From: Matias Bjørling Date: Tue, 31 Jan 2017 12:17:09 +0000 (+0100) Subject: lightnvm: merge gennvm with core X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ade69e2432b795c76653e1dfa09c684549826a50;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git lightnvm: merge gennvm with core For the first iteration of Open-Channel SSDs, it was anticipated that there could be various media managers on top of an open-channel SSD, such to allow vendors to plug in their own host-side FTLs, without the media manager in between. Now that an Open-Channel SSD is exposed as a traditional block device, there is no longer a need for this. Therefore lets merge the gennvm code with core and simplify the stack. Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig index 2f5d5f4a4c75..052714106b7b 100644 --- a/drivers/lightnvm/Kconfig +++ b/drivers/lightnvm/Kconfig @@ -26,15 +26,6 @@ config NVM_DEBUG It is required to create/remove targets without IOCTLs. -config NVM_GENNVM - tristate "General Non-Volatile Memory Manager for Open-Channel SSDs" - ---help--- - Non-volatile memory media manager for Open-Channel SSDs that implements - physical media metadata management and block provisioning API. - - This is the standard media manager for using Open-Channel SSDs, and - required for targets to be instantiated. - config NVM_RRPC tristate "Round-robin Hybrid Open-Channel SSD target" ---help--- diff --git a/drivers/lightnvm/Makefile b/drivers/lightnvm/Makefile index a7a0a22cf1a5..b2a39e2d2895 100644 --- a/drivers/lightnvm/Makefile +++ b/drivers/lightnvm/Makefile @@ -2,6 +2,5 @@ # Makefile for Open-Channel SSDs. # -obj-$(CONFIG_NVM) := core.o sysblk.o -obj-$(CONFIG_NVM_GENNVM) += gennvm.o +obj-$(CONFIG_NVM) := core.o obj-$(CONFIG_NVM_RRPC) += rrpc.o diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 02240a0b39c9..e9a495650dd0 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -29,10 +29,492 @@ static LIST_HEAD(nvm_tgt_types); static DECLARE_RWSEM(nvm_tgtt_lock); -static LIST_HEAD(nvm_mgrs); static LIST_HEAD(nvm_devices); static DECLARE_RWSEM(nvm_lock); +/* Map between virtual and physical channel and lun */ +struct nvm_ch_map { + int ch_off; + int nr_luns; + int *lun_offs; +}; + +struct nvm_dev_map { + struct nvm_ch_map *chnls; + int nr_chnls; +}; + +struct nvm_area { + struct list_head list; + sector_t begin; + sector_t end; /* end is excluded */ +}; + +enum { + TRANS_TGT_TO_DEV = 0x0, + TRANS_DEV_TO_TGT = 0x1, +}; + +static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) +{ + struct nvm_target *tgt; + + list_for_each_entry(tgt, &dev->targets, list) + if (!strcmp(name, tgt->disk->disk_name)) + return tgt; + + return NULL; +} + +static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) +{ + int i; + + for (i = lun_begin; i <= lun_end; i++) { + if (test_and_set_bit(i, dev->lun_map)) { + pr_err("nvm: lun %d already allocated\n", i); + goto err; + } + } + + return 0; +err: + while (--i > lun_begin) + clear_bit(i, dev->lun_map); + + return -EBUSY; +} + +static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin, + int lun_end) +{ + int i; + + for (i = lun_begin; i <= lun_end; i++) + WARN_ON(!test_and_clear_bit(i, dev->lun_map)); +} + +static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev) +{ + struct nvm_dev *dev = tgt_dev->parent; + struct nvm_dev_map *dev_map = tgt_dev->map; + int i, j; + + for (i = 0; i < dev_map->nr_chnls; i++) { + struct nvm_ch_map *ch_map = &dev_map->chnls[i]; + int *lun_offs = ch_map->lun_offs; + int ch = i + ch_map->ch_off; + + for (j = 0; j < ch_map->nr_luns; j++) { + int lun = j + lun_offs[j]; + int lunid = (ch * dev->geo.luns_per_chnl) + lun; + + WARN_ON(!test_and_clear_bit(lunid, dev->lun_map)); + } + + kfree(ch_map->lun_offs); + } + + kfree(dev_map->chnls); + kfree(dev_map); + + kfree(tgt_dev->luns); + kfree(tgt_dev); +} + +static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, + int lun_begin, int lun_end) +{ + struct nvm_tgt_dev *tgt_dev = NULL; + struct nvm_dev_map *dev_rmap = dev->rmap; + struct nvm_dev_map *dev_map; + struct ppa_addr *luns; + int nr_luns = lun_end - lun_begin + 1; + int luns_left = nr_luns; + int nr_chnls = nr_luns / dev->geo.luns_per_chnl; + int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl; + int bch = lun_begin / dev->geo.luns_per_chnl; + int blun = lun_begin % dev->geo.luns_per_chnl; + int lunid = 0; + int lun_balanced = 1; + int prev_nr_luns; + int i, j; + + nr_chnls = nr_luns / dev->geo.luns_per_chnl; + nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; + + dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); + if (!dev_map) + goto err_dev; + + dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map), + GFP_KERNEL); + if (!dev_map->chnls) + goto err_chnls; + + luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); + if (!luns) + goto err_luns; + + prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ? + dev->geo.luns_per_chnl : luns_left; + for (i = 0; i < nr_chnls; i++) { + struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; + int *lun_roffs = ch_rmap->lun_offs; + struct nvm_ch_map *ch_map = &dev_map->chnls[i]; + int *lun_offs; + int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ? + dev->geo.luns_per_chnl : luns_left; + + if (lun_balanced && prev_nr_luns != luns_in_chnl) + lun_balanced = 0; + + ch_map->ch_off = ch_rmap->ch_off = bch; + ch_map->nr_luns = luns_in_chnl; + + lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); + if (!lun_offs) + goto err_ch; + + for (j = 0; j < luns_in_chnl; j++) { + luns[lunid].ppa = 0; + luns[lunid].g.ch = i; + luns[lunid++].g.lun = j; + + lun_offs[j] = blun; + lun_roffs[j + blun] = blun; + } + + ch_map->lun_offs = lun_offs; + + /* when starting a new channel, lun offset is reset */ + blun = 0; + luns_left -= luns_in_chnl; + } + + dev_map->nr_chnls = nr_chnls; + + tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); + if (!tgt_dev) + goto err_ch; + + memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); + /* Target device only owns a portion of the physical device */ + tgt_dev->geo.nr_chnls = nr_chnls; + tgt_dev->geo.nr_luns = nr_luns; + tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1; + tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; + tgt_dev->q = dev->q; + tgt_dev->map = dev_map; + tgt_dev->luns = luns; + memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); + + tgt_dev->parent = dev; + + return tgt_dev; +err_ch: + while (--i > 0) + kfree(dev_map->chnls[i].lun_offs); + kfree(luns); +err_luns: + kfree(dev_map->chnls); +err_chnls: + kfree(dev_map); +err_dev: + return tgt_dev; +} + +static const struct block_device_operations nvm_fops = { + .owner = THIS_MODULE, +}; + +static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) +{ + struct nvm_ioctl_create_simple *s = &create->conf.s; + struct request_queue *tqueue; + struct gendisk *tdisk; + struct nvm_tgt_type *tt; + struct nvm_target *t; + struct nvm_tgt_dev *tgt_dev; + void *targetdata; + + tt = nvm_find_target_type(create->tgttype, 1); + if (!tt) { + pr_err("nvm: target type %s not found\n", create->tgttype); + return -EINVAL; + } + + mutex_lock(&dev->mlock); + t = nvm_find_target(dev, create->tgtname); + if (t) { + pr_err("nvm: target name already exists.\n"); + mutex_unlock(&dev->mlock); + return -EINVAL; + } + mutex_unlock(&dev->mlock); + + if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end)) + return -ENOMEM; + + t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); + if (!t) + goto err_reserve; + + tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end); + if (!tgt_dev) { + pr_err("nvm: could not create target device\n"); + goto err_t; + } + + tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); + if (!tqueue) + goto err_dev; + blk_queue_make_request(tqueue, tt->make_rq); + + tdisk = alloc_disk(0); + if (!tdisk) + goto err_queue; + + sprintf(tdisk->disk_name, "%s", create->tgtname); + tdisk->flags = GENHD_FL_EXT_DEVT; + tdisk->major = 0; + tdisk->first_minor = 0; + tdisk->fops = &nvm_fops; + tdisk->queue = tqueue; + + targetdata = tt->init(tgt_dev, tdisk); + if (IS_ERR(targetdata)) + goto err_init; + + tdisk->private_data = targetdata; + tqueue->queuedata = targetdata; + + blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); + + set_capacity(tdisk, tt->capacity(targetdata)); + add_disk(tdisk); + + t->type = tt; + t->disk = tdisk; + t->dev = tgt_dev; + + mutex_lock(&dev->mlock); + list_add_tail(&t->list, &dev->targets); + mutex_unlock(&dev->mlock); + + return 0; +err_init: + put_disk(tdisk); +err_queue: + blk_cleanup_queue(tqueue); +err_dev: + kfree(tgt_dev); +err_t: + kfree(t); +err_reserve: + nvm_release_luns_err(dev, s->lun_begin, s->lun_end); + return -ENOMEM; +} + +static void __nvm_remove_target(struct nvm_target *t) +{ + struct nvm_tgt_type *tt = t->type; + struct gendisk *tdisk = t->disk; + struct request_queue *q = tdisk->queue; + + del_gendisk(tdisk); + blk_cleanup_queue(q); + + if (tt->exit) + tt->exit(tdisk->private_data); + + nvm_remove_tgt_dev(t->dev); + put_disk(tdisk); + + list_del(&t->list); + kfree(t); +} + +/** + * nvm_remove_tgt - Removes a target from the media manager + * @dev: device + * @remove: ioctl structure with target name to remove. + * + * Returns: + * 0: on success + * 1: on not found + * <0: on error + */ +static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) +{ + struct nvm_target *t; + + mutex_lock(&dev->mlock); + t = nvm_find_target(dev, remove->tgtname); + if (!t) { + mutex_unlock(&dev->mlock); + return 1; + } + __nvm_remove_target(t); + mutex_unlock(&dev->mlock); + + return 0; +} + +static int nvm_register_map(struct nvm_dev *dev) +{ + struct nvm_dev_map *rmap; + int i, j; + + rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); + if (!rmap) + goto err_rmap; + + rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map), + GFP_KERNEL); + if (!rmap->chnls) + goto err_chnls; + + for (i = 0; i < dev->geo.nr_chnls; i++) { + struct nvm_ch_map *ch_rmap; + int *lun_roffs; + int luns_in_chnl = dev->geo.luns_per_chnl; + + ch_rmap = &rmap->chnls[i]; + + ch_rmap->ch_off = -1; + ch_rmap->nr_luns = luns_in_chnl; + + lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); + if (!lun_roffs) + goto err_ch; + + for (j = 0; j < luns_in_chnl; j++) + lun_roffs[j] = -1; + + ch_rmap->lun_offs = lun_roffs; + } + + dev->rmap = rmap; + + return 0; +err_ch: + while (--i >= 0) + kfree(rmap->chnls[i].lun_offs); +err_chnls: + kfree(rmap); +err_rmap: + return -ENOMEM; +} + +static int nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) +{ + struct nvm_dev_map *dev_map = tgt_dev->map; + struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch]; + int lun_off = ch_map->lun_offs[p->g.lun]; + struct nvm_dev *dev = tgt_dev->parent; + struct nvm_dev_map *dev_rmap = dev->rmap; + struct nvm_ch_map *ch_rmap; + int lun_roff; + + p->g.ch += ch_map->ch_off; + p->g.lun += lun_off; + + ch_rmap = &dev_rmap->chnls[p->g.ch]; + lun_roff = ch_rmap->lun_offs[p->g.lun]; + + if (unlikely(ch_rmap->ch_off < 0 || lun_roff < 0)) { + pr_err("nvm: corrupted device partition table\n"); + return -EINVAL; + } + + return 0; +} + +static int nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) +{ + struct nvm_dev *dev = tgt_dev->parent; + struct nvm_dev_map *dev_rmap = dev->rmap; + struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; + int lun_roff = ch_rmap->lun_offs[p->g.lun]; + + p->g.ch -= ch_rmap->ch_off; + p->g.lun -= lun_roff; + + return 0; +} + +static int nvm_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, + int flag) +{ + int i; + int ret; + + if (rqd->nr_ppas == 1) { + if (flag == TRANS_TGT_TO_DEV) + return nvm_map_to_dev(tgt_dev, &rqd->ppa_addr); + else + return nvm_map_to_tgt(tgt_dev, &rqd->ppa_addr); + } + + for (i = 0; i < rqd->nr_ppas; i++) { + if (flag == TRANS_TGT_TO_DEV) + ret = nvm_map_to_dev(tgt_dev, &rqd->ppa_list[i]); + else + ret = nvm_map_to_tgt(tgt_dev, &rqd->ppa_list[i]); + + if (ret) + break; + } + + return ret; +} + +static struct ppa_addr nvm_trans_ppa(struct nvm_tgt_dev *tgt_dev, + struct ppa_addr p, int dir) +{ + struct ppa_addr ppa = p; + + if (dir == TRANS_TGT_TO_DEV) + nvm_map_to_dev(tgt_dev, &ppa); + else + nvm_map_to_tgt(tgt_dev, &ppa); + + return ppa; +} + +void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries, + int len) +{ + struct nvm_geo *geo = &dev->geo; + struct nvm_dev_map *dev_rmap = dev->rmap; + u64 i; + + for (i = 0; i < len; i++) { + struct nvm_ch_map *ch_rmap; + int *lun_roffs; + struct ppa_addr gaddr; + u64 pba = le64_to_cpu(entries[i]); + int off; + u64 diff; + + if (!pba) + continue; + + gaddr = linear_to_generic_addr(geo, pba); + ch_rmap = &dev_rmap->chnls[gaddr.g.ch]; + lun_roffs = ch_rmap->lun_offs; + + off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun; + + diff = ((ch_rmap->ch_off * geo->luns_per_chnl) + + (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun; + + entries[i] -= cpu_to_le64(diff); + } +} +EXPORT_SYMBOL(nvm_part_to_tgt); + struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock) { struct nvm_tgt_type *tmp, *tt = NULL; @@ -92,78 +574,6 @@ void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) } EXPORT_SYMBOL(nvm_dev_dma_free); -static struct nvmm_type *nvm_find_mgr_type(const char *name) -{ - struct nvmm_type *mt; - - list_for_each_entry(mt, &nvm_mgrs, list) - if (!strcmp(name, mt->name)) - return mt; - - return NULL; -} - -static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev) -{ - struct nvmm_type *mt; - int ret; - - lockdep_assert_held(&nvm_lock); - - list_for_each_entry(mt, &nvm_mgrs, list) { - if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN)) - continue; - - ret = mt->register_mgr(dev); - if (ret < 0) { - pr_err("nvm: media mgr failed to init (%d) on dev %s\n", - ret, dev->name); - return NULL; /* initialization failed */ - } else if (ret > 0) - return mt; - } - - return NULL; -} - -int nvm_register_mgr(struct nvmm_type *mt) -{ - struct nvm_dev *dev; - int ret = 0; - - down_write(&nvm_lock); - if (nvm_find_mgr_type(mt->name)) { - ret = -EEXIST; - goto finish; - } else { - list_add(&mt->list, &nvm_mgrs); - } - - /* try to register media mgr if any device have none configured */ - list_for_each_entry(dev, &nvm_devices, devices) { - if (dev->mt) - continue; - - dev->mt = nvm_init_mgr(dev); - } -finish: - up_write(&nvm_lock); - - return ret; -} -EXPORT_SYMBOL(nvm_register_mgr); - -void nvm_unregister_mgr(struct nvmm_type *mt) -{ - if (!mt) - return; - - down_write(&nvm_lock); - list_del(&mt->list); - up_write(&nvm_lock); -} -EXPORT_SYMBOL(nvm_unregister_mgr); - static struct nvm_dev *nvm_find_nvm_dev(const char *name) { struct nvm_dev *dev; @@ -183,13 +593,13 @@ static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev, if (rqd->nr_ppas > 1) { for (i = 0; i < rqd->nr_ppas; i++) { - rqd->ppa_list[i] = dev->mt->trans_ppa(tgt_dev, + rqd->ppa_list[i] = nvm_trans_ppa(tgt_dev, rqd->ppa_list[i], TRANS_TGT_TO_DEV); rqd->ppa_list[i] = generic_to_dev_addr(dev, rqd->ppa_list[i]); } } else { - rqd->ppa_addr = dev->mt->trans_ppa(tgt_dev, rqd->ppa_addr, + rqd->ppa_addr = nvm_trans_ppa(tgt_dev, rqd->ppa_addr, TRANS_TGT_TO_DEV); rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); } @@ -242,7 +652,7 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); nvm_free_rqd_ppalist(dev, &rqd); if (ret) { - pr_err("nvm: sysblk failed bb mark\n"); + pr_err("nvm: failed bb mark\n"); return -EINVAL; } @@ -262,15 +672,23 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) { struct nvm_dev *dev = tgt_dev->parent; - return dev->mt->submit_io(tgt_dev, rqd); + if (!dev->ops->submit_io) + return -ENODEV; + + /* Convert address space */ + nvm_generic_to_addr_mode(dev, rqd); + + rqd->dev = tgt_dev; + return dev->ops->submit_io(dev, rqd); } EXPORT_SYMBOL(nvm_submit_io); int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags) { - struct nvm_dev *dev = tgt_dev->parent; + /* Convert address space */ + nvm_map_to_dev(tgt_dev, p); - return dev->mt->erase_blk(tgt_dev, p, flags); + return nvm_erase_ppa(tgt_dev->parent, p, 1, flags); } EXPORT_SYMBOL(nvm_erase_blk); @@ -289,16 +707,65 @@ EXPORT_SYMBOL(nvm_get_l2p_tbl); int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len) { struct nvm_dev *dev = tgt_dev->parent; + struct nvm_geo *geo = &dev->geo; + struct nvm_area *area, *prev, *next; + sector_t begin = 0; + sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9; + + if (len > max_sectors) + return -EINVAL; + + area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL); + if (!area) + return -ENOMEM; + + prev = NULL; + + spin_lock(&dev->lock); + list_for_each_entry(next, &dev->area_list, list) { + if (begin + len > next->begin) { + begin = next->end; + prev = next; + continue; + } + break; + } + + if ((begin + len) > max_sectors) { + spin_unlock(&dev->lock); + kfree(area); + return -EINVAL; + } - return dev->mt->get_area(dev, lba, len); + area->begin = *lba = begin; + area->end = begin + len; + + if (prev) /* insert into sorted order */ + list_add(&area->list, &prev->list); + else + list_add(&area->list, &dev->area_list); + spin_unlock(&dev->lock); + + return 0; } EXPORT_SYMBOL(nvm_get_area); -void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba) +void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) { struct nvm_dev *dev = tgt_dev->parent; + struct nvm_area *area; - dev->mt->put_area(dev, lba); + spin_lock(&dev->lock); + list_for_each_entry(area, &dev->area_list, list) { + if (area->begin != begin) + continue; + + list_del(&area->list); + spin_unlock(&dev->lock); + kfree(area); + return; + } + spin_unlock(&dev->lock); } EXPORT_SYMBOL(nvm_put_area); @@ -409,8 +876,15 @@ EXPORT_SYMBOL(nvm_erase_ppa); void nvm_end_io(struct nvm_rq *rqd, int error) { + struct nvm_tgt_dev *tgt_dev = rqd->dev; + struct nvm_tgt_instance *ins = rqd->ins; + + /* Convert address space */ + if (tgt_dev) + nvm_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT); + rqd->error = error; - rqd->end_io(rqd); + ins->tt->end_io(rqd); } EXPORT_SYMBOL(nvm_end_io); @@ -570,10 +1044,9 @@ EXPORT_SYMBOL(nvm_get_bb_tbl); int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, u8 *blks) { - struct nvm_dev *dev = tgt_dev->parent; + ppa = nvm_trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV); - ppa = dev->mt->trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV); - return nvm_get_bb_tbl(dev, ppa, blks); + return nvm_get_bb_tbl(tgt_dev->parent, ppa, blks); } EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); @@ -691,36 +1164,31 @@ static int nvm_core_init(struct nvm_dev *dev) goto err_fmtype; } + INIT_LIST_HEAD(&dev->area_list); + INIT_LIST_HEAD(&dev->targets); mutex_init(&dev->mlock); spin_lock_init(&dev->lock); - blk_queue_logical_block_size(dev->q, geo->sec_size); + ret = nvm_register_map(dev); + if (ret) + goto err_fmtype; + blk_queue_logical_block_size(dev->q, geo->sec_size); return 0; err_fmtype: kfree(dev->lun_map); return ret; } -static void nvm_free_mgr(struct nvm_dev *dev) -{ - if (!dev->mt) - return; - - dev->mt->unregister_mgr(dev); - dev->mt = NULL; -} - void nvm_free(struct nvm_dev *dev) { if (!dev) return; - nvm_free_mgr(dev); - if (dev->dma_pool) dev->ops->destroy_dma_pool(dev->dma_pool); + kfree(dev->rmap); kfree(dev->lptbl); kfree(dev->lun_map); kfree(dev); @@ -731,9 +1199,6 @@ static int nvm_init(struct nvm_dev *dev) struct nvm_geo *geo = &dev->geo; int ret = -EINVAL; - if (!dev->q || !dev->ops) - return ret; - if (dev->ops->identity(dev, &dev->identity)) { pr_err("nvm: device could not be identified\n"); goto err; @@ -779,49 +1244,50 @@ int nvm_register(struct nvm_dev *dev) { int ret; - ret = nvm_init(dev); - if (ret) - goto err_init; + if (!dev->q || !dev->ops) + return -EINVAL; if (dev->ops->max_phys_sect > 256) { pr_info("nvm: max sectors supported is 256.\n"); - ret = -EINVAL; - goto err_init; + return -EINVAL; } if (dev->ops->max_phys_sect > 1) { dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); if (!dev->dma_pool) { pr_err("nvm: could not create dma pool\n"); - ret = -ENOMEM; - goto err_init; + return -ENOMEM; } } - if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { - ret = nvm_get_sysblock(dev, &dev->sb); - if (!ret) - pr_err("nvm: device not initialized.\n"); - else if (ret < 0) - pr_err("nvm: err (%d) on device initialization\n", ret); - } + ret = nvm_init(dev); + if (ret) + goto err_init; /* register device with a supported media manager */ down_write(&nvm_lock); - if (ret > 0) - dev->mt = nvm_init_mgr(dev); list_add(&dev->devices, &nvm_devices); up_write(&nvm_lock); return 0; err_init: - kfree(dev->lun_map); + dev->ops->destroy_dma_pool(dev->dma_pool); return ret; } EXPORT_SYMBOL(nvm_register); void nvm_unregister(struct nvm_dev *dev) { + struct nvm_target *t, *tmp; + + mutex_lock(&dev->mlock); + list_for_each_entry_safe(t, tmp, &dev->targets, list) { + if (t->dev->parent != dev) + continue; + __nvm_remove_target(t); + } + mutex_unlock(&dev->mlock); + down_write(&nvm_lock); list_del(&dev->devices); up_write(&nvm_lock); @@ -844,11 +1310,6 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create) return -EINVAL; } - if (!dev->mt) { - pr_info("nvm: device has no media manager registered.\n"); - return -ENODEV; - } - if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { pr_err("nvm: config type not valid\n"); return -EINVAL; @@ -861,7 +1322,7 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create) return -EINVAL; } - return dev->mt->create_tgt(dev, create); + return nvm_create_tgt(dev, create); } static long nvm_ioctl_info(struct file *file, void __user *arg) @@ -923,16 +1384,14 @@ static long nvm_ioctl_get_devices(struct file *file, void __user *arg) struct nvm_ioctl_device_info *info = &devices->info[i]; sprintf(info->devname, "%s", dev->name); - if (dev->mt) { - info->bmversion[0] = dev->mt->version[0]; - info->bmversion[1] = dev->mt->version[1]; - info->bmversion[2] = dev->mt->version[2]; - sprintf(info->bmname, "%s", dev->mt->name); - } else { - sprintf(info->bmname, "none"); - } + /* kept for compatibility */ + info->bmversion[0] = 1; + info->bmversion[1] = 0; + info->bmversion[2] = 0; + sprintf(info->bmname, "%s", "gennvm"); i++; + if (i > 31) { pr_err("nvm: max 31 devices can be reported.\n"); break; @@ -994,7 +1453,7 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) } list_for_each_entry(dev, &nvm_devices, devices) { - ret = dev->mt->remove_tgt(dev, &remove); + ret = nvm_remove_tgt(dev, &remove); if (!ret) break; } @@ -1002,47 +1461,7 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) return ret; } -static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) -{ - info->seqnr = 1; - info->erase_cnt = 0; - info->version = 1; -} - -static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) -{ - struct nvm_dev *dev; - struct nvm_sb_info info; - int ret; - - down_write(&nvm_lock); - dev = nvm_find_nvm_dev(init->dev); - up_write(&nvm_lock); - if (!dev) { - pr_err("nvm: device not found\n"); - return -EINVAL; - } - - nvm_setup_nvm_sb_info(&info); - - strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); - info.fs_ppa.ppa = -1; - - if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { - ret = nvm_init_sysblock(dev, &info); - if (ret) - return ret; - } - - memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); - - down_write(&nvm_lock); - dev->mt = nvm_init_mgr(dev); - up_write(&nvm_lock); - - return 0; -} - +/* kept for compatibility reasons */ static long nvm_ioctl_dev_init(struct file *file, void __user *arg) { struct nvm_ioctl_dev_init init; @@ -1058,15 +1477,13 @@ static long nvm_ioctl_dev_init(struct file *file, void __user *arg) return -EINVAL; } - init.dev[DISK_NAME_LEN - 1] = '\0'; - - return __nvm_ioctl_dev_init(&init); + return 0; } +/* Kept for compatibility reasons */ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) { struct nvm_ioctl_dev_factory fact; - struct nvm_dev *dev; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -1079,19 +1496,6 @@ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) return -EINVAL; - down_write(&nvm_lock); - dev = nvm_find_nvm_dev(fact.dev); - up_write(&nvm_lock); - if (!dev) { - pr_err("nvm: device not found\n"); - return -EINVAL; - } - - nvm_free_mgr(dev); - - if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) - return nvm_dev_factory(dev, fact.flags); - return 0; } diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c deleted file mode 100644 index ca7880082d80..000000000000 --- a/drivers/lightnvm/gennvm.c +++ /dev/null @@ -1,657 +0,0 @@ -/* - * Copyright (C) 2015 Matias Bjorling - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, - * USA. - * - * Implementation of a general nvm manager for Open-Channel SSDs. - */ - -#include "gennvm.h" - -static struct nvm_target *gen_find_target(struct gen_dev *gn, const char *name) -{ - struct nvm_target *tgt; - - list_for_each_entry(tgt, &gn->targets, list) - if (!strcmp(name, tgt->disk->disk_name)) - return tgt; - - return NULL; -} - -static const struct block_device_operations gen_fops = { - .owner = THIS_MODULE, -}; - -static int gen_reserve_luns(struct nvm_dev *dev, struct nvm_target *t, - int lun_begin, int lun_end) -{ - int i; - - for (i = lun_begin; i <= lun_end; i++) { - if (test_and_set_bit(i, dev->lun_map)) { - pr_err("nvm: lun %d already allocated\n", i); - goto err; - } - } - - return 0; - -err: - while (--i > lun_begin) - clear_bit(i, dev->lun_map); - - return -EBUSY; -} - -static void gen_release_luns_err(struct nvm_dev *dev, int lun_begin, - int lun_end) -{ - int i; - - for (i = lun_begin; i <= lun_end; i++) - WARN_ON(!test_and_clear_bit(i, dev->lun_map)); -} - -static void gen_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev) -{ - struct nvm_dev *dev = tgt_dev->parent; - struct gen_dev_map *dev_map = tgt_dev->map; - int i, j; - - for (i = 0; i < dev_map->nr_chnls; i++) { - struct gen_ch_map *ch_map = &dev_map->chnls[i]; - int *lun_offs = ch_map->lun_offs; - int ch = i + ch_map->ch_off; - - for (j = 0; j < ch_map->nr_luns; j++) { - int lun = j + lun_offs[j]; - int lunid = (ch * dev->geo.luns_per_chnl) + lun; - - WARN_ON(!test_and_clear_bit(lunid, dev->lun_map)); - } - - kfree(ch_map->lun_offs); - } - - kfree(dev_map->chnls); - kfree(dev_map); - kfree(tgt_dev->luns); - kfree(tgt_dev); -} - -static struct nvm_tgt_dev *gen_create_tgt_dev(struct nvm_dev *dev, - int lun_begin, int lun_end) -{ - struct nvm_tgt_dev *tgt_dev = NULL; - struct gen_dev_map *dev_rmap = dev->rmap; - struct gen_dev_map *dev_map; - struct ppa_addr *luns; - int nr_luns = lun_end - lun_begin + 1; - int luns_left = nr_luns; - int nr_chnls = nr_luns / dev->geo.luns_per_chnl; - int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl; - int bch = lun_begin / dev->geo.luns_per_chnl; - int blun = lun_begin % dev->geo.luns_per_chnl; - int lunid = 0; - int lun_balanced = 1; - int prev_nr_luns; - int i, j; - - nr_chnls = nr_luns / dev->geo.luns_per_chnl; - nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; - - dev_map = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL); - if (!dev_map) - goto err_dev; - - dev_map->chnls = kcalloc(nr_chnls, sizeof(struct gen_ch_map), - GFP_KERNEL); - if (!dev_map->chnls) - goto err_chnls; - - luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); - if (!luns) - goto err_luns; - - prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ? - dev->geo.luns_per_chnl : luns_left; - for (i = 0; i < nr_chnls; i++) { - struct gen_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; - int *lun_roffs = ch_rmap->lun_offs; - struct gen_ch_map *ch_map = &dev_map->chnls[i]; - int *lun_offs; - int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ? - dev->geo.luns_per_chnl : luns_left; - - if (lun_balanced && prev_nr_luns != luns_in_chnl) - lun_balanced = 0; - - ch_map->ch_off = ch_rmap->ch_off = bch; - ch_map->nr_luns = luns_in_chnl; - - lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); - if (!lun_offs) - goto err_ch; - - for (j = 0; j < luns_in_chnl; j++) { - luns[lunid].ppa = 0; - luns[lunid].g.ch = i; - luns[lunid++].g.lun = j; - - lun_offs[j] = blun; - lun_roffs[j + blun] = blun; - } - - ch_map->lun_offs = lun_offs; - - /* when starting a new channel, lun offset is reset */ - blun = 0; - luns_left -= luns_in_chnl; - } - - dev_map->nr_chnls = nr_chnls; - - tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); - if (!tgt_dev) - goto err_ch; - - memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); - /* Target device only owns a portion of the physical device */ - tgt_dev->geo.nr_chnls = nr_chnls; - tgt_dev->geo.nr_luns = nr_luns; - tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1; - tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; - tgt_dev->q = dev->q; - tgt_dev->map = dev_map; - tgt_dev->luns = luns; - memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); - - tgt_dev->parent = dev; - - return tgt_dev; -err_ch: - while (--i > 0) - kfree(dev_map->chnls[i].lun_offs); - kfree(luns); -err_luns: - kfree(dev_map->chnls); -err_chnls: - kfree(dev_map); -err_dev: - return tgt_dev; -} - -static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) -{ - struct gen_dev *gn = dev->mp; - struct nvm_ioctl_create_simple *s = &create->conf.s; - struct request_queue *tqueue; - struct gendisk *tdisk; - struct nvm_tgt_type *tt; - struct nvm_target *t; - struct nvm_tgt_dev *tgt_dev; - void *targetdata; - - tt = nvm_find_target_type(create->tgttype, 1); - if (!tt) { - pr_err("nvm: target type %s not found\n", create->tgttype); - return -EINVAL; - } - - mutex_lock(&gn->lock); - t = gen_find_target(gn, create->tgtname); - if (t) { - pr_err("nvm: target name already exists.\n"); - mutex_unlock(&gn->lock); - return -EINVAL; - } - mutex_unlock(&gn->lock); - - t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); - if (!t) - return -ENOMEM; - - if (gen_reserve_luns(dev, t, s->lun_begin, s->lun_end)) - goto err_t; - - tgt_dev = gen_create_tgt_dev(dev, s->lun_begin, s->lun_end); - if (!tgt_dev) { - pr_err("nvm: could not create target device\n"); - goto err_reserve; - } - - tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); - if (!tqueue) - goto err_dev; - blk_queue_make_request(tqueue, tt->make_rq); - - tdisk = alloc_disk(0); - if (!tdisk) - goto err_queue; - - sprintf(tdisk->disk_name, "%s", create->tgtname); - tdisk->flags = GENHD_FL_EXT_DEVT; - tdisk->major = 0; - tdisk->first_minor = 0; - tdisk->fops = &gen_fops; - tdisk->queue = tqueue; - - targetdata = tt->init(tgt_dev, tdisk); - if (IS_ERR(targetdata)) - goto err_init; - - tdisk->private_data = targetdata; - tqueue->queuedata = targetdata; - - blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); - - set_capacity(tdisk, tt->capacity(targetdata)); - add_disk(tdisk); - - t->type = tt; - t->disk = tdisk; - t->dev = tgt_dev; - - mutex_lock(&gn->lock); - list_add_tail(&t->list, &gn->targets); - mutex_unlock(&gn->lock); - - return 0; -err_init: - put_disk(tdisk); -err_queue: - blk_cleanup_queue(tqueue); -err_dev: - kfree(tgt_dev); -err_reserve: - gen_release_luns_err(dev, s->lun_begin, s->lun_end); -err_t: - kfree(t); - return -ENOMEM; -} - -static void __gen_remove_target(struct nvm_target *t) -{ - struct nvm_tgt_type *tt = t->type; - struct gendisk *tdisk = t->disk; - struct request_queue *q = tdisk->queue; - - del_gendisk(tdisk); - blk_cleanup_queue(q); - - if (tt->exit) - tt->exit(tdisk->private_data); - - gen_remove_tgt_dev(t->dev); - put_disk(tdisk); - - list_del(&t->list); - kfree(t); -} - -/** - * gen_remove_tgt - Removes a target from the media manager - * @dev: device - * @remove: ioctl structure with target name to remove. - * - * Returns: - * 0: on success - * 1: on not found - * <0: on error - */ -static int gen_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) -{ - struct gen_dev *gn = dev->mp; - struct nvm_target *t; - - if (!gn) - return 1; - - mutex_lock(&gn->lock); - t = gen_find_target(gn, remove->tgtname); - if (!t) { - mutex_unlock(&gn->lock); - return 1; - } - __gen_remove_target(t); - mutex_unlock(&gn->lock); - - return 0; -} - -static int gen_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len) -{ - struct nvm_geo *geo = &dev->geo; - struct gen_dev *gn = dev->mp; - struct gen_area *area, *prev, *next; - sector_t begin = 0; - sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9; - - if (len > max_sectors) - return -EINVAL; - - area = kmalloc(sizeof(struct gen_area), GFP_KERNEL); - if (!area) - return -ENOMEM; - - prev = NULL; - - spin_lock(&dev->lock); - list_for_each_entry(next, &gn->area_list, list) { - if (begin + len > next->begin) { - begin = next->end; - prev = next; - continue; - } - break; - } - - if ((begin + len) > max_sectors) { - spin_unlock(&dev->lock); - kfree(area); - return -EINVAL; - } - - area->begin = *lba = begin; - area->end = begin + len; - - if (prev) /* insert into sorted order */ - list_add(&area->list, &prev->list); - else - list_add(&area->list, &gn->area_list); - spin_unlock(&dev->lock); - - return 0; -} - -static void gen_put_area(struct nvm_dev *dev, sector_t begin) -{ - struct gen_dev *gn = dev->mp; - struct gen_area *area; - - spin_lock(&dev->lock); - list_for_each_entry(area, &gn->area_list, list) { - if (area->begin != begin) - continue; - - list_del(&area->list); - spin_unlock(&dev->lock); - kfree(area); - return; - } - spin_unlock(&dev->lock); -} - -static void gen_free(struct nvm_dev *dev) -{ - kfree(dev->mp); - kfree(dev->rmap); - dev->mp = NULL; -} - -static int gen_register(struct nvm_dev *dev) -{ - struct gen_dev *gn; - struct gen_dev_map *dev_rmap; - int i, j; - - if (!try_module_get(THIS_MODULE)) - return -ENODEV; - - gn = kzalloc(sizeof(struct gen_dev), GFP_KERNEL); - if (!gn) - goto err_gn; - - dev_rmap = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL); - if (!dev_rmap) - goto err_rmap; - - dev_rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct gen_ch_map), - GFP_KERNEL); - if (!dev_rmap->chnls) - goto err_chnls; - - for (i = 0; i < dev->geo.nr_chnls; i++) { - struct gen_ch_map *ch_rmap; - int *lun_roffs; - int luns_in_chnl = dev->geo.luns_per_chnl; - - ch_rmap = &dev_rmap->chnls[i]; - - ch_rmap->ch_off = -1; - ch_rmap->nr_luns = luns_in_chnl; - - lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); - if (!lun_roffs) - goto err_ch; - - for (j = 0; j < luns_in_chnl; j++) - lun_roffs[j] = -1; - - ch_rmap->lun_offs = lun_roffs; - } - - gn->dev = dev; - gn->nr_luns = dev->geo.nr_luns; - INIT_LIST_HEAD(&gn->area_list); - mutex_init(&gn->lock); - INIT_LIST_HEAD(&gn->targets); - dev->mp = gn; - dev->rmap = dev_rmap; - - return 1; -err_ch: - while (--i >= 0) - kfree(dev_rmap->chnls[i].lun_offs); -err_chnls: - kfree(dev_rmap); -err_rmap: - gen_free(dev); -err_gn: - module_put(THIS_MODULE); - return -ENOMEM; -} - -static void gen_unregister(struct nvm_dev *dev) -{ - struct gen_dev *gn = dev->mp; - struct nvm_target *t, *tmp; - - mutex_lock(&gn->lock); - list_for_each_entry_safe(t, tmp, &gn->targets, list) { - if (t->dev->parent != dev) - continue; - __gen_remove_target(t); - } - mutex_unlock(&gn->lock); - - gen_free(dev); - module_put(THIS_MODULE); -} - -static int gen_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) -{ - struct gen_dev_map *dev_map = tgt_dev->map; - struct gen_ch_map *ch_map = &dev_map->chnls[p->g.ch]; - int lun_off = ch_map->lun_offs[p->g.lun]; - struct nvm_dev *dev = tgt_dev->parent; - struct gen_dev_map *dev_rmap = dev->rmap; - struct gen_ch_map *ch_rmap; - int lun_roff; - - p->g.ch += ch_map->ch_off; - p->g.lun += lun_off; - - ch_rmap = &dev_rmap->chnls[p->g.ch]; - lun_roff = ch_rmap->lun_offs[p->g.lun]; - - if (unlikely(ch_rmap->ch_off < 0 || lun_roff < 0)) { - pr_err("nvm: corrupted device partition table\n"); - return -EINVAL; - } - - return 0; -} - -static int gen_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) -{ - struct nvm_dev *dev = tgt_dev->parent; - struct gen_dev_map *dev_rmap = dev->rmap; - struct gen_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; - int lun_roff = ch_rmap->lun_offs[p->g.lun]; - - p->g.ch -= ch_rmap->ch_off; - p->g.lun -= lun_roff; - - return 0; -} - -static int gen_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, - int flag) -{ - gen_trans_fn *f; - int i; - int ret = 0; - - f = (flag == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt; - - if (rqd->nr_ppas == 1) - return f(tgt_dev, &rqd->ppa_addr); - - for (i = 0; i < rqd->nr_ppas; i++) { - ret = f(tgt_dev, &rqd->ppa_list[i]); - if (ret) - goto out; - } - -out: - return ret; -} - -static void gen_end_io(struct nvm_rq *rqd) -{ - struct nvm_tgt_dev *tgt_dev = rqd->dev; - struct nvm_tgt_instance *ins = rqd->ins; - - /* Convert address space */ - if (tgt_dev) - gen_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT); - - ins->tt->end_io(rqd); -} - -static int gen_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) -{ - struct nvm_dev *dev = tgt_dev->parent; - - if (!dev->ops->submit_io) - return -ENODEV; - - /* Convert address space */ - gen_trans_rq(tgt_dev, rqd, TRANS_TGT_TO_DEV); - nvm_generic_to_addr_mode(dev, rqd); - - rqd->dev = tgt_dev; - rqd->end_io = gen_end_io; - return dev->ops->submit_io(dev, rqd); -} - -static int gen_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, - int flags) -{ - /* Convert address space */ - gen_map_to_dev(tgt_dev, p); - - return nvm_erase_ppa(tgt_dev->parent, p, 1, flags); -} - -static struct ppa_addr gen_trans_ppa(struct nvm_tgt_dev *tgt_dev, - struct ppa_addr p, int direction) -{ - gen_trans_fn *f; - struct ppa_addr ppa = p; - - f = (direction == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt; - f(tgt_dev, &ppa); - - return ppa; -} - -static void gen_part_to_tgt(struct nvm_dev *dev, sector_t *entries, - int len) -{ - struct nvm_geo *geo = &dev->geo; - struct gen_dev_map *dev_rmap = dev->rmap; - u64 i; - - for (i = 0; i < len; i++) { - struct gen_ch_map *ch_rmap; - int *lun_roffs; - struct ppa_addr gaddr; - u64 pba = le64_to_cpu(entries[i]); - int off; - u64 diff; - - if (!pba) - continue; - - gaddr = linear_to_generic_addr(geo, pba); - ch_rmap = &dev_rmap->chnls[gaddr.g.ch]; - lun_roffs = ch_rmap->lun_offs; - - off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun; - - diff = ((ch_rmap->ch_off * geo->luns_per_chnl) + - (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun; - - entries[i] -= cpu_to_le64(diff); - } -} - -static struct nvmm_type gen = { - .name = "gennvm", - .version = {0, 1, 0}, - - .register_mgr = gen_register, - .unregister_mgr = gen_unregister, - - .create_tgt = gen_create_tgt, - .remove_tgt = gen_remove_tgt, - - .submit_io = gen_submit_io, - .erase_blk = gen_erase_blk, - - .get_area = gen_get_area, - .put_area = gen_put_area, - - .trans_ppa = gen_trans_ppa, - .part_to_tgt = gen_part_to_tgt, -}; - -static int __init gen_module_init(void) -{ - return nvm_register_mgr(&gen); -} - -static void gen_module_exit(void) -{ - nvm_unregister_mgr(&gen); -} - -module_init(gen_module_init); -module_exit(gen_module_exit); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("General media manager for Open-Channel SSDs"); diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h deleted file mode 100644 index 6a4b3f368848..000000000000 --- a/drivers/lightnvm/gennvm.h +++ /dev/null @@ -1,62 +0,0 @@ -/* - * Copyright: Matias Bjorling - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - */ - -#ifndef GENNVM_H_ -#define GENNVM_H_ - -#include -#include - -#include - -struct gen_dev { - struct nvm_dev *dev; - - int nr_luns; - struct list_head area_list; - - struct mutex lock; - struct list_head targets; -}; - -/* Map between virtual and physical channel and lun */ -struct gen_ch_map { - int ch_off; - int nr_luns; - int *lun_offs; -}; - -struct gen_dev_map { - struct gen_ch_map *chnls; - int nr_chnls; -}; - -struct gen_area { - struct list_head list; - sector_t begin; - sector_t end; /* end is excluded */ -}; - -static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map) -{ - return ch_map + 1; -} - -typedef int (gen_trans_fn)(struct nvm_tgt_dev *, struct ppa_addr *); - -#define gen_for_each_lun(bm, lun, i) \ - for ((i) = 0, lun = &(bm)->luns[0]; \ - (i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)]) - -#endif /* GENNVM_H_ */ diff --git a/drivers/lightnvm/sysblk.c b/drivers/lightnvm/sysblk.c deleted file mode 100644 index 12002bf4efc2..000000000000 --- a/drivers/lightnvm/sysblk.c +++ /dev/null @@ -1,733 +0,0 @@ -/* - * Copyright (C) 2015 Matias Bjorling. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, - * USA. - * - */ - -#include - -#define MAX_SYSBLKS 3 /* remember to update mapping scheme on change */ -#define MAX_BLKS_PR_SYSBLK 2 /* 2 blks with 256 pages and 3000 erases - * enables ~1.5M updates per sysblk unit - */ - -struct sysblk_scan { - /* A row is a collection of flash blocks for a system block. */ - int nr_rows; - int row; - int act_blk[MAX_SYSBLKS]; - - int nr_ppas; - struct ppa_addr ppas[MAX_SYSBLKS * MAX_BLKS_PR_SYSBLK];/* all sysblks */ -}; - -static inline int scan_ppa_idx(int row, int blkid) -{ - return (row * MAX_BLKS_PR_SYSBLK) + blkid; -} - -static void nvm_sysblk_to_cpu(struct nvm_sb_info *info, - struct nvm_system_block *sb) -{ - info->seqnr = be32_to_cpu(sb->seqnr); - info->erase_cnt = be32_to_cpu(sb->erase_cnt); - info->version = be16_to_cpu(sb->version); - strncpy(info->mmtype, sb->mmtype, NVM_MMTYPE_LEN); - info->fs_ppa.ppa = be64_to_cpu(sb->fs_ppa); -} - -static void nvm_cpu_to_sysblk(struct nvm_system_block *sb, - struct nvm_sb_info *info) -{ - sb->magic = cpu_to_be32(NVM_SYSBLK_MAGIC); - sb->seqnr = cpu_to_be32(info->seqnr); - sb->erase_cnt = cpu_to_be32(info->erase_cnt); - sb->version = cpu_to_be16(info->version); - strncpy(sb->mmtype, info->mmtype, NVM_MMTYPE_LEN); - sb->fs_ppa = cpu_to_be64(info->fs_ppa.ppa); -} - -static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas) -{ - struct nvm_geo *geo = &dev->geo; - int nr_rows = min_t(int, MAX_SYSBLKS, geo->nr_chnls); - int i; - - for (i = 0; i < nr_rows; i++) - sysblk_ppas[i].ppa = 0; - - /* if possible, place sysblk at first channel, middle channel and last - * channel of the device. If not, create only one or two sys blocks - */ - switch (geo->nr_chnls) { - case 2: - sysblk_ppas[1].g.ch = 1; - /* fall-through */ - case 1: - sysblk_ppas[0].g.ch = 0; - break; - default: - sysblk_ppas[0].g.ch = 0; - sysblk_ppas[1].g.ch = geo->nr_chnls / 2; - sysblk_ppas[2].g.ch = geo->nr_chnls - 1; - break; - } - - return nr_rows; -} - -static void nvm_setup_sysblk_scan(struct nvm_dev *dev, struct sysblk_scan *s, - struct ppa_addr *sysblk_ppas) -{ - memset(s, 0, sizeof(struct sysblk_scan)); - s->nr_rows = nvm_setup_sysblks(dev, sysblk_ppas); -} - -static int sysblk_get_free_blks(struct nvm_dev *dev, struct ppa_addr ppa, - u8 *blks, int nr_blks, - struct sysblk_scan *s) -{ - struct ppa_addr *sppa; - int i, blkid = 0; - - nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); - if (nr_blks < 0) - return nr_blks; - - for (i = 0; i < nr_blks; i++) { - if (blks[i] == NVM_BLK_T_HOST) - return -EEXIST; - - if (blks[i] != NVM_BLK_T_FREE) - continue; - - sppa = &s->ppas[scan_ppa_idx(s->row, blkid)]; - sppa->g.ch = ppa.g.ch; - sppa->g.lun = ppa.g.lun; - sppa->g.blk = i; - s->nr_ppas++; - blkid++; - - pr_debug("nvm: use (%u %u %u) as sysblk\n", - sppa->g.ch, sppa->g.lun, sppa->g.blk); - if (blkid > MAX_BLKS_PR_SYSBLK - 1) - return 0; - } - - pr_err("nvm: sysblk failed get sysblk\n"); - return -EINVAL; -} - -static int sysblk_get_host_blks(struct nvm_dev *dev, struct ppa_addr ppa, - u8 *blks, int nr_blks, - struct sysblk_scan *s) -{ - int i, nr_sysblk = 0; - - nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); - if (nr_blks < 0) - return nr_blks; - - for (i = 0; i < nr_blks; i++) { - if (blks[i] != NVM_BLK_T_HOST) - continue; - - if (s->nr_ppas == MAX_BLKS_PR_SYSBLK * MAX_SYSBLKS) { - pr_err("nvm: too many host blks\n"); - return -EINVAL; - } - - ppa.g.blk = i; - - s->ppas[scan_ppa_idx(s->row, nr_sysblk)] = ppa; - s->nr_ppas++; - nr_sysblk++; - } - - return 0; -} - -static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s, - struct ppa_addr *ppas, int get_free) -{ - struct nvm_geo *geo = &dev->geo; - int i, nr_blks, ret = 0; - u8 *blks; - - s->nr_ppas = 0; - nr_blks = geo->blks_per_lun * geo->plane_mode; - - blks = kmalloc(nr_blks, GFP_KERNEL); - if (!blks) - return -ENOMEM; - - for (i = 0; i < s->nr_rows; i++) { - s->row = i; - - ret = nvm_get_bb_tbl(dev, ppas[i], blks); - if (ret) { - pr_err("nvm: failed bb tbl for ppa (%u %u)\n", - ppas[i].g.ch, - ppas[i].g.blk); - goto err_get; - } - - if (get_free) - ret = sysblk_get_free_blks(dev, ppas[i], blks, nr_blks, - s); - else - ret = sysblk_get_host_blks(dev, ppas[i], blks, nr_blks, - s); - - if (ret) - goto err_get; - } - -err_get: - kfree(blks); - return ret; -} - -/* - * scans a block for latest sysblk. - * Returns: - * 0 - newer sysblk not found. PPA is updated to latest page. - * 1 - newer sysblk found and stored in *cur. PPA is updated to - * next valid page. - * <0- error. - */ -static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa, - struct nvm_system_block *sblk) -{ - struct nvm_geo *geo = &dev->geo; - struct nvm_system_block *cur; - int pg, ret, found = 0; - - /* the full buffer for a flash page is allocated. Only the first of it - * contains the system block information - */ - cur = kmalloc(geo->pfpg_size, GFP_KERNEL); - if (!cur) - return -ENOMEM; - - /* perform linear scan through the block */ - for (pg = 0; pg < dev->lps_per_blk; pg++) { - ppa->g.pg = ppa_to_slc(dev, pg); - - ret = nvm_submit_ppa(dev, ppa, 1, NVM_OP_PREAD, NVM_IO_SLC_MODE, - cur, geo->pfpg_size); - if (ret) { - if (ret == NVM_RSP_ERR_EMPTYPAGE) { - pr_debug("nvm: sysblk scan empty ppa (%u %u %u %u)\n", - ppa->g.ch, - ppa->g.lun, - ppa->g.blk, - ppa->g.pg); - break; - } - pr_err("nvm: read failed (%x) for ppa (%u %u %u %u)", - ret, - ppa->g.ch, - ppa->g.lun, - ppa->g.blk, - ppa->g.pg); - break; /* if we can't read a page, continue to the - * next blk - */ - } - - if (be32_to_cpu(cur->magic) != NVM_SYSBLK_MAGIC) { - pr_debug("nvm: scan break for ppa (%u %u %u %u)\n", - ppa->g.ch, - ppa->g.lun, - ppa->g.blk, - ppa->g.pg); - break; /* last valid page already found */ - } - - if (be32_to_cpu(cur->seqnr) < be32_to_cpu(sblk->seqnr)) - continue; - - memcpy(sblk, cur, sizeof(struct nvm_system_block)); - found = 1; - } - - kfree(cur); - - return found; -} - -static int nvm_sysblk_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, - int type) -{ - return nvm_set_bb_tbl(dev, s->ppas, s->nr_ppas, type); -} - -static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info, - struct sysblk_scan *s) -{ - struct nvm_geo *geo = &dev->geo; - struct nvm_system_block nvmsb; - void *buf; - int i, sect, ret = 0; - struct ppa_addr *ppas; - - nvm_cpu_to_sysblk(&nvmsb, info); - - buf = kzalloc(geo->pfpg_size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - memcpy(buf, &nvmsb, sizeof(struct nvm_system_block)); - - ppas = kcalloc(geo->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL); - if (!ppas) { - ret = -ENOMEM; - goto err; - } - - /* Write and verify */ - for (i = 0; i < s->nr_rows; i++) { - ppas[0] = s->ppas[scan_ppa_idx(i, s->act_blk[i])]; - - pr_debug("nvm: writing sysblk to ppa (%u %u %u %u)\n", - ppas[0].g.ch, - ppas[0].g.lun, - ppas[0].g.blk, - ppas[0].g.pg); - - /* Expand to all sectors within a flash page */ - if (geo->sec_per_pg > 1) { - for (sect = 1; sect < geo->sec_per_pg; sect++) { - ppas[sect].ppa = ppas[0].ppa; - ppas[sect].g.sec = sect; - } - } - - ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PWRITE, - NVM_IO_SLC_MODE, buf, geo->pfpg_size); - if (ret) { - pr_err("nvm: sysblk failed program (%u %u %u)\n", - ppas[0].g.ch, - ppas[0].g.lun, - ppas[0].g.blk); - break; - } - - ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PREAD, - NVM_IO_SLC_MODE, buf, geo->pfpg_size); - if (ret) { - pr_err("nvm: sysblk failed read (%u %u %u)\n", - ppas[0].g.ch, - ppas[0].g.lun, - ppas[0].g.blk); - break; - } - - if (memcmp(buf, &nvmsb, sizeof(struct nvm_system_block))) { - pr_err("nvm: sysblk failed verify (%u %u %u)\n", - ppas[0].g.ch, - ppas[0].g.lun, - ppas[0].g.blk); - ret = -EINVAL; - break; - } - } - - kfree(ppas); -err: - kfree(buf); - - return ret; -} - -static int nvm_prepare_new_sysblks(struct nvm_dev *dev, struct sysblk_scan *s) -{ - int i, ret; - unsigned long nxt_blk; - struct ppa_addr *ppa; - - for (i = 0; i < s->nr_rows; i++) { - nxt_blk = (s->act_blk[i] + 1) % MAX_BLKS_PR_SYSBLK; - ppa = &s->ppas[scan_ppa_idx(i, nxt_blk)]; - ppa->g.pg = ppa_to_slc(dev, 0); - - ret = nvm_erase_ppa(dev, ppa, 1, 0); - if (ret) - return ret; - - s->act_blk[i] = nxt_blk; - } - - return 0; -} - -int nvm_get_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) -{ - struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; - struct sysblk_scan s; - struct nvm_system_block *cur; - int i, j, found = 0; - int ret = -ENOMEM; - - /* - * 1. setup sysblk locations - * 2. get bad block list - * 3. filter on host-specific (type 3) - * 4. iterate through all and find the highest seq nr. - * 5. return superblock information - */ - - if (!dev->ops->get_bb_tbl) - return -EINVAL; - - nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); - - mutex_lock(&dev->mlock); - ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); - if (ret) - goto err_sysblk; - - /* no sysblocks initialized */ - if (!s.nr_ppas) - goto err_sysblk; - - cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); - if (!cur) - goto err_sysblk; - - /* find the latest block across all sysblocks */ - for (i = 0; i < s.nr_rows; i++) { - for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { - struct ppa_addr ppa = s.ppas[scan_ppa_idx(i, j)]; - - ret = nvm_scan_block(dev, &ppa, cur); - if (ret > 0) - found = 1; - else if (ret < 0) - break; - } - } - - nvm_sysblk_to_cpu(info, cur); - - kfree(cur); -err_sysblk: - mutex_unlock(&dev->mlock); - - if (found) - return 1; - return ret; -} - -int nvm_update_sysblock(struct nvm_dev *dev, struct nvm_sb_info *new) -{ - /* 1. for each latest superblock - * 2. if room - * a. write new flash page entry with the updated information - * 3. if no room - * a. find next available block on lun (linear search) - * if none, continue to next lun - * if none at all, report error. also report that it wasn't - * possible to write to all superblocks. - * c. write data to block. - */ - struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; - struct sysblk_scan s; - struct nvm_system_block *cur; - int i, j, ppaidx, found = 0; - int ret = -ENOMEM; - - if (!dev->ops->get_bb_tbl) - return -EINVAL; - - nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); - - mutex_lock(&dev->mlock); - ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); - if (ret) - goto err_sysblk; - - cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); - if (!cur) - goto err_sysblk; - - /* Get the latest sysblk for each sysblk row */ - for (i = 0; i < s.nr_rows; i++) { - found = 0; - for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { - ppaidx = scan_ppa_idx(i, j); - ret = nvm_scan_block(dev, &s.ppas[ppaidx], cur); - if (ret > 0) { - s.act_blk[i] = j; - found = 1; - } else if (ret < 0) - break; - } - } - - if (!found) { - pr_err("nvm: no valid sysblks found to update\n"); - ret = -EINVAL; - goto err_cur; - } - - /* - * All sysblocks found. Check that they have same page id in their flash - * blocks - */ - for (i = 1; i < s.nr_rows; i++) { - struct ppa_addr l = s.ppas[scan_ppa_idx(0, s.act_blk[0])]; - struct ppa_addr r = s.ppas[scan_ppa_idx(i, s.act_blk[i])]; - - if (l.g.pg != r.g.pg) { - pr_err("nvm: sysblks not on same page. Previous update failed.\n"); - ret = -EINVAL; - goto err_cur; - } - } - - /* - * Check that there haven't been another update to the seqnr since we - * began - */ - if ((new->seqnr - 1) != be32_to_cpu(cur->seqnr)) { - pr_err("nvm: seq is not sequential\n"); - ret = -EINVAL; - goto err_cur; - } - - /* - * When all pages in a block has been written, a new block is selected - * and writing is performed on the new block. - */ - if (s.ppas[scan_ppa_idx(0, s.act_blk[0])].g.pg == - dev->lps_per_blk - 1) { - ret = nvm_prepare_new_sysblks(dev, &s); - if (ret) - goto err_cur; - } - - ret = nvm_write_and_verify(dev, new, &s); -err_cur: - kfree(cur); -err_sysblk: - mutex_unlock(&dev->mlock); - - return ret; -} - -int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) -{ - struct nvm_geo *geo = &dev->geo; - struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; - struct sysblk_scan s; - int ret; - - /* - * 1. select master blocks and select first available blks - * 2. get bad block list - * 3. mark MAX_SYSBLKS block as host-based device allocated. - * 4. write and verify data to block - */ - - if (!dev->ops->get_bb_tbl || !dev->ops->set_bb_tbl) - return -EINVAL; - - if (!(geo->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) { - pr_err("nvm: memory does not support SLC access\n"); - return -EINVAL; - } - - /* Index all sysblocks and mark them as host-driven */ - nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); - - mutex_lock(&dev->mlock); - ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 1); - if (ret) - goto err_mark; - - ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_HOST); - if (ret) - goto err_mark; - - /* Write to the first block of each row */ - ret = nvm_write_and_verify(dev, info, &s); -err_mark: - mutex_unlock(&dev->mlock); - return ret; -} - -static int factory_nblks(int nblks) -{ - /* Round up to nearest BITS_PER_LONG */ - return (nblks + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1); -} - -static unsigned int factory_blk_offset(struct nvm_geo *geo, struct ppa_addr ppa) -{ - int nblks = factory_nblks(geo->blks_per_lun); - - return ((ppa.g.ch * geo->luns_per_chnl * nblks) + (ppa.g.lun * nblks)) / - BITS_PER_LONG; -} - -static int nvm_factory_blks(struct nvm_dev *dev, struct ppa_addr ppa, - u8 *blks, int nr_blks, - unsigned long *blk_bitmap, int flags) -{ - int i, lunoff; - - nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); - if (nr_blks < 0) - return nr_blks; - - lunoff = factory_blk_offset(&dev->geo, ppa); - - /* non-set bits correspond to the block must be erased */ - for (i = 0; i < nr_blks; i++) { - switch (blks[i]) { - case NVM_BLK_T_FREE: - if (flags & NVM_FACTORY_ERASE_ONLY_USER) - set_bit(i, &blk_bitmap[lunoff]); - break; - case NVM_BLK_T_HOST: - if (!(flags & NVM_FACTORY_RESET_HOST_BLKS)) - set_bit(i, &blk_bitmap[lunoff]); - break; - case NVM_BLK_T_GRWN_BAD: - if (!(flags & NVM_FACTORY_RESET_GRWN_BBLKS)) - set_bit(i, &blk_bitmap[lunoff]); - break; - default: - set_bit(i, &blk_bitmap[lunoff]); - break; - } - } - - return 0; -} - -static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list, - int max_ppas, unsigned long *blk_bitmap) -{ - struct nvm_geo *geo = &dev->geo; - struct ppa_addr ppa; - int ch, lun, blkid, idx, done = 0, ppa_cnt = 0; - unsigned long *offset; - - while (!done) { - done = 1; - nvm_for_each_lun_ppa(geo, ppa, ch, lun) { - idx = factory_blk_offset(geo, ppa); - offset = &blk_bitmap[idx]; - - blkid = find_first_zero_bit(offset, geo->blks_per_lun); - if (blkid >= geo->blks_per_lun) - continue; - set_bit(blkid, offset); - - ppa.g.blk = blkid; - pr_debug("nvm: erase ppa (%u %u %u)\n", - ppa.g.ch, - ppa.g.lun, - ppa.g.blk); - - erase_list[ppa_cnt] = ppa; - ppa_cnt++; - done = 0; - - if (ppa_cnt == max_ppas) - return ppa_cnt; - } - } - - return ppa_cnt; -} - -static int nvm_fact_select_blks(struct nvm_dev *dev, unsigned long *blk_bitmap, - int flags) -{ - struct nvm_geo *geo = &dev->geo; - struct ppa_addr ppa; - int ch, lun, nr_blks, ret = 0; - u8 *blks; - - nr_blks = geo->blks_per_lun * geo->plane_mode; - blks = kmalloc(nr_blks, GFP_KERNEL); - if (!blks) - return -ENOMEM; - - nvm_for_each_lun_ppa(geo, ppa, ch, lun) { - ret = nvm_get_bb_tbl(dev, ppa, blks); - if (ret) - pr_err("nvm: failed bb tbl for ch%u lun%u\n", - ppa.g.ch, ppa.g.blk); - - ret = nvm_factory_blks(dev, ppa, blks, nr_blks, blk_bitmap, - flags); - if (ret) - break; - } - - kfree(blks); - return ret; -} - -int nvm_dev_factory(struct nvm_dev *dev, int flags) -{ - struct nvm_geo *geo = &dev->geo; - struct ppa_addr *ppas; - int ppa_cnt, ret = -ENOMEM; - int max_ppas = dev->ops->max_phys_sect / geo->nr_planes; - struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; - struct sysblk_scan s; - unsigned long *blk_bitmap; - - blk_bitmap = kzalloc(factory_nblks(geo->blks_per_lun) * geo->nr_luns, - GFP_KERNEL); - if (!blk_bitmap) - return ret; - - ppas = kcalloc(max_ppas, sizeof(struct ppa_addr), GFP_KERNEL); - if (!ppas) - goto err_blks; - - /* create list of blks to be erased */ - ret = nvm_fact_select_blks(dev, blk_bitmap, flags); - if (ret) - goto err_ppas; - - /* continue to erase until list of blks until empty */ - while ((ppa_cnt = - nvm_fact_get_blks(dev, ppas, max_ppas, blk_bitmap)) > 0) - nvm_erase_ppa(dev, ppas, ppa_cnt, 0); - - /* mark host reserved blocks free */ - if (flags & NVM_FACTORY_RESET_HOST_BLKS) { - nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); - mutex_lock(&dev->mlock); - ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); - if (!ret) - ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_FREE); - mutex_unlock(&dev->mlock); - } -err_ppas: - kfree(ppas); -err_blks: - kfree(blk_bitmap); - return ret; -} -EXPORT_SYMBOL(nvm_dev_factory); diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index 588d4a34c083..ad54ec9c986f 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -372,7 +372,7 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb, } /* Transform physical address to target address space */ - nvmdev->mt->part_to_tgt(nvmdev, entries, cmd_nlb); + nvm_part_to_tgt(nvmdev, entries, cmd_nlb); if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) { ret = -EINTR; @@ -633,10 +633,9 @@ static ssize_t nvm_dev_attr_show(struct device *dev, return scnprintf(page, PAGE_SIZE, "%u\n", id->cap); } else if (strcmp(attr->name, "device_mode") == 0) { return scnprintf(page, PAGE_SIZE, "%u\n", id->dom); + /* kept for compatibility */ } else if (strcmp(attr->name, "media_manager") == 0) { - if (!ndev->mt) - return scnprintf(page, PAGE_SIZE, "%s\n", "none"); - return scnprintf(page, PAGE_SIZE, "%s\n", ndev->mt->name); + return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm"); } else if (strcmp(attr->name, "ppa_format") == 0) { return scnprintf(page, PAGE_SIZE, "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 7c273bbc5351..84309fe27472 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -80,8 +80,6 @@ struct nvm_dev_ops { unsigned int max_phys_sect; }; - - #ifdef CONFIG_NVM #include @@ -272,15 +270,6 @@ enum { NVM_BLK_ST_BAD = 0x8, /* Bad block */ }; -/* system block cpu representation */ -struct nvm_sb_info { - unsigned long seqnr; - unsigned long erase_cnt; - unsigned int version; - char mmtype[NVM_MMTYPE_LEN]; - struct ppa_addr fs_ppa; -}; - /* Device generic information */ struct nvm_geo { int nr_chnls; @@ -308,6 +297,7 @@ struct nvm_geo { int sec_per_lun; }; +/* sub-device structure */ struct nvm_tgt_dev { /* Device information */ struct nvm_geo geo; @@ -329,17 +319,10 @@ struct nvm_dev { struct list_head devices; - /* Media manager */ - struct nvmm_type *mt; - void *mp; - - /* System blocks */ - struct nvm_sb_info sb; - /* Device information */ struct nvm_geo geo; - /* lower page table */ + /* lower page table */ int lps_per_blk; int *lptbl; @@ -359,6 +342,10 @@ struct nvm_dev { struct mutex mlock; spinlock_t lock; + + /* target management */ + struct list_head area_list; + struct list_head targets; }; static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo, @@ -452,11 +439,6 @@ static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2) (ppa1.g.blk == ppa2.g.blk)); } -static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg) -{ - return dev->lptbl[slc_pg]; -} - typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *); typedef sector_t (nvm_tgt_capacity_fn)(void *); typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *); @@ -487,49 +469,6 @@ extern void nvm_unregister_tgt_type(struct nvm_tgt_type *); extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *); extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t); -typedef int (nvmm_register_fn)(struct nvm_dev *); -typedef void (nvmm_unregister_fn)(struct nvm_dev *); - -typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *); -typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *); -typedef int (nvmm_submit_io_fn)(struct nvm_tgt_dev *, struct nvm_rq *); -typedef int (nvmm_erase_blk_fn)(struct nvm_tgt_dev *, struct ppa_addr *, int); -typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t); -typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t); -typedef struct ppa_addr (nvmm_trans_ppa_fn)(struct nvm_tgt_dev *, - struct ppa_addr, int); -typedef void (nvmm_part_to_tgt_fn)(struct nvm_dev *, sector_t*, int); - -enum { - TRANS_TGT_TO_DEV = 0x0, - TRANS_DEV_TO_TGT = 0x1, -}; - -struct nvmm_type { - const char *name; - unsigned int version[3]; - - nvmm_register_fn *register_mgr; - nvmm_unregister_fn *unregister_mgr; - - nvmm_create_tgt_fn *create_tgt; - nvmm_remove_tgt_fn *remove_tgt; - - nvmm_submit_io_fn *submit_io; - nvmm_erase_blk_fn *erase_blk; - - nvmm_get_area_fn *get_area; - nvmm_put_area_fn *put_area; - - nvmm_trans_ppa_fn *trans_ppa; - nvmm_part_to_tgt_fn *part_to_tgt; - - struct list_head list; -}; - -extern int nvm_register_mgr(struct nvmm_type *); -extern void nvm_unregister_mgr(struct nvmm_type *); - extern struct nvm_dev *nvm_alloc_dev(int); extern int nvm_register(struct nvm_dev *); extern void nvm_unregister(struct nvm_dev *); @@ -559,31 +498,9 @@ extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int); extern int nvm_get_bb_tbl(struct nvm_dev *, struct ppa_addr, u8 *); extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *); -/* sysblk.c */ -#define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */ - -/* system block on disk representation */ -struct nvm_system_block { - __be32 magic; /* magic signature */ - __be32 seqnr; /* sequence number */ - __be32 erase_cnt; /* erase count */ - __be16 version; /* version number */ - u8 mmtype[NVM_MMTYPE_LEN]; /* media manager name */ - __be64 fs_ppa; /* PPA for media manager - * superblock */ -}; - -extern int nvm_get_sysblock(struct nvm_dev *, struct nvm_sb_info *); -extern int nvm_update_sysblock(struct nvm_dev *, struct nvm_sb_info *); -extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *); - extern int nvm_dev_factory(struct nvm_dev *, int flags); -#define nvm_for_each_lun_ppa(geo, ppa, chid, lunid) \ - for ((chid) = 0, (ppa).ppa = 0; (chid) < (geo)->nr_chnls; \ - (chid)++, (ppa).g.ch = (chid)) \ - for ((lunid) = 0; (lunid) < (geo)->luns_per_chnl; \ - (lunid)++, (ppa).g.lun = (lunid)) +extern void nvm_part_to_tgt(struct nvm_dev *, sector_t *, int); #else /* CONFIG_NVM */ struct nvm_dev_ops;