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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
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32
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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
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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
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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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197
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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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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 } else if (vendor == 0x197b && devid == 0x2352) {
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 }
463}
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478int sata_pmp_attach(struct ata_device *dev)
479{
480 struct ata_link *link = dev->link;
481 struct ata_port *ap = link->ap;
482 unsigned long flags;
483 struct ata_link *tlink;
484 int rc;
485
486
487 if (!sata_pmp_supported(ap)) {
488 ata_dev_printk(dev, KERN_ERR,
489 "host does not support Port Multiplier\n");
490 return -EINVAL;
491 }
492
493 if (!ata_is_host_link(link)) {
494 ata_dev_printk(dev, KERN_ERR,
495 "Port Multipliers cannot be nested\n");
496 return -EINVAL;
497 }
498
499 if (dev->devno) {
500 ata_dev_printk(dev, KERN_ERR,
501 "Port Multiplier must be the first device\n");
502 return -EINVAL;
503 }
504
505 WARN_ON(link->pmp != 0);
506 link->pmp = SATA_PMP_CTRL_PORT;
507
508
509 rc = sata_pmp_read_gscr(dev, dev->gscr);
510 if (rc)
511 goto fail;
512
513
514 rc = sata_pmp_configure(dev, 1);
515 if (rc)
516 goto fail;
517
518 rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr));
519 if (rc) {
520 ata_dev_printk(dev, KERN_INFO,
521 "failed to initialize PMP links\n");
522 goto fail;
523 }
524
525
526 spin_lock_irqsave(ap->lock, flags);
527 WARN_ON(ap->nr_pmp_links);
528 ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr);
529 spin_unlock_irqrestore(ap->lock, flags);
530
531 sata_pmp_quirks(ap);
532
533 if (ap->ops->pmp_attach)
534 ap->ops->pmp_attach(ap);
535
536 ata_for_each_link(tlink, ap, EDGE)
537 sata_link_init_spd(tlink);
538
539 ata_acpi_associate_sata_port(ap);
540
541 return 0;
542
543 fail:
544 link->pmp = 0;
545 return rc;
546}
547
548
549
550
551
552
553
554
555
556
557
558static void sata_pmp_detach(struct ata_device *dev)
559{
560 struct ata_link *link = dev->link;
561 struct ata_port *ap = link->ap;
562 struct ata_link *tlink;
563 unsigned long flags;
564
565 ata_dev_printk(dev, KERN_INFO, "Port Multiplier detaching\n");
566
567 WARN_ON(!ata_is_host_link(link) || dev->devno ||
568 link->pmp != SATA_PMP_CTRL_PORT);
569
570 if (ap->ops->pmp_detach)
571 ap->ops->pmp_detach(ap);
572
573 ata_for_each_link(tlink, ap, EDGE)
574 ata_eh_detach_dev(tlink->device);
575
576 spin_lock_irqsave(ap->lock, flags);
577 ap->nr_pmp_links = 0;
578 link->pmp = 0;
579 spin_unlock_irqrestore(ap->lock, flags);
580
581 ata_acpi_associate_sata_port(ap);
582}
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr)
599{
600 const u32 *old_gscr = dev->gscr;
601 u16 old_vendor, new_vendor, old_devid, new_devid;
602 int old_nr_ports, new_nr_ports;
603
604 old_vendor = sata_pmp_gscr_vendor(old_gscr);
605 new_vendor = sata_pmp_gscr_vendor(new_gscr);
606 old_devid = sata_pmp_gscr_devid(old_gscr);
607 new_devid = sata_pmp_gscr_devid(new_gscr);
608 old_nr_ports = sata_pmp_gscr_ports(old_gscr);
609 new_nr_ports = sata_pmp_gscr_ports(new_gscr);
610
611 if (old_vendor != new_vendor) {
612 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
613 "vendor mismatch '0x%x' != '0x%x'\n",
614 old_vendor, new_vendor);
615 return 0;
616 }
617
618 if (old_devid != new_devid) {
619 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
620 "device ID mismatch '0x%x' != '0x%x'\n",
621 old_devid, new_devid);
622 return 0;
623 }
624
625 if (old_nr_ports != new_nr_ports) {
626 ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
627 "nr_ports mismatch '0x%x' != '0x%x'\n",
628 old_nr_ports, new_nr_ports);
629 return 0;
630 }
631
632 return 1;
633}
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class)
650{
651 struct ata_link *link = dev->link;
652 struct ata_port *ap = link->ap;
653 u32 *gscr = (void *)ap->sector_buf;
654 int rc;
655
656 DPRINTK("ENTER\n");
657
658 ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE);
659
660 if (!ata_dev_enabled(dev)) {
661 rc = -ENODEV;
662 goto fail;
663 }
664
665
666 if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) {
667 rc = -ENODEV;
668 goto fail;
669 }
670
671
672 rc = sata_pmp_read_gscr(dev, gscr);
673 if (rc)
674 goto fail;
675
676
677 if (!sata_pmp_same_pmp(dev, gscr)) {
678 rc = -ENODEV;
679 goto fail;
680 }
681
682 memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS);
683
684 rc = sata_pmp_configure(dev, 0);
685 if (rc)
686 goto fail;
687
688 ata_eh_done(link, NULL, ATA_EH_REVALIDATE);
689
690 DPRINTK("EXIT, rc=0\n");
691 return 0;
692
693 fail:
694 ata_dev_printk(dev, KERN_ERR,
695 "PMP revalidation failed (errno=%d)\n", rc);
696 DPRINTK("EXIT, rc=%d\n", rc);
697 return rc;
698}
699
700
701
702
703
704
705
706
707
708
709
710
711
712static int sata_pmp_revalidate_quick(struct ata_device *dev)
713{
714 unsigned int err_mask;
715 u32 prod_id;
716
717 err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
718 if (err_mask) {
719 ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID "
720 "(Emask=0x%x)\n", err_mask);
721 return -EIO;
722 }
723
724 if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) {
725 ata_dev_printk(dev, KERN_ERR, "PMP product ID mismatch\n");
726
727 return -EIO;
728 }
729
730 return 0;
731}
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
753 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
754 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
755{
756 struct ata_link *link = &ap->link;
757 struct ata_eh_context *ehc = &link->eh_context;
758 struct ata_device *dev = link->device;
759 int tries = ATA_EH_PMP_TRIES;
760 int detach = 0, rc = 0;
761 int reval_failed = 0;
762
763 DPRINTK("ENTER\n");
764
765 if (dev->flags & ATA_DFLAG_DETACH) {
766 detach = 1;
767 goto fail;
768 }
769
770 retry:
771 ehc->classes[0] = ATA_DEV_UNKNOWN;
772
773 if (ehc->i.action & ATA_EH_RESET) {
774 struct ata_link *tlink;
775
776
777 rc = ata_eh_reset(link, 0, prereset, softreset, hardreset,
778 postreset);
779 if (rc) {
780 ata_link_printk(link, KERN_ERR,
781 "failed to reset PMP, giving up\n");
782 goto fail;
783 }
784
785
786 ata_for_each_link(tlink, ap, EDGE) {
787 struct ata_eh_context *ehc = &tlink->eh_context;
788
789 ehc->i.probe_mask |= ATA_ALL_DEVICES;
790 ehc->i.action |= ATA_EH_RESET;
791 }
792 }
793
794
795
796
797 if (ehc->i.action & ATA_EH_REVALIDATE)
798 rc = sata_pmp_revalidate(dev, ehc->classes[0]);
799 else
800 rc = sata_pmp_revalidate_quick(dev);
801
802 if (rc) {
803 tries--;
804
805 if (rc == -ENODEV) {
806 ehc->i.probe_mask |= ATA_ALL_DEVICES;
807 detach = 1;
808
809 tries = min(tries, 2);
810 }
811
812 if (tries) {
813
814 if (reval_failed)
815 sata_down_spd_limit(link, 0);
816 else
817 reval_failed = 1;
818
819 ehc->i.action |= ATA_EH_RESET;
820 goto retry;
821 } else {
822 ata_dev_printk(dev, KERN_ERR, "failed to recover PMP "
823 "after %d tries, giving up\n",
824 ATA_EH_PMP_TRIES);
825 goto fail;
826 }
827 }
828
829
830 ehc->i.flags = 0;
831
832 DPRINTK("EXIT, rc=0\n");
833 return 0;
834
835 fail:
836 sata_pmp_detach(dev);
837 if (detach)
838 ata_eh_detach_dev(dev);
839 else
840 ata_dev_disable(dev);
841
842 DPRINTK("EXIT, rc=%d\n", rc);
843 return rc;
844}
845
846static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap)
847{
848 struct ata_link *link;
849 unsigned long flags;
850 int rc;
851
852 spin_lock_irqsave(ap->lock, flags);
853
854 ata_for_each_link(link, ap, EDGE) {
855 if (!(link->flags & ATA_LFLAG_DISABLED))
856 continue;
857
858 spin_unlock_irqrestore(ap->lock, flags);
859
860
861
862
863 sata_link_hardreset(link, sata_deb_timing_normal,
864 ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK),
865 NULL, NULL);
866
867
868 rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
869 if (rc) {
870 ata_link_printk(link, KERN_ERR, "failed to clear "
871 "SError.N (errno=%d)\n", rc);
872 return rc;
873 }
874
875 spin_lock_irqsave(ap->lock, flags);
876 }
877
878 spin_unlock_irqrestore(ap->lock, flags);
879
880 return 0;
881}
882
883static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries)
884{
885 struct ata_port *ap = link->ap;
886 unsigned long flags;
887
888 if (link_tries[link->pmp] && --link_tries[link->pmp])
889 return 1;
890
891
892 if (!(link->flags & ATA_LFLAG_DISABLED)) {
893 ata_link_printk(link, KERN_WARNING,
894 "failed to recover link after %d tries, disabling\n",
895 ATA_EH_PMP_LINK_TRIES);
896
897 spin_lock_irqsave(ap->lock, flags);
898 link->flags |= ATA_LFLAG_DISABLED;
899 spin_unlock_irqrestore(ap->lock, flags);
900 }
901
902 ata_dev_disable(link->device);
903 link->eh_context.i.action = 0;
904
905 return 0;
906}
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923static int sata_pmp_eh_recover(struct ata_port *ap)
924{
925 struct ata_port_operations *ops = ap->ops;
926 int pmp_tries, link_tries[SATA_PMP_MAX_PORTS];
927 struct ata_link *pmp_link = &ap->link;
928 struct ata_device *pmp_dev = pmp_link->device;
929 struct ata_eh_context *pmp_ehc = &pmp_link->eh_context;
930 u32 *gscr = pmp_dev->gscr;
931 struct ata_link *link;
932 struct ata_device *dev;
933 unsigned int err_mask;
934 u32 gscr_error, sntf;
935 int cnt, rc;
936
937 pmp_tries = ATA_EH_PMP_TRIES;
938 ata_for_each_link(link, ap, EDGE)
939 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
940
941 retry:
942
943 if (!sata_pmp_attached(ap)) {
944 rc = ata_eh_recover(ap, ops->prereset, ops->softreset,
945 ops->hardreset, ops->postreset, NULL);
946 if (rc) {
947 ata_for_each_dev(dev, &ap->link, ALL)
948 ata_dev_disable(dev);
949 return rc;
950 }
951
952 if (pmp_dev->class != ATA_DEV_PMP)
953 return 0;
954
955
956 ata_for_each_link(link, ap, EDGE)
957 link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
958
959
960 }
961
962
963 rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset,
964 ops->hardreset, ops->postreset);
965 if (rc)
966 goto pmp_fail;
967
968
969
970
971 if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) {
972 gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY;
973
974 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
975 gscr[SATA_PMP_GSCR_FEAT_EN]);
976 if (err_mask) {
977 ata_link_printk(pmp_link, KERN_WARNING,
978 "failed to disable NOTIFY (err_mask=0x%x)\n",
979 err_mask);
980 goto pmp_fail;
981 }
982 }
983
984
985 rc = sata_pmp_eh_handle_disabled_links(ap);
986 if (rc)
987 goto pmp_fail;
988
989
990 rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset,
991 ops->pmp_hardreset, ops->pmp_postreset, &link);
992 if (rc)
993 goto link_fail;
994
995
996 rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
997 if (rc == 0)
998 sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
999
1000
1001
1002
1003
1004 ata_for_each_link(link, ap, EDGE)
1005 if (link->lpm_policy > ATA_LPM_MAX_POWER)
1006 return 0;
1007
1008
1009
1010
1011
1012
1013
1014
1015 if (pmp_dev->flags & ATA_DFLAG_AN) {
1016 gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
1017
1018 err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN,
1019 gscr[SATA_PMP_GSCR_FEAT_EN]);
1020 if (err_mask) {
1021 ata_dev_printk(pmp_dev, KERN_ERR, "failed to write "
1022 "PMP_FEAT_EN (Emask=0x%x)\n", 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_printk(pmp_dev, KERN_ERR, "failed to read "
1032 "PMP_GSCR_ERROR (Emask=0x%x)\n", err_mask);
1033 rc = -EIO;
1034 goto pmp_fail;
1035 }
1036
1037 cnt = 0;
1038 ata_for_each_link(link, ap, EDGE) {
1039 if (!(gscr_error & (1 << link->pmp)))
1040 continue;
1041
1042 if (sata_pmp_handle_link_fail(link, link_tries)) {
1043 ata_ehi_hotplugged(&link->eh_context.i);
1044 cnt++;
1045 } else {
1046 ata_link_printk(link, KERN_WARNING,
1047 "PHY status changed but maxed out on retries, "
1048 "giving up\n");
1049 ata_link_printk(link, KERN_WARNING,
1050 "Manully issue scan to resume this link\n");
1051 }
1052 }
1053
1054 if (cnt) {
1055 ata_port_printk(ap, KERN_INFO, "PMP SError.N set for some "
1056 "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_printk(ap, KERN_ERR,
1085 "failed to recover PMP after %d tries, giving up\n",
1086 ATA_EH_PMP_TRIES);
1087 sata_pmp_detach(pmp_dev);
1088 ata_dev_disable(pmp_dev);
1089
1090 return rc;
1091}
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103void sata_pmp_error_handler(struct ata_port *ap)
1104{
1105 ata_eh_autopsy(ap);
1106 ata_eh_report(ap);
1107 sata_pmp_eh_recover(ap);
1108 ata_eh_finish(ap);
1109}
1110
1111EXPORT_SYMBOL_GPL(sata_pmp_port_ops);
1112EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
1113EXPORT_SYMBOL_GPL(sata_pmp_error_handler);
1114