Merge branch 'bsg' of git://git.kernel.dk/data/git/linux-2.6-block

* 'bsg' of git://git.kernel.dk/data/git/linux-2.6-block: (25 commits)
  bsg: Kconfig updates
  bsg: add SCSI transport-level request support
  bsg: add bidi support
  add a struct request pointer to the request structure
  bsg: fix the deadlock on discarding done commands
  bsg: fix a blocking read bug
  bsg: minor bug fixes
  improve bsg device allocation
  bind bsg to all SCSI devices
  bsg: bind bsg to request_queue instead of gendisk
  bsg: add a request_queue argument to scsi_cmd_ioctl()
  bsg: simplify __bsg_alloc_command failpath
  bsg: add cheasy error checks for sysfs stuff
  Add queue resizing support
  Replace s32, u32 and u64 with __s32, __u32 and __u64 in bsg.h for userspace
  bsg: silence a bogus gcc warning
  bsg: style cleanup
  bsg: use u32 etc instead of uint32_t
  bsg: add SG_IO to SG v4
  bsg: replace SG v3 with SG v4
  ...

1 files changed, 70 insertions, 0 deletions

diff --git a/include/linux/bsg.h b/include/linux/bsg.h
new file mode 100644
index 000000000000..bd998ca6cb2e
--- /dev/null
+++ b/include/linux/bsg.h
@@ -0,0 +1,70 @@
+#ifndef BSG_H
+#define BSG_H
+
+#define BSG_PROTOCOL_SCSI               0
+
+#define BSG_SUB_PROTOCOL_SCSI_CMD       0
+#define BSG_SUB_PROTOCOL_SCSI_TMF       1
+#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
+
+struct sg_io_v4 {
+        __s32 guard;            /* [i] 'Q' to differentiate from v3 */
+        __u32 protocol;         /* [i] 0 -> SCSI , .... */
+        __u32 subprotocol;      /* [i] 0 -> SCSI command, 1 -> SCSI task
+                                   management function, .... */
+
+        __u32 request_len;      /* [i] in bytes */
+        __u64 request;          /* [i], [*i] {SCSI: cdb} */
+        __u32 request_attr;     /* [i] {SCSI: task attribute} */
+        __u32 request_tag;      /* [i] {SCSI: task tag (only if flagged)} */
+        __u32 request_priority; /* [i] {SCSI: task priority} */
+        __u32 max_response_len; /* [i] in bytes */
+        __u64 response;         /* [i], [*o] {SCSI: (auto)sense data} */
+
+        /* "din_" for data in (from device); "dout_" for data out (to device) */
+        __u32 dout_xfer_len;    /* [i] bytes to be transferred to device */
+        __u32 din_xfer_len;     /* [i] bytes to be transferred from device */
+        __u64 dout_xferp;       /* [i], [*i] */
+        __u64 din_xferp;        /* [i], [*o] */
+
+        __u32 timeout;          /* [i] units: millisecond */
+        __u32 flags;            /* [i] bit mask */
+        __u64 usr_ptr;          /* [i->o] unused internally */
+        __u32 spare_in;         /* [i] */
+
+        __u32 driver_status;    /* [o] 0 -> ok */
+        __u32 transport_status; /* [o] 0 -> ok */
+        __u32 device_status;    /* [o] {SCSI: command completion status} */
+        __u32 retry_delay;      /* [o] {SCSI: status auxiliary information} */
+        __u32 info;             /* [o] additional information */
+        __u32 duration;         /* [o] time to complete, in milliseconds */
+        __u32 response_len;     /* [o] bytes of response actually written */
+        __s32 din_resid;        /* [o] actual_din_xfer_len - din_xfer_len */
+        __u32 generated_tag;    /* [o] {SCSI: task tag that transport chose} */
+        __u32 spare_out;        /* [o] */
+
+        __u32 padding;
+};
+
+#ifdef __KERNEL__
+
+#if defined(CONFIG_BLK_DEV_BSG)
+struct bsg_class_device {
+        struct class_device *class_dev;
+        struct device *dev;
+        int minor;
+        struct list_head list;
+        struct request_queue *queue;
+};
+
+extern int bsg_register_queue(struct request_queue *, const char *);
+extern void bsg_unregister_queue(struct request_queue *);
+#else
+struct bsg_class_device { };
+#define bsg_register_queue(disk, name)          (0)
+#define bsg_unregister_queue(disk)      do { } while (0)
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif