diff options
Diffstat (limited to 'drivers/lightnvm/core.c')
| -rw-r--r-- | drivers/lightnvm/core.c | 377 |
1 files changed, 172 insertions, 205 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 1cac0f8bc0dc..7622e3dc5d82 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -27,8 +27,6 @@ #include <linux/lightnvm.h> #include <linux/sched/sysctl.h> -#include "lightnvm.h" - static LIST_HEAD(nvm_tgt_types); static DECLARE_RWSEM(nvm_tgtt_lock); static LIST_HEAD(nvm_mgrs); @@ -88,8 +86,7 @@ void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, } EXPORT_SYMBOL(nvm_dev_dma_alloc); -void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, - dma_addr_t dma_handler) +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); } @@ -178,38 +175,133 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name) return NULL; } -struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun, - unsigned long flags) +static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev, + struct nvm_rq *rqd) { - return dev->mt->get_blk(dev, lun, flags); + 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); + } } -EXPORT_SYMBOL(nvm_get_blk); -/* Assumes that all valid pages have already been moved on release to bm */ -void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk) +int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, + int type) { - return dev->mt->put_blk(dev, blk); + 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_put_blk); +EXPORT_SYMBOL(nvm_set_bb_tbl); -void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type) +int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, + int nr_ppas, int type) { - return dev->mt->mark_blk(dev, ppa, 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(dev, &rqd, ppas, nr_ppas, 1); + nvm_tgt_generic_to_addr_mode(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"); + 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_mark_blk); +EXPORT_SYMBOL(nvm_max_phys_sects); -int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) +int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) { - return dev->mt->submit_io(dev, rqd); + struct nvm_dev *dev = tgt_dev->parent; + + return dev->mt->submit_io(tgt_dev, rqd); } EXPORT_SYMBOL(nvm_submit_io); -int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk) +int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags) { - return dev->mt->erase_blk(dev, blk, 0); + struct nvm_dev *dev = tgt_dev->parent; + + return dev->mt->erase_blk(tgt_dev, p, flags); } EXPORT_SYMBOL(nvm_erase_blk); +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; + + return dev->mt->get_area(dev, lba, len); +} +EXPORT_SYMBOL(nvm_get_area); + +void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba) +{ + struct nvm_dev *dev = tgt_dev->parent; + + dev->mt->put_area(dev, lba); +} +EXPORT_SYMBOL(nvm_put_area); + void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) { int i; @@ -241,10 +333,11 @@ EXPORT_SYMBOL(nvm_generic_to_addr_mode); int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, const struct ppa_addr *ppas, int nr_ppas, int vblk) { + struct nvm_geo *geo = &dev->geo; int i, plane_cnt, pl_idx; struct ppa_addr ppa; - if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { + if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { rqd->nr_ppas = nr_ppas; rqd->ppa_addr = ppas[0]; @@ -262,7 +355,7 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, for (i = 0; i < nr_ppas; i++) rqd->ppa_list[i] = ppas[i]; } else { - plane_cnt = dev->plane_mode; + plane_cnt = geo->plane_mode; rqd->nr_ppas *= plane_cnt; for (i = 0; i < nr_ppas; i++) { @@ -287,7 +380,8 @@ 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 nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, + int flags) { struct nvm_rq rqd; int ret; @@ -303,6 +397,8 @@ int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas) nvm_generic_to_addr_mode(dev, &rqd); + rqd.flags = flags; + ret = dev->ops->erase_block(dev, &rqd); nvm_free_rqd_ppalist(dev, &rqd); @@ -341,7 +437,7 @@ static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, nvm_generic_to_addr_mode(dev, rqd); - rqd->dev = dev; + rqd->dev = NULL; rqd->opcode = opcode; rqd->flags = flags; rqd->bio = bio; @@ -437,17 +533,18 @@ EXPORT_SYMBOL(nvm_submit_ppa); */ 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 != dev->blks_per_lun * dev->plane_mode) + if (nr_blks != geo->blks_per_lun * geo->plane_mode) return -EINVAL; - for (blk = 0; blk < dev->blks_per_lun; blk++) { - offset = blk * dev->plane_mode; + 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 < dev->plane_mode; pl++) { + 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]; @@ -458,7 +555,7 @@ int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) blks[blk] = blktype; } - return dev->blks_per_lun; + return geo->blks_per_lun; } EXPORT_SYMBOL(nvm_bb_tbl_fold); @@ -470,11 +567,22 @@ int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *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); +} +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 = dev->pgs_per_blk; + dev->lps_per_blk = geo->pgs_per_blk; dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); if (!dev->lptbl) return -ENOMEM; @@ -520,29 +628,32 @@ 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_geo *geo = &dev->geo; int ret; - /* device values */ - dev->nr_chnls = grp->num_ch; - dev->luns_per_chnl = grp->num_lun; - dev->pgs_per_blk = grp->num_pg; - dev->blks_per_lun = grp->num_blk; - dev->nr_planes = grp->num_pln; - dev->fpg_size = grp->fpg_sz; - dev->pfpg_size = grp->fpg_sz * grp->num_pln; - dev->sec_size = grp->csecs; - dev->oob_size = grp->sos; - dev->sec_per_pg = grp->fpg_sz / grp->csecs; - dev->mccap = grp->mccap; - memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); - - dev->plane_mode = NVM_PLANE_SINGLE; - dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size; + /* 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) - dev->plane_mode = NVM_PLANE_DOUBLE; + geo->plane_mode = NVM_PLANE_DOUBLE; if (grp->mpos & 0x040404) - dev->plane_mode = NVM_PLANE_QUAD; + geo->plane_mode = NVM_PLANE_QUAD; if (grp->mtype != 0) { pr_err("nvm: memory type not supported\n"); @@ -550,13 +661,13 @@ static int nvm_core_init(struct nvm_dev *dev) } /* calculated values */ - dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes; - dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk; - dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun; - dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls; + 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 = dev->nr_luns * dev->sec_per_lun; - dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns), + 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; @@ -583,7 +694,7 @@ static int nvm_core_init(struct nvm_dev *dev) mutex_init(&dev->mlock); spin_lock_init(&dev->lock); - blk_queue_logical_block_size(dev->q, dev->sec_size); + blk_queue_logical_block_size(dev->q, geo->sec_size); return 0; err_fmtype: @@ -617,6 +728,7 @@ void nvm_free(struct nvm_dev *dev) static int nvm_init(struct nvm_dev *dev) { + struct nvm_geo *geo = &dev->geo; int ret = -EINVAL; if (!dev->q || !dev->ops) @@ -648,20 +760,15 @@ static int nvm_init(struct nvm_dev *dev) } pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", - dev->name, dev->sec_per_pg, dev->nr_planes, - dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns, - dev->nr_chnls); + 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; } -static void nvm_exit(struct nvm_dev *dev) -{ - nvm_sysfs_unregister_dev(dev); -} - struct nvm_dev *nvm_alloc_dev(int node) { return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); @@ -691,10 +798,6 @@ int nvm_register(struct nvm_dev *dev) } } - ret = nvm_sysfs_register_dev(dev); - if (ret) - goto err_ppalist; - if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { ret = nvm_get_sysblock(dev, &dev->sb); if (!ret) @@ -711,8 +814,6 @@ int nvm_register(struct nvm_dev *dev) up_write(&nvm_lock); return 0; -err_ppalist: - dev->ops->destroy_dma_pool(dev->dma_pool); err_init: kfree(dev->lun_map); return ret; @@ -725,7 +826,7 @@ void nvm_unregister(struct nvm_dev *dev) list_del(&dev->devices); up_write(&nvm_lock); - nvm_exit(dev); + nvm_free(dev); } EXPORT_SYMBOL(nvm_unregister); @@ -754,149 +855,15 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create) } s = &create->conf.s; - if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) { + 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->nr_luns); + s->lun_begin, s->lun_end, dev->geo.nr_luns); return -EINVAL; } return dev->mt->create_tgt(dev, create); } -#ifdef CONFIG_NVM_DEBUG -static int nvm_configure_show(const char *val) -{ - struct nvm_dev *dev; - char opcode, devname[DISK_NAME_LEN]; - int ret; - - ret = sscanf(val, "%c %32s", &opcode, devname); - if (ret != 2) { - pr_err("nvm: invalid command. Use \"opcode devicename\".\n"); - return -EINVAL; - } - - down_write(&nvm_lock); - dev = nvm_find_nvm_dev(devname); - up_write(&nvm_lock); - if (!dev) { - pr_err("nvm: device not found\n"); - return -EINVAL; - } - - if (!dev->mt) - return 0; - - dev->mt->lun_info_print(dev); - - return 0; -} - -static int nvm_configure_remove(const char *val) -{ - struct nvm_ioctl_remove remove; - struct nvm_dev *dev; - char opcode; - int ret = 0; - - ret = sscanf(val, "%c %256s", &opcode, remove.tgtname); - if (ret != 2) { - pr_err("nvm: invalid command. Use \"d targetname\".\n"); - return -EINVAL; - } - - remove.flags = 0; - - list_for_each_entry(dev, &nvm_devices, devices) { - ret = dev->mt->remove_tgt(dev, &remove); - if (!ret) - break; - } - - return ret; -} - -static int nvm_configure_create(const char *val) -{ - struct nvm_ioctl_create create; - char opcode; - int lun_begin, lun_end, ret; - - ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev, - create.tgtname, create.tgttype, - &lun_begin, &lun_end); - if (ret != 6) { - pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n"); - return -EINVAL; - } - - create.flags = 0; - create.conf.type = NVM_CONFIG_TYPE_SIMPLE; - create.conf.s.lun_begin = lun_begin; - create.conf.s.lun_end = lun_end; - - return __nvm_configure_create(&create); -} - - -/* Exposes administrative interface through /sys/module/lnvm/configure_by_str */ -static int nvm_configure_by_str_event(const char *val, - const struct kernel_param *kp) -{ - char opcode; - int ret; - - ret = sscanf(val, "%c", &opcode); - if (ret != 1) { - pr_err("nvm: string must have the format of \"cmd ...\"\n"); - return -EINVAL; - } - - switch (opcode) { - case 'a': - return nvm_configure_create(val); - case 'd': - return nvm_configure_remove(val); - case 's': - return nvm_configure_show(val); - default: - pr_err("nvm: invalid command\n"); - return -EINVAL; - } - - return 0; -} - -static int nvm_configure_get(char *buf, const struct kernel_param *kp) -{ - int sz; - struct nvm_dev *dev; - - sz = sprintf(buf, "available devices:\n"); - down_write(&nvm_lock); - list_for_each_entry(dev, &nvm_devices, devices) { - if (sz > 4095 - DISK_NAME_LEN - 2) - break; - sz += sprintf(buf + sz, " %32s\n", dev->name); - } - up_write(&nvm_lock); - - return sz; -} - -static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = { - .set = nvm_configure_by_str_event, - .get = nvm_configure_get, -}; - -#undef MODULE_PARAM_PREFIX -#define MODULE_PARAM_PREFIX "lnvm." - -module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL, - 0644); - -#endif /* CONFIG_NVM_DEBUG */ - static long nvm_ioctl_info(struct file *file, void __user *arg) { struct nvm_ioctl_info *info; |