diff options
Diffstat (limited to 'drivers/lightnvm/core.c')
| -rw-r--r-- | drivers/lightnvm/core.c | 1027 |
1 files changed, 611 insertions, 416 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 02240a0b39c9..5262ba66a7a7 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -29,10 +29,483 @@ 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 */ +}; + +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); + + if (tt->sysfs_init && tt->sysfs_init(tdisk)) + goto err_sysfs; + + 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_sysfs: + if (tt->exit) + tt->exit(targetdata); +err_init: + put_disk(tdisk); +err_queue: + blk_cleanup_queue(tqueue); +err_dev: + nvm_remove_tgt_dev(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->sysfs_exit) + tt->sysfs_exit(tdisk); + + 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 void 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]; + + p->g.ch += ch_map->ch_off; + p->g.lun += lun_off; +} + +static void 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; +} + +static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, + struct ppa_addr *ppa_list, int nr_ppas) +{ + int i; + + for (i = 0; i < nr_ppas; i++) { + nvm_map_to_dev(tgt_dev, &ppa_list[i]); + ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]); + } +} + +static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, + struct ppa_addr *ppa_list, int nr_ppas) +{ + int i; + + for (i = 0; i < nr_ppas; i++) { + ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]); + nvm_map_to_tgt(tgt_dev, &ppa_list[i]); + } +} + +static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) +{ + if (rqd->nr_ppas == 1) { + nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1); + return; + } + + nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas); +} + +static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) +{ + if (rqd->nr_ppas == 1) { + nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1); + return; + } + + nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas); +} + +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 +565,6 @@ 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; @@ -175,53 +576,6 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name) return NULL; } -static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev, - struct nvm_rq *rqd) -{ - struct nvm_dev *dev = tgt_dev->parent; - int i; - - 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], 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, - TRANS_TGT_TO_DEV); - rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); - } -} - -int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, - int type) -{ - struct nvm_rq rqd; - int ret; - - if (nr_ppas > dev->ops->max_phys_sect) { - pr_err("nvm: unable to update all sysblocks atomically\n"); - return -EINVAL; - } - - memset(&rqd, 0, sizeof(struct nvm_rq)); - - nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); - nvm_generic_to_addr_mode(dev, &rqd); - - 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"); - return -EINVAL; - } - - return 0; -} -EXPORT_SYMBOL(nvm_set_bb_tbl); - int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int nr_ppas, int type) { @@ -237,12 +591,12 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, memset(&rqd, 0, sizeof(struct nvm_rq)); nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); - nvm_tgt_generic_to_addr_mode(tgt_dev, &rqd); + nvm_rq_tgt_to_dev(tgt_dev, &rqd); 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 +616,42 @@ 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; + + nvm_rq_tgt_to_dev(tgt_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) +int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags) { struct nvm_dev *dev = tgt_dev->parent; + struct nvm_rq rqd; + int ret; + + if (!dev->ops->erase_block) + return 0; + + nvm_map_to_dev(tgt_dev, ppas); + + memset(&rqd, 0, sizeof(struct nvm_rq)); + + ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1); + if (ret) + return ret; + + nvm_rq_tgt_to_dev(tgt_dev, &rqd); + + rqd.flags = flags; + + ret = dev->ops->erase_block(dev, &rqd); - return dev->mt->erase_blk(tgt_dev, p, flags); + nvm_free_rqd_ppalist(dev, &rqd); + + return ret; } EXPORT_SYMBOL(nvm_erase_blk); @@ -289,46 +670,67 @@ 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; - return dev->mt->get_area(dev, lba, len); -} -EXPORT_SYMBOL(nvm_get_area); + if (len > max_sectors) + return -EINVAL; -void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba) -{ - struct nvm_dev *dev = tgt_dev->parent; + area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL); + if (!area) + return -ENOMEM; - dev->mt->put_area(dev, lba); -} -EXPORT_SYMBOL(nvm_put_area); + prev = NULL; -void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) -{ - int i; + 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 (rqd->nr_ppas > 1) { - for (i = 0; i < rqd->nr_ppas; i++) - rqd->ppa_list[i] = dev_to_generic_addr(dev, - rqd->ppa_list[i]); - } else { - rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); + 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, &dev->area_list); + spin_unlock(&dev->lock); + + return 0; } -EXPORT_SYMBOL(nvm_addr_to_generic_mode); +EXPORT_SYMBOL(nvm_get_area); -void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) +void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) { - int i; + struct nvm_dev *dev = tgt_dev->parent; + struct nvm_area *area; - if (rqd->nr_ppas > 1) { - for (i = 0; i < rqd->nr_ppas; i++) - rqd->ppa_list[i] = generic_to_dev_addr(dev, - rqd->ppa_list[i]); - } else { - rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); + 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_generic_to_addr_mode); +EXPORT_SYMBOL(nvm_put_area); int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, const struct ppa_addr *ppas, int nr_ppas, int vblk) @@ -380,149 +782,19 @@ void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) } EXPORT_SYMBOL(nvm_free_rqd_ppalist); -int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, - int flags) +void nvm_end_io(struct nvm_rq *rqd) { - struct nvm_rq rqd; - int ret; + struct nvm_tgt_dev *tgt_dev = rqd->dev; - if (!dev->ops->erase_block) - return 0; + /* Convert address space */ + if (tgt_dev) + nvm_rq_dev_to_tgt(tgt_dev, rqd); - memset(&rqd, 0, sizeof(struct nvm_rq)); - - ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); - if (ret) - return ret; - - nvm_generic_to_addr_mode(dev, &rqd); - - rqd.flags = flags; - - ret = dev->ops->erase_block(dev, &rqd); - - nvm_free_rqd_ppalist(dev, &rqd); - - return ret; -} -EXPORT_SYMBOL(nvm_erase_ppa); - -void nvm_end_io(struct nvm_rq *rqd, int error) -{ - rqd->error = error; - rqd->end_io(rqd); + if (rqd->end_io) + rqd->end_io(rqd); } EXPORT_SYMBOL(nvm_end_io); -static void nvm_end_io_sync(struct nvm_rq *rqd) -{ - struct completion *waiting = rqd->wait; - - rqd->wait = NULL; - - complete(waiting); -} - -static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, - int flags, void *buf, int len) -{ - DECLARE_COMPLETION_ONSTACK(wait); - struct bio *bio; - int ret; - unsigned long hang_check; - - bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); - if (IS_ERR_OR_NULL(bio)) - return -ENOMEM; - - nvm_generic_to_addr_mode(dev, rqd); - - rqd->dev = NULL; - rqd->opcode = opcode; - rqd->flags = flags; - rqd->bio = bio; - rqd->wait = &wait; - rqd->end_io = nvm_end_io_sync; - - ret = dev->ops->submit_io(dev, rqd); - if (ret) { - bio_put(bio); - return ret; - } - - /* Prevent hang_check timer from firing at us during very long I/O */ - hang_check = sysctl_hung_task_timeout_secs; - if (hang_check) - while (!wait_for_completion_io_timeout(&wait, - hang_check * (HZ/2))) - ; - else - wait_for_completion_io(&wait); - - return rqd->error; -} - -/** - * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must - * take to free ppa list if necessary. - * @dev: device - * @ppa_list: user created ppa_list - * @nr_ppas: length of ppa_list - * @opcode: device opcode - * @flags: device flags - * @buf: data buffer - * @len: data buffer length - */ -int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list, - int nr_ppas, int opcode, int flags, void *buf, int len) -{ - struct nvm_rq rqd; - - if (dev->ops->max_phys_sect < nr_ppas) - return -EINVAL; - - memset(&rqd, 0, sizeof(struct nvm_rq)); - - rqd.nr_ppas = nr_ppas; - if (nr_ppas > 1) - rqd.ppa_list = ppa_list; - else - rqd.ppa_addr = ppa_list[0]; - - return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); -} -EXPORT_SYMBOL(nvm_submit_ppa_list); - -/** - * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded - * as single, dual, quad plane PPAs depending on device type. - * @dev: device - * @ppa: user created ppa_list - * @nr_ppas: length of ppa_list - * @opcode: device opcode - * @flags: device flags - * @buf: data buffer - * @len: data buffer length - */ -int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, - int opcode, int flags, void *buf, int len) -{ - struct nvm_rq rqd; - int ret; - - memset(&rqd, 0, sizeof(struct nvm_rq)); - ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1); - if (ret) - return ret; - - ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); - - nvm_free_rqd_ppalist(dev, &rqd); - - return ret; -} -EXPORT_SYMBOL(nvm_submit_ppa); - /* * folds a bad block list from its plane representation to its virtual * block representation. The fold is done in place and reduced size is @@ -559,21 +831,14 @@ int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) } EXPORT_SYMBOL(nvm_bb_tbl_fold); -int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks) -{ - ppa = generic_to_dev_addr(dev, ppa); - - return dev->ops->get_bb_tbl(dev, ppa, blks); -} -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 = dev->mt->trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV); - return nvm_get_bb_tbl(dev, ppa, blks); + nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1); + + return dev->ops->get_bb_tbl(dev, ppa, blks); } EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); @@ -627,7 +892,7 @@ static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) static int nvm_core_init(struct nvm_dev *dev) { struct nvm_id *id = &dev->identity; - struct nvm_id_group *grp = &id->groups[0]; + struct nvm_id_group *grp = &id->grp; struct nvm_geo *geo = &dev->geo; int ret; @@ -691,36 +956,31 @@ 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); @@ -731,28 +991,19 @@ 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; } - pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", - dev->identity.ver_id, dev->identity.vmnt, - dev->identity.cgrps); + pr_debug("nvm: ver:%x nvm_vendor:%x\n", + dev->identity.ver_id, dev->identity.vmnt); if (dev->identity.ver_id != 1) { pr_err("nvm: device not supported by kernel."); goto err; } - if (dev->identity.cgrps != 1) { - pr_err("nvm: only one group configuration supported."); - goto err; - } - ret = nvm_core_init(dev); if (ret) { pr_err("nvm: could not initialize core structures.\n"); @@ -779,49 +1030,50 @@ 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); @@ -844,24 +1096,24 @@ 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; } s = &create->conf.s; - if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) { + if (s->lun_begin == -1 && s->lun_end == -1) { + s->lun_begin = 0; + s->lun_end = dev->geo.nr_luns - 1; + } + + if (s->lun_begin > s->lun_end || s->lun_end >= dev->geo.nr_luns) { pr_err("nvm: lun out of bound (%u:%u > %u)\n", - s->lun_begin, s->lun_end, dev->geo.nr_luns); + s->lun_begin, s->lun_end, dev->geo.nr_luns - 1); 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 +1175,14 @@ 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 +1244,7 @@ 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 +1252,7 @@ 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 +1268,13 @@ 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 +1287,6 @@ 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; } |