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- #ifndef BSG_H
- #define BSG_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 flag constants below:
- * sg.h sg_io_hdr also has bits defined for it's flags member. These
- * two flag values (0x10 and 0x20) have the same meaning in sg.h . For
- * bsg the BSG_FLAG_Q_AT_HEAD flag is ignored since it is the deafult.
- */
- #define BSG_FLAG_Q_AT_TAIL 0x10 /* default is Q_AT_HEAD */
- #define BSG_FLAG_Q_AT_HEAD 0x20
- 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 /* BSG_H */
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