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36#include <linux/module.h>
37#include <linux/fs.h>
38#include <linux/kernel.h>
39#include <linux/mm.h>
40#include <linux/bio.h>
41#include <linux/genhd.h>
42#include <linux/hdreg.h>
43#include <linux/errno.h>
44#include <linux/idr.h>
45#include <linux/interrupt.h>
46#include <linux/init.h>
47#include <linux/blkdev.h>
48#include <linux/blkpg.h>
49#include <linux/blk-pm.h>
50#include <linux/delay.h>
51#include <linux/mutex.h>
52#include <linux/string_helpers.h>
53#include <linux/async.h>
54#include <linux/slab.h>
55#include <linux/sed-opal.h>
56#include <linux/pm_runtime.h>
57#include <linux/pr.h>
58#include <linux/t10-pi.h>
59#include <linux/uaccess.h>
60#include <asm/unaligned.h>
61
62#include <scsi/scsi.h>
63#include <scsi/scsi_cmnd.h>
64#include <scsi/scsi_dbg.h>
65#include <scsi/scsi_device.h>
66#include <scsi/scsi_driver.h>
67#include <scsi/scsi_eh.h>
68#include <scsi/scsi_host.h>
69#include <scsi/scsi_ioctl.h>
70#include <scsi/scsicam.h>
71
72#include "sd.h"
73#include "scsi_priv.h"
74#include "scsi_logging.h"
75
76MODULE_AUTHOR("Eric Youngdale");
77MODULE_DESCRIPTION("SCSI disk (sd) driver");
78MODULE_LICENSE("GPL");
79
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
89MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
90MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
91MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
92MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
93MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
94MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
95MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
96MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
97MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
98MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
99MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
100
101#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
102#define SD_MINORS 16
103#else
104#define SD_MINORS 0
105#endif
106
107static void sd_config_discard(struct scsi_disk *, unsigned int);
108static void sd_config_write_same(struct scsi_disk *);
109static int sd_revalidate_disk(struct gendisk *);
110static void sd_unlock_native_capacity(struct gendisk *disk);
111static int sd_probe(struct device *);
112static int sd_remove(struct device *);
113static void sd_shutdown(struct device *);
114static int sd_suspend_system(struct device *);
115static int sd_suspend_runtime(struct device *);
116static int sd_resume(struct device *);
117static void sd_rescan(struct device *);
118static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
119static void sd_uninit_command(struct scsi_cmnd *SCpnt);
120static int sd_done(struct scsi_cmnd *);
121static void sd_eh_reset(struct scsi_cmnd *);
122static int sd_eh_action(struct scsi_cmnd *, int);
123static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
124static void scsi_disk_release(struct device *cdev);
125static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
126static void sd_print_result(const struct scsi_disk *, const char *, int);
127
128static DEFINE_IDA(sd_index_ida);
129
130
131
132
133static DEFINE_MUTEX(sd_ref_mutex);
134
135static struct kmem_cache *sd_cdb_cache;
136static mempool_t *sd_cdb_pool;
137static mempool_t *sd_page_pool;
138
139static const char *sd_cache_types[] = {
140 "write through", "none", "write back",
141 "write back, no read (daft)"
142};
143
144static void sd_set_flush_flag(struct scsi_disk *sdkp)
145{
146 bool wc = false, fua = false;
147
148 if (sdkp->WCE) {
149 wc = true;
150 if (sdkp->DPOFUA)
151 fua = true;
152 }
153
154 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
155}
156
157static ssize_t
158cache_type_store(struct device *dev, struct device_attribute *attr,
159 const char *buf, size_t count)
160{
161 int ct, rcd, wce, sp;
162 struct scsi_disk *sdkp = to_scsi_disk(dev);
163 struct scsi_device *sdp = sdkp->device;
164 char buffer[64];
165 char *buffer_data;
166 struct scsi_mode_data data;
167 struct scsi_sense_hdr sshdr;
168 static const char temp[] = "temporary ";
169 int len;
170
171 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
172
173
174
175 return -EINVAL;
176
177 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
178 buf += sizeof(temp) - 1;
179 sdkp->cache_override = 1;
180 } else {
181 sdkp->cache_override = 0;
182 }
183
184 ct = sysfs_match_string(sd_cache_types, buf);
185 if (ct < 0)
186 return -EINVAL;
187
188 rcd = ct & 0x01 ? 1 : 0;
189 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
190
191 if (sdkp->cache_override) {
192 sdkp->WCE = wce;
193 sdkp->RCD = rcd;
194 sd_set_flush_flag(sdkp);
195 return count;
196 }
197
198 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
199 SD_MAX_RETRIES, &data, NULL))
200 return -EINVAL;
201 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
202 data.block_descriptor_length);
203 buffer_data = buffer + data.header_length +
204 data.block_descriptor_length;
205 buffer_data[2] &= ~0x05;
206 buffer_data[2] |= wce << 2 | rcd;
207 sp = buffer_data[0] & 0x80 ? 1 : 0;
208 buffer_data[0] &= ~0x80;
209
210
211
212
213
214 data.device_specific = 0;
215
216 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
217 SD_MAX_RETRIES, &data, &sshdr)) {
218 if (scsi_sense_valid(&sshdr))
219 sd_print_sense_hdr(sdkp, &sshdr);
220 return -EINVAL;
221 }
222 revalidate_disk(sdkp->disk);
223 return count;
224}
225
226static ssize_t
227manage_start_stop_show(struct device *dev, struct device_attribute *attr,
228 char *buf)
229{
230 struct scsi_disk *sdkp = to_scsi_disk(dev);
231 struct scsi_device *sdp = sdkp->device;
232
233 return sprintf(buf, "%u\n", sdp->manage_start_stop);
234}
235
236static ssize_t
237manage_start_stop_store(struct device *dev, struct device_attribute *attr,
238 const char *buf, size_t count)
239{
240 struct scsi_disk *sdkp = to_scsi_disk(dev);
241 struct scsi_device *sdp = sdkp->device;
242 bool v;
243
244 if (!capable(CAP_SYS_ADMIN))
245 return -EACCES;
246
247 if (kstrtobool(buf, &v))
248 return -EINVAL;
249
250 sdp->manage_start_stop = v;
251
252 return count;
253}
254static DEVICE_ATTR_RW(manage_start_stop);
255
256static ssize_t
257allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
258{
259 struct scsi_disk *sdkp = to_scsi_disk(dev);
260
261 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
262}
263
264static ssize_t
265allow_restart_store(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267{
268 bool v;
269 struct scsi_disk *sdkp = to_scsi_disk(dev);
270 struct scsi_device *sdp = sdkp->device;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EACCES;
274
275 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
276 return -EINVAL;
277
278 if (kstrtobool(buf, &v))
279 return -EINVAL;
280
281 sdp->allow_restart = v;
282
283 return count;
284}
285static DEVICE_ATTR_RW(allow_restart);
286
287static ssize_t
288cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
289{
290 struct scsi_disk *sdkp = to_scsi_disk(dev);
291 int ct = sdkp->RCD + 2*sdkp->WCE;
292
293 return sprintf(buf, "%s\n", sd_cache_types[ct]);
294}
295static DEVICE_ATTR_RW(cache_type);
296
297static ssize_t
298FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
299{
300 struct scsi_disk *sdkp = to_scsi_disk(dev);
301
302 return sprintf(buf, "%u\n", sdkp->DPOFUA);
303}
304static DEVICE_ATTR_RO(FUA);
305
306static ssize_t
307protection_type_show(struct device *dev, struct device_attribute *attr,
308 char *buf)
309{
310 struct scsi_disk *sdkp = to_scsi_disk(dev);
311
312 return sprintf(buf, "%u\n", sdkp->protection_type);
313}
314
315static ssize_t
316protection_type_store(struct device *dev, struct device_attribute *attr,
317 const char *buf, size_t count)
318{
319 struct scsi_disk *sdkp = to_scsi_disk(dev);
320 unsigned int val;
321 int err;
322
323 if (!capable(CAP_SYS_ADMIN))
324 return -EACCES;
325
326 err = kstrtouint(buf, 10, &val);
327
328 if (err)
329 return err;
330
331 if (val <= T10_PI_TYPE3_PROTECTION)
332 sdkp->protection_type = val;
333
334 return count;
335}
336static DEVICE_ATTR_RW(protection_type);
337
338static ssize_t
339protection_mode_show(struct device *dev, struct device_attribute *attr,
340 char *buf)
341{
342 struct scsi_disk *sdkp = to_scsi_disk(dev);
343 struct scsi_device *sdp = sdkp->device;
344 unsigned int dif, dix;
345
346 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
347 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
348
349 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
350 dif = 0;
351 dix = 1;
352 }
353
354 if (!dif && !dix)
355 return sprintf(buf, "none\n");
356
357 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
358}
359static DEVICE_ATTR_RO(protection_mode);
360
361static ssize_t
362app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
363{
364 struct scsi_disk *sdkp = to_scsi_disk(dev);
365
366 return sprintf(buf, "%u\n", sdkp->ATO);
367}
368static DEVICE_ATTR_RO(app_tag_own);
369
370static ssize_t
371thin_provisioning_show(struct device *dev, struct device_attribute *attr,
372 char *buf)
373{
374 struct scsi_disk *sdkp = to_scsi_disk(dev);
375
376 return sprintf(buf, "%u\n", sdkp->lbpme);
377}
378static DEVICE_ATTR_RO(thin_provisioning);
379
380
381static const char *lbp_mode[] = {
382 [SD_LBP_FULL] = "full",
383 [SD_LBP_UNMAP] = "unmap",
384 [SD_LBP_WS16] = "writesame_16",
385 [SD_LBP_WS10] = "writesame_10",
386 [SD_LBP_ZERO] = "writesame_zero",
387 [SD_LBP_DISABLE] = "disabled",
388};
389
390static ssize_t
391provisioning_mode_show(struct device *dev, struct device_attribute *attr,
392 char *buf)
393{
394 struct scsi_disk *sdkp = to_scsi_disk(dev);
395
396 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
397}
398
399static ssize_t
400provisioning_mode_store(struct device *dev, struct device_attribute *attr,
401 const char *buf, size_t count)
402{
403 struct scsi_disk *sdkp = to_scsi_disk(dev);
404 struct scsi_device *sdp = sdkp->device;
405 int mode;
406
407 if (!capable(CAP_SYS_ADMIN))
408 return -EACCES;
409
410 if (sd_is_zoned(sdkp)) {
411 sd_config_discard(sdkp, SD_LBP_DISABLE);
412 return count;
413 }
414
415 if (sdp->type != TYPE_DISK)
416 return -EINVAL;
417
418 mode = sysfs_match_string(lbp_mode, buf);
419 if (mode < 0)
420 return -EINVAL;
421
422 sd_config_discard(sdkp, mode);
423
424 return count;
425}
426static DEVICE_ATTR_RW(provisioning_mode);
427
428
429static const char *zeroing_mode[] = {
430 [SD_ZERO_WRITE] = "write",
431 [SD_ZERO_WS] = "writesame",
432 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
433 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
434};
435
436static ssize_t
437zeroing_mode_show(struct device *dev, struct device_attribute *attr,
438 char *buf)
439{
440 struct scsi_disk *sdkp = to_scsi_disk(dev);
441
442 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
443}
444
445static ssize_t
446zeroing_mode_store(struct device *dev, struct device_attribute *attr,
447 const char *buf, size_t count)
448{
449 struct scsi_disk *sdkp = to_scsi_disk(dev);
450 int mode;
451
452 if (!capable(CAP_SYS_ADMIN))
453 return -EACCES;
454
455 mode = sysfs_match_string(zeroing_mode, buf);
456 if (mode < 0)
457 return -EINVAL;
458
459 sdkp->zeroing_mode = mode;
460
461 return count;
462}
463static DEVICE_ATTR_RW(zeroing_mode);
464
465static ssize_t
466max_medium_access_timeouts_show(struct device *dev,
467 struct device_attribute *attr, char *buf)
468{
469 struct scsi_disk *sdkp = to_scsi_disk(dev);
470
471 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
472}
473
474static ssize_t
475max_medium_access_timeouts_store(struct device *dev,
476 struct device_attribute *attr, const char *buf,
477 size_t count)
478{
479 struct scsi_disk *sdkp = to_scsi_disk(dev);
480 int err;
481
482 if (!capable(CAP_SYS_ADMIN))
483 return -EACCES;
484
485 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
486
487 return err ? err : count;
488}
489static DEVICE_ATTR_RW(max_medium_access_timeouts);
490
491static ssize_t
492max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
493 char *buf)
494{
495 struct scsi_disk *sdkp = to_scsi_disk(dev);
496
497 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
498}
499
500static ssize_t
501max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
502 const char *buf, size_t count)
503{
504 struct scsi_disk *sdkp = to_scsi_disk(dev);
505 struct scsi_device *sdp = sdkp->device;
506 unsigned long max;
507 int err;
508
509 if (!capable(CAP_SYS_ADMIN))
510 return -EACCES;
511
512 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
513 return -EINVAL;
514
515 err = kstrtoul(buf, 10, &max);
516
517 if (err)
518 return err;
519
520 if (max == 0)
521 sdp->no_write_same = 1;
522 else if (max <= SD_MAX_WS16_BLOCKS) {
523 sdp->no_write_same = 0;
524 sdkp->max_ws_blocks = max;
525 }
526
527 sd_config_write_same(sdkp);
528
529 return count;
530}
531static DEVICE_ATTR_RW(max_write_same_blocks);
532
533static struct attribute *sd_disk_attrs[] = {
534 &dev_attr_cache_type.attr,
535 &dev_attr_FUA.attr,
536 &dev_attr_allow_restart.attr,
537 &dev_attr_manage_start_stop.attr,
538 &dev_attr_protection_type.attr,
539 &dev_attr_protection_mode.attr,
540 &dev_attr_app_tag_own.attr,
541 &dev_attr_thin_provisioning.attr,
542 &dev_attr_provisioning_mode.attr,
543 &dev_attr_zeroing_mode.attr,
544 &dev_attr_max_write_same_blocks.attr,
545 &dev_attr_max_medium_access_timeouts.attr,
546 NULL,
547};
548ATTRIBUTE_GROUPS(sd_disk);
549
550static struct class sd_disk_class = {
551 .name = "scsi_disk",
552 .owner = THIS_MODULE,
553 .dev_release = scsi_disk_release,
554 .dev_groups = sd_disk_groups,
555};
556
557static const struct dev_pm_ops sd_pm_ops = {
558 .suspend = sd_suspend_system,
559 .resume = sd_resume,
560 .poweroff = sd_suspend_system,
561 .restore = sd_resume,
562 .runtime_suspend = sd_suspend_runtime,
563 .runtime_resume = sd_resume,
564};
565
566static struct scsi_driver sd_template = {
567 .gendrv = {
568 .name = "sd",
569 .owner = THIS_MODULE,
570 .probe = sd_probe,
571 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
572 .remove = sd_remove,
573 .shutdown = sd_shutdown,
574 .pm = &sd_pm_ops,
575 },
576 .rescan = sd_rescan,
577 .init_command = sd_init_command,
578 .uninit_command = sd_uninit_command,
579 .done = sd_done,
580 .eh_action = sd_eh_action,
581 .eh_reset = sd_eh_reset,
582};
583
584
585
586
587
588
589static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data)
590{
591 return NULL;
592}
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608static int sd_major(int major_idx)
609{
610 switch (major_idx) {
611 case 0:
612 return SCSI_DISK0_MAJOR;
613 case 1 ... 7:
614 return SCSI_DISK1_MAJOR + major_idx - 1;
615 case 8 ... 15:
616 return SCSI_DISK8_MAJOR + major_idx - 8;
617 default:
618 BUG();
619 return 0;
620 }
621}
622
623static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
624{
625 struct scsi_disk *sdkp = NULL;
626
627 mutex_lock(&sd_ref_mutex);
628
629 if (disk->private_data) {
630 sdkp = scsi_disk(disk);
631 if (scsi_device_get(sdkp->device) == 0)
632 get_device(&sdkp->dev);
633 else
634 sdkp = NULL;
635 }
636 mutex_unlock(&sd_ref_mutex);
637 return sdkp;
638}
639
640static void scsi_disk_put(struct scsi_disk *sdkp)
641{
642 struct scsi_device *sdev = sdkp->device;
643
644 mutex_lock(&sd_ref_mutex);
645 put_device(&sdkp->dev);
646 scsi_device_put(sdev);
647 mutex_unlock(&sd_ref_mutex);
648}
649
650#ifdef CONFIG_BLK_SED_OPAL
651static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
652 size_t len, bool send)
653{
654 struct scsi_device *sdev = data;
655 u8 cdb[12] = { 0, };
656 int ret;
657
658 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
659 cdb[1] = secp;
660 put_unaligned_be16(spsp, &cdb[2]);
661 put_unaligned_be32(len, &cdb[6]);
662
663 ret = scsi_execute_req(sdev, cdb,
664 send ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
665 buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
666 return ret <= 0 ? ret : -EIO;
667}
668#endif
669
670
671
672
673
674static unsigned int sd_prot_op(bool write, bool dix, bool dif)
675{
676
677 static const unsigned int ops[] = {
678 SCSI_PROT_NORMAL,
679 SCSI_PROT_READ_STRIP,
680 SCSI_PROT_READ_INSERT,
681 SCSI_PROT_READ_PASS,
682 SCSI_PROT_NORMAL,
683 SCSI_PROT_WRITE_INSERT,
684 SCSI_PROT_WRITE_STRIP,
685 SCSI_PROT_WRITE_PASS,
686 };
687
688 return ops[write << 2 | dix << 1 | dif];
689}
690
691
692
693
694
695static unsigned int sd_prot_flag_mask(unsigned int prot_op)
696{
697 static const unsigned int flag_mask[] = {
698 [SCSI_PROT_NORMAL] = 0,
699
700 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
701 SCSI_PROT_GUARD_CHECK |
702 SCSI_PROT_REF_CHECK |
703 SCSI_PROT_REF_INCREMENT,
704
705 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
706 SCSI_PROT_IP_CHECKSUM,
707
708 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
709 SCSI_PROT_GUARD_CHECK |
710 SCSI_PROT_REF_CHECK |
711 SCSI_PROT_REF_INCREMENT |
712 SCSI_PROT_IP_CHECKSUM,
713
714 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
715 SCSI_PROT_REF_INCREMENT,
716
717 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
718 SCSI_PROT_REF_CHECK |
719 SCSI_PROT_REF_INCREMENT |
720 SCSI_PROT_IP_CHECKSUM,
721
722 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
723 SCSI_PROT_GUARD_CHECK |
724 SCSI_PROT_REF_CHECK |
725 SCSI_PROT_REF_INCREMENT |
726 SCSI_PROT_IP_CHECKSUM,
727 };
728
729 return flag_mask[prot_op];
730}
731
732static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
733 unsigned int dix, unsigned int dif)
734{
735 struct bio *bio = scmd->request->bio;
736 unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif);
737 unsigned int protect = 0;
738
739 if (dix) {
740 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
741 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
742
743 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
744 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
745 }
746
747 if (dif != T10_PI_TYPE3_PROTECTION) {
748 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
749
750 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
751 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
752 }
753
754 if (dif) {
755 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
756
757 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
758 protect = 3 << 5;
759 else
760 protect = 1 << 5;
761 }
762
763 scsi_set_prot_op(scmd, prot_op);
764 scsi_set_prot_type(scmd, dif);
765 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
766
767 return protect;
768}
769
770static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
771{
772 struct request_queue *q = sdkp->disk->queue;
773 unsigned int logical_block_size = sdkp->device->sector_size;
774 unsigned int max_blocks = 0;
775
776 q->limits.discard_alignment =
777 sdkp->unmap_alignment * logical_block_size;
778 q->limits.discard_granularity =
779 max(sdkp->physical_block_size,
780 sdkp->unmap_granularity * logical_block_size);
781 sdkp->provisioning_mode = mode;
782
783 switch (mode) {
784
785 case SD_LBP_FULL:
786 case SD_LBP_DISABLE:
787 blk_queue_max_discard_sectors(q, 0);
788 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
789 return;
790
791 case SD_LBP_UNMAP:
792 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
793 (u32)SD_MAX_WS16_BLOCKS);
794 break;
795
796 case SD_LBP_WS16:
797 if (sdkp->device->unmap_limit_for_ws)
798 max_blocks = sdkp->max_unmap_blocks;
799 else
800 max_blocks = sdkp->max_ws_blocks;
801
802 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
803 break;
804
805 case SD_LBP_WS10:
806 if (sdkp->device->unmap_limit_for_ws)
807 max_blocks = sdkp->max_unmap_blocks;
808 else
809 max_blocks = sdkp->max_ws_blocks;
810
811 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
812 break;
813
814 case SD_LBP_ZERO:
815 max_blocks = min_not_zero(sdkp->max_ws_blocks,
816 (u32)SD_MAX_WS10_BLOCKS);
817 break;
818 }
819
820 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
821 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
822}
823
824static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
825{
826 struct scsi_device *sdp = cmd->device;
827 struct request *rq = cmd->request;
828 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
829 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
830 unsigned int data_len = 24;
831 char *buf;
832
833 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
834 if (!rq->special_vec.bv_page)
835 return BLK_STS_RESOURCE;
836 clear_highpage(rq->special_vec.bv_page);
837 rq->special_vec.bv_offset = 0;
838 rq->special_vec.bv_len = data_len;
839 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
840
841 cmd->cmd_len = 10;
842 cmd->cmnd[0] = UNMAP;
843 cmd->cmnd[8] = 24;
844
845 buf = page_address(rq->special_vec.bv_page);
846 put_unaligned_be16(6 + 16, &buf[0]);
847 put_unaligned_be16(16, &buf[2]);
848 put_unaligned_be64(lba, &buf[8]);
849 put_unaligned_be32(nr_blocks, &buf[16]);
850
851 cmd->allowed = SD_MAX_RETRIES;
852 cmd->transfersize = data_len;
853 rq->timeout = SD_TIMEOUT;
854
855 return scsi_init_io(cmd);
856}
857
858static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
859 bool unmap)
860{
861 struct scsi_device *sdp = cmd->device;
862 struct request *rq = cmd->request;
863 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
864 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
865 u32 data_len = sdp->sector_size;
866
867 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
868 if (!rq->special_vec.bv_page)
869 return BLK_STS_RESOURCE;
870 clear_highpage(rq->special_vec.bv_page);
871 rq->special_vec.bv_offset = 0;
872 rq->special_vec.bv_len = data_len;
873 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
874
875 cmd->cmd_len = 16;
876 cmd->cmnd[0] = WRITE_SAME_16;
877 if (unmap)
878 cmd->cmnd[1] = 0x8;
879 put_unaligned_be64(lba, &cmd->cmnd[2]);
880 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
881
882 cmd->allowed = SD_MAX_RETRIES;
883 cmd->transfersize = data_len;
884 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
885
886 return scsi_init_io(cmd);
887}
888
889static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
890 bool unmap)
891{
892 struct scsi_device *sdp = cmd->device;
893 struct request *rq = cmd->request;
894 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
895 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
896 u32 data_len = sdp->sector_size;
897
898 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
899 if (!rq->special_vec.bv_page)
900 return BLK_STS_RESOURCE;
901 clear_highpage(rq->special_vec.bv_page);
902 rq->special_vec.bv_offset = 0;
903 rq->special_vec.bv_len = data_len;
904 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
905
906 cmd->cmd_len = 10;
907 cmd->cmnd[0] = WRITE_SAME;
908 if (unmap)
909 cmd->cmnd[1] = 0x8;
910 put_unaligned_be32(lba, &cmd->cmnd[2]);
911 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
912
913 cmd->allowed = SD_MAX_RETRIES;
914 cmd->transfersize = data_len;
915 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
916
917 return scsi_init_io(cmd);
918}
919
920static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
921{
922 struct request *rq = cmd->request;
923 struct scsi_device *sdp = cmd->device;
924 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
925 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
926 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
927
928 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
929 switch (sdkp->zeroing_mode) {
930 case SD_ZERO_WS16_UNMAP:
931 return sd_setup_write_same16_cmnd(cmd, true);
932 case SD_ZERO_WS10_UNMAP:
933 return sd_setup_write_same10_cmnd(cmd, true);
934 }
935 }
936
937 if (sdp->no_write_same)
938 return BLK_STS_TARGET;
939
940 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
941 return sd_setup_write_same16_cmnd(cmd, false);
942
943 return sd_setup_write_same10_cmnd(cmd, false);
944}
945
946static void sd_config_write_same(struct scsi_disk *sdkp)
947{
948 struct request_queue *q = sdkp->disk->queue;
949 unsigned int logical_block_size = sdkp->device->sector_size;
950
951 if (sdkp->device->no_write_same) {
952 sdkp->max_ws_blocks = 0;
953 goto out;
954 }
955
956
957
958
959
960
961 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
962 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
963 (u32)SD_MAX_WS16_BLOCKS);
964 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
965 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
966 (u32)SD_MAX_WS10_BLOCKS);
967 else {
968 sdkp->device->no_write_same = 1;
969 sdkp->max_ws_blocks = 0;
970 }
971
972 if (sdkp->lbprz && sdkp->lbpws)
973 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
974 else if (sdkp->lbprz && sdkp->lbpws10)
975 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
976 else if (sdkp->max_ws_blocks)
977 sdkp->zeroing_mode = SD_ZERO_WS;
978 else
979 sdkp->zeroing_mode = SD_ZERO_WRITE;
980
981 if (sdkp->max_ws_blocks &&
982 sdkp->physical_block_size > logical_block_size) {
983
984
985
986
987
988
989
990
991
992
993
994
995 sdkp->max_ws_blocks =
996 round_down(sdkp->max_ws_blocks,
997 bytes_to_logical(sdkp->device,
998 sdkp->physical_block_size));
999 }
1000
1001out:
1002 blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
1003 (logical_block_size >> 9));
1004 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1005 (logical_block_size >> 9));
1006}
1007
1008
1009
1010
1011
1012
1013
1014
1015static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd)
1016{
1017 struct request *rq = cmd->request;
1018 struct scsi_device *sdp = cmd->device;
1019 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
1020 struct bio *bio = rq->bio;
1021 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
1022 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
1023 blk_status_t ret;
1024
1025 if (sdkp->device->no_write_same)
1026 return BLK_STS_TARGET;
1027
1028 BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
1029
1030 rq->timeout = SD_WRITE_SAME_TIMEOUT;
1031
1032 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) {
1033 cmd->cmd_len = 16;
1034 cmd->cmnd[0] = WRITE_SAME_16;
1035 put_unaligned_be64(lba, &cmd->cmnd[2]);
1036 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1037 } else {
1038 cmd->cmd_len = 10;
1039 cmd->cmnd[0] = WRITE_SAME;
1040 put_unaligned_be32(lba, &cmd->cmnd[2]);
1041 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1042 }
1043
1044 cmd->transfersize = sdp->sector_size;
1045 cmd->allowed = SD_MAX_RETRIES;
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057 rq->__data_len = sdp->sector_size;
1058 ret = scsi_init_io(cmd);
1059 rq->__data_len = blk_rq_bytes(rq);
1060
1061 return ret;
1062}
1063
1064static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
1065{
1066 struct request *rq = cmd->request;
1067
1068
1069 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
1070
1071 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1072 cmd->cmd_len = 10;
1073 cmd->transfersize = 0;
1074 cmd->allowed = SD_MAX_RETRIES;
1075
1076 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
1077 return BLK_STS_OK;
1078}
1079
1080static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
1081 sector_t lba, unsigned int nr_blocks,
1082 unsigned char flags)
1083{
1084 cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
1085 if (unlikely(cmd->cmnd == NULL))
1086 return BLK_STS_RESOURCE;
1087
1088 cmd->cmd_len = SD_EXT_CDB_SIZE;
1089 memset(cmd->cmnd, 0, cmd->cmd_len);
1090
1091 cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
1092 cmd->cmnd[7] = 0x18;
1093 cmd->cmnd[9] = write ? WRITE_32 : READ_32;
1094 cmd->cmnd[10] = flags;
1095 put_unaligned_be64(lba, &cmd->cmnd[12]);
1096 put_unaligned_be32(lba, &cmd->cmnd[20]);
1097 put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
1098
1099 return BLK_STS_OK;
1100}
1101
1102static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
1103 sector_t lba, unsigned int nr_blocks,
1104 unsigned char flags)
1105{
1106 cmd->cmd_len = 16;
1107 cmd->cmnd[0] = write ? WRITE_16 : READ_16;
1108 cmd->cmnd[1] = flags;
1109 cmd->cmnd[14] = 0;
1110 cmd->cmnd[15] = 0;
1111 put_unaligned_be64(lba, &cmd->cmnd[2]);
1112 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1113
1114 return BLK_STS_OK;
1115}
1116
1117static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
1118 sector_t lba, unsigned int nr_blocks,
1119 unsigned char flags)
1120{
1121 cmd->cmd_len = 10;
1122 cmd->cmnd[0] = write ? WRITE_10 : READ_10;
1123 cmd->cmnd[1] = flags;
1124 cmd->cmnd[6] = 0;
1125 cmd->cmnd[9] = 0;
1126 put_unaligned_be32(lba, &cmd->cmnd[2]);
1127 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1128
1129 return BLK_STS_OK;
1130}
1131
1132static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
1133 sector_t lba, unsigned int nr_blocks,
1134 unsigned char flags)
1135{
1136
1137 if (WARN_ON_ONCE(nr_blocks == 0))
1138 return BLK_STS_IOERR;
1139
1140 if (unlikely(flags & 0x8)) {
1141
1142
1143
1144
1145
1146 scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
1147 return BLK_STS_IOERR;
1148 }
1149
1150 cmd->cmd_len = 6;
1151 cmd->cmnd[0] = write ? WRITE_6 : READ_6;
1152 cmd->cmnd[1] = (lba >> 16) & 0x1f;
1153 cmd->cmnd[2] = (lba >> 8) & 0xff;
1154 cmd->cmnd[3] = lba & 0xff;
1155 cmd->cmnd[4] = nr_blocks;
1156 cmd->cmnd[5] = 0;
1157
1158 return BLK_STS_OK;
1159}
1160
1161static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
1162{
1163 struct request *rq = cmd->request;
1164 struct scsi_device *sdp = cmd->device;
1165 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
1166 sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
1167 sector_t threshold;
1168 unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
1169 bool dif, dix;
1170 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
1171 bool write = rq_data_dir(rq) == WRITE;
1172 unsigned char protect, fua;
1173 blk_status_t ret;
1174
1175 ret = scsi_init_io(cmd);
1176 if (ret != BLK_STS_OK)
1177 return ret;
1178
1179 if (!scsi_device_online(sdp) || sdp->changed) {
1180 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
1181 return BLK_STS_IOERR;
1182 }
1183
1184 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) {
1185 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
1186 return BLK_STS_IOERR;
1187 }
1188
1189 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
1190 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
1191 return BLK_STS_IOERR;
1192 }
1193
1194
1195
1196
1197
1198 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
1199
1200 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1201 if (lba < threshold) {
1202
1203 nr_blocks = threshold - lba;
1204 } else {
1205
1206 nr_blocks = 1;
1207 }
1208 }
1209
1210 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
1211 dix = scsi_prot_sg_count(cmd);
1212 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
1213
1214 if (write && dix)
1215 t10_pi_prepare(cmd->request, sdkp->protection_type);
1216
1217 if (dif || dix)
1218 protect = sd_setup_protect_cmnd(cmd, dix, dif);
1219 else
1220 protect = 0;
1221
1222 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
1223 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
1224 protect | fua);
1225 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
1226 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
1227 protect | fua);
1228 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
1229 sdp->use_10_for_rw || protect) {
1230 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
1231 protect | fua);
1232 } else {
1233 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
1234 protect | fua);
1235 }
1236
1237 if (unlikely(ret != BLK_STS_OK))
1238 return ret;
1239
1240
1241
1242
1243
1244
1245 cmd->transfersize = sdp->sector_size;
1246 cmd->underflow = nr_blocks << 9;
1247 cmd->allowed = SD_MAX_RETRIES;
1248 cmd->sdb.length = nr_blocks * sdp->sector_size;
1249
1250 SCSI_LOG_HLQUEUE(1,
1251 scmd_printk(KERN_INFO, cmd,
1252 "%s: block=%llu, count=%d\n", __func__,
1253 (unsigned long long)blk_rq_pos(rq),
1254 blk_rq_sectors(rq)));
1255 SCSI_LOG_HLQUEUE(2,
1256 scmd_printk(KERN_INFO, cmd,
1257 "%s %d/%u 512 byte blocks.\n",
1258 write ? "writing" : "reading", nr_blocks,
1259 blk_rq_sectors(rq)));
1260
1261
1262
1263
1264
1265 return BLK_STS_OK;
1266}
1267
1268static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
1269{
1270 struct request *rq = cmd->request;
1271
1272 switch (req_op(rq)) {
1273 case REQ_OP_DISCARD:
1274 switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
1275 case SD_LBP_UNMAP:
1276 return sd_setup_unmap_cmnd(cmd);
1277 case SD_LBP_WS16:
1278 return sd_setup_write_same16_cmnd(cmd, true);
1279 case SD_LBP_WS10:
1280 return sd_setup_write_same10_cmnd(cmd, true);
1281 case SD_LBP_ZERO:
1282 return sd_setup_write_same10_cmnd(cmd, false);
1283 default:
1284 return BLK_STS_TARGET;
1285 }
1286 case REQ_OP_WRITE_ZEROES:
1287 return sd_setup_write_zeroes_cmnd(cmd);
1288 case REQ_OP_WRITE_SAME:
1289 return sd_setup_write_same_cmnd(cmd);
1290 case REQ_OP_FLUSH:
1291 return sd_setup_flush_cmnd(cmd);
1292 case REQ_OP_READ:
1293 case REQ_OP_WRITE:
1294 return sd_setup_read_write_cmnd(cmd);
1295 case REQ_OP_ZONE_RESET:
1296 return sd_zbc_setup_reset_cmnd(cmd);
1297 default:
1298 WARN_ON_ONCE(1);
1299 return BLK_STS_NOTSUPP;
1300 }
1301}
1302
1303static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1304{
1305 struct request *rq = SCpnt->request;
1306 u8 *cmnd;
1307
1308 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
1309 mempool_free(rq->special_vec.bv_page, sd_page_pool);
1310
1311 if (SCpnt->cmnd != scsi_req(rq)->cmd) {
1312 cmnd = SCpnt->cmnd;
1313 SCpnt->cmnd = NULL;
1314 SCpnt->cmd_len = 0;
1315 mempool_free(cmnd, sd_cdb_pool);
1316 }
1317}
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334static int sd_open(struct block_device *bdev, fmode_t mode)
1335{
1336 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1337 struct scsi_device *sdev;
1338 int retval;
1339
1340 if (!sdkp)
1341 return -ENXIO;
1342
1343 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1344
1345 sdev = sdkp->device;
1346
1347
1348
1349
1350
1351 retval = -ENXIO;
1352 if (!scsi_block_when_processing_errors(sdev))
1353 goto error_out;
1354
1355 if (sdev->removable || sdkp->write_prot)
1356 check_disk_change(bdev);
1357
1358
1359
1360
1361 retval = -ENOMEDIUM;
1362 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1363 goto error_out;
1364
1365
1366
1367
1368
1369 retval = -EROFS;
1370 if (sdkp->write_prot && (mode & FMODE_WRITE))
1371 goto error_out;
1372
1373
1374
1375
1376
1377
1378
1379 retval = -ENXIO;
1380 if (!scsi_device_online(sdev))
1381 goto error_out;
1382
1383 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1384 if (scsi_block_when_processing_errors(sdev))
1385 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1386 }
1387
1388 return 0;
1389
1390error_out:
1391 scsi_disk_put(sdkp);
1392 return retval;
1393}
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408static void sd_release(struct gendisk *disk, fmode_t mode)
1409{
1410 struct scsi_disk *sdkp = scsi_disk(disk);
1411 struct scsi_device *sdev = sdkp->device;
1412
1413 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1414
1415 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1416 if (scsi_block_when_processing_errors(sdev))
1417 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1418 }
1419
1420 scsi_disk_put(sdkp);
1421}
1422
1423static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1424{
1425 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1426 struct scsi_device *sdp = sdkp->device;
1427 struct Scsi_Host *host = sdp->host;
1428 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1429 int diskinfo[4];
1430
1431
1432 diskinfo[0] = 0x40;
1433 diskinfo[1] = 0x20;
1434 diskinfo[2] = capacity >> 11;
1435
1436
1437 if (host->hostt->bios_param)
1438 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1439 else
1440 scsicam_bios_param(bdev, capacity, diskinfo);
1441
1442 geo->heads = diskinfo[0];
1443 geo->sectors = diskinfo[1];
1444 geo->cylinders = diskinfo[2];
1445 return 0;
1446}
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1463 unsigned int cmd, unsigned long arg)
1464{
1465 struct gendisk *disk = bdev->bd_disk;
1466 struct scsi_disk *sdkp = scsi_disk(disk);
1467 struct scsi_device *sdp = sdkp->device;
1468 void __user *p = (void __user *)arg;
1469 int error;
1470
1471 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1472 "cmd=0x%x\n", disk->disk_name, cmd));
1473
1474 error = scsi_verify_blk_ioctl(bdev, cmd);
1475 if (error < 0)
1476 return error;
1477
1478
1479
1480
1481
1482
1483
1484 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
1485 (mode & FMODE_NDELAY) != 0);
1486 if (error)
1487 goto out;
1488
1489 if (is_sed_ioctl(cmd))
1490 return sed_ioctl(sdkp->opal_dev, cmd, p);
1491
1492
1493
1494
1495
1496
1497 switch (cmd) {
1498 case SCSI_IOCTL_GET_IDLUN:
1499 case SCSI_IOCTL_GET_BUS_NUMBER:
1500 error = scsi_ioctl(sdp, cmd, p);
1501 break;
1502 default:
1503 error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
1504 if (error != -ENOTTY)
1505 break;
1506 error = scsi_ioctl(sdp, cmd, p);
1507 break;
1508 }
1509out:
1510 return error;
1511}
1512
1513static void set_media_not_present(struct scsi_disk *sdkp)
1514{
1515 if (sdkp->media_present)
1516 sdkp->device->changed = 1;
1517
1518 if (sdkp->device->removable) {
1519 sdkp->media_present = 0;
1520 sdkp->capacity = 0;
1521 }
1522}
1523
1524static int media_not_present(struct scsi_disk *sdkp,
1525 struct scsi_sense_hdr *sshdr)
1526{
1527 if (!scsi_sense_valid(sshdr))
1528 return 0;
1529
1530
1531 switch (sshdr->sense_key) {
1532 case UNIT_ATTENTION:
1533 case NOT_READY:
1534
1535 if (sshdr->asc == 0x3A) {
1536 set_media_not_present(sdkp);
1537 return 1;
1538 }
1539 }
1540 return 0;
1541}
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1553{
1554 struct scsi_disk *sdkp = scsi_disk_get(disk);
1555 struct scsi_device *sdp;
1556 int retval;
1557
1558 if (!sdkp)
1559 return 0;
1560
1561 sdp = sdkp->device;
1562 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1563
1564
1565
1566
1567
1568
1569
1570 if (!scsi_device_online(sdp)) {
1571 set_media_not_present(sdkp);
1572 goto out;
1573 }
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584 if (scsi_block_when_processing_errors(sdp)) {
1585 struct scsi_sense_hdr sshdr = { 0, };
1586
1587 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
1588 &sshdr);
1589
1590
1591 if (host_byte(retval)) {
1592 set_media_not_present(sdkp);
1593 goto out;
1594 }
1595
1596 if (media_not_present(sdkp, &sshdr))
1597 goto out;
1598 }
1599
1600
1601
1602
1603
1604 if (!sdkp->media_present)
1605 sdp->changed = 1;
1606 sdkp->media_present = 1;
1607out:
1608
1609
1610
1611
1612
1613
1614 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1615 sdp->changed = 0;
1616 scsi_disk_put(sdkp);
1617 return retval;
1618}
1619
1620static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1621{
1622 int retries, res;
1623 struct scsi_device *sdp = sdkp->device;
1624 const int timeout = sdp->request_queue->rq_timeout
1625 * SD_FLUSH_TIMEOUT_MULTIPLIER;
1626 struct scsi_sense_hdr my_sshdr;
1627
1628 if (!scsi_device_online(sdp))
1629 return -ENODEV;
1630
1631
1632 if (!sshdr)
1633 sshdr = &my_sshdr;
1634
1635 for (retries = 3; retries > 0; --retries) {
1636 unsigned char cmd[10] = { 0 };
1637
1638 cmd[0] = SYNCHRONIZE_CACHE;
1639
1640
1641
1642
1643 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
1644 timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL);
1645 if (res == 0)
1646 break;
1647 }
1648
1649 if (res) {
1650 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
1651
1652 if (driver_byte(res) == DRIVER_SENSE)
1653 sd_print_sense_hdr(sdkp, sshdr);
1654
1655
1656 if (scsi_sense_valid(sshdr) &&
1657 (sshdr->asc == 0x3a ||
1658 sshdr->asc == 0x20))
1659
1660 return 0;
1661
1662 switch (host_byte(res)) {
1663
1664 case DID_BAD_TARGET:
1665 case DID_NO_CONNECT:
1666 return 0;
1667
1668 case DID_BUS_BUSY:
1669 case DID_IMM_RETRY:
1670 case DID_REQUEUE:
1671 case DID_SOFT_ERROR:
1672 return -EBUSY;
1673 default:
1674 return -EIO;
1675 }
1676 }
1677 return 0;
1678}
1679
1680static void sd_rescan(struct device *dev)
1681{
1682 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1683
1684 revalidate_disk(sdkp->disk);
1685}
1686
1687
1688#ifdef CONFIG_COMPAT
1689
1690
1691
1692
1693static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1694 unsigned int cmd, unsigned long arg)
1695{
1696 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1697 int error;
1698
1699 error = scsi_ioctl_block_when_processing_errors(sdev, cmd,
1700 (mode & FMODE_NDELAY) != 0);
1701 if (error)
1702 return error;
1703
1704
1705
1706
1707 if (!sdev->host->hostt->compat_ioctl)
1708 return -ENOIOCTLCMD;
1709 return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1710}
1711#endif
1712
1713static char sd_pr_type(enum pr_type type)
1714{
1715 switch (type) {
1716 case PR_WRITE_EXCLUSIVE:
1717 return 0x01;
1718 case PR_EXCLUSIVE_ACCESS:
1719 return 0x03;
1720 case PR_WRITE_EXCLUSIVE_REG_ONLY:
1721 return 0x05;
1722 case PR_EXCLUSIVE_ACCESS_REG_ONLY:
1723 return 0x06;
1724 case PR_WRITE_EXCLUSIVE_ALL_REGS:
1725 return 0x07;
1726 case PR_EXCLUSIVE_ACCESS_ALL_REGS:
1727 return 0x08;
1728 default:
1729 return 0;
1730 }
1731};
1732
1733static int sd_pr_command(struct block_device *bdev, u8 sa,
1734 u64 key, u64 sa_key, u8 type, u8 flags)
1735{
1736 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1737 struct scsi_sense_hdr sshdr;
1738 int result;
1739 u8 cmd[16] = { 0, };
1740 u8 data[24] = { 0, };
1741
1742 cmd[0] = PERSISTENT_RESERVE_OUT;
1743 cmd[1] = sa;
1744 cmd[2] = type;
1745 put_unaligned_be32(sizeof(data), &cmd[5]);
1746
1747 put_unaligned_be64(key, &data[0]);
1748 put_unaligned_be64(sa_key, &data[8]);
1749 data[20] = flags;
1750
1751 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
1752 &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1753
1754 if (driver_byte(result) == DRIVER_SENSE &&
1755 scsi_sense_valid(&sshdr)) {
1756 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1757 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1758 }
1759
1760 return result;
1761}
1762
1763static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1764 u32 flags)
1765{
1766 if (flags & ~PR_FL_IGNORE_KEY)
1767 return -EOPNOTSUPP;
1768 return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
1769 old_key, new_key, 0,
1770 (1 << 0) );
1771}
1772
1773static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1774 u32 flags)
1775{
1776 if (flags)
1777 return -EOPNOTSUPP;
1778 return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
1779}
1780
1781static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1782{
1783 return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
1784}
1785
1786static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1787 enum pr_type type, bool abort)
1788{
1789 return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
1790 sd_pr_type(type), 0);
1791}
1792
1793static int sd_pr_clear(struct block_device *bdev, u64 key)
1794{
1795 return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
1796}
1797
1798static const struct pr_ops sd_pr_ops = {
1799 .pr_register = sd_pr_register,
1800 .pr_reserve = sd_pr_reserve,
1801 .pr_release = sd_pr_release,
1802 .pr_preempt = sd_pr_preempt,
1803 .pr_clear = sd_pr_clear,
1804};
1805
1806static const struct block_device_operations sd_fops = {
1807 .owner = THIS_MODULE,
1808 .open = sd_open,
1809 .release = sd_release,
1810 .ioctl = sd_ioctl,
1811 .getgeo = sd_getgeo,
1812#ifdef CONFIG_COMPAT
1813 .compat_ioctl = sd_compat_ioctl,
1814#endif
1815 .check_events = sd_check_events,
1816 .revalidate_disk = sd_revalidate_disk,
1817 .unlock_native_capacity = sd_unlock_native_capacity,
1818 .report_zones = sd_zbc_report_zones,
1819 .pr_ops = &sd_pr_ops,
1820};
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834static void sd_eh_reset(struct scsi_cmnd *scmd)
1835{
1836 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1837
1838
1839 sdkp->ignore_medium_access_errors = false;
1840}
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
1855{
1856 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1857 struct scsi_device *sdev = scmd->device;
1858
1859 if (!scsi_device_online(sdev) ||
1860 !scsi_medium_access_command(scmd) ||
1861 host_byte(scmd->result) != DID_TIME_OUT ||
1862 eh_disp != SUCCESS)
1863 return eh_disp;
1864
1865
1866
1867
1868
1869
1870
1871
1872 if (!sdkp->ignore_medium_access_errors) {
1873 sdkp->medium_access_timed_out++;
1874 sdkp->ignore_medium_access_errors = true;
1875 }
1876
1877
1878
1879
1880
1881
1882 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1883 scmd_printk(KERN_ERR, scmd,
1884 "Medium access timeout failure. Offlining disk!\n");
1885 mutex_lock(&sdev->state_mutex);
1886 scsi_device_set_state(sdev, SDEV_OFFLINE);
1887 mutex_unlock(&sdev->state_mutex);
1888
1889 return SUCCESS;
1890 }
1891
1892 return eh_disp;
1893}
1894
1895static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1896{
1897 struct request *req = scmd->request;
1898 struct scsi_device *sdev = scmd->device;
1899 unsigned int transferred, good_bytes;
1900 u64 start_lba, end_lba, bad_lba;
1901
1902
1903
1904
1905
1906 if (scsi_bufflen(scmd) <= sdev->sector_size)
1907 return 0;
1908
1909
1910 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
1911 SCSI_SENSE_BUFFERSIZE,
1912 &bad_lba))
1913 return 0;
1914
1915
1916
1917
1918
1919 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
1920 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
1921 if (bad_lba < start_lba || bad_lba >= end_lba)
1922 return 0;
1923
1924
1925
1926
1927
1928 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1929
1930
1931
1932
1933 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
1934
1935 return min(good_bytes, transferred);
1936}
1937
1938
1939
1940
1941
1942
1943
1944
1945static int sd_done(struct scsi_cmnd *SCpnt)
1946{
1947 int result = SCpnt->result;
1948 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
1949 unsigned int sector_size = SCpnt->device->sector_size;
1950 unsigned int resid;
1951 struct scsi_sense_hdr sshdr;
1952 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
1953 struct request *req = SCpnt->request;
1954 int sense_valid = 0;
1955 int sense_deferred = 0;
1956
1957 switch (req_op(req)) {
1958 case REQ_OP_DISCARD:
1959 case REQ_OP_WRITE_ZEROES:
1960 case REQ_OP_WRITE_SAME:
1961 case REQ_OP_ZONE_RESET:
1962 if (!result) {
1963 good_bytes = blk_rq_bytes(req);
1964 scsi_set_resid(SCpnt, 0);
1965 } else {
1966 good_bytes = 0;
1967 scsi_set_resid(SCpnt, blk_rq_bytes(req));
1968 }
1969 break;
1970 default:
1971
1972
1973
1974
1975
1976 resid = scsi_get_resid(SCpnt);
1977 if (resid & (sector_size - 1)) {
1978 sd_printk(KERN_INFO, sdkp,
1979 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1980 resid, sector_size);
1981 resid = min(scsi_bufflen(SCpnt),
1982 round_up(resid, sector_size));
1983 scsi_set_resid(SCpnt, resid);
1984 }
1985 }
1986
1987 if (result) {
1988 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
1989 if (sense_valid)
1990 sense_deferred = scsi_sense_is_deferred(&sshdr);
1991 }
1992 sdkp->medium_access_timed_out = 0;
1993
1994 if (driver_byte(result) != DRIVER_SENSE &&
1995 (!sense_valid || sense_deferred))
1996 goto out;
1997
1998 switch (sshdr.sense_key) {
1999 case HARDWARE_ERROR:
2000 case MEDIUM_ERROR:
2001 good_bytes = sd_completed_bytes(SCpnt);
2002 break;
2003 case RECOVERED_ERROR:
2004 good_bytes = scsi_bufflen(SCpnt);
2005 break;
2006 case NO_SENSE:
2007
2008
2009
2010
2011 SCpnt->result = 0;
2012 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2013 break;
2014 case ABORTED_COMMAND:
2015 if (sshdr.asc == 0x10)
2016 good_bytes = sd_completed_bytes(SCpnt);
2017 break;
2018 case ILLEGAL_REQUEST:
2019 switch (sshdr.asc) {
2020 case 0x10:
2021 good_bytes = sd_completed_bytes(SCpnt);
2022 break;
2023 case 0x20:
2024 case 0x24:
2025 switch (SCpnt->cmnd[0]) {
2026 case UNMAP:
2027 sd_config_discard(sdkp, SD_LBP_DISABLE);
2028 break;
2029 case WRITE_SAME_16:
2030 case WRITE_SAME:
2031 if (SCpnt->cmnd[1] & 8) {
2032 sd_config_discard(sdkp, SD_LBP_DISABLE);
2033 } else {
2034 sdkp->device->no_write_same = 1;
2035 sd_config_write_same(sdkp);
2036 req->rq_flags |= RQF_QUIET;
2037 }
2038 break;
2039 }
2040 }
2041 break;
2042 default:
2043 break;
2044 }
2045
2046 out:
2047 if (sd_is_zoned(sdkp))
2048 sd_zbc_complete(SCpnt, good_bytes, &sshdr);
2049
2050 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2051 "sd_done: completed %d of %d bytes\n",
2052 good_bytes, scsi_bufflen(SCpnt)));
2053
2054 if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt) &&
2055 good_bytes)
2056 t10_pi_complete(SCpnt->request, sdkp->protection_type,
2057 good_bytes / scsi_prot_interval(SCpnt));
2058
2059 return good_bytes;
2060}
2061
2062
2063
2064
2065static void
2066sd_spinup_disk(struct scsi_disk *sdkp)
2067{
2068 unsigned char cmd[10];
2069 unsigned long spintime_expire = 0;
2070 int retries, spintime;
2071 unsigned int the_result;
2072 struct scsi_sense_hdr sshdr;
2073 int sense_valid = 0;
2074
2075 spintime = 0;
2076
2077
2078
2079 do {
2080 retries = 0;
2081
2082 do {
2083 cmd[0] = TEST_UNIT_READY;
2084 memset((void *) &cmd[1], 0, 9);
2085
2086 the_result = scsi_execute_req(sdkp->device, cmd,
2087 DMA_NONE, NULL, 0,
2088 &sshdr, SD_TIMEOUT,
2089 SD_MAX_RETRIES, NULL);
2090
2091
2092
2093
2094
2095
2096 if (media_not_present(sdkp, &sshdr))
2097 return;
2098
2099 if (the_result)
2100 sense_valid = scsi_sense_valid(&sshdr);
2101 retries++;
2102 } while (retries < 3 &&
2103 (!scsi_status_is_good(the_result) ||
2104 ((driver_byte(the_result) == DRIVER_SENSE) &&
2105 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2106
2107 if (driver_byte(the_result) != DRIVER_SENSE) {
2108
2109
2110 if(!spintime && !scsi_status_is_good(the_result)) {
2111 sd_print_result(sdkp, "Test Unit Ready failed",
2112 the_result);
2113 }
2114 break;
2115 }
2116
2117
2118
2119
2120 if (sdkp->device->no_start_on_add)
2121 break;
2122
2123 if (sense_valid && sshdr.sense_key == NOT_READY) {
2124 if (sshdr.asc == 4 && sshdr.ascq == 3)
2125 break;
2126 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2127 break;
2128 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2129 break;
2130 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2131 break;
2132
2133
2134
2135 if (!spintime) {
2136 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
2137 cmd[0] = START_STOP;
2138 cmd[1] = 1;
2139 memset((void *) &cmd[2], 0, 8);
2140 cmd[4] = 1;
2141 if (sdkp->device->start_stop_pwr_cond)
2142 cmd[4] |= 1 << 4;
2143 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
2144 NULL, 0, &sshdr,
2145 SD_TIMEOUT, SD_MAX_RETRIES,
2146 NULL);
2147 spintime_expire = jiffies + 100 * HZ;
2148 spintime = 1;
2149 }
2150
2151 msleep(1000);
2152 printk(KERN_CONT ".");
2153
2154
2155
2156
2157
2158
2159 } else if (sense_valid &&
2160 sshdr.sense_key == UNIT_ATTENTION &&
2161 sshdr.asc == 0x28) {
2162 if (!spintime) {
2163 spintime_expire = jiffies + 5 * HZ;
2164 spintime = 1;
2165 }
2166
2167 msleep(1000);
2168 } else {
2169
2170
2171 if(!spintime) {
2172 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2173 sd_print_sense_hdr(sdkp, &sshdr);
2174 }
2175 break;
2176 }
2177
2178 } while (spintime && time_before_eq(jiffies, spintime_expire));
2179
2180 if (spintime) {
2181 if (scsi_status_is_good(the_result))
2182 printk(KERN_CONT "ready\n");
2183 else
2184 printk(KERN_CONT "not responding...\n");
2185 }
2186}
2187
2188
2189
2190
2191static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
2192{
2193 struct scsi_device *sdp = sdkp->device;
2194 u8 type;
2195 int ret = 0;
2196
2197 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
2198 return ret;
2199
2200 type = ((buffer[12] >> 1) & 7) + 1;
2201
2202 if (type > T10_PI_TYPE3_PROTECTION)
2203 ret = -ENODEV;
2204 else if (scsi_host_dif_capable(sdp->host, type))
2205 ret = 1;
2206
2207 if (sdkp->first_scan || type != sdkp->protection_type)
2208 switch (ret) {
2209 case -ENODEV:
2210 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2211 " protection type %u. Disabling disk!\n",
2212 type);
2213 break;
2214 case 1:
2215 sd_printk(KERN_NOTICE, sdkp,
2216 "Enabling DIF Type %u protection\n", type);
2217 break;
2218 case 0:
2219 sd_printk(KERN_NOTICE, sdkp,
2220 "Disabling DIF Type %u protection\n", type);
2221 break;
2222 }
2223
2224 sdkp->protection_type = type;
2225
2226 return ret;
2227}
2228
2229static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2230 struct scsi_sense_hdr *sshdr, int sense_valid,
2231 int the_result)
2232{
2233 if (driver_byte(the_result) == DRIVER_SENSE)
2234 sd_print_sense_hdr(sdkp, sshdr);
2235 else
2236 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2237
2238
2239
2240
2241
2242 if (sdp->removable &&
2243 sense_valid && sshdr->sense_key == NOT_READY)
2244 set_media_not_present(sdkp);
2245
2246
2247
2248
2249
2250
2251 sdkp->capacity = 0;
2252}
2253
2254#define RC16_LEN 32
2255#if RC16_LEN > SD_BUF_SIZE
2256#error RC16_LEN must not be more than SD_BUF_SIZE
2257#endif
2258
2259#define READ_CAPACITY_RETRIES_ON_RESET 10
2260
2261static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2262 unsigned char *buffer)
2263{
2264 unsigned char cmd[16];
2265 struct scsi_sense_hdr sshdr;
2266 int sense_valid = 0;
2267 int the_result;
2268 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
2269 unsigned int alignment;
2270 unsigned long long lba;
2271 unsigned sector_size;
2272
2273 if (sdp->no_read_capacity_16)
2274 return -EINVAL;
2275
2276 do {
2277 memset(cmd, 0, 16);
2278 cmd[0] = SERVICE_ACTION_IN_16;
2279 cmd[1] = SAI_READ_CAPACITY_16;
2280 cmd[13] = RC16_LEN;
2281 memset(buffer, 0, RC16_LEN);
2282
2283 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2284 buffer, RC16_LEN, &sshdr,
2285 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2286
2287 if (media_not_present(sdkp, &sshdr))
2288 return -ENODEV;
2289
2290 if (the_result) {
2291 sense_valid = scsi_sense_valid(&sshdr);
2292 if (sense_valid &&
2293 sshdr.sense_key == ILLEGAL_REQUEST &&
2294 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2295 sshdr.ascq == 0x00)
2296
2297
2298
2299 return -EINVAL;
2300 if (sense_valid &&
2301 sshdr.sense_key == UNIT_ATTENTION &&
2302 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2303
2304
2305 if (--reset_retries > 0)
2306 continue;
2307 }
2308 retries--;
2309
2310 } while (the_result && retries);
2311
2312 if (the_result) {
2313 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
2314 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2315 return -EINVAL;
2316 }
2317
2318 sector_size = get_unaligned_be32(&buffer[8]);
2319 lba = get_unaligned_be64(&buffer[0]);
2320
2321 if (sd_read_protection_type(sdkp, buffer) < 0) {
2322 sdkp->capacity = 0;
2323 return -ENODEV;
2324 }
2325
2326
2327 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
2328
2329
2330 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2331
2332
2333 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2334 blk_queue_alignment_offset(sdp->request_queue, alignment);
2335 if (alignment && sdkp->first_scan)
2336 sd_printk(KERN_NOTICE, sdkp,
2337 "physical block alignment offset: %u\n", alignment);
2338
2339 if (buffer[14] & 0x80) {
2340 sdkp->lbpme = 1;
2341
2342 if (buffer[14] & 0x40)
2343 sdkp->lbprz = 1;
2344
2345 sd_config_discard(sdkp, SD_LBP_WS16);
2346 }
2347
2348 sdkp->capacity = lba + 1;
2349 return sector_size;
2350}
2351
2352static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2353 unsigned char *buffer)
2354{
2355 unsigned char cmd[16];
2356 struct scsi_sense_hdr sshdr;
2357 int sense_valid = 0;
2358 int the_result;
2359 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
2360 sector_t lba;
2361 unsigned sector_size;
2362
2363 do {
2364 cmd[0] = READ_CAPACITY;
2365 memset(&cmd[1], 0, 9);
2366 memset(buffer, 0, 8);
2367
2368 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2369 buffer, 8, &sshdr,
2370 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2371
2372 if (media_not_present(sdkp, &sshdr))
2373 return -ENODEV;
2374
2375 if (the_result) {
2376 sense_valid = scsi_sense_valid(&sshdr);
2377 if (sense_valid &&
2378 sshdr.sense_key == UNIT_ATTENTION &&
2379 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2380
2381
2382 if (--reset_retries > 0)
2383 continue;
2384 }
2385 retries--;
2386
2387 } while (the_result && retries);
2388
2389 if (the_result) {
2390 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
2391 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2392 return -EINVAL;
2393 }
2394
2395 sector_size = get_unaligned_be32(&buffer[4]);
2396 lba = get_unaligned_be32(&buffer[0]);
2397
2398 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2399
2400
2401
2402 sdkp->capacity = 0;
2403 sdkp->physical_block_size = sector_size;
2404 return sector_size;
2405 }
2406
2407 sdkp->capacity = lba + 1;
2408 sdkp->physical_block_size = sector_size;
2409 return sector_size;
2410}
2411
2412static int sd_try_rc16_first(struct scsi_device *sdp)
2413{
2414 if (sdp->host->max_cmd_len < 16)
2415 return 0;
2416 if (sdp->try_rc_10_first)
2417 return 0;
2418 if (sdp->scsi_level > SCSI_SPC_2)
2419 return 1;
2420 if (scsi_device_protection(sdp))
2421 return 1;
2422 return 0;
2423}
2424
2425
2426
2427
2428static void
2429sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2430{
2431 int sector_size;
2432 struct scsi_device *sdp = sdkp->device;
2433
2434 if (sd_try_rc16_first(sdp)) {
2435 sector_size = read_capacity_16(sdkp, sdp, buffer);
2436 if (sector_size == -EOVERFLOW)
2437 goto got_data;
2438 if (sector_size == -ENODEV)
2439 return;
2440 if (sector_size < 0)
2441 sector_size = read_capacity_10(sdkp, sdp, buffer);
2442 if (sector_size < 0)
2443 return;
2444 } else {
2445 sector_size = read_capacity_10(sdkp, sdp, buffer);
2446 if (sector_size == -EOVERFLOW)
2447 goto got_data;
2448 if (sector_size < 0)
2449 return;
2450 if ((sizeof(sdkp->capacity) > 4) &&
2451 (sdkp->capacity > 0xffffffffULL)) {
2452 int old_sector_size = sector_size;
2453 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2454 "Trying to use READ CAPACITY(16).\n");
2455 sector_size = read_capacity_16(sdkp, sdp, buffer);
2456 if (sector_size < 0) {
2457 sd_printk(KERN_NOTICE, sdkp,
2458 "Using 0xffffffff as device size\n");
2459 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2460 sector_size = old_sector_size;
2461 goto got_data;
2462 }
2463
2464 sdp->try_rc_10_first = 0;
2465 }
2466 }
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478 if (sdp->fix_capacity ||
2479 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2480 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2481 "from its reported value: %llu\n",
2482 (unsigned long long) sdkp->capacity);
2483 --sdkp->capacity;
2484 }
2485
2486got_data:
2487 if (sector_size == 0) {
2488 sector_size = 512;
2489 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2490 "assuming 512.\n");
2491 }
2492
2493 if (sector_size != 512 &&
2494 sector_size != 1024 &&
2495 sector_size != 2048 &&
2496 sector_size != 4096) {
2497 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2498 sector_size);
2499
2500
2501
2502
2503
2504
2505 sdkp->capacity = 0;
2506
2507
2508
2509
2510
2511
2512 sector_size = 512;
2513 }
2514 blk_queue_logical_block_size(sdp->request_queue, sector_size);
2515 blk_queue_physical_block_size(sdp->request_queue,
2516 sdkp->physical_block_size);
2517 sdkp->device->sector_size = sector_size;
2518
2519 if (sdkp->capacity > 0xffffffff)
2520 sdp->use_16_for_rw = 1;
2521
2522}
2523
2524
2525
2526
2527static void
2528sd_print_capacity(struct scsi_disk *sdkp,
2529 sector_t old_capacity)
2530{
2531 int sector_size = sdkp->device->sector_size;
2532 char cap_str_2[10], cap_str_10[10];
2533
2534 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2535 return;
2536
2537 string_get_size(sdkp->capacity, sector_size,
2538 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2539 string_get_size(sdkp->capacity, sector_size,
2540 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
2541
2542 sd_printk(KERN_NOTICE, sdkp,
2543 "%llu %d-byte logical blocks: (%s/%s)\n",
2544 (unsigned long long)sdkp->capacity,
2545 sector_size, cap_str_10, cap_str_2);
2546
2547 if (sdkp->physical_block_size != sector_size)
2548 sd_printk(KERN_NOTICE, sdkp,
2549 "%u-byte physical blocks\n",
2550 sdkp->physical_block_size);
2551
2552 sd_zbc_print_zones(sdkp);
2553}
2554
2555
2556static inline int
2557sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
2558 unsigned char *buffer, int len, struct scsi_mode_data *data,
2559 struct scsi_sense_hdr *sshdr)
2560{
2561 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
2562 SD_TIMEOUT, SD_MAX_RETRIES, data,
2563 sshdr);
2564}
2565
2566
2567
2568
2569
2570static void
2571sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
2572{
2573 int res;
2574 struct scsi_device *sdp = sdkp->device;
2575 struct scsi_mode_data data;
2576 int old_wp = sdkp->write_prot;
2577
2578 set_disk_ro(sdkp->disk, 0);
2579 if (sdp->skip_ms_page_3f) {
2580 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
2581 return;
2582 }
2583
2584 if (sdp->use_192_bytes_for_3f) {
2585 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
2586 } else {
2587
2588
2589
2590
2591
2592 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
2593
2594
2595
2596
2597
2598
2599
2600 if (!scsi_status_is_good(res))
2601 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
2602
2603
2604
2605
2606 if (!scsi_status_is_good(res))
2607 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
2608 &data, NULL);
2609 }
2610
2611 if (!scsi_status_is_good(res)) {
2612 sd_first_printk(KERN_WARNING, sdkp,
2613 "Test WP failed, assume Write Enabled\n");
2614 } else {
2615 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
2616 set_disk_ro(sdkp->disk, sdkp->write_prot);
2617 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2618 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2619 sdkp->write_prot ? "on" : "off");
2620 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
2621 }
2622 }
2623}
2624
2625
2626
2627
2628
2629static void
2630sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
2631{
2632 int len = 0, res;
2633 struct scsi_device *sdp = sdkp->device;
2634
2635 int dbd;
2636 int modepage;
2637 int first_len;
2638 struct scsi_mode_data data;
2639 struct scsi_sense_hdr sshdr;
2640 int old_wce = sdkp->WCE;
2641 int old_rcd = sdkp->RCD;
2642 int old_dpofua = sdkp->DPOFUA;
2643
2644
2645 if (sdkp->cache_override)
2646 return;
2647
2648 first_len = 4;
2649 if (sdp->skip_ms_page_8) {
2650 if (sdp->type == TYPE_RBC)
2651 goto defaults;
2652 else {
2653 if (sdp->skip_ms_page_3f)
2654 goto defaults;
2655 modepage = 0x3F;
2656 if (sdp->use_192_bytes_for_3f)
2657 first_len = 192;
2658 dbd = 0;
2659 }
2660 } else if (sdp->type == TYPE_RBC) {
2661 modepage = 6;
2662 dbd = 8;
2663 } else {
2664 modepage = 8;
2665 dbd = 0;
2666 }
2667
2668
2669 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len,
2670 &data, &sshdr);
2671
2672 if (!scsi_status_is_good(res))
2673 goto bad_sense;
2674
2675 if (!data.header_length) {
2676 modepage = 6;
2677 first_len = 0;
2678 sd_first_printk(KERN_ERR, sdkp,
2679 "Missing header in MODE_SENSE response\n");
2680 }
2681
2682
2683 len = data.length;
2684
2685
2686
2687
2688
2689 if (len < 3)
2690 goto bad_sense;
2691 else if (len > SD_BUF_SIZE) {
2692 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
2693 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2694 len = SD_BUF_SIZE;
2695 }
2696 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2697 len = 192;
2698
2699
2700 if (len > first_len)
2701 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len,
2702 &data, &sshdr);
2703
2704 if (scsi_status_is_good(res)) {
2705 int offset = data.header_length + data.block_descriptor_length;
2706
2707 while (offset < len) {
2708 u8 page_code = buffer[offset] & 0x3F;
2709 u8 spf = buffer[offset] & 0x40;
2710
2711 if (page_code == 8 || page_code == 6) {
2712
2713
2714 if (len - offset <= 2) {
2715 sd_first_printk(KERN_ERR, sdkp,
2716 "Incomplete mode parameter "
2717 "data\n");
2718 goto defaults;
2719 } else {
2720 modepage = page_code;
2721 goto Page_found;
2722 }
2723 } else {
2724
2725 if (spf && len - offset > 3)
2726 offset += 4 + (buffer[offset+2] << 8) +
2727 buffer[offset+3];
2728 else if (!spf && len - offset > 1)
2729 offset += 2 + buffer[offset+1];
2730 else {
2731 sd_first_printk(KERN_ERR, sdkp,
2732 "Incomplete mode "
2733 "parameter data\n");
2734 goto defaults;
2735 }
2736 }
2737 }
2738
2739 sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
2740 goto defaults;
2741
2742 Page_found:
2743 if (modepage == 8) {
2744 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2745 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2746 } else {
2747 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2748 sdkp->RCD = 0;
2749 }
2750
2751 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
2752 if (sdp->broken_fua) {
2753 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2754 sdkp->DPOFUA = 0;
2755 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2756 !sdkp->device->use_16_for_rw) {
2757 sd_first_printk(KERN_NOTICE, sdkp,
2758 "Uses READ/WRITE(6), disabling FUA\n");
2759 sdkp->DPOFUA = 0;
2760 }
2761
2762
2763 if (sdkp->WCE && sdkp->write_prot)
2764 sdkp->WCE = 0;
2765
2766 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2767 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2768 sd_printk(KERN_NOTICE, sdkp,
2769 "Write cache: %s, read cache: %s, %s\n",
2770 sdkp->WCE ? "enabled" : "disabled",
2771 sdkp->RCD ? "disabled" : "enabled",
2772 sdkp->DPOFUA ? "supports DPO and FUA"
2773 : "doesn't support DPO or FUA");
2774
2775 return;
2776 }
2777
2778bad_sense:
2779 if (scsi_sense_valid(&sshdr) &&
2780 sshdr.sense_key == ILLEGAL_REQUEST &&
2781 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
2782
2783 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
2784 else
2785 sd_first_printk(KERN_ERR, sdkp,
2786 "Asking for cache data failed\n");
2787
2788defaults:
2789 if (sdp->wce_default_on) {
2790 sd_first_printk(KERN_NOTICE, sdkp,
2791 "Assuming drive cache: write back\n");
2792 sdkp->WCE = 1;
2793 } else {
2794 sd_first_printk(KERN_ERR, sdkp,
2795 "Assuming drive cache: write through\n");
2796 sdkp->WCE = 0;
2797 }
2798 sdkp->RCD = 0;
2799 sdkp->DPOFUA = 0;
2800}
2801
2802
2803
2804
2805
2806static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
2807{
2808 int res, offset;
2809 struct scsi_device *sdp = sdkp->device;
2810 struct scsi_mode_data data;
2811 struct scsi_sense_hdr sshdr;
2812
2813 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
2814 return;
2815
2816 if (sdkp->protection_type == 0)
2817 return;
2818
2819 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2820 SD_MAX_RETRIES, &data, &sshdr);
2821
2822 if (!scsi_status_is_good(res) || !data.header_length ||
2823 data.length < 6) {
2824 sd_first_printk(KERN_WARNING, sdkp,
2825 "getting Control mode page failed, assume no ATO\n");
2826
2827 if (scsi_sense_valid(&sshdr))
2828 sd_print_sense_hdr(sdkp, &sshdr);
2829
2830 return;
2831 }
2832
2833 offset = data.header_length + data.block_descriptor_length;
2834
2835 if ((buffer[offset] & 0x3f) != 0x0a) {
2836 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
2837 return;
2838 }
2839
2840 if ((buffer[offset + 5] & 0x80) == 0)
2841 return;
2842
2843 sdkp->ATO = 1;
2844
2845 return;
2846}
2847
2848
2849
2850
2851
2852static void sd_read_block_limits(struct scsi_disk *sdkp)
2853{
2854 unsigned int sector_sz = sdkp->device->sector_size;
2855 const int vpd_len = 64;
2856 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
2857
2858 if (!buffer ||
2859
2860 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2861 goto out;
2862
2863 blk_queue_io_min(sdkp->disk->queue,
2864 get_unaligned_be16(&buffer[6]) * sector_sz);
2865
2866 sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
2867 sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
2868
2869 if (buffer[3] == 0x3c) {
2870 unsigned int lba_count, desc_count;
2871
2872 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
2873
2874 if (!sdkp->lbpme)
2875 goto out;
2876
2877 lba_count = get_unaligned_be32(&buffer[20]);
2878 desc_count = get_unaligned_be32(&buffer[24]);
2879
2880 if (lba_count && desc_count)
2881 sdkp->max_unmap_blocks = lba_count;
2882
2883 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
2884
2885 if (buffer[32] & 0x80)
2886 sdkp->unmap_alignment =
2887 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
2888
2889 if (!sdkp->lbpvpd) {
2890
2891 if (sdkp->max_unmap_blocks)
2892 sd_config_discard(sdkp, SD_LBP_UNMAP);
2893 else
2894 sd_config_discard(sdkp, SD_LBP_WS16);
2895
2896 } else {
2897 if (sdkp->lbpu && sdkp->max_unmap_blocks)
2898 sd_config_discard(sdkp, SD_LBP_UNMAP);
2899 else if (sdkp->lbpws)
2900 sd_config_discard(sdkp, SD_LBP_WS16);
2901 else if (sdkp->lbpws10)
2902 sd_config_discard(sdkp, SD_LBP_WS10);
2903 else
2904 sd_config_discard(sdkp, SD_LBP_DISABLE);
2905 }
2906 }
2907
2908 out:
2909 kfree(buffer);
2910}
2911
2912
2913
2914
2915
2916static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2917{
2918 struct request_queue *q = sdkp->disk->queue;
2919 unsigned char *buffer;
2920 u16 rot;
2921 const int vpd_len = 64;
2922
2923 buffer = kmalloc(vpd_len, GFP_KERNEL);
2924
2925 if (!buffer ||
2926
2927 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
2928 goto out;
2929
2930 rot = get_unaligned_be16(&buffer[4]);
2931
2932 if (rot == 1) {
2933 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
2934 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
2935 }
2936
2937 if (sdkp->device->type == TYPE_ZBC) {
2938
2939 q->limits.zoned = BLK_ZONED_HM;
2940 } else {
2941 sdkp->zoned = (buffer[8] >> 4) & 3;
2942 if (sdkp->zoned == 1)
2943
2944 q->limits.zoned = BLK_ZONED_HA;
2945 else
2946
2947
2948
2949
2950 q->limits.zoned = BLK_ZONED_NONE;
2951 }
2952 if (blk_queue_is_zoned(q) && sdkp->first_scan)
2953 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
2954 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
2955
2956 out:
2957 kfree(buffer);
2958}
2959
2960
2961
2962
2963
2964static void sd_read_block_provisioning(struct scsi_disk *sdkp)
2965{
2966 unsigned char *buffer;
2967 const int vpd_len = 8;
2968
2969 if (sdkp->lbpme == 0)
2970 return;
2971
2972 buffer = kmalloc(vpd_len, GFP_KERNEL);
2973
2974 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
2975 goto out;
2976
2977 sdkp->lbpvpd = 1;
2978 sdkp->lbpu = (buffer[5] >> 7) & 1;
2979 sdkp->lbpws = (buffer[5] >> 6) & 1;
2980 sdkp->lbpws10 = (buffer[5] >> 5) & 1;
2981
2982 out:
2983 kfree(buffer);
2984}
2985
2986static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
2987{
2988 struct scsi_device *sdev = sdkp->device;
2989
2990 if (sdev->host->no_write_same) {
2991 sdev->no_write_same = 1;
2992
2993 return;
2994 }
2995
2996 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
2997
2998 int vpd_buf_len = 64;
2999
3000 sdev->no_report_opcodes = 1;
3001
3002
3003
3004
3005
3006 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
3007 sdev->no_write_same = 1;
3008 }
3009
3010 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
3011 sdkp->ws16 = 1;
3012
3013 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
3014 sdkp->ws10 = 1;
3015}
3016
3017static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3018{
3019 struct scsi_device *sdev = sdkp->device;
3020
3021 if (!sdev->security_supported)
3022 return;
3023
3024 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3025 SECURITY_PROTOCOL_IN) == 1 &&
3026 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3027 SECURITY_PROTOCOL_OUT) == 1)
3028 sdkp->security = 1;
3029}
3030
3031
3032
3033
3034
3035
3036static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3037 unsigned int dev_max)
3038{
3039 struct scsi_device *sdp = sdkp->device;
3040 unsigned int opt_xfer_bytes =
3041 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3042
3043 if (sdkp->opt_xfer_blocks == 0)
3044 return false;
3045
3046 if (sdkp->opt_xfer_blocks > dev_max) {
3047 sd_first_printk(KERN_WARNING, sdkp,
3048 "Optimal transfer size %u logical blocks " \
3049 "> dev_max (%u logical blocks)\n",
3050 sdkp->opt_xfer_blocks, dev_max);
3051 return false;
3052 }
3053
3054 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3055 sd_first_printk(KERN_WARNING, sdkp,
3056 "Optimal transfer size %u logical blocks " \
3057 "> sd driver limit (%u logical blocks)\n",
3058 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3059 return false;
3060 }
3061
3062 if (opt_xfer_bytes < PAGE_SIZE) {
3063 sd_first_printk(KERN_WARNING, sdkp,
3064 "Optimal transfer size %u bytes < " \
3065 "PAGE_SIZE (%u bytes)\n",
3066 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3067 return false;
3068 }
3069
3070 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3071 sd_first_printk(KERN_WARNING, sdkp,
3072 "Optimal transfer size %u bytes not a " \
3073 "multiple of physical block size (%u bytes)\n",
3074 opt_xfer_bytes, sdkp->physical_block_size);
3075 return false;
3076 }
3077
3078 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3079 opt_xfer_bytes);
3080 return true;
3081}
3082
3083
3084
3085
3086
3087
3088static int sd_revalidate_disk(struct gendisk *disk)
3089{
3090 struct scsi_disk *sdkp = scsi_disk(disk);
3091 struct scsi_device *sdp = sdkp->device;
3092 struct request_queue *q = sdkp->disk->queue;
3093 sector_t old_capacity = sdkp->capacity;
3094 unsigned char *buffer;
3095 unsigned int dev_max, rw_max;
3096
3097 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3098 "sd_revalidate_disk\n"));
3099
3100
3101
3102
3103
3104 if (!scsi_device_online(sdp))
3105 goto out;
3106
3107 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
3108 if (!buffer) {
3109 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3110 "allocation failure.\n");
3111 goto out;
3112 }
3113
3114 sd_spinup_disk(sdkp);
3115
3116
3117
3118
3119
3120 if (sdkp->media_present) {
3121 sd_read_capacity(sdkp, buffer);
3122
3123
3124
3125
3126
3127
3128
3129 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3130 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3131
3132 if (scsi_device_supports_vpd(sdp)) {
3133 sd_read_block_provisioning(sdkp);
3134 sd_read_block_limits(sdkp);
3135 sd_read_block_characteristics(sdkp);
3136 sd_zbc_read_zones(sdkp, buffer);
3137 }
3138
3139 sd_print_capacity(sdkp, old_capacity);
3140
3141 sd_read_write_protect_flag(sdkp, buffer);
3142 sd_read_cache_type(sdkp, buffer);
3143 sd_read_app_tag_own(sdkp, buffer);
3144 sd_read_write_same(sdkp, buffer);
3145 sd_read_security(sdkp, buffer);
3146 }
3147
3148
3149
3150
3151
3152 sd_set_flush_flag(sdkp);
3153
3154
3155 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3156
3157
3158 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3159 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3160
3161 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
3162 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3163 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
3164 } else
3165 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3166 (sector_t)BLK_DEF_MAX_SECTORS);
3167
3168
3169 rw_max = min(rw_max, queue_max_hw_sectors(q));
3170
3171
3172
3173
3174
3175 if (sdkp->first_scan ||
3176 q->limits.max_sectors > q->limits.max_dev_sectors ||
3177 q->limits.max_sectors > q->limits.max_hw_sectors)
3178 q->limits.max_sectors = rw_max;
3179
3180 sdkp->first_scan = 0;
3181
3182 set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
3183 sd_config_write_same(sdkp);
3184 kfree(buffer);
3185
3186 out:
3187 return 0;
3188}
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202static void sd_unlock_native_capacity(struct gendisk *disk)
3203{
3204 struct scsi_device *sdev = scsi_disk(disk)->device;
3205
3206 if (sdev->host->hostt->unlock_native_capacity)
3207 sdev->host->hostt->unlock_native_capacity(sdev);
3208}
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3233{
3234 const int base = 'z' - 'a' + 1;
3235 char *begin = buf + strlen(prefix);
3236 char *end = buf + buflen;
3237 char *p;
3238 int unit;
3239
3240 p = end - 1;
3241 *p = '\0';
3242 unit = base;
3243 do {
3244 if (p == begin)
3245 return -EINVAL;
3246 *--p = 'a' + (index % unit);
3247 index = (index / unit) - 1;
3248 } while (index >= 0);
3249
3250 memmove(begin, p, end - p);
3251 memcpy(buf, prefix, strlen(prefix));
3252
3253 return 0;
3254}
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274static int sd_probe(struct device *dev)
3275{
3276 struct scsi_device *sdp = to_scsi_device(dev);
3277 struct scsi_disk *sdkp;
3278 struct gendisk *gd;
3279 int index;
3280 int error;
3281
3282 scsi_autopm_get_device(sdp);
3283 error = -ENODEV;
3284 if (sdp->type != TYPE_DISK &&
3285 sdp->type != TYPE_ZBC &&
3286 sdp->type != TYPE_MOD &&
3287 sdp->type != TYPE_RBC)
3288 goto out;
3289
3290#ifndef CONFIG_BLK_DEV_ZONED
3291 if (sdp->type == TYPE_ZBC)
3292 goto out;
3293#endif
3294 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
3295 "sd_probe\n"));
3296
3297 error = -ENOMEM;
3298 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
3299 if (!sdkp)
3300 goto out;
3301
3302 gd = alloc_disk(SD_MINORS);
3303 if (!gd)
3304 goto out_free;
3305
3306 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3307 if (index < 0) {
3308 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
3309 goto out_put;
3310 }
3311
3312 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
3313 if (error) {
3314 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
3315 goto out_free_index;
3316 }
3317
3318 sdkp->device = sdp;
3319 sdkp->driver = &sd_template;
3320 sdkp->disk = gd;
3321 sdkp->index = index;
3322 atomic_set(&sdkp->openers, 0);
3323 atomic_set(&sdkp->device->ioerr_cnt, 0);
3324
3325 if (!sdp->request_queue->rq_timeout) {
3326 if (sdp->type != TYPE_MOD)
3327 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3328 else
3329 blk_queue_rq_timeout(sdp->request_queue,
3330 SD_MOD_TIMEOUT);
3331 }
3332
3333 device_initialize(&sdkp->dev);
3334 sdkp->dev.parent = dev;
3335 sdkp->dev.class = &sd_disk_class;
3336 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
3337
3338 error = device_add(&sdkp->dev);
3339 if (error)
3340 goto out_free_index;
3341
3342 get_device(dev);
3343 dev_set_drvdata(dev, sdkp);
3344
3345 gd->major = sd_major((index & 0xf0) >> 4);
3346 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
3347
3348 gd->fops = &sd_fops;
3349 gd->private_data = &sdkp->driver;
3350 gd->queue = sdkp->device->request_queue;
3351
3352
3353 sdp->sector_size = 512;
3354 sdkp->capacity = 0;
3355 sdkp->media_present = 1;
3356 sdkp->write_prot = 0;
3357 sdkp->cache_override = 0;
3358 sdkp->WCE = 0;
3359 sdkp->RCD = 0;
3360 sdkp->ATO = 0;
3361 sdkp->first_scan = 1;
3362 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3363
3364 sd_revalidate_disk(gd);
3365
3366 gd->flags = GENHD_FL_EXT_DEVT;
3367 if (sdp->removable) {
3368 gd->flags |= GENHD_FL_REMOVABLE;
3369 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3370 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3371 }
3372
3373 blk_pm_runtime_init(sdp->request_queue, dev);
3374 device_add_disk(dev, gd, NULL);
3375 if (sdkp->capacity)
3376 sd_dif_config_host(sdkp);
3377
3378 sd_revalidate_disk(gd);
3379
3380 if (sdkp->security) {
3381 sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit);
3382 if (sdkp->opal_dev)
3383 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3384 }
3385
3386 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3387 sdp->removable ? "removable " : "");
3388 scsi_autopm_put_device(sdp);
3389
3390 return 0;
3391
3392 out_free_index:
3393 ida_free(&sd_index_ida, index);
3394 out_put:
3395 put_disk(gd);
3396 out_free:
3397 kfree(sdkp);
3398 out:
3399 scsi_autopm_put_device(sdp);
3400 return error;
3401}
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414static int sd_remove(struct device *dev)
3415{
3416 struct scsi_disk *sdkp;
3417 dev_t devt;
3418
3419 sdkp = dev_get_drvdata(dev);
3420 devt = disk_devt(sdkp->disk);
3421 scsi_autopm_get_device(sdkp->device);
3422
3423 async_synchronize_full_domain(&scsi_sd_pm_domain);
3424 device_del(&sdkp->dev);
3425 del_gendisk(sdkp->disk);
3426 sd_shutdown(dev);
3427
3428 free_opal_dev(sdkp->opal_dev);
3429
3430 blk_register_region(devt, SD_MINORS, NULL,
3431 sd_default_probe, NULL, NULL);
3432
3433 mutex_lock(&sd_ref_mutex);
3434 dev_set_drvdata(dev, NULL);
3435 put_device(&sdkp->dev);
3436 mutex_unlock(&sd_ref_mutex);
3437
3438 return 0;
3439}
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450static void scsi_disk_release(struct device *dev)
3451{
3452 struct scsi_disk *sdkp = to_scsi_disk(dev);
3453 struct gendisk *disk = sdkp->disk;
3454 struct request_queue *q = disk->queue;
3455
3456 ida_free(&sd_index_ida, sdkp->index);
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466 blk_mq_freeze_queue(q);
3467 blk_mq_unfreeze_queue(q);
3468
3469 disk->private_data = NULL;
3470 put_disk(disk);
3471 put_device(&sdkp->device->sdev_gendev);
3472
3473 kfree(sdkp);
3474}
3475
3476static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
3477{
3478 unsigned char cmd[6] = { START_STOP };
3479 struct scsi_sense_hdr sshdr;
3480 struct scsi_device *sdp = sdkp->device;
3481 int res;
3482
3483 if (start)
3484 cmd[4] |= 1;
3485
3486 if (sdp->start_stop_pwr_cond)
3487 cmd[4] |= start ? 1 << 4 : 3 << 4;
3488
3489 if (!scsi_device_online(sdp))
3490 return -ENODEV;
3491
3492 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
3493 SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL);
3494 if (res) {
3495 sd_print_result(sdkp, "Start/Stop Unit failed", res);
3496 if (driver_byte(res) == DRIVER_SENSE)
3497 sd_print_sense_hdr(sdkp, &sshdr);
3498 if (scsi_sense_valid(&sshdr) &&
3499
3500 sshdr.asc == 0x3a)
3501 res = 0;
3502 }
3503
3504
3505 if (res)
3506 return -EIO;
3507
3508 return 0;
3509}
3510
3511
3512
3513
3514
3515
3516static void sd_shutdown(struct device *dev)
3517{
3518 struct scsi_disk *sdkp = dev_get_drvdata(dev);
3519
3520 if (!sdkp)
3521 return;
3522
3523 if (pm_runtime_suspended(dev))
3524 return;
3525
3526 if (sdkp->WCE && sdkp->media_present) {
3527 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
3528 sd_sync_cache(sdkp, NULL);
3529 }
3530
3531 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3532 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3533 sd_start_stop_device(sdkp, 0);
3534 }
3535}
3536
3537static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
3538{
3539 struct scsi_disk *sdkp = dev_get_drvdata(dev);
3540 struct scsi_sense_hdr sshdr;
3541 int ret = 0;
3542
3543 if (!sdkp)
3544 return 0;
3545
3546 if (sdkp->WCE && sdkp->media_present) {
3547 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
3548 ret = sd_sync_cache(sdkp, &sshdr);
3549
3550 if (ret) {
3551
3552 if (ret == -ENODEV)
3553 return 0;
3554
3555 if (!scsi_sense_valid(&sshdr) ||
3556 sshdr.sense_key != ILLEGAL_REQUEST)
3557 return ret;
3558
3559
3560
3561
3562
3563
3564 ret = 0;
3565 }
3566 }
3567
3568 if (sdkp->device->manage_start_stop) {
3569 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3570
3571 ret = sd_start_stop_device(sdkp, 0);
3572 if (ignore_stop_errors)
3573 ret = 0;
3574 }
3575
3576 return ret;
3577}
3578
3579static int sd_suspend_system(struct device *dev)
3580{
3581 return sd_suspend_common(dev, true);
3582}
3583
3584static int sd_suspend_runtime(struct device *dev)
3585{
3586 return sd_suspend_common(dev, false);
3587}
3588
3589static int sd_resume(struct device *dev)
3590{
3591 struct scsi_disk *sdkp = dev_get_drvdata(dev);
3592 int ret;
3593
3594 if (!sdkp)
3595 return 0;
3596
3597 if (!sdkp->device->manage_start_stop)
3598 return 0;
3599
3600 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
3601 ret = sd_start_stop_device(sdkp, 1);
3602 if (!ret)
3603 opal_unlock_from_suspend(sdkp->opal_dev);
3604 return ret;
3605}
3606
3607
3608
3609
3610
3611
3612
3613static int __init init_sd(void)
3614{
3615 int majors = 0, i, err;
3616
3617 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3618
3619 for (i = 0; i < SD_MAJORS; i++) {
3620 if (register_blkdev(sd_major(i), "sd") != 0)
3621 continue;
3622 majors++;
3623 blk_register_region(sd_major(i), SD_MINORS, NULL,
3624 sd_default_probe, NULL, NULL);
3625 }
3626
3627 if (!majors)
3628 return -ENODEV;
3629
3630 err = class_register(&sd_disk_class);
3631 if (err)
3632 goto err_out;
3633
3634 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3635 0, 0, NULL);
3636 if (!sd_cdb_cache) {
3637 printk(KERN_ERR "sd: can't init extended cdb cache\n");
3638 err = -ENOMEM;
3639 goto err_out_class;
3640 }
3641
3642 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3643 if (!sd_cdb_pool) {
3644 printk(KERN_ERR "sd: can't init extended cdb pool\n");
3645 err = -ENOMEM;
3646 goto err_out_cache;
3647 }
3648
3649 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3650 if (!sd_page_pool) {
3651 printk(KERN_ERR "sd: can't init discard page pool\n");
3652 err = -ENOMEM;
3653 goto err_out_ppool;
3654 }
3655
3656 err = scsi_register_driver(&sd_template.gendrv);
3657 if (err)
3658 goto err_out_driver;
3659
3660 return 0;
3661
3662err_out_driver:
3663 mempool_destroy(sd_page_pool);
3664
3665err_out_ppool:
3666 mempool_destroy(sd_cdb_pool);
3667
3668err_out_cache:
3669 kmem_cache_destroy(sd_cdb_cache);
3670
3671err_out_class:
3672 class_unregister(&sd_disk_class);
3673err_out:
3674 for (i = 0; i < SD_MAJORS; i++)
3675 unregister_blkdev(sd_major(i), "sd");
3676 return err;
3677}
3678
3679
3680
3681
3682
3683
3684static void __exit exit_sd(void)
3685{
3686 int i;
3687
3688 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3689
3690 scsi_unregister_driver(&sd_template.gendrv);
3691 mempool_destroy(sd_cdb_pool);
3692 mempool_destroy(sd_page_pool);
3693 kmem_cache_destroy(sd_cdb_cache);
3694
3695 class_unregister(&sd_disk_class);
3696
3697 for (i = 0; i < SD_MAJORS; i++) {
3698 blk_unregister_region(sd_major(i), SD_MINORS);
3699 unregister_blkdev(sd_major(i), "sd");
3700 }
3701}
3702
3703module_init(init_sd);
3704module_exit(exit_sd);
3705
3706static void sd_print_sense_hdr(struct scsi_disk *sdkp,
3707 struct scsi_sense_hdr *sshdr)
3708{
3709 scsi_print_sense_hdr(sdkp->device,
3710 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
3711}
3712
3713static void sd_print_result(const struct scsi_disk *sdkp, const char *msg,
3714 int result)
3715{
3716 const char *hb_string = scsi_hostbyte_string(result);
3717 const char *db_string = scsi_driverbyte_string(result);
3718
3719 if (hb_string || db_string)
3720 sd_printk(KERN_INFO, sdkp,
3721 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
3722 hb_string ? hb_string : "invalid",
3723 db_string ? db_string : "invalid");
3724 else
3725 sd_printk(KERN_INFO, sdkp,
3726 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3727 msg, host_byte(result), driver_byte(result));
3728}
3729
3730