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uas.h
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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 */
8 struct iu {
9  __u8 iu_id;
10  __u8 rsvd1;
11  __be16 tag;
12 };
13 
14 enum {
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 
23 enum {
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 
35 enum {
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 
45 struct 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 };
56 
57 struct 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 };
66 
67 /*
68  * Also used for the Read Ready and Write Ready IUs since they have the
69  * same first four bytes
70  */
71 struct 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 };
81 
82 struct response_ui {
83  __u8 iu_id;
84  __u8 rsvd1;
85  __be16 tag;
86  __be16 add_response_info;
87  __u8 response_code;
88 };
89 
90 struct usb_pipe_usage_descriptor {
91  __u8 bLength;
92  __u8 bDescriptorType;
93 
94  __u8 bPipeID;
95  __u8 Reserved;
96 } __attribute__((__packed__));
97 
98 enum {
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
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