diff options
Diffstat (limited to 'sys/cam/ctl/scsi_ctl.c')
| -rw-r--r-- | sys/cam/ctl/scsi_ctl.c | 2049 |
1 files changed, 2049 insertions, 0 deletions
diff --git a/sys/cam/ctl/scsi_ctl.c b/sys/cam/ctl/scsi_ctl.c new file mode 100644 index 0000000..1d547d5 --- /dev/null +++ b/sys/cam/ctl/scsi_ctl.c @@ -0,0 +1,2049 @@ +/*- + * Copyright (c) 2008, 2009 Silicon Graphics International Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + * + * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/scsi_ctl.c#4 $ + */ +/* + * Peripheral driver interface between CAM and CTL (CAM Target Layer). + * + * Author: Ken Merry <ken@FreeBSD.org> + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/queue.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/condvar.h> +#include <sys/malloc.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/sbuf.h> +#include <sys/sysctl.h> +#include <sys/types.h> +#include <sys/systm.h> +#include <machine/bus.h> + +#include <cam/cam.h> +#include <cam/cam_ccb.h> +#include <cam/cam_periph.h> +#include <cam/cam_queue.h> +#include <cam/cam_xpt_periph.h> +#include <cam/cam_debug.h> +#include <cam/cam_sim.h> +#include <cam/cam_xpt.h> + +#include <cam/scsi/scsi_all.h> +#include <cam/scsi/scsi_message.h> + +#include <cam/ctl/ctl_io.h> +#include <cam/ctl/ctl.h> +#include <cam/ctl/ctl_frontend.h> +#include <cam/ctl/ctl_util.h> +#include <cam/ctl/ctl_error.h> + +typedef enum { + CTLFE_CCB_WAITING = 0x01 +} ctlfe_ccb_types; + +struct ctlfe_softc { + struct ctl_frontend fe; + path_id_t path_id; + struct cam_sim *sim; + char port_name[DEV_IDLEN]; + STAILQ_HEAD(, ctlfe_lun_softc) lun_softc_list; + STAILQ_ENTRY(ctlfe_softc) links; +}; + +STAILQ_HEAD(, ctlfe_softc) ctlfe_softc_list; +struct mtx ctlfe_list_mtx; +static char ctlfe_mtx_desc[] = "ctlfelist"; +static int ctlfe_dma_enabled = 1; +#ifdef CTLFE_INIT_ENABLE +static int ctlfe_max_targets = 1; +static int ctlfe_num_targets = 0; +#endif + +typedef enum { + CTLFE_LUN_NONE = 0x00, + CTLFE_LUN_WILDCARD = 0x01 +} ctlfe_lun_flags; + +struct ctlfe_lun_softc { + struct ctlfe_softc *parent_softc; + struct cam_periph *periph; + ctlfe_lun_flags flags; + struct callout dma_callout; + uint64_t ccbs_alloced; + uint64_t ccbs_freed; + uint64_t ctios_sent; + uint64_t ctios_returned; + uint64_t atios_sent; + uint64_t atios_returned; + uint64_t inots_sent; + uint64_t inots_returned; + /* bus_dma_tag_t dma_tag; */ + TAILQ_HEAD(, ccb_hdr) work_queue; + STAILQ_ENTRY(ctlfe_lun_softc) links; +}; + +typedef enum { + CTLFE_CMD_NONE = 0x00, + CTLFE_CMD_PIECEWISE = 0x01 +} ctlfe_cmd_flags; + +/* + * The size limit of this structure is CTL_PORT_PRIV_SIZE, from ctl_io.h. + * Currently that is 600 bytes. + */ +struct ctlfe_lun_cmd_info { + int cur_transfer_index; + ctlfe_cmd_flags flags; + /* + * XXX KDM struct bus_dma_segment is 8 bytes on i386, and 16 + * bytes on amd64. So with 32 elements, this is 256 bytes on + * i386 and 512 bytes on amd64. + */ + bus_dma_segment_t cam_sglist[32]; +}; + +/* + * When we register the adapter/bus, request that this many ctl_ios be + * allocated. This should be the maximum supported by the adapter, but we + * currently don't have a way to get that back from the path inquiry. + * XXX KDM add that to the path inquiry. + */ +#define CTLFE_REQ_CTL_IO 4096 +/* + * Number of Accept Target I/O CCBs to allocate and queue down to the + * adapter per LUN. + * XXX KDM should this be controlled by CTL? + */ +#define CTLFE_ATIO_PER_LUN 1024 +/* + * Number of Immediate Notify CCBs (used for aborts, resets, etc.) to + * allocate and queue down to the adapter per LUN. + * XXX KDM should this be controlled by CTL? + */ +#define CTLFE_IN_PER_LUN 1024 + +/* + * Timeout (in seconds) on CTIO CCB allocation for doing a DMA or sending + * status to the initiator. The SIM is expected to have its own timeouts, + * so we're not putting this timeout around the CCB execution time. The + * SIM should timeout and let us know if it has an issue. + */ +#define CTLFE_DMA_TIMEOUT 60 + +/* + * Turn this on to enable extra debugging prints. + */ +#if 0 +#define CTLFE_DEBUG +#endif + +/* + * Use randomly assigned WWNN/WWPN values. This is to work around an issue + * in the FreeBSD initiator that makes it unable to rescan the target if + * the target gets rebooted and the WWNN/WWPN stay the same. + */ +#if 0 +#define RANDOM_WWNN +#endif + +SYSCTL_INT(_kern_cam_ctl, OID_AUTO, dma_enabled, CTLFLAG_RW, + &ctlfe_dma_enabled, 0, "DMA enabled"); +MALLOC_DEFINE(M_CTLFE, "CAM CTL FE", "CAM CTL FE interface"); + +#define ccb_type ppriv_field0 +/* This is only used in the ATIO */ +#define io_ptr ppriv_ptr1 + +/* This is only used in the CTIO */ +#define ccb_atio ppriv_ptr1 + +int ctlfeinitialize(void); +void ctlfeshutdown(void); +static periph_init_t ctlfeinit; +static void ctlfeasync(void *callback_arg, uint32_t code, + struct cam_path *path, void *arg); +static periph_ctor_t ctlferegister; +static periph_oninv_t ctlfeoninvalidate; +static periph_dtor_t ctlfecleanup; +static periph_start_t ctlfestart; +static void ctlfedone(struct cam_periph *periph, + union ccb *done_ccb); + +static void ctlfe_onoffline(void *arg, int online); +static void ctlfe_online(void *arg); +static void ctlfe_offline(void *arg); +static int ctlfe_targ_enable(void *arg, struct ctl_id targ_id); +static int ctlfe_targ_disable(void *arg, struct ctl_id targ_id); +static int ctlfe_lun_enable(void *arg, struct ctl_id targ_id, + int lun_id); +static int ctlfe_lun_disable(void *arg, struct ctl_id targ_id, + int lun_id); +static void ctlfe_dump_sim(struct cam_sim *sim); +static void ctlfe_dump_queue(struct ctlfe_lun_softc *softc); +static void ctlfe_dma_timeout(void *arg); +static void ctlfe_datamove_done(union ctl_io *io); +static void ctlfe_dump(void); + +static struct periph_driver ctlfe_driver = +{ + ctlfeinit, "ctl", + TAILQ_HEAD_INITIALIZER(ctlfe_driver.units), /*generation*/ 0 +}; +PERIPHDRIVER_DECLARE(ctl, ctlfe_driver); + +extern struct ctl_softc *control_softc; + +int +ctlfeinitialize(void) +{ + cam_status status; + + STAILQ_INIT(&ctlfe_softc_list); + + mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF); + + xpt_lock_buses(); + periphdriver_register(&ctlfe_driver); + xpt_unlock_buses(); + + status = xpt_register_async(AC_PATH_REGISTERED | AC_PATH_DEREGISTERED | + AC_CONTRACT, ctlfeasync, NULL, NULL); + + if (status != CAM_REQ_CMP) { + printf("ctl: Failed to attach async callback due to CAM " + "status 0x%x!\n", status); + } + + return (0); +} + +void +ctlfeshutdown(void) +{ + return; +} + +void +ctlfeinit(void) +{ + cam_status status; + + STAILQ_INIT(&ctlfe_softc_list); + + mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF); + + KASSERT(control_softc != NULL, ("CTL is not initialized!")); + + status = xpt_register_async(AC_PATH_REGISTERED | AC_PATH_DEREGISTERED | + AC_CONTRACT, ctlfeasync, NULL, NULL); + + if (status != CAM_REQ_CMP) { + printf("ctl: Failed to attach async callback due to CAM " + "status 0x%x!\n", status); + } +} + +static void +ctlfeasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg) +{ + +#ifdef CTLFEDEBUG + printf("%s: entered\n", __func__); +#endif + + /* + * When a new path gets registered, and it is capable of target + * mode, go ahead and attach. Later on, we may need to be more + * selective, but for now this will be sufficient. + */ + switch (code) { + case AC_PATH_REGISTERED: { + struct ctl_frontend *fe; + struct ctlfe_softc *bus_softc; + struct ctlfe_lun_softc *lun_softc; + struct cam_path *path; + struct ccb_pathinq *cpi; + cam_status status; + int retval; + + cpi = (struct ccb_pathinq *)arg; + + /* Don't attach if it doesn't support target mode */ + if ((cpi->target_sprt & PIT_PROCESSOR) == 0) { + printf("%s: SIM %s%d doesn't support target mode\n", + __func__, cpi->dev_name, cpi->unit_number); + break; + } + +#ifdef CTLFE_INIT_ENABLE + if (ctlfe_num_targets >= ctlfe_max_targets) { + union ccb *ccb; + struct cam_sim *sim; + + ccb = (union ccb *)malloc(sizeof(*ccb), M_TEMP, + M_NOWAIT | M_ZERO); + if (ccb == NULL) { + printf("%s: unable to malloc CCB!\n", __func__); + xpt_free_path(path); + return; + } + xpt_setup_ccb(&ccb->ccb_h, cpi->ccb_h.path, + /*priority*/ 1); + + sim = xpt_path_sim(cpi->ccb_h.path); + + ccb->ccb_h.func_code = XPT_SET_SIM_KNOB; + ccb->knob.xport_specific.valid = KNOB_VALID_ROLE; + ccb->knob.xport_specific.fc.role = KNOB_ROLE_INITIATOR; + + /* We should hold the SIM lock here */ + mtx_assert(sim->mtx, MA_OWNED); + + xpt_action(ccb); + + if ((ccb->ccb_h.status & CAM_STATUS_MASK) != + CAM_REQ_CMP) { + printf("%s: SIM %s%d (path id %d) initiator " + "enable failed with status %#x\n", + __func__, cpi->dev_name, + cpi->unit_number, cpi->ccb_h.path_id, + ccb->ccb_h.status); + } else { + printf("%s: SIM %s%d (path id %d) initiator " + "enable succeeded\n", + __func__, cpi->dev_name, + cpi->unit_number, cpi->ccb_h.path_id); + } + + free(ccb, M_TEMP); + + break; + } else { + ctlfe_num_targets++; + } + + printf("%s: ctlfe_num_targets = %d\n", __func__, + ctlfe_num_targets); +#endif /* CTLFE_INIT_ENABLE */ + + /* + * We're in an interrupt context here, so we have to + * use M_NOWAIT. Of course this means trouble if we + * can't allocate memory. + */ + bus_softc = malloc(sizeof(*bus_softc), M_CTLFE, + M_NOWAIT | M_ZERO); + if (bus_softc == NULL) { + printf("%s: unable to malloc %zd bytes for softc\n", + __func__, sizeof(*bus_softc)); + return; + } + + bus_softc->path_id = cpi->ccb_h.path_id; + bus_softc->sim = xpt_path_sim(cpi->ccb_h.path); + STAILQ_INIT(&bus_softc->lun_softc_list); + + fe = &bus_softc->fe; + + /* + * XXX KDM should we be more accurate here ? + */ + if (cpi->transport == XPORT_FC) + fe->port_type = CTL_PORT_FC; + else + fe->port_type = CTL_PORT_SCSI; + + /* XXX KDM what should the real number be here? */ + fe->num_requested_ctl_io = 4096; + snprintf(bus_softc->port_name, sizeof(bus_softc->port_name), + "%s%d", cpi->dev_name, cpi->unit_number); + /* + * XXX KDM it would be nice to allocate storage in the + * frontend structure itself. + */ + fe->port_name = bus_softc->port_name; + fe->physical_port = cpi->unit_number; + fe->virtual_port = cpi->bus_id; + fe->port_online = ctlfe_online; + fe->port_offline = ctlfe_offline; + fe->onoff_arg = bus_softc; + fe->targ_enable = ctlfe_targ_enable; + fe->targ_disable = ctlfe_targ_disable; + fe->lun_enable = ctlfe_lun_enable; + fe->lun_disable = ctlfe_lun_disable; + fe->targ_lun_arg = bus_softc; + fe->fe_datamove = ctlfe_datamove_done; + fe->fe_done = ctlfe_datamove_done; + fe->fe_dump = ctlfe_dump; + /* + * XXX KDM the path inquiry doesn't give us the maximum + * number of targets supported. + */ + fe->max_targets = cpi->max_target; + fe->max_target_id = cpi->max_target; + + /* + * XXX KDM need to figure out whether we're the master or + * slave. + */ + printf("%s: calling ctl_frontend_register() for %s%d\n", + __func__, cpi->dev_name, cpi->unit_number); + retval = ctl_frontend_register(fe, /*master_SC*/ 1); + if (retval != 0) { + printf("%s: ctl_frontend_register() failed with " + "error %d!\n", __func__, retval); + free(bus_softc, M_CTLFE); + break; + } else { + mtx_lock(&ctlfe_list_mtx); + STAILQ_INSERT_TAIL(&ctlfe_softc_list, bus_softc, links); + mtx_unlock(&ctlfe_list_mtx); + } + + status = xpt_create_path(&path, /*periph*/ NULL, + bus_softc->path_id,CAM_TARGET_WILDCARD, + CAM_LUN_WILDCARD); + if (status != CAM_REQ_CMP) { + printf("%s: unable to create path for wildcard " + "periph\n", __func__); + break; + } + lun_softc = malloc(sizeof(*lun_softc), M_CTLFE, + M_NOWAIT | M_ZERO); + if (lun_softc == NULL) { + xpt_print(path, "%s: unable to allocate softc for " + "wildcard periph\n", __func__); + xpt_free_path(path); + break; + } + + lun_softc->parent_softc = bus_softc; + lun_softc->flags |= CTLFE_LUN_WILDCARD; + + status = cam_periph_alloc(ctlferegister, + ctlfeoninvalidate, + ctlfecleanup, + ctlfestart, + "ctl", + CAM_PERIPH_BIO, + path, + ctlfeasync, + 0, + lun_softc); + + xpt_free_path(path); + + break; + } + case AC_PATH_DEREGISTERED: + /* ctl_frontend_deregister() */ + break; + case AC_CONTRACT: { + struct ac_contract *ac; + + ac = (struct ac_contract *)arg; + + switch (ac->contract_number) { + case AC_CONTRACT_DEV_CHG: { + struct ac_device_changed *dev_chg; + struct ctlfe_softc *softc; + int retval, found; + + dev_chg = (struct ac_device_changed *)ac->contract_data; + + printf("%s: WWPN %#jx port %u path %u target %u %s\n", + __func__, dev_chg->wwpn, dev_chg->port, + xpt_path_path_id(path), dev_chg->target, + (dev_chg->arrived == 0) ? "left" : "arrived"); + + found = 0; + + mtx_lock(&ctlfe_list_mtx); + STAILQ_FOREACH(softc, &ctlfe_softc_list, links) { + if (softc->path_id == xpt_path_path_id(path)) { + found = 1; + break; + } + } + mtx_unlock(&ctlfe_list_mtx); + + if (found == 0) { + printf("%s: CTL port for CAM path %u not " + "found!\n", __func__, + xpt_path_path_id(path)); + break; + } + if (dev_chg->arrived != 0) { + retval = ctl_add_initiator(dev_chg->wwpn, + softc->fe.targ_port, dev_chg->target); + } else { + retval = ctl_remove_initiator( + softc->fe.targ_port, dev_chg->target); + } + + if (retval != 0) { + printf("%s: could not %s port %d iid %u " + "WWPN %#jx!\n", __func__, + (dev_chg->arrived != 0) ? "add" : + "remove", softc->fe.targ_port, + dev_chg->target, + (uintmax_t)dev_chg->wwpn); + } + break; + } + default: + printf("%s: unsupported contract number %ju\n", + __func__, (uintmax_t)ac->contract_number); + break; + } + break; + } + default: + break; + } +} + +static cam_status +ctlferegister(struct cam_periph *periph, void *arg) +{ + struct ctlfe_softc *bus_softc; + struct ctlfe_lun_softc *softc; + struct cam_sim *sim; + union ccb en_lun_ccb; + cam_status status; + int i; + + softc = (struct ctlfe_lun_softc *)arg; + bus_softc = softc->parent_softc; + sim = xpt_path_sim(periph->path); + + TAILQ_INIT(&softc->work_queue); + softc->periph = periph; + softc->parent_softc = bus_softc; + + callout_init_mtx(&softc->dma_callout, sim->mtx, /*flags*/ 0); + periph->softc = softc; + + xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, /*priority*/ 1); + en_lun_ccb.ccb_h.func_code = XPT_EN_LUN; + en_lun_ccb.cel.grp6_len = 0; + en_lun_ccb.cel.grp7_len = 0; + en_lun_ccb.cel.enable = 1; + xpt_action(&en_lun_ccb); + status = (en_lun_ccb.ccb_h.status & CAM_STATUS_MASK); + if (status != CAM_REQ_CMP) { + xpt_print(periph->path, "%s: Enable LUN failed, status 0x%x\n", + __func__, en_lun_ccb.ccb_h.status); + return (status); + } + + status = CAM_REQ_CMP; + + for (i = 0; i < CTLFE_ATIO_PER_LUN; i++) { + union ccb *new_ccb; + + new_ccb = (union ccb *)malloc(sizeof(*new_ccb), M_CTLFE, + M_NOWAIT); + if (new_ccb == NULL) { + status = CAM_RESRC_UNAVAIL; + break; + } + xpt_setup_ccb(&new_ccb->ccb_h, periph->path, /*priority*/ 1); + new_ccb->ccb_h.func_code = XPT_ACCEPT_TARGET_IO; + new_ccb->ccb_h.cbfcnp = ctlfedone; + xpt_action(new_ccb); + softc->atios_sent++; + status = new_ccb->ccb_h.status; + if ((status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { + free(new_ccb, M_CTLFE); + break; + } + } + + status = cam_periph_acquire(periph); + if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) { + xpt_print(periph->path, "%s: could not acquire reference " + "count, status = %#x\n", __func__, status); + return (status); + } + + if (i == 0) { + xpt_print(periph->path, "%s: could not allocate ATIO CCBs, " + "status 0x%x\n", __func__, status); + return (CAM_REQ_CMP_ERR); + } + + for (i = 0; i < CTLFE_IN_PER_LUN; i++) { + union ccb *new_ccb; + + new_ccb = (union ccb *)malloc(sizeof(*new_ccb), M_CTLFE, + M_NOWAIT); + if (new_ccb == NULL) { + status = CAM_RESRC_UNAVAIL; + break; + } + + xpt_setup_ccb(&new_ccb->ccb_h, periph->path, /*priority*/ 1); + new_ccb->ccb_h.func_code = XPT_IMMEDIATE_NOTIFY; + new_ccb->ccb_h.cbfcnp = ctlfedone; + xpt_action(new_ccb); + softc->inots_sent++; + status = new_ccb->ccb_h.status; + if (status != CAM_REQ_INPROG) { + free(new_ccb, M_CTLFE); + break; + } + } + if (i == 0) { + xpt_print(periph->path, "%s: could not allocate immediate " + "notify CCBs, status 0x%x\n", __func__, status); + return (CAM_REQ_CMP_ERR); + } + return (CAM_REQ_CMP); +} + +static void +ctlfeoninvalidate(struct cam_periph *periph) +{ + union ccb en_lun_ccb; + cam_status status; + struct ctlfe_lun_softc *softc; + + softc = (struct ctlfe_lun_softc *)periph->softc; + + xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, /*priority*/ 1); + en_lun_ccb.ccb_h.func_code = XPT_EN_LUN; + en_lun_ccb.cel.grp6_len = 0; + en_lun_ccb.cel.grp7_len = 0; + en_lun_ccb.cel.enable = 0; + xpt_action(&en_lun_ccb); + status = (en_lun_ccb.ccb_h.status & CAM_STATUS_MASK); + if (status != CAM_REQ_CMP) { + xpt_print(periph->path, "%s: Disable LUN failed, status 0x%x\n", + __func__, en_lun_ccb.ccb_h.status); + /* + * XXX KDM what do we do now? + */ + } + xpt_print(periph->path, "LUN removed, %ju ATIOs outstanding, %ju " + "INOTs outstanding, %d refs\n", softc->atios_sent - + softc->atios_returned, softc->inots_sent - + softc->inots_returned, periph->refcount); +} + +static void +ctlfecleanup(struct cam_periph *periph) +{ + struct ctlfe_lun_softc *softc; + struct ctlfe_softc *bus_softc; + + xpt_print(periph->path, "%s: Called\n", __func__); + + softc = (struct ctlfe_lun_softc *)periph->softc; + bus_softc = softc->parent_softc; + + STAILQ_REMOVE(&bus_softc->lun_softc_list, softc, ctlfe_lun_softc,links); + + /* + * XXX KDM is there anything else that needs to be done here? + */ + free(softc, M_CTLFE); +} + +static void +ctlfestart(struct cam_periph *periph, union ccb *start_ccb) +{ + struct ctlfe_lun_softc *softc; + struct ccb_hdr *ccb_h; + + softc = (struct ctlfe_lun_softc *)periph->softc; + + softc->ccbs_alloced++; + + ccb_h = TAILQ_FIRST(&softc->work_queue); + if (periph->immediate_priority <= periph->pinfo.priority) { + panic("shouldn't get to the CCB waiting case!"); + start_ccb->ccb_h.ccb_type = CTLFE_CCB_WAITING; + SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, + periph_links.sle); + periph->immediate_priority = CAM_PRIORITY_NONE; + wakeup(&periph->ccb_list); + } else if (ccb_h == NULL) { + softc->ccbs_freed++; + xpt_release_ccb(start_ccb); + } else { + struct ccb_accept_tio *atio; + struct ccb_scsiio *csio; + uint8_t *data_ptr; + uint32_t dxfer_len; + ccb_flags flags; + union ctl_io *io; + uint8_t scsi_status; + + /* Take the ATIO off the work queue */ + TAILQ_REMOVE(&softc->work_queue, ccb_h, periph_links.tqe); + atio = (struct ccb_accept_tio *)ccb_h; + io = (union ctl_io *)ccb_h->io_ptr; + csio = &start_ccb->csio; + + flags = atio->ccb_h.flags & + (CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK); + + if ((io == NULL) + || (io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) { + /* + * We're done, send status back. + */ + flags |= CAM_SEND_STATUS; + if (io == NULL) { + scsi_status = SCSI_STATUS_BUSY; + csio->sense_len = 0; + } else if ((io->io_hdr.status & CTL_STATUS_MASK) == + CTL_CMD_ABORTED) { + io->io_hdr.flags &= ~CTL_FLAG_STATUS_QUEUED; + + /* + * If this command was aborted, we don't + * need to send status back to the SIM. + * Just free the CTIO and ctl_io, and + * recycle the ATIO back to the SIM. + */ + xpt_print(periph->path, "%s: aborted " + "command 0x%04x discarded\n", + __func__, io->scsiio.tag_num); + ctl_free_io(io); + /* + * For a wildcard attachment, commands can + * come in with a specific target/lun. Reset + * the target and LUN fields back to the + * wildcard values before we send them back + * down to the SIM. The SIM has a wildcard + * LUN enabled, not whatever target/lun + * these happened to be. + */ + if (softc->flags & CTLFE_LUN_WILDCARD) { + atio->ccb_h.target_id = + CAM_TARGET_WILDCARD; + atio->ccb_h.target_lun = + CAM_LUN_WILDCARD; + } + + if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) { + cam_release_devq(periph->path, + /*relsim_flags*/0, + /*reduction*/0, + /*timeout*/0, + /*getcount_only*/0); + atio->ccb_h.status &= ~CAM_DEV_QFRZN; + } + + ccb_h = TAILQ_FIRST(&softc->work_queue); + + if (atio->ccb_h.func_code != + XPT_ACCEPT_TARGET_IO) { + xpt_print(periph->path, "%s: func_code " + "is %#x\n", __func__, + atio->ccb_h.func_code); + } + start_ccb->ccb_h.func_code = XPT_ABORT; + start_ccb->cab.abort_ccb = (union ccb *)atio; + start_ccb->ccb_h.cbfcnp = ctlfedone; + + /* Tell the SIM that we've aborted this ATIO */ + xpt_action(start_ccb); + softc->ccbs_freed++; + xpt_release_ccb(start_ccb); + + /* + * Send the ATIO back down to the SIM. + */ + xpt_action((union ccb *)atio); + softc->atios_sent++; + + /* + * If we still have work to do, ask for + * another CCB. Otherwise, deactivate our + * callout. + */ + if (ccb_h != NULL) + xpt_schedule(periph, /*priority*/ 1); + else + callout_stop(&softc->dma_callout); + + return; + } else { + io->io_hdr.flags &= ~CTL_FLAG_STATUS_QUEUED; + scsi_status = io->scsiio.scsi_status; + csio->sense_len = io->scsiio.sense_len; + } + data_ptr = NULL; + dxfer_len = 0; + if (io == NULL) { + printf("%s: tag %04x io is NULL\n", __func__, + atio->tag_id); + } else { +#ifdef CTLFEDEBUG + printf("%s: tag %04x status %x\n", __func__, + atio->tag_id, io->io_hdr.status); +#endif + } + csio->sglist_cnt = 0; + if (csio->sense_len != 0) { + csio->sense_data = io->scsiio.sense_data; + flags |= CAM_SEND_SENSE; + } else if (scsi_status == SCSI_STATUS_CHECK_COND) { + xpt_print(periph->path, "%s: check condition " + "with no sense\n", __func__); + } + } else { + struct ctlfe_lun_cmd_info *cmd_info; + + /* + * Datamove call, we need to setup the S/G list. + * If we pass in a S/G list, the isp(4) driver at + * least expects physical/bus addresses. + */ + + cmd_info = (struct ctlfe_lun_cmd_info *) + io->io_hdr.port_priv; + + KASSERT(sizeof(*cmd_info) < CTL_PORT_PRIV_SIZE, + ("%s: sizeof(struct ctlfe_lun_cmd_info) %zd < " + "CTL_PORT_PRIV_SIZE %d", __func__, + sizeof(*cmd_info), CTL_PORT_PRIV_SIZE)); + io->io_hdr.flags &= ~CTL_FLAG_DMA_QUEUED; + + /* + * Need to zero this, in case it has been used for + * a previous datamove for this particular I/O. + */ + bzero(cmd_info, sizeof(*cmd_info)); + scsi_status = 0; + + /* + * Set the direction, relative to the initiator. + */ + flags &= ~CAM_DIR_MASK; + if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == + CTL_FLAG_DATA_IN) + flags |= CAM_DIR_IN; + else + flags |= CAM_DIR_OUT; + + csio->cdb_len = atio->cdb_len; + + if (io->scsiio.kern_sg_entries == 0) { + /* No S/G list */ + data_ptr = io->scsiio.kern_data_ptr; + dxfer_len = io->scsiio.kern_data_len; + csio->sglist_cnt = 0; + + if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) + flags |= CAM_DATA_PHYS; + } else if (io->scsiio.kern_sg_entries <= + (sizeof(cmd_info->cam_sglist)/ + sizeof(cmd_info->cam_sglist[0]))) { + /* + * S/G list with physical or virtual pointers. + * Just populate the CAM S/G list with the + * pointers. + */ + int i; + struct ctl_sg_entry *ctl_sglist; + bus_dma_segment_t *cam_sglist; + + ctl_sglist = (struct ctl_sg_entry *) + io->scsiio.kern_data_ptr; + cam_sglist = cmd_info->cam_sglist; + + for (i = 0; i < io->scsiio.kern_sg_entries;i++){ + cam_sglist[i].ds_addr = + (bus_addr_t)ctl_sglist[i].addr; + cam_sglist[i].ds_len = + ctl_sglist[i].len; + } + csio->sglist_cnt = io->scsiio.kern_sg_entries; + flags |= CAM_SCATTER_VALID; + if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) + flags |= CAM_SG_LIST_PHYS; + else + flags &= ~CAM_SG_LIST_PHYS; + data_ptr = (uint8_t *)cam_sglist; + dxfer_len = io->scsiio.kern_data_len; + } else { + /* S/G list with virtual pointers */ + struct ctl_sg_entry *sglist; + int *ti; + + /* + * XXX KDM this is a temporary hack. The + * isp(4) driver can't deal with S/G lists + * with virtual pointers, so we need to + * go through and send down one virtual + * pointer at a time. + */ + sglist = (struct ctl_sg_entry *) + io->scsiio.kern_data_ptr; + ti = &cmd_info->cur_transfer_index; + data_ptr = sglist[*ti].addr; + dxfer_len = sglist[*ti].len; + csio->sglist_cnt = 0; + cmd_info->flags |= CTLFE_CMD_PIECEWISE; + (*ti)++; + } + + io->scsiio.ext_data_filled += dxfer_len; + + if (io->scsiio.ext_data_filled > + io->scsiio.kern_total_len) { + xpt_print(periph->path, "%s: tag 0x%04x " + "fill len %u > total %u\n", + __func__, io->scsiio.tag_num, + io->scsiio.ext_data_filled, + io->scsiio.kern_total_len); + } + } + +#ifdef CTLFEDEBUG + printf("%s: %s: tag %04x flags %x ptr %p len %u\n", __func__, + (flags & CAM_SEND_STATUS) ? "done" : "datamove", + atio->tag_id, flags, data_ptr, dxfer_len); +#endif + + /* + * Valid combinations: + * - CAM_SEND_STATUS, SCATTER_VALID = 0, dxfer_len = 0, + * sglist_cnt = 0 + * - CAM_SEND_STATUS = 0, SCATTER_VALID = 0, dxfer_len != 0, + * sglist_cnt = 0 + * - CAM_SEND_STATUS = 0, SCATTER_VALID, dxfer_len != 0, + * sglist_cnt != 0 + */ +#ifdef CTLFEDEBUG + if (((flags & CAM_SEND_STATUS) + && (((flags & CAM_SCATTER_VALID) != 0) + || (dxfer_len != 0) + || (csio->sglist_cnt != 0))) + || (((flags & CAM_SEND_STATUS) == 0) + && (dxfer_len == 0)) + || ((flags & CAM_SCATTER_VALID) + && (csio->sglist_cnt == 0)) + || (((flags & CAM_SCATTER_VALID) == 0) + && (csio->sglist_cnt != 0))) { + printf("%s: tag %04x cdb %02x flags %#x dxfer_len " + "%d sg %u\n", __func__, atio->tag_id, + atio->cdb_io.cdb_bytes[0], flags, dxfer_len, + csio->sglist_cnt); + if (io != NULL) { + printf("%s: tag %04x io status %#x\n", __func__, + atio->tag_id, io->io_hdr.status); + } else { + printf("%s: tag %04x no associated io\n", + __func__, atio->tag_id); + } + } +#endif + cam_fill_ctio(csio, + /*retries*/ 2, + ctlfedone, + flags, + (flags & CAM_TAG_ACTION_VALID) ? + MSG_SIMPLE_Q_TAG : 0, + atio->tag_id, + atio->init_id, + scsi_status, + /*data_ptr*/ data_ptr, + /*dxfer_len*/ dxfer_len, + /*timeout*/ 5 * 1000); + start_ccb->ccb_h.ccb_atio = atio; + if (((flags & CAM_SEND_STATUS) == 0) + && (io != NULL)) + io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; + + softc->ctios_sent++; + + xpt_action(start_ccb); + + if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) { + cam_release_devq(periph->path, + /*relsim_flags*/0, + /*reduction*/0, + /*timeout*/0, + /*getcount_only*/0); + atio->ccb_h.status &= ~CAM_DEV_QFRZN; + } + + ccb_h = TAILQ_FIRST(&softc->work_queue); + } + /* + * If we still have work to do, ask for another CCB. Otherwise, + * deactivate our callout. + */ + if (ccb_h != NULL) + xpt_schedule(periph, /*priority*/ 1); + else + callout_stop(&softc->dma_callout); +} + +static void +ctlfe_free_ccb(struct cam_periph *periph, union ccb *ccb) +{ + struct ctlfe_lun_softc *softc; + + softc = (struct ctlfe_lun_softc *)periph->softc; + + switch (ccb->ccb_h.func_code) { + case XPT_ACCEPT_TARGET_IO: + softc->atios_returned++; + break; + case XPT_IMMEDIATE_NOTIFY: + case XPT_NOTIFY_ACKNOWLEDGE: + softc->inots_returned++; + break; + default: + break; + } + + free(ccb, M_CTLFE); + + KASSERT(softc->atios_returned <= softc->atios_sent, ("%s: " + "atios_returned %ju > atios_sent %ju", __func__, + softc->atios_returned, softc->atios_sent)); + KASSERT(softc->inots_returned <= softc->inots_sent, ("%s: " + "inots_returned %ju > inots_sent %ju", __func__, + softc->inots_returned, softc->inots_sent)); + + /* + * If we have received all of our CCBs, we can release our + * reference on the peripheral driver. It will probably go away + * now. + */ + if ((softc->atios_returned == softc->atios_sent) + && (softc->inots_returned == softc->inots_sent)) { + cam_periph_release_locked(periph); + } +} + +static void +ctlfedone(struct cam_periph *periph, union ccb *done_ccb) +{ + struct ctlfe_lun_softc *softc; + struct ctlfe_softc *bus_softc; + +#ifdef CTLFE_DEBUG + printf("%s: entered, func_code = %#x, type = %#lx\n", __func__, + done_ccb->ccb_h.func_code, done_ccb->ccb_h.ccb_type); +#endif + + softc = (struct ctlfe_lun_softc *)periph->softc; + bus_softc = softc->parent_softc; + + if (done_ccb->ccb_h.ccb_type == CTLFE_CCB_WAITING) { + panic("shouldn't get to the CCB waiting case!"); + wakeup(&done_ccb->ccb_h.cbfcnp); + return; + } + + /* + * If the peripheral is invalid, ATIOs and immediate notify CCBs + * need to be freed. Most of the ATIOs and INOTs that come back + * will be CCBs that are being returned from the SIM as a result of + * our disabling the LUN. + * + * Other CCB types are handled in their respective cases below. + */ + if (periph->flags & CAM_PERIPH_INVALID) { + switch (done_ccb->ccb_h.func_code) { + case XPT_ACCEPT_TARGET_IO: + case XPT_IMMEDIATE_NOTIFY: + case XPT_NOTIFY_ACKNOWLEDGE: + ctlfe_free_ccb(periph, done_ccb); + return; + default: + break; + } + + } + switch (done_ccb->ccb_h.func_code) { + case XPT_ACCEPT_TARGET_IO: { + union ctl_io *io; + struct ccb_accept_tio *atio; + + atio = &done_ccb->atio; + + softc->atios_returned++; + + /* + * Allocate a ctl_io, pass it to CTL, and wait for the + * datamove or done. + */ + io = ctl_alloc_io(bus_softc->fe.ctl_pool_ref); + if (io == NULL) { + atio->ccb_h.flags &= ~CAM_DIR_MASK; + atio->ccb_h.flags |= CAM_DIR_NONE; + + printf("%s: ctl_alloc_io failed!\n", __func__); + + /* + * XXX KDM need to set SCSI_STATUS_BUSY, but there + * is no field in the ATIO structure to do that, + * and we aren't able to allocate a ctl_io here. + * What to do? + */ + atio->sense_len = 0; + done_ccb->ccb_h.io_ptr = NULL; + TAILQ_INSERT_TAIL(&softc->work_queue, &atio->ccb_h, + periph_links.tqe); + xpt_schedule(periph, /*priority*/ 1); + break; + } + ctl_zero_io(io); + + /* Save pointers on both sides */ + io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = done_ccb; + done_ccb->ccb_h.io_ptr = io; + + /* + * Only SCSI I/O comes down this path, resets, etc. come + * down the immediate notify path below. + */ + io->io_hdr.io_type = CTL_IO_SCSI; + io->io_hdr.nexus.initid.id = atio->init_id; + io->io_hdr.nexus.targ_port = bus_softc->fe.targ_port; + io->io_hdr.nexus.targ_target.id = atio->ccb_h.target_id; + io->io_hdr.nexus.targ_lun = atio->ccb_h.target_lun; + io->scsiio.tag_num = atio->tag_id; + switch (atio->tag_action) { + case CAM_TAG_ACTION_NONE: + io->scsiio.tag_type = CTL_TAG_UNTAGGED; + break; + case MSG_SIMPLE_TASK: + io->scsiio.tag_type = CTL_TAG_SIMPLE; + break; + case MSG_HEAD_OF_QUEUE_TASK: + io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; + break; + case MSG_ORDERED_TASK: + io->scsiio.tag_type = CTL_TAG_ORDERED; + break; + case MSG_ACA_TASK: + io->scsiio.tag_type = CTL_TAG_ACA; + break; + default: + io->scsiio.tag_type = CTL_TAG_UNTAGGED; + printf("%s: unhandled tag type %#x!!\n", __func__, + atio->tag_action); + break; + } + if (atio->cdb_len > sizeof(io->scsiio.cdb)) { + printf("%s: WARNING: CDB len %d > ctl_io space %zd\n", + __func__, atio->cdb_len, sizeof(io->scsiio.cdb)); + } + io->scsiio.cdb_len = min(atio->cdb_len, sizeof(io->scsiio.cdb)); + bcopy(atio->cdb_io.cdb_bytes, io->scsiio.cdb, + io->scsiio.cdb_len); + +#ifdef CTLFEDEBUG + printf("%s: %ju:%d:%ju:%d: tag %04x CDB %02x\n", __func__, + (uintmax_t)io->io_hdr.nexus.initid.id, + io->io_hdr.nexus.targ_port, + (uintmax_t)io->io_hdr.nexus.targ_target.id, + io->io_hdr.nexus.targ_lun, + io->scsiio.tag_num, io->scsiio.cdb[0]); +#endif + + ctl_queue(io); + break; + } + case XPT_CONT_TARGET_IO: { + struct ccb_accept_tio *atio; + union ctl_io *io; + + atio = (struct ccb_accept_tio *)done_ccb->ccb_h.ccb_atio; + io = (union ctl_io *)atio->ccb_h.io_ptr; + + softc->ctios_returned++; +#ifdef CTLFEDEBUG + printf("%s: got XPT_CONT_TARGET_IO tag %#x flags %#x\n", + __func__, atio->tag_id, done_ccb->ccb_h.flags); +#endif + /* + * If we were sending status back to the initiator, free up + * resources. If we were doing a datamove, call the + * datamove done routine. + */ + if (done_ccb->ccb_h.flags & CAM_SEND_STATUS) { + softc->ccbs_freed++; + xpt_release_ccb(done_ccb); + ctl_free_io(io); + /* + * For a wildcard attachment, commands can come in + * with a specific target/lun. Reset the target + * and LUN fields back to the wildcard values before + * we send them back down to the SIM. The SIM has + * a wildcard LUN enabled, not whatever target/lun + * these happened to be. + */ + if (softc->flags & CTLFE_LUN_WILDCARD) { + atio->ccb_h.target_id = CAM_TARGET_WILDCARD; + atio->ccb_h.target_lun = CAM_LUN_WILDCARD; + } + if (periph->flags & CAM_PERIPH_INVALID) { + ctlfe_free_ccb(periph, (union ccb *)atio); + return; + } else { + xpt_action((union ccb *)atio); + softc->atios_sent++; + } + } else { + struct ctlfe_lun_cmd_info *cmd_info; + struct ccb_scsiio *csio; + + csio = &done_ccb->csio; + cmd_info = (struct ctlfe_lun_cmd_info *) + io->io_hdr.port_priv; + + io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; + + io->scsiio.ext_data_len += csio->dxfer_len; + if (io->scsiio.ext_data_len > + io->scsiio.kern_total_len) { + xpt_print(periph->path, "%s: tag 0x%04x " + "done len %u > total %u sent %u\n", + __func__, io->scsiio.tag_num, + io->scsiio.ext_data_len, + io->scsiio.kern_total_len, + io->scsiio.ext_data_filled); + } + /* + * Translate CAM status to CTL status. Success + * does not change the overall, ctl_io status. In + * that case we just set port_status to 0. If we + * have a failure, though, set a data phase error + * for the overall ctl_io. + */ + switch (done_ccb->ccb_h.status & CAM_STATUS_MASK) { + case CAM_REQ_CMP: + io->io_hdr.port_status = 0; + break; + default: + /* + * XXX KDM the isp(4) driver doesn't really + * seem to send errors back for data + * transfers that I can tell. There is one + * case where it'll send CAM_REQ_CMP_ERR, + * but probably not that many more cases. + * So set a generic data phase error here, + * like the SXP driver sets. + */ + io->io_hdr.port_status = 0xbad1; + ctl_set_data_phase_error(&io->scsiio); + /* + * XXX KDM figure out residual. + */ + break; + } + /* + * If we had to break this S/G list into multiple + * pieces, figure out where we are in the list, and + * continue sending pieces if necessary. + */ + if ((cmd_info->flags & CTLFE_CMD_PIECEWISE) + && (io->io_hdr.port_status == 0) + && (cmd_info->cur_transfer_index < + io->scsiio.kern_sg_entries)) { + struct ctl_sg_entry *sglist; + ccb_flags flags; + uint8_t scsi_status; + uint8_t *data_ptr; + uint32_t dxfer_len; + int *ti; + + sglist = (struct ctl_sg_entry *) + io->scsiio.kern_data_ptr; + ti = &cmd_info->cur_transfer_index; + flags = atio->ccb_h.flags & + (CAM_DIS_DISCONNECT| + CAM_TAG_ACTION_VALID| + CAM_DIR_MASK); + + /* + * Set the direction, relative to the initiator. + */ + flags &= ~CAM_DIR_MASK; + if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == + CTL_FLAG_DATA_IN) + flags |= CAM_DIR_IN; + else + flags |= CAM_DIR_OUT; + + data_ptr = sglist[*ti].addr; + dxfer_len = sglist[*ti].len; + (*ti)++; + + scsi_status = 0; + + if (((flags & CAM_SEND_STATUS) == 0) + && (dxfer_len == 0)) { + printf("%s: tag %04x no status or " + "len cdb = %02x\n", __func__, + atio->tag_id, + atio->cdb_io.cdb_bytes[0]); + printf("%s: tag %04x io status %#x\n", + __func__, atio->tag_id, + io->io_hdr.status); + } + + cam_fill_ctio(csio, + /*retries*/ 2, + ctlfedone, + flags, + (flags & CAM_TAG_ACTION_VALID) ? + MSG_SIMPLE_Q_TAG : 0, + atio->tag_id, + atio->init_id, + scsi_status, + /*data_ptr*/ data_ptr, + /*dxfer_len*/ dxfer_len, + /*timeout*/ 5 * 1000); + + csio->resid = 0; + csio->ccb_h.ccb_atio = atio; + io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; + softc->ctios_sent++; + xpt_action((union ccb *)csio); + } else { + /* + * Release the CTIO. The ATIO will be sent back + * down to the SIM once we send status. + */ + softc->ccbs_freed++; + xpt_release_ccb(done_ccb); + + /* Call the backend move done callback */ + io->scsiio.be_move_done(io); + } + } + break; + } + case XPT_IMMEDIATE_NOTIFY: { + union ctl_io *io; + struct ccb_immediate_notify *inot; + cam_status status; + int frozen; + + inot = &done_ccb->cin1; + + softc->inots_returned++; + + frozen = (done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0; + + printf("%s: got XPT_IMMEDIATE_NOTIFY status %#x tag %#x " + "seq %#x\n", __func__, inot->ccb_h.status, + inot->tag_id, inot->seq_id); + + io = ctl_alloc_io(bus_softc->fe.ctl_pool_ref); + if (io != NULL) { + int send_ctl_io; + + send_ctl_io = 1; + + ctl_zero_io(io); + io->io_hdr.io_type = CTL_IO_TASK; + io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr =done_ccb; + inot->ccb_h.io_ptr = io; + io->io_hdr.nexus.initid.id = inot->initiator_id; + io->io_hdr.nexus.targ_port = bus_softc->fe.targ_port; + io->io_hdr.nexus.targ_target.id = inot->ccb_h.target_id; + io->io_hdr.nexus.targ_lun = inot->ccb_h.target_lun; + /* XXX KDM should this be the tag_id? */ + io->taskio.tag_num = inot->seq_id; + + status = inot->ccb_h.status & CAM_STATUS_MASK; + switch (status) { + case CAM_SCSI_BUS_RESET: + io->taskio.task_action = CTL_TASK_BUS_RESET; + break; + case CAM_BDR_SENT: + io->taskio.task_action = CTL_TASK_TARGET_RESET; + break; + case CAM_MESSAGE_RECV: + switch (inot->arg) { + case MSG_ABORT_TASK_SET: + /* + * XXX KDM this isn't currently + * supported by CTL. It ends up + * being a no-op. + */ + io->taskio.task_action = + CTL_TASK_ABORT_TASK_SET; + break; + case MSG_TARGET_RESET: + io->taskio.task_action = + CTL_TASK_TARGET_RESET; + break; + case MSG_ABORT_TASK: + io->taskio.task_action = + CTL_TASK_ABORT_TASK; + break; + case MSG_LOGICAL_UNIT_RESET: + io->taskio.task_action = + CTL_TASK_LUN_RESET; + break; + case MSG_CLEAR_TASK_SET: + /* + * XXX KDM this isn't currently + * supported by CTL. It ends up + * being a no-op. + */ + io->taskio.task_action = + CTL_TASK_CLEAR_TASK_SET; + break; + case MSG_CLEAR_ACA: + io->taskio.task_action = + CTL_TASK_CLEAR_ACA; + break; + case MSG_NOOP: + send_ctl_io = 0; + break; + default: + xpt_print(periph->path, "%s: " + "unsupported message 0x%x\n", + __func__, inot->arg); + send_ctl_io = 0; + break; + } + break; + case CAM_REQ_ABORTED: + /* + * This request was sent back by the driver. + * XXX KDM what do we do here? + */ + send_ctl_io = 0; + break; + default: + xpt_print(periph->path, "%s: " + "unsupported CAM status 0x%x\n", + __func__, status); + send_ctl_io = 0; + break; + } + if (send_ctl_io != 0) { + ctl_queue(io); + } else { + ctl_free_io(io); + done_ccb->ccb_h.status = CAM_REQ_INPROG; + done_ccb->ccb_h.func_code = + XPT_NOTIFY_ACKNOWLEDGE; + xpt_action(done_ccb); + } + } else { + xpt_print(periph->path, "%s: could not allocate " + "ctl_io for immediate notify!\n", __func__); + /* requeue this to the adapter */ + done_ccb->ccb_h.status = CAM_REQ_INPROG; + done_ccb->ccb_h.func_code = XPT_NOTIFY_ACKNOWLEDGE; + xpt_action(done_ccb); + } + + if (frozen != 0) { + cam_release_devq(periph->path, + /*relsim_flags*/ 0, + /*opening reduction*/ 0, + /*timeout*/ 0, + /*getcount_only*/ 0); + } + break; + } + case XPT_NOTIFY_ACKNOWLEDGE: + /* + * Queue this back down to the SIM as an immediate notify. + */ + done_ccb->ccb_h.func_code = XPT_IMMEDIATE_NOTIFY; + xpt_action(done_ccb); + softc->inots_sent++; + break; + case XPT_ABORT: + /* + * XPT_ABORT is an immediate CCB, we shouldn't get here. + */ + panic("%s: XPT_ABORT CCB returned!", __func__); + break; + case XPT_SET_SIM_KNOB: + case XPT_GET_SIM_KNOB: + break; + default: + panic("%s: unexpected CCB type %#x", __func__, + done_ccb->ccb_h.func_code); + break; + } +} + +static void +ctlfe_onoffline(void *arg, int online) +{ + struct ctlfe_softc *bus_softc; + union ccb *ccb; + cam_status status; + struct cam_path *path; + struct cam_sim *sim; + int set_wwnn; + + bus_softc = (struct ctlfe_softc *)arg; + + set_wwnn = 0; + + status = xpt_create_path(&path, /*periph*/ NULL, bus_softc->path_id, + CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); + if (status != CAM_REQ_CMP) { + printf("%s: unable to create path!\n", __func__); + return; + } + ccb = (union ccb *)malloc(sizeof(*ccb), M_TEMP, M_WAITOK | M_ZERO); + if (ccb == NULL) { + printf("%s: unable to malloc CCB!\n", __func__); + xpt_free_path(path); + return; + } + xpt_setup_ccb(&ccb->ccb_h, path, /*priority*/ 1); + + sim = xpt_path_sim(path); + + /* + * Copan WWN format: + * + * Bits 63-60: 0x5 NAA, IEEE registered name + * Bits 59-36: 0x000ED5 IEEE Company name assigned to Copan + * Bits 35-12: Copan SSN (Sequential Serial Number) + * Bits 11-8: Type of port: + * 1 == N-Port + * 2 == F-Port + * 3 == NL-Port + * Bits 7-0: 0 == Node Name, >0 == Port Number + */ + + if (online != 0) { + + ccb->ccb_h.func_code = XPT_GET_SIM_KNOB; + + CAM_SIM_LOCK(sim); + + xpt_action(ccb); + + CAM_SIM_UNLOCK(sim); + + if ((ccb->knob.xport_specific.valid & KNOB_VALID_ADDRESS) != 0){ +#ifdef RANDOM_WWNN + uint64_t random_bits; +#endif + + printf("%s: %s current WWNN %#jx\n", __func__, + bus_softc->port_name, + ccb->knob.xport_specific.fc.wwnn); + printf("%s: %s current WWPN %#jx\n", __func__, + bus_softc->port_name, + ccb->knob.xport_specific.fc.wwpn); + +#ifdef RANDOM_WWNN + arc4rand(&random_bits, sizeof(random_bits), 0); +#endif + + /* + * XXX KDM this is a bit of a kludge for now. We + * take the current WWNN/WWPN from the card, and + * replace the company identifier and the NL-Port + * indicator and the port number (for the WWPN). + * This should be replaced later with ddb_GetWWNN, + * or possibly a more centralized scheme. (It + * would be nice to have the WWNN/WWPN for each + * port stored in the ctl_frontend structure.) + */ +#ifdef RANDOM_WWNN + ccb->knob.xport_specific.fc.wwnn = + (random_bits & + 0x0000000fffffff00ULL) | + /* Company ID */ 0x5000ED5000000000ULL | + /* NL-Port */ 0x0300; + ccb->knob.xport_specific.fc.wwpn = + (random_bits & + 0x0000000fffffff00ULL) | + /* Company ID */ 0x5000ED5000000000ULL | + /* NL-Port */ 0x3000 | + /* Port Num */ (bus_softc->fe.targ_port & 0xff); + + /* + * This is a bit of an API break/reversal, but if + * we're doing the random WWNN that's a little + * different anyway. So record what we're actually + * using with the frontend code so it's reported + * accurately. + */ + bus_softc->fe.wwnn = + ccb->knob.xport_specific.fc.wwnn; + bus_softc->fe.wwpn = + ccb->knob.xport_specific.fc.wwpn; + set_wwnn = 1; +#else /* RANDOM_WWNN */ + /* + * If the user has specified a WWNN/WWPN, send them + * down to the SIM. Otherwise, record what the SIM + * has reported. + */ + if ((bus_softc->fe.wwnn != 0) + && (bus_softc->fe.wwpn != 0)) { + ccb->knob.xport_specific.fc.wwnn = + bus_softc->fe.wwnn; + ccb->knob.xport_specific.fc.wwpn = + bus_softc->fe.wwpn; + set_wwnn = 1; + } else { + bus_softc->fe.wwnn = + ccb->knob.xport_specific.fc.wwnn; + bus_softc->fe.wwpn = + ccb->knob.xport_specific.fc.wwpn; + } +#endif /* RANDOM_WWNN */ + + + if (set_wwnn != 0) { + printf("%s: %s new WWNN %#jx\n", __func__, + bus_softc->port_name, + ccb->knob.xport_specific.fc.wwnn); + printf("%s: %s new WWPN %#jx\n", __func__, + bus_softc->port_name, + ccb->knob.xport_specific.fc.wwpn); + } + } else { + printf("%s: %s has no valid WWNN/WWPN\n", __func__, + bus_softc->port_name); + } + } + ccb->ccb_h.func_code = XPT_SET_SIM_KNOB; + ccb->knob.xport_specific.valid = KNOB_VALID_ROLE; + if (set_wwnn != 0) + ccb->knob.xport_specific.valid |= KNOB_VALID_ADDRESS; + + if (online != 0) + ccb->knob.xport_specific.fc.role = KNOB_ROLE_TARGET; + else + ccb->knob.xport_specific.fc.role = KNOB_ROLE_NONE; + + + CAM_SIM_LOCK(sim); + + xpt_action(ccb); + + CAM_SIM_UNLOCK(sim); + + if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { + printf("%s: SIM %s (path id %d) target %s failed with " + "status %#x\n", + __func__, bus_softc->port_name, bus_softc->path_id, + (online != 0) ? "enable" : "disable", + ccb->ccb_h.status); + } else { + printf("%s: SIM %s (path id %d) target %s succeeded\n", + __func__, bus_softc->port_name, bus_softc->path_id, + (online != 0) ? "enable" : "disable"); + } + + free(ccb, M_TEMP); + xpt_free_path(path); + + return; +} + +static void +ctlfe_online(void *arg) +{ + ctlfe_onoffline(arg, /*online*/ 1); +} + +static void +ctlfe_offline(void *arg) +{ + ctlfe_onoffline(arg, /*online*/ 0); +} + +static int +ctlfe_targ_enable(void *arg, struct ctl_id targ_id) +{ + return (0); +} + +static int +ctlfe_targ_disable(void *arg, struct ctl_id targ_id) +{ + return (0); +} + +/* + * This will get called to enable a LUN on every bus that is attached to + * CTL. So we only need to create a path/periph for this particular bus. + */ +static int +ctlfe_lun_enable(void *arg, struct ctl_id targ_id, int lun_id) +{ + struct ctlfe_softc *bus_softc; + struct ctlfe_lun_softc *softc; + struct cam_path *path; + struct cam_periph *periph; + struct cam_sim *sim; + cam_status status; + + + bus_softc = (struct ctlfe_softc *)arg; + + status = xpt_create_path_unlocked(&path, /*periph*/ NULL, + bus_softc->path_id, + targ_id.id, + lun_id); + /* XXX KDM need some way to return status to CTL here? */ + if (status != CAM_REQ_CMP) { + printf("%s: could not create path, status %#x\n", __func__, + status); + return (1); + } + + softc = malloc(sizeof(*softc), M_CTLFE, M_WAITOK | M_ZERO); + if (softc == NULL) { + printf("%s: could not allocate %zd bytes for softc\n", + __func__, sizeof(*softc)); + xpt_free_path(path); + return (1); + } + sim = xpt_path_sim(path); + mtx_lock(sim->mtx); + periph = cam_periph_find(path, "ctl"); + if (periph != NULL) { + /* We've already got a periph, no need to alloc a new one. */ + xpt_free_path(path); + free(softc, M_CTLFE); + mtx_unlock(sim->mtx); + return (0); + } + + softc->parent_softc = bus_softc; + STAILQ_INSERT_TAIL(&bus_softc->lun_softc_list, softc, links); + + status = cam_periph_alloc(ctlferegister, + ctlfeoninvalidate, + ctlfecleanup, + ctlfestart, + "ctl", + CAM_PERIPH_BIO, + path, + ctlfeasync, + 0, + softc); + + mtx_unlock(sim->mtx); + + xpt_free_path(path); + + return (0); +} + +/* + * XXX KDM we disable LUN removal here. The problem is that the isp(4) + * driver doesn't currently handle LUN removal properly. We need to keep + * enough state here at the peripheral level even after LUNs have been + * removed inside CTL. + * + * Once the isp(4) driver is fixed, this can be re-enabled. + */ +static int +ctlfe_lun_disable(void *arg, struct ctl_id targ_id, int lun_id) +{ +#ifdef NOTYET + struct ctlfe_softc *softc; + struct ctlfe_lun_softc *lun_softc; + + softc = (struct ctlfe_softc *)arg; + + mtx_lock(softc->sim->mtx); + STAILQ_FOREACH(lun_softc, &softc->lun_softc_list, links) { + struct cam_path *path; + + path = lun_softc->periph->path; + + if ((xpt_path_target_id(path) == targ_id.id) + && (xpt_path_lun_id(path) == lun_id)) { + break; + } + } + if (lun_softc == NULL) { + mtx_unlock(softc->sim->mtx); + printf("%s: can't find target %d lun %d\n", __func__, + targ_id.id, lun_id); + return (1); + } + + cam_periph_invalidate(lun_softc->periph); + + mtx_unlock(softc->sim->mtx); +#endif + + return (0); +} + +static void +ctlfe_dump_sim(struct cam_sim *sim) +{ + int i; + + printf("%s%d: max tagged openings: %d, max dev openings: %d\n", + sim->sim_name, sim->unit_number, + sim->max_tagged_dev_openings, sim->max_dev_openings); + printf("%s%d: max_ccbs: %u, ccb_count: %u\n", + sim->sim_name, sim->unit_number, + sim->max_ccbs, sim->ccb_count); + printf("%s%d: ccb_freeq is %sempty\n", + sim->sim_name, sim->unit_number, + (SLIST_FIRST(&sim->ccb_freeq) == NULL) ? "" : "NOT "); + printf("%s%d: alloc_queue.entries %d, alloc_openings %d\n", + sim->sim_name, sim->unit_number, + sim->devq->alloc_queue.entries, sim->devq->alloc_openings); + printf("%s%d: qfrozen_cnt:", sim->sim_name, sim->unit_number); + for (i = 0; i < CAM_RL_VALUES; i++) { + printf("%s%u", (i != 0) ? ":" : "", + sim->devq->alloc_queue.qfrozen_cnt[i]); + } + printf("\n"); +} + +/* + * Assumes that the SIM lock is held. + */ +static void +ctlfe_dump_queue(struct ctlfe_lun_softc *softc) +{ + struct ccb_hdr *hdr; + struct cam_periph *periph; + int num_items; + + periph = softc->periph; + num_items = 0; + + TAILQ_FOREACH(hdr, &softc->work_queue, periph_links.tqe) { + union ctl_io *io; + + io = hdr->io_ptr; + + num_items++; + + /* + * This can happen when we get an ATIO but can't allocate + * a ctl_io. See the XPT_ACCEPT_TARGET_IO case in ctlfedone(). + */ + if (io == NULL) { + struct ccb_scsiio *csio; + + csio = (struct ccb_scsiio *)hdr; + + xpt_print(periph->path, "CCB %#x ctl_io allocation " + "failed\n", csio->tag_id); + continue; + } + + /* + * Only regular SCSI I/O is put on the work + * queue, so we can print sense here. There may be no + * sense if it's no the queue for a DMA, but this serves to + * print out the CCB as well. + * + * XXX KDM switch this over to scsi_sense_print() when + * CTL is merged in with CAM. + */ + ctl_io_error_print(io, NULL); + + /* + * We're sending status back to the + * initiator, so we're on the queue waiting + * for a CTIO to do that. + */ + if ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) + continue; + + /* + * Otherwise, we're on the queue waiting to + * do a data transfer. + */ + xpt_print(periph->path, "Total %u, Current %u, Resid %u\n", + io->scsiio.kern_total_len, io->scsiio.kern_data_len, + io->scsiio.kern_data_resid); + } + + xpt_print(periph->path, "%d requests total waiting for CCBs\n", + num_items); + xpt_print(periph->path, "%ju CCBs oustanding (%ju allocated, %ju " + "freed)\n", (uintmax_t)(softc->ccbs_alloced - + softc->ccbs_freed), (uintmax_t)softc->ccbs_alloced, + (uintmax_t)softc->ccbs_freed); + xpt_print(periph->path, "%ju CTIOs outstanding (%ju sent, %ju " + "returned\n", (uintmax_t)(softc->ctios_sent - + softc->ctios_returned), softc->ctios_sent, + softc->ctios_returned); +} + +/* + * This function is called when we fail to get a CCB for a DMA or status return + * to the initiator within the specified time period. + * + * The callout code should insure that we hold the sim mutex here. + */ +static void +ctlfe_dma_timeout(void *arg) +{ + struct ctlfe_lun_softc *softc; + struct cam_periph *periph; + struct cam_sim *sim; + int num_queued; + + softc = (struct ctlfe_lun_softc *)arg; + periph = softc->periph; + sim = xpt_path_sim(periph->path); + num_queued = 0; + + /* + * Nothing to do... + */ + if (TAILQ_FIRST(&softc->work_queue) == NULL) { + xpt_print(periph->path, "TIMEOUT triggered after %d " + "seconds, but nothing on work queue??\n", + CTLFE_DMA_TIMEOUT); + return; + } + + xpt_print(periph->path, "TIMEOUT (%d seconds) waiting for DMA to " + "start\n", CTLFE_DMA_TIMEOUT); + + ctlfe_dump_queue(softc); + + ctlfe_dump_sim(sim); + + xpt_print(periph->path, "calling xpt_schedule() to attempt to " + "unstick our queue\n"); + + xpt_schedule(periph, /*priority*/ 1); + + xpt_print(periph->path, "xpt_schedule() call complete\n"); +} + +/* + * Datamove/done routine called by CTL. Put ourselves on the queue to + * receive a CCB from CAM so we can queue the continue I/O request down + * to the adapter. + */ +static void +ctlfe_datamove_done(union ctl_io *io) +{ + union ccb *ccb; + struct cam_sim *sim; + struct cam_periph *periph; + struct ctlfe_lun_softc *softc; + + ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; + + sim = xpt_path_sim(ccb->ccb_h.path); + + mtx_lock(sim->mtx); + + periph = xpt_path_periph(ccb->ccb_h.path); + + softc = (struct ctlfe_lun_softc *)periph->softc; + + if (io->io_hdr.io_type == CTL_IO_TASK) { + /* + * Task management commands don't require any further + * communication back to the adapter. Requeue the CCB + * to the adapter, and free the CTL I/O. + */ + xpt_print(ccb->ccb_h.path, "%s: returning task I/O " + "tag %#x seq %#x\n", __func__, + ccb->cin1.tag_id, ccb->cin1.seq_id); + /* + * Send the notify acknowledge down to the SIM, to let it + * know we processed the task management command. + */ + ccb->ccb_h.status = CAM_REQ_INPROG; + ccb->ccb_h.func_code = XPT_NOTIFY_ACKNOWLEDGE; + xpt_action(ccb); + ctl_free_io(io); + } else { + if ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) + io->io_hdr.flags |= CTL_FLAG_STATUS_QUEUED; + else + io->io_hdr.flags |= CTL_FLAG_DMA_QUEUED; + + TAILQ_INSERT_TAIL(&softc->work_queue, &ccb->ccb_h, + periph_links.tqe); + + /* + * Reset the timeout for our latest active DMA. + */ + callout_reset(&softc->dma_callout, + CTLFE_DMA_TIMEOUT * hz, + ctlfe_dma_timeout, softc); + /* + * Ask for the CAM transport layer to send us a CCB to do + * the DMA or send status, unless ctlfe_dma_enabled is set + * to 0. + */ + if (ctlfe_dma_enabled != 0) + xpt_schedule(periph, /*priority*/ 1); + } + + mtx_unlock(sim->mtx); +} + +static void +ctlfe_dump(void) +{ + struct ctlfe_softc *bus_softc; + + STAILQ_FOREACH(bus_softc, &ctlfe_softc_list, links) { + struct ctlfe_lun_softc *lun_softc; + + ctlfe_dump_sim(bus_softc->sim); + + STAILQ_FOREACH(lun_softc, &bus_softc->lun_softc_list, links) { + ctlfe_dump_queue(lun_softc); + } + } +} |
