1 /*
2 * NVM Express device driver
3 * Copyright (c) 2011-2014, Intel Corporation.
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.
13 */
14
15 /*
16 * Refer to the SCSI-NVMe Translation spec for details on how
17 * each command is translated.
18 */
19
20 #include <linux/nvme.h>
21 #include <linux/bio.h>
22 #include <linux/bitops.h>
23 #include <linux/blkdev.h>
24 #include <linux/compat.h>
25 #include <linux/delay.h>
26 #include <linux/errno.h>
27 #include <linux/fs.h>
28 #include <linux/genhd.h>
29 #include <linux/idr.h>
30 #include <linux/init.h>
31 #include <linux/interrupt.h>
32 #include <linux/io.h>
33 #include <linux/kdev_t.h>
34 #include <linux/kthread.h>
35 #include <linux/kernel.h>
36 #include <linux/mm.h>
37 #include <linux/module.h>
38 #include <linux/moduleparam.h>
39 #include <linux/pci.h>
40 #include <linux/poison.h>
41 #include <linux/sched.h>
42 #include <linux/slab.h>
43 #include <linux/types.h>
44 #include <scsi/sg.h>
45 #include <scsi/scsi.h>
46
47
48 static int sg_version_num = 30534; /* 2 digits for each component */
49
50 #define SNTI_TRANSLATION_SUCCESS 0
51 #define SNTI_INTERNAL_ERROR 1
52
53 /* VPD Page Codes */
54 #define VPD_SUPPORTED_PAGES 0x00
55 #define VPD_SERIAL_NUMBER 0x80
56 #define VPD_DEVICE_IDENTIFIERS 0x83
57 #define VPD_EXTENDED_INQUIRY 0x86
58 #define VPD_BLOCK_LIMITS 0xB0
59 #define VPD_BLOCK_DEV_CHARACTERISTICS 0xB1
60
61 /* CDB offsets */
62 #define REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET 6
63 #define REPORT_LUNS_SR_OFFSET 2
64 #define READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET 10
65 #define REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET 4
66 #define REQUEST_SENSE_DESC_OFFSET 1
67 #define REQUEST_SENSE_DESC_MASK 0x01
68 #define DESCRIPTOR_FORMAT_SENSE_DATA_TYPE 1
69 #define INQUIRY_EVPD_BYTE_OFFSET 1
70 #define INQUIRY_PAGE_CODE_BYTE_OFFSET 2
71 #define INQUIRY_EVPD_BIT_MASK 1
72 #define INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET 3
73 #define START_STOP_UNIT_CDB_IMMED_OFFSET 1
74 #define START_STOP_UNIT_CDB_IMMED_MASK 0x1
75 #define START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET 3
76 #define START_STOP_UNIT_CDB_POWER_COND_MOD_MASK 0xF
77 #define START_STOP_UNIT_CDB_POWER_COND_OFFSET 4
78 #define START_STOP_UNIT_CDB_POWER_COND_MASK 0xF0
79 #define START_STOP_UNIT_CDB_NO_FLUSH_OFFSET 4
80 #define START_STOP_UNIT_CDB_NO_FLUSH_MASK 0x4
81 #define START_STOP_UNIT_CDB_START_OFFSET 4
82 #define START_STOP_UNIT_CDB_START_MASK 0x1
83 #define WRITE_BUFFER_CDB_MODE_OFFSET 1
84 #define WRITE_BUFFER_CDB_MODE_MASK 0x1F
85 #define WRITE_BUFFER_CDB_BUFFER_ID_OFFSET 2
86 #define WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET 3
87 #define WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET 6
88 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET 1
89 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK 0xC0
90 #define FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT 6
91 #define FORMAT_UNIT_CDB_LONG_LIST_OFFSET 1
92 #define FORMAT_UNIT_CDB_LONG_LIST_MASK 0x20
93 #define FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET 1
94 #define FORMAT_UNIT_CDB_FORMAT_DATA_MASK 0x10
95 #define FORMAT_UNIT_SHORT_PARM_LIST_LEN 4
96 #define FORMAT_UNIT_LONG_PARM_LIST_LEN 8
97 #define FORMAT_UNIT_PROT_INT_OFFSET 3
98 #define FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET 0
99 #define FORMAT_UNIT_PROT_FIELD_USAGE_MASK 0x07
100 #define UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET 7
101
102 /* Misc. defines */
103 #define NIBBLE_SHIFT 4
104 #define FIXED_SENSE_DATA 0x70
105 #define DESC_FORMAT_SENSE_DATA 0x72
106 #define FIXED_SENSE_DATA_ADD_LENGTH 10
107 #define LUN_ENTRY_SIZE 8
108 #define LUN_DATA_HEADER_SIZE 8
109 #define ALL_LUNS_RETURNED 0x02
110 #define ALL_WELL_KNOWN_LUNS_RETURNED 0x01
111 #define RESTRICTED_LUNS_RETURNED 0x00
112 #define NVME_POWER_STATE_START_VALID 0x00
113 #define NVME_POWER_STATE_ACTIVE 0x01
114 #define NVME_POWER_STATE_IDLE 0x02
115 #define NVME_POWER_STATE_STANDBY 0x03
116 #define NVME_POWER_STATE_LU_CONTROL 0x07
117 #define POWER_STATE_0 0
118 #define POWER_STATE_1 1
119 #define POWER_STATE_2 2
120 #define POWER_STATE_3 3
121 #define DOWNLOAD_SAVE_ACTIVATE 0x05
122 #define DOWNLOAD_SAVE_DEFER_ACTIVATE 0x0E
123 #define ACTIVATE_DEFERRED_MICROCODE 0x0F
124 #define FORMAT_UNIT_IMMED_MASK 0x2
125 #define FORMAT_UNIT_IMMED_OFFSET 1
126 #define KELVIN_TEMP_FACTOR 273
127 #define FIXED_FMT_SENSE_DATA_SIZE 18
128 #define DESC_FMT_SENSE_DATA_SIZE 8
129
130 /* SCSI/NVMe defines and bit masks */
131 #define INQ_STANDARD_INQUIRY_PAGE 0x00
132 #define INQ_SUPPORTED_VPD_PAGES_PAGE 0x00
133 #define INQ_UNIT_SERIAL_NUMBER_PAGE 0x80
134 #define INQ_DEVICE_IDENTIFICATION_PAGE 0x83
135 #define INQ_EXTENDED_INQUIRY_DATA_PAGE 0x86
136 #define INQ_BDEV_LIMITS_PAGE 0xB0
137 #define INQ_BDEV_CHARACTERISTICS_PAGE 0xB1
138 #define INQ_SERIAL_NUMBER_LENGTH 0x14
139 #define INQ_NUM_SUPPORTED_VPD_PAGES 6
140 #define VERSION_SPC_4 0x06
141 #define ACA_UNSUPPORTED 0
142 #define STANDARD_INQUIRY_LENGTH 36
143 #define ADDITIONAL_STD_INQ_LENGTH 31
144 #define EXTENDED_INQUIRY_DATA_PAGE_LENGTH 0x3C
145 #define RESERVED_FIELD 0
146
147 /* SCSI READ/WRITE Defines */
148 #define IO_CDB_WP_MASK 0xE0
149 #define IO_CDB_WP_SHIFT 5
150 #define IO_CDB_FUA_MASK 0x8
151 #define IO_6_CDB_LBA_OFFSET 0
152 #define IO_6_CDB_LBA_MASK 0x001FFFFF
153 #define IO_6_CDB_TX_LEN_OFFSET 4
154 #define IO_6_DEFAULT_TX_LEN 256
155 #define IO_10_CDB_LBA_OFFSET 2
156 #define IO_10_CDB_TX_LEN_OFFSET 7
157 #define IO_10_CDB_WP_OFFSET 1
158 #define IO_10_CDB_FUA_OFFSET 1
159 #define IO_12_CDB_LBA_OFFSET 2
160 #define IO_12_CDB_TX_LEN_OFFSET 6
161 #define IO_12_CDB_WP_OFFSET 1
162 #define IO_12_CDB_FUA_OFFSET 1
163 #define IO_16_CDB_FUA_OFFSET 1
164 #define IO_16_CDB_WP_OFFSET 1
165 #define IO_16_CDB_LBA_OFFSET 2
166 #define IO_16_CDB_TX_LEN_OFFSET 10
167
168 /* Mode Sense/Select defines */
169 #define MODE_PAGE_INFO_EXCEP 0x1C
170 #define MODE_PAGE_CACHING 0x08
171 #define MODE_PAGE_CONTROL 0x0A
172 #define MODE_PAGE_POWER_CONDITION 0x1A
173 #define MODE_PAGE_RETURN_ALL 0x3F
174 #define MODE_PAGE_BLK_DES_LEN 0x08
175 #define MODE_PAGE_LLBAA_BLK_DES_LEN 0x10
176 #define MODE_PAGE_CACHING_LEN 0x14
177 #define MODE_PAGE_CONTROL_LEN 0x0C
178 #define MODE_PAGE_POW_CND_LEN 0x28
179 #define MODE_PAGE_INF_EXC_LEN 0x0C
180 #define MODE_PAGE_ALL_LEN 0x54
181 #define MODE_SENSE6_MPH_SIZE 4
182 #define MODE_SENSE6_ALLOC_LEN_OFFSET 4
183 #define MODE_SENSE_PAGE_CONTROL_OFFSET 2
184 #define MODE_SENSE_PAGE_CONTROL_MASK 0xC0
185 #define MODE_SENSE_PAGE_CODE_OFFSET 2
186 #define MODE_SENSE_PAGE_CODE_MASK 0x3F
187 #define MODE_SENSE_LLBAA_OFFSET 1
188 #define MODE_SENSE_LLBAA_MASK 0x10
189 #define MODE_SENSE_LLBAA_SHIFT 4
190 #define MODE_SENSE_DBD_OFFSET 1
191 #define MODE_SENSE_DBD_MASK 8
192 #define MODE_SENSE_DBD_SHIFT 3
193 #define MODE_SENSE10_MPH_SIZE 8
194 #define MODE_SENSE10_ALLOC_LEN_OFFSET 7
195 #define MODE_SELECT_CDB_PAGE_FORMAT_OFFSET 1
196 #define MODE_SELECT_CDB_SAVE_PAGES_OFFSET 1
197 #define MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET 4
198 #define MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET 7
199 #define MODE_SELECT_CDB_PAGE_FORMAT_MASK 0x10
200 #define MODE_SELECT_CDB_SAVE_PAGES_MASK 0x1
201 #define MODE_SELECT_6_BD_OFFSET 3
202 #define MODE_SELECT_10_BD_OFFSET 6
203 #define MODE_SELECT_10_LLBAA_OFFSET 4
204 #define MODE_SELECT_10_LLBAA_MASK 1
205 #define MODE_SELECT_6_MPH_SIZE 4
206 #define MODE_SELECT_10_MPH_SIZE 8
207 #define CACHING_MODE_PAGE_WCE_MASK 0x04
208 #define MODE_SENSE_BLK_DESC_ENABLED 0
209 #define MODE_SENSE_BLK_DESC_COUNT 1
210 #define MODE_SELECT_PAGE_CODE_MASK 0x3F
211 #define SHORT_DESC_BLOCK 8
212 #define LONG_DESC_BLOCK 16
213 #define MODE_PAGE_POW_CND_LEN_FIELD 0x26
214 #define MODE_PAGE_INF_EXC_LEN_FIELD 0x0A
215 #define MODE_PAGE_CACHING_LEN_FIELD 0x12
216 #define MODE_PAGE_CONTROL_LEN_FIELD 0x0A
217 #define MODE_SENSE_PC_CURRENT_VALUES 0
218
219 /* Log Sense defines */
220 #define LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE 0x00
221 #define LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH 0x07
222 #define LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE 0x2F
223 #define LOG_PAGE_TEMPERATURE_PAGE 0x0D
224 #define LOG_SENSE_CDB_SP_OFFSET 1
225 #define LOG_SENSE_CDB_SP_NOT_ENABLED 0
226 #define LOG_SENSE_CDB_PC_OFFSET 2
227 #define LOG_SENSE_CDB_PC_MASK 0xC0
228 #define LOG_SENSE_CDB_PC_SHIFT 6
229 #define LOG_SENSE_CDB_PC_CUMULATIVE_VALUES 1
230 #define LOG_SENSE_CDB_PAGE_CODE_MASK 0x3F
231 #define LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET 7
232 #define REMAINING_INFO_EXCP_PAGE_LENGTH 0x8
233 #define LOG_INFO_EXCP_PAGE_LENGTH 0xC
234 #define REMAINING_TEMP_PAGE_LENGTH 0xC
235 #define LOG_TEMP_PAGE_LENGTH 0x10
236 #define LOG_TEMP_UNKNOWN 0xFF
237 #define SUPPORTED_LOG_PAGES_PAGE_LENGTH 0x3
238
239 /* Read Capacity defines */
240 #define READ_CAP_10_RESP_SIZE 8
241 #define READ_CAP_16_RESP_SIZE 32
242
243 /* NVMe Namespace and Command Defines */
244 #define BYTES_TO_DWORDS 4
245 #define NVME_MAX_FIRMWARE_SLOT 7
246
247 /* Report LUNs defines */
248 #define REPORT_LUNS_FIRST_LUN_OFFSET 8
249
250 /* SCSI ADDITIONAL SENSE Codes */
251
252 #define SCSI_ASC_NO_SENSE 0x00
253 #define SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT 0x03
254 #define SCSI_ASC_LUN_NOT_READY 0x04
255 #define SCSI_ASC_WARNING 0x0B
256 #define SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED 0x10
257 #define SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED 0x10
258 #define SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED 0x10
259 #define SCSI_ASC_UNRECOVERED_READ_ERROR 0x11
260 #define SCSI_ASC_MISCOMPARE_DURING_VERIFY 0x1D
261 #define SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID 0x20
262 #define SCSI_ASC_ILLEGAL_COMMAND 0x20
263 #define SCSI_ASC_ILLEGAL_BLOCK 0x21
264 #define SCSI_ASC_INVALID_CDB 0x24
265 #define SCSI_ASC_INVALID_LUN 0x25
266 #define SCSI_ASC_INVALID_PARAMETER 0x26
267 #define SCSI_ASC_FORMAT_COMMAND_FAILED 0x31
268 #define SCSI_ASC_INTERNAL_TARGET_FAILURE 0x44
269
270 /* SCSI ADDITIONAL SENSE Code Qualifiers */
271
272 #define SCSI_ASCQ_CAUSE_NOT_REPORTABLE 0x00
273 #define SCSI_ASCQ_FORMAT_COMMAND_FAILED 0x01
274 #define SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED 0x01
275 #define SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED 0x02
276 #define SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED 0x03
277 #define SCSI_ASCQ_FORMAT_IN_PROGRESS 0x04
278 #define SCSI_ASCQ_POWER_LOSS_EXPECTED 0x08
279 #define SCSI_ASCQ_INVALID_LUN_ID 0x09
280
281 /**
282 * DEVICE_SPECIFIC_PARAMETER in mode parameter header (see sbc2r16) to
283 * enable DPOFUA support type 0x10 value.
284 */
285 #define DEVICE_SPECIFIC_PARAMETER 0
286 #define VPD_ID_DESCRIPTOR_LENGTH sizeof(VPD_IDENTIFICATION_DESCRIPTOR)
287
288 /* MACROs to extract information from CDBs */
289
290 #define GET_OPCODE(cdb) cdb[0]
291
292 #define GET_U8_FROM_CDB(cdb, index) (cdb[index] << 0)
293
294 #define GET_U16_FROM_CDB(cdb, index) ((cdb[index] << 8) | (cdb[index + 1] << 0))
295
296 #define GET_U24_FROM_CDB(cdb, index) ((cdb[index] << 16) | \
297 (cdb[index + 1] << 8) | \
298 (cdb[index + 2] << 0))
299
300 #define GET_U32_FROM_CDB(cdb, index) ((cdb[index] << 24) | \
301 (cdb[index + 1] << 16) | \
302 (cdb[index + 2] << 8) | \
303 (cdb[index + 3] << 0))
304
305 #define GET_U64_FROM_CDB(cdb, index) ((((u64)cdb[index]) << 56) | \
306 (((u64)cdb[index + 1]) << 48) | \
307 (((u64)cdb[index + 2]) << 40) | \
308 (((u64)cdb[index + 3]) << 32) | \
309 (((u64)cdb[index + 4]) << 24) | \
310 (((u64)cdb[index + 5]) << 16) | \
311 (((u64)cdb[index + 6]) << 8) | \
312 (((u64)cdb[index + 7]) << 0))
313
314 /* Inquiry Helper Macros */
315 #define GET_INQ_EVPD_BIT(cdb) \
316 ((GET_U8_FROM_CDB(cdb, INQUIRY_EVPD_BYTE_OFFSET) & \
317 INQUIRY_EVPD_BIT_MASK) ? 1 : 0)
318
319 #define GET_INQ_PAGE_CODE(cdb) \
320 (GET_U8_FROM_CDB(cdb, INQUIRY_PAGE_CODE_BYTE_OFFSET))
321
322 #define GET_INQ_ALLOC_LENGTH(cdb) \
323 (GET_U16_FROM_CDB(cdb, INQUIRY_CDB_ALLOCATION_LENGTH_OFFSET))
324
325 /* Report LUNs Helper Macros */
326 #define GET_REPORT_LUNS_ALLOC_LENGTH(cdb) \
327 (GET_U32_FROM_CDB(cdb, REPORT_LUNS_CDB_ALLOC_LENGTH_OFFSET))
328
329 /* Read Capacity Helper Macros */
330 #define GET_READ_CAP_16_ALLOC_LENGTH(cdb) \
331 (GET_U32_FROM_CDB(cdb, READ_CAP_16_CDB_ALLOC_LENGTH_OFFSET))
332
333 #define IS_READ_CAP_16(cdb) \
334 ((cdb[0] == SERVICE_ACTION_IN_16 && cdb[1] == SAI_READ_CAPACITY_16) ? 1 : 0)
335
336 /* Request Sense Helper Macros */
337 #define GET_REQUEST_SENSE_ALLOC_LENGTH(cdb) \
338 (GET_U8_FROM_CDB(cdb, REQUEST_SENSE_CDB_ALLOC_LENGTH_OFFSET))
339
340 /* Mode Sense Helper Macros */
341 #define GET_MODE_SENSE_DBD(cdb) \
342 ((GET_U8_FROM_CDB(cdb, MODE_SENSE_DBD_OFFSET) & MODE_SENSE_DBD_MASK) >> \
343 MODE_SENSE_DBD_SHIFT)
344
345 #define GET_MODE_SENSE_LLBAA(cdb) \
346 ((GET_U8_FROM_CDB(cdb, MODE_SENSE_LLBAA_OFFSET) & \
347 MODE_SENSE_LLBAA_MASK) >> MODE_SENSE_LLBAA_SHIFT)
348
349 #define GET_MODE_SENSE_MPH_SIZE(cdb10) \
350 (cdb10 ? MODE_SENSE10_MPH_SIZE : MODE_SENSE6_MPH_SIZE)
351
352
353 /* Struct to gather data that needs to be extracted from a SCSI CDB.
354 Not conforming to any particular CDB variant, but compatible with all. */
355
356 struct nvme_trans_io_cdb {
357 u8 fua;
358 u8 prot_info;
359 u64 lba;
360 u32 xfer_len;
361 };
362
363
364 /* Internal Helper Functions */
365
366
367 /* Copy data to userspace memory */
368
nvme_trans_copy_to_user(struct sg_io_hdr * hdr,void * from,unsigned long n)369 static int nvme_trans_copy_to_user(struct sg_io_hdr *hdr, void *from,
370 unsigned long n)
371 {
372 int res = SNTI_TRANSLATION_SUCCESS;
373 unsigned long not_copied;
374 int i;
375 void *index = from;
376 size_t remaining = n;
377 size_t xfer_len;
378
379 if (hdr->iovec_count > 0) {
380 struct sg_iovec sgl;
381
382 for (i = 0; i < hdr->iovec_count; i++) {
383 not_copied = copy_from_user(&sgl, hdr->dxferp +
384 i * sizeof(struct sg_iovec),
385 sizeof(struct sg_iovec));
386 if (not_copied)
387 return -EFAULT;
388 xfer_len = min(remaining, sgl.iov_len);
389 not_copied = copy_to_user(sgl.iov_base, index,
390 xfer_len);
391 if (not_copied) {
392 res = -EFAULT;
393 break;
394 }
395 index += xfer_len;
396 remaining -= xfer_len;
397 if (remaining == 0)
398 break;
399 }
400 return res;
401 }
402 not_copied = copy_to_user(hdr->dxferp, from, n);
403 if (not_copied)
404 res = -EFAULT;
405 return res;
406 }
407
408 /* Copy data from userspace memory */
409
nvme_trans_copy_from_user(struct sg_io_hdr * hdr,void * to,unsigned long n)410 static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,
411 unsigned long n)
412 {
413 int res = SNTI_TRANSLATION_SUCCESS;
414 unsigned long not_copied;
415 int i;
416 void *index = to;
417 size_t remaining = n;
418 size_t xfer_len;
419
420 if (hdr->iovec_count > 0) {
421 struct sg_iovec sgl;
422
423 for (i = 0; i < hdr->iovec_count; i++) {
424 not_copied = copy_from_user(&sgl, hdr->dxferp +
425 i * sizeof(struct sg_iovec),
426 sizeof(struct sg_iovec));
427 if (not_copied)
428 return -EFAULT;
429 xfer_len = min(remaining, sgl.iov_len);
430 not_copied = copy_from_user(index, sgl.iov_base,
431 xfer_len);
432 if (not_copied) {
433 res = -EFAULT;
434 break;
435 }
436 index += xfer_len;
437 remaining -= xfer_len;
438 if (remaining == 0)
439 break;
440 }
441 return res;
442 }
443
444 not_copied = copy_from_user(to, hdr->dxferp, n);
445 if (not_copied)
446 res = -EFAULT;
447 return res;
448 }
449
450 /* Status/Sense Buffer Writeback */
451
nvme_trans_completion(struct sg_io_hdr * hdr,u8 status,u8 sense_key,u8 asc,u8 ascq)452 static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,
453 u8 asc, u8 ascq)
454 {
455 int res = SNTI_TRANSLATION_SUCCESS;
456 u8 xfer_len;
457 u8 resp[DESC_FMT_SENSE_DATA_SIZE];
458
459 if (scsi_status_is_good(status)) {
460 hdr->status = SAM_STAT_GOOD;
461 hdr->masked_status = GOOD;
462 hdr->host_status = DID_OK;
463 hdr->driver_status = DRIVER_OK;
464 hdr->sb_len_wr = 0;
465 } else {
466 hdr->status = status;
467 hdr->masked_status = status >> 1;
468 hdr->host_status = DID_OK;
469 hdr->driver_status = DRIVER_OK;
470
471 memset(resp, 0, DESC_FMT_SENSE_DATA_SIZE);
472 resp[0] = DESC_FORMAT_SENSE_DATA;
473 resp[1] = sense_key;
474 resp[2] = asc;
475 resp[3] = ascq;
476
477 xfer_len = min_t(u8, hdr->mx_sb_len, DESC_FMT_SENSE_DATA_SIZE);
478 hdr->sb_len_wr = xfer_len;
479 if (copy_to_user(hdr->sbp, resp, xfer_len) > 0)
480 res = -EFAULT;
481 }
482
483 return res;
484 }
485
nvme_trans_status_code(struct sg_io_hdr * hdr,int nvme_sc)486 static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)
487 {
488 u8 status, sense_key, asc, ascq;
489 int res = SNTI_TRANSLATION_SUCCESS;
490
491 /* For non-nvme (Linux) errors, simply return the error code */
492 if (nvme_sc < 0)
493 return nvme_sc;
494
495 /* Mask DNR, More, and reserved fields */
496 nvme_sc &= 0x7FF;
497
498 switch (nvme_sc) {
499 /* Generic Command Status */
500 case NVME_SC_SUCCESS:
501 status = SAM_STAT_GOOD;
502 sense_key = NO_SENSE;
503 asc = SCSI_ASC_NO_SENSE;
504 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
505 break;
506 case NVME_SC_INVALID_OPCODE:
507 status = SAM_STAT_CHECK_CONDITION;
508 sense_key = ILLEGAL_REQUEST;
509 asc = SCSI_ASC_ILLEGAL_COMMAND;
510 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
511 break;
512 case NVME_SC_INVALID_FIELD:
513 status = SAM_STAT_CHECK_CONDITION;
514 sense_key = ILLEGAL_REQUEST;
515 asc = SCSI_ASC_INVALID_CDB;
516 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
517 break;
518 case NVME_SC_DATA_XFER_ERROR:
519 status = SAM_STAT_CHECK_CONDITION;
520 sense_key = MEDIUM_ERROR;
521 asc = SCSI_ASC_NO_SENSE;
522 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
523 break;
524 case NVME_SC_POWER_LOSS:
525 status = SAM_STAT_TASK_ABORTED;
526 sense_key = ABORTED_COMMAND;
527 asc = SCSI_ASC_WARNING;
528 ascq = SCSI_ASCQ_POWER_LOSS_EXPECTED;
529 break;
530 case NVME_SC_INTERNAL:
531 status = SAM_STAT_CHECK_CONDITION;
532 sense_key = HARDWARE_ERROR;
533 asc = SCSI_ASC_INTERNAL_TARGET_FAILURE;
534 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
535 break;
536 case NVME_SC_ABORT_REQ:
537 status = SAM_STAT_TASK_ABORTED;
538 sense_key = ABORTED_COMMAND;
539 asc = SCSI_ASC_NO_SENSE;
540 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
541 break;
542 case NVME_SC_ABORT_QUEUE:
543 status = SAM_STAT_TASK_ABORTED;
544 sense_key = ABORTED_COMMAND;
545 asc = SCSI_ASC_NO_SENSE;
546 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
547 break;
548 case NVME_SC_FUSED_FAIL:
549 status = SAM_STAT_TASK_ABORTED;
550 sense_key = ABORTED_COMMAND;
551 asc = SCSI_ASC_NO_SENSE;
552 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
553 break;
554 case NVME_SC_FUSED_MISSING:
555 status = SAM_STAT_TASK_ABORTED;
556 sense_key = ABORTED_COMMAND;
557 asc = SCSI_ASC_NO_SENSE;
558 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
559 break;
560 case NVME_SC_INVALID_NS:
561 status = SAM_STAT_CHECK_CONDITION;
562 sense_key = ILLEGAL_REQUEST;
563 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
564 ascq = SCSI_ASCQ_INVALID_LUN_ID;
565 break;
566 case NVME_SC_LBA_RANGE:
567 status = SAM_STAT_CHECK_CONDITION;
568 sense_key = ILLEGAL_REQUEST;
569 asc = SCSI_ASC_ILLEGAL_BLOCK;
570 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
571 break;
572 case NVME_SC_CAP_EXCEEDED:
573 status = SAM_STAT_CHECK_CONDITION;
574 sense_key = MEDIUM_ERROR;
575 asc = SCSI_ASC_NO_SENSE;
576 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
577 break;
578 case NVME_SC_NS_NOT_READY:
579 status = SAM_STAT_CHECK_CONDITION;
580 sense_key = NOT_READY;
581 asc = SCSI_ASC_LUN_NOT_READY;
582 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
583 break;
584
585 /* Command Specific Status */
586 case NVME_SC_INVALID_FORMAT:
587 status = SAM_STAT_CHECK_CONDITION;
588 sense_key = ILLEGAL_REQUEST;
589 asc = SCSI_ASC_FORMAT_COMMAND_FAILED;
590 ascq = SCSI_ASCQ_FORMAT_COMMAND_FAILED;
591 break;
592 case NVME_SC_BAD_ATTRIBUTES:
593 status = SAM_STAT_CHECK_CONDITION;
594 sense_key = ILLEGAL_REQUEST;
595 asc = SCSI_ASC_INVALID_CDB;
596 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
597 break;
598
599 /* Media Errors */
600 case NVME_SC_WRITE_FAULT:
601 status = SAM_STAT_CHECK_CONDITION;
602 sense_key = MEDIUM_ERROR;
603 asc = SCSI_ASC_PERIPHERAL_DEV_WRITE_FAULT;
604 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
605 break;
606 case NVME_SC_READ_ERROR:
607 status = SAM_STAT_CHECK_CONDITION;
608 sense_key = MEDIUM_ERROR;
609 asc = SCSI_ASC_UNRECOVERED_READ_ERROR;
610 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
611 break;
612 case NVME_SC_GUARD_CHECK:
613 status = SAM_STAT_CHECK_CONDITION;
614 sense_key = MEDIUM_ERROR;
615 asc = SCSI_ASC_LOG_BLOCK_GUARD_CHECK_FAILED;
616 ascq = SCSI_ASCQ_LOG_BLOCK_GUARD_CHECK_FAILED;
617 break;
618 case NVME_SC_APPTAG_CHECK:
619 status = SAM_STAT_CHECK_CONDITION;
620 sense_key = MEDIUM_ERROR;
621 asc = SCSI_ASC_LOG_BLOCK_APPTAG_CHECK_FAILED;
622 ascq = SCSI_ASCQ_LOG_BLOCK_APPTAG_CHECK_FAILED;
623 break;
624 case NVME_SC_REFTAG_CHECK:
625 status = SAM_STAT_CHECK_CONDITION;
626 sense_key = MEDIUM_ERROR;
627 asc = SCSI_ASC_LOG_BLOCK_REFTAG_CHECK_FAILED;
628 ascq = SCSI_ASCQ_LOG_BLOCK_REFTAG_CHECK_FAILED;
629 break;
630 case NVME_SC_COMPARE_FAILED:
631 status = SAM_STAT_CHECK_CONDITION;
632 sense_key = MISCOMPARE;
633 asc = SCSI_ASC_MISCOMPARE_DURING_VERIFY;
634 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
635 break;
636 case NVME_SC_ACCESS_DENIED:
637 status = SAM_STAT_CHECK_CONDITION;
638 sense_key = ILLEGAL_REQUEST;
639 asc = SCSI_ASC_ACCESS_DENIED_INVALID_LUN_ID;
640 ascq = SCSI_ASCQ_INVALID_LUN_ID;
641 break;
642
643 /* Unspecified/Default */
644 case NVME_SC_CMDID_CONFLICT:
645 case NVME_SC_CMD_SEQ_ERROR:
646 case NVME_SC_CQ_INVALID:
647 case NVME_SC_QID_INVALID:
648 case NVME_SC_QUEUE_SIZE:
649 case NVME_SC_ABORT_LIMIT:
650 case NVME_SC_ABORT_MISSING:
651 case NVME_SC_ASYNC_LIMIT:
652 case NVME_SC_FIRMWARE_SLOT:
653 case NVME_SC_FIRMWARE_IMAGE:
654 case NVME_SC_INVALID_VECTOR:
655 case NVME_SC_INVALID_LOG_PAGE:
656 default:
657 status = SAM_STAT_CHECK_CONDITION;
658 sense_key = ILLEGAL_REQUEST;
659 asc = SCSI_ASC_NO_SENSE;
660 ascq = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
661 break;
662 }
663
664 res = nvme_trans_completion(hdr, status, sense_key, asc, ascq);
665
666 return res;
667 }
668
669 /* INQUIRY Helper Functions */
670
nvme_trans_standard_inquiry_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * inq_response,int alloc_len)671 static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
672 struct sg_io_hdr *hdr, u8 *inq_response,
673 int alloc_len)
674 {
675 struct nvme_dev *dev = ns->dev;
676 dma_addr_t dma_addr;
677 void *mem;
678 struct nvme_id_ns *id_ns;
679 int res = SNTI_TRANSLATION_SUCCESS;
680 int nvme_sc;
681 int xfer_len;
682 u8 resp_data_format = 0x02;
683 u8 protect;
684 u8 cmdque = 0x01 << 1;
685 u8 fw_offset = sizeof(dev->firmware_rev);
686
687 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
688 &dma_addr, GFP_KERNEL);
689 if (mem == NULL) {
690 res = -ENOMEM;
691 goto out_dma;
692 }
693
694 /* nvme ns identify - use DPS value for PROTECT field */
695 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
696 res = nvme_trans_status_code(hdr, nvme_sc);
697 /*
698 * If nvme_sc was -ve, res will be -ve here.
699 * If nvme_sc was +ve, the status would bace been translated, and res
700 * can only be 0 or -ve.
701 * - If 0 && nvme_sc > 0, then go into next if where res gets nvme_sc
702 * - If -ve, return because its a Linux error.
703 */
704 if (res)
705 goto out_free;
706 if (nvme_sc) {
707 res = nvme_sc;
708 goto out_free;
709 }
710 id_ns = mem;
711 (id_ns->dps) ? (protect = 0x01) : (protect = 0);
712
713 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
714 inq_response[2] = VERSION_SPC_4;
715 inq_response[3] = resp_data_format; /*normaca=0 | hisup=0 */
716 inq_response[4] = ADDITIONAL_STD_INQ_LENGTH;
717 inq_response[5] = protect; /* sccs=0 | acc=0 | tpgs=0 | pc3=0 */
718 inq_response[7] = cmdque; /* wbus16=0 | sync=0 | vs=0 */
719 strncpy(&inq_response[8], "NVMe ", 8);
720 strncpy(&inq_response[16], dev->model, 16);
721
722 while (dev->firmware_rev[fw_offset - 1] == ' ' && fw_offset > 4)
723 fw_offset--;
724 fw_offset -= 4;
725 strncpy(&inq_response[32], dev->firmware_rev + fw_offset, 4);
726
727 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
728 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
729
730 out_free:
731 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
732 dma_addr);
733 out_dma:
734 return res;
735 }
736
nvme_trans_supported_vpd_pages(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * inq_response,int alloc_len)737 static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
738 struct sg_io_hdr *hdr, u8 *inq_response,
739 int alloc_len)
740 {
741 int res = SNTI_TRANSLATION_SUCCESS;
742 int xfer_len;
743
744 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
745 inq_response[1] = INQ_SUPPORTED_VPD_PAGES_PAGE; /* Page Code */
746 inq_response[3] = INQ_NUM_SUPPORTED_VPD_PAGES; /* Page Length */
747 inq_response[4] = INQ_SUPPORTED_VPD_PAGES_PAGE;
748 inq_response[5] = INQ_UNIT_SERIAL_NUMBER_PAGE;
749 inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
750 inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
751 inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
752 inq_response[9] = INQ_BDEV_LIMITS_PAGE;
753
754 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
755 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
756
757 return res;
758 }
759
nvme_trans_unit_serial_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * inq_response,int alloc_len)760 static int nvme_trans_unit_serial_page(struct nvme_ns *ns,
761 struct sg_io_hdr *hdr, u8 *inq_response,
762 int alloc_len)
763 {
764 struct nvme_dev *dev = ns->dev;
765 int res = SNTI_TRANSLATION_SUCCESS;
766 int xfer_len;
767
768 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
769 inq_response[1] = INQ_UNIT_SERIAL_NUMBER_PAGE; /* Page Code */
770 inq_response[3] = INQ_SERIAL_NUMBER_LENGTH; /* Page Length */
771 strncpy(&inq_response[4], dev->serial, INQ_SERIAL_NUMBER_LENGTH);
772
773 xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
774 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
775
776 return res;
777 }
778
nvme_trans_device_id_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * inq_response,int alloc_len)779 static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
780 u8 *inq_response, int alloc_len)
781 {
782 struct nvme_dev *dev = ns->dev;
783 dma_addr_t dma_addr;
784 void *mem;
785 int res = SNTI_TRANSLATION_SUCCESS;
786 int nvme_sc;
787 int xfer_len;
788 __be32 tmp_id = cpu_to_be32(ns->ns_id);
789
790 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
791 &dma_addr, GFP_KERNEL);
792 if (mem == NULL) {
793 res = -ENOMEM;
794 goto out_dma;
795 }
796
797 memset(inq_response, 0, alloc_len);
798 inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE; /* Page Code */
799 if (readl(&dev->bar->vs) >= NVME_VS(1, 1)) {
800 struct nvme_id_ns *id_ns = mem;
801 void *eui = id_ns->eui64;
802 int len = sizeof(id_ns->eui64);
803
804 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
805 res = nvme_trans_status_code(hdr, nvme_sc);
806 if (res)
807 goto out_free;
808 if (nvme_sc) {
809 res = nvme_sc;
810 goto out_free;
811 }
812
813 if (readl(&dev->bar->vs) >= NVME_VS(1, 2)) {
814 if (bitmap_empty(eui, len * 8)) {
815 eui = id_ns->nguid;
816 len = sizeof(id_ns->nguid);
817 }
818 }
819 if (bitmap_empty(eui, len * 8))
820 goto scsi_string;
821
822 inq_response[3] = 4 + len; /* Page Length */
823 /* Designation Descriptor start */
824 inq_response[4] = 0x01; /* Proto ID=0h | Code set=1h */
825 inq_response[5] = 0x02; /* PIV=0b | Asso=00b | Designator Type=2h */
826 inq_response[6] = 0x00; /* Rsvd */
827 inq_response[7] = len; /* Designator Length */
828 memcpy(&inq_response[8], eui, len);
829 } else {
830 scsi_string:
831 if (alloc_len < 72) {
832 res = nvme_trans_completion(hdr,
833 SAM_STAT_CHECK_CONDITION,
834 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
835 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
836 goto out_free;
837 }
838 inq_response[3] = 0x48; /* Page Length */
839 /* Designation Descriptor start */
840 inq_response[4] = 0x03; /* Proto ID=0h | Code set=3h */
841 inq_response[5] = 0x08; /* PIV=0b | Asso=00b | Designator Type=8h */
842 inq_response[6] = 0x00; /* Rsvd */
843 inq_response[7] = 0x44; /* Designator Length */
844
845 sprintf(&inq_response[8], "%04x", dev->pci_dev->vendor);
846 memcpy(&inq_response[12], dev->model, sizeof(dev->model));
847 sprintf(&inq_response[52], "%04x", tmp_id);
848 memcpy(&inq_response[56], dev->serial, sizeof(dev->serial));
849 }
850 xfer_len = alloc_len;
851 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
852
853 out_free:
854 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
855 dma_addr);
856 out_dma:
857 return res;
858 }
859
nvme_trans_ext_inq_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,int alloc_len)860 static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
861 int alloc_len)
862 {
863 u8 *inq_response;
864 int res = SNTI_TRANSLATION_SUCCESS;
865 int nvme_sc;
866 struct nvme_dev *dev = ns->dev;
867 dma_addr_t dma_addr;
868 void *mem;
869 struct nvme_id_ctrl *id_ctrl;
870 struct nvme_id_ns *id_ns;
871 int xfer_len;
872 u8 microcode = 0x80;
873 u8 spt;
874 u8 spt_lut[8] = {0, 0, 2, 1, 4, 6, 5, 7};
875 u8 grd_chk, app_chk, ref_chk, protect;
876 u8 uask_sup = 0x20;
877 u8 v_sup;
878 u8 luiclr = 0x01;
879
880 inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
881 if (inq_response == NULL) {
882 res = -ENOMEM;
883 goto out_mem;
884 }
885
886 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
887 &dma_addr, GFP_KERNEL);
888 if (mem == NULL) {
889 res = -ENOMEM;
890 goto out_dma;
891 }
892
893 /* nvme ns identify */
894 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
895 res = nvme_trans_status_code(hdr, nvme_sc);
896 if (res)
897 goto out_free;
898 if (nvme_sc) {
899 res = nvme_sc;
900 goto out_free;
901 }
902 id_ns = mem;
903 spt = spt_lut[(id_ns->dpc) & 0x07] << 3;
904 (id_ns->dps) ? (protect = 0x01) : (protect = 0);
905 grd_chk = protect << 2;
906 app_chk = protect << 1;
907 ref_chk = protect;
908
909 /* nvme controller identify */
910 nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
911 res = nvme_trans_status_code(hdr, nvme_sc);
912 if (res)
913 goto out_free;
914 if (nvme_sc) {
915 res = nvme_sc;
916 goto out_free;
917 }
918 id_ctrl = mem;
919 v_sup = id_ctrl->vwc;
920
921 memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
922 inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE; /* Page Code */
923 inq_response[2] = 0x00; /* Page Length MSB */
924 inq_response[3] = 0x3C; /* Page Length LSB */
925 inq_response[4] = microcode | spt | grd_chk | app_chk | ref_chk;
926 inq_response[5] = uask_sup;
927 inq_response[6] = v_sup;
928 inq_response[7] = luiclr;
929 inq_response[8] = 0;
930 inq_response[9] = 0;
931
932 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
933 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
934
935 out_free:
936 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
937 dma_addr);
938 out_dma:
939 kfree(inq_response);
940 out_mem:
941 return res;
942 }
943
nvme_trans_bdev_limits_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * inq_response,int alloc_len)944 static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
945 u8 *inq_response, int alloc_len)
946 {
947 __be32 max_sectors = cpu_to_be32(
948 nvme_block_nr(ns, queue_max_hw_sectors(ns->queue)));
949 __be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
950 __be32 discard_desc_count = cpu_to_be32(0x100);
951
952 memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
953 inq_response[1] = VPD_BLOCK_LIMITS;
954 inq_response[3] = 0x3c; /* Page Length */
955 memcpy(&inq_response[8], &max_sectors, sizeof(u32));
956 memcpy(&inq_response[20], &max_discard, sizeof(u32));
957
958 if (max_discard)
959 memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
960
961 return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
962 }
963
nvme_trans_bdev_char_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,int alloc_len)964 static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
965 int alloc_len)
966 {
967 u8 *inq_response;
968 int res = SNTI_TRANSLATION_SUCCESS;
969 int xfer_len;
970
971 inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
972 if (inq_response == NULL) {
973 res = -ENOMEM;
974 goto out_mem;
975 }
976
977 inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE; /* Page Code */
978 inq_response[2] = 0x00; /* Page Length MSB */
979 inq_response[3] = 0x3C; /* Page Length LSB */
980 inq_response[4] = 0x00; /* Medium Rotation Rate MSB */
981 inq_response[5] = 0x01; /* Medium Rotation Rate LSB */
982 inq_response[6] = 0x00; /* Form Factor */
983
984 xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
985 res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
986
987 kfree(inq_response);
988 out_mem:
989 return res;
990 }
991
992 /* LOG SENSE Helper Functions */
993
nvme_trans_log_supp_pages(struct nvme_ns * ns,struct sg_io_hdr * hdr,int alloc_len)994 static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
995 int alloc_len)
996 {
997 int res = SNTI_TRANSLATION_SUCCESS;
998 int xfer_len;
999 u8 *log_response;
1000
1001 log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
1002 if (log_response == NULL) {
1003 res = -ENOMEM;
1004 goto out_mem;
1005 }
1006
1007 log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
1008 /* Subpage=0x00, Page Length MSB=0 */
1009 log_response[3] = SUPPORTED_LOG_PAGES_PAGE_LENGTH;
1010 log_response[4] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
1011 log_response[5] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
1012 log_response[6] = LOG_PAGE_TEMPERATURE_PAGE;
1013
1014 xfer_len = min(alloc_len, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
1015 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
1016
1017 kfree(log_response);
1018 out_mem:
1019 return res;
1020 }
1021
nvme_trans_log_info_exceptions(struct nvme_ns * ns,struct sg_io_hdr * hdr,int alloc_len)1022 static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
1023 struct sg_io_hdr *hdr, int alloc_len)
1024 {
1025 int res = SNTI_TRANSLATION_SUCCESS;
1026 int xfer_len;
1027 u8 *log_response;
1028 struct nvme_command c;
1029 struct nvme_dev *dev = ns->dev;
1030 struct nvme_smart_log *smart_log;
1031 dma_addr_t dma_addr;
1032 void *mem;
1033 u8 temp_c;
1034 u16 temp_k;
1035
1036 log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
1037 if (log_response == NULL) {
1038 res = -ENOMEM;
1039 goto out_mem;
1040 }
1041
1042 mem = dma_alloc_coherent(&dev->pci_dev->dev,
1043 sizeof(struct nvme_smart_log),
1044 &dma_addr, GFP_KERNEL);
1045 if (mem == NULL) {
1046 res = -ENOMEM;
1047 goto out_dma;
1048 }
1049
1050 /* Get SMART Log Page */
1051 memset(&c, 0, sizeof(c));
1052 c.common.opcode = nvme_admin_get_log_page;
1053 c.common.nsid = cpu_to_le32(0xFFFFFFFF);
1054 c.common.prp1 = cpu_to_le64(dma_addr);
1055 c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
1056 BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
1057 res = nvme_submit_admin_cmd(dev, &c, NULL);
1058 if (res != NVME_SC_SUCCESS) {
1059 temp_c = LOG_TEMP_UNKNOWN;
1060 } else {
1061 smart_log = mem;
1062 temp_k = (smart_log->temperature[1] << 8) +
1063 (smart_log->temperature[0]);
1064 temp_c = temp_k - KELVIN_TEMP_FACTOR;
1065 }
1066
1067 log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
1068 /* Subpage=0x00, Page Length MSB=0 */
1069 log_response[3] = REMAINING_INFO_EXCP_PAGE_LENGTH;
1070 /* Informational Exceptions Log Parameter 1 Start */
1071 /* Parameter Code=0x0000 bytes 4,5 */
1072 log_response[6] = 0x23; /* DU=0, TSD=1, ETC=0, TMC=0, FMT_AND_LNK=11b */
1073 log_response[7] = 0x04; /* PARAMETER LENGTH */
1074 /* Add sense Code and qualifier = 0x00 each */
1075 /* Use Temperature from NVMe Get Log Page, convert to C from K */
1076 log_response[10] = temp_c;
1077
1078 xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
1079 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
1080
1081 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
1082 mem, dma_addr);
1083 out_dma:
1084 kfree(log_response);
1085 out_mem:
1086 return res;
1087 }
1088
nvme_trans_log_temperature(struct nvme_ns * ns,struct sg_io_hdr * hdr,int alloc_len)1089 static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1090 int alloc_len)
1091 {
1092 int res = SNTI_TRANSLATION_SUCCESS;
1093 int xfer_len;
1094 u8 *log_response;
1095 struct nvme_command c;
1096 struct nvme_dev *dev = ns->dev;
1097 struct nvme_smart_log *smart_log;
1098 dma_addr_t dma_addr;
1099 void *mem;
1100 u32 feature_resp;
1101 u8 temp_c_cur, temp_c_thresh;
1102 u16 temp_k;
1103
1104 log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
1105 if (log_response == NULL) {
1106 res = -ENOMEM;
1107 goto out_mem;
1108 }
1109
1110 mem = dma_alloc_coherent(&dev->pci_dev->dev,
1111 sizeof(struct nvme_smart_log),
1112 &dma_addr, GFP_KERNEL);
1113 if (mem == NULL) {
1114 res = -ENOMEM;
1115 goto out_dma;
1116 }
1117
1118 /* Get SMART Log Page */
1119 memset(&c, 0, sizeof(c));
1120 c.common.opcode = nvme_admin_get_log_page;
1121 c.common.nsid = cpu_to_le32(0xFFFFFFFF);
1122 c.common.prp1 = cpu_to_le64(dma_addr);
1123 c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
1124 BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
1125 res = nvme_submit_admin_cmd(dev, &c, NULL);
1126 if (res != NVME_SC_SUCCESS) {
1127 temp_c_cur = LOG_TEMP_UNKNOWN;
1128 } else {
1129 smart_log = mem;
1130 temp_k = (smart_log->temperature[1] << 8) +
1131 (smart_log->temperature[0]);
1132 temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
1133 }
1134
1135 /* Get Features for Temp Threshold */
1136 res = nvme_get_features(dev, NVME_FEAT_TEMP_THRESH, 0, 0,
1137 &feature_resp);
1138 if (res != NVME_SC_SUCCESS)
1139 temp_c_thresh = LOG_TEMP_UNKNOWN;
1140 else
1141 temp_c_thresh = (feature_resp & 0xFFFF) - KELVIN_TEMP_FACTOR;
1142
1143 log_response[0] = LOG_PAGE_TEMPERATURE_PAGE;
1144 /* Subpage=0x00, Page Length MSB=0 */
1145 log_response[3] = REMAINING_TEMP_PAGE_LENGTH;
1146 /* Temperature Log Parameter 1 (Temperature) Start */
1147 /* Parameter Code = 0x0000 */
1148 log_response[6] = 0x01; /* Format and Linking = 01b */
1149 log_response[7] = 0x02; /* Parameter Length */
1150 /* Use Temperature from NVMe Get Log Page, convert to C from K */
1151 log_response[9] = temp_c_cur;
1152 /* Temperature Log Parameter 2 (Reference Temperature) Start */
1153 log_response[11] = 0x01; /* Parameter Code = 0x0001 */
1154 log_response[12] = 0x01; /* Format and Linking = 01b */
1155 log_response[13] = 0x02; /* Parameter Length */
1156 /* Use Temperature Thresh from NVMe Get Log Page, convert to C from K */
1157 log_response[15] = temp_c_thresh;
1158
1159 xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
1160 res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
1161
1162 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_smart_log),
1163 mem, dma_addr);
1164 out_dma:
1165 kfree(log_response);
1166 out_mem:
1167 return res;
1168 }
1169
1170 /* MODE SENSE Helper Functions */
1171
nvme_trans_fill_mode_parm_hdr(u8 * resp,int len,u8 cdb10,u8 llbaa,u16 mode_data_length,u16 blk_desc_len)1172 static int nvme_trans_fill_mode_parm_hdr(u8 *resp, int len, u8 cdb10, u8 llbaa,
1173 u16 mode_data_length, u16 blk_desc_len)
1174 {
1175 /* Quick check to make sure I don't stomp on my own memory... */
1176 if ((cdb10 && len < 8) || (!cdb10 && len < 4))
1177 return SNTI_INTERNAL_ERROR;
1178
1179 if (cdb10) {
1180 resp[0] = (mode_data_length & 0xFF00) >> 8;
1181 resp[1] = (mode_data_length & 0x00FF);
1182 /* resp[2] and [3] are zero */
1183 resp[4] = llbaa;
1184 resp[5] = RESERVED_FIELD;
1185 resp[6] = (blk_desc_len & 0xFF00) >> 8;
1186 resp[7] = (blk_desc_len & 0x00FF);
1187 } else {
1188 resp[0] = (mode_data_length & 0x00FF);
1189 /* resp[1] and [2] are zero */
1190 resp[3] = (blk_desc_len & 0x00FF);
1191 }
1192
1193 return SNTI_TRANSLATION_SUCCESS;
1194 }
1195
nvme_trans_fill_blk_desc(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len,u8 llbaa)1196 static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1197 u8 *resp, int len, u8 llbaa)
1198 {
1199 int res = SNTI_TRANSLATION_SUCCESS;
1200 int nvme_sc;
1201 struct nvme_dev *dev = ns->dev;
1202 dma_addr_t dma_addr;
1203 void *mem;
1204 struct nvme_id_ns *id_ns;
1205 u8 flbas;
1206 u32 lba_length;
1207
1208 if (llbaa == 0 && len < MODE_PAGE_BLK_DES_LEN)
1209 return SNTI_INTERNAL_ERROR;
1210 else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
1211 return SNTI_INTERNAL_ERROR;
1212
1213 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1214 &dma_addr, GFP_KERNEL);
1215 if (mem == NULL) {
1216 res = -ENOMEM;
1217 goto out;
1218 }
1219
1220 /* nvme ns identify */
1221 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1222 res = nvme_trans_status_code(hdr, nvme_sc);
1223 if (res)
1224 goto out_dma;
1225 if (nvme_sc) {
1226 res = nvme_sc;
1227 goto out_dma;
1228 }
1229 id_ns = mem;
1230 flbas = (id_ns->flbas) & 0x0F;
1231 lba_length = (1 << (id_ns->lbaf[flbas].ds));
1232
1233 if (llbaa == 0) {
1234 __be32 tmp_cap = cpu_to_be32(le64_to_cpu(id_ns->ncap));
1235 /* Byte 4 is reserved */
1236 __be32 tmp_len = cpu_to_be32(lba_length & 0x00FFFFFF);
1237
1238 memcpy(resp, &tmp_cap, sizeof(u32));
1239 memcpy(&resp[4], &tmp_len, sizeof(u32));
1240 } else {
1241 __be64 tmp_cap = cpu_to_be64(le64_to_cpu(id_ns->ncap));
1242 __be32 tmp_len = cpu_to_be32(lba_length);
1243
1244 memcpy(resp, &tmp_cap, sizeof(u64));
1245 /* Bytes 8, 9, 10, 11 are reserved */
1246 memcpy(&resp[12], &tmp_len, sizeof(u32));
1247 }
1248
1249 out_dma:
1250 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
1251 dma_addr);
1252 out:
1253 return res;
1254 }
1255
nvme_trans_fill_control_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len)1256 static int nvme_trans_fill_control_page(struct nvme_ns *ns,
1257 struct sg_io_hdr *hdr, u8 *resp,
1258 int len)
1259 {
1260 if (len < MODE_PAGE_CONTROL_LEN)
1261 return SNTI_INTERNAL_ERROR;
1262
1263 resp[0] = MODE_PAGE_CONTROL;
1264 resp[1] = MODE_PAGE_CONTROL_LEN_FIELD;
1265 resp[2] = 0x0E; /* TST=000b, TMF_ONLY=0, DPICZ=1,
1266 * D_SENSE=1, GLTSD=1, RLEC=0 */
1267 resp[3] = 0x12; /* Q_ALGO_MODIFIER=1h, NUAR=0, QERR=01b */
1268 /* Byte 4: VS=0, RAC=0, UA_INT=0, SWP=0 */
1269 resp[5] = 0x40; /* ATO=0, TAS=1, ATMPE=0, RWWP=0, AUTOLOAD=0 */
1270 /* resp[6] and [7] are obsolete, thus zero */
1271 resp[8] = 0xFF; /* Busy timeout period = 0xffff */
1272 resp[9] = 0xFF;
1273 /* Bytes 10,11: Extended selftest completion time = 0x0000 */
1274
1275 return SNTI_TRANSLATION_SUCCESS;
1276 }
1277
nvme_trans_fill_caching_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len)1278 static int nvme_trans_fill_caching_page(struct nvme_ns *ns,
1279 struct sg_io_hdr *hdr,
1280 u8 *resp, int len)
1281 {
1282 int res = SNTI_TRANSLATION_SUCCESS;
1283 int nvme_sc;
1284 struct nvme_dev *dev = ns->dev;
1285 u32 feature_resp;
1286 u8 vwc;
1287
1288 if (len < MODE_PAGE_CACHING_LEN)
1289 return SNTI_INTERNAL_ERROR;
1290
1291 nvme_sc = nvme_get_features(dev, NVME_FEAT_VOLATILE_WC, 0, 0,
1292 &feature_resp);
1293 res = nvme_trans_status_code(hdr, nvme_sc);
1294 if (res)
1295 goto out;
1296 if (nvme_sc) {
1297 res = nvme_sc;
1298 goto out;
1299 }
1300 vwc = feature_resp & 0x00000001;
1301
1302 resp[0] = MODE_PAGE_CACHING;
1303 resp[1] = MODE_PAGE_CACHING_LEN_FIELD;
1304 resp[2] = vwc << 2;
1305
1306 out:
1307 return res;
1308 }
1309
nvme_trans_fill_pow_cnd_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len)1310 static int nvme_trans_fill_pow_cnd_page(struct nvme_ns *ns,
1311 struct sg_io_hdr *hdr, u8 *resp,
1312 int len)
1313 {
1314 int res = SNTI_TRANSLATION_SUCCESS;
1315
1316 if (len < MODE_PAGE_POW_CND_LEN)
1317 return SNTI_INTERNAL_ERROR;
1318
1319 resp[0] = MODE_PAGE_POWER_CONDITION;
1320 resp[1] = MODE_PAGE_POW_CND_LEN_FIELD;
1321 /* All other bytes are zero */
1322
1323 return res;
1324 }
1325
nvme_trans_fill_inf_exc_page(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len)1326 static int nvme_trans_fill_inf_exc_page(struct nvme_ns *ns,
1327 struct sg_io_hdr *hdr, u8 *resp,
1328 int len)
1329 {
1330 int res = SNTI_TRANSLATION_SUCCESS;
1331
1332 if (len < MODE_PAGE_INF_EXC_LEN)
1333 return SNTI_INTERNAL_ERROR;
1334
1335 resp[0] = MODE_PAGE_INFO_EXCEP;
1336 resp[1] = MODE_PAGE_INF_EXC_LEN_FIELD;
1337 resp[2] = 0x88;
1338 /* All other bytes are zero */
1339
1340 return res;
1341 }
1342
nvme_trans_fill_all_pages(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * resp,int len)1343 static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1344 u8 *resp, int len)
1345 {
1346 int res = SNTI_TRANSLATION_SUCCESS;
1347 u16 mode_pages_offset_1 = 0;
1348 u16 mode_pages_offset_2, mode_pages_offset_3, mode_pages_offset_4;
1349
1350 mode_pages_offset_2 = mode_pages_offset_1 + MODE_PAGE_CACHING_LEN;
1351 mode_pages_offset_3 = mode_pages_offset_2 + MODE_PAGE_CONTROL_LEN;
1352 mode_pages_offset_4 = mode_pages_offset_3 + MODE_PAGE_POW_CND_LEN;
1353
1354 res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],
1355 MODE_PAGE_CACHING_LEN);
1356 if (res != SNTI_TRANSLATION_SUCCESS)
1357 goto out;
1358 res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],
1359 MODE_PAGE_CONTROL_LEN);
1360 if (res != SNTI_TRANSLATION_SUCCESS)
1361 goto out;
1362 res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],
1363 MODE_PAGE_POW_CND_LEN);
1364 if (res != SNTI_TRANSLATION_SUCCESS)
1365 goto out;
1366 res = nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],
1367 MODE_PAGE_INF_EXC_LEN);
1368 if (res != SNTI_TRANSLATION_SUCCESS)
1369 goto out;
1370
1371 out:
1372 return res;
1373 }
1374
nvme_trans_get_blk_desc_len(u8 dbd,u8 llbaa)1375 static inline int nvme_trans_get_blk_desc_len(u8 dbd, u8 llbaa)
1376 {
1377 if (dbd == MODE_SENSE_BLK_DESC_ENABLED) {
1378 /* SPC-4: len = 8 x Num_of_descriptors if llbaa = 0, 16x if 1 */
1379 return 8 * (llbaa + 1) * MODE_SENSE_BLK_DESC_COUNT;
1380 } else {
1381 return 0;
1382 }
1383 }
1384
nvme_trans_mode_page_create(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd,u16 alloc_len,u8 cdb10,int (* mode_page_fill_func)(struct nvme_ns *,struct sg_io_hdr * hdr,u8 *,int),u16 mode_pages_tot_len)1385 static int nvme_trans_mode_page_create(struct nvme_ns *ns,
1386 struct sg_io_hdr *hdr, u8 *cmd,
1387 u16 alloc_len, u8 cdb10,
1388 int (*mode_page_fill_func)
1389 (struct nvme_ns *,
1390 struct sg_io_hdr *hdr, u8 *, int),
1391 u16 mode_pages_tot_len)
1392 {
1393 int res = SNTI_TRANSLATION_SUCCESS;
1394 int xfer_len;
1395 u8 *response;
1396 u8 dbd, llbaa;
1397 u16 resp_size;
1398 int mph_size;
1399 u16 mode_pages_offset_1;
1400 u16 blk_desc_len, blk_desc_offset, mode_data_length;
1401
1402 dbd = GET_MODE_SENSE_DBD(cmd);
1403 llbaa = GET_MODE_SENSE_LLBAA(cmd);
1404 mph_size = GET_MODE_SENSE_MPH_SIZE(cdb10);
1405 blk_desc_len = nvme_trans_get_blk_desc_len(dbd, llbaa);
1406
1407 resp_size = mph_size + blk_desc_len + mode_pages_tot_len;
1408 /* Refer spc4r34 Table 440 for calculation of Mode data Length field */
1409 mode_data_length = 3 + (3 * cdb10) + blk_desc_len + mode_pages_tot_len;
1410
1411 blk_desc_offset = mph_size;
1412 mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
1413
1414 response = kzalloc(resp_size, GFP_KERNEL);
1415 if (response == NULL) {
1416 res = -ENOMEM;
1417 goto out_mem;
1418 }
1419
1420 res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
1421 llbaa, mode_data_length, blk_desc_len);
1422 if (res != SNTI_TRANSLATION_SUCCESS)
1423 goto out_free;
1424 if (blk_desc_len > 0) {
1425 res = nvme_trans_fill_blk_desc(ns, hdr,
1426 &response[blk_desc_offset],
1427 blk_desc_len, llbaa);
1428 if (res != SNTI_TRANSLATION_SUCCESS)
1429 goto out_free;
1430 }
1431 res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],
1432 mode_pages_tot_len);
1433 if (res != SNTI_TRANSLATION_SUCCESS)
1434 goto out_free;
1435
1436 xfer_len = min(alloc_len, resp_size);
1437 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
1438
1439 out_free:
1440 kfree(response);
1441 out_mem:
1442 return res;
1443 }
1444
1445 /* Read Capacity Helper Functions */
1446
nvme_trans_fill_read_cap(u8 * response,struct nvme_id_ns * id_ns,u8 cdb16)1447 static void nvme_trans_fill_read_cap(u8 *response, struct nvme_id_ns *id_ns,
1448 u8 cdb16)
1449 {
1450 u8 flbas;
1451 u32 lba_length;
1452 u64 rlba;
1453 u8 prot_en;
1454 u8 p_type_lut[4] = {0, 0, 1, 2};
1455 __be64 tmp_rlba;
1456 __be32 tmp_rlba_32;
1457 __be32 tmp_len;
1458
1459 flbas = (id_ns->flbas) & 0x0F;
1460 lba_length = (1 << (id_ns->lbaf[flbas].ds));
1461 rlba = le64_to_cpup(&id_ns->nsze) - 1;
1462 (id_ns->dps) ? (prot_en = 0x01) : (prot_en = 0);
1463
1464 if (!cdb16) {
1465 if (rlba > 0xFFFFFFFF)
1466 rlba = 0xFFFFFFFF;
1467 tmp_rlba_32 = cpu_to_be32(rlba);
1468 tmp_len = cpu_to_be32(lba_length);
1469 memcpy(response, &tmp_rlba_32, sizeof(u32));
1470 memcpy(&response[4], &tmp_len, sizeof(u32));
1471 } else {
1472 tmp_rlba = cpu_to_be64(rlba);
1473 tmp_len = cpu_to_be32(lba_length);
1474 memcpy(response, &tmp_rlba, sizeof(u64));
1475 memcpy(&response[8], &tmp_len, sizeof(u32));
1476 response[12] = (p_type_lut[id_ns->dps & 0x3] << 1) | prot_en;
1477 /* P_I_Exponent = 0x0 | LBPPBE = 0x0 */
1478 /* LBPME = 0 | LBPRZ = 0 | LALBA = 0x00 */
1479 /* Bytes 16-31 - Reserved */
1480 }
1481 }
1482
1483 /* Start Stop Unit Helper Functions */
1484
nvme_trans_power_state(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 pc,u8 pcmod,u8 start)1485 static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1486 u8 pc, u8 pcmod, u8 start)
1487 {
1488 int res = SNTI_TRANSLATION_SUCCESS;
1489 int nvme_sc;
1490 struct nvme_dev *dev = ns->dev;
1491 dma_addr_t dma_addr;
1492 void *mem;
1493 struct nvme_id_ctrl *id_ctrl;
1494 int lowest_pow_st; /* max npss = lowest power consumption */
1495 unsigned ps_desired = 0;
1496
1497 /* NVMe Controller Identify */
1498 mem = dma_alloc_coherent(&dev->pci_dev->dev,
1499 sizeof(struct nvme_id_ctrl),
1500 &dma_addr, GFP_KERNEL);
1501 if (mem == NULL) {
1502 res = -ENOMEM;
1503 goto out;
1504 }
1505 nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
1506 res = nvme_trans_status_code(hdr, nvme_sc);
1507 if (res)
1508 goto out_dma;
1509 if (nvme_sc) {
1510 res = nvme_sc;
1511 goto out_dma;
1512 }
1513 id_ctrl = mem;
1514 lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
1515
1516 switch (pc) {
1517 case NVME_POWER_STATE_START_VALID:
1518 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1519 if (pcmod == 0 && start == 0x1)
1520 ps_desired = POWER_STATE_0;
1521 if (pcmod == 0 && start == 0x0)
1522 ps_desired = lowest_pow_st;
1523 break;
1524 case NVME_POWER_STATE_ACTIVE:
1525 /* Action unspecified if POWER CONDITION MODIFIER != 0 */
1526 if (pcmod == 0)
1527 ps_desired = POWER_STATE_0;
1528 break;
1529 case NVME_POWER_STATE_IDLE:
1530 /* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
1531 if (pcmod == 0x0)
1532 ps_desired = POWER_STATE_1;
1533 else if (pcmod == 0x1)
1534 ps_desired = POWER_STATE_2;
1535 else if (pcmod == 0x2)
1536 ps_desired = POWER_STATE_3;
1537 break;
1538 case NVME_POWER_STATE_STANDBY:
1539 /* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
1540 if (pcmod == 0x0)
1541 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 2));
1542 else if (pcmod == 0x1)
1543 ps_desired = max(POWER_STATE_0, (lowest_pow_st - 1));
1544 break;
1545 case NVME_POWER_STATE_LU_CONTROL:
1546 default:
1547 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1548 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1549 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1550 break;
1551 }
1552 nvme_sc = nvme_set_features(dev, NVME_FEAT_POWER_MGMT, ps_desired, 0,
1553 NULL);
1554 res = nvme_trans_status_code(hdr, nvme_sc);
1555 if (res)
1556 goto out_dma;
1557 if (nvme_sc)
1558 res = nvme_sc;
1559 out_dma:
1560 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
1561 dma_addr);
1562 out:
1563 return res;
1564 }
1565
1566 /* Write Buffer Helper Functions */
1567 /* Also using this for Format Unit with hdr passed as NULL, and buffer_id, 0 */
1568
nvme_trans_send_fw_cmd(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 opcode,u32 tot_len,u32 offset,u8 buffer_id)1569 static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1570 u8 opcode, u32 tot_len, u32 offset,
1571 u8 buffer_id)
1572 {
1573 int res = SNTI_TRANSLATION_SUCCESS;
1574 int nvme_sc;
1575 struct nvme_dev *dev = ns->dev;
1576 struct nvme_command c;
1577 struct nvme_iod *iod = NULL;
1578 unsigned length;
1579
1580 memset(&c, 0, sizeof(c));
1581 c.common.opcode = opcode;
1582 if (opcode == nvme_admin_download_fw) {
1583 if (hdr->iovec_count > 0) {
1584 /* Assuming SGL is not allowed for this command */
1585 res = nvme_trans_completion(hdr,
1586 SAM_STAT_CHECK_CONDITION,
1587 ILLEGAL_REQUEST,
1588 SCSI_ASC_INVALID_CDB,
1589 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1590 goto out;
1591 }
1592 iod = nvme_map_user_pages(dev, DMA_TO_DEVICE,
1593 (unsigned long)hdr->dxferp, tot_len);
1594 if (IS_ERR(iod)) {
1595 res = PTR_ERR(iod);
1596 goto out;
1597 }
1598 length = nvme_setup_prps(dev, iod, tot_len, GFP_KERNEL);
1599 if (length != tot_len) {
1600 res = -ENOMEM;
1601 goto out_unmap;
1602 }
1603
1604 c.dlfw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
1605 c.dlfw.prp2 = cpu_to_le64(iod->first_dma);
1606 c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
1607 c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
1608 } else if (opcode == nvme_admin_activate_fw) {
1609 u32 cdw10 = buffer_id | NVME_FWACT_REPL_ACTV;
1610 c.common.cdw10[0] = cpu_to_le32(cdw10);
1611 }
1612
1613 nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
1614 res = nvme_trans_status_code(hdr, nvme_sc);
1615 if (res)
1616 goto out_unmap;
1617 if (nvme_sc)
1618 res = nvme_sc;
1619
1620 out_unmap:
1621 if (opcode == nvme_admin_download_fw) {
1622 nvme_unmap_user_pages(dev, DMA_TO_DEVICE, iod);
1623 nvme_free_iod(dev, iod);
1624 }
1625 out:
1626 return res;
1627 }
1628
1629 /* Mode Select Helper Functions */
1630
nvme_trans_modesel_get_bd_len(u8 * parm_list,u8 cdb10,u16 * bd_len,u8 * llbaa)1631 static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10,
1632 u16 *bd_len, u8 *llbaa)
1633 {
1634 if (cdb10) {
1635 /* 10 Byte CDB */
1636 *bd_len = (parm_list[MODE_SELECT_10_BD_OFFSET] << 8) +
1637 parm_list[MODE_SELECT_10_BD_OFFSET + 1];
1638 *llbaa = parm_list[MODE_SELECT_10_LLBAA_OFFSET] &
1639 MODE_SELECT_10_LLBAA_MASK;
1640 } else {
1641 /* 6 Byte CDB */
1642 *bd_len = parm_list[MODE_SELECT_6_BD_OFFSET];
1643 }
1644 }
1645
nvme_trans_modesel_save_bd(struct nvme_ns * ns,u8 * parm_list,u16 idx,u16 bd_len,u8 llbaa)1646 static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list,
1647 u16 idx, u16 bd_len, u8 llbaa)
1648 {
1649 u16 bd_num;
1650
1651 bd_num = bd_len / ((llbaa == 0) ?
1652 SHORT_DESC_BLOCK : LONG_DESC_BLOCK);
1653 /* Store block descriptor info if a FORMAT UNIT comes later */
1654 /* TODO Saving 1st BD info; what to do if multiple BD received? */
1655 if (llbaa == 0) {
1656 /* Standard Block Descriptor - spc4r34 7.5.5.1 */
1657 ns->mode_select_num_blocks =
1658 (parm_list[idx + 1] << 16) +
1659 (parm_list[idx + 2] << 8) +
1660 (parm_list[idx + 3]);
1661
1662 ns->mode_select_block_len =
1663 (parm_list[idx + 5] << 16) +
1664 (parm_list[idx + 6] << 8) +
1665 (parm_list[idx + 7]);
1666 } else {
1667 /* Long LBA Block Descriptor - sbc3r27 6.4.2.3 */
1668 ns->mode_select_num_blocks =
1669 (((u64)parm_list[idx + 0]) << 56) +
1670 (((u64)parm_list[idx + 1]) << 48) +
1671 (((u64)parm_list[idx + 2]) << 40) +
1672 (((u64)parm_list[idx + 3]) << 32) +
1673 (((u64)parm_list[idx + 4]) << 24) +
1674 (((u64)parm_list[idx + 5]) << 16) +
1675 (((u64)parm_list[idx + 6]) << 8) +
1676 ((u64)parm_list[idx + 7]);
1677
1678 ns->mode_select_block_len =
1679 (parm_list[idx + 12] << 24) +
1680 (parm_list[idx + 13] << 16) +
1681 (parm_list[idx + 14] << 8) +
1682 (parm_list[idx + 15]);
1683 }
1684 }
1685
nvme_trans_modesel_get_mp(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * mode_page,u8 page_code)1686 static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1687 u8 *mode_page, u8 page_code)
1688 {
1689 int res = SNTI_TRANSLATION_SUCCESS;
1690 int nvme_sc;
1691 struct nvme_dev *dev = ns->dev;
1692 unsigned dword11;
1693
1694 switch (page_code) {
1695 case MODE_PAGE_CACHING:
1696 dword11 = ((mode_page[2] & CACHING_MODE_PAGE_WCE_MASK) ? 1 : 0);
1697 nvme_sc = nvme_set_features(dev, NVME_FEAT_VOLATILE_WC, dword11,
1698 0, NULL);
1699 res = nvme_trans_status_code(hdr, nvme_sc);
1700 if (res)
1701 break;
1702 if (nvme_sc) {
1703 res = nvme_sc;
1704 break;
1705 }
1706 break;
1707 case MODE_PAGE_CONTROL:
1708 break;
1709 case MODE_PAGE_POWER_CONDITION:
1710 /* Verify the OS is not trying to set timers */
1711 if ((mode_page[2] & 0x01) != 0 || (mode_page[3] & 0x0F) != 0) {
1712 res = nvme_trans_completion(hdr,
1713 SAM_STAT_CHECK_CONDITION,
1714 ILLEGAL_REQUEST,
1715 SCSI_ASC_INVALID_PARAMETER,
1716 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1717 if (!res)
1718 res = SNTI_INTERNAL_ERROR;
1719 break;
1720 }
1721 break;
1722 default:
1723 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1724 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1725 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1726 if (!res)
1727 res = SNTI_INTERNAL_ERROR;
1728 break;
1729 }
1730
1731 return res;
1732 }
1733
nvme_trans_modesel_data(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd,u16 parm_list_len,u8 pf,u8 sp,u8 cdb10)1734 static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1735 u8 *cmd, u16 parm_list_len, u8 pf,
1736 u8 sp, u8 cdb10)
1737 {
1738 int res = SNTI_TRANSLATION_SUCCESS;
1739 u8 *parm_list;
1740 u16 bd_len;
1741 u8 llbaa = 0;
1742 u16 index, saved_index;
1743 u8 page_code;
1744 u16 mp_size;
1745
1746 /* Get parm list from data-in/out buffer */
1747 parm_list = kmalloc(parm_list_len, GFP_KERNEL);
1748 if (parm_list == NULL) {
1749 res = -ENOMEM;
1750 goto out;
1751 }
1752
1753 res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);
1754 if (res != SNTI_TRANSLATION_SUCCESS)
1755 goto out_mem;
1756
1757 nvme_trans_modesel_get_bd_len(parm_list, cdb10, &bd_len, &llbaa);
1758 index = (cdb10) ? (MODE_SELECT_10_MPH_SIZE) : (MODE_SELECT_6_MPH_SIZE);
1759
1760 if (bd_len != 0) {
1761 /* Block Descriptors present, parse */
1762 nvme_trans_modesel_save_bd(ns, parm_list, index, bd_len, llbaa);
1763 index += bd_len;
1764 }
1765 saved_index = index;
1766
1767 /* Multiple mode pages may be present; iterate through all */
1768 /* In 1st Iteration, don't do NVME Command, only check for CDB errors */
1769 do {
1770 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1771 mp_size = parm_list[index + 1] + 2;
1772 if ((page_code != MODE_PAGE_CACHING) &&
1773 (page_code != MODE_PAGE_CONTROL) &&
1774 (page_code != MODE_PAGE_POWER_CONDITION)) {
1775 res = nvme_trans_completion(hdr,
1776 SAM_STAT_CHECK_CONDITION,
1777 ILLEGAL_REQUEST,
1778 SCSI_ASC_INVALID_CDB,
1779 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1780 goto out_mem;
1781 }
1782 index += mp_size;
1783 } while (index < parm_list_len);
1784
1785 /* In 2nd Iteration, do the NVME Commands */
1786 index = saved_index;
1787 do {
1788 page_code = parm_list[index] & MODE_SELECT_PAGE_CODE_MASK;
1789 mp_size = parm_list[index + 1] + 2;
1790 res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],
1791 page_code);
1792 if (res != SNTI_TRANSLATION_SUCCESS)
1793 break;
1794 index += mp_size;
1795 } while (index < parm_list_len);
1796
1797 out_mem:
1798 kfree(parm_list);
1799 out:
1800 return res;
1801 }
1802
1803 /* Format Unit Helper Functions */
1804
nvme_trans_fmt_set_blk_size_count(struct nvme_ns * ns,struct sg_io_hdr * hdr)1805 static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
1806 struct sg_io_hdr *hdr)
1807 {
1808 int res = SNTI_TRANSLATION_SUCCESS;
1809 int nvme_sc;
1810 struct nvme_dev *dev = ns->dev;
1811 dma_addr_t dma_addr;
1812 void *mem;
1813 struct nvme_id_ns *id_ns;
1814 u8 flbas;
1815
1816 /*
1817 * SCSI Expects a MODE SELECT would have been issued prior to
1818 * a FORMAT UNIT, and the block size and number would be used
1819 * from the block descriptor in it. If a MODE SELECT had not
1820 * been issued, FORMAT shall use the current values for both.
1821 */
1822
1823 if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
1824 mem = dma_alloc_coherent(&dev->pci_dev->dev,
1825 sizeof(struct nvme_id_ns), &dma_addr, GFP_KERNEL);
1826 if (mem == NULL) {
1827 res = -ENOMEM;
1828 goto out;
1829 }
1830 /* nvme ns identify */
1831 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1832 res = nvme_trans_status_code(hdr, nvme_sc);
1833 if (res)
1834 goto out_dma;
1835 if (nvme_sc) {
1836 res = nvme_sc;
1837 goto out_dma;
1838 }
1839 id_ns = mem;
1840
1841 if (ns->mode_select_num_blocks == 0)
1842 ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
1843 if (ns->mode_select_block_len == 0) {
1844 flbas = (id_ns->flbas) & 0x0F;
1845 ns->mode_select_block_len =
1846 (1 << (id_ns->lbaf[flbas].ds));
1847 }
1848 out_dma:
1849 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1850 mem, dma_addr);
1851 }
1852 out:
1853 return res;
1854 }
1855
nvme_trans_fmt_get_parm_header(struct sg_io_hdr * hdr,u8 len,u8 format_prot_info,u8 * nvme_pf_code)1856 static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
1857 u8 format_prot_info, u8 *nvme_pf_code)
1858 {
1859 int res = SNTI_TRANSLATION_SUCCESS;
1860 u8 *parm_list;
1861 u8 pf_usage, pf_code;
1862
1863 parm_list = kmalloc(len, GFP_KERNEL);
1864 if (parm_list == NULL) {
1865 res = -ENOMEM;
1866 goto out;
1867 }
1868 res = nvme_trans_copy_from_user(hdr, parm_list, len);
1869 if (res != SNTI_TRANSLATION_SUCCESS)
1870 goto out_mem;
1871
1872 if ((parm_list[FORMAT_UNIT_IMMED_OFFSET] &
1873 FORMAT_UNIT_IMMED_MASK) != 0) {
1874 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1875 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1876 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1877 goto out_mem;
1878 }
1879
1880 if (len == FORMAT_UNIT_LONG_PARM_LIST_LEN &&
1881 (parm_list[FORMAT_UNIT_PROT_INT_OFFSET] & 0x0F) != 0) {
1882 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1883 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1884 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1885 goto out_mem;
1886 }
1887 pf_usage = parm_list[FORMAT_UNIT_PROT_FIELD_USAGE_OFFSET] &
1888 FORMAT_UNIT_PROT_FIELD_USAGE_MASK;
1889 pf_code = (pf_usage << 2) | format_prot_info;
1890 switch (pf_code) {
1891 case 0:
1892 *nvme_pf_code = 0;
1893 break;
1894 case 2:
1895 *nvme_pf_code = 1;
1896 break;
1897 case 3:
1898 *nvme_pf_code = 2;
1899 break;
1900 case 7:
1901 *nvme_pf_code = 3;
1902 break;
1903 default:
1904 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1905 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
1906 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1907 break;
1908 }
1909
1910 out_mem:
1911 kfree(parm_list);
1912 out:
1913 return res;
1914 }
1915
nvme_trans_fmt_send_cmd(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 prot_info)1916 static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
1917 u8 prot_info)
1918 {
1919 int res = SNTI_TRANSLATION_SUCCESS;
1920 int nvme_sc;
1921 struct nvme_dev *dev = ns->dev;
1922 dma_addr_t dma_addr;
1923 void *mem;
1924 struct nvme_id_ns *id_ns;
1925 u8 i;
1926 u8 flbas, nlbaf;
1927 u8 selected_lbaf = 0xFF;
1928 u32 cdw10 = 0;
1929 struct nvme_command c;
1930
1931 /* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
1932 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
1933 &dma_addr, GFP_KERNEL);
1934 if (mem == NULL) {
1935 res = -ENOMEM;
1936 goto out;
1937 }
1938 /* nvme ns identify */
1939 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
1940 res = nvme_trans_status_code(hdr, nvme_sc);
1941 if (res)
1942 goto out_dma;
1943 if (nvme_sc) {
1944 res = nvme_sc;
1945 goto out_dma;
1946 }
1947 id_ns = mem;
1948 flbas = (id_ns->flbas) & 0x0F;
1949 nlbaf = id_ns->nlbaf;
1950
1951 for (i = 0; i < nlbaf; i++) {
1952 if (ns->mode_select_block_len == (1 << (id_ns->lbaf[i].ds))) {
1953 selected_lbaf = i;
1954 break;
1955 }
1956 }
1957 if (selected_lbaf > 0x0F) {
1958 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1959 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1960 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1961 }
1962 if (ns->mode_select_num_blocks != le64_to_cpu(id_ns->ncap)) {
1963 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
1964 ILLEGAL_REQUEST, SCSI_ASC_INVALID_PARAMETER,
1965 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
1966 }
1967
1968 cdw10 |= prot_info << 5;
1969 cdw10 |= selected_lbaf & 0x0F;
1970 memset(&c, 0, sizeof(c));
1971 c.format.opcode = nvme_admin_format_nvm;
1972 c.format.nsid = cpu_to_le32(ns->ns_id);
1973 c.format.cdw10 = cpu_to_le32(cdw10);
1974
1975 nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
1976 res = nvme_trans_status_code(hdr, nvme_sc);
1977 if (res)
1978 goto out_dma;
1979 if (nvme_sc)
1980 res = nvme_sc;
1981
1982 out_dma:
1983 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
1984 dma_addr);
1985 out:
1986 return res;
1987 }
1988
1989 /* Read/Write Helper Functions */
1990
nvme_trans_get_io_cdb6(u8 * cmd,struct nvme_trans_io_cdb * cdb_info)1991 static inline void nvme_trans_get_io_cdb6(u8 *cmd,
1992 struct nvme_trans_io_cdb *cdb_info)
1993 {
1994 cdb_info->fua = 0;
1995 cdb_info->prot_info = 0;
1996 cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_6_CDB_LBA_OFFSET) &
1997 IO_6_CDB_LBA_MASK;
1998 cdb_info->xfer_len = GET_U8_FROM_CDB(cmd, IO_6_CDB_TX_LEN_OFFSET);
1999
2000 /* sbc3r27 sec 5.32 - TRANSFER LEN of 0 implies a 256 Block transfer */
2001 if (cdb_info->xfer_len == 0)
2002 cdb_info->xfer_len = IO_6_DEFAULT_TX_LEN;
2003 }
2004
nvme_trans_get_io_cdb10(u8 * cmd,struct nvme_trans_io_cdb * cdb_info)2005 static inline void nvme_trans_get_io_cdb10(u8 *cmd,
2006 struct nvme_trans_io_cdb *cdb_info)
2007 {
2008 cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_10_CDB_FUA_OFFSET) &
2009 IO_CDB_FUA_MASK;
2010 cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_10_CDB_WP_OFFSET) &
2011 IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
2012 cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_10_CDB_LBA_OFFSET);
2013 cdb_info->xfer_len = GET_U16_FROM_CDB(cmd, IO_10_CDB_TX_LEN_OFFSET);
2014 }
2015
nvme_trans_get_io_cdb12(u8 * cmd,struct nvme_trans_io_cdb * cdb_info)2016 static inline void nvme_trans_get_io_cdb12(u8 *cmd,
2017 struct nvme_trans_io_cdb *cdb_info)
2018 {
2019 cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_12_CDB_FUA_OFFSET) &
2020 IO_CDB_FUA_MASK;
2021 cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_12_CDB_WP_OFFSET) &
2022 IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
2023 cdb_info->lba = GET_U32_FROM_CDB(cmd, IO_12_CDB_LBA_OFFSET);
2024 cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_12_CDB_TX_LEN_OFFSET);
2025 }
2026
nvme_trans_get_io_cdb16(u8 * cmd,struct nvme_trans_io_cdb * cdb_info)2027 static inline void nvme_trans_get_io_cdb16(u8 *cmd,
2028 struct nvme_trans_io_cdb *cdb_info)
2029 {
2030 cdb_info->fua = GET_U8_FROM_CDB(cmd, IO_16_CDB_FUA_OFFSET) &
2031 IO_CDB_FUA_MASK;
2032 cdb_info->prot_info = GET_U8_FROM_CDB(cmd, IO_16_CDB_WP_OFFSET) &
2033 IO_CDB_WP_MASK >> IO_CDB_WP_SHIFT;
2034 cdb_info->lba = GET_U64_FROM_CDB(cmd, IO_16_CDB_LBA_OFFSET);
2035 cdb_info->xfer_len = GET_U32_FROM_CDB(cmd, IO_16_CDB_TX_LEN_OFFSET);
2036 }
2037
nvme_trans_io_get_num_cmds(struct sg_io_hdr * hdr,struct nvme_trans_io_cdb * cdb_info,u32 max_blocks)2038 static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,
2039 struct nvme_trans_io_cdb *cdb_info,
2040 u32 max_blocks)
2041 {
2042 /* If using iovecs, send one nvme command per vector */
2043 if (hdr->iovec_count > 0)
2044 return hdr->iovec_count;
2045 else if (cdb_info->xfer_len > max_blocks)
2046 return ((cdb_info->xfer_len - 1) / max_blocks) + 1;
2047 else
2048 return 1;
2049 }
2050
nvme_trans_io_get_control(struct nvme_ns * ns,struct nvme_trans_io_cdb * cdb_info)2051 static u16 nvme_trans_io_get_control(struct nvme_ns *ns,
2052 struct nvme_trans_io_cdb *cdb_info)
2053 {
2054 u16 control = 0;
2055
2056 /* When Protection information support is added, implement here */
2057
2058 if (cdb_info->fua > 0)
2059 control |= NVME_RW_FUA;
2060
2061 return control;
2062 }
2063
nvme_trans_do_nvme_io(struct nvme_ns * ns,struct sg_io_hdr * hdr,struct nvme_trans_io_cdb * cdb_info,u8 is_write)2064 static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2065 struct nvme_trans_io_cdb *cdb_info, u8 is_write)
2066 {
2067 int res = SNTI_TRANSLATION_SUCCESS;
2068 int nvme_sc;
2069 struct nvme_dev *dev = ns->dev;
2070 u32 num_cmds;
2071 struct nvme_iod *iod;
2072 u64 unit_len;
2073 u64 unit_num_blocks; /* Number of blocks to xfer in each nvme cmd */
2074 u32 retcode;
2075 u32 i = 0;
2076 u64 nvme_offset = 0;
2077 void __user *next_mapping_addr;
2078 struct nvme_command c;
2079 u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
2080 u16 control;
2081 u32 max_blocks = queue_max_hw_sectors(ns->queue);
2082
2083 num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
2084
2085 /*
2086 * This loop handles two cases.
2087 * First, when an SGL is used in the form of an iovec list:
2088 * - Use iov_base as the next mapping address for the nvme command_id
2089 * - Use iov_len as the data transfer length for the command.
2090 * Second, when we have a single buffer
2091 * - If larger than max_blocks, split into chunks, offset
2092 * each nvme command accordingly.
2093 */
2094 for (i = 0; i < num_cmds; i++) {
2095 memset(&c, 0, sizeof(c));
2096 if (hdr->iovec_count > 0) {
2097 struct sg_iovec sgl;
2098
2099 retcode = copy_from_user(&sgl, hdr->dxferp +
2100 i * sizeof(struct sg_iovec),
2101 sizeof(struct sg_iovec));
2102 if (retcode)
2103 return -EFAULT;
2104 unit_len = sgl.iov_len;
2105 unit_num_blocks = unit_len >> ns->lba_shift;
2106 next_mapping_addr = sgl.iov_base;
2107 } else {
2108 unit_num_blocks = min((u64)max_blocks,
2109 (cdb_info->xfer_len - nvme_offset));
2110 unit_len = unit_num_blocks << ns->lba_shift;
2111 next_mapping_addr = hdr->dxferp +
2112 ((1 << ns->lba_shift) * nvme_offset);
2113 }
2114
2115 c.rw.opcode = opcode;
2116 c.rw.nsid = cpu_to_le32(ns->ns_id);
2117 c.rw.slba = cpu_to_le64(cdb_info->lba + nvme_offset);
2118 c.rw.length = cpu_to_le16(unit_num_blocks - 1);
2119 control = nvme_trans_io_get_control(ns, cdb_info);
2120 c.rw.control = cpu_to_le16(control);
2121
2122 iod = nvme_map_user_pages(dev,
2123 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2124 (unsigned long)next_mapping_addr, unit_len);
2125 if (IS_ERR(iod)) {
2126 res = PTR_ERR(iod);
2127 goto out;
2128 }
2129 retcode = nvme_setup_prps(dev, iod, unit_len, GFP_KERNEL);
2130 if (retcode != unit_len) {
2131 nvme_unmap_user_pages(dev,
2132 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2133 iod);
2134 nvme_free_iod(dev, iod);
2135 res = -ENOMEM;
2136 goto out;
2137 }
2138 c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
2139 c.rw.prp2 = cpu_to_le64(iod->first_dma);
2140
2141 nvme_offset += unit_num_blocks;
2142
2143 nvme_sc = nvme_submit_io_cmd(dev, ns, &c, NULL);
2144 if (nvme_sc != NVME_SC_SUCCESS) {
2145 nvme_unmap_user_pages(dev,
2146 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2147 iod);
2148 nvme_free_iod(dev, iod);
2149 res = nvme_trans_status_code(hdr, nvme_sc);
2150 goto out;
2151 }
2152 nvme_unmap_user_pages(dev,
2153 (is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
2154 iod);
2155 nvme_free_iod(dev, iod);
2156 }
2157 res = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
2158
2159 out:
2160 return res;
2161 }
2162
2163
2164 /* SCSI Command Translation Functions */
2165
nvme_trans_io(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 is_write,u8 * cmd)2166 static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,
2167 u8 *cmd)
2168 {
2169 int res = SNTI_TRANSLATION_SUCCESS;
2170 struct nvme_trans_io_cdb cdb_info;
2171 u8 opcode = cmd[0];
2172 u64 xfer_bytes;
2173 u64 sum_iov_len = 0;
2174 struct sg_iovec sgl;
2175 int i;
2176 size_t not_copied;
2177
2178 /* Extract Fields from CDB */
2179 switch (opcode) {
2180 case WRITE_6:
2181 case READ_6:
2182 nvme_trans_get_io_cdb6(cmd, &cdb_info);
2183 break;
2184 case WRITE_10:
2185 case READ_10:
2186 nvme_trans_get_io_cdb10(cmd, &cdb_info);
2187 break;
2188 case WRITE_12:
2189 case READ_12:
2190 nvme_trans_get_io_cdb12(cmd, &cdb_info);
2191 break;
2192 case WRITE_16:
2193 case READ_16:
2194 nvme_trans_get_io_cdb16(cmd, &cdb_info);
2195 break;
2196 default:
2197 /* Will never really reach here */
2198 res = SNTI_INTERNAL_ERROR;
2199 goto out;
2200 }
2201
2202 /* Calculate total length of transfer (in bytes) */
2203 if (hdr->iovec_count > 0) {
2204 for (i = 0; i < hdr->iovec_count; i++) {
2205 not_copied = copy_from_user(&sgl, hdr->dxferp +
2206 i * sizeof(struct sg_iovec),
2207 sizeof(struct sg_iovec));
2208 if (not_copied)
2209 return -EFAULT;
2210 sum_iov_len += sgl.iov_len;
2211 /* IO vector sizes should be multiples of block size */
2212 if (sgl.iov_len % (1 << ns->lba_shift) != 0) {
2213 res = nvme_trans_completion(hdr,
2214 SAM_STAT_CHECK_CONDITION,
2215 ILLEGAL_REQUEST,
2216 SCSI_ASC_INVALID_PARAMETER,
2217 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2218 goto out;
2219 }
2220 }
2221 } else {
2222 sum_iov_len = hdr->dxfer_len;
2223 }
2224
2225 /* As Per sg ioctl howto, if the lengths differ, use the lower one */
2226 xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);
2227
2228 /* If block count and actual data buffer size dont match, error out */
2229 if (xfer_bytes != (cdb_info.xfer_len << ns->lba_shift)) {
2230 res = -EINVAL;
2231 goto out;
2232 }
2233
2234 /* Check for 0 length transfer - it is not illegal */
2235 if (cdb_info.xfer_len == 0)
2236 goto out;
2237
2238 /* Send NVMe IO Command(s) */
2239 res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);
2240 if (res != SNTI_TRANSLATION_SUCCESS)
2241 goto out;
2242
2243 out:
2244 return res;
2245 }
2246
nvme_trans_inquiry(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2247 static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2248 u8 *cmd)
2249 {
2250 int res = SNTI_TRANSLATION_SUCCESS;
2251 u8 evpd;
2252 u8 page_code;
2253 int alloc_len;
2254 u8 *inq_response;
2255
2256 evpd = GET_INQ_EVPD_BIT(cmd);
2257 page_code = GET_INQ_PAGE_CODE(cmd);
2258 alloc_len = GET_INQ_ALLOC_LENGTH(cmd);
2259
2260 inq_response = kmalloc(max(alloc_len, STANDARD_INQUIRY_LENGTH),
2261 GFP_KERNEL);
2262 if (inq_response == NULL) {
2263 res = -ENOMEM;
2264 goto out_mem;
2265 }
2266
2267 if (evpd == 0) {
2268 if (page_code == INQ_STANDARD_INQUIRY_PAGE) {
2269 res = nvme_trans_standard_inquiry_page(ns, hdr,
2270 inq_response, alloc_len);
2271 } else {
2272 res = nvme_trans_completion(hdr,
2273 SAM_STAT_CHECK_CONDITION,
2274 ILLEGAL_REQUEST,
2275 SCSI_ASC_INVALID_CDB,
2276 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2277 }
2278 } else {
2279 switch (page_code) {
2280 case VPD_SUPPORTED_PAGES:
2281 res = nvme_trans_supported_vpd_pages(ns, hdr,
2282 inq_response, alloc_len);
2283 break;
2284 case VPD_SERIAL_NUMBER:
2285 res = nvme_trans_unit_serial_page(ns, hdr, inq_response,
2286 alloc_len);
2287 break;
2288 case VPD_DEVICE_IDENTIFIERS:
2289 res = nvme_trans_device_id_page(ns, hdr, inq_response,
2290 alloc_len);
2291 break;
2292 case VPD_EXTENDED_INQUIRY:
2293 res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
2294 break;
2295 case VPD_BLOCK_LIMITS:
2296 res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
2297 alloc_len);
2298 break;
2299 case VPD_BLOCK_DEV_CHARACTERISTICS:
2300 res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
2301 break;
2302 default:
2303 res = nvme_trans_completion(hdr,
2304 SAM_STAT_CHECK_CONDITION,
2305 ILLEGAL_REQUEST,
2306 SCSI_ASC_INVALID_CDB,
2307 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2308 break;
2309 }
2310 }
2311 kfree(inq_response);
2312 out_mem:
2313 return res;
2314 }
2315
nvme_trans_log_sense(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2316 static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2317 u8 *cmd)
2318 {
2319 int res = SNTI_TRANSLATION_SUCCESS;
2320 u16 alloc_len;
2321 u8 sp;
2322 u8 pc;
2323 u8 page_code;
2324
2325 sp = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_SP_OFFSET);
2326 if (sp != LOG_SENSE_CDB_SP_NOT_ENABLED) {
2327 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2328 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2329 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2330 goto out;
2331 }
2332 pc = GET_U8_FROM_CDB(cmd, LOG_SENSE_CDB_PC_OFFSET);
2333 page_code = pc & LOG_SENSE_CDB_PAGE_CODE_MASK;
2334 pc = (pc & LOG_SENSE_CDB_PC_MASK) >> LOG_SENSE_CDB_PC_SHIFT;
2335 if (pc != LOG_SENSE_CDB_PC_CUMULATIVE_VALUES) {
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 }
2341 alloc_len = GET_U16_FROM_CDB(cmd, LOG_SENSE_CDB_ALLOC_LENGTH_OFFSET);
2342 switch (page_code) {
2343 case LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE:
2344 res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);
2345 break;
2346 case LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE:
2347 res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);
2348 break;
2349 case LOG_PAGE_TEMPERATURE_PAGE:
2350 res = nvme_trans_log_temperature(ns, hdr, alloc_len);
2351 break;
2352 default:
2353 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2354 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2355 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2356 break;
2357 }
2358
2359 out:
2360 return res;
2361 }
2362
nvme_trans_mode_select(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2363 static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2364 u8 *cmd)
2365 {
2366 int res = SNTI_TRANSLATION_SUCCESS;
2367 u8 cdb10 = 0;
2368 u16 parm_list_len;
2369 u8 page_format;
2370 u8 save_pages;
2371
2372 page_format = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_PAGE_FORMAT_OFFSET);
2373 page_format &= MODE_SELECT_CDB_PAGE_FORMAT_MASK;
2374
2375 save_pages = GET_U8_FROM_CDB(cmd, MODE_SELECT_CDB_SAVE_PAGES_OFFSET);
2376 save_pages &= MODE_SELECT_CDB_SAVE_PAGES_MASK;
2377
2378 if (GET_OPCODE(cmd) == MODE_SELECT) {
2379 parm_list_len = GET_U8_FROM_CDB(cmd,
2380 MODE_SELECT_6_CDB_PARAM_LIST_LENGTH_OFFSET);
2381 } else {
2382 parm_list_len = GET_U16_FROM_CDB(cmd,
2383 MODE_SELECT_10_CDB_PARAM_LIST_LENGTH_OFFSET);
2384 cdb10 = 1;
2385 }
2386
2387 if (parm_list_len != 0) {
2388 /*
2389 * According to SPC-4 r24, a paramter list length field of 0
2390 * shall not be considered an error
2391 */
2392 res = nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,
2393 page_format, save_pages, cdb10);
2394 }
2395
2396 return res;
2397 }
2398
nvme_trans_mode_sense(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2399 static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2400 u8 *cmd)
2401 {
2402 int res = SNTI_TRANSLATION_SUCCESS;
2403 u16 alloc_len;
2404 u8 cdb10 = 0;
2405 u8 page_code;
2406 u8 pc;
2407
2408 if (GET_OPCODE(cmd) == MODE_SENSE) {
2409 alloc_len = GET_U8_FROM_CDB(cmd, MODE_SENSE6_ALLOC_LEN_OFFSET);
2410 } else {
2411 alloc_len = GET_U16_FROM_CDB(cmd,
2412 MODE_SENSE10_ALLOC_LEN_OFFSET);
2413 cdb10 = 1;
2414 }
2415
2416 pc = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CONTROL_OFFSET) &
2417 MODE_SENSE_PAGE_CONTROL_MASK;
2418 if (pc != MODE_SENSE_PC_CURRENT_VALUES) {
2419 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2420 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2421 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2422 goto out;
2423 }
2424
2425 page_code = GET_U8_FROM_CDB(cmd, MODE_SENSE_PAGE_CODE_OFFSET) &
2426 MODE_SENSE_PAGE_CODE_MASK;
2427 switch (page_code) {
2428 case MODE_PAGE_CACHING:
2429 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2430 cdb10,
2431 &nvme_trans_fill_caching_page,
2432 MODE_PAGE_CACHING_LEN);
2433 break;
2434 case MODE_PAGE_CONTROL:
2435 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2436 cdb10,
2437 &nvme_trans_fill_control_page,
2438 MODE_PAGE_CONTROL_LEN);
2439 break;
2440 case MODE_PAGE_POWER_CONDITION:
2441 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2442 cdb10,
2443 &nvme_trans_fill_pow_cnd_page,
2444 MODE_PAGE_POW_CND_LEN);
2445 break;
2446 case MODE_PAGE_INFO_EXCEP:
2447 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2448 cdb10,
2449 &nvme_trans_fill_inf_exc_page,
2450 MODE_PAGE_INF_EXC_LEN);
2451 break;
2452 case MODE_PAGE_RETURN_ALL:
2453 res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,
2454 cdb10,
2455 &nvme_trans_fill_all_pages,
2456 MODE_PAGE_ALL_LEN);
2457 break;
2458 default:
2459 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2460 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2461 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2462 break;
2463 }
2464
2465 out:
2466 return res;
2467 }
2468
nvme_trans_read_capacity(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2469 static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2470 u8 *cmd)
2471 {
2472 int res = SNTI_TRANSLATION_SUCCESS;
2473 int nvme_sc;
2474 u32 alloc_len = READ_CAP_10_RESP_SIZE;
2475 u32 resp_size = READ_CAP_10_RESP_SIZE;
2476 u32 xfer_len;
2477 u8 cdb16;
2478 struct nvme_dev *dev = ns->dev;
2479 dma_addr_t dma_addr;
2480 void *mem;
2481 struct nvme_id_ns *id_ns;
2482 u8 *response;
2483
2484 cdb16 = IS_READ_CAP_16(cmd);
2485 if (cdb16) {
2486 alloc_len = GET_READ_CAP_16_ALLOC_LENGTH(cmd);
2487 resp_size = READ_CAP_16_RESP_SIZE;
2488 }
2489
2490 mem = dma_alloc_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns),
2491 &dma_addr, GFP_KERNEL);
2492 if (mem == NULL) {
2493 res = -ENOMEM;
2494 goto out;
2495 }
2496 /* nvme ns identify */
2497 nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
2498 res = nvme_trans_status_code(hdr, nvme_sc);
2499 if (res)
2500 goto out_dma;
2501 if (nvme_sc) {
2502 res = nvme_sc;
2503 goto out_dma;
2504 }
2505 id_ns = mem;
2506
2507 response = kzalloc(resp_size, GFP_KERNEL);
2508 if (response == NULL) {
2509 res = -ENOMEM;
2510 goto out_dma;
2511 }
2512 nvme_trans_fill_read_cap(response, id_ns, cdb16);
2513
2514 xfer_len = min(alloc_len, resp_size);
2515 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2516
2517 kfree(response);
2518 out_dma:
2519 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ns), mem,
2520 dma_addr);
2521 out:
2522 return res;
2523 }
2524
nvme_trans_report_luns(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2525 static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2526 u8 *cmd)
2527 {
2528 int res = SNTI_TRANSLATION_SUCCESS;
2529 int nvme_sc;
2530 u32 alloc_len, xfer_len, resp_size;
2531 u8 select_report;
2532 u8 *response;
2533 struct nvme_dev *dev = ns->dev;
2534 dma_addr_t dma_addr;
2535 void *mem;
2536 struct nvme_id_ctrl *id_ctrl;
2537 u32 ll_length, lun_id;
2538 u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
2539 __be32 tmp_len;
2540
2541 alloc_len = GET_REPORT_LUNS_ALLOC_LENGTH(cmd);
2542 select_report = GET_U8_FROM_CDB(cmd, REPORT_LUNS_SR_OFFSET);
2543
2544 if ((select_report != ALL_LUNS_RETURNED) &&
2545 (select_report != ALL_WELL_KNOWN_LUNS_RETURNED) &&
2546 (select_report != RESTRICTED_LUNS_RETURNED)) {
2547 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2548 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2549 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2550 goto out;
2551 } else {
2552 /* NVMe Controller Identify */
2553 mem = dma_alloc_coherent(&dev->pci_dev->dev,
2554 sizeof(struct nvme_id_ctrl),
2555 &dma_addr, GFP_KERNEL);
2556 if (mem == NULL) {
2557 res = -ENOMEM;
2558 goto out;
2559 }
2560 nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
2561 res = nvme_trans_status_code(hdr, nvme_sc);
2562 if (res)
2563 goto out_dma;
2564 if (nvme_sc) {
2565 res = nvme_sc;
2566 goto out_dma;
2567 }
2568 id_ctrl = mem;
2569 ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
2570 resp_size = ll_length + LUN_DATA_HEADER_SIZE;
2571
2572 if (alloc_len < resp_size) {
2573 res = nvme_trans_completion(hdr,
2574 SAM_STAT_CHECK_CONDITION,
2575 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2576 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2577 goto out_dma;
2578 }
2579
2580 response = kzalloc(resp_size, GFP_KERNEL);
2581 if (response == NULL) {
2582 res = -ENOMEM;
2583 goto out_dma;
2584 }
2585
2586 /* The first LUN ID will always be 0 per the SAM spec */
2587 for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
2588 /*
2589 * Set the LUN Id and then increment to the next LUN
2590 * location in the parameter data.
2591 */
2592 __be64 tmp_id = cpu_to_be64(lun_id);
2593 memcpy(&response[lun_id_offset], &tmp_id, sizeof(u64));
2594 lun_id_offset += LUN_ENTRY_SIZE;
2595 }
2596 tmp_len = cpu_to_be32(ll_length);
2597 memcpy(response, &tmp_len, sizeof(u32));
2598 }
2599
2600 xfer_len = min(alloc_len, resp_size);
2601 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2602
2603 kfree(response);
2604 out_dma:
2605 dma_free_coherent(&dev->pci_dev->dev, sizeof(struct nvme_id_ctrl), mem,
2606 dma_addr);
2607 out:
2608 return res;
2609 }
2610
nvme_trans_request_sense(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2611 static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2612 u8 *cmd)
2613 {
2614 int res = SNTI_TRANSLATION_SUCCESS;
2615 u8 alloc_len, xfer_len, resp_size;
2616 u8 desc_format;
2617 u8 *response;
2618
2619 alloc_len = GET_REQUEST_SENSE_ALLOC_LENGTH(cmd);
2620 desc_format = GET_U8_FROM_CDB(cmd, REQUEST_SENSE_DESC_OFFSET);
2621 desc_format &= REQUEST_SENSE_DESC_MASK;
2622
2623 resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
2624 (FIXED_FMT_SENSE_DATA_SIZE));
2625 response = kzalloc(resp_size, GFP_KERNEL);
2626 if (response == NULL) {
2627 res = -ENOMEM;
2628 goto out;
2629 }
2630
2631 if (desc_format == DESCRIPTOR_FORMAT_SENSE_DATA_TYPE) {
2632 /* Descriptor Format Sense Data */
2633 response[0] = DESC_FORMAT_SENSE_DATA;
2634 response[1] = NO_SENSE;
2635 /* TODO How is LOW POWER CONDITION ON handled? (byte 2) */
2636 response[2] = SCSI_ASC_NO_SENSE;
2637 response[3] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2638 /* SDAT_OVFL = 0 | Additional Sense Length = 0 */
2639 } else {
2640 /* Fixed Format Sense Data */
2641 response[0] = FIXED_SENSE_DATA;
2642 /* Byte 1 = Obsolete */
2643 response[2] = NO_SENSE; /* FM, EOM, ILI, SDAT_OVFL = 0 */
2644 /* Bytes 3-6 - Information - set to zero */
2645 response[7] = FIXED_SENSE_DATA_ADD_LENGTH;
2646 /* Bytes 8-11 - Cmd Specific Information - set to zero */
2647 response[12] = SCSI_ASC_NO_SENSE;
2648 response[13] = SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
2649 /* Byte 14 = Field Replaceable Unit Code = 0 */
2650 /* Bytes 15-17 - SKSV=0; Sense Key Specific = 0 */
2651 }
2652
2653 xfer_len = min(alloc_len, resp_size);
2654 res = nvme_trans_copy_to_user(hdr, response, xfer_len);
2655
2656 kfree(response);
2657 out:
2658 return res;
2659 }
2660
nvme_trans_security_protocol(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2661 static int nvme_trans_security_protocol(struct nvme_ns *ns,
2662 struct sg_io_hdr *hdr,
2663 u8 *cmd)
2664 {
2665 return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2666 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
2667 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2668 }
2669
nvme_trans_start_stop(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2670 static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2671 u8 *cmd)
2672 {
2673 int res = SNTI_TRANSLATION_SUCCESS;
2674 int nvme_sc;
2675 struct nvme_command c;
2676 u8 immed, pcmod, pc, no_flush, start;
2677
2678 immed = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_IMMED_OFFSET);
2679 pcmod = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_MOD_OFFSET);
2680 pc = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_POWER_COND_OFFSET);
2681 no_flush = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_NO_FLUSH_OFFSET);
2682 start = GET_U8_FROM_CDB(cmd, START_STOP_UNIT_CDB_START_OFFSET);
2683
2684 immed &= START_STOP_UNIT_CDB_IMMED_MASK;
2685 pcmod &= START_STOP_UNIT_CDB_POWER_COND_MOD_MASK;
2686 pc = (pc & START_STOP_UNIT_CDB_POWER_COND_MASK) >> NIBBLE_SHIFT;
2687 no_flush &= START_STOP_UNIT_CDB_NO_FLUSH_MASK;
2688 start &= START_STOP_UNIT_CDB_START_MASK;
2689
2690 if (immed != 0) {
2691 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2692 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2693 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2694 } else {
2695 if (no_flush == 0) {
2696 /* Issue NVME FLUSH command prior to START STOP UNIT */
2697 memset(&c, 0, sizeof(c));
2698 c.common.opcode = nvme_cmd_flush;
2699 c.common.nsid = cpu_to_le32(ns->ns_id);
2700
2701 nvme_sc = nvme_submit_io_cmd(ns->dev, ns, &c, NULL);
2702 res = nvme_trans_status_code(hdr, nvme_sc);
2703 if (res)
2704 goto out;
2705 if (nvme_sc) {
2706 res = nvme_sc;
2707 goto out;
2708 }
2709 }
2710 /* Setup the expected power state transition */
2711 res = nvme_trans_power_state(ns, hdr, pc, pcmod, start);
2712 }
2713
2714 out:
2715 return res;
2716 }
2717
nvme_trans_synchronize_cache(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2718 static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
2719 struct sg_io_hdr *hdr, u8 *cmd)
2720 {
2721 int res = SNTI_TRANSLATION_SUCCESS;
2722 int nvme_sc;
2723 struct nvme_command c;
2724
2725 memset(&c, 0, sizeof(c));
2726 c.common.opcode = nvme_cmd_flush;
2727 c.common.nsid = cpu_to_le32(ns->ns_id);
2728
2729 nvme_sc = nvme_submit_io_cmd(ns->dev, ns, &c, NULL);
2730
2731 res = nvme_trans_status_code(hdr, nvme_sc);
2732 if (res)
2733 goto out;
2734 if (nvme_sc)
2735 res = nvme_sc;
2736
2737 out:
2738 return res;
2739 }
2740
nvme_trans_format_unit(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2741 static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2742 u8 *cmd)
2743 {
2744 int res = SNTI_TRANSLATION_SUCCESS;
2745 u8 parm_hdr_len = 0;
2746 u8 nvme_pf_code = 0;
2747 u8 format_prot_info, long_list, format_data;
2748
2749 format_prot_info = GET_U8_FROM_CDB(cmd,
2750 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_OFFSET);
2751 long_list = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_LONG_LIST_OFFSET);
2752 format_data = GET_U8_FROM_CDB(cmd, FORMAT_UNIT_CDB_FORMAT_DATA_OFFSET);
2753
2754 format_prot_info = (format_prot_info &
2755 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_MASK) >>
2756 FORMAT_UNIT_CDB_FORMAT_PROT_INFO_SHIFT;
2757 long_list &= FORMAT_UNIT_CDB_LONG_LIST_MASK;
2758 format_data &= FORMAT_UNIT_CDB_FORMAT_DATA_MASK;
2759
2760 if (format_data != 0) {
2761 if (format_prot_info != 0) {
2762 if (long_list == 0)
2763 parm_hdr_len = FORMAT_UNIT_SHORT_PARM_LIST_LEN;
2764 else
2765 parm_hdr_len = FORMAT_UNIT_LONG_PARM_LIST_LEN;
2766 }
2767 } else if (format_data == 0 && format_prot_info != 0) {
2768 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2769 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2770 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2771 goto out;
2772 }
2773
2774 /* Get parm header from data-in/out buffer */
2775 /*
2776 * According to the translation spec, the only fields in the parameter
2777 * list we are concerned with are in the header. So allocate only that.
2778 */
2779 if (parm_hdr_len > 0) {
2780 res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,
2781 format_prot_info, &nvme_pf_code);
2782 if (res != SNTI_TRANSLATION_SUCCESS)
2783 goto out;
2784 }
2785
2786 /* Attempt to activate any previously downloaded firmware image */
2787 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw, 0, 0, 0);
2788
2789 /* Determine Block size and count and send format command */
2790 res = nvme_trans_fmt_set_blk_size_count(ns, hdr);
2791 if (res != SNTI_TRANSLATION_SUCCESS)
2792 goto out;
2793
2794 res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);
2795
2796 out:
2797 return res;
2798 }
2799
nvme_trans_test_unit_ready(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2800 static int nvme_trans_test_unit_ready(struct nvme_ns *ns,
2801 struct sg_io_hdr *hdr,
2802 u8 *cmd)
2803 {
2804 int res = SNTI_TRANSLATION_SUCCESS;
2805 struct nvme_dev *dev = ns->dev;
2806
2807 if (!(readl(&dev->bar->csts) & NVME_CSTS_RDY))
2808 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2809 NOT_READY, SCSI_ASC_LUN_NOT_READY,
2810 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2811 else
2812 res = nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);
2813
2814 return res;
2815 }
2816
nvme_trans_write_buffer(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2817 static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2818 u8 *cmd)
2819 {
2820 int res = SNTI_TRANSLATION_SUCCESS;
2821 u32 buffer_offset, parm_list_length;
2822 u8 buffer_id, mode;
2823
2824 parm_list_length =
2825 GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_PARM_LIST_LENGTH_OFFSET);
2826 if (parm_list_length % BYTES_TO_DWORDS != 0) {
2827 /* NVMe expects Firmware file to be a whole number of DWORDS */
2828 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2829 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2830 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2831 goto out;
2832 }
2833 buffer_id = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_ID_OFFSET);
2834 if (buffer_id > NVME_MAX_FIRMWARE_SLOT) {
2835 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2836 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2837 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2838 goto out;
2839 }
2840 mode = GET_U8_FROM_CDB(cmd, WRITE_BUFFER_CDB_MODE_OFFSET) &
2841 WRITE_BUFFER_CDB_MODE_MASK;
2842 buffer_offset =
2843 GET_U24_FROM_CDB(cmd, WRITE_BUFFER_CDB_BUFFER_OFFSET_OFFSET);
2844
2845 switch (mode) {
2846 case DOWNLOAD_SAVE_ACTIVATE:
2847 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
2848 parm_list_length, buffer_offset,
2849 buffer_id);
2850 if (res != SNTI_TRANSLATION_SUCCESS)
2851 goto out;
2852 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
2853 parm_list_length, buffer_offset,
2854 buffer_id);
2855 break;
2856 case DOWNLOAD_SAVE_DEFER_ACTIVATE:
2857 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,
2858 parm_list_length, buffer_offset,
2859 buffer_id);
2860 break;
2861 case ACTIVATE_DEFERRED_MICROCODE:
2862 res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,
2863 parm_list_length, buffer_offset,
2864 buffer_id);
2865 break;
2866 default:
2867 res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
2868 ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
2869 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
2870 break;
2871 }
2872
2873 out:
2874 return res;
2875 }
2876
2877 struct scsi_unmap_blk_desc {
2878 __be64 slba;
2879 __be32 nlb;
2880 u32 resv;
2881 };
2882
2883 struct scsi_unmap_parm_list {
2884 __be16 unmap_data_len;
2885 __be16 unmap_blk_desc_data_len;
2886 u32 resv;
2887 struct scsi_unmap_blk_desc desc[0];
2888 };
2889
nvme_trans_unmap(struct nvme_ns * ns,struct sg_io_hdr * hdr,u8 * cmd)2890 static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
2891 u8 *cmd)
2892 {
2893 struct nvme_dev *dev = ns->dev;
2894 struct scsi_unmap_parm_list *plist;
2895 struct nvme_dsm_range *range;
2896 struct nvme_command c;
2897 int i, nvme_sc, res = -ENOMEM;
2898 u16 ndesc, list_len;
2899 dma_addr_t dma_addr;
2900
2901 list_len = GET_U16_FROM_CDB(cmd, UNMAP_CDB_PARAM_LIST_LENGTH_OFFSET);
2902 if (!list_len)
2903 return -EINVAL;
2904
2905 plist = kmalloc(list_len, GFP_KERNEL);
2906 if (!plist)
2907 return -ENOMEM;
2908
2909 res = nvme_trans_copy_from_user(hdr, plist, list_len);
2910 if (res != SNTI_TRANSLATION_SUCCESS)
2911 goto out;
2912
2913 ndesc = be16_to_cpu(plist->unmap_blk_desc_data_len) >> 4;
2914 if (!ndesc || ndesc > 256) {
2915 res = -EINVAL;
2916 goto out;
2917 }
2918
2919 range = dma_alloc_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
2920 &dma_addr, GFP_KERNEL);
2921 if (!range)
2922 goto out;
2923
2924 for (i = 0; i < ndesc; i++) {
2925 range[i].nlb = cpu_to_le32(be32_to_cpu(plist->desc[i].nlb));
2926 range[i].slba = cpu_to_le64(be64_to_cpu(plist->desc[i].slba));
2927 range[i].cattr = 0;
2928 }
2929
2930 memset(&c, 0, sizeof(c));
2931 c.dsm.opcode = nvme_cmd_dsm;
2932 c.dsm.nsid = cpu_to_le32(ns->ns_id);
2933 c.dsm.prp1 = cpu_to_le64(dma_addr);
2934 c.dsm.nr = cpu_to_le32(ndesc - 1);
2935 c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
2936
2937 nvme_sc = nvme_submit_io_cmd(dev, ns, &c, NULL);
2938 res = nvme_trans_status_code(hdr, nvme_sc);
2939
2940 dma_free_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
2941 range, dma_addr);
2942 out:
2943 kfree(plist);
2944 return res;
2945 }
2946
nvme_scsi_translate(struct nvme_ns * ns,struct sg_io_hdr * hdr)2947 static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
2948 {
2949 u8 cmd[BLK_MAX_CDB];
2950 int retcode;
2951 unsigned int opcode;
2952
2953 if (hdr->cmdp == NULL)
2954 return -EMSGSIZE;
2955 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
2956 return -EFAULT;
2957
2958 /*
2959 * Prime the hdr with good status for scsi commands that don't require
2960 * an nvme command for translation.
2961 */
2962 retcode = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);
2963 if (retcode)
2964 return retcode;
2965
2966 opcode = cmd[0];
2967
2968 switch (opcode) {
2969 case READ_6:
2970 case READ_10:
2971 case READ_12:
2972 case READ_16:
2973 retcode = nvme_trans_io(ns, hdr, 0, cmd);
2974 break;
2975 case WRITE_6:
2976 case WRITE_10:
2977 case WRITE_12:
2978 case WRITE_16:
2979 retcode = nvme_trans_io(ns, hdr, 1, cmd);
2980 break;
2981 case INQUIRY:
2982 retcode = nvme_trans_inquiry(ns, hdr, cmd);
2983 break;
2984 case LOG_SENSE:
2985 retcode = nvme_trans_log_sense(ns, hdr, cmd);
2986 break;
2987 case MODE_SELECT:
2988 case MODE_SELECT_10:
2989 retcode = nvme_trans_mode_select(ns, hdr, cmd);
2990 break;
2991 case MODE_SENSE:
2992 case MODE_SENSE_10:
2993 retcode = nvme_trans_mode_sense(ns, hdr, cmd);
2994 break;
2995 case READ_CAPACITY:
2996 retcode = nvme_trans_read_capacity(ns, hdr, cmd);
2997 break;
2998 case SERVICE_ACTION_IN_16:
2999 if (IS_READ_CAP_16(cmd))
3000 retcode = nvme_trans_read_capacity(ns, hdr, cmd);
3001 else
3002 goto out;
3003 break;
3004 case REPORT_LUNS:
3005 retcode = nvme_trans_report_luns(ns, hdr, cmd);
3006 break;
3007 case REQUEST_SENSE:
3008 retcode = nvme_trans_request_sense(ns, hdr, cmd);
3009 break;
3010 case SECURITY_PROTOCOL_IN:
3011 case SECURITY_PROTOCOL_OUT:
3012 retcode = nvme_trans_security_protocol(ns, hdr, cmd);
3013 break;
3014 case START_STOP:
3015 retcode = nvme_trans_start_stop(ns, hdr, cmd);
3016 break;
3017 case SYNCHRONIZE_CACHE:
3018 retcode = nvme_trans_synchronize_cache(ns, hdr, cmd);
3019 break;
3020 case FORMAT_UNIT:
3021 retcode = nvme_trans_format_unit(ns, hdr, cmd);
3022 break;
3023 case TEST_UNIT_READY:
3024 retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);
3025 break;
3026 case WRITE_BUFFER:
3027 retcode = nvme_trans_write_buffer(ns, hdr, cmd);
3028 break;
3029 case UNMAP:
3030 retcode = nvme_trans_unmap(ns, hdr, cmd);
3031 break;
3032 default:
3033 out:
3034 retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,
3035 ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_COMMAND,
3036 SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
3037 break;
3038 }
3039 return retcode;
3040 }
3041
nvme_sg_io(struct nvme_ns * ns,struct sg_io_hdr __user * u_hdr)3042 int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr)
3043 {
3044 struct sg_io_hdr hdr;
3045 int retcode;
3046
3047 if (!capable(CAP_SYS_ADMIN))
3048 return -EACCES;
3049 if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))
3050 return -EFAULT;
3051 if (hdr.interface_id != 'S')
3052 return -EINVAL;
3053 if (hdr.cmd_len > BLK_MAX_CDB)
3054 return -EINVAL;
3055
3056 retcode = nvme_scsi_translate(ns, &hdr);
3057 if (retcode < 0)
3058 return retcode;
3059 if (retcode > 0)
3060 retcode = SNTI_TRANSLATION_SUCCESS;
3061 if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)
3062 return -EFAULT;
3063
3064 return retcode;
3065 }
3066
nvme_sg_get_version_num(int __user * ip)3067 int nvme_sg_get_version_num(int __user *ip)
3068 {
3069 return put_user(sg_version_num, ip);
3070 }
3071