summaryrefslogtreecommitdiffstats
path: root/drivers/lightnvm/pblk-read.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/lightnvm/pblk-read.c')
-rw-r--r--drivers/lightnvm/pblk-read.c65
1 files changed, 28 insertions, 37 deletions
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index f770fd113ffe..18694694e5f0 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -39,10 +39,10 @@ static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio,
}
static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
- sector_t blba, unsigned long *read_bitmap)
+ struct bio *bio, sector_t blba,
+ unsigned long *read_bitmap)
{
struct pblk_sec_meta *meta_list = rqd->meta_list;
- struct bio *bio = rqd->bio;
struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS];
int nr_secs = rqd->nr_ppas;
bool advanced_bio = false;
@@ -189,7 +189,6 @@ static void pblk_end_user_read(struct bio *bio)
WARN_ONCE(bio->bi_status, "pblk: corrupted read bio\n");
#endif
bio_endio(bio);
- bio_put(bio);
}
static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
@@ -197,23 +196,18 @@ static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
{
struct nvm_tgt_dev *dev = pblk->dev;
struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
- struct bio *bio = rqd->bio;
+ struct bio *int_bio = rqd->bio;
unsigned long start_time = r_ctx->start_time;
generic_end_io_acct(dev->q, READ, &pblk->disk->part0, start_time);
if (rqd->error)
pblk_log_read_err(pblk, rqd);
-#ifdef CONFIG_NVM_DEBUG
- else
- WARN_ONCE(bio->bi_status, "pblk: corrupted read error\n");
-#endif
pblk_read_check_seq(pblk, rqd, r_ctx->lba);
- bio_put(bio);
- if (r_ctx->private)
- pblk_end_user_read((struct bio *)r_ctx->private);
+ if (int_bio)
+ bio_put(int_bio);
if (put_line)
pblk_read_put_rqd_kref(pblk, rqd);
@@ -230,16 +224,19 @@ static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
static void pblk_end_io_read(struct nvm_rq *rqd)
{
struct pblk *pblk = rqd->private;
+ struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
+ struct bio *bio = (struct bio *)r_ctx->private;
+ pblk_end_user_read(bio);
__pblk_end_io_read(pblk, rqd, true);
}
-static int pblk_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned int bio_init_idx,
- unsigned long *read_bitmap)
+static int pblk_partial_read(struct pblk *pblk, struct nvm_rq *rqd,
+ struct bio *orig_bio, unsigned int bio_init_idx,
+ unsigned long *read_bitmap)
{
- struct bio *new_bio, *bio = rqd->bio;
struct pblk_sec_meta *meta_list = rqd->meta_list;
+ struct bio *new_bio;
struct bio_vec src_bv, dst_bv;
void *ppa_ptr = NULL;
void *src_p, *dst_p;
@@ -256,11 +253,11 @@ static int pblk_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
new_bio = bio_alloc(GFP_KERNEL, nr_holes);
if (pblk_bio_add_pages(pblk, new_bio, GFP_KERNEL, nr_holes))
- goto err_add_pages;
+ goto fail_add_pages;
if (nr_holes != new_bio->bi_vcnt) {
pr_err("pblk: malformed bio\n");
- goto err;
+ goto fail;
}
for (i = 0; i < nr_secs; i++)
@@ -283,7 +280,7 @@ static int pblk_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
if (ret) {
bio_put(rqd->bio);
pr_err("pblk: sync read IO submission failed\n");
- goto err;
+ goto fail;
}
if (rqd->error) {
@@ -319,7 +316,7 @@ static int pblk_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
meta_list[hole].lba = lba_list_media[i];
src_bv = new_bio->bi_io_vec[i++];
- dst_bv = bio->bi_io_vec[bio_init_idx + hole];
+ dst_bv = orig_bio->bi_io_vec[bio_init_idx + hole];
src_p = kmap_atomic(src_bv.bv_page);
dst_p = kmap_atomic(dst_bv.bv_page);
@@ -338,28 +335,26 @@ static int pblk_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
bio_put(new_bio);
- /* Complete the original bio and associated request */
- bio_endio(bio);
- rqd->bio = bio;
+ /* restore original request */
+ rqd->bio = NULL;
rqd->nr_ppas = nr_secs;
__pblk_end_io_read(pblk, rqd, false);
- return NVM_IO_OK;
+ return NVM_IO_DONE;
-err:
+fail:
/* Free allocated pages in new bio */
pblk_bio_free_pages(pblk, new_bio, 0, new_bio->bi_vcnt);
-err_add_pages:
+fail_add_pages:
pr_err("pblk: failed to perform partial read\n");
__pblk_end_io_read(pblk, rqd, false);
return NVM_IO_ERR;
}
-static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
+static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd, struct bio *bio,
sector_t lba, unsigned long *read_bitmap)
{
struct pblk_sec_meta *meta_list = rqd->meta_list;
- struct bio *bio = rqd->bio;
struct ppa_addr ppa;
pblk_lookup_l2p_seq(pblk, &ppa, lba, 1);
@@ -423,14 +418,15 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd = pblk_alloc_rqd(pblk, PBLK_READ);
rqd->opcode = NVM_OP_PREAD;
- rqd->bio = bio;
rqd->nr_ppas = nr_secs;
+ rqd->bio = NULL; /* cloned bio if needed */
rqd->private = pblk;
rqd->end_io = pblk_end_io_read;
r_ctx = nvm_rq_to_pdu(rqd);
r_ctx->start_time = jiffies;
r_ctx->lba = blba;
+ r_ctx->private = bio; /* original bio */
/* Save the index for this bio's start. This is needed in case
* we need to fill a partial read.
@@ -448,17 +444,15 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size;
rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size;
- pblk_read_ppalist_rq(pblk, rqd, blba, &read_bitmap);
+ pblk_read_ppalist_rq(pblk, rqd, bio, blba, &read_bitmap);
} else {
- pblk_read_rq(pblk, rqd, blba, &read_bitmap);
+ pblk_read_rq(pblk, rqd, bio, blba, &read_bitmap);
}
- bio_get(bio);
if (bitmap_full(&read_bitmap, nr_secs)) {
- bio_endio(bio);
atomic_inc(&pblk->inflight_io);
__pblk_end_io_read(pblk, rqd, false);
- return NVM_IO_OK;
+ return NVM_IO_DONE;
}
/* All sectors are to be read from the device */
@@ -473,13 +467,10 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
}
rqd->bio = int_bio;
- r_ctx->private = bio;
if (pblk_submit_io(pblk, rqd)) {
pr_err("pblk: read IO submission failed\n");
ret = NVM_IO_ERR;
- if (int_bio)
- bio_put(int_bio);
goto fail_end_io;
}
@@ -489,7 +480,7 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
/* The read bio request could be partially filled by the write buffer,
* but there are some holes that need to be read from the drive.
*/
- return pblk_partial_read_bio(pblk, rqd, bio_init_idx, &read_bitmap);
+ return pblk_partial_read(pblk, rqd, bio, bio_init_idx, &read_bitmap);
fail_rqd_free:
pblk_free_rqd(pblk, rqd, PBLK_READ);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 06:06:36 +0000