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9#include <linux/module.h>
10#include <linux/ata.h>
11#include <linux/delay.h>
12#include <linux/device.h>
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/acpi.h>
16#include <linux/libata.h>
17#include <linux/pci.h>
18#include <linux/slab.h>
19#include <scsi/scsi_device.h>
20#include "libata.h"
21
22#include <acpi/acpi_bus.h>
23
24unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
25module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
26MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)");
27
28#define NO_PORT_MULT 0xffff
29#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
30
31#define REGS_PER_GTF 7
32struct ata_acpi_gtf {
33 u8 tf[REGS_PER_GTF];
34} __packed;
35
36
37
38
39static int is_pci_dev(struct device *dev)
40{
41 return (dev->bus == &pci_bus_type);
42}
43
44static void ata_acpi_clear_gtf(struct ata_device *dev)
45{
46 kfree(dev->gtf_cache);
47 dev->gtf_cache = NULL;
48}
49
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55
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57
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59
60
61
62
63void ata_acpi_associate_sata_port(struct ata_port *ap)
64{
65 WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
66
67 if (!sata_pmp_attached(ap)) {
68 u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
69
70 ap->link.device->acpi_handle =
71 acpi_get_child(ap->host->acpi_handle, adr);
72 } else {
73 struct ata_link *link;
74
75 ap->link.device->acpi_handle = NULL;
76
77 ata_for_each_link(link, ap, EDGE) {
78 u64 adr = SATA_ADR(ap->port_no, link->pmp);
79
80 link->device->acpi_handle =
81 acpi_get_child(ap->host->acpi_handle, adr);
82 }
83 }
84}
85
86static void ata_acpi_associate_ide_port(struct ata_port *ap)
87{
88 int max_devices, i;
89
90 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
91 if (!ap->acpi_handle)
92 return;
93
94 max_devices = 1;
95 if (ap->flags & ATA_FLAG_SLAVE_POSS)
96 max_devices++;
97
98 for (i = 0; i < max_devices; i++) {
99 struct ata_device *dev = &ap->link.device[i];
100
101 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
102 }
103
104 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
105 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
106}
107
108
109static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
110{
111 if (dev)
112 dev->flags |= ATA_DFLAG_DETACH;
113 else {
114 struct ata_link *tlink;
115 struct ata_device *tdev;
116
117 ata_for_each_link(tlink, ap, EDGE)
118 ata_for_each_dev(tdev, tlink, ALL)
119 tdev->flags |= ATA_DFLAG_DETACH;
120 }
121
122 ata_port_schedule_eh(ap);
123}
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141
142static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
143 u32 event)
144{
145 struct ata_eh_info *ehi = &ap->link.eh_info;
146 int wait = 0;
147 unsigned long flags;
148
149 spin_lock_irqsave(ap->lock, flags);
150
151
152
153
154
155 switch (event) {
156 case ACPI_NOTIFY_BUS_CHECK:
157 case ACPI_NOTIFY_DEVICE_CHECK:
158 ata_ehi_push_desc(ehi, "ACPI event");
159
160 ata_ehi_hotplugged(ehi);
161 ata_port_freeze(ap);
162 break;
163 case ACPI_NOTIFY_EJECT_REQUEST:
164 ata_ehi_push_desc(ehi, "ACPI event");
165
166 ata_acpi_detach_device(ap, dev);
167 wait = 1;
168 break;
169 }
170
171 spin_unlock_irqrestore(ap->lock, flags);
172
173 if (wait)
174 ata_port_wait_eh(ap);
175}
176
177static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
178{
179 struct ata_device *dev = data;
180
181 ata_acpi_handle_hotplug(dev->link->ap, dev, event);
182}
183
184static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
185{
186 struct ata_port *ap = data;
187
188 ata_acpi_handle_hotplug(ap, NULL, event);
189}
190
191static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
192 u32 event)
193{
194 struct kobject *kobj = NULL;
195 char event_string[20];
196 char *envp[] = { event_string, NULL };
197
198 if (dev) {
199 if (dev->sdev)
200 kobj = &dev->sdev->sdev_gendev.kobj;
201 } else
202 kobj = &ap->dev->kobj;
203
204 if (kobj) {
205 snprintf(event_string, 20, "BAY_EVENT=%d", event);
206 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
207 }
208}
209
210static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
211{
212 ata_acpi_uevent(data, NULL, event);
213}
214
215static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
216{
217 struct ata_device *dev = data;
218 ata_acpi_uevent(dev->link->ap, dev, event);
219}
220
221static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
222 .handler = ata_acpi_dev_notify_dock,
223 .uevent = ata_acpi_dev_uevent,
224};
225
226static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
227 .handler = ata_acpi_ap_notify_dock,
228 .uevent = ata_acpi_ap_uevent,
229};
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243
244void ata_acpi_associate(struct ata_host *host)
245{
246 int i, j;
247
248 if (!is_pci_dev(host->dev) || libata_noacpi)
249 return;
250
251 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
252 if (!host->acpi_handle)
253 return;
254
255 for (i = 0; i < host->n_ports; i++) {
256 struct ata_port *ap = host->ports[i];
257
258 if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
259 ata_acpi_associate_sata_port(ap);
260 else
261 ata_acpi_associate_ide_port(ap);
262
263 if (ap->acpi_handle) {
264
265 register_hotplug_dock_device(ap->acpi_handle,
266 &ata_acpi_ap_dock_ops, ap);
267 }
268
269 for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
270 struct ata_device *dev = &ap->link.device[j];
271
272 if (dev->acpi_handle) {
273
274 register_hotplug_dock_device(dev->acpi_handle,
275 &ata_acpi_dev_dock_ops, dev);
276 }
277 }
278 }
279}
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289
290
291void ata_acpi_dissociate(struct ata_host *host)
292{
293 int i;
294
295
296
297
298 for (i = 0; i < host->n_ports; i++) {
299 struct ata_port *ap = host->ports[i];
300 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
301
302 if (ap->acpi_handle && gtm)
303 ata_acpi_stm(ap, gtm);
304 }
305}
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319
320int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
321{
322 struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
323 union acpi_object *out_obj;
324 acpi_status status;
325 int rc = 0;
326
327 status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
328
329 rc = -ENOENT;
330 if (status == AE_NOT_FOUND)
331 goto out_free;
332
333 rc = -EINVAL;
334 if (ACPI_FAILURE(status)) {
335 ata_port_printk(ap, KERN_ERR,
336 "ACPI get timing mode failed (AE 0x%x)\n",
337 status);
338 goto out_free;
339 }
340
341 out_obj = output.pointer;
342 if (out_obj->type != ACPI_TYPE_BUFFER) {
343 ata_port_printk(ap, KERN_WARNING,
344 "_GTM returned unexpected object type 0x%x\n",
345 out_obj->type);
346
347 goto out_free;
348 }
349
350 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
351 ata_port_printk(ap, KERN_ERR,
352 "_GTM returned invalid length %d\n",
353 out_obj->buffer.length);
354 goto out_free;
355 }
356
357 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
358 rc = 0;
359 out_free:
360 kfree(output.pointer);
361 return rc;
362}
363
364EXPORT_SYMBOL_GPL(ata_acpi_gtm);
365
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378
379int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
380{
381 acpi_status status;
382 struct ata_acpi_gtm stm_buf = *stm;
383 struct acpi_object_list input;
384 union acpi_object in_params[3];
385
386 in_params[0].type = ACPI_TYPE_BUFFER;
387 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
388 in_params[0].buffer.pointer = (u8 *)&stm_buf;
389
390 in_params[1].type = ACPI_TYPE_BUFFER;
391 in_params[1].buffer.length = 512;
392 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
393 in_params[2].type = ACPI_TYPE_BUFFER;
394 in_params[2].buffer.length = 512;
395 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
396
397 input.count = 3;
398 input.pointer = in_params;
399
400 status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
401
402 if (status == AE_NOT_FOUND)
403 return -ENOENT;
404 if (ACPI_FAILURE(status)) {
405 ata_port_printk(ap, KERN_ERR,
406 "ACPI set timing mode failed (status=0x%x)\n", status);
407 return -EINVAL;
408 }
409 return 0;
410}
411
412EXPORT_SYMBOL_GPL(ata_acpi_stm);
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433
434static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
435{
436 struct ata_port *ap = dev->link->ap;
437 acpi_status status;
438 struct acpi_buffer output;
439 union acpi_object *out_obj;
440 int rc = 0;
441
442
443 if (dev->gtf_cache) {
444 out_obj = dev->gtf_cache;
445 goto done;
446 }
447
448
449 output.length = ACPI_ALLOCATE_BUFFER;
450 output.pointer = NULL;
451
452 if (ata_msg_probe(ap))
453 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
454 __func__, ap->port_no);
455
456
457 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
458 out_obj = dev->gtf_cache = output.pointer;
459
460 if (ACPI_FAILURE(status)) {
461 if (status != AE_NOT_FOUND) {
462 ata_dev_printk(dev, KERN_WARNING,
463 "_GTF evaluation failed (AE 0x%x)\n",
464 status);
465 rc = -EINVAL;
466 }
467 goto out_free;
468 }
469
470 if (!output.length || !output.pointer) {
471 if (ata_msg_probe(ap))
472 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
473 "length or ptr is NULL (0x%llx, 0x%p)\n",
474 __func__,
475 (unsigned long long)output.length,
476 output.pointer);
477 rc = -EINVAL;
478 goto out_free;
479 }
480
481 if (out_obj->type != ACPI_TYPE_BUFFER) {
482 ata_dev_printk(dev, KERN_WARNING,
483 "_GTF unexpected object type 0x%x\n",
484 out_obj->type);
485 rc = -EINVAL;
486 goto out_free;
487 }
488
489 if (out_obj->buffer.length % REGS_PER_GTF) {
490 ata_dev_printk(dev, KERN_WARNING,
491 "unexpected _GTF length (%d)\n",
492 out_obj->buffer.length);
493 rc = -EINVAL;
494 goto out_free;
495 }
496
497 done:
498 rc = out_obj->buffer.length / REGS_PER_GTF;
499 if (gtf) {
500 *gtf = (void *)out_obj->buffer.pointer;
501 if (ata_msg_probe(ap))
502 ata_dev_printk(dev, KERN_DEBUG,
503 "%s: returning gtf=%p, gtf_count=%d\n",
504 __func__, *gtf, rc);
505 }
506 return rc;
507
508 out_free:
509 ata_acpi_clear_gtf(dev);
510 return rc;
511}
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526unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
527 const struct ata_acpi_gtm *gtm)
528{
529 unsigned long xfer_mask = 0;
530 unsigned int type;
531 int unit;
532 u8 mode;
533
534
535 unit = dev->devno;
536 if (!(gtm->flags & 0x10))
537 unit = 0;
538
539
540 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
541 xfer_mask |= ata_xfer_mode2mask(mode);
542
543
544
545
546
547 if (!(gtm->flags & (1 << (2 * unit))))
548 type = ATA_SHIFT_MWDMA;
549 else
550 type = ATA_SHIFT_UDMA;
551
552 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
553 xfer_mask |= ata_xfer_mode2mask(mode);
554
555 return xfer_mask;
556}
557EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
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566int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
567{
568 struct ata_device *dev;
569
570 ata_for_each_dev(dev, &ap->link, ENABLED) {
571 unsigned long xfer_mask, udma_mask;
572
573 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
574 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
575
576 if (udma_mask & ~ATA_UDMA_MASK_40C)
577 return 1;
578 }
579
580 return 0;
581}
582EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
583
584static void ata_acpi_gtf_to_tf(struct ata_device *dev,
585 const struct ata_acpi_gtf *gtf,
586 struct ata_taskfile *tf)
587{
588 ata_tf_init(dev, tf);
589
590 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
591 tf->protocol = ATA_PROT_NODATA;
592 tf->feature = gtf->tf[0];
593 tf->nsect = gtf->tf[1];
594 tf->lbal = gtf->tf[2];
595 tf->lbam = gtf->tf[3];
596 tf->lbah = gtf->tf[4];
597 tf->device = gtf->tf[5];
598 tf->command = gtf->tf[6];
599}
600
601static int ata_acpi_filter_tf(struct ata_device *dev,
602 const struct ata_taskfile *tf,
603 const struct ata_taskfile *ptf)
604{
605 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
606
607
608
609 if (tf->command == ATA_CMD_SET_FEATURES &&
610 tf->feature == SETFEATURES_XFER)
611 return 1;
612 }
613
614 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
615
616
617
618
619
620 if (tf->command == ATA_CMD_CONF_OVERLAY &&
621 tf->feature == ATA_DCO_FREEZE_LOCK)
622 return 1;
623
624
625 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
626 return 1;
627
628
629 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
630 tf->command == ATA_CMD_SET_MAX &&
631 (tf->feature == ATA_SET_MAX_LOCK ||
632 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
633 return 1;
634 }
635
636 if (tf->command == ATA_CMD_SET_FEATURES &&
637 tf->feature == SETFEATURES_SATA_ENABLE) {
638
639 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
640 tf->nsect == SATA_DIPM)
641 return 1;
642
643
644 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
645 (tf->nsect == SATA_FPDMA_OFFSET ||
646 tf->nsect == SATA_FPDMA_IN_ORDER))
647 return 1;
648
649
650 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
651 tf->nsect == SATA_FPDMA_AA)
652 return 1;
653 }
654
655 return 0;
656}
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681static int ata_acpi_run_tf(struct ata_device *dev,
682 const struct ata_acpi_gtf *gtf,
683 const struct ata_acpi_gtf *prev_gtf)
684{
685 struct ata_taskfile *pptf = NULL;
686 struct ata_taskfile tf, ptf, rtf;
687 unsigned int err_mask;
688 const char *level;
689 const char *descr;
690 char msg[60];
691 int rc;
692
693 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
694 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
695 && (gtf->tf[6] == 0))
696 return 0;
697
698 ata_acpi_gtf_to_tf(dev, gtf, &tf);
699 if (prev_gtf) {
700 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
701 pptf = &ptf;
702 }
703
704 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
705 rtf = tf;
706 err_mask = ata_exec_internal(dev, &rtf, NULL,
707 DMA_NONE, NULL, 0, 0);
708
709 switch (err_mask) {
710 case 0:
711 level = KERN_DEBUG;
712 snprintf(msg, sizeof(msg), "succeeded");
713 rc = 1;
714 break;
715
716 case AC_ERR_DEV:
717 level = KERN_INFO;
718 snprintf(msg, sizeof(msg),
719 "rejected by device (Stat=0x%02x Err=0x%02x)",
720 rtf.command, rtf.feature);
721 rc = 0;
722 break;
723
724 default:
725 level = KERN_ERR;
726 snprintf(msg, sizeof(msg),
727 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
728 err_mask, rtf.command, rtf.feature);
729 rc = -EIO;
730 break;
731 }
732 } else {
733 level = KERN_INFO;
734 snprintf(msg, sizeof(msg), "filtered out");
735 rc = 0;
736 }
737 descr = ata_get_cmd_descript(tf.command);
738
739 ata_dev_printk(dev, level,
740 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
741 tf.command, tf.feature, tf.nsect, tf.lbal,
742 tf.lbam, tf.lbah, tf.device,
743 (descr ? descr : "unknown"), msg);
744
745 return rc;
746}
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762static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
763{
764 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
765 int gtf_count, i, rc;
766
767
768 rc = ata_dev_get_GTF(dev, >f);
769 if (rc < 0)
770 return rc;
771 gtf_count = rc;
772
773
774 for (i = 0; i < gtf_count; i++, gtf++) {
775 rc = ata_acpi_run_tf(dev, gtf, pgtf);
776 if (rc < 0)
777 break;
778 if (rc) {
779 (*nr_executed)++;
780 pgtf = gtf;
781 }
782 }
783
784 ata_acpi_clear_gtf(dev);
785
786 if (rc < 0)
787 return rc;
788 return 0;
789}
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807static int ata_acpi_push_id(struct ata_device *dev)
808{
809 struct ata_port *ap = dev->link->ap;
810 acpi_status status;
811 struct acpi_object_list input;
812 union acpi_object in_params[1];
813
814 if (ata_msg_probe(ap))
815 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
816 __func__, dev->devno, ap->port_no);
817
818
819
820 input.count = 1;
821 input.pointer = in_params;
822 in_params[0].type = ACPI_TYPE_BUFFER;
823 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
824 in_params[0].buffer.pointer = (u8 *)dev->id;
825
826
827
828 swap_buf_le16(dev->id, ATA_ID_WORDS);
829 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
830 swap_buf_le16(dev->id, ATA_ID_WORDS);
831
832 if (status == AE_NOT_FOUND)
833 return -ENOENT;
834
835 if (ACPI_FAILURE(status)) {
836 ata_dev_printk(dev, KERN_WARNING,
837 "ACPI _SDD failed (AE 0x%x)\n", status);
838 return -EIO;
839 }
840
841 return 0;
842}
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859int ata_acpi_on_suspend(struct ata_port *ap)
860{
861
862 return 0;
863}
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873
874
875void ata_acpi_on_resume(struct ata_port *ap)
876{
877 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
878 struct ata_device *dev;
879
880 if (ap->acpi_handle && gtm) {
881
882
883
884 ata_acpi_stm(ap, gtm);
885
886
887
888
889
890 ata_for_each_dev(dev, &ap->link, ALL) {
891 ata_acpi_clear_gtf(dev);
892 if (ata_dev_enabled(dev) &&
893 ata_dev_get_GTF(dev, NULL) >= 0)
894 dev->flags |= ATA_DFLAG_ACPI_PENDING;
895 }
896 } else {
897
898
899
900
901 ata_for_each_dev(dev, &ap->link, ALL) {
902 ata_acpi_clear_gtf(dev);
903 if (ata_dev_enabled(dev))
904 dev->flags |= ATA_DFLAG_ACPI_PENDING;
905 }
906 }
907}
908
909
910
911
912
913
914
915
916
917void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
918{
919 struct ata_device *dev;
920
921 if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
922 return;
923
924
925
926 if (state.event == PM_EVENT_ON)
927 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
928
929 ata_for_each_dev(dev, &ap->link, ENABLED) {
930 if (dev->acpi_handle)
931 acpi_bus_set_power(dev->acpi_handle,
932 state.event == PM_EVENT_ON ?
933 ACPI_STATE_D0 : ACPI_STATE_D3);
934 }
935 if (state.event != PM_EVENT_ON)
936 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
937}
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953int ata_acpi_on_devcfg(struct ata_device *dev)
954{
955 struct ata_port *ap = dev->link->ap;
956 struct ata_eh_context *ehc = &ap->link.eh_context;
957 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
958 int nr_executed = 0;
959 int rc;
960
961 if (!dev->acpi_handle)
962 return 0;
963
964
965 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
966 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
967 return 0;
968
969
970 if (acpi_sata) {
971 rc = ata_acpi_push_id(dev);
972 if (rc && rc != -ENOENT)
973 goto acpi_err;
974 }
975
976
977 rc = ata_acpi_exec_tfs(dev, &nr_executed);
978 if (rc)
979 goto acpi_err;
980
981 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
982
983
984 if (nr_executed) {
985 rc = ata_dev_reread_id(dev, 0);
986 if (rc < 0) {
987 ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
988 "after ACPI commands\n");
989 return rc;
990 }
991 }
992
993 return 0;
994
995 acpi_err:
996
997 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
998 return 0;
999
1000
1001 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1002 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1003 return rc;
1004 }
1005
1006 ata_dev_printk(dev, KERN_WARNING,
1007 "ACPI: failed the second time, disabled\n");
1008 dev->acpi_handle = NULL;
1009
1010
1011
1012
1013 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1014 return 0;
1015
1016 return rc;
1017}
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028void ata_acpi_on_disable(struct ata_device *dev)
1029{
1030 ata_acpi_clear_gtf(dev);
1031}
1032