[PATCH 13/15] lightnvm: pblk: implement get log report chunk
Matias Bjørling
mb at lightnvm.io
Thu Mar 1 02:45:06 PST 2018
On 02/28/2018 04:49 PM, Javier González wrote:
> In preparation of pblk supporting 2.0, implement the get log report
> chunk in pblk. Also, define the chunk states as given in the 2.0 spec.
>
> Signed-off-by: Javier González <javier at cnexlabs.com>
> ---
> drivers/lightnvm/pblk-core.c | 139 +++++++++++++++++++++++----
> drivers/lightnvm/pblk-init.c | 223 +++++++++++++++++++++++++++++++------------
> drivers/lightnvm/pblk.h | 7 ++
> include/linux/lightnvm.h | 13 +++
> 4 files changed, 301 insertions(+), 81 deletions(-)
>
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 2e10b18b61e3..cd663855ee88 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -44,11 +44,12 @@ static void pblk_line_mark_bb(struct work_struct *work)
> }
>
> static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
> - struct ppa_addr *ppa)
> + struct ppa_addr ppa_addr)
> {
> struct nvm_tgt_dev *dev = pblk->dev;
> struct nvm_geo *geo = &dev->geo;
> - int pos = pblk_ppa_to_pos(geo, *ppa);
> + struct ppa_addr *ppa;
> + int pos = pblk_ppa_to_pos(geo, ppa_addr);
>
> pr_debug("pblk: erase failed: line:%d, pos:%d\n", line->id, pos);
> atomic_long_inc(&pblk->erase_failed);
> @@ -58,26 +59,38 @@ static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
> pr_err("pblk: attempted to erase bb: line:%d, pos:%d\n",
> line->id, pos);
>
> + /* Not necessary to mark bad blocks on 2.0 spec. */
> + if (geo->version == NVM_OCSSD_SPEC_20)
> + return;
> +
> + ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC);
> + if (!ppa)
> + return;
> +
> + *ppa = ppa_addr;
> pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb,
> GFP_ATOMIC, pblk->bb_wq);
> }
>
> static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
> {
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct nvm_chk_meta *chunk;
> struct pblk_line *line;
> + int pos;
>
> line = &pblk->lines[pblk_ppa_to_line(rqd->ppa_addr)];
> + pos = pblk_ppa_to_pos(geo, rqd->ppa_addr);
> + chunk = &line->chks[pos];
> +
> atomic_dec(&line->left_seblks);
>
> if (rqd->error) {
> - struct ppa_addr *ppa;
> -
> - ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC);
> - if (!ppa)
> - return;
> -
> - *ppa = rqd->ppa_addr;
> - pblk_mark_bb(pblk, line, ppa);
> + chunk->state = NVM_CHK_ST_OFFLINE;
> + pblk_mark_bb(pblk, line, rqd->ppa_addr);
> + } else {
> + chunk->state = NVM_CHK_ST_FREE;
> }
>
> atomic_dec(&pblk->inflight_io);
> @@ -92,6 +105,50 @@ static void pblk_end_io_erase(struct nvm_rq *rqd)
> mempool_free(rqd, pblk->e_rq_pool);
> }
>
> +/*
> + * Get information for all chunks from the device.
> + *
> + * The caller is responsible for freeing the returned structure
> + */
> +struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk)
> +{
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct nvm_chk_meta *meta;
> + struct ppa_addr ppa;
> + unsigned long len;
> + int ret;
> +
> + ppa.ppa = 0;
> +
> + len = geo->all_chunks * sizeof(*meta);
> + meta = kzalloc(len, GFP_KERNEL);
> + if (!meta)
> + return ERR_PTR(-ENOMEM);
> +
> + ret = nvm_get_chunk_meta(dev, meta, ppa, geo->all_chunks);
> + if (ret) {
> + pr_err("pblk: could not get chunk metadata (%d)\n", ret);
The error message can be omitted here. If there is an error,
nvme_nvm_get_chk_meta will already had barfed.
> + kfree(meta);
> + return ERR_PTR(-EIO);
> + }
> +
> + return meta;
> +}
> +
> +struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
> + struct nvm_chk_meta *meta,
> + struct ppa_addr ppa)
> +{
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + int ch_off = ppa.m.grp * geo->num_chk * geo->num_lun;
> + int lun_off = ppa.m.pu * geo->num_chk;
> + int chk_off = ppa.m.chk;
> +
> + return meta + ch_off + lun_off + chk_off;
> +}
> +
> void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
> u64 paddr)
> {
> @@ -1094,10 +1151,34 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
> return 1;
> }
>
> +static int pblk_prepare_new_line(struct pblk *pblk, struct pblk_line *line)
> +{
> + struct pblk_line_meta *lm = &pblk->lm;
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + int blk_to_erase = atomic_read(&line->blk_in_line);
> + int i;
> +
> + for (i = 0; i < lm->blk_per_line; i++) {
> + struct pblk_lun *rlun = &pblk->luns[i];
> + int pos = pblk_ppa_to_pos(geo, rlun->bppa);
> + int state = line->chks[pos].state;
> +
> + /* Free chunks should not be erased */
> + if (state & NVM_CHK_ST_FREE) {
> + set_bit(pblk_ppa_to_pos(geo, rlun->bppa),
> + line->erase_bitmap);
> + blk_to_erase--;
> + }
> + }
> +
> + return blk_to_erase;
> +}
> +
> static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
> {
> struct pblk_line_meta *lm = &pblk->lm;
> - int blk_in_line = atomic_read(&line->blk_in_line);
> + int blk_to_erase;
>
> line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_ATOMIC);
> if (!line->map_bitmap)
> @@ -1110,7 +1191,21 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
> return -ENOMEM;
> }
>
> + /* Bad blocks do not need to be erased */
> + bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line);
> +
> spin_lock(&line->lock);
> +
> + /* If we have not written to this line, we need to mark up free chunks
> + * as already erased
> + */
> + if (line->state == PBLK_LINESTATE_NEW) {
> + blk_to_erase = pblk_prepare_new_line(pblk, line);
> + line->state = PBLK_LINESTATE_FREE;
> + } else {
> + blk_to_erase = atomic_read(&line->blk_in_line);
> + }
> +
> if (line->state != PBLK_LINESTATE_FREE) {
> kfree(line->map_bitmap);
> kfree(line->invalid_bitmap);
> @@ -1122,15 +1217,12 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
>
> line->state = PBLK_LINESTATE_OPEN;
>
> - atomic_set(&line->left_eblks, blk_in_line);
> - atomic_set(&line->left_seblks, blk_in_line);
> + atomic_set(&line->left_eblks, blk_to_erase);
> + atomic_set(&line->left_seblks, blk_to_erase);
>
> line->meta_distance = lm->meta_distance;
> spin_unlock(&line->lock);
>
> - /* Bad blocks do not need to be erased */
> - bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line);
> -
> kref_init(&line->ref);
>
> return 0;
> @@ -1586,12 +1678,14 @@ static void pblk_line_should_sync_meta(struct pblk *pblk)
>
> void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
> {
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct pblk_line_meta *lm = &pblk->lm;
> struct pblk_line_mgmt *l_mg = &pblk->l_mg;
> struct list_head *move_list;
> + int i;
>
> #ifdef CONFIG_NVM_DEBUG
> - struct pblk_line_meta *lm = &pblk->lm;
> -
> WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line),
> "pblk: corrupt closed line %d\n", line->id);
> #endif
> @@ -1613,6 +1707,15 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
> line->smeta = NULL;
> line->emeta = NULL;
>
> + for (i = 0; i < lm->blk_per_line; i++) {
> + struct pblk_lun *rlun = &pblk->luns[i];
> + int pos = pblk_ppa_to_pos(geo, rlun->bppa);
> + int state = line->chks[pos].state;
> +
> + if (!(state & NVM_CHK_ST_OFFLINE))
> + state = NVM_CHK_ST_CLOSED;
> + }
> +
> spin_unlock(&line->lock);
> spin_unlock(&l_mg->gc_lock);
> }
> diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
> index 73b221c69cfd..bd2592fc3378 100644
> --- a/drivers/lightnvm/pblk-init.c
> +++ b/drivers/lightnvm/pblk-init.c
> @@ -401,6 +401,7 @@ static void pblk_line_meta_free(struct pblk_line *line)
> {
> kfree(line->blk_bitmap);
> kfree(line->erase_bitmap);
> + kfree(line->chks);
> }
>
> static void pblk_lines_free(struct pblk *pblk)
> @@ -440,55 +441,44 @@ static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun,
> return 0;
> }
>
> -static void *pblk_bb_get_log(struct pblk *pblk)
> +static void *pblk_bb_get_meta(struct pblk *pblk)
> {
> struct nvm_tgt_dev *dev = pblk->dev;
> struct nvm_geo *geo = &dev->geo;
> - u8 *log;
> + u8 *meta;
> int i, nr_blks, blk_per_lun;
> int ret;
>
> blk_per_lun = geo->num_chk * geo->pln_mode;
> nr_blks = blk_per_lun * geo->all_luns;
>
> - log = kmalloc(nr_blks, GFP_KERNEL);
> - if (!log)
> + meta = kmalloc(nr_blks, GFP_KERNEL);
> + if (!meta)
> return ERR_PTR(-ENOMEM);
>
> for (i = 0; i < geo->all_luns; i++) {
> struct pblk_lun *rlun = &pblk->luns[i];
> - u8 *log_pos = log + i * blk_per_lun;
> + u8 *meta_pos = meta + i * blk_per_lun;
>
> - ret = pblk_bb_get_tbl(dev, rlun, log_pos, blk_per_lun);
> + ret = pblk_bb_get_tbl(dev, rlun, meta_pos, blk_per_lun);
> if (ret) {
> - kfree(log);
> + kfree(meta);
> return ERR_PTR(-EIO);
> }
> }
>
> - return log;
> + return meta;
> }
>
> -static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line,
> - u8 *bb_log, int blk_per_line)
> +static void *pblk_chunk_get_meta(struct pblk *pblk)
> {
> struct nvm_tgt_dev *dev = pblk->dev;
> struct nvm_geo *geo = &dev->geo;
> - int i, bb_cnt = 0;
> - int blk_per_lun = geo->num_chk * geo->pln_mode;
>
> - for (i = 0; i < blk_per_line; i++) {
> - struct pblk_lun *rlun = &pblk->luns[i];
> - u8 *lun_bb_log = bb_log + i * blk_per_lun;
> -
> - if (lun_bb_log[line->id] == NVM_BLK_T_FREE)
> - continue;
> -
> - set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap);
> - bb_cnt++;
> - }
> -
> - return bb_cnt;
> + if (geo->version == NVM_OCSSD_SPEC_12)
> + return pblk_bb_get_meta(pblk);
> + else
> + return pblk_chunk_get_info(pblk);
> }
>
> static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
> @@ -696,8 +686,131 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk)
> return -ENOMEM;
> }
>
> -static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
> - void *chunk_log, long *nr_bad_blks)
> +static int pblk_setup_line_meta_12(struct pblk *pblk, struct pblk_line *line,
> + void *chunk_meta)
> +{
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct pblk_line_meta *lm = &pblk->lm;
> + int i, chk_per_lun, nr_bad_chks = 0;
> +
> + chk_per_lun = geo->num_chk * geo->pln_mode;
> +
> + for (i = 0; i < lm->blk_per_line; i++) {
> + struct pblk_lun *rlun = &pblk->luns[i];
> + struct nvm_chk_meta *chunk;
> + int pos = pblk_ppa_to_pos(geo, rlun->bppa);
> + u8 *lun_bb_meta = chunk_meta + pos * chk_per_lun;
> +
> + chunk = &line->chks[pos];
> +
> + /*
> + * In 1.2 spec. chunk state is not persisted by the device. Thus
> + * some of the values are reset each time pblk is instantiated.
> + */
> + if (lun_bb_meta[line->id] == NVM_BLK_T_FREE)
> + chunk->state = NVM_CHK_ST_FREE;
> + else
> + chunk->state = NVM_CHK_ST_OFFLINE;
> +
> + chunk->type = NVM_CHK_TP_W_SEQ;
> + chunk->wi = 0;
> + chunk->slba = -1;
> + chunk->cnlb = geo->clba;
> + chunk->wp = 0;
> +
> + if (!(chunk->state & NVM_CHK_ST_OFFLINE))
> + continue;
> +
> + set_bit(pos, line->blk_bitmap);
> + nr_bad_chks++;
> + }
> +
> + return nr_bad_chks;
> +}
> +
> +static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line,
> + struct nvm_chk_meta *meta)
> +{
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct pblk_line_meta *lm = &pblk->lm;
> + int i, nr_bad_chks = 0;
> +
> + for (i = 0; i < lm->blk_per_line; i++) {
> + struct pblk_lun *rlun = &pblk->luns[i];
> + struct nvm_chk_meta *chunk;
> + struct nvm_chk_meta *chunk_meta;
> + struct ppa_addr ppa;
> + int pos;
> +
> + ppa = rlun->bppa;
> + pos = pblk_ppa_to_pos(geo, ppa);
> + chunk = &line->chks[pos];
> +
> + ppa.m.chk = line->id;
> + chunk_meta = pblk_chunk_get_off(pblk, meta, ppa);
> +
> + chunk->state = chunk_meta->state;
> + chunk->type = chunk_meta->type;
> + chunk->wi = chunk_meta->wi;
> + chunk->slba = chunk_meta->slba;
> + chunk->cnlb = chunk_meta->cnlb;
> + chunk->wp = chunk_meta->wp;
> +
> + if (!(chunk->state & NVM_CHK_ST_OFFLINE))
> + continue;
> +
> + if (chunk->type & NVM_CHK_TP_SZ_SPEC) {
> + WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n");
> + continue;
> + }
> +
> + set_bit(pos, line->blk_bitmap);
> + nr_bad_chks++;
> + }
> +
> + return nr_bad_chks;
> +}
> +
> +static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
> + void *chunk_meta, int line_id)
> +{
> + struct nvm_tgt_dev *dev = pblk->dev;
> + struct nvm_geo *geo = &dev->geo;
> + struct pblk_line_mgmt *l_mg = &pblk->l_mg;
> + struct pblk_line_meta *lm = &pblk->lm;
> + long nr_bad_chks, chk_in_line;
> +
> + line->pblk = pblk;
> + line->id = line_id;
> + line->type = PBLK_LINETYPE_FREE;
> + line->state = PBLK_LINESTATE_NEW;
> + line->gc_group = PBLK_LINEGC_NONE;
> + line->vsc = &l_mg->vsc_list[line_id];
> + spin_lock_init(&line->lock);
> +
> + if (geo->version == NVM_OCSSD_SPEC_12)
> + nr_bad_chks = pblk_setup_line_meta_12(pblk, line, chunk_meta);
> + else
> + nr_bad_chks = pblk_setup_line_meta_20(pblk, line, chunk_meta);
> +
> + chk_in_line = lm->blk_per_line - nr_bad_chks;
> + if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line ||
> + chk_in_line < lm->min_blk_line) {
> + line->state = PBLK_LINESTATE_BAD;
> + list_add_tail(&line->list, &l_mg->bad_list);
> + return 0;
> + }
> +
> + atomic_set(&line->blk_in_line, chk_in_line);
> + list_add_tail(&line->list, &l_mg->free_list);
> + l_mg->nr_free_lines++;
> +
> + return chk_in_line;
> +}
> +
> +static int pblk_alloc_line_meta(struct pblk *pblk, struct pblk_line *line)
> {
> struct pblk_line_meta *lm = &pblk->lm;
>
> @@ -711,7 +824,13 @@ static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
> return -ENOMEM;
> }
>
> - *nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line);
> + line->chks = kmalloc(lm->blk_per_line * sizeof(struct nvm_chk_meta),
> + GFP_KERNEL);
> + if (!line->chks) {
> + kfree(line->erase_bitmap);
> + kfree(line->blk_bitmap);
> + return -ENOMEM;
> + }
>
> return 0;
> }
> @@ -723,9 +842,9 @@ static int pblk_lines_init(struct pblk *pblk)
> struct pblk_line_mgmt *l_mg = &pblk->l_mg;
> struct pblk_line_meta *lm = &pblk->lm;
> struct pblk_line *line;
> - void *chunk_log;
> + void *chunk_meta;
> unsigned int smeta_len, emeta_len;
> - long nr_bad_blks = 0, nr_free_blks = 0;
> + long nr_free_chks = 0;
> int bb_distance, max_write_ppas;
> int i, ret;
>
> @@ -842,53 +961,31 @@ static int pblk_lines_init(struct pblk *pblk)
> goto fail_free_bb_aux;
> }
>
> - chunk_log = pblk_bb_get_log(pblk);
> - if (IS_ERR(chunk_log)) {
> - pr_err("pblk: could not get bad block log (%lu)\n",
> - PTR_ERR(chunk_log));
> - ret = PTR_ERR(chunk_log);
> + chunk_meta = pblk_chunk_get_meta(pblk);
> + if (IS_ERR(chunk_meta)) {
> + pr_err("pblk: could not get chunk log (%lu)\n",
> + PTR_ERR(chunk_meta));
> + ret = PTR_ERR(chunk_meta);
> goto fail_free_lines;
> }
>
> for (i = 0; i < l_mg->nr_lines; i++) {
> - int chk_in_line;
> -
> line = &pblk->lines[i];
>
> - line->pblk = pblk;
> - line->id = i;
> - line->type = PBLK_LINETYPE_FREE;
> - line->state = PBLK_LINESTATE_FREE;
> - line->gc_group = PBLK_LINEGC_NONE;
> - line->vsc = &l_mg->vsc_list[i];
> - spin_lock_init(&line->lock);
> -
> - ret = pblk_setup_line_meta(pblk, line, chunk_log, &nr_bad_blks);
> + ret = pblk_alloc_line_meta(pblk, line);
> if (ret)
> - goto fail_free_chunk_log;
> + goto fail_free_chunk_meta;
>
> - chk_in_line = lm->blk_per_line - nr_bad_blks;
> - if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line ||
> - chk_in_line < lm->min_blk_line) {
> - line->state = PBLK_LINESTATE_BAD;
> - list_add_tail(&line->list, &l_mg->bad_list);
> - continue;
> - }
> -
> - nr_free_blks += chk_in_line;
> - atomic_set(&line->blk_in_line, chk_in_line);
> -
> - l_mg->nr_free_lines++;
> - list_add_tail(&line->list, &l_mg->free_list);
> + nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
> }
>
> - pblk_set_provision(pblk, nr_free_blks);
> + pblk_set_provision(pblk, nr_free_chks);
>
> - kfree(chunk_log);
> + kfree(chunk_meta);
> return 0;
>
> -fail_free_chunk_log:
> - kfree(chunk_log);
> +fail_free_chunk_meta:
> + kfree(chunk_meta);
> while (--i >= 0)
> pblk_line_meta_free(&pblk->lines[i]);
> fail_free_lines:
> diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
> index 6ac64d9eb57e..ee149766b7a0 100644
> --- a/drivers/lightnvm/pblk.h
> +++ b/drivers/lightnvm/pblk.h
> @@ -297,6 +297,7 @@ enum {
> PBLK_LINETYPE_DATA = 2,
>
> /* Line state */
> + PBLK_LINESTATE_NEW = 9,
> PBLK_LINESTATE_FREE = 10,
> PBLK_LINESTATE_OPEN = 11,
> PBLK_LINESTATE_CLOSED = 12,
> @@ -426,6 +427,8 @@ struct pblk_line {
>
> unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */
>
> + struct nvm_chk_meta *chks; /* Chunks forming line */
> +
> struct pblk_smeta *smeta; /* Start metadata */
> struct pblk_emeta *emeta; /* End medatada */
>
> @@ -729,6 +732,10 @@ void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
> int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
> struct pblk_c_ctx *c_ctx);
> void pblk_discard(struct pblk *pblk, struct bio *bio);
> +struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk);
> +struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
> + struct nvm_chk_meta *lp,
> + struct ppa_addr ppa);
> 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);
> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
> index 9fe37f7e8185..c120b2243758 100644
> --- a/include/linux/lightnvm.h
> +++ b/include/linux/lightnvm.h
> @@ -232,6 +232,19 @@ struct nvm_addr_format {
> u64 rsv_mask[2];
> };
>
> +enum {
> + /* Chunk states */
> + NVM_CHK_ST_FREE = 1 << 0,
> + NVM_CHK_ST_CLOSED = 1 << 1,
> + NVM_CHK_ST_OPEN = 1 << 2,
> + NVM_CHK_ST_OFFLINE = 1 << 3,
> +
> + /* Chunk types */
> + NVM_CHK_TP_W_SEQ = 1 << 0,
> + NVM_CHK_TP_W_RAN = 1 << 1,
> + NVM_CHK_TP_SZ_SPEC = 1 << 4,
> +};
> +
> /*
> * Note: The structure size is linked to nvme_nvm_chk_meta such that the same
> * buffer can be used when converting from little endian to cpu addressing.
>
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