xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

lightnvm: implement generic path for sync I/O

Browse Source 
Implement a generic path for sending sync I/O on LightNVM. This allows
to reuse the standard synchronous path trough blk_execute_rq(), instead
of implementing a wait_for_completion on the target side (e.g., pblk).

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González
2017-10-13 14:46:47 +02:00
committed by Jens Axboe
parent 1b839187db
commit 1a94b2d484
7 changed files with 145 additions and 125 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/lightnvm/pblk-recovery.c
View File

@@ -216,7 +216,6 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
int rq_ppas, rq_len;
int i, j;
int ret = 0;
DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -253,8 +252,6 @@ next_read_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
rqd->end_io = pblk_end_io_sync;
rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -280,19 +277,13 @@ next_read_rq:
}
/* If read fails, more padding is needed */
ret = pblk_submit_io(pblk, rqd);
ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
return ret;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: L2P recovery read timed out\n");
return -EINTR;
}
atomic_dec(&pblk->inflight_io);
reinit_completion(&wait);
/* At this point, the read should not fail. If it does, it is a problem
* we cannot recover from here. Need FTL log.
@@ -504,7 +495,6 @@ static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line,
int ret = 0;
int rec_round;
int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec;
DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -539,8 +529,6 @@ next_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
rqd->end_io = pblk_end_io_sync;
rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -566,18 +554,13 @@ next_rq:
addr_to_gen_ppa(pblk, w_ptr, line->id);
}
ret = pblk_submit_io(pblk, rqd);
ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
return ret;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: L2P recovery read timed out\n");
}
atomic_dec(&pblk->inflight_io);
reinit_completion(&wait);
/* This should not happen since the read failed during normal recovery,
* but the media works funny sometimes...
@@ -645,7 +628,6 @@ static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line,
int i, j;
int ret = 0;
int left_ppas = pblk_calc_sec_in_line(pblk, line);
DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -678,8 +660,6 @@ next_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
rqd->end_io = pblk_end_io_sync;
rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -705,19 +685,14 @@ next_rq:
addr_to_gen_ppa(pblk, paddr, line->id);
}
ret = pblk_submit_io(pblk, rqd);
ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
bio_put(bio);
return ret;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: L2P recovery read timed out\n");
}
atomic_dec(&pblk->inflight_io);
reinit_completion(&wait);
/* Reached the end of the written line */
if (rqd->error) {