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01: #ifndef BSG_H
02: #define BSG_H
03: 
04: #include <linux/types.h>
05: 
06: #define BSG_PROTOCOL_SCSI               0
07: 
08: #define BSG_SUB_PROTOCOL_SCSI_CMD       0
09: #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: 
20: struct 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
66: 

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