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10#include <linux/kernel.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
25
26
27
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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_printk(link, KERN_WARNING, "failed to read SCR %d "
151 "(Emask=0x%x)\n", 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_printk(link, KERN_WARNING, "failed to write SCR %d "
182 "(Emask=0x%x)\n", reg, err_mask);
183 return -EIO;
184 }
185 return 0;
186}
187
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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}
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209
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218
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220
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_printk(dev, KERN_ERR, "failed to read PMP "
235 "GSCR[%d] (Emask=0x%x)\n", 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) {
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 Sil3726 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 Sil3726 Private Register";
309 goto fail;
310 }
311 }
312
313 if (print_info) {
314 ata_dev_printk(dev, KERN_INFO, "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_printk(dev, KERN_INFO,
323 "Asynchronous notification not supported, "
324 "hotplug won't\n work on fan-out "
325 "ports. Use warm-plug instead.\n");
326 }
327
328 return 0;
329
330 fail:
331 ata_dev_printk(dev, KERN_ERR,
332 "failed to configure Port Multiplier (%s, Emask=0x%x)\n",
333 reason, err_mask);
334 return rc;
335}
336
337static int sata_pmp_init_links (struct ata_port *ap, int nr_ports)
338{
339 struct ata_link *pmp_link = ap->pmp_link;
340 int i, err;
341
342 if (!pmp_link) {
343 pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS,
344 GFP_NOIO);
345 if (!pmp_link)
346 return -ENOMEM;
347
348 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
349 ata_link_init(ap, &pmp_link[i], i);
350
351 ap->pmp_link = pmp_link;
352
353 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
354 err = ata_tlink_add(&pmp_link[i]);
355 if (err) {
356 goto err_tlink;
357 }
358 }
359 }
360
361 for (i = 0; i < nr_ports; i++) {
362 struct ata_link *link = &pmp_link[i];
363 struct ata_eh_context *ehc = &link->eh_context;
364
365 link->flags = 0;
366 ehc->i.probe_mask |= ATA_ALL_DEVICES;
367 ehc->i.action |= ATA_EH_RESET;
368 }
369
370 return 0;
371 err_tlink:
372 while (--i >= 0)
373 ata_tlink_delete(&pmp_link[i]);
374 kfree(pmp_link);
375 ap->pmp_link = NULL;
376 return err;
377}
378
379static void sata_pmp_quirks(struct ata_port *ap)
380{
381 u32 *gscr = ap->link.device->gscr;
382 u16 vendor = sata_pmp_gscr_vendor(gscr);
383 u16 devid = sata_pmp_gscr_devid(gscr);
384 struct ata_link *link;
385
386 if (vendor == 0x1095 && devid == 0x3726) {
387
388 ata_for_each_link(link, ap, EDGE) {
389
390 link->flags |= ATA_LFLAG_NO_LPM;
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 ata_for_each_link(link, ap, EDGE) {
407
408 link->flags |= ATA_LFLAG_NO_LPM;
409
410
411 if (link->pmp < 2)
412 link->flags |= ATA_LFLAG_ASSUME_ATA;
413
414
415 if (link->pmp == 2)
416 link->flags |= ATA_LFLAG_NO_SRST |
417 ATA_LFLAG_ASSUME_ATA;
418 }
419 } else if (vendor == 0x1095 && devid == 0x4726) {
420
421 ata_for_each_link(link, ap, EDGE) {
422
423 link->flags |= ATA_LFLAG_NO_LPM;
424
425
426
427
428
429
430 if (link->pmp <= 5)
431 link->flags |= ATA_LFLAG_NO_SRST |
432 ATA_LFLAG_ASSUME_ATA;
433
434
435
436
437 if (link->pmp == 6)
438 link->flags |= ATA_LFLAG_NO_SRST |
439 ATA_LFLAG_ASSUME_SEMB;
440 }
441 } else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 ||
442 devid == 0x5734 || devid == 0x5744)) {
443
444
445
446
447
448
449
450
451 ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
452 }
453}
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468int sata_pmp_attach(struct ata_device *dev)
469{
470 struct ata_link *link = dev->link;
471 struct ata_port *ap = link->ap;
472 unsigned long flags;
473 struct ata_link *tlink;
474 int rc;
475
476
477 if (!sata_pmp_supported(ap)) {
478 ata_dev_printk(dev, KERN_ERR,
479 "host does not support Port Multiplier\n");
480 return -EINVAL;
481 }
482
483 if (!ata_is_host_link(link)) {
484 ata_dev_printk(dev, KERN_ERR,
485 "Port Multipliers cannot be nested\n");
486 return -EINVAL;
487 }
488
489 if (dev->devno) {
490 ata_dev_printk(dev, KERN_ERR,
491 "Port Multiplier must be the first device\n");
492 return -EINVAL;
493 }
494
495 WARN_ON(link->pmp != 0);
496 link->pmp = SATA_PMP_CTRL_PORT;
497
498
499 rc = sata_pmp_read_gscr(dev, dev->gscr);
500 if (rc)
501 goto fail;
502
503
504 rc = sata_pmp_configure(dev, 1);
505 if (rc)
506 goto fail;
507
508 rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr));
509 if (rc) {
510 ata_dev_printk(dev, KERN_INFO,
511 "failed to initialize PMP links\n");
512 goto fail;
513 }
514
515
516 spin_lock_irqsave(ap->lock, flags);
517 WARN_ON(ap->nr_pmp_links);
518 ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr);
519 spin_unlock_irqrestore(ap->lock, flags);
520
521 sata_pmp_quirks(ap);
522
523 if (ap->ops->pmp_attach)
524 ap->ops->pmp_attach(ap);
525
526 ata_for_each_link(tlink, ap, EDGE)
527 sata_link_init_spd(tlink);
528
529 ata_acpi_associate_sata_port(ap);
530
531 return 0;
532
533 fail:
534 link->pmp = 0;
535 return rc;
536}
537
538
539
540
541
542
543
544
545
546
547
548static void sata_pmp_detach(struct ata_device *dev)
549{
550 struct ata_link *link = dev->link;
551 struct ata_port *ap = link->ap;
552 struct ata_link *tlink;
553 unsigned long flags;
554
555 ata_dev_printk(dev, KERN_INFO, "Port Multiplier detaching\n");
556
557 WARN_ON(!ata_is_host_link(link) || dev->devno ||
558 link->pmp != SATA_PMP_CTRL_PORT);
559
560 if (ap->ops->pmp_detach)
561 ap->ops->pmp_detach(ap);
562
563 ata_for_each_link(tlink, ap, EDGE)
564 ata_eh_detach_dev(tlink->device);
565
566 spin_lock_irqsave(ap->lock, flags);
567 ap->nr_pmp_links = 0;
568 link->pmp = 0;
569 spin_unlock_irqrestore(ap->lock, flags);
570
571 ata_acpi_associate_sata_port(ap);
572}
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr)
589{
590 const u32 *old_gscr = dev->gscr;
591 u16 old_vendor, new_vendor, old_devid, new_devid;
592 int old_nr_ports, new_nr_ports;
593
594 old_vendor = sata_pmp_gscr_vendor(old_gscr);
595 new_vendor = sata_pmp_gscr_vendor(new_gscr);
596 old_devid = sata_pmp_gscr_devid(old_gscr);
597 new_devid = sata_pmp_gscr_devid(new_gscr);
598 old_nr_ports = sata_pmp_gscr_ports(old_gscr);
599 new_nr_ports = sata_pmp_gscr_ports(new_gscr);
600
601 if (old_vendor != new_vendor) {
602 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
603 "vendor mismatch '0x%x' != '0x%x'\n",
604 old_vendor, new_vendor);
605 return 0;
606 }
607
608 if (old_devid != new_devid) {
609 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
610 "device ID mismatch '0x%x' != '0x%x'\n",
611 old_devid, new_devid);
612 return 0;
613 }
614
615 if (old_nr_ports != new_nr_ports) {
616 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
617 "nr_ports mismatch '0x%x' != '0x%x'\n",
618 old_nr_ports, new_nr_ports);
619 return 0;
620 }
621
622 return 1;
623}
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class)
640{
641 struct ata_link *link = dev->link;
642 struct ata_port *ap = link->ap;
643 u32 *gscr = (void *)ap->sector_buf;
644 int rc;
645
646 DPRINTK("ENTER\n");
647
648 ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE);
649
650 if (!ata_dev_enabled(dev)) {
651 rc = -ENODEV;
652 goto fail;
653 }
654
655
656 if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) {
657 rc = -ENODEV;
658 goto fail;
659 }
660
661
662 rc = sata_pmp_read_gscr(dev, gscr);
663 if (rc)
664 goto fail;
665
666
667 if (!sata_pmp_same_pmp(dev, gscr)) {
668 rc = -ENODEV;
669 goto fail;
670 }
671
672 memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS);
673
674 rc = sata_pmp_configure(dev, 0);
675 if (rc)
676 goto fail;
677
678 ata_eh_done(link, NULL, ATA_EH_REVALIDATE);
679
680 DPRINTK("EXIT, rc=0\n");
681 return 0;
682
683 fail:
684 ata_dev_printk(dev, KERN_ERR,
685 "PMP revalidation failed (errno=%d)\n", rc);
686 DPRINTK("EXIT, rc=%d\n", rc);
687 return rc;
688}
689
690
691
692
693
694
695
696
697
698
699
700
701
702static int sata_pmp_revalidate_quick(struct ata_device *dev)
703{
704 unsigned int err_mask;
705 u32 prod_id;
706
707 err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
708 if (err_mask) {
709 ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID "
710 "(Emask=0x%x)\n", err_mask);
711 return -EIO;
712 }
713
714 if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) {
715 ata_dev_printk(dev, KERN_ERR, "PMP product ID mismatch\n");
716
717 return -EIO;
718 }
719
720 return 0;
721}
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
743 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
744 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
745{
746 struct ata_link *link = &ap->link;
747 struct ata_eh_context *ehc = &link->eh_context;
748 struct ata_device *dev = link->device;
749 int tries = ATA_EH_PMP_TRIES;
750 int detach = 0, rc = 0;
751 int reval_failed = 0;
752
753 DPRINTK("ENTER\n");
754
755 if (dev->flags & ATA_DFLAG_DETACH) {
756 detach = 1;
757 goto fail;
758 }
759
760 retry:
761 ehc->classes[0] = ATA_DEV_UNKNOWN;
762
763 if (ehc->i.action & ATA_EH_RESET) {
764 struct ata_link *tlink;
765
766
767 rc = ata_eh_reset(link, 0, prereset, softreset, hardreset,
768 postreset);
769 if (rc) {
770 ata_link_printk(link, KERN_ERR,
771 "failed to reset PMP, giving up\n");
772 goto fail;
773 }
774
775
776 ata_for_each_link(tlink, ap, EDGE) {
777 struct ata_eh_context *ehc = &tlink->eh_context;
778
779 ehc->i.probe_mask |= ATA_ALL_DEVICES;
780 ehc->i.action |= ATA_EH_RESET;
781 }
782 }
783
784
785
786
787 if (ehc->i.action & ATA_EH_REVALIDATE)
788 rc = sata_pmp_revalidate(dev, ehc->classes[0]);
789 else
790 rc = sata_pmp_revalidate_quick(dev);
791
792 if (rc) {
793 tries--;
794
795 if (rc == -ENODEV) {
796 ehc->i.probe_mask |= ATA_ALL_DEVICES;
797 detach = 1;
798
799 tries = min(tries, 2);
800 }
801
802 if (tries) {
803
804 if (reval_failed)
805 sata_down_spd_limit(link, 0);
806 else
807 reval_failed = 1;
808
809 ehc->i.action |= ATA_EH_RESET;
810 goto retry;
811 } else {
812 ata_dev_printk(dev, KERN_ERR, "failed to recover PMP "
813 "after %d tries, giving up\n",
814 ATA_EH_PMP_TRIES);
815 goto fail;
816 }
817 }
818
819
820 ehc->i.flags = 0;
821
822 DPRINTK("EXIT, rc=0\n");
823 return 0;
824
825 fail:
826 sata_pmp_detach(dev);
827 if (detach)
828 ata_eh_detach_dev(dev);
829 else
830 ata_dev_disable(dev);
831
832 DPRINTK("EXIT, rc=%d\n", rc);
833 return rc;
834}
835
836static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap)
837{
838 struct ata_link *link;
839 unsigned long flags;
840 int rc;
841
842 spin_lock_irqsave(ap->lock, flags);
843
844 ata_for_each_link(link, ap, EDGE) {
845 if (!(link->flags & ATA_LFLAG_DISABLED))
846 continue;
847
848 spin_unlock_irqrestore(ap->lock, flags);
849
850
851
852
853 sata_link_hardreset(link, sata_deb_timing_normal,
854 ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK),
855 NULL, NULL);
856
857
858 rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
859 if (rc) {
860 ata_link_printk(link, KERN_ERR, "failed to clear "
861 "SError.N (errno=%d)\n", rc);
862 return rc;
863 }
864
865 spin_lock_irqsave(ap->lock, flags);
866 }
867
868 spin_unlock_irqrestore(ap->lock, flags);
869
870 return 0;
871}
872
873static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries)
874{
875 struct ata_port *ap = link->ap;
876 unsigned long flags;
877
878 if (link_tries[link->pmp] && --link_tries[link->pmp])
879 return 1;
880
881
882 if (!(link->flags & ATA_LFLAG_DISABLED)) {
883 ata_link_printk(link, KERN_WARNING,
884 "failed to recover link after %d tries, disabling\n",
885 ATA_EH_PMP_LINK_TRIES);
886
887 spin_lock_irqsave(ap->lock, flags);
888 link->flags |= ATA_LFLAG_DISABLED;
889 spin_unlock_irqrestore(ap->lock, flags);
890 }
891
892 ata_dev_disable(link->device);
893 link->eh_context.i.action = 0;
894
895 return 0;
896}
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913static int sata_pmp_eh_recover(struct ata_port *ap)
914{
915 struct ata_port_operations *ops = ap->ops;
916 int pmp_tries, link_tries[SATA_PMP_MAX_PORTS];
917 struct ata_link *pmp_link = &ap->link;
918 struct ata_device *pmp_dev = pmp_link->device;
919 struct ata_eh_context *pmp_ehc = &pmp_link->eh_context;
920 u32 *gscr = pmp_dev->gscr;
921 struct ata_link *link;
922 struct ata_device *dev;
923 unsigned int err_mask;
924 u32 gscr_error, sntf;
925 int cnt, rc;
926
927 pmp_tries = ATA_EH_PMP_TRIES;
928 ata_for_each_link(link, ap, EDGE)
929 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
930
931 retry:
932
933 if (!sata_pmp_attached(ap)) {
934 rc = ata_eh_recover(ap, ops->prereset, ops->softreset,
935 ops->hardreset, ops->postreset, NULL);
936 if (rc) {
937 ata_for_each_dev(dev, &ap->link, ALL)
938 ata_dev_disable(dev);
939 return rc;
940 }
941
942 if (pmp_dev->class != ATA_DEV_PMP)
943 return 0;
944
945
946 ata_for_each_link(link, ap, EDGE)
947 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
948
949
950 }
951
952
953 rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset,
954 ops->hardreset, ops->postreset);
955 if (rc)
956 goto pmp_fail;
957
958
959
960
961 if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) {
962 gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY;
963
964 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
965 gscr[SATA_PMP_GSCR_FEAT_EN]);
966 if (err_mask) {
967 ata_link_printk(pmp_link, KERN_WARNING,
968 "failed to disable NOTIFY (err_mask=0x%x)\n",
969 err_mask);
970 goto pmp_fail;
971 }
972 }
973
974
975 rc = sata_pmp_eh_handle_disabled_links(ap);
976 if (rc)
977 goto pmp_fail;
978
979
980 rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset,
981 ops->pmp_hardreset, ops->pmp_postreset, &link);
982 if (rc)
983 goto link_fail;
984
985
986 rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
987 if (rc == 0)
988 sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
989
990
991
992
993
994 ata_for_each_link(link, ap, EDGE)
995 if (link->lpm_policy > ATA_LPM_MAX_POWER)
996 return 0;
997
998
999
1000
1001
1002
1003
1004
1005 if (pmp_dev->flags & ATA_DFLAG_AN) {
1006 gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
1007
1008 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
1009 gscr[SATA_PMP_GSCR_FEAT_EN]);
1010 if (err_mask) {
1011 ata_dev_printk(pmp_dev, KERN_ERR, "failed to write "
1012 "PMP_FEAT_EN (Emask=0x%x)\n", err_mask);
1013 rc = -EIO;
1014 goto pmp_fail;
1015 }
1016 }
1017
1018
1019 err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error);
1020 if (err_mask) {
1021 ata_dev_printk(pmp_dev, KERN_ERR, "failed to read "
1022 "PMP_GSCR_ERROR (Emask=0x%x)\n", err_mask);
1023 rc = -EIO;
1024 goto pmp_fail;
1025 }
1026
1027 cnt = 0;
1028 ata_for_each_link(link, ap, EDGE) {
1029 if (!(gscr_error & (1 << link->pmp)))
1030 continue;
1031
1032 if (sata_pmp_handle_link_fail(link, link_tries)) {
1033 ata_ehi_hotplugged(&link->eh_context.i);
1034 cnt++;
1035 } else {
1036 ata_link_printk(link, KERN_WARNING,
1037 "PHY status changed but maxed out on retries, "
1038 "giving up\n");
1039 ata_link_printk(link, KERN_WARNING,
1040 "Manully issue scan to resume this link\n");
1041 }
1042 }
1043
1044 if (cnt) {
1045 ata_port_printk(ap, KERN_INFO, "PMP SError.N set for some "
1046 "ports, repeating recovery\n");
1047 goto retry;
1048 }
1049
1050 return 0;
1051
1052 link_fail:
1053 if (sata_pmp_handle_link_fail(link, link_tries)) {
1054 pmp_ehc->i.action |= ATA_EH_RESET;
1055 goto retry;
1056 }
1057
1058
1059 pmp_fail:
1060
1061
1062
1063 if (ap->pflags & ATA_PFLAG_UNLOADING)
1064 return rc;
1065
1066 if (!sata_pmp_attached(ap))
1067 goto retry;
1068
1069 if (--pmp_tries) {
1070 pmp_ehc->i.action |= ATA_EH_RESET;
1071 goto retry;
1072 }
1073
1074 ata_port_printk(ap, KERN_ERR,
1075 "failed to recover PMP after %d tries, giving up\n",
1076 ATA_EH_PMP_TRIES);
1077 sata_pmp_detach(pmp_dev);
1078 ata_dev_disable(pmp_dev);
1079
1080 return rc;
1081}
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093void sata_pmp_error_handler(struct ata_port *ap)
1094{
1095 ata_eh_autopsy(ap);
1096 ata_eh_report(ap);
1097 sata_pmp_eh_recover(ap);
1098 ata_eh_finish(ap);
1099}
1100
1101EXPORT_SYMBOL_GPL(sata_pmp_port_ops);
1102EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
1103EXPORT_SYMBOL_GPL(sata_pmp_error_handler);
1104