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nvme: move nvme_setup_flush and nvme_setup_rw to common code
[mirror_ubuntu-artful-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,
1c63dc66 603 u8 *inq_response, int alloc_len, u32 vs)
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
1c63dc66 618 if (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;
1c63dc66 690 u32 vs;
bf7d3ebb 691
1c63dc66
CH		 692 res = ns->ctrl->ops->reg_read32(ns->ctrl, NVME_REG_VS, &vs);
693 if (res)
694 return res;
695
696 if (vs >= NVME_VS(1, 1)) {
697 res = nvme_fill_device_id_eui64(ns, hdr, resp, alloc_len, vs);
bf7d3ebb
CH		 698 if (res != -EOPNOTSUPP)
699 return res;
700 }
701
702 return nvme_fill_device_id_scsi_string(ns, hdr, resp, alloc_len);
5d0f6131
VV		 703}
704
705static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
706 int alloc_len)
707{
708 u8 *inq_response;
e61b0a86 709 int res;
5d0f6131 710 int nvme_sc;
1c63dc66 711 struct nvme_ctrl *ctrl = ns->ctrl;
5d0f6131
VV		 712 struct nvme_id_ctrl *id_ctrl;
713 struct nvme_id_ns *id_ns;
714 int xfer_len;
715 u8 microcode = 0x80;
716 u8 spt;
717 u8 spt_lut[8] = {0, 0, 2, 1, 4, 6, 5, 7};
718 u8 grd_chk, app_chk, ref_chk, protect;
719 u8 uask_sup = 0x20;
720 u8 v_sup;
721 u8 luiclr = 0x01;
722
723 inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 724 if (inq_response == NULL)
725 return -ENOMEM;
5d0f6131 726
1c63dc66 727 nvme_sc = nvme_identify_ns(ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 728 res = nvme_trans_status_code(hdr, nvme_sc);
729 if (res)
d29ec824
CH		 730 goto out_free_inq;
731
732 spt = spt_lut[id_ns->dpc & 0x07] << 3;
733 if (id_ns->dps)
734 protect = 0x01;
735 else
736 protect = 0;
737 kfree(id_ns);
e61b0a86 738
5d0f6131
VV		 739 grd_chk = protect << 2;
740 app_chk = protect << 1;
741 ref_chk = protect;
742
1c63dc66 743 nvme_sc = nvme_identify_ctrl(ctrl, &id_ctrl);
5d0f6131
VV		 744 res = nvme_trans_status_code(hdr, nvme_sc);
745 if (res)
d29ec824 746 goto out_free_inq;
e61b0a86 747
5d0f6131 748 v_sup = id_ctrl->vwc;
d29ec824 749 kfree(id_ctrl);
5d0f6131
VV		 750
751 memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
752 inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE; /* Page Code */
753 inq_response[2] = 0x00; /* Page Length MSB */
754 inq_response[3] = 0x3C; /* Page Length LSB */
755 inq_response[4] = microcode | spt | grd_chk | app_chk | ref_chk;
756 inq_response[5] = uask_sup;
757 inq_response[6] = v_sup;
758 inq_response[7] = luiclr;
759 inq_response[8] = 0;
760 inq_response[9] = 0;
761
762 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
763 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
764
d29ec824 765 out_free_inq:
5d0f6131 766 kfree(inq_response);
5d0f6131
VV		 767 return res;
768}
769
7f749d9c
KB		 770static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
771 u8 *inq_response, int alloc_len)
772{
9283b42e
KB		 773 __be32 max_sectors = cpu_to_be32(
774 nvme_block_nr(ns, queue_max_hw_sectors(ns->queue)));
7f749d9c
KB		 775 __be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
776 __be32 discard_desc_count = cpu_to_be32(0x100);
777
778 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
779 inq_response[1] = VPD_BLOCK_LIMITS;
780 inq_response[3] = 0x3c; /* Page Length */
781 memcpy(&inq_response[8], &max_sectors, sizeof(u32));
782 memcpy(&inq_response[20], &max_discard, sizeof(u32));
783
784 if (max_discard)
785 memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
786
787 return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
788}
789
5d0f6131
VV		 790static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
791 int alloc_len)
792{
793 u8 *inq_response;
e61b0a86 794 int res;
5d0f6131
VV		 795 int xfer_len;
796
03ea83e9 797 inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
5d0f6131
VV		 798 if (inq_response == NULL) {
799 res = -ENOMEM;
800 goto out_mem;
801 }
802
5d0f6131
VV		 803 inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE; /* Page Code */
804 inq_response[2] = 0x00; /* Page Length MSB */
805 inq_response[3] = 0x3C; /* Page Length LSB */
806 inq_response[4] = 0x00; /* Medium Rotation Rate MSB */
807 inq_response[5] = 0x01; /* Medium Rotation Rate LSB */
808 inq_response[6] = 0x00; /* Form Factor */
809
810 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
811 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
812
813 kfree(inq_response);
814 out_mem:
815 return res;
816}
817
818/* LOG SENSE Helper Functions */
819
820static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
821 int alloc_len)
822{
e61b0a86 823 int res;
5d0f6131
VV		 824 int xfer_len;
825 u8 *log_response;
826
03ea83e9 827 log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
5d0f6131
VV		 828 if (log_response == NULL) {
829 res = -ENOMEM;
830 goto out_mem;
831 }
5d0f6131
VV		 832
833 log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
834 /* Subpage=0x00, Page Length MSB=0 */
835 log_response[3] = SUPPORTED_LOG_PAGES_PAGE_LENGTH;
836 log_response[4] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
837 log_response[5] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
838 log_response[6] = LOG_PAGE_TEMPERATURE_PAGE;
839
840 xfer_len = min(alloc_len, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
841 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
842
843 kfree(log_response);
844 out_mem:
845 return res;
846}
847
848static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
849 struct sg_io_hdr *hdr, int alloc_len)
850{
e61b0a86 851 int res;
5d0f6131
VV		 852 int xfer_len;
853 u8 *log_response;
5d0f6131 854 struct nvme_smart_log *smart_log;
5d0f6131
VV		 855 u8 temp_c;
856 u16 temp_k;
857
03ea83e9 858 log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 859 if (log_response == NULL)
860 return -ENOMEM;
5d0f6131 861
1c63dc66 862 res = nvme_get_log_page(ns->ctrl, &smart_log);
d29ec824
CH		 863 if (res < 0)
864 goto out_free_response;
5d0f6131 865
5d0f6131
VV		 866 if (res != NVME_SC_SUCCESS) {
867 temp_c = LOG_TEMP_UNKNOWN;
868 } else {
5d0f6131
VV		 869 temp_k = (smart_log->temperature[1] << 8) +
870 (smart_log->temperature[0]);
871 temp_c = temp_k - KELVIN_TEMP_FACTOR;
872 }
d29ec824 873 kfree(smart_log);
5d0f6131
VV		 874
875 log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
876 /* Subpage=0x00, Page Length MSB=0 */
877 log_response[3] = REMAINING_INFO_EXCP_PAGE_LENGTH;
878 /* Informational Exceptions Log Parameter 1 Start */
879 /* Parameter Code=0x0000 bytes 4,5 */
880 log_response[6] = 0x23; /* DU=0, TSD=1, ETC=0, TMC=0, FMT_AND_LNK=11b */
881 log_response[7] = 0x04; /* PARAMETER LENGTH */
882 /* Add sense Code and qualifier = 0x00 each */
883 /* Use Temperature from NVMe Get Log Page, convert to C from K */
884 log_response[10] = temp_c;
885
886 xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
887 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
888
d29ec824 889 out_free_response:
5d0f6131 890 kfree(log_response);
5d0f6131
VV		 891 return res;
892}
893
894static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
895 int alloc_len)
896{
e61b0a86 897 int res;
5d0f6131
VV		 898 int xfer_len;
899 u8 *log_response;
5d0f6131 900 struct nvme_smart_log *smart_log;
5d0f6131
VV		 901 u32 feature_resp;
902 u8 temp_c_cur, temp_c_thresh;
903 u16 temp_k;
904
03ea83e9 905 log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
d29ec824
CH		 906 if (log_response == NULL)
907 return -ENOMEM;
5d0f6131 908
1c63dc66 909 res = nvme_get_log_page(ns->ctrl, &smart_log);
d29ec824
CH		 910 if (res < 0)
911 goto out_free_response;
5d0f6131 912
5d0f6131
VV		 913 if (res != NVME_SC_SUCCESS) {
914 temp_c_cur = LOG_TEMP_UNKNOWN;
915 } else {
5d0f6131
VV		 916 temp_k = (smart_log->temperature[1] << 8) +
917 (smart_log->temperature[0]);
918 temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
919 }
d29ec824 920 kfree(smart_log);
5d0f6131
VV		 921
922 /* Get Features for Temp Threshold */
1c63dc66 923 res = nvme_get_features(ns->ctrl, NVME_FEAT_TEMP_THRESH, 0, 0,
5d0f6131
VV		 924 &feature_resp);
925 if (res != NVME_SC_SUCCESS)
926 temp_c_thresh = LOG_TEMP_UNKNOWN;
927 else
928 temp_c_thresh = (feature_resp & 0xFFFF) - KELVIN_TEMP_FACTOR;
929
930 log_response[0] = LOG_PAGE_TEMPERATURE_PAGE;
931 /* Subpage=0x00, Page Length MSB=0 */
932 log_response[3] = REMAINING_TEMP_PAGE_LENGTH;
933 /* Temperature Log Parameter 1 (Temperature) Start */
934 /* Parameter Code = 0x0000 */
935 log_response[6] = 0x01; /* Format and Linking = 01b */
936 log_response[7] = 0x02; /* Parameter Length */
937 /* Use Temperature from NVMe Get Log Page, convert to C from K */
938 log_response[9] = temp_c_cur;
939 /* Temperature Log Parameter 2 (Reference Temperature) Start */
940 log_response[11] = 0x01; /* Parameter Code = 0x0001 */
941 log_response[12] = 0x01; /* Format and Linking = 01b */
942 log_response[13] = 0x02; /* Parameter Length */
943 /* Use Temperature Thresh from NVMe Get Log Page, convert to C from K */
944 log_response[15] = temp_c_thresh;
945
946 xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
947 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
948
d29ec824 949 out_free_response:
5d0f6131 950 kfree(log_response);
5d0f6131
VV		 951 return res;
952}
953
954/* MODE SENSE Helper Functions */
955
956static int nvme_trans_fill_mode_parm_hdr(u8 *resp, int len, u8 cdb10, u8 llbaa,
957 u16 mode_data_length, u16 blk_desc_len)
958{
959 /* Quick check to make sure I don't stomp on my own memory... */
960 if ((cdb10 && len < 8) || (!cdb10 && len < 4))
e61b0a86 961 return -EINVAL;
5d0f6131
VV		 962
963 if (cdb10) {
964 resp[0] = (mode_data_length & 0xFF00) >> 8;
965 resp[1] = (mode_data_length & 0x00FF);
90851768 966 resp[3] = 0x10 /* DPOFUA */;
5d0f6131
VV		 967 resp[4] = llbaa;
968 resp[5] = RESERVED_FIELD;
969 resp[6] = (blk_desc_len & 0xFF00) >> 8;
970 resp[7] = (blk_desc_len & 0x00FF);
971 } else {
972 resp[0] = (mode_data_length & 0x00FF);
90851768 973 resp[2] = 0x10 /* DPOFUA */;
5d0f6131
VV		 974 resp[3] = (blk_desc_len & 0x00FF);
975 }
976
e61b0a86 977 return 0;
5d0f6131
VV		 978}
979
980static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
981 u8 *resp, int len, u8 llbaa)
982{
e61b0a86 983 int res;
5d0f6131 984 int nvme_sc;
5d0f6131
VV		 985 struct nvme_id_ns *id_ns;
986 u8 flbas;
987 u32 lba_length;
988
989 if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
e61b0a86 990 return -EINVAL;
5d0f6131 991 else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
e61b0a86 992 return -EINVAL;
5d0f6131 993
1c63dc66 994 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 995 res = nvme_trans_status_code(hdr, nvme_sc);
996 if (res)
d29ec824 997 return res;
e61b0a86 998
5d0f6131
VV		 999 flbas = (id_ns->flbas) & 0x0F;
1000 lba_length = (1 << (id_ns->lbaf[flbas].ds));
1001
1002 if (llbaa == 0) {
8741ee4c 1003 __be32 tmp_cap = cpu_to_be32(le64_to_cpu(id_ns->ncap));
5d0f6131 1004 /* Byte 4 is reserved */
8741ee4c 1005 __be32 tmp_len = cpu_to_be32(lba_length & 0x00FFFFFF);
5d0f6131
VV		 1006
1007 memcpy(resp, &tmp_cap, sizeof(u32));
1008 memcpy(&resp[4], &tmp_len, sizeof(u32));
1009 } else {
8741ee4c
VV		 1010 __be64 tmp_cap = cpu_to_be64(le64_to_cpu(id_ns->ncap));
1011 __be32 tmp_len = cpu_to_be32(lba_length);
5d0f6131
VV		 1012
1013 memcpy(resp, &tmp_cap, sizeof(u64));
1014 /* Bytes 8, 9, 10, 11 are reserved */
1015 memcpy(&resp[12], &tmp_len, sizeof(u32));
1016 }
1017
d29ec824 1018 kfree(id_ns);
5d0f6131
VV		 1019 return res;
1020}
1021
1022static int nvme_trans_fill_control_page(struct nvme_ns *ns,
1023 struct sg_io_hdr *hdr, u8 *resp,
1024 int len)
1025{
1026 if (len < MODE_PAGE_CONTROL_LEN)
e61b0a86 1027 return -EINVAL;
5d0f6131
VV		 1028
1029 resp[0] = MODE_PAGE_CONTROL;
1030 resp[1] = MODE_PAGE_CONTROL_LEN_FIELD;
1031 resp[2] = 0x0E; /* TST=000b, TMF_ONLY=0, DPICZ=1,
1032 * D_SENSE=1, GLTSD=1, RLEC=0 */
1033 resp[3] = 0x12; /* Q_ALGO_MODIFIER=1h, NUAR=0, QERR=01b */
1034 /* Byte 4: VS=0, RAC=0, UA_INT=0, SWP=0 */
1035 resp[5] = 0x40; /* ATO=0, TAS=1, ATMPE=0, RWWP=0, AUTOLOAD=0 */
1036 /* resp[6] and [7] are obsolete, thus zero */
1037 resp[8] = 0xFF; /* Busy timeout period = 0xffff */
1038 resp[9] = 0xFF;
1039 /* Bytes 10,11: Extended selftest completion time = 0x0000 */
1040
e61b0a86 1041 return 0;
5d0f6131
VV		 1042}
1043
1044static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
1045 struct sg_io_hdr *hdr,
1046 u8 *resp, int len)
1047{
e61b0a86 1048 int res = 0;
5d0f6131 1049 int nvme_sc;
5d0f6131
VV		 1050 u32 feature_resp;
1051 u8 vwc;
1052
1053 if (len < MODE_PAGE_CACHING_LEN)
e61b0a86 1054 return -EINVAL;
5d0f6131 1055
1c63dc66 1056 nvme_sc = nvme_get_features(ns->ctrl, NVME_FEAT_VOLATILE_WC, 0, 0,
5d0f6131
VV		 1057 &feature_resp);
1058 res = nvme_trans_status_code(hdr, nvme_sc);
1059 if (res)
e61b0a86
CH		 1060 return res;
1061
5d0f6131
VV		 1062 vwc = feature_resp & 0x00000001;
1063
1064 resp[0] = MODE_PAGE_CACHING;
1065 resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
1066 resp[2] = vwc << 2;
e61b0a86 1067 return 0;
5d0f6131
VV		 1068}
1069
1070static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
1071 struct sg_io_hdr *hdr, u8 *resp,
1072 int len)
1073{
5d0f6131 1074 if (len < MODE_PAGE_POW_CND_LEN)
e61b0a86 1075 return -EINVAL;
5d0f6131
VV		 1076
1077 resp[0] = MODE_PAGE_POWER_CONDITION;
1078 resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
1079 /* All other bytes are zero */
1080
e61b0a86 1081 return 0;
5d0f6131
VV		 1082}
1083
1084static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
1085 struct sg_io_hdr *hdr, u8 *resp,
1086 int len)
1087{
5d0f6131 1088 if (len < MODE_PAGE_INF_EXC_LEN)
e61b0a86 1089 return -EINVAL;
5d0f6131
VV		 1090
1091 resp[0] = MODE_PAGE_INFO_EXCEP;
1092 resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
1093 resp[2] = 0x88;
1094 /* All other bytes are zero */
1095
e61b0a86 1096 return 0;
5d0f6131
VV		 1097}
1098
1099static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1100 u8 *resp, int len)
1101{
e61b0a86 1102 int res;
5d0f6131
VV		 1103 u16 mode_pages_offset_1 = 0;
1104 u16 mode_pages_offset_2, mode_pages_offset_3, mode_pages_offset_4;
1105
1106 mode_pages_offset_2 = mode_pages_offset_1 + MODE_PAGE_CACHING_LEN;
1107 mode_pages_offset_3 = mode_pages_offset_2 + MODE_PAGE_CONTROL_LEN;
1108 mode_pages_offset_4 = mode_pages_offset_3 + MODE_PAGE_POW_CND_LEN;
1109
1110 res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],
1111 MODE_PAGE_CACHING_LEN);
e61b0a86
CH		 1112 if (res)
1113 return res;
5d0f6131
VV		 1114 res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
1115 MODE_PAGE_CONTROL_LEN);
e61b0a86
CH		 1116 if (res)
1117 return res;
5d0f6131
VV		 1118 res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
1119 MODE_PAGE_POW_CND_LEN);
e61b0a86
CH		 1120 if (res)
1121 return res;
1122 return nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
5d0f6131 1123 MODE_PAGE_INF_EXC_LEN);
5d0f6131
VV		 1124}
1125
1126static inline int nvme_trans_get_blk_desc_len(u8 dbd, u8 llbaa)
1127{
1128 if (dbd == MODE_SENSE_BLK_DESC_ENABLED) {
1129 /* SPC-4: len = 8 x Num_of_descriptors if llbaa = 0, 16x if 1 */
1130 return 8 * (llbaa + 1) * MODE_SENSE_BLK_DESC_COUNT;
1131 } else {
1132 return 0;
1133 }
1134}
1135
1136static int nvme_trans_mode_page_create(struct nvme_ns *ns,
1137 struct sg_io_hdr *hdr, u8 *cmd,
1138 u16 alloc_len, u8 cdb10,
1139 int (*mode_page_fill_func)
1140 (struct nvme_ns *,
1141 struct sg_io_hdr *hdr, u8 *, int),
1142 u16 mode_pages_tot_len)
1143{
e61b0a86 1144 int res;
5d0f6131
VV		 1145 int xfer_len;
1146 u8 *response;
1147 u8 dbd, llbaa;
1148 u16 resp_size;
1149 int mph_size;
1150 u16 mode_pages_offset_1;
1151 u16 blk_desc_len, blk_desc_offset, mode_data_length;
1152
3726897e
CH		 1153 dbd = (cmd[1] & MODE_SENSE_DBD_MASK) >> MODE_SENSE_DBD_SHIFT;
1154 llbaa = (cmd[1] & MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT;
1155 mph_size = cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE;
1156
5d0f6131
VV		 1157 blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa);
1158
1159 resp_size = mph_size + blk_desc_len + mode_pages_tot_len;
1160 /* Refer spc4r34 Table 440 for calculation of Mode data Length field */
1161 mode_data_length = 3 + (3 * cdb10) + blk_desc_len + mode_pages_tot_len;
1162
1163 blk_desc_offset = mph_size;
1164 mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
1165
03ea83e9 1166 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 1167 if (response == NULL) {
1168 res = -ENOMEM;
1169 goto out_mem;
1170 }
5d0f6131
VV		 1171
1172 res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
1173 llbaa, mode_data_length, blk_desc_len);
e61b0a86 1174 if (res)
5d0f6131
VV		 1175 goto out_free;
1176 if (blk_desc_len > 0) {
1177 res = nvme_trans_fill_blk_desc(ns, hdr,
1178 &response[blk_desc_offset],
1179 blk_desc_len, llbaa);
e61b0a86 1180 if (res)
5d0f6131
VV		 1181 goto out_free;
1182 }
1183 res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
1184 mode_pages_tot_len);
e61b0a86 1185 if (res)
5d0f6131
VV		 1186 goto out_free;
1187
1188 xfer_len = min(alloc_len, resp_size);
1189 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
1190
1191 out_free:
1192 kfree(response);
1193 out_mem:
1194 return res;
1195}
1196
1197/* Read Capacity Helper Functions */
1198
1199static void nvme_trans_fill_read_cap(u8 *response, struct nvme_id_ns *id_ns,
1200 u8 cdb16)
1201{
1202 u8 flbas;
1203 u32 lba_length;
1204 u64 rlba;
1205 u8 prot_en;
1206 u8 p_type_lut[4] = {0, 0, 1, 2};
8741ee4c
VV		 1207 __be64 tmp_rlba;
1208 __be32 tmp_rlba_32;
1209 __be32 tmp_len;
5d0f6131
VV		 1210
1211 flbas = (id_ns->flbas) & 0x0F;
1212 lba_length = (1 << (id_ns->lbaf[flbas].ds));
1213 rlba = le64_to_cpup(&id_ns->nsze) - 1;
1214 (id_ns->dps) ? (prot_en = 0x01) : (prot_en = 0);
1215
1216 if (!cdb16) {
1217 if (rlba > 0xFFFFFFFF)
1218 rlba = 0xFFFFFFFF;
1219 tmp_rlba_32 = cpu_to_be32(rlba);
1220 tmp_len = cpu_to_be32(lba_length);
1221 memcpy(response, &tmp_rlba_32, sizeof(u32));
1222 memcpy(&response[4], &tmp_len, sizeof(u32));
1223 } else {
1224 tmp_rlba = cpu_to_be64(rlba);
1225 tmp_len = cpu_to_be32(lba_length);
1226 memcpy(response, &tmp_rlba, sizeof(u64));
1227 memcpy(&response[8], &tmp_len, sizeof(u32));
1228 response[12] = (p_type_lut[id_ns->dps & 0x3] << 1) | prot_en;
1229 /* P_I_Exponent = 0x0 | LBPPBE = 0x0 */
1230 /* LBPME = 0 | LBPRZ = 0 | LALBA = 0x00 */
1231 /* Bytes 16-31 - Reserved */
1232 }
1233}
1234
1235/* Start Stop Unit Helper Functions */
1236
1237static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1238 u8 pc, u8 pcmod, u8 start)
1239{
e61b0a86 1240 int res;
5d0f6131 1241 int nvme_sc;
5d0f6131
VV		 1242 struct nvme_id_ctrl *id_ctrl;
1243 int lowest_pow_st; /* max npss = lowest power consumption */
1244 unsigned ps_desired = 0;
1245
1c63dc66 1246 nvme_sc = nvme_identify_ctrl(ns->ctrl, &id_ctrl);
5d0f6131
VV		 1247 res = nvme_trans_status_code(hdr, nvme_sc);
1248 if (res)
d29ec824 1249 return res;
e61b0a86 1250
b8e08084 1251 lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
d29ec824 1252 kfree(id_ctrl);
5d0f6131
VV		 1253
1254 switch (pc) {
1255 case NVME_POWER_STATE_START_VALID:
1256 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1257 if (pcmod == 0 && start == 0x1)
1258 ps_desired = POWER_STATE_0;
1259 if (pcmod == 0 && start == 0x0)
1260 ps_desired = lowest_pow_st;
1261 break;
1262 case NVME_POWER_STATE_ACTIVE:
1263 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1264 if (pcmod == 0)
1265 ps_desired = POWER_STATE_0;
1266 break;
1267 case NVME_POWER_STATE_IDLE:
1268 /* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
5d0f6131 1269 if (pcmod == 0x0)
b8e08084 1270 ps_desired = POWER_STATE_1;
5d0f6131 1271 else if (pcmod == 0x1)
b8e08084 1272 ps_desired = POWER_STATE_2;
5d0f6131 1273 else if (pcmod == 0x2)
b8e08084 1274 ps_desired = POWER_STATE_3;
5d0f6131
VV		 1275 break;
1276 case NVME_POWER_STATE_STANDBY:
1277 /* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
1278 if (pcmod == 0x0)
b8e08084 1279 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 2));
5d0f6131 1280 else if (pcmod == 0x1)
b8e08084 1281 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 1));
5d0f6131
VV		 1282 break;
1283 case NVME_POWER_STATE_LU_CONTROL:
1284 default:
1285 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1286 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1287 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1288 break;
1289 }
1c63dc66 1290 nvme_sc = nvme_set_features(ns->ctrl, NVME_FEAT_POWER_MGMT, ps_desired, 0,
5d0f6131 1291 NULL);
d29ec824 1292 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1293}
1294
b90c48d0
CH		 1295static int nvme_trans_send_activate_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1296 u8 buffer_id)
1297{
1298 struct nvme_command c;
1299 int nvme_sc;
5d0f6131 1300
b90c48d0
CH		 1301 memset(&c, 0, sizeof(c));
1302 c.common.opcode = nvme_admin_activate_fw;
1303 c.common.cdw10[0] = cpu_to_le32(buffer_id | NVME_FWACT_REPL_ACTV);
1304
d29ec824 1305 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
e61b0a86 1306 return nvme_trans_status_code(hdr, nvme_sc);
b90c48d0 1307}
5d0f6131 1308
b90c48d0 1309static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
5d0f6131
VV		 1310 u8 opcode, u32 tot_len, u32 offset,
1311 u8 buffer_id)
1312{
5d0f6131 1313 int nvme_sc;
5d0f6131 1314 struct nvme_command c;
5d0f6131 1315
b90c48d0
CH		 1316 if (hdr->iovec_count > 0) {
1317 /* Assuming SGL is not allowed for this command */
1318 return nvme_trans_completion(hdr,
1319 SAM_STAT_CHECK_CONDITION,
1320 ILLEGAL_REQUEST,
1321 SCSI_ASC_INVALID_CDB,
1322 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1323 }
1324
d29ec824
CH		 1325 memset(&c, 0, sizeof(c));
1326 c.common.opcode = nvme_admin_download_fw;
b90c48d0
CH		 1327 c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
1328 c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
1329
1c63dc66 1330 nvme_sc = __nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, NULL,
d29ec824
CH		 1331 hdr->dxferp, tot_len, NULL, 0);
1332 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1333}
1334
1335/* Mode Select Helper Functions */
1336
1337static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10,
1338 u16 *bd_len, u8 *llbaa)
1339{
1340 if (cdb10) {
1341 /* 10 Byte CDB */
1342 *bd_len = (parm_list[MODE_SELECT_10_BD_OFFSET] << 8) +
1343 parm_list[MODE_SELECT_10_BD_OFFSET + 1];
9ac16938 1344 *llbaa = parm_list[MODE_SELECT_10_LLBAA_OFFSET] &
5d0f6131
VV		 1345 MODE_SELECT_10_LLBAA_MASK;
1346 } else {
1347 /* 6 Byte CDB */
1348 *bd_len = parm_list[MODE_SELECT_6_BD_OFFSET];
1349 }
1350}
1351
1352static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list,
1353 u16 idx, u16 bd_len, u8 llbaa)
1354{
1355 u16 bd_num;
1356
1357 bd_num = bd_len / ((llbaa == 0) ?
1358 SHORT_DESC_BLOCK : LONG_DESC_BLOCK);
1359 /* Store block descriptor info if a FORMAT UNIT comes later */
1360 /* TODO Saving 1st BD info; what to do if multiple BD received? */
1361 if (llbaa == 0) {
1362 /* Standard Block Descriptor - spc4r34 7.5.5.1 */
1363 ns->mode_select_num_blocks =
1364 (parm_list[idx + 1] << 16) +
1365 (parm_list[idx + 2] << 8) +
1366 (parm_list[idx + 3]);
1367
1368 ns->mode_select_block_len =
1369 (parm_list[idx + 5] << 16) +
1370 (parm_list[idx + 6] << 8) +
1371 (parm_list[idx + 7]);
1372 } else {
1373 /* Long LBA Block Descriptor - sbc3r27 6.4.2.3 */
1374 ns->mode_select_num_blocks =
1375 (((u64)parm_list[idx + 0]) << 56) +
1376 (((u64)parm_list[idx + 1]) << 48) +
1377 (((u64)parm_list[idx + 2]) << 40) +
1378 (((u64)parm_list[idx + 3]) << 32) +
1379 (((u64)parm_list[idx + 4]) << 24) +
1380 (((u64)parm_list[idx + 5]) << 16) +
1381 (((u64)parm_list[idx + 6]) << 8) +
1382 ((u64)parm_list[idx + 7]);
1383
1384 ns->mode_select_block_len =
1385 (parm_list[idx + 12] << 24) +
1386 (parm_list[idx + 13] << 16) +
1387 (parm_list[idx + 14] << 8) +
1388 (parm_list[idx + 15]);
1389 }
1390}
1391
710a143d 1392static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,
5d0f6131
VV		 1393 u8 *mode_page, u8 page_code)
1394{
e61b0a86 1395 int res = 0;
5d0f6131 1396 int nvme_sc;
5d0f6131
VV		 1397 unsigned dword11;
1398
1399 switch (page_code) {
1400 case MODE_PAGE_CACHING:
1401 dword11 = ((mode_page[2] & CACHING_MODE_PAGE_WCE_MASK) ? 1 : 0);
1c63dc66
CH		 1402 nvme_sc = nvme_set_features(ns->ctrl, NVME_FEAT_VOLATILE_WC,
1403 dword11, 0, NULL);
5d0f6131 1404 res = nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1405 break;
1406 case MODE_PAGE_CONTROL:
1407 break;
1408 case MODE_PAGE_POWER_CONDITION:
1409 /* Verify the OS is not trying to set timers */
1410 if ((mode_page[2] & 0x01) != 0 || (mode_page[3] & 0x0F) != 0) {
1411 res = nvme_trans_completion(hdr,
1412 SAM_STAT_CHECK_CONDITION,
1413 ILLEGAL_REQUEST,
1414 SCSI_ASC_INVALID_PARAMETER,
1415 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1416 break;
1417 }
1418 break;
1419 default:
1420 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1421 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1422 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
5d0f6131
VV		 1423 break;
1424 }
1425
1426 return res;
1427}
1428
1429static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1430 u8 *cmd, u16 parm_list_len, u8 pf,
1431 u8 sp, u8 cdb10)
1432{
e61b0a86 1433 int res;
5d0f6131
VV		 1434 u8 *parm_list;
1435 u16 bd_len;
1436 u8 llbaa = 0;
1437 u16 index, saved_index;
1438 u8 page_code;
1439 u16 mp_size;
1440
1441 /* Get parm list from data-in/out buffer */
1442 parm_list = kmalloc(parm_list_len, GFP_KERNEL);
1443 if (parm_list == NULL) {
1444 res = -ENOMEM;
1445 goto out;
1446 }
1447
1448 res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);
e61b0a86 1449 if (res)
5d0f6131
VV		 1450 goto out_mem;
1451
1452 nvme_trans_modesel_get_bd_len(parm_list, cdb10, &bd_len, &llbaa);
1453 index = (cdb10) ? (MODE_SELECT_10_MPH_SIZE) : (MODE_SELECT_6_MPH_SIZE);
1454
1455 if (bd_len != 0) {
1456 /* Block Descriptors present, parse */
1457 nvme_trans_modesel_save_bd(ns, parm_list, index, bd_len, llbaa);
1458 index += bd_len;
1459 }
1460 saved_index = index;
1461
1462 /* Multiple mode pages may be present; iterate through all */
1463 /* In 1st Iteration, don't do NVME Command, only check for CDB errors */
1464 do {
1465 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1466 mp_size = parm_list[index + 1] + 2;
1467 if ((page_code != MODE_PAGE_CACHING) &&
1468 (page_code != MODE_PAGE_CONTROL) &&
1469 (page_code != MODE_PAGE_POWER_CONDITION)) {
1470 res = nvme_trans_completion(hdr,
1471 SAM_STAT_CHECK_CONDITION,
1472 ILLEGAL_REQUEST,
1473 SCSI_ASC_INVALID_CDB,
1474 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1475 goto out_mem;
1476 }
1477 index += mp_size;
1478 } while (index < parm_list_len);
1479
1480 /* In 2nd Iteration, do the NVME Commands */
1481 index = saved_index;
1482 do {
1483 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1484 mp_size = parm_list[index + 1] + 2;
1485 res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],
1486 page_code);
e61b0a86 1487 if (res)
5d0f6131
VV		 1488 break;
1489 index += mp_size;
1490 } while (index < parm_list_len);
1491
1492 out_mem:
1493 kfree(parm_list);
1494 out:
1495 return res;
1496}
1497
1498/* Format Unit Helper Functions */
1499
1500static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
1501 struct sg_io_hdr *hdr)
1502{
e61b0a86 1503 int res = 0;
5d0f6131 1504 int nvme_sc;
5d0f6131
VV		 1505 u8 flbas;
1506
1507 /*
1508 * SCSI Expects a MODE SELECT would have been issued prior to
1509 * a FORMAT UNIT, and the block size and number would be used
1510 * from the block descriptor in it. If a MODE SELECT had not
1511 * been issued, FORMAT shall use the current values for both.
1512 */
1513
1514 if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
d29ec824
CH		 1515 struct nvme_id_ns *id_ns;
1516
1c63dc66 1517 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 1518 res = nvme_trans_status_code(hdr, nvme_sc);
1519 if (res)
d29ec824 1520 return res;
5d0f6131
VV		 1521
1522 if (ns->mode_select_num_blocks == 0)
8741ee4c 1523 ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
5d0f6131
VV		 1524 if (ns->mode_select_block_len == 0) {
1525 flbas = (id_ns->flbas) & 0x0F;
1526 ns->mode_select_block_len =
1527 (1 << (id_ns->lbaf[flbas].ds));
1528 }
d29ec824
CH		 1529
1530 kfree(id_ns);
5d0f6131 1531 }
d29ec824
CH		 1532
1533 return 0;
5d0f6131
VV		 1534}
1535
1536static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
1537 u8 format_prot_info, u8 *nvme_pf_code)
1538{
e61b0a86 1539 int res;
5d0f6131
VV		 1540 u8 *parm_list;
1541 u8 pf_usage, pf_code;
1542
1543 parm_list = kmalloc(len, GFP_KERNEL);
1544 if (parm_list == NULL) {
1545 res = -ENOMEM;
1546 goto out;
1547 }
1548 res = nvme_trans_copy_from_user(hdr, parm_list, len);
e61b0a86 1549 if (res)
5d0f6131
VV		 1550 goto out_mem;
1551
1552 if ((parm_list[FORMAT_UNIT_IMMED_OFFSET] &
1553 FORMAT_UNIT_IMMED_MASK) != 0) {
1554 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1555 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1556 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1557 goto out_mem;
1558 }
1559
1560 if (len == FORMAT_UNIT_LONG_PARM_LIST_LEN &&
1561 (parm_list[FORMAT_UNIT_PROT_INT_OFFSET] & 0x0F) != 0) {
1562 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1563 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1564 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1565 goto out_mem;
1566 }
1567 pf_usage = parm_list[FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET] &
1568 FORMAT_UNIT_PROT_FIELD_USAGE_MASK;
1569 pf_code = (pf_usage << 2) | format_prot_info;
1570 switch (pf_code) {
1571 case 0:
1572 *nvme_pf_code = 0;
1573 break;
1574 case 2:
1575 *nvme_pf_code = 1;
1576 break;
1577 case 3:
1578 *nvme_pf_code = 2;
1579 break;
1580 case 7:
1581 *nvme_pf_code = 3;
1582 break;
1583 default:
1584 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1585 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1586 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1587 break;
1588 }
1589
1590 out_mem:
1591 kfree(parm_list);
1592 out:
1593 return res;
1594}
1595
1596static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1597 u8 prot_info)
1598{
e61b0a86 1599 int res;
5d0f6131 1600 int nvme_sc;
5d0f6131
VV		 1601 struct nvme_id_ns *id_ns;
1602 u8 i;
1603 u8 flbas, nlbaf;
1604 u8 selected_lbaf = 0xFF;
1605 u32 cdw10 = 0;
1606 struct nvme_command c;
1607
1608 /* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
1c63dc66 1609 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 1610 res = nvme_trans_status_code(hdr, nvme_sc);
1611 if (res)
d29ec824 1612 return res;
e61b0a86 1613
5d0f6131
VV		 1614 flbas = (id_ns->flbas) & 0x0F;
1615 nlbaf = id_ns->nlbaf;
1616
1617 for (i = 0; i < nlbaf; i++) {
1618 if (ns->mode_select_block_len == (1 << (id_ns->lbaf[i].ds))) {
1619 selected_lbaf = i;
1620 break;
1621 }
1622 }
1623 if (selected_lbaf > 0x0F) {
1624 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1625 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1626 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1627 }
8741ee4c 1628 if (ns->mode_select_num_blocks != le64_to_cpu(id_ns->ncap)) {
5d0f6131
VV		 1629 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1630 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1631 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1632 }
1633
1634 cdw10 |= prot_info << 5;
1635 cdw10 |= selected_lbaf & 0x0F;
1636 memset(&c, 0, sizeof(c));
1637 c.format.opcode = nvme_admin_format_nvm;
8741ee4c 1638 c.format.nsid = cpu_to_le32(ns->ns_id);
5d0f6131
VV		 1639 c.format.cdw10 = cpu_to_le32(cdw10);
1640
1c63dc66 1641 nvme_sc = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, NULL, 0);
5d0f6131 1642 res = nvme_trans_status_code(hdr, nvme_sc);
5d0f6131 1643
d29ec824 1644 kfree(id_ns);
5d0f6131
VV		 1645 return res;
1646}
1647
5d0f6131
VV		 1648static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,
1649 struct nvme_trans_io_cdb *cdb_info,
1650 u32 max_blocks)
1651{
1652 /* If using iovecs, send one nvme command per vector */
1653 if (hdr->iovec_count > 0)
1654 return hdr->iovec_count;
1655 else if (cdb_info->xfer_len > max_blocks)
1656 return ((cdb_info->xfer_len - 1) / max_blocks) + 1;
1657 else
1658 return 1;
1659}
1660
1661static u16 nvme_trans_io_get_control(struct nvme_ns *ns,
1662 struct nvme_trans_io_cdb *cdb_info)
1663{
1664 u16 control = 0;
1665
1666 /* When Protection information support is added, implement here */
1667
1668 if (cdb_info->fua > 0)
1669 control |= NVME_RW_FUA;
1670
1671 return control;
1672}
1673
1674static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1675 struct nvme_trans_io_cdb *cdb_info, u8 is_write)
1676{
e61b0a86 1677 int nvme_sc = NVME_SC_SUCCESS;
5d0f6131 1678 u32 num_cmds;
5d0f6131
VV		 1679 u64 unit_len;
1680 u64 unit_num_blocks; /* Number of blocks to xfer in each nvme cmd */
1681 u32 retcode;
1682 u32 i = 0;
1683 u64 nvme_offset = 0;
8741ee4c 1684 void __user *next_mapping_addr;
5d0f6131
VV		 1685 struct nvme_command c;
1686 u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
1687 u16 control;
ddcb7762 1688 u32 max_blocks = queue_max_hw_sectors(ns->queue);
5d0f6131
VV		 1689
1690 num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
1691
1692 /*
1693 * This loop handles two cases.
1694 * First, when an SGL is used in the form of an iovec list:
1695 * - Use iov_base as the next mapping address for the nvme command_id
1696 * - Use iov_len as the data transfer length for the command.
1697 * Second, when we have a single buffer
1698 * - If larger than max_blocks, split into chunks, offset
1699 * each nvme command accordingly.
1700 */
1701 for (i = 0; i < num_cmds; i++) {
1702 memset(&c, 0, sizeof(c));
1703 if (hdr->iovec_count > 0) {
8741ee4c
VV		 1704 struct sg_iovec sgl;
1705
1706 retcode = copy_from_user(&sgl, hdr->dxferp +
1707 i * sizeof(struct sg_iovec),
1708 sizeof(struct sg_iovec));
1709 if (retcode)
1710 return -EFAULT;
1711 unit_len = sgl.iov_len;
5d0f6131 1712 unit_num_blocks = unit_len >> ns->lba_shift;
8741ee4c 1713 next_mapping_addr = sgl.iov_base;
5d0f6131
VV		 1714 } else {
1715 unit_num_blocks = min((u64)max_blocks,
1716 (cdb_info->xfer_len - nvme_offset));
1717 unit_len = unit_num_blocks << ns->lba_shift;
1718 next_mapping_addr = hdr->dxferp +
1719 ((1 << ns->lba_shift) * nvme_offset);
1720 }
1721
1722 c.rw.opcode = opcode;
1723 c.rw.nsid = cpu_to_le32(ns->ns_id);
1724 c.rw.slba = cpu_to_le64(cdb_info->lba + nvme_offset);
1725 c.rw.length = cpu_to_le16(unit_num_blocks - 1);
1726 control = nvme_trans_io_get_control(ns, cdb_info);
1727 c.rw.control = cpu_to_le16(control);
1728
d29ec824
CH		 1729 if (get_capacity(ns->disk) - unit_num_blocks <
1730 cdb_info->lba + nvme_offset) {
1731 nvme_sc = NVME_SC_LBA_RANGE;
1732 break;
5d0f6131 1733 }
d29ec824
CH		 1734 nvme_sc = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
1735 next_mapping_addr, unit_len, NULL, 0);
1736 if (nvme_sc)
1737 break;
5d0f6131
VV		 1738
1739 nvme_offset += unit_num_blocks;
5d0f6131 1740 }
5d0f6131 1741
e61b0a86 1742 return nvme_trans_status_code(hdr, nvme_sc);
5d0f6131
VV		 1743}
1744
1745
1746/* SCSI Command Translation Functions */
1747
1748static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,
1749 u8 *cmd)
1750{
e61b0a86 1751 int res = 0;
cbbb7a2e 1752 struct nvme_trans_io_cdb cdb_info = { 0, };
5d0f6131
VV		 1753 u8 opcode = cmd[0];
1754 u64 xfer_bytes;
1755 u64 sum_iov_len = 0;
8741ee4c 1756 struct sg_iovec sgl;
5d0f6131 1757 int i;
8741ee4c 1758 size_t not_copied;
5d0f6131 1759
cbbb7a2e
CH		 1760 /*
1761 * The FUA and WPROTECT fields are not supported in 6-byte CDBs,
1762 * but always in the same place for all others.
1763 */
1764 switch (opcode) {
1765 case WRITE_6:
1766 case READ_6:
1767 break;
1768 default:
1769 cdb_info.fua = cmd[1] & 0x8;
1770 cdb_info.prot_info = (cmd[1] & 0xe0) >> 5;
772ce435
CH		 1771 if (cdb_info.prot_info && !ns->pi_type) {
1772 return nvme_trans_completion(hdr,
1773 SAM_STAT_CHECK_CONDITION,
1774 ILLEGAL_REQUEST,
1775 SCSI_ASC_INVALID_CDB,
1776 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1777 }
cbbb7a2e
CH		 1778 }
1779
5d0f6131
VV		 1780 switch (opcode) {
1781 case WRITE_6:
1782 case READ_6:
cbbb7a2e
CH		 1783 cdb_info.lba = get_unaligned_be24(&cmd[1]);
1784 cdb_info.xfer_len = cmd[4];
1785 if (cdb_info.xfer_len == 0)
1786 cdb_info.xfer_len = 256;
5d0f6131
VV		 1787 break;
1788 case WRITE_10:
1789 case READ_10:
cbbb7a2e
CH		 1790 cdb_info.lba = get_unaligned_be32(&cmd[2]);
1791 cdb_info.xfer_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 1792 break;
1793 case WRITE_12:
1794 case READ_12:
cbbb7a2e
CH		 1795 cdb_info.lba = get_unaligned_be32(&cmd[2]);
1796 cdb_info.xfer_len = get_unaligned_be32(&cmd[6]);
5d0f6131
VV		 1797 break;
1798 case WRITE_16:
1799 case READ_16:
cbbb7a2e
CH		 1800 cdb_info.lba = get_unaligned_be64(&cmd[2]);
1801 cdb_info.xfer_len = get_unaligned_be32(&cmd[10]);
5d0f6131
VV		 1802 break;
1803 default:
1804 /* Will never really reach here */
e61b0a86 1805 res = -EIO;
5d0f6131
VV		 1806 goto out;
1807 }
1808
1809 /* Calculate total length of transfer (in bytes) */
1810 if (hdr->iovec_count > 0) {
5d0f6131 1811 for (i = 0; i < hdr->iovec_count; i++) {
8741ee4c
VV		 1812 not_copied = copy_from_user(&sgl, hdr->dxferp +
1813 i * sizeof(struct sg_iovec),
1814 sizeof(struct sg_iovec));
1815 if (not_copied)
1816 return -EFAULT;
1817 sum_iov_len += sgl.iov_len;
5d0f6131 1818 /* IO vector sizes should be multiples of block size */
8741ee4c 1819 if (sgl.iov_len % (1 << ns->lba_shift) != 0) {
5d0f6131
VV		 1820 res = nvme_trans_completion(hdr,
1821 SAM_STAT_CHECK_CONDITION,
1822 ILLEGAL_REQUEST,
1823 SCSI_ASC_INVALID_PARAMETER,
1824 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1825 goto out;
1826 }
1827 }
1828 } else {
1829 sum_iov_len = hdr->dxfer_len;
1830 }
1831
1832 /* As Per sg ioctl howto, if the lengths differ, use the lower one */
1833 xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);
1834
1835 /* If block count and actual data buffer size dont match, error out */
1836 if (xfer_bytes != (cdb_info.xfer_len << ns->lba_shift)) {
1837 res = -EINVAL;
1838 goto out;
1839 }
1840
1841 /* Check for 0 length transfer - it is not illegal */
1842 if (cdb_info.xfer_len == 0)
1843 goto out;
1844
1845 /* Send NVMe IO Command(s) */
1846 res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);
e61b0a86 1847 if (res)
5d0f6131
VV		 1848 goto out;
1849
1850 out:
1851 return res;
1852}
1853
1854static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1855 u8 *cmd)
1856{
e61b0a86 1857 int res = 0;
5d0f6131
VV		 1858 u8 evpd;
1859 u8 page_code;
1860 int alloc_len;
1861 u8 *inq_response;
1862
3726897e
CH		 1863 evpd = cmd[1] & 0x01;
1864 page_code = cmd[2];
1865 alloc_len = get_unaligned_be16(&cmd[3]);
5d0f6131 1866
3fd61b20
CH		 1867 inq_response = kmalloc(max(alloc_len, STANDARD_INQUIRY_LENGTH),
1868 GFP_KERNEL);
5d0f6131
VV		 1869 if (inq_response == NULL) {
1870 res = -ENOMEM;
1871 goto out_mem;
1872 }
1873
1874 if (evpd == 0) {
1875 if (page_code == INQ_STANDARD_INQUIRY_PAGE) {
1876 res = nvme_trans_standard_inquiry_page(ns, hdr,
1877 inq_response, alloc_len);
1878 } else {
1879 res = nvme_trans_completion(hdr,
1880 SAM_STAT_CHECK_CONDITION,
1881 ILLEGAL_REQUEST,
1882 SCSI_ASC_INVALID_CDB,
1883 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1884 }
1885 } else {
1886 switch (page_code) {
1887 case VPD_SUPPORTED_PAGES:
1888 res = nvme_trans_supported_vpd_pages(ns, hdr,
1889 inq_response, alloc_len);
1890 break;
1891 case VPD_SERIAL_NUMBER:
1892 res = nvme_trans_unit_serial_page(ns, hdr, inq_response,
1893 alloc_len);
1894 break;
1895 case VPD_DEVICE_IDENTIFIERS:
1896 res = nvme_trans_device_id_page(ns, hdr, inq_response,
1897 alloc_len);
1898 break;
1899 case VPD_EXTENDED_INQUIRY:
1900 res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
1901 break;
7f749d9c
KB		 1902 case VPD_BLOCK_LIMITS:
1903 res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
1904 alloc_len);
1905 break;
5d0f6131
VV		 1906 case VPD_BLOCK_DEV_CHARACTERISTICS:
1907 res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
1908 break;
1909 default:
1910 res = nvme_trans_completion(hdr,
1911 SAM_STAT_CHECK_CONDITION,
1912 ILLEGAL_REQUEST,
1913 SCSI_ASC_INVALID_CDB,
1914 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1915 break;
1916 }
1917 }
1918 kfree(inq_response);
1919 out_mem:
1920 return res;
1921}
1922
1923static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1924 u8 *cmd)
1925{
e61b0a86 1926 int res;
5d0f6131 1927 u16 alloc_len;
5d0f6131
VV		 1928 u8 pc;
1929 u8 page_code;
1930
3726897e 1931 if (cmd[1] != LOG_SENSE_CDB_SP_NOT_ENABLED) {
5d0f6131
VV		 1932 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1933 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1934 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1935 goto out;
1936 }
3726897e
CH		 1937
1938 page_code = cmd[2] & LOG_SENSE_CDB_PAGE_CODE_MASK;
1939 pc = (cmd[2] & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT;
5d0f6131
VV		 1940 if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) {
1941 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1942 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1943 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1944 goto out;
1945 }
3726897e 1946 alloc_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 1947 switch (page_code) {
1948 case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE:
1949 res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);
1950 break;
1951 case LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE:
1952 res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);
1953 break;
1954 case LOG_PAGE_TEMPERATURE_PAGE:
1955 res = nvme_trans_log_temperature(ns, hdr, alloc_len);
1956 break;
1957 default:
1958 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1959 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1960 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1961 break;
1962 }
1963
1964 out:
1965 return res;
1966}
1967
1968static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1969 u8 *cmd)
1970{
5d0f6131
VV		 1971 u8 cdb10 = 0;
1972 u16 parm_list_len;
1973 u8 page_format;
1974 u8 save_pages;
1975
3726897e
CH		 1976 page_format = cmd[1] & MODE_SELECT_CDB_PAGE_FORMAT_MASK;
1977 save_pages = cmd[1] & MODE_SELECT_CDB_SAVE_PAGES_MASK;
5d0f6131 1978
3726897e
CH		 1979 if (cmd[0] == MODE_SELECT) {
1980 parm_list_len = cmd[4];
5d0f6131 1981 } else {
3726897e 1982 parm_list_len = cmd[7];
5d0f6131
VV		 1983 cdb10 = 1;
1984 }
1985
1986 if (parm_list_len != 0) {
1987 /*
1988 * According to SPC-4 r24, a paramter list length field of 0
1989 * shall not be considered an error
1990 */
e61b0a86 1991 return nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
5d0f6131
VV		 1992 page_format, save_pages, cdb10);
1993 }
1994
e61b0a86 1995 return 0;
5d0f6131
VV		 1996}
1997
1998static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1999 u8 *cmd)
2000{
e61b0a86 2001 int res = 0;
5d0f6131
VV		 2002 u16 alloc_len;
2003 u8 cdb10 = 0;
5d0f6131 2004
3726897e
CH		 2005 if (cmd[0] == MODE_SENSE) {
2006 alloc_len = cmd[4];
5d0f6131 2007 } else {
3726897e 2008 alloc_len = get_unaligned_be16(&cmd[7]);
5d0f6131
VV		 2009 cdb10 = 1;
2010 }
2011
3726897e
CH		 2012 if ((cmd[2] & MODE_SENSE_PAGE_CONTROL_MASK) !=
2013 MODE_SENSE_PC_CURRENT_VALUES) {
5d0f6131
VV		 2014 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2015 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2016 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2017 goto out;
2018 }
2019
3726897e 2020 switch (cmd[2] & MODE_SENSE_PAGE_CODE_MASK) {
5d0f6131
VV		 2021 case MODE_PAGE_CACHING:
2022 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2023 cdb10,
2024 &nvme_trans_fill_caching_page,
2025 MODE_PAGE_CACHING_LEN);
2026 break;
2027 case MODE_PAGE_CONTROL:
2028 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2029 cdb10,
2030 &nvme_trans_fill_control_page,
2031 MODE_PAGE_CONTROL_LEN);
2032 break;
2033 case MODE_PAGE_POWER_CONDITION:
2034 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2035 cdb10,
2036 &nvme_trans_fill_pow_cnd_page,
2037 MODE_PAGE_POW_CND_LEN);
2038 break;
2039 case MODE_PAGE_INFO_EXCEP:
2040 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2041 cdb10,
2042 &nvme_trans_fill_inf_exc_page,
2043 MODE_PAGE_INF_EXC_LEN);
2044 break;
2045 case MODE_PAGE_RETURN_ALL:
2046 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2047 cdb10,
2048 &nvme_trans_fill_all_pages,
2049 MODE_PAGE_ALL_LEN);
2050 break;
2051 default:
2052 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2053 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2054 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2055 break;
2056 }
2057
2058 out:
2059 return res;
2060}
2061
2062static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
3726897e 2063 u8 *cmd, u8 cdb16)
5d0f6131 2064{
e61b0a86 2065 int res;
5d0f6131 2066 int nvme_sc;
3726897e
CH		 2067 u32 alloc_len;
2068 u32 resp_size;
5d0f6131 2069 u32 xfer_len;
5d0f6131
VV		 2070 struct nvme_id_ns *id_ns;
2071 u8 *response;
2072
5d0f6131 2073 if (cdb16) {
3726897e 2074 alloc_len = get_unaligned_be32(&cmd[10]);
5d0f6131 2075 resp_size = READ_CAP_16_RESP_SIZE;
3726897e
CH		 2076 } else {
2077 alloc_len = READ_CAP_10_RESP_SIZE;
2078 resp_size = READ_CAP_10_RESP_SIZE;
5d0f6131
VV		 2079 }
2080
1c63dc66 2081 nvme_sc = nvme_identify_ns(ns->ctrl, ns->ns_id, &id_ns);
5d0f6131
VV		 2082 res = nvme_trans_status_code(hdr, nvme_sc);
2083 if (res)
d29ec824 2084 return res;
5d0f6131 2085
03ea83e9 2086 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2087 if (response == NULL) {
2088 res = -ENOMEM;
d29ec824 2089 goto out_free_id;
5d0f6131 2090 }
5d0f6131
VV		 2091 nvme_trans_fill_read_cap(response, id_ns, cdb16);
2092
2093 xfer_len = min(alloc_len, resp_size);
2094 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2095
2096 kfree(response);
d29ec824
CH		 2097 out_free_id:
2098 kfree(id_ns);
5d0f6131
VV		 2099 return res;
2100}
2101
2102static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2103 u8 *cmd)
2104{
e61b0a86 2105 int res;
5d0f6131
VV		 2106 int nvme_sc;
2107 u32 alloc_len, xfer_len, resp_size;
5d0f6131 2108 u8 *response;
5d0f6131
VV		 2109 struct nvme_id_ctrl *id_ctrl;
2110 u32 ll_length, lun_id;
2111 u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
8741ee4c 2112 __be32 tmp_len;
5d0f6131 2113
3726897e
CH		 2114 switch (cmd[2]) {
2115 default:
2116 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2117 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2118 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
3726897e
CH		 2119 case ALL_LUNS_RETURNED:
2120 case ALL_WELL_KNOWN_LUNS_RETURNED:
2121 case RESTRICTED_LUNS_RETURNED:
1c63dc66 2122 nvme_sc = nvme_identify_ctrl(ns->ctrl, &id_ctrl);
5d0f6131
VV		 2123 res = nvme_trans_status_code(hdr, nvme_sc);
2124 if (res)
d29ec824 2125 return res;
e61b0a86 2126
8741ee4c 2127 ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
5d0f6131
VV		 2128 resp_size = ll_length + LUN_DATA_HEADER_SIZE;
2129
3726897e 2130 alloc_len = get_unaligned_be32(&cmd[6]);
5d0f6131
VV		 2131 if (alloc_len < resp_size) {
2132 res = nvme_trans_completion(hdr,
2133 SAM_STAT_CHECK_CONDITION,
2134 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2135 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
d29ec824 2136 goto out_free_id;
5d0f6131
VV		 2137 }
2138
03ea83e9 2139 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2140 if (response == NULL) {
2141 res = -ENOMEM;
d29ec824 2142 goto out_free_id;
5d0f6131 2143 }
5d0f6131
VV		 2144
2145 /* The first LUN ID will always be 0 per the SAM spec */
8741ee4c 2146 for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
5d0f6131
VV		 2147 /*
2148 * Set the LUN Id and then increment to the next LUN
2149 * location in the parameter data.
2150 */
8741ee4c 2151 __be64 tmp_id = cpu_to_be64(lun_id);
5d0f6131
VV		 2152 memcpy(&response[lun_id_offset], &tmp_id, sizeof(u64));
2153 lun_id_offset += LUN_ENTRY_SIZE;
2154 }
2155 tmp_len = cpu_to_be32(ll_length);
2156 memcpy(response, &tmp_len, sizeof(u32));
2157 }
2158
2159 xfer_len = min(alloc_len, resp_size);
2160 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2161
2162 kfree(response);
d29ec824
CH		 2163 out_free_id:
2164 kfree(id_ctrl);
5d0f6131
VV		 2165 return res;
2166}
2167
2168static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2169 u8 *cmd)
2170{
e61b0a86 2171 int res;
5d0f6131
VV		 2172 u8 alloc_len, xfer_len, resp_size;
2173 u8 desc_format;
2174 u8 *response;
2175
3726897e
CH		 2176 desc_format = cmd[1] & 0x01;
2177 alloc_len = cmd[4];
5d0f6131
VV		 2178
2179 resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
2180 (FIXED_FMT_SENSE_DATA_SIZE));
03ea83e9 2181 response = kzalloc(resp_size, GFP_KERNEL);
5d0f6131
VV		 2182 if (response == NULL) {
2183 res = -ENOMEM;
2184 goto out;
2185 }
5d0f6131 2186
3726897e 2187 if (desc_format) {
5d0f6131
VV		 2188 /* Descriptor Format Sense Data */
2189 response[0] = DESC_FORMAT_SENSE_DATA;
2190 response[1] = NO_SENSE;
2191 /* TODO How is LOW POWER CONDITION ON handled? (byte 2) */
2192 response[2] = SCSI_ASC_NO_SENSE;
2193 response[3] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2194 /* SDAT_OVFL = 0 | Additional Sense Length = 0 */
2195 } else {
2196 /* Fixed Format Sense Data */
2197 response[0] = FIXED_SENSE_DATA;
2198 /* Byte 1 = Obsolete */
2199 response[2] = NO_SENSE; /* FM, EOM, ILI, SDAT_OVFL = 0 */
2200 /* Bytes 3-6 - Information - set to zero */
2201 response[7] = FIXED_SENSE_DATA_ADD_LENGTH;
2202 /* Bytes 8-11 - Cmd Specific Information - set to zero */
2203 response[12] = SCSI_ASC_NO_SENSE;
2204 response[13] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2205 /* Byte 14 = Field Replaceable Unit Code = 0 */
2206 /* Bytes 15-17 - SKSV=0; Sense Key Specific = 0 */
2207 }
2208
2209 xfer_len = min(alloc_len, resp_size);
2210 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2211
2212 kfree(response);
2213 out:
2214 return res;
2215}
2216
2217static int nvme_trans_security_protocol(struct nvme_ns *ns,
2218 struct sg_io_hdr *hdr,
2219 u8 *cmd)
2220{
2221 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2222 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2223 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2224}
2225
d29ec824
CH		 2226static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
2227 struct sg_io_hdr *hdr)
5d0f6131 2228{
5d0f6131 2229 int nvme_sc;
14385de1 2230 struct nvme_command c;
5d0f6131 2231
d29ec824
CH		 2232 memset(&c, 0, sizeof(c));
2233 c.common.opcode = nvme_cmd_flush;
2234 c.common.nsid = cpu_to_le32(ns->ns_id);
5d0f6131 2235
d29ec824
CH		 2236 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
2237 return nvme_trans_status_code(hdr, nvme_sc);
2238}
2239
2240static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2241 u8 *cmd)
2242{
5d0f6131
VV		 2243 u8 immed, pcmod, pc, no_flush, start;
2244
3726897e
CH		 2245 immed = cmd[1] & 0x01;
2246 pcmod = cmd[3] & 0x0f;
2247 pc = (cmd[4] & 0xf0) >> 4;
2248 no_flush = cmd[4] & 0x04;
2249 start = cmd[4] & 0x01;
5d0f6131
VV		 2250
2251 if (immed != 0) {
e61b0a86 2252 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2253 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2254 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2255 } else {
2256 if (no_flush == 0) {
2257 /* Issue NVME FLUSH command prior to START STOP UNIT */
d29ec824 2258 int res = nvme_trans_synchronize_cache(ns, hdr);
5d0f6131 2259 if (res)
e61b0a86 2260 return res;
5d0f6131
VV		 2261 }
2262 /* Setup the expected power state transition */
e61b0a86 2263 return nvme_trans_power_state(ns, hdr, pc, pcmod, start);
5d0f6131 2264 }
5d0f6131
VV		 2265}
2266
2267static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2268 u8 *cmd)
2269{
e61b0a86 2270 int res;
5d0f6131
VV		 2271 u8 parm_hdr_len = 0;
2272 u8 nvme_pf_code = 0;
2273 u8 format_prot_info, long_list, format_data;
2274
3726897e
CH		 2275 format_prot_info = (cmd[1] & 0xc0) >> 6;
2276 long_list = cmd[1] & 0x20;
2277 format_data = cmd[1] & 0x10;
5d0f6131
VV		 2278
2279 if (format_data != 0) {
2280 if (format_prot_info != 0) {
2281 if (long_list == 0)
2282 parm_hdr_len = FORMAT_UNIT_SHORT_PARM_LIST_LEN;
2283 else
2284 parm_hdr_len = FORMAT_UNIT_LONG_PARM_LIST_LEN;
2285 }
2286 } else if (format_data == 0 && format_prot_info != 0) {
2287 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2288 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2289 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2290 goto out;
2291 }
2292
2293 /* Get parm header from data-in/out buffer */
2294 /*
2295 * According to the translation spec, the only fields in the parameter
2296 * list we are concerned with are in the header. So allocate only that.
2297 */
2298 if (parm_hdr_len > 0) {
2299 res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,
2300 format_prot_info, &nvme_pf_code);
e61b0a86 2301 if (res)
5d0f6131
VV		 2302 goto out;
2303 }
2304
2305 /* Attempt to activate any previously downloaded firmware image */
b90c48d0 2306 res = nvme_trans_send_activate_fw_cmd(ns, hdr, 0);
5d0f6131
VV		 2307
2308 /* Determine Block size and count and send format command */
2309 res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
e61b0a86 2310 if (res)
5d0f6131
VV		 2311 goto out;
2312
2313 res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);
2314
2315 out:
2316 return res;
2317}
2318
2319static int nvme_trans_test_unit_ready(struct nvme_ns *ns,
2320 struct sg_io_hdr *hdr,
2321 u8 *cmd)
2322{
1c63dc66 2323 if (nvme_ctrl_ready(ns->ctrl))
e61b0a86 2324 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
5d0f6131
VV		 2325 NOT_READY, SCSI_ASC_LUN_NOT_READY,
2326 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2327 else
e61b0a86 2328 return nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
5d0f6131
VV		 2329}
2330
2331static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2332 u8 *cmd)
2333{
e61b0a86 2334 int res = 0;
5d0f6131
VV		 2335 u32 buffer_offset, parm_list_length;
2336 u8 buffer_id, mode;
2337
3726897e 2338 parm_list_length = get_unaligned_be24(&cmd[6]);
5d0f6131
VV		 2339 if (parm_list_length % BYTES_TO_DWORDS != 0) {
2340 /* NVMe expects Firmware file to be a whole number of DWORDS */
2341 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2342 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2343 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2344 goto out;
2345 }
3726897e 2346 buffer_id = cmd[2];
5d0f6131
VV		 2347 if (buffer_id > NVME_MAX_FIRMWARE_SLOT) {
2348 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2349 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2350 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2351 goto out;
2352 }
3726897e
CH		 2353 mode = cmd[1] & 0x1f;
2354 buffer_offset = get_unaligned_be24(&cmd[3]);
5d0f6131
VV		 2355
2356 switch (mode) {
2357 case DOWNLOAD_SAVE_ACTIVATE:
b90c48d0 2358 res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
5d0f6131
VV		 2359 parm_list_length, buffer_offset,
2360 buffer_id);
e61b0a86 2361 if (res)
5d0f6131 2362 goto out;
b90c48d0 2363 res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
5d0f6131
VV		 2364 break;
2365 case DOWNLOAD_SAVE_DEFER_ACTIVATE:
b90c48d0 2366 res = nvme_trans_send_download_fw_cmd(ns, hdr, nvme_admin_download_fw,
5d0f6131
VV		 2367 parm_list_length, buffer_offset,
2368 buffer_id);
2369 break;
2370 case ACTIVATE_DEFERRED_MICROCODE:
b90c48d0 2371 res = nvme_trans_send_activate_fw_cmd(ns, hdr, buffer_id);
5d0f6131
VV		 2372 break;
2373 default:
2374 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2375 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2376 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2377 break;
2378 }
2379
2380 out:
2381 return res;
2382}
2383
ec503733
KB		 2384struct scsi_unmap_blk_desc {
2385 __be64 slba;
2386 __be32 nlb;
2387 u32 resv;
2388};
2389
2390struct scsi_unmap_parm_list {
2391 __be16 unmap_data_len;
2392 __be16 unmap_blk_desc_data_len;
2393 u32 resv;
2394 struct scsi_unmap_blk_desc desc[0];
2395};
2396
2397static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2398 u8 *cmd)
2399{
ec503733
KB		 2400 struct scsi_unmap_parm_list *plist;
2401 struct nvme_dsm_range *range;
ec503733 2402 struct nvme_command c;
51ef72bd 2403 int i, nvme_sc, res;
ec503733 2404 u16 ndesc, list_len;
ec503733 2405
3726897e 2406 list_len = get_unaligned_be16(&cmd[7]);
ec503733
KB		 2407 if (!list_len)
2408 return -EINVAL;
2409
2410 plist = kmalloc(list_len, GFP_KERNEL);
2411 if (!plist)
2412 return -ENOMEM;
2413
2414 res = nvme_trans_copy_from_user(hdr, plist, list_len);
e61b0a86 2415 if (res)
ec503733
KB		 2416 goto out;
2417
2418 ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
2419 if (!ndesc || ndesc > 256) {
2420 res = -EINVAL;
2421 goto out;
2422 }
2423
d29ec824 2424 range = kcalloc(ndesc, sizeof(*range), GFP_KERNEL);
51ef72bd
AL		 2425 if (!range) {
2426 res = -ENOMEM;
ec503733 2427 goto out;
51ef72bd 2428 }
ec503733
KB		 2429
2430 for (i = 0; i < ndesc; i++) {
2431 range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));
2432 range[i].slba = cpu_to_le64(be64_to_cpu(plist->desc[i].slba));
2433 range[i].cattr = 0;
2434 }
2435
2436 memset(&c, 0, sizeof(c));
2437 c.dsm.opcode = nvme_cmd_dsm;
2438 c.dsm.nsid = cpu_to_le32(ns->ns_id);
ec503733
KB		 2439 c.dsm.nr = cpu_to_le32(ndesc - 1);
2440 c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
2441
d29ec824
CH		 2442 nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, range,
2443 ndesc * sizeof(*range));
ec503733
KB		 2444 res = nvme_trans_status_code(hdr, nvme_sc);
2445
d29ec824 2446 kfree(range);
ec503733
KB		 2447 out:
2448 kfree(plist);
2449 return res;
2450}
2451
5d0f6131
VV		 2452static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
2453{
2454 u8 cmd[BLK_MAX_CDB];
2455 int retcode;
2456 unsigned int opcode;
2457
2458 if (hdr->cmdp == NULL)
2459 return -EMSGSIZE;
2460 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
2461 return -EFAULT;
2462
695a4fe7
KB		 2463 /*
2464 * Prime the hdr with good status for scsi commands that don't require
2465 * an nvme command for translation.
2466 */
2467 retcode = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
2468 if (retcode)
2469 return retcode;
2470
5d0f6131
VV		 2471 opcode = cmd[0];
2472
2473 switch (opcode) {
2474 case READ_6:
2475 case READ_10:
2476 case READ_12:
2477 case READ_16:
2478 retcode = nvme_trans_io(ns, hdr, 0, cmd);
2479 break;
2480 case WRITE_6:
2481 case WRITE_10:
2482 case WRITE_12:
2483 case WRITE_16:
2484 retcode = nvme_trans_io(ns, hdr, 1, cmd);
2485 break;
2486 case INQUIRY:
2487 retcode = nvme_trans_inquiry(ns, hdr, cmd);
2488 break;
2489 case LOG_SENSE:
2490 retcode = nvme_trans_log_sense(ns, hdr, cmd);
2491 break;
2492 case MODE_SELECT:
2493 case MODE_SELECT_10:
2494 retcode = nvme_trans_mode_select(ns, hdr, cmd);
2495 break;
2496 case MODE_SENSE:
2497 case MODE_SENSE_10:
2498 retcode = nvme_trans_mode_sense(ns, hdr, cmd);
2499 break;
2500 case READ_CAPACITY:
3726897e 2501 retcode = nvme_trans_read_capacity(ns, hdr, cmd, 0);
5d0f6131 2502 break;
eb846d9f 2503 case SERVICE_ACTION_IN_16:
3726897e
CH		 2504 switch (cmd[1]) {
2505 case SAI_READ_CAPACITY_16:
2506 retcode = nvme_trans_read_capacity(ns, hdr, cmd, 1);
2507 break;
2508 default:
5d0f6131 2509 goto out;
3726897e 2510 }
5d0f6131
VV		 2511 break;
2512 case REPORT_LUNS:
2513 retcode = nvme_trans_report_luns(ns, hdr, cmd);
2514 break;
2515 case REQUEST_SENSE:
2516 retcode = nvme_trans_request_sense(ns, hdr, cmd);
2517 break;
2518 case SECURITY_PROTOCOL_IN:
2519 case SECURITY_PROTOCOL_OUT:
2520 retcode = nvme_trans_security_protocol(ns, hdr, cmd);
2521 break;
2522 case START_STOP:
2523 retcode = nvme_trans_start_stop(ns, hdr, cmd);
2524 break;
2525 case SYNCHRONIZE_CACHE:
d29ec824 2526 retcode = nvme_trans_synchronize_cache(ns, hdr);
5d0f6131
VV		 2527 break;
2528 case FORMAT_UNIT:
2529 retcode = nvme_trans_format_unit(ns, hdr, cmd);
2530 break;
2531 case TEST_UNIT_READY:
2532 retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);
2533 break;
2534 case WRITE_BUFFER:
2535 retcode = nvme_trans_write_buffer(ns, hdr, cmd);
2536 break;
ec503733
KB		 2537 case UNMAP:
2538 retcode = nvme_trans_unmap(ns, hdr, cmd);
2539 break;
5d0f6131
VV		 2540 default:
2541 out:
2542 retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2543 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2544 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2545 break;
2546 }
2547 return retcode;
2548}
2549
2550int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr)
2551{
2552 struct sg_io_hdr hdr;
2553 int retcode;
2554
2555 if (!capable(CAP_SYS_ADMIN))
2556 return -EACCES;
2557 if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))
2558 return -EFAULT;
2559 if (hdr.interface_id != 'S')
2560 return -EINVAL;
2561 if (hdr.cmd_len > BLK_MAX_CDB)
2562 return -EINVAL;
2563
e61b0a86
CH		 2564 /*
2565 * A positive return code means a NVMe status, which has been
2566 * translated to sense data.
2567 */
5d0f6131
VV		 2568 retcode = nvme_scsi_translate(ns, &hdr);
2569 if (retcode < 0)
2570 return retcode;
8741ee4c 2571 if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
5d0f6131 2572 return -EFAULT;
e61b0a86 2573 return 0;
5d0f6131
VV		 2574}
2575
2576int nvme_sg_get_version_num(int __user *ip)
2577{
2578 return put_user(sg_version_num, ip);
2579}
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