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89d94756 HR |
1 | /* |
2 | * SCSI Zoned Block commands | |
3 | * | |
4 | * Copyright (C) 2014-2015 SUSE Linux GmbH | |
5 | * Written by: Hannes Reinecke <hare@suse.de> | |
6 | * Modified by: Damien Le Moal <damien.lemoal@hgst.com> | |
7 | * Modified by: Shaun Tancheff <shaun.tancheff@seagate.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License version | |
11 | * 2 as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; see the file COPYING. If not, write to | |
20 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
21 | * USA. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/blkdev.h> | |
26 | ||
27 | #include <asm/unaligned.h> | |
28 | ||
29 | #include <scsi/scsi.h> | |
30 | #include <scsi/scsi_cmnd.h> | |
89d94756 HR |
31 | |
32 | #include "sd.h" | |
89d94756 HR |
33 | |
34 | /** | |
35 | * Convert a zone descriptor to a zone struct. | |
36 | */ | |
37 | static void sd_zbc_parse_report(struct scsi_disk *sdkp, | |
38 | u8 *buf, | |
39 | struct blk_zone *zone) | |
40 | { | |
41 | struct scsi_device *sdp = sdkp->device; | |
42 | ||
43 | memset(zone, 0, sizeof(struct blk_zone)); | |
44 | ||
45 | zone->type = buf[0] & 0x0f; | |
46 | zone->cond = (buf[1] >> 4) & 0xf; | |
47 | if (buf[1] & 0x01) | |
48 | zone->reset = 1; | |
49 | if (buf[1] & 0x02) | |
50 | zone->non_seq = 1; | |
51 | ||
52 | zone->len = logical_to_sectors(sdp, get_unaligned_be64(&buf[8])); | |
53 | zone->start = logical_to_sectors(sdp, get_unaligned_be64(&buf[16])); | |
54 | zone->wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24])); | |
55 | if (zone->type != ZBC_ZONE_TYPE_CONV && | |
56 | zone->cond == ZBC_ZONE_COND_FULL) | |
57 | zone->wp = zone->start + zone->len; | |
58 | } | |
59 | ||
60 | /** | |
61 | * Issue a REPORT ZONES scsi command. | |
62 | */ | |
63 | static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf, | |
64 | unsigned int buflen, sector_t lba) | |
65 | { | |
66 | struct scsi_device *sdp = sdkp->device; | |
67 | const int timeout = sdp->request_queue->rq_timeout; | |
68 | struct scsi_sense_hdr sshdr; | |
69 | unsigned char cmd[16]; | |
70 | unsigned int rep_len; | |
71 | int result; | |
72 | ||
73 | memset(cmd, 0, 16); | |
74 | cmd[0] = ZBC_IN; | |
75 | cmd[1] = ZI_REPORT_ZONES; | |
76 | put_unaligned_be64(lba, &cmd[2]); | |
77 | put_unaligned_be32(buflen, &cmd[10]); | |
78 | memset(buf, 0, buflen); | |
79 | ||
80 | result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
81 | buf, buflen, &sshdr, | |
82 | timeout, SD_MAX_RETRIES, NULL); | |
83 | if (result) { | |
84 | sd_printk(KERN_ERR, sdkp, | |
85 | "REPORT ZONES lba %llu failed with %d/%d\n", | |
86 | (unsigned long long)lba, | |
87 | host_byte(result), driver_byte(result)); | |
88 | return -EIO; | |
89 | } | |
90 | ||
91 | rep_len = get_unaligned_be32(&buf[0]); | |
92 | if (rep_len < 64) { | |
93 | sd_printk(KERN_ERR, sdkp, | |
94 | "REPORT ZONES report invalid length %u\n", | |
95 | rep_len); | |
96 | return -EIO; | |
97 | } | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd) | |
103 | { | |
104 | struct request *rq = cmd->request; | |
105 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
106 | sector_t lba, sector = blk_rq_pos(rq); | |
107 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
108 | int ret; | |
109 | ||
110 | WARN_ON(nr_bytes == 0); | |
111 | ||
112 | if (!sd_is_zoned(sdkp)) | |
113 | /* Not a zoned device */ | |
114 | return BLKPREP_KILL; | |
115 | ||
116 | ret = scsi_init_io(cmd); | |
117 | if (ret != BLKPREP_OK) | |
118 | return ret; | |
119 | ||
120 | cmd->cmd_len = 16; | |
121 | memset(cmd->cmnd, 0, cmd->cmd_len); | |
122 | cmd->cmnd[0] = ZBC_IN; | |
123 | cmd->cmnd[1] = ZI_REPORT_ZONES; | |
124 | lba = sectors_to_logical(sdkp->device, sector); | |
125 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
126 | put_unaligned_be32(nr_bytes, &cmd->cmnd[10]); | |
127 | /* Do partial report for speeding things up */ | |
128 | cmd->cmnd[14] = ZBC_REPORT_ZONE_PARTIAL; | |
129 | ||
130 | cmd->sc_data_direction = DMA_FROM_DEVICE; | |
131 | cmd->sdb.length = nr_bytes; | |
132 | cmd->transfersize = sdkp->device->sector_size; | |
133 | cmd->allowed = 0; | |
134 | ||
135 | /* | |
136 | * Report may return less bytes than requested. Make sure | |
137 | * to report completion on the entire initial request. | |
138 | */ | |
139 | rq->__data_len = nr_bytes; | |
140 | ||
141 | return BLKPREP_OK; | |
142 | } | |
143 | ||
144 | static void sd_zbc_report_zones_complete(struct scsi_cmnd *scmd, | |
145 | unsigned int good_bytes) | |
146 | { | |
147 | struct request *rq = scmd->request; | |
148 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
149 | struct sg_mapping_iter miter; | |
150 | struct blk_zone_report_hdr hdr; | |
151 | struct blk_zone zone; | |
152 | unsigned int offset, bytes = 0; | |
153 | unsigned long flags; | |
154 | u8 *buf; | |
155 | ||
156 | if (good_bytes < 64) | |
157 | return; | |
158 | ||
159 | memset(&hdr, 0, sizeof(struct blk_zone_report_hdr)); | |
160 | ||
161 | sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), | |
162 | SG_MITER_TO_SG | SG_MITER_ATOMIC); | |
163 | ||
164 | local_irq_save(flags); | |
165 | while (sg_miter_next(&miter) && bytes < good_bytes) { | |
166 | ||
167 | buf = miter.addr; | |
168 | offset = 0; | |
169 | ||
170 | if (bytes == 0) { | |
171 | /* Set the report header */ | |
172 | hdr.nr_zones = min_t(unsigned int, | |
173 | (good_bytes - 64) / 64, | |
174 | get_unaligned_be32(&buf[0]) / 64); | |
175 | memcpy(buf, &hdr, sizeof(struct blk_zone_report_hdr)); | |
176 | offset += 64; | |
177 | bytes += 64; | |
178 | } | |
179 | ||
180 | /* Parse zone descriptors */ | |
181 | while (offset < miter.length && hdr.nr_zones) { | |
182 | WARN_ON(offset > miter.length); | |
183 | buf = miter.addr + offset; | |
184 | sd_zbc_parse_report(sdkp, buf, &zone); | |
185 | memcpy(buf, &zone, sizeof(struct blk_zone)); | |
186 | offset += 64; | |
187 | bytes += 64; | |
188 | hdr.nr_zones--; | |
189 | } | |
190 | ||
191 | if (!hdr.nr_zones) | |
192 | break; | |
193 | ||
194 | } | |
195 | sg_miter_stop(&miter); | |
196 | local_irq_restore(flags); | |
197 | } | |
198 | ||
199 | static inline sector_t sd_zbc_zone_sectors(struct scsi_disk *sdkp) | |
200 | { | |
201 | return logical_to_sectors(sdkp->device, sdkp->zone_blocks); | |
202 | } | |
203 | ||
204 | static inline unsigned int sd_zbc_zone_no(struct scsi_disk *sdkp, | |
205 | sector_t sector) | |
206 | { | |
207 | return sectors_to_logical(sdkp->device, sector) >> sdkp->zone_shift; | |
208 | } | |
209 | ||
210 | int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd) | |
211 | { | |
212 | struct request *rq = cmd->request; | |
213 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
214 | sector_t sector = blk_rq_pos(rq); | |
215 | sector_t block = sectors_to_logical(sdkp->device, sector); | |
89d94756 HR |
216 | |
217 | if (!sd_is_zoned(sdkp)) | |
218 | /* Not a zoned device */ | |
219 | return BLKPREP_KILL; | |
220 | ||
221 | if (sdkp->device->changed) | |
222 | return BLKPREP_KILL; | |
223 | ||
224 | if (sector & (sd_zbc_zone_sectors(sdkp) - 1)) | |
225 | /* Unaligned request */ | |
226 | return BLKPREP_KILL; | |
227 | ||
89d94756 HR |
228 | cmd->cmd_len = 16; |
229 | memset(cmd->cmnd, 0, cmd->cmd_len); | |
230 | cmd->cmnd[0] = ZBC_OUT; | |
231 | cmd->cmnd[1] = ZO_RESET_WRITE_POINTER; | |
232 | put_unaligned_be64(block, &cmd->cmnd[2]); | |
233 | ||
234 | rq->timeout = SD_TIMEOUT; | |
235 | cmd->sc_data_direction = DMA_NONE; | |
236 | cmd->transfersize = 0; | |
237 | cmd->allowed = 0; | |
238 | ||
239 | return BLKPREP_OK; | |
240 | } | |
241 | ||
a90dfdc2 | 242 | int sd_zbc_write_lock_zone(struct scsi_cmnd *cmd) |
89d94756 HR |
243 | { |
244 | struct request *rq = cmd->request; | |
245 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
246 | sector_t sector = blk_rq_pos(rq); | |
247 | sector_t zone_sectors = sd_zbc_zone_sectors(sdkp); | |
248 | unsigned int zno = sd_zbc_zone_no(sdkp, sector); | |
249 | ||
250 | /* | |
251 | * Note: Checks of the alignment of the write command on | |
252 | * logical blocks is done in sd.c | |
253 | */ | |
254 | ||
255 | /* Do not allow zone boundaries crossing on host-managed drives */ | |
256 | if (blk_queue_zoned_model(sdkp->disk->queue) == BLK_ZONED_HM && | |
257 | (sector & (zone_sectors - 1)) + blk_rq_sectors(rq) > zone_sectors) | |
258 | return BLKPREP_KILL; | |
259 | ||
260 | /* | |
261 | * Do not issue more than one write at a time per | |
262 | * zone. This solves write ordering problems due to | |
263 | * the unlocking of the request queue in the dispatch | |
264 | * path in the non scsi-mq case. For scsi-mq, this | |
265 | * also avoids potential write reordering when multiple | |
266 | * threads running on different CPUs write to the same | |
267 | * zone (with a synchronized sequential pattern). | |
268 | */ | |
269 | if (sdkp->zones_wlock && | |
270 | test_and_set_bit(zno, sdkp->zones_wlock)) | |
271 | return BLKPREP_DEFER; | |
272 | ||
70e42fd0 DLM |
273 | WARN_ON_ONCE(cmd->flags & SCMD_ZONE_WRITE_LOCK); |
274 | cmd->flags |= SCMD_ZONE_WRITE_LOCK; | |
275 | ||
89d94756 HR |
276 | return BLKPREP_OK; |
277 | } | |
278 | ||
a90dfdc2 | 279 | void sd_zbc_write_unlock_zone(struct scsi_cmnd *cmd) |
89d94756 | 280 | { |
a90dfdc2 | 281 | struct request *rq = cmd->request; |
89d94756 HR |
282 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
283 | ||
70e42fd0 | 284 | if (sdkp->zones_wlock && cmd->flags & SCMD_ZONE_WRITE_LOCK) { |
89d94756 HR |
285 | unsigned int zno = sd_zbc_zone_no(sdkp, blk_rq_pos(rq)); |
286 | WARN_ON_ONCE(!test_bit(zno, sdkp->zones_wlock)); | |
70e42fd0 | 287 | cmd->flags &= ~SCMD_ZONE_WRITE_LOCK; |
89d94756 HR |
288 | clear_bit_unlock(zno, sdkp->zones_wlock); |
289 | smp_mb__after_atomic(); | |
290 | } | |
291 | } | |
292 | ||
89d94756 HR |
293 | void sd_zbc_complete(struct scsi_cmnd *cmd, |
294 | unsigned int good_bytes, | |
295 | struct scsi_sense_hdr *sshdr) | |
296 | { | |
297 | int result = cmd->result; | |
298 | struct request *rq = cmd->request; | |
299 | ||
300 | switch (req_op(rq)) { | |
868ed5a5 DLM |
301 | case REQ_OP_ZONE_RESET: |
302 | ||
303 | if (result && | |
304 | sshdr->sense_key == ILLEGAL_REQUEST && | |
305 | sshdr->asc == 0x24) | |
306 | /* | |
307 | * INVALID FIELD IN CDB error: reset of a conventional | |
308 | * zone was attempted. Nothing to worry about, so be | |
309 | * quiet about the error. | |
310 | */ | |
311 | rq->rq_flags |= RQF_QUIET; | |
312 | break; | |
313 | ||
89d94756 | 314 | case REQ_OP_WRITE: |
02d26103 | 315 | case REQ_OP_WRITE_ZEROES: |
89d94756 | 316 | case REQ_OP_WRITE_SAME: |
89d94756 | 317 | |
868ed5a5 DLM |
318 | if (result && |
319 | sshdr->sense_key == ILLEGAL_REQUEST && | |
320 | sshdr->asc == 0x21) | |
89d94756 HR |
321 | /* |
322 | * INVALID ADDRESS FOR WRITE error: It is unlikely that | |
323 | * retrying write requests failed with any kind of | |
324 | * alignement error will result in success. So don't. | |
325 | */ | |
326 | cmd->allowed = 0; | |
89d94756 HR |
327 | break; |
328 | ||
329 | case REQ_OP_ZONE_REPORT: | |
330 | ||
331 | if (!result) | |
332 | sd_zbc_report_zones_complete(cmd, good_bytes); | |
333 | break; | |
334 | ||
335 | } | |
336 | } | |
337 | ||
338 | /** | |
339 | * Read zoned block device characteristics (VPD page B6). | |
340 | */ | |
341 | static int sd_zbc_read_zoned_characteristics(struct scsi_disk *sdkp, | |
342 | unsigned char *buf) | |
343 | { | |
344 | ||
345 | if (scsi_get_vpd_page(sdkp->device, 0xb6, buf, 64)) { | |
346 | sd_printk(KERN_NOTICE, sdkp, | |
347 | "Unconstrained-read check failed\n"); | |
348 | return -ENODEV; | |
349 | } | |
350 | ||
351 | if (sdkp->device->type != TYPE_ZBC) { | |
352 | /* Host-aware */ | |
353 | sdkp->urswrz = 1; | |
354 | sdkp->zones_optimal_open = get_unaligned_be64(&buf[8]); | |
355 | sdkp->zones_optimal_nonseq = get_unaligned_be64(&buf[12]); | |
356 | sdkp->zones_max_open = 0; | |
357 | } else { | |
358 | /* Host-managed */ | |
359 | sdkp->urswrz = buf[4] & 1; | |
360 | sdkp->zones_optimal_open = 0; | |
361 | sdkp->zones_optimal_nonseq = 0; | |
362 | sdkp->zones_max_open = get_unaligned_be64(&buf[16]); | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | /** | |
369 | * Check reported capacity. | |
370 | */ | |
371 | static int sd_zbc_check_capacity(struct scsi_disk *sdkp, | |
372 | unsigned char *buf) | |
373 | { | |
374 | sector_t lba; | |
375 | int ret; | |
376 | ||
377 | if (sdkp->rc_basis != 0) | |
378 | return 0; | |
379 | ||
380 | /* Do a report zone to get the maximum LBA to check capacity */ | |
381 | ret = sd_zbc_report_zones(sdkp, buf, SD_BUF_SIZE, 0); | |
382 | if (ret) | |
383 | return ret; | |
384 | ||
385 | /* The max_lba field is the capacity of this device */ | |
386 | lba = get_unaligned_be64(&buf[8]); | |
387 | if (lba + 1 == sdkp->capacity) | |
388 | return 0; | |
389 | ||
390 | if (sdkp->first_scan) | |
391 | sd_printk(KERN_WARNING, sdkp, | |
392 | "Changing capacity from %llu to max LBA+1 %llu\n", | |
393 | (unsigned long long)sdkp->capacity, | |
394 | (unsigned long long)lba + 1); | |
395 | sdkp->capacity = lba + 1; | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | #define SD_ZBC_BUF_SIZE 131072 | |
401 | ||
402 | static int sd_zbc_check_zone_size(struct scsi_disk *sdkp) | |
403 | { | |
404 | u64 zone_blocks; | |
405 | sector_t block = 0; | |
406 | unsigned char *buf; | |
407 | unsigned char *rec; | |
408 | unsigned int buf_len; | |
409 | unsigned int list_length; | |
410 | int ret; | |
411 | u8 same; | |
412 | ||
413 | sdkp->zone_blocks = 0; | |
414 | ||
415 | /* Get a buffer */ | |
416 | buf = kmalloc(SD_ZBC_BUF_SIZE, GFP_KERNEL); | |
417 | if (!buf) | |
418 | return -ENOMEM; | |
419 | ||
420 | /* Do a report zone to get the same field */ | |
421 | ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0); | |
5f2808ff AB |
422 | if (ret) { |
423 | zone_blocks = 0; | |
89d94756 | 424 | goto out; |
5f2808ff | 425 | } |
89d94756 HR |
426 | |
427 | same = buf[4] & 0x0f; | |
428 | if (same > 0) { | |
429 | rec = &buf[64]; | |
430 | zone_blocks = get_unaligned_be64(&rec[8]); | |
431 | goto out; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Check the size of all zones: all zones must be of | |
436 | * equal size, except the last zone which can be smaller | |
437 | * than other zones. | |
438 | */ | |
439 | do { | |
440 | ||
441 | /* Parse REPORT ZONES header */ | |
442 | list_length = get_unaligned_be32(&buf[0]) + 64; | |
443 | rec = buf + 64; | |
444 | if (list_length < SD_ZBC_BUF_SIZE) | |
445 | buf_len = list_length; | |
446 | else | |
447 | buf_len = SD_ZBC_BUF_SIZE; | |
448 | ||
449 | /* Parse zone descriptors */ | |
450 | while (rec < buf + buf_len) { | |
451 | zone_blocks = get_unaligned_be64(&rec[8]); | |
452 | if (sdkp->zone_blocks == 0) { | |
453 | sdkp->zone_blocks = zone_blocks; | |
454 | } else if (zone_blocks != sdkp->zone_blocks && | |
455 | (block + zone_blocks < sdkp->capacity | |
456 | || zone_blocks > sdkp->zone_blocks)) { | |
457 | zone_blocks = 0; | |
458 | goto out; | |
459 | } | |
460 | block += zone_blocks; | |
461 | rec += 64; | |
462 | } | |
463 | ||
464 | if (block < sdkp->capacity) { | |
465 | ret = sd_zbc_report_zones(sdkp, buf, | |
466 | SD_ZBC_BUF_SIZE, block); | |
467 | if (ret) | |
468 | return ret; | |
469 | } | |
470 | ||
471 | } while (block < sdkp->capacity); | |
472 | ||
473 | zone_blocks = sdkp->zone_blocks; | |
474 | ||
475 | out: | |
476 | kfree(buf); | |
477 | ||
478 | if (!zone_blocks) { | |
479 | if (sdkp->first_scan) | |
480 | sd_printk(KERN_NOTICE, sdkp, | |
481 | "Devices with non constant zone " | |
482 | "size are not supported\n"); | |
483 | return -ENODEV; | |
484 | } | |
485 | ||
486 | if (!is_power_of_2(zone_blocks)) { | |
487 | if (sdkp->first_scan) | |
488 | sd_printk(KERN_NOTICE, sdkp, | |
489 | "Devices with non power of 2 zone " | |
490 | "size are not supported\n"); | |
491 | return -ENODEV; | |
492 | } | |
493 | ||
494 | if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) { | |
495 | if (sdkp->first_scan) | |
496 | sd_printk(KERN_NOTICE, sdkp, | |
497 | "Zone size too large\n"); | |
498 | return -ENODEV; | |
499 | } | |
500 | ||
501 | sdkp->zone_blocks = zone_blocks; | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int sd_zbc_setup(struct scsi_disk *sdkp) | |
507 | { | |
508 | ||
509 | /* chunk_sectors indicates the zone size */ | |
510 | blk_queue_chunk_sectors(sdkp->disk->queue, | |
511 | logical_to_sectors(sdkp->device, sdkp->zone_blocks)); | |
512 | sdkp->zone_shift = ilog2(sdkp->zone_blocks); | |
513 | sdkp->nr_zones = sdkp->capacity >> sdkp->zone_shift; | |
514 | if (sdkp->capacity & (sdkp->zone_blocks - 1)) | |
515 | sdkp->nr_zones++; | |
516 | ||
517 | if (!sdkp->zones_wlock) { | |
518 | sdkp->zones_wlock = kcalloc(BITS_TO_LONGS(sdkp->nr_zones), | |
519 | sizeof(unsigned long), | |
520 | GFP_KERNEL); | |
521 | if (!sdkp->zones_wlock) | |
522 | return -ENOMEM; | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | int sd_zbc_read_zones(struct scsi_disk *sdkp, | |
529 | unsigned char *buf) | |
530 | { | |
f7053240 | 531 | int ret; |
89d94756 HR |
532 | |
533 | if (!sd_is_zoned(sdkp)) | |
534 | /* | |
535 | * Device managed or normal SCSI disk, | |
536 | * no special handling required | |
537 | */ | |
538 | return 0; | |
539 | ||
540 | ||
541 | /* Get zoned block device characteristics */ | |
542 | ret = sd_zbc_read_zoned_characteristics(sdkp, buf); | |
543 | if (ret) | |
544 | goto err; | |
545 | ||
546 | /* | |
547 | * Check for unconstrained reads: host-managed devices with | |
548 | * constrained reads (drives failing read after write pointer) | |
549 | * are not supported. | |
550 | */ | |
551 | if (!sdkp->urswrz) { | |
552 | if (sdkp->first_scan) | |
553 | sd_printk(KERN_NOTICE, sdkp, | |
554 | "constrained reads devices are not supported\n"); | |
555 | ret = -ENODEV; | |
556 | goto err; | |
557 | } | |
558 | ||
559 | /* Check capacity */ | |
560 | ret = sd_zbc_check_capacity(sdkp, buf); | |
561 | if (ret) | |
562 | goto err; | |
89d94756 HR |
563 | |
564 | /* | |
565 | * Check zone size: only devices with a constant zone size (except | |
566 | * an eventual last runt zone) that is a power of 2 are supported. | |
567 | */ | |
568 | ret = sd_zbc_check_zone_size(sdkp); | |
569 | if (ret) | |
570 | goto err; | |
571 | ||
572 | /* The drive satisfies the kernel restrictions: set it up */ | |
573 | ret = sd_zbc_setup(sdkp); | |
574 | if (ret) | |
575 | goto err; | |
576 | ||
c6463c65 DLM |
577 | /* READ16/WRITE16 is mandatory for ZBC disks */ |
578 | sdkp->device->use_16_for_rw = 1; | |
579 | sdkp->device->use_10_for_rw = 0; | |
580 | ||
89d94756 HR |
581 | return 0; |
582 | ||
583 | err: | |
584 | sdkp->capacity = 0; | |
585 | ||
586 | return ret; | |
587 | } | |
588 | ||
589 | void sd_zbc_remove(struct scsi_disk *sdkp) | |
590 | { | |
591 | kfree(sdkp->zones_wlock); | |
592 | sdkp->zones_wlock = NULL; | |
593 | } | |
594 | ||
595 | void sd_zbc_print_zones(struct scsi_disk *sdkp) | |
596 | { | |
597 | if (!sd_is_zoned(sdkp) || !sdkp->capacity) | |
598 | return; | |
599 | ||
600 | if (sdkp->capacity & (sdkp->zone_blocks - 1)) | |
601 | sd_printk(KERN_NOTICE, sdkp, | |
602 | "%u zones of %u logical blocks + 1 runt zone\n", | |
603 | sdkp->nr_zones - 1, | |
604 | sdkp->zone_blocks); | |
605 | else | |
606 | sd_printk(KERN_NOTICE, sdkp, | |
607 | "%u zones of %u logical blocks\n", | |
608 | sdkp->nr_zones, | |
609 | sdkp->zone_blocks); | |
610 | } |