Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block

Pull block layer updates from Jens Axboe:
 "This is the main block pull request this series. Contrary to previous
  release, I've kept the core and driver changes in the same branch. We
  always ended up having dependencies between the two for obvious
  reasons, so makes more sense to keep them together. That said, I'll
  probably try and keep more topical branches going forward, especially
  for cycles that end up being as busy as this one.

  The major parts of this pull request is:

   - Improved support for O_DIRECT on block devices, with a small
     private implementation instead of using the pig that is
     fs/direct-io.c. From Christoph.

   - Request completion tracking in a scalable fashion. This is utilized
     by two components in this pull, the new hybrid polling and the
     writeback queue throttling code.

   - Improved support for polling with O_DIRECT, adding a hybrid mode
     that combines pure polling with an initial sleep. From me.

   - Support for automatic throttling of writeback queues on the block
     side. This uses feedback from the device completion latencies to
     scale the queue on the block side up or down. From me.

   - Support from SMR drives in the block layer and for SD. From Hannes
     and Shaun.

   - Multi-connection support for nbd. From Josef.

   - Cleanup of request and bio flags, so we have a clear split between
     which are bio (or rq) private, and which ones are shared. From
     Christoph.

   - A set of patches from Bart, that improve how we handle queue
     stopping and starting in blk-mq.

   - Support for WRITE_ZEROES from Chaitanya.

   - Lightnvm updates from Javier/Matias.

   - Supoort for FC for the nvme-over-fabrics code. From James Smart.

   - A bunch of fixes from a whole slew of people, too many to name
     here"

* 'for-4.10/block' of git://git.kernel.dk/linux-block: (182 commits)
  blk-stat: fix a few cases of missing batch flushing
  blk-flush: run the queue when inserting blk-mq flush
  elevator: make the rqhash helpers exported
  blk-mq: abstract out blk_mq_dispatch_rq_list() helper
  blk-mq: add blk_mq_start_stopped_hw_queue()
  block: improve handling of the magic discard payload
  blk-wbt: don't throttle discard or write zeroes
  nbd: use dev_err_ratelimited in io path
  nbd: reset the setup task for NBD_CLEAR_SOCK
  nvme-fabrics: Add FC LLDD loopback driver to test FC-NVME
  nvme-fabrics: Add target support for FC transport
  nvme-fabrics: Add host support for FC transport
  nvme-fabrics: Add FC transport LLDD api definitions
  nvme-fabrics: Add FC transport FC-NVME definitions
  nvme-fabrics: Add FC transport error codes to nvme.h
  Add type 0x28 NVME type code to scsi fc headers
  nvme-fabrics: patch target code in prep for FC transport support
  nvme-fabrics: set sqe.command_id in core not transports
  parser: add u64 number parser
  nvme-rdma: align to generic ib_event logging helper
  ...

1 files changed, 127 insertions, 117 deletions

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index d190786e4ad8..7c273bbc5351 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 *);
@@ -107,6 +108,8 @@ 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,
@@ -208,7 +211,7 @@ struct nvm_id {
 
 struct nvm_target {
 	struct list_head list;
-	struct nvm_dev *dev;
+	struct nvm_tgt_dev *dev;
 	struct nvm_tgt_type *type;
 	struct gendisk *disk;
 };
@@ -228,7 +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;
 
@@ -263,35 +266,12 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
 	return rqdata + 1;
 }
 
-struct nvm_block;
-
-struct nvm_lun {
-	int id;
-
-	int lun_id;
-	int chnl_id;
-
-	spinlock_t lock;
-
-	unsigned int nr_free_blocks;	/* Number of unused blocks */
-	struct nvm_block *blocks;
-};
-
 enum {
 	NVM_BLK_ST_FREE =	0x1,	/* Free block */
 	NVM_BLK_ST_TGT =	0x2,	/* Block in use by target */
 	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;
@@ -301,22 +281,12 @@ 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;
@@ -336,14 +306,44 @@ 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;
+
+	/* Base ppas for target LUNs */
+	struct ppa_addr *luns;
+
+	sector_t total_secs;
+
+	struct nvm_id identity;
+	struct request_queue *q;
+
+	struct nvm_dev *parent;
+	void *map;
+};
+
+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;
@@ -352,26 +352,57 @@ struct nvm_dev {
 
 	/* Backend device */
 	struct request_queue *q;
-	struct device dev;
-	struct device *parent_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,
+						     u64 pba)
+{
+	struct ppa_addr l;
+	int secs, pgs, blks, luns;
+	sector_t ppa = pba;
+
+	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;
+
+	sector_div(ppa, geo->pgs_per_blk);
+	div_u64_rem(ppa, geo->blks_per_lun, &blks);
+	l.g.blk = blks;
+
+	sector_div(ppa, geo->blks_per_lun);
+	div_u64_rem(ppa, geo->luns_per_chnl, &luns);
+	l.g.lun = luns;
+
+	sector_div(ppa, geo->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)
 {
+	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;
 }
@@ -379,24 +410,25 @@ 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;
 }
@@ -411,18 +443,13 @@ 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)
+static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
 {
-	struct ppa_addr ppa;
-	struct nvm_lun *lun = blk->lun;
-
-	ppa.ppa = 0;
-	ppa.g.blk = blk->id % dev->blks_per_lun;
-	ppa.g.lun = lun->lun_id;
-	ppa.g.ch = lun->chnl_id;
+	if (ppa_empty(ppa1) || ppa_empty(ppa2))
+		return 0;
 
-	return ppa;
+	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)
@@ -432,7 +459,7 @@ 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_dev *, struct gendisk *, int, int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *);
 typedef void (nvm_tgt_exit_fn)(void *);
 
 struct nvm_tgt_type {
@@ -465,23 +492,18 @@ 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_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 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_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 struct ppa_addr (nvmm_trans_ppa_fn)(struct nvm_tgt_dev *,
+					    struct ppa_addr, int);
+typedef void (nvmm_part_to_tgt_fn)(struct nvm_dev *, sector_t*, int);
+
+enum {
+	TRANS_TGT_TO_DEV =	0x0,
+	TRANS_DEV_TO_TGT =	0x1,
+};
 
 struct nvmm_type {
 	const char *name;
@@ -493,54 +515,41 @@ 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_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;
 
-	/* Bad block mgmt */
-	nvmm_mark_blk_fn *mark_blk;
-
-	/* 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;
-
 	nvmm_get_area_fn *get_area;
 	nvmm_put_area_fn *put_area;
 
+	nvmm_trans_ppa_fn *trans_ppa;
+	nvmm_part_to_tgt_fn *part_to_tgt;
+
 	struct list_head list;
 };
 
 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 *);
 
-void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
-
-extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
+extern int nvm_set_bb_tbl(struct nvm_dev *, struct ppa_addr *, int, int);
+extern int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr *,
+			      int, int);
+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 *);
 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_tgt_dev *, struct ppa_addr *, int);
+extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
+			   void *);
+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);
@@ -548,6 +557,7 @@ extern int nvm_submit_ppa_list(struct nvm_dev *, struct ppa_addr *, int, int,
 							int, void *, int);
 extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
 extern int nvm_get_bb_tbl(struct nvm_dev *, struct ppa_addr, u8 *);
+extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);
 
 /* sysblk.c */
 #define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */
@@ -569,10 +579,10 @@ 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 */