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SubjectRe: [PATCH] lightnvm: combine 1.2 and 2.0 command flags
Date
> On 2 Aug 2018, at 18.20, Matias Bjørling <mb@lightnvm.io> wrote:
>
> Avoid targets open-code the nvm_rq command flag for version 1.2 and
> 2.0. The core should have this responsibility.
>
> When moved into core, the flags parameter can be distilled into
> access hint, scrambling, and program/erase suspend. Replace the
> access hint with a "is_seq" parameter, and let the rest be
> dependent on the command opcode, which is trivial to detect and
> set.
>
> Signed-off-by: Matias Bjørling <mb@lightnvm.io>
> ---
> drivers/lightnvm/core.c | 20 ++++++++++++++++++++
> drivers/lightnvm/pblk-core.c | 13 ++++---------
> drivers/lightnvm/pblk-read.c | 8 +-------
> drivers/lightnvm/pblk-recovery.c | 14 ++++----------
> drivers/lightnvm/pblk-write.c | 2 +-
> drivers/lightnvm/pblk.h | 38 --------------------------------------
> include/linux/lightnvm.h | 2 ++
> 7 files changed, 32 insertions(+), 65 deletions(-)
>
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index 60aa7bc5a630..68553c7ae937 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -752,6 +752,24 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
> }
> EXPORT_SYMBOL(nvm_set_tgt_bb_tbl);
>
> +static int nvm_set_flags(struct nvm_geo *geo, struct nvm_rq *rqd)
> +{
> + int flags = 0;
> +
> + if (geo->version == NVM_OCSSD_SPEC_20)
> + return 0;
> +
> + if (rqd->is_seq)
> + flags |= geo->pln_mode >> 1;
> +
> + if (rqd->opcode == NVM_OP_PREAD)
> + flags |= (NVM_IO_SCRAMBLE_ENABLE | NVM_IO_SUSPEND);
> + else if (rqd->opcode == NVM_OP_PWRITE)
> + flags |= NVM_IO_SCRAMBLE_ENABLE;
> +
> + return flags;
> +}
> +
> int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
> {
> struct nvm_dev *dev = tgt_dev->parent;
> @@ -763,6 +781,7 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
> nvm_rq_tgt_to_dev(tgt_dev, rqd);
>
> rqd->dev = tgt_dev;
> + rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
>
> /* In case of error, fail with right address format */
> ret = dev->ops->submit_io(dev, rqd);
> @@ -783,6 +802,7 @@ int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
> nvm_rq_tgt_to_dev(tgt_dev, rqd);
>
> rqd->dev = tgt_dev;
> + rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
>
> /* In case of error, fail with right address format */
> ret = dev->ops->submit_io_sync(dev, rqd);
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 00984b486fea..72acf2f6dbd6 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -688,7 +688,7 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
> if (dir == PBLK_WRITE) {
> struct pblk_sec_meta *meta_list = rqd.meta_list;
>
> - rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
> + rqd.is_seq = 1;
> for (i = 0; i < rqd.nr_ppas; ) {
> spin_lock(&line->lock);
> paddr = __pblk_alloc_page(pblk, line, min);
> @@ -703,11 +703,9 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
> for (i = 0; i < rqd.nr_ppas; ) {
> struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id);
> int pos = pblk_ppa_to_pos(geo, ppa);
> - int read_type = PBLK_READ_RANDOM;
>
> if (pblk_io_aligned(pblk, rq_ppas))
> - read_type = PBLK_READ_SEQUENTIAL;
> - rqd.flags = pblk_set_read_mode(pblk, read_type);
> + rqd.is_seq = 1;
>
> while (test_bit(pos, line->blk_bitmap)) {
> paddr += min;
> @@ -787,17 +785,14 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
> __le64 *lba_list = NULL;
> int i, ret;
> int cmd_op, bio_op;
> - int flags;
>
> if (dir == PBLK_WRITE) {
> bio_op = REQ_OP_WRITE;
> cmd_op = NVM_OP_PWRITE;
> - flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
> lba_list = emeta_to_lbas(pblk, line->emeta->buf);
> } else if (dir == PBLK_READ_RECOV || dir == PBLK_READ) {
> bio_op = REQ_OP_READ;
> cmd_op = NVM_OP_PREAD;
> - flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
> } else
> return -EINVAL;
>
> @@ -822,7 +817,7 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
>
> rqd.bio = bio;
> rqd.opcode = cmd_op;
> - rqd.flags = flags;
> + rqd.is_seq = 1;
> rqd.nr_ppas = lm->smeta_sec;
>
> for (i = 0; i < lm->smeta_sec; i++, paddr++) {
> @@ -885,7 +880,7 @@ static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
> rqd->opcode = NVM_OP_ERASE;
> rqd->ppa_addr = ppa;
> rqd->nr_ppas = 1;
> - rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE);
> + rqd->is_seq = 1;
> rqd->bio = NULL;
> }
>
> diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
> index 26d414ae25b6..48739f6c0417 100644
> --- a/drivers/lightnvm/pblk-read.c
> +++ b/drivers/lightnvm/pblk-read.c
> @@ -93,9 +93,7 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
> }
>
> if (pblk_io_aligned(pblk, nr_secs))
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
> - else
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> + rqd->is_seq = 1;
>
> #ifdef CONFIG_NVM_PBLK_DEBUG
> atomic_long_add(nr_secs, &pblk->inflight_reads);
> @@ -344,7 +342,6 @@ static int pblk_setup_partial_read(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);
>
> pr_ctx->ppa_ptr = NULL;
> pr_ctx->orig_bio = bio;
> @@ -438,8 +435,6 @@ static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd, struct bio *bio,
> } else {
> rqd->ppa_addr = ppa;
> }
> -
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> }
>
> int pblk_submit_read(struct pblk *pblk, struct bio *bio)
> @@ -662,7 +657,6 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
>
> rqd.opcode = NVM_OP_PREAD;
> rqd.nr_ppas = gc_rq->secs_to_gc;
> - rqd.flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> rqd.bio = bio;
>
> if (pblk_submit_io_sync(pblk, &rqd)) {
> diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
> index e232e47e1353..cf629ab016ba 100644
> --- a/drivers/lightnvm/pblk-recovery.c
> +++ b/drivers/lightnvm/pblk-recovery.c
> @@ -159,9 +159,7 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
> rqd->dma_meta_list = dma_meta_list;
>
> if (pblk_io_aligned(pblk, rq_ppas))
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
> - else
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> + rqd->is_seq = 1;
>
> for (i = 0; i < rqd->nr_ppas; ) {
> struct ppa_addr ppa;
> @@ -302,7 +300,7 @@ static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line,
>
> rqd->bio = bio;
> rqd->opcode = NVM_OP_PWRITE;
> - rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
> + rqd->is_seq = 1;
> rqd->meta_list = meta_list;
> rqd->nr_ppas = rq_ppas;
> rqd->ppa_list = ppa_list;
> @@ -436,9 +434,7 @@ static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line,
> rqd->dma_meta_list = dma_meta_list;
>
> if (pblk_io_aligned(pblk, rq_ppas))
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
> - else
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> + rqd->is_seq = 1;
>
> for (i = 0; i < rqd->nr_ppas; ) {
> struct ppa_addr ppa;
> @@ -567,9 +563,7 @@ static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line,
> rqd->dma_meta_list = dma_meta_list;
>
> if (pblk_io_aligned(pblk, rq_ppas))
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
> - else
> - rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
> + rqd->is_seq = 1;
>
> for (i = 0; i < rqd->nr_ppas; ) {
> struct ppa_addr ppa;
> diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
> index ee774a86cf1e..508c63701eda 100644
> --- a/drivers/lightnvm/pblk-write.c
> +++ b/drivers/lightnvm/pblk-write.c
> @@ -302,7 +302,7 @@ static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
> /* Setup write request */
> rqd->opcode = NVM_OP_PWRITE;
> rqd->nr_ppas = nr_secs;
> - rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
> + rqd->is_seq = 1;
> rqd->private = pblk;
> rqd->end_io = end_io;
>
> diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
> index 4760af7b6499..48b3035df3c4 100644
> --- a/drivers/lightnvm/pblk.h
> +++ b/drivers/lightnvm/pblk.h
> @@ -1255,44 +1255,6 @@ static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
> return crc;
> }
>
> -static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
> -{
> - struct nvm_tgt_dev *dev = pblk->dev;
> - struct nvm_geo *geo = &dev->geo;
> - int flags;
> -
> - if (geo->version == NVM_OCSSD_SPEC_20)
> - return 0;
> -
> - flags = geo->pln_mode >> 1;
> -
> - if (type == PBLK_WRITE)
> - flags |= NVM_IO_SCRAMBLE_ENABLE;
> -
> - return flags;
> -}
> -
> -enum {
> - PBLK_READ_RANDOM = 0,
> - PBLK_READ_SEQUENTIAL = 1,
> -};
> -
> -static inline int pblk_set_read_mode(struct pblk *pblk, int type)
> -{
> - struct nvm_tgt_dev *dev = pblk->dev;
> - struct nvm_geo *geo = &dev->geo;
> - int flags;
> -
> - if (geo->version == NVM_OCSSD_SPEC_20)
> - return 0;
> -
> - flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
> - if (type == PBLK_READ_SEQUENTIAL)
> - flags |= geo->pln_mode >> 1;
> -
> - return flags;
> -}
> -
> static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
> {
> return !(nr_secs % pblk->min_write_pgs);
> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
> index e9e0d1c7eaf5..8acc2fe277d6 100644
> --- a/include/linux/lightnvm.h
> +++ b/include/linux/lightnvm.h
> @@ -305,6 +305,8 @@ struct nvm_rq {
> u64 ppa_status; /* ppa media status */
> int error;
>
> + int is_seq; /* Sequential hint flag. 1.2 only */
> +
> void *private;
> };
>
> --
> 2.11.0

Looks good to me. If you pick up [1], please note that you will need to
transform it too.

[1] lightnvm: pblk: recover chunk state on 1.2 devices

Reviewed-by: Javier González <javier@cnexlabs.com>

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