| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 | |
| 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 /* _UAPIBSG_H */ |