Bad blocks should be managed by block owners. This would be either targets for data blocks or sysblk for system blocks.
In order to support this, export two functions: One to mark a block as an specific type (e.g., bad block) and another to update the bad block table on the device. Move bad block management to rrpc. Signed-off-by: Javier González <jav...@cnexlabs.com> --- drivers/lightnvm/core.c | 27 +++++++++++++++++++++++++++ drivers/lightnvm/gennvm.c | 25 +------------------------ drivers/lightnvm/rrpc.c | 34 +++++++++++++++++++++++++++++++++- drivers/lightnvm/sysblk.c | 29 +++++------------------------ include/linux/lightnvm.h | 17 ++++++++++++++++- 5 files changed, 82 insertions(+), 50 deletions(-) diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 4c6577e..bbfff14 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -197,6 +197,33 @@ void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type) } EXPORT_SYMBOL(nvm_mark_blk); +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_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) { return dev->mt->submit_io(dev, rqd); diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index a340685..94fdffd 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -617,34 +617,11 @@ static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type) blk->state = type; } -/* - * mark block bad in gen. It is expected that the target recovers separately - */ -static void gen_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd) -{ - int bit = -1; - int max_secs = dev->ops->max_phys_sect; - void *comp_bits = &rqd->ppa_status; - - nvm_addr_to_generic_mode(dev, rqd); - - /* look up blocks and mark them as bad */ - if (rqd->nr_ppas == 1) { - gen_mark_blk(dev, rqd->ppa_addr, NVM_BLK_ST_BAD); - return; - } - - while ((bit = find_next_bit(comp_bits, max_secs, bit + 1)) < max_secs) - gen_mark_blk(dev, rqd->ppa_list[bit], NVM_BLK_ST_BAD); -} - static void gen_end_io(struct nvm_rq *rqd) { struct nvm_tgt_instance *ins = rqd->ins; - if (rqd->error == NVM_RSP_ERR_FAILWRITE) - gen_mark_blk_bad(rqd->dev, rqd); - + /* Write failures and bad blocks are managed within the target */ ins->tt->end_io(rqd); } diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c index cb30ccf..8deef2e 100644 --- a/drivers/lightnvm/rrpc.c +++ b/drivers/lightnvm/rrpc.c @@ -716,6 +716,34 @@ static void rrpc_run_gc(struct rrpc *rrpc, struct rrpc_block *rblk) queue_work(rrpc->kgc_wq, &gcb->ws_gc); } +static void __rrpc_mark_bad_block(struct nvm_dev *dev, struct ppa_addr *ppa) +{ + nvm_mark_blk(dev, *ppa, NVM_BLK_ST_BAD); + nvm_set_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD); +} + +static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd) +{ + struct nvm_dev *dev = rrpc->dev; + void *comp_bits = &rqd->ppa_status; + struct ppa_addr ppa, prev_ppa; + int nr_ppas = rqd->nr_ppas; + int bit; + + if (rqd->nr_ppas == 1) + __rrpc_mark_bad_block(dev, &rqd->ppa_addr); + + ppa_set_empty(&prev_ppa); + bit = -1; + while ((bit = find_next_bit(comp_bits, nr_ppas, bit + 1)) < nr_ppas) { + ppa = rqd->ppa_list[bit]; + if (ppa_cmp_blk(ppa, prev_ppa)) + continue; + + __rrpc_mark_bad_block(dev, &ppa); + } +} + static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd, sector_t laddr, uint8_t npages) { @@ -742,8 +770,12 @@ static void rrpc_end_io(struct nvm_rq *rqd) uint8_t npages = rqd->nr_ppas; sector_t laddr = rrpc_get_laddr(rqd->bio) - npages; - if (bio_data_dir(rqd->bio) == WRITE) + if (bio_data_dir(rqd->bio) == WRITE) { + if (rqd->error == NVM_RSP_ERR_FAILWRITE) + rrpc_mark_bad_block(rrpc, rqd); + rrpc_end_io_write(rrpc, rrqd, laddr, npages); + } bio_put(rqd->bio); diff --git a/drivers/lightnvm/sysblk.c b/drivers/lightnvm/sysblk.c index d229067..fa644af 100644 --- a/drivers/lightnvm/sysblk.c +++ b/drivers/lightnvm/sysblk.c @@ -267,29 +267,10 @@ static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa, return found; } -static int nvm_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, int type) +static int nvm_sysblk_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, + int type) { - struct nvm_rq rqd; - int ret; - - if (s->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, s->ppas, s->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; + 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, @@ -573,7 +554,7 @@ int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) if (ret) goto err_mark; - ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_HOST); + ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_HOST); if (ret) goto err_mark; @@ -733,7 +714,7 @@ int nvm_dev_factory(struct nvm_dev *dev, int flags) mutex_lock(&dev->mlock); ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); if (!ret) - ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_FREE); + ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_FREE); mutex_unlock(&dev->mlock); } err_ppas: diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 1957829..e3ccaff 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -425,6 +425,19 @@ static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev, return ppa; } +static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2) +{ + if (ppa_empty(ppa1) || ppa_empty(ppa2)) + return 0; + + + if ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) && + (ppa1.g.blk == ppa2.g.blk)) + return 1; + + return 0; +} + static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg) { return dev->lptbl[slc_pg]; @@ -538,7 +551,9 @@ extern struct nvm_dev *nvm_alloc_dev(int); extern int nvm_register(struct nvm_dev *); extern void nvm_unregister(struct nvm_dev *); -void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type); +extern void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type); +extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, + int nr_ppas, int type); extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *); extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *); -- 2.7.4