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Date: Fri, 18 Nov 2016 15:43:25 +0100
From: "Javier González" <jg@...htnvm.io>
To: mb@...htnvm.io
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
Javier González <jg@...htnvm.io>,
Javier González <javier@...xlabs.com>,
Matias Bjørling <m@...rling.me>
Subject: [PATCH 03/20] lightnvm: export set bad block table
From: Javier González <jg@...htnvm.io>
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 <javier@...xlabs.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
---
drivers/lightnvm/core.c | 27 +++++++++++++++++++++++++++
drivers/lightnvm/gennvm.c | 24 ------------------------
drivers/lightnvm/rrpc.c | 34 +++++++++++++++++++++++++++++++++-
drivers/lightnvm/sysblk.c | 29 +++++------------------------
include/linux/lightnvm.h | 13 ++++++++++++-
5 files changed, 77 insertions(+), 50 deletions(-)
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 8664fe0..6527cf6 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -196,6 +196,33 @@ 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 a7e17fa..e969e3a 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -543,34 +543,10 @@ 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);
-
ins->tt->end_io(rqd);
}
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 067e890..2b71b7e 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -675,6 +675,34 @@ 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)
{
@@ -701,8 +729,12 @@ 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 d87be02..4480d1c 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -423,6 +423,15 @@ 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;
+
+ return ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) &&
+ (ppa1.g.blk == ppa2.g.blk));
+}
+
static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
{
return dev->lptbl[slc_pg];
@@ -528,7 +537,9 @@ 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
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