diff options
Diffstat (limited to 'drivers/lightnvm/core.c')
| -rw-r--r-- | drivers/lightnvm/core.c | 1379 |
1 files changed, 0 insertions, 1379 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c deleted file mode 100644 index ddae430b6eae..000000000000 --- a/drivers/lightnvm/core.c +++ /dev/null @@ -1,1379 +0,0 @@ -/* - * Copyright (C) 2015 IT University of Copenhagen. All rights reserved. - * Initial release: Matias Bjorling <m@bjorling.me> - * - * 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 <linux/list.h> -#include <linux/types.h> -#include <linux/sem.h> -#include <linux/bitmap.h> -#include <linux/moduleparam.h> -#include <linux/miscdevice.h> -#include <linux/lightnvm.h> -#include <linux/sched/sysctl.h> - -static LIST_HEAD(nvm_tgt_types); -static DECLARE_RWSEM(nvm_tgtt_lock); -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, int clear) -{ - 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; - - if (clear) { - 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; - int ret; - - 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); - - ret = nvm_reserve_luns(dev, s->lun_begin, s->lun_end); - if (ret) - return ret; - - t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); - if (!t) { - ret = -ENOMEM; - 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"); - ret = -ENOMEM; - goto err_t; - } - - tdisk = alloc_disk(0); - if (!tdisk) { - ret = -ENOMEM; - goto err_dev; - } - - tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); - if (!tqueue) { - ret = -ENOMEM; - goto err_disk; - } - blk_queue_make_request(tqueue, tt->make_rq); - - strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name)); - 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, create->flags); - if (IS_ERR(targetdata)) { - ret = PTR_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)) { - ret = -ENOMEM; - 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: - blk_cleanup_queue(tqueue); - tdisk->queue = NULL; -err_disk: - put_disk(tdisk); -err_dev: - nvm_remove_tgt_dev(tgt_dev, 0); -err_t: - kfree(t); -err_reserve: - nvm_release_luns_err(dev, s->lun_begin, s->lun_end); - return ret; -} - -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, 1); - 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_unregister_map(struct nvm_dev *dev) -{ - struct nvm_dev_map *rmap = dev->rmap; - int i; - - for (i = 0; i < dev->geo.nr_chnls; i++) - kfree(rmap->chnls[i].lun_offs); - - kfree(rmap->chnls); - kfree(rmap); -} - -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]); - 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; - - 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; - - if (lock) - down_write(&nvm_tgtt_lock); - - list_for_each_entry(tmp, &nvm_tgt_types, list) - if (!strcmp(name, tmp->name)) { - tt = tmp; - break; - } - - if (lock) - up_write(&nvm_tgtt_lock); - return tt; -} -EXPORT_SYMBOL(nvm_find_target_type); - -int nvm_register_tgt_type(struct nvm_tgt_type *tt) -{ - int ret = 0; - - down_write(&nvm_tgtt_lock); - if (nvm_find_target_type(tt->name, 0)) - ret = -EEXIST; - else - list_add(&tt->list, &nvm_tgt_types); - up_write(&nvm_tgtt_lock); - - return ret; -} -EXPORT_SYMBOL(nvm_register_tgt_type); - -void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) -{ - if (!tt) - return; - - down_write(&nvm_lock); - list_del(&tt->list); - up_write(&nvm_lock); -} -EXPORT_SYMBOL(nvm_unregister_tgt_type); - -void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, - dma_addr_t *dma_handler) -{ - return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, - dma_handler); -} -EXPORT_SYMBOL(nvm_dev_dma_alloc); - -void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) -{ - dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); -} -EXPORT_SYMBOL(nvm_dev_dma_free); - -static struct nvm_dev *nvm_find_nvm_dev(const char *name) -{ - struct nvm_dev *dev; - - list_for_each_entry(dev, &nvm_devices, devices) - if (!strcmp(name, dev->name)) - return dev; - - return NULL; -} - -int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, - int nr_ppas, int type) -{ - struct nvm_dev *dev = tgt_dev->parent; - struct nvm_rq rqd; - int ret; - - if (nr_ppas > dev->ops->max_phys_sect) { - pr_err("nvm: unable to update all blocks atomically\n"); - return -EINVAL; - } - - memset(&rqd, 0, sizeof(struct nvm_rq)); - - nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); - 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(tgt_dev, &rqd); - if (ret) { - pr_err("nvm: failed bb mark\n"); - return -EINVAL; - } - - return 0; -} -EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); - -int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev) -{ - struct nvm_dev *dev = tgt_dev->parent; - - return dev->ops->max_phys_sect; -} -EXPORT_SYMBOL(nvm_max_phys_sects); - -int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) -{ - struct nvm_dev *dev = tgt_dev->parent; - int ret; - - if (!dev->ops->submit_io) - return -ENODEV; - - nvm_rq_tgt_to_dev(tgt_dev, rqd); - - rqd->dev = tgt_dev; - - /* In case of error, fail with right address format */ - ret = dev->ops->submit_io(dev, rqd); - if (ret) - nvm_rq_dev_to_tgt(tgt_dev, rqd); - return ret; -} -EXPORT_SYMBOL(nvm_submit_io); - -static void nvm_end_io_sync(struct nvm_rq *rqd) -{ - struct completion *waiting = rqd->private; - - complete(waiting); -} - -int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, - int nr_ppas) -{ - struct nvm_geo *geo = &tgt_dev->geo; - struct nvm_rq rqd; - int ret; - DECLARE_COMPLETION_ONSTACK(wait); - - memset(&rqd, 0, sizeof(struct nvm_rq)); - - rqd.opcode = NVM_OP_ERASE; - rqd.end_io = nvm_end_io_sync; - rqd.private = &wait; - rqd.flags = geo->plane_mode >> 1; - - ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); - if (ret) - return ret; - - ret = nvm_submit_io(tgt_dev, &rqd); - if (ret) { - pr_err("rrpr: erase I/O submission failed: %d\n", ret); - goto free_ppa_list; - } - wait_for_completion_io(&wait); - -free_ppa_list: - nvm_free_rqd_ppalist(tgt_dev, &rqd); - - return ret; -} -EXPORT_SYMBOL(nvm_erase_sync); - -int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, - nvm_l2p_update_fn *update_l2p, void *priv) -{ - struct nvm_dev *dev = tgt_dev->parent; - - if (!dev->ops->get_l2p_tbl) - return 0; - - return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); -} -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; - } - - 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 begin) -{ - struct nvm_dev *dev = tgt_dev->parent; - struct nvm_area *area; - - 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); - -int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, - const struct ppa_addr *ppas, int nr_ppas, int vblk) -{ - struct nvm_dev *dev = tgt_dev->parent; - struct nvm_geo *geo = &tgt_dev->geo; - int i, plane_cnt, pl_idx; - struct ppa_addr ppa; - - if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { - rqd->nr_ppas = nr_ppas; - rqd->ppa_addr = ppas[0]; - - return 0; - } - - rqd->nr_ppas = nr_ppas; - rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); - if (!rqd->ppa_list) { - pr_err("nvm: failed to allocate dma memory\n"); - return -ENOMEM; - } - - if (!vblk) { - for (i = 0; i < nr_ppas; i++) - rqd->ppa_list[i] = ppas[i]; - } else { - plane_cnt = geo->plane_mode; - rqd->nr_ppas *= plane_cnt; - - for (i = 0; i < nr_ppas; i++) { - for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { - ppa = ppas[i]; - ppa.g.pl = pl_idx; - rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; - } - } - } - - return 0; -} -EXPORT_SYMBOL(nvm_set_rqd_ppalist); - -void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) -{ - if (!rqd->ppa_list) - return; - - nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list); -} -EXPORT_SYMBOL(nvm_free_rqd_ppalist); - -void nvm_end_io(struct nvm_rq *rqd) -{ - struct nvm_tgt_dev *tgt_dev = rqd->dev; - - /* Convert address space */ - if (tgt_dev) - nvm_rq_dev_to_tgt(tgt_dev, rqd); - - if (rqd->end_io) - rqd->end_io(rqd); -} -EXPORT_SYMBOL(nvm_end_io); - -/* - * folds a bad block list from its plane representation to its virtual - * block representation. The fold is done in place and reduced size is - * returned. - * - * If any of the planes status are bad or grown bad block, the virtual block - * is marked bad. If not bad, the first plane state acts as the block state. - */ -int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) -{ - struct nvm_geo *geo = &dev->geo; - int blk, offset, pl, blktype; - - if (nr_blks != geo->blks_per_lun * geo->plane_mode) - return -EINVAL; - - for (blk = 0; blk < geo->blks_per_lun; blk++) { - offset = blk * geo->plane_mode; - blktype = blks[offset]; - - /* Bad blocks on any planes take precedence over other types */ - for (pl = 0; pl < geo->plane_mode; pl++) { - if (blks[offset + pl] & - (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { - blktype = blks[offset + pl]; - break; - } - } - - blks[blk] = blktype; - } - - return geo->blks_per_lun; -} -EXPORT_SYMBOL(nvm_bb_tbl_fold); - -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; - - 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); - -static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) -{ - struct nvm_geo *geo = &dev->geo; - int i; - - dev->lps_per_blk = geo->pgs_per_blk; - dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); - if (!dev->lptbl) - return -ENOMEM; - - /* Just a linear array */ - for (i = 0; i < dev->lps_per_blk; i++) - dev->lptbl[i] = i; - - return 0; -} - -static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) -{ - int i, p; - struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; - - if (!mlc->num_pairs) - return 0; - - dev->lps_per_blk = mlc->num_pairs; - dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); - if (!dev->lptbl) - return -ENOMEM; - - /* The lower page table encoding consists of a list of bytes, where each - * has a lower and an upper half. The first half byte maintains the - * increment value and every value after is an offset added to the - * previous incrementation value - */ - dev->lptbl[0] = mlc->pairs[0] & 0xF; - for (i = 1; i < dev->lps_per_blk; i++) { - p = mlc->pairs[i >> 1]; - if (i & 0x1) /* upper */ - dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); - else /* lower */ - dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); - } - - return 0; -} - -static int nvm_core_init(struct nvm_dev *dev) -{ - struct nvm_id *id = &dev->identity; - struct nvm_id_group *grp = &id->grp; - struct nvm_geo *geo = &dev->geo; - int ret; - - /* Whole device values */ - geo->nr_chnls = grp->num_ch; - geo->luns_per_chnl = grp->num_lun; - - /* Generic device values */ - geo->pgs_per_blk = grp->num_pg; - geo->blks_per_lun = grp->num_blk; - geo->nr_planes = grp->num_pln; - geo->fpg_size = grp->fpg_sz; - geo->pfpg_size = grp->fpg_sz * grp->num_pln; - geo->sec_size = grp->csecs; - geo->oob_size = grp->sos; - geo->sec_per_pg = grp->fpg_sz / grp->csecs; - geo->mccap = grp->mccap; - memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); - - geo->plane_mode = NVM_PLANE_SINGLE; - geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; - - if (grp->mpos & 0x020202) - geo->plane_mode = NVM_PLANE_DOUBLE; - if (grp->mpos & 0x040404) - geo->plane_mode = NVM_PLANE_QUAD; - - if (grp->mtype != 0) { - pr_err("nvm: memory type not supported\n"); - return -EINVAL; - } - - /* calculated values */ - geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; - geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; - geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; - geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; - - dev->total_secs = geo->nr_luns * geo->sec_per_lun; - dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), - sizeof(unsigned long), GFP_KERNEL); - if (!dev->lun_map) - return -ENOMEM; - - switch (grp->fmtype) { - case NVM_ID_FMTYPE_SLC: - if (nvm_init_slc_tbl(dev, grp)) { - ret = -ENOMEM; - goto err_fmtype; - } - break; - case NVM_ID_FMTYPE_MLC: - if (nvm_init_mlc_tbl(dev, grp)) { - ret = -ENOMEM; - goto err_fmtype; - } - break; - default: - pr_err("nvm: flash type not supported\n"); - ret = -EINVAL; - goto err_fmtype; - } - - INIT_LIST_HEAD(&dev->area_list); - INIT_LIST_HEAD(&dev->targets); - mutex_init(&dev->mlock); - spin_lock_init(&dev->lock); - - 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(struct nvm_dev *dev) -{ - if (!dev) - return; - - if (dev->dma_pool) - dev->ops->destroy_dma_pool(dev->dma_pool); - - nvm_unregister_map(dev); - kfree(dev->lptbl); - kfree(dev->lun_map); - kfree(dev); -} - -static int nvm_init(struct nvm_dev *dev) -{ - struct nvm_geo *geo = &dev->geo; - int ret = -EINVAL; - - 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\n", - dev->identity.ver_id, dev->identity.vmnt); - - if (dev->identity.ver_id != 1) { - pr_err("nvm: device not supported by kernel."); - goto err; - } - - ret = nvm_core_init(dev); - if (ret) { - pr_err("nvm: could not initialize core structures.\n"); - goto err; - } - - pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", - dev->name, geo->sec_per_pg, geo->nr_planes, - geo->pgs_per_blk, geo->blks_per_lun, - geo->nr_luns, geo->nr_chnls); - return 0; -err: - pr_err("nvm: failed to initialize nvm\n"); - return ret; -} - -struct nvm_dev *nvm_alloc_dev(int node) -{ - return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); -} -EXPORT_SYMBOL(nvm_alloc_dev); - -int nvm_register(struct nvm_dev *dev) -{ - int ret; - - if (!dev->q || !dev->ops) - return -EINVAL; - - if (dev->ops->max_phys_sect > 256) { - pr_info("nvm: max sectors supported is 256.\n"); - 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"); - return -ENOMEM; - } - } - - ret = nvm_init(dev); - if (ret) - goto err_init; - - /* register device with a supported media manager */ - down_write(&nvm_lock); - list_add(&dev->devices, &nvm_devices); - up_write(&nvm_lock); - - return 0; -err_init: - 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); - - nvm_free(dev); -} -EXPORT_SYMBOL(nvm_unregister); - -static int __nvm_configure_create(struct nvm_ioctl_create *create) -{ - struct nvm_dev *dev; - struct nvm_ioctl_create_simple *s; - - down_write(&nvm_lock); - dev = nvm_find_nvm_dev(create->dev); - up_write(&nvm_lock); - - if (!dev) { - pr_err("nvm: device not found\n"); - return -EINVAL; - } - - 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 == -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 - 1); - return -EINVAL; - } - - return nvm_create_tgt(dev, create); -} - -static long nvm_ioctl_info(struct file *file, void __user *arg) -{ - struct nvm_ioctl_info *info; - struct nvm_tgt_type *tt; - int tgt_iter = 0; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); - if (IS_ERR(info)) - return -EFAULT; - - info->version[0] = NVM_VERSION_MAJOR; - info->version[1] = NVM_VERSION_MINOR; - info->version[2] = NVM_VERSION_PATCH; - - down_write(&nvm_lock); - list_for_each_entry(tt, &nvm_tgt_types, list) { - struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; - - tgt->version[0] = tt->version[0]; - tgt->version[1] = tt->version[1]; - tgt->version[2] = tt->version[2]; - strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); - - tgt_iter++; - } - - info->tgtsize = tgt_iter; - up_write(&nvm_lock); - - if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { - kfree(info); - return -EFAULT; - } - - kfree(info); - return 0; -} - -static long nvm_ioctl_get_devices(struct file *file, void __user *arg) -{ - struct nvm_ioctl_get_devices *devices; - struct nvm_dev *dev; - int i = 0; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); - if (!devices) - return -ENOMEM; - - down_write(&nvm_lock); - list_for_each_entry(dev, &nvm_devices, devices) { - struct nvm_ioctl_device_info *info = &devices->info[i]; - - strlcpy(info->devname, dev->name, sizeof(info->devname)); - - /* kept for compatibility */ - info->bmversion[0] = 1; - info->bmversion[1] = 0; - info->bmversion[2] = 0; - strlcpy(info->bmname, "gennvm", sizeof(info->bmname)); - i++; - - if (i > 31) { - pr_err("nvm: max 31 devices can be reported.\n"); - break; - } - } - up_write(&nvm_lock); - - devices->nr_devices = i; - - if (copy_to_user(arg, devices, - sizeof(struct nvm_ioctl_get_devices))) { - kfree(devices); - return -EFAULT; - } - - kfree(devices); - return 0; -} - -static long nvm_ioctl_dev_create(struct file *file, void __user *arg) -{ - struct nvm_ioctl_create create; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) - return -EFAULT; - - create.dev[DISK_NAME_LEN - 1] = '\0'; - create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; - create.tgtname[DISK_NAME_LEN - 1] = '\0'; - - if (create.flags != 0) { - __u32 flags = create.flags; - - /* Check for valid flags */ - if (flags & NVM_TARGET_FACTORY) - flags &= ~NVM_TARGET_FACTORY; - - if (flags) { - pr_err("nvm: flag not supported\n"); - return -EINVAL; - } - } - - return __nvm_configure_create(&create); -} - -static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) -{ - struct nvm_ioctl_remove remove; - struct nvm_dev *dev; - int ret = 0; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) - return -EFAULT; - - remove.tgtname[DISK_NAME_LEN - 1] = '\0'; - - if (remove.flags != 0) { - pr_err("nvm: no flags supported\n"); - return -EINVAL; - } - - list_for_each_entry(dev, &nvm_devices, devices) { - ret = nvm_remove_tgt(dev, &remove); - if (!ret) - break; - } - - return ret; -} - -/* kept for compatibility reasons */ -static long nvm_ioctl_dev_init(struct file *file, void __user *arg) -{ - struct nvm_ioctl_dev_init init; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) - return -EFAULT; - - if (init.flags != 0) { - pr_err("nvm: no flags supported\n"); - return -EINVAL; - } - - return 0; -} - -/* Kept for compatibility reasons */ -static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) -{ - struct nvm_ioctl_dev_factory fact; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) - return -EFAULT; - - fact.dev[DISK_NAME_LEN - 1] = '\0'; - - if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) - return -EINVAL; - - return 0; -} - -static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - - switch (cmd) { - case NVM_INFO: - return nvm_ioctl_info(file, argp); - case NVM_GET_DEVICES: - return nvm_ioctl_get_devices(file, argp); - case NVM_DEV_CREATE: - return nvm_ioctl_dev_create(file, argp); - case NVM_DEV_REMOVE: - return nvm_ioctl_dev_remove(file, argp); - case NVM_DEV_INIT: - return nvm_ioctl_dev_init(file, argp); - case NVM_DEV_FACTORY: - return nvm_ioctl_dev_factory(file, argp); - } - return 0; -} - -static const struct file_operations _ctl_fops = { - .open = nonseekable_open, - .unlocked_ioctl = nvm_ctl_ioctl, - .owner = THIS_MODULE, - .llseek = noop_llseek, -}; - -static struct miscdevice _nvm_misc = { - .minor = MISC_DYNAMIC_MINOR, - .name = "lightnvm", - .nodename = "lightnvm/control", - .fops = &_ctl_fops, -}; -builtin_misc_device(_nvm_misc); |