/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */#ifndef _UAPIBSG_H#define _UAPIBSG_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 /* _UAPIBSG_H */