[PATCH 15/15] lightnvm: pblk: implement 2.0 support

From: Javier GonzÃlez
Date: Wed Feb 28 2018 - 12:09:34 EST

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Implement 2.0 support in pblk. This includes the address formatting and
mapping paths, as well as the sysfs entries for them.

Signed-off-by: Javier GonzÃlez <javier@xxxxxxxxxxxx>
---
drivers/lightnvm/pblk-init.c | 57 ++++++++++--
drivers/lightnvm/pblk-sysfs.c | 36 ++++++--
drivers/lightnvm/pblk.h | 198 ++++++++++++++++++++++++++++++++----------
3 files changed, 233 insertions(+), 58 deletions(-)

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index b3e15ef63df3..474f3f047087 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -231,20 +231,63 @@ static int pblk_set_addrf_12(struct nvm_geo *geo,
return dst->blk_offset + src->blk_len;
}

+static int pblk_set_addrf_20(struct nvm_geo *geo,
+ struct nvm_addr_format *adst,
+ struct pblk_addr_format *udst)
+{
+ struct nvm_addr_format *src = &geo->addrf;
+
+ adst->ch_len = get_count_order(geo->num_ch);
+ adst->lun_len = get_count_order(geo->num_lun);
+ adst->chk_len = src->chk_len;
+ adst->sec_len = src->sec_len;
+
+ adst->sec_offset = 0;
+ adst->ch_offset = adst->sec_len;
+ adst->lun_offset = adst->ch_offset + adst->ch_len;
+ adst->chk_offset = adst->lun_offset + adst->lun_len;
+
+ adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset;
+ adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset;
+ adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset;
+ adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset;
+
+ udst->sec_stripe = geo->ws_opt;
+ udst->ch_stripe = geo->num_ch;
+ udst->lun_stripe = geo->num_lun;
+
+ udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe;
+ udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe;
+
+ return adst->chk_offset + adst->chk_len;
+}
+
static int pblk_set_addrf(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
int mod;

- div_u64_rem(geo->clba, pblk->min_write_pgs, &mod);
- if (mod) {
- pr_err("pblk: bad configuration of sectors/pages\n");
+ switch (geo->version) {
+ case NVM_OCSSD_SPEC_12:
+ div_u64_rem(geo->clba, pblk->min_write_pgs, &mod);
+ if (mod) {
+ pr_err("pblk: bad configuration of sectors/pages\n");
+ return -EINVAL;
+ }
+
+ pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf);
+ break;
+ case NVM_OCSSD_SPEC_20:
+ pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf,
+ &pblk->uaddrf);
+ break;
+ default:
+ pr_err("pblk: OCSSD revision not supported (%d)\n",
+ geo->version);
return -EINVAL;
}

- pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf);
-
return 0;
}

@@ -1117,7 +1160,9 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
struct pblk *pblk;
int ret;

- if (geo->version != NVM_OCSSD_SPEC_12) {
+ /* pblk supports 1.2 and 2.0 versions */
+ if (!(geo->version == NVM_OCSSD_SPEC_12 ||
+ geo->version == NVM_OCSSD_SPEC_20)) {
pr_err("pblk: OCSSD version not supported (%u)\n",
geo->version);
return ERR_PTR(-EINVAL);
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
index a643dc623731..391f865b02d9 100644
--- a/drivers/lightnvm/pblk-sysfs.c
+++ b/drivers/lightnvm/pblk-sysfs.c
@@ -113,15 +113,16 @@ static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
- struct nvm_addr_format_12 *ppaf;
- struct nvm_addr_format_12 *geo_ppaf;
ssize_t sz = 0;

- ppaf = (struct nvm_addr_format_12 *)&pblk->addrf;
- geo_ppaf = (struct nvm_addr_format_12 *)&geo->addrf;
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ struct nvm_addr_format_12 *ppaf =
+ (struct nvm_addr_format_12 *)&pblk->addrf;
+ struct nvm_addr_format_12 *geo_ppaf =
+ (struct nvm_addr_format_12 *)&geo->addrf;

- sz = snprintf(page, PAGE_SIZE,
- "pblk:(s:%d)ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
+ sz = snprintf(page, PAGE_SIZE,
+ "pblk:(s:%d)ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
pblk->addrf_len,
ppaf->ch_offset, ppaf->ch_len,
ppaf->lun_offset, ppaf->lun_len,
@@ -130,14 +131,33 @@ static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
ppaf->pln_offset, ppaf->pln_len,
ppaf->sec_offset, ppaf->sec_len);

- sz += snprintf(page + sz, PAGE_SIZE - sz,
- "device:ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
+ sz += snprintf(page + sz, PAGE_SIZE - sz,
+ "device:ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
geo_ppaf->ch_offset, geo_ppaf->ch_len,
geo_ppaf->lun_offset, geo_ppaf->lun_len,
geo_ppaf->blk_offset, geo_ppaf->blk_len,
geo_ppaf->pg_offset, geo_ppaf->pg_len,
geo_ppaf->pln_offset, geo_ppaf->pln_len,
geo_ppaf->sec_offset, geo_ppaf->sec_len);
+ } else {
+ struct nvm_addr_format *ppaf = &pblk->addrf;
+ struct nvm_addr_format *geo_ppaf = &geo->addrf;
+
+ sz = snprintf(page, PAGE_SIZE,
+ "pblk:(s:%d)ch:%d/%d,lun:%d/%d,chk:%d/%d/sec:%d/%d\n",
+ pblk->addrf_len,
+ ppaf->ch_offset, ppaf->ch_len,
+ ppaf->lun_offset, ppaf->lun_len,
+ ppaf->chk_offset, ppaf->chk_len,
+ ppaf->sec_offset, ppaf->sec_len);
+
+ sz += snprintf(page + sz, PAGE_SIZE - sz,
+ "device:ch:%d/%d,lun:%d/%d,chk:%d/%d,sec:%d/%d\n",
+ geo_ppaf->ch_offset, geo_ppaf->ch_len,
+ geo_ppaf->lun_offset, geo_ppaf->lun_len,
+ geo_ppaf->chk_offset, geo_ppaf->chk_len,
+ geo_ppaf->sec_offset, geo_ppaf->sec_len);
+ }

return sz;
}
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index ee149766b7a0..1deddd38c0ac 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -561,6 +561,18 @@ enum {
PBLK_STATE_STOPPED = 3,
};

+/* Internal format to support not power-of-2 device formats */
+struct pblk_addr_format {
+ /* gen to dev */
+ int sec_stripe;
+ int ch_stripe;
+ int lun_stripe;
+
+ /* dev to gen */
+ int sec_lun_stripe;
+ int sec_ws_stripe;
+};
+
struct pblk {
struct nvm_tgt_dev *dev;
struct gendisk *disk;
@@ -573,7 +585,8 @@ struct pblk {
struct pblk_line_mgmt l_mg; /* Line management */
struct pblk_line_meta lm; /* Line metadata */

- struct nvm_addr_format addrf;
+ struct nvm_addr_format addrf; /* Aligned address format */
+ struct pblk_addr_format uaddrf; /* Unaligned address format */
int addrf_len;

struct pblk_rb rwb;
@@ -954,17 +967,43 @@ static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
u64 line_id)
{
- struct nvm_addr_format_12 *ppaf =
- (struct nvm_addr_format_12 *)&pblk->addrf;
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
struct ppa_addr ppa;

- ppa.ppa = 0;
- ppa.g.blk = line_id;
- ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
- ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
- ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
- ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
- ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ struct nvm_addr_format_12 *ppaf =
+ (struct nvm_addr_format_12 *)&pblk->addrf;
+
+ ppa.ppa = 0;
+ ppa.g.blk = line_id;
+ ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
+ ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
+ ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
+ ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
+ ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
+ } else {
+ struct pblk_addr_format *uaddrf = &pblk->uaddrf;
+ int secs, chnls, luns;
+
+ ppa.ppa = 0;
+
+ ppa.m.chk = line_id;
+
+ div_u64_rem(paddr, uaddrf->sec_stripe, &secs);
+ ppa.m.sec = secs;
+
+ sector_div(paddr, uaddrf->sec_stripe);
+ div_u64_rem(paddr, uaddrf->ch_stripe, &chnls);
+ ppa.m.grp = chnls;
+
+ sector_div(paddr, uaddrf->ch_stripe);
+ div_u64_rem(paddr, uaddrf->lun_stripe, &luns);
+ ppa.m.pu = luns;
+
+ sector_div(paddr, uaddrf->lun_stripe);
+ ppa.m.sec += uaddrf->sec_stripe * paddr;
+ }

return ppa;
}
@@ -972,15 +1011,32 @@ static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
struct ppa_addr p)
{
- struct nvm_addr_format_12 *ppaf =
- (struct nvm_addr_format_12 *)&pblk->addrf;
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
u64 paddr;

- paddr = (u64)p.g.ch << ppaf->ch_offset;
- paddr |= (u64)p.g.lun << ppaf->lun_offset;
- paddr |= (u64)p.g.pg << ppaf->pg_offset;
- paddr |= (u64)p.g.pl << ppaf->pln_offset;
- paddr |= (u64)p.g.sec << ppaf->sec_offset;
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ struct nvm_addr_format_12 *ppaf =
+ (struct nvm_addr_format_12 *)&pblk->addrf;
+
+ paddr = (u64)p.g.ch << ppaf->ch_offset;
+ paddr |= (u64)p.g.lun << ppaf->lun_offset;
+ paddr |= (u64)p.g.pg << ppaf->pg_offset;
+ paddr |= (u64)p.g.pl << ppaf->pln_offset;
+ paddr |= (u64)p.g.sec << ppaf->sec_offset;
+ } else {
+ struct pblk_addr_format *uaddrf = &pblk->uaddrf;
+ u64 secs = (u64)p.m.sec;
+ int sec_stripe;
+
+ paddr = (u64)p.m.grp * uaddrf->sec_stripe;
+ paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe;
+
+ div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe);
+ sector_div(secs, uaddrf->sec_stripe);
+ paddr += secs * uaddrf->sec_ws_stripe;
+ paddr += sec_stripe;
+ }

return paddr;
}
@@ -997,15 +1053,37 @@ static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
ppa64.c.line = ppa32 & ((~0U) >> 1);
ppa64.c.is_cached = 1;
} else {
- struct nvm_addr_format_12 *ppaf =
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ struct nvm_addr_format_12 *ppaf =
(struct nvm_addr_format_12 *)&pblk->addrf;

- ppa64.g.ch = (ppa32 & ppaf->ch_mask) >> ppaf->ch_offset;
- ppa64.g.lun = (ppa32 & ppaf->lun_mask) >> ppaf->lun_offset;
- ppa64.g.blk = (ppa32 & ppaf->blk_mask) >> ppaf->blk_offset;
- ppa64.g.pg = (ppa32 & ppaf->pg_mask) >> ppaf->pg_offset;
- ppa64.g.pl = (ppa32 & ppaf->pln_mask) >> ppaf->pln_offset;
- ppa64.g.sec = (ppa32 & ppaf->sec_mask) >> ppaf->sec_offset;
+ ppa64.g.ch = (ppa32 & ppaf->ch_mask) >>
+ ppaf->ch_offset;
+ ppa64.g.lun = (ppa32 & ppaf->lun_mask) >>
+ ppaf->lun_offset;
+ ppa64.g.blk = (ppa32 & ppaf->blk_mask) >>
+ ppaf->blk_offset;
+ ppa64.g.pg = (ppa32 & ppaf->pg_mask) >>
+ ppaf->pg_offset;
+ ppa64.g.pl = (ppa32 & ppaf->pln_mask) >>
+ ppaf->pln_offset;
+ ppa64.g.sec = (ppa32 & ppaf->sec_mask) >>
+ ppaf->sec_offset;
+ } else {
+ struct nvm_addr_format *lbaf = &pblk->addrf;
+
+ ppa64.m.grp = (ppa32 & lbaf->ch_mask) >>
+ lbaf->ch_offset;
+ ppa64.m.pu = (ppa32 & lbaf->lun_mask) >>
+ lbaf->lun_offset;
+ ppa64.m.chk = (ppa32 & lbaf->chk_mask) >>
+ lbaf->chk_offset;
+ ppa64.m.sec = (ppa32 & lbaf->sec_mask) >>
+ lbaf->sec_offset;
+ }
}

return ppa64;
@@ -1021,15 +1099,27 @@ static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
ppa32 |= ppa64.c.line;
ppa32 |= 1U << 31;
} else {
- struct nvm_addr_format_12 *ppaf =
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ struct nvm_addr_format_12 *ppaf =
(struct nvm_addr_format_12 *)&pblk->addrf;

- ppa32 |= ppa64.g.ch << ppaf->ch_offset;
- ppa32 |= ppa64.g.lun << ppaf->lun_offset;
- ppa32 |= ppa64.g.blk << ppaf->blk_offset;
- ppa32 |= ppa64.g.pg << ppaf->pg_offset;
- ppa32 |= ppa64.g.pl << ppaf->pln_offset;
- ppa32 |= ppa64.g.sec << ppaf->sec_offset;
+ ppa32 |= ppa64.g.ch << ppaf->ch_offset;
+ ppa32 |= ppa64.g.lun << ppaf->lun_offset;
+ ppa32 |= ppa64.g.blk << ppaf->blk_offset;
+ ppa32 |= ppa64.g.pg << ppaf->pg_offset;
+ ppa32 |= ppa64.g.pl << ppaf->pln_offset;
+ ppa32 |= ppa64.g.sec << ppaf->sec_offset;
+ } else {
+ struct nvm_addr_format *lbaf = &pblk->addrf;
+
+ ppa32 |= ppa64.m.grp << lbaf->ch_offset;
+ ppa32 |= ppa64.m.pu << lbaf->lun_offset;
+ ppa32 |= ppa64.m.chk << lbaf->chk_offset;
+ ppa32 |= ppa64.m.sec << lbaf->sec_offset;
+ }
}

return ppa32;
@@ -1147,6 +1237,9 @@ static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
struct nvm_geo *geo = &dev->geo;
int flags;

+ if (geo->version == NVM_OCSSD_SPEC_20)
+ return 0;
+
flags = geo->pln_mode >> 1;

if (type == PBLK_WRITE)
@@ -1166,6 +1259,9 @@ static inline int pblk_set_read_mode(struct pblk *pblk, int type)
struct nvm_geo *geo = &dev->geo;
int flags;

+ if (geo->version == NVM_OCSSD_SPEC_20)
+ return 0;
+
flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
if (type == PBLK_READ_SEQUENTIAL)
flags |= geo->pln_mode >> 1;
@@ -1179,16 +1275,21 @@ static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
}

#ifdef CONFIG_NVM_DEBUG
-static inline void print_ppa(struct ppa_addr *p, char *msg, int error)
+static inline void print_ppa(struct nvm_geo *geo, struct ppa_addr *p,
+ char *msg, int error)
{
if (p->c.is_cached) {
pr_err("ppa: (%s: %x) cache line: %llu\n",
msg, error, (u64)p->c.line);
- } else {
+ } else if (geo->version == NVM_OCSSD_SPEC_12) {
pr_err("ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
msg, error,
p->g.ch, p->g.lun, p->g.blk,
p->g.pg, p->g.pl, p->g.sec);
+ } else {
+ pr_err("ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n",
+ msg, error,
+ p->m.grp, p->m.pu, p->m.chk, p->m.sec);
}
}

@@ -1198,13 +1299,13 @@ static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
int bit = -1;

if (rqd->nr_ppas == 1) {
- print_ppa(&rqd->ppa_addr, "rqd", error);
+ print_ppa(&pblk->dev->geo, &rqd->ppa_addr, "rqd", error);
return;
}

while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
bit + 1)) < rqd->nr_ppas) {
- print_ppa(&rqd->ppa_list[bit], "rqd", error);
+ print_ppa(&pblk->dev->geo, &rqd->ppa_list[bit], "rqd", error);
}

pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
@@ -1220,16 +1321,25 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
for (i = 0; i < nr_ppas; i++) {
ppa = &ppas[i];

- if (!ppa->c.is_cached &&
- ppa->g.ch < geo->num_ch &&
- ppa->g.lun < geo->num_lun &&
- ppa->g.pl < geo->num_pln &&
- ppa->g.blk < geo->num_chk &&
- ppa->g.pg < geo->num_pg &&
- ppa->g.sec < geo->ws_min)
- continue;
+ if (geo->version == NVM_OCSSD_SPEC_12) {
+ if (!ppa->c.is_cached &&
+ ppa->g.ch < geo->num_ch &&
+ ppa->g.lun < geo->num_lun &&
+ ppa->g.pl < geo->num_pln &&
+ ppa->g.blk < geo->num_chk &&
+ ppa->g.pg < geo->num_pg &&
+ ppa->g.sec < geo->ws_min)
+ continue;
+ } else {
+ if (!ppa->c.is_cached &&
+ ppa->m.grp < geo->num_ch &&
+ ppa->m.pu < geo->num_lun &&
+ ppa->m.chk < geo->num_chk &&
+ ppa->m.sec < geo->clba)
+ continue;
+ }

- print_ppa(ppa, "boundary", i);
+ print_ppa(geo, ppa, "boundary", i);

return 1;
}
--
2.7.4

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