1#ifndef _UAPIBSG_H
2#define _UAPIBSG_H
3
4#include <linux/types.h>
5
6#define BSG_PROTOCOL_SCSI		0
7
8#define BSG_SUB_PROTOCOL_SCSI_CMD	0
9#define BSG_SUB_PROTOCOL_SCSI_TMF	1
10#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT	2
11
12/*
13 * For flags member below
14 * sg.h sg_io_hdr also has bits defined for it's flags member. However
15 * none of these bits are implemented/used by bsg. The bits below are
16 * allocated to not conflict with sg.h ones anyway.
17 */
18#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
19
20struct sg_io_v4 {
21	__s32 guard;		/* [i] 'Q' to differentiate from v3 */
22	__u32 protocol;		/* [i] 0 -> SCSI , .... */
23	__u32 subprotocol;	/* [i] 0 -> SCSI command, 1 -> SCSI task
24				   management function, .... */
25
26	__u32 request_len;	/* [i] in bytes */
27	__u64 request;		/* [i], [*i] {SCSI: cdb} */
28	__u64 request_tag;	/* [i] {SCSI: task tag (only if flagged)} */
29	__u32 request_attr;	/* [i] {SCSI: task attribute} */
30	__u32 request_priority;	/* [i] {SCSI: task priority} */
31	__u32 request_extra;	/* [i] {spare, for padding} */
32	__u32 max_response_len;	/* [i] in bytes */
33	__u64 response;		/* [i], [*o] {SCSI: (auto)sense data} */
34
35        /* "dout_": data out (to device); "din_": data in (from device) */
36	__u32 dout_iovec_count;	/* [i] 0 -> "flat" dout transfer else
37				   dout_xfer points to array of iovec */
38	__u32 dout_xfer_len;	/* [i] bytes to be transferred to device */
39	__u32 din_iovec_count;	/* [i] 0 -> "flat" din transfer */
40	__u32 din_xfer_len;	/* [i] bytes to be transferred from device */
41	__u64 dout_xferp;	/* [i], [*i] */
42	__u64 din_xferp;	/* [i], [*o] */
43
44	__u32 timeout;		/* [i] units: millisecond */
45	__u32 flags;		/* [i] bit mask */
46	__u64 usr_ptr;		/* [i->o] unused internally */
47	__u32 spare_in;		/* [i] */
48
49	__u32 driver_status;	/* [o] 0 -> ok */
50	__u32 transport_status;	/* [o] 0 -> ok */
51	__u32 device_status;	/* [o] {SCSI: command completion status} */
52	__u32 retry_delay;	/* [o] {SCSI: status auxiliary information} */
53	__u32 info;		/* [o] additional information */
54	__u32 duration;		/* [o] time to complete, in milliseconds */
55	__u32 response_len;	/* [o] bytes of response actually written */
56	__s32 din_resid;	/* [o] din_xfer_len - actual_din_xfer_len */
57	__s32 dout_resid;	/* [o] dout_xfer_len - actual_dout_xfer_len */
58	__u64 generated_tag;	/* [o] {SCSI: transport generated task tag} */
59	__u32 spare_out;	/* [o] */
60
61	__u32 padding;
62};
63
64
65#endif /* _UAPIBSG_H */
66