1#ifndef __USB_UAS_H__
2#define __USB_UAS_H__
3
4#include <scsi/scsi.h>
5#include <scsi/scsi_cmnd.h>
6
7/* Common header for all IUs */
8struct iu {
9	__u8 iu_id;
10	__u8 rsvd1;
11	__be16 tag;
12} __attribute__((__packed__));
13
14enum {
15	IU_ID_COMMAND		= 0x01,
16	IU_ID_STATUS		= 0x03,
17	IU_ID_RESPONSE		= 0x04,
18	IU_ID_TASK_MGMT		= 0x05,
19	IU_ID_READ_READY	= 0x06,
20	IU_ID_WRITE_READY	= 0x07,
21};
22
23enum {
24	TMF_ABORT_TASK          = 0x01,
25	TMF_ABORT_TASK_SET      = 0x02,
26	TMF_CLEAR_TASK_SET      = 0x04,
27	TMF_LOGICAL_UNIT_RESET  = 0x08,
28	TMF_I_T_NEXUS_RESET     = 0x10,
29	TMF_CLEAR_ACA           = 0x40,
30	TMF_QUERY_TASK          = 0x80,
31	TMF_QUERY_TASK_SET      = 0x81,
32	TMF_QUERY_ASYNC_EVENT   = 0x82,
33};
34
35enum {
36	RC_TMF_COMPLETE         = 0x00,
37	RC_INVALID_INFO_UNIT    = 0x02,
38	RC_TMF_NOT_SUPPORTED    = 0x04,
39	RC_TMF_FAILED           = 0x05,
40	RC_TMF_SUCCEEDED        = 0x08,
41	RC_INCORRECT_LUN        = 0x09,
42	RC_OVERLAPPED_TAG       = 0x0a,
43};
44
45struct command_iu {
46	__u8 iu_id;
47	__u8 rsvd1;
48	__be16 tag;
49	__u8 prio_attr;
50	__u8 rsvd5;
51	__u8 len;
52	__u8 rsvd7;
53	struct scsi_lun lun;
54	__u8 cdb[16];	/* XXX: Overflow-checking tools may misunderstand */
55} __attribute__((__packed__));
56
57struct task_mgmt_iu {
58	__u8 iu_id;
59	__u8 rsvd1;
60	__be16 tag;
61	__u8 function;
62	__u8 rsvd2;
63	__be16 task_tag;
64	struct scsi_lun lun;
65} __attribute__((__packed__));
66
67/*
68 * Also used for the Read Ready and Write Ready IUs since they have the
69 * same first four bytes
70 */
71struct sense_iu {
72	__u8 iu_id;
73	__u8 rsvd1;
74	__be16 tag;
75	__be16 status_qual;
76	__u8 status;
77	__u8 rsvd7[7];
78	__be16 len;
79	__u8 sense[SCSI_SENSE_BUFFERSIZE];
80} __attribute__((__packed__));
81
82struct response_iu {
83	__u8 iu_id;
84	__u8 rsvd1;
85	__be16 tag;
86	__u8 add_response_info[3];
87	__u8 response_code;
88} __attribute__((__packed__));
89
90struct usb_pipe_usage_descriptor {
91	__u8  bLength;
92	__u8  bDescriptorType;
93
94	__u8  bPipeID;
95	__u8  Reserved;
96} __attribute__((__packed__));
97
98enum {
99	CMD_PIPE_ID		= 1,
100	STATUS_PIPE_ID		= 2,
101	DATA_IN_PIPE_ID		= 3,
102	DATA_OUT_PIPE_ID	= 4,
103
104	UAS_SIMPLE_TAG		= 0,
105	UAS_HEAD_TAG		= 1,
106	UAS_ORDERED_TAG		= 2,
107	UAS_ACA			= 4,
108};
109#endif
110