1 #ifndef BSG_H 2 #define BSG_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 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
