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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <scsi/scsi_cmnd.h>
13#include <scsi/scsi_device.h>
14#include <linux/libata.h>
15
16#include "libata.h"
17#include "libata-transport.h"
18
19
20const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
21EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
22const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
23EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
24const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
25EXPORT_SYMBOL_GPL(sata_deb_timing_long);
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38
39int sata_scr_valid(struct ata_link *link)
40{
41 struct ata_port *ap = link->ap;
42
43 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
44}
45EXPORT_SYMBOL_GPL(sata_scr_valid);
46
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63int sata_scr_read(struct ata_link *link, int reg, u32 *val)
64{
65 if (ata_is_host_link(link)) {
66 if (sata_scr_valid(link))
67 return link->ap->ops->scr_read(link, reg, val);
68 return -EOPNOTSUPP;
69 }
70
71 return sata_pmp_scr_read(link, reg, val);
72}
73EXPORT_SYMBOL_GPL(sata_scr_read);
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90
91int sata_scr_write(struct ata_link *link, int reg, u32 val)
92{
93 if (ata_is_host_link(link)) {
94 if (sata_scr_valid(link))
95 return link->ap->ops->scr_write(link, reg, val);
96 return -EOPNOTSUPP;
97 }
98
99 return sata_pmp_scr_write(link, reg, val);
100}
101EXPORT_SYMBOL_GPL(sata_scr_write);
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118int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
119{
120 if (ata_is_host_link(link)) {
121 int rc;
122
123 if (sata_scr_valid(link)) {
124 rc = link->ap->ops->scr_write(link, reg, val);
125 if (rc == 0)
126 rc = link->ap->ops->scr_read(link, reg, &val);
127 return rc;
128 }
129 return -EOPNOTSUPP;
130 }
131
132 return sata_pmp_scr_write(link, reg, val);
133}
134EXPORT_SYMBOL_GPL(sata_scr_write_flush);
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148
149void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
150{
151 fis[0] = 0x27;
152 fis[1] = pmp & 0xf;
153 if (is_cmd)
154 fis[1] |= (1 << 7);
155
156 fis[2] = tf->command;
157 fis[3] = tf->feature;
158
159 fis[4] = tf->lbal;
160 fis[5] = tf->lbam;
161 fis[6] = tf->lbah;
162 fis[7] = tf->device;
163
164 fis[8] = tf->hob_lbal;
165 fis[9] = tf->hob_lbam;
166 fis[10] = tf->hob_lbah;
167 fis[11] = tf->hob_feature;
168
169 fis[12] = tf->nsect;
170 fis[13] = tf->hob_nsect;
171 fis[14] = 0;
172 fis[15] = tf->ctl;
173
174 fis[16] = tf->auxiliary & 0xff;
175 fis[17] = (tf->auxiliary >> 8) & 0xff;
176 fis[18] = (tf->auxiliary >> 16) & 0xff;
177 fis[19] = (tf->auxiliary >> 24) & 0xff;
178}
179EXPORT_SYMBOL_GPL(ata_tf_to_fis);
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191
192void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
193{
194 tf->command = fis[2];
195 tf->feature = fis[3];
196
197 tf->lbal = fis[4];
198 tf->lbam = fis[5];
199 tf->lbah = fis[6];
200 tf->device = fis[7];
201
202 tf->hob_lbal = fis[8];
203 tf->hob_lbam = fis[9];
204 tf->hob_lbah = fis[10];
205
206 tf->nsect = fis[12];
207 tf->hob_nsect = fis[13];
208}
209EXPORT_SYMBOL_GPL(ata_tf_from_fis);
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233int sata_link_debounce(struct ata_link *link, const unsigned long *params,
234 unsigned long deadline)
235{
236 unsigned long interval = params[0];
237 unsigned long duration = params[1];
238 unsigned long last_jiffies, t;
239 u32 last, cur;
240 int rc;
241
242 t = ata_deadline(jiffies, params[2]);
243 if (time_before(t, deadline))
244 deadline = t;
245
246 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
247 return rc;
248 cur &= 0xf;
249
250 last = cur;
251 last_jiffies = jiffies;
252
253 while (1) {
254 ata_msleep(link->ap, interval);
255 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
256 return rc;
257 cur &= 0xf;
258
259
260 if (cur == last) {
261 if (cur == 1 && time_before(jiffies, deadline))
262 continue;
263 if (time_after(jiffies,
264 ata_deadline(last_jiffies, duration)))
265 return 0;
266 continue;
267 }
268
269
270 last = cur;
271 last_jiffies = jiffies;
272
273
274
275
276 if (time_after(jiffies, deadline))
277 return -EPIPE;
278 }
279}
280EXPORT_SYMBOL_GPL(sata_link_debounce);
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295
296int sata_link_resume(struct ata_link *link, const unsigned long *params,
297 unsigned long deadline)
298{
299 int tries = ATA_LINK_RESUME_TRIES;
300 u32 scontrol, serror;
301 int rc;
302
303 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
304 return rc;
305
306
307
308
309
310
311 do {
312 scontrol = (scontrol & 0x0f0) | 0x300;
313 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
314 return rc;
315
316
317
318
319
320 if (!(link->flags & ATA_LFLAG_NO_DB_DELAY))
321 ata_msleep(link->ap, 200);
322
323
324 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
325 return rc;
326 } while ((scontrol & 0xf0f) != 0x300 && --tries);
327
328 if ((scontrol & 0xf0f) != 0x300) {
329 ata_link_warn(link, "failed to resume link (SControl %X)\n",
330 scontrol);
331 return 0;
332 }
333
334 if (tries < ATA_LINK_RESUME_TRIES)
335 ata_link_warn(link, "link resume succeeded after %d retries\n",
336 ATA_LINK_RESUME_TRIES - tries);
337
338 if ((rc = sata_link_debounce(link, params, deadline)))
339 return rc;
340
341
342 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
343 rc = sata_scr_write(link, SCR_ERROR, serror);
344
345 return rc != -EINVAL ? rc : 0;
346}
347EXPORT_SYMBOL_GPL(sata_link_resume);
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367int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
368 bool spm_wakeup)
369{
370 struct ata_eh_context *ehc = &link->eh_context;
371 bool woken_up = false;
372 u32 scontrol;
373 int rc;
374
375 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
376 if (rc)
377 return rc;
378
379 switch (policy) {
380 case ATA_LPM_MAX_POWER:
381
382 scontrol |= (0x7 << 8);
383
384 if (spm_wakeup) {
385 scontrol |= (0x4 << 12);
386 woken_up = true;
387 }
388 break;
389 case ATA_LPM_MED_POWER:
390
391 scontrol &= ~(0x1 << 8);
392 scontrol |= (0x6 << 8);
393 break;
394 case ATA_LPM_MED_POWER_WITH_DIPM:
395 case ATA_LPM_MIN_POWER_WITH_PARTIAL:
396 case ATA_LPM_MIN_POWER:
397 if (ata_link_nr_enabled(link) > 0)
398
399 scontrol &= ~(0x7 << 8);
400 else {
401
402 scontrol &= ~0xf;
403 scontrol |= (0x1 << 2);
404 }
405 break;
406 default:
407 WARN_ON(1);
408 }
409
410 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
411 if (rc)
412 return rc;
413
414
415 if (woken_up)
416 msleep(10);
417
418
419 ehc->i.serror &= ~SERR_PHYRDY_CHG;
420 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
421}
422EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
423
424static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
425{
426 struct ata_link *host_link = &link->ap->link;
427 u32 limit, target, spd;
428
429 limit = link->sata_spd_limit;
430
431
432
433
434
435 if (!ata_is_host_link(link) && host_link->sata_spd)
436 limit &= (1 << host_link->sata_spd) - 1;
437
438 if (limit == UINT_MAX)
439 target = 0;
440 else
441 target = fls(limit);
442
443 spd = (*scontrol >> 4) & 0xf;
444 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
445
446 return spd != target;
447}
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463
464static int sata_set_spd_needed(struct ata_link *link)
465{
466 u32 scontrol;
467
468 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
469 return 1;
470
471 return __sata_set_spd_needed(link, &scontrol);
472}
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486
487int sata_set_spd(struct ata_link *link)
488{
489 u32 scontrol;
490 int rc;
491
492 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
493 return rc;
494
495 if (!__sata_set_spd_needed(link, &scontrol))
496 return 0;
497
498 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
499 return rc;
500
501 return 1;
502}
503EXPORT_SYMBOL_GPL(sata_set_spd);
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529int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
530 unsigned long deadline,
531 bool *online, int (*check_ready)(struct ata_link *))
532{
533 u32 scontrol;
534 int rc;
535
536 DPRINTK("ENTER\n");
537
538 if (online)
539 *online = false;
540
541 if (sata_set_spd_needed(link)) {
542
543
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545
546
547 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
548 goto out;
549
550 scontrol = (scontrol & 0x0f0) | 0x304;
551
552 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
553 goto out;
554
555 sata_set_spd(link);
556 }
557
558
559 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
560 goto out;
561
562 scontrol = (scontrol & 0x0f0) | 0x301;
563
564 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
565 goto out;
566
567
568
569
570 ata_msleep(link->ap, 1);
571
572
573 rc = sata_link_resume(link, timing, deadline);
574 if (rc)
575 goto out;
576
577 if (ata_phys_link_offline(link))
578 goto out;
579
580
581 if (online)
582 *online = true;
583
584 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
585
586
587
588
589
590 if (check_ready) {
591 unsigned long pmp_deadline;
592
593 pmp_deadline = ata_deadline(jiffies,
594 ATA_TMOUT_PMP_SRST_WAIT);
595 if (time_after(pmp_deadline, deadline))
596 pmp_deadline = deadline;
597 ata_wait_ready(link, pmp_deadline, check_ready);
598 }
599 rc = -EAGAIN;
600 goto out;
601 }
602
603 rc = 0;
604 if (check_ready)
605 rc = ata_wait_ready(link, deadline, check_ready);
606 out:
607 if (rc && rc != -EAGAIN) {
608
609 if (online)
610 *online = false;
611 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
612 }
613 DPRINTK("EXIT, rc=%d\n", rc);
614 return rc;
615}
616EXPORT_SYMBOL_GPL(sata_link_hardreset);
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638int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active)
639{
640 u64 done_mask, ap_qc_active = ap->qc_active;
641 int nr_done = 0;
642
643
644
645
646
647
648 if (ap_qc_active & (1ULL << ATA_TAG_INTERNAL)) {
649 qc_active |= (qc_active & 0x01) << ATA_TAG_INTERNAL;
650 qc_active ^= qc_active & 0x01;
651 }
652
653 done_mask = ap_qc_active ^ qc_active;
654
655 if (unlikely(done_mask & qc_active)) {
656 ata_port_err(ap, "illegal qc_active transition (%08llx->%08llx)\n",
657 ap->qc_active, qc_active);
658 return -EINVAL;
659 }
660
661 while (done_mask) {
662 struct ata_queued_cmd *qc;
663 unsigned int tag = __ffs64(done_mask);
664
665 qc = ata_qc_from_tag(ap, tag);
666 if (qc) {
667 ata_qc_complete(qc);
668 nr_done++;
669 }
670 done_mask &= ~(1ULL << tag);
671 }
672
673 return nr_done;
674}
675EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
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723int ata_slave_link_init(struct ata_port *ap)
724{
725 struct ata_link *link;
726
727 WARN_ON(ap->slave_link);
728 WARN_ON(ap->flags & ATA_FLAG_PMP);
729
730 link = kzalloc(sizeof(*link), GFP_KERNEL);
731 if (!link)
732 return -ENOMEM;
733
734 ata_link_init(ap, link, 1);
735 ap->slave_link = link;
736 return 0;
737}
738EXPORT_SYMBOL_GPL(ata_slave_link_init);
739
740
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742
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750
751
752bool sata_lpm_ignore_phy_events(struct ata_link *link)
753{
754 unsigned long lpm_timeout = link->last_lpm_change +
755 msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
756
757
758 if (link->lpm_policy > ATA_LPM_MAX_POWER)
759 return true;
760
761
762
763
764 if ((link->flags & ATA_LFLAG_CHANGED) &&
765 time_before(jiffies, lpm_timeout))
766 return true;
767
768 return false;
769}
770EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events);
771
772static const char *ata_lpm_policy_names[] = {
773 [ATA_LPM_UNKNOWN] = "max_performance",
774 [ATA_LPM_MAX_POWER] = "max_performance",
775 [ATA_LPM_MED_POWER] = "medium_power",
776 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
777 [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
778 [ATA_LPM_MIN_POWER] = "min_power",
779};
780
781static ssize_t ata_scsi_lpm_store(struct device *device,
782 struct device_attribute *attr,
783 const char *buf, size_t count)
784{
785 struct Scsi_Host *shost = class_to_shost(device);
786 struct ata_port *ap = ata_shost_to_port(shost);
787 struct ata_link *link;
788 struct ata_device *dev;
789 enum ata_lpm_policy policy;
790 unsigned long flags;
791
792
793 for (policy = ATA_LPM_MAX_POWER;
794 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
795 const char *name = ata_lpm_policy_names[policy];
796
797 if (strncmp(name, buf, strlen(name)) == 0)
798 break;
799 }
800 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
801 return -EINVAL;
802
803 spin_lock_irqsave(ap->lock, flags);
804
805 ata_for_each_link(link, ap, EDGE) {
806 ata_for_each_dev(dev, &ap->link, ENABLED) {
807 if (dev->horkage & ATA_HORKAGE_NOLPM) {
808 count = -EOPNOTSUPP;
809 goto out_unlock;
810 }
811 }
812 }
813
814 ap->target_lpm_policy = policy;
815 ata_port_schedule_eh(ap);
816out_unlock:
817 spin_unlock_irqrestore(ap->lock, flags);
818 return count;
819}
820
821static ssize_t ata_scsi_lpm_show(struct device *dev,
822 struct device_attribute *attr, char *buf)
823{
824 struct Scsi_Host *shost = class_to_shost(dev);
825 struct ata_port *ap = ata_shost_to_port(shost);
826
827 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
828 return -EINVAL;
829
830 return sysfs_emit(buf, "%s\n",
831 ata_lpm_policy_names[ap->target_lpm_policy]);
832}
833DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
834 ata_scsi_lpm_show, ata_scsi_lpm_store);
835EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
836
837static ssize_t ata_ncq_prio_supported_show(struct device *device,
838 struct device_attribute *attr,
839 char *buf)
840{
841 struct scsi_device *sdev = to_scsi_device(device);
842 struct ata_port *ap = ata_shost_to_port(sdev->host);
843 struct ata_device *dev;
844 bool ncq_prio_supported;
845 int rc = 0;
846
847 spin_lock_irq(ap->lock);
848 dev = ata_scsi_find_dev(ap, sdev);
849 if (!dev)
850 rc = -ENODEV;
851 else
852 ncq_prio_supported = dev->flags & ATA_DFLAG_NCQ_PRIO;
853 spin_unlock_irq(ap->lock);
854
855 return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_supported);
856}
857
858DEVICE_ATTR(ncq_prio_supported, S_IRUGO, ata_ncq_prio_supported_show, NULL);
859EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_supported);
860
861static ssize_t ata_ncq_prio_enable_show(struct device *device,
862 struct device_attribute *attr,
863 char *buf)
864{
865 struct scsi_device *sdev = to_scsi_device(device);
866 struct ata_port *ap = ata_shost_to_port(sdev->host);
867 struct ata_device *dev;
868 bool ncq_prio_enable;
869 int rc = 0;
870
871 spin_lock_irq(ap->lock);
872 dev = ata_scsi_find_dev(ap, sdev);
873 if (!dev)
874 rc = -ENODEV;
875 else
876 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
877 spin_unlock_irq(ap->lock);
878
879 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
880}
881
882static ssize_t ata_ncq_prio_enable_store(struct device *device,
883 struct device_attribute *attr,
884 const char *buf, size_t len)
885{
886 struct scsi_device *sdev = to_scsi_device(device);
887 struct ata_port *ap;
888 struct ata_device *dev;
889 long int input;
890 int rc = 0;
891
892 rc = kstrtol(buf, 10, &input);
893 if (rc)
894 return rc;
895 if ((input < 0) || (input > 1))
896 return -EINVAL;
897
898 ap = ata_shost_to_port(sdev->host);
899 dev = ata_scsi_find_dev(ap, sdev);
900 if (unlikely(!dev))
901 return -ENODEV;
902
903 spin_lock_irq(ap->lock);
904
905 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
906 rc = -EINVAL;
907 goto unlock;
908 }
909
910 if (input)
911 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
912 else
913 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
914
915unlock:
916 spin_unlock_irq(ap->lock);
917
918 return rc ? rc : len;
919}
920
921DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
922 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
923EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
924
925static struct attribute *ata_ncq_sdev_attrs[] = {
926 &dev_attr_unload_heads.attr,
927 &dev_attr_ncq_prio_enable.attr,
928 &dev_attr_ncq_prio_supported.attr,
929 NULL
930};
931
932static const struct attribute_group ata_ncq_sdev_attr_group = {
933 .attrs = ata_ncq_sdev_attrs
934};
935
936const struct attribute_group *ata_ncq_sdev_groups[] = {
937 &ata_ncq_sdev_attr_group,
938 NULL
939};
940EXPORT_SYMBOL_GPL(ata_ncq_sdev_groups);
941
942static ssize_t
943ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
944 const char *buf, size_t count)
945{
946 struct Scsi_Host *shost = class_to_shost(dev);
947 struct ata_port *ap = ata_shost_to_port(shost);
948 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
949 return ap->ops->em_store(ap, buf, count);
950 return -EINVAL;
951}
952
953static ssize_t
954ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
955 char *buf)
956{
957 struct Scsi_Host *shost = class_to_shost(dev);
958 struct ata_port *ap = ata_shost_to_port(shost);
959
960 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
961 return ap->ops->em_show(ap, buf);
962 return -EINVAL;
963}
964DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
965 ata_scsi_em_message_show, ata_scsi_em_message_store);
966EXPORT_SYMBOL_GPL(dev_attr_em_message);
967
968static ssize_t
969ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
970 char *buf)
971{
972 struct Scsi_Host *shost = class_to_shost(dev);
973 struct ata_port *ap = ata_shost_to_port(shost);
974
975 return snprintf(buf, 23, "%d\n", ap->em_message_type);
976}
977DEVICE_ATTR(em_message_type, S_IRUGO,
978 ata_scsi_em_message_type_show, NULL);
979EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
980
981static ssize_t
982ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
983 char *buf)
984{
985 struct scsi_device *sdev = to_scsi_device(dev);
986 struct ata_port *ap = ata_shost_to_port(sdev->host);
987 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
988
989 if (atadev && ap->ops->sw_activity_show &&
990 (ap->flags & ATA_FLAG_SW_ACTIVITY))
991 return ap->ops->sw_activity_show(atadev, buf);
992 return -EINVAL;
993}
994
995static ssize_t
996ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
997 const char *buf, size_t count)
998{
999 struct scsi_device *sdev = to_scsi_device(dev);
1000 struct ata_port *ap = ata_shost_to_port(sdev->host);
1001 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
1002 enum sw_activity val;
1003 int rc;
1004
1005 if (atadev && ap->ops->sw_activity_store &&
1006 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
1007 val = simple_strtoul(buf, NULL, 0);
1008 switch (val) {
1009 case OFF: case BLINK_ON: case BLINK_OFF:
1010 rc = ap->ops->sw_activity_store(atadev, val);
1011 if (!rc)
1012 return count;
1013 else
1014 return rc;
1015 }
1016 }
1017 return -EINVAL;
1018}
1019DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
1020 ata_scsi_activity_store);
1021EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1034 int queue_depth)
1035{
1036 struct ata_device *dev;
1037 unsigned long flags;
1038
1039 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1040 return sdev->queue_depth;
1041
1042 dev = ata_scsi_find_dev(ap, sdev);
1043 if (!dev || !ata_dev_enabled(dev))
1044 return sdev->queue_depth;
1045
1046
1047 spin_lock_irqsave(ap->lock, flags);
1048 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1049 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1050 dev->flags |= ATA_DFLAG_NCQ_OFF;
1051 queue_depth = 1;
1052 }
1053 spin_unlock_irqrestore(ap->lock, flags);
1054
1055
1056 queue_depth = min(queue_depth, sdev->host->can_queue);
1057 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1058 queue_depth = min(queue_depth, ATA_MAX_QUEUE);
1059
1060 if (sdev->queue_depth == queue_depth)
1061 return -EINVAL;
1062
1063 return scsi_change_queue_depth(sdev, queue_depth);
1064}
1065EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1083{
1084 struct ata_port *ap = ata_shost_to_port(sdev->host);
1085
1086 return __ata_change_queue_depth(ap, sdev, queue_depth);
1087}
1088EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103struct ata_port *ata_sas_port_alloc(struct ata_host *host,
1104 struct ata_port_info *port_info,
1105 struct Scsi_Host *shost)
1106{
1107 struct ata_port *ap;
1108
1109 ap = ata_port_alloc(host);
1110 if (!ap)
1111 return NULL;
1112
1113 ap->port_no = 0;
1114 ap->lock = &host->lock;
1115 ap->pio_mask = port_info->pio_mask;
1116 ap->mwdma_mask = port_info->mwdma_mask;
1117 ap->udma_mask = port_info->udma_mask;
1118 ap->flags |= port_info->flags;
1119 ap->ops = port_info->port_ops;
1120 ap->cbl = ATA_CBL_SATA;
1121
1122 return ap;
1123}
1124EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138int ata_sas_port_start(struct ata_port *ap)
1139{
1140
1141
1142
1143
1144 if (!ap->ops->error_handler)
1145 ap->pflags &= ~ATA_PFLAG_FROZEN;
1146 return 0;
1147}
1148EXPORT_SYMBOL_GPL(ata_sas_port_start);
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160void ata_sas_port_stop(struct ata_port *ap)
1161{
1162}
1163EXPORT_SYMBOL_GPL(ata_sas_port_stop);
1164
1165
1166
1167
1168
1169
1170
1171
1172void ata_sas_async_probe(struct ata_port *ap)
1173{
1174 __ata_port_probe(ap);
1175}
1176EXPORT_SYMBOL_GPL(ata_sas_async_probe);
1177
1178int ata_sas_sync_probe(struct ata_port *ap)
1179{
1180 return ata_port_probe(ap);
1181}
1182EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196int ata_sas_port_init(struct ata_port *ap)
1197{
1198 int rc = ap->ops->port_start(ap);
1199
1200 if (rc)
1201 return rc;
1202 ap->print_id = atomic_inc_return(&ata_print_id);
1203 return 0;
1204}
1205EXPORT_SYMBOL_GPL(ata_sas_port_init);
1206
1207int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
1208{
1209 return ata_tport_add(parent, ap);
1210}
1211EXPORT_SYMBOL_GPL(ata_sas_tport_add);
1212
1213void ata_sas_tport_delete(struct ata_port *ap)
1214{
1215 ata_tport_delete(ap);
1216}
1217EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
1218
1219
1220
1221
1222
1223
1224
1225void ata_sas_port_destroy(struct ata_port *ap)
1226{
1227 if (ap->ops->port_stop)
1228 ap->ops->port_stop(ap);
1229 kfree(ap);
1230}
1231EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
1243{
1244 ata_scsi_sdev_config(sdev);
1245 ata_scsi_dev_config(sdev, ap->link.device);
1246 return 0;
1247}
1248EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
1261{
1262 int rc = 0;
1263
1264 ata_scsi_dump_cdb(ap, cmd);
1265
1266 if (likely(ata_dev_enabled(ap->link.device)))
1267 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
1268 else {
1269 cmd->result = (DID_BAD_TARGET << 16);
1270 scsi_done(cmd);
1271 }
1272 return rc;
1273}
1274EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
1275
1276int ata_sas_allocate_tag(struct ata_port *ap)
1277{
1278 unsigned int max_queue = ap->host->n_tags;
1279 unsigned int i, tag;
1280
1281 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
1282 tag = tag < max_queue ? tag : 0;
1283
1284
1285 if (ata_tag_internal(tag))
1286 continue;
1287
1288 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
1289 ap->sas_last_tag = tag;
1290 return tag;
1291 }
1292 }
1293 return -1;
1294}
1295
1296void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
1297{
1298 clear_bit(tag, &ap->sas_tag_allocated);
1299}
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314int sata_async_notification(struct ata_port *ap)
1315{
1316 u32 sntf;
1317 int rc;
1318
1319 if (!(ap->flags & ATA_FLAG_AN))
1320 return 0;
1321
1322 rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
1323 if (rc == 0)
1324 sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
1325
1326 if (!sata_pmp_attached(ap) || rc) {
1327
1328 if (!sata_pmp_attached(ap)) {
1329
1330
1331
1332
1333 struct ata_device *dev = ap->link.device;
1334
1335 if ((dev->class == ATA_DEV_ATAPI) &&
1336 (dev->flags & ATA_DFLAG_AN))
1337 ata_scsi_media_change_notify(dev);
1338 return 0;
1339 } else {
1340
1341
1342
1343
1344
1345 ata_port_schedule_eh(ap);
1346 return 1;
1347 }
1348 } else {
1349
1350 struct ata_link *link;
1351
1352
1353 ata_for_each_link(link, ap, EDGE) {
1354 if (!(sntf & (1 << link->pmp)))
1355 continue;
1356
1357 if ((link->device->class == ATA_DEV_ATAPI) &&
1358 (link->device->flags & ATA_DFLAG_AN))
1359 ata_scsi_media_change_notify(link->device);
1360 }
1361
1362
1363
1364
1365 if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
1366 ata_port_schedule_eh(ap);
1367 return 1;
1368 }
1369
1370 return 0;
1371 }
1372}
1373EXPORT_SYMBOL_GPL(sata_async_notification);
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390static int ata_eh_read_log_10h(struct ata_device *dev,
1391 int *tag, struct ata_taskfile *tf)
1392{
1393 u8 *buf = dev->link->ap->sector_buf;
1394 unsigned int err_mask;
1395 u8 csum;
1396 int i;
1397
1398 err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1);
1399 if (err_mask)
1400 return -EIO;
1401
1402 csum = 0;
1403 for (i = 0; i < ATA_SECT_SIZE; i++)
1404 csum += buf[i];
1405 if (csum)
1406 ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n",
1407 csum);
1408
1409 if (buf[0] & 0x80)
1410 return -ENOENT;
1411
1412 *tag = buf[0] & 0x1f;
1413
1414 tf->command = buf[2];
1415 tf->feature = buf[3];
1416 tf->lbal = buf[4];
1417 tf->lbam = buf[5];
1418 tf->lbah = buf[6];
1419 tf->device = buf[7];
1420 tf->hob_lbal = buf[8];
1421 tf->hob_lbam = buf[9];
1422 tf->hob_lbah = buf[10];
1423 tf->nsect = buf[12];
1424 tf->hob_nsect = buf[13];
1425 if (dev->class == ATA_DEV_ZAC && ata_id_has_ncq_autosense(dev->id))
1426 tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16];
1427
1428 return 0;
1429}
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443void ata_eh_analyze_ncq_error(struct ata_link *link)
1444{
1445 struct ata_port *ap = link->ap;
1446 struct ata_eh_context *ehc = &link->eh_context;
1447 struct ata_device *dev = link->device;
1448 struct ata_queued_cmd *qc;
1449 struct ata_taskfile tf;
1450 int tag, rc;
1451
1452
1453 if (ap->pflags & ATA_PFLAG_FROZEN)
1454 return;
1455
1456
1457 if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
1458 return;
1459
1460
1461 ata_qc_for_each_raw(ap, qc, tag) {
1462 if (!(qc->flags & ATA_QCFLAG_FAILED))
1463 continue;
1464
1465 if (qc->err_mask)
1466 return;
1467 }
1468
1469
1470 memset(&tf, 0, sizeof(tf));
1471 rc = ata_eh_read_log_10h(dev, &tag, &tf);
1472 if (rc) {
1473 ata_link_err(link, "failed to read log page 10h (errno=%d)\n",
1474 rc);
1475 return;
1476 }
1477
1478 if (!(link->sactive & (1 << tag))) {
1479 ata_link_err(link, "log page 10h reported inactive tag %d\n",
1480 tag);
1481 return;
1482 }
1483
1484
1485 qc = __ata_qc_from_tag(ap, tag);
1486 memcpy(&qc->result_tf, &tf, sizeof(tf));
1487 qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1488 qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
1489 if (dev->class == ATA_DEV_ZAC &&
1490 ((qc->result_tf.command & ATA_SENSE) || qc->result_tf.auxiliary)) {
1491 char sense_key, asc, ascq;
1492
1493 sense_key = (qc->result_tf.auxiliary >> 16) & 0xff;
1494 asc = (qc->result_tf.auxiliary >> 8) & 0xff;
1495 ascq = qc->result_tf.auxiliary & 0xff;
1496 ata_scsi_set_sense(dev, qc->scsicmd, sense_key, asc, ascq);
1497 ata_scsi_set_sense_information(dev, qc->scsicmd,
1498 &qc->result_tf);
1499 qc->flags |= ATA_QCFLAG_SENSE_VALID;
1500 }
1501
1502 ehc->i.err_mask &= ~AC_ERR_DEV;
1503}
1504EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
1505