BIT DEFINITIONS FOR SENSE DATA */ #define DASD_SENSE_BIT_0 0x80 @@ -151,19 +145,22 @@ do { \ struct dasd_ccw_req { unsigned int magic; /* Eye catcher */ - struct list_head list; /* list_head for request queueing. */ + struct list_head devlist; /* for dasd_device request queue */ + struct list_head blocklist; /* for dasd_block request queue */ /* Where to execute what... */ - struct dasd_device *device; /* device the request is for */ + struct dasd_block *block; /* the originating block device */ + struct dasd_device *memdev; /* the device used to allocate this */ + struct dasd_device *startdev; /* device the request is started on */ struct ccw1 *cpaddr; /* address of channel program */ - char status; /* status of this request */ + char status; /* status of this request */ short retries; /* A retry counter */ unsigned long flags; /* flags of this request */ /* ... and how */ unsigned long starttime; /* jiffies time of request start */ int expires; /* expiration period in jiffies */ - char lpm; /* logical path mask */ + char lpm; /* logical path mask */ void *data; /* pointer to data area */ /* these are important for recovering erroneous requests */ @@ -178,20 +175,27 @@ struct dasd_ccw_req { unsigned long long endclk; /* TOD-clock of request termination */ /* Callback that is called after reaching final status. */ - void (*callback)(struct dasd_ccw_req *, void *data); - void *callback_data; + void (*callback)(struct dasd_ccw_req *, void *data); + void *callback_data; }; /* * dasd_ccw_req -> status can be: */ -#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ -#define DASD_CQR_QUEUED 0x01 /* request is queued to be processed */ -#define DASD_CQR_IN_IO 0x02 /* request is currently in IO */ -#define DASD_CQR_DONE 0x03 /* request is completed successfully */ -#define DASD_CQR_ERROR 0x04 /* request is completed with error */ -#define DASD_CQR_FAILED 0x05 /* request is finally failed */ -#define DASD_CQR_CLEAR 0x06 /* request is clear pending */ +#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ +#define DASD_CQR_DONE 0x01 /* request is completed successfully */ +#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ +#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ +#define DASD_CQR_FAILED 0x04 /* request is finally failed */ +#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ + +#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ +#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ +#define DASD_CQR_ERROR 0x82 /* request is completed with error */ +#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ +#define DASD_CQR_CLEARED 0x84 /* request was cleared */ +#define DASD_CQR_SUCCESS 0x85 /* request was successfull */ + /* per dasd_ccw_req flags */ #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ @@ -214,52 +218,71 @@ struct dasd_discipline { struct list_head list; /* used for list of disciplines */ - /* - * Device recognition functions. check_device is used to verify - * the sense data and the information returned by read device - * characteristics. It returns 0 if the discipline can be used - * for the device in question. - * do_analysis is used in the step from device state "basic" to - * state "accept". It returns 0 if the device can be made ready, - * it returns -EMEDIUMTYPE if the device can't be made ready or - * -EAGAIN if do_analysis started a ccw that needs to complete - * before the analysis may be repeated. - */ - int (*check_device)(struct dasd_device *); - int (*do_analysis) (struct dasd_device *); - - /* - * Device operation functions. build_cp creates a ccw chain for - * a block device request, start_io starts the request and - * term_IO cancels it (e.g. in case of a timeout). format_device - * returns a ccw chain to be used to format the device. - */ + /* + * Device recognition functions. check_device is used to verify + * the sense data and the information returned by read device + * characteristics. It returns 0 if the discipline can be used + * for the device in question. uncheck_device is called during + * device shutdown to deregister a device from its discipline. + */ + int (*check_device) (struct dasd_device *); + void (*uncheck_device) (struct dasd_device *); + + /* + * do_analysis is used in the step from device state "basic" to + * state "accept". It returns 0 if the device can be made ready, + * it returns -EMEDIUMTYPE if the device can't be made ready or + * -EAGAIN if do_analysis started a ccw that needs to complete + * before the analysis may be repeated. + */ + int (*do_analysis) (struct dasd_block *); + + /* + * Last things to do when a device is set online, and first things + * when it is set offline. + */ + int (*ready_to_online) (struct dasd_device *); + int (*online_to_ready) (struct dasd_device *); + + /* + * Device operation functions. build_cp creates a ccw chain for + * a block device request, start_io starts the request and + * term_IO cancels it (e.g. in case of a timeout). format_device + * returns a ccw chain to be used to format the device. + * handle_terminated_request allows to examine a cqr and prepare + * it for retry. + */ struct dasd_ccw_req *(*build_cp) (struct dasd_device *, + struct dasd_block *, struct request *); int (*start_IO) (struct dasd_ccw_req *); int (*term_IO) (struct dasd_ccw_req *); + void (*handle_terminated_request) (struct dasd_ccw_req *); struct dasd_ccw_req *(*format_device) (struct dasd_device *, struct format_data_t *); int (*free_cp) (struct dasd_ccw_req *, struct request *); - /* - * Error recovery functions. examine_error() returns a value that - * indicates what to do for an error condition. If examine_error() + + /* + * Error recovery functions. examine_error() returns a value that + * indicates what to do for an error condition. If examine_error() * returns 'dasd_era_recover' erp_action() is called to create a - * special error recovery ccw. erp_postaction() is called after - * an error recovery ccw has finished its execution. dump_sense - * is called for every error condition to print the sense data - * to the console. - */ - dasd_era_t(*examine_error) (struct dasd_ccw_req *, struct irb *); + * special error recovery ccw. erp_postaction() is called after + * an error recovery ccw has finished its execution. dump_sense + * is called for every error condition to print the sense data + * to the console. + */ dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, struct irb *); + void (*handle_unsolicited_interrupt) (struct dasd_device *, + struct irb *); + /* i/o control functions. */ - int (*fill_geometry) (struct dasd_device *, struct hd_geometry *); + int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); - int (*ioctl) (struct dasd_device *, unsigned int, void __user *); + int (*ioctl) (struct dasd_block *, unsigned int, void __user *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; @@ -267,12 +290,18 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer; /* * Unique identifier for dasd device. */ +#define UA_NOT_CONFIGURED 0x00 +#define UA_BASE_DEVICE 0x01 +#define UA_BASE_PAV_ALIAS 0x02 +#define UA_HYPER_PAV_ALIAS 0x03 + struct dasd_uid { - __u8 alias; + __u8 type; char vendor[4]; char serial[15]; __u16 ssid; - __u8 unit_addr; + __u8 real_unit_addr; + __u8 base_unit_addr; }; /* @@ -293,14 +322,9 @@ struct dasd_uid { struct dasd_device { /* Block device stuff. */ - struct gendisk *gdp; - struct request_queue *request_queue; - spinlock_t request_queue_lock; - struct block_device *bdev; + struct dasd_block *block; + unsigned int devindex; - unsigned long blocks; /* size of volume in blocks */ - unsigned int bp_block; /* bytes per block */ - unsigned int s2b_shift; /* log2 (bp_block/512) */ unsigned long flags; /* per device flags */ unsigned short features; /* copy of devmap-features (read-only!) */ @@ -316,9 +340,8 @@ struct dasd_device { int state, target; int stopped; /* device (ccw_device_start) was stopped */ - /* Open and reference count. */ + /* reference count. */ atomic_t ref_count; - atomic_t open_count; /* ccw queue and memory for static ccw/erp buffers. */ struct list_head ccw_queue; @@ -337,20 +360,45 @@ struct dasd_device { struct ccw_device *cdev; + /* hook for alias management */ + struct list_head alias_list; +}; + +struct dasd_block { + /* Block device stuff. */ + struct gendisk *gdp; + struct request_queue *request_queue; + spinlock_t request_queue_lock; + struct block_device *bdev; + atomic_t open_count; + + unsigned long blocks; /* size of volume in blocks */ + unsigned int bp_block; /* bytes per block */ + unsigned int s2b_shift; /* log2 (bp_block/512) */ + + struct dasd_device *base; + struct list_head ccw_queue; + spinlock_t queue_lock; + + atomic_t tasklet_scheduled; + struct tasklet_struct tasklet; + struct timer_list timer; + #ifdef CONFIG_DASD_PROFILE struct dasd_profile_info_t profile; #endif }; + + /* reasons why device (ccw_device_start) was stopped */ #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ #define DASD_STOPPED_PENDING 4 /* long busy */ #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ -#define DASD_STOPPED_DC_EIO 16 /* disconnected, return -EIO */ +#define DASD_STOPPED_SU 16 /* summary unit check handling */ /* per device flags */ -#define DASD_FLAG_DSC_ERROR 2 /* return -EIO when disconnected */ #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ @@ -489,6 +537,9 @@ dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) struct dasd_device *dasd_alloc_device(void); void dasd_free_device(struct dasd_device *); +struct dasd_block *dasd_alloc_block(void); +void dasd_free_block(struct dasd_block *); + void dasd_enable_device(struct dasd_device *); void dasd_set_target_state(struct dasd_device *, int); void dasd_kick_device(struct dasd_device *); @@ -497,18 +548,23 @@ void dasd_add_request_head(struct dasd_ccw_req *); void dasd_add_request_tail(struct dasd_ccw_req *); int dasd_start_IO(struct dasd_ccw_req *); int dasd_term_IO(struct dasd_ccw_req *); -void dasd_schedule_bh(struct dasd_device *); +void dasd_schedule_device_bh(struct dasd_device *); +void dasd_schedule_block_bh(struct dasd_block *); int dasd_sleep_on(struct dasd_ccw_req *); int dasd_sleep_on_immediatly(struct dasd_ccw_req *); int dasd_sleep_on_interruptible(struct dasd_ccw_req *); -void dasd_set_timer(struct dasd_device *, int); -void dasd_clear_timer(struct dasd_device *); +void dasd_device_set_timer(struct dasd_device *, int); +void dasd_device_clear_timer(struct dasd_device *); +void dasd_block_set_timer(struct dasd_block *, int); +void dasd_block_clear_timer(struct dasd_block *); int dasd_cancel_req(struct dasd_ccw_req *); +int dasd_flush_device_queue(struct dasd_device *); int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); void dasd_generic_remove (struct ccw_device *cdev); int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); int dasd_generic_set_offline (struct ccw_device *cdev); int dasd_generic_notify(struct ccw_device *, int); +void dasd_generic_handle_state_change(struct dasd_device *); int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int); @@ -542,10 +598,10 @@ int dasd_busid_known(char *); /* externals in dasd_gendisk.c */ int dasd_gendisk_init(void); void dasd_gendisk_exit(void); -int dasd_gendisk_alloc(struct dasd_device *); -void dasd_gendisk_free(struct dasd_device *); -int dasd_scan_partitions(struct dasd_device *); -void dasd_destroy_partitions(struct dasd_device *); +int dasd_gendisk_alloc(struct dasd_block *); +void dasd_gendisk_free(struct dasd_block *); +int dasd_scan_partitions(struct dasd_block *); +void dasd_destroy_partitions(struct dasd_block *); /* externals in dasd_ioctl.c */ int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); @@ -563,20 +619,9 @@ struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); void dasd_log_sense(struct dasd_ccw_req *, struct irb *); -/* externals in dasd_3370_erp.c */ -dasd_era_t dasd_3370_erp_examine(struct dasd_ccw_req *, struct irb *); - /* externals in dasd_3990_erp.c */ -dasd_era_t dasd_3990_erp_examine(struct dasd_ccw_req *, struct irb *); struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); -/* externals in dasd_9336_erp.c */ -dasd_era_t dasd_9336_erp_examine(struct dasd_ccw_req *, struct irb *); - -/* externals in dasd_9336_erp.c */ -dasd_era_t dasd_9343_erp_examine(struct dasd_ccw_req *, struct irb *); -struct dasd_ccw_req *dasd_9343_erp_action(struct dasd_ccw_req *); - /* externals in dasd_eer.c */ #ifdef CONFIG_DASD_EER int dasd_eer_init(void); diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 672eb0a..91a6463 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -38,15 +38,15 @@ dasd_ioctl_api_version(void __user *argp) static int dasd_ioctl_enable(struct block_device *bdev) { - struct dasd_device *device = bdev->bd_disk->private_data; + struct dasd_block *block = bdev->bd_disk->private_data; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - dasd_enable_device(device); + dasd_enable_device(block->base); /* Formatting the dasd device can change the capacity. */ mutex_lock(&bdev->bd_mutex); - i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9); + i_size_write(bdev->bd_inode, (loff_t)get_capacity(block->gdp) << 9); mutex_unlock(&bdev->bd_mutex); return 0; } @@ -58,7 +58,7 @@ dasd_ioctl_enable(struct block_device *bdev) static int dasd_ioctl_disable(struct block_device *bdev) { - struct dasd_device *device = bdev->bd_disk->private_data; + struct dasd_block *block = bdev->bd_disk->private_data; if (!capable(CAP_SYS_ADMIN)) return -EACCES; @@ -71,7 +71,7 @@ dasd_ioctl_disable(struct block_device *bdev) * using the BIODASDFMT ioctl. Therefore the correct state for the * device is DASD_STATE_BASIC that allows to do basic i/o. */ - dasd_set_target_state(device, DASD_STATE_BASIC); + dasd_set_target_state(block->base, DASD_STATE_BASIC); /* * Set i_size to zero, since read, write, etc. check against this * value. @@ -85,19 +85,19 @@ dasd_ioctl_disable(struct block_device *bdev) /* * Quiesce device. */ -static int -dasd_ioctl_quiesce(struct dasd_device *device) +static int dasd_ioctl_quiesce(struct dasd_block *block) { unsigned long flags; + struct dasd_device *base; + base = block->base; if (!capable (CAP_SYS_ADMIN)) return -EACCES; - DEV_MESSAGE (KERN_DEBUG, device, "%s", - "Quiesce IO on device"); - spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - device->stopped |= DASD_STOPPED_QUIESCE; - spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + DEV_MESSAGE(KERN_DEBUG, base, "%s", "Quiesce IO on device"); + spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); + base->stopped |= DASD_STOPPED_QUIESCE; + spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); return 0; } @@ -105,22 +105,21 @@ dasd_ioctl_quiesce(struct dasd_device *device) /* * Quiesce device. */ -static int -dasd_ioctl_resume(struct dasd_device *device) +static int dasd_ioctl_resume(struct dasd_block *block) { unsigned long flags; + struct dasd_device *base; + base = block->base; if (!capable (CAP_SYS_ADMIN)) return -EACCES; - DEV_MESSAGE (KERN_DEBUG, device, "%s", - "resume IO on device"); - - spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - device->stopped &= ~DASD_STOPPED_QUIESCE; - spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + DEV_MESSAGE(KERN_DEBUG, base, "%s", "resume IO on device"); + spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); + base->stopped &= ~DASD_STOPPED_QUIESCE; + spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); - dasd_schedule_bh (device); + dasd_schedule_block_bh(block); return 0; } @@ -130,22 +129,23 @@ dasd_ioctl_resume(struct dasd_device *device) * commands to format a single unit of the device. In terms of the ECKD * devices this means CCWs are generated to format a single track. */ -static int -dasd_format(struct dasd_device * device, struct format_data_t * fdata) +static int dasd_format(struct dasd_block *block, struct format_data_t *fdata) { struct dasd_ccw_req *cqr; + struct dasd_device *base; int rc; - if (device->discipline->format_device == NULL) + base = block->base; + if (base->discipline->format_device == NULL) return -EPERM; - if (device->state != DASD_STATE_BASIC) { - DEV_MESSAGE(KERN_WARNING, device, "%s", + if (base->state != DASD_STATE_BASIC) { + DEV_MESSAGE(KERN_WARNING, base, "%s", "dasd_format: device is not disabled! "); return -EBUSY; } - DBF_DEV_EVENT(DBF_NOTICE, device, + DBF_DEV_EVENT(DBF_NOTICE, base, "formatting units %d to %d (%d B blocks) flags %d", fdata->start_unit, fdata->stop_unit, fdata->blksize, fdata->intensity); @@ -156,20 +156,20 @@ dasd_format(struct dasd_device * device, struct format_data_t * fdata) * enabling the device later. */ if (fdata->start_unit == 0) { - struct block_device *bdev = bdget_disk(device->gdp, 0); + struct block_device *bdev = bdget_disk(block->gdp, 0); bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); bdput(bdev); } while (fdata->start_unit <= fdata->stop_unit) { - cqr = device->discipline->format_device(device, fdata); + cqr = base->discipline->format_device(base, fdata); if (IS_ERR(cqr)) return PTR_ERR(cqr); rc = dasd_sleep_on_interruptible(cqr); - dasd_sfree_request(cqr, cqr->device); + dasd_sfree_request(cqr, cqr->memdev); if (rc) { if (rc != -ERESTARTSYS) - DEV_MESSAGE(KERN_ERR, device, + DEV_MESSAGE(KERN_ERR, base, " Formatting of unit %d failed " "with rc = %d", fdata->start_unit, rc); @@ -186,7 +186,7 @@ dasd_format(struct dasd_device * device, struct format_data_t * fdata) static int dasd_ioctl_format(struct block_device *bdev, void __user *argp) { - struct dasd_device *device = bdev->bd_disk->private_data; + struct dasd_block *block = bdev->bd_disk->private_data; struct format_data_t fdata; if (!capable(CAP_SYS_ADMIN)) @@ -194,51 +194,47 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp) if (!argp) return -EINVAL; - if (device->features & DASD_FEATURE_READONLY) + if (block->base->features & DASD_FEATURE_READONLY) return -EROFS; if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) return -EFAULT; if (bdev != bdev->bd_contains) { - DEV_MESSAGE(KERN_WARNING, device, "%s", + DEV_MESSAGE(KERN_WARNING, block->base, "%s", "Cannot low-level format a partition"); return -EINVAL; } - return dasd_format(device, &fdata); + return dasd_format(block, &fdata); } #ifdef CONFIG_DASD_PROFILE /* * Reset device profile information */ -static int -dasd_ioctl_reset_profile(struct dasd_device *device) +static int dasd_ioctl_reset_profile(struct dasd_block *block) { - memset(&device->profile, 0, sizeof (struct dasd_profile_info_t)); + memset(&block->profile, 0, sizeof(struct dasd_profile_info_t)); return 0; } /* * Return device profile information */ -static int -dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp) +static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) { if (dasd_profile_level == DASD_PROFILE_OFF) return -EIO; - if (copy_to_user(argp, &device->profile, - sizeof (struct dasd_profile_info_t))) + if (copy_to_user(argp, &block->profile, + sizeof(struct dasd_profile_info_t))) return -EFAULT; return 0; } #else -static int -dasd_ioctl_reset_profile(struct dasd_device *device) +static int dasd_ioctl_reset_profile(struct dasd_block *block) { return -ENOSYS; } -static int -dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp) +static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) { return -ENOSYS; } @@ -247,87 +243,88 @@ dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp) /* * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. */ -static int -dasd_ioctl_information(struct dasd_device *device, - unsigned int cmd, void __user *argp) +static int dasd_ioctl_information(struct dasd_block *block, + unsigned int cmd, void __user *argp) { struct dasd_information2_t *dasd_info; unsigned long flags; int rc; + struct dasd_device *base; struct ccw_device *cdev; struct ccw_dev_id dev_id; - if (!device->discipline->fill_info) + base = block->base; + if (!base->discipline->fill_info) return -EINVAL; dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); if (dasd_info == NULL) return -ENOMEM; - rc = device->discipline->fill_info(device, dasd_info); + rc = base->discipline->fill_info(base, dasd_info); if (rc) { kfree(dasd_info); return rc; } - cdev = device->cdev; + cdev = base->cdev; ccw_device_get_id(cdev, &dev_id); dasd_info->devno = dev_id.devno; - dasd_info->schid = _ccw_device_get_subchannel_number(device->cdev); + dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev); dasd_info->cu_type = cdev->id.cu_type; dasd_info->cu_model = cdev->id.cu_model; dasd_info->dev_type = cdev->id.dev_type; dasd_info->dev_model = cdev->id.dev_model; - dasd_info->status = device->state; + dasd_info->status = base->state; /* * The open_count is increased for every opener, that includes * the blkdev_get in dasd_scan_partitions. * This must be hidden from user-space. */ - dasd_info->open_count = atomic_read(&device->open_count); - if (!device->bdev) + dasd_info->open_count = atomic_read(&block->open_count); + if (!block->bdev) dasd_info->open_count++; /* * check if device is really formatted * LDL / CDL was returned by 'fill_info' */ - if ((device->state < DASD_STATE_READY) || - (dasd_check_blocksize(device->bp_block))) + if ((base->state < DASD_STATE_READY) || + (dasd_check_blocksize(block->bp_block))) dasd_info->format = DASD_FORMAT_NONE; dasd_info->features |= - ((device->features & DASD_FEATURE_READONLY) != 0); + ((base->features & DASD_FEATURE_READONLY) != 0); - if (device->discipline) - memcpy(dasd_info->type, device->discipline->name, 4); + if (base->discipline) + memcpy(dasd_info->type, base->discipline->name, 4); else memcpy(dasd_info->type, "none", 4); - if (device->request_queue->request_fn) { + if (block->request_queue->request_fn) { struct list_head *l; #ifdef DASD_EXTENDED_PROFILING { struct list_head *l; - spin_lock_irqsave(&device->lock, flags); - list_for_each(l, &device->request_queue->queue_head) + spin_lock_irqsave(&block->lock, flags); + list_for_each(l, &block->request_queue->queue_head) dasd_info->req_queue_len++; - spin_unlock_irqrestore(&device->lock, flags); + spin_unlock_irqrestore(&block->lock, flags); } #endif /* DASD_EXTENDED_PROFILING */ - spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - list_for_each(l, &device->ccw_queue) + spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); + list_for_each(l, &base->ccw_queue) dasd_info->chanq_len++; - spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), + spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); } rc = 0; if (copy_to_user(argp, dasd_info, ((cmd == (unsigned int) BIODASDINFO2) ? - sizeof (struct dasd_information2_t) : - sizeof (struct dasd_information_t)))) + sizeof(struct dasd_information2_t) : + sizeof(struct dasd_information_t)))) rc = -EFAULT; kfree(dasd_info); return rc; @@ -339,7 +336,7 @@ dasd_ioctl_information(struct dasd_device *device, static int dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) { - struct dasd_device *device = bdev->bd_disk->private_data; + struct dasd_block *block = bdev->bd_disk->private_data; int intval; if (!capable(CAP_SYS_ADMIN)) @@ -351,11 +348,10 @@ dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) return -EFAULT; set_disk_ro(bdev->bd_disk, intval); - return dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); + return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval); } -static int -dasd_ioctl_readall_cmb(struct dasd_device *device, unsigned int cmd, +static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, unsigned long arg) { struct cmbdata __user *argp = (void __user *) arg; @@ -363,7 +359,7 @@ dasd_ioctl_readall_cmb(struct dasd_device *device, unsigned int cmd, struct cmbdata data; int ret; - ret = cmf_readall(device->cdev, &data); + ret = cmf_readall(block->base->cdev, &data); if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) return -EFAULT; return ret; @@ -374,10 +370,10 @@ dasd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct block_device *bdev = inode->i_bdev; - struct dasd_device *device = bdev->bd_disk->private_data; + struct dasd_block *block = bdev->bd_disk->private_data; void __user *argp = (void __user *)arg; - if (!device) + if (!block) return -ENODEV; if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { @@ -391,33 +387,33 @@ dasd_ioctl(struct inode *inode, struct file *file, case BIODASDENABLE: return dasd_ioctl_enable(bdev); case BIODASDQUIESCE: - return dasd_ioctl_quiesce(device); + return dasd_ioctl_quiesce(block); case BIODASDRESUME: - return dasd_ioctl_resume(device); + return dasd_ioctl_resume(block); case BIODASDFMT: return dasd_ioctl_format(bdev, argp); case BIODASDINFO: - return dasd_ioctl_information(device, cmd, argp); + return dasd_ioctl_information(block, cmd, argp); case BIODASDINFO2: - return dasd_ioctl_information(device, cmd, argp); + return dasd_ioctl_information(block, cmd, argp); case BIODASDPRRD: - return dasd_ioctl_read_profile(device, argp); + return dasd_ioctl_read_profile(block, argp); case BIODASDPRRST: - return dasd_ioctl_reset_profile(device); + return dasd_ioctl_reset_profile(block); case BLKROSET: return dasd_ioctl_set_ro(bdev, argp); case DASDAPIVER: return dasd_ioctl_api_version(argp); case BIODASDCMFENABLE: - return enable_cmf(device->cdev); + return enable_cmf(block->base->cdev); case BIODASDCMFDISABLE: - return disable_cmf(device->cdev); + return disable_cmf(block->base->cdev); case BIODASDREADALLCMB: - return dasd_ioctl_readall_cmb(device, cmd, arg); + return dasd_ioctl_readall_cmb(block, cmd, arg); default: /* if the discipline has an ioctl method try it. */ - if (device->discipline->ioctl) { - int rval = device->discipline->ioctl(device, cmd, argp); + if (block->base->discipline->ioctl) { + int rval = block->base->discipline->ioctl(block, cmd, argp); if (rval != -ENOIOCTLCMD) return rval; } diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index ac7e8ef..28a86f07 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -54,11 +54,16 @@ static int dasd_devices_show(struct seq_file *m, void *v) { struct dasd_device *device; + struct dasd_block *block; char *substr; device = dasd_device_from_devindex((unsigned long) v - 1); if (IS_ERR(device)) return 0; + if (device->block) + block = device->block; + else + return 0; /* Print device number. */ seq_printf(m, "%s", device->cdev->dev.bus_id); /* Print discipline string. */ @@ -67,14 +72,14 @@ dasd_devices_show(struct seq_file *m, void *v) else seq_printf(m, "(none)"); /* Print kdev. */ - if (device->gdp) + if (block->gdp) seq_printf(m, " at (%3d:%6d)", - device->gdp->major, device->gdp->first_minor); + block->gdp->major, block->gdp->first_minor); else seq_printf(m, " at (???:??????)"); /* Print device name. */ - if (device->gdp) - seq_printf(m, " is %-8s", device->gdp->disk_name); + if (block->gdp) + seq_printf(m, " is %-8s", block->gdp->disk_name); else seq_printf(m, " is ????????"); /* Print devices features. */ @@ -100,14 +105,14 @@ dasd_devices_show(struct seq_file *m, void *v) case DASD_STATE_READY: case DASD_STATE_ONLINE: seq_printf(m, "active "); - if (dasd_check_blocksize(device->bp_block)) + if (dasd_check_blocksize(block->bp_block)) seq_printf(m, "n/f "); else seq_printf(m, "at blocksize: %d, %ld blocks, %ld MB", - device->bp_block, device->blocks, - ((device->bp_block >> 9) * - device->blocks) >> 11); + block->bp_block, block->blocks, + ((block->bp_block >> 9) * + block->blocks) >> 11); break; default: seq_printf(m, "no stat"); @@ -137,7 +142,7 @@ static void dasd_devices_stop(struct seq_file *m, void *v) { } -static struct seq_operations dasd_devices_seq_ops = { +static const struct seq_operations dasd_devices_seq_ops = { .start = dasd_devices_start, .next = dasd_devices_next, .stop = dasd_devices_stop, diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 15a5789..7779bfc 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -82,7 +82,7 @@ struct dcssblk_dev_info { struct request_queue *dcssblk_queue; }; -static struct list_head dcssblk_devices = LIST_HEAD_INIT(dcssblk_devices); +static LIST_HEAD(dcssblk_devices); static struct rw_semaphore dcssblk_devices_sem; /* diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile index 130de19..7e73e39 100644 --- a/drivers/s390/char/Makefile +++ b/drivers/s390/char/Makefile @@ -3,7 +3,7 @@ # obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \ - sclp_info.o sclp_config.o sclp_chp.o + sclp_cmd.o sclp_config.o sclp_cpi_sys.o obj-$(CONFIG_TN3270) += raw3270.o obj-$(CONFIG_TN3270_CONSOLE) += con3270.o diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c index 20442fb..a86c053 100644 --- a/drivers/s390/char/monwriter.c +++ b/drivers/s390/char/monwriter.c @@ -295,7 +295,7 @@ module_init(mon_init); module_exit(mon_exit); module_param_named(max_bufs, mon_max_bufs, int, 0644); -MODULE_PARM_DESC(max_bufs, "Maximum number of sample monitor data buffers" +MODULE_PARM_DESC(max_bufs, "Maximum number of sample monitor data buffers " "that can be active at one time"); MODULE_AUTHOR("Melissa Howland <Melissa.Howland@us.ibm.com>"); diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index 8d1c64a..0d98f1f 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -66,7 +66,7 @@ struct raw3270 { static DEFINE_MUTEX(raw3270_mutex); /* List of 3270 devices. */ -static struct list_head raw3270_devices = LIST_HEAD_INIT(raw3270_devices); +static LIST_HEAD(raw3270_devices); /* * Flag to indicate if the driver has been registered. Some operations @@ -1210,7 +1210,7 @@ struct raw3270_notifier { void (*notifier)(int, int); }; -static struct list_head raw3270_notifier = LIST_HEAD_INIT(raw3270_notifier); +static LIST_HEAD(raw3270_notifier); int raw3270_register_notifier(void (*notifier)(int, int)) { diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index c7318a1..aa8186d 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -56,8 +56,6 @@ typedef unsigned int sclp_cmdw_t; #define SCLP_CMDW_READ_EVENT_DATA 0x00770005 #define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005 #define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005 -#define SCLP_CMDW_READ_SCP_INFO 0x00020001 -#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 #define GDS_ID_MDSMU 0x1310 #define GDS_ID_MDSROUTEINFO 0x1311 @@ -83,6 +81,8 @@ extern u64 sclp_facilities; #define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL) #define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL) +#define SCLP_HAS_CPU_INFO (sclp_facilities & 0x0800000000000000ULL) +#define SCLP_HAS_CPU_RECONFIG (sclp_facilities & 0x0400000000000000ULL) struct gds_subvector { u8 length; diff --git a/drivers/s390/char/sclp_chp.c b/drivers/s390/char/sclp_chp.c deleted file mode 100644 index c68f5e7..0000000 --- a/drivers/s390/char/sclp_chp.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * drivers/s390/char/sclp_chp.c - * - * Copyright IBM Corp. 2007 - * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> - */ - -#include <linux/types.h> -#include <linux/gfp.h> -#include <linux/errno.h> -#include <linux/completion.h> -#include <asm/sclp.h> -#include <asm/chpid.h> - -#include "sclp.h" - -#define TAG "sclp_chp: " - -#define SCLP_CMDW_CONFIGURE_CHANNEL_PATH 0x000f0001 -#define SCLP_CMDW_DECONFIGURE_CHANNEL_PATH 0x000e0001 -#define SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION 0x00030001 - -static inline sclp_cmdw_t get_configure_cmdw(struct chp_id chpid) -{ - return SCLP_CMDW_CONFIGURE_CHANNEL_PATH | chpid.id << 8; -} - -static inline sclp_cmdw_t get_deconfigure_cmdw(struct chp_id chpid) -{ - return SCLP_CMDW_DECONFIGURE_CHANNEL_PATH | chpid.id << 8; -} - -static void chp_callback(struct sclp_req *req, void *data) -{ - struct completion *completion = data; - - complete(completion); -} - -struct chp_cfg_sccb { - struct sccb_header header; - u8 ccm; - u8 reserved[6]; - u8 cssid; -} __attribute__((packed)); - -struct chp_cfg_data { - struct chp_cfg_sccb sccb; - struct sclp_req req; - struct completion completion; -} __attribute__((packed)); - -static int do_configure(sclp_cmdw_t cmd) -{ - struct chp_cfg_data *data; - int rc; - - if (!SCLP_HAS_CHP_RECONFIG) - return -EOPNOTSUPP; - /* Prepare sccb. */ - data = (struct chp_cfg_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA); - if (!data) - return -ENOMEM; - data->sccb.header.length = sizeof(struct chp_cfg_sccb); - data->req.command = cmd; - data->req.sccb = &(data->sccb); - data->req.status = SCLP_REQ_FILLED; - data->req.callback = chp_callback; - data->req.callback_data = &(data->completion); - init_completion(&data->completion); - - /* Perform sclp request. */ - rc = sclp_add_request(&(data->req)); - if (rc) - goto out; - wait_for_completion(&data->completion); - - /* Check response .*/ - if (data->req.status != SCLP_REQ_DONE) { - printk(KERN_WARNING TAG "configure channel-path request failed " - "(status=0x%02x)\n", data->req.status); - rc = -EIO; - goto out; - } - switch (data->sccb.header.response_code) { - case 0x0020: - case 0x0120: - case 0x0440: - case 0x0450: - break; - default: - printk(KERN_WARNING TAG "configure channel-path failed " - "(cmd=0x%08x, response=0x%04x)\n", cmd, - data->sccb.header.response_code); - rc = -EIO; - break; - } -out: - free_page((unsigned long) data); - - return rc; -} - -/** - * sclp_chp_configure - perform configure channel-path sclp command - * @chpid: channel-path ID - * - * Perform configure channel-path command sclp command for specified chpid. - * Return 0 after command successfully finished, non-zero otherwise. - */ -int sclp_chp_configure(struct chp_id chpid) -{ - return do_configure(get_configure_cmdw(chpid)); -} - -/** - * sclp_chp_deconfigure - perform deconfigure channel-path sclp command - * @chpid: channel-path ID - * - * Perform deconfigure channel-path command sclp command for specified chpid - * and wait for completion. On success return 0. Return non-zero otherwise. - */ -int sclp_chp_deconfigure(struct chp_id chpid) -{ - return do_configure(get_deconfigure_cmdw(chpid)); -} - -struct chp_info_sccb { - struct sccb_header header; - u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; - u8 standby[SCLP_CHP_INFO_MASK_SIZE]; - u8 configured[SCLP_CHP_INFO_MASK_SIZE]; - u8 ccm; - u8 reserved[6]; - u8 cssid; -} __attribute__((packed)); - -struct chp_info_data { - struct chp_info_sccb sccb; - struct sclp_req req; - struct completion completion; -} __attribute__((packed)); - -/** - * sclp_chp_read_info - perform read channel-path information sclp command - * @info: resulting channel-path information data - * - * Perform read channel-path information sclp command and wait for completion. - * On success, store channel-path information in @info and return 0. Return - * non-zero otherwise. - */ -int sclp_chp_read_info(struct sclp_chp_info *info) -{ - struct chp_info_data *data; - int rc; - - if (!SCLP_HAS_CHP_INFO) - return -EOPNOTSUPP; - /* Prepare sccb. */ - data = (struct chp_info_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA); - if (!data) - return -ENOMEM; - data->sccb.header.length = sizeof(struct chp_info_sccb); - data->req.command = SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION; - data->req.sccb = &(data->sccb); - data->req.status = SCLP_REQ_FILLED; - data->req.callback = chp_callback; - data->req.callback_data = &(data->completion); - init_completion(&data->completion); - - /* Perform sclp request. */ - rc = sclp_add_request(&(data->req)); - if (rc) - goto out; - wait_for_completion(&data->completion); - - /* Check response .*/ - if (data->req.status != SCLP_REQ_DONE) { - printk(KERN_WARNING TAG "read channel-path info request failed " - "(status=0x%02x)\n", data->req.status); - rc = -EIO; - goto out; - } - if (data->sccb.header.response_code != 0x0010) { - printk(KERN_WARNING TAG "read channel-path info failed " - "(response=0x%04x)\n", data->sccb.header.response_code); - rc = -EIO; - goto out; - } - memcpy(info->recognized, data->sccb.recognized, - SCLP_CHP_INFO_MASK_SIZE); - memcpy(info->standby, data->sccb.standby, - SCLP_CHP_INFO_MASK_SIZE); - memcpy(info->configured, data->sccb.configured, - SCLP_CHP_INFO_MASK_SIZE); -out: - free_page((unsigned long) data); - - return rc; -} diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c new file mode 100644 index 0000000..b5c2339 --- /dev/null +++ b/drivers/s390/char/sclp_cmd.c @@ -0,0 +1,398 @@ +/* + * drivers/s390/char/sclp_cmd.c + * + * Copyright IBM Corp. 2007 + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, + * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> + */ + +#include <linux/completion.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <asm/chpid.h> +#include <asm/sclp.h> +#include "sclp.h" + +#define TAG "sclp_cmd: " + +#define SCLP_CMDW_READ_SCP_INFO 0x00020001 +#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 + +struct read_info_sccb { + struct sccb_header header; /* 0-7 */ + u16 rnmax; /* 8-9 */ + u8 rnsize; /* 10 */ + u8 _reserved0[24 - 11]; /* 11-15 */ + u8 loadparm[8]; /* 24-31 */ + u8 _reserved1[48 - 32]; /* 32-47 */ + u64 facilities; /* 48-55 */ + u8 _reserved2[84 - 56]; /* 56-83 */ + u8 fac84; /* 84 */ + u8 _reserved3[91 - 85]; /* 85-90 */ + u8 flags; /* 91 */ + u8 _reserved4[100 - 92]; /* 92-99 */ + u32 rnsize2; /* 100-103 */ + u64 rnmax2; /* 104-111 */ + u8 _reserved5[4096 - 112]; /* 112-4095 */ +} __attribute__((packed, aligned(PAGE_SIZE))); + +static struct read_info_sccb __initdata early_read_info_sccb; +static int __initdata early_read_info_sccb_valid; + +u64 sclp_facilities; +static u8 sclp_fac84; + +static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) +{ + int rc; + + __ctl_set_bit(0, 9); + rc = sclp_service_call(cmd, sccb); + if (rc) + goto out; + __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT | + PSW_MASK_WAIT | PSW_DEFAULT_KEY); + local_irq_disable(); +out: + /* Contents of the sccb might have changed. */ + barrier(); + __ctl_clear_bit(0, 9); + return rc; +} + +void __init sclp_read_info_early(void) +{ + int rc; + int i; + struct read_info_sccb *sccb; + sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, + SCLP_CMDW_READ_SCP_INFO}; + + sccb = &early_read_info_sccb; + for (i = 0; i < ARRAY_SIZE(commands); i++) { + do { + memset(sccb, 0, sizeof(*sccb)); + sccb->header.length = sizeof(*sccb); + sccb->header.control_mask[2] = 0x80; + rc = sclp_cmd_sync_early(commands[i], sccb); + } while (rc == -EBUSY); + + if (rc) + break; + if (sccb->header.response_code == 0x10) { + early_read_info_sccb_valid = 1; + break; + } + if (sccb->header.response_code != 0x1f0) + break; + } +} + +void __init sclp_facilities_detect(void) +{ + if (!early_read_info_sccb_valid) + return; + sclp_facilities = early_read_info_sccb.facilities; + sclp_fac84 = early_read_info_sccb.fac84; +} + +unsigned long long __init sclp_memory_detect(void) +{ + unsigned long long memsize; + struct read_info_sccb *sccb; + + if (!early_read_info_sccb_valid) + return 0; + sccb = &early_read_info_sccb; + if (sccb->rnsize) + memsize = sccb->rnsize << 20; + else + memsize = sccb->rnsize2 << 20; + if (sccb->rnmax) + memsize *= sccb->rnmax; + else + memsize *= sccb->rnmax2; + return memsize; +} + +/* + * This function will be called after sclp_memory_detect(), which gets called + * early from early.c code. Therefore the sccb should have valid contents. + */ +void __init sclp_get_ipl_info(struct sclp_ipl_info *info) +{ + struct read_info_sccb *sccb; + + if (!early_read_info_sccb_valid) + return; + sccb = &early_read_info_sccb; + info->is_valid = 1; + if (sccb->flags & 0x2) + info->has_dump = 1; + memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); +} + +static void sclp_sync_callback(struct sclp_req *req, void *data) +{ + struct completion *completion = data; + + complete(completion); +} + +static int do_sync_request(sclp_cmdw_t cmd, void *sccb) +{ + struct completion completion; + struct sclp_req *request; + int rc; + + request = kzalloc(sizeof(*request), GFP_KERNEL); + if (!request) + return -ENOMEM; + request->command = cmd; + request->sccb = sccb; + request->status = SCLP_REQ_FILLED; + request->callback = sclp_sync_callback; + request->callback_data = &completion; + init_completion(&completion); + + /* Perform sclp request. */ + rc = sclp_add_request(request); + if (rc) + goto out; + wait_for_completion(&completion); + + /* Check response. */ + if (request->status != SCLP_REQ_DONE) { + printk(KERN_WARNING TAG "sync request failed " + "(cmd=0x%08x, status=0x%02x)\n", cmd, request->status); + rc = -EIO; + } +out: + kfree(request); + return rc; +} + +/* + * CPU configuration related functions. + */ + +#define SCLP_CMDW_READ_CPU_INFO 0x00010001 +#define SCLP_CMDW_CONFIGURE_CPU 0x00110001 +#define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 + +struct read_cpu_info_sccb { + struct sccb_header header; + u16 nr_configured; + u16 offset_configured; + u16 nr_standby; + u16 offset_standby; + u8 reserved[4096 - 16]; +} __attribute__((packed, aligned(PAGE_SIZE))); + +static void sclp_fill_cpu_info(struct sclp_cpu_info *info, + struct read_cpu_info_sccb *sccb) +{ + char *page = (char *) sccb; + + memset(info, 0, sizeof(*info)); + info->configured = sccb->nr_configured; + info->standby = sccb->nr_standby; + info->combined = sccb->nr_configured + sccb->nr_standby; + info->has_cpu_type = sclp_fac84 & 0x1; + memcpy(&info->cpu, page + sccb->offset_configured, + info->combined * sizeof(struct sclp_cpu_entry)); +} + +int sclp_get_cpu_info(struct sclp_cpu_info *info) +{ + int rc; + struct read_cpu_info_sccb *sccb; + + if (!SCLP_HAS_CPU_INFO) + return -EOPNOTSUPP; + sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) + return -ENOMEM; + sccb->header.length = sizeof(*sccb); + rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb); + if (rc) + goto out; + if (sccb->header.response_code != 0x0010) { + printk(KERN_WARNING TAG "readcpuinfo failed " + "(response=0x%04x)\n", sccb->header.response_code); + rc = -EIO; + goto out; + } + sclp_fill_cpu_info(info, sccb); +out: + free_page((unsigned long) sccb); + return rc; +} + +struct cpu_configure_sccb { + struct sccb_header header; +} __attribute__((packed, aligned(8))); + +static int do_cpu_configure(sclp_cmdw_t cmd) +{ + struct cpu_configure_sccb *sccb; + int rc; + + if (!SCLP_HAS_CPU_RECONFIG) + return -EOPNOTSUPP; + /* + * This is not going to cross a page boundary since we force + * kmalloc to have a minimum alignment of 8 bytes on s390. + */ + sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA); + if (!sccb) + return -ENOMEM; + sccb->header.length = sizeof(*sccb); + rc = do_sync_request(cmd, sccb); + if (rc) + goto out; + switch (sccb->header.response_code) { + case 0x0020: + case 0x0120: + break; + default: + printk(KERN_WARNING TAG "configure cpu failed (cmd=0x%08x, " + "response=0x%04x)\n", cmd, sccb->header.response_code); + rc = -EIO; + break; + } +out: + kfree(sccb); + return rc; +} + +int sclp_cpu_configure(u8 cpu) +{ + return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8); +} + +int sclp_cpu_deconfigure(u8 cpu) +{ + return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8); +} + +/* + * Channel path configuration related functions. + */ + +#define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001 +#define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001 +#define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001 + +struct chp_cfg_sccb { + struct sccb_header header; + u8 ccm; + u8 reserved[6]; + u8 cssid; +} __attribute__((packed)); + +static int do_chp_configure(sclp_cmdw_t cmd) +{ + struct chp_cfg_sccb *sccb; + int rc; + + if (!SCLP_HAS_CHP_RECONFIG) + return -EOPNOTSUPP; + /* Prepare sccb. */ + sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) + return -ENOMEM; + sccb->header.length = sizeof(*sccb); + rc = do_sync_request(cmd, sccb); + if (rc) + goto out; + switch (sccb->header.response_code) { + case 0x0020: + case 0x0120: + case 0x0440: + case 0x0450: + break; + default: + printk(KERN_WARNING TAG "configure channel-path failed " + "(cmd=0x%08x, response=0x%04x)\n", cmd, + sccb->header.response_code); + rc = -EIO; + break; + } +out: + free_page((unsigned long) sccb); + return rc; +} + +/** + * sclp_chp_configure - perform configure channel-path sclp command + * @chpid: channel-path ID + * + * Perform configure channel-path command sclp command for specified chpid. + * Return 0 after command successfully finished, non-zero otherwise. + */ +int sclp_chp_configure(struct chp_id chpid) +{ + return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8); +} + +/** + * sclp_chp_deconfigure - perform deconfigure channel-path sclp command + * @chpid: channel-path ID + * + * Perform deconfigure channel-path command sclp command for specified chpid + * and wait for completion. On success return 0. Return non-zero otherwise. + */ +int sclp_chp_deconfigure(struct chp_id chpid) +{ + return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8); +} + +struct chp_info_sccb { + struct sccb_header header; + u8 recognized[SCLP_CHP_INFO_MASK_SIZE]; + u8 standby[SCLP_CHP_INFO_MASK_SIZE]; + u8 configured[SCLP_CHP_INFO_MASK_SIZE]; + u8 ccm; + u8 reserved[6]; + u8 cssid; +} __attribute__((packed)); + +/** + * sclp_chp_read_info - perform read channel-path information sclp command + * @info: resulting channel-path information data + * + * Perform read channel-path information sclp command and wait for completion. + * On success, store channel-path information in @info and return 0. Return + * non-zero otherwise. + */ +int sclp_chp_read_info(struct sclp_chp_info *info) +{ + struct chp_info_sccb *sccb; + int rc; + + if (!SCLP_HAS_CHP_INFO) + return -EOPNOTSUPP; + /* Prepare sccb. */ + sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) + return -ENOMEM; + sccb->header.length = sizeof(*sccb); + rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb); + if (rc) + goto out; + if (sccb->header.response_code != 0x0010) { + printk(KERN_WARNING TAG "read channel-path info failed " + "(response=0x%04x)\n", sccb->header.response_code); + rc = -EIO; + goto out; + } + memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE); + memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE); + memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE); +out: + free_page((unsigned long) sccb); + return rc; +} diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index 5322e5e..9dc77f1 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c @@ -29,12 +29,12 @@ static void sclp_cpu_capability_notify(struct work_struct *work) struct sys_device *sysdev; printk(KERN_WARNING TAG "cpu capability changed.\n"); - lock_cpu_hotplug(); + get_online_cpus(); for_each_online_cpu(cpu) { sysdev = get_cpu_sysdev(cpu); kobject_uevent(&sysdev->kobj, KOBJ_CHANGE); } - unlock_cpu_hotplug(); + put_online_cpus(); } static void sclp_conf_receiver_fn(struct evbuf_header *evbuf) diff --git a/drivers/s390/char/sclp_cpi.c b/drivers/s390/char/sclp_cpi.c index 82a13d9..5716487 100644 --- a/drivers/s390/char/sclp_cpi.c +++ b/drivers/s390/char/sclp_cpi.c @@ -1,255 +1,41 @@ /* - * Author: Martin Peschke <mpeschke@de.ibm.com> - * Copyright (C) 2001 IBM Entwicklung GmbH, IBM Corporation + * drivers/s390/char/sclp_cpi.c + * SCLP control programm identification * - * SCLP Control-Program Identification. + * Copyright IBM Corp. 2001, 2007 + * Author(s): Martin Peschke <mpeschke@de.ibm.com> + * Michael Ernst <mernst@de.ibm.com> */ -#include <linux/version.h> #include <linux/kmod.h> #include <linux/module.h> #include <linux/moduleparam.h> -#include <linux/init.h> -#include <linux/timer.h> -#include <linux/string.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <asm/ebcdic.h> -#include <asm/semaphore.h> - -#include "sclp.h" -#include "sclp_rw.h" - -#define CPI_LENGTH_SYSTEM_TYPE 8 -#define CPI_LENGTH_SYSTEM_NAME 8 -#define CPI_LENGTH_SYSPLEX_NAME 8 - -struct cpi_evbuf { - struct evbuf_header header; - u8 id_format; - u8 reserved0; - u8 system_type[CPI_LENGTH_SYSTEM_TYPE]; - u64 reserved1; - u8 system_name[CPI_LENGTH_SYSTEM_NAME]; - u64 reserved2; - u64 system_level; - u64 reserved3; - u8 sysplex_name[CPI_LENGTH_SYSPLEX_NAME]; - u8 reserved4[16]; -} __attribute__((packed)); - -struct cpi_sccb { - struct sccb_header header; - struct cpi_evbuf cpi_evbuf; -} __attribute__((packed)); - -/* Event type structure for write message and write priority message */ -static struct sclp_register sclp_cpi_event = -{ - .send_mask = EVTYP_CTLPROGIDENT_MASK -}; +#include <linux/version.h> +#include "sclp_cpi_sys.h" MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Identify this operating system instance " + "to the System z hardware"); +MODULE_AUTHOR("Martin Peschke <mpeschke@de.ibm.com>, " + "Michael Ernst <mernst@de.ibm.com>"); -MODULE_AUTHOR( - "Martin Peschke, IBM Deutschland Entwicklung GmbH " - "<mpeschke@de.ibm.com>"); - -MODULE_DESCRIPTION( - "identify this operating system instance to the S/390 " - "or zSeries hardware"); +static char *system_name = ""; +static char *sysplex_name = ""; -static char *system_name = NULL; module_param(system_name, charp, 0); MODULE_PARM_DESC(system_name, "e.g. hostname - max. 8 characters"); - -static char *sysplex_name = NULL; -#ifdef ALLOW_SYSPLEX_NAME module_param(sysplex_name, charp, 0); MODULE_PARM_DESC(sysplex_name, "if applicable - max. 8 characters"); -#endif - -/* use default value for this field (as well as for system level) */ -static char *system_type = "LINUX"; -static int -cpi_check_parms(void) +static int __init cpi_module_init(void) { - /* reject if no system type specified */ - if (!system_type) { - printk("cpi: bug: no system type specified\n"); - return -EINVAL; - } - - /* reject if system type larger than 8 characters */ - if (strlen(system_type) > CPI_LENGTH_SYSTEM_NAME) { - printk("cpi: bug: system type has length of %li characters - " - "only %i characters supported\n", - strlen(system_type), CPI_LENGTH_SYSTEM_TYPE); - return -EINVAL; - } - - /* reject if no system name specified */ - if (!system_name) { - printk("cpi: no system name specified\n"); - return -EINVAL; - } - - /* reject if system name larger than 8 characters */ - if (strlen(system_name) > CPI_LENGTH_SYSTEM_NAME) { - printk("cpi: system name has length of %li characters - " - "only %i characters supported\n", - strlen(system_name), CPI_LENGTH_SYSTEM_NAME); - return -EINVAL; - } - - /* reject if specified sysplex name larger than 8 characters */ - if (sysplex_name && strlen(sysplex_name) > CPI_LENGTH_SYSPLEX_NAME) { - printk("cpi: sysplex name has length of %li characters" - " - only %i characters supported\n", - strlen(sysplex_name), CPI_LENGTH_SYSPLEX_NAME); - return -EINVAL; - } - return 0; + return sclp_cpi_set_data(system_name, sysplex_name, "LINUX", + LINUX_VERSION_CODE); } -static void -cpi_callback(struct sclp_req *req, void *data) -{ - struct semaphore *sem; - - sem = (struct semaphore *) data; - up(sem); -} - -static struct sclp_req * -cpi_prepare_req(void) -{ - struct sclp_req *req; - struct cpi_sccb *sccb; - struct cpi_evbuf *evb; - - req = kmalloc(sizeof(struct sclp_req), GFP_KERNEL); - if (req == NULL) - return ERR_PTR(-ENOMEM); - sccb = (struct cpi_sccb *) __get_free_page(GFP_KERNEL | GFP_DMA); - if (sccb == NULL) { - kfree(req); - return ERR_PTR(-ENOMEM); - } - memset(sccb, 0, sizeof(struct cpi_sccb)); - - /* setup SCCB for Control-Program Identification */ - sccb->header.length = sizeof(struct cpi_sccb); - sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf); - sccb->cpi_evbuf.header.type = 0x0B; - evb = &sccb->cpi_evbuf; - - /* set system type */ - memset(evb->system_type, ' ', CPI_LENGTH_SYSTEM_TYPE); - memcpy(evb->system_type, system_type, strlen(system_type)); - sclp_ascebc_str(evb->system_type, CPI_LENGTH_SYSTEM_TYPE); - EBC_TOUPPER(evb->system_type, CPI_LENGTH_SYSTEM_TYPE); - - /* set system name */ - memset(evb->system_name, ' ', CPI_LENGTH_SYSTEM_NAME); - memcpy(evb->system_name, system_name, strlen(system_name)); - sclp_ascebc_str(evb->system_name, CPI_LENGTH_SYSTEM_NAME); - EBC_TOUPPER(evb->system_name, CPI_LENGTH_SYSTEM_NAME); - - /* set system level */ - evb->system_level = LINUX_VERSION_CODE; - - /* set sysplex name */ - if (sysplex_name) { - memset(evb->sysplex_name, ' ', CPI_LENGTH_SYSPLEX_NAME); - memcpy(evb->sysplex_name, sysplex_name, strlen(sysplex_name)); - sclp_ascebc_str(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME); - EBC_TOUPPER(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME); - } - - /* prepare request data structure presented to SCLP driver */ - req->command = SCLP_CMDW_WRITE_EVENT_DATA; - req->sccb = sccb; - req->status = SCLP_REQ_FILLED; - req->callback = cpi_callback; - return req; -} - -static void -cpi_free_req(struct sclp_req *req) -{ - free_page((unsigned long) req->sccb); - kfree(req); -} - -static int __init -cpi_module_init(void) -{ - struct semaphore sem; - struct sclp_req *req; - int rc; - - rc = cpi_check_parms(); - if (rc) - return rc; - - rc = sclp_register(&sclp_cpi_event); - if (rc) { - /* could not register sclp event. Die. */ - printk(KERN_WARNING "cpi: could not register to hardware " - "console.\n"); - return -EINVAL; - } - if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) { - printk(KERN_WARNING "cpi: no control program identification " - "support\n"); - sclp_unregister(&sclp_cpi_event); - return -EOPNOTSUPP; - } - - req = cpi_prepare_req(); - if (IS_ERR(req)) { - printk(KERN_WARNING "cpi: couldn't allocate request\n"); - sclp_unregister(&sclp_cpi_event); - return PTR_ERR(req); - } - - /* Prepare semaphore */ - sema_init(&sem, 0); - req->callback_data = &sem; - /* Add request to sclp queue */ - rc = sclp_add_request(req); - if (rc) { - printk(KERN_WARNING "cpi: could not start request\n"); - cpi_free_req(req); - sclp_unregister(&sclp_cpi_event); - return rc; - } - /* make "insmod" sleep until callback arrives */ - down(&sem); - - rc = ((struct cpi_sccb *) req->sccb)->header.response_code; - if (rc != 0x0020) { - printk(KERN_WARNING "cpi: failed with response code 0x%x\n", - rc); - rc = -ECOMM; - } else - rc = 0; - - cpi_free_req(req); - sclp_unregister(&sclp_cpi_event); - - return rc; -} - - static void __exit cpi_module_exit(void) { } - -/* declare driver module init/cleanup functions */ module_init(cpi_module_init); module_exit(cpi_module_exit); - diff --git a/drivers/s390/char/sclp_cpi_sys.c b/drivers/s390/char/sclp_cpi_sys.c new file mode 100644 index 0000000..4161703 --- /dev/null +++ b/drivers/s390/char/sclp_cpi_sys.c @@ -0,0 +1,400 @@ +/* + * drivers/s390/char/sclp_cpi_sys.c + * SCLP control program identification sysfs interface + * + * Copyright IBM Corp. 2001, 2007 + * Author(s): Martin Peschke <mpeschke@de.ibm.com> + * Michael Ernst <mernst@de.ibm.com> + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/stat.h> +#include <linux/device.h> +#include <linux/string.h> +#include <linux/ctype.h> +#include <linux/kmod.h> +#include <linux/timer.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/completion.h> +#include <asm/ebcdic.h> +#include <asm/sclp.h> +#include "sclp.h" +#include "sclp_rw.h" +#include "sclp_cpi_sys.h" + +#define CPI_LENGTH_NAME 8 +#define CPI_LENGTH_LEVEL 16 + +struct cpi_evbuf { + struct evbuf_header header; + u8 id_format; + u8 reserved0; + u8 system_type[CPI_LENGTH_NAME]; + u64 reserved1; + u8 system_name[CPI_LENGTH_NAME]; + u64 reserved2; + u64 system_level; + u64 reserved3; + u8 sysplex_name[CPI_LENGTH_NAME]; + u8 reserved4[16]; +} __attribute__((packed)); + +struct cpi_sccb { + struct sccb_header header; + struct cpi_evbuf cpi_evbuf; +} __attribute__((packed)); + +static struct sclp_register sclp_cpi_event = { + .send_mask = EVTYP_CTLPROGIDENT_MASK, +}; + +static char system_name[CPI_LENGTH_NAME + 1]; +static char sysplex_name[CPI_LENGTH_NAME + 1]; +static char system_type[CPI_LENGTH_NAME + 1]; +static u64 system_level; + +static void set_data(char *field, char *data) +{ + memset(field, ' ', CPI_LENGTH_NAME); + memcpy(field, data, strlen(data)); + sclp_ascebc_str(field, CPI_LENGTH_NAME); +} + +static void cpi_callback(struct sclp_req *req, void *data) +{ + struct completion *completion = data; + + complete(completion); +} + +static struct sclp_req *cpi_prepare_req(void) +{ + struct sclp_req *req; + struct cpi_sccb *sccb; + struct cpi_evbuf *evb; + + req = kzalloc(sizeof(struct sclp_req), GFP_KERNEL); + if (!req) + return ERR_PTR(-ENOMEM); + sccb = (struct cpi_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) { + kfree(req); + return ERR_PTR(-ENOMEM); + } + + /* setup SCCB for Control-Program Identification */ + sccb->header.length = sizeof(struct cpi_sccb); + sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf); + sccb->cpi_evbuf.header.type = 0x0b; + evb = &sccb->cpi_evbuf; + + /* set system type */ + set_data(evb->system_type, system_type); + + /* set system name */ + set_data(evb->system_name, system_name); + + /* set sytem level */ + evb->system_level = system_level; + + /* set sysplex name */ + set_data(evb->sysplex_name, sysplex_name); + + /* prepare request data structure presented to SCLP driver */ + req->command = SCLP_CMDW_WRITE_EVENT_DATA; + req->sccb = sccb; + req->status = SCLP_REQ_FILLED; + req->callback = cpi_callback; + return req; +} + +static void cpi_free_req(struct sclp_req *req) +{ + free_page((unsigned long) req->sccb); + kfree(req); +} + +static int cpi_req(void) +{ + struct completion completion; + struct sclp_req *req; + int rc; + int response; + + rc = sclp_register(&sclp_cpi_event); + if (rc) { + printk(KERN_WARNING "cpi: could not register " + "to hardware console.\n"); + goto out; + } + if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) { + printk(KERN_WARNING "cpi: no control program " + "identification support\n"); + rc = -EOPNOTSUPP; + goto out_unregister; + } + + req = cpi_prepare_req(); + if (IS_ERR(req)) { + printk(KERN_WARNING "cpi: could not allocate request\n"); + rc = PTR_ERR(req); + goto out_unregister; + } + + init_completion(&completion); + req->callback_data = &completion; + + /* Add request to sclp queue */ + rc = sclp_add_request(req); + if (rc) { + printk(KERN_WARNING "cpi: could not start request\n"); + goto out_free_req; + } + + wait_for_completion(&completion); + + if (req->status != SCLP_REQ_DONE) { + printk(KERN_WARNING "cpi: request failed (status=0x%02x)\n", + req->status); + rc = -EIO; + goto out_free_req; + } + + response = ((struct cpi_sccb *) req->sccb)->header.response_code; + if (response != 0x0020) { + printk(KERN_WARNING "cpi: failed with " + "response code 0x%x\n", response); + rc = -EIO; + } + +out_free_req: + cpi_free_req(req); + +out_unregister: + sclp_unregister(&sclp_cpi_event); + +out: + return rc; +} + +static int check_string(const char *attr, const char *str) +{ + size_t len; + size_t i; + + len = strlen(str); + + if ((len > 0) && (str[len - 1] == '\n')) + len--; + + if (len > CPI_LENGTH_NAME) + return -EINVAL; + + for (i = 0; i < len ; i++) { + if (isalpha(str[i]) || isdigit(str[i]) || + strchr("$@# ", str[i])) + continue; + return -EINVAL; + } + + return 0; +} + +static void set_string(char *attr, const char *value) +{ + size_t len; + size_t i; + + len = strlen(value); + + if ((len > 0) && (value[len - 1] == '\n')) + len--; + + for (i = 0; i < CPI_LENGTH_NAME; i++) { + if (i < len) + attr[i] = toupper(value[i]); + else + attr[i] = ' '; + } +} + +static ssize_t system_name_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return snprintf(page, PAGE_SIZE, "%s\n", system_name); +} + +static ssize_t system_name_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, + size_t len) +{ + int rc; + + rc = check_string("system_name", buf); + if (rc) + return rc; + + set_string(system_name, buf); + + return len; +} + +static struct kobj_attribute system_name_attr = + __ATTR(system_name, 0644, system_name_show, system_name_store); + +static ssize_t sysplex_name_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return snprintf(page, PAGE_SIZE, "%s\n", sysplex_name); +} + +static ssize_t sysplex_name_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, + size_t len) +{ + int rc; + + rc = check_string("sysplex_name", buf); + if (rc) + return rc; + + set_string(sysplex_name, buf); + + return len; +} + +static struct kobj_attribute sysplex_name_attr = + __ATTR(sysplex_name, 0644, sysplex_name_show, sysplex_name_store); + +static ssize_t system_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return snprintf(page, PAGE_SIZE, "%s\n", system_type); +} + +static ssize_t system_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, + size_t len) +{ + int rc; + + rc = check_string("system_type", buf); + if (rc) + return rc; + + set_string(system_type, buf); + + return len; +} + +static struct kobj_attribute system_type_attr = + __ATTR(system_type, 0644, system_type_show, system_type_store); + +static ssize_t system_level_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + unsigned long long level = system_level; + + return snprintf(page, PAGE_SIZE, "%#018llx\n", level); +} + +static ssize_t system_level_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, + size_t len) +{ + unsigned long long level; + char *endp; + + level = simple_strtoull(buf, &endp, 16); + + if (endp == buf) + return -EINVAL; + if (*endp == '\n') + endp++; + if (*endp) + return -EINVAL; + + system_level = level; + + return len; +} + +static struct kobj_attribute system_level_attr = + __ATTR(system_level, 0644, system_level_show, system_level_store); + +static ssize_t set_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + int rc; + + rc = cpi_req(); + if (rc) + return rc; + + return len; +} + +static struct kobj_attribute set_attr = __ATTR(set, 0200, NULL, set_store); + +static struct attribute *cpi_attrs[] = { + &system_name_attr.attr, + &sysplex_name_attr.attr, + &system_type_attr.attr, + &system_level_attr.attr, + &set_attr.attr, + NULL, +}; + +static struct attribute_group cpi_attr_group = { + .attrs = cpi_attrs, +}; + +static struct kset *cpi_kset; + +int sclp_cpi_set_data(const char *system, const char *sysplex, const char *type, + const u64 level) +{ + int rc; + + rc = check_string("system_name", system); + if (rc) + return rc; + rc = check_string("sysplex_name", sysplex); + if (rc) + return rc; + rc = check_string("system_type", type); + if (rc) + return rc; + + set_string(system_name, system); + set_string(sysplex_name, sysplex); + set_string(system_type, type); + system_level = level; + + return cpi_req(); +} +EXPORT_SYMBOL(sclp_cpi_set_data); + +static int __init cpi_init(void) +{ + int rc; + + cpi_kset = kset_create_and_add("cpi", NULL, firmware_kobj); + if (!cpi_kset) + return -ENOMEM; + + rc = sysfs_create_group(&cpi_kset->kobj, &cpi_attr_group); + if (rc) + kset_unregister(cpi_kset); + + return rc; +} + +__initcall(cpi_init); diff --git a/drivers/s390/char/sclp_cpi_sys.h b/drivers/s390/char/sclp_cpi_sys.h new file mode 100644 index 0000000..deef3e6 --- /dev/null +++ b/drivers/s390/char/sclp_cpi_sys.h @@ -0,0 +1,15 @@ +/* + * drivers/s390/char/sclp_cpi_sys.h + * SCLP control program identification sysfs interface + * + * Copyright IBM Corp. 2007 + * Author(s): Michael Ernst <mernst@de.ibm.com> + */ + +#ifndef __SCLP_CPI_SYS_H__ +#define __SCLP_CPI_SYS_H__ + +int sclp_cpi_set_data(const char *system, const char *sysplex, + const char *type, u64 level); + +#endif /* __SCLP_CPI_SYS_H__ */ diff --git a/drivers/s390/char/sclp_info.c b/drivers/s390/char/sclp_info.c deleted file mode 100644 index a1136e0..0000000 --- a/drivers/s390/char/sclp_info.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * drivers/s390/char/sclp_info.c - * - * Copyright IBM Corp. 2007 - * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> - */ - -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <asm/sclp.h> -#include "sclp.h" - -struct sclp_readinfo_sccb { - struct sccb_header header; /* 0-7 */ - u16 rnmax; /* 8-9 */ - u8 rnsize; /* 10 */ - u8 _reserved0[24 - 11]; /* 11-23 */ - u8 loadparm[8]; /* 24-31 */ - u8 _reserved1[48 - 32]; /* 32-47 */ - u64 facilities; /* 48-55 */ - u8 _reserved2[91 - 56]; /* 56-90 */ - u8 flags; /* 91 */ - u8 _reserved3[100 - 92]; /* 92-99 */ - u32 rnsize2; /* 100-103 */ - u64 rnmax2; /* 104-111 */ - u8 _reserved4[4096 - 112]; /* 112-4095 */ -} __attribute__((packed, aligned(4096))); - -static struct sclp_readinfo_sccb __initdata early_readinfo_sccb; -static int __initdata early_readinfo_sccb_valid; - -u64 sclp_facilities; - -void __init sclp_readinfo_early(void) -{ - int ret; - int i; - struct sclp_readinfo_sccb *sccb; - sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, - SCLP_CMDW_READ_SCP_INFO}; - - /* Enable service signal subclass mask. */ - __ctl_set_bit(0, 9); - sccb = &early_readinfo_sccb; - for (i = 0; i < ARRAY_SIZE(commands); i++) { - do { - memset(sccb, 0, sizeof(*sccb)); - sccb->header.length = sizeof(*sccb); - sccb->header.control_mask[2] = 0x80; - ret = sclp_service_call(commands[i], sccb); - } while (ret == -EBUSY); - - if (ret) - break; - __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT | - PSW_MASK_WAIT | PSW_DEFAULT_KEY); - local_irq_disable(); - /* - * Contents of the sccb might have changed - * therefore a barrier is needed. - */ - barrier(); - if (sccb->header.response_code == 0x10) { - early_readinfo_sccb_valid = 1; - break; - } - if (sccb->header.response_code != 0x1f0) - break; - } - /* Disable service signal subclass mask again. */ - __ctl_clear_bit(0, 9); -} - -void __init sclp_facilities_detect(void) -{ - if (!early_readinfo_sccb_valid) - return; - sclp_facilities = early_readinfo_sccb.facilities; -} - -unsigned long long __init sclp_memory_detect(void) -{ - unsigned long long memsize; - struct sclp_readinfo_sccb *sccb; - - if (!early_readinfo_sccb_valid) - return 0; - sccb = &early_readinfo_sccb; - if (sccb->rnsize) - memsize = sccb->rnsize << 20; - else - memsize = sccb->rnsize2 << 20; - if (sccb->rnmax) - memsize *= sccb->rnmax; - else - memsize *= sccb->rnmax2; - return memsize; -} - -/* - * This function will be called after sclp_memory_detect(), which gets called - * early from early.c code. Therefore the sccb should have valid contents. - */ -void __init sclp_get_ipl_info(struct sclp_ipl_info *info) -{ - struct sclp_readinfo_sccb *sccb; - - if (!early_readinfo_sccb_valid) - return; - sccb = &early_readinfo_sccb; - info->is_valid = 1; - if (sccb->flags & 0x2) - info->has_dump = 1; - memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); -} diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c index d6b06ab..ad7195d 100644 --- a/drivers/s390/char/sclp_rw.c +++ b/drivers/s390/char/sclp_rw.c @@ -76,7 +76,7 @@ sclp_make_buffer(void *page, unsigned short columns, unsigned short htab) } /* - * Return a pointer to the orignal page that has been used to create + * Return a pointer to the original page that has been used to create * the buffer. */ void * diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c index da25f8e..8246ef3 100644 --- a/drivers/s390/char/tape_3590.c +++ b/drivers/s390/char/tape_3590.c @@ -1495,7 +1495,7 @@ tape_3590_unit_check(struct tape_device *device, struct tape_request *request, device->cdev->dev.bus_id); return tape_3590_erp_basic(device, request, irb, -EPERM); case 0x8013: - PRINT_WARN("(%s): Another host has priviliged access to the " + PRINT_WARN("(%s): Another host has privileged access to the " "tape device\n", device->cdev->dev.bus_id); PRINT_WARN("(%s): To solve the problem unload the current " "cartridge!\n", device->cdev->dev.bus_id); diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c index eeb92e2..ddc4a11 100644 --- a/drivers/s390/char/tape_block.c +++ b/drivers/s390/char/tape_block.c @@ -74,11 +74,10 @@ tapeblock_trigger_requeue(struct tape_device *device) * Post finished request. */ static void -tapeblock_end_request(struct request *req, int uptodate) +tapeblock_end_request(struct request *req, int error) { - if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) + if (__blk_end_request(req, error, blk_rq_bytes(req))) BUG(); - end_that_request_last(req, uptodate); } static void @@ -91,7 +90,7 @@ __tapeblock_end_request(struct tape_request *ccw_req, void *data) device = ccw_req->device; req = (struct request *) data; - tapeblock_end_request(req, ccw_req->rc == 0); + tapeblock_end_request(req, (ccw_req->rc == 0) ? 0 : -EIO); if (ccw_req->rc == 0) /* Update position. */ device->blk_data.block_position = @@ -119,7 +118,7 @@ tapeblock_start_request(struct tape_device *device, struct request *req) ccw_req = device->discipline->bread(device, req); if (IS_ERR(ccw_req)) { DBF_EVENT(1, "TBLOCK: bread failed\n"); - tapeblock_end_request(req, 0); + tapeblock_end_request(req, -EIO); return PTR_ERR(ccw_req); } ccw_req->callback = __tapeblock_end_request; @@ -132,7 +131,7 @@ tapeblock_start_request(struct tape_device *device, struct request *req) * Start/enqueueing failed. No retries in * this case. */ - tapeblock_end_request(req, 0); + tapeblock_end_request(req, -EIO); device->discipline->free_bread(ccw_req); } @@ -177,7 +176,7 @@ tapeblock_requeue(struct work_struct *work) { if (rq_data_dir(req) == WRITE) { DBF_EVENT(1, "TBLOCK: Rejecting write request\n"); blkdev_dequeue_request(req); - tapeblock_end_request(req, 0); + tapeblock_end_request(req, -EIO); continue; } spin_unlock_irq(&device->blk_data.request_queue_lock); diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c index 2fae633..7ad8cf1 100644 --- a/drivers/s390/char/tape_core.c +++ b/drivers/s390/char/tape_core.c @@ -37,7 +37,7 @@ static void tape_long_busy_timeout(unsigned long data); * we can assign the devices to minor numbers of the same major * The list is protected by the rwlock */ -static struct list_head tape_device_list = LIST_HEAD_INIT(tape_device_list); +static LIST_HEAD(tape_device_list); static DEFINE_RWLOCK(tape_device_lock); /* diff --git a/drivers/s390/char/tape_proc.c b/drivers/s390/char/tape_proc.c index cea49f0..c9b96d5 100644 --- a/drivers/s390/char/tape_proc.c +++ b/drivers/s390/char/tape_proc.c @@ -97,7 +97,7 @@ static void tape_proc_stop(struct seq_file *m, void *v) { } -static struct seq_operations tape_proc_seq = { +static const struct seq_operations tape_proc_seq = { .start = tape_proc_start, .next = tape_proc_next, .stop = tape_proc_stop, diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c index e0c4c50..d364e0b 100644 --- a/drivers/s390/char/vmlogrdr.c +++ b/drivers/s390/char/vmlogrdr.c @@ -683,7 +683,7 @@ static int vmlogrdr_register_driver(void) /* Register with iucv driver */ ret = iucv_register(&vmlogrdr_iucv_handler, 1); if (ret) { - printk (KERN_ERR "vmlogrdr: failed to register with" + printk (KERN_ERR "vmlogrdr: failed to register with " "iucv driver\n"); goto out; } diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c index d70a6e6..7689b50 100644 --- a/drivers/s390/char/vmur.c +++ b/drivers/s390/char/vmur.c @@ -759,7 +759,7 @@ static loff_t ur_llseek(struct file *file, loff_t offset, int whence) return newpos; } -static struct file_operations ur_fops = { +static const struct file_operations ur_fops = { .owner = THIS_MODULE, .open = ur_open, .release = ur_release, diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index 7073daf..f523501 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -470,7 +470,7 @@ static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) return rc; } -static struct file_operations zcore_fops = { +static const struct file_operations zcore_fops = { .owner = THIS_MODULE, .llseek = zcore_lseek, .read = zcore_read, diff --git a/drivers/s390/cio/airq.c b/drivers/s390/cio/airq.c index 5287631..b7a07a8 100644 --- a/drivers/s390/cio/airq.c +++ b/drivers/s390/cio/airq.c @@ -1,12 +1,12 @@ /* * drivers/s390/cio/airq.c - * S/390 common I/O routines -- support for adapter interruptions + * Support for adapter interruptions * - * Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH, - * IBM Corporation - * Author(s): Ingo Adlung (adlung@de.ibm.com) - * Cornelia Huck (cornelia.huck@de.ibm.com) - * Arnd Bergmann (arndb@de.ibm.com) + * Copyright IBM Corp. 1999,2007 + * Author(s): Ingo Adlung <adlung@de.ibm.com> + * Cornelia Huck <cornelia.huck@de.ibm.com> + * Arnd Bergmann <arndb@de.ibm.com> + * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> */ #include <linux/init.h> @@ -14,72 +14,131 @@ #include <linux/slab.h> #include <linux/rcupdate.h> +#include <asm/airq.h> + +#include "cio.h" #include "cio_debug.h" -#include "airq.h" -static adapter_int_handler_t adapter_handler; +#define NR_AIRQS 32 +#define NR_AIRQS_PER_WORD sizeof(unsigned long) +#define NR_AIRQ_WORDS (NR_AIRQS / NR_AIRQS_PER_WORD) -/* - * register for adapter interrupts - * - * With HiperSockets the zSeries architecture provides for - * means of adapter interrups, pseudo I/O interrupts that are - * not tied to an I/O subchannel, but to an adapter. However, - * it doesn't disclose the info how to enable/disable them, but - * to recognize them only. Perhaps we should consider them - * being shared interrupts, and thus build a linked list - * of adapter handlers ... to be evaluated ... - */ -int -s390_register_adapter_interrupt (adapter_int_handler_t handler) -{ - int ret; - char dbf_txt[15]; +union indicator_t { + unsigned long word[NR_AIRQ_WORDS]; + unsigned char byte[NR_AIRQS]; +} __attribute__((packed)); - CIO_TRACE_EVENT (4, "rgaint"); +struct airq_t { + adapter_int_handler_t handler; + void *drv_data; +}; - if (handler == NULL) - ret = -EINVAL; - else - ret = (cmpxchg(&adapter_handler, NULL, handler) ? -EBUSY : 0); - if (!ret) - synchronize_sched(); /* Allow interrupts to complete. */ +static union indicator_t indicators; +static struct airq_t *airqs[NR_AIRQS]; - sprintf (dbf_txt, "ret:%d", ret); - CIO_TRACE_EVENT (4, dbf_txt); +static int register_airq(struct airq_t *airq) +{ + int i; - return ret; + for (i = 0; i < NR_AIRQS; i++) + if (!cmpxchg(&airqs[i], NULL, airq)) + return i; + return -ENOMEM; } -int -s390_unregister_adapter_interrupt (adapter_int_handler_t handler) +/** + * s390_register_adapter_interrupt() - register adapter interrupt handler + * @handler: adapter handler to be registered + * @drv_data: driver data passed with each call to the handler + * + * Returns: + * Pointer to the indicator to be used on success + * ERR_PTR() if registration failed + */ +void *s390_register_adapter_interrupt(adapter_int_handler_t handler, + void *drv_data) { + struct airq_t *airq; + char dbf_txt[16]; int ret; - char dbf_txt[15]; - CIO_TRACE_EVENT (4, "urgaint"); - - if (handler == NULL) - ret = -EINVAL; - else { - adapter_handler = NULL; - synchronize_sched(); /* Allow interrupts to complete. */ - ret = 0; + airq = kmalloc(sizeof(struct airq_t), GFP_KERNEL); + if (!airq) { + ret = -ENOMEM; + goto out; } - sprintf (dbf_txt, "ret:%d", ret); - CIO_TRACE_EVENT (4, dbf_txt); - - return ret; + airq->handler = handler; + airq->drv_data = drv_data; + ret = register_airq(airq); + if (ret < 0) + kfree(airq); +out: + snprintf(dbf_txt, sizeof(dbf_txt), "rairq:%d", ret); + CIO_TRACE_EVENT(4, dbf_txt); + if (ret < 0) + return ERR_PTR(ret); + else + return &indicators.byte[ret]; } +EXPORT_SYMBOL(s390_register_adapter_interrupt); -void -do_adapter_IO (void) +/** + * s390_unregister_adapter_interrupt - unregister adapter interrupt handler + * @ind: indicator for which the handler is to be unregistered + */ +void s390_unregister_adapter_interrupt(void *ind) { - CIO_TRACE_EVENT (6, "doaio"); + struct airq_t *airq; + char dbf_txt[16]; + int i; - if (adapter_handler) - (*adapter_handler) (); + i = (int) ((addr_t) ind) - ((addr_t) &indicators.byte[0]); + snprintf(dbf_txt, sizeof(dbf_txt), "urairq:%d", i); + CIO_TRACE_EVENT(4, dbf_txt); + indicators.byte[i] = 0; + airq = xchg(&airqs[i], NULL); + /* + * Allow interrupts to complete. This will ensure that the airq handle + * is no longer referenced by any interrupt handler. + */ + synchronize_sched(); + kfree(airq); } +EXPORT_SYMBOL(s390_unregister_adapter_interrupt); + +#define INDICATOR_MASK (0xffUL << ((NR_AIRQS_PER_WORD - 1) * 8)) -EXPORT_SYMBOL (s390_register_adapter_interrupt); -EXPORT_SYMBOL (s390_unregister_adapter_interrupt); +void do_adapter_IO(void) +{ + int w; + int i; + unsigned long word; + struct airq_t *airq; + + /* + * Access indicator array in word-sized chunks to minimize storage + * fetch operations. + */ + for (w = 0; w < NR_AIRQ_WORDS; w++) { + word = indicators.word[w]; + i = w * NR_AIRQS_PER_WORD; + /* + * Check bytes within word for active indicators. + */ + while (word) { + if (word & INDICATOR_MASK) { + airq = airqs[i]; + if (likely(airq)) + airq->handler(&indicators.byte[i], + airq->drv_data); + else + /* + * Reset ill-behaved indicator. + */ + indicators.byte[i] = 0; + } + word <<= 8; + i++; + } + } +} diff --git a/drivers/s390/cio/airq.h b/drivers/s390/cio/airq.h deleted file mode 100644 index 7d6be3f..0000000 --- a/drivers/s390/cio/airq.h +++ /dev/null @@ -1,10 +0,0 @@ -#ifndef S390_AINTERRUPT_H -#define S390_AINTERRUPT_H - -typedef int (*adapter_int_handler_t)(void); - -extern int s390_register_adapter_interrupt(adapter_int_handler_t handler); -extern int s390_unregister_adapter_interrupt(adapter_int_handler_t handler); -extern void do_adapter_IO (void); - -#endif diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c index bd5f16f..e8597ec 100644 --- a/drivers/s390/cio/blacklist.c +++ b/drivers/s390/cio/blacklist.c @@ -348,7 +348,7 @@ cio_ignore_write(struct file *file, const char __user *user_buf, return user_len; } -static struct seq_operations cio_ignore_proc_seq_ops = { +static const struct seq_operations cio_ignore_proc_seq_ops = { .start = cio_ignore_proc_seq_start, .stop = cio_ignore_proc_seq_stop, .next = cio_ignore_proc_seq_next, diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c index 5baa517..3964056 100644 --- a/drivers/s390/cio/ccwgroup.c +++ b/drivers/s390/cio/ccwgroup.c @@ -35,8 +35,8 @@ ccwgroup_bus_match (struct device * dev, struct device_driver * drv) struct ccwgroup_device *gdev; struct ccwgroup_driver *gdrv; - gdev = container_of(dev, struct ccwgroup_device, dev); - gdrv = container_of(drv, struct ccwgroup_driver, driver); + gdev = to_ccwgroupdev(dev); + gdrv = to_ccwgroupdrv(drv); if (gdev->creator_id == gdrv->driver_id) return 1; @@ -75,8 +75,10 @@ static void ccwgroup_ungroup_callback(struct device *dev) struct ccwgroup_device *gdev = to_ccwgroupdev(dev); mutex_lock(&gdev->reg_mutex); - __ccwgroup_remove_symlinks(gdev); - device_unregister(dev); + if (device_is_registered(&gdev->dev)) { + __ccwgroup_remove_symlinks(gdev); + device_unregister(dev); + } mutex_unlock(&gdev->reg_mutex); } @@ -111,7 +113,7 @@ ccwgroup_release (struct device *dev) gdev = to_ccwgroupdev(dev); for (i = 0; i < gdev->count; i++) { - gdev->cdev[i]->dev.driver_data = NULL; + dev_set_drvdata(&gdev->cdev[i]->dev, NULL); put_device(&gdev->cdev[i]->dev); } kfree(gdev); @@ -196,11 +198,11 @@ int ccwgroup_create(struct device *root, unsigned int creator_id, goto error; } /* Don't allow a device to belong to more than one group. */ - if (gdev->cdev[i]->dev.driver_data) { + if (dev_get_drvdata(&gdev->cdev[i]->dev)) { rc = -EINVAL; goto error; } - gdev->cdev[i]->dev.driver_data = gdev; + dev_set_drvdata(&gdev->cdev[i]->dev, gdev); } gdev->creator_id = creator_id; @@ -234,8 +236,8 @@ int ccwgroup_create(struct device *root, unsigned int creator_id, error: for (i = 0; i < argc; i++) if (gdev->cdev[i]) { - if (gdev->cdev[i]->dev.driver_data == gdev) - gdev->cdev[i]->dev.driver_data = NULL; + if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev) + dev_set_drvdata(&gdev->cdev[i]->dev, NULL); put_device(&gdev->cdev[i]->dev); } mutex_unlock(&gdev->reg_mutex); @@ -408,6 +410,7 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver) /* register our new driver with the core */ cdriver->driver.bus = &ccwgroup_bus_type; cdriver->driver.name = cdriver->name; + cdriver->driver.owner = cdriver->owner; return driver_register(&cdriver->driver); } @@ -463,8 +466,8 @@ __ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev) { struct ccwgroup_device *gdev; - if (cdev->dev.driver_data) { - gdev = (struct ccwgroup_device *)cdev->dev.driver_data; + gdev = dev_get_drvdata(&cdev->dev); + if (gdev) { if (get_device(&gdev->dev)) { mutex_lock(&gdev->reg_mutex); if (device_is_registered(&gdev->dev)) diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 597c0c7..e7ba16a 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -89,7 +89,8 @@ int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) /* Copy data */ ret = 0; memset(ssd, 0, sizeof(struct chsc_ssd_info)); - if ((ssd_area->st != 0) && (ssd_area->st != 2)) + if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && + (ssd_area->st != SUBCHANNEL_TYPE_MSG)) goto out_free; ssd->path_mask = ssd_area->path_mask; ssd->fla_valid_mask = ssd_area->fla_valid_mask; @@ -132,20 +133,16 @@ static void terminate_internal_io(struct subchannel *sch) device_set_intretry(sch); /* Call handler. */ if (sch->driver && sch->driver->termination) - sch->driver->termination(&sch->dev); + sch->driver->termination(sch); } -static int -s390_subchannel_remove_chpid(struct device *dev, void *data) +static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) { int j; int mask; - struct subchannel *sch; - struct chp_id *chpid; + struct chp_id *chpid = data; struct schib schib; - sch = to_subchannel(dev); - chpid = data; for (j = 0; j < 8; j++) { mask = 0x80 >> j; if ((sch->schib.pmcw.pim & mask) && @@ -158,7 +155,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data) spin_lock_irq(sch->lock); stsch(sch->schid, &schib); - if (!schib.pmcw.dnv) + if (!css_sch_is_valid(&schib)) goto out_unreg; memcpy(&sch->schib, &schib, sizeof(struct schib)); /* Check for single path devices. */ @@ -172,12 +169,12 @@ s390_subchannel_remove_chpid(struct device *dev, void *data) terminate_internal_io(sch); /* Re-start path verification. */ if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); } } else { /* trigger path verification. */ if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); else if (sch->lpm == mask) goto out_unreg; } @@ -201,12 +198,10 @@ void chsc_chp_offline(struct chp_id chpid) if (chp_get_status(chpid) <= 0) return; - bus_for_each_dev(&css_bus_type, NULL, &chpid, - s390_subchannel_remove_chpid); + for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &chpid); } -static int -s390_process_res_acc_new_sch(struct subchannel_id schid) +static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) { struct schib schib; /* @@ -252,18 +247,10 @@ static int get_res_chpid_mask(struct chsc_ssd_info *ssd, return 0; } -static int -__s390_process_res_acc(struct subchannel_id schid, void *data) +static int __s390_process_res_acc(struct subchannel *sch, void *data) { int chp_mask, old_lpm; - struct res_acc_data *res_data; - struct subchannel *sch; - - res_data = data; - sch = get_subchannel_by_schid(schid); - if (!sch) - /* Check if a subchannel is newly available. */ - return s390_process_res_acc_new_sch(schid); + struct res_acc_data *res_data = data; spin_lock_irq(sch->lock); chp_mask = get_res_chpid_mask(&sch->ssd_info, res_data); @@ -279,10 +266,10 @@ __s390_process_res_acc(struct subchannel_id schid, void *data) if (!old_lpm && sch->lpm) device_trigger_reprobe(sch); else if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); out: spin_unlock_irq(sch->lock); - put_device(&sch->dev); + return 0; } @@ -305,7 +292,8 @@ static void s390_process_res_acc (struct res_acc_data *res_data) * The more information we have (info), the less scanning * will we have to do. */ - for_each_subchannel(__s390_process_res_acc, res_data); + for_each_subchannel_staged(__s390_process_res_acc, + s390_process_res_acc_new_sch, res_data); } static int @@ -499,8 +487,7 @@ void chsc_process_crw(void) } while (sei_area->flags & 0x80); } -static int -__chp_add_new_sch(struct subchannel_id schid) +static int __chp_add_new_sch(struct subchannel_id schid, void *data) { struct schib schib; @@ -514,45 +501,37 @@ __chp_add_new_sch(struct subchannel_id schid) } -static int -__chp_add(struct subchannel_id schid, void *data) +static int __chp_add(struct subchannel *sch, void *data) { int i, mask; - struct chp_id *chpid; - struct subchannel *sch; - - chpid = data; - sch = get_subchannel_by_schid(schid); - if (!sch) - /* Check if the subchannel is now available. */ - return __chp_add_new_sch(schid); + struct chp_id *chpid = data; + spin_lock_irq(sch->lock); for (i=0; i<8; i++) { mask = 0x80 >> i; if ((sch->schib.pmcw.pim & mask) && - (sch->schib.pmcw.chpid[i] == chpid->id)) { - if (stsch(sch->schid, &sch->schib) != 0) { - /* Endgame. */ - spin_unlock_irq(sch->lock); - return -ENXIO; - } + (sch->schib.pmcw.chpid[i] == chpid->id)) break; - } } if (i==8) { spin_unlock_irq(sch->lock); return 0; } + if (stsch(sch->schid, &sch->schib)) { + spin_unlock_irq(sch->lock); + css_schedule_eval(sch->schid); + return 0; + } sch->lpm = ((sch->schib.pmcw.pim & sch->schib.pmcw.pam & sch->schib.pmcw.pom) | mask) & sch->opm; if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); spin_unlock_irq(sch->lock); - put_device(&sch->dev); + return 0; } @@ -564,7 +543,8 @@ void chsc_chp_online(struct chp_id chpid) CIO_TRACE_EVENT(2, dbf_txt); if (chp_get_status(chpid) != 0) - for_each_subchannel(__chp_add, &chpid); + for_each_subchannel_staged(__chp_add, __chp_add_new_sch, + &chpid); } static void __s390_subchannel_vary_chpid(struct subchannel *sch, @@ -589,7 +569,7 @@ static void __s390_subchannel_vary_chpid(struct subchannel *sch, if (!old_lpm) device_trigger_reprobe(sch); else if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); break; } sch->opm &= ~mask; @@ -603,37 +583,29 @@ static void __s390_subchannel_vary_chpid(struct subchannel *sch, terminate_internal_io(sch); /* Re-start path verification. */ if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); } } else if (!sch->lpm) { if (device_trigger_verify(sch) != 0) css_schedule_eval(sch->schid); } else if (sch->driver && sch->driver->verify) - sch->driver->verify(&sch->dev); + sch->driver->verify(sch); break; } spin_unlock_irqrestore(sch->lock, flags); } -static int s390_subchannel_vary_chpid_off(struct device *dev, void *data) +static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) { - struct subchannel *sch; - struct chp_id *chpid; - - sch = to_subchannel(dev); - chpid = data; + struct chp_id *chpid = data; __s390_subchannel_vary_chpid(sch, *chpid, 0); return 0; } -static int s390_subchannel_vary_chpid_on(struct device *dev, void *data) +static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) { - struct subchannel *sch; - struct chp_id *chpid; - - sch = to_subchannel(dev); - chpid = data; + struct chp_id *chpid = data; __s390_subchannel_vary_chpid(sch, *chpid, 1); return 0; @@ -643,13 +615,7 @@ static int __s390_vary_chpid_on(struct subchannel_id schid, void *data) { struct schib schib; - struct subchannel *sch; - sch = get_subchannel_by_schid(schid); - if (sch) { - put_device(&sch->dev); - return 0; - } if (stsch_err(schid, &schib)) /* We're through */ return -ENXIO; @@ -669,12 +635,13 @@ int chsc_chp_vary(struct chp_id chpid, int on) * Redo PathVerification on the devices the chpid connects to */ - bus_for_each_dev(&css_bus_type, NULL, &chpid, on ? - s390_subchannel_vary_chpid_on : - s390_subchannel_vary_chpid_off); if (on) - /* Scan for new devices on varied on path. */ - for_each_subchannel(__s390_vary_chpid_on, NULL); + for_each_subchannel_staged(s390_subchannel_vary_chpid_on, + __s390_vary_chpid_on, &chpid); + else + for_each_subchannel_staged(s390_subchannel_vary_chpid_off, + NULL, &chpid); + return 0; } @@ -1075,7 +1042,7 @@ chsc_determine_css_characteristics(void) scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); if (!scsc_area) { - CIO_MSG_EVENT(0, "Was not able to determine available" + CIO_MSG_EVENT(0, "Was not able to determine available " "CHSCs due to no memory.\n"); return -ENOMEM; } diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 4690534..60590a1 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -23,11 +23,12 @@ #include <asm/reset.h> #include <asm/ipl.h> #include <asm/chpid.h> -#include "airq.h" +#include <asm/airq.h> #include "cio.h" #include "css.h" #include "chsc.h" #include "ioasm.h" +#include "io_sch.h" #include "blacklist.h" #include "cio_debug.h" #include "chp.h" @@ -56,39 +57,37 @@ __setup ("cio_msg=", cio_setup); /* * Function: cio_debug_init - * Initializes three debug logs (under /proc/s390dbf) for common I/O: - * - cio_msg logs the messages which are printk'ed when CONFIG_DEBUG_IO is on + * Initializes three debug logs for common I/O: + * - cio_msg logs generic cio messages * - cio_trace logs the calling of different functions - * - cio_crw logs the messages which are printk'ed when CONFIG_DEBUG_CRW is on - * debug levels depend on CONFIG_DEBUG_IO resp. CONFIG_DEBUG_CRW + * - cio_crw logs machine check related cio messages */ -static int __init -cio_debug_init (void) +static int __init cio_debug_init(void) { - cio_debug_msg_id = debug_register ("cio_msg", 16, 4, 16*sizeof (long)); + cio_debug_msg_id = debug_register("cio_msg", 16, 1, 16 * sizeof(long)); if (!cio_debug_msg_id) goto out_unregister; - debug_register_view (cio_debug_msg_id, &debug_sprintf_view); - debug_set_level (cio_debug_msg_id, 2); - cio_debug_trace_id = debug_register ("cio_trace", 16, 4, 16); + debug_register_view(cio_debug_msg_id, &debug_sprintf_view); + debug_set_level(cio_debug_msg_id, 2); + cio_debug_trace_id = debug_register("cio_trace", 16, 1, 16); if (!cio_debug_trace_id) goto out_unregister; - debug_register_view (cio_debug_trace_id, &debug_hex_ascii_view); - debug_set_level (cio_debug_trace_id, 2); - cio_debug_crw_id = debug_register ("cio_crw", 4, 4, 16*sizeof (long)); + debug_register_view(cio_debug_trace_id, &debug_hex_ascii_view); + debug_set_level(cio_debug_trace_id, 2); + cio_debug_crw_id = debug_register("cio_crw", 16, 1, 16 * sizeof(long)); if (!cio_debug_crw_id) goto out_unregister; - debug_register_view (cio_debug_crw_id, &debug_sprintf_view); - debug_set_level (cio_debug_crw_id, 2); + debug_register_view(cio_debug_crw_id, &debug_sprintf_view); + debug_set_level(cio_debug_crw_id, 4); return 0; out_unregister: if (cio_debug_msg_id) - debug_unregister (cio_debug_msg_id); + debug_unregister(cio_debug_msg_id); if (cio_debug_trace_id) - debug_unregister (cio_debug_trace_id); + debug_unregister(cio_debug_trace_id); if (cio_debug_crw_id) - debug_unregister (cio_debug_crw_id); + debug_unregister(cio_debug_crw_id); printk(KERN_WARNING"cio: could not initialize debugging\n"); return -1; } @@ -147,7 +146,7 @@ cio_tpi(void) spin_lock(sch->lock); memcpy (&sch->schib.scsw, &irb->scsw, sizeof (struct scsw)); if (sch->driver && sch->driver->irq) - sch->driver->irq(&sch->dev); + sch->driver->irq(sch); spin_unlock(sch->lock); irq_exit (); _local_bh_enable(); @@ -184,33 +183,35 @@ cio_start_key (struct subchannel *sch, /* subchannel structure */ { char dbf_txt[15]; int ccode; + struct orb *orb; - CIO_TRACE_EVENT (4, "stIO"); - CIO_TRACE_EVENT (4, sch->dev.bus_id); + CIO_TRACE_EVENT(4, "stIO"); + CIO_TRACE_EVENT(4, sch->dev.bus_id); + orb = &to_io_private(sch)->orb; /* sch is always under 2G. */ - sch->orb.intparm = (__u32)(unsigned long)sch; - sch->orb.fmt = 1; + orb->intparm = (u32)(addr_t)sch; + orb->fmt = 1; - sch->orb.pfch = sch->options.prefetch == 0; - sch->orb.spnd = sch->options.suspend; - sch->orb.ssic = sch->options.suspend && sch->options.inter; - sch->orb.lpm = (lpm != 0) ? lpm : sch->lpm; + orb->pfch = sch->options.prefetch == 0; + orb->spnd = sch->options.suspend; + orb->ssic = sch->options.suspend && sch->options.inter; + orb->lpm = (lpm != 0) ? lpm : sch->lpm; #ifdef CONFIG_64BIT /* * for 64 bit we always support 64 bit IDAWs with 4k page size only */ - sch->orb.c64 = 1; - sch->orb.i2k = 0; + orb->c64 = 1; + orb->i2k = 0; #endif - sch->orb.key = key >> 4; + orb->key = key >> 4; /* issue "Start Subchannel" */ - sch->orb.cpa = (__u32) __pa (cpa); - ccode = ssch (sch->schid, &sch->orb); + orb->cpa = (__u32) __pa(cpa); + ccode = ssch(sch->schid, orb); /* process condition code */ - sprintf (dbf_txt, "ccode:%d", ccode); - CIO_TRACE_EVENT (4, dbf_txt); + sprintf(dbf_txt, "ccode:%d", ccode); + CIO_TRACE_EVENT(4, dbf_txt); switch (ccode) { case 0: @@ -405,8 +406,8 @@ cio_modify (struct subchannel *sch) /* * Enable subchannel. */ -int -cio_enable_subchannel (struct subchannel *sch, unsigned int isc) +int cio_enable_subchannel(struct subchannel *sch, unsigned int isc, + u32 intparm) { char dbf_txt[15]; int ccode; @@ -425,7 +426,7 @@ cio_enable_subchannel (struct subchannel *sch, unsigned int isc) for (retry = 5, ret = 0; retry > 0; retry--) { sch->schib.pmcw.ena = 1; sch->schib.pmcw.isc = isc; - sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; + sch->schib.pmcw.intparm = intparm; ret = cio_modify(sch); if (ret == -ENODEV) break; @@ -567,7 +568,7 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid) */ if (sch->st != 0) { CIO_DEBUG(KERN_INFO, 0, - "cio: Subchannel 0.%x.%04x reports " + "Subchannel 0.%x.%04x reports " "non-I/O subchannel type %04X\n", sch->schid.ssid, sch->schid.sch_no, sch->st); /* We stop here for non-io subchannels. */ @@ -576,11 +577,11 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid) } /* Initialization for io subchannels. */ - if (!sch->schib.pmcw.dnv) { - /* io subchannel but device number is invalid. */ + if (!css_sch_is_valid(&sch->schib)) { err = -ENODEV; goto out; } + /* Devno is valid. */ if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) { /* @@ -600,7 +601,7 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid) sch->lpm = sch->schib.pmcw.pam & sch->opm; CIO_DEBUG(KERN_INFO, 0, - "cio: Detected device %04x on subchannel 0.%x.%04X" + "Detected device %04x on subchannel 0.%x.%04X" " - PIM = %02X, PAM = %02X, POM = %02X\n", sch->schib.pmcw.dev, sch->schid.ssid, sch->schid.sch_no, sch->schib.pmcw.pim, @@ -680,7 +681,7 @@ do_IRQ (struct pt_regs *regs) sizeof (irb->scsw)); /* Call interrupt handler if there is one. */ if (sch->driver && sch->driver->irq) - sch->driver->irq(&sch->dev); + sch->driver->irq(sch); } if (sch) spin_unlock(sch->lock); @@ -698,8 +699,14 @@ do_IRQ (struct pt_regs *regs) #ifdef CONFIG_CCW_CONSOLE static struct subchannel console_subchannel; +static struct io_subchannel_private console_priv; static int console_subchannel_in_use; +void *cio_get_console_priv(void) +{ + return &console_priv; +} + /* * busy wait for the next interrupt on the console */ @@ -738,9 +745,9 @@ cio_test_for_console(struct subchannel_id schid, void *data) { if (stsch_err(schid, &console_subchannel.schib) != 0) return -ENXIO; - if (console_subchannel.schib.pmcw.dnv && - console_subchannel.schib.pmcw.dev == - console_devno) { + if ((console_subchannel.schib.pmcw.st == SUBCHANNEL_TYPE_IO) && + console_subchannel.schib.pmcw.dnv && + (console_subchannel.schib.pmcw.dev == console_devno)) { console_irq = schid.sch_no; return 1; /* found */ } @@ -758,6 +765,7 @@ cio_get_console_sch_no(void) /* VM provided us with the irq number of the console. */ schid.sch_no = console_irq; if (stsch(schid, &console_subchannel.schib) != 0 || + (console_subchannel.schib.pmcw.st != SUBCHANNEL_TYPE_IO) || !console_subchannel.schib.pmcw.dnv) return -1; console_devno = console_subchannel.schib.pmcw.dev; @@ -804,7 +812,7 @@ cio_probe_console(void) ctl_set_bit(6, 24); console_subchannel.schib.pmcw.isc = 7; console_subchannel.schib.pmcw.intparm = - (__u32)(unsigned long)&console_subchannel; + (u32)(addr_t)&console_subchannel; ret = cio_modify(&console_subchannel); if (ret) { console_subchannel_in_use = 0; @@ -1022,7 +1030,7 @@ static int __reipl_subchannel_match(struct subchannel_id schid, void *data) if (stsch_reset(schid, &schib)) return -ENXIO; - if (schib.pmcw.dnv && + if ((schib.pmcw.st == SUBCHANNEL_TYPE_IO) && schib.pmcw.dnv && (schib.pmcw.dev == match_id->devid.devno) && (schid.ssid == match_id->devid.ssid)) { match_id->schid = schid; @@ -1068,6 +1076,8 @@ int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo) return -ENODEV; if (stsch(schid, &schib)) return -ENODEV; + if (schib.pmcw.st != SUBCHANNEL_TYPE_IO) + return -ENODEV; if (!schib.pmcw.dnv) return -ENODEV; iplinfo->devno = schib.pmcw.dev; diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index 7446c399..52afa4c 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -11,32 +11,32 @@ * path management control word */ struct pmcw { - __u32 intparm; /* interruption parameter */ - __u32 qf : 1; /* qdio facility */ - __u32 res0 : 1; /* reserved zeros */ - __u32 isc : 3; /* interruption sublass */ - __u32 res5 : 3; /* reserved zeros */ - __u32 ena : 1; /* enabled */ - __u32 lm : 2; /* limit mode */ - __u32 mme : 2; /* measurement-mode enable */ - __u32 mp : 1; /* multipath mode */ - __u32 tf : 1; /* timing facility */ - __u32 dnv : 1; /* device number valid */ - __u32 dev : 16; /* device number */ - __u8 lpm; /* logical path mask */ - __u8 pnom; /* path not operational mask */ - __u8 lpum; /* last path used mask */ - __u8 pim; /* path installed mask */ - __u16 mbi; /* measurement-block index */ - __u8 pom; /* path operational mask */ - __u8 pam; /* path available mask */ - __u8 chpid[8]; /* CHPID 0-7 (if available) */ - __u32 unused1 : 8; /* reserved zeros */ - __u32 st : 3; /* subchannel type */ - __u32 unused2 : 18; /* reserved zeros */ - __u32 mbfc : 1; /* measurement block format control */ - __u32 xmwme : 1; /* extended measurement word mode enable */ - __u32 csense : 1; /* concurrent sense; can be enabled ...*/ + u32 intparm; /* interruption parameter */ + u32 qf : 1; /* qdio facility */ + u32 res0 : 1; /* reserved zeros */ + u32 isc : 3; /* interruption sublass */ + u32 res5 : 3; /* reserved zeros */ + u32 ena : 1; /* enabled */ + u32 lm : 2; /* limit mode */ + u32 mme : 2; /* measurement-mode enable */ + u32 mp : 1; /* multipath mode */ + u32 tf : 1; /* timing facility */ + u32 dnv : 1; /* device number valid */ + u32 dev : 16; /* device number */ + u8 lpm; /* logical path mask */ + u8 pnom; /* path not operational mask */ + u8 lpum; /* last path used mask */ + u8 pim; /* path installed mask */ + u16 mbi; /* measurement-block index */ + u8 pom; /* path operational mask */ + u8 pam; /* path available mask */ + u8 chpid[8]; /* CHPID 0-7 (if available) */ + u32 unused1 : 8; /* reserved zeros */ + u32 st : 3; /* subchannel type */ + u32 unused2 : 18; /* reserved zeros */ + u32 mbfc : 1; /* measurement block format control */ + u32 xmwme : 1; /* extended measurement word mode enable */ + u32 csense : 1; /* concurrent sense; can be enabled ...*/ /* ... per MSCH, however, if facility */ /* ... is not installed, this results */ /* ... in an operand exception. */ @@ -52,31 +52,6 @@ struct schib { __u8 mda[4]; /* model dependent area */ } __attribute__ ((packed,aligned(4))); -/* - * operation request block - */ -struct orb { - __u32 intparm; /* interruption parameter */ - __u32 key : 4; /* flags, like key, suspend control, etc. */ - __u32 spnd : 1; /* suspend control */ - __u32 res1 : 1; /* reserved */ - __u32 mod : 1; /* modification control */ - __u32 sync : 1; /* synchronize control */ - __u32 fmt : 1; /* format control */ - __u32 pfch : 1; /* prefetch control */ - __u32 isic : 1; /* initial-status-interruption control */ - __u32 alcc : 1; /* address-limit-checking control */ - __u32 ssic : 1; /* suppress-suspended-interr. control */ - __u32 res2 : 1; /* reserved */ - __u32 c64 : 1; /* IDAW/QDIO 64 bit control */ - __u32 i2k : 1; /* IDAW 2/4kB block size control */ - __u32 lpm : 8; /* logical path mask */ - __u32 ils : 1; /* incorrect length */ - __u32 zero : 6; /* reserved zeros */ - __u32 orbx : 1; /* ORB extension control */ - __u32 cpa; /* channel program address */ -} __attribute__ ((packed,aligned(4))); - /* subchannel data structure used by I/O subroutines */ struct subchannel { struct subchannel_id schid; @@ -85,7 +60,7 @@ struct subchannel { enum { SUBCHANNEL_TYPE_IO = 0, SUBCHANNEL_TYPE_CHSC = 1, - SUBCHANNEL_TYPE_MESSAGE = 2, + SUBCHANNEL_TYPE_MSG = 2, SUBCHANNEL_TYPE_ADM = 3, } st; /* subchannel type */ @@ -99,11 +74,10 @@ struct subchannel { __u8 lpm; /* logical path mask */ __u8 opm; /* operational path mask */ struct schib schib; /* subchannel information block */ - struct orb orb; /* operation request block */ - struct ccw1 sense_ccw; /* static ccw for sense command */ struct chsc_ssd_info ssd_info; /* subchannel description */ struct device dev; /* entry in device tree */ struct css_driver *driver; + void *private; /* private per subchannel type data */ } __attribute__ ((aligned(8))); #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ @@ -111,7 +85,7 @@ struct subchannel { #define to_subchannel(n) container_of(n, struct subchannel, dev) extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); -extern int cio_enable_subchannel (struct subchannel *, unsigned int); +extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32); extern int cio_disable_subchannel (struct subchannel *); extern int cio_cancel (struct subchannel *); extern int cio_clear (struct subchannel *); @@ -125,6 +99,7 @@ extern int cio_get_options (struct subchannel *); extern int cio_modify (struct subchannel *); int cio_create_sch_lock(struct subchannel *); +void do_adapter_IO(void); /* Use with care. */ #ifdef CONFIG_CCW_CONSOLE @@ -133,10 +108,12 @@ extern void cio_release_console(void); extern int cio_is_console(struct subchannel_id); extern struct subchannel *cio_get_console_subchannel(void); extern spinlock_t * cio_get_console_lock(void); +extern void *cio_get_console_priv(void); #else #define cio_is_console(schid) 0 #define cio_get_console_subchannel() NULL -#define cio_get_console_lock() NULL; +#define cio_get_console_lock() NULL +#define cio_get_console_priv() NULL #endif extern int cio_show_msg; diff --git a/drivers/s390/cio/cio_debug.h b/drivers/s390/cio/cio_debug.h index c9bf898..d7429ef 100644 --- a/drivers/s390/cio/cio_debug.h +++ b/drivers/s390/cio/cio_debug.h @@ -8,20 +8,19 @@ extern debug_info_t *cio_debug_msg_id; extern debug_info_t *cio_debug_trace_id; extern debug_info_t *cio_debug_crw_id; -#define CIO_TRACE_EVENT(imp, txt) do { \ +#define CIO_TRACE_EVENT(imp, txt) do { \ debug_text_event(cio_debug_trace_id, imp, txt); \ } while (0) -#define CIO_MSG_EVENT(imp, args...) do { \ - debug_sprintf_event(cio_debug_msg_id, imp , ##args); \ +#define CIO_MSG_EVENT(imp, args...) do { \ + debug_sprintf_event(cio_debug_msg_id, imp , ##args); \ } while (0) -#define CIO_CRW_EVENT(imp, args...) do { \ - debug_sprintf_event(cio_debug_crw_id, imp , ##args); \ +#define CIO_CRW_EVENT(imp, args...) do { \ + debug_sprintf_event(cio_debug_crw_id, imp , ##args); \ } while (0) -static inline void -CIO_HEX_EVENT(int level, void *data, int length) +static inline void CIO_HEX_EVENT(int level, void *data, int length) { if (unlikely(!cio_debug_trace_id)) return; @@ -32,9 +31,10 @@ CIO_HEX_EVENT(int level, void *data, int length) } } -#define CIO_DEBUG(printk_level,event_level,msg...) ({ \ - if (cio_show_msg) printk(printk_level msg); \ - CIO_MSG_EVENT (event_level, msg); \ -}) +#define CIO_DEBUG(printk_level, event_level, msg...) do { \ + if (cio_show_msg) \ + printk(printk_level "cio: " msg); \ + CIO_MSG_EVENT(event_level, msg); \ + } while (0) #endif diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index c3df2cd..3b45bbe 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -51,6 +51,62 @@ for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *data) return ret; } +struct cb_data { + void *data; + struct idset *set; + int (*fn_known_sch)(struct subchannel *, void *); + int (*fn_unknown_sch)(struct subchannel_id, void *); +}; + +static int call_fn_known_sch(struct device *dev, void *data) +{ + struct subchannel *sch = to_subchannel(dev); + struct cb_data *cb = data; + int rc = 0; + + idset_sch_del(cb->set, sch->schid); + if (cb->fn_known_sch) + rc = cb->fn_known_sch(sch, cb->data); + return rc; +} + +static int call_fn_unknown_sch(struct subchannel_id schid, void *data) +{ + struct cb_data *cb = data; + int rc = 0; + + if (idset_sch_contains(cb->set, schid)) + rc = cb->fn_unknown_sch(schid, cb->data); + return rc; +} + +int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *), + int (*fn_unknown)(struct subchannel_id, + void *), void *data) +{ + struct cb_data cb; + int rc; + + cb.set = idset_sch_new(); + if (!cb.set) + return -ENOMEM; + idset_fill(cb.set); + cb.data = data; + cb.fn_known_sch = fn_known; + cb.fn_unknown_sch = fn_unknown; + /* Process registered subchannels. */ + rc = bus_for_each_dev(&css_bus_type, NULL, &cb, call_fn_known_sch); + if (rc) + goto out; + /* Process unregistered subchannels. */ + if (fn_unknown) + rc = for_each_subchannel(call_fn_unknown_sch, &cb); +out: + idset_free(cb.set); + + return rc; +} + static struct subchannel * css_alloc_subchannel(struct subchannel_id schid) { @@ -77,7 +133,7 @@ css_alloc_subchannel(struct subchannel_id schid) * This is fine even on 64bit since the subchannel is always located * under 2G. */ - sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; + sch->schib.pmcw.intparm = (u32)(addr_t)sch; ret = cio_modify(sch); if (ret) { kfree(sch->lock); @@ -237,11 +293,25 @@ get_subchannel_by_schid(struct subchannel_id schid) return dev ? to_subchannel(dev) : NULL; } +/** + * css_sch_is_valid() - check if a subchannel is valid + * @schib: subchannel information block for the subchannel + */ +int css_sch_is_valid(struct schib *schib) +{ + if ((schib->pmcw.st == SUBCHANNEL_TYPE_IO) && !schib->pmcw.dnv) + return 0; + return 1; +} +EXPORT_SYMBOL_GPL(css_sch_is_valid); + static int css_get_subchannel_status(struct subchannel *sch) { struct schib schib; - if (stsch(sch->schid, &schib) || !schib.pmcw.dnv) + if (stsch(sch->schid, &schib)) + return CIO_GONE; + if (!css_sch_is_valid(&schib)) return CIO_GONE; if (sch->schib.pmcw.dnv && (schib.pmcw.dev != sch->schib.pmcw.dev)) return CIO_REVALIDATE; @@ -293,7 +363,7 @@ static int css_evaluate_known_subchannel(struct subchannel *sch, int slow) action = UNREGISTER; if (sch->driver && sch->driver->notify) { spin_unlock_irqrestore(sch->lock, flags); - ret = sch->driver->notify(&sch->dev, event); + ret = sch->driver->notify(sch, event); spin_lock_irqsave(sch->lock, flags); if (ret) action = NONE; @@ -349,7 +419,7 @@ static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow) /* Will be done on the slow path. */ return -EAGAIN; } - if (stsch_err(schid, &schib) || !schib.pmcw.dnv) { + if (stsch_err(schid, &schib) || !css_sch_is_valid(&schib)) { /* Unusable - ignore. */ return 0; } @@ -388,20 +458,56 @@ static int __init slow_subchannel_init(void) return 0; } -static void css_slow_path_func(struct work_struct *unused) +static int slow_eval_known_fn(struct subchannel *sch, void *data) { - struct subchannel_id schid; + int eval; + int rc; - CIO_TRACE_EVENT(4, "slowpath"); spin_lock_irq(&slow_subchannel_lock); - init_subchannel_id(&schid); - while (idset_sch_get_first(slow_subchannel_set, &schid)) { - idset_sch_del(slow_subchannel_set, schid); - spin_unlock_irq(&slow_subchannel_lock); - css_evaluate_subchannel(schid, 1); - spin_lock_irq(&slow_subchannel_lock); + eval = idset_sch_contains(slow_subchannel_set, sch->schid); + idset_sch_del(slow_subchannel_set, sch->schid); + spin_unlock_irq(&slow_subchannel_lock); + if (eval) { + rc = css_evaluate_known_subchannel(sch, 1); + if (rc == -EAGAIN) + css_schedule_eval(sch->schid); } + return 0; +} + +static int slow_eval_unknown_fn(struct subchannel_id schid, void *data) +{ + int eval; + int rc = 0; + + spin_lock_irq(&slow_subchannel_lock); + eval = idset_sch_contains(slow_subchannel_set, schid); + idset_sch_del(slow_subchannel_set, schid); spin_unlock_irq(&slow_subchannel_lock); + if (eval) { + rc = css_evaluate_new_subchannel(schid, 1); + switch (rc) { + case -EAGAIN: + css_schedule_eval(schid); + rc = 0; + break; + case -ENXIO: + case -ENOMEM: + case -EIO: + /* These should abort looping */ + break; + default: + rc = 0; + } + } + return rc; +} + +static void css_slow_path_func(struct work_struct *unused) +{ + CIO_TRACE_EVENT(4, "slowpath"); + for_each_subchannel_staged(slow_eval_known_fn, slow_eval_unknown_fn, + NULL); } static DECLARE_WORK(slow_path_work, css_slow_path_func); @@ -430,7 +536,6 @@ void css_schedule_eval_all(void) /* Reprobe subchannel if unregistered. */ static int reprobe_subchannel(struct subchannel_id schid, void *data) { - struct subchannel *sch; int ret; CIO_MSG_EVENT(6, "cio: reprobe 0.%x.%04x\n", @@ -438,13 +543,6 @@ static int reprobe_subchannel(struct subchannel_id schid, void *data) if (need_reprobe) return -EAGAIN; - sch = get_subchannel_by_schid(schid); - if (sch) { - /* Already known. */ - put_device(&sch->dev); - return 0; - } - ret = css_probe_device(schid); switch (ret) { case 0: @@ -472,7 +570,7 @@ static void reprobe_all(struct work_struct *unused) /* Make sure initial subchannel scan is done. */ wait_event(ccw_device_init_wq, atomic_read(&ccw_device_init_count) == 0); - ret = for_each_subchannel(reprobe_subchannel, NULL); + ret = for_each_subchannel_staged(NULL, reprobe_subchannel, NULL); CIO_MSG_EVENT(2, "reprobe done (rc=%d, need_reprobe=%d)\n", ret, need_reprobe); @@ -787,8 +885,8 @@ int sch_is_pseudo_sch(struct subchannel *sch) static int css_bus_match (struct device *dev, struct device_driver *drv) { - struct subchannel *sch = container_of (dev, struct subchannel, dev); - struct css_driver *driver = container_of (drv, struct css_driver, drv); + struct subchannel *sch = to_subchannel(dev); + struct css_driver *driver = to_cssdriver(drv); if (sch->st == driver->subchannel_type) return 1; @@ -796,32 +894,36 @@ css_bus_match (struct device *dev, struct device_driver *drv) return 0; } -static int -css_probe (struct device *dev) +static int css_probe(struct device *dev) { struct subchannel *sch; + int ret; sch = to_subchannel(dev); - sch->driver = container_of (dev->driver, struct css_driver, drv); - return (sch->driver->probe ? sch->driver->probe(sch) : 0); + sch->driver = to_cssdriver(dev->driver); + ret = sch->driver->probe ? sch->driver->probe(sch) : 0; + if (ret) + sch->driver = NULL; + return ret; } -static int -css_remove (struct device *dev) +static int css_remove(struct device *dev) { struct subchannel *sch; + int ret; sch = to_subchannel(dev); - return (sch->driver->remove ? sch->driver->remove(sch) : 0); + ret = sch->driver->remove ? sch->driver->remove(sch) : 0; + sch->driver = NULL; + return ret; } -static void -css_shutdown (struct device *dev) +static void css_shutdown(struct device *dev) { struct subchannel *sch; sch = to_subchannel(dev); - if (sch->driver->shutdown) + if (sch->driver && sch->driver->shutdown) sch->driver->shutdown(sch); } @@ -833,6 +935,34 @@ struct bus_type css_bus_type = { .shutdown = css_shutdown, }; +/** + * css_driver_register - register a css driver + * @cdrv: css driver to register + * + * This is mainly a wrapper around driver_register that sets name + * and bus_type in the embedded struct device_driver correctly. + */ +int css_driver_register(struct css_driver *cdrv) +{ + cdrv->drv.name = cdrv->name; + cdrv->drv.bus = &css_bus_type; + cdrv->drv.owner = cdrv->owner; + return driver_register(&cdrv->drv); +} +EXPORT_SYMBOL_GPL(css_driver_register); + +/** + * css_driver_unregister - unregister a css driver + * @cdrv: css driver to unregister + * + * This is a wrapper around driver_unregister. + */ +void css_driver_unregister(struct css_driver *cdrv) +{ + driver_unregister(&cdrv->drv); +} +EXPORT_SYMBOL_GPL(css_driver_unregister); + subsys_initcall(init_channel_subsystem); MODULE_LICENSE("GPL"); diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 81215ef..b705545 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -58,64 +58,6 @@ struct pgid { __u32 tod_high; /* high word TOD clock */ } __attribute__ ((packed)); -#define MAX_CIWS 8 - -/* - * sense-id response buffer layout - */ -struct senseid { - /* common part */ - __u8 reserved; /* always 0x'FF' */ - __u16 cu_type; /* control unit type */ - __u8 cu_model; /* control unit model */ - __u16 dev_type; /* device type */ - __u8 dev_model; /* device model */ - __u8 unused; /* padding byte */ - /* extended part */ - struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ -} __attribute__ ((packed,aligned(4))); - -struct ccw_device_private { - struct ccw_device *cdev; - struct subchannel *sch; - int state; /* device state */ - atomic_t onoff; - unsigned long registered; - struct ccw_dev_id dev_id; /* device id */ - struct subchannel_id schid; /* subchannel number */ - __u8 imask; /* lpm mask for SNID/SID/SPGID */ - int iretry; /* retry counter SNID/SID/SPGID */ - struct { - unsigned int fast:1; /* post with "channel end" */ - unsigned int repall:1; /* report every interrupt status */ - unsigned int pgroup:1; /* do path grouping */ - unsigned int force:1; /* allow forced online */ - } __attribute__ ((packed)) options; - struct { - unsigned int pgid_single:1; /* use single path for Set PGID */ - unsigned int esid:1; /* Ext. SenseID supported by HW */ - unsigned int dosense:1; /* delayed SENSE required */ - unsigned int doverify:1; /* delayed path verification */ - unsigned int donotify:1; /* call notify function */ - unsigned int recog_done:1; /* dev. recog. complete */ - unsigned int fake_irb:1; /* deliver faked irb */ - unsigned int intretry:1; /* retry internal operation */ - } __attribute__((packed)) flags; - unsigned long intparm; /* user interruption parameter */ - struct qdio_irq *qdio_data; - struct irb irb; /* device status */ - struct senseid senseid; /* SenseID info */ - struct pgid pgid[8]; /* path group IDs per chpid*/ - struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ - struct work_struct kick_work; - wait_queue_head_t wait_q; - struct timer_list timer; - void *cmb; /* measurement information */ - struct list_head cmb_list; /* list of measured devices */ - u64 cmb_start_time; /* clock value of cmb reset */ - void *cmb_wait; /* deferred cmb enable/disable */ -}; - /* * A css driver handles all subchannels of one type. * Currently, we only care about I/O subchannels (type 0), these @@ -123,25 +65,35 @@ struct ccw_device_private { */ struct subchannel; struct css_driver { + struct module *owner; unsigned int subchannel_type; struct device_driver drv; - void (*irq)(struct device *); - int (*notify)(struct device *, int); - void (*verify)(struct device *); - void (*termination)(struct device *); + void (*irq)(struct subchannel *); + int (*notify)(struct subchannel *, int); + void (*verify)(struct subchannel *); + void (*termination)(struct subchannel *); int (*probe)(struct subchannel *); int (*remove)(struct subchannel *); void (*shutdown)(struct subchannel *); + const char *name; }; +#define to_cssdriver(n) container_of(n, struct css_driver, drv) + /* * all css_drivers have the css_bus_type */ extern struct bus_type css_bus_type; +extern int css_driver_register(struct css_driver *); +extern void css_driver_unregister(struct css_driver *); + extern void css_sch_device_unregister(struct subchannel *); extern struct subchannel * get_subchannel_by_schid(struct subchannel_id); extern int css_init_done; +int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *), + int (*fn_unknown)(struct subchannel_id, + void *), void *data); extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); extern void css_process_crw(int, int); extern void css_reiterate_subchannels(void); @@ -188,6 +140,8 @@ void css_schedule_eval(struct subchannel_id schid); void css_schedule_eval_all(void); int sch_is_pseudo_sch(struct subchannel *); +struct schib; +int css_sch_is_valid(struct schib *); extern struct workqueue_struct *slow_path_wq; diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 74f6b53..d35dc3f 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -17,6 +17,7 @@ #include <linux/list.h> #include <linux/device.h> #include <linux/workqueue.h> +#include <linux/timer.h> #include <asm/ccwdev.h> #include <asm/cio.h> @@ -28,6 +29,12 @@ #include "css.h" #include "device.h" #include "ioasm.h" +#include "io_sch.h" + +static struct timer_list recovery_timer; +static spinlock_t recovery_lock; +static int recovery_phase; +static const unsigned long recovery_delay[] = { 3, 30, 300 }; /******************* bus type handling ***********************/ @@ -115,19 +122,18 @@ static int ccw_uevent(struct device *dev, struct kobj_uevent_env *env) struct bus_type ccw_bus_type; -static int io_subchannel_probe (struct subchannel *); -static int io_subchannel_remove (struct subchannel *); -static int io_subchannel_notify(struct device *, int); -static void io_subchannel_verify(struct device *); -static void io_subchannel_ioterm(struct device *); +static void io_subchannel_irq(struct subchannel *); +static int io_subchannel_probe(struct subchannel *); +static int io_subchannel_remove(struct subchannel *); +static int io_subchannel_notify(struct subchannel *, int); +static void io_subchannel_verify(struct subchannel *); +static void io_subchannel_ioterm(struct subchannel *); static void io_subchannel_shutdown(struct subchannel *); static struct css_driver io_subchannel_driver = { + .owner = THIS_MODULE, .subchannel_type = SUBCHANNEL_TYPE_IO, - .drv = { - .name = "io_subchannel", - .bus = &css_bus_type, - }, + .name = "io_subchannel", .irq = io_subchannel_irq, .notify = io_subchannel_notify, .verify = io_subchannel_verify, @@ -142,6 +148,8 @@ struct workqueue_struct *ccw_device_notify_work; wait_queue_head_t ccw_device_init_wq; atomic_t ccw_device_init_count; +static void recovery_func(unsigned long data); + static int __init init_ccw_bus_type (void) { @@ -149,6 +157,7 @@ init_ccw_bus_type (void) init_waitqueue_head(&ccw_device_init_wq); atomic_set(&ccw_device_init_count, 0); + setup_timer(&recovery_timer, recovery_func, 0); ccw_device_work = create_singlethread_workqueue("cio"); if (!ccw_device_work) @@ -166,7 +175,8 @@ init_ccw_bus_type (void) if ((ret = bus_register (&ccw_bus_type))) goto out_err; - if ((ret = driver_register(&io_subchannel_driver.drv))) + ret = css_driver_register(&io_subchannel_driver); + if (ret) goto out_err; wait_event(ccw_device_init_wq, @@ -186,7 +196,7 @@ out_err: static void __exit cleanup_ccw_bus_type (void) { - driver_unregister(&io_subchannel_driver.drv); + css_driver_unregister(&io_subchannel_driver); bus_unregister(&ccw_bus_type); destroy_workqueue(ccw_device_notify_work); destroy_workqueue(ccw_device_work); @@ -773,7 +783,7 @@ static void sch_attach_device(struct subchannel *sch, { css_update_ssd_info(sch); spin_lock_irq(sch->lock); - sch->dev.driver_data = cdev; + sch_set_cdev(sch, cdev); cdev->private->schid = sch->schid; cdev->ccwlock = sch->lock; device_trigger_reprobe(sch); @@ -795,7 +805,7 @@ static void sch_attach_disconnected_device(struct subchannel *sch, put_device(&other_sch->dev); return; } - other_sch->dev.driver_data = NULL; + sch_set_cdev(other_sch, NULL); /* No need to keep a subchannel without ccw device around. */ css_sch_device_unregister(other_sch); put_device(&other_sch->dev); @@ -831,12 +841,12 @@ static void sch_create_and_recog_new_device(struct subchannel *sch) return; } spin_lock_irq(sch->lock); - sch->dev.driver_data = cdev; + sch_set_cdev(sch, cdev); spin_unlock_irq(sch->lock); /* Start recognition for the new ccw device. */ if (io_subchannel_recog(cdev, sch)) { spin_lock_irq(sch->lock); - sch->dev.driver_data = NULL; + sch_set_cdev(sch, NULL); spin_unlock_irq(sch->lock); if (cdev->dev.release) cdev->dev.release(&cdev->dev); @@ -940,7 +950,7 @@ io_subchannel_register(struct work_struct *work) cdev->private->dev_id.devno, ret); put_device(&cdev->dev); spin_lock_irqsave(sch->lock, flags); - sch->dev.driver_data = NULL; + sch_set_cdev(sch, NULL); spin_unlock_irqrestore(sch->lock, flags); kfree (cdev->private); kfree (cdev); @@ -1022,7 +1032,7 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch) int rc; struct ccw_device_private *priv; - sch->dev.driver_data = cdev; + sch_set_cdev(sch, cdev); sch->driver = &io_subchannel_driver; cdev->ccwlock = sch->lock; @@ -1082,7 +1092,7 @@ static void ccw_device_move_to_sch(struct work_struct *work) } if (former_parent) { spin_lock_irq(former_parent->lock); - former_parent->dev.driver_data = NULL; + sch_set_cdev(former_parent, NULL); spin_unlock_irq(former_parent->lock); css_sch_device_unregister(former_parent); /* Reset intparm to zeroes. */ @@ -1096,6 +1106,18 @@ out: put_device(&cdev->dev); } +static void io_subchannel_irq(struct subchannel *sch) +{ + struct ccw_device *cdev; + + cdev = sch_get_cdev(sch); + + CIO_TRACE_EVENT(3, "IRQ"); + CIO_TRACE_EVENT(3, sch->dev.bus_id); + if (cdev) + dev_fsm_event(cdev, DEV_EVENT_INTERRUPT); +} + static int io_subchannel_probe (struct subchannel *sch) { @@ -1104,13 +1126,13 @@ io_subchannel_probe (struct subchannel *sch) unsigned long flags; struct ccw_dev_id dev_id; - if (sch->dev.driver_data) { + cdev = sch_get_cdev(sch); + if (cdev) { /* * This subchannel already has an associated ccw_device. * Register it and exit. This happens for all early * device, e.g. the console. */ - cdev = sch->dev.driver_data; cdev->dev.groups = ccwdev_attr_groups; device_initialize(&cdev->dev); ccw_device_register(cdev); @@ -1132,6 +1154,11 @@ io_subchannel_probe (struct subchannel *sch) */ dev_id.devno = sch->schib.pmcw.dev; dev_id.ssid = sch->schid.ssid; + /* Allocate I/O subchannel private data. */ + sch->private = kzalloc(sizeof(struct io_subchannel_private), + GFP_KERNEL | GFP_DMA); + if (!sch->private) + return -ENOMEM; cdev = get_disc_ccwdev_by_dev_id(&dev_id, NULL); if (!cdev) cdev = get_orphaned_ccwdev_by_dev_id(to_css(sch->dev.parent), @@ -1149,16 +1176,18 @@ io_subchannel_probe (struct subchannel *sch) return 0; } cdev = io_subchannel_create_ccwdev(sch); - if (IS_ERR(cdev)) + if (IS_ERR(cdev)) { + kfree(sch->private); return PTR_ERR(cdev); - + } rc = io_subchannel_recog(cdev, sch); if (rc) { spin_lock_irqsave(sch->lock, flags); - sch->dev.driver_data = NULL; + sch_set_cdev(sch, NULL); spin_unlock_irqrestore(sch->lock, flags); if (cdev->dev.release) cdev->dev.release(&cdev->dev); + kfree(sch->private); } return rc; @@ -1170,25 +1199,25 @@ io_subchannel_remove (struct subchannel *sch) struct ccw_device *cdev; unsigned long flags; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return 0; - cdev = sch->dev.driver_data; /* Set ccw device to not operational and drop reference. */ spin_lock_irqsave(cdev->ccwlock, flags); - sch->dev.driver_data = NULL; + sch_set_cdev(sch, NULL); cdev->private->state = DEV_STATE_NOT_OPER; spin_unlock_irqrestore(cdev->ccwlock, flags); ccw_device_unregister(cdev); put_device(&cdev->dev); + kfree(sch->private); return 0; } -static int -io_subchannel_notify(struct device *dev, int event) +static int io_subchannel_notify(struct subchannel *sch, int event) { struct ccw_device *cdev; - cdev = dev->driver_data; + cdev = sch_get_cdev(sch); if (!cdev) return 0; if (!cdev->drv) @@ -1198,22 +1227,20 @@ io_subchannel_notify(struct device *dev, int event) return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0; } -static void -io_subchannel_verify(struct device *dev) +static void io_subchannel_verify(struct subchannel *sch) { struct ccw_device *cdev; - cdev = dev->driver_data; + cdev = sch_get_cdev(sch); if (cdev) dev_fsm_event(cdev, DEV_EVENT_VERIFY); } -static void -io_subchannel_ioterm(struct device *dev) +static void io_subchannel_ioterm(struct subchannel *sch) { struct ccw_device *cdev; - cdev = dev->driver_data; + cdev = sch_get_cdev(sch); if (!cdev) return; /* Internal I/O will be retried by the interrupt handler. */ @@ -1231,7 +1258,7 @@ io_subchannel_shutdown(struct subchannel *sch) struct ccw_device *cdev; int ret; - cdev = sch->dev.driver_data; + cdev = sch_get_cdev(sch); if (cio_is_console(sch->schid)) return; @@ -1271,6 +1298,9 @@ ccw_device_console_enable (struct ccw_device *cdev, struct subchannel *sch) { int rc; + /* Attach subchannel private data. */ + sch->private = cio_get_console_priv(); + memset(sch->private, 0, sizeof(struct io_subchannel_private)); /* Initialize the ccw_device structure. */ cdev->dev.parent= &sch->dev; rc = io_subchannel_recog(cdev, sch); @@ -1456,6 +1486,7 @@ int ccw_driver_register(struct ccw_driver *cdriver) drv->bus = &ccw_bus_type; drv->name = cdriver->name; + drv->owner = cdriver->owner; return driver_register(drv); } @@ -1481,6 +1512,60 @@ ccw_device_get_subchannel_id(struct ccw_device *cdev) return sch->schid; } +static int recovery_check(struct device *dev, void *data) +{ + struct ccw_device *cdev = to_ccwdev(dev); + int *redo = data; + + spin_lock_irq(cdev->ccwlock); + switch (cdev->private->state) { + case DEV_STATE_DISCONNECTED: + CIO_MSG_EVENT(3, "recovery: trigger 0.%x.%04x\n", + cdev->private->dev_id.ssid, + cdev->private->dev_id.devno); + dev_fsm_event(cdev, DEV_EVENT_VERIFY); + *redo = 1; + break; + case DEV_STATE_DISCONNECTED_SENSE_ID: + *redo = 1; + break; + } + spin_unlock_irq(cdev->ccwlock); + + return 0; +} + +static void recovery_func(unsigned long data) +{ + int redo = 0; + + bus_for_each_dev(&ccw_bus_type, NULL, &redo, recovery_check); + if (redo) { + spin_lock_irq(&recovery_lock); + if (!timer_pending(&recovery_timer)) { + if (recovery_phase < ARRAY_SIZE(recovery_delay) - 1) + recovery_phase++; + mod_timer(&recovery_timer, jiffies + + recovery_delay[recovery_phase] * HZ); + } + spin_unlock_irq(&recovery_lock); + } else + CIO_MSG_EVENT(2, "recovery: end\n"); +} + +void ccw_device_schedule_recovery(void) +{ + unsigned long flags; + + CIO_MSG_EVENT(2, "recovery: schedule\n"); + spin_lock_irqsave(&recovery_lock, flags); + if (!timer_pending(&recovery_timer) || (recovery_phase != 0)) { + recovery_phase = 0; + mod_timer(&recovery_timer, jiffies + recovery_delay[0] * HZ); + } + spin_unlock_irqrestore(&recovery_lock, flags); +} + MODULE_LICENSE("GPL"); EXPORT_SYMBOL(ccw_device_set_online); EXPORT_SYMBOL(ccw_device_set_offline); diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h index 0d40896..d40a2ff 100644 --- a/drivers/s390/cio/device.h +++ b/drivers/s390/cio/device.h @@ -5,6 +5,8 @@ #include <asm/atomic.h> #include <linux/wait.h> +#include "io_sch.h" + /* * states of the device statemachine */ @@ -74,7 +76,6 @@ extern struct workqueue_struct *ccw_device_notify_work; extern wait_queue_head_t ccw_device_init_wq; extern atomic_t ccw_device_init_count; -void io_subchannel_irq (struct device *pdev); void io_subchannel_recog_done(struct ccw_device *cdev); int ccw_device_cancel_halt_clear(struct ccw_device *); @@ -87,6 +88,8 @@ int ccw_device_recognition(struct ccw_device *); int ccw_device_online(struct ccw_device *); int ccw_device_offline(struct ccw_device *); +void ccw_device_schedule_recovery(void); + /* Function prototypes for device status and basic sense stuff. */ void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index bfad421..4b92c84 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -25,14 +25,16 @@ #include "ioasm.h" #include "chp.h" +static int timeout_log_enabled; + int device_is_online(struct subchannel *sch) { struct ccw_device *cdev; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return 0; - cdev = sch->dev.driver_data; return (cdev->private->state == DEV_STATE_ONLINE); } @@ -41,9 +43,9 @@ device_is_disconnected(struct subchannel *sch) { struct ccw_device *cdev; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return 0; - cdev = sch->dev.driver_data; return (cdev->private->state == DEV_STATE_DISCONNECTED || cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID); } @@ -53,19 +55,21 @@ device_set_disconnected(struct subchannel *sch) { struct ccw_device *cdev; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return; - cdev = sch->dev.driver_data; ccw_device_set_timeout(cdev, 0); cdev->private->flags.fake_irb = 0; cdev->private->state = DEV_STATE_DISCONNECTED; + if (cdev->online) + ccw_device_schedule_recovery(); } void device_set_intretry(struct subchannel *sch) { struct ccw_device *cdev; - cdev = sch->dev.driver_data; + cdev = sch_get_cdev(sch); if (!cdev) return; cdev->private->flags.intretry = 1; @@ -75,13 +79,62 @@ int device_trigger_verify(struct subchannel *sch) { struct ccw_device *cdev; - cdev = sch->dev.driver_data; + cdev = sch_get_cdev(sch); if (!cdev || !cdev->online) return -EINVAL; dev_fsm_event(cdev, DEV_EVENT_VERIFY); return 0; } +static int __init ccw_timeout_log_setup(char *unused) +{ + timeout_log_enabled = 1; + return 1; +} + +__setup("ccw_timeout_log", ccw_timeout_log_setup); + +static void ccw_timeout_log(struct ccw_device *cdev) +{ + struct schib schib; + struct subchannel *sch; + struct io_subchannel_private *private; + int cc; + + sch = to_subchannel(cdev->dev.parent); + private = to_io_private(sch); + cc = stsch(sch->schid, &schib); + + printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, " + "device information:\n", get_clock()); + printk(KERN_WARNING "cio: orb:\n"); + print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, + &private->orb, sizeof(private->orb), 0); + printk(KERN_WARNING "cio: ccw device bus id: %s\n", cdev->dev.bus_id); + printk(KERN_WARNING "cio: subchannel bus id: %s\n", sch->dev.bus_id); + printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, " + "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm); + + if ((void *)(addr_t)private->orb.cpa == &private->sense_ccw || + (void *)(addr_t)private->orb.cpa == cdev->private->iccws) + printk(KERN_WARNING "cio: last channel program (intern):\n"); + else + printk(KERN_WARNING "cio: last channel program:\n"); + + print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, + (void *)(addr_t)private->orb.cpa, + sizeof(struct ccw1), 0); + printk(KERN_WARNING "cio: ccw device state: %d\n", + cdev->private->state); + printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc); + printk(KERN_WARNING "cio: schib:\n"); + print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, + &schib, sizeof(schib), 0); + printk(KERN_WARNING "cio: ccw device flags:\n"); + print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, + &cdev->private->flags, sizeof(cdev->private->flags), 0); +} + /* * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. */ @@ -92,6 +145,8 @@ ccw_device_timeout(unsigned long data) cdev = (struct ccw_device *) data; spin_lock_irq(cdev->ccwlock); + if (timeout_log_enabled) + ccw_timeout_log(cdev); dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); spin_unlock_irq(cdev->ccwlock); } @@ -122,9 +177,9 @@ device_kill_pending_timer(struct subchannel *sch) { struct ccw_device *cdev; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return; - cdev = sch->dev.driver_data; ccw_device_set_timeout(cdev, 0); } @@ -268,7 +323,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state) switch (state) { case DEV_STATE_NOT_OPER: CIO_DEBUG(KERN_WARNING, 2, - "cio: SenseID : unknown device %04x on subchannel " + "SenseID : unknown device %04x on subchannel " "0.%x.%04x\n", cdev->private->dev_id.devno, sch->schid.ssid, sch->schid.sch_no); break; @@ -294,7 +349,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state) } /* Issue device info message. */ CIO_DEBUG(KERN_INFO, 2, - "cio: SenseID : device 0.%x.%04x reports: " + "SenseID : device 0.%x.%04x reports: " "CU Type/Mod = %04X/%02X, Dev Type/Mod = " "%04X/%02X\n", cdev->private->dev_id.ssid, @@ -304,7 +359,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state) break; case DEV_STATE_BOXED: CIO_DEBUG(KERN_WARNING, 2, - "cio: SenseID : boxed device %04x on subchannel " + "SenseID : boxed device %04x on subchannel " "0.%x.%04x\n", cdev->private->dev_id.devno, sch->schid.ssid, sch->schid.sch_no); break; @@ -349,7 +404,7 @@ ccw_device_oper_notify(struct work_struct *work) sch = to_subchannel(cdev->dev.parent); if (sch->driver && sch->driver->notify) { spin_unlock_irqrestore(cdev->ccwlock, flags); - ret = sch->driver->notify(&sch->dev, CIO_OPER); + ret = sch->driver->notify(sch, CIO_OPER); spin_lock_irqsave(cdev->ccwlock, flags); } else ret = 0; @@ -389,7 +444,7 @@ ccw_device_done(struct ccw_device *cdev, int state) if (state == DEV_STATE_BOXED) CIO_DEBUG(KERN_WARNING, 2, - "cio: Boxed device %04x on subchannel %04x\n", + "Boxed device %04x on subchannel %04x\n", cdev->private->dev_id.devno, sch->schid.sch_no); if (cdev->private->flags.donotify) { @@ -500,7 +555,8 @@ ccw_device_recognition(struct ccw_device *cdev) (cdev->private->state != DEV_STATE_BOXED)) return -EINVAL; sch = to_subchannel(cdev->dev.parent); - ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); + ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc, + (u32)(addr_t)sch); if (ret != 0) /* Couldn't enable the subchannel for i/o. Sick device. */ return ret; @@ -587,9 +643,10 @@ ccw_device_verify_done(struct ccw_device *cdev, int err) default: /* Reset oper notify indication after verify error. */ cdev->private->flags.donotify = 0; - if (cdev->online) + if (cdev->online) { + ccw_device_set_timeout(cdev, 0); dev_fsm_event(cdev, DEV_EVENT_NOTOPER); - else + } else ccw_device_done(cdev, DEV_STATE_NOT_OPER); break; } @@ -610,7 +667,8 @@ ccw_device_online(struct ccw_device *cdev) sch = to_subchannel(cdev->dev.parent); if (css_init_done && !get_device(&cdev->dev)) return -ENODEV; - ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); + ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc, + (u32)(addr_t)sch); if (ret != 0) { /* Couldn't enable the subchannel for i/o. Sick device. */ if (ret == -ENODEV) @@ -937,7 +995,7 @@ void device_kill_io(struct subchannel *sch) int ret; struct ccw_device *cdev; - cdev = sch->dev.driver_data; + cdev = sch_get_cdev(sch); ret = ccw_device_cancel_halt_clear(cdev); if (ret == -EBUSY) { ccw_device_set_timeout(cdev, 3*HZ); @@ -990,7 +1048,8 @@ ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) struct subchannel *sch; sch = to_subchannel(cdev->dev.parent); - if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 0) + if (cio_enable_subchannel(sch, sch->schib.pmcw.isc, + (u32)(addr_t)sch) != 0) /* Couldn't enable the subchannel for i/o. Sick device. */ return; @@ -1006,9 +1065,9 @@ device_trigger_reprobe(struct subchannel *sch) { struct ccw_device *cdev; - if (!sch->dev.driver_data) + cdev = sch_get_cdev(sch); + if (!cdev) return; - cdev = sch->dev.driver_data; if (cdev->private->state != DEV_STATE_DISCONNECTED) return; @@ -1028,7 +1087,7 @@ device_trigger_reprobe(struct subchannel *sch) sch->schib.pmcw.ena = 0; if ((sch->lpm & (sch->lpm - 1)) != 0) sch->schib.pmcw.mp = 1; - sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; + sch->schib.pmcw.intparm = (u32)(addr_t)sch; /* We should also udate ssd info, but this has to wait. */ /* Check if this is another device which appeared on the same sch. */ if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) { @@ -1223,21 +1282,4 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { }, }; -/* - * io_subchannel_irq is called for "real" interrupts or for status - * pending conditions on msch. - */ -void -io_subchannel_irq (struct device *pdev) -{ - struct ccw_device *cdev; - - cdev = to_subchannel(pdev)->dev.driver_data; - - CIO_TRACE_EVENT (3, "IRQ"); - CIO_TRACE_EVENT (3, pdev->bus_id); - if (cdev) - dev_fsm_event(cdev, DEV_EVENT_INTERRUPT); -} - EXPORT_SYMBOL_GPL(ccw_device_set_timeout); diff --git a/drivers/s390/cio/device_id.c b/drivers/s390/cio/device_id.c index 156f3f9..918b8b8 100644 --- a/drivers/s390/cio/device_id.c +++ b/drivers/s390/cio/device_id.c @@ -24,6 +24,7 @@ #include "css.h" #include "device.h" #include "ioasm.h" +#include "io_sch.h" /* * Input : @@ -219,11 +220,13 @@ ccw_device_check_sense_id(struct ccw_device *cdev) return -EAGAIN; } if (irb->scsw.cc == 3) { - if ((sch->orb.lpm & - sch->schib.pmcw.pim & sch->schib.pmcw.pam) != 0) + u8 lpm; + + lpm = to_io_private(sch)->orb.lpm; + if ((lpm & sch->schib.pmcw.pim & sch->schib.pmcw.pam) != 0) CIO_MSG_EVENT(2, "SenseID : path %02X for device %04x " "on subchannel 0.%x.%04x is " - "'not operational'\n", sch->orb.lpm, + "'not operational'\n", lpm, cdev->private->dev_id.devno, sch->schid.ssid, sch->schid.sch_no); return -EACCES; diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index 7fd2dad..49b58eb 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -501,7 +501,7 @@ ccw_device_stlck(struct ccw_device *cdev) return -ENOMEM; } spin_lock_irqsave(sch->lock, flags); - ret = cio_enable_subchannel(sch, 3); + ret = cio_enable_subchannel(sch, 3, (u32)(addr_t)sch); if (ret) goto out_unlock; /* diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index cb1879a..c52449a 100644 --- a/drivers/s390/cio/device_pgid.c +++ b/drivers/s390/cio/device_pgid.c @@ -22,6 +22,7 @@ #include "css.h" #include "device.h" #include "ioasm.h" +#include "io_sch.h" /* * Helper function called from interrupt context to decide whether an @@ -155,10 +156,13 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev) return -EAGAIN; } if (irb->scsw.cc == 3) { + u8 lpm; + + lpm = to_io_private(sch)->orb.lpm; CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x," " lpm %02X, became 'not operational'\n", cdev->private->dev_id.devno, sch->schid.ssid, - sch->schid.sch_no, sch->orb.lpm); + sch->schid.sch_no, lpm); return -EACCES; } i = 8 - ffs(cdev->private->imask); diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c index aa96e67..ebe0848 100644 --- a/drivers/s390/cio/device_status.c +++ b/drivers/s390/cio/device_status.c @@ -20,6 +20,7 @@ #include "css.h" #include "device.h" #include "ioasm.h" +#include "io_sch.h" /* * Check for any kind of channel or interface control check but don't @@ -310,6 +311,7 @@ int ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) { struct subchannel *sch; + struct ccw1 *sense_ccw; sch = to_subchannel(cdev->dev.parent); @@ -326,15 +328,16 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) /* * We have ending status but no sense information. Do a basic sense. */ - sch->sense_ccw.cmd_code = CCW_CMD_BASIC_SENSE; - sch->sense_ccw.cda = (__u32) __pa(cdev->private->irb.ecw); - sch->sense_ccw.count = SENSE_MAX_COUNT; - sch->sense_ccw.flags = CCW_FLAG_SLI; + sense_ccw = &to_io_private(sch)->sense_ccw; + sense_ccw->cmd_code = CCW_CMD_BASIC_SENSE; + sense_ccw->cda = (__u32) __pa(cdev->private->irb.ecw); + sense_ccw->count = SENSE_MAX_COUNT; + sense_ccw->flags = CCW_FLAG_SLI; /* Reset internal retry indication. */ cdev->private->flags.intretry = 0; - return cio_start (sch, &sch->sense_ccw, 0xff); + return cio_start(sch, sense_ccw, 0xff); } /* diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h new file mode 100644 index 0000000..8c61316 --- /dev/null +++ b/drivers/s390/cio/io_sch.h @@ -0,0 +1,163 @@ +#ifndef S390_IO_SCH_H +#define S390_IO_SCH_H + +#include "schid.h" + +/* + * operation request block + */ +struct orb { + u32 intparm; /* interruption parameter */ + u32 key : 4; /* flags, like key, suspend control, etc. */ + u32 spnd : 1; /* suspend control */ + u32 res1 : 1; /* reserved */ + u32 mod : 1; /* modification control */ + u32 sync : 1; /* synchronize control */ + u32 fmt : 1; /* format control */ + u32 pfch : 1; /* prefetch control */ + u32 isic : 1; /* initial-status-interruption control */ + u32 alcc : 1; /* address-limit-checking control */ + u32 ssic : 1; /* suppress-suspended-interr. control */ + u32 res2 : 1; /* reserved */ + u32 c64 : 1; /* IDAW/QDIO 64 bit control */ + u32 i2k : 1; /* IDAW 2/4kB block size control */ + u32 lpm : 8; /* logical path mask */ + u32 ils : 1; /* incorrect length */ + u32 zero : 6; /* reserved zeros */ + u32 orbx : 1; /* ORB extension control */ + u32 cpa; /* channel program address */ +} __attribute__ ((packed, aligned(4))); + +struct io_subchannel_private { + struct orb orb; /* operation request block */ + struct ccw1 sense_ccw; /* static ccw for sense command */ +} __attribute__ ((aligned(8))); + +#define to_io_private(n) ((struct io_subchannel_private *)n->private) +#define sch_get_cdev(n) (dev_get_drvdata(&n->dev)) +#define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c)) + +#define MAX_CIWS 8 + +/* + * sense-id response buffer layout + */ +struct senseid { + /* common part */ + u8 reserved; /* always 0x'FF' */ + u16 cu_type; /* control unit type */ + u8 cu_model; /* control unit model */ + u16 dev_type; /* device type */ + u8 dev_model; /* device model */ + u8 unused; /* padding byte */ + /* extended part */ + struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ +} __attribute__ ((packed, aligned(4))); + +struct ccw_device_private { + struct ccw_device *cdev; + struct subchannel *sch; + int state; /* device state */ + atomic_t onoff; + unsigned long registered; + struct ccw_dev_id dev_id; /* device id */ + struct subchannel_id schid; /* subchannel number */ + u8 imask; /* lpm mask for SNID/SID/SPGID */ + int iretry; /* retry counter SNID/SID/SPGID */ + struct { + unsigned int fast:1; /* post with "channel end" */ + unsigned int repall:1; /* report every interrupt status */ + unsigned int pgroup:1; /* do path grouping */ + unsigned int force:1; /* allow forced online */ + } __attribute__ ((packed)) options; + struct { + unsigned int pgid_single:1; /* use single path for Set PGID */ + unsigned int esid:1; /* Ext. SenseID supported by HW */ + unsigned int dosense:1; /* delayed SENSE required */ + unsigned int doverify:1; /* delayed path verification */ + unsigned int donotify:1; /* call notify function */ + unsigned int recog_done:1; /* dev. recog. complete */ + unsigned int fake_irb:1; /* deliver faked irb */ + unsigned int intretry:1; /* retry internal operation */ + } __attribute__((packed)) flags; + unsigned long intparm; /* user interruption parameter */ + struct qdio_irq *qdio_data; + struct irb irb; /* device status */ + struct senseid senseid; /* SenseID info */ + struct pgid pgid[8]; /* path group IDs per chpid*/ + struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ + struct work_struct kick_work; + wait_queue_head_t wait_q; + struct timer_list timer; + void *cmb; /* measurement information */ + struct list_head cmb_list; /* list of measured devices */ + u64 cmb_start_time; /* clock value of cmb reset */ + void *cmb_wait; /* deferred cmb enable/disable */ +}; + +static inline int ssch(struct subchannel_id schid, volatile struct orb *addr) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " ssch 0(%2)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc"); + return ccode; +} + +static inline int rsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " rsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +static inline int csch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " csch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +static inline int hsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " hsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +static inline int xsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " .insn rre,0xb2760000,%1,0\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + return ccode; +} + +#endif diff --git a/drivers/s390/cio/ioasm.h b/drivers/s390/cio/ioasm.h index 7153dd9..652ea36 100644 --- a/drivers/s390/cio/ioasm.h +++ b/drivers/s390/cio/ioasm.h @@ -109,72 +109,6 @@ static inline int tpi( volatile struct tpi_info *addr) return ccode; } -static inline int ssch(struct subchannel_id schid, - volatile struct orb *addr) -{ - register struct subchannel_id reg1 asm ("1") = schid; - int ccode; - - asm volatile( - " ssch 0(%2)\n" - " ipm %0\n" - " srl %0,28" - : "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc"); - return ccode; -} - -static inline int rsch(struct subchannel_id schid) -{ - register struct subchannel_id reg1 asm ("1") = schid; - int ccode; - - asm volatile( - " rsch\n" - " ipm %0\n" - " srl %0,28" - : "=d" (ccode) : "d" (reg1) : "cc"); - return ccode; -} - -static inline int csch(struct subchannel_id schid) -{ - register struct subchannel_id reg1 asm ("1") = schid; - int ccode; - - asm volatile( - " csch\n" - " ipm %0\n" - " srl %0,28" - : "=d" (ccode) : "d" (reg1) : "cc"); - return ccode; -} - -static inline int hsch(struct subchannel_id schid) -{ - register struct subchannel_id reg1 asm ("1") = schid; - int ccode; - - asm volatile( - " hsch\n" - " ipm %0\n" - " srl %0,28" - : "=d" (ccode) : "d" (reg1) : "cc"); - return ccode; -} - -static inline int xsch(struct subchannel_id schid) -{ - register struct subchannel_id reg1 asm ("1") = schid; - int ccode; - - asm volatile( - " .insn rre,0xb2760000,%1,0\n" - " ipm %0\n" - " srl %0,28" - : "=d" (ccode) : "d" (reg1) : "cc"); - return ccode; -} - static inline int chsc(void *chsc_area) { typedef struct { char _[4096]; } addr_type; diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c index 40a3208..e2a781b 100644 --- a/drivers/s390/cio/qdio.c +++ b/drivers/s390/cio/qdio.c @@ -48,11 +48,11 @@ #include <asm/debug.h> #include <asm/s390_rdev.h> #include <asm/qdio.h> +#include <asm/airq.h> #include "cio.h" #include "css.h" #include "device.h" -#include "airq.h" #include "qdio.h" #include "ioasm.h" #include "chsc.h" @@ -96,7 +96,7 @@ static debug_info_t *qdio_dbf_slsb_in; static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change during a while loop */ static DEFINE_SPINLOCK(ttiq_list_lock); -static int register_thinint_result; +static void *tiqdio_ind; static void tiqdio_tl(unsigned long); static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0); @@ -399,7 +399,7 @@ qdio_get_indicator(void) { int i; - for (i=1;i<INDICATORS_PER_CACHELINE;i++) + for (i = 0; i < INDICATORS_PER_CACHELINE; i++) if (!indicator_used[i]) { indicator_used[i]=1; return indicators+i; @@ -1408,8 +1408,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set) if (q->hydra_gives_outbound_pcis) { if (!q->siga_sync_done_on_thinints) { SYNC_MEMORY_ALL; - } else if ((!q->siga_sync_done_on_outb_tis)&& - (q->hydra_gives_outbound_pcis)) { + } else if (!q->siga_sync_done_on_outb_tis) { SYNC_MEMORY_ALL_OUTB; } } else { @@ -1911,8 +1910,7 @@ qdio_fill_thresholds(struct qdio_irq *irq_ptr, } } -static int -tiqdio_thinint_handler(void) +static void tiqdio_thinint_handler(void *ind, void *drv_data) { QDIO_DBF_TEXT4(0,trace,"thin_int"); @@ -1925,7 +1923,6 @@ tiqdio_thinint_handler(void) tiqdio_clear_global_summary(); tiqdio_inbound_checks(); - return 0; } static void @@ -2445,7 +2442,7 @@ tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero) real_addr_dev_st_chg_ind=0; } else { real_addr_local_summary_bit= - virt_to_phys((volatile void *)indicators); + virt_to_phys((volatile void *)tiqdio_ind); real_addr_dev_st_chg_ind= virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind); } @@ -3740,23 +3737,25 @@ static void tiqdio_register_thinints(void) { char dbf_text[20]; - register_thinint_result= - s390_register_adapter_interrupt(&tiqdio_thinint_handler); - if (register_thinint_result) { - sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff)); + + tiqdio_ind = + s390_register_adapter_interrupt(&tiqdio_thinint_handler, NULL); + if (IS_ERR(tiqdio_ind)) { + sprintf(dbf_text, "regthn%lx", PTR_ERR(tiqdio_ind)); QDIO_DBF_TEXT0(0,setup,dbf_text); QDIO_PRINT_ERR("failed to register adapter handler " \ - "(rc=%i).\nAdapter interrupts might " \ + "(rc=%li).\nAdapter interrupts might " \ "not work. Continuing.\n", - register_thinint_result); + PTR_ERR(tiqdio_ind)); + tiqdio_ind = NULL; } } static void tiqdio_unregister_thinints(void) { - if (!register_thinint_result) - s390_unregister_adapter_interrupt(&tiqdio_thinint_handler); + if (tiqdio_ind) + s390_unregister_adapter_interrupt(tiqdio_ind); } static int @@ -3768,8 +3767,8 @@ qdio_get_qdio_memory(void) for (i=1;i<INDICATORS_PER_CACHELINE;i++) indicator_used[i]=0; indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE), - GFP_KERNEL); - if (!indicators) + GFP_KERNEL); + if (!indicators) return -ENOMEM; return 0; } @@ -3780,7 +3779,6 @@ qdio_release_qdio_memory(void) kfree(indicators); } - static void qdio_unregister_dbf_views(void) { diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 6d7aad18..37870e4 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -57,7 +57,7 @@ of the queue to 0 */ #define QDIO_ESTABLISH_TIMEOUT (1*HZ) -#define QDIO_ACTIVATE_TIMEOUT ((5*HZ)>>10) +#define QDIO_ACTIVATE_TIMEOUT (5*HZ) #define QDIO_CLEANUP_CLEAR_TIMEOUT (20*HZ) #define QDIO_CLEANUP_HALT_TIMEOUT (10*HZ) #define QDIO_FORCE_CHECK_TIMEOUT (10*HZ) diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c index 3561982..c307621 100644 --- a/drivers/s390/net/claw.c +++ b/drivers/s390/net/claw.c @@ -2416,7 +2416,7 @@ init_ccw_bk(struct net_device *dev) privptr->p_buff_pages_perwrite); #endif if (p_buff==NULL) { - printk(KERN_INFO "%s:%s __get_free_pages" + printk(KERN_INFO "%s:%s __get_free_pages " "for writes buf failed : get is for %d pages\n", dev->name, __FUNCTION__, diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c index 0fd663b..7bfe8d7 100644 --- a/drivers/s390/net/lcs.c +++ b/drivers/s390/net/lcs.c @@ -1115,7 +1115,7 @@ list_modified: rc = lcs_send_setipm(card, ipm); spin_lock_irqsave(&card->ipm_lock, flags); if (rc) { - PRINT_INFO("Adding multicast address failed." + PRINT_INFO("Adding multicast address failed. " "Table possibly full!\n"); /* store ipm in failed list -> will be added * to ipm_list again, so a retry will be done diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c index c7ea938..f3d893c 100644 --- a/drivers/s390/net/netiucv.c +++ b/drivers/s390/net/netiucv.c @@ -198,8 +198,7 @@ struct iucv_connection { /** * Linked list of all connection structs. */ -static struct list_head iucv_connection_list = - LIST_HEAD_INIT(iucv_connection_list); +static LIST_HEAD(iucv_connection_list); static DEFINE_RWLOCK(iucv_connection_rwlock); /** @@ -2089,6 +2088,11 @@ static struct attribute_group netiucv_drv_attr_group = { .attrs = netiucv_drv_attrs, }; +static struct attribute_group *netiucv_drv_attr_groups[] = { + &netiucv_drv_attr_group, + NULL, +}; + static void netiucv_banner(void) { PRINT_INFO("NETIUCV driver initialized\n"); @@ -2113,7 +2117,6 @@ static void __exit netiucv_exit(void) netiucv_unregister_device(dev); } - sysfs_remove_group(&netiucv_driver.kobj, &netiucv_drv_attr_group); driver_unregister(&netiucv_driver); iucv_unregister(&netiucv_handler, 1); iucv_unregister_dbf_views(); @@ -2133,6 +2136,7 @@ static int __init netiucv_init(void) if (rc) goto out_dbf; IUCV_DBF_TEXT(trace, 3, __FUNCTION__); + netiucv_driver.groups = netiucv_drv_attr_groups; rc = driver_register(&netiucv_driver); if (rc) { PRINT_ERR("NETIUCV: failed to register driver.\n"); @@ -2140,18 +2144,9 @@ static int __init netiucv_init(void) goto out_iucv; } - rc = sysfs_create_group(&netiucv_driver.kobj, &netiucv_drv_attr_group); - if (rc) { - PRINT_ERR("NETIUCV: failed to add driver attributes.\n"); - IUCV_DBF_TEXT_(setup, 2, - "ret %d - netiucv_drv_attr_group\n", rc); - goto out_driver; - } netiucv_banner(); return rc; -out_driver: - driver_unregister(&netiucv_driver); out_iucv: iucv_unregister(&netiucv_handler, 1); out_dbf: diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c index ff999ff..62606ce 100644 --- a/drivers/s390/net/qeth_main.c +++ b/drivers/s390/net/qeth_main.c @@ -3890,7 +3890,7 @@ qeth_verify_vlan_dev(struct net_device *dev, struct qeth_card *card) break; } } - if (rc && !(VLAN_DEV_INFO(dev)->real_dev->priv == (void *)card)) + if (rc && !(vlan_dev_info(dev)->real_dev->priv == (void *)card)) return 0; #endif @@ -3930,7 +3930,7 @@ qeth_get_card_from_dev(struct net_device *dev) card = (struct qeth_card *)dev->priv; else if (rc == QETH_VLAN_CARD) card = (struct qeth_card *) - VLAN_DEV_INFO(dev)->real_dev->priv; + vlan_dev_info(dev)->real_dev->priv; QETH_DBF_TEXT_(trace, 4, "%d", rc); return card ; @@ -8340,7 +8340,7 @@ qeth_arp_constructor(struct neighbour *neigh) neigh->parms = neigh_parms_clone(parms); rcu_read_unlock(); - neigh->type = inet_addr_type(*(__be32 *) neigh->primary_key); + neigh->type = inet_addr_type(&init_net, *(__be32 *) neigh->primary_key); neigh->nud_state = NUD_NOARP; neigh->ops = arp_direct_ops; neigh->output = neigh->ops->queue_xmit; diff --git a/drivers/s390/net/qeth_proc.c b/drivers/s390/net/qeth_proc.c index f1ff165..46ecd03 100644 --- a/drivers/s390/net/qeth_proc.c +++ b/drivers/s390/net/qeth_proc.c @@ -146,7 +146,7 @@ qeth_procfile_seq_show(struct seq_file *s, void *it) return 0; } -static struct seq_operations qeth_procfile_seq_ops = { +static const struct seq_operations qeth_procfile_seq_ops = { .start = qeth_procfile_seq_start, .stop = qeth_procfile_seq_stop, .next = qeth_procfile_seq_next, @@ -264,7 +264,7 @@ qeth_perf_procfile_seq_show(struct seq_file *s, void *it) return 0; } -static struct seq_operations qeth_perf_procfile_seq_ops = { +static const struct seq_operations qeth_perf_procfile_seq_ops = { .start = qeth_procfile_seq_start, .stop = qeth_procfile_seq_stop, .next = qeth_procfile_seq_next, diff --git a/drivers/s390/net/smsgiucv.c b/drivers/s390/net/smsgiucv.c index 47bb47b..8735a41 100644 --- a/drivers/s390/net/smsgiucv.c +++ b/drivers/s390/net/smsgiucv.c @@ -42,7 +42,7 @@ MODULE_DESCRIPTION ("Linux for S/390 IUCV special message driver"); static struct iucv_path *smsg_path; static DEFINE_SPINLOCK(smsg_list_lock); -static struct list_head smsg_list = LIST_HEAD_INIT(smsg_list); +static LIST_HEAD(smsg_list); static int smsg_path_pending(struct iucv_path *, u8 ipvmid[8], u8 ipuser[16]); static void smsg_message_pending(struct iucv_path *, struct iucv_message *); diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 0011849..874b55e 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -844,8 +844,6 @@ zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) unit->sysfs_device.release = zfcp_sysfs_unit_release; dev_set_drvdata(&unit->sysfs_device, unit); - init_waitqueue_head(&unit->scsi_scan_wq); - /* mark unit unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index e01cbf1..edc5015 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -52,6 +52,9 @@ static struct ccw_driver zfcp_ccw_driver = { .set_offline = zfcp_ccw_set_offline, .notify = zfcp_ccw_notify, .shutdown = zfcp_ccw_shutdown, + .driver = { + .groups = zfcp_driver_attr_groups, + }, }; MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); @@ -120,6 +123,9 @@ zfcp_ccw_remove(struct ccw_device *ccw_device) list_for_each_entry_safe(port, p, &adapter->port_remove_lh, list) { list_for_each_entry_safe(unit, u, &port->unit_remove_lh, list) { + if (atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED, + &unit->status)) + scsi_remove_device(unit->device); zfcp_unit_dequeue(unit); } zfcp_port_dequeue(port); @@ -251,16 +257,7 @@ zfcp_ccw_notify(struct ccw_device *ccw_device, int event) int __init zfcp_ccw_register(void) { - int retval; - - retval = ccw_driver_register(&zfcp_ccw_driver); - if (retval) - goto out; - retval = zfcp_sysfs_driver_create_files(&zfcp_ccw_driver.driver); - if (retval) - ccw_driver_unregister(&zfcp_ccw_driver); - out: - return retval; + return ccw_driver_register(&zfcp_ccw_driver); } /** diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index ffa3bf7..701046c 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -161,12 +161,6 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req) (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) { strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE); level = 4; - } else if ((prot_status_qual->doubleword[0] != 0) || - (prot_status_qual->doubleword[1] != 0) || - (fsf_status_qual->doubleword[0] != 0) || - (fsf_status_qual->doubleword[1] != 0)) { - strncpy(rec->tag2, "qual", ZFCP_DBF_TAG_SIZE); - level = 3; } else { strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE); level = 6; diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index e268f79..9e9f6c1 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -118,7 +118,7 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) #define ZFCP_SBAL_TIMEOUT (5*HZ) -#define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) +#define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */ /* queue polling (values in microseconds) */ #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ @@ -139,7 +139,7 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM /* Do 1st retry in 1 second, then double the timeout for each following retry */ -#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100 +#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 /* timeout value for "default timer" for fsf requests */ @@ -983,10 +983,6 @@ struct zfcp_unit { struct scsi_device *device; /* scsi device struct pointer */ struct zfcp_erp_action erp_action; /* pending error recovery */ atomic_t erp_counter; - wait_queue_head_t scsi_scan_wq; /* can be used to wait until - all scsi_scan_target - requests have been - completed. */ }; /* FSF request */ @@ -1127,6 +1123,20 @@ zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id) return NULL; } +static inline struct zfcp_fsf_req * +zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req) +{ + struct zfcp_fsf_req *request; + unsigned int idx; + + for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) { + list_for_each_entry(request, &adapter->req_list[idx], list) + if (request == req) + return request; + } + return NULL; +} + /* * functions needed for reference/usage counting */ diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 07fa824..2dc8110 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -131,7 +131,7 @@ static void zfcp_close_qdio(struct zfcp_adapter *adapter) debug_text_event(adapter->erp_dbf, 3, "qdio_down2a"); while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - msleep(1000); + ssleep(1); debug_text_event(adapter->erp_dbf, 3, "qdio_down2b"); /* cleanup used outbound sbals */ @@ -456,7 +456,7 @@ zfcp_test_link(struct zfcp_port *port) zfcp_port_get(port); retval = zfcp_erp_adisc(port); - if (retval != 0) { + if (retval != 0 && retval != -EBUSY) { zfcp_port_put(port); ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " "on adapter %s\n ", port->wwpn, @@ -846,7 +846,8 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) if (erp_action->fsf_req) { /* take lock to ensure that request is not deleted meanwhile */ spin_lock(&adapter->req_list_lock); - if (zfcp_reqlist_find(adapter, erp_action->fsf_req->req_id)) { + if (zfcp_reqlist_find_safe(adapter, erp_action->fsf_req) && + erp_action->fsf_req->erp_action == erp_action) { /* fsf_req still exists */ debug_text_event(adapter->erp_dbf, 3, "a_ca_req"); debug_event(adapter->erp_dbf, 3, &erp_action->fsf_req, @@ -1285,7 +1286,7 @@ zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) * note: no lock in subsequent strategy routines * (this allows these routine to call schedule, e.g. * kmalloc with such flags or qdio_initialize & friends) - * Note: in case of timeout, the seperate strategies will fail + * Note: in case of timeout, the separate strategies will fail * anyhow. No need for a special action. Even worse, a nameserver * failure would not wake up waiting ports without the call. */ @@ -1609,7 +1610,6 @@ static void zfcp_erp_scsi_scan(struct work_struct *work) scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, unit->scsi_lun, 0); atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); - wake_up(&unit->scsi_scan_wq); zfcp_unit_put(unit); kfree(p); } @@ -1900,7 +1900,7 @@ zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) ZFCP_LOG_INFO("Waiting to allow the adapter %s " "to recover itself\n", zfcp_get_busid_by_adapter(adapter)); - msleep(jiffies_to_msecs(ZFCP_TYPE2_RECOVERY_TIME)); + ssleep(ZFCP_TYPE2_RECOVERY_TIME); } return retval; @@ -2080,7 +2080,7 @@ zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) debug_text_event(adapter->erp_dbf, 3, "qdio_down1a"); while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - msleep(1000); + ssleep(1); debug_text_event(adapter->erp_dbf, 3, "qdio_down1b"); failed_qdio_establish: @@ -2165,7 +2165,7 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) ZFCP_LOG_DEBUG("host connection still initialising... " "waiting and retrying...\n"); /* sleep a little bit before retry */ - msleep(jiffies_to_msecs(sleep)); + ssleep(sleep); sleep *= 2; } diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 8534cf0..06b1079 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -27,8 +27,7 @@ extern struct zfcp_data zfcp_data; /******************************** SYSFS *************************************/ -extern int zfcp_sysfs_driver_create_files(struct device_driver *); -extern void zfcp_sysfs_driver_remove_files(struct device_driver *); +extern struct attribute_group *zfcp_driver_attr_groups[]; extern int zfcp_sysfs_adapter_create_files(struct device *); extern void zfcp_sysfs_adapter_remove_files(struct device *); extern int zfcp_sysfs_port_create_files(struct device *, u32); diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index ff866eb..0dff058 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -502,7 +502,7 @@ zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; case FSF_SQ_NO_RECOM: - ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" + ZFCP_LOG_NORMAL("bug: No recommendation could be given for a " "problem on the adapter %s " "Stopping all operations on this adapter. ", zfcp_get_busid_by_adapter(fsf_req->adapter)); @@ -813,7 +813,7 @@ zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) read_unlock_irqrestore(&zfcp_data.config_lock, flags); if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { - ZFCP_LOG_NORMAL("bug: Reopen port indication received for" + ZFCP_LOG_NORMAL("bug: Reopen port indication received for " "nonexisting port with d_id 0x%06x on " "adapter %s. Ignored.\n", status_buffer->d_id & ZFCP_DID_MASK, @@ -1116,6 +1116,10 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, goto out; } + if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &unit->status))) + goto unit_blocked; + sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -1131,22 +1135,13 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Failed to send abort command request " - "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); + if (!retval) + goto out; + + unit_blocked: zfcp_fsf_req_free(fsf_req); fsf_req = NULL; - goto out; - } - ZFCP_LOG_DEBUG("Abort FCP Command request initiated " - "(adapter%s, port d_id=0x%06x, " - "unit x%016Lx, old_req_id=0x%lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->d_id, - unit->fcp_lun, old_req_id); out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return fsf_req; @@ -1164,8 +1159,8 @@ zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) { int retval = -EINVAL; struct zfcp_unit *unit; - unsigned char status_qual = - new_fsf_req->qtcb->header.fsf_status_qual.word[0]; + union fsf_status_qual *fsf_stat_qual = + &new_fsf_req->qtcb->header.fsf_status_qual; if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ @@ -1178,7 +1173,7 @@ zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) switch (new_fsf_req->qtcb->header.fsf_status) { case FSF_PORT_HANDLE_NOT_VALID: - if (status_qual >> 4 != status_qual % 0xf) { + if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { debug_text_event(new_fsf_req->adapter->erp_dbf, 3, "fsf_s_phand_nv0"); /* @@ -1207,8 +1202,7 @@ zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) break; case FSF_LUN_HANDLE_NOT_VALID: - if (status_qual >> 4 != status_qual % 0xf) { - /* 2 */ + if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { debug_text_event(new_fsf_req->adapter->erp_dbf, 3, "fsf_s_lhand_nv0"); /* @@ -1674,6 +1668,12 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) goto failed_req; } + if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &els->port->status))) { + ret = -EBUSY; + goto port_blocked; + } + sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); if (zfcp_use_one_sbal(els->req, els->req_count, els->resp, els->resp_count)){ @@ -1755,6 +1755,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) "0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id); goto out; + port_blocked: failed_send: zfcp_fsf_req_free(fsf_req); @@ -2280,7 +2281,7 @@ zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) &lock_flags, &fsf_req); if (retval) { ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for" + "exchange port data request for " "the adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); write_unlock_irqrestore(&adapter->request_queue.queue_lock, @@ -2339,7 +2340,7 @@ zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, 0, NULL, &lock_flags, &fsf_req); if (retval) { ZFCP_LOG_INFO("error: Out of resources. Could not create an " - "exchange port data request for" + "exchange port data request for " "the adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); write_unlock_irqrestore(&adapter->request_queue.queue_lock, @@ -3592,6 +3593,12 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, goto failed_req_create; } + if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &unit->status))) { + retval = -EBUSY; + goto unit_blocked; + } + zfcp_unit_get(unit); fsf_req->unit = unit; @@ -3732,6 +3739,7 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, send_failed: no_fit: failed_scsi_cmnd: + unit_blocked: zfcp_unit_put(unit); zfcp_fsf_req_free(fsf_req); fsf_req = NULL; @@ -3766,6 +3774,10 @@ zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, goto out; } + if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &unit->status))) + goto unit_blocked; + /* * Used to decide on proper handler in the return path, * could be either zfcp_fsf_send_fcp_command_task_handler or @@ -3799,25 +3811,13 @@ zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Could not send an FCP-command (task " - "management) on adapter %s, port 0x%016Lx for " - "unit LUN 0x%016Lx\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun); - zfcp_fsf_req_free(fsf_req); - fsf_req = NULL; + if (!retval) goto out; - } - ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " - "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " - "tm_flags=0x%x)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, - unit->fcp_lun, - tm_flags); + unit_blocked: + zfcp_fsf_req_free(fsf_req); + fsf_req = NULL; + out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return fsf_req; @@ -4224,10 +4224,10 @@ zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", fcp_rsp_iu->fcp_sns_len); - memcpy(&scpnt->sense_buffer, + memcpy(scpnt->sense_buffer, zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, - (void *) &scpnt->sense_buffer, sns_len); + (void *)scpnt->sense_buffer, sns_len); } /* check for overrun */ @@ -4725,7 +4725,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, /* allocate new FSF request */ fsf_req = zfcp_fsf_req_alloc(pool, req_flags); if (unlikely(NULL == fsf_req)) { - ZFCP_LOG_DEBUG("error: Could not put an FSF request into" + ZFCP_LOG_DEBUG("error: Could not put an FSF request into " "the outbound (send) queue.\n"); ret = -ENOMEM; goto failed_fsf_req; diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 51d92b1..22fdc17 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -529,7 +529,7 @@ zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *fsf_req) /** - * zfcp_qdio_sbale_fill - set address and lenght in current SBALE + * zfcp_qdio_sbale_fill - set address and length in current SBALE * on request_queue */ static void diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index abae202..b9daf5c 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -51,7 +51,6 @@ struct zfcp_data zfcp_data = { .queuecommand = zfcp_scsi_queuecommand, .eh_abort_handler = zfcp_scsi_eh_abort_handler, .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, - .eh_bus_reset_handler = zfcp_scsi_eh_host_reset_handler, .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, .can_queue = 4096, .this_id = -1, @@ -181,9 +180,6 @@ static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) if (unit) { zfcp_erp_wait(unit->port->adapter); - wait_event(unit->scsi_scan_wq, - atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, - &unit->status) == 0); atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); sdpnt->hostdata = NULL; unit->device = NULL; @@ -262,8 +258,9 @@ zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, goto out; } - if (unlikely( - !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))) { + tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, + ZFCP_REQ_AUTO_CLEANUP); + if (unlikely(tmp == -EBUSY)) { ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx " "on port 0x%016Lx in recovery\n", zfcp_get_busid_by_unit(unit), @@ -272,9 +269,6 @@ zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, goto out; } - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, - ZFCP_REQ_AUTO_CLEANUP); - if (unlikely(tmp < 0)) { ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n"); retval = SCSI_MLQUEUE_HOST_BUSY; @@ -459,7 +453,9 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) retval = SUCCESS; goto out; } - ZFCP_LOG_NORMAL("resetting unit 0x%016Lx\n", unit->fcp_lun); + ZFCP_LOG_NORMAL("resetting unit 0x%016Lx on port 0x%016Lx, adapter %s\n", + unit->fcp_lun, unit->port->wwpn, + zfcp_get_busid_by_adapter(unit->port->adapter)); /* * If we do not know whether the unit supports 'logical unit reset' @@ -542,7 +538,7 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, } /** - * zfcp_scsi_eh_host_reset_handler - handler for host and bus reset + * zfcp_scsi_eh_host_reset_handler - handler for host reset */ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { @@ -552,8 +548,10 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) unit = (struct zfcp_unit*) scpnt->device->hostdata; adapter = unit->port->adapter; - ZFCP_LOG_NORMAL("host/bus reset because of problems with " - "unit 0x%016Lx\n", unit->fcp_lun); + ZFCP_LOG_NORMAL("host reset because of problems with " + "unit 0x%016Lx on port 0x%016Lx, adapter %s\n", + unit->fcp_lun, unit->port->wwpn, + zfcp_get_busid_by_adapter(unit->port->adapter)); zfcp_erp_adapter_reopen(adapter, 0); zfcp_erp_wait(adapter); diff --git a/drivers/s390/scsi/zfcp_sysfs_driver.c b/drivers/s390/scsi/zfcp_sysfs_driver.c index 005e62f..651edd5 100644 --- a/drivers/s390/scsi/zfcp_sysfs_driver.c +++ b/drivers/s390/scsi/zfcp_sysfs_driver.c @@ -98,28 +98,9 @@ static struct attribute_group zfcp_driver_attr_group = { .attrs = zfcp_driver_attrs, }; -/** - * zfcp_sysfs_create_driver_files - create sysfs driver files - * @dev: pointer to belonging device - * - * Create all sysfs attributes of the zfcp device driver - */ -int -zfcp_sysfs_driver_create_files(struct device_driver *drv) -{ - return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group); -} - -/** - * zfcp_sysfs_remove_driver_files - remove sysfs driver files - * @dev: pointer to belonging device - * - * Remove all sysfs attributes of the zfcp device driver - */ -void -zfcp_sysfs_driver_remove_files(struct device_driver *drv) -{ - sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group); -} +struct attribute_group *zfcp_driver_attr_groups[] = { + &zfcp_driver_attr_group, + NULL, +}; #undef ZFCP_LOG_AREA |
