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lightnvm: implement generic path for sync I/O 

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>
hifive-unleashed-5.1
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
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25
drivers/lightnvm/core.c
View File

@ -720,12 +720,25 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
static void nvm_end_io_sync(struct nvm_rq *rqd)
int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
struct completion *waiting = rqd->private;
struct nvm_dev *dev = tgt_dev->parent;
int ret;
complete(waiting);
if (!dev->ops->submit_io_sync)
return -ENODEV;
nvm_rq_tgt_to_dev(tgt_dev, rqd);
rqd->dev = tgt_dev;
/* In case of error, fail with right address format */
ret = dev->ops->submit_io_sync(dev, rqd);
nvm_rq_dev_to_tgt(tgt_dev, rqd);
return ret;
}
EXPORT_SYMBOL(nvm_submit_io_sync);
int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas)
@ -733,25 +746,21 @@ int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
struct nvm_geo *geo = &tgt_dev->geo;
struct nvm_rq rqd;
int ret;
DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
rqd.opcode = NVM_OP_ERASE;
rqd.end_io = nvm_end_io_sync;
rqd.private = &wait;
rqd.flags = geo->plane_mode >> 1;
ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
if (ret)
return ret;
ret = nvm_submit_io(tgt_dev, &rqd);
ret = nvm_submit_io_sync(tgt_dev, &rqd);
if (ret) {
pr_err("rrpr: erase I/O submission failed: %d\n", ret);
goto free_ppa_list;
}
wait_for_completion_io(&wait);
free_ppa_list:
nvm_free_rqd_ppalist(tgt_dev, &rqd);

78
drivers/lightnvm/pblk-core.c
View File

@ -412,34 +412,11 @@ int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
struct nvm_tgt_dev *dev = pblk->dev;
#ifdef CONFIG_NVM_DEBUG
struct ppa_addr *ppa_list;
int ret;
ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
WARN_ON(1);
return -EINVAL;
}
if (rqd->opcode == NVM_OP_PWRITE) {
struct pblk_line *line;
struct ppa_addr ppa;
int i;
for (i = 0; i < rqd->nr_ppas; i++) {
ppa = ppa_list[i];
line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
spin_lock(&line->lock);
if (line->state != PBLK_LINESTATE_OPEN) {
pr_err("pblk: bad ppa: line:%d,state:%d\n",
line->id, line->state);
WARN_ON(1);
spin_unlock(&line->lock);
return -EINVAL;
}
spin_unlock(&line->lock);
}
}
ret = pblk_check_io(pblk, rqd);
if (ret)
return ret;
#endif
atomic_inc(&pblk->inflight_io);
@ -447,6 +424,23 @@ int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
return nvm_submit_io(dev, rqd);
}
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
{
struct nvm_tgt_dev *dev = pblk->dev;
#ifdef CONFIG_NVM_DEBUG
int ret;
ret = pblk_check_io(pblk, rqd);
if (ret)
return ret;
#endif
atomic_inc(&pblk->inflight_io);
return nvm_submit_io_sync(dev, rqd);
}
static void pblk_bio_map_addr_endio(struct bio *bio)
{
bio_put(bio);
@ -597,7 +591,6 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
int cmd_op, bio_op;
int i, j;
int ret;
DECLARE_COMPLETION_ONSTACK(wait);
if (dir == PBLK_WRITE) {
bio_op = REQ_OP_WRITE;
@ -639,8 +632,6 @@ next_rq:
rqd.dma_ppa_list = dma_ppa_list;
rqd.opcode = cmd_op;
rqd.nr_ppas = rq_ppas;
rqd.end_io = pblk_end_io_sync;
rqd.private = &wait;
if (dir == PBLK_WRITE) {
struct pblk_sec_meta *meta_list = rqd.meta_list;
@ -694,19 +685,14 @@ next_rq:
}
}
ret = pblk_submit_io(pblk, &rqd);
ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
pr_err("pblk: emeta I/O submission failed: %d\n", ret);
bio_put(bio);
goto free_rqd_dma;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: emeta I/O timed out\n");
}
atomic_dec(&pblk->inflight_io);
reinit_completion(&wait);
if (rqd.error) {
if (dir == PBLK_WRITE)
@ -750,7 +736,6 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
int i, ret;
int cmd_op, bio_op;
int flags;
DECLARE_COMPLETION_ONSTACK(wait);
if (dir == PBLK_WRITE) {
bio_op = REQ_OP_WRITE;
@ -787,8 +772,6 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
rqd.opcode = cmd_op;
rqd.flags = flags;
rqd.nr_ppas = lm->smeta_sec;
rqd.end_io = pblk_end_io_sync;
rqd.private = &wait;
for (i = 0; i < lm->smeta_sec; i++, paddr++) {
struct pblk_sec_meta *meta_list = rqd.meta_list;
@ -807,17 +790,13 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
* the write thread is the only one sending write and erase commands,
* there is no need to take the LUN semaphore.
*/
ret = pblk_submit_io(pblk, &rqd);
ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
pr_err("pblk: smeta I/O submission failed: %d\n", ret);
bio_put(bio);
goto free_ppa_list;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: smeta I/O timed out\n");
}
atomic_dec(&pblk->inflight_io);
if (rqd.error) {
@ -861,19 +840,15 @@ static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
{
struct nvm_rq rqd;
int ret = 0;
DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
pblk_setup_e_rq(pblk, &rqd, ppa);
rqd.end_io = pblk_end_io_sync;
rqd.private = &wait;
/* The write thread schedules erases so that it minimizes disturbances
* with writes. Thus, there is no need to take the LUN semaphore.
*/
ret = pblk_submit_io(pblk, &rqd);
ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
@ -886,11 +861,6 @@ static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
goto out;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: sync erase timed out\n");
}
out:
rqd.private = pblk;
__pblk_end_io_erase(pblk, &rqd);

21
drivers/lightnvm/pblk-read.c
View File

@ -207,7 +207,6 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
int nr_secs = rqd->nr_ppas;
int nr_holes = nr_secs - bitmap_weight(read_bitmap, nr_secs);
int i, ret, hole;
DECLARE_COMPLETION_ONSTACK(wait);
/* Re-use allocated memory for intermediate lbas */
lba_list_mem = (((void *)rqd->ppa_list) + pblk_dma_ppa_size);
@ -232,8 +231,6 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
rqd->bio = new_bio;
rqd->nr_ppas = nr_holes;
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
rqd->end_io = pblk_end_io_sync;
rqd->private = &wait;
if (unlikely(nr_holes == 1)) {
ppa_ptr = rqd->ppa_list;
@ -241,18 +238,13 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
rqd->ppa_addr = rqd->ppa_list[0];
}
ret = pblk_submit_read_io(pblk, rqd);
ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
bio_put(rqd->bio);
pr_err("pblk: read IO submission failed\n");
pr_err("pblk: sync read IO submission failed\n");
goto err;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: partial read I/O timed out\n");
}
if (rqd->error) {
atomic_long_inc(&pblk->read_failed);
#ifdef CONFIG_NVM_DEBUG
@ -537,7 +529,6 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
struct nvm_rq rqd;
int data_len;
int ret = NVM_IO_OK;
DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
@ -577,22 +568,16 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
bio_set_op_attrs(bio, REQ_OP_READ, 0);
rqd.opcode = NVM_OP_PREAD;
rqd.end_io = pblk_end_io_sync;
rqd.private = &wait;
rqd.nr_ppas = gc_rq->secs_to_gc;
rqd.flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
rqd.bio = bio;
if (pblk_submit_read_io(pblk, &rqd)) {
if (pblk_submit_io_sync(pblk, &rqd)) {
ret = -EIO;
pr_err("pblk: GC read request failed\n");
goto err_free_bio;
}
if (!wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
pr_err("pblk: GC read I/O timed out\n");
}
atomic_dec(&pblk->inflight_io);
if (rqd.error) {

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) {

42
drivers/lightnvm/pblk.h
View File

@ -714,6 +714,7 @@ void pblk_discard(struct pblk *pblk, struct bio *bio);
void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
unsigned int nr_secs, unsigned int len,
@ -1203,7 +1204,6 @@ static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
}
#endif
static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr *ppas, int nr_ppas)
@ -1224,14 +1224,50 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
ppa->g.sec < geo->sec_per_pg)
continue;
#ifdef CONFIG_NVM_DEBUG
print_ppa(ppa, "boundary", i);
#endif
return 1;
}
return 0;
}
static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct ppa_addr *ppa_list;
ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
WARN_ON(1);
return -EINVAL;
}
if (rqd->opcode == NVM_OP_PWRITE) {
struct pblk_line *line;
struct ppa_addr ppa;
int i;
for (i = 0; i < rqd->nr_ppas; i++) {
ppa = ppa_list[i];
line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
spin_lock(&line->lock);
if (line->state != PBLK_LINESTATE_OPEN) {
pr_err("pblk: bad ppa: line:%d,state:%d\n",
line->id, line->state);
WARN_ON(1);
spin_unlock(&line->lock);
return -EINVAL;
}
spin_unlock(&line->lock);
}
}
return 0;
}
#endif
static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
{
struct pblk_line_meta *lm = &pblk->lm;

70
drivers/nvme/host/lightnvm.c
View File

@ -492,33 +492,46 @@ static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
blk_mq_free_request(rq);
}
static struct request *nvme_nvm_alloc_request(struct request_queue *q,
struct nvm_rq *rqd,
struct nvme_nvm_command *cmd)
{
struct nvme_ns *ns = q->queuedata;
struct request *rq;
nvme_nvm_rqtocmd(rqd, ns, cmd);
rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
if (IS_ERR(rq))
return rq;
rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
if (rqd->bio) {
blk_init_request_from_bio(rq, rqd->bio);
} else {
rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
rq->__data_len = 0;
}
return rq;
}
static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct nvme_ns *ns = q->queuedata;
struct request *rq;
struct bio *bio = rqd->bio;
struct nvme_nvm_command *cmd;
struct request *rq;
cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
nvme_nvm_rqtocmd(rqd, ns, cmd);
rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY);
rq = nvme_nvm_alloc_request(q, rqd, cmd);
if (IS_ERR(rq)) {
kfree(cmd);
return PTR_ERR(rq);
}
rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
if (bio) {
blk_init_request_from_bio(rq, bio);
} else {
rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
rq->__data_len = 0;
}
rq->end_io_data = rqd;
@ -527,6 +540,34 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
return 0;
}
static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct request *rq;
struct nvme_nvm_command cmd;
int ret = 0;
memset(&cmd, 0, sizeof(struct nvme_nvm_command));
rq = nvme_nvm_alloc_request(q, rqd, &cmd);
if (IS_ERR(rq))
return PTR_ERR(rq);
/* I/Os can fail and the error is signaled through rqd. Callers must
* handle the error accordingly.
*/
blk_execute_rq(q, NULL, rq, 0);
if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
rqd->error = nvme_req(rq)->status;
blk_mq_free_request(rq);
return ret;
}
static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
{
struct nvme_ns *ns = nvmdev->q->queuedata;
@ -562,6 +603,7 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
.set_bb_tbl = nvme_nvm_set_bb_tbl,
.submit_io = nvme_nvm_submit_io,
.submit_io_sync = nvme_nvm_submit_io_sync,
.create_dma_pool = nvme_nvm_create_dma_pool,
.destroy_dma_pool = nvme_nvm_destroy_dma_pool,

3
include/linux/lightnvm.h
View File

@ -56,6 +56,7 @@ typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, u8 *);
typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvm_submit_io_sync_fn)(struct nvm_dev *, struct nvm_rq *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
typedef void (nvm_destroy_dma_pool_fn)(void *);
typedef void *(nvm_dev_dma_alloc_fn)(struct nvm_dev *, void *, gfp_t,
@ -69,6 +70,7 @@ struct nvm_dev_ops {
nvm_op_set_bb_fn *set_bb_tbl;
nvm_submit_io_fn *submit_io;
nvm_submit_io_sync_fn *submit_io_sync;
nvm_create_dma_pool_fn *create_dma_pool;
nvm_destroy_dma_pool_fn *destroy_dma_pool;
@ -477,6 +479,7 @@ extern int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr *,
int, int);
extern int nvm_max_phys_sects(struct nvm_tgt_dev *);
extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
extern int nvm_submit_io_sync(struct nvm_tgt_dev *, struct nvm_rq *);
extern int nvm_erase_sync(struct nvm_tgt_dev *, struct ppa_addr *, int);
extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
void *);