diff options
| -rw-r--r-- | drivers/block/null_blk.c | 220 |
1 files changed, 3 insertions, 217 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index ccb9975..1e1981c 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -12,7 +12,6 @@ #include <linux/slab.h> #include <linux/blk-mq.h> #include <linux/hrtimer.h> -#include <linux/lightnvm.h> #include <linux/configfs.h> #include <linux/badblocks.h> @@ -107,7 +106,6 @@ struct nullb_device { unsigned int hw_queue_depth; /* queue depth */ unsigned int index; /* index of the disk, only valid with a disk */ unsigned int mbps; /* Bandwidth throttle cap (in MB/s) */ - bool use_lightnvm; /* register as a LightNVM device */ bool blocking; /* blocking blk-mq device */ bool use_per_node_hctx; /* use per-node allocation for hardware context */ bool power; /* power on/off the device */ @@ -121,7 +119,6 @@ struct nullb { unsigned int index; struct request_queue *q; struct gendisk *disk; - struct nvm_dev *ndev; struct blk_mq_tag_set *tag_set; struct blk_mq_tag_set __tag_set; unsigned int queue_depth; @@ -139,7 +136,6 @@ static LIST_HEAD(nullb_list); static struct mutex lock; static int null_major; static DEFINE_IDA(nullb_indexes); -static struct kmem_cache *ppa_cache; static struct blk_mq_tag_set tag_set; enum { @@ -208,10 +204,6 @@ static int nr_devices = 1; module_param(nr_devices, int, S_IRUGO); MODULE_PARM_DESC(nr_devices, "Number of devices to register"); -static bool g_use_lightnvm; -module_param_named(use_lightnvm, g_use_lightnvm, bool, S_IRUGO); -MODULE_PARM_DESC(use_lightnvm, "Register as a LightNVM device"); - static bool g_blocking; module_param_named(blocking, g_blocking, bool, S_IRUGO); MODULE_PARM_DESC(blocking, "Register as a blocking blk-mq driver device"); @@ -345,7 +337,6 @@ NULLB_DEVICE_ATTR(blocksize, uint); NULLB_DEVICE_ATTR(irqmode, uint); NULLB_DEVICE_ATTR(hw_queue_depth, uint); NULLB_DEVICE_ATTR(index, uint); -NULLB_DEVICE_ATTR(use_lightnvm, bool); NULLB_DEVICE_ATTR(blocking, bool); NULLB_DEVICE_ATTR(use_per_node_hctx, bool); NULLB_DEVICE_ATTR(memory_backed, bool); @@ -455,7 +446,6 @@ static struct configfs_attribute *nullb_device_attrs[] = { &nullb_device_attr_irqmode, &nullb_device_attr_hw_queue_depth, &nullb_device_attr_index, - &nullb_device_attr_use_lightnvm, &nullb_device_attr_blocking, &nullb_device_attr_use_per_node_hctx, &nullb_device_attr_power, @@ -573,7 +563,6 @@ static struct nullb_device *null_alloc_dev(void) dev->blocksize = g_bs; dev->irqmode = g_irqmode; dev->hw_queue_depth = g_hw_queue_depth; - dev->use_lightnvm = g_use_lightnvm; dev->blocking = g_blocking; dev->use_per_node_hctx = g_use_per_node_hctx; return dev; @@ -1423,170 +1412,6 @@ static void cleanup_queues(struct nullb *nullb) kfree(nullb->queues); } -#ifdef CONFIG_NVM - -static void null_lnvm_end_io(struct request *rq, blk_status_t status) -{ - struct nvm_rq *rqd = rq->end_io_data; - - /* XXX: lighnvm core seems to expect NVM_RSP_* values here.. */ - rqd->error = status ? -EIO : 0; - nvm_end_io(rqd); - - blk_put_request(rq); -} - -static int null_lnvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) -{ - struct request_queue *q = dev->q; - struct request *rq; - struct bio *bio = rqd->bio; - - rq = blk_mq_alloc_request(q, - op_is_write(bio_op(bio)) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); - if (IS_ERR(rq)) - return -ENOMEM; - - blk_init_request_from_bio(rq, bio); - - rq->end_io_data = rqd; - - blk_execute_rq_nowait(q, NULL, rq, 0, null_lnvm_end_io); - - return 0; -} - -static int null_lnvm_id(struct nvm_dev *dev, struct nvm_id *id) -{ - struct nullb *nullb = dev->q->queuedata; - sector_t size = (sector_t)nullb->dev->size * 1024 * 1024ULL; - sector_t blksize; - struct nvm_id_group *grp; - - id->ver_id = 0x1; - id->vmnt = 0; - id->cap = 0x2; - id->dom = 0x1; - - id->ppaf.blk_offset = 0; - id->ppaf.blk_len = 16; - id->ppaf.pg_offset = 16; - id->ppaf.pg_len = 16; - id->ppaf.sect_offset = 32; - id->ppaf.sect_len = 8; - id->ppaf.pln_offset = 40; - id->ppaf.pln_len = 8; - id->ppaf.lun_offset = 48; - id->ppaf.lun_len = 8; - id->ppaf.ch_offset = 56; - id->ppaf.ch_len = 8; - - sector_div(size, nullb->dev->blocksize); /* convert size to pages */ - size >>= 8; /* concert size to pgs pr blk */ - grp = &id->grp; - grp->mtype = 0; - grp->fmtype = 0; - grp->num_ch = 1; - grp->num_pg = 256; - blksize = size; - size >>= 16; - grp->num_lun = size + 1; - sector_div(blksize, grp->num_lun); - grp->num_blk = blksize; - grp->num_pln = 1; - - grp->fpg_sz = nullb->dev->blocksize; - grp->csecs = nullb->dev->blocksize; - grp->trdt = 25000; - grp->trdm = 25000; - grp->tprt = 500000; - grp->tprm = 500000; - grp->tbet = 1500000; - grp->tbem = 1500000; - grp->mpos = 0x010101; /* single plane rwe */ - grp->cpar = nullb->dev->hw_queue_depth; - - return 0; -} - -static void *null_lnvm_create_dma_pool(struct nvm_dev *dev, char *name) -{ - mempool_t *virtmem_pool; - - virtmem_pool = mempool_create_slab_pool(64, ppa_cache); - if (!virtmem_pool) { - pr_err("null_blk: Unable to create virtual memory pool\n"); - return NULL; - } - - return virtmem_pool; -} - -static void null_lnvm_destroy_dma_pool(void *pool) -{ - mempool_destroy(pool); -} - -static void *null_lnvm_dev_dma_alloc(struct nvm_dev *dev, void *pool, - gfp_t mem_flags, dma_addr_t *dma_handler) -{ - return mempool_alloc(pool, mem_flags); -} - -static void null_lnvm_dev_dma_free(void *pool, void *entry, - dma_addr_t dma_handler) -{ - mempool_free(entry, pool); -} - -static struct nvm_dev_ops null_lnvm_dev_ops = { - .identity = null_lnvm_id, - .submit_io = null_lnvm_submit_io, - - .create_dma_pool = null_lnvm_create_dma_pool, - .destroy_dma_pool = null_lnvm_destroy_dma_pool, - .dev_dma_alloc = null_lnvm_dev_dma_alloc, - .dev_dma_free = null_lnvm_dev_dma_free, - - /* Simulate nvme protocol restriction */ - .max_phys_sect = 64, -}; - -static int null_nvm_register(struct nullb *nullb) -{ - struct nvm_dev *dev; - int rv; - - dev = nvm_alloc_dev(0); - if (!dev) - return -ENOMEM; - - dev->q = nullb->q; - memcpy(dev->name, nullb->disk_name, DISK_NAME_LEN); - dev->ops = &null_lnvm_dev_ops; - - rv = nvm_register(dev); - if (rv) { - kfree(dev); - return rv; - } - nullb->ndev = dev; - return 0; -} - -static void null_nvm_unregister(struct nullb *nullb) -{ - nvm_unregister(nullb->ndev); -} -#else -static int null_nvm_register(struct nullb *nullb) -{ - pr_err("null_blk: CONFIG_NVM needs to be enabled for LightNVM\n"); - return -EINVAL; -} -static void null_nvm_unregister(struct nullb *nullb) {} -#endif /* CONFIG_NVM */ - static void null_del_dev(struct nullb *nullb) { struct nullb_device *dev = nullb->dev; @@ -1595,10 +1420,7 @@ static void null_del_dev(struct nullb *nullb) list_del_init(&nullb->list); - if (dev->use_lightnvm) - null_nvm_unregister(nullb); - else - del_gendisk(nullb->disk); + del_gendisk(nullb->disk); if (test_bit(NULLB_DEV_FL_THROTTLED, &nullb->dev->flags)) { hrtimer_cancel(&nullb->bw_timer); @@ -1610,8 +1432,7 @@ static void null_del_dev(struct nullb *nullb) if (dev->queue_mode == NULL_Q_MQ && nullb->tag_set == &nullb->__tag_set) blk_mq_free_tag_set(nullb->tag_set); - if (!dev->use_lightnvm) - put_disk(nullb->disk); + put_disk(nullb->disk); cleanup_queues(nullb); if (null_cache_active(nullb)) null_free_device_storage(nullb->dev, true); @@ -1775,11 +1596,6 @@ static void null_validate_conf(struct nullb_device *dev) { dev->blocksize = round_down(dev->blocksize, 512); dev->blocksize = clamp_t(unsigned int, dev->blocksize, 512, 4096); - if (dev->use_lightnvm && dev->blocksize != 4096) - dev->blocksize = 4096; - - if (dev->use_lightnvm && dev->queue_mode != NULL_Q_MQ) - dev->queue_mode = NULL_Q_MQ; if (dev->queue_mode == NULL_Q_MQ && dev->use_per_node_hctx) { if (dev->submit_queues != nr_online_nodes) @@ -1895,11 +1711,7 @@ static int null_add_dev(struct nullb_device *dev) sprintf(nullb->disk_name, "nullb%d", nullb->index); - if (dev->use_lightnvm) - rv = null_nvm_register(nullb); - else - rv = null_gendisk_register(nullb); - + rv = null_gendisk_register(nullb); if (rv) goto out_cleanup_blk_queue; @@ -1938,18 +1750,6 @@ static int __init null_init(void) g_bs = PAGE_SIZE; } - if (g_use_lightnvm && g_bs != 4096) { - pr_warn("null_blk: LightNVM only supports 4k block size\n"); - pr_warn("null_blk: defaults block size to 4k\n"); - g_bs = 4096; - } - - if (g_use_lightnvm && g_queue_mode != NULL_Q_MQ) { - pr_warn("null_blk: LightNVM only supported for blk-mq\n"); - pr_warn("null_blk: defaults queue mode to blk-mq\n"); - g_queue_mode = NULL_Q_MQ; - } - if (g_queue_mode == NULL_Q_MQ && g_use_per_node_hctx) { if (g_submit_queues != nr_online_nodes) { pr_warn("null_blk: submit_queues param is set to %u.\n", @@ -1982,16 +1782,6 @@ static int __init null_init(void) goto err_conf; } - if (g_use_lightnvm) { - ppa_cache = kmem_cache_create("ppa_cache", 64 * sizeof(u64), - 0, 0, NULL); - if (!ppa_cache) { - pr_err("null_blk: unable to create ppa cache\n"); - ret = -ENOMEM; - goto err_ppa; - } - } - for (i = 0; i < nr_devices; i++) { dev = null_alloc_dev(); if (!dev) { @@ -2015,8 +1805,6 @@ err_dev: null_del_dev(nullb); null_free_dev(dev); } - kmem_cache_destroy(ppa_cache); -err_ppa: unregister_blkdev(null_major, "nullb"); err_conf: configfs_unregister_subsystem(&nullb_subsys); @@ -2047,8 +1835,6 @@ static void __exit null_exit(void) if (g_queue_mode == NULL_Q_MQ && shared_tags) blk_mq_free_tag_set(&tag_set); - - kmem_cache_destroy(ppa_cache); } module_init(null_init); |
