Merge remote-tracking branch 'airlied/drm-next' into topic/vblank-rework

Dave asked me to do the backmerge before sending him the revised pull
request, so here we go. Nothing fancy in the conflicts, just a few
things changed right next to each another.

Conflicts:
	drivers/gpu/drm/drm_irq.c

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

14 files changed, 112 insertions, 347 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index fd0421c6d40a..95ed9424a11a 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -527,6 +527,7 @@ enum iscsi_err {
 	ISCSI_ERR_XMIT_FAILED		= ISCSI_ERR_BASE + 19,
 	ISCSI_ERR_TCP_CONN_CLOSE	= ISCSI_ERR_BASE + 20,
 	ISCSI_ERR_SCSI_EH_SESSION_RST	= ISCSI_ERR_BASE + 21,
+	ISCSI_ERR_NOP_TIMEDOUT		= ISCSI_ERR_BASE + 22,
 };
 
 /*
diff --git a/include/scsi/libsrp.h b/include/scsi/libsrp.h
deleted file mode 100644
index f4105c91af53..000000000000
--- a/include/scsi/libsrp.h
+++ /dev/null
@@ -1,78 +0,0 @@
-#ifndef __LIBSRP_H__
-#define __LIBSRP_H__
-
-#include <linux/list.h>
-#include <linux/kfifo.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_host.h>
-#include <scsi/srp.h>
-
-enum iue_flags {
-	V_DIOVER,
-	V_WRITE,
-	V_LINKED,
-	V_FLYING,
-};
-
-struct srp_buf {
-	dma_addr_t dma;
-	void *buf;
-};
-
-struct srp_queue {
-	void *pool;
-	void *items;
-	struct kfifo queue;
-	spinlock_t lock;
-};
-
-struct srp_target {
-	struct Scsi_Host *shost;
-	struct device *dev;
-
-	spinlock_t lock;
-	struct list_head cmd_queue;
-
-	size_t srp_iu_size;
-	struct srp_queue iu_queue;
-	size_t rx_ring_size;
-	struct srp_buf **rx_ring;
-
-	void *ldata;
-};
-
-struct iu_entry {
-	struct srp_target *target;
-
-	struct list_head ilist;
-	dma_addr_t remote_token;
-	unsigned long flags;
-
-	struct srp_buf *sbuf;
-};
-
-typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
-			 struct srp_direct_buf *, int,
-			 enum dma_data_direction, unsigned int);
-extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
-extern void srp_target_free(struct srp_target *);
-
-extern struct iu_entry *srp_iu_get(struct srp_target *);
-extern void srp_iu_put(struct iu_entry *);
-
-extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64);
-extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
-			     srp_rdma_t, int, int);
-
-
-static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
-{
-	return (struct srp_target *) host->hostdata;
-}
-
-static inline int srp_cmd_direction(struct srp_cmd *cmd)
-{
-	return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
-}
-
-#endif
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 0a4edfe8af51..261e708010da 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -31,7 +31,7 @@ enum scsi_timeouts {
  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
  * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
  */
-#ifdef ARCH_HAS_SG_CHAIN
+#ifdef CONFIG_ARCH_HAS_SG_CHAIN
 #define SCSI_MAX_SG_CHAIN_SEGMENTS	2048
 #else
 #define SCSI_MAX_SG_CHAIN_SEGMENTS	SCSI_MAX_SG_SEGMENTS
@@ -332,6 +332,7 @@ static inline int scsi_status_is_good(int status)
 #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
 #define TYPE_RBC	    0x0e
 #define TYPE_OSD            0x11
+#define TYPE_ZBC            0x14
 #define TYPE_NO_LUN         0x7f
 
 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
@@ -385,7 +386,7 @@ struct scsi_lun {
 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
 
-static inline int scsi_is_wlun(unsigned int lun)
+static inline int scsi_is_wlun(u64 lun)
 {
 	return (lun & 0xff00) == SCSI_W_LUN_BASE;
 }
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index e0ae71098144..73f349044941 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -150,9 +150,7 @@ static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd)
 }
 
 extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);
-extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t);
 extern void scsi_put_command(struct scsi_cmnd *);
-extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *);
 extern void scsi_finish_command(struct scsi_cmnd *cmd);
 
 extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
@@ -160,7 +158,6 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
 extern void scsi_kunmap_atomic_sg(void *virt);
 
 extern int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask);
-extern void scsi_release_buffers(struct scsi_cmnd *cmd);
 
 extern int scsi_dma_map(struct scsi_cmnd *cmd);
 extern void scsi_dma_unmap(struct scsi_cmnd *cmd);
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 27ab31017f09..1a0d1842962e 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -81,9 +81,9 @@ struct scsi_device {
 	struct list_head    siblings;   /* list of all devices on this host */
 	struct list_head    same_target_siblings; /* just the devices sharing same target id */
 
-	/* this is now protected by the request_queue->queue_lock */
-	unsigned int device_busy;	/* commands actually active on
-					 * low-level. protected by queue_lock. */
+	atomic_t device_busy;		/* commands actually active on LLDD */
+	atomic_t device_blocked;	/* Device returned QUEUE_FULL. */
+
 	spinlock_t list_lock;
 	struct list_head cmd_list;	/* queue of in use SCSI Command structures */
 	struct list_head starved_entry;
@@ -98,8 +98,8 @@ struct scsi_device {
 
 	unsigned long last_queue_ramp_up;	/* last queue ramp up time */
 
-	unsigned int id, lun, channel;
-
+	unsigned int id, channel;
+	u64 lun;
 	unsigned int manufacturer;	/* Manufacturer of device, for using 
 					 * vendor-specific cmd's */
 	unsigned sector_size;	/* size in bytes */
@@ -127,7 +127,6 @@ struct scsi_device {
 				 * pass settings from slave_alloc to scsi
 				 * core. */
 	unsigned int eh_timeout; /* Error handling timeout */
-	unsigned writeable:1;
 	unsigned removable:1;
 	unsigned changed:1;	/* Data invalid due to media change */
 	unsigned busy:1;	/* Used to prevent races */
@@ -155,6 +154,7 @@ struct scsi_device {
 	unsigned skip_ms_page_8:1;	/* do not use MODE SENSE page 0x08 */
 	unsigned skip_ms_page_3f:1;	/* do not use MODE SENSE page 0x3f */
 	unsigned skip_vpd_pages:1;	/* do not read VPD pages */
+	unsigned try_vpd_pages:1;	/* attempt to read VPD pages */
 	unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
 	unsigned no_start_on_add:1;	/* do not issue start on add */
 	unsigned allow_restart:1; /* issue START_UNIT in error handler */
@@ -182,8 +182,6 @@ struct scsi_device {
 	struct list_head event_list;	/* asserted events */
 	struct work_struct event_work;
 
-	unsigned int device_blocked;	/* Device returned QUEUE_FULL. */
-
 	unsigned int max_device_blocked; /* what device_blocked counts down from  */
 #define SCSI_DEFAULT_DEVICE_BLOCKED	3
 
@@ -291,14 +289,15 @@ struct scsi_target {
 	unsigned int		expecting_lun_change:1;	/* A device has reported
 						 * a 3F/0E UA, other devices on
 						 * the same target will also. */
-	/* commands actually active on LLD. protected by host lock. */
-	unsigned int		target_busy;
+	/* commands actually active on LLD. */
+	atomic_t		target_busy;
+	atomic_t		target_blocked;
+
 	/*
 	 * LLDs should set this in the slave_alloc host template callout.
 	 * If set to zero then there is not limit.
 	 */
 	unsigned int		can_queue;
-	unsigned int		target_blocked;
 	unsigned int		max_target_blocked;
 #define SCSI_DEFAULT_TARGET_BLOCKED	3
 
@@ -321,9 +320,9 @@ static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
 	dev_printk(prefix, &(starget)->dev, fmt, ##a)
 
 extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
-		uint, uint, uint, void *hostdata);
+		uint, uint, u64, void *hostdata);
 extern int scsi_add_device(struct Scsi_Host *host, uint channel,
-			   uint target, uint lun);
+			   uint target, u64 lun);
 extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
 extern void scsi_remove_device(struct scsi_device *);
 extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
@@ -332,13 +331,13 @@ void scsi_attach_vpd(struct scsi_device *sdev);
 extern int scsi_device_get(struct scsi_device *);
 extern void scsi_device_put(struct scsi_device *);
 extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
-					      uint, uint, uint);
+					      uint, uint, u64);
 extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
-						uint, uint, uint);
+						uint, uint, u64);
 extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
-							uint);
+							u64);
 extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
-							  uint);
+							  u64);
 extern void starget_for_each_device(struct scsi_target *, void *,
 		     void (*fn)(struct scsi_device *, void *));
 extern void __starget_for_each_device(struct scsi_target *, void *,
@@ -411,13 +410,13 @@ extern void scsi_device_resume(struct scsi_device *sdev);
 extern void scsi_target_quiesce(struct scsi_target *);
 extern void scsi_target_resume(struct scsi_target *);
 extern void scsi_scan_target(struct device *parent, unsigned int channel,
-			     unsigned int id, unsigned int lun, int rescan);
+			     unsigned int id, u64 lun, int rescan);
 extern void scsi_target_reap(struct scsi_target *);
 extern void scsi_target_block(struct device *);
 extern void scsi_target_unblock(struct device *, enum scsi_device_state);
 extern void scsi_remove_target(struct device *);
-extern void int_to_scsilun(unsigned int, struct scsi_lun *);
-extern int scsilun_to_int(struct scsi_lun *);
+extern void int_to_scsilun(u64, struct scsi_lun *);
+extern u64 scsilun_to_int(struct scsi_lun *);
 extern const char *scsi_device_state_name(enum scsi_device_state);
 extern int scsi_is_sdev_device(const struct device *);
 extern int scsi_is_target_device(const struct device *);
diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index 447d2d7466fc..183eaab7c380 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -32,4 +32,9 @@
 #define BLIST_ATTACH_PQ3	0x1000000 /* Scan: Attach to PQ3 devices */
 #define BLIST_NO_DIF		0x2000000 /* Disable T10 PI (DIF) */
 #define BLIST_SKIP_VPD_PAGES	0x4000000 /* Ignore SBC-3 VPD pages */
+#define BLIST_SCSI3LUN		0x8000000 /* Scan more than 256 LUNs
+					     for sequential scan */
+#define BLIST_TRY_VPD_PAGES	0x10000000 /* Attempt to read VPD pages */
+#define BLIST_NO_RSOC		0x20000000 /* don't try to issue RSOC */
+
 #endif
diff --git a/include/scsi/scsi_driver.h b/include/scsi/scsi_driver.h
index 36c4114ed9bc..c2b759809d8a 100644
--- a/include/scsi/scsi_driver.h
+++ b/include/scsi/scsi_driver.h
@@ -29,7 +29,4 @@ extern int scsi_register_interface(struct class_interface *);
 #define scsi_unregister_interface(intf) \
 	class_interface_unregister(intf)
 
-int scsi_setup_blk_pc_cmnd(struct scsi_device *sdev, struct request *req);
-int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req);
-
 #endif /* _SCSI_SCSI_DRIVER_H */
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 94844fc77b97..ba2034779961 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -7,6 +7,7 @@
 #include <linux/workqueue.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
+#include <linux/blk-mq.h>
 #include <scsi/scsi.h>
 
 struct request_queue;
@@ -132,27 +133,6 @@ struct scsi_host_template {
 	int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);
 
 	/*
-	 * The transfer functions are used to queue a scsi command to
-	 * the LLD. When the driver is finished processing the command
-	 * the done callback is invoked.
-	 *
-	 * This is called to inform the LLD to transfer
-	 * scsi_bufflen(cmd) bytes. scsi_sg_count(cmd) speciefies the
-	 * number of scatterlist entried in the command and
-	 * scsi_sglist(cmd) returns the scatterlist.
-	 *
-	 * return values: see queuecommand
-	 *
-	 * If the LLD accepts the cmd, it should set the result to an
-	 * appropriate value when completed before calling the done function.
-	 *
-	 * STATUS: REQUIRED FOR TARGET DRIVERS
-	 */
-	/* TODO: rename */
-	int (* transfer_response)(struct scsi_cmnd *,
-				  void (*done)(struct scsi_cmnd *));
-
-	/*
 	 * This is an error handling strategy routine.  You don't need to
 	 * define one of these if you don't want to - there is a default
 	 * routine that is present that should work in most cases.  For those
@@ -408,7 +388,7 @@ struct scsi_host_template {
 	/*
 	 * Set this if the host adapter has limitations beside segment count.
 	 */
-	unsigned short max_sectors;
+	unsigned int max_sectors;
 
 	/*
 	 * DMA scatter gather segment boundary limit. A segment crossing this
@@ -531,6 +511,9 @@ struct scsi_host_template {
 	 */
 	unsigned int cmd_size;
 	struct scsi_host_cmd_pool *cmd_pool;
+
+	/* temporary flag to disable blk-mq I/O path */
+	bool disable_blk_mq;
 };
 
 /*
@@ -601,15 +584,16 @@ struct Scsi_Host {
 	 * Area to keep a shared tag map (if needed, will be
 	 * NULL if not).
 	 */
-	struct blk_queue_tag	*bqt;
+	union {
+		struct blk_queue_tag	*bqt;
+		struct blk_mq_tag_set	tag_set;
+	};
 
-	/*
-	 * The following two fields are protected with host_lock;
-	 * however, eh routines can safely access during eh processing
-	 * without acquiring the lock.
-	 */
-	unsigned int host_busy;		   /* commands actually active on low-level */
-	unsigned int host_failed;	   /* commands that failed. */
+	atomic_t host_busy;		   /* commands actually active on low-level */
+	atomic_t host_blocked;
+
+	unsigned int host_failed;	   /* commands that failed.
+					      protected by host_lock */
 	unsigned int host_eh_scheduled;    /* EH scheduled without command */
     
 	unsigned int host_no;  /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
@@ -623,11 +607,11 @@ struct Scsi_Host {
 	 * These three parameters can be used to allow for wide scsi,
 	 * and for host adapters that support multiple busses
 	 * The first two should be set to 1 more than the actual max id
-	 * or lun (i.e. 8 for normal systems).
+	 * or lun (e.g. 8 for SCSI parallel systems).
 	 */
-	unsigned int max_id;
-	unsigned int max_lun;
 	unsigned int max_channel;
+	unsigned int max_id;
+	u64 max_lun;
 
 	/*
 	 * This is a unique identifier that must be assigned so that we
@@ -652,7 +636,7 @@ struct Scsi_Host {
 	short cmd_per_lun;
 	short unsigned int sg_tablesize;
 	short unsigned int sg_prot_tablesize;
-	short unsigned int max_sectors;
+	unsigned int max_sectors;
 	unsigned long dma_boundary;
 	/* 
 	 * Used to assign serial numbers to the cmds.
@@ -695,6 +679,8 @@ struct Scsi_Host {
 	/* The controller does not support WRITE SAME */
 	unsigned no_write_same:1;
 
+	unsigned use_blk_mq:1;
+
 	/*
 	 * Optional work queue to be utilized by the transport
 	 */
@@ -707,11 +693,6 @@ struct Scsi_Host {
 	struct workqueue_struct *tmf_work_q;
 
 	/*
-	 * Host has rejected a command because it was busy.
-	 */
-	unsigned int host_blocked;
-
-	/*
 	 * Value host_blocked counts down from
 	 */
 	unsigned int max_host_blocked;
@@ -800,6 +781,13 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
 		shost->tmf_in_progress;
 }
 
+extern bool scsi_use_blk_mq;
+
+static inline bool shost_use_blk_mq(struct Scsi_Host *shost)
+{
+	return shost->use_blk_mq;
+}
+
 extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
 extern void scsi_flush_work(struct Scsi_Host *);
 
@@ -816,8 +804,6 @@ extern struct Scsi_Host *scsi_host_lookup(unsigned short);
 extern const char *scsi_host_state_name(enum scsi_host_state);
 extern void scsi_cmd_get_serial(struct Scsi_Host *, struct scsi_cmnd *);
 
-extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
-
 static inline int __must_check scsi_add_host(struct Scsi_Host *host,
 					     struct device *dev)
 {
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index 81dd12edc38c..cdcc90b07ecb 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -67,7 +67,8 @@ static inline void scsi_activate_tcq(struct scsi_device *sdev, int depth)
 	if (!sdev->tagged_supported)
 		return;
 
-	if (!blk_queue_tagged(sdev->request_queue))
+	if (!shost_use_blk_mq(sdev->host) &&
+	    blk_queue_tagged(sdev->request_queue))
 		blk_queue_init_tags(sdev->request_queue, depth,
 				    sdev->host->bqt);
 
@@ -80,7 +81,8 @@ static inline void scsi_activate_tcq(struct scsi_device *sdev, int depth)
  **/
 static inline void scsi_deactivate_tcq(struct scsi_device *sdev, int depth)
 {
-	if (blk_queue_tagged(sdev->request_queue))
+	if (!shost_use_blk_mq(sdev->host) &&
+	    blk_queue_tagged(sdev->request_queue))
 		blk_queue_free_tags(sdev->request_queue);
 	scsi_adjust_queue_depth(sdev, 0, depth);
 }
@@ -108,6 +110,15 @@ static inline int scsi_populate_tag_msg(struct scsi_cmnd *cmd, char *msg)
 	return 0;
 }
 
+static inline struct scsi_cmnd *scsi_mq_find_tag(struct Scsi_Host *shost,
+		unsigned int hw_ctx, int tag)
+{
+	struct request *req;
+
+	req = blk_mq_tag_to_rq(shost->tag_set.tags[hw_ctx], tag);
+	return req ? (struct scsi_cmnd *)req->special : NULL;
+}
+
 /**
  * scsi_find_tag - find a tagged command by device
  * @SDpnt:	pointer to the ScSI device
@@ -118,10 +129,12 @@ static inline int scsi_populate_tag_msg(struct scsi_cmnd *cmd, char *msg)
  **/
 static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
 {
-
         struct request *req;
 
         if (tag != SCSI_NO_TAG) {
+		if (shost_use_blk_mq(sdev->host))
+			return scsi_mq_find_tag(sdev->host, 0, tag);
+
         	req = blk_queue_find_tag(sdev->request_queue, tag);
 	        return req ? (struct scsi_cmnd *)req->special : NULL;
 	}
@@ -130,6 +143,7 @@ static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
 	return sdev->current_cmnd;
 }
 
+
 /**
  * scsi_init_shared_tag_map - create a shared tag map
  * @shost:	the host to share the tag map among all devices
@@ -138,6 +152,12 @@ static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
 static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
 {
 	/*
+	 * We always have a shared tag map around when using blk-mq.
+	 */
+	if (shost_use_blk_mq(shost))
+		return 0;
+
+	/*
 	 * If the shared tag map isn't already initialized, do it now.
 	 * This saves callers from having to check ->bqt when setting up
 	 * devices on the shared host (for libata)
@@ -165,6 +185,8 @@ static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
 	struct request *req;
 
 	if (tag != SCSI_NO_TAG) {
+		if (shost_use_blk_mq(shost))
+			return scsi_mq_find_tag(shost, 0, tag);
 		req = blk_map_queue_find_tag(shost->bqt, tag);
 		return req ? (struct scsi_cmnd *)req->special : NULL;
 	}
diff --git a/include/scsi/scsi_tgt.h b/include/scsi/scsi_tgt.h
deleted file mode 100644
index d0fefb96158f..000000000000
--- a/include/scsi/scsi_tgt.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * SCSI target definitions
- */
-
-#include <linux/dma-mapping.h>
-
-struct Scsi_Host;
-struct scsi_cmnd;
-struct scsi_lun;
-
-extern struct Scsi_Host *scsi_tgt_cmd_to_host(struct scsi_cmnd *);
-extern int scsi_tgt_alloc_queue(struct Scsi_Host *);
-extern void scsi_tgt_free_queue(struct Scsi_Host *);
-extern int scsi_tgt_queue_command(struct scsi_cmnd *, u64, struct scsi_lun *, u64);
-extern int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *, u64, int, u64,
-				     struct scsi_lun *, void *);
-extern struct scsi_cmnd *scsi_host_get_command(struct Scsi_Host *,
-					       enum dma_data_direction,	gfp_t);
-extern void scsi_host_put_command(struct Scsi_Host *, struct scsi_cmnd *);
-extern int scsi_tgt_it_nexus_create(struct Scsi_Host *, u64, char *);
-extern int scsi_tgt_it_nexus_destroy(struct Scsi_Host *, u64);
diff --git a/include/scsi/scsi_tgt_if.h b/include/scsi/scsi_tgt_if.h
deleted file mode 100644
index f2ee7c238a45..000000000000
--- a/include/scsi/scsi_tgt_if.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * SCSI target kernel/user interface
- *
- * Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org>
- * Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-#ifndef __SCSI_TARGET_IF_H
-#define __SCSI_TARGET_IF_H
-
-/* user -> kernel */
-#define	TGT_UEVENT_CMD_RSP		0x0001
-#define	TGT_UEVENT_IT_NEXUS_RSP		0x0002
-#define	TGT_UEVENT_TSK_MGMT_RSP		0x0003
-
-/* kernel -> user */
-#define	TGT_KEVENT_CMD_REQ		0x1001
-#define	TGT_KEVENT_CMD_DONE		0x1002
-#define	TGT_KEVENT_IT_NEXUS_REQ		0x1003
-#define	TGT_KEVENT_TSK_MGMT_REQ		0x1004
-
-struct tgt_event_hdr {
-	uint16_t version;
-	uint16_t status;
-	uint16_t type;
-	uint16_t len;
-} __attribute__ ((aligned (sizeof(uint64_t))));
-
-struct tgt_event {
-	struct tgt_event_hdr hdr;
-
-	union {
-		/* user-> kernel */
-		struct {
-			int host_no;
-			int result;
-			aligned_u64 itn_id;
-			aligned_u64 tag;
-			aligned_u64 uaddr;
-			aligned_u64 sense_uaddr;
-			uint32_t len;
-			uint32_t sense_len;
-			uint8_t rw;
-		} cmd_rsp;
-		struct {
-			int host_no;
-			int result;
-			aligned_u64 itn_id;
-			aligned_u64 mid;
-		} tsk_mgmt_rsp;
-		struct {
-			__s32 host_no;
-			__s32 result;
-			aligned_u64 itn_id;
-			__u32 function;
-		} it_nexus_rsp;
-
-		/* kernel -> user */
-		struct {
-			int host_no;
-			uint32_t data_len;
-			aligned_u64 itn_id;
-			uint8_t scb[16];
-			uint8_t lun[8];
-			int attribute;
-			aligned_u64 tag;
-		} cmd_req;
-		struct {
-			int host_no;
-			int result;
-			aligned_u64 itn_id;
-			aligned_u64 tag;
-		} cmd_done;
-		struct {
-			int host_no;
-			int function;
-			aligned_u64 itn_id;
-			aligned_u64 tag;
-			uint8_t lun[8];
-			aligned_u64 mid;
-		} tsk_mgmt_req;
-		struct {
-			__s32 host_no;
-			__u32 function;
-			aligned_u64 itn_id;
-			__u32 max_cmds;
-			__u8 initiator_id[16];
-		} it_nexus_req;
-	} p;
-} __attribute__ ((aligned (sizeof(uint64_t))));
-
-#define TGT_RING_SIZE (1UL << 16)
-
-#endif
diff --git a/include/scsi/scsi_transport.h b/include/scsi/scsi_transport.h
index af244f4bba53..81292392adbc 100644
--- a/include/scsi/scsi_transport.h
+++ b/include/scsi/scsi_transport.h
@@ -35,7 +35,7 @@ struct scsi_transport_template {
 	/*
 	 * If set, called from sysfs and legacy procfs rescanning code.
 	 */
-	int (*user_scan)(struct Scsi_Host *, uint, uint, uint);
+	int (*user_scan)(struct Scsi_Host *, uint, uint, u64);
 
 	/* The size of the specific transport attribute structure (a
 	 * space of this size will be left at the end of the
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 8c79980dc8f2..007a0bc01b74 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -131,6 +131,10 @@ enum fc_vport_state {
 #define FC_PORTSPEED_8GBIT		0x10
 #define FC_PORTSPEED_16GBIT		0x20
 #define FC_PORTSPEED_32GBIT		0x40
+#define FC_PORTSPEED_20GBIT		0x80
+#define FC_PORTSPEED_40GBIT		0x100
+#define FC_PORTSPEED_50GBIT		0x200
+#define FC_PORTSPEED_100GBIT		0x400
 #define FC_PORTSPEED_NOT_NEGOTIATED	(1 << 15) /* Speed not established */
 
 /*
diff --git a/include/scsi/sg.h b/include/scsi/sg.h
index a9f3c6fc3f57..750e5db7c6bf 100644
--- a/include/scsi/sg.h
+++ b/include/scsi/sg.h
@@ -4,77 +4,34 @@
 #include <linux/compiler.h>
 
 /*
-   History:
-    Started: Aug 9 by Lawrence Foard (entropy@world.std.com), to allow user
-     process control of SCSI devices.
-    Development Sponsored by Killy Corp. NY NY
-Original driver (sg.h):
-*       Copyright (C) 1992 Lawrence Foard
-Version 2 and 3 extensions to driver:
-*       Copyright (C) 1998 - 2006 Douglas Gilbert
-
-    Version: 3.5.34 (20060920)
-    This version is for 2.6 series kernels.
-
-    For a full changelog see http://www.torque.net/sg
-
-Map of SG verions to the Linux kernels in which they appear:
-       ----------        ----------------------------------
-       original          all kernels < 2.2.6
-       2.1.40            2.2.20
-       3.0.x             optional version 3 sg driver for 2.2 series
-       3.1.17++          2.4.0++
-       3.5.30++          2.6.0++
-
-Major new features in SG 3.x driver (cf SG 2.x drivers)
-	- SG_IO ioctl() combines function if write() and read()
-	- new interface (sg_io_hdr_t) but still supports old interface
-	- scatter/gather in user space, direct IO, and mmap supported
-
- The normal action of this driver is to use the adapter (HBA) driver to DMA
- data into kernel buffers and then use the CPU to copy the data into the 
- user space (vice versa for writes). That is called "indirect" IO due to 
- the double handling of data. There are two methods offered to remove the
- redundant copy: 1) direct IO and 2) using the mmap() system call to map
- the reserve buffer (this driver has one reserve buffer per fd) into the
- user space. Both have their advantages.
- In terms of absolute speed mmap() is faster. If speed is not a concern, 
- indirect IO should be fine. Read the documentation for more information.
-
- ** N.B. To use direct IO 'echo 1 > /proc/scsi/sg/allow_dio' or
-         'echo 1 > /sys/module/sg/parameters/allow_dio' is needed.
-         That attribute is 0 by default. **
- 
- Historical note: this SCSI pass-through driver has been known as "sg" for 
- a decade. In broader kernel discussions "sg" is used to refer to scatter
- gather techniques. The context should clarify which "sg" is referred to.
-
- Documentation
- =============
- A web site for the SG device driver can be found at:
-	http://www.torque.net/sg  [alternatively check the MAINTAINERS file]
- The documentation for the sg version 3 driver can be found at:
- 	http://www.torque.net/sg/p/sg_v3_ho.html
- This is a rendering from DocBook source [change the extension to "sgml"
- or "xml"]. There are renderings in "ps", "pdf", "rtf" and "txt" (soon).
- The SG_IO ioctl is now found in other parts kernel (e.g. the block layer).
- For more information see http://www.torque.net/sg/sg_io.html
-
- The older, version 2 documents discuss the original sg interface in detail:
-	http://www.torque.net/sg/p/scsi-generic.txt
-	http://www.torque.net/sg/p/scsi-generic_long.txt
- Also available: <kernel_source>/Documentation/scsi/scsi-generic.txt
-
- Utility and test programs are available at the sg web site. They are 
- packaged as sg3_utils (for the lk 2.4 and 2.6 series) and sg_utils
- (for the lk 2.2 series).
-*/
+ * History:
+ *  Started: Aug 9 by Lawrence Foard (entropy@world.std.com), to allow user
+ *   process control of SCSI devices.
+ *  Development Sponsored by Killy Corp. NY NY
+ *
+ * Original driver (sg.h):
+ *       Copyright (C) 1992 Lawrence Foard
+ * Version 2 and 3 extensions to driver:
+ *	Copyright (C) 1998 - 2014 Douglas Gilbert
+ *
+ *  Version: 3.5.36 (20140603)
+ *  This version is for 2.6 and 3 series kernels.
+ *
+ * Documentation
+ * =============
+ * A web site for the SG device driver can be found at:
+ *	http://sg.danny.cz/sg  [alternatively check the MAINTAINERS file]
+ * The documentation for the sg version 3 driver can be found at:
+ *	http://sg.danny.cz/sg/p/sg_v3_ho.html
+ * Also see: <kernel_source>/Documentation/scsi/scsi-generic.txt
+ *
+ * For utility and test programs see: http://sg.danny.cz/sg/sg3_utils.html
+ */
 
 #ifdef __KERNEL__
 extern int sg_big_buff; /* for sysctl */
 #endif
 
-/* New interface introduced in the 3.x SG drivers follows */
 
 typedef struct sg_iovec /* same structure as used by readv() Linux system */
 {                       /* call. It defines one scatter-gather element. */
@@ -87,7 +44,7 @@ typedef struct sg_io_hdr
 {
     int interface_id;           /* [i] 'S' for SCSI generic (required) */
     int dxfer_direction;        /* [i] data transfer direction  */
-    unsigned char cmd_len;      /* [i] SCSI command length ( <= 16 bytes) */
+    unsigned char cmd_len;      /* [i] SCSI command length */
     unsigned char mx_sb_len;    /* [i] max length to write to sbp */
     unsigned short iovec_count; /* [i] 0 implies no scatter gather */
     unsigned int dxfer_len;     /* [i] byte count of data transfer */
@@ -129,6 +86,9 @@ typedef struct sg_io_hdr
 #define SG_FLAG_MMAP_IO 4       /* request memory mapped IO */
 #define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */
 				/* user space (debug indirect IO) */
+/* defaults:: for sg driver: Q_AT_HEAD; for block layer: Q_AT_TAIL */
+#define SG_FLAG_Q_AT_TAIL 0x10
+#define SG_FLAG_Q_AT_HEAD 0x20
 
 /* following 'info' values are "or"-ed together */
 #define SG_INFO_OK_MASK 0x1