[GIT PULL 12/45] lightnvm: pblk: improve line helpers

From: Matias BjÃrling
Date: Tue Oct 09 2018 - 07:13:57 EST


From: Javier GonzÃlez <javier@xxxxxxxxxxx>

The current helper to obtain a line from a ppa returns the line id,
which requires its users to explicitly retrieve the pointer to the line
with the id.

Make 2 different helpers: one returning the line id and one returning
the line directly.

Signed-off-by: Javier GonzÃlez <javier@xxxxxxxxxxxx>
Signed-off-by: Matias BjÃrling <mb@xxxxxxxxxxx>
---
drivers/lightnvm/pblk-core.c | 15 ++++++---------
drivers/lightnvm/pblk-rb.c | 2 +-
drivers/lightnvm/pblk-read.c | 4 ++--
drivers/lightnvm/pblk-write.c | 4 ++--
drivers/lightnvm/pblk.h | 13 +++++++++----
5 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 5f99cf396072..36ac9eff8ebd 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -32,7 +32,7 @@ static void pblk_line_mark_bb(struct work_struct *work)
struct pblk_line *line;
int pos;

- line = &pblk->lines[pblk_ppa_to_line(*ppa)];
+ line = pblk_ppa_to_line(pblk, *ppa);
pos = pblk_ppa_to_pos(&dev->geo, *ppa);

pblk_err(pblk, "failed to mark bb, line:%d, pos:%d\n",
@@ -80,7 +80,7 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
struct pblk_line *line;
int pos;

- line = &pblk->lines[pblk_ppa_to_line(rqd->ppa_addr)];
+ line = pblk_ppa_to_line(pblk, rqd->ppa_addr);
pos = pblk_ppa_to_pos(geo, rqd->ppa_addr);
chunk = &line->chks[pos];

@@ -192,7 +192,6 @@ void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
{
struct pblk_line *line;
u64 paddr;
- int line_id;

#ifdef CONFIG_NVM_PBLK_DEBUG
/* Callers must ensure that the ppa points to a device address */
@@ -200,8 +199,7 @@ void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
BUG_ON(pblk_ppa_empty(ppa));
#endif

- line_id = pblk_ppa_to_line(ppa);
- line = &pblk->lines[line_id];
+ line = pblk_ppa_to_line(pblk, ppa);
paddr = pblk_dev_ppa_to_line_addr(pblk, ppa);

__pblk_map_invalidate(pblk, line, paddr);
@@ -1430,7 +1428,7 @@ void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa)
{
struct pblk_line *line;

- line = &pblk->lines[pblk_ppa_to_line(ppa)];
+ line = pblk_ppa_to_line(pblk, ppa);
kref_put(&line->ref, pblk_line_put_wq);
}

@@ -1688,7 +1686,7 @@ int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
struct nvm_geo *geo = &dev->geo;

pblk_err(pblk, "could not async erase line:%d,blk:%d\n",
- pblk_ppa_to_line(ppa),
+ pblk_ppa_to_line_id(ppa),
pblk_ppa_to_pos(geo, ppa));
}

@@ -2059,8 +2057,7 @@ void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,

/* If the L2P entry maps to a line, the reference is valid */
if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) {
- int line_id = pblk_ppa_to_line(ppa);
- struct pblk_line *line = &pblk->lines[line_id];
+ struct pblk_line *line = pblk_ppa_to_line(pblk, ppa);

kref_get(&line->ref);
}
diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c
index f6eec0212dfc..a7648e12f54f 100644
--- a/drivers/lightnvm/pblk-rb.c
+++ b/drivers/lightnvm/pblk-rb.c
@@ -225,7 +225,7 @@ static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int to_update)
pblk_update_map_dev(pblk, w_ctx->lba, w_ctx->ppa,
entry->cacheline);

- line = &pblk->lines[pblk_ppa_to_line(w_ctx->ppa)];
+ line = pblk_ppa_to_line(pblk, w_ctx->ppa);
kref_put(&line->ref, pblk_line_put);
clean_wctx(w_ctx);
rb->l2p_update = (rb->l2p_update + 1) & (rb->nr_entries - 1);
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index ad1d7713bbda..49744caaa300 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -252,9 +252,9 @@ static void pblk_end_partial_read(struct nvm_rq *rqd)
i = 0;
hole = find_first_zero_bit(read_bitmap, nr_secs);
do {
- int line_id = pblk_ppa_to_line(rqd->ppa_list[i]);
- struct pblk_line *line = &pblk->lines[line_id];
+ struct pblk_line *line;

+ line = pblk_ppa_to_line(pblk, rqd->ppa_list[i]);
kref_put(&line->ref, pblk_line_put);

meta_list[hole].lba = lba_list_media[i];
diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index df99c45778d4..c23b65aaa27b 100644
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -113,7 +113,7 @@ static void pblk_map_remaining(struct pblk *pblk, struct ppa_addr *ppa)
u64 paddr;
int done = 0;

- line = &pblk->lines[pblk_ppa_to_line(*ppa)];
+ line = pblk_ppa_to_line(pblk, *ppa);
spin_lock(&line->lock);

while (!done) {
@@ -171,7 +171,7 @@ static void pblk_prepare_resubmit(struct pblk *pblk, unsigned int sentry,
/* Decrese the reference count to the line as we will
* re-map these entries
*/
- line = &pblk->lines[pblk_ppa_to_line(w_ctx->ppa)];
+ line = pblk_ppa_to_line(pblk, w_ctx->ppa);
kref_put(&line->ref, pblk_line_put);

pos = (pos + 1) & (rb->nr_entries - 1);
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index f95fe75fef6e..af9477b7e803 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -984,11 +984,17 @@ static inline int pblk_pad_distance(struct pblk *pblk)
return geo->mw_cunits * geo->all_luns * geo->ws_opt;
}

-static inline int pblk_ppa_to_line(struct ppa_addr p)
+static inline int pblk_ppa_to_line_id(struct ppa_addr p)
{
return p.a.blk;
}

+static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk,
+ struct ppa_addr p)
+{
+ return &pblk->lines[pblk_ppa_to_line_id(p)];
+}
+
static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
{
return p.a.lun * geo->num_ch + p.a.ch;
@@ -1039,7 +1045,7 @@ static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk,
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
- struct pblk_line *line = &pblk->lines[pblk_ppa_to_line(p)];
+ struct pblk_line *line = pblk_ppa_to_line(pblk, p);
int pos = pblk_ppa_to_pos(geo, p);

return &line->chks[pos];
@@ -1371,8 +1377,7 @@ static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
int i;

for (i = 0; i < rqd->nr_ppas; i++) {
- ppa = ppa_list[i];
- line = &pblk->lines[pblk_ppa_to_line(ppa)];
+ line = pblk_ppa_to_line(pblk, ppa_list[i]);

spin_lock(&line->lock);
if (line->state != PBLK_LINESTATE_OPEN) {
--
2.17.1