1 files changed, 65 insertions, 0 deletions

diff --git a/include/uapi/linux/bsg.h b/include/uapi/linux/bsg.h
new file mode 100644
index 000000000000..7a12e1c0f371
--- /dev/null
+++ b/include/uapi/linux/bsg.h
@@ -0,0 +1,65 @@
+#ifndef _UAPIBSG_H
+#define _UAPIBSG_H
+
+#include <linux/types.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
+
+/*
+ * For flags member below
+ * sg.h sg_io_hdr also has bits defined for it's flags member. However
+ * none of these bits are implemented/used by bsg. The bits below are
+ * allocated to not conflict with sg.h ones anyway.
+ */
+#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
+
+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} */
+        __u64 request_tag;      /* [i] {SCSI: task tag (only if flagged)} */
+        __u32 request_attr;     /* [i] {SCSI: task attribute} */
+        __u32 request_priority; /* [i] {SCSI: task priority} */
+        __u32 request_extra;    /* [i] {spare, for padding} */
+        __u32 max_response_len; /* [i] in bytes */
+        __u64 response;         /* [i], [*o] {SCSI: (auto)sense data} */
+
+        /* "dout_": data out (to device); "din_": data in (from device) */
+        __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else
+                                   dout_xfer points to array of iovec */
+        __u32 dout_xfer_len;    /* [i] bytes to be transferred to device */
+        __u32 din_iovec_count;  /* [i] 0 -> "flat" din transfer */
+        __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] din_xfer_len - actual_din_xfer_len */
+        __s32 dout_resid;       /* [o] dout_xfer_len - actual_dout_xfer_len */
+        __u64 generated_tag;    /* [o] {SCSI: transport generated task tag} */
+        __u32 spare_out;        /* [o] */
+
+        __u32 padding;
+};
+
+
+#endif /* _UAPIBSG_H */