root/include/linux/usb/uas.h

#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;
} __attribute__((__packed__));

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 */
} __attribute__((__packed__));

struct task_mgmt_iu {
        __u8 iu_id;
        __u8 rsvd1;
        __be16 tag;
        __u8 function;
        __u8 rsvd2;
        __be16 task_tag;
        struct scsi_lun lun;
} __attribute__((__packed__));

/*
 * 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];
} __attribute__((__packed__));

struct response_iu {
        __u8 iu_id;
        __u8 rsvd1;
        __be16 tag;
        __u8 add_response_info[3];
        __u8 response_code;
} __attribute__((__packed__));

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