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1 | /* |
2 | * libata-acpi.c |
3 | * Provides ACPI support for PATA/SATA. |
4 | * |
5 | * Copyright (C) 2006 Intel Corp. |
6 | * Copyright (C) 2006 Randy Dunlap |
7 | */ |
8 | |
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 | |
24 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
25 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
26 | MODULE_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 |
32 | struct ata_acpi_gtf { |
33 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ |
34 | } __packed; |
35 | |
36 | /* |
37 | * Helper - belongs in the PCI layer somewhere eventually |
38 | */ |
39 | static int is_pci_dev(struct device *dev) |
40 | { |
41 | return (dev->bus == &pci_bus_type); |
42 | } |
43 | |
44 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
45 | { |
46 | kfree(dev->gtf_cache); |
47 | dev->gtf_cache = NULL; |
48 | } |
49 | |
50 | /** |
51 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects |
52 | * @ap: target SATA port |
53 | * |
54 | * Look up ACPI objects associated with @ap and initialize acpi_handle |
55 | * fields of @ap, the port and devices accordingly. |
56 | * |
57 | * LOCKING: |
58 | * EH context. |
59 | * |
60 | * RETURNS: |
61 | * 0 on success, -errno on failure. |
62 | */ |
63 | void 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 | |
86 | static 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 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
109 | static 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 | } |
124 | |
125 | /** |
126 | * ata_acpi_handle_hotplug - ACPI event handler backend |
127 | * @ap: ATA port ACPI event occurred |
128 | * @dev: ATA device ACPI event occurred (can be NULL) |
129 | * @event: ACPI event which occurred |
130 | * |
131 | * All ACPI bay / device realted events end up in this function. If |
132 | * the event is port-wide @dev is NULL. If the event is specific to a |
133 | * device, @dev points to it. |
134 | * |
135 | * Hotplug (as opposed to unplug) notification is always handled as |
136 | * port-wide while unplug only kills the target device on device-wide |
137 | * event. |
138 | * |
139 | * LOCKING: |
140 | * ACPI notify handler context. May sleep. |
141 | */ |
142 | static 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 | acpi_handle handle; |
149 | |
150 | if (dev) |
151 | handle = dev->acpi_handle; |
152 | else |
153 | handle = ap->acpi_handle; |
154 | |
155 | spin_lock_irqsave(ap->lock, flags); |
156 | /* |
157 | * When dock driver calls into the routine, it will always use |
158 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and |
159 | * ACPI_NOTIFY_EJECT_REQUEST for remove |
160 | */ |
161 | switch (event) { |
162 | case ACPI_NOTIFY_BUS_CHECK: |
163 | case ACPI_NOTIFY_DEVICE_CHECK: |
164 | ata_ehi_push_desc(ehi, "ACPI event"); |
165 | |
166 | ata_ehi_hotplugged(ehi); |
167 | ata_port_freeze(ap); |
168 | break; |
169 | case ACPI_NOTIFY_EJECT_REQUEST: |
170 | ata_ehi_push_desc(ehi, "ACPI event"); |
171 | |
172 | ata_acpi_detach_device(ap, dev); |
173 | wait = 1; |
174 | break; |
175 | } |
176 | |
177 | spin_unlock_irqrestore(ap->lock, flags); |
178 | |
179 | if (wait) |
180 | ata_port_wait_eh(ap); |
181 | } |
182 | |
183 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) |
184 | { |
185 | struct ata_device *dev = data; |
186 | |
187 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
188 | } |
189 | |
190 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) |
191 | { |
192 | struct ata_port *ap = data; |
193 | |
194 | ata_acpi_handle_hotplug(ap, NULL, event); |
195 | } |
196 | |
197 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
198 | u32 event) |
199 | { |
200 | struct kobject *kobj = NULL; |
201 | char event_string[20]; |
202 | char *envp[] = { event_string, NULL }; |
203 | |
204 | if (dev) { |
205 | if (dev->sdev) |
206 | kobj = &dev->sdev->sdev_gendev.kobj; |
207 | } else |
208 | kobj = &ap->dev->kobj; |
209 | |
210 | if (kobj) { |
211 | snprintf(event_string, 20, "BAY_EVENT=%d", event); |
212 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
213 | } |
214 | } |
215 | |
216 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) |
217 | { |
218 | ata_acpi_uevent(data, NULL, event); |
219 | } |
220 | |
221 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) |
222 | { |
223 | struct ata_device *dev = data; |
224 | ata_acpi_uevent(dev->link->ap, dev, event); |
225 | } |
226 | |
227 | static struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
228 | .handler = ata_acpi_dev_notify_dock, |
229 | .uevent = ata_acpi_dev_uevent, |
230 | }; |
231 | |
232 | static struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
233 | .handler = ata_acpi_ap_notify_dock, |
234 | .uevent = ata_acpi_ap_uevent, |
235 | }; |
236 | |
237 | /** |
238 | * ata_acpi_associate - associate ATA host with ACPI objects |
239 | * @host: target ATA host |
240 | * |
241 | * Look up ACPI objects associated with @host and initialize |
242 | * acpi_handle fields of @host, its ports and devices accordingly. |
243 | * |
244 | * LOCKING: |
245 | * EH context. |
246 | * |
247 | * RETURNS: |
248 | * 0 on success, -errno on failure. |
249 | */ |
250 | void ata_acpi_associate(struct ata_host *host) |
251 | { |
252 | int i, j; |
253 | |
254 | if (!is_pci_dev(host->dev) || libata_noacpi) |
255 | return; |
256 | |
257 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
258 | if (!host->acpi_handle) |
259 | return; |
260 | |
261 | for (i = 0; i < host->n_ports; i++) { |
262 | struct ata_port *ap = host->ports[i]; |
263 | |
264 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) |
265 | ata_acpi_associate_sata_port(ap); |
266 | else |
267 | ata_acpi_associate_ide_port(ap); |
268 | |
269 | if (ap->acpi_handle) { |
270 | /* we might be on a docking station */ |
271 | register_hotplug_dock_device(ap->acpi_handle, |
272 | &ata_acpi_ap_dock_ops, ap); |
273 | } |
274 | |
275 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { |
276 | struct ata_device *dev = &ap->link.device[j]; |
277 | |
278 | if (dev->acpi_handle) { |
279 | /* we might be on a docking station */ |
280 | register_hotplug_dock_device(dev->acpi_handle, |
281 | &ata_acpi_dev_dock_ops, dev); |
282 | } |
283 | } |
284 | } |
285 | } |
286 | |
287 | /** |
288 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects |
289 | * @host: target ATA host |
290 | * |
291 | * This function is called during driver detach after the whole host |
292 | * is shut down. |
293 | * |
294 | * LOCKING: |
295 | * EH context. |
296 | */ |
297 | void ata_acpi_dissociate(struct ata_host *host) |
298 | { |
299 | int i; |
300 | |
301 | /* Restore initial _GTM values so that driver which attaches |
302 | * afterward can use them too. |
303 | */ |
304 | for (i = 0; i < host->n_ports; i++) { |
305 | struct ata_port *ap = host->ports[i]; |
306 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
307 | |
308 | if (ap->acpi_handle && gtm) |
309 | ata_acpi_stm(ap, gtm); |
310 | } |
311 | } |
312 | |
313 | /** |
314 | * ata_acpi_gtm - execute _GTM |
315 | * @ap: target ATA port |
316 | * @gtm: out parameter for _GTM result |
317 | * |
318 | * Evaluate _GTM and store the result in @gtm. |
319 | * |
320 | * LOCKING: |
321 | * EH context. |
322 | * |
323 | * RETURNS: |
324 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. |
325 | */ |
326 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
327 | { |
328 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; |
329 | union acpi_object *out_obj; |
330 | acpi_status status; |
331 | int rc = 0; |
332 | |
333 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); |
334 | |
335 | rc = -ENOENT; |
336 | if (status == AE_NOT_FOUND) |
337 | goto out_free; |
338 | |
339 | rc = -EINVAL; |
340 | if (ACPI_FAILURE(status)) { |
341 | ata_port_printk(ap, KERN_ERR, |
342 | "ACPI get timing mode failed (AE 0x%x)\n", |
343 | status); |
344 | goto out_free; |
345 | } |
346 | |
347 | out_obj = output.pointer; |
348 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
349 | ata_port_printk(ap, KERN_WARNING, |
350 | "_GTM returned unexpected object type 0x%x\n", |
351 | out_obj->type); |
352 | |
353 | goto out_free; |
354 | } |
355 | |
356 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { |
357 | ata_port_printk(ap, KERN_ERR, |
358 | "_GTM returned invalid length %d\n", |
359 | out_obj->buffer.length); |
360 | goto out_free; |
361 | } |
362 | |
363 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); |
364 | rc = 0; |
365 | out_free: |
366 | kfree(output.pointer); |
367 | return rc; |
368 | } |
369 | |
370 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
371 | |
372 | /** |
373 | * ata_acpi_stm - execute _STM |
374 | * @ap: target ATA port |
375 | * @stm: timing parameter to _STM |
376 | * |
377 | * Evaluate _STM with timing parameter @stm. |
378 | * |
379 | * LOCKING: |
380 | * EH context. |
381 | * |
382 | * RETURNS: |
383 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. |
384 | */ |
385 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
386 | { |
387 | acpi_status status; |
388 | struct ata_acpi_gtm stm_buf = *stm; |
389 | struct acpi_object_list input; |
390 | union acpi_object in_params[3]; |
391 | |
392 | in_params[0].type = ACPI_TYPE_BUFFER; |
393 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); |
394 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
395 | /* Buffers for id may need byteswapping ? */ |
396 | in_params[1].type = ACPI_TYPE_BUFFER; |
397 | in_params[1].buffer.length = 512; |
398 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
399 | in_params[2].type = ACPI_TYPE_BUFFER; |
400 | in_params[2].buffer.length = 512; |
401 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
402 | |
403 | input.count = 3; |
404 | input.pointer = in_params; |
405 | |
406 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); |
407 | |
408 | if (status == AE_NOT_FOUND) |
409 | return -ENOENT; |
410 | if (ACPI_FAILURE(status)) { |
411 | ata_port_printk(ap, KERN_ERR, |
412 | "ACPI set timing mode failed (status=0x%x)\n", status); |
413 | return -EINVAL; |
414 | } |
415 | return 0; |
416 | } |
417 | |
418 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
419 | |
420 | /** |
421 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
422 | * @dev: target ATA device |
423 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
424 | * |
425 | * This applies to both PATA and SATA drives. |
426 | * |
427 | * The _GTF method has no input parameters. |
428 | * It returns a variable number of register set values (registers |
429 | * hex 1F1..1F7, taskfiles). |
430 | * The <variable number> is not known in advance, so have ACPI-CA |
431 | * allocate the buffer as needed and return it, then free it later. |
432 | * |
433 | * LOCKING: |
434 | * EH context. |
435 | * |
436 | * RETURNS: |
437 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
438 | * if _GTF is invalid. |
439 | */ |
440 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
441 | { |
442 | struct ata_port *ap = dev->link->ap; |
443 | acpi_status status; |
444 | struct acpi_buffer output; |
445 | union acpi_object *out_obj; |
446 | int rc = 0; |
447 | |
448 | /* if _GTF is cached, use the cached value */ |
449 | if (dev->gtf_cache) { |
450 | out_obj = dev->gtf_cache; |
451 | goto done; |
452 | } |
453 | |
454 | /* set up output buffer */ |
455 | output.length = ACPI_ALLOCATE_BUFFER; |
456 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
457 | |
458 | if (ata_msg_probe(ap)) |
459 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
460 | __func__, ap->port_no); |
461 | |
462 | /* _GTF has no input parameters */ |
463 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
464 | out_obj = dev->gtf_cache = output.pointer; |
465 | |
466 | if (ACPI_FAILURE(status)) { |
467 | if (status != AE_NOT_FOUND) { |
468 | ata_dev_printk(dev, KERN_WARNING, |
469 | "_GTF evaluation failed (AE 0x%x)\n", |
470 | status); |
471 | rc = -EINVAL; |
472 | } |
473 | goto out_free; |
474 | } |
475 | |
476 | if (!output.length || !output.pointer) { |
477 | if (ata_msg_probe(ap)) |
478 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
479 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
480 | __func__, |
481 | (unsigned long long)output.length, |
482 | output.pointer); |
483 | rc = -EINVAL; |
484 | goto out_free; |
485 | } |
486 | |
487 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
488 | ata_dev_printk(dev, KERN_WARNING, |
489 | "_GTF unexpected object type 0x%x\n", |
490 | out_obj->type); |
491 | rc = -EINVAL; |
492 | goto out_free; |
493 | } |
494 | |
495 | if (out_obj->buffer.length % REGS_PER_GTF) { |
496 | ata_dev_printk(dev, KERN_WARNING, |
497 | "unexpected _GTF length (%d)\n", |
498 | out_obj->buffer.length); |
499 | rc = -EINVAL; |
500 | goto out_free; |
501 | } |
502 | |
503 | done: |
504 | rc = out_obj->buffer.length / REGS_PER_GTF; |
505 | if (gtf) { |
506 | *gtf = (void *)out_obj->buffer.pointer; |
507 | if (ata_msg_probe(ap)) |
508 | ata_dev_printk(dev, KERN_DEBUG, |
509 | "%s: returning gtf=%p, gtf_count=%d\n", |
510 | __func__, *gtf, rc); |
511 | } |
512 | return rc; |
513 | |
514 | out_free: |
515 | ata_acpi_clear_gtf(dev); |
516 | return rc; |
517 | } |
518 | |
519 | /** |
520 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter |
521 | * @dev: target device |
522 | * @gtm: GTM parameter to use |
523 | * |
524 | * Determine xfermask for @dev from @gtm. |
525 | * |
526 | * LOCKING: |
527 | * None. |
528 | * |
529 | * RETURNS: |
530 | * Determined xfermask. |
531 | */ |
532 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, |
533 | const struct ata_acpi_gtm *gtm) |
534 | { |
535 | unsigned long xfer_mask = 0; |
536 | unsigned int type; |
537 | int unit; |
538 | u8 mode; |
539 | |
540 | /* we always use the 0 slot for crap hardware */ |
541 | unit = dev->devno; |
542 | if (!(gtm->flags & 0x10)) |
543 | unit = 0; |
544 | |
545 | /* PIO */ |
546 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); |
547 | xfer_mask |= ata_xfer_mode2mask(mode); |
548 | |
549 | /* See if we have MWDMA or UDMA data. We don't bother with |
550 | * MWDMA if UDMA is available as this means the BIOS set UDMA |
551 | * and our error changedown if it works is UDMA to PIO anyway. |
552 | */ |
553 | if (!(gtm->flags & (1 << (2 * unit)))) |
554 | type = ATA_SHIFT_MWDMA; |
555 | else |
556 | type = ATA_SHIFT_UDMA; |
557 | |
558 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); |
559 | xfer_mask |= ata_xfer_mode2mask(mode); |
560 | |
561 | return xfer_mask; |
562 | } |
563 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); |
564 | |
565 | /** |
566 | * ata_acpi_cbl_80wire - Check for 80 wire cable |
567 | * @ap: Port to check |
568 | * @gtm: GTM data to use |
569 | * |
570 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
571 | */ |
572 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
573 | { |
574 | struct ata_device *dev; |
575 | |
576 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
577 | unsigned long xfer_mask, udma_mask; |
578 | |
579 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
580 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); |
581 | |
582 | if (udma_mask & ~ATA_UDMA_MASK_40C) |
583 | return 1; |
584 | } |
585 | |
586 | return 0; |
587 | } |
588 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
589 | |
590 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
591 | const struct ata_acpi_gtf *gtf, |
592 | struct ata_taskfile *tf) |
593 | { |
594 | ata_tf_init(dev, tf); |
595 | |
596 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
597 | tf->protocol = ATA_PROT_NODATA; |
598 | tf->feature = gtf->tf[0]; /* 0x1f1 */ |
599 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ |
600 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ |
601 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ |
602 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ |
603 | tf->device = gtf->tf[5]; /* 0x1f6 */ |
604 | tf->command = gtf->tf[6]; /* 0x1f7 */ |
605 | } |
606 | |
607 | static int ata_acpi_filter_tf(struct ata_device *dev, |
608 | const struct ata_taskfile *tf, |
609 | const struct ata_taskfile *ptf) |
610 | { |
611 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
612 | /* libata doesn't use ACPI to configure transfer mode. |
613 | * It will only confuse device configuration. Skip. |
614 | */ |
615 | if (tf->command == ATA_CMD_SET_FEATURES && |
616 | tf->feature == SETFEATURES_XFER) |
617 | return 1; |
618 | } |
619 | |
620 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
621 | /* BIOS writers, sorry but we don't wanna lock |
622 | * features unless the user explicitly said so. |
623 | */ |
624 | |
625 | /* DEVICE CONFIGURATION FREEZE LOCK */ |
626 | if (tf->command == ATA_CMD_CONF_OVERLAY && |
627 | tf->feature == ATA_DCO_FREEZE_LOCK) |
628 | return 1; |
629 | |
630 | /* SECURITY FREEZE LOCK */ |
631 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) |
632 | return 1; |
633 | |
634 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ |
635 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && |
636 | tf->command == ATA_CMD_SET_MAX && |
637 | (tf->feature == ATA_SET_MAX_LOCK || |
638 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) |
639 | return 1; |
640 | } |
641 | |
642 | if (tf->command == ATA_CMD_SET_FEATURES && |
643 | tf->feature == SETFEATURES_SATA_ENABLE) { |
644 | /* inhibit enabling DIPM */ |
645 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
646 | tf->nsect == SATA_DIPM) |
647 | return 1; |
648 | |
649 | /* inhibit FPDMA non-zero offset */ |
650 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
651 | (tf->nsect == SATA_FPDMA_OFFSET || |
652 | tf->nsect == SATA_FPDMA_IN_ORDER)) |
653 | return 1; |
654 | |
655 | /* inhibit FPDMA auto activation */ |
656 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
657 | tf->nsect == SATA_FPDMA_AA) |
658 | return 1; |
659 | } |
660 | |
661 | return 0; |
662 | } |
663 | |
664 | /** |
665 | * ata_acpi_run_tf - send taskfile registers to host controller |
666 | * @dev: target ATA device |
667 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
668 | * |
669 | * Outputs ATA taskfile to standard ATA host controller using MMIO |
670 | * or PIO as indicated by the ATA_FLAG_MMIO flag. |
671 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
672 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
673 | * hob_lbal, hob_lbam, and hob_lbah. |
674 | * |
675 | * This function waits for idle (!BUSY and !DRQ) after writing |
676 | * registers. If the control register has a new value, this |
677 | * function also waits for idle after writing control and before |
678 | * writing the remaining registers. |
679 | * |
680 | * LOCKING: |
681 | * EH context. |
682 | * |
683 | * RETURNS: |
684 | * 1 if command is executed successfully. 0 if ignored, rejected or |
685 | * filtered out, -errno on other errors. |
686 | */ |
687 | static int ata_acpi_run_tf(struct ata_device *dev, |
688 | const struct ata_acpi_gtf *gtf, |
689 | const struct ata_acpi_gtf *prev_gtf) |
690 | { |
691 | struct ata_taskfile *pptf = NULL; |
692 | struct ata_taskfile tf, ptf, rtf; |
693 | unsigned int err_mask; |
694 | const char *level; |
695 | const char *descr; |
696 | char msg[60]; |
697 | int rc; |
698 | |
699 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
700 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) |
701 | && (gtf->tf[6] == 0)) |
702 | return 0; |
703 | |
704 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
705 | if (prev_gtf) { |
706 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); |
707 | pptf = &ptf; |
708 | } |
709 | |
710 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
711 | rtf = tf; |
712 | err_mask = ata_exec_internal(dev, &rtf, NULL, |
713 | DMA_NONE, NULL, 0, 0); |
714 | |
715 | switch (err_mask) { |
716 | case 0: |
717 | level = KERN_DEBUG; |
718 | snprintf(msg, sizeof(msg), "succeeded"); |
719 | rc = 1; |
720 | break; |
721 | |
722 | case AC_ERR_DEV: |
723 | level = KERN_INFO; |
724 | snprintf(msg, sizeof(msg), |
725 | "rejected by device (Stat=0x%02x Err=0x%02x)", |
726 | rtf.command, rtf.feature); |
727 | rc = 0; |
728 | break; |
729 | |
730 | default: |
731 | level = KERN_ERR; |
732 | snprintf(msg, sizeof(msg), |
733 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", |
734 | err_mask, rtf.command, rtf.feature); |
735 | rc = -EIO; |
736 | break; |
737 | } |
738 | } else { |
739 | level = KERN_INFO; |
740 | snprintf(msg, sizeof(msg), "filtered out"); |
741 | rc = 0; |
742 | } |
743 | descr = ata_get_cmd_descript(tf.command); |
744 | |
745 | ata_dev_printk(dev, level, |
746 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
747 | tf.command, tf.feature, tf.nsect, tf.lbal, |
748 | tf.lbam, tf.lbah, tf.device, |
749 | (descr ? descr : "unknown"), msg); |
750 | |
751 | return rc; |
752 | } |
753 | |
754 | /** |
755 | * ata_acpi_exec_tfs - get then write drive taskfile settings |
756 | * @dev: target ATA device |
757 | * @nr_executed: out parameter for the number of executed commands |
758 | * |
759 | * Evaluate _GTF and execute returned taskfiles. |
760 | * |
761 | * LOCKING: |
762 | * EH context. |
763 | * |
764 | * RETURNS: |
765 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
766 | * -errno on other errors. |
767 | */ |
768 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
769 | { |
770 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
771 | int gtf_count, i, rc; |
772 | |
773 | /* get taskfiles */ |
774 | rc = ata_dev_get_GTF(dev, >f); |
775 | if (rc < 0) |
776 | return rc; |
777 | gtf_count = rc; |
778 | |
779 | /* execute them */ |
780 | for (i = 0; i < gtf_count; i++, gtf++) { |
781 | rc = ata_acpi_run_tf(dev, gtf, pgtf); |
782 | if (rc < 0) |
783 | break; |
784 | if (rc) { |
785 | (*nr_executed)++; |
786 | pgtf = gtf; |
787 | } |
788 | } |
789 | |
790 | ata_acpi_clear_gtf(dev); |
791 | |
792 | if (rc < 0) |
793 | return rc; |
794 | return 0; |
795 | } |
796 | |
797 | /** |
798 | * ata_acpi_push_id - send Identify data to drive |
799 | * @dev: target ATA device |
800 | * |
801 | * _SDD ACPI object: for SATA mode only |
802 | * Must be after Identify (Packet) Device -- uses its data |
803 | * ATM this function never returns a failure. It is an optional |
804 | * method and if it fails for whatever reason, we should still |
805 | * just keep going. |
806 | * |
807 | * LOCKING: |
808 | * EH context. |
809 | * |
810 | * RETURNS: |
811 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
812 | */ |
813 | static int ata_acpi_push_id(struct ata_device *dev) |
814 | { |
815 | struct ata_port *ap = dev->link->ap; |
816 | acpi_status status; |
817 | struct acpi_object_list input; |
818 | union acpi_object in_params[1]; |
819 | |
820 | if (ata_msg_probe(ap)) |
821 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
822 | __func__, dev->devno, ap->port_no); |
823 | |
824 | /* Give the drive Identify data to the drive via the _SDD method */ |
825 | /* _SDD: set up input parameters */ |
826 | input.count = 1; |
827 | input.pointer = in_params; |
828 | in_params[0].type = ACPI_TYPE_BUFFER; |
829 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
830 | in_params[0].buffer.pointer = (u8 *)dev->id; |
831 | /* Output buffer: _SDD has no output */ |
832 | |
833 | /* It's OK for _SDD to be missing too. */ |
834 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
835 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
836 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
837 | |
838 | if (status == AE_NOT_FOUND) |
839 | return -ENOENT; |
840 | |
841 | if (ACPI_FAILURE(status)) { |
842 | ata_dev_printk(dev, KERN_WARNING, |
843 | "ACPI _SDD failed (AE 0x%x)\n", status); |
844 | return -EIO; |
845 | } |
846 | |
847 | return 0; |
848 | } |
849 | |
850 | /** |
851 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend |
852 | * @ap: target ATA port |
853 | * |
854 | * This function is called when @ap is about to be suspended. All |
855 | * devices are already put to sleep but the port_suspend() callback |
856 | * hasn't been executed yet. Error return from this function aborts |
857 | * suspend. |
858 | * |
859 | * LOCKING: |
860 | * EH context. |
861 | * |
862 | * RETURNS: |
863 | * 0 on success, -errno on failure. |
864 | */ |
865 | int ata_acpi_on_suspend(struct ata_port *ap) |
866 | { |
867 | /* nada */ |
868 | return 0; |
869 | } |
870 | |
871 | /** |
872 | * ata_acpi_on_resume - ATA ACPI hook called on resume |
873 | * @ap: target ATA port |
874 | * |
875 | * This function is called when @ap is resumed - right after port |
876 | * itself is resumed but before any EH action is taken. |
877 | * |
878 | * LOCKING: |
879 | * EH context. |
880 | */ |
881 | void ata_acpi_on_resume(struct ata_port *ap) |
882 | { |
883 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
884 | struct ata_device *dev; |
885 | |
886 | if (ap->acpi_handle && gtm) { |
887 | /* _GTM valid */ |
888 | |
889 | /* restore timing parameters */ |
890 | ata_acpi_stm(ap, gtm); |
891 | |
892 | /* _GTF should immediately follow _STM so that it can |
893 | * use values set by _STM. Cache _GTF result and |
894 | * schedule _GTF. |
895 | */ |
896 | ata_for_each_dev(dev, &ap->link, ALL) { |
897 | ata_acpi_clear_gtf(dev); |
898 | if (ata_dev_enabled(dev) && |
899 | ata_dev_get_GTF(dev, NULL) >= 0) |
900 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
901 | } |
902 | } else { |
903 | /* SATA _GTF needs to be evaulated after _SDD and |
904 | * there's no reason to evaluate IDE _GTF early |
905 | * without _STM. Clear cache and schedule _GTF. |
906 | */ |
907 | ata_for_each_dev(dev, &ap->link, ALL) { |
908 | ata_acpi_clear_gtf(dev); |
909 | if (ata_dev_enabled(dev)) |
910 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
911 | } |
912 | } |
913 | } |
914 | |
915 | /** |
916 | * ata_acpi_set_state - set the port power state |
917 | * @ap: target ATA port |
918 | * @state: state, on/off |
919 | * |
920 | * This function executes the _PS0/_PS3 ACPI method to set the power state. |
921 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off |
922 | */ |
923 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
924 | { |
925 | struct ata_device *dev; |
926 | |
927 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) |
928 | return; |
929 | |
930 | /* channel first and then drives for power on and vica versa |
931 | for power off */ |
932 | if (state.event == PM_EVENT_ON) |
933 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); |
934 | |
935 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
936 | if (dev->acpi_handle) |
937 | acpi_bus_set_power(dev->acpi_handle, |
938 | state.event == PM_EVENT_ON ? |
939 | ACPI_STATE_D0 : ACPI_STATE_D3); |
940 | } |
941 | if (state.event != PM_EVENT_ON) |
942 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); |
943 | } |
944 | |
945 | /** |
946 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration |
947 | * @dev: target ATA device |
948 | * |
949 | * This function is called when @dev is about to be configured. |
950 | * IDENTIFY data might have been modified after this hook is run. |
951 | * |
952 | * LOCKING: |
953 | * EH context. |
954 | * |
955 | * RETURNS: |
956 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, |
957 | * -errno on failure. |
958 | */ |
959 | int ata_acpi_on_devcfg(struct ata_device *dev) |
960 | { |
961 | struct ata_port *ap = dev->link->ap; |
962 | struct ata_eh_context *ehc = &ap->link.eh_context; |
963 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
964 | int nr_executed = 0; |
965 | int rc; |
966 | |
967 | if (!dev->acpi_handle) |
968 | return 0; |
969 | |
970 | /* do we need to do _GTF? */ |
971 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && |
972 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) |
973 | return 0; |
974 | |
975 | /* do _SDD if SATA */ |
976 | if (acpi_sata) { |
977 | rc = ata_acpi_push_id(dev); |
978 | if (rc && rc != -ENOENT) |
979 | goto acpi_err; |
980 | } |
981 | |
982 | /* do _GTF */ |
983 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
984 | if (rc) |
985 | goto acpi_err; |
986 | |
987 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; |
988 | |
989 | /* refresh IDENTIFY page if any _GTF command has been executed */ |
990 | if (nr_executed) { |
991 | rc = ata_dev_reread_id(dev, 0); |
992 | if (rc < 0) { |
993 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " |
994 | "after ACPI commands\n"); |
995 | return rc; |
996 | } |
997 | } |
998 | |
999 | return 0; |
1000 | |
1001 | acpi_err: |
1002 | /* ignore evaluation failure if we can continue safely */ |
1003 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
1004 | return 0; |
1005 | |
1006 | /* fail and let EH retry once more for unknown IO errors */ |
1007 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { |
1008 | dev->flags |= ATA_DFLAG_ACPI_FAILED; |
1009 | return rc; |
1010 | } |
1011 | |
1012 | ata_dev_printk(dev, KERN_WARNING, |
1013 | "ACPI: failed the second time, disabled\n"); |
1014 | dev->acpi_handle = NULL; |
1015 | |
1016 | /* We can safely continue if no _GTF command has been executed |
1017 | * and port is not frozen. |
1018 | */ |
1019 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
1020 | return 0; |
1021 | |
1022 | return rc; |
1023 | } |
1024 | |
1025 | /** |
1026 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled |
1027 | * @dev: target ATA device |
1028 | * |
1029 | * This function is called when @dev is about to be disabled. |
1030 | * |
1031 | * LOCKING: |
1032 | * EH context. |
1033 | */ |
1034 | void ata_acpi_on_disable(struct ata_device *dev) |
1035 | { |
1036 | ata_acpi_clear_gtf(dev); |
1037 | } |
1038 |
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