Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull first round of SCSI updates from James Bottomley:
 "This patch consists of the usual driver updates (megaraid_sas,
  scsi_debug, qla2xxx, qla4xxx, lpfc, bnx2fc, be2iscsi, hpsa, ipr) plus
  an assortment of minor fixes and the first precursors of SCSI-MQ (the
  code path simplifications) and the bug fix for the USB oops on remove
  (which involves an infrastructure change, so is sent via the main tree
  with a delayed backport after a cycle in which it is shown to
  introduce no new bugs)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (196 commits)
  [SCSI] sd: Quiesce mode sense error messages
  [SCSI] add support for per-host cmd pools
  [SCSI] simplify command allocation and freeing a bit
  [SCSI] megaraid: simplify internal command handling
  [SCSI] ses: Use vpd information from scsi_device
  [SCSI] Add EVPD page 0x83 and 0x80 to sysfs
  [SCSI] Return VPD page length in scsi_vpd_inquiry()
  [SCSI] scsi_sysfs: Implement 'is_visible' callback
  [SCSI] hpsa: update driver version to 3.4.4-1
  [SCSI] hpsa: fix bad endif placement in RAID 5 mapper code
  [SCSI] qla2xxx: Fix build errors related to invalid print fields on some architectures.
  [SCSI] bfa: Replace large udelay() with mdelay()
  [SCSI] vmw_pvscsi: Some improvements in pvscsi driver.
  [SCSI] vmw_pvscsi: Add support for I/O requests coalescing.
  [SCSI] vmw_pvscsi: Fix pvscsi_abort() function.
  [SCSI] remove deprecated IRQF_DISABLED from SCSI
  [SCSI] bfa: Updating Maintainers email ids
  [SCSI] ipr: Add new CCIN definition for Grand Canyon support
  [SCSI] ipr: Format HCAM overlay ID 0x21
  [SCSI] ipr: Use pci_enable_msi_range() and pci_enable_msix_range()
  ...

6 files changed, 43 insertions, 12 deletions

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 309f51336fb..7221a24e821 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -327,12 +327,19 @@ struct iscsi_session {
 	struct iscsi_transport	*tt;
 	struct Scsi_Host	*host;
 	struct iscsi_conn	*leadconn;	/* leading connection */
-	spinlock_t		lock;		/* protects session state, *
-						 * sequence numbers,       *
+	/* Between the forward and the backward locks exists a strict locking
+	 * hierarchy. The mutual exclusion zone protected by the forward lock
+	 * can enclose the mutual exclusion zone protected by the backward lock
+	 * but not vice versa.
+	 */
+	spinlock_t		frwd_lock;	/* protects session state, *
+						 * cmdsn, queued_cmdsn     *
 						 * session resources:      *
-						 * - cmdpool,		   *
-						 * - mgmtpool,		   *
-						 * - r2tpool		   */
+						 * - cmdpool kfifo_out ,   *
+						 * - mgmtpool,		   */
+	spinlock_t		back_lock;	/* protects cmdsn_exp      *
+						 * cmdsn_max,              *
+						 * cmdpool kfifo_in        */
 	int			state;		/* session state           */
 	int			age;		/* counts session re-opens */
 
diff --git a/include/scsi/libiscsi_tcp.h b/include/scsi/libiscsi_tcp.h
index 215469a9b80..2a7aa75dd00 100644
--- a/include/scsi/libiscsi_tcp.h
+++ b/include/scsi/libiscsi_tcp.h
@@ -83,6 +83,8 @@ struct iscsi_tcp_task {
 	struct iscsi_pool	r2tpool;
 	struct kfifo		r2tqueue;
 	void			*dd_data;
+	spinlock_t		pool2queue;
+	spinlock_t		queue2pool;
 };
 
 enum {
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 91558a1f97f..dd7c998221b 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -142,8 +142,7 @@ 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 *,
-			       struct device *);
+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,
@@ -156,9 +155,6 @@ 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);
 
-struct scsi_cmnd *scsi_allocate_command(gfp_t gfp_mask);
-void scsi_free_command(gfp_t gfp_mask, struct scsi_cmnd *cmd);
-
 static inline unsigned scsi_sg_count(struct scsi_cmnd *cmd)
 {
 	return cmd->sdb.table.nents;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index d65fbec2533..4e845b80efd 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -113,6 +113,12 @@ struct scsi_device {
 	const char * vendor;		/* [back_compat] point into 'inquiry' ... */
 	const char * model;		/* ... after scan; point to static string */
 	const char * rev;		/* ... "nullnullnullnull" before scan */
+
+#define SCSI_VPD_PG_LEN                255
+	int vpd_pg83_len;
+	unsigned char *vpd_pg83;
+	int vpd_pg80_len;
+	unsigned char *vpd_pg80;
 	unsigned char current_tag;	/* current tag */
 	struct scsi_target      *sdev_target;   /* used only for single_lun */
 
@@ -235,12 +241,24 @@ struct scsi_dh_data {
 #define sdev_printk(prefix, sdev, fmt, a...)	\
 	dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
 
+#define sdev_dbg(sdev, fmt, a...) \
+	dev_dbg(&(sdev)->sdev_gendev, fmt, ##a)
+
 #define scmd_printk(prefix, scmd, fmt, a...)				\
         (scmd)->request->rq_disk ?					\
 	sdev_printk(prefix, (scmd)->device, "[%s] " fmt,		\
 		    (scmd)->request->rq_disk->disk_name, ##a) :		\
 	sdev_printk(prefix, (scmd)->device, fmt, ##a)
 
+#define scmd_dbg(scmd, fmt, a...)					   \
+	do {								   \
+		if ((scmd)->request->rq_disk)				   \
+			sdev_dbg((scmd)->device, "[%s] " fmt,		   \
+				 (scmd)->request->rq_disk->disk_name, ##a);\
+		else							   \
+			sdev_dbg((scmd)->device, fmt, ##a);		   \
+	} while (0)
+
 enum scsi_target_state {
 	STARGET_CREATED = 1,
 	STARGET_RUNNING,
@@ -257,7 +275,7 @@ struct scsi_target {
 	struct list_head	siblings;
 	struct list_head	devices;
 	struct device		dev;
-	unsigned int		reap_ref; /* protected by the host lock */
+	struct kref		reap_ref; /* last put renders target invisible */
 	unsigned int		channel;
 	unsigned int		id; /* target id ... replace
 				     * scsi_device.id eventually */
@@ -284,7 +302,6 @@ struct scsi_target {
 #define SCSI_DEFAULT_TARGET_BLOCKED	3
 
 	char			scsi_level;
-	struct execute_work	ew;
 	enum scsi_target_state	state;
 	void 			*hostdata; /* available to low-level driver */
 	unsigned long		starget_data[0]; /* for the transport */
@@ -309,6 +326,7 @@ extern int scsi_add_device(struct Scsi_Host *host, uint channel,
 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);
+void scsi_attach_vpd(struct scsi_device *sdev);
 
 extern int scsi_device_get(struct scsi_device *);
 extern void scsi_device_put(struct scsi_device *);
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 53075e5039e..94844fc77b9 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -15,6 +15,7 @@ struct completion;
 struct module;
 struct scsi_cmnd;
 struct scsi_device;
+struct scsi_host_cmd_pool;
 struct scsi_target;
 struct Scsi_Host;
 struct scsi_host_cmd_pool;
@@ -524,6 +525,12 @@ struct scsi_host_template {
 	 *   scsi_netlink.h
 	 */
 	u64 vendor_id;
+
+	/*
+	 * Additional per-command data allocated for the driver.
+	 */
+	unsigned int cmd_size;
+	struct scsi_host_cmd_pool *cmd_pool;
 };
 
 /*
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index b797e8fad66..8c79980dc8f 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -130,6 +130,7 @@ enum fc_vport_state {
 #define FC_PORTSPEED_4GBIT		8
 #define FC_PORTSPEED_8GBIT		0x10
 #define FC_PORTSPEED_16GBIT		0x20
+#define FC_PORTSPEED_32GBIT		0x40
 #define FC_PORTSPEED_NOT_NEGOTIATED	(1 << 15) /* Speed not established */
 
 /*