#ifndef __USB_UAS_H__
#define __USB_UAS_H__

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>

/* Common header for all IUs */
struct iu {
__u8 iu_id;
__u8 rsvd1;
__be16 tag;
};

enum {
IU_ID_COMMAND = 0x01,
IU_ID_STATUS = 0x03,
IU_ID_RESPONSE = 0x04,
IU_ID_TASK_MGMT = 0x05,
IU_ID_READ_READY = 0x06,
IU_ID_WRITE_READY = 0x07,
};

enum {
TMF_ABORT_TASK = 0x01,
TMF_ABORT_TASK_SET = 0x02,
TMF_CLEAR_TASK_SET = 0x04,
TMF_LOGICAL_UNIT_RESET = 0x08,
TMF_I_T_NEXUS_RESET = 0x10,
TMF_CLEAR_ACA = 0x40,
TMF_QUERY_TASK = 0x80,
TMF_QUERY_TASK_SET = 0x81,
TMF_QUERY_ASYNC_EVENT = 0x82,
};

enum {
RC_TMF_COMPLETE = 0x00,
RC_INVALID_INFO_UNIT = 0x02,
RC_TMF_NOT_SUPPORTED = 0x04,
RC_TMF_FAILED = 0x05,
RC_TMF_SUCCEEDED = 0x08,
RC_INCORRECT_LUN = 0x09,
RC_OVERLAPPED_TAG = 0x0a,
};

struct command_iu {
__u8 iu_id;
__u8 rsvd1;
__be16 tag;
__u8 prio_attr;
__u8 rsvd5;
__u8 len;
__u8 rsvd7;
struct scsi_lun lun;
__u8 cdb[16]; /* XXX: Overflow-checking tools may misunderstand */
};

struct task_mgmt_iu {
__u8 iu_id;
__u8 rsvd1;
__be16 tag;
__u8 function;
__u8 rsvd2;
__be16 task_tag;
struct scsi_lun lun;
};

/*
* Also used for the Read Ready and Write Ready IUs since they have the
* same first four bytes
*/
struct sense_iu {
__u8 iu_id;
__u8 rsvd1;
__be16 tag;
__be16 status_qual;
__u8 status;
__u8 rsvd7[7];
__be16 len;
__u8 sense[SCSI_SENSE_BUFFERSIZE];
};

struct response_ui {
__u8 iu_id;
__u8 rsvd1;
__be16 tag;
__be16 add_response_info;
__u8 response_code;
};

struct usb_pipe_usage_descriptor {
__u8 bLength;
__u8 bDescriptorType;

__u8 bPipeID;
__u8 Reserved;
} __attribute__((__packed__));

enum {
CMD_PIPE_ID = 1,
STATUS_PIPE_ID = 2,
DATA_IN_PIPE_ID = 3,
DATA_OUT_PIPE_ID = 4,

UAS_SIMPLE_TAG = 0,
UAS_HEAD_TAG = 1,
UAS_ORDERED_TAG = 2,
UAS_ACA = 4,
};
#endif