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kernel/linux-imx6_3.14.28/include/linux/usb/uas.h 1.9 KB
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  #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