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Subject: Re: [PATCH 1/8] lightnvm: exposed generic geometry to targets
To:     =?UTF-8?Q?Javier_Gonz=c3=a1lez?= <jg@lightnvm.io>
Cc:     linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-nvme@lists.infradead.org,
        =?UTF-8?Q?Javier_Gonz=c3=a1lez?= <javier@cnexlabs.com>
References: <1518530768-20956-1-git-send-email-javier@cnexlabs.com>
 <1518530768-20956-2-git-send-email-javier@cnexlabs.com>
From:   =?UTF-8?Q?Matias_Bj=c3=b8rling?= <mb@lightnvm.io>
Message-ID: <58e5f836-ccaf-59b8-855b-7fd99290b436@lightnvm.io>
Date:   Thu, 15 Feb 2018 11:13:43 +0100
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On 02/13/2018 03:06 PM, Javier González wrote:
> With the inclusion of 2.0 support, we need a generic geometry that
> describes the OCSSD independently of the specification that it
> implements. Otherwise, geometry specific code is required, which
> complicates targets and makes maintenance much more difficult.
> 
> This patch refactors the identify path and populates a generic geometry
> that is then given to the targets on creation. Since the 2.0 geometry is
> much more abstract that 1.2, the generic geometry resembles 2.0, but it
> is not identical, as it needs to understand 1.2 abstractions too.
> 
> Signed-off-by: Javier González <javier@cnexlabs.com>
> ---
>   drivers/lightnvm/core.c          | 143 ++++++---------
>   drivers/lightnvm/pblk-core.c     |  16 +-
>   drivers/lightnvm/pblk-gc.c       |   2 +-
>   drivers/lightnvm/pblk-init.c     | 149 ++++++++-------
>   drivers/lightnvm/pblk-read.c     |   2 +-
>   drivers/lightnvm/pblk-recovery.c |  14 +-
>   drivers/lightnvm/pblk-rl.c       |   2 +-
>   drivers/lightnvm/pblk-sysfs.c    |  39 ++--
>   drivers/lightnvm/pblk-write.c    |   2 +-
>   drivers/lightnvm/pblk.h          | 105 +++++------
>   drivers/nvme/host/lightnvm.c     | 379 ++++++++++++++++++++++++---------------
>   include/linux/lightnvm.h         | 220 +++++++++++++----------
>   12 files changed, 586 insertions(+), 487 deletions(-)
> 
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index 9b1255b3e05e..80492fa6ee76 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -111,6 +111,7 @@ static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin,
>   static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
>   {
>   	struct nvm_dev *dev = tgt_dev->parent;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	struct nvm_dev_map *dev_map = tgt_dev->map;
>   	int i, j;
>   
> @@ -122,7 +123,7 @@ static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
>   		if (clear) {
>   			for (j = 0; j < ch_map->nr_luns; j++) {
>   				int lun = j + lun_offs[j];
> -				int lunid = (ch * dev->geo.nr_luns) + lun;
> +				int lunid = (ch * dev_geo->num_lun) + lun;
>   
>   				WARN_ON(!test_and_clear_bit(lunid,
>   							dev->lun_map));
> @@ -143,19 +144,20 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
>   					      u16 lun_begin, u16 lun_end,
>   					      u16 op)
>   {
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	struct nvm_tgt_dev *tgt_dev = NULL;
>   	struct nvm_dev_map *dev_rmap = dev->rmap;
>   	struct nvm_dev_map *dev_map;
>   	struct ppa_addr *luns;
>   	int nr_luns = lun_end - lun_begin + 1;
>   	int luns_left = nr_luns;
> -	int nr_chnls = nr_luns / dev->geo.nr_luns;
> -	int nr_chnls_mod = nr_luns % dev->geo.nr_luns;
> -	int bch = lun_begin / dev->geo.nr_luns;
> -	int blun = lun_begin % dev->geo.nr_luns;
> +	int nr_chnls = nr_luns / dev_geo->num_lun;
> +	int nr_chnls_mod = nr_luns % dev_geo->num_lun;
> +	int bch = lun_begin / dev_geo->num_lun;
> +	int blun = lun_begin % dev_geo->num_lun;
>   	int lunid = 0;
>   	int lun_balanced = 1;
> -	int prev_nr_luns;
> +	int sec_per_lun, prev_nr_luns;
>   	int i, j;
>   
>   	nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1;
> @@ -173,15 +175,15 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
>   	if (!luns)
>   		goto err_luns;
>   
> -	prev_nr_luns = (luns_left > dev->geo.nr_luns) ?
> -					dev->geo.nr_luns : luns_left;
> +	prev_nr_luns = (luns_left > dev_geo->num_lun) ?
> +					dev_geo->num_lun : luns_left;
>   	for (i = 0; i < nr_chnls; i++) {
>   		struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
>   		int *lun_roffs = ch_rmap->lun_offs;
>   		struct nvm_ch_map *ch_map = &dev_map->chnls[i];
>   		int *lun_offs;
> -		int luns_in_chnl = (luns_left > dev->geo.nr_luns) ?
> -					dev->geo.nr_luns : luns_left;
> +		int luns_in_chnl = (luns_left > dev_geo->num_lun) ?
> +					dev_geo->num_lun : luns_left;
>   
>   		if (lun_balanced && prev_nr_luns != luns_in_chnl)
>   			lun_balanced = 0;
> @@ -215,18 +217,23 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
>   	if (!tgt_dev)
>   		goto err_ch;
>   
> -	memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
>   	/* Target device only owns a portion of the physical device */
> -	tgt_dev->geo.nr_chnls = nr_chnls;
> +	tgt_dev->geo.num_ch = nr_chnls;
> +	tgt_dev->geo.num_lun = (lun_balanced) ? prev_nr_luns : -1;
>   	tgt_dev->geo.all_luns = nr_luns;
> -	tgt_dev->geo.nr_luns = (lun_balanced) ? prev_nr_luns : -1;
> +	tgt_dev->geo.all_chunks = nr_luns * dev_geo->c.num_chk;
> +
> +	tgt_dev->geo.max_rq_size = dev->ops->max_phys_sect * dev_geo->c.csecs;
>   	tgt_dev->geo.op = op;
> -	tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
> +
> +	sec_per_lun = dev_geo->c.clba * dev_geo->c.num_chk;
> +	tgt_dev->geo.total_secs = nr_luns * sec_per_lun;
> +
> +	tgt_dev->geo.c = dev_geo->c;
> +
>   	tgt_dev->q = dev->q;
>   	tgt_dev->map = dev_map;
>   	tgt_dev->luns = luns;
> -	memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
> -
>   	tgt_dev->parent = dev;
>   
>   	return tgt_dev;
> @@ -268,12 +275,12 @@ static struct nvm_tgt_type *nvm_find_target_type(const char *name)
>   	return tt;
>   }
>   
> -static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
> +static int nvm_config_check_luns(struct nvm_dev_geo *dev_geo, int lun_begin,
>   				 int lun_end)
>   {
> -	if (lun_begin > lun_end || lun_end >= geo->all_luns) {
> +	if (lun_begin > lun_end || lun_end >= dev_geo->all_luns) {
>   		pr_err("nvm: lun out of bound (%u:%u > %u)\n",
> -			lun_begin, lun_end, geo->all_luns - 1);
> +			lun_begin, lun_end, dev_geo->all_luns - 1);
>   		return -EINVAL;
>   	}
>   
> @@ -283,24 +290,24 @@ static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
>   static int __nvm_config_simple(struct nvm_dev *dev,
>   			       struct nvm_ioctl_create_simple *s)
>   {
> -	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   
>   	if (s->lun_begin == -1 && s->lun_end == -1) {
>   		s->lun_begin = 0;
> -		s->lun_end = geo->all_luns - 1;
> +		s->lun_end = dev_geo->all_luns - 1;
>   	}
>   
> -	return nvm_config_check_luns(geo, s->lun_begin, s->lun_end);
> +	return nvm_config_check_luns(dev_geo, s->lun_begin, s->lun_end);
>   }
>   
>   static int __nvm_config_extended(struct nvm_dev *dev,
>   				 struct nvm_ioctl_create_extended *e)
>   {
> -	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   
>   	if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) {
>   		e->lun_begin = 0;
> -		e->lun_end = dev->geo.all_luns - 1;
> +		e->lun_end = dev_geo->all_luns - 1;
>   	}
>   
>   	/* op not set falls into target's default */
> @@ -313,7 +320,7 @@ static int __nvm_config_extended(struct nvm_dev *dev,
>   		return -EINVAL;
>   	}
>   
> -	return nvm_config_check_luns(geo, e->lun_begin, e->lun_end);
> +	return nvm_config_check_luns(dev_geo, e->lun_begin, e->lun_end);
>   }
>   
>   static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
> @@ -496,6 +503,7 @@ static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove)
>   
>   static int nvm_register_map(struct nvm_dev *dev)
>   {
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	struct nvm_dev_map *rmap;
>   	int i, j;
>   
> @@ -503,15 +511,15 @@ static int nvm_register_map(struct nvm_dev *dev)
>   	if (!rmap)
>   		goto err_rmap;
>   
> -	rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map),
> +	rmap->chnls = kcalloc(dev_geo->num_ch, sizeof(struct nvm_ch_map),
>   								GFP_KERNEL);
>   	if (!rmap->chnls)
>   		goto err_chnls;
>   
> -	for (i = 0; i < dev->geo.nr_chnls; i++) {
> +	for (i = 0; i < dev_geo->num_ch; i++) {
>   		struct nvm_ch_map *ch_rmap;
>   		int *lun_roffs;
> -		int luns_in_chnl = dev->geo.nr_luns;
> +		int luns_in_chnl = dev_geo->num_lun;
>   
>   		ch_rmap = &rmap->chnls[i];
>   
> @@ -542,10 +550,11 @@ static int nvm_register_map(struct nvm_dev *dev)
>   
>   static void nvm_unregister_map(struct nvm_dev *dev)
>   {
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	struct nvm_dev_map *rmap = dev->rmap;
>   	int i;
>   
> -	for (i = 0; i < dev->geo.nr_chnls; i++)
> +	for (i = 0; i < dev_geo->num_ch; i++)
>   		kfree(rmap->chnls[i].lun_offs);
>   
>   	kfree(rmap->chnls);
> @@ -674,7 +683,7 @@ static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
>   	int i, plane_cnt, pl_idx;
>   	struct ppa_addr ppa;
>   
> -	if (geo->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
> +	if (geo->c.pln_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
>   		rqd->nr_ppas = nr_ppas;
>   		rqd->ppa_addr = ppas[0];
>   
> @@ -688,7 +697,7 @@ static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
>   		return -ENOMEM;
>   	}
>   
> -	plane_cnt = geo->plane_mode;
> +	plane_cnt = geo->c.pln_mode;
>   	rqd->nr_ppas *= plane_cnt;
>   
>   	for (i = 0; i < nr_ppas; i++) {
> @@ -811,18 +820,18 @@ EXPORT_SYMBOL(nvm_end_io);
>    */
>   int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
>   {
> -	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	int blk, offset, pl, blktype;
>   
> -	if (nr_blks != geo->nr_chks * geo->plane_mode)
> +	if (nr_blks != dev_geo->c.num_chk * dev_geo->c.pln_mode)
>   		return -EINVAL;
>   
> -	for (blk = 0; blk < geo->nr_chks; blk++) {
> -		offset = blk * geo->plane_mode;
> +	for (blk = 0; blk < dev_geo->c.num_chk; blk++) {
> +		offset = blk * dev_geo->c.pln_mode;
>   		blktype = blks[offset];
>   
>   		/* Bad blocks on any planes take precedence over other types */
> -		for (pl = 0; pl < geo->plane_mode; pl++) {
> +		for (pl = 0; pl < dev_geo->c.pln_mode; pl++) {
>   			if (blks[offset + pl] &
>   					(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
>   				blktype = blks[offset + pl];
> @@ -833,7 +842,7 @@ int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
>   		blks[blk] = blktype;
>   	}
>   
> -	return geo->nr_chks;
> +	return dev_geo->c.num_chk;
>   }
>   EXPORT_SYMBOL(nvm_bb_tbl_fold);
>   
> @@ -850,44 +859,10 @@ EXPORT_SYMBOL(nvm_get_tgt_bb_tbl);
>   
>   static int nvm_core_init(struct nvm_dev *dev)
>   {
> -	struct nvm_id *id = &dev->identity;
> -	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	int ret;
>   
> -	memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
> -
> -	if (id->mtype != 0) {
> -		pr_err("nvm: memory type not supported\n");
> -		return -EINVAL;
> -	}
> -
> -	/* Whole device values */
> -	geo->nr_chnls = id->num_ch;
> -	geo->nr_luns = id->num_lun;
> -
> -	/* Generic device geometry values */
> -	geo->ws_min = id->ws_min;
> -	geo->ws_opt = id->ws_opt;
> -	geo->ws_seq = id->ws_seq;
> -	geo->ws_per_chk = id->ws_per_chk;
> -	geo->nr_chks = id->num_chk;
> -	geo->sec_size = id->csecs;
> -	geo->oob_size = id->sos;
> -	geo->mccap = id->mccap;
> -	geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size;
> -
> -	geo->sec_per_chk = id->clba;
> -	geo->sec_per_lun = geo->sec_per_chk * geo->nr_chks;
> -	geo->all_luns = geo->nr_luns * geo->nr_chnls;
> -
> -	/* 1.2 spec device geometry values */
> -	geo->plane_mode = 1 << geo->ws_seq;
> -	geo->nr_planes = geo->ws_opt / geo->ws_min;
> -	geo->sec_per_pg = geo->ws_min;
> -	geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes;
> -
> -	dev->total_secs = geo->all_luns * geo->sec_per_lun;
> -	dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns),
> +	dev->lun_map = kcalloc(BITS_TO_LONGS(dev_geo->all_luns),
>   					sizeof(unsigned long), GFP_KERNEL);
>   	if (!dev->lun_map)
>   		return -ENOMEM;
> @@ -901,7 +876,7 @@ static int nvm_core_init(struct nvm_dev *dev)
>   	if (ret)
>   		goto err_fmtype;
>   
> -	blk_queue_logical_block_size(dev->q, geo->sec_size);
> +	blk_queue_logical_block_size(dev->q, dev_geo->c.csecs);
>   	return 0;
>   err_fmtype:
>   	kfree(dev->lun_map);
> @@ -923,19 +898,17 @@ static void nvm_free(struct nvm_dev *dev)
>   
>   static int nvm_init(struct nvm_dev *dev)
>   {
> -	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_dev_geo *dev_geo = &dev->dev_geo;
>   	int ret = -EINVAL;
>   
> -	if (dev->ops->identity(dev, &dev->identity)) {
> +	if (dev->ops->identity(dev)) {
>   		pr_err("nvm: device could not be identified\n");
>   		goto err;
>   	}
>   
> -	if (dev->identity.ver_id != 1 && dev->identity.ver_id != 2) {
> -		pr_err("nvm: device ver_id %d not supported by kernel.\n",
> -				dev->identity.ver_id);
> -		goto err;
> -	}
> +	pr_debug("nvm: ver:%u.%u nvm_vendor:%x\n",
> +				dev_geo->major_ver_id, dev_geo->minor_ver_id,
> +				dev_geo->c.vmnt);
>   
>   	ret = nvm_core_init(dev);
>   	if (ret) {
> @@ -943,10 +916,10 @@ static int nvm_init(struct nvm_dev *dev)
>   		goto err;
>   	}
>   
> -	pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
> -			dev->name, geo->sec_per_pg, geo->nr_planes,
> -			geo->ws_per_chk, geo->nr_chks,
> -			geo->all_luns, geo->nr_chnls);
> +	pr_info("nvm: registered %s [%u/%u/%u/%u/%u]\n",
> +			dev->name, dev_geo->c.ws_min, dev_geo->c.ws_opt,
> +			dev_geo->c.num_chk, dev_geo->all_luns,
> +			dev_geo->num_ch);
>   	return 0;
>   err:
>   	pr_err("nvm: failed to initialize nvm\n");
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 22e61cd4f801..519af8b9eab7 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -613,7 +613,7 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
>   	memset(&rqd, 0, sizeof(struct nvm_rq));
>   
>   	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   
>   	bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len,
>   					l_mg->emeta_alloc_type, GFP_KERNEL);
> @@ -722,7 +722,7 @@ u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
>   	if (bit >= lm->blk_per_line)
>   		return -1;
>   
> -	return bit * geo->sec_per_pl;
> +	return bit * geo->c.ws_opt;
>   }
>   
>   static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
> @@ -1035,19 +1035,19 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
>   	/* Capture bad block information on line mapping bitmaps */
>   	while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line,
>   					bit + 1)) < lm->blk_per_line) {
> -		off = bit * geo->sec_per_pl;
> +		off = bit * geo->c.ws_opt;
>   		bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off,
>   							lm->sec_per_line);
>   		bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux,
>   							lm->sec_per_line);
> -		line->sec_in_line -= geo->sec_per_chk;
> +		line->sec_in_line -= geo->c.clba;
>   		if (bit >= lm->emeta_bb)
>   			nr_bb++;
>   	}
>   
>   	/* Mark smeta metadata sectors as bad sectors */
>   	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
> -	off = bit * geo->sec_per_pl;
> +	off = bit * geo->c.ws_opt;
>   	bitmap_set(line->map_bitmap, off, lm->smeta_sec);
>   	line->sec_in_line -= lm->smeta_sec;
>   	line->smeta_ssec = off;
> @@ -1066,10 +1066,10 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
>   	emeta_secs = lm->emeta_sec[0];
>   	off = lm->sec_per_line;
>   	while (emeta_secs) {
> -		off -= geo->sec_per_pl;
> +		off -= geo->c.ws_opt;
>   		if (!test_bit(off, line->invalid_bitmap)) {
> -			bitmap_set(line->invalid_bitmap, off, geo->sec_per_pl);
> -			emeta_secs -= geo->sec_per_pl;
> +			bitmap_set(line->invalid_bitmap, off, geo->c.ws_opt);
> +			emeta_secs -= geo->c.ws_opt;
>   		}
>   	}
>   
> diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
> index 320f99af99e9..16afea3f5541 100644
> --- a/drivers/lightnvm/pblk-gc.c
> +++ b/drivers/lightnvm/pblk-gc.c
> @@ -88,7 +88,7 @@ static void pblk_gc_line_ws(struct work_struct *work)
>   
>   	up(&gc->gc_sem);
>   
> -	gc_rq->data = vmalloc(gc_rq->nr_secs * geo->sec_size);
> +	gc_rq->data = vmalloc(gc_rq->nr_secs * geo->c.csecs);
>   	if (!gc_rq->data) {
>   		pr_err("pblk: could not GC line:%d (%d/%d)\n",
>   					line->id, *line->vsc, gc_rq->nr_secs);
> diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
> index 86a94a7faa96..72b7902e5d1c 100644
> --- a/drivers/lightnvm/pblk-init.c
> +++ b/drivers/lightnvm/pblk-init.c
> @@ -80,7 +80,7 @@ static size_t pblk_trans_map_size(struct pblk *pblk)
>   {
>   	int entry_size = 8;
>   
> -	if (pblk->ppaf_bitsize < 32)
> +	if (pblk->addrf_len < 32)
>   		entry_size = 4;
>   
>   	return entry_size * pblk->rl.nr_secs;
> @@ -146,7 +146,7 @@ static int pblk_rwb_init(struct pblk *pblk)
>   		return -ENOMEM;
>   
>   	power_size = get_count_order(nr_entries);
> -	power_seg_sz = get_count_order(geo->sec_size);
> +	power_seg_sz = get_count_order(geo->c.csecs);
>   
>   	return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz);
>   }
> @@ -154,47 +154,63 @@ static int pblk_rwb_init(struct pblk *pblk)
>   /* Minimum pages needed within a lun */
>   #define ADDR_POOL_SIZE 64
>   
> -static int pblk_set_ppaf(struct pblk *pblk)
> +static int pblk_set_addrf_12(struct nvm_geo *geo,
> +			     struct nvm_addr_format_12 *dst)
>   {
> -	struct nvm_tgt_dev *dev = pblk->dev;
> -	struct nvm_geo *geo = &dev->geo;
> -	struct nvm_addr_format ppaf = geo->ppaf;
> +	struct nvm_addr_format_12 *src =
> +				(struct nvm_addr_format_12 *)&geo->c.addrf;
>   	int power_len;
>   
>   	/* Re-calculate channel and lun format to adapt to configuration */
> -	power_len = get_count_order(geo->nr_chnls);
> -	if (1 << power_len != geo->nr_chnls) {
> +	power_len = get_count_order(geo->num_ch);
> +	if (1 << power_len != geo->num_ch) {
>   		pr_err("pblk: supports only power-of-two channel config.\n");
>   		return -EINVAL;
>   	}
> -	ppaf.ch_len = power_len;
> +	dst->ch_len = power_len;
>   
> -	power_len = get_count_order(geo->nr_luns);
> -	if (1 << power_len != geo->nr_luns) {
> +	power_len = get_count_order(geo->num_lun);
> +	if (1 << power_len != geo->num_lun) {
>   		pr_err("pblk: supports only power-of-two LUN config.\n");
>   		return -EINVAL;
>   	}
> -	ppaf.lun_len = power_len;
> +	dst->lun_len = power_len;
>   
> -	pblk->ppaf.sec_offset = 0;
> -	pblk->ppaf.pln_offset = ppaf.sect_len;
> -	pblk->ppaf.ch_offset = pblk->ppaf.pln_offset + ppaf.pln_len;
> -	pblk->ppaf.lun_offset = pblk->ppaf.ch_offset + ppaf.ch_len;
> -	pblk->ppaf.pg_offset = pblk->ppaf.lun_offset + ppaf.lun_len;
> -	pblk->ppaf.blk_offset = pblk->ppaf.pg_offset + ppaf.pg_len;
> -	pblk->ppaf.sec_mask = (1ULL << ppaf.sect_len) - 1;
> -	pblk->ppaf.pln_mask = ((1ULL << ppaf.pln_len) - 1) <<
> -							pblk->ppaf.pln_offset;
> -	pblk->ppaf.ch_mask = ((1ULL << ppaf.ch_len) - 1) <<
> -							pblk->ppaf.ch_offset;
> -	pblk->ppaf.lun_mask = ((1ULL << ppaf.lun_len) - 1) <<
> -							pblk->ppaf.lun_offset;
> -	pblk->ppaf.pg_mask = ((1ULL << ppaf.pg_len) - 1) <<
> -							pblk->ppaf.pg_offset;
> -	pblk->ppaf.blk_mask = ((1ULL << ppaf.blk_len) - 1) <<
> -							pblk->ppaf.blk_offset;
> +	dst->blk_len = src->blk_len;
> +	dst->pg_len = src->pg_len;
> +	dst->pln_len = src->pln_len;
> +	dst->sec_len = src->sec_len;
>   
> -	pblk->ppaf_bitsize = pblk->ppaf.blk_offset + ppaf.blk_len;
> +	dst->sec_offset = 0;
> +	dst->pln_offset = dst->sec_len;
> +	dst->ch_offset = dst->pln_offset + dst->pln_len;
> +	dst->lun_offset = dst->ch_offset + dst->ch_len;
> +	dst->pg_offset = dst->lun_offset + dst->lun_len;
> +	dst->blk_offset = dst->pg_offset + dst->pg_len;
> +
> +	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
> +	dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset;
> +	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
> +	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
> +	dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset;
> +	dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset;
> +
> +	return dst->blk_offset + src->blk_len;
> +}
> +
> +static int pblk_set_addrf(struct pblk *pblk)
> +{
> +	struct nvm_tgt_dev *dev = pblk->dev;
> +	struct nvm_geo *geo = &dev->geo;
> +	int mod;
> +
> +	div_u64_rem(geo->c.clba, pblk->min_write_pgs, &mod);
> +	if (mod) {
> +		pr_err("pblk: bad configuration of sectors/pages\n");
> +		return -EINVAL;
> +	}
> +
> +	pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf);
>   
>   	return 0;
>   }
> @@ -253,8 +269,7 @@ static int pblk_core_init(struct pblk *pblk)
>   	struct nvm_tgt_dev *dev = pblk->dev;
>   	struct nvm_geo *geo = &dev->geo;
>   
> -	pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg *
> -						geo->nr_planes * geo->all_luns;
> +	pblk->pgs_in_buffer = geo->c.mw_cunits * geo->c.ws_opt * geo->all_luns;
>   
>   	if (pblk_init_global_caches(pblk))
>   		return -ENOMEM;
> @@ -305,7 +320,7 @@ static int pblk_core_init(struct pblk *pblk)
>   	if (!pblk->r_end_wq)
>   		goto free_bb_wq;
>   
> -	if (pblk_set_ppaf(pblk))
> +	if (pblk_set_addrf(pblk))
>   		goto free_r_end_wq;
>   
>   	if (pblk_rwb_init(pblk))
> @@ -434,7 +449,7 @@ static void *pblk_bb_get_log(struct pblk *pblk)
>   	int i, nr_blks, blk_per_lun;
>   	int ret;
>   
> -	blk_per_lun = geo->nr_chks * geo->plane_mode;
> +	blk_per_lun = geo->c.num_chk * geo->c.pln_mode;
>   	nr_blks = blk_per_lun * geo->all_luns;
>   
>   	log = kmalloc(nr_blks, GFP_KERNEL);
> @@ -484,7 +499,7 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
>   	int i;
>   
>   	/* TODO: Implement unbalanced LUN support */
> -	if (geo->nr_luns < 0) {
> +	if (geo->num_lun < 0) {
>   		pr_err("pblk: unbalanced LUN config.\n");
>   		return -EINVAL;
>   	}
> @@ -496,9 +511,9 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
>   
>   	for (i = 0; i < geo->all_luns; i++) {
>   		/* Stripe across channels */
> -		int ch = i % geo->nr_chnls;
> -		int lun_raw = i / geo->nr_chnls;
> -		int lunid = lun_raw + ch * geo->nr_luns;
> +		int ch = i % geo->num_ch;
> +		int lun_raw = i / geo->num_ch;
> +		int lunid = lun_raw + ch * geo->num_lun;
>   
>   		rlun = &pblk->luns[i];
>   		rlun->bppa = luns[lunid];
> @@ -552,18 +567,18 @@ static unsigned int calc_emeta_len(struct pblk *pblk)
>   	/* Round to sector size so that lba_list starts on its own sector */
>   	lm->emeta_sec[1] = DIV_ROUND_UP(
>   			sizeof(struct line_emeta) + lm->blk_bitmap_len +
> -			sizeof(struct wa_counters), geo->sec_size);
> -	lm->emeta_len[1] = lm->emeta_sec[1] * geo->sec_size;
> +			sizeof(struct wa_counters), geo->c.csecs);
> +	lm->emeta_len[1] = lm->emeta_sec[1] * geo->c.csecs;
>   
>   	/* Round to sector size so that vsc_list starts on its own sector */
>   	lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0];
>   	lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64),
> -			geo->sec_size);
> -	lm->emeta_len[2] = lm->emeta_sec[2] * geo->sec_size;
> +			geo->c.csecs);
> +	lm->emeta_len[2] = lm->emeta_sec[2] * geo->c.csecs;
>   
>   	lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32),
> -			geo->sec_size);
> -	lm->emeta_len[3] = lm->emeta_sec[3] * geo->sec_size;
> +			geo->c.csecs);
> +	lm->emeta_len[3] = lm->emeta_sec[3] * geo->c.csecs;
>   
>   	lm->vsc_list_len = l_mg->nr_lines * sizeof(u32);
>   
> @@ -594,13 +609,13 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks)
>   	 * on user capacity consider only provisioned blocks
>   	 */
>   	pblk->rl.total_blocks = nr_free_blks;
> -	pblk->rl.nr_secs = nr_free_blks * geo->sec_per_chk;
> +	pblk->rl.nr_secs = nr_free_blks * geo->c.clba;
>   
>   	/* Consider sectors used for metadata */
>   	sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines;
> -	blk_meta = DIV_ROUND_UP(sec_meta, geo->sec_per_chk);
> +	blk_meta = DIV_ROUND_UP(sec_meta, geo->c.clba);
>   
> -	pblk->capacity = (provisioned - blk_meta) * geo->sec_per_chk;
> +	pblk->capacity = (provisioned - blk_meta) * geo->c.clba;
>   
>   	atomic_set(&pblk->rl.free_blocks, nr_free_blks);
>   	atomic_set(&pblk->rl.free_user_blocks, nr_free_blks);
> @@ -711,10 +726,10 @@ static int pblk_lines_init(struct pblk *pblk)
>   	void *chunk_log;
>   	unsigned int smeta_len, emeta_len;
>   	long nr_bad_blks = 0, nr_free_blks = 0;
> -	int bb_distance, max_write_ppas, mod;
> +	int bb_distance, max_write_ppas;
>   	int i, ret;
>   
> -	pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE);
> +	pblk->min_write_pgs = geo->c.ws_opt * (geo->c.csecs / PAGE_SIZE);
>   	max_write_ppas = pblk->min_write_pgs * geo->all_luns;
>   	pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ?
>   				max_write_ppas : nvm_max_phys_sects(dev);
> @@ -725,19 +740,13 @@ static int pblk_lines_init(struct pblk *pblk)
>   		return -EINVAL;
>   	}
>   
> -	div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod);
> -	if (mod) {
> -		pr_err("pblk: bad configuration of sectors/pages\n");
> -		return -EINVAL;
> -	}
> -
> -	l_mg->nr_lines = geo->nr_chks;
> +	l_mg->nr_lines = geo->c.num_chk;
>   	l_mg->log_line = l_mg->data_line = NULL;
>   	l_mg->l_seq_nr = l_mg->d_seq_nr = 0;
>   	l_mg->nr_free_lines = 0;
>   	bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES);
>   
> -	lm->sec_per_line = geo->sec_per_chk * geo->all_luns;
> +	lm->sec_per_line = geo->c.clba * geo->all_luns;
>   	lm->blk_per_line = geo->all_luns;
>   	lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long);
>   	lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long);
> @@ -751,8 +760,8 @@ static int pblk_lines_init(struct pblk *pblk)
>   	 */
>   	i = 1;
>   add_smeta_page:
> -	lm->smeta_sec = i * geo->sec_per_pl;
> -	lm->smeta_len = lm->smeta_sec * geo->sec_size;
> +	lm->smeta_sec = i * geo->c.ws_opt;
> +	lm->smeta_len = lm->smeta_sec * geo->c.csecs;
>   
>   	smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len;
>   	if (smeta_len > lm->smeta_len) {
> @@ -765,8 +774,8 @@ static int pblk_lines_init(struct pblk *pblk)
>   	 */
>   	i = 1;
>   add_emeta_page:
> -	lm->emeta_sec[0] = i * geo->sec_per_pl;
> -	lm->emeta_len[0] = lm->emeta_sec[0] * geo->sec_size;
> +	lm->emeta_sec[0] = i * geo->c.ws_opt;
> +	lm->emeta_len[0] = lm->emeta_sec[0] * geo->c.csecs;
>   
>   	emeta_len = calc_emeta_len(pblk);
>   	if (emeta_len > lm->emeta_len[0]) {
> @@ -779,7 +788,7 @@ static int pblk_lines_init(struct pblk *pblk)
>   	lm->min_blk_line = 1;
>   	if (geo->all_luns > 1)
>   		lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec +
> -					lm->emeta_sec[0], geo->sec_per_chk);
> +					lm->emeta_sec[0], geo->c.clba);
>   
>   	if (lm->min_blk_line > lm->blk_per_line) {
>   		pr_err("pblk: config. not supported. Min. LUN in line:%d\n",
> @@ -803,9 +812,9 @@ static int pblk_lines_init(struct pblk *pblk)
>   		goto fail_free_bb_template;
>   	}
>   
> -	bb_distance = (geo->all_luns) * geo->sec_per_pl;
> +	bb_distance = (geo->all_luns) * geo->c.ws_opt;
>   	for (i = 0; i < lm->sec_per_line; i += bb_distance)
> -		bitmap_set(l_mg->bb_template, i, geo->sec_per_pl);
> +		bitmap_set(l_mg->bb_template, i, geo->c.ws_opt);
>   
>   	INIT_LIST_HEAD(&l_mg->free_list);
>   	INIT_LIST_HEAD(&l_mg->corrupt_list);
> @@ -982,9 +991,15 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
>   	struct pblk *pblk;
>   	int ret;
>   
> -	if (dev->identity.dom & NVM_RSP_L2P) {
> +	if (geo->c.version != NVM_OCSSD_SPEC_12) {
> +		pr_err("pblk: OCSSD version not supported (%u)\n",
> +							geo->c.version);
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	if (geo->c.version == NVM_OCSSD_SPEC_12 && geo->c.dom & NVM_RSP_L2P) {
>   		pr_err("pblk: host-side L2P table not supported. (%x)\n",
> -							dev->identity.dom);
> +							geo->c.dom);
>   		return ERR_PTR(-EINVAL);
>   	}
>   
> @@ -1092,7 +1107,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
>   
>   	blk_queue_write_cache(tqueue, true, false);
>   
> -	tqueue->limits.discard_granularity = geo->sec_per_chk * geo->sec_size;
> +	tqueue->limits.discard_granularity = geo->c.clba * geo->c.csecs;
>   	tqueue->limits.discard_alignment = 0;
>   	blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9);
>   	queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue);
> diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
> index 2f761283f43e..ebb6bae3a3b8 100644
> --- a/drivers/lightnvm/pblk-read.c
> +++ b/drivers/lightnvm/pblk-read.c
> @@ -563,7 +563,7 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
>   	if (!(gc_rq->secs_to_gc))
>   		goto out;
>   
> -	data_len = (gc_rq->secs_to_gc) * geo->sec_size;
> +	data_len = (gc_rq->secs_to_gc) * geo->c.csecs;
>   	bio = pblk_bio_map_addr(pblk, gc_rq->data, gc_rq->secs_to_gc, data_len,
>   						PBLK_VMALLOC_META, GFP_KERNEL);
>   	if (IS_ERR(bio)) {
> diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
> index e75a1af2eebe..beacef1412a2 100644
> --- a/drivers/lightnvm/pblk-recovery.c
> +++ b/drivers/lightnvm/pblk-recovery.c
> @@ -188,7 +188,7 @@ static int pblk_calc_sec_in_line(struct pblk *pblk, struct pblk_line *line)
>   	int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line);
>   
>   	return lm->sec_per_line - lm->smeta_sec - lm->emeta_sec[0] -
> -				nr_bb * geo->sec_per_chk;
> +				nr_bb * geo->c.clba;
>   }
>   
>   struct pblk_recov_alloc {
> @@ -236,7 +236,7 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
>   	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
>   	if (!rq_ppas)
>   		rq_ppas = pblk->min_write_pgs;
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   
>   	bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL);
>   	if (IS_ERR(bio))
> @@ -355,7 +355,7 @@ static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line,
>   	if (!pad_rq)
>   		return -ENOMEM;
>   
> -	data = vzalloc(pblk->max_write_pgs * geo->sec_size);
> +	data = vzalloc(pblk->max_write_pgs * geo->c.csecs);
>   	if (!data) {
>   		ret = -ENOMEM;
>   		goto free_rq;
> @@ -372,7 +372,7 @@ static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line,
>   		goto fail_free_pad;
>   	}
>   
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   
>   	meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list);
>   	if (!meta_list) {
> @@ -513,7 +513,7 @@ static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line,
>   	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
>   	if (!rq_ppas)
>   		rq_ppas = pblk->min_write_pgs;
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   
>   	bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL);
>   	if (IS_ERR(bio))
> @@ -644,7 +644,7 @@ static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line,
>   	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
>   	if (!rq_ppas)
>   		rq_ppas = pblk->min_write_pgs;
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   
>   	bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL);
>   	if (IS_ERR(bio))
> @@ -749,7 +749,7 @@ static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
>   	ppa_list = (void *)(meta_list) + pblk_dma_meta_size;
>   	dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
>   
> -	data = kcalloc(pblk->max_write_pgs, geo->sec_size, GFP_KERNEL);
> +	data = kcalloc(pblk->max_write_pgs, geo->c.csecs, GFP_KERNEL);
>   	if (!data) {
>   		ret = -ENOMEM;
>   		goto free_meta_list;
> diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
> index 0d457b162f23..bcab203477ec 100644
> --- a/drivers/lightnvm/pblk-rl.c
> +++ b/drivers/lightnvm/pblk-rl.c
> @@ -200,7 +200,7 @@ void pblk_rl_init(struct pblk_rl *rl, int budget)
>   
>   	/* Consider sectors used for metadata */
>   	sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines;
> -	blk_meta = DIV_ROUND_UP(sec_meta, geo->sec_per_chk);
> +	blk_meta = DIV_ROUND_UP(sec_meta, geo->c.clba);
>   
>   	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;
>   	rl->high_pw = get_count_order(rl->high);
> diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
> index d93e9b1f083a..d3b50741b691 100644
> --- a/drivers/lightnvm/pblk-sysfs.c
> +++ b/drivers/lightnvm/pblk-sysfs.c
> @@ -113,26 +113,31 @@ static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
>   {
>   	struct nvm_tgt_dev *dev = pblk->dev;
>   	struct nvm_geo *geo = &dev->geo;
> +	struct nvm_addr_format_12 *ppaf;
> +	struct nvm_addr_format_12 *geo_ppaf;
>   	ssize_t sz = 0;
>   
> -	sz = snprintf(page, PAGE_SIZE - sz,
> -		"g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
> -		pblk->ppaf_bitsize,
> -		pblk->ppaf.blk_offset, geo->ppaf.blk_len,
> -		pblk->ppaf.pg_offset, geo->ppaf.pg_len,
> -		pblk->ppaf.lun_offset, geo->ppaf.lun_len,
> -		pblk->ppaf.ch_offset, geo->ppaf.ch_len,
> -		pblk->ppaf.pln_offset, geo->ppaf.pln_len,
> -		pblk->ppaf.sec_offset, geo->ppaf.sect_len);
> +	ppaf = (struct nvm_addr_format_12 *)&pblk->addrf;
> +	geo_ppaf = (struct nvm_addr_format_12 *)&geo->c.addrf;
> +
> +	sz = snprintf(page, PAGE_SIZE,
> +		"pblk:(s:%d)ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
> +			pblk->addrf_len,
> +			ppaf->ch_offset, ppaf->ch_len,
> +			ppaf->lun_offset, ppaf->lun_len,
> +			ppaf->blk_offset, ppaf->blk_len,
> +			ppaf->pg_offset, ppaf->pg_len,
> +			ppaf->pln_offset, ppaf->pln_len,
> +			ppaf->sec_offset, ppaf->sec_len);
>   
>   	sz += snprintf(page + sz, PAGE_SIZE - sz,
> -		"d:blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
> -		geo->ppaf.blk_offset, geo->ppaf.blk_len,
> -		geo->ppaf.pg_offset, geo->ppaf.pg_len,
> -		geo->ppaf.lun_offset, geo->ppaf.lun_len,
> -		geo->ppaf.ch_offset, geo->ppaf.ch_len,
> -		geo->ppaf.pln_offset, geo->ppaf.pln_len,
> -		geo->ppaf.sect_offset, geo->ppaf.sect_len);
> +		"device:ch:%d/%d,lun:%d/%d,blk:%d/%d,pg:%d/%d,pl:%d/%d,sec:%d/%d\n",
> +			geo_ppaf->ch_offset, geo_ppaf->ch_len,
> +			geo_ppaf->lun_offset, geo_ppaf->lun_len,
> +			geo_ppaf->blk_offset, geo_ppaf->blk_len,
> +			geo_ppaf->pg_offset, geo_ppaf->pg_len,
> +			geo_ppaf->pln_offset, geo_ppaf->pln_len,
> +			geo_ppaf->sec_offset, geo_ppaf->sec_len);
>   
>   	return sz;
>   }
> @@ -288,7 +293,7 @@ static ssize_t pblk_sysfs_lines_info(struct pblk *pblk, char *page)
>   				"blk_line:%d, sec_line:%d, sec_blk:%d\n",
>   					lm->blk_per_line,
>   					lm->sec_per_line,
> -					geo->sec_per_chk);
> +					geo->c.clba);
>   
>   	return sz;
>   }
> diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
> index aae86ed60b98..c49b27539d5a 100644
> --- a/drivers/lightnvm/pblk-write.c
> +++ b/drivers/lightnvm/pblk-write.c
> @@ -333,7 +333,7 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
>   	m_ctx = nvm_rq_to_pdu(rqd);
>   	m_ctx->private = meta_line;
>   
> -	rq_len = rq_ppas * geo->sec_size;
> +	rq_len = rq_ppas * geo->c.csecs;
>   	data = ((void *)emeta->buf) + emeta->mem;
>   
>   	bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len,
> diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
> index 282dfc8780e8..46b29a492f74 100644
> --- a/drivers/lightnvm/pblk.h
> +++ b/drivers/lightnvm/pblk.h
> @@ -551,21 +551,6 @@ struct pblk_line_meta {
>   	unsigned int meta_distance;	/* Distance between data and metadata */
>   };
>   
> -struct pblk_addr_format {
> -	u64	ch_mask;
> -	u64	lun_mask;
> -	u64	pln_mask;
> -	u64	blk_mask;
> -	u64	pg_mask;
> -	u64	sec_mask;
> -	u8	ch_offset;
> -	u8	lun_offset;
> -	u8	pln_offset;
> -	u8	blk_offset;
> -	u8	pg_offset;
> -	u8	sec_offset;
> -};
> -
>   enum {
>   	PBLK_STATE_RUNNING = 0,
>   	PBLK_STATE_STOPPING = 1,
> @@ -585,8 +570,8 @@ struct pblk {
>   	struct pblk_line_mgmt l_mg;		/* Line management */
>   	struct pblk_line_meta lm;		/* Line metadata */
>   
> -	int ppaf_bitsize;
> -	struct pblk_addr_format ppaf;
> +	struct nvm_addr_format addrf;
> +	int addrf_len;
>   
>   	struct pblk_rb rwb;
>   
> @@ -941,14 +926,12 @@ static inline int pblk_line_vsc(struct pblk_line *line)
>   	return le32_to_cpu(*line->vsc);
>   }
>   
> -#define NVM_MEM_PAGE_WRITE (8)
> -
>   static inline int pblk_pad_distance(struct pblk *pblk)
>   {
>   	struct nvm_tgt_dev *dev = pblk->dev;
>   	struct nvm_geo *geo = &dev->geo;
>   
> -	return NVM_MEM_PAGE_WRITE * geo->all_luns * geo->sec_per_pl;
> +	return geo->c.mw_cunits * geo->all_luns * geo->c.ws_opt;
>   }
>   
>   static inline int pblk_ppa_to_line(struct ppa_addr p)
> @@ -958,21 +941,23 @@ static inline int pblk_ppa_to_line(struct ppa_addr p)
>   
>   static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
>   {
> -	return p.g.lun * geo->nr_chnls + p.g.ch;
> +	return p.g.lun * geo->num_ch + p.g.ch;
>   }
>   
>   static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
>   					      u64 line_id)
>   {
> +	struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&pblk->addrf;
>   	struct ppa_addr ppa;
>   
>   	ppa.ppa = 0;
>   	ppa.g.blk = line_id;
> -	ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset;
> -	ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset;
> -	ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset;
> -	ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset;
> -	ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset;
> +	ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
> +	ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
> +	ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
> +	ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
> +	ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
>   
>   	return ppa;
>   }
> @@ -980,13 +965,15 @@ static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
>   static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
>   							struct ppa_addr p)
>   {
> +	struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&pblk->addrf;
>   	u64 paddr;
>   
> -	paddr = (u64)p.g.pg << pblk->ppaf.pg_offset;
> -	paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset;
> -	paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset;
> -	paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset;
> -	paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset;
> +	paddr = (u64)p.g.ch << ppaf->ch_offset;
> +	paddr |= (u64)p.g.lun << ppaf->lun_offset;
> +	paddr |= (u64)p.g.pg << ppaf->pg_offset;
> +	paddr |= (u64)p.g.pl << ppaf->pln_offset;
> +	paddr |= (u64)p.g.sec << ppaf->sec_offset;
>   
>   	return paddr;
>   }
> @@ -1003,18 +990,15 @@ static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
>   		ppa64.c.line = ppa32 & ((~0U) >> 1);
>   		ppa64.c.is_cached = 1;
>   	} else {
> -		ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >>
> -							pblk->ppaf.blk_offset;
> -		ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >>
> -							pblk->ppaf.pg_offset;
> -		ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >>
> -							pblk->ppaf.lun_offset;
> -		ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >>
> -							pblk->ppaf.ch_offset;
> -		ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >>
> -							pblk->ppaf.pln_offset;
> -		ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >>
> -							pblk->ppaf.sec_offset;
> +		struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&pblk->addrf;
> +
> +		ppa64.g.ch = (ppa32 & ppaf->ch_mask) >> ppaf->ch_offset;
> +		ppa64.g.lun = (ppa32 & ppaf->lun_mask) >> ppaf->lun_offset;
> +		ppa64.g.blk = (ppa32 & ppaf->blk_mask) >> ppaf->blk_offset;
> +		ppa64.g.pg = (ppa32 & ppaf->pg_mask) >> ppaf->pg_offset;
> +		ppa64.g.pl = (ppa32 & ppaf->pln_mask) >> ppaf->pln_offset;
> +		ppa64.g.sec = (ppa32 & ppaf->sec_mask) >> ppaf->sec_offset;
>   	}
>   
>   	return ppa64;
> @@ -1030,12 +1014,15 @@ static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
>   		ppa32 |= ppa64.c.line;
>   		ppa32 |= 1U << 31;
>   	} else {
> -		ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset;
> -		ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset;
> -		ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset;
> -		ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset;
> -		ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset;
> -		ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset;
> +		struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&pblk->addrf;
> +
> +		ppa32 |= ppa64.g.ch << ppaf->ch_offset;
> +		ppa32 |= ppa64.g.lun << ppaf->lun_offset;
> +		ppa32 |= ppa64.g.blk << ppaf->blk_offset;
> +		ppa32 |= ppa64.g.pg << ppaf->pg_offset;
> +		ppa32 |= ppa64.g.pl << ppaf->pln_offset;
> +		ppa32 |= ppa64.g.sec << ppaf->sec_offset;
>   	}
>   
>   	return ppa32;
> @@ -1046,7 +1033,7 @@ static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
>   {
>   	struct ppa_addr ppa;
>   
> -	if (pblk->ppaf_bitsize < 32) {
> +	if (pblk->addrf_len < 32) {
>   		u32 *map = (u32 *)pblk->trans_map;
>   
>   		ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
> @@ -1062,7 +1049,7 @@ static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
>   static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
>   						struct ppa_addr ppa)
>   {
> -	if (pblk->ppaf_bitsize < 32) {
> +	if (pblk->addrf_len < 32) {
>   		u32 *map = (u32 *)pblk->trans_map;
>   
>   		map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
> @@ -1153,7 +1140,7 @@ static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
>   	struct nvm_geo *geo = &dev->geo;
>   	int flags;
>   
> -	flags = geo->plane_mode >> 1;
> +	flags = geo->c.pln_mode >> 1;
>   
>   	if (type == PBLK_WRITE)
>   		flags |= NVM_IO_SCRAMBLE_ENABLE;
> @@ -1174,7 +1161,7 @@ static inline int pblk_set_read_mode(struct pblk *pblk, int type)
>   
>   	flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
>   	if (type == PBLK_READ_SEQUENTIAL)
> -		flags |= geo->plane_mode >> 1;
> +		flags |= geo->c.pln_mode >> 1;
>   
>   	return flags;
>   }
> @@ -1227,12 +1214,12 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
>   		ppa = &ppas[i];
>   
>   		if (!ppa->c.is_cached &&
> -				ppa->g.ch < geo->nr_chnls &&
> -				ppa->g.lun < geo->nr_luns &&
> -				ppa->g.pl < geo->nr_planes &&
> -				ppa->g.blk < geo->nr_chks &&
> -				ppa->g.pg < geo->ws_per_chk &&
> -				ppa->g.sec < geo->sec_per_pg)
> +				ppa->g.ch < geo->num_ch &&
> +				ppa->g.lun < geo->num_lun &&
> +				ppa->g.pl < geo->c.num_pln &&
> +				ppa->g.blk < geo->c.num_chk &&
> +				ppa->g.pg < geo->c.num_pg &&
> +				ppa->g.sec < geo->c.ws_min)
>   			continue;
>   
>   		print_ppa(ppa, "boundary", i);
> diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
> index a19e85f0cbae..97739e668602 100644
> --- a/drivers/nvme/host/lightnvm.c
> +++ b/drivers/nvme/host/lightnvm.c
> @@ -152,8 +152,8 @@ struct nvme_nvm_id12_addrf {
>   	__u8			blk_len;
>   	__u8			pg_offset;
>   	__u8			pg_len;
> -	__u8			sect_offset;
> -	__u8			sect_len;
> +	__u8			sec_offset;
> +	__u8			sec_len;
>   	__u8			res[4];
>   } __packed;
>   
> @@ -170,6 +170,12 @@ struct nvme_nvm_id12 {
>   	__u8			resv2[2880];
>   } __packed;
>   
> +/* Generic identification structure */
> +struct nvme_nvm_id {
> +	__u8			ver_id;
> +	__u8			resv[4095];
> +} __packed;
> +
>   struct nvme_nvm_bb_tbl {
>   	__u8	tblid[4];
>   	__le16	verid;
> @@ -254,121 +260,195 @@ static inline void _nvme_nvm_check_size(void)
>   	BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE);
>   }
>   
> -static int init_grp(struct nvm_id *nvm_id, struct nvme_nvm_id12 *id12)
> +static void nvme_nvm_set_addr_12(struct nvm_addr_format_12 *dst,
> +				 struct nvme_nvm_id12_addrf *src)
>   {
> +	dst->ch_len = src->ch_len;
> +	dst->lun_len = src->lun_len;
> +	dst->blk_len = src->blk_len;
> +	dst->pg_len = src->pg_len;
> +	dst->pln_len = src->pln_len;
> +	dst->sec_len = src->sec_len;
> +
> +	dst->ch_offset = src->ch_offset;
> +	dst->lun_offset = src->lun_offset;
> +	dst->blk_offset = src->blk_offset;
> +	dst->pg_offset = src->pg_offset;
> +	dst->pln_offset = src->pln_offset;
> +	dst->sec_offset = src->sec_offset;
> +
> +	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
> +	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
> +	dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset;
> +	dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset;
> +	dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset;
> +	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
> +}
> +
> +static int nvme_nvm_setup_12(struct nvme_nvm_id *gen_id,
> +			     struct nvm_dev_geo *dev_geo)
> +{
> +	struct nvme_nvm_id12 *id = (struct nvme_nvm_id12 *)gen_id;
>   	struct nvme_nvm_id12_grp *src;
>   	int sec_per_pg, sec_per_pl, pg_per_blk;
>   
> -	if (id12->cgrps != 1)
> +	if (id->cgrps != 1)
>   		return -EINVAL;
>   
> -	src = &id12->grp;
> +	src = &id->grp;
>   
> -	nvm_id->mtype = src->mtype;
> -	nvm_id->fmtype = src->fmtype;
> +	if (src->mtype != 0) {
> +		pr_err("nvm: memory type not supported\n");
> +		return -EINVAL;
> +	}
> +
> +	/* 1.2 spec. only reports a single version id - unfold */
> +	dev_geo->major_ver_id = 1;
> +	dev_geo->minor_ver_id = 2;
> +
> +	/* Set compacted version for upper layers */
> +	dev_geo->c.version = NVM_OCSSD_SPEC_12;
>   
> -	nvm_id->num_ch = src->num_ch;
> -	nvm_id->num_lun = src->num_lun;
> +	dev_geo->num_ch = src->num_ch;
> +	dev_geo->num_lun = src->num_lun;
> +	dev_geo->all_luns = dev_geo->num_ch * dev_geo->num_lun;
>   
> -	nvm_id->num_chk = le16_to_cpu(src->num_chk);
> -	nvm_id->csecs = le16_to_cpu(src->csecs);
> -	nvm_id->sos = le16_to_cpu(src->sos);
> +	dev_geo->c.num_chk = le16_to_cpu(src->num_chk);
> +	dev_geo->c.csecs = le16_to_cpu(src->csecs);
> +	dev_geo->c.sos = le16_to_cpu(src->sos);
>   
>   	pg_per_blk = le16_to_cpu(src->num_pg);
> -	sec_per_pg = le16_to_cpu(src->fpg_sz) / nvm_id->csecs;
> +	sec_per_pg = le16_to_cpu(src->fpg_sz) / dev_geo->c.csecs;
>   	sec_per_pl = sec_per_pg * src->num_pln;
> -	nvm_id->clba = sec_per_pl * pg_per_blk;
> -	nvm_id->ws_per_chk = pg_per_blk;
> -
> -	nvm_id->mpos = le32_to_cpu(src->mpos);
> -	nvm_id->cpar = le16_to_cpu(src->cpar);
> -	nvm_id->mccap = le32_to_cpu(src->mccap);
> -
> -	nvm_id->ws_opt = nvm_id->ws_min = sec_per_pg;
> -	nvm_id->ws_seq = NVM_IO_SNGL_ACCESS;
> -
> -	if (nvm_id->mpos & 0x020202) {
> -		nvm_id->ws_seq = NVM_IO_DUAL_ACCESS;
> -		nvm_id->ws_opt <<= 1;
> -	} else if (nvm_id->mpos & 0x040404) {
> -		nvm_id->ws_seq = NVM_IO_QUAD_ACCESS;
> -		nvm_id->ws_opt <<= 2;
> -	}
> +	dev_geo->c.clba = sec_per_pl * pg_per_blk;
> +
> +	dev_geo->c.ws_min = sec_per_pg;
> +	dev_geo->c.ws_opt = sec_per_pg;
> +	dev_geo->c.mw_cunits = 8;		/* default to MLC safe values */
> +	dev_geo->c.maxoc = dev_geo->all_luns;	/* default to 1 chunk per LUN */
> +	dev_geo->c.maxocpu = 1;			/* default to 1 chunk per LUN */
>   
> -	nvm_id->trdt = le32_to_cpu(src->trdt);
> -	nvm_id->trdm = le32_to_cpu(src->trdm);
> -	nvm_id->tprt = le32_to_cpu(src->tprt);
> -	nvm_id->tprm = le32_to_cpu(src->tprm);
> -	nvm_id->tbet = le32_to_cpu(src->tbet);
> -	nvm_id->tbem = le32_to_cpu(src->tbem);
> +	dev_geo->c.mccap = le32_to_cpu(src->mccap);
> +
> +	dev_geo->c.trdt = le32_to_cpu(src->trdt);
> +	dev_geo->c.trdm = le32_to_cpu(src->trdm);
> +	dev_geo->c.tprt = le32_to_cpu(src->tprt);
> +	dev_geo->c.tprm = le32_to_cpu(src->tprm);
> +	dev_geo->c.tbet = le32_to_cpu(src->tbet);
> +	dev_geo->c.tbem = le32_to_cpu(src->tbem);
>   
>   	/* 1.2 compatibility */
> -	nvm_id->num_pln = src->num_pln;
> -	nvm_id->num_pg = le16_to_cpu(src->num_pg);
> -	nvm_id->fpg_sz = le16_to_cpu(src->fpg_sz);
> +	dev_geo->c.vmnt = id->vmnt;
> +	dev_geo->c.cap = le32_to_cpu(id->cap);
> +	dev_geo->c.dom = le32_to_cpu(id->dom);
> +
> +	dev_geo->c.mtype = src->mtype;
> +	dev_geo->c.fmtype = src->fmtype;
> +
> +	dev_geo->c.cpar = le16_to_cpu(src->cpar);
> +	dev_geo->c.mpos = le32_to_cpu(src->mpos);
> +
> +	dev_geo->c.pln_mode = NVM_PLANE_SINGLE;
> +
> +	if (dev_geo->c.mpos & 0x020202) {
> +		dev_geo->c.pln_mode = NVM_PLANE_DOUBLE;
> +		dev_geo->c.ws_opt <<= 1;
> +	} else if (dev_geo->c.mpos & 0x040404) {
> +		dev_geo->c.pln_mode = NVM_PLANE_QUAD;
> +		dev_geo->c.ws_opt <<= 2;
> +	}
> +
> +	dev_geo->c.num_pln = src->num_pln;
> +	dev_geo->c.num_pg = le16_to_cpu(src->num_pg);
> +	dev_geo->c.fpg_sz = le16_to_cpu(src->fpg_sz);
> +
> +	nvme_nvm_set_addr_12((struct nvm_addr_format_12 *)&dev_geo->c.addrf,
> +								&id->ppaf);
>   
>   	return 0;
>   }
>   
> -static int nvme_nvm_setup_12(struct nvm_dev *nvmdev, struct nvm_id *nvm_id,
> -		struct nvme_nvm_id12 *id)
> +static void nvme_nvm_set_addr_20(struct nvm_addr_format *dst,
> +				 struct nvme_nvm_id20_addrf *src)
>   {
> -	nvm_id->ver_id = id->ver_id;
> -	nvm_id->vmnt = id->vmnt;
> -	nvm_id->cap = le32_to_cpu(id->cap);
> -	nvm_id->dom = le32_to_cpu(id->dom);
> -	memcpy(&nvm_id->ppaf, &id->ppaf,
> -					sizeof(struct nvm_addr_format));
> -
> -	return init_grp(nvm_id, id);
> +	dst->ch_len = src->grp_len;
> +	dst->lun_len = src->pu_len;
> +	dst->chk_len = src->chk_len;
> +	dst->sec_len = src->lba_len;
> +
> +	dst->sec_offset = 0;
> +	dst->chk_offset = dst->sec_len;
> +	dst->lun_offset = dst->chk_offset + dst->chk_len;
> +	dst->ch_offset = dst->lun_offset + dst->lun_len;
> +
> +	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
> +	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
> +	dst->chk_mask = ((1ULL << dst->chk_len) - 1) << dst->chk_offset;
> +	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
>   }
>   
> -static int nvme_nvm_setup_20(struct nvm_dev *nvmdev, struct nvm_id *nvm_id,
> -		struct nvme_nvm_id20 *id)
> +static int nvme_nvm_setup_20(struct nvme_nvm_id *gen_id,
> +			     struct nvm_dev_geo *dev_geo)
>   {
> -	nvm_id->ver_id = id->mjr;
> +	struct nvme_nvm_id20 *id = (struct nvme_nvm_id20 *)gen_id;
>   
> -	nvm_id->num_ch = le16_to_cpu(id->num_grp);
> -	nvm_id->num_lun = le16_to_cpu(id->num_pu);
> -	nvm_id->num_chk = le32_to_cpu(id->num_chk);
> -	nvm_id->clba = le32_to_cpu(id->clba);
> +	dev_geo->major_ver_id = id->mjr;
> +	dev_geo->minor_ver_id = id->mnr;
>   
> -	nvm_id->ws_min = le32_to_cpu(id->ws_min);
> -	nvm_id->ws_opt = le32_to_cpu(id->ws_opt);
> -	nvm_id->mw_cunits = le32_to_cpu(id->mw_cunits);
> +	/* Set compacted version for upper layers */
> +	dev_geo->c.version = NVM_OCSSD_SPEC_20;
>   
> -	nvm_id->trdt = le32_to_cpu(id->trdt);
> -	nvm_id->trdm = le32_to_cpu(id->trdm);
> -	nvm_id->tprt = le32_to_cpu(id->twrt);
> -	nvm_id->tprm = le32_to_cpu(id->twrm);
> -	nvm_id->tbet = le32_to_cpu(id->tcrst);
> -	nvm_id->tbem = le32_to_cpu(id->tcrsm);
> +	if (!(dev_geo->major_ver_id == 2 && dev_geo->minor_ver_id == 0)) {
> +		pr_err("nvm: OCSSD version not supported (v%d.%d)\n",
> +				dev_geo->major_ver_id, dev_geo->minor_ver_id);
> +		return -EINVAL;
> +	}
>   
> -	/* calculated values */
> -	nvm_id->ws_per_chk = nvm_id->clba / nvm_id->ws_min;
> +	dev_geo->num_ch = le16_to_cpu(id->num_grp);
> +	dev_geo->num_lun = le16_to_cpu(id->num_pu);
> +	dev_geo->all_luns = dev_geo->num_ch * dev_geo->num_lun;
>   
> -	/* 1.2 compatibility */
> -	nvm_id->ws_seq = NVM_IO_SNGL_ACCESS;
> +	dev_geo->c.num_chk = le32_to_cpu(id->num_chk);
> +	dev_geo->c.clba = le32_to_cpu(id->clba);
> +	dev_geo->c.csecs = -1;		/* Set by nvme identify */
> +	dev_geo->c.sos = -1;		/* Set bu nvme identify */
> +
> +	dev_geo->c.ws_min = le32_to_cpu(id->ws_min);
> +	dev_geo->c.ws_opt = le32_to_cpu(id->ws_opt);
> +	dev_geo->c.mw_cunits = le32_to_cpu(id->mw_cunits);
> +	dev_geo->c.maxoc = le32_to_cpu(id->maxoc);
> +	dev_geo->c.maxocpu = le32_to_cpu(id->maxocpu);
> +
> +	dev_geo->c.mccap = le32_to_cpu(id->mccap);
> +
> +	dev_geo->c.trdt = le32_to_cpu(id->trdt);
> +	dev_geo->c.trdm = le32_to_cpu(id->trdm);
> +	dev_geo->c.tprt = le32_to_cpu(id->twrt);
> +	dev_geo->c.tprm = le32_to_cpu(id->twrm);
> +	dev_geo->c.tbet = le32_to_cpu(id->tcrst);
> +	dev_geo->c.tbem = le32_to_cpu(id->tcrsm);
> +
> +	nvme_nvm_set_addr_20(&dev_geo->c.addrf, &id->lbaf);
>   
>   	return 0;
>   }
>   
> -static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id)
> +static int nvme_nvm_identity(struct nvm_dev *nvmdev)
>   {
>   	struct nvme_ns *ns = nvmdev->q->queuedata;
> -	struct nvme_nvm_id12 *id;
> +	struct nvme_nvm_id *nvme_nvm_id;
>   	struct nvme_nvm_command c = {};
>   	int ret;
>   
>   	c.identity.opcode = nvme_nvm_admin_identity;
>   	c.identity.nsid = cpu_to_le32(ns->head->ns_id);
>   
> -	id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL);
> -	if (!id)
> +	nvme_nvm_id = kmalloc(sizeof(struct nvme_nvm_id), GFP_KERNEL);
> +	if (!nvme_nvm_id)
>   		return -ENOMEM;
>   
>   	ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
> -				id, sizeof(struct nvme_nvm_id12));
> +				nvme_nvm_id, sizeof(struct nvme_nvm_id));
>   	if (ret) {
>   		ret = -EIO;
>   		goto out;
> @@ -378,22 +458,21 @@ static int nvme_nvm_identity(struct nvm_dev *nvmdev, struct nvm_id *nvm_id)
>   	 * The 1.2 and 2.0 specifications share the first byte in their geometry
>   	 * command to make it possible to know what version a device implements.
>   	 */
> -	switch (id->ver_id) {
> +	switch (nvme_nvm_id->ver_id) {
>   	case 1:
> -		ret = nvme_nvm_setup_12(nvmdev, nvm_id, id);
> +		ret = nvme_nvm_setup_12(nvme_nvm_id, &nvmdev->dev_geo);
>   		break;
>   	case 2:
> -		ret = nvme_nvm_setup_20(nvmdev, nvm_id,
> -				(struct nvme_nvm_id20 *)id);
> +		ret = nvme_nvm_setup_20(nvme_nvm_id, &nvmdev->dev_geo);
>   		break;
>   	default:
> -		dev_err(ns->ctrl->device,
> -			"OCSSD revision not supported (%d)\n",
> -			nvm_id->ver_id);
> +		dev_err(ns->ctrl->device, "OCSSD revision not supported (%d)\n",
> +							nvme_nvm_id->ver_id);
>   		ret = -EINVAL;
>   	}
> +
>   out:
> -	kfree(id);
> +	kfree(nvme_nvm_id);
>   	return ret;
>   }
>   
> @@ -401,12 +480,12 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
>   								u8 *blks)
>   {
>   	struct request_queue *q = nvmdev->q;
> -	struct nvm_geo *geo = &nvmdev->geo;
> +	struct nvm_dev_geo *dev_geo = &nvmdev->dev_geo;
>   	struct nvme_ns *ns = q->queuedata;
>   	struct nvme_ctrl *ctrl = ns->ctrl;
>   	struct nvme_nvm_command c = {};
>   	struct nvme_nvm_bb_tbl *bb_tbl;
> -	int nr_blks = geo->nr_chks * geo->plane_mode;
> +	int nr_blks = dev_geo->c.num_chk * dev_geo->c.num_pln;
>   	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
>   	int ret = 0;
>   
> @@ -447,7 +526,7 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
>   		goto out;
>   	}
>   
> -	memcpy(blks, bb_tbl->blk, geo->nr_chks * geo->plane_mode);
> +	memcpy(blks, bb_tbl->blk, dev_geo->c.num_chk * dev_geo->c.num_pln);
>   out:
>   	kfree(bb_tbl);
>   	return ret;
> @@ -817,9 +896,10 @@ int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg)
>   void nvme_nvm_update_nvm_info(struct nvme_ns *ns)
>   {
>   	struct nvm_dev *ndev = ns->ndev;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
>   
> -	ndev->identity.csecs = ndev->geo.sec_size = 1 << ns->lba_shift;
> -	ndev->identity.sos = ndev->geo.oob_size = ns->ms;
> +	dev_geo->c.csecs = 1 << ns->lba_shift;
> +	dev_geo->c.sos = ns->ms;
>   }
>   
>   int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
> @@ -852,23 +932,24 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
>   {
>   	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
>   	struct nvm_dev *ndev = ns->ndev;
> -	struct nvm_id *id;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
>   	struct attribute *attr;
>   
>   	if (!ndev)
>   		return 0;
>   
> -	id = &ndev->identity;
>   	attr = &dattr->attr;
>   
>   	if (strcmp(attr->name, "version") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->ver_id);
> +		return scnprintf(page, PAGE_SIZE, "%u.%u\n",
> +						dev_geo->major_ver_id,
> +						dev_geo->minor_ver_id);
>   	} else if (strcmp(attr->name, "capabilities") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->cap);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.cap);
>   	} else if (strcmp(attr->name, "read_typ") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->trdt);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.trdt);
>   	} else if (strcmp(attr->name, "read_max") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->trdm);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.trdm);
>   	} else {
>   		return scnprintf(page,
>   				 PAGE_SIZE,
> @@ -877,76 +958,80 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
>   	}
>   }
>   
> +static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addr_format_12 *ppaf,
> +					 char *page)
> +{
> +	return scnprintf(page, PAGE_SIZE,
> +		"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
> +				ppaf->ch_offset, ppaf->ch_len,
> +				ppaf->lun_offset, ppaf->lun_len,
> +				ppaf->pln_offset, ppaf->pln_len,
> +				ppaf->blk_offset, ppaf->blk_len,
> +				ppaf->pg_offset, ppaf->pg_len,
> +				ppaf->sec_offset, ppaf->sec_len);
> +}
> +
>   static ssize_t nvm_dev_attr_show_12(struct device *dev,
>   		struct device_attribute *dattr, char *page)
>   {
>   	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
>   	struct nvm_dev *ndev = ns->ndev;
> -	struct nvm_id *id;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
>   	struct attribute *attr;
>   
>   	if (!ndev)
>   		return 0;
>   
> -	id = &ndev->identity;
>   	attr = &dattr->attr;
>   
>   	if (strcmp(attr->name, "vendor_opcode") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->vmnt);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.vmnt);
>   	} else if (strcmp(attr->name, "device_mode") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->dom);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.dom);
>   	/* kept for compatibility */
>   	} else if (strcmp(attr->name, "media_manager") == 0) {
>   		return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
>   	} else if (strcmp(attr->name, "ppa_format") == 0) {
> -		return scnprintf(page, PAGE_SIZE,
> -			"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
> -			id->ppaf.ch_offset, id->ppaf.ch_len,
> -			id->ppaf.lun_offset, id->ppaf.lun_len,
> -			id->ppaf.pln_offset, id->ppaf.pln_len,
> -			id->ppaf.blk_offset, id->ppaf.blk_len,
> -			id->ppaf.pg_offset, id->ppaf.pg_len,
> -			id->ppaf.sect_offset, id->ppaf.sect_len);
> +		return nvm_dev_attr_show_ppaf((void *)&dev_geo->c.addrf, page);
>   	} else if (strcmp(attr->name, "media_type") == 0) {	/* u8 */
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->mtype);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mtype);
>   	} else if (strcmp(attr->name, "flash_media_type") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->fmtype);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.fmtype);
>   	} else if (strcmp(attr->name, "num_channels") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_ch);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_ch);
>   	} else if (strcmp(attr->name, "num_luns") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_lun);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_lun);
>   	} else if (strcmp(attr->name, "num_planes") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_pln);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.num_pln);
>   	} else if (strcmp(attr->name, "num_blocks") == 0) {	/* u16 */
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_chk);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.num_chk);
>   	} else if (strcmp(attr->name, "num_pages") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_pg);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.num_pg);
>   	} else if (strcmp(attr->name, "page_size") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->fpg_sz);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.fpg_sz);
>   	} else if (strcmp(attr->name, "hw_sector_size") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->csecs);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.csecs);
>   	} else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->sos);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.sos);
>   	} else if (strcmp(attr->name, "prog_typ") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tprt);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprt);
>   	} else if (strcmp(attr->name, "prog_max") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tprm);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprm);
>   	} else if (strcmp(attr->name, "erase_typ") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tbet);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbet);
>   	} else if (strcmp(attr->name, "erase_max") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tbem);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbem);
>   	} else if (strcmp(attr->name, "multiplane_modes") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "0x%08x\n", id->mpos);
> +		return scnprintf(page, PAGE_SIZE, "0x%08x\n", dev_geo->c.mpos);
>   	} else if (strcmp(attr->name, "media_capabilities") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "0x%08x\n", id->mccap);
> +		return scnprintf(page, PAGE_SIZE, "0x%08x\n", dev_geo->c.mccap);
>   	} else if (strcmp(attr->name, "max_phys_secs") == 0) {
>   		return scnprintf(page, PAGE_SIZE, "%u\n",
>   				ndev->ops->max_phys_sect);
>   	} else {
> -		return scnprintf(page,
> -				 PAGE_SIZE,
> -				 "Unhandled attr(%s) in `nvm_dev_attr_show_12`\n",
> -				 attr->name);
> +		return scnprintf(page, PAGE_SIZE,
> +			"Unhandled attr(%s) in `nvm_dev_attr_show_12`\n",
> +			attr->name);
>   	}
>   }
>   
> @@ -955,42 +1040,40 @@ static ssize_t nvm_dev_attr_show_20(struct device *dev,
>   {
>   	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
>   	struct nvm_dev *ndev = ns->ndev;
> -	struct nvm_id *id;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
>   	struct attribute *attr;
>   
>   	if (!ndev)
>   		return 0;
>   
> -	id = &ndev->identity;
>   	attr = &dattr->attr;
>   
>   	if (strcmp(attr->name, "groups") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_ch);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_ch);
>   	} else if (strcmp(attr->name, "punits") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_lun);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_lun);
>   	} else if (strcmp(attr->name, "chunks") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->num_chk);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.num_chk);
>   	} else if (strcmp(attr->name, "clba") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->clba);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.clba);
>   	} else if (strcmp(attr->name, "ws_min") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->ws_min);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_min);
>   	} else if (strcmp(attr->name, "ws_opt") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->ws_opt);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_opt);
>   	} else if (strcmp(attr->name, "mw_cunits") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->mw_cunits);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mw_cunits);
>   	} else if (strcmp(attr->name, "write_typ") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tprt);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprt);
>   	} else if (strcmp(attr->name, "write_max") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tprm);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprm);
>   	} else if (strcmp(attr->name, "reset_typ") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tbet);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbet);
>   	} else if (strcmp(attr->name, "reset_max") == 0) {
> -		return scnprintf(page, PAGE_SIZE, "%u\n", id->tbem);
> +		return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbem);
>   	} else {
> -		return scnprintf(page,
> -				 PAGE_SIZE,
> -				 "Unhandled attr(%s) in `nvm_dev_attr_show_20`\n",
> -				 attr->name);
> +		return scnprintf(page, PAGE_SIZE,
> +			"Unhandled attr(%s) in `nvm_dev_attr_show_20`\n",
> +			attr->name);
>   	}
>   }
>   
> @@ -1109,10 +1192,13 @@ static const struct attribute_group nvm_dev_attr_group_20 = {
>   
>   int nvme_nvm_register_sysfs(struct nvme_ns *ns)
>   {
> -	if (!ns->ndev)
> +	struct nvm_dev *ndev = ns->ndev;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
> +
> +	if (!ndev)
>   		return -EINVAL;
>   
> -	switch (ns->ndev->identity.ver_id) {
> +	switch (dev_geo->major_ver_id) {
>   	case 1:
>   		return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
>   					&nvm_dev_attr_group_12);
> @@ -1126,7 +1212,10 @@ int nvme_nvm_register_sysfs(struct nvme_ns *ns)
>   
>   void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
>   {
> -	switch (ns->ndev->identity.ver_id) {
> +	struct nvm_dev *ndev = ns->ndev;
> +	struct nvm_dev_geo *dev_geo = &ndev->dev_geo;
> +
> +	switch (dev_geo->major_ver_id) {
>   	case 1:
>   		sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
>   					&nvm_dev_attr_group_12);
> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
> index b717c000b712..6a567bd19b73 100644
> --- a/include/linux/lightnvm.h
> +++ b/include/linux/lightnvm.h
> @@ -23,6 +23,11 @@ enum {
>   #define NVM_LUN_BITS (8)
>   #define NVM_CH_BITS  (7)
>   
> +enum {
> +	NVM_OCSSD_SPEC_12 = 12,
> +	NVM_OCSSD_SPEC_20 = 20,
> +};
> +
>   struct ppa_addr {
>   	/* Generic structure for all addresses */
>   	union {
> @@ -50,7 +55,7 @@ struct nvm_id;
>   struct nvm_dev;
>   struct nvm_tgt_dev;
>   
> -typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
> +typedef int (nvm_id_fn)(struct nvm_dev *);
>   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 *);
> @@ -154,62 +159,113 @@ struct nvm_id_lp_tbl {
>   	struct nvm_id_lp_mlc mlc;
>   };
>   
> -struct nvm_addr_format {
> -	u8	ch_offset;
> +struct nvm_addr_format_12 {
>   	u8	ch_len;
> -	u8	lun_offset;
>   	u8	lun_len;
> -	u8	pln_offset;
> +	u8	blk_len;
> +	u8	pg_len;
>   	u8	pln_len;
> +	u8	sec_len;
> +
> +	u8	ch_offset;
> +	u8	lun_offset;
>   	u8	blk_offset;
> -	u8	blk_len;
>   	u8	pg_offset;
> -	u8	pg_len;
> -	u8	sect_offset;
> -	u8	sect_len;
> +	u8	pln_offset;
> +	u8	sec_offset;
> +
> +	u64	ch_mask;
> +	u64	lun_mask;
> +	u64	blk_mask;
> +	u64	pg_mask;
> +	u64	pln_mask;
> +	u64	sec_mask;
> +};
> +
> +struct nvm_addr_format {
> +	u8	ch_len;
> +	u8	lun_len;
> +	u8	chk_len;
> +	u8	sec_len;
> +	u8	rsv_len[2];
> +
> +	u8	ch_offset;
> +	u8	lun_offset;
> +	u8	chk_offset;
> +	u8	sec_offset;
> +	u8	rsv_off[2];
> +
> +	u64	ch_mask;
> +	u64	lun_mask;
> +	u64	chk_mask;
> +	u64	sec_mask;
> +	u64	rsv_mask[2];
>   };
>   
> -struct nvm_id {
> -	u8	ver_id;
> +/* Device common geometry */
> +struct nvm_common_geo {
> +	/* kernel short version */
> +	u8	version;
> +
> +	/* chunk geometry */
> +	u32	num_chk;	/* chunks per lun */
> +	u32	clba;		/* sectors per chunk */
> +	u16	csecs;		/* sector size */
> +	u16	sos;		/* out-of-band area size */
> +
> +	/* device write constrains */
> +	u32	ws_min;		/* minimum write size */
> +	u32	ws_opt;		/* optimal write size */
> +	u32	mw_cunits;	/* distance required for successful read */
> +	u32	maxoc;		/* maximum open chunks */
> +	u32	maxocpu;	/* maximum open chunks per parallel unit */
> +
> +	/* device capabilities */
> +	u32	mccap;
> +
> +	/* device timings */
> +	u32	trdt;		/* Avg. Tread (ns) */
> +	u32	trdm;		/* Max Tread (ns) */
> +	u32	tprt;		/* Avg. Tprog (ns) */
> +	u32	tprm;		/* Max Tprog (ns) */
> +	u32	tbet;		/* Avg. Terase (ns) */
> +	u32	tbem;		/* Max Terase (ns) */
> +
> +	/* generic address format */
> +	struct nvm_addr_format addrf;
> +
> +	/* 1.2 compatibility */
>   	u8	vmnt;
>   	u32	cap;
>   	u32	dom;
>   
> -	struct	nvm_addr_format ppaf;
> -
> -	u8	num_ch;
> -	u8	num_lun;
> -	u16	num_chk;
> -	u16	clba;
> -	u16	csecs;
> -	u16	sos;
> -
> -	u32	ws_min;
> -	u32	ws_opt;
> -	u32	mw_cunits;
> -
> -	u32	trdt;
> -	u32	trdm;
> -	u32	tprt;
> -	u32	tprm;
> -	u32	tbet;
> -	u32	tbem;
> -	u32	mpos;
> -	u32	mccap;
> -	u16	cpar;
> -
> -	/* calculated values */
> -	u16	ws_seq;
> -	u16	ws_per_chk;
> -
> -	/* 1.2 compatibility */
>   	u8	mtype;
>   	u8	fmtype;
>   
> +	u16	cpar;
> +	u32	mpos;
> +
>   	u8	num_pln;
> +	u8	pln_mode;
>   	u16	num_pg;
>   	u16	fpg_sz;
> -} __packed;
> +};
> +
> +/* Device identified geometry */
> +struct nvm_dev_geo {
> +	/* device reported version */
> +	u8	major_ver_id;
> +	u8	minor_ver_id;
> +
> +	/* full device geometry */
> +	u16	num_ch;
> +	u16	num_lun;
> +
> +	/* calculated values */
> +	u16	all_luns;
> +
> +	struct nvm_common_geo c;
> +};
>   
>   struct nvm_target {
>   	struct list_head list;
> @@ -274,38 +330,23 @@ enum {
>   	NVM_BLK_ST_BAD =	0x8,	/* Bad block */
>   };
>   
> -
> -/* Device generic information */
> +/* Instance geometry */
>   struct nvm_geo {
> -	/* generic geometry */
> -	int nr_chnls;
> -	int all_luns; /* across channels */
> -	int nr_luns; /* per channel */
> -	int nr_chks; /* per lun */
> -
> -	int sec_size;
> -	int oob_size;
> -	int mccap;
> -
> -	int sec_per_chk;
> -	int sec_per_lun;
> -
> -	int ws_min;
> -	int ws_opt;
> -	int ws_seq;
> -	int ws_per_chk;
> +	/* instance specific geometry */
> +	int num_ch;
> +	int num_lun;		/* per channel */
>   
>   	int max_rq_size;
> -
>   	int op;
>   
> -	struct nvm_addr_format ppaf;
> +	/* common geometry */
> +	struct nvm_common_geo c;
>   
> -	/* Legacy 1.2 specific geometry */
> -	int plane_mode; /* drive device in single, double or quad mode */
> -	int nr_planes;
> -	int sec_per_pg; /* only sectors for a single page */
> -	int sec_per_pl; /* all sectors across planes */
> +	/* calculated values */
> +	int all_luns;		/* across channels */
> +	int all_chunks;		/* across channels */
> +
> +	sector_t total_secs;	/* across channels */
>   };
>   
>   /* sub-device structure */
> @@ -316,9 +357,6 @@ struct nvm_tgt_dev {
>   	/* Base ppas for target LUNs */
>   	struct ppa_addr *luns;
>   
> -	sector_t total_secs;
> -
> -	struct nvm_id identity;
>   	struct request_queue *q;
>   
>   	struct nvm_dev *parent;
> @@ -331,15 +369,11 @@ struct nvm_dev {
>   	struct list_head devices;
>   
>   	/* Device information */
> -	struct nvm_geo geo;
> -
> -	unsigned long total_secs;
> +	struct nvm_dev_geo dev_geo;
>   
>   	unsigned long *lun_map;
>   	void *dma_pool;
>   
> -	struct nvm_id identity;
> -
>   	/* Backend device */
>   	struct request_queue *q;
>   	char name[DISK_NAME_LEN];
> @@ -359,14 +393,16 @@ static inline struct ppa_addr generic_to_dev_addr(struct nvm_tgt_dev *tgt_dev,
>   						  struct ppa_addr r)
>   {
>   	struct nvm_geo *geo = &tgt_dev->geo;
> +	struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&geo->c.addrf;
>   	struct ppa_addr l;
>   
> -	l.ppa = ((u64)r.g.blk) << geo->ppaf.blk_offset;
> -	l.ppa |= ((u64)r.g.pg) << geo->ppaf.pg_offset;
> -	l.ppa |= ((u64)r.g.sec) << geo->ppaf.sect_offset;
> -	l.ppa |= ((u64)r.g.pl) << geo->ppaf.pln_offset;
> -	l.ppa |= ((u64)r.g.lun) << geo->ppaf.lun_offset;
> -	l.ppa |= ((u64)r.g.ch) << geo->ppaf.ch_offset;
> +	l.ppa = ((u64)r.g.ch) << ppaf->ch_offset;
> +	l.ppa |= ((u64)r.g.lun) << ppaf->lun_offset;
> +	l.ppa |= ((u64)r.g.blk) << ppaf->blk_offset;
> +	l.ppa |= ((u64)r.g.pg) << ppaf->pg_offset;
> +	l.ppa |= ((u64)r.g.pl) << ppaf->pln_offset;
> +	l.ppa |= ((u64)r.g.sec) << ppaf->sec_offset;
>   
>   	return l;
>   }
> @@ -375,24 +411,18 @@ static inline struct ppa_addr dev_to_generic_addr(struct nvm_tgt_dev *tgt_dev,
>   						  struct ppa_addr r)
>   {
>   	struct nvm_geo *geo = &tgt_dev->geo;
> +	struct nvm_addr_format_12 *ppaf =
> +				(struct nvm_addr_format_12 *)&geo->c.addrf;
>   	struct ppa_addr l;
>   
>   	l.ppa = 0;
> -	/*
> -	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
> -	 */
> -	l.g.blk = (r.ppa >> geo->ppaf.blk_offset) &
> -					(((1 << geo->ppaf.blk_len) - 1));
> -	l.g.pg |= (r.ppa >> geo->ppaf.pg_offset) &
> -					(((1 << geo->ppaf.pg_len) - 1));
> -	l.g.sec |= (r.ppa >> geo->ppaf.sect_offset) &
> -					(((1 << geo->ppaf.sect_len) - 1));
> -	l.g.pl |= (r.ppa >> geo->ppaf.pln_offset) &
> -					(((1 << geo->ppaf.pln_len) - 1));
> -	l.g.lun |= (r.ppa >> geo->ppaf.lun_offset) &
> -					(((1 << geo->ppaf.lun_len) - 1));
> -	l.g.ch |= (r.ppa >> geo->ppaf.ch_offset) &
> -					(((1 << geo->ppaf.ch_len) - 1));
> +
> +	l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset;
> +	l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset;
> +	l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset;
> +	l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset;
> +	l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset;
> +	l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset;
>   
>   	return l;
>   }
> 

This code looks like a lot of shuffling around for little gain.

Instead of going from the base assumption that is

base
     -> 1.2
     -> 2.0

go with

base 2.0
      -> 1.2

That simplifies where the code is going, and where it will be in the 
future. It is more complex to maintain the above, when new targets in 
the future most properly will only consider only 2.0 implementations.

The patch does a lot of things at the same time. E.g,.

1) Adding 1.2 version check in pblk_init.c. This should be a separate patch.
2) Introduces constants for spec versions.  This should be a separate patch.
3) Refactors nvm_geo into nvm_dev_geo. Keep it as nvm_geo and make pblk 
use that structure by default. It should not be necessary for pblk to 
know about the 1.2 data structures. For the special case get/set and 
addressing, it can use the 1.2 variables in the nvm_geo if necessary. We 
can also put it in lightnvm core, but it is properly not worth to do.
4) maxoc / maxocpu, I did not add them in the early patches, as there is 
no implementation that will use it. When it is implemented, it can be 
added. At least it should go into a separate patch.
5) the rename of ppaf -> addrf / ppaf_bitsize ->addrf_len should be in a 
separate patch.
6) rename sec_offset/sec_len -> go into a separate patch or keep as is.
7) addition of nvme_nvm_id data structure, I can see where you are going 
with this, but it does not have anything to with what the patch 
describes. It should go into a separate patch. However, I rather just 
have the original implementation for identifying 1.2/2.0.
8) If you want to remove the identify data structure in nvm_geo, make it 
in another patch.