]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - drivers/nvme/host/scsi.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'hughd-fixes' (patches from Hugh Dickins)
[mirror_ubuntu-zesty-kernel.git] / drivers / nvme / host / scsi.c
CommitLineData
5d0f6131
VV		 1/*
2 * NVM Express device driver
8757ad65 3 * Copyright (c) 2011-2014, Intel Corporation.
5d0f6131
VV		 4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
5d0f6131
VV		 13 */
14
15/*
16 * Refer to the SCSI-NVMe Translation spec for details on how
17 * each command is translated.
18 */
19
5d0f6131
VV		 20#include <linux/bio.h>
21#include <linux/bitops.h>
22#include <linux/blkdev.h>
320a3827 23#include <linux/compat.h>
5d0f6131
VV		 24#include <linux/delay.h>
25#include <linux/errno.h>
26#include <linux/fs.h>
27#include <linux/genhd.h>
28#include <linux/idr.h>
29#include <linux/init.h>
30#include <linux/interrupt.h>
31#include <linux/io.h>
32#include <linux/kdev_t.h>
33#include <linux/kthread.h>
34#include <linux/kernel.h>
35#include <linux/mm.h>
36#include <linux/module.h>
37#include <linux/moduleparam.h>
38#include <linux/pci.h>
39#include <linux/poison.h>
40#include <linux/sched.h>
41#include <linux/slab.h>
42#include <linux/types.h>
3726897e 43#include <asm/unaligned.h>
5d0f6131
VV		 44#include <scsi/sg.h>
45#include <scsi/scsi.h>
46
f11bb3e2 47#include "nvme.h"
5d0f6131
VV		 48
49static int sg_version_num = 30534; /* 2 digits for each component */
50
5d0f6131
VV		 51/* VPD Page Codes */
52#define VPD_SUPPORTED_PAGES 0x00
53#define VPD_SERIAL_NUMBER 0x80
54#define VPD_DEVICE_IDENTIFIERS 0x83
55#define VPD_EXTENDED_INQUIRY 0x86
7f749d9c 56#define VPD_BLOCK_LIMITS 0xB0
5d0f6131
VV		 57#define VPD_BLOCK_DEV_CHARACTERISTICS 0xB1
58
3726897e 59/* format unit paramter list offsets */
5d0f6131
VV		 60#define FORMAT_UNIT_SHORT_PARM_LIST_LEN 4
61#define FORMAT_UNIT_LONG_PARM_LIST_LEN 8
62#define FORMAT_UNIT_PROT_INT_OFFSET 3
63#define FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET 0
64#define FORMAT_UNIT_PROT_FIELD_USAGE_MASK 0x07
65
66/* Misc. defines */
5d0f6131
VV		 67#define FIXED_SENSE_DATA 0x70
68#define DESC_FORMAT_SENSE_DATA 0x72
69#define FIXED_SENSE_DATA_ADD_LENGTH 10
70#define LUN_ENTRY_SIZE 8
71#define LUN_DATA_HEADER_SIZE 8
72#define ALL_LUNS_RETURNED 0x02
73#define ALL_WELL_KNOWN_LUNS_RETURNED 0x01
74#define RESTRICTED_LUNS_RETURNED 0x00
75#define NVME_POWER_STATE_START_VALID 0x00
76#define NVME_POWER_STATE_ACTIVE 0x01
77#define NVME_POWER_STATE_IDLE 0x02
78#define NVME_POWER_STATE_STANDBY 0x03
79#define NVME_POWER_STATE_LU_CONTROL 0x07
80#define POWER_STATE_0 0
81#define POWER_STATE_1 1
82#define POWER_STATE_2 2
83#define POWER_STATE_3 3
84#define DOWNLOAD_SAVE_ACTIVATE 0x05
85#define DOWNLOAD_SAVE_DEFER_ACTIVATE 0x0E
86#define ACTIVATE_DEFERRED_MICROCODE 0x0F
87#define FORMAT_UNIT_IMMED_MASK 0x2
88#define FORMAT_UNIT_IMMED_OFFSET 1
89#define KELVIN_TEMP_FACTOR 273
90#define FIXED_FMT_SENSE_DATA_SIZE 18
91#define DESC_FMT_SENSE_DATA_SIZE 8
92
93/* SCSI/NVMe defines and bit masks */
94#define INQ_STANDARD_INQUIRY_PAGE 0x00
95#define INQ_SUPPORTED_VPD_PAGES_PAGE 0x00
96#define INQ_UNIT_SERIAL_NUMBER_PAGE 0x80
97#define INQ_DEVICE_IDENTIFICATION_PAGE 0x83
98#define INQ_EXTENDED_INQUIRY_DATA_PAGE 0x86
7f749d9c 99#define INQ_BDEV_LIMITS_PAGE 0xB0
5d0f6131
VV		 100#define INQ_BDEV_CHARACTERISTICS_PAGE 0xB1
101#define INQ_SERIAL_NUMBER_LENGTH 0x14
7f749d9c 102#define INQ_NUM_SUPPORTED_VPD_PAGES 6
5d0f6131
VV		 103#define VERSION_SPC_4 0x06
104#define ACA_UNSUPPORTED 0
105#define STANDARD_INQUIRY_LENGTH 36
106#define ADDITIONAL_STD_INQ_LENGTH 31
107#define EXTENDED_INQUIRY_DATA_PAGE_LENGTH 0x3C
108#define RESERVED_FIELD 0
109
5d0f6131
VV		 110/* Mode Sense/Select defines */
111#define MODE_PAGE_INFO_EXCEP 0x1C
112#define MODE_PAGE_CACHING 0x08
113#define MODE_PAGE_CONTROL 0x0A
114#define MODE_PAGE_POWER_CONDITION 0x1A
115#define MODE_PAGE_RETURN_ALL 0x3F
116#define MODE_PAGE_BLK_DES_LEN 0x08
117#define MODE_PAGE_LLBAA_BLK_DES_LEN 0x10
118#define MODE_PAGE_CACHING_LEN 0x14
119#define MODE_PAGE_CONTROL_LEN 0x0C
120#define MODE_PAGE_POW_CND_LEN 0x28
121#define MODE_PAGE_INF_EXC_LEN 0x0C
122#define MODE_PAGE_ALL_LEN 0x54
123#define MODE_SENSE6_MPH_SIZE 4
5d0f6131
VV		 124#define MODE_SENSE_PAGE_CONTROL_MASK 0xC0
125#define MODE_SENSE_PAGE_CODE_OFFSET 2
126#define MODE_SENSE_PAGE_CODE_MASK 0x3F
5d0f6131
VV		 127#define MODE_SENSE_LLBAA_MASK 0x10
128#define MODE_SENSE_LLBAA_SHIFT 4
5d0f6131
VV		 129#define MODE_SENSE_DBD_MASK 8
130#define MODE_SENSE_DBD_SHIFT 3
131#define MODE_SENSE10_MPH_SIZE 8
5d0f6131
VV		 132#define MODE_SELECT_CDB_PAGE_FORMAT_MASK 0x10
133#define MODE_SELECT_CDB_SAVE_PAGES_MASK 0x1
134#define MODE_SELECT_6_BD_OFFSET 3
135#define MODE_SELECT_10_BD_OFFSET 6
136#define MODE_SELECT_10_LLBAA_OFFSET 4
137#define MODE_SELECT_10_LLBAA_MASK 1
138#define MODE_SELECT_6_MPH_SIZE 4
139#define MODE_SELECT_10_MPH_SIZE 8
140#define CACHING_MODE_PAGE_WCE_MASK 0x04
141#define MODE_SENSE_BLK_DESC_ENABLED 0
142#define MODE_SENSE_BLK_DESC_COUNT 1
143#define MODE_SELECT_PAGE_CODE_MASK 0x3F
144#define SHORT_DESC_BLOCK 8
145#define LONG_DESC_BLOCK 16
146#define MODE_PAGE_POW_CND_LEN_FIELD 0x26
147#define MODE_PAGE_INF_EXC_LEN_FIELD 0x0A
148#define MODE_PAGE_CACHING_LEN_FIELD 0x12
149#define MODE_PAGE_CONTROL_LEN_FIELD 0x0A
150#define MODE_SENSE_PC_CURRENT_VALUES 0
151
152/* Log Sense defines */
153#define LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE 0x00
154#define LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH 0x07
155#define LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE 0x2F
156#define LOG_PAGE_TEMPERATURE_PAGE 0x0D
5d0f6131 157#define LOG_SENSE_CDB_SP_NOT_ENABLED 0
5d0f6131
VV		 158#define LOG_SENSE_CDB_PC_MASK 0xC0
159#define LOG_SENSE_CDB_PC_SHIFT 6
160#define LOG_SENSE_CDB_PC_CUMULATIVE_VALUES 1
161#define LOG_SENSE_CDB_PAGE_CODE_MASK 0x3F
5d0f6131
VV		 162#define REMAINING_INFO_EXCP_PAGE_LENGTH 0x8
163#define LOG_INFO_EXCP_PAGE_LENGTH 0xC
164#define REMAINING_TEMP_PAGE_LENGTH 0xC
165#define LOG_TEMP_PAGE_LENGTH 0x10
166#define LOG_TEMP_UNKNOWN 0xFF
167#define SUPPORTED_LOG_PAGES_PAGE_LENGTH 0x3
168
169/* Read Capacity defines */
170#define READ_CAP_10_RESP_SIZE 8
171#define READ_CAP_16_RESP_SIZE 32
172
173/* NVMe Namespace and Command Defines */
5d0f6131
VV		 174#define BYTES_TO_DWORDS 4
175#define NVME_MAX_FIRMWARE_SLOT 7
176
177/* Report LUNs defines */
178#define REPORT_LUNS_FIRST_LUN_OFFSET 8
179
180/* SCSI ADDITIONAL SENSE Codes */
181
182#define SCSI_ASC_NO_SENSE 0x00
183#define SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT 0x03
184#define SCSI_ASC_LUN_NOT_READY 0x04
185#define SCSI_ASC_WARNING 0x0B
186#define SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED 0x10
187#define SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED 0x10
188#define SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED 0x10
189#define SCSI_ASC_UNRECOVERED_READ_ERROR 0x11
190#define SCSI_ASC_MISCOMPARE_DURING_VERIFY 0x1D
191#define SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID 0x20
192#define SCSI_ASC_ILLEGAL_COMMAND 0x20
193#define SCSI_ASC_ILLEGAL_BLOCK 0x21
194#define SCSI_ASC_INVALID_CDB 0x24
195#define SCSI_ASC_INVALID_LUN 0x25
196#define SCSI_ASC_INVALID_PARAMETER 0x26
197#define SCSI_ASC_FORMAT_COMMAND_FAILED 0x31
198#define SCSI_ASC_INTERNAL_TARGET_FAILURE 0x44
199
200/* SCSI ADDITIONAL SENSE Code Qualifiers */
201
202#define SCSI_ASCQ_CAUSE_NOT_REPORTABLE 0x00
203#define SCSI_ASCQ_FORMAT_COMMAND_FAILED 0x01
204#define SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED 0x01
205#define SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED 0x02
206#define SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED 0x03
207#define SCSI_ASCQ_FORMAT_IN_PROGRESS 0x04
208#define SCSI_ASCQ_POWER_LOSS_EXPECTED 0x08
209#define SCSI_ASCQ_INVALID_LUN_ID 0x09
210
3726897e
CH		 211/* copied from drivers/usb/gadget/function/storage_common.h */
212static inline u32 get_unaligned_be24(u8 *buf)
213{
214 return 0xffffff & (u32) get_unaligned_be32(buf - 1);
215}
5d0f6131
VV		 216
217/* Struct to gather data that needs to be extracted from a SCSI CDB.
218 Not conforming to any particular CDB variant, but compatible with all. */
219
220struct nvme_trans_io_cdb {
221 u8 fua;
222 u8 prot_info;
223 u64 lba;
224 u32 xfer_len;
225};
226
227
228/* Internal Helper Functions */
229
230
231/* Copy data to userspace memory */
232
233static int nvme_trans_copy_to_user(struct sg_io_hdr *hdr, void *from,
234 unsigned long n)
235{
5d0f6131
VV		 236 int i;
237 void *index = from;
238 size_t remaining = n;
239 size_t xfer_len;
240
241 if (hdr->iovec_count > 0) {
8741ee4c 242 struct sg_iovec sgl;
5d0f6131
VV		 243
244 for (i = 0; i < hdr->iovec_count; i++) {
e61b0a86 245 if (copy_from_user(&sgl, hdr->dxferp +
8741ee4c 246 i * sizeof(struct sg_iovec),
e61b0a86 247 sizeof(struct sg_iovec)))
8741ee4c
VV		 248 return -EFAULT;
249 xfer_len = min(remaining, sgl.iov_len);
e61b0a86
CH		 250 if (copy_to_user(sgl.iov_base, index, xfer_len))
251 return -EFAULT;
252
5d0f6131
VV		 253 index += xfer_len;
254 remaining -= xfer_len;
255 if (remaining == 0)
256 break;
257 }
e61b0a86 258 return 0;
5d0f6131 259 }
e61b0a86
CH		 260
261 if (copy_to_user(hdr->dxferp, from, n))
262 return -EFAULT;
263 return 0;
5d0f6131
VV		 264}
265
266/* Copy data from userspace memory */
267
268static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,
269 unsigned long n)
270{
5d0f6131
VV		 271 int i;
272 void *index = to;
273 size_t remaining = n;
274 size_t xfer_len;
275
276 if (hdr->iovec_count > 0) {
8741ee4c 277 struct sg_iovec sgl;
5d0f6131
VV		 278
279 for (i = 0; i < hdr->iovec_count; i++) {
e61b0a86 280 if (copy_from_user(&sgl, hdr->dxferp +
8741ee4c 281 i * sizeof(struct sg_iovec),
e61b0a86 282 sizeof(struct sg_iovec)))
8741ee4c
VV		 283 return -EFAULT;
284 xfer_len = min(remaining, sgl.iov_len);
e61b0a86
CH		 285 if (copy_from_user(index, sgl.iov_base, xfer_len))
286 return -EFAULT;
5d0f6131
VV		 287 index += xfer_len;
288 remaining -= xfer_len;
289 if (remaining == 0)
290 break;
291 }
e61b0a86 292 return 0;
5d0f6131
VV		 293 }
294
e61b0a86
CH		 295 if (copy_from_user(to, hdr->dxferp, n))
296 return -EFAULT;
297 return 0;
5d0f6131
VV		 298}
299
300/* Status/Sense Buffer Writeback */
301
302static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,
303 u8 asc, u8 ascq)
304{
5d0f6131
VV		 305 u8 xfer_len;
306 u8 resp[DESC_FMT_SENSE_DATA_SIZE];
307
308 if (scsi_status_is_good(status)) {
309 hdr->status = SAM_STAT_GOOD;
310 hdr->masked_status = GOOD;
311 hdr->host_status = DID_OK;
312 hdr->driver_status = DRIVER_OK;
313 hdr->sb_len_wr = 0;
314 } else {
315 hdr->status = status;
316 hdr->masked_status = status >> 1;
317 hdr->host_status = DID_OK;
318 hdr->driver_status = DRIVER_OK;
319
320 memset(resp, 0, DESC_FMT_SENSE_DATA_SIZE);
321 resp[0] = DESC_FORMAT_SENSE_DATA;
322 resp[1] = sense_key;
323 resp[2] = asc;
324 resp[3] = ascq;
325
326 xfer_len = min_t(u8, hdr->mx_sb_len, DESC_FMT_SENSE_DATA_SIZE);
327 hdr->sb_len_wr = xfer_len;
8741ee4c 328 if (copy_to_user(hdr->sbp, resp, xfer_len) > 0)
e61b0a86 329 return -EFAULT;
5d0f6131
VV		 330 }
331
e61b0a86 332 return 0;
5d0f6131
VV		 333}
334
e61b0a86
CH		 335/*
336 * Take a status code from a lowlevel routine, and if it was a positive NVMe
337 * error code update the sense data based on it. In either case the passed
338 * in value is returned again, unless an -EFAULT from copy_to_user overrides
339 * it.
340 */
5d0f6131
VV		 341static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)
342{
343 u8 status, sense_key, asc, ascq;
e61b0a86 344 int res;
5d0f6131
VV		 345
346 /* For non-nvme (Linux) errors, simply return the error code */
347 if (nvme_sc < 0)
348 return nvme_sc;
349
350 /* Mask DNR, More, and reserved fields */
e61b0a86 351 switch (nvme_sc & 0x7FF) {
5d0f6131
VV		 352 /* Generic Command Status */
353 case NVME_SC_SUCCESS:
354 status = SAM_STAT_GOOD;
355 sense_key = NO_SENSE;
356 asc = SCSI_ASC_NO_SENSE;
357 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
358 break;
359 case NVME_SC_INVALID_OPCODE:
360 status = SAM_STAT_CHECK_CONDITION;
361 sense_key = ILLEGAL_REQUEST;
362 asc = SCSI_ASC_ILLEGAL_COMMAND;
363 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
364 break;
365 case NVME_SC_INVALID_FIELD:
366 status = SAM_STAT_CHECK_CONDITION;
367 sense_key = ILLEGAL_REQUEST;
368 asc = SCSI_ASC_INVALID_CDB;
369 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
370 break;
371 case NVME_SC_DATA_XFER_ERROR:
372 status = SAM_STAT_CHECK_CONDITION;
373 sense_key = MEDIUM_ERROR;
374 asc = SCSI_ASC_NO_SENSE;
375 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
376 break;
377 case NVME_SC_POWER_LOSS:
378 status = SAM_STAT_TASK_ABORTED;
379 sense_key = ABORTED_COMMAND;
380 asc = SCSI_ASC_WARNING;
381 ascq = SCSI_ASCQ_POWER_LOSS_EXPECTED;
382 break;
383 case NVME_SC_INTERNAL:
384 status = SAM_STAT_CHECK_CONDITION;
385 sense_key = HARDWARE_ERROR;
386 asc = SCSI_ASC_INTERNAL_TARGET_FAILURE;
387 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
388 break;
389 case NVME_SC_ABORT_REQ:
390 status = SAM_STAT_TASK_ABORTED;
391 sense_key = ABORTED_COMMAND;
392 asc = SCSI_ASC_NO_SENSE;
393 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
394 break;
395 case NVME_SC_ABORT_QUEUE:
396 status = SAM_STAT_TASK_ABORTED;
397 sense_key = ABORTED_COMMAND;
398 asc = SCSI_ASC_NO_SENSE;
399 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
400 break;
401 case NVME_SC_FUSED_FAIL:
402 status = SAM_STAT_TASK_ABORTED;
403 sense_key = ABORTED_COMMAND;
404 asc = SCSI_ASC_NO_SENSE;
405 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
406 break;
407 case NVME_SC_FUSED_MISSING:
408 status = SAM_STAT_TASK_ABORTED;
409 sense_key = ABORTED_COMMAND;
410 asc = SCSI_ASC_NO_SENSE;
411 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
412 break;
413 case NVME_SC_INVALID_NS:
414 status = SAM_STAT_CHECK_CONDITION;
415 sense_key = ILLEGAL_REQUEST;
416 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
417 ascq = SCSI_ASCQ_INVALID_LUN_ID;
418 break;
419 case NVME_SC_LBA_RANGE:
420 status = SAM_STAT_CHECK_CONDITION;
421 sense_key = ILLEGAL_REQUEST;
422 asc = SCSI_ASC_ILLEGAL_BLOCK;
423 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
424 break;
425 case NVME_SC_CAP_EXCEEDED:
426 status = SAM_STAT_CHECK_CONDITION;
427 sense_key = MEDIUM_ERROR;
428 asc = SCSI_ASC_NO_SENSE;
429 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
430 break;
431 case NVME_SC_NS_NOT_READY:
432 status = SAM_STAT_CHECK_CONDITION;
433 sense_key = NOT_READY;
434 asc = SCSI_ASC_LUN_NOT_READY;
435 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
436 break;
437
438 /* Command Specific Status */
439 case NVME_SC_INVALID_FORMAT:
440 status = SAM_STAT_CHECK_CONDITION;
441 sense_key = ILLEGAL_REQUEST;
442 asc = SCSI_ASC_FORMAT_COMMAND_FAILED;
443 ascq = SCSI_ASCQ_FORMAT_COMMAND_FAILED;
444 break;
445 case NVME_SC_BAD_ATTRIBUTES:
446 status = SAM_STAT_CHECK_CONDITION;
447 sense_key = ILLEGAL_REQUEST;
448 asc = SCSI_ASC_INVALID_CDB;
449 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
450 break;
451
452 /* Media Errors */
453 case NVME_SC_WRITE_FAULT:
454 status = SAM_STAT_CHECK_CONDITION;
455 sense_key = MEDIUM_ERROR;
456 asc = SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT;
457 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
458 break;
459 case NVME_SC_READ_ERROR:
460 status = SAM_STAT_CHECK_CONDITION;
461 sense_key = MEDIUM_ERROR;
462 asc = SCSI_ASC_UNRECOVERED_READ_ERROR;
463 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
464 break;
465 case NVME_SC_GUARD_CHECK:
466 status = SAM_STAT_CHECK_CONDITION;
467 sense_key = MEDIUM_ERROR;
468 asc = SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED;
469 ascq = SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED;
470 break;
471 case NVME_SC_APPTAG_CHECK:
472 status = SAM_STAT_CHECK_CONDITION;
473 sense_key = MEDIUM_ERROR;
474 asc = SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED;
475 ascq = SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED;
476 break;
477 case NVME_SC_REFTAG_CHECK:
478 status = SAM_STAT_CHECK_CONDITION;
479 sense_key = MEDIUM_ERROR;
480 asc = SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED;
481 ascq = SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED;
482 break;
483 case NVME_SC_COMPARE_FAILED:
484 status = SAM_STAT_CHECK_CONDITION;
485 sense_key = MISCOMPARE;
486 asc = SCSI_ASC_MISCOMPARE_DURING_VERIFY;
487 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
488 break;
489 case NVME_SC_ACCESS_DENIED:
490 status = SAM_STAT_CHECK_CONDITION;
491 sense_key = ILLEGAL_REQUEST;
492 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
493 ascq = SCSI_ASCQ_INVALID_LUN_ID;
494 break;
495
496 /* Unspecified/Default */
497 case NVME_SC_CMDID_CONFLICT:
498 case NVME_SC_CMD_SEQ_ERROR:
499 case NVME_SC_CQ_INVALID:
500 case NVME_SC_QID_INVALID:
501 case NVME_SC_QUEUE_SIZE:
502 case NVME_SC_ABORT_LIMIT:
503 case NVME_SC_ABORT_MISSING:
504 case NVME_SC_ASYNC_LIMIT:
505 case NVME_SC_FIRMWARE_SLOT:
506 case NVME_SC_FIRMWARE_IMAGE:
507 case NVME_SC_INVALID_VECTOR:
508 case NVME_SC_INVALID_LOG_PAGE:
509 default:
510 status = SAM_STAT_CHECK_CONDITION;
511 sense_key = ILLEGAL_REQUEST;
512 asc = SCSI_ASC_NO_SENSE;
513 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
514 break;
515 }
516
517 res = nvme_trans_completion(hdr, status, sense_key, asc, ascq);
e61b0a86 518 return res ? res : nvme_sc;
5d0f6131
VV		 519}
520
521/* INQUIRY Helper Functions */
522
523static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
524 struct sg_io_hdr *hdr, u8 *inq_response,
525 int alloc_len)
526{
1c63dc66 527 struct nvme_ctrl *ctrl = ns->ctrl;
5d0f6131 528 struct nvme_id_ns *id_ns;
e61b0a86 529 int res;
5d0f6131
VV		 530 int nvme_sc;
531 int xfer_len;
532 u8 resp_data_format = 0x02;
533 u8 protect;
534 u8 cmdque = 0x01 << 1;
1c63dc66 535 u8 fw_offset = sizeof(ctrl->firmware_rev);
5d0f6131 536
5d0f6131 537 /* nvme ns identify - use DPS value for PROTECT field */
1c63dc66 538 nvme_sc = nvme_identify_ns(ctrl, ns->ns_id, &id_ns);
5d0f6131 539 res = nvme_trans_status_code(hdr, nvme_sc);
5d0f6131 540 if (res)
d29ec824 541 return res;
e61b0a86 542
d29ec824
CH		 543 if (id_ns->dps)
544 protect = 0x01;
545 else
546 protect = 0;
547 kfree(id_ns);
5d0f6131
VV		 548
549 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
550 inq_response[2] = VERSION_SPC_4;
551 inq_response[3] = resp_data_format; /*normaca=0 | hisup=0 */
552 inq_response[4] = ADDITIONAL_STD_INQ_LENGTH;
553 inq_response[5] = protect; /* sccs=0 | acc=0 | tpgs=0 | pc3=0 */
554 inq_response[7] = cmdque; /* wbus16=0 | sync=0 | vs=0 */
555 strncpy(&inq_response[8], "NVMe ", 8);
1c63dc66 556 strncpy(&inq_response[16], ctrl->model, 16);
dedf4b15 557
1c63dc66 558 while (ctrl->firmware_rev[fw_offset - 1] == ' ' && fw_offset > 4)
dedf4b15
KB		 559 fw_offset--;
560 fw_offset -= 4;
1c63dc66 561 strncpy(&inq_response[32], ctrl->firmware_rev + fw_offset, 4);
5d0f6131
VV		 562
563 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
d29ec824 564 return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
5d0f6131
VV		 565}
566
567static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
568 struct sg_io_hdr *hdr, u8 *inq_response,
569 int alloc_len)
570{
5d0f6131
VV		 571 int xfer_len;
572
573 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
574 inq_response[1] = INQ_SUPPORTED_VPD_PAGES_PAGE; /* Page Code */
575 inq_response[3] = INQ_NUM_SUPPORTED_VPD_PAGES; /* Page Length */
576 inq_response[4] = INQ_SUPPORTED_VPD_PAGES_PAGE;
577 inq_response[5] = INQ_UNIT_SERIAL_NUMBER_PAGE;
578 inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
579 inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
580 inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
7f749d9c 581 inq_response[9] = INQ_BDEV_LIMITS_PAGE;
5d0f6131
VV		 582
583 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
e61b0a86 584 return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
5d0f6131
VV		 585}
586
587static int nvme_trans_unit_serial_page(struct nvme_ns *ns,
588 struct sg_io_hdr *hdr, u8 *inq_response,
589 int alloc_len)
590{
5d0f6131
VV		 591 int xfer_len;
592
593 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
594 inq_response[1] = INQ_UNIT_SERIAL_NUMBER_PAGE; /* Page Code */
595 inq_response[3] = INQ_SERIAL_NUMBER_LENGTH; /* Page Length */
1c63dc66 596 strncpy(&inq_response[4], ns->ctrl->serial, INQ_SERIAL_NUMBER_LENGTH);
5d0f6131
VV		 597
598 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
e61b0a86 599 return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
5d0f6131
VV		 600}
601
bf7d3ebb 602static int nvme_fill_device_id_eui64(struct nvme_ns *ns, struct sg_io_hdr *hdr,
f3ca80fc 603 u8 *inq_response, int alloc_len)
5d0f6131 604{
bf7d3ebb
CH		 605 struct nvme_id_ns *id_ns;
606 int nvme_sc, res;
607 size_t len;
608 void *eui;
5d0f6131 609
1c63dc66 610 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
bf7d3ebb
CH		 611 res = nvme_trans_status_code(hdr, nvme_sc);
612 if (res)
613 return res;
4f1982b4 614
bf7d3ebb
CH		 615 eui = id_ns->eui64;
616 len = sizeof(id_ns->eui64);
617
f3ca80fc 618 if (ns->ctrl->vs >= NVME_VS(1, 2)) {
d29ec824 619 if (bitmap_empty(eui, len * 8)) {
bf7d3ebb
CH		 620 eui = id_ns->nguid;
621 len = sizeof(id_ns->nguid);
d29ec824 622 }
bf7d3ebb 623 }
4f1982b4 624
bf7d3ebb
CH		 625 if (bitmap_empty(eui, len * 8)) {
626 res = -EOPNOTSUPP;
627 goto out_free_id;
4f1982b4 628 }
bf7d3ebb
CH		 629
630 memset(inq_response, 0, alloc_len);
631 inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE;
632 inq_response[3] = 4 + len; /* Page Length */
633
634 /* Designation Descriptor start */
635 inq_response[4] = 0x01; /* Proto ID=0h | Code set=1h */
636 inq_response[5] = 0x02; /* PIV=0b | Asso=00b | Designator Type=2h */
637 inq_response[6] = 0x00; /* Rsvd */
638 inq_response[7] = len; /* Designator Length */
639 memcpy(&inq_response[8], eui, len);
640
641 res = nvme_trans_copy_to_user(hdr, inq_response, alloc_len);
642out_free_id:
643 kfree(id_ns);
644 return res;
645}
646
647static int nvme_fill_device_id_scsi_string(struct nvme_ns *ns,
648 struct sg_io_hdr *hdr, u8 *inq_response, int alloc_len)
649{
1c63dc66 650 struct nvme_ctrl *ctrl = ns->ctrl;
01fec28a
CH		 651 struct nvme_id_ctrl *id_ctrl;
652 int nvme_sc, res;
bf7d3ebb
CH		 653
654 if (alloc_len < 72) {
655 return nvme_trans_completion(hdr,
656 SAM_STAT_CHECK_CONDITION,
657 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
658 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
659 }
660
1c63dc66 661 nvme_sc = nvme_identify_ctrl(ctrl, &id_ctrl);
01fec28a
CH		 662 res = nvme_trans_status_code(hdr, nvme_sc);
663 if (res)
664 return res;
665
bf7d3ebb
CH		 666 memset(inq_response, 0, alloc_len);
667 inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE;
668 inq_response[3] = 0x48; /* Page Length */
669
670 /* Designation Descriptor start */
671 inq_response[4] = 0x03; /* Proto ID=0h | Code set=3h */
672 inq_response[5] = 0x08; /* PIV=0b | Asso=00b | Designator Type=8h */
673 inq_response[6] = 0x00; /* Rsvd */
674 inq_response[7] = 0x44; /* Designator Length */
675
01fec28a 676 sprintf(&inq_response[8], "%04x", le16_to_cpu(id_ctrl->vid));
1c63dc66 677 memcpy(&inq_response[12], ctrl->model, sizeof(ctrl->model));
bf7d3ebb 678 sprintf(&inq_response[52], "%04x", cpu_to_be32(ns->ns_id));
1c63dc66 679 memcpy(&inq_response[56], ctrl->serial, sizeof(ctrl->serial));
bf7d3ebb 680
01fec28a
CH		 681 res = nvme_trans_copy_to_user(hdr, inq_response, alloc_len);
682 kfree(id_ctrl);
683 return res;
bf7d3ebb
CH		 684}
685
686static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
687 u8 *resp, int alloc_len)
688{
689 int res;
690
f3ca80fc
CH		 691 if (ns->ctrl->vs >= NVME_VS(1, 1)) {
692 res = nvme_fill_device_id_eui64(ns, hdr, resp, alloc_len);
bf7d3ebb
CH		 693 if (res != -EOPNOTSUPP)
694 return res;
695 }
696
697 return nvme_fill_device_id_scsi_string(ns, hdr, resp, alloc_len);
5d0f6131
VV		 698}
699
700static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
701 int alloc_len)
702{
703 u8 *inq_response;
e61b0a86 704 int res;
5d0f6131 705 int nvme_sc;
1c63dc66 706 struct nvme_ctrl *ctrl = ns->ctrl;
5d0f6131
VV		 707 struct nvme_id_ctrl *id_ctrl;
708 struct nvme_id_ns *id_ns;
709 int xfer_len;
710 u8 microcode = 0x80;
711 u8 spt;
712 u8 spt_lut[8] = {0, 0, 2, 1, 4, 6, 5, 7};
713 u8 grd_chk, app_chk, ref_chk, protect;
714 u8 uask_sup = 0x20;
715 u8 v_sup;
716 u8 luiclr = 0x01;
717
718 inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 719 if (inq_response == NULL)
720 return -ENOMEM;
5d0f6131 721
1c63dc66 722 nvme_sc = nvme_identify_ns(ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 723 res = nvme_trans_status_code(hdr, nvme_sc);
724 if (res)
d29ec824
CH		 725 goto out_free_inq;
726
727 spt = spt_lut[id_ns->dpc & 0x07] << 3;
728 if (id_ns->dps)
729 protect = 0x01;
730 else
731 protect = 0;
732 kfree(id_ns);
e61b0a86 733
5d0f6131
VV		 734 grd_chk = protect << 2;
735 app_chk = protect << 1;
736 ref_chk = protect;
737
1c63dc66 738 nvme_sc = nvme_identify_ctrl(ctrl, &id_ctrl);
5d0f6131
VV		 739 res = nvme_trans_status_code(hdr, nvme_sc);
740 if (res)
d29ec824 741 goto out_free_inq;
e61b0a86 742
5d0f6131 743 v_sup = id_ctrl->vwc;
d29ec824 744 kfree(id_ctrl);
5d0f6131
VV		 745
746 memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
747 inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE; /* Page Code */
748 inq_response[2] = 0x00; /* Page Length MSB */
749 inq_response[3] = 0x3C; /* Page Length LSB */
750 inq_response[4] = microcode | spt | grd_chk | app_chk | ref_chk;
751 inq_response[5] = uask_sup;
752 inq_response[6] = v_sup;
753 inq_response[7] = luiclr;
754 inq_response[8] = 0;
755 inq_response[9] = 0;
756
757 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
758 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
759
d29ec824 760 out_free_inq:
5d0f6131 761 kfree(inq_response);
5d0f6131
VV		 762 return res;
763}
764
7f749d9c
KB		 765static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
766 u8 *inq_response, int alloc_len)
767{
9283b42e
KB		 768 __be32 max_sectors = cpu_to_be32(
769 nvme_block_nr(ns, queue_max_hw_sectors(ns->queue)));
7f749d9c
KB		 770 __be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
771 __be32 discard_desc_count = cpu_to_be32(0x100);
772
773 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
774 inq_response[1] = VPD_BLOCK_LIMITS;
775 inq_response[3] = 0x3c; /* Page Length */
776 memcpy(&inq_response[8], &max_sectors, sizeof(u32));
777 memcpy(&inq_response[20], &max_discard, sizeof(u32));
778
779 if (max_discard)
780 memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
781
782 return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
783}
784
5d0f6131
VV		 785static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
786 int alloc_len)
787{
788 u8 *inq_response;
e61b0a86 789 int res;
5d0f6131
VV		 790 int xfer_len;
791
03ea83e9 792 inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
5d0f6131
VV		 793 if (inq_response == NULL) {
794 res = -ENOMEM;
795 goto out_mem;
796 }
797
5d0f6131
VV		 798 inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE; /* Page Code */
799 inq_response[2] = 0x00; /* Page Length MSB */
800 inq_response[3] = 0x3C; /* Page Length LSB */
801 inq_response[4] = 0x00; /* Medium Rotation Rate MSB */
802 inq_response[5] = 0x01; /* Medium Rotation Rate LSB */
803 inq_response[6] = 0x00; /* Form Factor */
804
805 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
806 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
807
808 kfree(inq_response);
809 out_mem:
810 return res;
811}
812
813/* LOG SENSE Helper Functions */
814
815static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
816 int alloc_len)
817{
e61b0a86 818 int res;
5d0f6131
VV		 819 int xfer_len;
820 u8 *log_response;
821
03ea83e9 822 log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
5d0f6131
VV		 823 if (log_response == NULL) {
824 res = -ENOMEM;
825 goto out_mem;
826 }
5d0f6131
VV		 827
828 log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
829 /* Subpage=0x00, Page Length MSB=0 */
830 log_response[3] = SUPPORTED_LOG_PAGES_PAGE_LENGTH;
831 log_response[4] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
832 log_response[5] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
833 log_response[6] = LOG_PAGE_TEMPERATURE_PAGE;
834
835 xfer_len = min(alloc_len, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
836 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
837
838 kfree(log_response);
839 out_mem:
840 return res;
841}
842
843static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
844 struct sg_io_hdr *hdr, int alloc_len)
845{
e61b0a86 846 int res;
5d0f6131
VV		 847 int xfer_len;
848 u8 *log_response;
5d0f6131 849 struct nvme_smart_log *smart_log;
5d0f6131
VV		 850 u8 temp_c;
851 u16 temp_k;
852
03ea83e9 853 log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 854 if (log_response == NULL)
855 return -ENOMEM;
5d0f6131 856
1c63dc66 857 res = nvme_get_log_page(ns->ctrl, &smart_log);
d29ec824
CH		 858 if (res < 0)
859 goto out_free_response;
5d0f6131 860
5d0f6131
VV		 861 if (res != NVME_SC_SUCCESS) {
862 temp_c = LOG_TEMP_UNKNOWN;
863 } else {
5d0f6131
VV		 864 temp_k = (smart_log->temperature[1] << 8) +
865 (smart_log->temperature[0]);
866 temp_c = temp_k - KELVIN_TEMP_FACTOR;
867 }
d29ec824 868 kfree(smart_log);
5d0f6131
VV		 869
870 log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
871 /* Subpage=0x00, Page Length MSB=0 */
872 log_response[3] = REMAINING_INFO_EXCP_PAGE_LENGTH;
873 /* Informational Exceptions Log Parameter 1 Start */
874 /* Parameter Code=0x0000 bytes 4,5 */
875 log_response[6] = 0x23; /* DU=0, TSD=1, ETC=0, TMC=0, FMT_AND_LNK=11b */
876 log_response[7] = 0x04; /* PARAMETER LENGTH */
877 /* Add sense Code and qualifier = 0x00 each */
878 /* Use Temperature from NVMe Get Log Page, convert to C from K */
879 log_response[10] = temp_c;
880
881 xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
882 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
883
d29ec824 884 out_free_response:
5d0f6131 885 kfree(log_response);
5d0f6131
VV		 886 return res;
887}
888
889static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
890 int alloc_len)
891{
e61b0a86 892 int res;
5d0f6131
VV		 893 int xfer_len;
894 u8 *log_response;
5d0f6131 895 struct nvme_smart_log *smart_log;
5d0f6131
VV		 896 u32 feature_resp;
897 u8 temp_c_cur, temp_c_thresh;
898 u16 temp_k;
899
03ea83e9 900 log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 901 if (log_response == NULL)
902 return -ENOMEM;
5d0f6131 903
1c63dc66 904 res = nvme_get_log_page(ns->ctrl, &smart_log);
d29ec824
CH		 905 if (res < 0)
906 goto out_free_response;
5d0f6131 907
5d0f6131
VV		 908 if (res != NVME_SC_SUCCESS) {
909 temp_c_cur = LOG_TEMP_UNKNOWN;
910 } else {
5d0f6131
VV		 911 temp_k = (smart_log->temperature[1] << 8) +
912 (smart_log->temperature[0]);
913 temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
914 }
d29ec824 915 kfree(smart_log);
5d0f6131
VV		 916
917 /* Get Features for Temp Threshold */
1c63dc66 918 res = nvme_get_features(ns->ctrl, NVME_FEAT_TEMP_THRESH, 0, 0,
5d0f6131
VV		 919 &feature_resp);
920 if (res != NVME_SC_SUCCESS)
921 temp_c_thresh = LOG_TEMP_UNKNOWN;
922 else
923 temp_c_thresh = (feature_resp & 0xFFFF) - KELVIN_TEMP_FACTOR;
924
925 log_response[0] = LOG_PAGE_TEMPERATURE_PAGE;
926 /* Subpage=0x00, Page Length MSB=0 */
927 log_response[3] = REMAINING_TEMP_PAGE_LENGTH;
928 /* Temperature Log Parameter 1 (Temperature) Start */
929 /* Parameter Code = 0x0000 */
930 log_response[6] = 0x01; /* Format and Linking = 01b */
931 log_response[7] = 0x02; /* Parameter Length */
932 /* Use Temperature from NVMe Get Log Page, convert to C from K */
933 log_response[9] = temp_c_cur;
934 /* Temperature Log Parameter 2 (Reference Temperature) Start */
935 log_response[11] = 0x01; /* Parameter Code = 0x0001 */
936 log_response[12] = 0x01; /* Format and Linking = 01b */
937 log_response[13] = 0x02; /* Parameter Length */
938 /* Use Temperature Thresh from NVMe Get Log Page, convert to C from K */
939 log_response[15] = temp_c_thresh;
940
941 xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
942 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
943
d29ec824 944 out_free_response:
5d0f6131 945 kfree(log_response);
5d0f6131
VV		 946 return res;
947}
948
949/* MODE SENSE Helper Functions */
950
951static int nvme_trans_fill_mode_parm_hdr(u8 *resp, int len, u8 cdb10, u8 llbaa,
952 u16 mode_data_length, u16 blk_desc_len)
953{
954 /* Quick check to make sure I don't stomp on my own memory... */
955 if ((cdb10 && len < 8) || (!cdb10 && len < 4))
e61b0a86 956 return -EINVAL;
5d0f6131
VV		 957
958 if (cdb10) {
959 resp[0] = (mode_data_length & 0xFF00) >> 8;
960 resp[1] = (mode_data_length & 0x00FF);
90851768 961 resp[3] = 0x10 /* DPOFUA */;
5d0f6131
VV		 962 resp[4] = llbaa;
963 resp[5] = RESERVED_FIELD;
964 resp[6] = (blk_desc_len & 0xFF00) >> 8;
965 resp[7] = (blk_desc_len & 0x00FF);
966 } else {
967 resp[0] = (mode_data_length & 0x00FF);
90851768 968 resp[2] = 0x10 /* DPOFUA */;
5d0f6131
VV		 969 resp[3] = (blk_desc_len & 0x00FF);
970 }
971
e61b0a86 972 return 0;
5d0f6131
VV		 973}
974
975static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
976 u8 *resp, int len, u8 llbaa)
977{
e61b0a86 978 int res;
5d0f6131 979 int nvme_sc;
5d0f6131
VV		 980 struct nvme_id_ns *id_ns;
981 u8 flbas;
982 u32 lba_length;
983
984 if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
e61b0a86 985 return -EINVAL;
5d0f6131 986 else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
e61b0a86 987 return -EINVAL;
5d0f6131 988
1c63dc66 989 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 990 res = nvme_trans_status_code(hdr, nvme_sc);
991 if (res)
d29ec824 992 return res;
e61b0a86 993
5d0f6131
VV		 994 flbas = (id_ns->flbas) & 0x0F;
995 lba_length = (1 << (id_ns->lbaf[flbas].ds));
996
997 if (llbaa == 0) {
8741ee4c 998 __be32 tmp_cap = cpu_to_be32(le64_to_cpu(id_ns->ncap));
5d0f6131 999 /* Byte 4 is reserved */
8741ee4c 1000 __be32 tmp_len = cpu_to_be32(lba_length & 0x00FFFFFF);
5d0f6131
VV		 1001
1002 memcpy(resp, &tmp_cap, sizeof(u32));
1003 memcpy(&resp[4], &tmp_len, sizeof(u32));
1004 } else {
8741ee4c
VV		 1005 __be64 tmp_cap = cpu_to_be64(le64_to_cpu(id_ns->ncap));
1006 __be32 tmp_len = cpu_to_be32(lba_length);
5d0f6131
VV		 1007
1008 memcpy(resp, &tmp_cap, sizeof(u64));
1009 /* Bytes 8, 9, 10, 11 are reserved */
1010 memcpy(&resp[12], &tmp_len, sizeof(u32));
1011 }
1012
d29ec824 1013 kfree(id_ns);
5d0f6131
VV		 1014 return res;
1015}
1016
1017static int nvme_trans_fill_control_page(struct nvme_ns *ns,
1018 struct sg_io_hdr *hdr, u8 *resp,
1019 int len)
1020{
1021 if (len < MODE_PAGE_CONTROL_LEN)
e61b0a86 1022 return -EINVAL;
5d0f6131
VV		 1023
1024 resp[0] = MODE_PAGE_CONTROL;
1025 resp[1] = MODE_PAGE_CONTROL_LEN_FIELD;
1026 resp[2] = 0x0E; /* TST=000b, TMF_ONLY=0, DPICZ=1,
1027 * D_SENSE=1, GLTSD=1, RLEC=0 */
1028 resp[3] = 0x12; /* Q_ALGO_MODIFIER=1h, NUAR=0, QERR=01b */
1029 /* Byte 4: VS=0, RAC=0, UA_INT=0, SWP=0 */
1030 resp[5] = 0x40; /* ATO=0, TAS=1, ATMPE=0, RWWP=0, AUTOLOAD=0 */
1031 /* resp[6] and [7] are obsolete, thus zero */
1032 resp[8] = 0xFF; /* Busy timeout period = 0xffff */
1033 resp[9] = 0xFF;
1034 /* Bytes 10,11: Extended selftest completion time = 0x0000 */
1035
e61b0a86 1036 return 0;
5d0f6131
VV		 1037}
1038
1039static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
1040 struct sg_io_hdr *hdr,
1041 u8 *resp, int len)
1042{
e61b0a86 1043 int res = 0;
5d0f6131 1044 int nvme_sc;
5d0f6131
VV		 1045 u32 feature_resp;
1046 u8 vwc;
1047
1048 if (len < MODE_PAGE_CACHING_LEN)
e61b0a86 1049 return -EINVAL;
5d0f6131 1050
1c63dc66 1051 nvme_sc = nvme_get_features(ns->ctrl, NVME_FEAT_VOLATILE_WC, 0, 0,
5d0f6131
VV		 1052 &feature_resp);
1053 res = nvme_trans_status_code(hdr, nvme_sc);
1054 if (res)
e61b0a86
CH		 1055 return res;
1056
5d0f6131
VV		 1057 vwc = feature_resp & 0x00000001;
1058
1059 resp[0] = MODE_PAGE_CACHING;
1060 resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
1061 resp[2] = vwc << 2;
e61b0a86 1062 return 0;
5d0f6131
VV		 1063}
1064
1065static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
1066 struct sg_io_hdr *hdr, u8 *resp,
1067 int len)
1068{
5d0f6131 1069 if (len < MODE_PAGE_POW_CND_LEN)
e61b0a86 1070 return -EINVAL;
5d0f6131
VV		 1071
1072 resp[0] = MODE_PAGE_POWER_CONDITION;
1073 resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
1074 /* All other bytes are zero */
1075
e61b0a86 1076 return 0;
5d0f6131
VV		 1077}
1078
1079static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
1080 struct sg_io_hdr *hdr, u8 *resp,
1081 int len)
1082{
5d0f6131 1083 if (len < MODE_PAGE_INF_EXC_LEN)
e61b0a86 1084 return -EINVAL;
5d0f6131
VV		 1085
1086 resp[0] = MODE_PAGE_INFO_EXCEP;
1087 resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
1088 resp[2] = 0x88;
1089 /* All other bytes are zero */
1090
e61b0a86 1091 return 0;
5d0f6131
VV		 1092}
1093
1094static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1095 u8 *resp, int len)
1096{
e61b0a86 1097 int res;
5d0f6131
VV		 1098 u16 mode_pages_offset_1 = 0;
1099 u16 mode_pages_offset_2, mode_pages_offset_3, mode_pages_offset_4;
1100
1101 mode_pages_offset_2 = mode_pages_offset_1 + MODE_PAGE_CACHING_LEN;
1102 mode_pages_offset_3 = mode_pages_offset_2 + MODE_PAGE_CONTROL_LEN;
1103 mode_pages_offset_4 = mode_pages_offset_3 + MODE_PAGE_POW_CND_LEN;
1104
1105 res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],
1106 MODE_PAGE_CACHING_LEN);
e61b0a86
CH		 1107 if (res)
1108 return res;
5d0f6131
VV		 1109 res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
1110 MODE_PAGE_CONTROL_LEN);
e61b0a86
CH		 1111 if (res)
1112 return res;
5d0f6131
VV		 1113 res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
1114 MODE_PAGE_POW_CND_LEN);
e61b0a86
CH		 1115 if (res)
1116 return res;
1117 return nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
5d0f6131 1118 MODE_PAGE_INF_EXC_LEN);
5d0f6131
VV		 1119}
1120
1121static inline int nvme_trans_get_blk_desc_len(u8 dbd, u8 llbaa)
1122{
1123 if (dbd == MODE_SENSE_BLK_DESC_ENABLED) {
1124 /* SPC-4: len = 8 x Num_of_descriptors if llbaa = 0, 16x if 1 */
1125 return 8 * (llbaa + 1) * MODE_SENSE_BLK_DESC_COUNT;
1126 } else {
1127 return 0;
1128 }
1129}
1130
1131static int nvme_trans_mode_page_create(struct nvme_ns *ns,
1132 struct sg_io_hdr *hdr, u8 *cmd,
1133 u16 alloc_len, u8 cdb10,
1134 int (*mode_page_fill_func)
1135 (struct nvme_ns *,
1136 struct sg_io_hdr *hdr, u8 *, int),
1137 u16 mode_pages_tot_len)
1138{
e61b0a86 1139 int res;
5d0f6131
VV		 1140 int xfer_len;
1141 u8 *response;
1142 u8 dbd, llbaa;
1143 u16 resp_size;
1144 int mph_size;
1145 u16 mode_pages_offset_1;
1146 u16 blk_desc_len, blk_desc_offset, mode_data_length;
1147
3726897e
CH		 1148 dbd = (cmd[1] & MODE_SENSE_DBD_MASK) >> MODE_SENSE_DBD_SHIFT;
1149 llbaa = (cmd[1] & MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT;
1150 mph_size = cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE;
1151
5d0f6131
VV		 1152 blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa);
1153
1154 resp_size = mph_size + blk_desc_len + mode_pages_tot_len;
1155 /* Refer spc4r34 Table 440 for calculation of Mode data Length field */
1156 mode_data_length = 3 + (3 * cdb10) + blk_desc_len + mode_pages_tot_len;
1157
1158 blk_desc_offset = mph_size;
1159 mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
1160
03ea83e9 1161 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 1162 if (response == NULL) {
1163 res = -ENOMEM;
1164 goto out_mem;
1165 }
5d0f6131
VV		 1166
1167 res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
1168 llbaa, mode_data_length, blk_desc_len);
e61b0a86 1169 if (res)
5d0f6131
VV		 1170 goto out_free;
1171 if (blk_desc_len > 0) {
1172 res = nvme_trans_fill_blk_desc(ns, hdr,
1173 &response[blk_desc_offset],
1174 blk_desc_len, llbaa);
e61b0a86 1175 if (res)
5d0f6131
VV		 1176 goto out_free;
1177 }
1178 res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
1179 mode_pages_tot_len);
e61b0a86 1180 if (res)
5d0f6131
VV		 1181 goto out_free;
1182
1183 xfer_len = min(alloc_len, resp_size);
1184 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
1185
1186 out_free:
1187 kfree(response);
1188 out_mem:
1189 return res;
1190}
1191
1192/* Read Capacity Helper Functions */
1193
1194static void nvme_trans_fill_read_cap(u8 *response, struct nvme_id_ns *id_ns,
1195 u8 cdb16)
1196{
1197 u8 flbas;
1198 u32 lba_length;
1199 u64 rlba;
1200 u8 prot_en;
1201 u8 p_type_lut[4] = {0, 0, 1, 2};
8741ee4c
VV		 1202 __be64 tmp_rlba;
1203 __be32 tmp_rlba_32;
1204 __be32 tmp_len;
5d0f6131
VV		 1205
1206 flbas = (id_ns->flbas) & 0x0F;
1207 lba_length = (1 << (id_ns->lbaf[flbas].ds));
1208 rlba = le64_to_cpup(&id_ns->nsze) - 1;
1209 (id_ns->dps) ? (prot_en = 0x01) : (prot_en = 0);
1210
1211 if (!cdb16) {
1212 if (rlba > 0xFFFFFFFF)
1213 rlba = 0xFFFFFFFF;
1214 tmp_rlba_32 = cpu_to_be32(rlba);
1215 tmp_len = cpu_to_be32(lba_length);
1216 memcpy(response, &tmp_rlba_32, sizeof(u32));
1217 memcpy(&response[4], &tmp_len, sizeof(u32));
1218 } else {
1219 tmp_rlba = cpu_to_be64(rlba);
1220 tmp_len = cpu_to_be32(lba_length);
1221 memcpy(response, &tmp_rlba, sizeof(u64));
1222 memcpy(&response[8], &tmp_len, sizeof(u32));
1223 response[12] = (p_type_lut[id_ns->dps & 0x3] << 1) | prot_en;
1224 /* P_I_Exponent = 0x0 | LBPPBE = 0x0 */
1225 /* LBPME = 0 | LBPRZ = 0 | LALBA = 0x00 */
1226 /* Bytes 16-31 - Reserved */
1227 }
1228}
1229
1230/* Start Stop Unit Helper Functions */
1231
1232static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1233 u8 pc, u8 pcmod, u8 start)
1234{
e61b0a86 1235 int res;
5d0f6131 1236 int nvme_sc;
5d0f6131
VV		 1237 struct nvme_id_ctrl *id_ctrl;
1238 int lowest_pow_st; /* max npss = lowest power consumption */
1239 unsigned ps_desired = 0;
1240
1c63dc66 1241 nvme_sc = nvme_identify_ctrl(ns->ctrl, &id_ctrl);
5d0f6131
VV		 1242 res = nvme_trans_status_code(hdr, nvme_sc);
1243 if (res)
d29ec824 1244 return res;
e61b0a86 1245
b8e08084 1246 lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
d29ec824 1247 kfree(id_ctrl);
5d0f6131
VV		 1248
1249 switch (pc) {
1250 case NVME_POWER_STATE_START_VALID:
1251 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1252 if (pcmod == 0 && start == 0x1)
1253 ps_desired = POWER_STATE_0;
1254 if (pcmod == 0 && start == 0x0)
1255 ps_desired = lowest_pow_st;
1256 break;
1257 case NVME_POWER_STATE_ACTIVE:
1258 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1259 if (pcmod == 0)
1260 ps_desired = POWER_STATE_0;
1261 break;
1262 case NVME_POWER_STATE_IDLE:
1263 /* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
5d0f6131 1264 if (pcmod == 0x0)
b8e08084 1265 ps_desired = POWER_STATE_1;
5d0f6131 1266 else if (pcmod == 0x1)
b8e08084 1267 ps_desired = POWER_STATE_2;
5d0f6131 1268 else if (pcmod == 0x2)
b8e08084 1269 ps_desired = POWER_STATE_3;
5d0f6131
VV		 1270 break;
1271 case NVME_POWER_STATE_STANDBY:
1272 /* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
1273 if (pcmod == 0x0)
b8e08084 1274 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 2));
5d0f6131 1275 else if (pcmod == 0x1)
b8e08084 1276 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 1));
5d0f6131
VV		 1277 break;
1278 case NVME_POWER_STATE_LU_CONTROL:
1279 default:
1280 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1281 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1282 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1283 break;
1284 }
1c63dc66 1285 nvme_sc = nvme_set_features(ns->ctrl, NVME_FEAT_POWER_MGMT, ps_desired, 0,
5d0f6131 1286 NULL);
d29ec824 1287 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1288}
1289
b90c48d0
CH		 1290static int nvme_trans_send_activate_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1291 u8 buffer_id)
1292{
1293 struct nvme_command c;
1294 int nvme_sc;
5d0f6131 1295
b90c48d0
CH		 1296 memset(&c, 0, sizeof(c));
1297 c.common.opcode = nvme_admin_activate_fw;
1298 c.common.cdw10[0] = cpu_to_le32(buffer_id | NVME_FWACT_REPL_ACTV);
1299
d29ec824 1300 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
e61b0a86 1301 return nvme_trans_status_code(hdr, nvme_sc);
b90c48d0 1302}
5d0f6131 1303
b90c48d0 1304static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
5d0f6131
VV		 1305 u8 opcode, u32 tot_len, u32 offset,
1306 u8 buffer_id)
1307{
5d0f6131 1308 int nvme_sc;
5d0f6131 1309 struct nvme_command c;
5d0f6131 1310
b90c48d0
CH		 1311 if (hdr->iovec_count > 0) {
1312 /* Assuming SGL is not allowed for this command */
1313 return nvme_trans_completion(hdr,
1314 SAM_STAT_CHECK_CONDITION,
1315 ILLEGAL_REQUEST,
1316 SCSI_ASC_INVALID_CDB,
1317 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1318 }
1319
d29ec824
CH		 1320 memset(&c, 0, sizeof(c));
1321 c.common.opcode = nvme_admin_download_fw;
b90c48d0
CH		 1322 c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
1323 c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
1324
4160982e 1325 nvme_sc = nvme_submit_user_cmd(ns->ctrl->admin_q, &c,
d29ec824
CH		 1326 hdr->dxferp, tot_len, NULL, 0);
1327 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1328}
1329
1330/* Mode Select Helper Functions */
1331
1332static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10,
1333 u16 *bd_len, u8 *llbaa)
1334{
1335 if (cdb10) {
1336 /* 10 Byte CDB */
1337 *bd_len = (parm_list[MODE_SELECT_10_BD_OFFSET] << 8) +
1338 parm_list[MODE_SELECT_10_BD_OFFSET + 1];
9ac16938 1339 *llbaa = parm_list[MODE_SELECT_10_LLBAA_OFFSET] &
5d0f6131
VV		 1340 MODE_SELECT_10_LLBAA_MASK;
1341 } else {
1342 /* 6 Byte CDB */
1343 *bd_len = parm_list[MODE_SELECT_6_BD_OFFSET];
1344 }
1345}
1346
1347static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list,
1348 u16 idx, u16 bd_len, u8 llbaa)
1349{
1350 u16 bd_num;
1351
1352 bd_num = bd_len / ((llbaa == 0) ?
1353 SHORT_DESC_BLOCK : LONG_DESC_BLOCK);
1354 /* Store block descriptor info if a FORMAT UNIT comes later */
1355 /* TODO Saving 1st BD info; what to do if multiple BD received? */
1356 if (llbaa == 0) {
1357 /* Standard Block Descriptor - spc4r34 7.5.5.1 */
1358 ns->mode_select_num_blocks =
1359 (parm_list[idx + 1] << 16) +
1360 (parm_list[idx + 2] << 8) +
1361 (parm_list[idx + 3]);
1362
1363 ns->mode_select_block_len =
1364 (parm_list[idx + 5] << 16) +
1365 (parm_list[idx + 6] << 8) +
1366 (parm_list[idx + 7]);
1367 } else {
1368 /* Long LBA Block Descriptor - sbc3r27 6.4.2.3 */
1369 ns->mode_select_num_blocks =
1370 (((u64)parm_list[idx + 0]) << 56) +
1371 (((u64)parm_list[idx + 1]) << 48) +
1372 (((u64)parm_list[idx + 2]) << 40) +
1373 (((u64)parm_list[idx + 3]) << 32) +
1374 (((u64)parm_list[idx + 4]) << 24) +
1375 (((u64)parm_list[idx + 5]) << 16) +
1376 (((u64)parm_list[idx + 6]) << 8) +
1377 ((u64)parm_list[idx + 7]);
1378
1379 ns->mode_select_block_len =
1380 (parm_list[idx + 12] << 24) +
1381 (parm_list[idx + 13] << 16) +
1382 (parm_list[idx + 14] << 8) +
1383 (parm_list[idx + 15]);
1384 }
1385}
1386
710a143d 1387static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,
5d0f6131
VV		 1388 u8 *mode_page, u8 page_code)
1389{
e61b0a86 1390 int res = 0;
5d0f6131 1391 int nvme_sc;
5d0f6131
VV		 1392 unsigned dword11;
1393
1394 switch (page_code) {
1395 case MODE_PAGE_CACHING:
1396 dword11 = ((mode_page[2] & CACHING_MODE_PAGE_WCE_MASK) ? 1 : 0);
1c63dc66
CH		 1397 nvme_sc = nvme_set_features(ns->ctrl, NVME_FEAT_VOLATILE_WC,
1398 dword11, 0, NULL);
5d0f6131 1399 res = nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1400 break;
1401 case MODE_PAGE_CONTROL:
1402 break;
1403 case MODE_PAGE_POWER_CONDITION:
1404 /* Verify the OS is not trying to set timers */
1405 if ((mode_page[2] & 0x01) != 0 || (mode_page[3] & 0x0F) != 0) {
1406 res = nvme_trans_completion(hdr,
1407 SAM_STAT_CHECK_CONDITION,
1408 ILLEGAL_REQUEST,
1409 SCSI_ASC_INVALID_PARAMETER,
1410 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1411 break;
1412 }
1413 break;
1414 default:
1415 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1416 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1417 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1418 break;
1419 }
1420
1421 return res;
1422}
1423
1424static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1425 u8 *cmd, u16 parm_list_len, u8 pf,
1426 u8 sp, u8 cdb10)
1427{
e61b0a86 1428 int res;
5d0f6131
VV		 1429 u8 *parm_list;
1430 u16 bd_len;
1431 u8 llbaa = 0;
1432 u16 index, saved_index;
1433 u8 page_code;
1434 u16 mp_size;
1435
1436 /* Get parm list from data-in/out buffer */
1437 parm_list = kmalloc(parm_list_len, GFP_KERNEL);
1438 if (parm_list == NULL) {
1439 res = -ENOMEM;
1440 goto out;
1441 }
1442
1443 res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);
e61b0a86 1444 if (res)
5d0f6131
VV		 1445 goto out_mem;
1446
1447 nvme_trans_modesel_get_bd_len(parm_list, cdb10, &bd_len, &llbaa);
1448 index = (cdb10) ? (MODE_SELECT_10_MPH_SIZE) : (MODE_SELECT_6_MPH_SIZE);
1449
1450 if (bd_len != 0) {
1451 /* Block Descriptors present, parse */
1452 nvme_trans_modesel_save_bd(ns, parm_list, index, bd_len, llbaa);
1453 index += bd_len;
1454 }
1455 saved_index = index;
1456
1457 /* Multiple mode pages may be present; iterate through all */
1458 /* In 1st Iteration, don't do NVME Command, only check for CDB errors */
1459 do {
1460 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1461 mp_size = parm_list[index + 1] + 2;
1462 if ((page_code != MODE_PAGE_CACHING) &&
1463 (page_code != MODE_PAGE_CONTROL) &&
1464 (page_code != MODE_PAGE_POWER_CONDITION)) {
1465 res = nvme_trans_completion(hdr,
1466 SAM_STAT_CHECK_CONDITION,
1467 ILLEGAL_REQUEST,
1468 SCSI_ASC_INVALID_CDB,
1469 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1470 goto out_mem;
1471 }
1472 index += mp_size;
1473 } while (index < parm_list_len);
1474
1475 /* In 2nd Iteration, do the NVME Commands */
1476 index = saved_index;
1477 do {
1478 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1479 mp_size = parm_list[index + 1] + 2;
1480 res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],
1481 page_code);
e61b0a86 1482 if (res)
5d0f6131
VV		 1483 break;
1484 index += mp_size;
1485 } while (index < parm_list_len);
1486
1487 out_mem:
1488 kfree(parm_list);
1489 out:
1490 return res;
1491}
1492
1493/* Format Unit Helper Functions */
1494
1495static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
1496 struct sg_io_hdr *hdr)
1497{
e61b0a86 1498 int res = 0;
5d0f6131 1499 int nvme_sc;
5d0f6131
VV		 1500 u8 flbas;
1501
1502 /*
1503 * SCSI Expects a MODE SELECT would have been issued prior to
1504 * a FORMAT UNIT, and the block size and number would be used
1505 * from the block descriptor in it. If a MODE SELECT had not
1506 * been issued, FORMAT shall use the current values for both.
1507 */
1508
1509 if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
d29ec824
CH		 1510 struct nvme_id_ns *id_ns;
1511
1c63dc66 1512 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 1513 res = nvme_trans_status_code(hdr, nvme_sc);
1514 if (res)
d29ec824 1515 return res;
5d0f6131
VV		 1516
1517 if (ns->mode_select_num_blocks == 0)
8741ee4c 1518 ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
5d0f6131
VV		 1519 if (ns->mode_select_block_len == 0) {
1520 flbas = (id_ns->flbas) & 0x0F;
1521 ns->mode_select_block_len =
1522 (1 << (id_ns->lbaf[flbas].ds));
1523 }
d29ec824
CH		 1524
1525 kfree(id_ns);
5d0f6131 1526 }
d29ec824
CH		 1527
1528 return 0;
5d0f6131
VV		 1529}
1530
1531static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
1532 u8 format_prot_info, u8 *nvme_pf_code)
1533{
e61b0a86 1534 int res;
5d0f6131
VV		 1535 u8 *parm_list;
1536 u8 pf_usage, pf_code;
1537
1538 parm_list = kmalloc(len, GFP_KERNEL);
1539 if (parm_list == NULL) {
1540 res = -ENOMEM;
1541 goto out;
1542 }
1543 res = nvme_trans_copy_from_user(hdr, parm_list, len);
e61b0a86 1544 if (res)
5d0f6131
VV		 1545 goto out_mem;
1546
1547 if ((parm_list[FORMAT_UNIT_IMMED_OFFSET] &
1548 FORMAT_UNIT_IMMED_MASK) != 0) {
1549 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1550 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1551 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1552 goto out_mem;
1553 }
1554
1555 if (len == FORMAT_UNIT_LONG_PARM_LIST_LEN &&
1556 (parm_list[FORMAT_UNIT_PROT_INT_OFFSET] & 0x0F) != 0) {
1557 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1558 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1559 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1560 goto out_mem;
1561 }
1562 pf_usage = parm_list[FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET] &
1563 FORMAT_UNIT_PROT_FIELD_USAGE_MASK;
1564 pf_code = (pf_usage << 2) | format_prot_info;
1565 switch (pf_code) {
1566 case 0:
1567 *nvme_pf_code = 0;
1568 break;
1569 case 2:
1570 *nvme_pf_code = 1;
1571 break;
1572 case 3:
1573 *nvme_pf_code = 2;
1574 break;
1575 case 7:
1576 *nvme_pf_code = 3;
1577 break;
1578 default:
1579 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1580 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1581 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1582 break;
1583 }
1584
1585 out_mem:
1586 kfree(parm_list);
1587 out:
1588 return res;
1589}
1590
1591static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1592 u8 prot_info)
1593{
e61b0a86 1594 int res;
5d0f6131 1595 int nvme_sc;
5d0f6131
VV		 1596 struct nvme_id_ns *id_ns;
1597 u8 i;
1598 u8 flbas, nlbaf;
1599 u8 selected_lbaf = 0xFF;
1600 u32 cdw10 = 0;
1601 struct nvme_command c;
1602
1603 /* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
1c63dc66 1604 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 1605 res = nvme_trans_status_code(hdr, nvme_sc);
1606 if (res)
d29ec824 1607 return res;
e61b0a86 1608
5d0f6131
VV		 1609 flbas = (id_ns->flbas) & 0x0F;
1610 nlbaf = id_ns->nlbaf;
1611
1612 for (i = 0; i < nlbaf; i++) {
1613 if (ns->mode_select_block_len == (1 << (id_ns->lbaf[i].ds))) {
1614 selected_lbaf = i;
1615 break;
1616 }
1617 }
1618 if (selected_lbaf > 0x0F) {
1619 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1620 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1621 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1622 }
8741ee4c 1623 if (ns->mode_select_num_blocks != le64_to_cpu(id_ns->ncap)) {
5d0f6131
VV		 1624 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1625 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1626 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1627 }
1628
1629 cdw10 |= prot_info << 5;
1630 cdw10 |= selected_lbaf & 0x0F;
1631 memset(&c, 0, sizeof(c));
1632 c.format.opcode = nvme_admin_format_nvm;
8741ee4c 1633 c.format.nsid = cpu_to_le32(ns->ns_id);
5d0f6131
VV		 1634 c.format.cdw10 = cpu_to_le32(cdw10);
1635
1c63dc66 1636 nvme_sc = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, NULL, 0);
5d0f6131 1637 res = nvme_trans_status_code(hdr, nvme_sc);
5d0f6131 1638
d29ec824 1639 kfree(id_ns);
5d0f6131
VV		 1640 return res;
1641}
1642
5d0f6131
VV		 1643static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,
1644 struct nvme_trans_io_cdb *cdb_info,
1645 u32 max_blocks)
1646{
1647 /* If using iovecs, send one nvme command per vector */
1648 if (hdr->iovec_count > 0)
1649 return hdr->iovec_count;
1650 else if (cdb_info->xfer_len > max_blocks)
1651 return ((cdb_info->xfer_len - 1) / max_blocks) + 1;
1652 else
1653 return 1;
1654}
1655
1656static u16 nvme_trans_io_get_control(struct nvme_ns *ns,
1657 struct nvme_trans_io_cdb *cdb_info)
1658{
1659 u16 control = 0;
1660
1661 /* When Protection information support is added, implement here */
1662
1663 if (cdb_info->fua > 0)
1664 control |= NVME_RW_FUA;
1665
1666 return control;
1667}
1668
1669static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1670 struct nvme_trans_io_cdb *cdb_info, u8 is_write)
1671{
e61b0a86 1672 int nvme_sc = NVME_SC_SUCCESS;
5d0f6131 1673 u32 num_cmds;
5d0f6131
VV		 1674 u64 unit_len;
1675 u64 unit_num_blocks; /* Number of blocks to xfer in each nvme cmd */
1676 u32 retcode;
1677 u32 i = 0;
1678 u64 nvme_offset = 0;
8741ee4c 1679 void __user *next_mapping_addr;
5d0f6131
VV		 1680 struct nvme_command c;
1681 u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
1682 u16 control;
ddcb7762 1683 u32 max_blocks = queue_max_hw_sectors(ns->queue);
5d0f6131
VV		 1684
1685 num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
1686
1687 /*
1688 * This loop handles two cases.
1689 * First, when an SGL is used in the form of an iovec list:
1690 * - Use iov_base as the next mapping address for the nvme command_id
1691 * - Use iov_len as the data transfer length for the command.
1692 * Second, when we have a single buffer
1693 * - If larger than max_blocks, split into chunks, offset
1694 * each nvme command accordingly.
1695 */
1696 for (i = 0; i < num_cmds; i++) {
1697 memset(&c, 0, sizeof(c));
1698 if (hdr->iovec_count > 0) {
8741ee4c
VV		 1699 struct sg_iovec sgl;
1700
1701 retcode = copy_from_user(&sgl, hdr->dxferp +
1702 i * sizeof(struct sg_iovec),
1703 sizeof(struct sg_iovec));
1704 if (retcode)
1705 return -EFAULT;
1706 unit_len = sgl.iov_len;
5d0f6131 1707 unit_num_blocks = unit_len >> ns->lba_shift;
8741ee4c 1708 next_mapping_addr = sgl.iov_base;
5d0f6131
VV		 1709 } else {
1710 unit_num_blocks = min((u64)max_blocks,
1711 (cdb_info->xfer_len - nvme_offset));
1712 unit_len = unit_num_blocks << ns->lba_shift;
1713 next_mapping_addr = hdr->dxferp +
1714 ((1 << ns->lba_shift) * nvme_offset);
1715 }
1716
1717 c.rw.opcode = opcode;
1718 c.rw.nsid = cpu_to_le32(ns->ns_id);
1719 c.rw.slba = cpu_to_le64(cdb_info->lba + nvme_offset);
1720 c.rw.length = cpu_to_le16(unit_num_blocks - 1);
1721 control = nvme_trans_io_get_control(ns, cdb_info);
1722 c.rw.control = cpu_to_le16(control);
1723
d29ec824
CH		 1724 if (get_capacity(ns->disk) - unit_num_blocks <
1725 cdb_info->lba + nvme_offset) {
1726 nvme_sc = NVME_SC_LBA_RANGE;
1727 break;
5d0f6131 1728 }
4160982e 1729 nvme_sc = nvme_submit_user_cmd(ns->queue, &c,
d29ec824
CH		 1730 next_mapping_addr, unit_len, NULL, 0);
1731 if (nvme_sc)
1732 break;
5d0f6131
VV		 1733
1734 nvme_offset += unit_num_blocks;
5d0f6131 1735 }
5d0f6131 1736
e61b0a86 1737 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1738}
1739
1740
1741/* SCSI Command Translation Functions */
1742
1743static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,
1744 u8 *cmd)
1745{
e61b0a86 1746 int res = 0;
cbbb7a2e 1747 struct nvme_trans_io_cdb cdb_info = { 0, };
5d0f6131
VV		 1748 u8 opcode = cmd[0];
1749 u64 xfer_bytes;
1750 u64 sum_iov_len = 0;
8741ee4c 1751 struct sg_iovec sgl;
5d0f6131 1752 int i;
8741ee4c 1753 size_t not_copied;
5d0f6131 1754
cbbb7a2e
CH		 1755 /*
1756 * The FUA and WPROTECT fields are not supported in 6-byte CDBs,
1757 * but always in the same place for all others.
1758 */
1759 switch (opcode) {
1760 case WRITE_6:
1761 case READ_6:
1762 break;
1763 default:
1764 cdb_info.fua = cmd[1] & 0x8;
1765 cdb_info.prot_info = (cmd[1] & 0xe0) >> 5;
772ce435
CH		 1766 if (cdb_info.prot_info && !ns->pi_type) {
1767 return nvme_trans_completion(hdr,
1768 SAM_STAT_CHECK_CONDITION,
1769 ILLEGAL_REQUEST,
1770 SCSI_ASC_INVALID_CDB,
1771 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1772 }
cbbb7a2e
CH		 1773 }
1774
5d0f6131
VV		 1775 switch (opcode) {
1776 case WRITE_6:
1777 case READ_6:
cbbb7a2e
CH		 1778 cdb_info.lba = get_unaligned_be24(&cmd[1]);
1779 cdb_info.xfer_len = cmd[4];
1780 if (cdb_info.xfer_len == 0)
1781 cdb_info.xfer_len = 256;
5d0f6131
VV		 1782 break;
1783 case WRITE_10:
1784 case READ_10:
cbbb7a2e
CH		 1785 cdb_info.lba = get_unaligned_be32(&cmd[2]);
1786 cdb_info.xfer_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 1787 break;
1788 case WRITE_12:
1789 case READ_12:
cbbb7a2e
CH		 1790 cdb_info.lba = get_unaligned_be32(&cmd[2]);
1791 cdb_info.xfer_len = get_unaligned_be32(&cmd[6]);
5d0f6131
VV		 1792 break;
1793 case WRITE_16:
1794 case READ_16:
cbbb7a2e
CH		 1795 cdb_info.lba = get_unaligned_be64(&cmd[2]);
1796 cdb_info.xfer_len = get_unaligned_be32(&cmd[10]);
5d0f6131
VV		 1797 break;
1798 default:
1799 /* Will never really reach here */
e61b0a86 1800 res = -EIO;
5d0f6131
VV		 1801 goto out;
1802 }
1803
1804 /* Calculate total length of transfer (in bytes) */
1805 if (hdr->iovec_count > 0) {
5d0f6131 1806 for (i = 0; i < hdr->iovec_count; i++) {
8741ee4c
VV		 1807 not_copied = copy_from_user(&sgl, hdr->dxferp +
1808 i * sizeof(struct sg_iovec),
1809 sizeof(struct sg_iovec));
1810 if (not_copied)
1811 return -EFAULT;
1812 sum_iov_len += sgl.iov_len;
5d0f6131 1813 /* IO vector sizes should be multiples of block size */
8741ee4c 1814 if (sgl.iov_len % (1 << ns->lba_shift) != 0) {
5d0f6131
VV		 1815 res = nvme_trans_completion(hdr,
1816 SAM_STAT_CHECK_CONDITION,
1817 ILLEGAL_REQUEST,
1818 SCSI_ASC_INVALID_PARAMETER,
1819 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1820 goto out;
1821 }
1822 }
1823 } else {
1824 sum_iov_len = hdr->dxfer_len;
1825 }
1826
1827 /* As Per sg ioctl howto, if the lengths differ, use the lower one */
1828 xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);
1829
1830 /* If block count and actual data buffer size dont match, error out */
1831 if (xfer_bytes != (cdb_info.xfer_len << ns->lba_shift)) {
1832 res = -EINVAL;
1833 goto out;
1834 }
1835
1836 /* Check for 0 length transfer - it is not illegal */
1837 if (cdb_info.xfer_len == 0)
1838 goto out;
1839
1840 /* Send NVMe IO Command(s) */
1841 res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);
e61b0a86 1842 if (res)
5d0f6131
VV		 1843 goto out;
1844
1845 out:
1846 return res;
1847}
1848
1849static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1850 u8 *cmd)
1851{
e61b0a86 1852 int res = 0;
5d0f6131
VV		 1853 u8 evpd;
1854 u8 page_code;
1855 int alloc_len;
1856 u8 *inq_response;
1857
3726897e
CH		 1858 evpd = cmd[1] & 0x01;
1859 page_code = cmd[2];
1860 alloc_len = get_unaligned_be16(&cmd[3]);
5d0f6131 1861
3fd61b20
CH		 1862 inq_response = kmalloc(max(alloc_len, STANDARD_INQUIRY_LENGTH),
1863 GFP_KERNEL);
5d0f6131
VV		 1864 if (inq_response == NULL) {
1865 res = -ENOMEM;
1866 goto out_mem;
1867 }
1868
1869 if (evpd == 0) {
1870 if (page_code == INQ_STANDARD_INQUIRY_PAGE) {
1871 res = nvme_trans_standard_inquiry_page(ns, hdr,
1872 inq_response, alloc_len);
1873 } else {
1874 res = nvme_trans_completion(hdr,
1875 SAM_STAT_CHECK_CONDITION,
1876 ILLEGAL_REQUEST,
1877 SCSI_ASC_INVALID_CDB,
1878 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1879 }
1880 } else {
1881 switch (page_code) {
1882 case VPD_SUPPORTED_PAGES:
1883 res = nvme_trans_supported_vpd_pages(ns, hdr,
1884 inq_response, alloc_len);
1885 break;
1886 case VPD_SERIAL_NUMBER:
1887 res = nvme_trans_unit_serial_page(ns, hdr, inq_response,
1888 alloc_len);
1889 break;
1890 case VPD_DEVICE_IDENTIFIERS:
1891 res = nvme_trans_device_id_page(ns, hdr, inq_response,
1892 alloc_len);
1893 break;
1894 case VPD_EXTENDED_INQUIRY:
1895 res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
1896 break;
7f749d9c
KB		 1897 case VPD_BLOCK_LIMITS:
1898 res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
1899 alloc_len);
1900 break;
5d0f6131
VV		 1901 case VPD_BLOCK_DEV_CHARACTERISTICS:
1902 res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
1903 break;
1904 default:
1905 res = nvme_trans_completion(hdr,
1906 SAM_STAT_CHECK_CONDITION,
1907 ILLEGAL_REQUEST,
1908 SCSI_ASC_INVALID_CDB,
1909 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1910 break;
1911 }
1912 }
1913 kfree(inq_response);
1914 out_mem:
1915 return res;
1916}
1917
1918static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1919 u8 *cmd)
1920{
e61b0a86 1921 int res;
5d0f6131 1922 u16 alloc_len;
5d0f6131
VV		 1923 u8 pc;
1924 u8 page_code;
1925
3726897e 1926 if (cmd[1] != LOG_SENSE_CDB_SP_NOT_ENABLED) {
5d0f6131
VV		 1927 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1928 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1929 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1930 goto out;
1931 }
3726897e
CH		 1932
1933 page_code = cmd[2] & LOG_SENSE_CDB_PAGE_CODE_MASK;
1934 pc = (cmd[2] & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT;
5d0f6131
VV		 1935 if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) {
1936 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1937 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1938 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1939 goto out;
1940 }
3726897e 1941 alloc_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 1942 switch (page_code) {
1943 case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE:
1944 res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);
1945 break;
1946 case LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE:
1947 res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);
1948 break;
1949 case LOG_PAGE_TEMPERATURE_PAGE:
1950 res = nvme_trans_log_temperature(ns, hdr, alloc_len);
1951 break;
1952 default:
1953 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1954 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1955 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1956 break;
1957 }
1958
1959 out:
1960 return res;
1961}
1962
1963static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1964 u8 *cmd)
1965{
5d0f6131
VV		 1966 u8 cdb10 = 0;
1967 u16 parm_list_len;
1968 u8 page_format;
1969 u8 save_pages;
1970
3726897e
CH		 1971 page_format = cmd[1] & MODE_SELECT_CDB_PAGE_FORMAT_MASK;
1972 save_pages = cmd[1] & MODE_SELECT_CDB_SAVE_PAGES_MASK;
5d0f6131 1973
3726897e
CH		 1974 if (cmd[0] == MODE_SELECT) {
1975 parm_list_len = cmd[4];
5d0f6131 1976 } else {
3726897e 1977 parm_list_len = cmd[7];
5d0f6131
VV		 1978 cdb10 = 1;
1979 }
1980
1981 if (parm_list_len != 0) {
1982 /*
1983 * According to SPC-4 r24, a paramter list length field of 0
1984 * shall not be considered an error
1985 */
e61b0a86 1986 return nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
5d0f6131
VV		 1987 page_format, save_pages, cdb10);
1988 }
1989
e61b0a86 1990 return 0;
5d0f6131
VV		 1991}
1992
1993static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1994 u8 *cmd)
1995{
e61b0a86 1996 int res = 0;
5d0f6131
VV		 1997 u16 alloc_len;
1998 u8 cdb10 = 0;
5d0f6131 1999
3726897e
CH		 2000 if (cmd[0] == MODE_SENSE) {
2001 alloc_len = cmd[4];
5d0f6131 2002 } else {
3726897e 2003 alloc_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 2004 cdb10 = 1;
2005 }
2006
3726897e
CH		 2007 if ((cmd[2] & MODE_SENSE_PAGE_CONTROL_MASK) !=
2008 MODE_SENSE_PC_CURRENT_VALUES) {
5d0f6131
VV		 2009 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2010 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2011 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2012 goto out;
2013 }
2014
3726897e 2015 switch (cmd[2] & MODE_SENSE_PAGE_CODE_MASK) {
5d0f6131
VV		 2016 case MODE_PAGE_CACHING:
2017 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2018 cdb10,
2019 &nvme_trans_fill_caching_page,
2020 MODE_PAGE_CACHING_LEN);
2021 break;
2022 case MODE_PAGE_CONTROL:
2023 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2024 cdb10,
2025 &nvme_trans_fill_control_page,
2026 MODE_PAGE_CONTROL_LEN);
2027 break;
2028 case MODE_PAGE_POWER_CONDITION:
2029 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2030 cdb10,
2031 &nvme_trans_fill_pow_cnd_page,
2032 MODE_PAGE_POW_CND_LEN);
2033 break;
2034 case MODE_PAGE_INFO_EXCEP:
2035 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2036 cdb10,
2037 &nvme_trans_fill_inf_exc_page,
2038 MODE_PAGE_INF_EXC_LEN);
2039 break;
2040 case MODE_PAGE_RETURN_ALL:
2041 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2042 cdb10,
2043 &nvme_trans_fill_all_pages,
2044 MODE_PAGE_ALL_LEN);
2045 break;
2046 default:
2047 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2048 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2049 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2050 break;
2051 }
2052
2053 out:
2054 return res;
2055}
2056
2057static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
3726897e 2058 u8 *cmd, u8 cdb16)
5d0f6131 2059{
e61b0a86 2060 int res;
5d0f6131 2061 int nvme_sc;
3726897e
CH		 2062 u32 alloc_len;
2063 u32 resp_size;
5d0f6131 2064 u32 xfer_len;
5d0f6131
VV		 2065 struct nvme_id_ns *id_ns;
2066 u8 *response;
2067
5d0f6131 2068 if (cdb16) {
3726897e 2069 alloc_len = get_unaligned_be32(&cmd[10]);
5d0f6131 2070 resp_size = READ_CAP_16_RESP_SIZE;
3726897e
CH		 2071 } else {
2072 alloc_len = READ_CAP_10_RESP_SIZE;
2073 resp_size = READ_CAP_10_RESP_SIZE;
5d0f6131
VV		 2074 }
2075
1c63dc66 2076 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 2077 res = nvme_trans_status_code(hdr, nvme_sc);
2078 if (res)
d29ec824 2079 return res;
5d0f6131 2080
03ea83e9 2081 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2082 if (response == NULL) {
2083 res = -ENOMEM;
d29ec824 2084 goto out_free_id;
5d0f6131 2085 }
5d0f6131
VV		 2086 nvme_trans_fill_read_cap(response, id_ns, cdb16);
2087
2088 xfer_len = min(alloc_len, resp_size);
2089 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2090
2091 kfree(response);
d29ec824
CH		 2092 out_free_id:
2093 kfree(id_ns);
5d0f6131
VV		 2094 return res;
2095}
2096
2097static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2098 u8 *cmd)
2099{
e61b0a86 2100 int res;
5d0f6131
VV		 2101 int nvme_sc;
2102 u32 alloc_len, xfer_len, resp_size;
5d0f6131 2103 u8 *response;
5d0f6131
VV		 2104 struct nvme_id_ctrl *id_ctrl;
2105 u32 ll_length, lun_id;
2106 u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
8741ee4c 2107 __be32 tmp_len;
5d0f6131 2108
3726897e
CH		 2109 switch (cmd[2]) {
2110 default:
2111 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2112 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2113 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
3726897e
CH		 2114 case ALL_LUNS_RETURNED:
2115 case ALL_WELL_KNOWN_LUNS_RETURNED:
2116 case RESTRICTED_LUNS_RETURNED:
1c63dc66 2117 nvme_sc = nvme_identify_ctrl(ns->ctrl, &id_ctrl);
5d0f6131
VV		 2118 res = nvme_trans_status_code(hdr, nvme_sc);
2119 if (res)
d29ec824 2120 return res;
e61b0a86 2121
8741ee4c 2122 ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
5d0f6131
VV		 2123 resp_size = ll_length + LUN_DATA_HEADER_SIZE;
2124
3726897e 2125 alloc_len = get_unaligned_be32(&cmd[6]);
5d0f6131
VV		 2126 if (alloc_len < resp_size) {
2127 res = nvme_trans_completion(hdr,
2128 SAM_STAT_CHECK_CONDITION,
2129 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2130 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
d29ec824 2131 goto out_free_id;
5d0f6131
VV		 2132 }
2133
03ea83e9 2134 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2135 if (response == NULL) {
2136 res = -ENOMEM;
d29ec824 2137 goto out_free_id;
5d0f6131 2138 }
5d0f6131
VV		 2139
2140 /* The first LUN ID will always be 0 per the SAM spec */
8741ee4c 2141 for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
5d0f6131
VV		 2142 /*
2143 * Set the LUN Id and then increment to the next LUN
2144 * location in the parameter data.
2145 */
8741ee4c 2146 __be64 tmp_id = cpu_to_be64(lun_id);
5d0f6131
VV		 2147 memcpy(&response[lun_id_offset], &tmp_id, sizeof(u64));
2148 lun_id_offset += LUN_ENTRY_SIZE;
2149 }
2150 tmp_len = cpu_to_be32(ll_length);
2151 memcpy(response, &tmp_len, sizeof(u32));
2152 }
2153
2154 xfer_len = min(alloc_len, resp_size);
2155 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2156
2157 kfree(response);
d29ec824
CH		 2158 out_free_id:
2159 kfree(id_ctrl);
5d0f6131
VV		 2160 return res;
2161}
2162
2163static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2164 u8 *cmd)
2165{
e61b0a86 2166 int res;
5d0f6131
VV		 2167 u8 alloc_len, xfer_len, resp_size;
2168 u8 desc_format;
2169 u8 *response;
2170
3726897e
CH		 2171 desc_format = cmd[1] & 0x01;
2172 alloc_len = cmd[4];
5d0f6131
VV		 2173
2174 resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
2175 (FIXED_FMT_SENSE_DATA_SIZE));
03ea83e9 2176 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2177 if (response == NULL) {
2178 res = -ENOMEM;
2179 goto out;
2180 }
5d0f6131 2181
3726897e 2182 if (desc_format) {
5d0f6131
VV		 2183 /* Descriptor Format Sense Data */
2184 response[0] = DESC_FORMAT_SENSE_DATA;
2185 response[1] = NO_SENSE;
2186 /* TODO How is LOW POWER CONDITION ON handled? (byte 2) */
2187 response[2] = SCSI_ASC_NO_SENSE;
2188 response[3] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2189 /* SDAT_OVFL = 0 | Additional Sense Length = 0 */
2190 } else {
2191 /* Fixed Format Sense Data */
2192 response[0] = FIXED_SENSE_DATA;
2193 /* Byte 1 = Obsolete */
2194 response[2] = NO_SENSE; /* FM, EOM, ILI, SDAT_OVFL = 0 */
2195 /* Bytes 3-6 - Information - set to zero */
2196 response[7] = FIXED_SENSE_DATA_ADD_LENGTH;
2197 /* Bytes 8-11 - Cmd Specific Information - set to zero */
2198 response[12] = SCSI_ASC_NO_SENSE;
2199 response[13] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2200 /* Byte 14 = Field Replaceable Unit Code = 0 */
2201 /* Bytes 15-17 - SKSV=0; Sense Key Specific = 0 */
2202 }
2203
2204 xfer_len = min(alloc_len, resp_size);
2205 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2206
2207 kfree(response);
2208 out:
2209 return res;
2210}
2211
2212static int nvme_trans_security_protocol(struct nvme_ns *ns,
2213 struct sg_io_hdr *hdr,
2214 u8 *cmd)
2215{
2216 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2217 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2218 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2219}
2220
d29ec824
CH		 2221static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
2222 struct sg_io_hdr *hdr)
5d0f6131 2223{
5d0f6131 2224 int nvme_sc;
14385de1 2225 struct nvme_command c;
5d0f6131 2226
d29ec824
CH		 2227 memset(&c, 0, sizeof(c));
2228 c.common.opcode = nvme_cmd_flush;
2229 c.common.nsid = cpu_to_le32(ns->ns_id);
5d0f6131 2230
d29ec824
CH		 2231 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
2232 return nvme_trans_status_code(hdr, nvme_sc);
2233}
2234
2235static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2236 u8 *cmd)
2237{
5d0f6131
VV		 2238 u8 immed, pcmod, pc, no_flush, start;
2239
3726897e
CH		 2240 immed = cmd[1] & 0x01;
2241 pcmod = cmd[3] & 0x0f;
2242 pc = (cmd[4] & 0xf0) >> 4;
2243 no_flush = cmd[4] & 0x04;
2244 start = cmd[4] & 0x01;
5d0f6131
VV		 2245
2246 if (immed != 0) {
e61b0a86 2247 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2248 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2249 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2250 } else {
2251 if (no_flush == 0) {
2252 /* Issue NVME FLUSH command prior to START STOP UNIT */
d29ec824 2253 int res = nvme_trans_synchronize_cache(ns, hdr);
5d0f6131 2254 if (res)
e61b0a86 2255 return res;
5d0f6131
VV		 2256 }
2257 /* Setup the expected power state transition */
e61b0a86 2258 return nvme_trans_power_state(ns, hdr, pc, pcmod, start);
5d0f6131 2259 }
5d0f6131
VV		 2260}
2261
2262static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2263 u8 *cmd)
2264{
e61b0a86 2265 int res;
5d0f6131
VV		 2266 u8 parm_hdr_len = 0;
2267 u8 nvme_pf_code = 0;
2268 u8 format_prot_info, long_list, format_data;
2269
3726897e
CH		 2270 format_prot_info = (cmd[1] & 0xc0) >> 6;
2271 long_list = cmd[1] & 0x20;
2272 format_data = cmd[1] & 0x10;
5d0f6131
VV		 2273
2274 if (format_data != 0) {
2275 if (format_prot_info != 0) {
2276 if (long_list == 0)
2277 parm_hdr_len = FORMAT_UNIT_SHORT_PARM_LIST_LEN;
2278 else
2279 parm_hdr_len = FORMAT_UNIT_LONG_PARM_LIST_LEN;
2280 }
2281 } else if (format_data == 0 && format_prot_info != 0) {
2282 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2283 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2284 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2285 goto out;
2286 }
2287
2288 /* Get parm header from data-in/out buffer */
2289 /*
2290 * According to the translation spec, the only fields in the parameter
2291 * list we are concerned with are in the header. So allocate only that.
2292 */
2293 if (parm_hdr_len > 0) {
2294 res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,
2295 format_prot_info, &nvme_pf_code);
e61b0a86 2296 if (res)
5d0f6131
VV		 2297 goto out;
2298 }
2299
2300 /* Attempt to activate any previously downloaded firmware image */
b90c48d0 2301 res = nvme_trans_send_activate_fw_cmd(ns, hdr, 0);
5d0f6131
VV		 2302
2303 /* Determine Block size and count and send format command */
2304 res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
e61b0a86 2305 if (res)
5d0f6131
VV		 2306 goto out;
2307
2308 res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);
2309
2310 out:
2311 return res;
2312}
2313
2314static int nvme_trans_test_unit_ready(struct nvme_ns *ns,
2315 struct sg_io_hdr *hdr,
2316 u8 *cmd)
2317{
1c63dc66 2318 if (nvme_ctrl_ready(ns->ctrl))
e61b0a86 2319 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2320 NOT_READY, SCSI_ASC_LUN_NOT_READY,
2321 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2322 else
e61b0a86 2323 return nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
5d0f6131
VV		 2324}
2325
2326static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2327 u8 *cmd)
2328{
e61b0a86 2329 int res = 0;
5d0f6131
VV		 2330 u32 buffer_offset, parm_list_length;
2331 u8 buffer_id, mode;
2332
3726897e 2333 parm_list_length = get_unaligned_be24(&cmd[6]);
5d0f6131
VV		 2334 if (parm_list_length % BYTES_TO_DWORDS != 0) {
2335 /* NVMe expects Firmware file to be a whole number of DWORDS */
2336 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2337 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2338 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2339 goto out;
2340 }
3726897e 2341 buffer_id = cmd[2];
5d0f6131
VV		 2342 if (buffer_id > NVME_MAX_FIRMWARE_SLOT) {
2343 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2344 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2345 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2346 goto out;
2347 }
3726897e
CH		 2348 mode = cmd[1] & 0x1f;
2349 buffer_offset = get_unaligned_be24(&cmd[3]);
5d0f6131
VV		 2350
2351 switch (mode) {
2352 case DOWNLOAD_SAVE_ACTIVATE:
b90c48d0 2353 res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
5d0f6131
VV		 2354 parm_list_length, buffer_offset,
2355 buffer_id);
e61b0a86 2356 if (res)
5d0f6131 2357 goto out;
b90c48d0 2358 res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
5d0f6131
VV		 2359 break;
2360 case DOWNLOAD_SAVE_DEFER_ACTIVATE:
b90c48d0 2361 res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
5d0f6131
VV		 2362 parm_list_length, buffer_offset,
2363 buffer_id);
2364 break;
2365 case ACTIVATE_DEFERRED_MICROCODE:
b90c48d0 2366 res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
5d0f6131
VV		 2367 break;
2368 default:
2369 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2370 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2371 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2372 break;
2373 }
2374
2375 out:
2376 return res;
2377}
2378
ec503733
KB		 2379struct scsi_unmap_blk_desc {
2380 __be64 slba;
2381 __be32 nlb;
2382 u32 resv;
2383};
2384
2385struct scsi_unmap_parm_list {
2386 __be16 unmap_data_len;
2387 __be16 unmap_blk_desc_data_len;
2388 u32 resv;
2389 struct scsi_unmap_blk_desc desc[0];
2390};
2391
2392static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2393 u8 *cmd)
2394{
ec503733
KB		 2395 struct scsi_unmap_parm_list *plist;
2396 struct nvme_dsm_range *range;
ec503733 2397 struct nvme_command c;
51ef72bd 2398 int i, nvme_sc, res;
ec503733 2399 u16 ndesc, list_len;
ec503733 2400
3726897e 2401 list_len = get_unaligned_be16(&cmd[7]);
ec503733
KB		 2402 if (!list_len)
2403 return -EINVAL;
2404
2405 plist = kmalloc(list_len, GFP_KERNEL);
2406 if (!plist)
2407 return -ENOMEM;
2408
2409 res = nvme_trans_copy_from_user(hdr, plist, list_len);
e61b0a86 2410 if (res)
ec503733
KB		 2411 goto out;
2412
2413 ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
2414 if (!ndesc || ndesc > 256) {
2415 res = -EINVAL;
2416 goto out;
2417 }
2418
d29ec824 2419 range = kcalloc(ndesc, sizeof(*range), GFP_KERNEL);
51ef72bd
AL		 2420 if (!range) {
2421 res = -ENOMEM;
ec503733 2422 goto out;
51ef72bd 2423 }
ec503733
KB		 2424
2425 for (i = 0; i < ndesc; i++) {
2426 range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));
2427 range[i].slba = cpu_to_le64(be64_to_cpu(plist->desc[i].slba));
2428 range[i].cattr = 0;
2429 }
2430
2431 memset(&c, 0, sizeof(c));
2432 c.dsm.opcode = nvme_cmd_dsm;
2433 c.dsm.nsid = cpu_to_le32(ns->ns_id);
ec503733
KB		 2434 c.dsm.nr = cpu_to_le32(ndesc - 1);
2435 c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
2436
d29ec824
CH		 2437 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, range,
2438 ndesc * sizeof(*range));
ec503733
KB		 2439 res = nvme_trans_status_code(hdr, nvme_sc);
2440
d29ec824 2441 kfree(range);
ec503733
KB		 2442 out:
2443 kfree(plist);
2444 return res;
2445}
2446
5d0f6131
VV		 2447static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
2448{
2449 u8 cmd[BLK_MAX_CDB];
2450 int retcode;
2451 unsigned int opcode;
2452
2453 if (hdr->cmdp == NULL)
2454 return -EMSGSIZE;
2455 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
2456 return -EFAULT;
2457
695a4fe7
KB		 2458 /*
2459 * Prime the hdr with good status for scsi commands that don't require
2460 * an nvme command for translation.
2461 */
2462 retcode = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
2463 if (retcode)
2464 return retcode;
2465
5d0f6131
VV		 2466 opcode = cmd[0];
2467
2468 switch (opcode) {
2469 case READ_6:
2470 case READ_10:
2471 case READ_12:
2472 case READ_16:
2473 retcode = nvme_trans_io(ns, hdr, 0, cmd);
2474 break;
2475 case WRITE_6:
2476 case WRITE_10:
2477 case WRITE_12:
2478 case WRITE_16:
2479 retcode = nvme_trans_io(ns, hdr, 1, cmd);
2480 break;
2481 case INQUIRY:
2482 retcode = nvme_trans_inquiry(ns, hdr, cmd);
2483 break;
2484 case LOG_SENSE:
2485 retcode = nvme_trans_log_sense(ns, hdr, cmd);
2486 break;
2487 case MODE_SELECT:
2488 case MODE_SELECT_10:
2489 retcode = nvme_trans_mode_select(ns, hdr, cmd);
2490 break;
2491 case MODE_SENSE:
2492 case MODE_SENSE_10:
2493 retcode = nvme_trans_mode_sense(ns, hdr, cmd);
2494 break;
2495 case READ_CAPACITY:
3726897e 2496 retcode = nvme_trans_read_capacity(ns, hdr, cmd, 0);
5d0f6131 2497 break;
eb846d9f 2498 case SERVICE_ACTION_IN_16:
3726897e
CH		 2499 switch (cmd[1]) {
2500 case SAI_READ_CAPACITY_16:
2501 retcode = nvme_trans_read_capacity(ns, hdr, cmd, 1);
2502 break;
2503 default:
5d0f6131 2504 goto out;
3726897e 2505 }
5d0f6131
VV		 2506 break;
2507 case REPORT_LUNS:
2508 retcode = nvme_trans_report_luns(ns, hdr, cmd);
2509 break;
2510 case REQUEST_SENSE:
2511 retcode = nvme_trans_request_sense(ns, hdr, cmd);
2512 break;
2513 case SECURITY_PROTOCOL_IN:
2514 case SECURITY_PROTOCOL_OUT:
2515 retcode = nvme_trans_security_protocol(ns, hdr, cmd);
2516 break;
2517 case START_STOP:
2518 retcode = nvme_trans_start_stop(ns, hdr, cmd);
2519 break;
2520 case SYNCHRONIZE_CACHE:
d29ec824 2521 retcode = nvme_trans_synchronize_cache(ns, hdr);
5d0f6131
VV		 2522 break;
2523 case FORMAT_UNIT:
2524 retcode = nvme_trans_format_unit(ns, hdr, cmd);
2525 break;
2526 case TEST_UNIT_READY:
2527 retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);
2528 break;
2529 case WRITE_BUFFER:
2530 retcode = nvme_trans_write_buffer(ns, hdr, cmd);
2531 break;
ec503733
KB		 2532 case UNMAP:
2533 retcode = nvme_trans_unmap(ns, hdr, cmd);
2534 break;
5d0f6131
VV		 2535 default:
2536 out:
2537 retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2538 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2539 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2540 break;
2541 }
2542 return retcode;
2543}
2544
2545int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr)
2546{
2547 struct sg_io_hdr hdr;
2548 int retcode;
2549
2550 if (!capable(CAP_SYS_ADMIN))
2551 return -EACCES;
2552 if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))
2553 return -EFAULT;
2554 if (hdr.interface_id != 'S')
2555 return -EINVAL;
2556 if (hdr.cmd_len > BLK_MAX_CDB)
2557 return -EINVAL;
2558
e61b0a86
CH		 2559 /*
2560 * A positive return code means a NVMe status, which has been
2561 * translated to sense data.
2562 */
5d0f6131
VV		 2563 retcode = nvme_scsi_translate(ns, &hdr);
2564 if (retcode < 0)
2565 return retcode;
8741ee4c 2566 if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
5d0f6131 2567 return -EFAULT;
e61b0a86 2568 return 0;
5d0f6131
VV		 2569}
2570
2571int nvme_sg_get_version_num(int __user *ip)
2572{
2573 return put_user(sg_version_num, ip);
2574}
ubuntu-zesty-kernel mirror