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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * This header file contains public constants and structures used by
4 * both the SCSI initiator and the SCSI target code.
5 *
6 * For documentation on the OPCODES, MESSAGES, and SENSE values,
7 * please consult the SCSI standard.
8 */
9
10#ifndef _SCSI_PROTO_H_
11#define _SCSI_PROTO_H_
12
13#include <linux/build_bug.h>
14#include <linux/types.h>
15
16/*
17 * SCSI opcodes
18 */
19
20#define TEST_UNIT_READY 0x00
21#define REZERO_UNIT 0x01
22#define REQUEST_SENSE 0x03
23#define FORMAT_UNIT 0x04
24#define READ_BLOCK_LIMITS 0x05
25#define REASSIGN_BLOCKS 0x07
26#define INITIALIZE_ELEMENT_STATUS 0x07
27#define READ_6 0x08
28#define WRITE_6 0x0a
29#define SEEK_6 0x0b
30#define READ_REVERSE 0x0f
31#define WRITE_FILEMARKS 0x10
32#define SPACE 0x11
33#define INQUIRY 0x12
34#define RECOVER_BUFFERED_DATA 0x14
35#define MODE_SELECT 0x15
36#define RESERVE 0x16
37#define RELEASE 0x17
38#define COPY 0x18
39#define ERASE 0x19
40#define MODE_SENSE 0x1a
41#define START_STOP 0x1b
42#define RECEIVE_DIAGNOSTIC 0x1c
43#define SEND_DIAGNOSTIC 0x1d
44#define ALLOW_MEDIUM_REMOVAL 0x1e
45
46#define READ_FORMAT_CAPACITIES 0x23
47#define SET_WINDOW 0x24
48#define READ_CAPACITY 0x25
49#define READ_10 0x28
50#define WRITE_10 0x2a
51#define SEEK_10 0x2b
52#define POSITION_TO_ELEMENT 0x2b
53#define WRITE_VERIFY 0x2e
54#define VERIFY 0x2f
55#define SEARCH_HIGH 0x30
56#define SEARCH_EQUAL 0x31
57#define SEARCH_LOW 0x32
58#define SET_LIMITS 0x33
59#define PRE_FETCH 0x34
60#define READ_POSITION 0x34
61#define SYNCHRONIZE_CACHE 0x35
62#define LOCK_UNLOCK_CACHE 0x36
63#define READ_DEFECT_DATA 0x37
64#define MEDIUM_SCAN 0x38
65#define COMPARE 0x39
66#define COPY_VERIFY 0x3a
67#define WRITE_BUFFER 0x3b
68#define READ_BUFFER 0x3c
69#define UPDATE_BLOCK 0x3d
70#define READ_LONG 0x3e
71#define WRITE_LONG 0x3f
72#define CHANGE_DEFINITION 0x40
73#define WRITE_SAME 0x41
74#define UNMAP 0x42
75#define READ_TOC 0x43
76#define READ_HEADER 0x44
77#define GET_EVENT_STATUS_NOTIFICATION 0x4a
78#define LOG_SELECT 0x4c
79#define LOG_SENSE 0x4d
80#define XDWRITEREAD_10 0x53
81#define MODE_SELECT_10 0x55
82#define RESERVE_10 0x56
83#define RELEASE_10 0x57
84#define MODE_SENSE_10 0x5a
85#define PERSISTENT_RESERVE_IN 0x5e
86#define PERSISTENT_RESERVE_OUT 0x5f
87#define VARIABLE_LENGTH_CMD 0x7f
88#define REPORT_LUNS 0xa0
89#define SECURITY_PROTOCOL_IN 0xa2
90#define MAINTENANCE_IN 0xa3
91#define MAINTENANCE_OUT 0xa4
92#define MOVE_MEDIUM 0xa5
93#define EXCHANGE_MEDIUM 0xa6
94#define READ_12 0xa8
95#define SERVICE_ACTION_OUT_12 0xa9
96#define WRITE_12 0xaa
97#define READ_MEDIA_SERIAL_NUMBER 0xab /* Obsolete with SPC-2 */
98#define SERVICE_ACTION_IN_12 0xab
99#define WRITE_VERIFY_12 0xae
100#define VERIFY_12 0xaf
101#define SEARCH_HIGH_12 0xb0
102#define SEARCH_EQUAL_12 0xb1
103#define SEARCH_LOW_12 0xb2
104#define SECURITY_PROTOCOL_OUT 0xb5
105#define READ_ELEMENT_STATUS 0xb8
106#define SEND_VOLUME_TAG 0xb6
107#define WRITE_LONG_2 0xea
108#define EXTENDED_COPY 0x83
109#define RECEIVE_COPY_RESULTS 0x84
110#define ACCESS_CONTROL_IN 0x86
111#define ACCESS_CONTROL_OUT 0x87
112#define READ_16 0x88
113#define COMPARE_AND_WRITE 0x89
114#define WRITE_16 0x8a
115#define READ_ATTRIBUTE 0x8c
116#define WRITE_ATTRIBUTE 0x8d
117#define WRITE_VERIFY_16 0x8e
118#define VERIFY_16 0x8f
119#define SYNCHRONIZE_CACHE_16 0x91
120#define WRITE_SAME_16 0x93
121#define ZBC_OUT 0x94
122#define ZBC_IN 0x95
123#define SERVICE_ACTION_BIDIRECTIONAL 0x9d
124#define SERVICE_ACTION_IN_16 0x9e
125#define SERVICE_ACTION_OUT_16 0x9f
126/* values for service action in */
127#define SAI_READ_CAPACITY_16 0x10
128#define SAI_GET_LBA_STATUS 0x12
129#define SAI_REPORT_REFERRALS 0x13
130#define SAI_GET_STREAM_STATUS 0x16
131/* values for maintenance in */
132#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
133#define MI_REPORT_TARGET_PGS 0x0a
134#define MI_REPORT_ALIASES 0x0b
135#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
136#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
137#define MI_REPORT_PRIORITY 0x0e
138#define MI_REPORT_TIMESTAMP 0x0f
139#define MI_MANAGEMENT_PROTOCOL_IN 0x10
140/* value for MI_REPORT_TARGET_PGS ext header */
141#define MI_EXT_HDR_PARAM_FMT 0x20
142/* values for maintenance out */
143#define MO_SET_IDENTIFYING_INFORMATION 0x06
144#define MO_SET_TARGET_PGS 0x0a
145#define MO_CHANGE_ALIASES 0x0b
146#define MO_SET_PRIORITY 0x0e
147#define MO_SET_TIMESTAMP 0x0f
148#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
149/* values for ZBC_IN */
150#define ZI_REPORT_ZONES 0x00
151/* values for ZBC_OUT */
152#define ZO_CLOSE_ZONE 0x01
153#define ZO_FINISH_ZONE 0x02
154#define ZO_OPEN_ZONE 0x03
155#define ZO_RESET_WRITE_POINTER 0x04
156/* values for PR in service action */
157#define READ_KEYS 0x00
158#define READ_RESERVATION 0x01
159#define REPORT_CAPABILITES 0x02
160#define READ_FULL_STATUS 0x03
161/* values for variable length command */
162#define XDREAD_32 0x03
163#define XDWRITE_32 0x04
164#define XPWRITE_32 0x06
165#define XDWRITEREAD_32 0x07
166#define READ_32 0x09
167#define VERIFY_32 0x0a
168#define WRITE_32 0x0b
169#define WRITE_VERIFY_32 0x0c
170#define WRITE_SAME_32 0x0d
171#define ATA_32 0x1ff0
172
173/* Values for T10/04-262r7 */
174#define ATA_16 0x85 /* 16-byte pass-thru */
175#define ATA_12 0xa1 /* 12-byte pass-thru */
176
177/* Vendor specific CDBs start here */
178#define VENDOR_SPECIFIC_CDB 0xc0
179
180/*
181 * SCSI command lengths
182 */
183
184#define SCSI_MAX_VARLEN_CDB_SIZE 260
185
186/* defined in T10 SCSI Primary Commands-2 (SPC2) */
187struct scsi_varlen_cdb_hdr {
188 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */
189 __u8 control;
190 __u8 misc[5];
191 __u8 additional_cdb_length; /* total cdb length - 8 */
192 __be16 service_action;
193 /* service specific data follows */
194};
195
196/*
197 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
198 * T10/1561-D Revision 4 Draft dated 7th November 2002.
199 */
200enum sam_status {
201 SAM_STAT_GOOD = 0x00,
202 SAM_STAT_CHECK_CONDITION = 0x02,
203 SAM_STAT_CONDITION_MET = 0x04,
204 SAM_STAT_BUSY = 0x08,
205 SAM_STAT_INTERMEDIATE = 0x10,
206 SAM_STAT_INTERMEDIATE_CONDITION_MET = 0x14,
207 SAM_STAT_RESERVATION_CONFLICT = 0x18,
208 SAM_STAT_COMMAND_TERMINATED = 0x22, /* obsolete in SAM-3 */
209 SAM_STAT_TASK_SET_FULL = 0x28,
210 SAM_STAT_ACA_ACTIVE = 0x30,
211 SAM_STAT_TASK_ABORTED = 0x40,
212};
213
214#define STATUS_MASK 0xfe
215
216/*
217 * SENSE KEYS
218 */
219#define NO_SENSE 0x00
220#define RECOVERED_ERROR 0x01
221#define NOT_READY 0x02
222#define MEDIUM_ERROR 0x03
223#define HARDWARE_ERROR 0x04
224#define ILLEGAL_REQUEST 0x05
225#define UNIT_ATTENTION 0x06
226#define DATA_PROTECT 0x07
227#define BLANK_CHECK 0x08
228#define VENDOR_SPECIFIC 0x09
229#define COPY_ABORTED 0x0a
230#define ABORTED_COMMAND 0x0b
231#define VOLUME_OVERFLOW 0x0d
232#define MISCOMPARE 0x0e
233#define COMPLETED 0x0f
234
235/*
236 * DEVICE TYPES
237 * Please keep them in 0x%02x format for $MODALIAS to work
238 */
239
240#define TYPE_DISK 0x00
241#define TYPE_TAPE 0x01
242#define TYPE_PRINTER 0x02
243#define TYPE_PROCESSOR 0x03 /* HP scanners use this */
244#define TYPE_WORM 0x04 /* Treated as ROM by our system */
245#define TYPE_ROM 0x05
246#define TYPE_SCANNER 0x06
247#define TYPE_MOD 0x07 /* Magneto-optical disk -
248 * - treated as TYPE_DISK */
249#define TYPE_MEDIUM_CHANGER 0x08
250#define TYPE_COMM 0x09 /* Communications device */
251#define TYPE_RAID 0x0c
252#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
253#define TYPE_RBC 0x0e
254#define TYPE_OSD 0x11
255#define TYPE_ZBC 0x14
256#define TYPE_WLUN 0x1e /* well-known logical unit */
257#define TYPE_NO_LUN 0x7f
258
259/* SCSI protocols; these are taken from SPC-3 section 7.5 */
260enum scsi_protocol {
261 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
262 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
263 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
264 SCSI_PROTOCOL_SBP = 3, /* firewire */
265 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
266 SCSI_PROTOCOL_ISCSI = 5,
267 SCSI_PROTOCOL_SAS = 6,
268 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
269 SCSI_PROTOCOL_ATA = 8,
270 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
271};
272
273/*
274 * ScsiLun: 8 byte LUN.
275 */
276struct scsi_lun {
277 __u8 scsi_lun[8];
278};
279
280/* SBC-5 IO advice hints group descriptor */
281struct scsi_io_group_descriptor {
282#if defined(__BIG_ENDIAN)
283 u8 io_advice_hints_mode: 2;
284 u8 reserved1: 3;
285 u8 st_enble: 1;
286 u8 cs_enble: 1;
287 u8 ic_enable: 1;
288#elif defined(__LITTLE_ENDIAN)
289 u8 ic_enable: 1;
290 u8 cs_enble: 1;
291 u8 st_enble: 1;
292 u8 reserved1: 3;
293 u8 io_advice_hints_mode: 2;
294#else
295#error
296#endif
297 u8 reserved2[3];
298 /* Logical block markup descriptor */
299#if defined(__BIG_ENDIAN)
300 u8 acdlu: 1;
301 u8 reserved3: 1;
302 u8 rlbsr: 2;
303 u8 lbm_descriptor_type: 4;
304#elif defined(__LITTLE_ENDIAN)
305 u8 lbm_descriptor_type: 4;
306 u8 rlbsr: 2;
307 u8 reserved3: 1;
308 u8 acdlu: 1;
309#else
310#error
311#endif
312 u8 params[2];
313 u8 reserved4;
314 u8 reserved5[8];
315};
316
317static_assert(sizeof(struct scsi_io_group_descriptor) == 16);
318
319/* SCSI stream status descriptor */
320struct scsi_stream_status {
321#if defined(__BIG_ENDIAN)
322 u8 perm: 1;
323 u8 reserved1: 7;
324#elif defined(__LITTLE_ENDIAN)
325 u8 reserved1: 7;
326 u8 perm: 1;
327#else
328#error
329#endif
330 u8 reserved2;
331 __be16 stream_identifier;
332#if defined(__BIG_ENDIAN)
333 u8 reserved3: 2;
334 u8 rel_lifetime: 6;
335#elif defined(__LITTLE_ENDIAN)
336 u8 rel_lifetime: 6;
337 u8 reserved3: 2;
338#else
339#error
340#endif
341 u8 reserved4[3];
342};
343
344static_assert(sizeof(struct scsi_stream_status) == 8);
345
346/* GET STREAM STATUS parameter data */
347struct scsi_stream_status_header {
348 __be32 len; /* length in bytes of stream_status[] array. */
349 u16 reserved;
350 __be16 number_of_open_streams;
351 DECLARE_FLEX_ARRAY(struct scsi_stream_status, stream_status);
352};
353
354static_assert(sizeof(struct scsi_stream_status_header) == 8);
355
356/* SPC asymmetric access states */
357#define SCSI_ACCESS_STATE_OPTIMAL 0x00
358#define SCSI_ACCESS_STATE_ACTIVE 0x01
359#define SCSI_ACCESS_STATE_STANDBY 0x02
360#define SCSI_ACCESS_STATE_UNAVAILABLE 0x03
361#define SCSI_ACCESS_STATE_LBA 0x04
362#define SCSI_ACCESS_STATE_OFFLINE 0x0e
363#define SCSI_ACCESS_STATE_TRANSITIONING 0x0f
364
365/* Values for REPORT TARGET GROUP STATES */
366#define SCSI_ACCESS_STATE_MASK 0x0f
367#define SCSI_ACCESS_STATE_PREFERRED 0x80
368
369/* Reporting options for REPORT ZONES */
370enum zbc_zone_reporting_options {
371 ZBC_ZONE_REPORTING_OPTION_ALL = 0x00,
372 ZBC_ZONE_REPORTING_OPTION_EMPTY = 0x01,
373 ZBC_ZONE_REPORTING_OPTION_IMPLICIT_OPEN = 0x02,
374 ZBC_ZONE_REPORTING_OPTION_EXPLICIT_OPEN = 0x03,
375 ZBC_ZONE_REPORTING_OPTION_CLOSED = 0x04,
376 ZBC_ZONE_REPORTING_OPTION_FULL = 0x05,
377 ZBC_ZONE_REPORTING_OPTION_READONLY = 0x06,
378 ZBC_ZONE_REPORTING_OPTION_OFFLINE = 0x07,
379 /* 0x08 to 0x0f are reserved */
380 ZBC_ZONE_REPORTING_OPTION_NEED_RESET_WP = 0x10,
381 ZBC_ZONE_REPORTING_OPTION_NON_SEQWRITE = 0x11,
382 /* 0x12 to 0x3e are reserved */
383 ZBC_ZONE_REPORTING_OPTION_NON_WP = 0x3f,
384};
385
386#define ZBC_REPORT_ZONE_PARTIAL 0x80
387
388/* Zone types of REPORT ZONES zone descriptors */
389enum zbc_zone_type {
390 ZBC_ZONE_TYPE_CONV = 0x1,
391 ZBC_ZONE_TYPE_SEQWRITE_REQ = 0x2,
392 ZBC_ZONE_TYPE_SEQWRITE_PREF = 0x3,
393 ZBC_ZONE_TYPE_SEQ_OR_BEFORE_REQ = 0x4,
394 ZBC_ZONE_TYPE_GAP = 0x5,
395 /* 0x6 to 0xf are reserved */
396};
397
398/* Zone conditions of REPORT ZONES zone descriptors */
399enum zbc_zone_cond {
400 ZBC_ZONE_COND_NO_WP = 0x0,
401 ZBC_ZONE_COND_EMPTY = 0x1,
402 ZBC_ZONE_COND_IMP_OPEN = 0x2,
403 ZBC_ZONE_COND_EXP_OPEN = 0x3,
404 ZBC_ZONE_COND_CLOSED = 0x4,
405 /* 0x5 to 0xc are reserved */
406 ZBC_ZONE_COND_READONLY = 0xd,
407 ZBC_ZONE_COND_FULL = 0xe,
408 ZBC_ZONE_COND_OFFLINE = 0xf,
409};
410
411enum zbc_zone_alignment_method {
412 ZBC_CONSTANT_ZONE_LENGTH = 0x1,
413 ZBC_CONSTANT_ZONE_START_OFFSET = 0x8,
414};
415
416/* Version descriptor values for INQUIRY */
417enum scsi_version_descriptor {
418 SCSI_VERSION_DESCRIPTOR_FCP4 = 0x0a40,
419 SCSI_VERSION_DESCRIPTOR_ISCSI = 0x0960,
420 SCSI_VERSION_DESCRIPTOR_SAM5 = 0x00a0,
421 SCSI_VERSION_DESCRIPTOR_SAS3 = 0x0c60,
422 SCSI_VERSION_DESCRIPTOR_SBC3 = 0x04c0,
423 SCSI_VERSION_DESCRIPTOR_SBP3 = 0x0980,
424 SCSI_VERSION_DESCRIPTOR_SPC4 = 0x0460,
425 SCSI_VERSION_DESCRIPTOR_SRP = 0x0940
426};
427
428enum scsi_support_opcode {
429 SCSI_SUPPORT_NO_INFO = 0,
430 SCSI_SUPPORT_NOT_SUPPORTED = 1,
431 SCSI_SUPPORT_FULL = 3,
432 SCSI_SUPPORT_VENDOR = 5,
433};
434
435#define SCSI_CONTROL_MASK 0
436#define SCSI_GROUP_NUMBER_MASK 0
437
438#endif /* _SCSI_PROTO_H_ */