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lightnvm: submit erases using the I/O path 

Until now erases have been submitted as synchronous commands through a
dedicated erase function. In order to enable targets implementing
asynchronous erases, refactor the erase path so that it uses the normal
async I/O submission functions. If a target requires sync I/O, it can
implement it internally. Also, adapt rrpc to use the new erase path.

Signed-off-by: Javier González <javier@cnexlabs.com>
Fixed spelling error.
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>

Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Javier González 2017-04-15 20:55:37 +02:00 committed by Jens Axboe
parent 2849a7becb
commit 17912c49ed
4 changed files with 47 additions and 50 deletions
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54
drivers/lightnvm/core.c
View File

@ -590,11 +590,11 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
memset(&rqd, 0, sizeof(struct nvm_rq));
nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1);
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
nvm_free_rqd_ppalist(dev, &rqd);
nvm_free_rqd_ppalist(tgt_dev, &rqd);
if (ret) {
pr_err("nvm: failed bb mark\n");
return -EINVAL;
@ -626,34 +626,45 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags)
static void nvm_end_io_sync(struct nvm_rq *rqd)
{
struct nvm_dev *dev = tgt_dev->parent;
struct completion *waiting = rqd->private;
complete(waiting);
}
int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas)
{
struct nvm_geo *geo = &tgt_dev->geo;
struct nvm_rq rqd;
int ret;
if (!dev->ops->erase_block)
return 0;
nvm_map_to_dev(tgt_dev, ppas);
DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1);
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, 1);
if (ret)
return ret;
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
ret = nvm_submit_io(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);
rqd.flags = flags;
ret = dev->ops->erase_block(dev, &rqd);
nvm_free_rqd_ppalist(dev, &rqd);
free_ppa_list:
nvm_free_rqd_ppalist(tgt_dev, &rqd);
return ret;
}
EXPORT_SYMBOL(nvm_erase_blk);
EXPORT_SYMBOL(nvm_erase_sync);
int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb,
nvm_l2p_update_fn *update_l2p, void *priv)
@ -732,10 +743,11 @@ void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
}
EXPORT_SYMBOL(nvm_put_area);
int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
const struct ppa_addr *ppas, int nr_ppas, int vblk)
{
struct nvm_geo *geo = &dev->geo;
struct nvm_dev *dev = tgt_dev->parent;
struct nvm_geo *geo = &tgt_dev->geo;
int i, plane_cnt, pl_idx;
struct ppa_addr ppa;
@ -773,12 +785,12 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
}
EXPORT_SYMBOL(nvm_set_rqd_ppalist);
void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
if (!rqd->ppa_list)
return;
nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
}
EXPORT_SYMBOL(nvm_free_rqd_ppalist);

3
drivers/lightnvm/rrpc.c
View File

@ -414,7 +414,6 @@ static void rrpc_block_gc(struct work_struct *work)
struct rrpc *rrpc = gcb->rrpc;
struct rrpc_block *rblk = gcb->rblk;
struct rrpc_lun *rlun = rblk->rlun;
struct nvm_tgt_dev *dev = rrpc->dev;
struct ppa_addr ppa;
mempool_free(gcb, rrpc->gcb_pool);
@ -430,7 +429,7 @@ static void rrpc_block_gc(struct work_struct *work)
ppa.g.lun = rlun->bppa.g.lun;
ppa.g.blk = rblk->id;
if (nvm_erase_blk(dev, &ppa, 0))
if (nvm_erase_sync(rrpc->dev, &ppa, 1))
goto put_back;
rrpc_put_blk(rrpc, rblk);

32
drivers/nvme/host/lightnvm.c
View File

@ -510,12 +510,16 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
}
rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
rq->ioprio = bio_prio(bio);
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
if (bio) {
rq->ioprio = bio_prio(bio);
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
} else {
rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
rq->__data_len = 0;
}
nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
@ -526,21 +530,6 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
return 0;
}
static int nvme_nvm_erase_block(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct nvme_ns *ns = q->queuedata;
struct nvme_nvm_command c = {};
c.erase.opcode = NVM_OP_ERASE;
c.erase.nsid = cpu_to_le32(ns->ns_id);
c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa);
c.erase.length = cpu_to_le16(rqd->nr_ppas - 1);
c.erase.control = cpu_to_le16(rqd->flags);
return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
}
static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name)
{
struct nvme_ns *ns = nvmdev->q->queuedata;
@ -576,7 +565,6 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
.set_bb_tbl = nvme_nvm_set_bb_tbl,
.submit_io = nvme_nvm_submit_io,
.erase_block = nvme_nvm_erase_block,
.create_dma_pool = nvme_nvm_create_dma_pool,
.destroy_dma_pool = nvme_nvm_destroy_dma_pool,

8
include/linux/lightnvm.h
View File

@ -56,7 +56,6 @@ 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_erase_blk_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,
@ -70,7 +69,6 @@ struct nvm_dev_ops {
nvm_op_set_bb_fn *set_bb_tbl;
nvm_submit_io_fn *submit_io;
nvm_erase_blk_fn *erase_block;
nvm_create_dma_pool_fn *create_dma_pool;
nvm_destroy_dma_pool_fn *destroy_dma_pool;
@ -479,10 +477,10 @@ 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_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
extern int nvm_erase_sync(struct nvm_tgt_dev *, struct ppa_addr *, int);
extern int nvm_set_rqd_ppalist(struct nvm_tgt_dev *, struct nvm_rq *,
const struct ppa_addr *, int, int);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
extern int nvm_erase_blk(struct nvm_tgt_dev *, struct ppa_addr *, int);
extern void nvm_free_rqd_ppalist(struct nvm_tgt_dev *, struct nvm_rq *);
extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
void *);
extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t);