[PATCH 00/20] lightnvm: simplify media manager

[PATCH 00/20] lightnvm: simplify media manager

[Javier González]

This patchset simplifies the generic media manager interface and moves
lun and block functionality to lightnvm targets. This makes that
rrpc-specific functionality is not exposed on the media manager. This is
done in preparation for the pblk target.

Matias: patches 0 - 4 have been posted before. Patches apply to you
for-4.10/core

Javier González (20):
  lightnvm: enable to send hint to erase command
  lightnvm: do not protect block 0
  lightnvm: export set bad block table
  lightnvm: add ECC error codes
  lightnvm: rrpc: split bios of size > 256kb
  lightnvm: remove sysfs configuration interface
  lightnvm: cleanup unused target operations
  lightnvm: make address conversion functions global
  lightnvm: remove unnecessary variables in rrpc
  lightnvm: use constant name instead of value
  lightnvm: remove gen_lun abstraction
  lightnvm: manage lun partitions internally in mm
  lightnvm: move block provisioning to targets
  lightnvm: remove get_lun operation on gennvm
  lightnvm: remove debug lun statistics from gennvm
  lightnvm: eliminate nvm_block abstraction on mm
  lightnvm: eliminate nvm_lun abstraction in mm
  lightnvm: introduce helpers for generic ops in rrpc
  lightnvm: introduce max_phys_sects helper function
  lightnvm: use target nvm on target-specific ops.

 drivers/lightnvm/core.c      | 306 ++++++++------------
 drivers/lightnvm/gennvm.c    | 664 ++++++++++++++++++++-----------------------
 drivers/lightnvm/gennvm.h    |  34 ++-
 drivers/lightnvm/rrpc.c      | 512 +++++++++++++++++++++------------
 drivers/lightnvm/rrpc.h      |  65 ++++-
 drivers/lightnvm/sysblk.c    |  98 +++----
 drivers/nvme/host/lightnvm.c |  15 +-
 include/linux/lightnvm.h     | 231 +++++++--------
 8 files changed, 1005 insertions(+), 920 deletions(-)

-- 
2.7.4

[PATCH 01/20] lightnvm: enable to send hint to erase command

[Javier González]

From: Javier González <jg@lightnvm.io>

Erases might be subject to host hints. An example is multi-plane
programming to erase blocks in parallel. Enable targets to specify this
hints.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c      | 9 ++++++---
 drivers/lightnvm/gennvm.c    | 5 ++---
 drivers/lightnvm/rrpc.c      | 2 +-
 drivers/lightnvm/sysblk.c    | 4 ++--
 drivers/nvme/host/lightnvm.c | 1 +
 include/linux/lightnvm.h     | 7 +++----
 6 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 1111740..8664fe0 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -202,9 +202,9 @@ int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 }
 EXPORT_SYMBOL(nvm_submit_io);
 
-int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
+int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
 {
-	return dev->mt->erase_blk(dev, blk, 0);
+	return dev->mt->erase_blk(dev, blk, flags);
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
@@ -285,7 +285,8 @@ void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
 }
 EXPORT_SYMBOL(nvm_free_rqd_ppalist);
 
-int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
+int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
+								int flags)
 {
 	struct nvm_rq rqd;
 	int ret;
@@ -301,6 +302,8 @@ int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
 
 	nvm_generic_to_addr_mode(dev, &rqd);
 
+	rqd.flags = flags;
+
 	ret = dev->ops->erase_block(dev, &rqd);
 
 	nvm_free_rqd_ppalist(dev, &rqd);
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index b74174c..730d736 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -593,12 +593,11 @@ static int gen_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 	return dev->ops->submit_io(dev, rqd);
 }
 
-static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk,
-							unsigned long flags)
+static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
 {
 	struct ppa_addr addr = block_to_ppa(dev, blk);
 
-	return nvm_erase_ppa(dev, &addr, 1);
+	return nvm_erase_ppa(dev, &addr, 1, flags);
 }
 
 static int gen_reserve_lun(struct nvm_dev *dev, int lunid)
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 37fcaad..067e890 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -404,7 +404,7 @@ static void rrpc_block_gc(struct work_struct *work)
 	if (rrpc_move_valid_pages(rrpc, rblk))
 		goto put_back;
 
-	if (nvm_erase_blk(dev, rblk->parent))
+	if (nvm_erase_blk(dev, rblk->parent, 0))
 		goto put_back;
 
 	rrpc_put_blk(rrpc, rblk);
diff --git a/drivers/lightnvm/sysblk.c b/drivers/lightnvm/sysblk.c
index a75bd28..d229067 100644
--- a/drivers/lightnvm/sysblk.c
+++ b/drivers/lightnvm/sysblk.c
@@ -379,7 +379,7 @@ static int nvm_prepare_new_sysblks(struct nvm_dev *dev, struct sysblk_scan *s)
 		ppa = &s->ppas[scan_ppa_idx(i, nxt_blk)];
 		ppa->g.pg = ppa_to_slc(dev, 0);
 
-		ret = nvm_erase_ppa(dev, ppa, 1);
+		ret = nvm_erase_ppa(dev, ppa, 1, 0);
 		if (ret)
 			return ret;
 
@@ -725,7 +725,7 @@ int nvm_dev_factory(struct nvm_dev *dev, int flags)
 	/* continue to erase until list of blks until empty */
 	while ((ppa_cnt =
 			nvm_fact_get_blks(dev, ppas, max_ppas, blk_bitmap)) > 0)
-		nvm_erase_ppa(dev, ppas, ppa_cnt);
+		nvm_erase_ppa(dev, ppas, ppa_cnt, 0);
 
 	/* mark host reserved blocks free */
 	if (flags & NVM_FACTORY_RESET_HOST_BLKS) {
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index f23e6fe..037dff5 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -526,6 +526,7 @@ static int nvme_nvm_erase_block(struct nvm_dev *dev, struct nvm_rq *rqd)
 	c.erase.nsid = cpu_to_le32(ns->ns_id);
 	c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa);
 	c.erase.length = cpu_to_le16(rqd->nr_ppas - 1);
+	c.erase.control = cpu_to_le16(rqd->flags);
 
 	return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
 }
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index fb2e601..d87be02 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -470,8 +470,7 @@ typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *);
 typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *);
 typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
-typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
-								unsigned long);
+typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
 typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
 typedef int (nvmm_reserve_lun)(struct nvm_dev *, int);
@@ -537,8 +536,8 @@ extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
 					const struct ppa_addr *, int, int);
 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
-extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int);
-extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
+extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
+extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *, int);
 extern void nvm_end_io(struct nvm_rq *, int);
 extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
 								void *, int);
-- 
2.7.4

[PATCH 02/20] lightnvm: do not protect block 0

[Javier González]

From: Javier González <jg@lightnvm.io>

Device blocks should be marked by the device and considered as bad
blocks by the media manager. Thus, do not make assumptions on which
blocks are going to be used by the device. In doing so we might lose
valid blocks from the free list.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/gennvm.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 730d736..a7e17fa 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -371,12 +371,6 @@ static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 			block->lun = &lun->vlun;
 			block->id = cur_block_id++;
 
-			/* First block is reserved for device */
-			if (unlikely(lun_iter == 0 && blk_iter == 0)) {
-				lun->vlun.nr_free_blocks--;
-				continue;
-			}
-
 			list_add_tail(&block->list, &lun->free_list);
 		}
 
-- 
2.7.4

[PATCH 03/20] lightnvm: export set bad block table

[Javier González]

From: Javier González <jg@lightnvm.io>

Bad blocks should be managed by block owners. This would be either
targets for data blocks or sysblk for system blocks.

In order to support this, export two functions: One to mark a block as
an specific type (e.g., bad block) and another to update the bad block
table on the device.

Move bad block management to rrpc.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 drivers/lightnvm/core.c   | 27 +++++++++++++++++++++++++++
 drivers/lightnvm/gennvm.c | 24 ------------------------
 drivers/lightnvm/rrpc.c   | 34 +++++++++++++++++++++++++++++++++-
 drivers/lightnvm/sysblk.c | 29 +++++------------------------
 include/linux/lightnvm.h  | 13 ++++++++++++-
 5 files changed, 77 insertions(+), 50 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 8664fe0..6527cf6 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -196,6 +196,33 @@ void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 }
 EXPORT_SYMBOL(nvm_mark_blk);
 
+int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
+								int type)
+{
+	struct nvm_rq rqd;
+	int ret;
+
+	if (nr_ppas > dev->ops->max_phys_sect) {
+		pr_err("nvm: unable to update all sysblocks atomically\n");
+		return -EINVAL;
+	}
+
+	memset(&rqd, 0, sizeof(struct nvm_rq));
+
+	nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
+	nvm_generic_to_addr_mode(dev, &rqd);
+
+	ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
+	nvm_free_rqd_ppalist(dev, &rqd);
+	if (ret) {
+		pr_err("nvm: sysblk failed bb mark\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(nvm_set_bb_tbl);
+
 int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 {
 	return dev->mt->submit_io(dev, rqd);
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index a7e17fa..e969e3a 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -543,34 +543,10 @@ static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 	blk->state = type;
 }
 
-/*
- * mark block bad in gen. It is expected that the target recovers separately
- */
-static void gen_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
-{
-	int bit = -1;
-	int max_secs = dev->ops->max_phys_sect;
-	void *comp_bits = &rqd->ppa_status;
-
-	nvm_addr_to_generic_mode(dev, rqd);
-
-	/* look up blocks and mark them as bad */
-	if (rqd->nr_ppas == 1) {
-		gen_mark_blk(dev, rqd->ppa_addr, NVM_BLK_ST_BAD);
-		return;
-	}
-
-	while ((bit = find_next_bit(comp_bits, max_secs, bit + 1)) < max_secs)
-		gen_mark_blk(dev, rqd->ppa_list[bit], NVM_BLK_ST_BAD);
-}
-
 static void gen_end_io(struct nvm_rq *rqd)
 {
 	struct nvm_tgt_instance *ins = rqd->ins;
 
-	if (rqd->error == NVM_RSP_ERR_FAILWRITE)
-		gen_mark_blk_bad(rqd->dev, rqd);
-
 	ins->tt->end_io(rqd);
 }
 
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 067e890..2b71b7e 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -675,6 +675,34 @@ static void rrpc_run_gc(struct rrpc *rrpc, struct rrpc_block *rblk)
 	queue_work(rrpc->kgc_wq, &gcb->ws_gc);
 }
 
+static void __rrpc_mark_bad_block(struct nvm_dev *dev, struct ppa_addr *ppa)
+{
+		nvm_mark_blk(dev, *ppa, NVM_BLK_ST_BAD);
+		nvm_set_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
+}
+
+static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd)
+{
+	struct nvm_dev *dev = rrpc->dev;
+	void *comp_bits = &rqd->ppa_status;
+	struct ppa_addr ppa, prev_ppa;
+	int nr_ppas = rqd->nr_ppas;
+	int bit;
+
+	if (rqd->nr_ppas == 1)
+		__rrpc_mark_bad_block(dev, &rqd->ppa_addr);
+
+	ppa_set_empty(&prev_ppa);
+	bit = -1;
+	while ((bit = find_next_bit(comp_bits, nr_ppas, bit + 1)) < nr_ppas) {
+		ppa = rqd->ppa_list[bit];
+		if (ppa_cmp_blk(ppa, prev_ppa))
+			continue;
+
+		__rrpc_mark_bad_block(dev, &ppa);
+	}
+}
+
 static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
 						sector_t laddr, uint8_t npages)
 {
@@ -701,8 +729,12 @@ static void rrpc_end_io(struct nvm_rq *rqd)
 	uint8_t npages = rqd->nr_ppas;
 	sector_t laddr = rrpc_get_laddr(rqd->bio) - npages;
 
-	if (bio_data_dir(rqd->bio) == WRITE)
+	if (bio_data_dir(rqd->bio) == WRITE) {
+		if (rqd->error == NVM_RSP_ERR_FAILWRITE)
+			rrpc_mark_bad_block(rrpc, rqd);
+
 		rrpc_end_io_write(rrpc, rrqd, laddr, npages);
+	}
 
 	bio_put(rqd->bio);
 
diff --git a/drivers/lightnvm/sysblk.c b/drivers/lightnvm/sysblk.c
index d229067..fa644af 100644
--- a/drivers/lightnvm/sysblk.c
+++ b/drivers/lightnvm/sysblk.c
@@ -267,29 +267,10 @@ static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa,
 	return found;
 }
 
-static int nvm_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, int type)
+static int nvm_sysblk_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s,
+								int type)
 {
-	struct nvm_rq rqd;
-	int ret;
-
-	if (s->nr_ppas > dev->ops->max_phys_sect) {
-		pr_err("nvm: unable to update all sysblocks atomically\n");
-		return -EINVAL;
-	}
-
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	nvm_set_rqd_ppalist(dev, &rqd, s->ppas, s->nr_ppas, 1);
-	nvm_generic_to_addr_mode(dev, &rqd);
-
-	ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
-	nvm_free_rqd_ppalist(dev, &rqd);
-	if (ret) {
-		pr_err("nvm: sysblk failed bb mark\n");
-		return -EINVAL;
-	}
-
-	return 0;
+	return nvm_set_bb_tbl(dev, s->ppas, s->nr_ppas, type);
 }
 
 static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
@@ -573,7 +554,7 @@ int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info)
 	if (ret)
 		goto err_mark;
 
-	ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_HOST);
+	ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_HOST);
 	if (ret)
 		goto err_mark;
 
@@ -733,7 +714,7 @@ int nvm_dev_factory(struct nvm_dev *dev, int flags)
 		mutex_lock(&dev->mlock);
 		ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0);
 		if (!ret)
-			ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_FREE);
+			ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_FREE);
 		mutex_unlock(&dev->mlock);
 	}
 err_ppas:
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index d87be02..4480d1c 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -423,6 +423,15 @@ static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
 	return ppa;
 }
 
+static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
+{
+	if (ppa_empty(ppa1) || ppa_empty(ppa2))
+		return 0;
+
+	return ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) &&
+					(ppa1.g.blk == ppa2.g.blk));
+}
+
 static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
 {
 	return dev->lptbl[slc_pg];
@@ -528,7 +537,9 @@ extern struct nvm_dev *nvm_alloc_dev(int);
 extern int nvm_register(struct nvm_dev *);
 extern void nvm_unregister(struct nvm_dev *);
 
-void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
+extern void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
+extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas,
+							int nr_ppas, int type);
 
 extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
 extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
-- 
2.7.4

[PATCH 04/20] lightnvm: add ECC error codes

[Javier González]

From: Javier González <jg@lightnvm.io>

Add ECC error codes to enable the appropriate handling in the target.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 include/linux/lightnvm.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 4480d1c..6b26a32 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -107,6 +107,8 @@ enum {
 	NVM_RSP_NOT_CHANGEABLE	= 0x1,
 	NVM_RSP_ERR_FAILWRITE	= 0x40ff,
 	NVM_RSP_ERR_EMPTYPAGE	= 0x42ff,
+	NVM_RSP_ERR_FAILECC	= 0x4281,
+	NVM_RSP_WARN_HIGHECC	= 0x4700,
 
 	/* Device opcodes */
 	NVM_OP_HBREAD		= 0x02,
-- 
2.7.4

[PATCH 05/20] lightnvm: rrpc: split bios of size > 256kb

[Javier González]

From: Javier González <jg@lightnvm.io>

rrpc cannot handle bios of size > 256kb due to NVMe using a 64 bit
bitmap to signal I/O completion. If a larger bio comes, split it
explicitly.

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

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 2b71b7e..60ca9d4 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -943,6 +943,8 @@ static blk_qc_t rrpc_make_rq(struct request_queue *q, struct bio *bio)
 	struct nvm_rq *rqd;
 	int err;
 
+	blk_queue_split(q, &bio, q->bio_split);
+
 	if (bio_op(bio) == REQ_OP_DISCARD) {
 		rrpc_discard(rrpc, bio);
 		return BLK_QC_T_NONE;
-- 
2.7.4

[PATCH 06/20] lightnvm: remove sysfs configuration interface

[Javier González]

LightNVM used to be managed and configured through sysfs. Since the
introduction of management ioctls this interface is redundant and
outdated. Get rid of it.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c | 134 ------------------------------------------------
 1 file changed, 134 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 6527cf6..d4433d3 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -780,140 +780,6 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
 	return dev->mt->create_tgt(dev, create);
 }
 
-#ifdef CONFIG_NVM_DEBUG
-static int nvm_configure_show(const char *val)
-{
-	struct nvm_dev *dev;
-	char opcode, devname[DISK_NAME_LEN];
-	int ret;
-
-	ret = sscanf(val, "%c %32s", &opcode, devname);
-	if (ret != 2) {
-		pr_err("nvm: invalid command. Use \"opcode devicename\".\n");
-		return -EINVAL;
-	}
-
-	down_write(&nvm_lock);
-	dev = nvm_find_nvm_dev(devname);
-	up_write(&nvm_lock);
-	if (!dev) {
-		pr_err("nvm: device not found\n");
-		return -EINVAL;
-	}
-
-	if (!dev->mt)
-		return 0;
-
-	dev->mt->lun_info_print(dev);
-
-	return 0;
-}
-
-static int nvm_configure_remove(const char *val)
-{
-	struct nvm_ioctl_remove remove;
-	struct nvm_dev *dev;
-	char opcode;
-	int ret = 0;
-
-	ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
-	if (ret != 2) {
-		pr_err("nvm: invalid command. Use \"d targetname\".\n");
-		return -EINVAL;
-	}
-
-	remove.flags = 0;
-
-	list_for_each_entry(dev, &nvm_devices, devices) {
-		ret = dev->mt->remove_tgt(dev, &remove);
-		if (!ret)
-			break;
-	}
-
-	return ret;
-}
-
-static int nvm_configure_create(const char *val)
-{
-	struct nvm_ioctl_create create;
-	char opcode;
-	int lun_begin, lun_end, ret;
-
-	ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev,
-						create.tgtname, create.tgttype,
-						&lun_begin, &lun_end);
-	if (ret != 6) {
-		pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n");
-		return -EINVAL;
-	}
-
-	create.flags = 0;
-	create.conf.type = NVM_CONFIG_TYPE_SIMPLE;
-	create.conf.s.lun_begin = lun_begin;
-	create.conf.s.lun_end = lun_end;
-
-	return __nvm_configure_create(&create);
-}
-
-
-/* Exposes administrative interface through /sys/module/lnvm/configure_by_str */
-static int nvm_configure_by_str_event(const char *val,
-					const struct kernel_param *kp)
-{
-	char opcode;
-	int ret;
-
-	ret = sscanf(val, "%c", &opcode);
-	if (ret != 1) {
-		pr_err("nvm: string must have the format of \"cmd ...\"\n");
-		return -EINVAL;
-	}
-
-	switch (opcode) {
-	case 'a':
-		return nvm_configure_create(val);
-	case 'd':
-		return nvm_configure_remove(val);
-	case 's':
-		return nvm_configure_show(val);
-	default:
-		pr_err("nvm: invalid command\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int nvm_configure_get(char *buf, const struct kernel_param *kp)
-{
-	int sz;
-	struct nvm_dev *dev;
-
-	sz = sprintf(buf, "available devices:\n");
-	down_write(&nvm_lock);
-	list_for_each_entry(dev, &nvm_devices, devices) {
-		if (sz > 4095 - DISK_NAME_LEN - 2)
-			break;
-		sz += sprintf(buf + sz, " %32s\n", dev->name);
-	}
-	up_write(&nvm_lock);
-
-	return sz;
-}
-
-static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = {
-	.set	= nvm_configure_by_str_event,
-	.get	= nvm_configure_get,
-};
-
-#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX	"lnvm."
-
-module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL,
-									0644);
-
-#endif /* CONFIG_NVM_DEBUG */
-
 static long nvm_ioctl_info(struct file *file, void __user *arg)
 {
 	struct nvm_ioctl_info *info;
-- 
2.7.4

[PATCH 07/20] lightnvm: cleanup unused target operations

[Javier González]

Cleanup definition leftovers from old gennvm interface

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 include/linux/lightnvm.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 6b26a32..e598308 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -477,9 +477,6 @@ typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
 typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
 					      struct nvm_lun *, unsigned long);
 typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
@@ -504,9 +501,6 @@ struct nvmm_type {
 	/* Block administration callbacks */
 	nvmm_get_blk_fn *get_blk;
 	nvmm_put_blk_fn *put_blk;
-	nvmm_open_blk_fn *open_blk;
-	nvmm_close_blk_fn *close_blk;
-	nvmm_flush_blk_fn *flush_blk;
 
 	nvmm_submit_io_fn *submit_io;
 	nvmm_erase_blk_fn *erase_blk;
-- 
2.7.4

[PATCH 08/20] lightnvm: make address conversion functions global

[Javier González]

Targets are assumed to used the same generic ppa format, where the
address is partitioned on ch:lun:block:pg:pl:sec. Thus, make the
function in charge of transforming the ppa address from a linear format
to the generic one available to all targets.

This function will be needed by the media manager in order to do target
mapping translations when targets are divided on different physical
partitions.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/rrpc.c  | 30 ------------------------------
 include/linux/lightnvm.h | 30 ++++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 60ca9d4..9253acc 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -136,36 +136,6 @@ static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 	return blk->id * rrpc->dev->sec_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->pgs_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;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index e598308..98278a9 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -361,6 +361,36 @@ struct nvm_dev {
 	spinlock_t lock;
 };
 
+static inline 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->pgs_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 inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
 						struct ppa_addr r)
 {
-- 
2.7.4

[PATCH 09/20] lightnvm: remove unnecessary variables in rrpc

[Javier González]

Before vectored I/Os were supported on rrpc, the physical address was
stored as part of the nvm_rqd request. This variable become obsolete
when the ppa_list was introduced. Cleanup this variable.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/rrpc.c | 6 ------
 drivers/lightnvm/rrpc.h | 3 ---
 2 files changed, 9 deletions(-)

diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 9253acc..34d2ebf 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -758,7 +758,6 @@ static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 static int rrpc_read_rq(struct rrpc *rrpc, struct bio *bio, struct nvm_rq *rqd,
 							unsigned long flags)
 {
-	struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd);
 	int is_gc = flags & NVM_IOTYPE_GC;
 	sector_t laddr = rrpc_get_laddr(bio);
 	struct rrpc_addr *gp;
@@ -778,7 +777,6 @@ static int rrpc_read_rq(struct rrpc *rrpc, struct bio *bio, struct nvm_rq *rqd,
 	}
 
 	rqd->opcode = NVM_OP_HBREAD;
-	rrqd->addr = gp;
 
 	return NVM_IO_OK;
 }
@@ -821,7 +819,6 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 static int rrpc_write_rq(struct rrpc *rrpc, struct bio *bio,
 				struct nvm_rq *rqd, unsigned long flags)
 {
-	struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd);
 	struct rrpc_addr *p;
 	int is_gc = flags & NVM_IOTYPE_GC;
 	sector_t laddr = rrpc_get_laddr(bio);
@@ -839,7 +836,6 @@ static int rrpc_write_rq(struct rrpc *rrpc, struct bio *bio,
 
 	rqd->ppa_addr = rrpc_ppa_to_gaddr(rrpc->dev, p->addr);
 	rqd->opcode = NVM_OP_HBWRITE;
-	rrqd->addr = p;
 
 	return NVM_IO_OK;
 }
@@ -1389,7 +1385,6 @@ static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
 	INIT_WORK(&rrpc->ws_requeue, rrpc_requeue);
 
 	rrpc->nr_luns = lun_end - lun_begin + 1;
-	rrpc->total_blocks = (unsigned long)dev->blks_per_lun * rrpc->nr_luns;
 	rrpc->nr_sects = (unsigned long long)dev->sec_per_lun * rrpc->nr_luns;
 
 	/* simple round-robin strategy */
@@ -1409,7 +1404,6 @@ static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
 	}
 
 	rrpc->poffset = dev->sec_per_lun * lun_begin;
-	rrpc->lun_offset = lun_begin;
 
 	ret = rrpc_core_init(rrpc);
 	if (ret) {
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index 5e87d52..bed49ba 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -48,7 +48,6 @@ struct rrpc_inflight_rq {
 
 struct rrpc_rq {
 	struct rrpc_inflight_rq inflight_rq;
-	struct rrpc_addr *addr;
 	unsigned long flags;
 };
 
@@ -92,14 +91,12 @@ struct rrpc {
 
 	sector_t soffset; /* logical sector offset */
 	u64 poffset; /* physical page offset */
-	int lun_offset;
 
 	int nr_luns;
 	struct rrpc_lun *luns;
 
 	/* calculated values */
 	unsigned long long nr_sects;
-	unsigned long total_blocks;
 
 	/* Write strategy variables. Move these into each for structure for each
 	 * strategy
-- 
2.7.4

[PATCH 10/20] lightnvm: use constant name instead of value

[Javier González]

There is a constant to refer to free blocks. Use it when marking bad
blocks instead of using a constant value

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/gennvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index e969e3a..aee5b72 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -279,7 +279,7 @@ static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
 	lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
 
 	for (i = 0; i < nr_blks; i++) {
-		if (blks[i] == 0)
+		if (blks[i] == NVM_BLK_T_FREE)
 			continue;
 
 		blk = &lun->vlun.blocks[i];
-- 
2.7.4

[PATCH 11/20] lightnvm: remove gen_lun abstraction

[Javier González]

The gen_lun abstraction in the generic media manager was conceived on
the assumption that a single target would instantiated on top of it.
This has complicated target design to implement multi-instances. Remove
this abstraction and move its logic to nvm_lun, which manages physical
lun geometry and operations.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/gennvm.c | 85 +++++++++++++++++++++++------------------------
 drivers/lightnvm/gennvm.h | 16 +--------
 include/linux/lightnvm.h  | 10 ++++++
 3 files changed, 53 insertions(+), 58 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index aee5b72..3572ebb 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -223,13 +223,13 @@ static void gen_put_area(struct nvm_dev *dev, sector_t begin)
 static void gen_blocks_free(struct nvm_dev *dev)
 {
 	struct gen_dev *gn = dev->mp;
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	int i;
 
 	gen_for_each_lun(gn, lun, i) {
-		if (!lun->vlun.blocks)
+		if (!lun->blocks)
 			break;
-		vfree(lun->vlun.blocks);
+		vfree(lun->blocks);
 	}
 }
 
@@ -242,24 +242,24 @@ static void gen_luns_free(struct nvm_dev *dev)
 
 static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
 {
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	int i;
 
-	gn->luns = kcalloc(dev->nr_luns, sizeof(struct gen_lun), GFP_KERNEL);
+	gn->luns = kcalloc(dev->nr_luns, sizeof(struct nvm_lun), GFP_KERNEL);
 	if (!gn->luns)
 		return -ENOMEM;
 
 	gen_for_each_lun(gn, lun, i) {
-		spin_lock_init(&lun->vlun.lock);
 		INIT_LIST_HEAD(&lun->free_list);
 		INIT_LIST_HEAD(&lun->used_list);
 		INIT_LIST_HEAD(&lun->bb_list);
 
-		lun->reserved_blocks = 2; /* for GC only */
-		lun->vlun.id = i;
-		lun->vlun.lun_id = i % dev->luns_per_chnl;
-		lun->vlun.chnl_id = i / dev->luns_per_chnl;
-		lun->vlun.nr_free_blocks = dev->blks_per_lun;
+		spin_lock_init(&lun->lock);
+
+		lun->id = i;
+		lun->lun_id = i % dev->luns_per_chnl;
+		lun->chnl_id = i / dev->luns_per_chnl;
+		lun->nr_free_blocks = dev->blks_per_lun;
 	}
 	return 0;
 }
@@ -268,7 +268,7 @@ static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
 							u8 *blks, int nr_blks)
 {
 	struct nvm_dev *dev = gn->dev;
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	struct nvm_block *blk;
 	int i;
 
@@ -282,9 +282,10 @@ static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
 		if (blks[i] == NVM_BLK_T_FREE)
 			continue;
 
-		blk = &lun->vlun.blocks[i];
+		blk = &lun->blocks[i];
 		list_move_tail(&blk->list, &lun->bb_list);
-		lun->vlun.nr_free_blocks--;
+		blk->state = NVM_BLK_ST_BAD;
+		lun->nr_free_blocks--;
 	}
 
 	return 0;
@@ -295,7 +296,7 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 	struct nvm_dev *dev = private;
 	struct gen_dev *gn = dev->mp;
 	u64 elba = slba + nlb;
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	struct nvm_block *blk;
 	u64 i;
 	int lun_id;
@@ -326,7 +327,7 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 		/* Calculate block offset into lun */
 		pba = pba - (dev->sec_per_lun * lun_id);
-		blk = &lun->vlun.blocks[div_u64(pba, dev->sec_per_blk)];
+		blk = &lun->blocks[div_u64(pba, dev->sec_per_blk)];
 
 		if (!blk->state) {
 			/* at this point, we don't know anything about the
@@ -335,7 +336,7 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 			 */
 			list_move_tail(&blk->list, &lun->used_list);
 			blk->state = NVM_BLK_ST_TGT;
-			lun->vlun.nr_free_blocks--;
+			lun->nr_free_blocks--;
 		}
 	}
 
@@ -344,7 +345,7 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 {
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	struct nvm_block *block;
 	sector_t lun_iter, blk_iter, cur_block_id = 0;
 	int ret, nr_blks;
@@ -356,19 +357,19 @@ static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 		return -ENOMEM;
 
 	gen_for_each_lun(gn, lun, lun_iter) {
-		lun->vlun.blocks = vzalloc(sizeof(struct nvm_block) *
+		lun->blocks = vzalloc(sizeof(struct nvm_block) *
 							dev->blks_per_lun);
-		if (!lun->vlun.blocks) {
+		if (!lun->blocks) {
 			kfree(blks);
 			return -ENOMEM;
 		}
 
 		for (blk_iter = 0; blk_iter < dev->blks_per_lun; blk_iter++) {
-			block = &lun->vlun.blocks[blk_iter];
+			block = &lun->blocks[blk_iter];
 
 			INIT_LIST_HEAD(&block->list);
 
-			block->lun = &lun->vlun;
+			block->lun = lun;
 			block->id = cur_block_id++;
 
 			list_add_tail(&block->list, &lun->free_list);
@@ -378,8 +379,8 @@ static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 			struct ppa_addr ppa;
 
 			ppa.ppa = 0;
-			ppa.g.ch = lun->vlun.chnl_id;
-			ppa.g.lun = lun->vlun.lun_id;
+			ppa.g.ch = lun->chnl_id;
+			ppa.g.lun = lun->lun_id;
 
 			ret = nvm_get_bb_tbl(dev, ppa, blks);
 			if (ret)
@@ -468,41 +469,39 @@ static void gen_unregister(struct nvm_dev *dev)
 }
 
 static struct nvm_block *gen_get_blk(struct nvm_dev *dev,
-				struct nvm_lun *vlun, unsigned long flags)
+				struct nvm_lun *lun, unsigned long flags)
 {
-	struct gen_lun *lun = container_of(vlun, struct gen_lun, vlun);
 	struct nvm_block *blk = NULL;
 	int is_gc = flags & NVM_IOTYPE_GC;
 
-	spin_lock(&vlun->lock);
+	spin_lock(&lun->lock);
 	if (list_empty(&lun->free_list)) {
 		pr_err_ratelimited("gen: lun %u have no free pages available",
-								lun->vlun.id);
+								lun->id);
 		goto out;
 	}
 
-	if (!is_gc && lun->vlun.nr_free_blocks < lun->reserved_blocks)
+	if (!is_gc && lun->nr_free_blocks < lun->reserved_blocks)
 		goto out;
 
 	blk = list_first_entry(&lun->free_list, struct nvm_block, list);
 
 	list_move_tail(&blk->list, &lun->used_list);
 	blk->state = NVM_BLK_ST_TGT;
-	lun->vlun.nr_free_blocks--;
+	lun->nr_free_blocks--;
 out:
-	spin_unlock(&vlun->lock);
+	spin_unlock(&lun->lock);
 	return blk;
 }
 
 static void gen_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
 {
-	struct nvm_lun *vlun = blk->lun;
-	struct gen_lun *lun = container_of(vlun, struct gen_lun, vlun);
+	struct nvm_lun *lun = blk->lun;
 
-	spin_lock(&vlun->lock);
+	spin_lock(&lun->lock);
 	if (blk->state & NVM_BLK_ST_TGT) {
 		list_move_tail(&blk->list, &lun->free_list);
-		lun->vlun.nr_free_blocks++;
+		lun->nr_free_blocks++;
 		blk->state = NVM_BLK_ST_FREE;
 	} else if (blk->state & NVM_BLK_ST_BAD) {
 		list_move_tail(&blk->list, &lun->bb_list);
@@ -513,13 +512,13 @@ static void gen_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
 							blk->id, blk->state);
 		list_move_tail(&blk->list, &lun->bb_list);
 	}
-	spin_unlock(&vlun->lock);
+	spin_unlock(&lun->lock);
 }
 
 static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 {
 	struct gen_dev *gn = dev->mp;
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	struct nvm_block *blk;
 
 	pr_debug("gen: ppa  (ch: %u lun: %u blk: %u pg: %u) -> %u\n",
@@ -537,7 +536,7 @@ static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 	}
 
 	lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
-	blk = &lun->vlun.blocks[ppa.g.blk];
+	blk = &lun->blocks[ppa.g.blk];
 
 	/* will be moved to bb list on put_blk from target */
 	blk->state = type;
@@ -587,23 +586,23 @@ static struct nvm_lun *gen_get_lun(struct nvm_dev *dev, int lunid)
 	if (unlikely(lunid >= dev->nr_luns))
 		return NULL;
 
-	return &gn->luns[lunid].vlun;
+	return &gn->luns[lunid];
 }
 
 static void gen_lun_info_print(struct nvm_dev *dev)
 {
 	struct gen_dev *gn = dev->mp;
-	struct gen_lun *lun;
+	struct nvm_lun *lun;
 	unsigned int i;
 
 
 	gen_for_each_lun(gn, lun, i) {
-		spin_lock(&lun->vlun.lock);
+		spin_lock(&lun->lock);
 
 		pr_info("%s: lun%8u\t%u\n", dev->name, i,
-						lun->vlun.nr_free_blocks);
+						lun->nr_free_blocks);
 
-		spin_unlock(&lun->vlun.lock);
+		spin_unlock(&lun->lock);
 	}
 }
 
diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h
index 8ecfa81..d167f39 100644
--- a/drivers/lightnvm/gennvm.h
+++ b/drivers/lightnvm/gennvm.h
@@ -20,25 +20,11 @@
 
 #include <linux/lightnvm.h>
 
-struct gen_lun {
-	struct nvm_lun vlun;
-
-	int reserved_blocks;
-	/* lun block lists */
-	struct list_head used_list;	/* In-use blocks */
-	struct list_head free_list;	/* Not used blocks i.e. released
-					 * and ready for use
-					 */
-	struct list_head bb_list;	/* Bad blocks. Mutually exclusive with
-					 * free_list and used_list
-					 */
-};
-
 struct gen_dev {
 	struct nvm_dev *dev;
 
 	int nr_luns;
-	struct gen_lun *luns;
+	struct nvm_lun *luns;
 	struct list_head area_list;
 
 	struct mutex lock;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 98278a9..33940bd 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -275,7 +275,17 @@ struct nvm_lun {
 
 	spinlock_t lock;
 
+	/* lun block lists */
+	struct list_head used_list;	/* In-use blocks */
+	struct list_head free_list;	/* Not used blocks i.e. released
+					 * and ready for use
+					 */
+	struct list_head bb_list;	/* Bad blocks. Mutually exclusive with
+					 * free_list and used_list
+					 */
 	unsigned int nr_free_blocks;	/* Number of unused blocks */
+	int reserved_blocks;
+
 	struct nvm_block *blocks;
 };
 
-- 
2.7.4

[PATCH 12/20] lightnvm: manage lun partitions internally in mm

[Javier González]

LUNs are exclusively owned by targets implementing a block device FTL.
Doing this reservation requires at the moment a 2-way callback gennvm
<-> target. The reason behind this is that LUNs were not assumed to
always be exclusively owned by targets. However, this design decision
goes against I/O determinism QoS (two targets would mix I/O on the same
parallel unit in the device).

This patch makes LUN reservation as part of the target creation on the
media manager. This makes that LUNs are always exclusively owned by the
target instantiated on top of them. LUN stripping and/or sharing should
be implemented on the target itself or the layers on top.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/gennvm.c | 62 +++++++++++++++++++++++++++++++++++++----------
 drivers/lightnvm/rrpc.c   |  7 ------
 include/linux/lightnvm.h  |  6 ++---
 3 files changed, 51 insertions(+), 24 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 3572ebb..9671e11 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -35,6 +35,45 @@ static const struct block_device_operations gen_fops = {
 	.owner		= THIS_MODULE,
 };
 
+static int gen_reserve_luns(struct nvm_dev *dev, struct nvm_target *t,
+			    int lun_begin, int lun_end)
+{
+	struct gen_dev *gn = dev->mp;
+	struct nvm_lun *lun;
+	int i;
+
+	for (i = lun_begin; i <= lun_end; i++) {
+		if (test_and_set_bit(i, dev->lun_map)) {
+			pr_err("nvm: lun %d already allocated\n", i);
+			goto err;
+		}
+
+		lun = &gn->luns[i];
+		list_add_tail(&lun->list, &t->lun_list);
+	}
+
+	return 0;
+
+err:
+	while (--i > lun_begin) {
+		lun = &gn->luns[i];
+		clear_bit(i, dev->lun_map);
+		list_del(&lun->list);
+	}
+
+	return -EBUSY;
+}
+
+static void gen_release_luns(struct nvm_dev *dev, struct nvm_target *t)
+{
+	struct nvm_lun *lun, *tmp;
+
+	list_for_each_entry_safe(lun, tmp, &t->lun_list, list) {
+		WARN_ON(!test_and_clear_bit(lun->id, dev->lun_map));
+		list_del(&lun->list);
+	}
+}
+
 static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 {
 	struct gen_dev *gn = dev->mp;
@@ -64,9 +103,14 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	if (!t)
 		return -ENOMEM;
 
+	INIT_LIST_HEAD(&t->lun_list);
+
+	if (gen_reserve_luns(dev, t, s->lun_begin, s->lun_end))
+		goto err_t;
+
 	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
 	if (!tqueue)
-		goto err_t;
+		goto err_reserve;
 	blk_queue_make_request(tqueue, tt->make_rq);
 
 	tdisk = alloc_disk(0);
@@ -105,6 +149,8 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	put_disk(tdisk);
 err_queue:
 	blk_cleanup_queue(tqueue);
+err_reserve:
+	gen_release_luns(dev, t);
 err_t:
 	kfree(t);
 	return -ENOMEM;
@@ -122,6 +168,7 @@ static void __gen_remove_target(struct nvm_target *t)
 	if (tt->exit)
 		tt->exit(tdisk->private_data);
 
+	gen_release_luns(t->dev, t);
 	put_disk(tdisk);
 
 	list_del(&t->list);
@@ -253,6 +300,7 @@ static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
 		INIT_LIST_HEAD(&lun->free_list);
 		INIT_LIST_HEAD(&lun->used_list);
 		INIT_LIST_HEAD(&lun->bb_list);
+		INIT_LIST_HEAD(&lun->list);
 
 		spin_lock_init(&lun->lock);
 
@@ -569,16 +617,6 @@ static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
 	return nvm_erase_ppa(dev, &addr, 1, flags);
 }
 
-static int gen_reserve_lun(struct nvm_dev *dev, int lunid)
-{
-	return test_and_set_bit(lunid, dev->lun_map);
-}
-
-static void gen_release_lun(struct nvm_dev *dev, int lunid)
-{
-	WARN_ON(!test_and_clear_bit(lunid, dev->lun_map));
-}
-
 static struct nvm_lun *gen_get_lun(struct nvm_dev *dev, int lunid)
 {
 	struct gen_dev *gn = dev->mp;
@@ -625,8 +663,6 @@ static struct nvmm_type gen = {
 	.mark_blk		= gen_mark_blk,
 
 	.get_lun		= gen_get_lun,
-	.reserve_lun		= gen_reserve_lun,
-	.release_lun		= gen_release_lun,
 	.lun_info_print		= gen_lun_info_print,
 
 	.get_area		= gen_get_area,
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 34d2ebf..88e0d06 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -1126,7 +1126,6 @@ static void rrpc_core_free(struct rrpc *rrpc)
 
 static void rrpc_luns_free(struct rrpc *rrpc)
 {
-	struct nvm_dev *dev = rrpc->dev;
 	struct nvm_lun *lun;
 	struct rrpc_lun *rlun;
 	int i;
@@ -1139,7 +1138,6 @@ static void rrpc_luns_free(struct rrpc *rrpc)
 		lun = rlun->parent;
 		if (!lun)
 			break;
-		dev->mt->release_lun(dev, lun->id);
 		vfree(rlun->blocks);
 	}
 
@@ -1169,11 +1167,6 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 		int lunid = lun_begin + i;
 		struct nvm_lun *lun;
 
-		if (dev->mt->reserve_lun(dev, lunid)) {
-			pr_err("rrpc: lun %u is already allocated\n", lunid);
-			goto err;
-		}
-
 		lun = dev->mt->get_lun(dev, lunid);
 		if (!lun)
 			goto err;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 33940bd..89c6954 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -210,6 +210,7 @@ struct nvm_id {
 
 struct nvm_target {
 	struct list_head list;
+	struct list_head lun_list;
 	struct nvm_dev *dev;
 	struct nvm_tgt_type *type;
 	struct gendisk *disk;
@@ -273,6 +274,7 @@ struct nvm_lun {
 	int lun_id;
 	int chnl_id;
 
+	struct list_head list;
 	spinlock_t lock;
 
 	/* lun block lists */
@@ -521,8 +523,6 @@ typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
 typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
-typedef int (nvmm_reserve_lun)(struct nvm_dev *, int);
-typedef void (nvmm_release_lun)(struct nvm_dev *, int);
 typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
 
 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
@@ -550,8 +550,6 @@ struct nvmm_type {
 
 	/* Configuration management */
 	nvmm_get_lun_fn *get_lun;
-	nvmm_reserve_lun *reserve_lun;
-	nvmm_release_lun *release_lun;
 
 	/* Statistics */
 	nvmm_lun_info_print_fn *lun_info_print;
-- 
2.7.4

[PATCH 13/20] lightnvm: move block provisioning to targets

[Javier González]

In order to naturally support multi-target instances on an Open-Channel
SSD, targets should own the LUNs they get blocks from and manage
provisioning internally. This is done in several steps.

This patch moves the block provisioning inside of the target and removes
the get/put block interface from the media manager.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c      |  95 ++++++++++-----------
 drivers/lightnvm/gennvm.c    | 145 +++++++++++++++-----------------
 drivers/lightnvm/rrpc.c      | 196 ++++++++++++++++++++++++++++---------------
 drivers/lightnvm/rrpc.h      |  15 +++-
 drivers/lightnvm/sysblk.c    |  65 +++++++-------
 drivers/nvme/host/lightnvm.c |  11 ++-
 include/linux/lightnvm.h     | 133 +++++++++++++++--------------
 7 files changed, 370 insertions(+), 290 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index d4433d3..493ce03 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -176,20 +176,6 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name)
 	return NULL;
 }
 
-struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun,
-							unsigned long flags)
-{
-	return dev->mt->get_blk(dev, lun, flags);
-}
-EXPORT_SYMBOL(nvm_get_blk);
-
-/* Assumes that all valid pages have already been moved on release to bm */
-void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
-{
-	return dev->mt->put_blk(dev, blk);
-}
-EXPORT_SYMBOL(nvm_put_blk);
-
 void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 {
 	return dev->mt->mark_blk(dev, ppa, type);
@@ -266,10 +252,11 @@ EXPORT_SYMBOL(nvm_generic_to_addr_mode);
 int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
 			const struct ppa_addr *ppas, int nr_ppas, int vblk)
 {
+	struct nvm_geo *geo = &dev->geo;
 	int i, plane_cnt, pl_idx;
 	struct ppa_addr ppa;
 
-	if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
+	if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
 		rqd->nr_ppas = nr_ppas;
 		rqd->ppa_addr = ppas[0];
 
@@ -287,7 +274,7 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
 		for (i = 0; i < nr_ppas; i++)
 			rqd->ppa_list[i] = ppas[i];
 	} else {
-		plane_cnt = dev->plane_mode;
+		plane_cnt = geo->plane_mode;
 		rqd->nr_ppas *= plane_cnt;
 
 		for (i = 0; i < nr_ppas; i++) {
@@ -465,17 +452,18 @@ EXPORT_SYMBOL(nvm_submit_ppa);
  */
 int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
 {
+	struct nvm_geo *geo = &dev->geo;
 	int blk, offset, pl, blktype;
 
-	if (nr_blks != dev->blks_per_lun * dev->plane_mode)
+	if (nr_blks != geo->blks_per_lun * geo->plane_mode)
 		return -EINVAL;
 
-	for (blk = 0; blk < dev->blks_per_lun; blk++) {
-		offset = blk * dev->plane_mode;
+	for (blk = 0; blk < geo->blks_per_lun; blk++) {
+		offset = blk * geo->plane_mode;
 		blktype = blks[offset];
 
 		/* Bad blocks on any planes take precedence over other types */
-		for (pl = 0; pl < dev->plane_mode; pl++) {
+		for (pl = 0; pl < geo->plane_mode; pl++) {
 			if (blks[offset + pl] &
 					(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
 				blktype = blks[offset + pl];
@@ -486,7 +474,7 @@ int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
 		blks[blk] = blktype;
 	}
 
-	return dev->blks_per_lun;
+	return geo->blks_per_lun;
 }
 EXPORT_SYMBOL(nvm_bb_tbl_fold);
 
@@ -500,9 +488,10 @@ EXPORT_SYMBOL(nvm_get_bb_tbl);
 
 static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
 {
+	struct nvm_geo *geo = &dev->geo;
 	int i;
 
-	dev->lps_per_blk = dev->pgs_per_blk;
+	dev->lps_per_blk = geo->pgs_per_blk;
 	dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
 	if (!dev->lptbl)
 		return -ENOMEM;
@@ -548,29 +537,32 @@ static int nvm_core_init(struct nvm_dev *dev)
 {
 	struct nvm_id *id = &dev->identity;
 	struct nvm_id_group *grp = &id->groups[0];
+	struct nvm_geo *geo = &dev->geo;
 	int ret;
 
-	/* device values */
-	dev->nr_chnls = grp->num_ch;
-	dev->luns_per_chnl = grp->num_lun;
-	dev->pgs_per_blk = grp->num_pg;
-	dev->blks_per_lun = grp->num_blk;
-	dev->nr_planes = grp->num_pln;
-	dev->fpg_size = grp->fpg_sz;
-	dev->pfpg_size = grp->fpg_sz * grp->num_pln;
-	dev->sec_size = grp->csecs;
-	dev->oob_size = grp->sos;
-	dev->sec_per_pg = grp->fpg_sz / grp->csecs;
-	dev->mccap = grp->mccap;
-	memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
+	/* Whole device values */
+	geo->nr_chnls = grp->num_ch;
+	geo->luns_per_chnl = grp->num_lun;
 
-	dev->plane_mode = NVM_PLANE_SINGLE;
-	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
+	/* Generic device values */
+	geo->pgs_per_blk = grp->num_pg;
+	geo->blks_per_lun = grp->num_blk;
+	geo->nr_planes = grp->num_pln;
+	geo->fpg_size = grp->fpg_sz;
+	geo->pfpg_size = grp->fpg_sz * grp->num_pln;
+	geo->sec_size = grp->csecs;
+	geo->oob_size = grp->sos;
+	geo->sec_per_pg = grp->fpg_sz / grp->csecs;
+	geo->mccap = grp->mccap;
+	memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
+
+	geo->plane_mode = NVM_PLANE_SINGLE;
+	geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size;
 
 	if (grp->mpos & 0x020202)
-		dev->plane_mode = NVM_PLANE_DOUBLE;
+		geo->plane_mode = NVM_PLANE_DOUBLE;
 	if (grp->mpos & 0x040404)
-		dev->plane_mode = NVM_PLANE_QUAD;
+		geo->plane_mode = NVM_PLANE_QUAD;
 
 	if (grp->mtype != 0) {
 		pr_err("nvm: memory type not supported\n");
@@ -578,13 +570,13 @@ static int nvm_core_init(struct nvm_dev *dev)
 	}
 
 	/* calculated values */
-	dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes;
-	dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk;
-	dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
-	dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
+	geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes;
+	geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk;
+	geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun;
+	geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls;
 
-	dev->total_secs = dev->nr_luns * dev->sec_per_lun;
-	dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns),
+	dev->total_secs = geo->nr_luns * geo->sec_per_lun;
+	dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns),
 					sizeof(unsigned long), GFP_KERNEL);
 	if (!dev->lun_map)
 		return -ENOMEM;
@@ -611,7 +603,7 @@ static int nvm_core_init(struct nvm_dev *dev)
 	mutex_init(&dev->mlock);
 	spin_lock_init(&dev->lock);
 
-	blk_queue_logical_block_size(dev->q, dev->sec_size);
+	blk_queue_logical_block_size(dev->q, geo->sec_size);
 
 	return 0;
 err_fmtype:
@@ -645,6 +637,7 @@ void nvm_free(struct nvm_dev *dev)
 
 static int nvm_init(struct nvm_dev *dev)
 {
+	struct nvm_geo *geo = &dev->geo;
 	int ret = -EINVAL;
 
 	if (!dev->q || !dev->ops)
@@ -676,9 +669,9 @@ static int nvm_init(struct nvm_dev *dev)
 	}
 
 	pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
-			dev->name, dev->sec_per_pg, dev->nr_planes,
-			dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns,
-			dev->nr_chnls);
+			dev->name, geo->sec_per_pg, geo->nr_planes,
+			geo->pgs_per_blk, geo->blks_per_lun,
+			geo->nr_luns, geo->nr_chnls);
 	return 0;
 err:
 	pr_err("nvm: failed to initialize nvm\n");
@@ -771,9 +764,9 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
 	}
 	s = &create->conf.s;
 
-	if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) {
+	if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) {
 		pr_err("nvm: lun out of bound (%u:%u > %u)\n",
-			s->lun_begin, s->lun_end, dev->nr_luns);
+			s->lun_begin, s->lun_end, dev->geo.nr_luns);
 		return -EINVAL;
 	}
 
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 9671e11..8791a2a 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -74,6 +74,36 @@ static void gen_release_luns(struct nvm_dev *dev, struct nvm_target *t)
 	}
 }
 
+static void gen_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev)
+{
+	kfree(tgt_dev);
+}
+
+static struct nvm_tgt_dev *gen_create_tgt_dev(struct nvm_dev *dev,
+					      int lun_begin, int lun_end)
+{
+	struct nvm_tgt_dev *tgt_dev = NULL;
+	int nr_luns = lun_end - lun_begin + 1;
+
+	tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
+	if (!tgt_dev)
+		goto out;
+
+	memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
+	tgt_dev->geo.nr_chnls = (nr_luns / (dev->geo.luns_per_chnl + 1)) + 1;
+	tgt_dev->geo.nr_luns = nr_luns;
+	tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
+	tgt_dev->q = dev->q;
+	tgt_dev->ops = dev->ops;
+	tgt_dev->mt = dev->mt;
+	memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
+
+	tgt_dev->parent = dev;
+
+out:
+	return tgt_dev;
+}
+
 static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 {
 	struct gen_dev *gn = dev->mp;
@@ -82,6 +112,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	struct gendisk *tdisk;
 	struct nvm_tgt_type *tt;
 	struct nvm_target *t;
+	struct nvm_tgt_dev *tgt_dev;
 	void *targetdata;
 
 	tt = nvm_find_target_type(create->tgttype, 1);
@@ -108,9 +139,13 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	if (gen_reserve_luns(dev, t, s->lun_begin, s->lun_end))
 		goto err_t;
 
+	tgt_dev = gen_create_tgt_dev(dev, s->lun_begin, s->lun_end);
+	if (!tgt_dev)
+		goto err_reserve;
+
 	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
 	if (!tqueue)
-		goto err_reserve;
+		goto err_dev;
 	blk_queue_make_request(tqueue, tt->make_rq);
 
 	tdisk = alloc_disk(0);
@@ -124,7 +159,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	tdisk->fops = &gen_fops;
 	tdisk->queue = tqueue;
 
-	targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end);
+	targetdata = tt->init(tgt_dev, tdisk, s->lun_begin, s->lun_end);
 	if (IS_ERR(targetdata))
 		goto err_init;
 
@@ -138,7 +173,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 
 	t->type = tt;
 	t->disk = tdisk;
-	t->dev = dev;
+	t->dev = tgt_dev;
 
 	mutex_lock(&gn->lock);
 	list_add_tail(&t->list, &gn->targets);
@@ -149,6 +184,8 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	put_disk(tdisk);
 err_queue:
 	blk_cleanup_queue(tqueue);
+err_dev:
+	kfree(tgt_dev);
 err_reserve:
 	gen_release_luns(dev, t);
 err_t:
@@ -168,7 +205,8 @@ static void __gen_remove_target(struct nvm_target *t)
 	if (tt->exit)
 		tt->exit(tdisk->private_data);
 
-	gen_release_luns(t->dev, t);
+	gen_release_luns(t->dev->parent, t);
+	gen_remove_tgt_dev(t->dev);
 	put_disk(tdisk);
 
 	list_del(&t->list);
@@ -207,10 +245,11 @@ static int gen_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove)
 
 static int gen_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct gen_dev *gn = dev->mp;
 	struct gen_area *area, *prev, *next;
 	sector_t begin = 0;
-	sector_t max_sectors = (dev->sec_size * dev->total_secs) >> 9;
+	sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9;
 
 	if (len > max_sectors)
 		return -EINVAL;
@@ -289,10 +328,11 @@ static void gen_luns_free(struct nvm_dev *dev)
 
 static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct nvm_lun *lun;
 	int i;
 
-	gn->luns = kcalloc(dev->nr_luns, sizeof(struct nvm_lun), GFP_KERNEL);
+	gn->luns = kcalloc(geo->nr_luns, sizeof(struct nvm_lun), GFP_KERNEL);
 	if (!gn->luns)
 		return -ENOMEM;
 
@@ -305,9 +345,9 @@ static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
 		spin_lock_init(&lun->lock);
 
 		lun->id = i;
-		lun->lun_id = i % dev->luns_per_chnl;
-		lun->chnl_id = i / dev->luns_per_chnl;
-		lun->nr_free_blocks = dev->blks_per_lun;
+		lun->lun_id = i % geo->luns_per_chnl;
+		lun->chnl_id = i / geo->luns_per_chnl;
+		lun->nr_free_blocks = geo->blks_per_lun;
 	}
 	return 0;
 }
@@ -324,7 +364,7 @@ static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
 	if (nr_blks < 0)
 		return nr_blks;
 
-	lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
+	lun = &gn->luns[(dev->geo.luns_per_chnl * ppa.g.ch) + ppa.g.lun];
 
 	for (i = 0; i < nr_blks; i++) {
 		if (blks[i] == NVM_BLK_T_FREE)
@@ -342,6 +382,7 @@ static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
 static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 {
 	struct nvm_dev *dev = private;
+	struct nvm_geo *geo = &dev->geo;
 	struct gen_dev *gn = dev->mp;
 	u64 elba = slba + nlb;
 	struct nvm_lun *lun;
@@ -370,12 +411,12 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 			continue;
 
 		/* resolve block from physical address */
-		lun_id = div_u64(pba, dev->sec_per_lun);
+		lun_id = div_u64(pba, geo->sec_per_lun);
 		lun = &gn->luns[lun_id];
 
 		/* Calculate block offset into lun */
-		pba = pba - (dev->sec_per_lun * lun_id);
-		blk = &lun->blocks[div_u64(pba, dev->sec_per_blk)];
+		pba = pba - (geo->sec_per_lun * lun_id);
+		blk = &lun->blocks[div_u64(pba, geo->sec_per_blk)];
 
 		if (!blk->state) {
 			/* at this point, we don't know anything about the
@@ -393,26 +434,27 @@ static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct nvm_lun *lun;
 	struct nvm_block *block;
 	sector_t lun_iter, blk_iter, cur_block_id = 0;
 	int ret, nr_blks;
 	u8 *blks;
 
-	nr_blks = dev->blks_per_lun * dev->plane_mode;
+	nr_blks = geo->blks_per_lun * geo->plane_mode;
 	blks = kmalloc(nr_blks, GFP_KERNEL);
 	if (!blks)
 		return -ENOMEM;
 
 	gen_for_each_lun(gn, lun, lun_iter) {
 		lun->blocks = vzalloc(sizeof(struct nvm_block) *
-							dev->blks_per_lun);
+							geo->blks_per_lun);
 		if (!lun->blocks) {
 			kfree(blks);
 			return -ENOMEM;
 		}
 
-		for (blk_iter = 0; blk_iter < dev->blks_per_lun; blk_iter++) {
+		for (blk_iter = 0; blk_iter < geo->blks_per_lun; blk_iter++) {
 			block = &lun->blocks[blk_iter];
 
 			INIT_LIST_HEAD(&block->list);
@@ -474,7 +516,7 @@ static int gen_register(struct nvm_dev *dev)
 		return -ENOMEM;
 
 	gn->dev = dev;
-	gn->nr_luns = dev->nr_luns;
+	gn->nr_luns = dev->geo.nr_luns;
 	INIT_LIST_HEAD(&gn->area_list);
 	mutex_init(&gn->lock);
 	INIT_LIST_HEAD(&gn->targets);
@@ -506,7 +548,7 @@ static void gen_unregister(struct nvm_dev *dev)
 
 	mutex_lock(&gn->lock);
 	list_for_each_entry_safe(t, tmp, &gn->targets, list) {
-		if (t->dev != dev)
+		if (t->dev->parent != dev)
 			continue;
 		__gen_remove_target(t);
 	}
@@ -516,55 +558,9 @@ static void gen_unregister(struct nvm_dev *dev)
 	module_put(THIS_MODULE);
 }
 
-static struct nvm_block *gen_get_blk(struct nvm_dev *dev,
-				struct nvm_lun *lun, unsigned long flags)
-{
-	struct nvm_block *blk = NULL;
-	int is_gc = flags & NVM_IOTYPE_GC;
-
-	spin_lock(&lun->lock);
-	if (list_empty(&lun->free_list)) {
-		pr_err_ratelimited("gen: lun %u have no free pages available",
-								lun->id);
-		goto out;
-	}
-
-	if (!is_gc && lun->nr_free_blocks < lun->reserved_blocks)
-		goto out;
-
-	blk = list_first_entry(&lun->free_list, struct nvm_block, list);
-
-	list_move_tail(&blk->list, &lun->used_list);
-	blk->state = NVM_BLK_ST_TGT;
-	lun->nr_free_blocks--;
-out:
-	spin_unlock(&lun->lock);
-	return blk;
-}
-
-static void gen_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
-{
-	struct nvm_lun *lun = blk->lun;
-
-	spin_lock(&lun->lock);
-	if (blk->state & NVM_BLK_ST_TGT) {
-		list_move_tail(&blk->list, &lun->free_list);
-		lun->nr_free_blocks++;
-		blk->state = NVM_BLK_ST_FREE;
-	} else if (blk->state & NVM_BLK_ST_BAD) {
-		list_move_tail(&blk->list, &lun->bb_list);
-		blk->state = NVM_BLK_ST_BAD;
-	} else {
-		WARN_ON_ONCE(1);
-		pr_err("gen: erroneous block type (%lu -> %u)\n",
-							blk->id, blk->state);
-		list_move_tail(&blk->list, &lun->bb_list);
-	}
-	spin_unlock(&lun->lock);
-}
-
 static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct gen_dev *gn = dev->mp;
 	struct nvm_lun *lun;
 	struct nvm_block *blk;
@@ -572,18 +568,18 @@ static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
 	pr_debug("gen: ppa  (ch: %u lun: %u blk: %u pg: %u) -> %u\n",
 			ppa.g.ch, ppa.g.lun, ppa.g.blk, ppa.g.pg, type);
 
-	if (unlikely(ppa.g.ch > dev->nr_chnls ||
-					ppa.g.lun > dev->luns_per_chnl ||
-					ppa.g.blk > dev->blks_per_lun)) {
+	if (unlikely(ppa.g.ch > geo->nr_chnls ||
+					ppa.g.lun > geo->luns_per_chnl ||
+					ppa.g.blk > geo->blks_per_lun)) {
 		WARN_ON_ONCE(1);
 		pr_err("gen: ppa broken (ch: %u > %u lun: %u > %u blk: %u > %u",
-				ppa.g.ch, dev->nr_chnls,
-				ppa.g.lun, dev->luns_per_chnl,
-				ppa.g.blk, dev->blks_per_lun);
+				ppa.g.ch, geo->nr_chnls,
+				ppa.g.lun, geo->luns_per_chnl,
+				ppa.g.blk, geo->blks_per_lun);
 		return;
 	}
 
-	lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
+	lun = &gn->luns[(geo->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
 	blk = &lun->blocks[ppa.g.blk];
 
 	/* will be moved to bb list on put_blk from target */
@@ -621,7 +617,7 @@ static struct nvm_lun *gen_get_lun(struct nvm_dev *dev, int lunid)
 {
 	struct gen_dev *gn = dev->mp;
 
-	if (unlikely(lunid >= dev->nr_luns))
+	if (unlikely(lunid >= dev->geo.nr_luns))
 		return NULL;
 
 	return &gn->luns[lunid];
@@ -654,9 +650,6 @@ static struct nvmm_type gen = {
 	.create_tgt		= gen_create_tgt,
 	.remove_tgt		= gen_remove_tgt,
 
-	.get_blk		= gen_get_blk,
-	.put_blk		= gen_put_blk,
-
 	.submit_io		= gen_submit_io,
 	.erase_blk		= gen_erase_blk,
 
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 88e0d06..5377c7a 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -28,6 +28,7 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 
 static void rrpc_page_invalidate(struct rrpc *rrpc, struct rrpc_addr *a)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_block *rblk = a->rblk;
 	unsigned int pg_offset;
 
@@ -38,7 +39,7 @@ static void rrpc_page_invalidate(struct rrpc *rrpc, struct rrpc_addr *a)
 
 	spin_lock(&rblk->lock);
 
-	div_u64_rem(a->addr, rrpc->dev->sec_per_blk, &pg_offset);
+	div_u64_rem(a->addr, dev->geo.sec_per_blk, &pg_offset);
 	WARN_ON(test_and_set_bit(pg_offset, rblk->invalid_pages));
 	rblk->nr_invalid_pages++;
 
@@ -116,32 +117,36 @@ static void rrpc_discard(struct rrpc *rrpc, struct bio *bio)
 
 static int block_is_full(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	return (rblk->next_page == rrpc->dev->sec_per_blk);
+	struct nvm_tgt_dev *dev = rrpc->dev;
+
+	return (rblk->next_page == dev->geo.sec_per_blk);
 }
 
 /* Calculate relative addr for the given block, considering instantiated LUNs */
 static u64 block_to_rel_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_block *blk = rblk->parent;
-	int lun_blk = blk->id % (rrpc->dev->blks_per_lun * rrpc->nr_luns);
+	int lun_blk = blk->id % (dev->geo.blks_per_lun * rrpc->nr_luns);
 
-	return lun_blk * rrpc->dev->sec_per_blk;
+	return lun_blk * dev->geo.sec_per_blk;
 }
 
 /* Calculate global addr for the given block */
 static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_block *blk = rblk->parent;
 
-	return blk->id * rrpc->dev->sec_per_blk;
+	return blk->id * dev->geo.sec_per_blk;
 }
 
-static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_dev *dev, u64 addr)
+static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_tgt_dev *dev, u64 addr)
 {
 	struct ppa_addr paddr;
 
 	paddr.ppa = addr;
-	return linear_to_generic_addr(dev, paddr);
+	return linear_to_generic_addr(&dev->geo, paddr);
 }
 
 /* requires lun->lock taken */
@@ -158,21 +163,52 @@ static void rrpc_set_lun_cur(struct rrpc_lun *rlun, struct rrpc_block *new_rblk,
 	*cur_rblk = new_rblk;
 }
 
+static struct nvm_block *__rrpc_get_blk(struct rrpc *rrpc,
+							struct rrpc_lun *rlun)
+{
+	struct nvm_lun *lun = rlun->parent;
+	struct nvm_block *blk = NULL;
+
+	if (list_empty(&lun->free_list))
+		goto out;
+
+	blk = list_first_entry(&lun->free_list, struct nvm_block, list);
+
+	list_move_tail(&blk->list, &lun->used_list);
+	blk->state = NVM_BLK_ST_TGT;
+	lun->nr_free_blocks--;
+
+out:
+	return blk;
+}
+
 static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 							unsigned long flags)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
+	struct nvm_lun *lun = rlun->parent;
 	struct nvm_block *blk;
 	struct rrpc_block *rblk;
+	int is_gc = flags & NVM_IOTYPE_GC;
 
-	blk = nvm_get_blk(rrpc->dev, rlun->parent, flags);
+	spin_lock(&rlun->lock);
+	if (!is_gc && lun->nr_free_blocks < rlun->reserved_blocks) {
+		pr_err("nvm: rrpc: cannot give block to non GC request\n");
+		spin_unlock(&rlun->lock);
+		return NULL;
+	}
+
+	blk = __rrpc_get_blk(rrpc, rlun);
 	if (!blk) {
-		pr_err("nvm: rrpc: cannot get new block from media manager\n");
+		pr_err("nvm: rrpc: cannot get new block\n");
+		spin_unlock(&rlun->lock);
 		return NULL;
 	}
+	spin_unlock(&rlun->lock);
 
 	rblk = rrpc_get_rblk(rlun, blk->id);
 	blk->priv = rblk;
-	bitmap_zero(rblk->invalid_pages, rrpc->dev->sec_per_blk);
+	bitmap_zero(rblk->invalid_pages, dev->geo.sec_per_blk);
 	rblk->next_page = 0;
 	rblk->nr_invalid_pages = 0;
 	atomic_set(&rblk->data_cmnt_size, 0);
@@ -182,7 +218,25 @@ static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 
 static void rrpc_put_blk(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	nvm_put_blk(rrpc->dev, rblk->parent);
+	struct nvm_block *blk = rblk->parent;
+	struct rrpc_lun *rlun = rblk->rlun;
+	struct nvm_lun *lun = rlun->parent;
+
+	spin_lock(&rlun->lock);
+	if (blk->state & NVM_BLK_ST_TGT) {
+		list_move_tail(&blk->list, &lun->free_list);
+		lun->nr_free_blocks++;
+		blk->state = NVM_BLK_ST_FREE;
+	} else if (blk->state & NVM_BLK_ST_BAD) {
+		list_move_tail(&blk->list, &lun->bb_list);
+		blk->state = NVM_BLK_ST_BAD;
+	} else {
+		WARN_ON_ONCE(1);
+		pr_err("rrpc: erroneous block type (%lu -> %u)\n",
+							blk->id, blk->state);
+		list_move_tail(&blk->list, &lun->bb_list);
+	}
+	spin_unlock(&rlun->lock);
 }
 
 static void rrpc_put_blks(struct rrpc *rrpc)
@@ -250,13 +304,14 @@ static void rrpc_end_sync_bio(struct bio *bio)
  */
 static int rrpc_move_valid_pages(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	struct request_queue *q = rrpc->dev->q;
+	struct nvm_tgt_dev *dev = rrpc->dev;
+	struct request_queue *q = dev->q;
 	struct rrpc_rev_addr *rev;
 	struct nvm_rq *rqd;
 	struct bio *bio;
 	struct page *page;
 	int slot;
-	int nr_sec_per_blk = rrpc->dev->sec_per_blk;
+	int nr_sec_per_blk = dev->geo.sec_per_blk;
 	u64 phys_addr;
 	DECLARE_COMPLETION_ONSTACK(wait);
 
@@ -366,7 +421,7 @@ static void rrpc_block_gc(struct work_struct *work)
 	struct rrpc *rrpc = gcb->rrpc;
 	struct rrpc_block *rblk = gcb->rblk;
 	struct rrpc_lun *rlun = rblk->rlun;
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 
 	mempool_free(gcb, rrpc->gcb_pool);
 	pr_debug("nvm: block '%lu' being reclaimed\n", rblk->parent->id);
@@ -374,7 +429,7 @@ static void rrpc_block_gc(struct work_struct *work)
 	if (rrpc_move_valid_pages(rrpc, rblk))
 		goto put_back;
 
-	if (nvm_erase_blk(dev, rblk->parent, 0))
+	if (nvm_erase_blk(dev->parent, rblk->parent, 0))
 		goto put_back;
 
 	rrpc_put_blk(rrpc, rblk);
@@ -420,11 +475,12 @@ static void rrpc_lun_gc(struct work_struct *work)
 {
 	struct rrpc_lun *rlun = container_of(work, struct rrpc_lun, ws_gc);
 	struct rrpc *rrpc = rlun->rrpc;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_lun *lun = rlun->parent;
 	struct rrpc_block_gc *gcb;
 	unsigned int nr_blocks_need;
 
-	nr_blocks_need = rrpc->dev->blks_per_lun / GC_LIMIT_INVERSE;
+	nr_blocks_need = dev->geo.blks_per_lun / GC_LIMIT_INVERSE;
 
 	if (nr_blocks_need < rrpc->nr_luns)
 		nr_blocks_need = rrpc->nr_luns;
@@ -645,15 +701,15 @@ static void rrpc_run_gc(struct rrpc *rrpc, struct rrpc_block *rblk)
 	queue_work(rrpc->kgc_wq, &gcb->ws_gc);
 }
 
-static void __rrpc_mark_bad_block(struct nvm_dev *dev, struct ppa_addr *ppa)
+static void __rrpc_mark_bad_block(struct nvm_tgt_dev *dev, struct ppa_addr *ppa)
 {
-		nvm_mark_blk(dev, *ppa, NVM_BLK_ST_BAD);
-		nvm_set_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
+		nvm_mark_blk(dev->parent, *ppa, NVM_BLK_ST_BAD);
+		nvm_set_bb_tbl(dev->parent, ppa, 1, NVM_BLK_T_GRWN_BAD);
 }
 
 static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	void *comp_bits = &rqd->ppa_status;
 	struct ppa_addr ppa, prev_ppa;
 	int nr_ppas = rqd->nr_ppas;
@@ -676,6 +732,7 @@ static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd)
 static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
 						sector_t laddr, uint8_t npages)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_addr *p;
 	struct rrpc_block *rblk;
 	struct nvm_lun *lun;
@@ -687,7 +744,7 @@ static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
 		lun = rblk->parent->lun;
 
 		cmnt_size = atomic_inc_return(&rblk->data_cmnt_size);
-		if (unlikely(cmnt_size == rrpc->dev->sec_per_blk))
+		if (unlikely(cmnt_size == dev->geo.sec_per_blk))
 			rrpc_run_gc(rrpc, rblk);
 	}
 }
@@ -695,6 +752,7 @@ static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
 static void rrpc_end_io(struct nvm_rq *rqd)
 {
 	struct rrpc *rrpc = container_of(rqd->ins, struct rrpc, instance);
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd);
 	uint8_t npages = rqd->nr_ppas;
 	sector_t laddr = rrpc_get_laddr(rqd->bio) - npages;
@@ -714,7 +772,7 @@ static void rrpc_end_io(struct nvm_rq *rqd)
 	rrpc_unlock_rq(rrpc, rqd);
 
 	if (npages > 1)
-		nvm_dev_dma_free(rrpc->dev, rqd->ppa_list, rqd->dma_ppa_list);
+		nvm_dev_dma_free(dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
 
 	mempool_free(rqd, rrpc->rq_pool);
 }
@@ -722,6 +780,7 @@ static void rrpc_end_io(struct nvm_rq *rqd)
 static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 			struct nvm_rq *rqd, unsigned long flags, int npages)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_inflight_rq *r = rrpc_get_inflight_rq(rqd);
 	struct rrpc_addr *gp;
 	sector_t laddr = rrpc_get_laddr(bio);
@@ -729,7 +788,7 @@ static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 	int i;
 
 	if (!is_gc && rrpc_lock_rq(rrpc, bio, rqd)) {
-		nvm_dev_dma_free(rrpc->dev, rqd->ppa_list, rqd->dma_ppa_list);
+		nvm_dev_dma_free(dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
 		return NVM_IO_REQUEUE;
 	}
 
@@ -739,12 +798,11 @@ static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 		gp = &rrpc->trans_map[laddr + i];
 
 		if (gp->rblk) {
-			rqd->ppa_list[i] = rrpc_ppa_to_gaddr(rrpc->dev,
-								gp->addr);
+			rqd->ppa_list[i] = rrpc_ppa_to_gaddr(dev, gp->addr);
 		} else {
 			BUG_ON(is_gc);
 			rrpc_unlock_laddr(rrpc, r);
-			nvm_dev_dma_free(rrpc->dev, rqd->ppa_list,
+			nvm_dev_dma_free(dev->parent, rqd->ppa_list,
 							rqd->dma_ppa_list);
 			return NVM_IO_DONE;
 		}
@@ -784,6 +842,7 @@ static int rrpc_read_rq(struct rrpc *rrpc, struct bio *bio, struct nvm_rq *rqd,
 static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 			struct nvm_rq *rqd, unsigned long flags, int npages)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_inflight_rq *r = rrpc_get_inflight_rq(rqd);
 	struct rrpc_addr *p;
 	sector_t laddr = rrpc_get_laddr(bio);
@@ -791,7 +850,7 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 	int i;
 
 	if (!is_gc && rrpc_lock_rq(rrpc, bio, rqd)) {
-		nvm_dev_dma_free(rrpc->dev, rqd->ppa_list, rqd->dma_ppa_list);
+		nvm_dev_dma_free(dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
 		return NVM_IO_REQUEUE;
 	}
 
@@ -801,14 +860,13 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 		if (!p) {
 			BUG_ON(is_gc);
 			rrpc_unlock_laddr(rrpc, r);
-			nvm_dev_dma_free(rrpc->dev, rqd->ppa_list,
+			nvm_dev_dma_free(dev->parent, rqd->ppa_list,
 							rqd->dma_ppa_list);
 			rrpc_gc_kick(rrpc);
 			return NVM_IO_REQUEUE;
 		}
 
-		rqd->ppa_list[i] = rrpc_ppa_to_gaddr(rrpc->dev,
-								p->addr);
+		rqd->ppa_list[i] = rrpc_ppa_to_gaddr(dev, p->addr);
 	}
 
 	rqd->opcode = NVM_OP_HBWRITE;
@@ -843,8 +901,10 @@ static int rrpc_write_rq(struct rrpc *rrpc, struct bio *bio,
 static int rrpc_setup_rq(struct rrpc *rrpc, struct bio *bio,
 			struct nvm_rq *rqd, unsigned long flags, uint8_t npages)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
+
 	if (npages > 1) {
-		rqd->ppa_list = nvm_dev_dma_alloc(rrpc->dev, GFP_KERNEL,
+		rqd->ppa_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
 							&rqd->dma_ppa_list);
 		if (!rqd->ppa_list) {
 			pr_err("rrpc: not able to allocate ppa list\n");
@@ -867,14 +927,15 @@ static int rrpc_setup_rq(struct rrpc *rrpc, struct bio *bio,
 static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 				struct nvm_rq *rqd, unsigned long flags)
 {
-	int err;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_rq *rrq = nvm_rq_to_pdu(rqd);
 	uint8_t nr_pages = rrpc_get_pages(bio);
 	int bio_size = bio_sectors(bio) << 9;
+	int err;
 
-	if (bio_size < rrpc->dev->sec_size)
+	if (bio_size < dev->geo.sec_size)
 		return NVM_IO_ERR;
-	else if (bio_size > rrpc->dev->max_rq_size)
+	else if (bio_size > dev->geo.max_rq_size)
 		return NVM_IO_ERR;
 
 	err = rrpc_setup_rq(rrpc, bio, rqd, flags, nr_pages);
@@ -887,15 +948,15 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 	rqd->nr_ppas = nr_pages;
 	rrq->flags = flags;
 
-	err = nvm_submit_io(rrpc->dev, rqd);
+	err = nvm_submit_io(dev->parent, rqd);
 	if (err) {
 		pr_err("rrpc: I/O submission failed: %d\n", err);
 		bio_put(bio);
 		if (!(flags & NVM_IOTYPE_GC)) {
 			rrpc_unlock_rq(rrpc, rqd);
 			if (rqd->nr_ppas > 1)
-				nvm_dev_dma_free(rrpc->dev,
-			rqd->ppa_list, rqd->dma_ppa_list);
+				nvm_dev_dma_free(dev->parent,
+					rqd->ppa_list, rqd->dma_ppa_list);
 		}
 		return NVM_IO_ERR;
 	}
@@ -997,17 +1058,11 @@ static void rrpc_map_free(struct rrpc *rrpc)
 static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 {
 	struct rrpc *rrpc = (struct rrpc *)private;
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_addr *addr = rrpc->trans_map + slba;
 	struct rrpc_rev_addr *raddr = rrpc->rev_trans_map;
-	u64 elba = slba + nlb;
 	u64 i;
 
-	if (unlikely(elba > dev->total_secs)) {
-		pr_err("nvm: L2P data from device is out of bounds!\n");
-		return -EINVAL;
-	}
-
 	for (i = 0; i < nlb; i++) {
 		u64 pba = le64_to_cpu(entries[i]);
 		unsigned int mod;
@@ -1037,7 +1092,7 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 static int rrpc_map_init(struct rrpc *rrpc)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	sector_t i;
 	int ret;
 
@@ -1062,7 +1117,7 @@ static int rrpc_map_init(struct rrpc *rrpc)
 		return 0;
 
 	/* Bring up the mapping table from device */
-	ret = dev->ops->get_l2p_tbl(dev, rrpc->soffset, rrpc->nr_sects,
+	ret = dev->ops->get_l2p_tbl(dev->parent, rrpc->soffset, rrpc->nr_sects,
 					rrpc_l2p_update, rrpc);
 	if (ret) {
 		pr_err("nvm: rrpc: could not read L2P table.\n");
@@ -1102,7 +1157,7 @@ static int rrpc_core_init(struct rrpc *rrpc)
 	if (!rrpc->page_pool)
 		return -ENOMEM;
 
-	rrpc->gcb_pool = mempool_create_slab_pool(rrpc->dev->nr_luns,
+	rrpc->gcb_pool = mempool_create_slab_pool(rrpc->dev->geo.nr_luns,
 								rrpc_gcb_cache);
 	if (!rrpc->gcb_pool)
 		return -ENOMEM;
@@ -1146,11 +1201,12 @@ static void rrpc_luns_free(struct rrpc *rrpc)
 
 static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
+	struct nvm_geo *geo = &dev->geo;
 	struct rrpc_lun *rlun;
 	int i, j, ret = -EINVAL;
 
-	if (dev->sec_per_blk > MAX_INVALID_PAGES_STORAGE * BITS_PER_LONG) {
+	if (geo->sec_per_blk > MAX_INVALID_PAGES_STORAGE * BITS_PER_LONG) {
 		pr_err("rrpc: number of pages per block too high.");
 		return -EINVAL;
 	}
@@ -1167,20 +1223,20 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 		int lunid = lun_begin + i;
 		struct nvm_lun *lun;
 
-		lun = dev->mt->get_lun(dev, lunid);
+		lun = dev->mt->get_lun(dev->parent, lunid);
 		if (!lun)
 			goto err;
 
 		rlun = &rrpc->luns[i];
 		rlun->parent = lun;
 		rlun->blocks = vzalloc(sizeof(struct rrpc_block) *
-						rrpc->dev->blks_per_lun);
+							geo->blks_per_lun);
 		if (!rlun->blocks) {
 			ret = -ENOMEM;
 			goto err;
 		}
 
-		for (j = 0; j < rrpc->dev->blks_per_lun; j++) {
+		for (j = 0; j < geo->blks_per_lun; j++) {
 			struct rrpc_block *rblk = &rlun->blocks[j];
 			struct nvm_block *blk = &lun->blocks[j];
 
@@ -1190,6 +1246,8 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 			spin_lock_init(&rblk->lock);
 		}
 
+		rlun->reserved_blocks = 2; /* for GC only */
+
 		rlun->rrpc = rrpc;
 		INIT_LIST_HEAD(&rlun->prio_list);
 		INIT_LIST_HEAD(&rlun->wblk_list);
@@ -1206,27 +1264,27 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 /* returns 0 on success and stores the beginning address in *begin */
 static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvmm_type *mt = dev->mt;
-	sector_t size = rrpc->nr_sects * dev->sec_size;
+	sector_t size = rrpc->nr_sects * dev->geo.sec_size;
 	int ret;
 
 	size >>= 9;
 
-	ret = mt->get_area(dev, begin, size);
+	ret = mt->get_area(dev->parent, begin, size);
 	if (!ret)
-		*begin >>= (ilog2(dev->sec_size) - 9);
+		*begin >>= (ilog2(dev->geo.sec_size) - 9);
 
 	return ret;
 }
 
 static void rrpc_area_free(struct rrpc *rrpc)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvmm_type *mt = dev->mt;
-	sector_t begin = rrpc->soffset << (ilog2(dev->sec_size) - 9);
+	sector_t begin = rrpc->soffset << (ilog2(dev->geo.sec_size) - 9);
 
-	mt->put_area(dev, begin);
+	mt->put_area(dev->parent, begin);
 }
 
 static void rrpc_free(struct rrpc *rrpc)
@@ -1255,11 +1313,11 @@ static void rrpc_exit(void *private)
 static sector_t rrpc_capacity(void *private)
 {
 	struct rrpc *rrpc = private;
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	sector_t reserved, provisioned;
 
 	/* cur, gc, and two emergency blocks for each lun */
-	reserved = rrpc->nr_luns * dev->sec_per_blk * 4;
+	reserved = rrpc->nr_luns * dev->geo.sec_per_blk * 4;
 	provisioned = rrpc->nr_sects - reserved;
 
 	if (reserved > rrpc->nr_sects) {
@@ -1278,13 +1336,13 @@ static sector_t rrpc_capacity(void *private)
  */
 static void rrpc_block_map_update(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	struct nvm_dev *dev = rrpc->dev;
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	int offset;
 	struct rrpc_addr *laddr;
 	u64 bpaddr, paddr, pladdr;
 
 	bpaddr = block_to_rel_addr(rrpc, rblk);
-	for (offset = 0; offset < dev->sec_per_blk; offset++) {
+	for (offset = 0; offset < dev->geo.sec_per_blk; offset++) {
 		paddr = bpaddr + offset;
 
 		pladdr = rrpc->rev_trans_map[paddr].addr;
@@ -1304,6 +1362,7 @@ static void rrpc_block_map_update(struct rrpc *rrpc, struct rrpc_block *rblk)
 
 static int rrpc_blocks_init(struct rrpc *rrpc)
 {
+	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_lun *rlun;
 	struct rrpc_block *rblk;
 	int lun_iter, blk_iter;
@@ -1311,7 +1370,7 @@ static int rrpc_blocks_init(struct rrpc *rrpc)
 	for (lun_iter = 0; lun_iter < rrpc->nr_luns; lun_iter++) {
 		rlun = &rrpc->luns[lun_iter];
 
-		for (blk_iter = 0; blk_iter < rrpc->dev->blks_per_lun;
+		for (blk_iter = 0; blk_iter < dev->geo.blks_per_lun;
 								blk_iter++) {
 			rblk = &rlun->blocks[blk_iter];
 			rrpc_block_map_update(rrpc, rblk);
@@ -1350,11 +1409,12 @@ static int rrpc_luns_configure(struct rrpc *rrpc)
 
 static struct nvm_tgt_type tt_rrpc;
 
-static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
+static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
 						int lun_begin, int lun_end)
 {
 	struct request_queue *bqueue = dev->q;
 	struct request_queue *tqueue = tdisk->queue;
+	struct nvm_geo *geo = &dev->geo;
 	struct rrpc *rrpc;
 	sector_t soffset;
 	int ret;
@@ -1377,8 +1437,8 @@ static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
 	spin_lock_init(&rrpc->bio_lock);
 	INIT_WORK(&rrpc->ws_requeue, rrpc_requeue);
 
-	rrpc->nr_luns = lun_end - lun_begin + 1;
-	rrpc->nr_sects = (unsigned long long)dev->sec_per_lun * rrpc->nr_luns;
+	rrpc->nr_luns = geo->nr_luns;
+	rrpc->nr_sects = (unsigned long long)geo->sec_per_lun * rrpc->nr_luns;
 
 	/* simple round-robin strategy */
 	atomic_set(&rrpc->next_lun, -1);
@@ -1396,7 +1456,7 @@ static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
 		goto err;
 	}
 
-	rrpc->poffset = dev->sec_per_lun * lun_begin;
+	rrpc->poffset = geo->sec_per_lun * lun_begin;
 
 	ret = rrpc_core_init(rrpc);
 	if (ret) {
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index bed49ba..242d4c1 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -52,9 +52,12 @@ struct rrpc_rq {
 };
 
 struct rrpc_block {
+	unsigned long id;
 	struct nvm_block *parent;
 	struct rrpc_lun *rlun;
-	struct list_head prio;
+
+	struct list_head prio;		/* LUN CG list */
+	struct list_head list;		/* LUN free, used, bb list */
 
 #define MAX_INVALID_PAGES_STORAGE 8
 	/* Bitmap for invalid page intries */
@@ -64,6 +67,8 @@ struct rrpc_block {
 	/* number of pages that are invalid, wrt host page size */
 	unsigned int nr_invalid_pages;
 
+	int state;
+
 	spinlock_t lock;
 	atomic_t data_cmnt_size; /* data pages committed to stable storage */
 };
@@ -71,6 +76,7 @@ struct rrpc_block {
 struct rrpc_lun {
 	struct rrpc *rrpc;
 	struct nvm_lun *parent;
+
 	struct rrpc_block *cur, *gc_cur;
 	struct rrpc_block *blocks;	/* Reference to block allocation */
 
@@ -79,6 +85,8 @@ struct rrpc_lun {
 
 	struct work_struct ws_gc;
 
+	int reserved_blocks;
+
 	spinlock_t lock;
 };
 
@@ -86,7 +94,7 @@ struct rrpc {
 	/* instance must be kept in top to resolve rrpc in unprep */
 	struct nvm_tgt_instance instance;
 
-	struct nvm_dev *dev;
+	struct nvm_tgt_dev *dev;
 	struct gendisk *disk;
 
 	sector_t soffset; /* logical sector offset */
@@ -151,7 +159,8 @@ static inline struct rrpc_block *rrpc_get_rblk(struct rrpc_lun *rlun,
 								int blk_id)
 {
 	struct rrpc *rrpc = rlun->rrpc;
-	int lun_blk = blk_id % rrpc->dev->blks_per_lun;
+	struct nvm_tgt_dev *dev = rrpc->dev;
+	int lun_blk = blk_id % dev->geo.blks_per_lun;
 
 	return &rlun->blocks[lun_blk];
 }
diff --git a/drivers/lightnvm/sysblk.c b/drivers/lightnvm/sysblk.c
index fa644af..12002bf 100644
--- a/drivers/lightnvm/sysblk.c
+++ b/drivers/lightnvm/sysblk.c
@@ -62,7 +62,8 @@ static void nvm_cpu_to_sysblk(struct nvm_system_block *sb,
 
 static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas)
 {
-	int nr_rows = min_t(int, MAX_SYSBLKS, dev->nr_chnls);
+	struct nvm_geo *geo = &dev->geo;
+	int nr_rows = min_t(int, MAX_SYSBLKS, geo->nr_chnls);
 	int i;
 
 	for (i = 0; i < nr_rows; i++)
@@ -71,7 +72,7 @@ static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas)
 	/* if possible, place sysblk at first channel, middle channel and last
 	 * channel of the device. If not, create only one or two sys blocks
 	 */
-	switch (dev->nr_chnls) {
+	switch (geo->nr_chnls) {
 	case 2:
 		sysblk_ppas[1].g.ch = 1;
 		/* fall-through */
@@ -80,8 +81,8 @@ static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas)
 		break;
 	default:
 		sysblk_ppas[0].g.ch = 0;
-		sysblk_ppas[1].g.ch = dev->nr_chnls / 2;
-		sysblk_ppas[2].g.ch = dev->nr_chnls - 1;
+		sysblk_ppas[1].g.ch = geo->nr_chnls / 2;
+		sysblk_ppas[2].g.ch = geo->nr_chnls - 1;
 		break;
 	}
 
@@ -162,11 +163,12 @@ static int sysblk_get_host_blks(struct nvm_dev *dev, struct ppa_addr ppa,
 static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s,
 				struct ppa_addr *ppas, int get_free)
 {
+	struct nvm_geo *geo = &dev->geo;
 	int i, nr_blks, ret = 0;
 	u8 *blks;
 
 	s->nr_ppas = 0;
-	nr_blks = dev->blks_per_lun * dev->plane_mode;
+	nr_blks = geo->blks_per_lun * geo->plane_mode;
 
 	blks = kmalloc(nr_blks, GFP_KERNEL);
 	if (!blks)
@@ -210,13 +212,14 @@ static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s,
 static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa,
 						struct nvm_system_block *sblk)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct nvm_system_block *cur;
 	int pg, ret, found = 0;
 
 	/* the full buffer for a flash page is allocated. Only the first of it
 	 * contains the system block information
 	 */
-	cur = kmalloc(dev->pfpg_size, GFP_KERNEL);
+	cur = kmalloc(geo->pfpg_size, GFP_KERNEL);
 	if (!cur)
 		return -ENOMEM;
 
@@ -225,7 +228,7 @@ static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa,
 		ppa->g.pg = ppa_to_slc(dev, pg);
 
 		ret = nvm_submit_ppa(dev, ppa, 1, NVM_OP_PREAD, NVM_IO_SLC_MODE,
-							cur, dev->pfpg_size);
+							cur, geo->pfpg_size);
 		if (ret) {
 			if (ret == NVM_RSP_ERR_EMPTYPAGE) {
 				pr_debug("nvm: sysblk scan empty ppa (%u %u %u %u)\n",
@@ -276,6 +279,7 @@ static int nvm_sysblk_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s,
 static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
 							struct sysblk_scan *s)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct nvm_system_block nvmsb;
 	void *buf;
 	int i, sect, ret = 0;
@@ -283,12 +287,12 @@ static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
 
 	nvm_cpu_to_sysblk(&nvmsb, info);
 
-	buf = kzalloc(dev->pfpg_size, GFP_KERNEL);
+	buf = kzalloc(geo->pfpg_size, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 	memcpy(buf, &nvmsb, sizeof(struct nvm_system_block));
 
-	ppas = kcalloc(dev->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL);
+	ppas = kcalloc(geo->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL);
 	if (!ppas) {
 		ret = -ENOMEM;
 		goto err;
@@ -305,15 +309,15 @@ static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
 							ppas[0].g.pg);
 
 		/* Expand to all sectors within a flash page */
-		if (dev->sec_per_pg > 1) {
-			for (sect = 1; sect < dev->sec_per_pg; sect++) {
+		if (geo->sec_per_pg > 1) {
+			for (sect = 1; sect < geo->sec_per_pg; sect++) {
 				ppas[sect].ppa = ppas[0].ppa;
 				ppas[sect].g.sec = sect;
 			}
 		}
 
-		ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PWRITE,
-					NVM_IO_SLC_MODE, buf, dev->pfpg_size);
+		ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PWRITE,
+					NVM_IO_SLC_MODE, buf, geo->pfpg_size);
 		if (ret) {
 			pr_err("nvm: sysblk failed program (%u %u %u)\n",
 							ppas[0].g.ch,
@@ -322,8 +326,8 @@ static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
 			break;
 		}
 
-		ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PREAD,
-					NVM_IO_SLC_MODE, buf, dev->pfpg_size);
+		ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PREAD,
+					NVM_IO_SLC_MODE, buf, geo->pfpg_size);
 		if (ret) {
 			pr_err("nvm: sysblk failed read (%u %u %u)\n",
 							ppas[0].g.ch,
@@ -527,6 +531,7 @@ int nvm_update_sysblock(struct nvm_dev *dev, struct nvm_sb_info *new)
 
 int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
 	struct sysblk_scan s;
 	int ret;
@@ -541,7 +546,7 @@ int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info)
 	if (!dev->ops->get_bb_tbl || !dev->ops->set_bb_tbl)
 		return -EINVAL;
 
-	if (!(dev->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) {
+	if (!(geo->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) {
 		pr_err("nvm: memory does not support SLC access\n");
 		return -EINVAL;
 	}
@@ -571,11 +576,11 @@ static int factory_nblks(int nblks)
 	return (nblks + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
 }
 
-static unsigned int factory_blk_offset(struct nvm_dev *dev, struct ppa_addr ppa)
+static unsigned int factory_blk_offset(struct nvm_geo *geo, struct ppa_addr ppa)
 {
-	int nblks = factory_nblks(dev->blks_per_lun);
+	int nblks = factory_nblks(geo->blks_per_lun);
 
-	return ((ppa.g.ch * dev->luns_per_chnl * nblks) + (ppa.g.lun * nblks)) /
+	return ((ppa.g.ch * geo->luns_per_chnl * nblks) + (ppa.g.lun * nblks)) /
 								BITS_PER_LONG;
 }
 
@@ -589,7 +594,7 @@ static int nvm_factory_blks(struct nvm_dev *dev, struct ppa_addr ppa,
 	if (nr_blks < 0)
 		return nr_blks;
 
-	lunoff = factory_blk_offset(dev, ppa);
+	lunoff = factory_blk_offset(&dev->geo, ppa);
 
 	/* non-set bits correspond to the block must be erased */
 	for (i = 0; i < nr_blks; i++) {
@@ -618,19 +623,19 @@ static int nvm_factory_blks(struct nvm_dev *dev, struct ppa_addr ppa,
 static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list,
 					int max_ppas, unsigned long *blk_bitmap)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr ppa;
 	int ch, lun, blkid, idx, done = 0, ppa_cnt = 0;
 	unsigned long *offset;
 
 	while (!done) {
 		done = 1;
-		nvm_for_each_lun_ppa(dev, ppa, ch, lun) {
-			idx = factory_blk_offset(dev, ppa);
+		nvm_for_each_lun_ppa(geo, ppa, ch, lun) {
+			idx = factory_blk_offset(geo, ppa);
 			offset = &blk_bitmap[idx];
 
-			blkid = find_first_zero_bit(offset,
-						dev->blks_per_lun);
-			if (blkid >= dev->blks_per_lun)
+			blkid = find_first_zero_bit(offset, geo->blks_per_lun);
+			if (blkid >= geo->blks_per_lun)
 				continue;
 			set_bit(blkid, offset);
 
@@ -655,16 +660,17 @@ static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list,
 static int nvm_fact_select_blks(struct nvm_dev *dev, unsigned long *blk_bitmap,
 								int flags)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr ppa;
 	int ch, lun, nr_blks, ret = 0;
 	u8 *blks;
 
-	nr_blks = dev->blks_per_lun * dev->plane_mode;
+	nr_blks = geo->blks_per_lun * geo->plane_mode;
 	blks = kmalloc(nr_blks, GFP_KERNEL);
 	if (!blks)
 		return -ENOMEM;
 
-	nvm_for_each_lun_ppa(dev, ppa, ch, lun) {
+	nvm_for_each_lun_ppa(geo, ppa, ch, lun) {
 		ret = nvm_get_bb_tbl(dev, ppa, blks);
 		if (ret)
 			pr_err("nvm: failed bb tbl for ch%u lun%u\n",
@@ -682,14 +688,15 @@ static int nvm_fact_select_blks(struct nvm_dev *dev, unsigned long *blk_bitmap,
 
 int nvm_dev_factory(struct nvm_dev *dev, int flags)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr *ppas;
 	int ppa_cnt, ret = -ENOMEM;
-	int max_ppas = dev->ops->max_phys_sect / dev->nr_planes;
+	int max_ppas = dev->ops->max_phys_sect / geo->nr_planes;
 	struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
 	struct sysblk_scan s;
 	unsigned long *blk_bitmap;
 
-	blk_bitmap = kzalloc(factory_nblks(dev->blks_per_lun) * dev->nr_luns,
+	blk_bitmap = kzalloc(factory_nblks(geo->blks_per_lun) * geo->nr_luns,
 								GFP_KERNEL);
 	if (!blk_bitmap)
 		return ret;
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 037dff5..1cdc812 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -352,6 +352,7 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
 
 	while (nlb) {
 		u32 cmd_nlb = min(nlb_pr_rq, nlb);
+		u64 elba = slba + cmd_nlb;
 
 		c.l2p.slba = cpu_to_le64(cmd_slba);
 		c.l2p.nlb = cpu_to_le32(cmd_nlb);
@@ -365,6 +366,11 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
 			goto out;
 		}
 
+		if (unlikely(elba > nvmdev->total_secs)) {
+			pr_err("nvm: L2P data from device is out of bounds!\n");
+			return -EINVAL;
+		}
+
 		if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
 			ret = -EINTR;
 			goto out;
@@ -383,11 +389,12 @@ 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 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 = nvmdev->blks_per_lun * nvmdev->plane_mode;
+	int nr_blks = geo->blks_per_lun * geo->plane_mode;
 	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
 	int ret = 0;
 
@@ -428,7 +435,7 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 		goto out;
 	}
 
-	memcpy(blks, bb_tbl->blk, nvmdev->blks_per_lun * nvmdev->plane_mode);
+	memcpy(blks, bb_tbl->blk, geo->blks_per_lun * geo->plane_mode);
 out:
 	kfree(bb_tbl);
 	return ret;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 89c6954..1f1588c 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -211,7 +211,7 @@ struct nvm_id {
 struct nvm_target {
 	struct list_head list;
 	struct list_head lun_list;
-	struct nvm_dev *dev;
+	struct nvm_tgt_dev *dev;
 	struct nvm_tgt_type *type;
 	struct gendisk *disk;
 };
@@ -286,7 +286,6 @@ struct nvm_lun {
 					 * free_list and used_list
 					 */
 	unsigned int nr_free_blocks;	/* Number of unused blocks */
-	int reserved_blocks;
 
 	struct nvm_block *blocks;
 };
@@ -315,22 +314,12 @@ struct nvm_sb_info {
 	struct ppa_addr		fs_ppa;
 };
 
-struct nvm_dev {
-	struct nvm_dev_ops *ops;
-
-	struct list_head devices;
-
-	/* Media manager */
-	struct nvmm_type *mt;
-	void *mp;
-
-	/* System blocks */
-	struct nvm_sb_info sb;
-
-	/* Device information */
+/* Device generic information */
+struct nvm_geo {
 	int nr_chnls;
+	int nr_luns;
+	int luns_per_chnl; /* -1 if channels are not symmetric */
 	int nr_planes;
-	int luns_per_chnl;
 	int sec_per_pg; /* only sectors for a single page */
 	int pgs_per_blk;
 	int blks_per_lun;
@@ -350,14 +339,43 @@ struct nvm_dev {
 	int sec_per_pl; /* all sectors across planes */
 	int sec_per_blk;
 	int sec_per_lun;
+};
+
+struct nvm_tgt_dev {
+	/* Device information */
+	struct nvm_geo geo;
+
+	sector_t total_secs;
+
+	struct nvm_id identity;
+	struct request_queue *q;
+
+	struct nvmm_type *mt;
+	struct nvm_dev_ops *ops;
+
+	void *parent;
+};
+
+struct nvm_dev {
+	struct nvm_dev_ops *ops;
+
+	struct list_head devices;
+
+	/* Media manager */
+	struct nvmm_type *mt;
+	void *mp;
+
+	/* System blocks */
+	struct nvm_sb_info sb;
+
+	/* Device information */
+	struct nvm_geo geo;
 
 	/* lower page table */
 	int lps_per_blk;
 	int *lptbl;
 
-	unsigned long total_blocks;
 	unsigned long total_secs;
-	int nr_luns;
 
 	unsigned long *lun_map;
 	void *dma_pool;
@@ -373,7 +391,7 @@ struct nvm_dev {
 	spinlock_t lock;
 };
 
-static inline struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
+static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
 							struct ppa_addr r)
 {
 	struct ppa_addr l;
@@ -382,22 +400,22 @@ static inline struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
 
 	l.ppa = 0;
 
-	div_u64_rem(ppa, dev->sec_per_pg, &secs);
+	div_u64_rem(ppa, geo->sec_per_pg, &secs);
 	l.g.sec = secs;
 
-	sector_div(ppa, dev->sec_per_pg);
-	div_u64_rem(ppa, dev->pgs_per_blk, &pgs);
+	sector_div(ppa, geo->sec_per_pg);
+	div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
 	l.g.pg = pgs;
 
-	sector_div(ppa, dev->pgs_per_blk);
-	div_u64_rem(ppa, dev->blks_per_lun, &blks);
+	sector_div(ppa, geo->pgs_per_blk);
+	div_u64_rem(ppa, geo->blks_per_lun, &blks);
 	l.g.blk = blks;
 
-	sector_div(ppa, dev->blks_per_lun);
-	div_u64_rem(ppa, dev->luns_per_chnl, &luns);
+	sector_div(ppa, geo->blks_per_lun);
+	div_u64_rem(ppa, geo->luns_per_chnl, &luns);
 	l.g.lun = luns;
 
-	sector_div(ppa, dev->luns_per_chnl);
+	sector_div(ppa, geo->luns_per_chnl);
 	l.g.ch = ppa;
 
 	return l;
@@ -406,14 +424,15 @@ static inline struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
 static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
 						struct ppa_addr r)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr l;
 
-	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;
+	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;
 
 	return l;
 }
@@ -421,24 +440,25 @@ static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
 static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
 						struct ppa_addr r)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr l;
 
 	l.ppa = 0;
 	/*
 	 * (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));
+	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));
 
 	return l;
 }
@@ -456,11 +476,12 @@ static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
 static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
 							struct nvm_block *blk)
 {
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr ppa;
 	struct nvm_lun *lun = blk->lun;
 
 	ppa.ppa = 0;
-	ppa.g.blk = blk->id % dev->blks_per_lun;
+	ppa.g.blk = blk->id % geo->blks_per_lun;
 	ppa.g.lun = lun->lun_id;
 	ppa.g.ch = lun->chnl_id;
 
@@ -483,7 +504,8 @@ static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
 
 typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
 typedef sector_t (nvm_tgt_capacity_fn)(void *);
-typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *, int,
+				int);
 typedef void (nvm_tgt_exit_fn)(void *);
 
 struct nvm_tgt_type {
@@ -516,9 +538,6 @@ typedef void (nvmm_unregister_fn)(struct nvm_dev *);
 
 typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
 typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
-typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
-					      struct nvm_lun *, unsigned long);
-typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
@@ -538,10 +557,6 @@ struct nvmm_type {
 	nvmm_create_tgt_fn *create_tgt;
 	nvmm_remove_tgt_fn *remove_tgt;
 
-	/* Block administration callbacks */
-	nvmm_get_blk_fn *get_blk;
-	nvmm_put_blk_fn *put_blk;
-
 	nvmm_submit_io_fn *submit_io;
 	nvmm_erase_blk_fn *erase_blk;
 
@@ -563,10 +578,6 @@ struct nvmm_type {
 extern int nvm_register_mgr(struct nvmm_type *);
 extern void nvm_unregister_mgr(struct nvmm_type *);
 
-extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *,
-								unsigned long);
-extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *);
-
 extern struct nvm_dev *nvm_alloc_dev(int);
 extern int nvm_register(struct nvm_dev *);
 extern void nvm_unregister(struct nvm_dev *);
@@ -611,10 +622,10 @@ extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *);
 
 extern int nvm_dev_factory(struct nvm_dev *, int flags);
 
-#define nvm_for_each_lun_ppa(dev, ppa, chid, lunid)			\
-	for ((chid) = 0, (ppa).ppa = 0; (chid) < (dev)->nr_chnls;	\
+#define nvm_for_each_lun_ppa(geo, ppa, chid, lunid)			\
+	for ((chid) = 0, (ppa).ppa = 0; (chid) < (geo)->nr_chnls;	\
 					(chid)++, (ppa).g.ch = (chid))	\
-		for ((lunid) = 0; (lunid) < (dev)->luns_per_chnl;	\
+		for ((lunid) = 0; (lunid) < (geo)->luns_per_chnl;	\
 					(lunid)++, (ppa).g.lun = (lunid))
 
 #else /* CONFIG_NVM */
-- 
2.7.4

[PATCH 14/20] lightnvm: remove get_lun operation on gennvm

[Javier González]

Since LUNs are managed internally on the target, there is no need for
the media manager to implement a get_lun operation.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/gennvm.c | 13 +------------
 drivers/lightnvm/rrpc.c   | 23 +++++++++++------------
 include/linux/lightnvm.h  |  8 ++------
 3 files changed, 14 insertions(+), 30 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 8791a2a..3cf5d59 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -159,7 +159,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	tdisk->fops = &gen_fops;
 	tdisk->queue = tqueue;
 
-	targetdata = tt->init(tgt_dev, tdisk, s->lun_begin, s->lun_end);
+	targetdata = tt->init(tgt_dev, tdisk, &t->lun_list);
 	if (IS_ERR(targetdata))
 		goto err_init;
 
@@ -613,16 +613,6 @@ static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
 	return nvm_erase_ppa(dev, &addr, 1, flags);
 }
 
-static struct nvm_lun *gen_get_lun(struct nvm_dev *dev, int lunid)
-{
-	struct gen_dev *gn = dev->mp;
-
-	if (unlikely(lunid >= dev->geo.nr_luns))
-		return NULL;
-
-	return &gn->luns[lunid];
-}
-
 static void gen_lun_info_print(struct nvm_dev *dev)
 {
 	struct gen_dev *gn = dev->mp;
@@ -655,7 +645,6 @@ static struct nvmm_type gen = {
 
 	.mark_blk		= gen_mark_blk,
 
-	.get_lun		= gen_get_lun,
 	.lun_info_print		= gen_lun_info_print,
 
 	.get_area		= gen_get_area,
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 5377c7a..165b9d3 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -1199,10 +1199,11 @@ static void rrpc_luns_free(struct rrpc *rrpc)
 	kfree(rrpc->luns);
 }
 
-static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
+static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_geo *geo = &dev->geo;
+	struct nvm_lun *lun;
 	struct rrpc_lun *rlun;
 	int i, j, ret = -EINVAL;
 
@@ -1218,16 +1219,11 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 	if (!rrpc->luns)
 		return -ENOMEM;
 
+	i = 0;
+
 	/* 1:1 mapping */
-	for (i = 0; i < rrpc->nr_luns; i++) {
-		int lunid = lun_begin + i;
-		struct nvm_lun *lun;
-
-		lun = dev->mt->get_lun(dev->parent, lunid);
-		if (!lun)
-			goto err;
-
-		rlun = &rrpc->luns[i];
+	list_for_each_entry(lun, lun_list, list) {
+		rlun = &rrpc->luns[i++];
 		rlun->parent = lun;
 		rlun->blocks = vzalloc(sizeof(struct rrpc_block) *
 							geo->blks_per_lun);
@@ -1256,6 +1252,8 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
 		spin_lock_init(&rlun->lock);
 	}
 
+	WARN_ON(i != rrpc->nr_luns);
+
 	return 0;
 err:
 	return ret;
@@ -1410,12 +1408,13 @@ static int rrpc_luns_configure(struct rrpc *rrpc)
 static struct nvm_tgt_type tt_rrpc;
 
 static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
-						int lun_begin, int lun_end)
+						struct list_head *lun_list)
 {
 	struct request_queue *bqueue = dev->q;
 	struct request_queue *tqueue = tdisk->queue;
 	struct nvm_geo *geo = &dev->geo;
 	struct rrpc *rrpc;
+	int lun_begin = (list_first_entry(lun_list, struct nvm_lun, list))->id;
 	sector_t soffset;
 	int ret;
 
@@ -1450,7 +1449,7 @@ static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
 	}
 	rrpc->soffset = soffset;
 
-	ret = rrpc_luns_init(rrpc, lun_begin, lun_end);
+	ret = rrpc_luns_init(rrpc, lun_list);
 	if (ret) {
 		pr_err("nvm: rrpc: could not initialize luns\n");
 		goto err;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 1f1588c..e56c352 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -504,8 +504,8 @@ static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
 
 typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
 typedef sector_t (nvm_tgt_capacity_fn)(void *);
-typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *, int,
-				int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
+				struct list_head *lun_list);
 typedef void (nvm_tgt_exit_fn)(void *);
 
 struct nvm_tgt_type {
@@ -541,7 +541,6 @@ typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
-typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
 typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
 
 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
@@ -563,9 +562,6 @@ struct nvmm_type {
 	/* Bad block mgmt */
 	nvmm_mark_blk_fn *mark_blk;
 
-	/* Configuration management */
-	nvmm_get_lun_fn *get_lun;
-
 	/* Statistics */
 	nvmm_lun_info_print_fn *lun_info_print;
 
-- 
2.7.4

[PATCH 15/20] lightnvm: remove debug lun statistics from gennvm

[Javier González]

Since LUNs are managed internally on targets, the media manager has no
access to the free LUN lists. Thus, debug functions that show LUN
information on the device should not be implemented on the media
manager, but rather on the target in itself.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/gennvm.c | 19 -------------------
 include/linux/lightnvm.h  |  5 -----
 2 files changed, 24 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 3cf5d59..dd9afd7 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -613,23 +613,6 @@ static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
 	return nvm_erase_ppa(dev, &addr, 1, flags);
 }
 
-static void gen_lun_info_print(struct nvm_dev *dev)
-{
-	struct gen_dev *gn = dev->mp;
-	struct nvm_lun *lun;
-	unsigned int i;
-
-
-	gen_for_each_lun(gn, lun, i) {
-		spin_lock(&lun->lock);
-
-		pr_info("%s: lun%8u\t%u\n", dev->name, i,
-						lun->nr_free_blocks);
-
-		spin_unlock(&lun->lock);
-	}
-}
-
 static struct nvmm_type gen = {
 	.name			= "gennvm",
 	.version		= {0, 1, 0},
@@ -645,8 +628,6 @@ static struct nvmm_type gen = {
 
 	.mark_blk		= gen_mark_blk,
 
-	.lun_info_print		= gen_lun_info_print,
-
 	.get_area		= gen_get_area,
 	.put_area		= gen_put_area,
 
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index e56c352..ed04fa6 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -541,8 +541,6 @@ typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
 typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
-typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
-
 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
 typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
 
@@ -562,9 +560,6 @@ struct nvmm_type {
 	/* Bad block mgmt */
 	nvmm_mark_blk_fn *mark_blk;
 
-	/* Statistics */
-	nvmm_lun_info_print_fn *lun_info_print;
-
 	nvmm_get_area_fn *get_area;
 	nvmm_put_area_fn *put_area;
 
-- 
2.7.4

[PATCH 16/20] lightnvm: eliminate nvm_block abstraction on mm

[Javier González]

In order to naturally support multi-target instances on an Open-Channel
SSD, targets should own the LUNs they get blocks from and manage
provisioning internally. This is done in several steps.

A part of this transformation is that targets manage their blocks
internally. This patch eliminates the nvm_block abstraction and moves
block management to the target logic. The rrpc target is transformed.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c   |  10 +-
 drivers/lightnvm/gennvm.c | 205 +---------------------------------------
 drivers/lightnvm/rrpc.c   | 235 +++++++++++++++++++++++++++++++++-------------
 drivers/lightnvm/rrpc.h   |  23 +++--
 include/linux/lightnvm.h  |  48 +---------
 5 files changed, 192 insertions(+), 329 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 493ce03..691b16f 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -176,12 +176,6 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name)
 	return NULL;
 }
 
-void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
-{
-	return dev->mt->mark_blk(dev, ppa, type);
-}
-EXPORT_SYMBOL(nvm_mark_blk);
-
 int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
 								int type)
 {
@@ -215,9 +209,9 @@ int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 }
 EXPORT_SYMBOL(nvm_submit_io);
 
-int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
+int nvm_erase_blk(struct nvm_dev *dev, struct ppa_addr *p, int flags)
 {
-	return dev->mt->erase_blk(dev, blk, flags);
+	return dev->mt->erase_blk(dev, p, flags);
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index dd9afd7..19c3924 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -306,19 +306,6 @@ static void gen_put_area(struct nvm_dev *dev, sector_t begin)
 	spin_unlock(&dev->lock);
 }
 
-static void gen_blocks_free(struct nvm_dev *dev)
-{
-	struct gen_dev *gn = dev->mp;
-	struct nvm_lun *lun;
-	int i;
-
-	gen_for_each_lun(gn, lun, i) {
-		if (!lun->blocks)
-			break;
-		vfree(lun->blocks);
-	}
-}
-
 static void gen_luns_free(struct nvm_dev *dev)
 {
 	struct gen_dev *gn = dev->mp;
@@ -337,167 +324,17 @@ static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
 		return -ENOMEM;
 
 	gen_for_each_lun(gn, lun, i) {
-		INIT_LIST_HEAD(&lun->free_list);
-		INIT_LIST_HEAD(&lun->used_list);
-		INIT_LIST_HEAD(&lun->bb_list);
 		INIT_LIST_HEAD(&lun->list);
 
-		spin_lock_init(&lun->lock);
-
 		lun->id = i;
 		lun->lun_id = i % geo->luns_per_chnl;
 		lun->chnl_id = i / geo->luns_per_chnl;
-		lun->nr_free_blocks = geo->blks_per_lun;
 	}
 	return 0;
 }
 
-static int gen_block_bb(struct gen_dev *gn, struct ppa_addr ppa,
-							u8 *blks, int nr_blks)
-{
-	struct nvm_dev *dev = gn->dev;
-	struct nvm_lun *lun;
-	struct nvm_block *blk;
-	int i;
-
-	nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks);
-	if (nr_blks < 0)
-		return nr_blks;
-
-	lun = &gn->luns[(dev->geo.luns_per_chnl * ppa.g.ch) + ppa.g.lun];
-
-	for (i = 0; i < nr_blks; i++) {
-		if (blks[i] == NVM_BLK_T_FREE)
-			continue;
-
-		blk = &lun->blocks[i];
-		list_move_tail(&blk->list, &lun->bb_list);
-		blk->state = NVM_BLK_ST_BAD;
-		lun->nr_free_blocks--;
-	}
-
-	return 0;
-}
-
-static int gen_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
-{
-	struct nvm_dev *dev = private;
-	struct nvm_geo *geo = &dev->geo;
-	struct gen_dev *gn = dev->mp;
-	u64 elba = slba + nlb;
-	struct nvm_lun *lun;
-	struct nvm_block *blk;
-	u64 i;
-	int lun_id;
-
-	if (unlikely(elba > dev->total_secs)) {
-		pr_err("gen: L2P data from device is out of bounds!\n");
-		return -EINVAL;
-	}
-
-	for (i = 0; i < nlb; i++) {
-		u64 pba = le64_to_cpu(entries[i]);
-
-		if (unlikely(pba >= dev->total_secs && pba != U64_MAX)) {
-			pr_err("gen: L2P data entry is out of bounds!\n");
-			return -EINVAL;
-		}
-
-		/* Address zero is a special one. The first page on a disk is
-		 * protected. It often holds internal device boot
-		 * information.
-		 */
-		if (!pba)
-			continue;
-
-		/* resolve block from physical address */
-		lun_id = div_u64(pba, geo->sec_per_lun);
-		lun = &gn->luns[lun_id];
-
-		/* Calculate block offset into lun */
-		pba = pba - (geo->sec_per_lun * lun_id);
-		blk = &lun->blocks[div_u64(pba, geo->sec_per_blk)];
-
-		if (!blk->state) {
-			/* at this point, we don't know anything about the
-			 * block. It's up to the FTL on top to re-etablish the
-			 * block state. The block is assumed to be open.
-			 */
-			list_move_tail(&blk->list, &lun->used_list);
-			blk->state = NVM_BLK_ST_TGT;
-			lun->nr_free_blocks--;
-		}
-	}
-
-	return 0;
-}
-
-static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_lun *lun;
-	struct nvm_block *block;
-	sector_t lun_iter, blk_iter, cur_block_id = 0;
-	int ret, nr_blks;
-	u8 *blks;
-
-	nr_blks = geo->blks_per_lun * geo->plane_mode;
-	blks = kmalloc(nr_blks, GFP_KERNEL);
-	if (!blks)
-		return -ENOMEM;
-
-	gen_for_each_lun(gn, lun, lun_iter) {
-		lun->blocks = vzalloc(sizeof(struct nvm_block) *
-							geo->blks_per_lun);
-		if (!lun->blocks) {
-			kfree(blks);
-			return -ENOMEM;
-		}
-
-		for (blk_iter = 0; blk_iter < geo->blks_per_lun; blk_iter++) {
-			block = &lun->blocks[blk_iter];
-
-			INIT_LIST_HEAD(&block->list);
-
-			block->lun = lun;
-			block->id = cur_block_id++;
-
-			list_add_tail(&block->list, &lun->free_list);
-		}
-
-		if (dev->ops->get_bb_tbl) {
-			struct ppa_addr ppa;
-
-			ppa.ppa = 0;
-			ppa.g.ch = lun->chnl_id;
-			ppa.g.lun = lun->lun_id;
-
-			ret = nvm_get_bb_tbl(dev, ppa, blks);
-			if (ret)
-				pr_err("gen: could not get BB table\n");
-
-			ret = gen_block_bb(gn, ppa, blks, nr_blks);
-			if (ret)
-				pr_err("gen: BB table map failed\n");
-		}
-	}
-
-	if ((dev->identity.dom & NVM_RSP_L2P) && dev->ops->get_l2p_tbl) {
-		ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_secs,
-							gen_block_map, dev);
-		if (ret) {
-			pr_err("gen: could not read L2P table.\n");
-			pr_warn("gen: default block initialization");
-		}
-	}
-
-	kfree(blks);
-	return 0;
-}
-
 static void gen_free(struct nvm_dev *dev)
 {
-	gen_blocks_free(dev);
 	gen_luns_free(dev);
 	kfree(dev->mp);
 	dev->mp = NULL;
@@ -528,12 +365,6 @@ static int gen_register(struct nvm_dev *dev)
 		goto err;
 	}
 
-	ret = gen_blocks_init(dev, gn);
-	if (ret) {
-		pr_err("gen: could not initialize blocks\n");
-		goto err;
-	}
-
 	return 1;
 err:
 	gen_free(dev);
@@ -558,34 +389,6 @@ static void gen_unregister(struct nvm_dev *dev)
 	module_put(THIS_MODULE);
 }
 
-static void gen_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct gen_dev *gn = dev->mp;
-	struct nvm_lun *lun;
-	struct nvm_block *blk;
-
-	pr_debug("gen: ppa  (ch: %u lun: %u blk: %u pg: %u) -> %u\n",
-			ppa.g.ch, ppa.g.lun, ppa.g.blk, ppa.g.pg, type);
-
-	if (unlikely(ppa.g.ch > geo->nr_chnls ||
-					ppa.g.lun > geo->luns_per_chnl ||
-					ppa.g.blk > geo->blks_per_lun)) {
-		WARN_ON_ONCE(1);
-		pr_err("gen: ppa broken (ch: %u > %u lun: %u > %u blk: %u > %u",
-				ppa.g.ch, geo->nr_chnls,
-				ppa.g.lun, geo->luns_per_chnl,
-				ppa.g.blk, geo->blks_per_lun);
-		return;
-	}
-
-	lun = &gn->luns[(geo->luns_per_chnl * ppa.g.ch) + ppa.g.lun];
-	blk = &lun->blocks[ppa.g.blk];
-
-	/* will be moved to bb list on put_blk from target */
-	blk->state = type;
-}
-
 static void gen_end_io(struct nvm_rq *rqd)
 {
 	struct nvm_tgt_instance *ins = rqd->ins;
@@ -606,11 +409,9 @@ static int gen_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 	return dev->ops->submit_io(dev, rqd);
 }
 
-static int gen_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, int flags)
+static int gen_erase_blk(struct nvm_dev *dev, struct ppa_addr *p, int flags)
 {
-	struct ppa_addr addr = block_to_ppa(dev, blk);
-
-	return nvm_erase_ppa(dev, &addr, 1, flags);
+	return nvm_erase_ppa(dev, p, 1, flags);
 }
 
 static struct nvmm_type gen = {
@@ -626,8 +427,6 @@ static struct nvmm_type gen = {
 	.submit_io		= gen_submit_io,
 	.erase_blk		= gen_erase_blk,
 
-	.mark_blk		= gen_mark_blk,
-
 	.get_area		= gen_get_area,
 	.put_area		= gen_put_area,
 
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 165b9d3..fad117b 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -126,19 +126,21 @@ static int block_is_full(struct rrpc *rrpc, struct rrpc_block *rblk)
 static u64 block_to_rel_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvm_block *blk = rblk->parent;
-	int lun_blk = blk->id % (dev->geo.blks_per_lun * rrpc->nr_luns);
+	struct rrpc_lun *rlun = rblk->rlun;
+	struct nvm_lun *lun = rlun->parent;
 
-	return lun_blk * dev->geo.sec_per_blk;
+	return lun->id * dev->geo.sec_per_blk;
 }
 
 /* Calculate global addr for the given block */
 static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvm_block *blk = rblk->parent;
+	struct nvm_geo *geo = &dev->geo;
+	struct rrpc_lun *rlun = rblk->rlun;
+	struct nvm_lun *lun = rlun->parent;
 
-	return blk->id * dev->geo.sec_per_blk;
+	return lun->id * geo->sec_per_lun + rblk->id * geo->sec_per_blk;
 }
 
 static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_tgt_dev *dev, u64 addr)
@@ -163,51 +165,46 @@ static void rrpc_set_lun_cur(struct rrpc_lun *rlun, struct rrpc_block *new_rblk,
 	*cur_rblk = new_rblk;
 }
 
-static struct nvm_block *__rrpc_get_blk(struct rrpc *rrpc,
+static struct rrpc_block *__rrpc_get_blk(struct rrpc *rrpc,
 							struct rrpc_lun *rlun)
 {
-	struct nvm_lun *lun = rlun->parent;
-	struct nvm_block *blk = NULL;
+	struct rrpc_block *rblk = NULL;
 
-	if (list_empty(&lun->free_list))
+	if (list_empty(&rlun->free_list))
 		goto out;
 
-	blk = list_first_entry(&lun->free_list, struct nvm_block, list);
+	rblk = list_first_entry(&rlun->free_list, struct rrpc_block, list);
 
-	list_move_tail(&blk->list, &lun->used_list);
-	blk->state = NVM_BLK_ST_TGT;
-	lun->nr_free_blocks--;
+	list_move_tail(&rblk->list, &rlun->used_list);
+	rblk->state = NVM_BLK_ST_TGT;
+	rlun->nr_free_blocks--;
 
 out:
-	return blk;
+	return rblk;
 }
 
 static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 							unsigned long flags)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvm_lun *lun = rlun->parent;
-	struct nvm_block *blk;
 	struct rrpc_block *rblk;
 	int is_gc = flags & NVM_IOTYPE_GC;
 
 	spin_lock(&rlun->lock);
-	if (!is_gc && lun->nr_free_blocks < rlun->reserved_blocks) {
+	if (!is_gc && rlun->nr_free_blocks < rlun->reserved_blocks) {
 		pr_err("nvm: rrpc: cannot give block to non GC request\n");
 		spin_unlock(&rlun->lock);
 		return NULL;
 	}
 
-	blk = __rrpc_get_blk(rrpc, rlun);
-	if (!blk) {
+	rblk = __rrpc_get_blk(rrpc, rlun);
+	if (!rblk) {
 		pr_err("nvm: rrpc: cannot get new block\n");
 		spin_unlock(&rlun->lock);
 		return NULL;
 	}
 	spin_unlock(&rlun->lock);
 
-	rblk = rrpc_get_rblk(rlun, blk->id);
-	blk->priv = rblk;
 	bitmap_zero(rblk->invalid_pages, dev->geo.sec_per_blk);
 	rblk->next_page = 0;
 	rblk->nr_invalid_pages = 0;
@@ -218,23 +215,23 @@ static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 
 static void rrpc_put_blk(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	struct nvm_block *blk = rblk->parent;
 	struct rrpc_lun *rlun = rblk->rlun;
 	struct nvm_lun *lun = rlun->parent;
 
 	spin_lock(&rlun->lock);
-	if (blk->state & NVM_BLK_ST_TGT) {
-		list_move_tail(&blk->list, &lun->free_list);
-		lun->nr_free_blocks++;
-		blk->state = NVM_BLK_ST_FREE;
-	} else if (blk->state & NVM_BLK_ST_BAD) {
-		list_move_tail(&blk->list, &lun->bb_list);
-		blk->state = NVM_BLK_ST_BAD;
+	if (rblk->state & NVM_BLK_ST_TGT) {
+		list_move_tail(&rblk->list, &rlun->free_list);
+		rlun->nr_free_blocks++;
+		rblk->state = NVM_BLK_ST_FREE;
+	} else if (rblk->state & NVM_BLK_ST_BAD) {
+		list_move_tail(&rblk->list, &rlun->bb_list);
+		rblk->state = NVM_BLK_ST_BAD;
 	} else {
 		WARN_ON_ONCE(1);
-		pr_err("rrpc: erroneous block type (%lu -> %u)\n",
-							blk->id, blk->state);
-		list_move_tail(&blk->list, &lun->bb_list);
+		pr_err("rrpc: erroneous type (ch:%d,lun:%d,blk%d-> %u)\n",
+						lun->chnl_id, lun->lun_id,
+						rblk->id, rblk->state);
+		list_move_tail(&rblk->list, &rlun->bb_list);
 	}
 	spin_unlock(&rlun->lock);
 }
@@ -334,7 +331,7 @@ static int rrpc_move_valid_pages(struct rrpc *rrpc, struct rrpc_block *rblk)
 					    nr_sec_per_blk)) < nr_sec_per_blk) {
 
 		/* Lock laddr */
-		phys_addr = rblk->parent->id * nr_sec_per_blk + slot;
+		phys_addr = rrpc_blk_to_ppa(rrpc, rblk) + slot;
 
 try:
 		spin_lock(&rrpc->rev_lock);
@@ -422,14 +419,22 @@ static void rrpc_block_gc(struct work_struct *work)
 	struct rrpc_block *rblk = gcb->rblk;
 	struct rrpc_lun *rlun = rblk->rlun;
 	struct nvm_tgt_dev *dev = rrpc->dev;
+	struct ppa_addr ppa;
 
 	mempool_free(gcb, rrpc->gcb_pool);
-	pr_debug("nvm: block '%lu' being reclaimed\n", rblk->parent->id);
+	pr_debug("nvm: block 'ch:%d,lun:%d,blk:%d' being reclaimed\n",
+			rlun->parent->chnl_id, rlun->parent->lun_id,
+			rblk->id);
 
 	if (rrpc_move_valid_pages(rrpc, rblk))
 		goto put_back;
 
-	if (nvm_erase_blk(dev->parent, rblk->parent, 0))
+	ppa.ppa = 0;
+	ppa.g.ch = rlun->parent->chnl_id;
+	ppa.g.lun = rlun->parent->lun_id;
+	ppa.g.blk = rblk->id;
+
+	if (nvm_erase_blk(dev->parent, &ppa, 0))
 		goto put_back;
 
 	rrpc_put_blk(rrpc, rblk);
@@ -445,7 +450,7 @@ static void rrpc_block_gc(struct work_struct *work)
 /* the block with highest number of invalid pages, will be in the beginning
  * of the list
  */
-static struct rrpc_block *rblock_max_invalid(struct rrpc_block *ra,
+static struct rrpc_block *rblk_max_invalid(struct rrpc_block *ra,
 							struct rrpc_block *rb)
 {
 	if (ra->nr_invalid_pages == rb->nr_invalid_pages)
@@ -460,13 +465,13 @@ static struct rrpc_block *rblock_max_invalid(struct rrpc_block *ra,
 static struct rrpc_block *block_prio_find_max(struct rrpc_lun *rlun)
 {
 	struct list_head *prio_list = &rlun->prio_list;
-	struct rrpc_block *rblock, *max;
+	struct rrpc_block *rblk, *max;
 
 	BUG_ON(list_empty(prio_list));
 
 	max = list_first_entry(prio_list, struct rrpc_block, prio);
-	list_for_each_entry(rblock, prio_list, prio)
-		max = rblock_max_invalid(max, rblock);
+	list_for_each_entry(rblk, prio_list, prio)
+		max = rblk_max_invalid(max, rblk);
 
 	return max;
 }
@@ -476,7 +481,6 @@ static void rrpc_lun_gc(struct work_struct *work)
 	struct rrpc_lun *rlun = container_of(work, struct rrpc_lun, ws_gc);
 	struct rrpc *rrpc = rlun->rrpc;
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvm_lun *lun = rlun->parent;
 	struct rrpc_block_gc *gcb;
 	unsigned int nr_blocks_need;
 
@@ -486,26 +490,28 @@ static void rrpc_lun_gc(struct work_struct *work)
 		nr_blocks_need = rrpc->nr_luns;
 
 	spin_lock(&rlun->lock);
-	while (nr_blocks_need > lun->nr_free_blocks &&
+	while (nr_blocks_need > rlun->nr_free_blocks &&
 					!list_empty(&rlun->prio_list)) {
-		struct rrpc_block *rblock = block_prio_find_max(rlun);
-		struct nvm_block *block = rblock->parent;
+		struct rrpc_block *rblk = block_prio_find_max(rlun);
 
-		if (!rblock->nr_invalid_pages)
+		if (!rblk->nr_invalid_pages)
 			break;
 
 		gcb = mempool_alloc(rrpc->gcb_pool, GFP_ATOMIC);
 		if (!gcb)
 			break;
 
-		list_del_init(&rblock->prio);
+		list_del_init(&rblk->prio);
 
-		BUG_ON(!block_is_full(rrpc, rblock));
+		WARN_ON(!block_is_full(rrpc, rblk));
 
-		pr_debug("rrpc: selected block '%lu' for GC\n", block->id);
+		pr_debug("rrpc: selected block 'ch:%d,lun:%d,blk:%d' for GC\n",
+					rlun->parent->chnl_id,
+					rlun->parent->lun_id,
+					rblk->id);
 
 		gcb->rrpc = rrpc;
-		gcb->rblk = rblock;
+		gcb->rblk = rblk;
 		INIT_WORK(&gcb->ws_gc, rrpc_block_gc);
 
 		queue_work(rrpc->kgc_wq, &gcb->ws_gc);
@@ -530,8 +536,10 @@ static void rrpc_gc_queue(struct work_struct *work)
 	spin_unlock(&rlun->lock);
 
 	mempool_free(gcb, rrpc->gcb_pool);
-	pr_debug("nvm: block '%lu' is full, allow GC (sched)\n",
-							rblk->parent->id);
+	pr_debug("nvm: block 'ch:%d,lun:%d,blk:%d' full, allow GC (sched)\n",
+					rlun->parent->chnl_id,
+					rlun->parent->lun_id,
+					rblk->id);
 }
 
 static const struct block_device_operations rrpc_fops = {
@@ -555,8 +563,7 @@ static struct rrpc_lun *rrpc_get_lun_rr(struct rrpc *rrpc, int is_gc)
 	 * estimate.
 	 */
 	rrpc_for_each_lun(rrpc, rlun, i) {
-		if (rlun->parent->nr_free_blocks >
-					max_free->parent->nr_free_blocks)
+		if (rlun->nr_free_blocks > max_free->nr_free_blocks)
 			max_free = rlun;
 	}
 
@@ -613,14 +620,12 @@ static struct rrpc_addr *rrpc_map_page(struct rrpc *rrpc, sector_t laddr,
 {
 	struct rrpc_lun *rlun;
 	struct rrpc_block *rblk, **cur_rblk;
-	struct nvm_lun *lun;
 	u64 paddr;
 	int gc_force = 0;
 
 	rlun = rrpc_get_lun_rr(rrpc, is_gc);
-	lun = rlun->parent;
 
-	if (!is_gc && lun->nr_free_blocks < rrpc->nr_luns * 4)
+	if (!is_gc && rlun->nr_free_blocks < rrpc->nr_luns * 4)
 		return NULL;
 
 	/*
@@ -701,22 +706,44 @@ static void rrpc_run_gc(struct rrpc *rrpc, struct rrpc_block *rblk)
 	queue_work(rrpc->kgc_wq, &gcb->ws_gc);
 }
 
-static void __rrpc_mark_bad_block(struct nvm_tgt_dev *dev, struct ppa_addr *ppa)
+static struct rrpc_lun *rrpc_ppa_to_lun(struct rrpc *rrpc, struct ppa_addr p)
 {
-		nvm_mark_blk(dev->parent, *ppa, NVM_BLK_ST_BAD);
-		nvm_set_bb_tbl(dev->parent, ppa, 1, NVM_BLK_T_GRWN_BAD);
+	struct rrpc_lun *rlun = NULL;
+	int i;
+
+	for (i = 0; i < rrpc->nr_luns; i++) {
+		if (rrpc->luns[i].parent->chnl_id == p.g.ch &&
+				rrpc->luns[i].parent->lun_id == p.g.lun) {
+			rlun = &rrpc->luns[i];
+			break;
+		}
+	}
+
+	return rlun;
+}
+
+static void __rrpc_mark_bad_block(struct rrpc *rrpc, struct ppa_addr ppa)
+{
+	struct nvm_tgt_dev *dev = rrpc->dev;
+	struct rrpc_lun *rlun;
+	struct rrpc_block *rblk;
+
+	rlun = rrpc_ppa_to_lun(rrpc, ppa);
+	rblk = &rlun->blocks[ppa.g.blk];
+	rblk->state = NVM_BLK_ST_BAD;
+
+	nvm_set_bb_tbl(dev->parent, &ppa, 1, NVM_BLK_T_GRWN_BAD);
 }
 
 static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd)
 {
-	struct nvm_tgt_dev *dev = rrpc->dev;
 	void *comp_bits = &rqd->ppa_status;
 	struct ppa_addr ppa, prev_ppa;
 	int nr_ppas = rqd->nr_ppas;
 	int bit;
 
 	if (rqd->nr_ppas == 1)
-		__rrpc_mark_bad_block(dev, &rqd->ppa_addr);
+		__rrpc_mark_bad_block(rrpc, rqd->ppa_addr);
 
 	ppa_set_empty(&prev_ppa);
 	bit = -1;
@@ -725,7 +752,7 @@ static void rrpc_mark_bad_block(struct rrpc *rrpc, struct nvm_rq *rqd)
 		if (ppa_cmp_blk(ppa, prev_ppa))
 			continue;
 
-		__rrpc_mark_bad_block(dev, &ppa);
+		__rrpc_mark_bad_block(rrpc, ppa);
 	}
 }
 
@@ -735,13 +762,11 @@ static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_addr *p;
 	struct rrpc_block *rblk;
-	struct nvm_lun *lun;
 	int cmnt_size, i;
 
 	for (i = 0; i < npages; i++) {
 		p = &rrpc->trans_map[laddr + i];
 		rblk = p->rblk;
-		lun = rblk->parent->lun;
 
 		cmnt_size = atomic_inc_return(&rblk->data_cmnt_size);
 		if (unlikely(cmnt_size == dev->geo.sec_per_blk))
@@ -1061,16 +1086,21 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_addr *addr = rrpc->trans_map + slba;
 	struct rrpc_rev_addr *raddr = rrpc->rev_trans_map;
+	struct rrpc_lun *rlun;
+	struct rrpc_block *rblk;
 	u64 i;
 
 	for (i = 0; i < nlb; i++) {
+		struct ppa_addr gaddr;
 		u64 pba = le64_to_cpu(entries[i]);
 		unsigned int mod;
+
 		/* LNVM treats address-spaces as silos, LBA and PBA are
 		 * equally large and zero-indexed.
 		 */
 		if (unlikely(pba >= dev->total_secs && pba != U64_MAX)) {
 			pr_err("nvm: L2P data entry is out of bounds!\n");
+			pr_err("nvm: Maybe loaded an old target L2P\n");
 			return -EINVAL;
 		}
 
@@ -1085,6 +1115,25 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 		addr[i].addr = pba;
 		raddr[mod].addr = slba + i;
+
+		gaddr = rrpc_ppa_to_gaddr(dev, pba);
+		rlun = rrpc_ppa_to_lun(rrpc, gaddr);
+		if (!rlun) {
+			pr_err("rrpc: unmapped lun %d l2p corruption\n",
+							rlun->parent->id);
+			return -EINVAL;
+		}
+
+		rblk = &rlun->blocks[gaddr.g.blk];
+		if (!rblk->state) {
+			/* at this point, we don't know anything about the
+			 * block. It's up to the FTL on top to re-etablish the
+			 * block state. The block is assumed to be open.
+			 */
+			list_move_tail(&rblk->list, &rlun->used_list);
+			rblk->state = NVM_BLK_ST_TGT;
+			rlun->nr_free_blocks--;
+		}
 	}
 
 	return 0;
@@ -1199,6 +1248,52 @@ static void rrpc_luns_free(struct rrpc *rrpc)
 	kfree(rrpc->luns);
 }
 
+static int rrpc_bb_discovery(struct nvm_tgt_dev *dev, struct rrpc_lun *rlun)
+{
+	struct nvm_geo *geo = &dev->geo;
+	struct rrpc_block *rblk;
+	struct ppa_addr ppa;
+	u8 *blks;
+	int nr_blks;
+	int i;
+	int ret;
+
+	nr_blks = geo->blks_per_lun * geo->plane_mode;
+	blks = kmalloc(nr_blks, GFP_KERNEL);
+	if (!blks)
+		return -ENOMEM;
+
+	ppa.ppa = 0;
+	ppa.g.ch = rlun->parent->chnl_id;
+	ppa.g.lun = rlun->parent->lun_id;
+
+	ret = nvm_get_bb_tbl(dev->parent, ppa, blks);
+	if (ret) {
+		pr_err("rrpc: could not get BB table\n");
+		kfree(blks);
+		goto out;
+	}
+
+	nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks);
+	if (nr_blks < 0)
+		return nr_blks;
+
+	rlun->nr_free_blocks = geo->blks_per_lun;
+	for (i = 0; i < nr_blks; i++) {
+		if (blks[i] == NVM_BLK_T_FREE)
+			continue;
+
+		rblk = &rlun->blocks[i];
+		list_move_tail(&rblk->list, &rlun->bb_list);
+		rblk->state = NVM_BLK_ST_BAD;
+		rlun->nr_free_blocks--;
+	}
+
+out:
+	kfree(blks);
+	return ret;
+}
+
 static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
@@ -1232,16 +1327,26 @@ static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
 			goto err;
 		}
 
+		INIT_LIST_HEAD(&rlun->free_list);
+		INIT_LIST_HEAD(&rlun->used_list);
+		INIT_LIST_HEAD(&rlun->bb_list);
+
 		for (j = 0; j < geo->blks_per_lun; j++) {
 			struct rrpc_block *rblk = &rlun->blocks[j];
-			struct nvm_block *blk = &lun->blocks[j];
 
-			rblk->parent = blk;
+			rblk->id = j;
 			rblk->rlun = rlun;
+			rblk->state = NVM_BLK_T_FREE;
 			INIT_LIST_HEAD(&rblk->prio);
+			INIT_LIST_HEAD(&rblk->list);
 			spin_lock_init(&rblk->lock);
+
+			list_add_tail(&rblk->list, &rlun->free_list);
 		}
 
+		if (rrpc_bb_discovery(dev, rlun))
+			goto err;
+
 		rlun->reserved_blocks = 2; /* for GC only */
 
 		rlun->rrpc = rrpc;
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index 242d4c1..c55cec9 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -52,8 +52,7 @@ struct rrpc_rq {
 };
 
 struct rrpc_block {
-	unsigned long id;
-	struct nvm_block *parent;
+	int id;				/* id inside of LUN */
 	struct rrpc_lun *rlun;
 
 	struct list_head prio;		/* LUN CG list */
@@ -83,6 +82,16 @@ struct rrpc_lun {
 	struct list_head prio_list;	/* Blocks that may be GC'ed */
 	struct list_head wblk_list;	/* Queued blocks to be written to */
 
+	/* lun block lists */
+	struct list_head used_list;	/* In-use blocks */
+	struct list_head free_list;	/* Not used blocks i.e. released
+					 * and ready for use
+					 */
+	struct list_head bb_list;	/* Bad blocks. Mutually exclusive with
+					 * free_list and used_list
+					 */
+	unsigned int nr_free_blocks;	/* Number of unused blocks */
+
 	struct work_struct ws_gc;
 
 	int reserved_blocks;
@@ -155,14 +164,14 @@ struct rrpc_rev_addr {
 	u64 addr;
 };
 
-static inline struct rrpc_block *rrpc_get_rblk(struct rrpc_lun *rlun,
-								int blk_id)
+static inline u64 rrpc_blk_to_ppa(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
-	struct rrpc *rrpc = rlun->rrpc;
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	int lun_blk = blk_id % dev->geo.blks_per_lun;
+	struct nvm_geo *geo = &dev->geo;
+	struct rrpc_lun *rlun = rblk->rlun;
+	struct nvm_lun *lun = rlun->parent;
 
-	return &rlun->blocks[lun_blk];
+	return (lun->id * geo->sec_per_lun) + (rblk->id * geo->sec_per_blk);
 }
 
 static inline sector_t rrpc_get_laddr(struct bio *bio)
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index ed04fa6..cc210cc 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -266,8 +266,6 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
 	return rqdata + 1;
 }
 
-struct nvm_block;
-
 struct nvm_lun {
 	int id;
 
@@ -275,19 +273,6 @@ struct nvm_lun {
 	int chnl_id;
 
 	struct list_head list;
-	spinlock_t lock;
-
-	/* lun block lists */
-	struct list_head used_list;	/* In-use blocks */
-	struct list_head free_list;	/* Not used blocks i.e. released
-					 * and ready for use
-					 */
-	struct list_head bb_list;	/* Bad blocks. Mutually exclusive with
-					 * free_list and used_list
-					 */
-	unsigned int nr_free_blocks;	/* Number of unused blocks */
-
-	struct nvm_block *blocks;
 };
 
 enum {
@@ -296,15 +281,6 @@ enum {
 	NVM_BLK_ST_BAD =	0x8,	/* Bad block */
 };
 
-struct nvm_block {
-	struct list_head list;
-	struct nvm_lun *lun;
-	unsigned long id;
-
-	void *priv;
-	int state;
-};
-
 /* system block cpu representation */
 struct nvm_sb_info {
 	unsigned long		seqnr;
@@ -473,21 +449,6 @@ static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
 	ppa_addr->ppa = ADDR_EMPTY;
 }
 
-static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
-							struct nvm_block *blk)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct ppa_addr ppa;
-	struct nvm_lun *lun = blk->lun;
-
-	ppa.ppa = 0;
-	ppa.g.blk = blk->id % geo->blks_per_lun;
-	ppa.g.lun = lun->lun_id;
-	ppa.g.ch = lun->chnl_id;
-
-	return ppa;
-}
-
 static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
 {
 	if (ppa_empty(ppa1) || ppa_empty(ppa2))
@@ -539,8 +500,7 @@ typedef void (nvmm_unregister_fn)(struct nvm_dev *);
 typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
 typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
-typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, int);
-typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
+typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct ppa_addr *, int);
 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
 typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
 
@@ -557,9 +517,6 @@ struct nvmm_type {
 	nvmm_submit_io_fn *submit_io;
 	nvmm_erase_blk_fn *erase_blk;
 
-	/* Bad block mgmt */
-	nvmm_mark_blk_fn *mark_blk;
-
 	nvmm_get_area_fn *get_area;
 	nvmm_put_area_fn *put_area;
 
@@ -573,7 +530,6 @@ extern struct nvm_dev *nvm_alloc_dev(int);
 extern int nvm_register(struct nvm_dev *);
 extern void nvm_unregister(struct nvm_dev *);
 
-extern void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
 extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas,
 							int nr_ppas, int type);
 
@@ -584,7 +540,7 @@ extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
 					const struct ppa_addr *, int, int);
 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
-extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *, int);
+extern int nvm_erase_blk(struct nvm_dev *, struct ppa_addr *, int);
 extern void nvm_end_io(struct nvm_rq *, int);
 extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
 								void *, int);
-- 
2.7.4

[PATCH 17/20] lightnvm: eliminate nvm_lun abstraction in mm

[Javier González]

In order to naturally support multi-target instances on an Open-Channel
SSD, targets should own the LUNs they get blocks from and manage
provisioning internally. This is done in several steps.

Since targets own the LUNs the are instantiated on top of and manage the
free block list internally, there is no need for a LUN abstraction in
the media manager. LUNs are intrinsically managed as in the physical
layout (ch:0,lun:0, ..., ch:0,lun:n, ch:1,lun:0, ch:1,lun:n, ...,
ch:m,lun:0, ch:m,lun:n) and given to the targets based on the target
creation ioctl. This simplifies LUN management and clears the path for a
partition manager to sit directly underneath LightNVM targets.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c      |  14 +-
 drivers/lightnvm/gennvm.c    | 336 ++++++++++++++++++++++++++++++++++---------
 drivers/lightnvm/gennvm.h    |  20 ++-
 drivers/lightnvm/rrpc.c      | 142 +++++++++---------
 drivers/lightnvm/rrpc.h      |  32 ++++-
 drivers/nvme/host/lightnvm.c |   3 +
 include/linux/lightnvm.h     |  41 +++---
 7 files changed, 422 insertions(+), 166 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 691b16f..23d582f 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -203,15 +203,19 @@ int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
 }
 EXPORT_SYMBOL(nvm_set_bb_tbl);
 
-int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
+int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
-	return dev->mt->submit_io(dev, rqd);
+	struct nvm_dev *dev = tgt_dev->parent;
+
+	return dev->mt->submit_io(tgt_dev, rqd);
 }
 EXPORT_SYMBOL(nvm_submit_io);
 
-int nvm_erase_blk(struct nvm_dev *dev, struct ppa_addr *p, int flags)
+int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags)
 {
-	return dev->mt->erase_blk(dev, p, flags);
+	struct nvm_dev *dev = tgt_dev->parent;
+
+	return dev->mt->erase_blk(tgt_dev, p, flags);
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
@@ -350,7 +354,7 @@ static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
 
 	nvm_generic_to_addr_mode(dev, rqd);
 
-	rqd->dev = dev;
+	rqd->dev = NULL;
 	rqd->opcode = opcode;
 	rqd->flags = flags;
 	rqd->bio = bio;
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 19c3924..5d7c8c4 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -38,8 +38,6 @@ static const struct block_device_operations gen_fops = {
 static int gen_reserve_luns(struct nvm_dev *dev, struct nvm_target *t,
 			    int lun_begin, int lun_end)
 {
-	struct gen_dev *gn = dev->mp;
-	struct nvm_lun *lun;
 	int i;
 
 	for (i = lun_begin; i <= lun_end; i++) {
@@ -47,35 +45,50 @@ static int gen_reserve_luns(struct nvm_dev *dev, struct nvm_target *t,
 			pr_err("nvm: lun %d already allocated\n", i);
 			goto err;
 		}
-
-		lun = &gn->luns[i];
-		list_add_tail(&lun->list, &t->lun_list);
 	}
 
 	return 0;
 
 err:
-	while (--i > lun_begin) {
-		lun = &gn->luns[i];
+	while (--i > lun_begin)
 		clear_bit(i, dev->lun_map);
-		list_del(&lun->list);
-	}
 
 	return -EBUSY;
 }
 
-static void gen_release_luns(struct nvm_dev *dev, struct nvm_target *t)
+static void gen_release_luns_err(struct nvm_dev *dev, int lun_begin,
+				 int lun_end)
 {
-	struct nvm_lun *lun, *tmp;
+	int i;
 
-	list_for_each_entry_safe(lun, tmp, &t->lun_list, list) {
-		WARN_ON(!test_and_clear_bit(lun->id, dev->lun_map));
-		list_del(&lun->list);
-	}
+	for (i = lun_begin; i <= lun_end; i++)
+		WARN_ON(!test_and_clear_bit(i, dev->lun_map));
 }
 
 static void gen_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev)
 {
+	struct nvm_dev *dev = tgt_dev->parent;
+	struct gen_dev_map *dev_map = tgt_dev->map;
+	int i, j;
+
+	for (i = 0; i < dev_map->nr_chnls; i++) {
+		struct gen_ch_map *ch_map = &dev_map->chnls[i];
+		int *lun_offs = ch_map->lun_offs;
+		int ch = i + ch_map->ch_off;
+
+		for (j = 0; j < ch_map->nr_luns; j++) {
+			int lun = j + lun_offs[j];
+			int lunid = (ch * dev->geo.luns_per_chnl) + lun;
+
+			WARN_ON(!test_and_clear_bit(lunid, dev->lun_map));
+		}
+
+		kfree(ch_map->lun_offs);
+	}
+
+	kfree(dev_map->chnls);
+	kfree(dev_map);
+	kfree(tgt_dev->luns);
 	kfree(tgt_dev);
 }
 
@@ -83,24 +96,103 @@ static struct nvm_tgt_dev *gen_create_tgt_dev(struct nvm_dev *dev,
 					      int lun_begin, int lun_end)
 {
 	struct nvm_tgt_dev *tgt_dev = NULL;
+	struct gen_dev_map *dev_rmap = dev->rmap;
+	struct gen_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.luns_per_chnl;
+	int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl;
+	int bch = lun_begin / dev->geo.luns_per_chnl;
+	int blun = lun_begin % dev->geo.luns_per_chnl;
+	int lunid = 0;
+	int lun_balanced = 1;
+	int prev_nr_luns;
+	int i, j;
+
+	nr_chnls = nr_luns / dev->geo.luns_per_chnl;
+	nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1;
+
+	dev_map = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL);
+	if (!dev_map)
+		goto err_dev;
+
+	dev_map->chnls = kcalloc(nr_chnls, sizeof(struct gen_ch_map),
+								GFP_KERNEL);
+	if (!dev_map->chnls)
+		goto err_chnls;
+
+	luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL);
+	if (!luns)
+		goto err_luns;
+
+	prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ?
+					dev->geo.luns_per_chnl : luns_left;
+	for (i = 0; i < nr_chnls; i++) {
+		struct gen_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
+		int *lun_roffs = ch_rmap->lun_offs;
+		struct gen_ch_map *ch_map = &dev_map->chnls[i];
+		int *lun_offs;
+		int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ?
+					dev->geo.luns_per_chnl : luns_left;
+
+		if (lun_balanced && prev_nr_luns != luns_in_chnl)
+			lun_balanced = 0;
+
+		ch_map->ch_off = ch_rmap->ch_off = bch;
+		ch_map->nr_luns = luns_in_chnl;
+
+		lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
+		if (!lun_offs)
+			goto err_ch;
+
+		for (j = 0; j < luns_in_chnl; j++) {
+			luns[lunid].ppa = 0;
+			luns[lunid].g.ch = i;
+			luns[lunid++].g.lun = j;
+
+			lun_offs[j] = blun;
+			lun_roffs[j + blun] = blun;
+		}
+
+		ch_map->lun_offs = lun_offs;
+
+		/* when starting a new channel, lun offset is reset */
+		blun = 0;
+		luns_left -= luns_in_chnl;
+	}
+
+	dev_map->nr_chnls = nr_chnls;
 
 	tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
 	if (!tgt_dev)
-		goto out;
+		goto err_ch;
 
 	memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
-	tgt_dev->geo.nr_chnls = (nr_luns / (dev->geo.luns_per_chnl + 1)) + 1;
+	/* Target device only owns a portion of the physical device */
+	tgt_dev->geo.nr_chnls = nr_chnls;
 	tgt_dev->geo.nr_luns = nr_luns;
+	tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1;
 	tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
 	tgt_dev->q = dev->q;
 	tgt_dev->ops = dev->ops;
 	tgt_dev->mt = dev->mt;
+	tgt_dev->map = dev_map;
+	tgt_dev->luns = luns;
 	memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
 
 	tgt_dev->parent = dev;
 
-out:
+	return tgt_dev;
+err_ch:
+	while (--i > 0)
+		kfree(dev_map->chnls[i].lun_offs);
+	kfree(luns);
+err_luns:
+	kfree(dev_map->chnls);
+err_chnls:
+	kfree(dev_map);
+err_dev:
 	return tgt_dev;
 }
 
@@ -134,14 +226,14 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	if (!t)
 		return -ENOMEM;
 
-	INIT_LIST_HEAD(&t->lun_list);
-
 	if (gen_reserve_luns(dev, t, s->lun_begin, s->lun_end))
 		goto err_t;
 
 	tgt_dev = gen_create_tgt_dev(dev, s->lun_begin, s->lun_end);
-	if (!tgt_dev)
+	if (!tgt_dev) {
+		pr_err("nvm: could not create target device\n");
 		goto err_reserve;
+	}
 
 	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
 	if (!tqueue)
@@ -159,7 +251,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	tdisk->fops = &gen_fops;
 	tdisk->queue = tqueue;
 
-	targetdata = tt->init(tgt_dev, tdisk, &t->lun_list);
+	targetdata = tt->init(tgt_dev, tdisk);
 	if (IS_ERR(targetdata))
 		goto err_init;
 
@@ -187,7 +279,7 @@ static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 err_dev:
 	kfree(tgt_dev);
 err_reserve:
-	gen_release_luns(dev, t);
+	gen_release_luns_err(dev, s->lun_begin, s->lun_end);
 err_t:
 	kfree(t);
 	return -ENOMEM;
@@ -205,7 +297,6 @@ static void __gen_remove_target(struct nvm_target *t)
 	if (tt->exit)
 		tt->exit(tdisk->private_data);
 
-	gen_release_luns(t->dev->parent, t);
 	gen_remove_tgt_dev(t->dev);
 	put_disk(tdisk);
 
@@ -306,51 +397,54 @@ static void gen_put_area(struct nvm_dev *dev, sector_t begin)
 	spin_unlock(&dev->lock);
 }
 
-static void gen_luns_free(struct nvm_dev *dev)
-{
-	struct gen_dev *gn = dev->mp;
-
-	kfree(gn->luns);
-}
-
-static int gen_luns_init(struct nvm_dev *dev, struct gen_dev *gn)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_lun *lun;
-	int i;
-
-	gn->luns = kcalloc(geo->nr_luns, sizeof(struct nvm_lun), GFP_KERNEL);
-	if (!gn->luns)
-		return -ENOMEM;
-
-	gen_for_each_lun(gn, lun, i) {
-		INIT_LIST_HEAD(&lun->list);
-
-		lun->id = i;
-		lun->lun_id = i % geo->luns_per_chnl;
-		lun->chnl_id = i / geo->luns_per_chnl;
-	}
-	return 0;
-}
-
 static void gen_free(struct nvm_dev *dev)
 {
-	gen_luns_free(dev);
 	kfree(dev->mp);
+	kfree(dev->rmap);
 	dev->mp = NULL;
 }
 
 static int gen_register(struct nvm_dev *dev)
 {
 	struct gen_dev *gn;
-	int ret;
+	struct gen_dev_map *dev_rmap;
+	int i, j;
 
 	if (!try_module_get(THIS_MODULE))
 		return -ENODEV;
 
 	gn = kzalloc(sizeof(struct gen_dev), GFP_KERNEL);
 	if (!gn)
-		return -ENOMEM;
+		goto err_gn;
+
+	dev_rmap = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL);
+	if (!dev_rmap)
+		goto err_rmap;
+
+	dev_rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct gen_ch_map),
+								GFP_KERNEL);
+	if (!dev_rmap->chnls)
+		goto err_chnls;
+
+	for (i = 0; i < dev->geo.nr_chnls; i++) {
+		struct gen_ch_map *ch_rmap;
+		int *lun_roffs;
+		int luns_in_chnl = dev->geo.luns_per_chnl;
+
+		ch_rmap = &dev_rmap->chnls[i];
+
+		ch_rmap->ch_off = -1;
+		ch_rmap->nr_luns = luns_in_chnl;
+
+		lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
+		if (!lun_roffs)
+			goto err_ch;
+
+		for (j = 0; j < luns_in_chnl; j++)
+			lun_roffs[j] = -1;
+
+		ch_rmap->lun_offs = lun_roffs;
+	}
 
 	gn->dev = dev;
 	gn->nr_luns = dev->geo.nr_luns;
@@ -358,18 +452,19 @@ static int gen_register(struct nvm_dev *dev)
 	mutex_init(&gn->lock);
 	INIT_LIST_HEAD(&gn->targets);
 	dev->mp = gn;
-
-	ret = gen_luns_init(dev, gn);
-	if (ret) {
-		pr_err("gen: could not initialize luns\n");
-		goto err;
-	}
+	dev->rmap = dev_rmap;
 
 	return 1;
-err:
+err_ch:
+	while (--i >= 0)
+		kfree(dev_rmap->chnls[i].lun_offs);
+err_chnls:
+	kfree(dev_rmap);
+err_rmap:
 	gen_free(dev);
+err_gn:
 	module_put(THIS_MODULE);
-	return ret;
+	return -ENOMEM;
 }
 
 static void gen_unregister(struct nvm_dev *dev)
@@ -389,29 +484,137 @@ static void gen_unregister(struct nvm_dev *dev)
 	module_put(THIS_MODULE);
 }
 
+enum {
+	TRANS_TGT_TO_DEV =	0x0,
+	TRANS_DEV_TO_TGT =	0x1,
+};
+
+
+static int gen_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
+{
+	struct gen_dev_map *dev_map = tgt_dev->map;
+	struct gen_ch_map *ch_map = &dev_map->chnls[p->g.ch];
+	int lun_off = ch_map->lun_offs[p->g.lun];
+	struct nvm_dev *dev = tgt_dev->parent;
+	struct gen_dev_map *dev_rmap = dev->rmap;
+	struct gen_ch_map *ch_rmap;
+	int lun_roff;
+
+	p->g.ch += ch_map->ch_off;
+	p->g.lun += lun_off;
+
+	ch_rmap = &dev_rmap->chnls[p->g.ch];
+	lun_roff = ch_rmap->lun_offs[p->g.lun];
+
+	if (unlikely(ch_rmap->ch_off < 0 || lun_roff < 0)) {
+		pr_err("nvm: corrupted device partition table\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int gen_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
+{
+	struct nvm_dev *dev = tgt_dev->parent;
+	struct gen_dev_map *dev_rmap = dev->rmap;
+	struct gen_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch];
+	int lun_roff = ch_rmap->lun_offs[p->g.lun];
+
+	p->g.ch -= ch_rmap->ch_off;
+	p->g.lun -= lun_roff;
+
+	return 0;
+}
+
+static int gen_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
+			int flag)
+{
+	gen_trans_fn *f;
+	int i;
+	int ret = 0;
+
+	f = (flag == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt;
+
+	if (rqd->nr_ppas == 1)
+		return f(tgt_dev, &rqd->ppa_addr);
+
+	for (i = 0; i < rqd->nr_ppas; i++) {
+		ret = f(tgt_dev, &rqd->ppa_list[i]);
+		if (ret)
+			goto out;
+	}
+
+out:
+	return ret;
+}
+
 static void gen_end_io(struct nvm_rq *rqd)
 {
+	struct nvm_tgt_dev *tgt_dev = rqd->dev;
 	struct nvm_tgt_instance *ins = rqd->ins;
 
+	/* Convert address space */
+	if (tgt_dev)
+		gen_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT);
+
 	ins->tt->end_io(rqd);
 }
 
-static int gen_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
+static int gen_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
+	struct nvm_dev *dev = tgt_dev->parent;
+
 	if (!dev->ops->submit_io)
 		return -ENODEV;
 
 	/* Convert address space */
+	gen_trans_rq(tgt_dev, rqd, TRANS_TGT_TO_DEV);
 	nvm_generic_to_addr_mode(dev, rqd);
 
-	rqd->dev = dev;
+	rqd->dev = tgt_dev;
 	rqd->end_io = gen_end_io;
 	return dev->ops->submit_io(dev, rqd);
 }
 
-static int gen_erase_blk(struct nvm_dev *dev, struct ppa_addr *p, int flags)
+static int gen_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p,
+			 int flags)
 {
-	return nvm_erase_ppa(dev, p, 1, flags);
+	/* Convert address space */
+	gen_map_to_dev(tgt_dev, p);
+
+	return nvm_erase_ppa(tgt_dev->parent, p, 1, flags);
+}
+
+static void gen_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
+			       int len)
+{
+	struct nvm_geo *geo = &dev->geo;
+	struct gen_dev_map *dev_rmap = dev->rmap;
+	u64 i;
+
+	for (i = 0; i < len; i++) {
+		struct gen_ch_map *ch_rmap;
+		int *lun_roffs;
+		struct ppa_addr gaddr;
+		u64 pba = le64_to_cpu(entries[i]);
+		int off;
+		u64 diff;
+
+		if (!pba)
+			continue;
+
+		gaddr = linear_to_generic_addr(geo, pba);
+		ch_rmap = &dev_rmap->chnls[gaddr.g.ch];
+		lun_roffs = ch_rmap->lun_offs;
+
+		off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun;
+
+		diff = ((ch_rmap->ch_off * geo->luns_per_chnl) +
+				(lun_roffs[gaddr.g.lun])) * geo->sec_per_lun;
+
+		entries[i] -= cpu_to_le64(diff);
+	}
 }
 
 static struct nvmm_type gen = {
@@ -430,6 +633,7 @@ static struct nvmm_type gen = {
 	.get_area		= gen_get_area,
 	.put_area		= gen_put_area,
 
+	.part_to_tgt		= gen_part_to_tgt,
 };
 
 static int __init gen_module_init(void)
diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h
index d167f39..6a4b3f3 100644
--- a/drivers/lightnvm/gennvm.h
+++ b/drivers/lightnvm/gennvm.h
@@ -24,19 +24,37 @@ struct gen_dev {
 	struct nvm_dev *dev;
 
 	int nr_luns;
-	struct nvm_lun *luns;
 	struct list_head area_list;
 
 	struct mutex lock;
 	struct list_head targets;
 };
 
+/* Map between virtual and physical channel and lun */
+struct gen_ch_map {
+	int ch_off;
+	int nr_luns;
+	int *lun_offs;
+};
+
+struct gen_dev_map {
+	struct gen_ch_map *chnls;
+	int nr_chnls;
+};
+
 struct gen_area {
 	struct list_head list;
 	sector_t begin;
 	sector_t end;	/* end is excluded */
 };
 
+static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map)
+{
+	return ch_map + 1;
+}
+
+typedef int (gen_trans_fn)(struct nvm_tgt_dev *, struct ppa_addr *);
+
 #define gen_for_each_lun(bm, lun, i) \
 		for ((i) = 0, lun = &(bm)->luns[0]; \
 			(i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index fad117b..08a633c 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -45,7 +45,7 @@ static void rrpc_page_invalidate(struct rrpc *rrpc, struct rrpc_addr *a)
 
 	spin_unlock(&rblk->lock);
 
-	rrpc->rev_trans_map[a->addr - rrpc->poffset].addr = ADDR_EMPTY;
+	rrpc->rev_trans_map[a->addr].addr = ADDR_EMPTY;
 }
 
 static void rrpc_invalidate_range(struct rrpc *rrpc, sector_t slba,
@@ -127,28 +127,25 @@ static u64 block_to_rel_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_lun *rlun = rblk->rlun;
-	struct nvm_lun *lun = rlun->parent;
 
-	return lun->id * dev->geo.sec_per_blk;
+	return rlun->id * dev->geo.sec_per_blk;
 }
 
-/* Calculate global addr for the given block */
-static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
+static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_tgt_dev *dev,
+					 struct rrpc_addr *gp)
 {
-	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvm_geo *geo = &dev->geo;
+	struct rrpc_block *rblk = gp->rblk;
 	struct rrpc_lun *rlun = rblk->rlun;
-	struct nvm_lun *lun = rlun->parent;
-
-	return lun->id * geo->sec_per_lun + rblk->id * geo->sec_per_blk;
-}
-
-static struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_tgt_dev *dev, u64 addr)
-{
+	u64 addr = gp->addr;
 	struct ppa_addr paddr;
 
 	paddr.ppa = addr;
-	return linear_to_generic_addr(&dev->geo, paddr);
+	paddr = rrpc_linear_to_generic_addr(&dev->geo, paddr);
+	paddr.g.ch = rlun->bppa.g.ch;
+	paddr.g.lun = rlun->bppa.g.lun;
+	paddr.g.blk = rblk->id;
+
+	return paddr;
 }
 
 /* requires lun->lock taken */
@@ -216,7 +213,6 @@ static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
 static void rrpc_put_blk(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
 	struct rrpc_lun *rlun = rblk->rlun;
-	struct nvm_lun *lun = rlun->parent;
 
 	spin_lock(&rlun->lock);
 	if (rblk->state & NVM_BLK_ST_TGT) {
@@ -229,8 +225,8 @@ static void rrpc_put_blk(struct rrpc *rrpc, struct rrpc_block *rblk)
 	} else {
 		WARN_ON_ONCE(1);
 		pr_err("rrpc: erroneous type (ch:%d,lun:%d,blk%d-> %u)\n",
-						lun->chnl_id, lun->lun_id,
-						rblk->id, rblk->state);
+					rlun->bppa.g.ch, rlun->bppa.g.lun,
+					rblk->id, rblk->state);
 		list_move_tail(&rblk->list, &rlun->bb_list);
 	}
 	spin_unlock(&rlun->lock);
@@ -336,7 +332,7 @@ static int rrpc_move_valid_pages(struct rrpc *rrpc, struct rrpc_block *rblk)
 try:
 		spin_lock(&rrpc->rev_lock);
 		/* Get logical address from physical to logical table */
-		rev = &rrpc->rev_trans_map[phys_addr - rrpc->poffset];
+		rev = &rrpc->rev_trans_map[phys_addr];
 		/* already updated by previous regular write */
 		if (rev->addr == ADDR_EMPTY) {
 			spin_unlock(&rrpc->rev_lock);
@@ -423,18 +419,18 @@ static void rrpc_block_gc(struct work_struct *work)
 
 	mempool_free(gcb, rrpc->gcb_pool);
 	pr_debug("nvm: block 'ch:%d,lun:%d,blk:%d' being reclaimed\n",
-			rlun->parent->chnl_id, rlun->parent->lun_id,
+			rlun->bppa.g.ch, rlun->bppa.g.lun,
 			rblk->id);
 
 	if (rrpc_move_valid_pages(rrpc, rblk))
 		goto put_back;
 
 	ppa.ppa = 0;
-	ppa.g.ch = rlun->parent->chnl_id;
-	ppa.g.lun = rlun->parent->lun_id;
+	ppa.g.ch = rlun->bppa.g.ch;
+	ppa.g.lun = rlun->bppa.g.lun;
 	ppa.g.blk = rblk->id;
 
-	if (nvm_erase_blk(dev->parent, &ppa, 0))
+	if (nvm_erase_blk(dev, &ppa, 0))
 		goto put_back;
 
 	rrpc_put_blk(rrpc, rblk);
@@ -506,8 +502,7 @@ static void rrpc_lun_gc(struct work_struct *work)
 		WARN_ON(!block_is_full(rrpc, rblk));
 
 		pr_debug("rrpc: selected block 'ch:%d,lun:%d,blk:%d' for GC\n",
-					rlun->parent->chnl_id,
-					rlun->parent->lun_id,
+					rlun->bppa.g.ch, rlun->bppa.g.lun,
 					rblk->id);
 
 		gcb->rrpc = rrpc;
@@ -537,8 +532,7 @@ static void rrpc_gc_queue(struct work_struct *work)
 
 	mempool_free(gcb, rrpc->gcb_pool);
 	pr_debug("nvm: block 'ch:%d,lun:%d,blk:%d' full, allow GC (sched)\n",
-					rlun->parent->chnl_id,
-					rlun->parent->lun_id,
+					rlun->bppa.g.ch, rlun->bppa.g.lun,
 					rblk->id);
 }
 
@@ -586,7 +580,7 @@ static struct rrpc_addr *rrpc_update_map(struct rrpc *rrpc, sector_t laddr,
 	gp->addr = paddr;
 	gp->rblk = rblk;
 
-	rev = &rrpc->rev_trans_map[gp->addr - rrpc->poffset];
+	rev = &rrpc->rev_trans_map[gp->addr];
 	rev->addr = laddr;
 	spin_unlock(&rrpc->rev_lock);
 
@@ -601,7 +595,7 @@ static u64 rrpc_alloc_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
 	if (block_is_full(rrpc, rblk))
 		goto out;
 
-	addr = block_to_addr(rrpc, rblk) + rblk->next_page;
+	addr = rblk->next_page;
 
 	rblk->next_page++;
 out:
@@ -615,18 +609,22 @@ static u64 rrpc_alloc_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
  * Returns rrpc_addr with the physical address and block. Returns NULL if no
  * blocks in the next rlun are available.
  */
-static struct rrpc_addr *rrpc_map_page(struct rrpc *rrpc, sector_t laddr,
+static struct ppa_addr rrpc_map_page(struct rrpc *rrpc, sector_t laddr,
 								int is_gc)
 {
+	struct nvm_tgt_dev *tgt_dev = rrpc->dev;
 	struct rrpc_lun *rlun;
 	struct rrpc_block *rblk, **cur_rblk;
+	struct rrpc_addr *p;
+	struct ppa_addr ppa;
 	u64 paddr;
 	int gc_force = 0;
 
+	ppa.ppa = ADDR_EMPTY;
 	rlun = rrpc_get_lun_rr(rrpc, is_gc);
 
 	if (!is_gc && rlun->nr_free_blocks < rrpc->nr_luns * 4)
-		return NULL;
+		return ppa;
 
 	/*
 	 * page allocation steps:
@@ -683,10 +681,15 @@ static struct rrpc_addr *rrpc_map_page(struct rrpc *rrpc, sector_t laddr,
 	}
 
 	pr_err("rrpc: failed to allocate new block\n");
-	return NULL;
+	return ppa;
 done:
 	spin_unlock(&rlun->lock);
-	return rrpc_update_map(rrpc, laddr, rblk, paddr);
+	p = rrpc_update_map(rrpc, laddr, rblk, paddr);
+	if (!p)
+		return ppa;
+
+	/* return global address */
+	return rrpc_ppa_to_gaddr(tgt_dev, p);
 }
 
 static void rrpc_run_gc(struct rrpc *rrpc, struct rrpc_block *rblk)
@@ -712,8 +715,8 @@ static struct rrpc_lun *rrpc_ppa_to_lun(struct rrpc *rrpc, struct ppa_addr p)
 	int i;
 
 	for (i = 0; i < rrpc->nr_luns; i++) {
-		if (rrpc->luns[i].parent->chnl_id == p.g.ch &&
-				rrpc->luns[i].parent->lun_id == p.g.lun) {
+		if (rrpc->luns[i].bppa.g.ch == p.g.ch &&
+				rrpc->luns[i].bppa.g.lun == p.g.lun) {
 			rlun = &rrpc->luns[i];
 			break;
 		}
@@ -823,7 +826,7 @@ static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 		gp = &rrpc->trans_map[laddr + i];
 
 		if (gp->rblk) {
-			rqd->ppa_list[i] = rrpc_ppa_to_gaddr(dev, gp->addr);
+			rqd->ppa_list[i] = rrpc_ppa_to_gaddr(dev, gp);
 		} else {
 			BUG_ON(is_gc);
 			rrpc_unlock_laddr(rrpc, r);
@@ -852,7 +855,7 @@ static int rrpc_read_rq(struct rrpc *rrpc, struct bio *bio, struct nvm_rq *rqd,
 	gp = &rrpc->trans_map[laddr];
 
 	if (gp->rblk) {
-		rqd->ppa_addr = rrpc_ppa_to_gaddr(rrpc->dev, gp->addr);
+		rqd->ppa_addr = rrpc_ppa_to_gaddr(rrpc->dev, gp);
 	} else {
 		BUG_ON(is_gc);
 		rrpc_unlock_rq(rrpc, rqd);
@@ -869,7 +872,7 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct rrpc_inflight_rq *r = rrpc_get_inflight_rq(rqd);
-	struct rrpc_addr *p;
+	struct ppa_addr p;
 	sector_t laddr = rrpc_get_laddr(bio);
 	int is_gc = flags & NVM_IOTYPE_GC;
 	int i;
@@ -882,7 +885,7 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 	for (i = 0; i < npages; i++) {
 		/* We assume that mapping occurs at 4KB granularity */
 		p = rrpc_map_page(rrpc, laddr + i, is_gc);
-		if (!p) {
+		if (p.ppa == ADDR_EMPTY) {
 			BUG_ON(is_gc);
 			rrpc_unlock_laddr(rrpc, r);
 			nvm_dev_dma_free(dev->parent, rqd->ppa_list,
@@ -891,7 +894,7 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 			return NVM_IO_REQUEUE;
 		}
 
-		rqd->ppa_list[i] = rrpc_ppa_to_gaddr(dev, p->addr);
+		rqd->ppa_list[i] = p;
 	}
 
 	rqd->opcode = NVM_OP_HBWRITE;
@@ -902,7 +905,7 @@ static int rrpc_write_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
 static int rrpc_write_rq(struct rrpc *rrpc, struct bio *bio,
 				struct nvm_rq *rqd, unsigned long flags)
 {
-	struct rrpc_addr *p;
+	struct ppa_addr p;
 	int is_gc = flags & NVM_IOTYPE_GC;
 	sector_t laddr = rrpc_get_laddr(bio);
 
@@ -910,14 +913,14 @@ static int rrpc_write_rq(struct rrpc *rrpc, struct bio *bio,
 		return NVM_IO_REQUEUE;
 
 	p = rrpc_map_page(rrpc, laddr, is_gc);
-	if (!p) {
+	if (p.ppa == ADDR_EMPTY) {
 		BUG_ON(is_gc);
 		rrpc_unlock_rq(rrpc, rqd);
 		rrpc_gc_kick(rrpc);
 		return NVM_IO_REQUEUE;
 	}
 
-	rqd->ppa_addr = rrpc_ppa_to_gaddr(rrpc->dev, p->addr);
+	rqd->ppa_addr = p;
 	rqd->opcode = NVM_OP_HBWRITE;
 
 	return NVM_IO_OK;
@@ -973,7 +976,7 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 	rqd->nr_ppas = nr_pages;
 	rrq->flags = flags;
 
-	err = nvm_submit_io(dev->parent, rqd);
+	err = nvm_submit_io(dev, rqd);
 	if (err) {
 		pr_err("rrpc: I/O submission failed: %d\n", err);
 		bio_put(bio);
@@ -1113,14 +1116,12 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 		div_u64_rem(pba, rrpc->nr_sects, &mod);
 
-		addr[i].addr = pba;
-		raddr[mod].addr = slba + i;
-
-		gaddr = rrpc_ppa_to_gaddr(dev, pba);
+		gaddr = rrpc_recov_addr(dev->parent, pba);
 		rlun = rrpc_ppa_to_lun(rrpc, gaddr);
 		if (!rlun) {
-			pr_err("rrpc: unmapped lun %d l2p corruption\n",
-							rlun->parent->id);
+			pr_err("rrpc: unmapped 'ch:%d,lun:%d' l2p corruption\n",
+							rlun->bppa.g.ch,
+							rlun->bppa.g.lun);
 			return -EINVAL;
 		}
 
@@ -1134,6 +1135,10 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 			rblk->state = NVM_BLK_ST_TGT;
 			rlun->nr_free_blocks--;
 		}
+
+		addr[i].addr = pba;
+		addr[i].rblk = rblk;
+		raddr[mod].addr = slba + i;
 	}
 
 	return 0;
@@ -1230,7 +1235,6 @@ static void rrpc_core_free(struct rrpc *rrpc)
 
 static void rrpc_luns_free(struct rrpc *rrpc)
 {
-	struct nvm_lun *lun;
 	struct rrpc_lun *rlun;
 	int i;
 
@@ -1239,9 +1243,6 @@ static void rrpc_luns_free(struct rrpc *rrpc)
 
 	for (i = 0; i < rrpc->nr_luns; i++) {
 		rlun = &rrpc->luns[i];
-		lun = rlun->parent;
-		if (!lun)
-			break;
 		vfree(rlun->blocks);
 	}
 
@@ -1264,8 +1265,8 @@ static int rrpc_bb_discovery(struct nvm_tgt_dev *dev, struct rrpc_lun *rlun)
 		return -ENOMEM;
 
 	ppa.ppa = 0;
-	ppa.g.ch = rlun->parent->chnl_id;
-	ppa.g.lun = rlun->parent->lun_id;
+	ppa.g.ch = rlun->bppa.g.ch;
+	ppa.g.lun = rlun->bppa.g.lun;
 
 	ret = nvm_get_bb_tbl(dev->parent, ppa, blks);
 	if (ret) {
@@ -1294,11 +1295,17 @@ static int rrpc_bb_discovery(struct nvm_tgt_dev *dev, struct rrpc_lun *rlun)
 	return ret;
 }
 
-static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
+static void rrpc_set_lun_ppa(struct rrpc_lun *rlun, struct ppa_addr ppa)
+{
+	rlun->bppa.ppa = 0;
+	rlun->bppa.g.ch = ppa.g.ch;
+	rlun->bppa.g.lun = ppa.g.lun;
+}
+
+static int rrpc_luns_init(struct rrpc *rrpc, struct ppa_addr *luns)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_geo *geo = &dev->geo;
-	struct nvm_lun *lun;
 	struct rrpc_lun *rlun;
 	int i, j, ret = -EINVAL;
 
@@ -1314,12 +1321,11 @@ static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
 	if (!rrpc->luns)
 		return -ENOMEM;
 
-	i = 0;
-
 	/* 1:1 mapping */
-	list_for_each_entry(lun, lun_list, list) {
-		rlun = &rrpc->luns[i++];
-		rlun->parent = lun;
+	for (i = 0; i < rrpc->nr_luns; i++) {
+		rlun = &rrpc->luns[i];
+		rlun->id = i;
+		rrpc_set_lun_ppa(rlun, luns[i]);
 		rlun->blocks = vzalloc(sizeof(struct rrpc_block) *
 							geo->blks_per_lun);
 		if (!rlun->blocks) {
@@ -1357,8 +1363,6 @@ static int rrpc_luns_init(struct rrpc *rrpc, struct list_head *lun_list)
 		spin_lock_init(&rlun->lock);
 	}
 
-	WARN_ON(i != rrpc->nr_luns);
-
 	return 0;
 err:
 	return ret;
@@ -1512,14 +1516,12 @@ static int rrpc_luns_configure(struct rrpc *rrpc)
 
 static struct nvm_tgt_type tt_rrpc;
 
-static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
-						struct list_head *lun_list)
+static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk)
 {
 	struct request_queue *bqueue = dev->q;
 	struct request_queue *tqueue = tdisk->queue;
 	struct nvm_geo *geo = &dev->geo;
 	struct rrpc *rrpc;
-	int lun_begin = (list_first_entry(lun_list, struct nvm_lun, list))->id;
 	sector_t soffset;
 	int ret;
 
@@ -1554,14 +1556,12 @@ static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
 	}
 	rrpc->soffset = soffset;
 
-	ret = rrpc_luns_init(rrpc, lun_list);
+	ret = rrpc_luns_init(rrpc, dev->luns);
 	if (ret) {
 		pr_err("nvm: rrpc: could not initialize luns\n");
 		goto err;
 	}
 
-	rrpc->poffset = geo->sec_per_lun * lun_begin;
-
 	ret = rrpc_core_init(rrpc);
 	if (ret) {
 		pr_err("nvm: rrpc: could not initialize core\n");
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index c55cec9..bc8adba 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -74,7 +74,9 @@ struct rrpc_block {
 
 struct rrpc_lun {
 	struct rrpc *rrpc;
-	struct nvm_lun *parent;
+
+	int id;
+	struct ppa_addr bppa;
 
 	struct rrpc_block *cur, *gc_cur;
 	struct rrpc_block *blocks;	/* Reference to block allocation */
@@ -107,7 +109,6 @@ struct rrpc {
 	struct gendisk *disk;
 
 	sector_t soffset; /* logical sector offset */
-	u64 poffset; /* physical page offset */
 
 	int nr_luns;
 	struct rrpc_lun *luns;
@@ -164,14 +165,37 @@ struct rrpc_rev_addr {
 	u64 addr;
 };
 
+static inline struct ppa_addr rrpc_linear_to_generic_addr(struct nvm_geo *geo,
+							  struct ppa_addr r)
+{
+	struct ppa_addr l;
+	int secs, pgs;
+	sector_t ppa = r.ppa;
+
+	l.ppa = 0;
+
+	div_u64_rem(ppa, geo->sec_per_pg, &secs);
+	l.g.sec = secs;
+
+	sector_div(ppa, geo->sec_per_pg);
+	div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
+	l.g.pg = pgs;
+
+	return l;
+}
+
+static inline struct ppa_addr rrpc_recov_addr(struct nvm_dev *dev, u64 pba)
+{
+	return linear_to_generic_addr(&dev->geo, pba);
+}
+
 static inline u64 rrpc_blk_to_ppa(struct rrpc *rrpc, struct rrpc_block *rblk)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	struct nvm_geo *geo = &dev->geo;
 	struct rrpc_lun *rlun = rblk->rlun;
-	struct nvm_lun *lun = rlun->parent;
 
-	return (lun->id * geo->sec_per_lun) + (rblk->id * geo->sec_per_blk);
+	return (rlun->id * geo->sec_per_lun) + (rblk->id * geo->sec_per_blk);
 }
 
 static inline sector_t rrpc_get_laddr(struct bio *bio)
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 1cdc812..588d4a3 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -371,6 +371,9 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
 			return -EINVAL;
 		}
 
+		/* Transform physical address to target address space */
+		nvmdev->mt->part_to_tgt(nvmdev, entries, cmd_nlb);
+
 		if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
 			ret = -EINTR;
 			goto out;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index cc210cc..2222853 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -47,6 +47,7 @@ struct ppa_addr {
 struct nvm_rq;
 struct nvm_id;
 struct nvm_dev;
+struct nvm_tgt_dev;
 
 typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
 typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
@@ -210,7 +211,6 @@ struct nvm_id {
 
 struct nvm_target {
 	struct list_head list;
-	struct list_head lun_list;
 	struct nvm_tgt_dev *dev;
 	struct nvm_tgt_type *type;
 	struct gendisk *disk;
@@ -231,7 +231,7 @@ typedef void (nvm_end_io_fn)(struct nvm_rq *);
 
 struct nvm_rq {
 	struct nvm_tgt_instance *ins;
-	struct nvm_dev *dev;
+	struct nvm_tgt_dev *dev;
 
 	struct bio *bio;
 
@@ -266,15 +266,6 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
 	return rqdata + 1;
 }
 
-struct nvm_lun {
-	int id;
-
-	int lun_id;
-	int chnl_id;
-
-	struct list_head list;
-};
-
 enum {
 	NVM_BLK_ST_FREE =	0x1,	/* Free block */
 	NVM_BLK_ST_TGT =	0x2,	/* Block in use by target */
@@ -321,6 +312,9 @@ struct nvm_tgt_dev {
 	/* Device information */
 	struct nvm_geo geo;
 
+	/* Base ppas for target LUNs */
+	struct ppa_addr *luns;
+
 	sector_t total_secs;
 
 	struct nvm_id identity;
@@ -330,6 +324,7 @@ struct nvm_tgt_dev {
 	struct nvm_dev_ops *ops;
 
 	void *parent;
+	void *map;
 };
 
 struct nvm_dev {
@@ -363,16 +358,18 @@ struct nvm_dev {
 	char name[DISK_NAME_LEN];
 	void *private_data;
 
+	void *rmap;
+
 	struct mutex mlock;
 	spinlock_t lock;
 };
 
 static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
-							struct ppa_addr r)
+						     u64 pba)
 {
 	struct ppa_addr l;
 	int secs, pgs, blks, luns;
-	sector_t ppa = r.ppa;
+	sector_t ppa = pba;
 
 	l.ppa = 0;
 
@@ -465,8 +462,7 @@ static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
 
 typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
 typedef sector_t (nvm_tgt_capacity_fn)(void *);
-typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
-				struct list_head *lun_list);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *);
 typedef void (nvm_tgt_exit_fn)(void *);
 
 struct nvm_tgt_type {
@@ -499,10 +495,11 @@ typedef void (nvmm_unregister_fn)(struct nvm_dev *);
 
 typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
 typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
-typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
-typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct ppa_addr *, int);
+typedef int (nvmm_submit_io_fn)(struct nvm_tgt_dev *, struct nvm_rq *);
+typedef int (nvmm_erase_blk_fn)(struct nvm_tgt_dev *, struct ppa_addr *, int);
 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
 typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
+typedef void (nvmm_part_to_tgt_fn)(struct nvm_dev *, sector_t*, int);
 
 struct nvmm_type {
 	const char *name;
@@ -520,6 +517,8 @@ struct nvmm_type {
 	nvmm_get_area_fn *get_area;
 	nvmm_put_area_fn *put_area;
 
+	nvmm_part_to_tgt_fn *part_to_tgt;
+
 	struct list_head list;
 };
 
@@ -533,14 +532,18 @@ extern void nvm_unregister(struct nvm_dev *);
 extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas,
 							int nr_ppas, int type);
 
-extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
+extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
 extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
 extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
 					const struct ppa_addr *, int, int);
 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
-extern int nvm_erase_blk(struct nvm_dev *, struct ppa_addr *, int);
+extern int nvm_erase_blk(struct nvm_tgt_dev *, struct ppa_addr *, int);
+extern int nvm_get_l2p_tbl(struct nvm_dev *, u64, u32, nvm_l2p_update_fn *,
+			   void *);
+extern int nvm_get_area(struct nvm_dev *, sector_t *, sector_t);
+extern void nvm_put_area(struct nvm_dev *, sector_t);
 extern void nvm_end_io(struct nvm_rq *, int);
 extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
 								void *, int);
-- 
2.7.4

[PATCH 18/20] lightnvm: introduce helpers for generic ops in rrpc

[Javier González]

Avoid calling media manager and device-specific operations directly from
rrpc. Create helper functions on lightnvm's core instead.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c   | 22 ++++++++++++++++++++++
 drivers/lightnvm/gennvm.c |  2 --
 drivers/lightnvm/rrpc.c   | 11 +++--------
 include/linux/lightnvm.h  |  3 ---
 4 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 23d582f..69f261e 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -219,6 +219,28 @@ int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags)
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
+int nvm_get_l2p_tbl(struct nvm_dev *dev, u64 slba, u32 nlb,
+		    nvm_l2p_update_fn *update_l2p, void *priv)
+{
+	if (!dev->ops->get_l2p_tbl)
+		return 0;
+
+	return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv);
+}
+EXPORT_SYMBOL(nvm_get_l2p_tbl);
+
+int nvm_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len)
+{
+	return dev->mt->get_area(dev, lba, len);
+}
+EXPORT_SYMBOL(nvm_get_area);
+
+void nvm_put_area(struct nvm_dev *dev, sector_t lba)
+{
+	dev->mt->put_area(dev, lba);
+}
+EXPORT_SYMBOL(nvm_put_area);
+
 void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 {
 	int i;
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 5d7c8c4..befa828 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -175,8 +175,6 @@ static struct nvm_tgt_dev *gen_create_tgt_dev(struct nvm_dev *dev,
 	tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1;
 	tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
 	tgt_dev->q = dev->q;
-	tgt_dev->ops = dev->ops;
-	tgt_dev->mt = dev->mt;
 	tgt_dev->map = dev_map;
 	tgt_dev->luns = luns;
 	memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 08a633c..150b5f30 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -1167,11 +1167,8 @@ static int rrpc_map_init(struct rrpc *rrpc)
 		r->addr = ADDR_EMPTY;
 	}
 
-	if (!dev->ops->get_l2p_tbl)
-		return 0;
-
 	/* Bring up the mapping table from device */
-	ret = dev->ops->get_l2p_tbl(dev->parent, rrpc->soffset, rrpc->nr_sects,
+	ret = nvm_get_l2p_tbl(dev->parent, rrpc->soffset, rrpc->nr_sects,
 					rrpc_l2p_update, rrpc);
 	if (ret) {
 		pr_err("nvm: rrpc: could not read L2P table.\n");
@@ -1372,13 +1369,12 @@ static int rrpc_luns_init(struct rrpc *rrpc, struct ppa_addr *luns)
 static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvmm_type *mt = dev->mt;
 	sector_t size = rrpc->nr_sects * dev->geo.sec_size;
 	int ret;
 
 	size >>= 9;
 
-	ret = mt->get_area(dev->parent, begin, size);
+	ret = nvm_get_area(dev->parent, begin, size);
 	if (!ret)
 		*begin >>= (ilog2(dev->geo.sec_size) - 9);
 
@@ -1388,10 +1384,9 @@ static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
 static void rrpc_area_free(struct rrpc *rrpc)
 {
 	struct nvm_tgt_dev *dev = rrpc->dev;
-	struct nvmm_type *mt = dev->mt;
 	sector_t begin = rrpc->soffset << (ilog2(dev->geo.sec_size) - 9);
 
-	mt->put_area(dev->parent, begin);
+	nvm_put_area(dev->parent, begin);
 }
 
 static void rrpc_free(struct rrpc *rrpc)
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 2222853..b3ca603 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -320,9 +320,6 @@ struct nvm_tgt_dev {
 	struct nvm_id identity;
 	struct request_queue *q;
 
-	struct nvmm_type *mt;
-	struct nvm_dev_ops *ops;
-
 	void *parent;
 	void *map;
 };
-- 
2.7.4

[PATCH 19/20] lightnvm: introduce max_phys_sects helper function

[Javier González]

Target devices do not have access to the device driver operations.
Introduce a helper function that exposes the max. number of physical
sectors supported by the underlying device.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c  | 8 ++++++++
 include/linux/lightnvm.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 69f261e..3d8eaac 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -203,6 +203,14 @@ int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
 }
 EXPORT_SYMBOL(nvm_set_bb_tbl);
 
+int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev)
+{
+	struct nvm_dev *dev = tgt_dev->parent;
+
+	return dev->ops->max_phys_sect;
+}
+EXPORT_SYMBOL(nvm_max_phys_sects);
+
 int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
 	struct nvm_dev *dev = tgt_dev->parent;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index b3ca603..44780ef 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -529,6 +529,7 @@ extern void nvm_unregister(struct nvm_dev *);
 extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas,
 							int nr_ppas, int type);
 
+extern int nvm_max_phys_sects(struct nvm_tgt_dev *);
 extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
 extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
 extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
-- 
2.7.4

[PATCH 20/20] lightnvm: use target nvm on target-specific ops.

[Javier González]

On target-specific operations pass on nvm_tgt_dev instead of the generic
nvm device.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c  | 15 ++++++++++-----
 drivers/lightnvm/rrpc.c  | 14 +++++++-------
 drivers/lightnvm/rrpc.h  |  2 +-
 include/linux/lightnvm.h |  6 +++---
 4 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 3d8eaac..07bf989 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -86,8 +86,7 @@ void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
 }
 EXPORT_SYMBOL(nvm_dev_dma_alloc);
 
-void nvm_dev_dma_free(struct nvm_dev *dev, void *addr,
-							dma_addr_t dma_handler)
+void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
 {
 	dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
 }
@@ -227,9 +226,11 @@ int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags)
 }
 EXPORT_SYMBOL(nvm_erase_blk);
 
-int nvm_get_l2p_tbl(struct nvm_dev *dev, u64 slba, u32 nlb,
+int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb,
 		    nvm_l2p_update_fn *update_l2p, void *priv)
 {
+	struct nvm_dev *dev = tgt_dev->parent;
+
 	if (!dev->ops->get_l2p_tbl)
 		return 0;
 
@@ -237,14 +238,18 @@ int nvm_get_l2p_tbl(struct nvm_dev *dev, u64 slba, u32 nlb,
 }
 EXPORT_SYMBOL(nvm_get_l2p_tbl);
 
-int nvm_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len)
+int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len)
 {
+	struct nvm_dev *dev = tgt_dev->parent;
+
 	return dev->mt->get_area(dev, lba, len);
 }
 EXPORT_SYMBOL(nvm_get_area);
 
-void nvm_put_area(struct nvm_dev *dev, sector_t lba)
+void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba)
 {
+	struct nvm_dev *dev = tgt_dev->parent;
+
 	dev->mt->put_area(dev, lba);
 }
 EXPORT_SYMBOL(nvm_put_area);
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 150b5f30..a9fe89d 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -983,8 +983,8 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
 		if (!(flags & NVM_IOTYPE_GC)) {
 			rrpc_unlock_rq(rrpc, rqd);
 			if (rqd->nr_ppas > 1)
-				nvm_dev_dma_free(dev->parent,
-					rqd->ppa_list, rqd->dma_ppa_list);
+				nvm_dev_dma_free(dev->parent, rqd->ppa_list,
+							rqd->dma_ppa_list);
 		}
 		return NVM_IO_ERR;
 	}
@@ -1116,7 +1116,7 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
 
 		div_u64_rem(pba, rrpc->nr_sects, &mod);
 
-		gaddr = rrpc_recov_addr(dev->parent, pba);
+		gaddr = rrpc_recov_addr(dev, pba);
 		rlun = rrpc_ppa_to_lun(rrpc, gaddr);
 		if (!rlun) {
 			pr_err("rrpc: unmapped 'ch:%d,lun:%d' l2p corruption\n",
@@ -1168,8 +1168,8 @@ static int rrpc_map_init(struct rrpc *rrpc)
 	}
 
 	/* Bring up the mapping table from device */
-	ret = nvm_get_l2p_tbl(dev->parent, rrpc->soffset, rrpc->nr_sects,
-					rrpc_l2p_update, rrpc);
+	ret = nvm_get_l2p_tbl(dev, rrpc->soffset, rrpc->nr_sects,
+							rrpc_l2p_update, rrpc);
 	if (ret) {
 		pr_err("nvm: rrpc: could not read L2P table.\n");
 		return -EINVAL;
@@ -1374,7 +1374,7 @@ static int rrpc_area_init(struct rrpc *rrpc, sector_t *begin)
 
 	size >>= 9;
 
-	ret = nvm_get_area(dev->parent, begin, size);
+	ret = nvm_get_area(dev, begin, size);
 	if (!ret)
 		*begin >>= (ilog2(dev->geo.sec_size) - 9);
 
@@ -1386,7 +1386,7 @@ static void rrpc_area_free(struct rrpc *rrpc)
 	struct nvm_tgt_dev *dev = rrpc->dev;
 	sector_t begin = rrpc->soffset << (ilog2(dev->geo.sec_size) - 9);
 
-	nvm_put_area(dev->parent, begin);
+	nvm_put_area(dev, begin);
 }
 
 static void rrpc_free(struct rrpc *rrpc)
diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index bc8adba..94e4d73 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -184,7 +184,7 @@ static inline struct ppa_addr rrpc_linear_to_generic_addr(struct nvm_geo *geo,
 	return l;
 }
 
-static inline struct ppa_addr rrpc_recov_addr(struct nvm_dev *dev, u64 pba)
+static inline struct ppa_addr rrpc_recov_addr(struct nvm_tgt_dev *dev, u64 pba)
 {
 	return linear_to_generic_addr(&dev->geo, pba);
 }
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 44780ef..5a8217f 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -538,10 +538,10 @@ extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
 extern int nvm_erase_blk(struct nvm_tgt_dev *, struct ppa_addr *, int);
-extern int nvm_get_l2p_tbl(struct nvm_dev *, u64, u32, nvm_l2p_update_fn *,
+extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
 			   void *);
-extern int nvm_get_area(struct nvm_dev *, sector_t *, sector_t);
-extern void nvm_put_area(struct nvm_dev *, sector_t);
+extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t);
+extern void nvm_put_area(struct nvm_tgt_dev *, sector_t);
 extern void nvm_end_io(struct nvm_rq *, int);
 extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
 								void *, int);
-- 
2.7.4

Re: [PATCH 13/20] lightnvm: move block provisioning to targets

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 7654 bytes --]

Hi Javier,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9-rc5]
[cannot apply to next-20161117]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Javier-Gonz-lez/lightnvm-simplify-media-manager/20161119-005946
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/kernel.h:11:0,
                    from include/linux/list.h:8,
                    from include/linux/pci.h:25,
                    from drivers/nvme/host/nvme.h:18,
                    from drivers/nvme/host/lightnvm.c:23:
   drivers/nvme/host/lightnvm.c: In function 'nvme_nvm_register':
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:87:23: note: in definition of macro 'ilog2'
     __builtin_constant_p(n) ? (  \
                          ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:88:4: note: in definition of macro 'ilog2'
      (n) < 1 ? ____ilog2_NaN() : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:89:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 63) ? 63 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:90:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 62) ? 62 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:91:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 61) ? 61 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:92:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 60) ? 60 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:93:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 59) ? 59 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:94:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 58) ? 58 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:95:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 57) ? 57 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:96:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 56) ? 56 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:97:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 55) ? 55 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:98:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 54) ? 54 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:99:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 53) ? 53 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:100:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 52) ? 52 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:101:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 51) ? 51 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:102:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 50) ? 50 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:103:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 49) ? 49 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:104:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 48) ? 48 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:105:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 47) ? 47 : \
       ^
>> drivers/nvme/host/lightnvm.c:623:27: error: 'struct nvm_dev' has no member named 'sec_size'
     ns->lba_shift = ilog2(dev->sec_size);
                              ^
   include/linux/log2.h:106:4: note: in definition of macro 'ilog2'
      (n) & (1ULL << 46) ? 46 : \
       ^

vim +623 drivers/nvme/host/lightnvm.c

40267efd Simon A. F. Lund 2016-09-16  617  	dev->parent_dev = ns->ctrl->device;
40267efd Simon A. F. Lund 2016-09-16  618  	dev->private_data = ns;
b0b4e09c Matias Bjørling  2016-09-16  619  	ns->ndev = dev;
b0b4e09c Matias Bjørling  2016-09-16  620  
b0b4e09c Matias Bjørling  2016-09-16  621  	ret = nvm_register(dev);
b0b4e09c Matias Bjørling  2016-09-16  622  
409ae5a7 Matias Bjørling  2016-11-10 @623  	ns->lba_shift = ilog2(dev->sec_size);
b0b4e09c Matias Bjørling  2016-09-16  624  
40267efd Simon A. F. Lund 2016-09-16  625  	if (sysfs_create_group(&dev->dev.kobj, attrs))
40267efd Simon A. F. Lund 2016-09-16  626  		pr_warn("%s: failed to create sysfs group for identification\n",

:::::: The code at line 623 was first introduced by commit
:::::: 409ae5a76e0505c8ffe1424f9c00dbf2ec7b5eea lightnvm: invalid offset calculation for lba_shift

:::::: TO: Matias Bjørling <m@bjorling.me>
:::::: CC: Jens Axboe <axboe@fb.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 56833 bytes --]

Re: [PATCH 16/20] lightnvm: eliminate nvm_block abstraction on mm

[kbuild test robot]

Hi Javier,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.9-rc5]
[cannot apply to next-20161117]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Javier-Gonz-lez/lightnvm-simplify-media-manager/20161119-005946


coccinelle warnings: (new ones prefixed by >>)

>> drivers/lightnvm/rrpc.c:1123:13-19: ERROR: rlun is NULL but dereferenced.
--
>> drivers/lightnvm/rrpc.c:1293:7-11: ERROR: reference preceded by free on line 1273

vim +1123 drivers/lightnvm/rrpc.c

  1117			raddr[mod].addr = slba + i;
  1118	
  1119			gaddr = rrpc_ppa_to_gaddr(dev, pba);
  1120			rlun = rrpc_ppa_to_lun(rrpc, gaddr);
  1121			if (!rlun) {
  1122				pr_err("rrpc: unmapped lun %d l2p corruption\n",
> 1123								rlun->parent->id);
  1124				return -EINVAL;
  1125			}
  1126	
  1127			rblk = &rlun->blocks[gaddr.g.blk];
  1128			if (!rblk->state) {
  1129				/* at this point, we don't know anything about the
  1130				 * block. It's up to the FTL on top to re-etablish the
  1131				 * block state. The block is assumed to be open.
  1132				 */
  1133				list_move_tail(&rblk->list, &rlun->used_list);
  1134				rblk->state = NVM_BLK_ST_TGT;
  1135				rlun->nr_free_blocks--;
  1136			}
  1137		}
  1138	
  1139		return 0;
  1140	}
  1141	
  1142	static int rrpc_map_init(struct rrpc *rrpc)
  1143	{
  1144		struct nvm_tgt_dev *dev = rrpc->dev;
  1145		sector_t i;
  1146		int ret;
  1147	
  1148		rrpc->trans_map = vzalloc(sizeof(struct rrpc_addr) * rrpc->nr_sects);
  1149		if (!rrpc->trans_map)
  1150			return -ENOMEM;
  1151	
  1152		rrpc->rev_trans_map = vmalloc(sizeof(struct rrpc_rev_addr)
  1153								* rrpc->nr_sects);
  1154		if (!rrpc->rev_trans_map)
  1155			return -ENOMEM;
  1156	
  1157		for (i = 0; i < rrpc->nr_sects; i++) {
  1158			struct rrpc_addr *p = &rrpc->trans_map[i];
  1159			struct rrpc_rev_addr *r = &rrpc->rev_trans_map[i];
  1160	
  1161			p->addr = ADDR_EMPTY;
  1162			r->addr = ADDR_EMPTY;
  1163		}
  1164	
  1165		if (!dev->ops->get_l2p_tbl)
  1166			return 0;
  1167	
  1168		/* Bring up the mapping table from device */
  1169		ret = dev->ops->get_l2p_tbl(dev->parent, rrpc->soffset, rrpc->nr_sects,
  1170						rrpc_l2p_update, rrpc);
  1171		if (ret) {
  1172			pr_err("nvm: rrpc: could not read L2P table.\n");
  1173			return -EINVAL;
  1174		}
  1175	
  1176		return 0;
  1177	}
  1178	
  1179	/* Minimum pages needed within a lun */
  1180	#define PAGE_POOL_SIZE 16
  1181	#define ADDR_POOL_SIZE 64
  1182	
  1183	static int rrpc_core_init(struct rrpc *rrpc)
  1184	{
  1185		down_write(&rrpc_lock);
  1186		if (!rrpc_gcb_cache) {
  1187			rrpc_gcb_cache = kmem_cache_create("rrpc_gcb",
  1188					sizeof(struct rrpc_block_gc), 0, 0, NULL);
  1189			if (!rrpc_gcb_cache) {
  1190				up_write(&rrpc_lock);
  1191				return -ENOMEM;
  1192			}
  1193	
  1194			rrpc_rq_cache = kmem_cache_create("rrpc_rq",
  1195					sizeof(struct nvm_rq) + sizeof(struct rrpc_rq),
  1196					0, 0, NULL);
  1197			if (!rrpc_rq_cache) {
  1198				kmem_cache_destroy(rrpc_gcb_cache);
  1199				up_write(&rrpc_lock);
  1200				return -ENOMEM;
  1201			}
  1202		}
  1203		up_write(&rrpc_lock);
  1204	
  1205		rrpc->page_pool = mempool_create_page_pool(PAGE_POOL_SIZE, 0);
  1206		if (!rrpc->page_pool)
  1207			return -ENOMEM;
  1208	
  1209		rrpc->gcb_pool = mempool_create_slab_pool(rrpc->dev->geo.nr_luns,
  1210									rrpc_gcb_cache);
  1211		if (!rrpc->gcb_pool)
  1212			return -ENOMEM;
  1213	
  1214		rrpc->rq_pool = mempool_create_slab_pool(64, rrpc_rq_cache);
  1215		if (!rrpc->rq_pool)
  1216			return -ENOMEM;
  1217	
  1218		spin_lock_init(&rrpc->inflights.lock);
  1219		INIT_LIST_HEAD(&rrpc->inflights.reqs);
  1220	
  1221		return 0;
  1222	}
  1223	
  1224	static void rrpc_core_free(struct rrpc *rrpc)
  1225	{
  1226		mempool_destroy(rrpc->page_pool);
  1227		mempool_destroy(rrpc->gcb_pool);
  1228		mempool_destroy(rrpc->rq_pool);
  1229	}
  1230	
  1231	static void rrpc_luns_free(struct rrpc *rrpc)
  1232	{
  1233		struct nvm_lun *lun;
  1234		struct rrpc_lun *rlun;
  1235		int i;
  1236	
  1237		if (!rrpc->luns)
  1238			return;
  1239	
  1240		for (i = 0; i < rrpc->nr_luns; i++) {
  1241			rlun = &rrpc->luns[i];
  1242			lun = rlun->parent;
  1243			if (!lun)
  1244				break;
  1245			vfree(rlun->blocks);
  1246		}
  1247	
  1248		kfree(rrpc->luns);
  1249	}
  1250	
  1251	static int rrpc_bb_discovery(struct nvm_tgt_dev *dev, struct rrpc_lun *rlun)
  1252	{
  1253		struct nvm_geo *geo = &dev->geo;
  1254		struct rrpc_block *rblk;
  1255		struct ppa_addr ppa;
  1256		u8 *blks;
  1257		int nr_blks;
  1258		int i;
  1259		int ret;
  1260	
  1261		nr_blks = geo->blks_per_lun * geo->plane_mode;
  1262		blks = kmalloc(nr_blks, GFP_KERNEL);
  1263		if (!blks)
  1264			return -ENOMEM;
  1265	
  1266		ppa.ppa = 0;
  1267		ppa.g.ch = rlun->parent->chnl_id;
  1268		ppa.g.lun = rlun->parent->lun_id;
  1269	
  1270		ret = nvm_get_bb_tbl(dev->parent, ppa, blks);
  1271		if (ret) {
  1272			pr_err("rrpc: could not get BB table\n");
> 1273			kfree(blks);
  1274			goto out;
  1275		}
  1276	
  1277		nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks);
  1278		if (nr_blks < 0)
  1279			return nr_blks;
  1280	
  1281		rlun->nr_free_blocks = geo->blks_per_lun;
  1282		for (i = 0; i < nr_blks; i++) {
  1283			if (blks[i] == NVM_BLK_T_FREE)
  1284				continue;
  1285	
  1286			rblk = &rlun->blocks[i];
  1287			list_move_tail(&rblk->list, &rlun->bb_list);
  1288			rblk->state = NVM_BLK_ST_BAD;
  1289			rlun->nr_free_blocks--;
  1290		}
  1291	
  1292	out:
> 1293		kfree(blks);
  1294		return ret;
  1295	}
  1296	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Re: [PATCH 00/20] lightnvm: simplify media manager

[Matias Bjørling]

On 11/18/2016 03:43 PM, Javier González wrote:
> This patchset simplifies the generic media manager interface and moves
> lun and block functionality to lightnvm targets. This makes that
> rrpc-specific functionality is not exposed on the media manager. This is
> done in preparation for the pblk target.
> 
> Matias: patches 0 - 4 have been posted before. Patches apply to you
> for-4.10/core
> 
> Javier González (20):
>   lightnvm: enable to send hint to erase command
>   lightnvm: do not protect block 0
>   lightnvm: export set bad block table
>   lightnvm: add ECC error codes
>   lightnvm: rrpc: split bios of size > 256kb
>   lightnvm: remove sysfs configuration interface
>   lightnvm: cleanup unused target operations
>   lightnvm: make address conversion functions global
>   lightnvm: remove unnecessary variables in rrpc
>   lightnvm: use constant name instead of value
>   lightnvm: remove gen_lun abstraction
>   lightnvm: manage lun partitions internally in mm
>   lightnvm: move block provisioning to targets
>   lightnvm: remove get_lun operation on gennvm
>   lightnvm: remove debug lun statistics from gennvm
>   lightnvm: eliminate nvm_block abstraction on mm
>   lightnvm: eliminate nvm_lun abstraction in mm
>   lightnvm: introduce helpers for generic ops in rrpc
>   lightnvm: introduce max_phys_sects helper function
>   lightnvm: use target nvm on target-specific ops.
> 
>  drivers/lightnvm/core.c      | 306 ++++++++------------
>  drivers/lightnvm/gennvm.c    | 664 ++++++++++++++++++++-----------------------
>  drivers/lightnvm/gennvm.h    |  34 ++-
>  drivers/lightnvm/rrpc.c      | 512 +++++++++++++++++++++------------
>  drivers/lightnvm/rrpc.h      |  65 ++++-
>  drivers/lightnvm/sysblk.c    |  98 +++----
>  drivers/nvme/host/lightnvm.c |  15 +-
>  include/linux/lightnvm.h     | 231 +++++++--------
>  8 files changed, 1005 insertions(+), 920 deletions(-)
> 

Thanks Javier. I have picked 1-12 (including "manage lun partitions
internally in mm"). Will wait on repost of 13-20 to pick the rest.