1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __USB_UAS_H__
3 #define __USB_UAS_H__
4
5 #include <scsi/scsi.h>
6 #include <scsi/scsi_cmnd.h>
7
8 /* Common header for all IUs */
9 struct iu {
10 __u8 iu_id;
11 __u8 rsvd1;
12 __be16 tag;
13 } __attribute__((__packed__));
14
15 enum {
16 IU_ID_COMMAND = 0x01,
17 IU_ID_STATUS = 0x03,
18 IU_ID_RESPONSE = 0x04,
19 IU_ID_TASK_MGMT = 0x05,
20 IU_ID_READ_READY = 0x06,
21 IU_ID_WRITE_READY = 0x07,
22 };
23
24 enum {
25 TMF_ABORT_TASK = 0x01,
26 TMF_ABORT_TASK_SET = 0x02,
27 TMF_CLEAR_TASK_SET = 0x04,
28 TMF_LOGICAL_UNIT_RESET = 0x08,
29 TMF_I_T_NEXUS_RESET = 0x10,
30 TMF_CLEAR_ACA = 0x40,
31 TMF_QUERY_TASK = 0x80,
32 TMF_QUERY_TASK_SET = 0x81,
33 TMF_QUERY_ASYNC_EVENT = 0x82,
34 };
35
36 enum {
37 RC_TMF_COMPLETE = 0x00,
38 RC_INVALID_INFO_UNIT = 0x02,
39 RC_TMF_NOT_SUPPORTED = 0x04,
40 RC_TMF_FAILED = 0x05,
41 RC_TMF_SUCCEEDED = 0x08,
42 RC_INCORRECT_LUN = 0x09,
43 RC_OVERLAPPED_TAG = 0x0a,
44 };
45
46 struct command_iu {
47 __u8 iu_id;
48 __u8 rsvd1;
49 __be16 tag;
50 __u8 prio_attr;
51 __u8 rsvd5;
52 __u8 len;
53 __u8 rsvd7;
54 struct scsi_lun lun;
55 __u8 cdb[16]; /* XXX: Overflow-checking tools may misunderstand */
56 } __attribute__((__packed__));
57
58 struct task_mgmt_iu {
59 __u8 iu_id;
60 __u8 rsvd1;
61 __be16 tag;
62 __u8 function;
63 __u8 rsvd2;
64 __be16 task_tag;
65 struct scsi_lun lun;
66 } __attribute__((__packed__));
67
68 /*
69 * Also used for the Read Ready and Write Ready IUs since they have the
70 * same first four bytes
71 */
72 struct sense_iu {
73 __u8 iu_id;
74 __u8 rsvd1;
75 __be16 tag;
76 __be16 status_qual;
77 __u8 status;
78 __u8 rsvd7[7];
79 __be16 len;
80 __u8 sense[SCSI_SENSE_BUFFERSIZE];
81 } __attribute__((__packed__));
82
83 struct response_iu {
84 __u8 iu_id;
85 __u8 rsvd1;
86 __be16 tag;
87 __u8 add_response_info[3];
88 __u8 response_code;
89 } __attribute__((__packed__));
90
91 struct usb_pipe_usage_descriptor {
92 __u8 bLength;
93 __u8 bDescriptorType;
94
95 __u8 bPipeID;
96 __u8 Reserved;
97 } __attribute__((__packed__));
98
99 enum {
100 CMD_PIPE_ID = 1,
101 STATUS_PIPE_ID = 2,
102 DATA_IN_PIPE_ID = 3,
103 DATA_OUT_PIPE_ID = 4,
104
105 UAS_SIMPLE_TAG = 0,
106 UAS_HEAD_TAG = 1,
107 UAS_ORDERED_TAG = 2,
108 UAS_ACA = 4,
109 };
110 #endif
111
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