[PATCH 00/13] lightnvm updates for 4.4-rc2

[PATCH 00/13] lightnvm updates for 4.4-rc2

[Matias Bjørling]

Hi Jens,

This is the patches targeted for -rc2 of 4.4.

Ten of the patches fix bugs and small specification updates. While the
last two are larger patches. They are necessary because of specification
changes. The updates are applied now before it is set in stone for 4.4
(or at least makes it a lot harder to change)

Patch 1: Adds the linux-block list to the maintainers list for LightNVM.
Patch 2: Fixes a ushort bug reported by Geert.
Patch 3: Updates the implementation to support the new bad block table
         format.
Patch 4-9: Small fixes.
Patch 10: The specification had support for both linear and device
          specific addressing. It was replaced by ppa format, that
          defines the device ppa format used by the specific device.
          This patch adds the support and removes the previous two
          modes.
Patch 11-12: Two small cleanups to the lightnvm nvme integration.
          Caused by specification changes.

Patches 3 to 12 is the first time they are posted to the list for
review.

Will you pick up the patches when convenient (and reviewed):

  git@github.com:OpenChannelSSD/linux.git for-jens

I'll update the for-jens branch and post a separate patch if any
fixes is applied to the patches.

Javier González (1):
  lightnvm: cleanup queue before target removal

Matias Bjørling (12):
  MAINTAINERS: Add linux-block list to LightNVM for patches
  lightnvm: change max_phys_sect to uint
  lightnvm: update bad block table format
  lightnvm: update alignments for identify command
  lightnvm: expose mccap in identify command
  lightnvm: remove unused attrs in nvm_id structs
  lightnvm: check for NAND flash and its type
  lightnvm: prematurely activate nvm_dev
  lightnvm: prevent double free on init error
  lightnvm: remove linear and device addr modes
  nvme: missing ppaf copy
  nvme: remove reserved double word

 MAINTAINERS                  |   1 +
 drivers/lightnvm/core.c      |  37 +++++-----
 drivers/lightnvm/gennvm.c    |  40 ++++++----
 drivers/lightnvm/gennvm.h    |   2 +
 drivers/lightnvm/rrpc.c      |  32 +++++++-
 drivers/nvme/host/lightnvm.c | 126 +++++++++++++++++++++++++-------
 include/linux/lightnvm.h     | 170 ++++++++++---------------------------------
 7 files changed, 219 insertions(+), 189 deletions(-)

-- 
2.1.4

[PATCH 00/13] lightnvm updates for 4.4-rc2

[Matias Bjørling]

Hi Jens,

This is the patches targeted for -rc2 of 4.4.

Ten of the patches fix bugs and small specification updates. While the
last two are larger patches. They are necessary because of specification
changes. The updates are applied now before it is set in stone for 4.4
(or at least makes it a lot harder to change)

Patch 1: Adds the linux-block list to the maintainers list for LightNVM.
Patch 2: Fixes a ushort bug reported by Geert.
Patch 3: Updates the implementation to support the new bad block table
         format.
Patch 4-9: Small fixes.
Patch 10: The specification had support for both linear and device
          specific addressing. It was replaced by ppa format, that
          defines the device ppa format used by the specific device.
          This patch adds the support and removes the previous two
          modes.
Patch 11-12: Two small cleanups to the lightnvm nvme integration.
          Caused by specification changes.

Patches 3 to 12 is the first time they are posted to the list for
review.

Will you pick up the patches when convenient (and reviewed):

  git at github.com:OpenChannelSSD/linux.git for-jens

I'll update the for-jens branch and post a separate patch if any
fixes is applied to the patches.

Javier Gonz?lez (1):
  lightnvm: cleanup queue before target removal

Matias Bj?rling (12):
  MAINTAINERS: Add linux-block list to LightNVM for patches
  lightnvm: change max_phys_sect to uint
  lightnvm: update bad block table format
  lightnvm: update alignments for identify command
  lightnvm: expose mccap in identify command
  lightnvm: remove unused attrs in nvm_id structs
  lightnvm: check for NAND flash and its type
  lightnvm: prematurely activate nvm_dev
  lightnvm: prevent double free on init error
  lightnvm: remove linear and device addr modes
  nvme: missing ppaf copy
  nvme: remove reserved double word

 MAINTAINERS                  |   1 +
 drivers/lightnvm/core.c      |  37 +++++-----
 drivers/lightnvm/gennvm.c    |  40 ++++++----
 drivers/lightnvm/gennvm.h    |   2 +
 drivers/lightnvm/rrpc.c      |  32 +++++++-
 drivers/nvme/host/lightnvm.c | 126 +++++++++++++++++++++++++-------
 include/linux/lightnvm.h     | 170 ++++++++++---------------------------------
 7 files changed, 219 insertions(+), 189 deletions(-)

-- 
2.1.4

[PATCH 01/13] MAINTAINERS: Add linux-block list to LightNVM for patches

[Matias Bjørling]

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index f56a10a..2c4ec7a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6337,6 +6337,7 @@ F:	arch/*/include/asm/pmem.h
 LIGHTNVM PLATFORM SUPPORT
 M:	Matias Bjorling <mb@lightnvm.io>
 W:	http://github/OpenChannelSSD
+L:	linux-block@vger.kernel.org
 S:	Maintained
 F:	drivers/lightnvm/
 F:	include/linux/lightnvm.h
-- 
2.1.4

[PATCH 01/13] MAINTAINERS: Add linux-block list to LightNVM for patches

[Matias Bjørling]

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index f56a10a..2c4ec7a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6337,6 +6337,7 @@ F:	arch/*/include/asm/pmem.h
 LIGHTNVM PLATFORM SUPPORT
 M:	Matias Bjorling <mb at lightnvm.io>
 W:	http://github/OpenChannelSSD
+L:	linux-block at vger.kernel.org
 S:	Maintained
 F:	drivers/lightnvm/
 F:	include/linux/lightnvm.h
-- 
2.1.4

[PATCH 02/13] lightnvm: change max_phys_sect to uint

[Matias Bjørling]

The max_phys_sect variable is defined as a char. We do a boundary check
to maximally allow 256 physical page descriptors per command. As we are
not indexing from zero. This expression is always false. Bump the
max_phys_sect to an unsigned int to support the range check.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 include/linux/lightnvm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 69c9057..32b5369 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -220,7 +220,7 @@ struct nvm_dev_ops {
 	nvm_dev_dma_alloc_fn	*dev_dma_alloc;
 	nvm_dev_dma_free_fn	*dev_dma_free;
 
-	uint8_t			max_phys_sect;
+	unsigned int		max_phys_sect;
 };
 
 struct nvm_lun {
-- 
2.1.4

[PATCH 02/13] lightnvm: change max_phys_sect to uint

[Matias Bjørling]

The max_phys_sect variable is defined as a char. We do a boundary check
to maximally allow 256 physical page descriptors per command. As we are
not indexing from zero. This expression is always false. Bump the
max_phys_sect to an unsigned int to support the range check.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
Reported-by: Geert Uytterhoeven <geert at linux-m68k.org>
---
 include/linux/lightnvm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 69c9057..32b5369 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -220,7 +220,7 @@ struct nvm_dev_ops {
 	nvm_dev_dma_alloc_fn	*dev_dma_alloc;
 	nvm_dev_dma_free_fn	*dev_dma_free;
 
-	uint8_t			max_phys_sect;
+	unsigned int		max_phys_sect;
 };
 
 struct nvm_lun {
-- 
2.1.4

[PATCH 03/13] lightnvm: update bad block table format

[Matias Bjørling]

The specification was changed to reflect a multi-value bad block table.
Instead of bit-based bad block table, the bad block table now allows
eight bad block categories. Currently four are defined:

 * Factory bad blocks
 * Grown bad blocks
 * Device-side reserved blocks
 * Host-side reserved blocks

The factory and grown bad blocks are the regular bad blocks. The
reserved blocks are either for internal use or external use. In
particular, the device-side reserved blocks allows the host to
bootstrap from a limited number of flash blocks. Reducing the flash
blocks to scan upon super block initialization.

Support for both get bad block table and set bad block table is added.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/gennvm.c    |  32 ++++++++----
 drivers/lightnvm/gennvm.h    |   2 +
 drivers/nvme/host/lightnvm.c | 113 ++++++++++++++++++++++++++++++++++---------
 include/linux/lightnvm.h     |   6 +--
 4 files changed, 117 insertions(+), 36 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index ae1fb2b..8cfc011 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -64,19 +64,22 @@ static int gennvm_luns_init(struct nvm_dev *dev, struct gen_nvm *gn)
 	return 0;
 }
 
-static int gennvm_block_bb(u32 lun_id, void *bb_bitmap, unsigned int nr_blocks,
+static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
 								void *private)
 {
 	struct gen_nvm *gn = private;
-	struct gen_lun *lun = &gn->luns[lun_id];
+	struct nvm_dev *dev = gn->dev;
+	struct gen_lun *lun;
 	struct nvm_block *blk;
 	int i;
 
-	if (unlikely(bitmap_empty(bb_bitmap, nr_blocks)))
-		return 0;
+	ppa = addr_to_generic_mode(gn->dev, ppa);
+	lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun];
+
+	for (i = 0; i < nr_blocks; i++) {
+		if (blks[i] == 0)
+			continue;
 
-	i = -1;
-	while ((i = find_next_bit(bb_bitmap, nr_blocks, i + 1)) < nr_blocks) {
 		blk = &lun->vlun.blocks[i];
 		if (!blk) {
 			pr_err("gennvm: BB data is out of bounds.\n");
@@ -171,8 +174,16 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
 		}
 
 		if (dev->ops->get_bb_tbl) {
-			ret = dev->ops->get_bb_tbl(dev->q, lun->vlun.id,
-					dev->blks_per_lun, gennvm_block_bb, gn);
+			struct ppa_addr ppa;
+
+			ppa.ppa = 0;
+			ppa.g.ch = lun->vlun.chnl_id;
+			ppa.g.lun = lun->vlun.id;
+			ppa = generic_to_addr_mode(dev, ppa);
+
+			ret = dev->ops->get_bb_tbl(dev->q, ppa,
+						dev->blks_per_lun,
+						gennvm_block_bb, gn);
 			if (ret)
 				pr_err("gennvm: could not read BB table\n");
 		}
@@ -199,6 +210,7 @@ static int gennvm_register(struct nvm_dev *dev)
 	if (!gn)
 		return -ENOMEM;
 
+	gn->dev = dev;
 	gn->nr_luns = dev->nr_luns;
 	dev->mp = gn;
 
@@ -354,10 +366,10 @@ static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
 {
 	int i;
 
-	if (!dev->ops->set_bb)
+	if (!dev->ops->set_bb_tbl)
 		return;
 
-	if (dev->ops->set_bb(dev->q, rqd, 1))
+	if (dev->ops->set_bb_tbl(dev->q, rqd, 1))
 		return;
 
 	gennvm_addr_to_generic_mode(dev, rqd);
diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h
index d23bd35..9c24b5b 100644
--- a/drivers/lightnvm/gennvm.h
+++ b/drivers/lightnvm/gennvm.h
@@ -35,6 +35,8 @@ struct gen_lun {
 };
 
 struct gen_nvm {
+	struct nvm_dev *dev;
+
 	int nr_luns;
 	struct gen_lun *luns;
 };
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index e0b7b95..2c35465 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -93,7 +93,7 @@ struct nvme_nvm_l2ptbl {
 	__le16			cdw14[6];
 };
 
-struct nvme_nvm_bbtbl {
+struct nvme_nvm_getbbtbl {
 	__u8			opcode;
 	__u8			flags;
 	__u16			command_id;
@@ -101,10 +101,23 @@ struct nvme_nvm_bbtbl {
 	__u64			rsvd[2];
 	__le64			prp1;
 	__le64			prp2;
-	__le32			prp1_len;
-	__le32			prp2_len;
-	__le32			lbb;
-	__u32			rsvd11[3];
+	__le64			spba;
+	__u32			rsvd4[4];
+};
+
+struct nvme_nvm_setbbtbl {
+	__u8			opcode;
+	__u8			flags;
+	__u16			command_id;
+	__le32			nsid;
+	__le64			rsvd[2];
+	__le64			prp1;
+	__le64			prp2;
+	__le64			spba;
+	__le16			nlb;
+	__u8			value;
+	__u8			rsvd3;
+	__u32			rsvd4[3];
 };
 
 struct nvme_nvm_erase_blk {
@@ -129,8 +142,8 @@ struct nvme_nvm_command {
 		struct nvme_nvm_hb_rw hb_rw;
 		struct nvme_nvm_ph_rw ph_rw;
 		struct nvme_nvm_l2ptbl l2p;
-		struct nvme_nvm_bbtbl get_bb;
-		struct nvme_nvm_bbtbl set_bb;
+		struct nvme_nvm_getbbtbl get_bb;
+		struct nvme_nvm_setbbtbl set_bb;
 		struct nvme_nvm_erase_blk erase;
 	};
 };
@@ -187,6 +200,20 @@ struct nvme_nvm_id {
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
+struct nvme_nvm_bb_tbl {
+	__u8	tblid[4];
+	__le16	verid;
+	__le16	revid;
+	__le32	rvsd1;
+	__le32	tblks;
+	__le32	tfact;
+	__le32	tgrown;
+	__le32	tdresv;
+	__le32	thresv;
+	__le32	rsvd2[8];
+	__u8	blk[0];
+};
+
 /*
  * Check we didn't inadvertently grow the command struct
  */
@@ -195,12 +222,14 @@ static inline void _nvme_nvm_check_size(void)
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_bbtbl) != 64);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_id_group) != 960);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_addr_format) != 128);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_id) != 4096);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 512);
 }
 
 static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
@@ -322,43 +351,80 @@ out:
 	return ret;
 }
 
-static int nvme_nvm_get_bb_tbl(struct request_queue *q, int lunid,
-				unsigned int nr_blocks,
-				nvm_bb_update_fn *update_bbtbl, void *priv)
+static int nvme_nvm_get_bb_tbl(struct request_queue *q, struct ppa_addr ppa,
+				int nr_blocks, nvm_bb_update_fn *update_bbtbl,
+				void *priv)
 {
 	struct nvme_ns *ns = q->queuedata;
 	struct nvme_dev *dev = ns->dev;
 	struct nvme_nvm_command c = {};
-	void *bb_bitmap;
-	u16 bb_bitmap_size;
+	struct nvme_nvm_bb_tbl *bb_tbl;
+	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blocks;
 	int ret = 0;
 
 	c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
 	c.get_bb.nsid = cpu_to_le32(ns->ns_id);
-	c.get_bb.lbb = cpu_to_le32(lunid);
-	bb_bitmap_size = ((nr_blocks >> 15) + 1) * PAGE_SIZE;
-	bb_bitmap = kmalloc(bb_bitmap_size, GFP_KERNEL);
-	if (!bb_bitmap)
+	c.get_bb.spba = cpu_to_le64(ppa.ppa);
+
+	bb_tbl = kzalloc(tblsz, GFP_KERNEL);
+	if (!bb_tbl)
 		return -ENOMEM;
 
-	bitmap_zero(bb_bitmap, nr_blocks);
-
-	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_bitmap,
-								bb_bitmap_size);
+	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_tbl, tblsz);
 	if (ret) {
 		dev_err(dev->dev, "get bad block table failed (%d)\n", ret);
 		ret = -EIO;
 		goto out;
 	}
 
-	ret = update_bbtbl(lunid, bb_bitmap, nr_blocks, priv);
+	if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
+		bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
+		dev_err(dev->dev, "bbt format mismatch\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (le16_to_cpu(bb_tbl->verid) != 1) {
+		ret = -EINVAL;
+		dev_err(dev->dev, "bbt version not supported\n");
+		goto out;
+	}
+
+	if (le32_to_cpu(bb_tbl->tblks) != nr_blocks) {
+		ret = -EINVAL;
+		dev_err(dev->dev, "bbt unsuspected blocks returned (%u!=%u)",
+					le32_to_cpu(bb_tbl->tblks), nr_blocks);
+		goto out;
+	}
+
+	ret = update_bbtbl(ppa, nr_blocks, bb_tbl->blk, priv);
 	if (ret) {
 		ret = -EINTR;
 		goto out;
 	}
 
 out:
-	kfree(bb_bitmap);
+	kfree(bb_tbl);
+	return ret;
+}
+
+static int nvme_nvm_set_bb_tbl(struct request_queue *q, struct nvm_rq *rqd,
+								int type)
+{
+	struct nvme_ns *ns = q->queuedata;
+	struct nvme_dev *dev = ns->dev;
+	struct nvme_nvm_command c = {};
+	int ret = 0;
+
+	c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
+	c.set_bb.nsid = cpu_to_le32(ns->ns_id);
+	c.set_bb.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+	c.set_bb.nlb = cpu_to_le16(rqd->nr_pages - 1);
+	c.set_bb.value = type;
+
+	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
+	if (ret)
+		dev_err(dev->dev, "set bad block table failed (%d)\n", ret);
 	return ret;
 }
 
@@ -474,6 +540,7 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
 	.get_l2p_tbl		= nvme_nvm_get_l2p_tbl,
 
 	.get_bb_tbl		= nvme_nvm_get_bb_tbl,
+	.set_bb_tbl		= nvme_nvm_set_bb_tbl,
 
 	.submit_io		= nvme_nvm_submit_io,
 	.erase_block		= nvme_nvm_erase_block,
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 32b5369..9b3dc1b 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -191,11 +191,11 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
 struct nvm_block;
 
 typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
-typedef int (nvm_bb_update_fn)(u32, void *, unsigned int, void *);
+typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 *, void *);
 typedef int (nvm_id_fn)(struct request_queue *, struct nvm_id *);
 typedef int (nvm_get_l2p_tbl_fn)(struct request_queue *, u64, u32,
 				nvm_l2p_update_fn *, void *);
-typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, int, unsigned int,
+typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, struct ppa_addr, int,
 				nvm_bb_update_fn *, void *);
 typedef int (nvm_op_set_bb_fn)(struct request_queue *, struct nvm_rq *, int);
 typedef int (nvm_submit_io_fn)(struct request_queue *, struct nvm_rq *);
@@ -210,7 +210,7 @@ struct nvm_dev_ops {
 	nvm_id_fn		*identity;
 	nvm_get_l2p_tbl_fn	*get_l2p_tbl;
 	nvm_op_bb_tbl_fn	*get_bb_tbl;
-	nvm_op_set_bb_fn	*set_bb;
+	nvm_op_set_bb_fn	*set_bb_tbl;
 
 	nvm_submit_io_fn	*submit_io;
 	nvm_erase_blk_fn	*erase_block;
-- 
2.1.4

[PATCH 03/13] lightnvm: update bad block table format

[Matias Bjørling]

The specification was changed to reflect a multi-value bad block table.
Instead of bit-based bad block table, the bad block table now allows
eight bad block categories. Currently four are defined:

 * Factory bad blocks
 * Grown bad blocks
 * Device-side reserved blocks
 * Host-side reserved blocks

The factory and grown bad blocks are the regular bad blocks. The
reserved blocks are either for internal use or external use. In
particular, the device-side reserved blocks allows the host to
bootstrap from a limited number of flash blocks. Reducing the flash
blocks to scan upon super block initialization.

Support for both get bad block table and set bad block table is added.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/gennvm.c    |  32 ++++++++----
 drivers/lightnvm/gennvm.h    |   2 +
 drivers/nvme/host/lightnvm.c | 113 ++++++++++++++++++++++++++++++++++---------
 include/linux/lightnvm.h     |   6 +--
 4 files changed, 117 insertions(+), 36 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index ae1fb2b..8cfc011 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -64,19 +64,22 @@ static int gennvm_luns_init(struct nvm_dev *dev, struct gen_nvm *gn)
 	return 0;
 }
 
-static int gennvm_block_bb(u32 lun_id, void *bb_bitmap, unsigned int nr_blocks,
+static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
 								void *private)
 {
 	struct gen_nvm *gn = private;
-	struct gen_lun *lun = &gn->luns[lun_id];
+	struct nvm_dev *dev = gn->dev;
+	struct gen_lun *lun;
 	struct nvm_block *blk;
 	int i;
 
-	if (unlikely(bitmap_empty(bb_bitmap, nr_blocks)))
-		return 0;
+	ppa = addr_to_generic_mode(gn->dev, ppa);
+	lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun];
+
+	for (i = 0; i < nr_blocks; i++) {
+		if (blks[i] == 0)
+			continue;
 
-	i = -1;
-	while ((i = find_next_bit(bb_bitmap, nr_blocks, i + 1)) < nr_blocks) {
 		blk = &lun->vlun.blocks[i];
 		if (!blk) {
 			pr_err("gennvm: BB data is out of bounds.\n");
@@ -171,8 +174,16 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
 		}
 
 		if (dev->ops->get_bb_tbl) {
-			ret = dev->ops->get_bb_tbl(dev->q, lun->vlun.id,
-					dev->blks_per_lun, gennvm_block_bb, gn);
+			struct ppa_addr ppa;
+
+			ppa.ppa = 0;
+			ppa.g.ch = lun->vlun.chnl_id;
+			ppa.g.lun = lun->vlun.id;
+			ppa = generic_to_addr_mode(dev, ppa);
+
+			ret = dev->ops->get_bb_tbl(dev->q, ppa,
+						dev->blks_per_lun,
+						gennvm_block_bb, gn);
 			if (ret)
 				pr_err("gennvm: could not read BB table\n");
 		}
@@ -199,6 +210,7 @@ static int gennvm_register(struct nvm_dev *dev)
 	if (!gn)
 		return -ENOMEM;
 
+	gn->dev = dev;
 	gn->nr_luns = dev->nr_luns;
 	dev->mp = gn;
 
@@ -354,10 +366,10 @@ static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
 {
 	int i;
 
-	if (!dev->ops->set_bb)
+	if (!dev->ops->set_bb_tbl)
 		return;
 
-	if (dev->ops->set_bb(dev->q, rqd, 1))
+	if (dev->ops->set_bb_tbl(dev->q, rqd, 1))
 		return;
 
 	gennvm_addr_to_generic_mode(dev, rqd);
diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h
index d23bd35..9c24b5b 100644
--- a/drivers/lightnvm/gennvm.h
+++ b/drivers/lightnvm/gennvm.h
@@ -35,6 +35,8 @@ struct gen_lun {
 };
 
 struct gen_nvm {
+	struct nvm_dev *dev;
+
 	int nr_luns;
 	struct gen_lun *luns;
 };
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index e0b7b95..2c35465 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -93,7 +93,7 @@ struct nvme_nvm_l2ptbl {
 	__le16			cdw14[6];
 };
 
-struct nvme_nvm_bbtbl {
+struct nvme_nvm_getbbtbl {
 	__u8			opcode;
 	__u8			flags;
 	__u16			command_id;
@@ -101,10 +101,23 @@ struct nvme_nvm_bbtbl {
 	__u64			rsvd[2];
 	__le64			prp1;
 	__le64			prp2;
-	__le32			prp1_len;
-	__le32			prp2_len;
-	__le32			lbb;
-	__u32			rsvd11[3];
+	__le64			spba;
+	__u32			rsvd4[4];
+};
+
+struct nvme_nvm_setbbtbl {
+	__u8			opcode;
+	__u8			flags;
+	__u16			command_id;
+	__le32			nsid;
+	__le64			rsvd[2];
+	__le64			prp1;
+	__le64			prp2;
+	__le64			spba;
+	__le16			nlb;
+	__u8			value;
+	__u8			rsvd3;
+	__u32			rsvd4[3];
 };
 
 struct nvme_nvm_erase_blk {
@@ -129,8 +142,8 @@ struct nvme_nvm_command {
 		struct nvme_nvm_hb_rw hb_rw;
 		struct nvme_nvm_ph_rw ph_rw;
 		struct nvme_nvm_l2ptbl l2p;
-		struct nvme_nvm_bbtbl get_bb;
-		struct nvme_nvm_bbtbl set_bb;
+		struct nvme_nvm_getbbtbl get_bb;
+		struct nvme_nvm_setbbtbl set_bb;
 		struct nvme_nvm_erase_blk erase;
 	};
 };
@@ -187,6 +200,20 @@ struct nvme_nvm_id {
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
+struct nvme_nvm_bb_tbl {
+	__u8	tblid[4];
+	__le16	verid;
+	__le16	revid;
+	__le32	rvsd1;
+	__le32	tblks;
+	__le32	tfact;
+	__le32	tgrown;
+	__le32	tdresv;
+	__le32	thresv;
+	__le32	rsvd2[8];
+	__u8	blk[0];
+};
+
 /*
  * Check we didn't inadvertently grow the command struct
  */
@@ -195,12 +222,14 @@ static inline void _nvme_nvm_check_size(void)
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_bbtbl) != 64);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_id_group) != 960);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_addr_format) != 128);
 	BUILD_BUG_ON(sizeof(struct nvme_nvm_id) != 4096);
+	BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 512);
 }
 
 static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
@@ -322,43 +351,80 @@ out:
 	return ret;
 }
 
-static int nvme_nvm_get_bb_tbl(struct request_queue *q, int lunid,
-				unsigned int nr_blocks,
-				nvm_bb_update_fn *update_bbtbl, void *priv)
+static int nvme_nvm_get_bb_tbl(struct request_queue *q, struct ppa_addr ppa,
+				int nr_blocks, nvm_bb_update_fn *update_bbtbl,
+				void *priv)
 {
 	struct nvme_ns *ns = q->queuedata;
 	struct nvme_dev *dev = ns->dev;
 	struct nvme_nvm_command c = {};
-	void *bb_bitmap;
-	u16 bb_bitmap_size;
+	struct nvme_nvm_bb_tbl *bb_tbl;
+	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blocks;
 	int ret = 0;
 
 	c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
 	c.get_bb.nsid = cpu_to_le32(ns->ns_id);
-	c.get_bb.lbb = cpu_to_le32(lunid);
-	bb_bitmap_size = ((nr_blocks >> 15) + 1) * PAGE_SIZE;
-	bb_bitmap = kmalloc(bb_bitmap_size, GFP_KERNEL);
-	if (!bb_bitmap)
+	c.get_bb.spba = cpu_to_le64(ppa.ppa);
+
+	bb_tbl = kzalloc(tblsz, GFP_KERNEL);
+	if (!bb_tbl)
 		return -ENOMEM;
 
-	bitmap_zero(bb_bitmap, nr_blocks);
-
-	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_bitmap,
-								bb_bitmap_size);
+	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_tbl, tblsz);
 	if (ret) {
 		dev_err(dev->dev, "get bad block table failed (%d)\n", ret);
 		ret = -EIO;
 		goto out;
 	}
 
-	ret = update_bbtbl(lunid, bb_bitmap, nr_blocks, priv);
+	if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
+		bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
+		dev_err(dev->dev, "bbt format mismatch\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (le16_to_cpu(bb_tbl->verid) != 1) {
+		ret = -EINVAL;
+		dev_err(dev->dev, "bbt version not supported\n");
+		goto out;
+	}
+
+	if (le32_to_cpu(bb_tbl->tblks) != nr_blocks) {
+		ret = -EINVAL;
+		dev_err(dev->dev, "bbt unsuspected blocks returned (%u!=%u)",
+					le32_to_cpu(bb_tbl->tblks), nr_blocks);
+		goto out;
+	}
+
+	ret = update_bbtbl(ppa, nr_blocks, bb_tbl->blk, priv);
 	if (ret) {
 		ret = -EINTR;
 		goto out;
 	}
 
 out:
-	kfree(bb_bitmap);
+	kfree(bb_tbl);
+	return ret;
+}
+
+static int nvme_nvm_set_bb_tbl(struct request_queue *q, struct nvm_rq *rqd,
+								int type)
+{
+	struct nvme_ns *ns = q->queuedata;
+	struct nvme_dev *dev = ns->dev;
+	struct nvme_nvm_command c = {};
+	int ret = 0;
+
+	c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
+	c.set_bb.nsid = cpu_to_le32(ns->ns_id);
+	c.set_bb.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+	c.set_bb.nlb = cpu_to_le16(rqd->nr_pages - 1);
+	c.set_bb.value = type;
+
+	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
+	if (ret)
+		dev_err(dev->dev, "set bad block table failed (%d)\n", ret);
 	return ret;
 }
 
@@ -474,6 +540,7 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = {
 	.get_l2p_tbl		= nvme_nvm_get_l2p_tbl,
 
 	.get_bb_tbl		= nvme_nvm_get_bb_tbl,
+	.set_bb_tbl		= nvme_nvm_set_bb_tbl,
 
 	.submit_io		= nvme_nvm_submit_io,
 	.erase_block		= nvme_nvm_erase_block,
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 32b5369..9b3dc1b 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -191,11 +191,11 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
 struct nvm_block;
 
 typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
-typedef int (nvm_bb_update_fn)(u32, void *, unsigned int, void *);
+typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 *, void *);
 typedef int (nvm_id_fn)(struct request_queue *, struct nvm_id *);
 typedef int (nvm_get_l2p_tbl_fn)(struct request_queue *, u64, u32,
 				nvm_l2p_update_fn *, void *);
-typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, int, unsigned int,
+typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, struct ppa_addr, int,
 				nvm_bb_update_fn *, void *);
 typedef int (nvm_op_set_bb_fn)(struct request_queue *, struct nvm_rq *, int);
 typedef int (nvm_submit_io_fn)(struct request_queue *, struct nvm_rq *);
@@ -210,7 +210,7 @@ struct nvm_dev_ops {
 	nvm_id_fn		*identity;
 	nvm_get_l2p_tbl_fn	*get_l2p_tbl;
 	nvm_op_bb_tbl_fn	*get_bb_tbl;
-	nvm_op_set_bb_fn	*set_bb;
+	nvm_op_set_bb_fn	*set_bb_tbl;
 
 	nvm_submit_io_fn	*submit_io;
 	nvm_erase_blk_fn	*erase_block;
-- 
2.1.4

[PATCH 04/13] lightnvm: update alignments for identify command

[Matias Bjørling]

A single 8 bit and 16 bit reserve field were inserted in the
specification to align fields appropriately. Reflect this in the
identify group structure.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 2c35465..60687ed 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -155,11 +155,13 @@ struct nvme_nvm_id_group {
 	__u8			num_ch;
 	__u8			num_lun;
 	__u8			num_pln;
+	__u8			rsvd1;
 	__le16			num_blk;
 	__le16			num_pg;
 	__le16			fpg_sz;
 	__le16			csecs;
 	__le16			sos;
+	__le16			rsvd2;
 	__le32			trdt;
 	__le32			trdm;
 	__le32			tprt;
@@ -168,7 +170,7 @@ struct nvme_nvm_id_group {
 	__le32			tbem;
 	__le32			mpos;
 	__le16			cpar;
-	__u8			reserved[913];
+	__u8			reserved[910];
 } __packed;
 
 struct nvme_nvm_addr_format {
-- 
2.1.4

[PATCH 04/13] lightnvm: update alignments for identify command

[Matias Bjørling]

A single 8 bit and 16 bit reserve field were inserted in the
specification to align fields appropriately. Reflect this in the
identify group structure.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 2c35465..60687ed 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -155,11 +155,13 @@ struct nvme_nvm_id_group {
 	__u8			num_ch;
 	__u8			num_lun;
 	__u8			num_pln;
+	__u8			rsvd1;
 	__le16			num_blk;
 	__le16			num_pg;
 	__le16			fpg_sz;
 	__le16			csecs;
 	__le16			sos;
+	__le16			rsvd2;
 	__le32			trdt;
 	__le32			trdm;
 	__le32			tprt;
@@ -168,7 +170,7 @@ struct nvme_nvm_id_group {
 	__le32			tbem;
 	__le32			mpos;
 	__le16			cpar;
-	__u8			reserved[913];
+	__u8			reserved[910];
 } __packed;
 
 struct nvme_nvm_addr_format {
-- 
2.1.4

[PATCH 05/13] lightnvm: expose mccap in identify command

[Matias Bjørling]

The mccap field is required for I/O command option support. It defines the
following flash access modes:

 * SLC mode
 * Erase/Program Suspension
 * Scramble On/Off
 * Encryption

It is slotted in between mpos and cpar, changing the offset for
cpar as well.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 +++-
 include/linux/lightnvm.h     | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 60687ed..52b311c 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -169,8 +169,9 @@ struct nvme_nvm_id_group {
 	__le32			tbet;
 	__le32			tbem;
 	__le32			mpos;
+	__le32			mccap;
 	__le16			cpar;
-	__u8			reserved[910];
+	__u8			reserved[906];
 } __packed;
 
 struct nvme_nvm_addr_format {
@@ -265,6 +266,7 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
 		dst->tbet = le32_to_cpu(src->tbet);
 		dst->tbem = le32_to_cpu(src->tbem);
 		dst->mpos = le32_to_cpu(src->mpos);
+		dst->mccap = le32_to_cpu(src->mccap);
 
 		dst->cpar = le16_to_cpu(src->cpar);
 	}
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 9b3dc1b..2572856 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -74,6 +74,7 @@ struct nvm_id_group {
 	u32	tbet;
 	u32	tbem;
 	u32	mpos;
+	u32	mccap;
 	u16	cpar;
 	u8	res[913];
 } __packed;
-- 
2.1.4

[PATCH 05/13] lightnvm: expose mccap in identify command

[Matias Bjørling]

The mccap field is required for I/O command option support. It defines the
following flash access modes:

 * SLC mode
 * Erase/Program Suspension
 * Scramble On/Off
 * Encryption

It is slotted in between mpos and cpar, changing the offset for
cpar as well.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 +++-
 include/linux/lightnvm.h     | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 60687ed..52b311c 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -169,8 +169,9 @@ struct nvme_nvm_id_group {
 	__le32			tbet;
 	__le32			tbem;
 	__le32			mpos;
+	__le32			mccap;
 	__le16			cpar;
-	__u8			reserved[910];
+	__u8			reserved[906];
 } __packed;
 
 struct nvme_nvm_addr_format {
@@ -265,6 +266,7 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
 		dst->tbet = le32_to_cpu(src->tbet);
 		dst->tbem = le32_to_cpu(src->tbem);
 		dst->mpos = le32_to_cpu(src->mpos);
+		dst->mccap = le32_to_cpu(src->mccap);
 
 		dst->cpar = le16_to_cpu(src->cpar);
 	}
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 9b3dc1b..2572856 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -74,6 +74,7 @@ struct nvm_id_group {
 	u32	tbet;
 	u32	tbem;
 	u32	mpos;
+	u32	mccap;
 	u16	cpar;
 	u8	res[913];
 } __packed;
-- 
2.1.4

[PATCH 06/13] lightnvm: remove unused attrs in nvm_id structs

[Matias Bjørling]

The nvm_id, nvm_id_group and nvm_addr_format data structures contain
reserved attributes. They are unused by media managers and targets.
Remove them.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 include/linux/lightnvm.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 2572856..e6ef8aa 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -58,7 +58,6 @@ enum {
 struct nvm_id_group {
 	u8	mtype;
 	u8	fmtype;
-	u16	res16;
 	u8	num_ch;
 	u8	num_lun;
 	u8	num_pln;
@@ -76,8 +75,7 @@ struct nvm_id_group {
 	u32	mpos;
 	u32	mccap;
 	u16	cpar;
-	u8	res[913];
-} __packed;
+};
 
 struct nvm_addr_format {
 	u8	ch_offset;
@@ -92,19 +90,16 @@ struct nvm_addr_format {
 	u8	pg_len;
 	u8	sect_offset;
 	u8	sect_len;
-	u8	res[4];
 };
 
 struct nvm_id {
 	u8	ver_id;
 	u8	vmnt;
 	u8	cgrps;
-	u8	res[5];
 	u32	cap;
 	u32	dom;
 	struct nvm_addr_format ppaf;
 	u8	ppat;
-	u8	resv[224];
 	struct nvm_id_group groups[4];
 } __packed;
 
-- 
2.1.4

[PATCH 06/13] lightnvm: remove unused attrs in nvm_id structs

[Matias Bjørling]

The nvm_id, nvm_id_group and nvm_addr_format data structures contain
reserved attributes. They are unused by media managers and targets.
Remove them.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 include/linux/lightnvm.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 2572856..e6ef8aa 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -58,7 +58,6 @@ enum {
 struct nvm_id_group {
 	u8	mtype;
 	u8	fmtype;
-	u16	res16;
 	u8	num_ch;
 	u8	num_lun;
 	u8	num_pln;
@@ -76,8 +75,7 @@ struct nvm_id_group {
 	u32	mpos;
 	u32	mccap;
 	u16	cpar;
-	u8	res[913];
-} __packed;
+};
 
 struct nvm_addr_format {
 	u8	ch_offset;
@@ -92,19 +90,16 @@ struct nvm_addr_format {
 	u8	pg_len;
 	u8	sect_offset;
 	u8	sect_len;
-	u8	res[4];
 };
 
 struct nvm_id {
 	u8	ver_id;
 	u8	vmnt;
 	u8	cgrps;
-	u8	res[5];
 	u32	cap;
 	u32	dom;
 	struct nvm_addr_format ppaf;
 	u8	ppat;
-	u8	resv[224];
 	struct nvm_id_group groups[4];
 } __packed;
 
-- 
2.1.4

[PATCH 07/13] lightnvm: check for NAND flash and its type

[Matias Bjørling]

Only NAND flash with SLC and MLC is supported. Make sure to not try to
initialize TLC memory or other non-volatile memory types.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index f659e60..0985a03 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -185,6 +185,16 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->plane_mode = NVM_PLANE_SINGLE;
 	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
 
+	if (grp->mtype != 0) {
+		pr_err("nvm: memory type not supported\n");
+		return -EINVAL;
+	}
+
+	if (grp->fmtype != 0 && grp->fmtype != 1) {
+		pr_err("nvm: flash type not supported\n");
+		return -EINVAL;
+	}
+
 	if (grp->mpos & 0x020202)
 		dev->plane_mode = NVM_PLANE_DOUBLE;
 	if (grp->mpos & 0x040404)
-- 
2.1.4

[PATCH 07/13] lightnvm: check for NAND flash and its type

[Matias Bjørling]

Only NAND flash with SLC and MLC is supported. Make sure to not try to
initialize TLC memory or other non-volatile memory types.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index f659e60..0985a03 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -185,6 +185,16 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->plane_mode = NVM_PLANE_SINGLE;
 	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
 
+	if (grp->mtype != 0) {
+		pr_err("nvm: memory type not supported\n");
+		return -EINVAL;
+	}
+
+	if (grp->fmtype != 0 && grp->fmtype != 1) {
+		pr_err("nvm: flash type not supported\n");
+		return -EINVAL;
+	}
+
 	if (grp->mpos & 0x020202)
 		dev->plane_mode = NVM_PLANE_DOUBLE;
 	if (grp->mpos & 0x040404)
-- 
2.1.4

[PATCH 08/13] lightnvm: prematurely activate nvm_dev

[Matias Bjørling]

We register with nvm_devices when there registration can still fail.
Move the final registration at the end of the nvm_register function
to make sure we are fully registered when added to the nvm_devices list.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 0985a03..40e6cfa 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -318,10 +318,6 @@ int nvm_register(struct request_queue *q, char *disk_name,
 	if (ret)
 		goto err_init;
 
-	down_write(&nvm_lock);
-	list_add(&dev->devices, &nvm_devices);
-	up_write(&nvm_lock);
-
 	if (dev->ops->max_phys_sect > 1) {
 		dev->ppalist_pool = dev->ops->create_dma_pool(dev->q,
 								"ppalist");
@@ -334,6 +330,10 @@ int nvm_register(struct request_queue *q, char *disk_name,
 		return -EINVAL;
 	}
 
+	down_write(&nvm_lock);
+	list_add(&dev->devices, &nvm_devices);
+	up_write(&nvm_lock);
+
 	return 0;
 err_init:
 	kfree(dev);
-- 
2.1.4

[PATCH 08/13] lightnvm: prematurely activate nvm_dev

[Matias Bjørling]

We register with nvm_devices when there registration can still fail.
Move the final registration at the end of the nvm_register function
to make sure we are fully registered when added to the nvm_devices list.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 0985a03..40e6cfa 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -318,10 +318,6 @@ int nvm_register(struct request_queue *q, char *disk_name,
 	if (ret)
 		goto err_init;
 
-	down_write(&nvm_lock);
-	list_add(&dev->devices, &nvm_devices);
-	up_write(&nvm_lock);
-
 	if (dev->ops->max_phys_sect > 1) {
 		dev->ppalist_pool = dev->ops->create_dma_pool(dev->q,
 								"ppalist");
@@ -334,6 +330,10 @@ int nvm_register(struct request_queue *q, char *disk_name,
 		return -EINVAL;
 	}
 
+	down_write(&nvm_lock);
+	list_add(&dev->devices, &nvm_devices);
+	up_write(&nvm_lock);
+
 	return 0;
 err_init:
 	kfree(dev);
-- 
2.1.4

[PATCH 09/13] lightnvm: prevent double free on init error

[Matias Bjørling]

Both the nvm_register and nvm_init does a kfree(dev) on error. Make sure
to only free it once.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 40e6cfa..899f6b9 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -160,11 +160,6 @@ int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
-static void nvm_core_free(struct nvm_dev *dev)
-{
-	kfree(dev);
-}
-
 static int nvm_core_init(struct nvm_dev *dev)
 {
 	struct nvm_id *id = &dev->identity;
@@ -223,8 +218,6 @@ static void nvm_free(struct nvm_dev *dev)
 
 	if (dev->mt)
 		dev->mt->unregister_mgr(dev);
-
-	nvm_core_free(dev);
 }
 
 static int nvm_init(struct nvm_dev *dev)
@@ -351,11 +344,12 @@ void nvm_unregister(char *disk_name)
 		return;
 	}
 
-	nvm_exit(dev);
-
 	down_write(&nvm_lock);
 	list_del(&dev->devices);
 	up_write(&nvm_lock);
+
+	nvm_exit(dev);
+	kfree(dev);
 }
 EXPORT_SYMBOL(nvm_unregister);
 
-- 
2.1.4

[PATCH 09/13] lightnvm: prevent double free on init error

[Matias Bjørling]

Both the nvm_register and nvm_init does a kfree(dev) on error. Make sure
to only free it once.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/core.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 40e6cfa..899f6b9 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -160,11 +160,6 @@ int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
-static void nvm_core_free(struct nvm_dev *dev)
-{
-	kfree(dev);
-}
-
 static int nvm_core_init(struct nvm_dev *dev)
 {
 	struct nvm_id *id = &dev->identity;
@@ -223,8 +218,6 @@ static void nvm_free(struct nvm_dev *dev)
 
 	if (dev->mt)
 		dev->mt->unregister_mgr(dev);
-
-	nvm_core_free(dev);
 }
 
 static int nvm_init(struct nvm_dev *dev)
@@ -351,11 +344,12 @@ void nvm_unregister(char *disk_name)
 		return;
 	}
 
-	nvm_exit(dev);
-
 	down_write(&nvm_lock);
 	list_del(&dev->devices);
 	up_write(&nvm_lock);
+
+	nvm_exit(dev);
+	kfree(dev);
 }
 EXPORT_SYMBOL(nvm_unregister);
 
-- 
2.1.4

[PATCH 10/13] lightnvm: remove linear and device addr modes

[Matias Bjørling]

The linear and device specific address modes can be replaced with a
simple offset and bit length conversion that is generic across all
devices.

This both simplifies the specification and removes the special case for
qemu nvme, that previously relied on the linear address mapping.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c      |   3 +-
 drivers/lightnvm/gennvm.c    |  12 ++--
 drivers/lightnvm/rrpc.c      |  32 ++++++++-
 drivers/nvme/host/lightnvm.c |   3 +-
 include/linux/lightnvm.h     | 154 ++++++++++---------------------------------
 5 files changed, 73 insertions(+), 131 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 899f6b9..790b1d7 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -174,8 +174,7 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->sec_size = grp->csecs;
 	dev->oob_size = grp->sos;
 	dev->sec_per_pg = grp->fpg_sz / grp->csecs;
-	dev->addr_mode = id->ppat;
-	dev->addr_format = id->ppaf;
+	memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
 
 	dev->plane_mode = NVM_PLANE_SINGLE;
 	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 8cfc011..c0d0eb2 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -73,7 +73,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
 	struct nvm_block *blk;
 	int i;
 
-	ppa = addr_to_generic_mode(gn->dev, ppa);
+	ppa = dev_to_generic_addr(gn->dev, ppa);
 	lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun];
 
 	for (i = 0; i < nr_blocks; i++) {
@@ -179,7 +179,7 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
 			ppa.ppa = 0;
 			ppa.g.ch = lun->vlun.chnl_id;
 			ppa.g.lun = lun->vlun.id;
-			ppa = generic_to_addr_mode(dev, ppa);
+			ppa = generic_to_dev_addr(dev, ppa);
 
 			ret = dev->ops->get_bb_tbl(dev->q, ppa,
 						dev->blks_per_lun,
@@ -304,10 +304,10 @@ static void gennvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 
 	if (rqd->nr_pages > 1) {
 		for (i = 0; i < rqd->nr_pages; i++)
-			rqd->ppa_list[i] = addr_to_generic_mode(dev,
+			rqd->ppa_list[i] = dev_to_generic_addr(dev,
 							rqd->ppa_list[i]);
 	} else {
-		rqd->ppa_addr = addr_to_generic_mode(dev, rqd->ppa_addr);
+		rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
 	}
 }
 
@@ -317,10 +317,10 @@ static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 
 	if (rqd->nr_pages > 1) {
 		for (i = 0; i < rqd->nr_pages; i++)
-			rqd->ppa_list[i] = generic_to_addr_mode(dev,
+			rqd->ppa_list[i] = generic_to_dev_addr(dev,
 							rqd->ppa_list[i]);
 	} else {
-		rqd->ppa_addr = generic_to_addr_mode(dev, rqd->ppa_addr);
+		rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
 	}
 }
 
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 7ba64c8..75e59c3 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -123,12 +123,42 @@ static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 	return blk->id * rrpc->dev->pgs_per_blk;
 }
 
+static struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
+							struct ppa_addr r)
+{
+	struct ppa_addr l;
+	int secs, pgs, blks, luns;
+	sector_t ppa = r.ppa;
+
+	l.ppa = 0;
+
+	div_u64_rem(ppa, dev->sec_per_pg, &secs);
+	l.g.sec = secs;
+
+	sector_div(ppa, dev->sec_per_pg);
+	div_u64_rem(ppa, dev->sec_per_blk, &pgs);
+	l.g.pg = pgs;
+
+	sector_div(ppa, dev->pgs_per_blk);
+	div_u64_rem(ppa, dev->blks_per_lun, &blks);
+	l.g.blk = blks;
+
+	sector_div(ppa, dev->blks_per_lun);
+	div_u64_rem(ppa, dev->luns_per_chnl, &luns);
+	l.g.lun = luns;
+
+	sector_div(ppa, dev->luns_per_chnl);
+	l.g.ch = ppa;
+
+	return l;
+}
+
 static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_dev *dev, u64 addr)
 {
 	struct ppa_addr paddr;
 
 	paddr.ppa = addr;
-	return __linear_to_generic_addr(dev, paddr);
+	return linear_to_generic_addr(dev, paddr);
 }
 
 /* requires lun->lock taken */
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 52b311c..9069be8 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -198,8 +198,7 @@ struct nvme_nvm_id {
 	__le32			cap;
 	__le32			dom;
 	struct nvme_nvm_addr_format ppaf;
-	__u8			ppat;
-	__u8			resv[223];
+	__u8			resv[224];
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index e6ef8aa..cbe288a 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -99,7 +99,6 @@ struct nvm_id {
 	u32	cap;
 	u32	dom;
 	struct nvm_addr_format ppaf;
-	u8	ppat;
 	struct nvm_id_group groups[4];
 } __packed;
 
@@ -119,39 +118,28 @@ struct nvm_tgt_instance {
 #define NVM_VERSION_MINOR 0
 #define NVM_VERSION_PATCH 0
 
-#define NVM_SEC_BITS (8)
-#define NVM_PL_BITS  (6)
-#define NVM_PG_BITS  (16)
 #define NVM_BLK_BITS (16)
-#define NVM_LUN_BITS (10)
+#define NVM_PG_BITS  (16)
+#define NVM_SEC_BITS (8)
+#define NVM_PL_BITS  (8)
+#define NVM_LUN_BITS (8)
 #define NVM_CH_BITS  (8)
 
 struct ppa_addr {
+	/* Generic structure for all addresses */
 	union {
-		/* Channel-based PPA format in nand 4x2x2x2x8x10 */
-		struct {
-			u64 ch		: 4;
-			u64 sec		: 2; /* 4 sectors per page */
-			u64 pl		: 2; /* 4 planes per LUN */
-			u64 lun		: 2; /* 4 LUNs per channel */
-			u64 pg		: 8; /* 256 pages per block */
-			u64 blk		: 10;/* 1024 blocks per plane */
-			u64 resved		: 36;
-		} chnl;
-
-		/* Generic structure for all addresses */
 		struct {
+			u64 blk		: NVM_BLK_BITS;
+			u64 pg		: NVM_PG_BITS;
 			u64 sec		: NVM_SEC_BITS;
 			u64 pl		: NVM_PL_BITS;
-			u64 pg		: NVM_PG_BITS;
-			u64 blk		: NVM_BLK_BITS;
 			u64 lun		: NVM_LUN_BITS;
 			u64 ch		: NVM_CH_BITS;
 		} g;
 
 		u64 ppa;
 	};
-} __packed;
+};
 
 struct nvm_rq {
 	struct nvm_tgt_instance *ins;
@@ -259,8 +247,7 @@ struct nvm_dev {
 	int blks_per_lun;
 	int sec_size;
 	int oob_size;
-	int addr_mode;
-	struct nvm_addr_format addr_format;
+	struct nvm_addr_format ppaf;
 
 	/* Calculated/Cached values. These do not reflect the actual usable
 	 * blocks at run-time.
@@ -286,118 +273,45 @@ struct nvm_dev {
 	char name[DISK_NAME_LEN];
 };
 
-/* fallback conversion */
-static struct ppa_addr __generic_to_linear_addr(struct nvm_dev *dev,
-							struct ppa_addr r)
+static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
+						struct ppa_addr r)
 {
 	struct ppa_addr l;
 
-	l.ppa = r.g.sec +
-		r.g.pg  * dev->sec_per_pg +
-		r.g.blk * (dev->pgs_per_blk *
-				dev->sec_per_pg) +
-		r.g.lun * (dev->blks_per_lun *
-				dev->pgs_per_blk *
-				dev->sec_per_pg) +
-		r.g.ch * (dev->blks_per_lun *
-				dev->pgs_per_blk *
-				dev->luns_per_chnl *
-				dev->sec_per_pg);
+	l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset;
+	l.ppa |= ((u64)r.g.pg) << dev->ppaf.pg_offset;
+	l.ppa |= ((u64)r.g.sec) << dev->ppaf.sect_offset;
+	l.ppa |= ((u64)r.g.pl) << dev->ppaf.pln_offset;
+	l.ppa |= ((u64)r.g.lun) << dev->ppaf.lun_offset;
+	l.ppa |= ((u64)r.g.ch) << dev->ppaf.ch_offset;
 
 	return l;
 }
 
-/* fallback conversion */
-static struct ppa_addr __linear_to_generic_addr(struct nvm_dev *dev,
-							struct ppa_addr r)
+static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
+						struct ppa_addr r)
 {
 	struct ppa_addr l;
-	int secs, pgs, blks, luns;
-	sector_t ppa = r.ppa;
 
-	l.ppa = 0;
-
-	div_u64_rem(ppa, dev->sec_per_pg, &secs);
-	l.g.sec = secs;
-
-	sector_div(ppa, dev->sec_per_pg);
-	div_u64_rem(ppa, dev->sec_per_blk, &pgs);
-	l.g.pg = pgs;
-
-	sector_div(ppa, dev->pgs_per_blk);
-	div_u64_rem(ppa, dev->blks_per_lun, &blks);
-	l.g.blk = blks;
-
-	sector_div(ppa, dev->blks_per_lun);
-	div_u64_rem(ppa, dev->luns_per_chnl, &luns);
-	l.g.lun = luns;
-
-	sector_div(ppa, dev->luns_per_chnl);
-	l.g.ch = ppa;
-
-	return l;
-}
-
-static struct ppa_addr __generic_to_chnl_addr(struct ppa_addr r)
-{
-	struct ppa_addr l;
-
-	l.ppa = 0;
-
-	l.chnl.sec = r.g.sec;
-	l.chnl.pl = r.g.pl;
-	l.chnl.pg = r.g.pg;
-	l.chnl.blk = r.g.blk;
-	l.chnl.lun = r.g.lun;
-	l.chnl.ch = r.g.ch;
+	/*
+	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
+	 */
+	l.g.blk = (r.ppa >> dev->ppaf.blk_offset) &
+					(((1 << dev->ppaf.blk_len) - 1));
+	l.g.pg |= (r.ppa >> dev->ppaf.pg_offset) &
+					(((1 << dev->ppaf.pg_len) - 1));
+	l.g.sec |= (r.ppa >> dev->ppaf.sect_offset) &
+					(((1 << dev->ppaf.sect_len) - 1));
+	l.g.pl |= (r.ppa >> dev->ppaf.pln_offset) &
+					(((1 << dev->ppaf.pln_len) - 1));
+	l.g.lun |= (r.ppa >> dev->ppaf.lun_offset) &
+					(((1 << dev->ppaf.lun_len) - 1));
+	l.g.ch |= (r.ppa >> dev->ppaf.ch_offset) &
+					(((1 << dev->ppaf.ch_len) - 1));
 
 	return l;
 }
 
-static struct ppa_addr __chnl_to_generic_addr(struct ppa_addr r)
-{
-	struct ppa_addr l;
-
-	l.ppa = 0;
-
-	l.g.sec = r.chnl.sec;
-	l.g.pl = r.chnl.pl;
-	l.g.pg = r.chnl.pg;
-	l.g.blk = r.chnl.blk;
-	l.g.lun = r.chnl.lun;
-	l.g.ch = r.chnl.ch;
-
-	return l;
-}
-
-static inline struct ppa_addr addr_to_generic_mode(struct nvm_dev *dev,
-						struct ppa_addr gppa)
-{
-	switch (dev->addr_mode) {
-	case NVM_ADDRMODE_LINEAR:
-		return __linear_to_generic_addr(dev, gppa);
-	case NVM_ADDRMODE_CHANNEL:
-		return __chnl_to_generic_addr(gppa);
-	default:
-		BUG();
-	}
-	return gppa;
-}
-
-static inline struct ppa_addr generic_to_addr_mode(struct nvm_dev *dev,
-						struct ppa_addr gppa)
-{
-	switch (dev->addr_mode) {
-	case NVM_ADDRMODE_LINEAR:
-		return __generic_to_linear_addr(dev, gppa);
-	case NVM_ADDRMODE_CHANNEL:
-		return __generic_to_chnl_addr(gppa);
-	default:
-		BUG();
-	}
-	return gppa;
-}
-
 static inline int ppa_empty(struct ppa_addr ppa_addr)
 {
 	return (ppa_addr.ppa == ADDR_EMPTY);
-- 
2.1.4

[PATCH 10/13] lightnvm: remove linear and device addr modes

[Matias Bjørling]

The linear and device specific address modes can be replaced with a
simple offset and bit length conversion that is generic across all
devices.

This both simplifies the specification and removes the special case for
qemu nvme, that previously relied on the linear address mapping.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/core.c      |   3 +-
 drivers/lightnvm/gennvm.c    |  12 ++--
 drivers/lightnvm/rrpc.c      |  32 ++++++++-
 drivers/nvme/host/lightnvm.c |   3 +-
 include/linux/lightnvm.h     | 154 ++++++++++---------------------------------
 5 files changed, 73 insertions(+), 131 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 899f6b9..790b1d7 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -174,8 +174,7 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->sec_size = grp->csecs;
 	dev->oob_size = grp->sos;
 	dev->sec_per_pg = grp->fpg_sz / grp->csecs;
-	dev->addr_mode = id->ppat;
-	dev->addr_format = id->ppaf;
+	memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
 
 	dev->plane_mode = NVM_PLANE_SINGLE;
 	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 8cfc011..c0d0eb2 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -73,7 +73,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
 	struct nvm_block *blk;
 	int i;
 
-	ppa = addr_to_generic_mode(gn->dev, ppa);
+	ppa = dev_to_generic_addr(gn->dev, ppa);
 	lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun];
 
 	for (i = 0; i < nr_blocks; i++) {
@@ -179,7 +179,7 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
 			ppa.ppa = 0;
 			ppa.g.ch = lun->vlun.chnl_id;
 			ppa.g.lun = lun->vlun.id;
-			ppa = generic_to_addr_mode(dev, ppa);
+			ppa = generic_to_dev_addr(dev, ppa);
 
 			ret = dev->ops->get_bb_tbl(dev->q, ppa,
 						dev->blks_per_lun,
@@ -304,10 +304,10 @@ static void gennvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 
 	if (rqd->nr_pages > 1) {
 		for (i = 0; i < rqd->nr_pages; i++)
-			rqd->ppa_list[i] = addr_to_generic_mode(dev,
+			rqd->ppa_list[i] = dev_to_generic_addr(dev,
 							rqd->ppa_list[i]);
 	} else {
-		rqd->ppa_addr = addr_to_generic_mode(dev, rqd->ppa_addr);
+		rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
 	}
 }
 
@@ -317,10 +317,10 @@ static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 
 	if (rqd->nr_pages > 1) {
 		for (i = 0; i < rqd->nr_pages; i++)
-			rqd->ppa_list[i] = generic_to_addr_mode(dev,
+			rqd->ppa_list[i] = generic_to_dev_addr(dev,
 							rqd->ppa_list[i]);
 	} else {
-		rqd->ppa_addr = generic_to_addr_mode(dev, rqd->ppa_addr);
+		rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
 	}
 }
 
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 7ba64c8..75e59c3 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -123,12 +123,42 @@ static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 	return blk->id * rrpc->dev->pgs_per_blk;
 }
 
+static struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
+							struct ppa_addr r)
+{
+	struct ppa_addr l;
+	int secs, pgs, blks, luns;
+	sector_t ppa = r.ppa;
+
+	l.ppa = 0;
+
+	div_u64_rem(ppa, dev->sec_per_pg, &secs);
+	l.g.sec = secs;
+
+	sector_div(ppa, dev->sec_per_pg);
+	div_u64_rem(ppa, dev->sec_per_blk, &pgs);
+	l.g.pg = pgs;
+
+	sector_div(ppa, dev->pgs_per_blk);
+	div_u64_rem(ppa, dev->blks_per_lun, &blks);
+	l.g.blk = blks;
+
+	sector_div(ppa, dev->blks_per_lun);
+	div_u64_rem(ppa, dev->luns_per_chnl, &luns);
+	l.g.lun = luns;
+
+	sector_div(ppa, dev->luns_per_chnl);
+	l.g.ch = ppa;
+
+	return l;
+}
+
 static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_dev *dev, u64 addr)
 {
 	struct ppa_addr paddr;
 
 	paddr.ppa = addr;
-	return __linear_to_generic_addr(dev, paddr);
+	return linear_to_generic_addr(dev, paddr);
 }
 
 /* requires lun->lock taken */
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 52b311c..9069be8 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -198,8 +198,7 @@ struct nvme_nvm_id {
 	__le32			cap;
 	__le32			dom;
 	struct nvme_nvm_addr_format ppaf;
-	__u8			ppat;
-	__u8			resv[223];
+	__u8			resv[224];
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index e6ef8aa..cbe288a 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -99,7 +99,6 @@ struct nvm_id {
 	u32	cap;
 	u32	dom;
 	struct nvm_addr_format ppaf;
-	u8	ppat;
 	struct nvm_id_group groups[4];
 } __packed;
 
@@ -119,39 +118,28 @@ struct nvm_tgt_instance {
 #define NVM_VERSION_MINOR 0
 #define NVM_VERSION_PATCH 0
 
-#define NVM_SEC_BITS (8)
-#define NVM_PL_BITS  (6)
-#define NVM_PG_BITS  (16)
 #define NVM_BLK_BITS (16)
-#define NVM_LUN_BITS (10)
+#define NVM_PG_BITS  (16)
+#define NVM_SEC_BITS (8)
+#define NVM_PL_BITS  (8)
+#define NVM_LUN_BITS (8)
 #define NVM_CH_BITS  (8)
 
 struct ppa_addr {
+	/* Generic structure for all addresses */
 	union {
-		/* Channel-based PPA format in nand 4x2x2x2x8x10 */
-		struct {
-			u64 ch		: 4;
-			u64 sec		: 2; /* 4 sectors per page */
-			u64 pl		: 2; /* 4 planes per LUN */
-			u64 lun		: 2; /* 4 LUNs per channel */
-			u64 pg		: 8; /* 256 pages per block */
-			u64 blk		: 10;/* 1024 blocks per plane */
-			u64 resved		: 36;
-		} chnl;
-
-		/* Generic structure for all addresses */
 		struct {
+			u64 blk		: NVM_BLK_BITS;
+			u64 pg		: NVM_PG_BITS;
 			u64 sec		: NVM_SEC_BITS;
 			u64 pl		: NVM_PL_BITS;
-			u64 pg		: NVM_PG_BITS;
-			u64 blk		: NVM_BLK_BITS;
 			u64 lun		: NVM_LUN_BITS;
 			u64 ch		: NVM_CH_BITS;
 		} g;
 
 		u64 ppa;
 	};
-} __packed;
+};
 
 struct nvm_rq {
 	struct nvm_tgt_instance *ins;
@@ -259,8 +247,7 @@ struct nvm_dev {
 	int blks_per_lun;
 	int sec_size;
 	int oob_size;
-	int addr_mode;
-	struct nvm_addr_format addr_format;
+	struct nvm_addr_format ppaf;
 
 	/* Calculated/Cached values. These do not reflect the actual usable
 	 * blocks at run-time.
@@ -286,118 +273,45 @@ struct nvm_dev {
 	char name[DISK_NAME_LEN];
 };
 
-/* fallback conversion */
-static struct ppa_addr __generic_to_linear_addr(struct nvm_dev *dev,
-							struct ppa_addr r)
+static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
+						struct ppa_addr r)
 {
 	struct ppa_addr l;
 
-	l.ppa = r.g.sec +
-		r.g.pg  * dev->sec_per_pg +
-		r.g.blk * (dev->pgs_per_blk *
-				dev->sec_per_pg) +
-		r.g.lun * (dev->blks_per_lun *
-				dev->pgs_per_blk *
-				dev->sec_per_pg) +
-		r.g.ch * (dev->blks_per_lun *
-				dev->pgs_per_blk *
-				dev->luns_per_chnl *
-				dev->sec_per_pg);
+	l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset;
+	l.ppa |= ((u64)r.g.pg) << dev->ppaf.pg_offset;
+	l.ppa |= ((u64)r.g.sec) << dev->ppaf.sect_offset;
+	l.ppa |= ((u64)r.g.pl) << dev->ppaf.pln_offset;
+	l.ppa |= ((u64)r.g.lun) << dev->ppaf.lun_offset;
+	l.ppa |= ((u64)r.g.ch) << dev->ppaf.ch_offset;
 
 	return l;
 }
 
-/* fallback conversion */
-static struct ppa_addr __linear_to_generic_addr(struct nvm_dev *dev,
-							struct ppa_addr r)
+static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
+						struct ppa_addr r)
 {
 	struct ppa_addr l;
-	int secs, pgs, blks, luns;
-	sector_t ppa = r.ppa;
 
-	l.ppa = 0;
-
-	div_u64_rem(ppa, dev->sec_per_pg, &secs);
-	l.g.sec = secs;
-
-	sector_div(ppa, dev->sec_per_pg);
-	div_u64_rem(ppa, dev->sec_per_blk, &pgs);
-	l.g.pg = pgs;
-
-	sector_div(ppa, dev->pgs_per_blk);
-	div_u64_rem(ppa, dev->blks_per_lun, &blks);
-	l.g.blk = blks;
-
-	sector_div(ppa, dev->blks_per_lun);
-	div_u64_rem(ppa, dev->luns_per_chnl, &luns);
-	l.g.lun = luns;
-
-	sector_div(ppa, dev->luns_per_chnl);
-	l.g.ch = ppa;
-
-	return l;
-}
-
-static struct ppa_addr __generic_to_chnl_addr(struct ppa_addr r)
-{
-	struct ppa_addr l;
-
-	l.ppa = 0;
-
-	l.chnl.sec = r.g.sec;
-	l.chnl.pl = r.g.pl;
-	l.chnl.pg = r.g.pg;
-	l.chnl.blk = r.g.blk;
-	l.chnl.lun = r.g.lun;
-	l.chnl.ch = r.g.ch;
+	/*
+	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
+	 */
+	l.g.blk = (r.ppa >> dev->ppaf.blk_offset) &
+					(((1 << dev->ppaf.blk_len) - 1));
+	l.g.pg |= (r.ppa >> dev->ppaf.pg_offset) &
+					(((1 << dev->ppaf.pg_len) - 1));
+	l.g.sec |= (r.ppa >> dev->ppaf.sect_offset) &
+					(((1 << dev->ppaf.sect_len) - 1));
+	l.g.pl |= (r.ppa >> dev->ppaf.pln_offset) &
+					(((1 << dev->ppaf.pln_len) - 1));
+	l.g.lun |= (r.ppa >> dev->ppaf.lun_offset) &
+					(((1 << dev->ppaf.lun_len) - 1));
+	l.g.ch |= (r.ppa >> dev->ppaf.ch_offset) &
+					(((1 << dev->ppaf.ch_len) - 1));
 
 	return l;
 }
 
-static struct ppa_addr __chnl_to_generic_addr(struct ppa_addr r)
-{
-	struct ppa_addr l;
-
-	l.ppa = 0;
-
-	l.g.sec = r.chnl.sec;
-	l.g.pl = r.chnl.pl;
-	l.g.pg = r.chnl.pg;
-	l.g.blk = r.chnl.blk;
-	l.g.lun = r.chnl.lun;
-	l.g.ch = r.chnl.ch;
-
-	return l;
-}
-
-static inline struct ppa_addr addr_to_generic_mode(struct nvm_dev *dev,
-						struct ppa_addr gppa)
-{
-	switch (dev->addr_mode) {
-	case NVM_ADDRMODE_LINEAR:
-		return __linear_to_generic_addr(dev, gppa);
-	case NVM_ADDRMODE_CHANNEL:
-		return __chnl_to_generic_addr(gppa);
-	default:
-		BUG();
-	}
-	return gppa;
-}
-
-static inline struct ppa_addr generic_to_addr_mode(struct nvm_dev *dev,
-						struct ppa_addr gppa)
-{
-	switch (dev->addr_mode) {
-	case NVM_ADDRMODE_LINEAR:
-		return __generic_to_linear_addr(dev, gppa);
-	case NVM_ADDRMODE_CHANNEL:
-		return __generic_to_chnl_addr(gppa);
-	default:
-		BUG();
-	}
-	return gppa;
-}
-
 static inline int ppa_empty(struct ppa_addr ppa_addr)
 {
 	return (ppa_addr.ppa == ADDR_EMPTY);
-- 
2.1.4

[PATCH 11/13] nvme: missing ppaf copy

[Matias Bjørling]

The ppa format was not copied from the NVMe specific ppa format to the
lightnvm specific ppa format. This led to the ppa format not being
communicated to the layers above.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 9069be8..fd37123 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -300,6 +300,8 @@ static int nvme_nvm_identity(struct request_queue *q, struct nvm_id *nvm_id)
 	nvm_id->cgrps = nvme_nvm_id->cgrps;
 	nvm_id->cap = le32_to_cpu(nvme_nvm_id->cap);
 	nvm_id->dom = le32_to_cpu(nvme_nvm_id->dom);
+	memcpy(&nvm_id->ppaf, &nvme_nvm_id->ppaf,
+					sizeof(struct nvme_nvm_addr_format));
 
 	ret = init_grps(nvm_id, nvme_nvm_id);
 out:
-- 
2.1.4

[PATCH 11/13] nvme: missing ppaf copy

[Matias Bjørling]

The ppa format was not copied from the NVMe specific ppa format to the
lightnvm specific ppa format. This led to the ppa format not being
communicated to the layers above.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 9069be8..fd37123 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -300,6 +300,8 @@ static int nvme_nvm_identity(struct request_queue *q, struct nvm_id *nvm_id)
 	nvm_id->cgrps = nvme_nvm_id->cgrps;
 	nvm_id->cap = le32_to_cpu(nvme_nvm_id->cap);
 	nvm_id->dom = le32_to_cpu(nvme_nvm_id->dom);
+	memcpy(&nvm_id->ppaf, &nvme_nvm_id->ppaf,
+					sizeof(struct nvme_nvm_addr_format));
 
 	ret = init_grps(nvm_id, nvme_nvm_id);
 out:
-- 
2.1.4

[PATCH 12/13] nvme: remove reserved double word

[Matias Bjørling]

The specification was updated the remove the double word just after
number of configuration groups and capabilities. Update the identify
structure to reflect it.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index fd37123..7e82fe3 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -194,11 +194,11 @@ struct nvme_nvm_id {
 	__u8			ver_id;
 	__u8			vmnt;
 	__u8			cgrps;
-	__u8			res[5];
+	__u8			res;
 	__le32			cap;
 	__le32			dom;
 	struct nvme_nvm_addr_format ppaf;
-	__u8			resv[224];
+	__u8			resv[228];
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
-- 
2.1.4

[PATCH 12/13] nvme: remove reserved double word

[Matias Bjørling]

The specification was updated the remove the double word just after
number of configuration groups and capabilities. Update the identify
structure to reflect it.

Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/nvme/host/lightnvm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index fd37123..7e82fe3 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -194,11 +194,11 @@ struct nvme_nvm_id {
 	__u8			ver_id;
 	__u8			vmnt;
 	__u8			cgrps;
-	__u8			res[5];
+	__u8			res;
 	__le32			cap;
 	__le32			dom;
 	struct nvme_nvm_addr_format ppaf;
-	__u8			resv[224];
+	__u8			resv[228];
 	struct nvme_nvm_id_group groups[4];
 } __packed;
 
-- 
2.1.4

[PATCH 13/13] lightnvm: cleanup queue before target removal

[Matias Bjørling]

From: Javier González <javier@javigon.com>

This prevents outstanding IOs to be sent for completion to target after
the target has been removed. The flow is now: stop new IOs > cleanup
queue > remove target.

Signed-off-by: Javier Gonzalez <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 790b1d7..8a556f3 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -460,11 +460,11 @@ static void nvm_remove_target(struct nvm_target *t)
 	lockdep_assert_held(&nvm_lock);
 
 	del_gendisk(tdisk);
+	blk_cleanup_queue(q);
+
 	if (tt->exit)
 		tt->exit(tdisk->private_data);
 
-	blk_cleanup_queue(q);
-
 	put_disk(tdisk);
 
 	list_del(&t->list);
-- 
2.1.4

[PATCH 13/13] lightnvm: cleanup queue before target removal

[Matias Bjørling]

From: Javier Gonz?lez <javier@javigon.com>

This prevents outstanding IOs to be sent for completion to target after
the target has been removed. The flow is now: stop new IOs > cleanup
queue > remove target.

Signed-off-by: Javier Gonzalez <javier at cnexlabs.com>
Signed-off-by: Matias Bj?rling <m at bjorling.me>
---
 drivers/lightnvm/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 790b1d7..8a556f3 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -460,11 +460,11 @@ static void nvm_remove_target(struct nvm_target *t)
 	lockdep_assert_held(&nvm_lock);
 
 	del_gendisk(tdisk);
+	blk_cleanup_queue(q);
+
 	if (tt->exit)
 		tt->exit(tdisk->private_data);
 
-	blk_cleanup_queue(q);
-
 	put_disk(tdisk);
 
 	list_del(&t->list);
-- 
2.1.4

Re: [PATCH 00/13] lightnvm updates for 4.4-rc2

[Jens Axboe]

On 11/16/2015 07:34 AM, Matias Bjørling wrote:
> Hi Jens,
>
> This is the patches targeted for -rc2 of 4.4.
>
> Ten of the patches fix bugs and small specification updates. While the
> last two are larger patches. They are necessary because of specification
> changes. The updates are applied now before it is set in stone for 4.4
> (or at least makes it a lot harder to change)
>
> Patch 1: Adds the linux-block list to the maintainers list for LightNVM.
> Patch 2: Fixes a ushort bug reported by Geert.
> Patch 3: Updates the implementation to support the new bad block table
>           format.
> Patch 4-9: Small fixes.
> Patch 10: The specification had support for both linear and device
>            specific addressing. It was replaced by ppa format, that
>            defines the device ppa format used by the specific device.
>            This patch adds the support and removes the previous two
>            modes.
> Patch 11-12: Two small cleanups to the lightnvm nvme integration.
>            Caused by specification changes.
>
> Patches 3 to 12 is the first time they are posted to the list for
> review.
>
> Will you pick up the patches when convenient (and reviewed):
>
>    git@github.com:OpenChannelSSD/linux.git for-jens
>
> I'll update the for-jens branch and post a separate patch if any
> fixes is applied to the patches.

Applied, thanks.

-- 
Jens Axboe

[PATCH 00/13] lightnvm updates for 4.4-rc2

[Jens Axboe]

On 11/16/2015 07:34 AM, Matias Bj?rling wrote:
> Hi Jens,
>
> This is the patches targeted for -rc2 of 4.4.
>
> Ten of the patches fix bugs and small specification updates. While the
> last two are larger patches. They are necessary because of specification
> changes. The updates are applied now before it is set in stone for 4.4
> (or at least makes it a lot harder to change)
>
> Patch 1: Adds the linux-block list to the maintainers list for LightNVM.
> Patch 2: Fixes a ushort bug reported by Geert.
> Patch 3: Updates the implementation to support the new bad block table
>           format.
> Patch 4-9: Small fixes.
> Patch 10: The specification had support for both linear and device
>            specific addressing. It was replaced by ppa format, that
>            defines the device ppa format used by the specific device.
>            This patch adds the support and removes the previous two
>            modes.
> Patch 11-12: Two small cleanups to the lightnvm nvme integration.
>            Caused by specification changes.
>
> Patches 3 to 12 is the first time they are posted to the list for
> review.
>
> Will you pick up the patches when convenient (and reviewed):
>
>    git at github.com:OpenChannelSSD/linux.git for-jens
>
> I'll update the for-jens branch and post a separate patch if any
> fixes is applied to the patches.

Applied, thanks.

-- 
Jens Axboe