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8
9#include <linux/kernel.h>
10#include <linux/export.h>
11#include <linux/libata.h>
12#include <linux/slab.h>
13#include "libata.h"
14#include "libata-transport.h"
15
16const struct ata_port_operations sata_pmp_port_ops = {
17 .inherits = &sata_port_ops,
18 .pmp_prereset = ata_std_prereset,
19 .pmp_hardreset = sata_std_hardreset,
20 .pmp_postreset = ata_std_postreset,
21 .error_handler = sata_pmp_error_handler,
22};
23
24
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26
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28
29
30
31
32
33
34
35
36
37
38static unsigned int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val)
39{
40 struct ata_port *ap = link->ap;
41 struct ata_device *pmp_dev = ap->link.device;
42 struct ata_taskfile tf;
43 unsigned int err_mask;
44
45 ata_tf_init(pmp_dev, &tf);
46 tf.command = ATA_CMD_PMP_READ;
47 tf.protocol = ATA_PROT_NODATA;
48 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
49 tf.feature = reg;
50 tf.device = link->pmp;
51
52 err_mask = ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0,
53 SATA_PMP_RW_TIMEOUT);
54 if (err_mask)
55 return err_mask;
56
57 *r_val = tf.nsect | tf.lbal << 8 | tf.lbam << 16 | tf.lbah << 24;
58 return 0;
59}
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75static unsigned int sata_pmp_write(struct ata_link *link, int reg, u32 val)
76{
77 struct ata_port *ap = link->ap;
78 struct ata_device *pmp_dev = ap->link.device;
79 struct ata_taskfile tf;
80
81 ata_tf_init(pmp_dev, &tf);
82 tf.command = ATA_CMD_PMP_WRITE;
83 tf.protocol = ATA_PROT_NODATA;
84 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
85 tf.feature = reg;
86 tf.device = link->pmp;
87 tf.nsect = val & 0xff;
88 tf.lbal = (val >> 8) & 0xff;
89 tf.lbam = (val >> 16) & 0xff;
90 tf.lbah = (val >> 24) & 0xff;
91
92 return ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0,
93 SATA_PMP_RW_TIMEOUT);
94}
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc)
110{
111 struct ata_link *link = qc->dev->link;
112 struct ata_port *ap = link->ap;
113
114 if (ap->excl_link == NULL || ap->excl_link == link) {
115 if (ap->nr_active_links == 0 || ata_link_active(link)) {
116 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
117 return ata_std_qc_defer(qc);
118 }
119
120 ap->excl_link = link;
121 }
122
123 return ATA_DEFER_PORT;
124}
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val)
142{
143 unsigned int err_mask;
144
145 if (reg > SATA_PMP_PSCR_CONTROL)
146 return -EINVAL;
147
148 err_mask = sata_pmp_read(link, reg, r_val);
149 if (err_mask) {
150 ata_link_warn(link, "failed to read SCR %d (Emask=0x%x)\n",
151 reg, err_mask);
152 return -EIO;
153 }
154 return 0;
155}
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
173{
174 unsigned int err_mask;
175
176 if (reg > SATA_PMP_PSCR_CONTROL)
177 return -EINVAL;
178
179 err_mask = sata_pmp_write(link, reg, val);
180 if (err_mask) {
181 ata_link_warn(link, "failed to write SCR %d (Emask=0x%x)\n",
182 reg, err_mask);
183 return -EIO;
184 }
185 return 0;
186}
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
204 unsigned hints)
205{
206 return sata_link_scr_lpm(link, policy, true);
207}
208
209
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215
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221
222
223static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr)
224{
225 static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 };
226 int i;
227
228 for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) {
229 int reg = gscr_to_read[i];
230 unsigned int err_mask;
231
232 err_mask = sata_pmp_read(dev->link, reg, &gscr[reg]);
233 if (err_mask) {
234 ata_dev_err(dev, "failed to read PMP GSCR[%d] (Emask=0x%x)\n",
235 reg, err_mask);
236 return -EIO;
237 }
238 }
239
240 return 0;
241}
242
243static const char *sata_pmp_spec_rev_str(const u32 *gscr)
244{
245 u32 rev = gscr[SATA_PMP_GSCR_REV];
246
247 if (rev & (1 << 3))
248 return "1.2";
249 if (rev & (1 << 2))
250 return "1.1";
251 if (rev & (1 << 1))
252 return "1.0";
253 return "<unknown>";
254}
255
256#define PMP_GSCR_SII_POL 129
257
258static int sata_pmp_configure(struct ata_device *dev, int print_info)
259{
260 struct ata_port *ap = dev->link->ap;
261 u32 *gscr = dev->gscr;
262 u16 vendor = sata_pmp_gscr_vendor(gscr);
263 u16 devid = sata_pmp_gscr_devid(gscr);
264 unsigned int err_mask = 0;
265 const char *reason;
266 int nr_ports, rc;
267
268 nr_ports = sata_pmp_gscr_ports(gscr);
269
270 if (nr_ports <= 0 || nr_ports > SATA_PMP_MAX_PORTS) {
271 rc = -EINVAL;
272 reason = "invalid nr_ports";
273 goto fail;
274 }
275
276 if ((ap->flags & ATA_FLAG_AN) &&
277 (gscr[SATA_PMP_GSCR_FEAT] & SATA_PMP_FEAT_NOTIFY))
278 dev->flags |= ATA_DFLAG_AN;
279
280
281 err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN,
282 SERR_PHYRDY_CHG);
283 if (err_mask) {
284 rc = -EIO;
285 reason = "failed to write GSCR_ERROR_EN";
286 goto fail;
287 }
288
289
290
291
292
293
294
295 if (vendor == 0x1095 && (devid == 0x3726 || devid == 0x3826)) {
296 u32 reg;
297
298 err_mask = sata_pmp_read(&ap->link, PMP_GSCR_SII_POL, ®);
299 if (err_mask) {
300 rc = -EIO;
301 reason = "failed to read Sil3x26 Private Register";
302 goto fail;
303 }
304 reg &= ~0x1;
305 err_mask = sata_pmp_write(&ap->link, PMP_GSCR_SII_POL, reg);
306 if (err_mask) {
307 rc = -EIO;
308 reason = "failed to write Sil3x26 Private Register";
309 goto fail;
310 }
311 }
312
313 if (print_info) {
314 ata_dev_info(dev, "Port Multiplier %s, "
315 "0x%04x:0x%04x r%d, %d ports, feat 0x%x/0x%x\n",
316 sata_pmp_spec_rev_str(gscr), vendor, devid,
317 sata_pmp_gscr_rev(gscr),
318 nr_ports, gscr[SATA_PMP_GSCR_FEAT_EN],
319 gscr[SATA_PMP_GSCR_FEAT]);
320
321 if (!(dev->flags & ATA_DFLAG_AN))
322 ata_dev_info(dev,
323 "Asynchronous notification not supported, "
324 "hotplug won't work on fan-out ports. Use warm-plug instead.\n");
325 }
326
327 return 0;
328
329 fail:
330 ata_dev_err(dev,
331 "failed to configure Port Multiplier (%s, Emask=0x%x)\n",
332 reason, err_mask);
333 return rc;
334}
335
336static int sata_pmp_init_links (struct ata_port *ap, int nr_ports)
337{
338 struct ata_link *pmp_link = ap->pmp_link;
339 int i, err;
340
341 if (!pmp_link) {
342 pmp_link = kcalloc(SATA_PMP_MAX_PORTS, sizeof(pmp_link[0]),
343 GFP_NOIO);
344 if (!pmp_link)
345 return -ENOMEM;
346
347 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
348 ata_link_init(ap, &pmp_link[i], i);
349
350 ap->pmp_link = pmp_link;
351
352 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
353 err = ata_tlink_add(&pmp_link[i]);
354 if (err) {
355 goto err_tlink;
356 }
357 }
358 }
359
360 for (i = 0; i < nr_ports; i++) {
361 struct ata_link *link = &pmp_link[i];
362 struct ata_eh_context *ehc = &link->eh_context;
363
364 link->flags = 0;
365 ehc->i.probe_mask |= ATA_ALL_DEVICES;
366 ehc->i.action |= ATA_EH_RESET;
367 }
368
369 return 0;
370 err_tlink:
371 while (--i >= 0)
372 ata_tlink_delete(&pmp_link[i]);
373 kfree(pmp_link);
374 ap->pmp_link = NULL;
375 return err;
376}
377
378static void sata_pmp_quirks(struct ata_port *ap)
379{
380 u32 *gscr = ap->link.device->gscr;
381 u16 vendor = sata_pmp_gscr_vendor(gscr);
382 u16 devid = sata_pmp_gscr_devid(gscr);
383 struct ata_link *link;
384
385 if (vendor == 0x1095 && (devid == 0x3726 || devid == 0x3826)) {
386
387 ata_for_each_link(link, ap, EDGE) {
388
389 link->flags |= ATA_LFLAG_NO_LPM;
390
391
392
393
394
395 if (link->pmp < 5)
396 link->flags |= ATA_LFLAG_NO_SRST |
397 ATA_LFLAG_ASSUME_ATA;
398
399
400 if (link->pmp == 5)
401 link->flags |= ATA_LFLAG_NO_SRST |
402 ATA_LFLAG_ASSUME_SEMB;
403 }
404 } else if (vendor == 0x1095 && devid == 0x4723) {
405
406
407
408
409
410
411
412 ata_for_each_link(link, ap, EDGE)
413 link->flags |= ATA_LFLAG_NO_LPM |
414 ATA_LFLAG_NO_SRST |
415 ATA_LFLAG_ASSUME_ATA;
416 } else if (vendor == 0x1095 && devid == 0x4726) {
417
418 ata_for_each_link(link, ap, EDGE) {
419
420 link->flags |= ATA_LFLAG_NO_LPM;
421
422
423
424
425
426
427 if (link->pmp <= 5)
428 link->flags |= ATA_LFLAG_NO_SRST |
429 ATA_LFLAG_ASSUME_ATA;
430
431
432
433
434 if (link->pmp == 6)
435 link->flags |= ATA_LFLAG_NO_SRST |
436 ATA_LFLAG_ASSUME_SEMB;
437 }
438 } else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 ||
439 devid == 0x5734 || devid == 0x5744)) {
440
441
442
443
444
445
446
447
448 ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
449 } else if (vendor == 0x197b && (devid == 0x2352 || devid == 0x0325)) {
450
451
452
453
454 ata_for_each_link(link, ap, EDGE) {
455
456
457
458 link->flags |= ATA_LFLAG_NO_LPM |
459 ATA_LFLAG_NO_SRST |
460 ATA_LFLAG_ASSUME_ATA;
461 }
462 } else if (vendor == 0x11ab && devid == 0x4140) {
463
464 ata_for_each_link(link, ap, EDGE) {
465
466 if (link->pmp == 4)
467 link->flags |= ATA_LFLAG_DISABLED;
468 }
469 }
470}
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485int sata_pmp_attach(struct ata_device *dev)
486{
487 struct ata_link *link = dev->link;
488 struct ata_port *ap = link->ap;
489 unsigned long flags;
490 struct ata_link *tlink;
491 int rc;
492
493
494 if (!sata_pmp_supported(ap)) {
495 ata_dev_err(dev, "host does not support Port Multiplier\n");
496 return -EINVAL;
497 }
498
499 if (!ata_is_host_link(link)) {
500 ata_dev_err(dev, "Port Multipliers cannot be nested\n");
501 return -EINVAL;
502 }
503
504 if (dev->devno) {
505 ata_dev_err(dev, "Port Multiplier must be the first device\n");
506 return -EINVAL;
507 }
508
509 WARN_ON(link->pmp != 0);
510 link->pmp = SATA_PMP_CTRL_PORT;
511
512
513 rc = sata_pmp_read_gscr(dev, dev->gscr);
514 if (rc)
515 goto fail;
516
517
518 rc = sata_pmp_configure(dev, 1);
519 if (rc)
520 goto fail;
521
522 rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr));
523 if (rc) {
524 ata_dev_info(dev, "failed to initialize PMP links\n");
525 goto fail;
526 }
527
528
529 spin_lock_irqsave(ap->lock, flags);
530 WARN_ON(ap->nr_pmp_links);
531 ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr);
532 spin_unlock_irqrestore(ap->lock, flags);
533
534 sata_pmp_quirks(ap);
535
536 if (ap->ops->pmp_attach)
537 ap->ops->pmp_attach(ap);
538
539 ata_for_each_link(tlink, ap, EDGE)
540 sata_link_init_spd(tlink);
541
542 return 0;
543
544 fail:
545 link->pmp = 0;
546 return rc;
547}
548
549
550
551
552
553
554
555
556
557
558
559static void sata_pmp_detach(struct ata_device *dev)
560{
561 struct ata_link *link = dev->link;
562 struct ata_port *ap = link->ap;
563 struct ata_link *tlink;
564 unsigned long flags;
565
566 ata_dev_info(dev, "Port Multiplier detaching\n");
567
568 WARN_ON(!ata_is_host_link(link) || dev->devno ||
569 link->pmp != SATA_PMP_CTRL_PORT);
570
571 if (ap->ops->pmp_detach)
572 ap->ops->pmp_detach(ap);
573
574 ata_for_each_link(tlink, ap, EDGE)
575 ata_eh_detach_dev(tlink->device);
576
577 spin_lock_irqsave(ap->lock, flags);
578 ap->nr_pmp_links = 0;
579 link->pmp = 0;
580 spin_unlock_irqrestore(ap->lock, flags);
581}
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr)
598{
599 const u32 *old_gscr = dev->gscr;
600 u16 old_vendor, new_vendor, old_devid, new_devid;
601 int old_nr_ports, new_nr_ports;
602
603 old_vendor = sata_pmp_gscr_vendor(old_gscr);
604 new_vendor = sata_pmp_gscr_vendor(new_gscr);
605 old_devid = sata_pmp_gscr_devid(old_gscr);
606 new_devid = sata_pmp_gscr_devid(new_gscr);
607 old_nr_ports = sata_pmp_gscr_ports(old_gscr);
608 new_nr_ports = sata_pmp_gscr_ports(new_gscr);
609
610 if (old_vendor != new_vendor) {
611 ata_dev_info(dev,
612 "Port Multiplier vendor mismatch '0x%x' != '0x%x'\n",
613 old_vendor, new_vendor);
614 return 0;
615 }
616
617 if (old_devid != new_devid) {
618 ata_dev_info(dev,
619 "Port Multiplier device ID mismatch '0x%x' != '0x%x'\n",
620 old_devid, new_devid);
621 return 0;
622 }
623
624 if (old_nr_ports != new_nr_ports) {
625 ata_dev_info(dev,
626 "Port Multiplier nr_ports mismatch '0x%x' != '0x%x'\n",
627 old_nr_ports, new_nr_ports);
628 return 0;
629 }
630
631 return 1;
632}
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class)
649{
650 struct ata_link *link = dev->link;
651 struct ata_port *ap = link->ap;
652 u32 *gscr = (void *)ap->sector_buf;
653 int rc;
654
655 DPRINTK("ENTER\n");
656
657 ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE);
658
659 if (!ata_dev_enabled(dev)) {
660 rc = -ENODEV;
661 goto fail;
662 }
663
664
665 if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) {
666 rc = -ENODEV;
667 goto fail;
668 }
669
670
671 rc = sata_pmp_read_gscr(dev, gscr);
672 if (rc)
673 goto fail;
674
675
676 if (!sata_pmp_same_pmp(dev, gscr)) {
677 rc = -ENODEV;
678 goto fail;
679 }
680
681 memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS);
682
683 rc = sata_pmp_configure(dev, 0);
684 if (rc)
685 goto fail;
686
687 ata_eh_done(link, NULL, ATA_EH_REVALIDATE);
688
689 DPRINTK("EXIT, rc=0\n");
690 return 0;
691
692 fail:
693 ata_dev_err(dev, "PMP revalidation failed (errno=%d)\n", rc);
694 DPRINTK("EXIT, rc=%d\n", rc);
695 return rc;
696}
697
698
699
700
701
702
703
704
705
706
707
708
709
710static int sata_pmp_revalidate_quick(struct ata_device *dev)
711{
712 unsigned int err_mask;
713 u32 prod_id;
714
715 err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
716 if (err_mask) {
717 ata_dev_err(dev,
718 "failed to read PMP product ID (Emask=0x%x)\n",
719 err_mask);
720 return -EIO;
721 }
722
723 if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) {
724 ata_dev_err(dev, "PMP product ID mismatch\n");
725
726 return -EIO;
727 }
728
729 return 0;
730}
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
752 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
753 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
754{
755 struct ata_link *link = &ap->link;
756 struct ata_eh_context *ehc = &link->eh_context;
757 struct ata_device *dev = link->device;
758 int tries = ATA_EH_PMP_TRIES;
759 int detach = 0, rc = 0;
760 int reval_failed = 0;
761
762 DPRINTK("ENTER\n");
763
764 if (dev->flags & ATA_DFLAG_DETACH) {
765 detach = 1;
766 goto fail;
767 }
768
769 retry:
770 ehc->classes[0] = ATA_DEV_UNKNOWN;
771
772 if (ehc->i.action & ATA_EH_RESET) {
773 struct ata_link *tlink;
774
775
776 rc = ata_eh_reset(link, 0, prereset, softreset, hardreset,
777 postreset);
778 if (rc) {
779 ata_link_err(link, "failed to reset PMP, giving up\n");
780 goto fail;
781 }
782
783
784 ata_for_each_link(tlink, ap, EDGE) {
785 struct ata_eh_context *ehc = &tlink->eh_context;
786
787 ehc->i.probe_mask |= ATA_ALL_DEVICES;
788 ehc->i.action |= ATA_EH_RESET;
789 }
790 }
791
792
793
794
795 if (ehc->i.action & ATA_EH_REVALIDATE)
796 rc = sata_pmp_revalidate(dev, ehc->classes[0]);
797 else
798 rc = sata_pmp_revalidate_quick(dev);
799
800 if (rc) {
801 tries--;
802
803 if (rc == -ENODEV) {
804 ehc->i.probe_mask |= ATA_ALL_DEVICES;
805 detach = 1;
806
807 tries = min(tries, 2);
808 }
809
810 if (tries) {
811
812 if (reval_failed)
813 sata_down_spd_limit(link, 0);
814 else
815 reval_failed = 1;
816
817 ehc->i.action |= ATA_EH_RESET;
818 goto retry;
819 } else {
820 ata_dev_err(dev,
821 "failed to recover PMP after %d tries, giving up\n",
822 ATA_EH_PMP_TRIES);
823 goto fail;
824 }
825 }
826
827
828 ehc->i.flags = 0;
829
830 DPRINTK("EXIT, rc=0\n");
831 return 0;
832
833 fail:
834 sata_pmp_detach(dev);
835 if (detach)
836 ata_eh_detach_dev(dev);
837 else
838 ata_dev_disable(dev);
839
840 DPRINTK("EXIT, rc=%d\n", rc);
841 return rc;
842}
843
844static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap)
845{
846 struct ata_link *link;
847 unsigned long flags;
848 int rc;
849
850 spin_lock_irqsave(ap->lock, flags);
851
852 ata_for_each_link(link, ap, EDGE) {
853 if (!(link->flags & ATA_LFLAG_DISABLED))
854 continue;
855
856 spin_unlock_irqrestore(ap->lock, flags);
857
858
859
860
861 sata_link_hardreset(link, sata_deb_timing_normal,
862 ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK),
863 NULL, NULL);
864
865
866 rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
867 if (rc) {
868 ata_link_err(link,
869 "failed to clear SError.N (errno=%d)\n",
870 rc);
871 return rc;
872 }
873
874 spin_lock_irqsave(ap->lock, flags);
875 }
876
877 spin_unlock_irqrestore(ap->lock, flags);
878
879 return 0;
880}
881
882static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries)
883{
884 struct ata_port *ap = link->ap;
885 unsigned long flags;
886
887 if (link_tries[link->pmp] && --link_tries[link->pmp])
888 return 1;
889
890
891 if (!(link->flags & ATA_LFLAG_DISABLED)) {
892 ata_link_warn(link,
893 "failed to recover link after %d tries, disabling\n",
894 ATA_EH_PMP_LINK_TRIES);
895
896 spin_lock_irqsave(ap->lock, flags);
897 link->flags |= ATA_LFLAG_DISABLED;
898 spin_unlock_irqrestore(ap->lock, flags);
899 }
900
901 ata_dev_disable(link->device);
902 link->eh_context.i.action = 0;
903
904 return 0;
905}
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922static int sata_pmp_eh_recover(struct ata_port *ap)
923{
924 struct ata_port_operations *ops = ap->ops;
925 int pmp_tries, link_tries[SATA_PMP_MAX_PORTS];
926 struct ata_link *pmp_link = &ap->link;
927 struct ata_device *pmp_dev = pmp_link->device;
928 struct ata_eh_context *pmp_ehc = &pmp_link->eh_context;
929 u32 *gscr = pmp_dev->gscr;
930 struct ata_link *link;
931 struct ata_device *dev;
932 unsigned int err_mask;
933 u32 gscr_error, sntf;
934 int cnt, rc;
935
936 pmp_tries = ATA_EH_PMP_TRIES;
937 ata_for_each_link(link, ap, EDGE)
938 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
939
940 retry:
941
942 if (!sata_pmp_attached(ap)) {
943 rc = ata_eh_recover(ap, ops->prereset, ops->softreset,
944 ops->hardreset, ops->postreset, NULL);
945 if (rc) {
946 ata_for_each_dev(dev, &ap->link, ALL)
947 ata_dev_disable(dev);
948 return rc;
949 }
950
951 if (pmp_dev->class != ATA_DEV_PMP)
952 return 0;
953
954
955 ata_for_each_link(link, ap, EDGE)
956 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
957
958
959 }
960
961
962 rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset,
963 ops->hardreset, ops->postreset);
964 if (rc)
965 goto pmp_fail;
966
967
968
969
970 if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) {
971 gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY;
972
973 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
974 gscr[SATA_PMP_GSCR_FEAT_EN]);
975 if (err_mask) {
976 ata_link_warn(pmp_link,
977 "failed to disable NOTIFY (err_mask=0x%x)\n",
978 err_mask);
979 goto pmp_fail;
980 }
981 }
982
983
984 rc = sata_pmp_eh_handle_disabled_links(ap);
985 if (rc)
986 goto pmp_fail;
987
988
989 rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset,
990 ops->pmp_hardreset, ops->pmp_postreset, &link);
991 if (rc)
992 goto link_fail;
993
994
995 rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
996 if (rc == 0)
997 sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
998
999
1000
1001
1002
1003 ata_for_each_link(link, ap, EDGE)
1004 if (link->lpm_policy > ATA_LPM_MAX_POWER)
1005 return 0;
1006
1007
1008
1009
1010
1011
1012
1013
1014 if (pmp_dev->flags & ATA_DFLAG_AN) {
1015 gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
1016
1017 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
1018 gscr[SATA_PMP_GSCR_FEAT_EN]);
1019 if (err_mask) {
1020 ata_dev_err(pmp_dev,
1021 "failed to write PMP_FEAT_EN (Emask=0x%x)\n",
1022 err_mask);
1023 rc = -EIO;
1024 goto pmp_fail;
1025 }
1026 }
1027
1028
1029 err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error);
1030 if (err_mask) {
1031 ata_dev_err(pmp_dev,
1032 "failed to read PMP_GSCR_ERROR (Emask=0x%x)\n",
1033 err_mask);
1034 rc = -EIO;
1035 goto pmp_fail;
1036 }
1037
1038 cnt = 0;
1039 ata_for_each_link(link, ap, EDGE) {
1040 if (!(gscr_error & (1 << link->pmp)))
1041 continue;
1042
1043 if (sata_pmp_handle_link_fail(link, link_tries)) {
1044 ata_ehi_hotplugged(&link->eh_context.i);
1045 cnt++;
1046 } else {
1047 ata_link_warn(link,
1048 "PHY status changed but maxed out on retries, giving up\n");
1049 ata_link_warn(link,
1050 "Manually issue scan to resume this link\n");
1051 }
1052 }
1053
1054 if (cnt) {
1055 ata_port_info(ap,
1056 "PMP SError.N set for some ports, repeating recovery\n");
1057 goto retry;
1058 }
1059
1060 return 0;
1061
1062 link_fail:
1063 if (sata_pmp_handle_link_fail(link, link_tries)) {
1064 pmp_ehc->i.action |= ATA_EH_RESET;
1065 goto retry;
1066 }
1067
1068
1069 pmp_fail:
1070
1071
1072
1073 if (ap->pflags & ATA_PFLAG_UNLOADING)
1074 return rc;
1075
1076 if (!sata_pmp_attached(ap))
1077 goto retry;
1078
1079 if (--pmp_tries) {
1080 pmp_ehc->i.action |= ATA_EH_RESET;
1081 goto retry;
1082 }
1083
1084 ata_port_err(ap, "failed to recover PMP after %d tries, giving up\n",
1085 ATA_EH_PMP_TRIES);
1086 sata_pmp_detach(pmp_dev);
1087 ata_dev_disable(pmp_dev);
1088
1089 return rc;
1090}
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102void sata_pmp_error_handler(struct ata_port *ap)
1103{
1104 ata_eh_autopsy(ap);
1105 ata_eh_report(ap);
1106 sata_pmp_eh_recover(ap);
1107 ata_eh_finish(ap);
1108}
1109
1110EXPORT_SYMBOL_GPL(sata_pmp_port_ops);
1111EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
1112EXPORT_SYMBOL_GPL(sata_pmp_error_handler);
1113