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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 <linux/pm_runtime.h> |
20 | #include <linux/pm_qos.h> |
21 | #include <scsi/scsi_device.h> |
22 | #include "libata.h" |
23 | |
24 | #include <acpi/acpi_bus.h> |
25 | |
26 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
27 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
28 | 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)"); |
29 | |
30 | #define NO_PORT_MULT 0xffff |
31 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
32 | |
33 | #define REGS_PER_GTF 7 |
34 | struct ata_acpi_gtf { |
35 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ |
36 | } __packed; |
37 | |
38 | /* |
39 | * Helper - belongs in the PCI layer somewhere eventually |
40 | */ |
41 | static int is_pci_dev(struct device *dev) |
42 | { |
43 | return (dev->bus == &pci_bus_type); |
44 | } |
45 | |
46 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
47 | { |
48 | kfree(dev->gtf_cache); |
49 | dev->gtf_cache = NULL; |
50 | } |
51 | |
52 | /** |
53 | * ata_ap_acpi_handle - provide the acpi_handle for an ata_port |
54 | * @ap: the acpi_handle returned will correspond to this port |
55 | * |
56 | * Returns the acpi_handle for the ACPI namespace object corresponding to |
57 | * the ata_port passed into the function, or NULL if no such object exists |
58 | */ |
59 | acpi_handle ata_ap_acpi_handle(struct ata_port *ap) |
60 | { |
61 | if (ap->flags & ATA_FLAG_ACPI_SATA) |
62 | return NULL; |
63 | |
64 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), ap->port_no); |
65 | } |
66 | EXPORT_SYMBOL(ata_ap_acpi_handle); |
67 | |
68 | /** |
69 | * ata_dev_acpi_handle - provide the acpi_handle for an ata_device |
70 | * @dev: the acpi_device returned will correspond to this port |
71 | * |
72 | * Returns the acpi_handle for the ACPI namespace object corresponding to |
73 | * the ata_device passed into the function, or NULL if no such object exists |
74 | */ |
75 | acpi_handle ata_dev_acpi_handle(struct ata_device *dev) |
76 | { |
77 | acpi_integer adr; |
78 | struct ata_port *ap = dev->link->ap; |
79 | |
80 | if (dev->flags & ATA_DFLAG_ACPI_DISABLED) |
81 | return NULL; |
82 | |
83 | if (ap->flags & ATA_FLAG_ACPI_SATA) { |
84 | if (!sata_pmp_attached(ap)) |
85 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
86 | else |
87 | adr = SATA_ADR(ap->port_no, dev->link->pmp); |
88 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), adr); |
89 | } else |
90 | return acpi_get_child(ata_ap_acpi_handle(ap), dev->devno); |
91 | } |
92 | EXPORT_SYMBOL(ata_dev_acpi_handle); |
93 | |
94 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
95 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) |
96 | { |
97 | if (dev) |
98 | dev->flags |= ATA_DFLAG_DETACH; |
99 | else { |
100 | struct ata_link *tlink; |
101 | struct ata_device *tdev; |
102 | |
103 | ata_for_each_link(tlink, ap, EDGE) |
104 | ata_for_each_dev(tdev, tlink, ALL) |
105 | tdev->flags |= ATA_DFLAG_DETACH; |
106 | } |
107 | |
108 | ata_port_schedule_eh(ap); |
109 | } |
110 | |
111 | /** |
112 | * ata_acpi_handle_hotplug - ACPI event handler backend |
113 | * @ap: ATA port ACPI event occurred |
114 | * @dev: ATA device ACPI event occurred (can be NULL) |
115 | * @event: ACPI event which occurred |
116 | * |
117 | * All ACPI bay / device realted events end up in this function. If |
118 | * the event is port-wide @dev is NULL. If the event is specific to a |
119 | * device, @dev points to it. |
120 | * |
121 | * Hotplug (as opposed to unplug) notification is always handled as |
122 | * port-wide while unplug only kills the target device on device-wide |
123 | * event. |
124 | * |
125 | * LOCKING: |
126 | * ACPI notify handler context. May sleep. |
127 | */ |
128 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, |
129 | u32 event) |
130 | { |
131 | struct ata_eh_info *ehi = &ap->link.eh_info; |
132 | int wait = 0; |
133 | unsigned long flags; |
134 | |
135 | spin_lock_irqsave(ap->lock, flags); |
136 | /* |
137 | * When dock driver calls into the routine, it will always use |
138 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and |
139 | * ACPI_NOTIFY_EJECT_REQUEST for remove |
140 | */ |
141 | switch (event) { |
142 | case ACPI_NOTIFY_BUS_CHECK: |
143 | case ACPI_NOTIFY_DEVICE_CHECK: |
144 | ata_ehi_push_desc(ehi, "ACPI event"); |
145 | |
146 | ata_ehi_hotplugged(ehi); |
147 | ata_port_freeze(ap); |
148 | break; |
149 | case ACPI_NOTIFY_EJECT_REQUEST: |
150 | ata_ehi_push_desc(ehi, "ACPI event"); |
151 | |
152 | ata_acpi_detach_device(ap, dev); |
153 | wait = 1; |
154 | break; |
155 | } |
156 | |
157 | spin_unlock_irqrestore(ap->lock, flags); |
158 | |
159 | if (wait) |
160 | ata_port_wait_eh(ap); |
161 | } |
162 | |
163 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) |
164 | { |
165 | struct ata_device *dev = data; |
166 | |
167 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
168 | } |
169 | |
170 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) |
171 | { |
172 | struct ata_port *ap = data; |
173 | |
174 | ata_acpi_handle_hotplug(ap, NULL, event); |
175 | } |
176 | |
177 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
178 | u32 event) |
179 | { |
180 | struct kobject *kobj = NULL; |
181 | char event_string[20]; |
182 | char *envp[] = { event_string, NULL }; |
183 | |
184 | if (dev) { |
185 | if (dev->sdev) |
186 | kobj = &dev->sdev->sdev_gendev.kobj; |
187 | } else |
188 | kobj = &ap->dev->kobj; |
189 | |
190 | if (kobj) { |
191 | snprintf(event_string, 20, "BAY_EVENT=%d", event); |
192 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
193 | } |
194 | } |
195 | |
196 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) |
197 | { |
198 | ata_acpi_uevent(data, NULL, event); |
199 | } |
200 | |
201 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) |
202 | { |
203 | struct ata_device *dev = data; |
204 | ata_acpi_uevent(dev->link->ap, dev, event); |
205 | } |
206 | |
207 | static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
208 | .handler = ata_acpi_dev_notify_dock, |
209 | .uevent = ata_acpi_dev_uevent, |
210 | }; |
211 | |
212 | static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
213 | .handler = ata_acpi_ap_notify_dock, |
214 | .uevent = ata_acpi_ap_uevent, |
215 | }; |
216 | |
217 | /** |
218 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects |
219 | * @host: target ATA host |
220 | * |
221 | * This function is called during driver detach after the whole host |
222 | * is shut down. |
223 | * |
224 | * LOCKING: |
225 | * EH context. |
226 | */ |
227 | void ata_acpi_dissociate(struct ata_host *host) |
228 | { |
229 | int i; |
230 | |
231 | /* Restore initial _GTM values so that driver which attaches |
232 | * afterward can use them too. |
233 | */ |
234 | for (i = 0; i < host->n_ports; i++) { |
235 | struct ata_port *ap = host->ports[i]; |
236 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
237 | |
238 | if (ata_ap_acpi_handle(ap) && gtm) |
239 | ata_acpi_stm(ap, gtm); |
240 | } |
241 | } |
242 | |
243 | /** |
244 | * ata_acpi_gtm - execute _GTM |
245 | * @ap: target ATA port |
246 | * @gtm: out parameter for _GTM result |
247 | * |
248 | * Evaluate _GTM and store the result in @gtm. |
249 | * |
250 | * LOCKING: |
251 | * EH context. |
252 | * |
253 | * RETURNS: |
254 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. |
255 | */ |
256 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
257 | { |
258 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; |
259 | union acpi_object *out_obj; |
260 | acpi_status status; |
261 | int rc = 0; |
262 | |
263 | status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_GTM", NULL, |
264 | &output); |
265 | |
266 | rc = -ENOENT; |
267 | if (status == AE_NOT_FOUND) |
268 | goto out_free; |
269 | |
270 | rc = -EINVAL; |
271 | if (ACPI_FAILURE(status)) { |
272 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
273 | status); |
274 | goto out_free; |
275 | } |
276 | |
277 | out_obj = output.pointer; |
278 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
279 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
280 | out_obj->type); |
281 | |
282 | goto out_free; |
283 | } |
284 | |
285 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { |
286 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
287 | out_obj->buffer.length); |
288 | goto out_free; |
289 | } |
290 | |
291 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); |
292 | rc = 0; |
293 | out_free: |
294 | kfree(output.pointer); |
295 | return rc; |
296 | } |
297 | |
298 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
299 | |
300 | /** |
301 | * ata_acpi_stm - execute _STM |
302 | * @ap: target ATA port |
303 | * @stm: timing parameter to _STM |
304 | * |
305 | * Evaluate _STM with timing parameter @stm. |
306 | * |
307 | * LOCKING: |
308 | * EH context. |
309 | * |
310 | * RETURNS: |
311 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. |
312 | */ |
313 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
314 | { |
315 | acpi_status status; |
316 | struct ata_acpi_gtm stm_buf = *stm; |
317 | struct acpi_object_list input; |
318 | union acpi_object in_params[3]; |
319 | |
320 | in_params[0].type = ACPI_TYPE_BUFFER; |
321 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); |
322 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
323 | /* Buffers for id may need byteswapping ? */ |
324 | in_params[1].type = ACPI_TYPE_BUFFER; |
325 | in_params[1].buffer.length = 512; |
326 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
327 | in_params[2].type = ACPI_TYPE_BUFFER; |
328 | in_params[2].buffer.length = 512; |
329 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
330 | |
331 | input.count = 3; |
332 | input.pointer = in_params; |
333 | |
334 | status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input, |
335 | NULL); |
336 | |
337 | if (status == AE_NOT_FOUND) |
338 | return -ENOENT; |
339 | if (ACPI_FAILURE(status)) { |
340 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
341 | status); |
342 | return -EINVAL; |
343 | } |
344 | return 0; |
345 | } |
346 | |
347 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
348 | |
349 | /** |
350 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
351 | * @dev: target ATA device |
352 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
353 | * |
354 | * This applies to both PATA and SATA drives. |
355 | * |
356 | * The _GTF method has no input parameters. |
357 | * It returns a variable number of register set values (registers |
358 | * hex 1F1..1F7, taskfiles). |
359 | * The <variable number> is not known in advance, so have ACPI-CA |
360 | * allocate the buffer as needed and return it, then free it later. |
361 | * |
362 | * LOCKING: |
363 | * EH context. |
364 | * |
365 | * RETURNS: |
366 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
367 | * if _GTF is invalid. |
368 | */ |
369 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
370 | { |
371 | struct ata_port *ap = dev->link->ap; |
372 | acpi_status status; |
373 | struct acpi_buffer output; |
374 | union acpi_object *out_obj; |
375 | int rc = 0; |
376 | |
377 | /* if _GTF is cached, use the cached value */ |
378 | if (dev->gtf_cache) { |
379 | out_obj = dev->gtf_cache; |
380 | goto done; |
381 | } |
382 | |
383 | /* set up output buffer */ |
384 | output.length = ACPI_ALLOCATE_BUFFER; |
385 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
386 | |
387 | if (ata_msg_probe(ap)) |
388 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
389 | __func__, ap->port_no); |
390 | |
391 | /* _GTF has no input parameters */ |
392 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
393 | &output); |
394 | out_obj = dev->gtf_cache = output.pointer; |
395 | |
396 | if (ACPI_FAILURE(status)) { |
397 | if (status != AE_NOT_FOUND) { |
398 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
399 | status); |
400 | rc = -EINVAL; |
401 | } |
402 | goto out_free; |
403 | } |
404 | |
405 | if (!output.length || !output.pointer) { |
406 | if (ata_msg_probe(ap)) |
407 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
408 | __func__, |
409 | (unsigned long long)output.length, |
410 | output.pointer); |
411 | rc = -EINVAL; |
412 | goto out_free; |
413 | } |
414 | |
415 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
416 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
417 | out_obj->type); |
418 | rc = -EINVAL; |
419 | goto out_free; |
420 | } |
421 | |
422 | if (out_obj->buffer.length % REGS_PER_GTF) { |
423 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
424 | out_obj->buffer.length); |
425 | rc = -EINVAL; |
426 | goto out_free; |
427 | } |
428 | |
429 | done: |
430 | rc = out_obj->buffer.length / REGS_PER_GTF; |
431 | if (gtf) { |
432 | *gtf = (void *)out_obj->buffer.pointer; |
433 | if (ata_msg_probe(ap)) |
434 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
435 | __func__, *gtf, rc); |
436 | } |
437 | return rc; |
438 | |
439 | out_free: |
440 | ata_acpi_clear_gtf(dev); |
441 | return rc; |
442 | } |
443 | |
444 | /** |
445 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter |
446 | * @dev: target device |
447 | * @gtm: GTM parameter to use |
448 | * |
449 | * Determine xfermask for @dev from @gtm. |
450 | * |
451 | * LOCKING: |
452 | * None. |
453 | * |
454 | * RETURNS: |
455 | * Determined xfermask. |
456 | */ |
457 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, |
458 | const struct ata_acpi_gtm *gtm) |
459 | { |
460 | unsigned long xfer_mask = 0; |
461 | unsigned int type; |
462 | int unit; |
463 | u8 mode; |
464 | |
465 | /* we always use the 0 slot for crap hardware */ |
466 | unit = dev->devno; |
467 | if (!(gtm->flags & 0x10)) |
468 | unit = 0; |
469 | |
470 | /* PIO */ |
471 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); |
472 | xfer_mask |= ata_xfer_mode2mask(mode); |
473 | |
474 | /* See if we have MWDMA or UDMA data. We don't bother with |
475 | * MWDMA if UDMA is available as this means the BIOS set UDMA |
476 | * and our error changedown if it works is UDMA to PIO anyway. |
477 | */ |
478 | if (!(gtm->flags & (1 << (2 * unit)))) |
479 | type = ATA_SHIFT_MWDMA; |
480 | else |
481 | type = ATA_SHIFT_UDMA; |
482 | |
483 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); |
484 | xfer_mask |= ata_xfer_mode2mask(mode); |
485 | |
486 | return xfer_mask; |
487 | } |
488 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); |
489 | |
490 | /** |
491 | * ata_acpi_cbl_80wire - Check for 80 wire cable |
492 | * @ap: Port to check |
493 | * @gtm: GTM data to use |
494 | * |
495 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
496 | */ |
497 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
498 | { |
499 | struct ata_device *dev; |
500 | |
501 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
502 | unsigned long xfer_mask, udma_mask; |
503 | |
504 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
505 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); |
506 | |
507 | if (udma_mask & ~ATA_UDMA_MASK_40C) |
508 | return 1; |
509 | } |
510 | |
511 | return 0; |
512 | } |
513 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
514 | |
515 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
516 | const struct ata_acpi_gtf *gtf, |
517 | struct ata_taskfile *tf) |
518 | { |
519 | ata_tf_init(dev, tf); |
520 | |
521 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
522 | tf->protocol = ATA_PROT_NODATA; |
523 | tf->feature = gtf->tf[0]; /* 0x1f1 */ |
524 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ |
525 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ |
526 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ |
527 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ |
528 | tf->device = gtf->tf[5]; /* 0x1f6 */ |
529 | tf->command = gtf->tf[6]; /* 0x1f7 */ |
530 | } |
531 | |
532 | static int ata_acpi_filter_tf(struct ata_device *dev, |
533 | const struct ata_taskfile *tf, |
534 | const struct ata_taskfile *ptf) |
535 | { |
536 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
537 | /* libata doesn't use ACPI to configure transfer mode. |
538 | * It will only confuse device configuration. Skip. |
539 | */ |
540 | if (tf->command == ATA_CMD_SET_FEATURES && |
541 | tf->feature == SETFEATURES_XFER) |
542 | return 1; |
543 | } |
544 | |
545 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
546 | /* BIOS writers, sorry but we don't wanna lock |
547 | * features unless the user explicitly said so. |
548 | */ |
549 | |
550 | /* DEVICE CONFIGURATION FREEZE LOCK */ |
551 | if (tf->command == ATA_CMD_CONF_OVERLAY && |
552 | tf->feature == ATA_DCO_FREEZE_LOCK) |
553 | return 1; |
554 | |
555 | /* SECURITY FREEZE LOCK */ |
556 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) |
557 | return 1; |
558 | |
559 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ |
560 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && |
561 | tf->command == ATA_CMD_SET_MAX && |
562 | (tf->feature == ATA_SET_MAX_LOCK || |
563 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) |
564 | return 1; |
565 | } |
566 | |
567 | if (tf->command == ATA_CMD_SET_FEATURES && |
568 | tf->feature == SETFEATURES_SATA_ENABLE) { |
569 | /* inhibit enabling DIPM */ |
570 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
571 | tf->nsect == SATA_DIPM) |
572 | return 1; |
573 | |
574 | /* inhibit FPDMA non-zero offset */ |
575 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
576 | (tf->nsect == SATA_FPDMA_OFFSET || |
577 | tf->nsect == SATA_FPDMA_IN_ORDER)) |
578 | return 1; |
579 | |
580 | /* inhibit FPDMA auto activation */ |
581 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
582 | tf->nsect == SATA_FPDMA_AA) |
583 | return 1; |
584 | } |
585 | |
586 | return 0; |
587 | } |
588 | |
589 | /** |
590 | * ata_acpi_run_tf - send taskfile registers to host controller |
591 | * @dev: target ATA device |
592 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
593 | * |
594 | * Outputs ATA taskfile to standard ATA host controller. |
595 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
596 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
597 | * hob_lbal, hob_lbam, and hob_lbah. |
598 | * |
599 | * This function waits for idle (!BUSY and !DRQ) after writing |
600 | * registers. If the control register has a new value, this |
601 | * function also waits for idle after writing control and before |
602 | * writing the remaining registers. |
603 | * |
604 | * LOCKING: |
605 | * EH context. |
606 | * |
607 | * RETURNS: |
608 | * 1 if command is executed successfully. 0 if ignored, rejected or |
609 | * filtered out, -errno on other errors. |
610 | */ |
611 | static int ata_acpi_run_tf(struct ata_device *dev, |
612 | const struct ata_acpi_gtf *gtf, |
613 | const struct ata_acpi_gtf *prev_gtf) |
614 | { |
615 | struct ata_taskfile *pptf = NULL; |
616 | struct ata_taskfile tf, ptf, rtf; |
617 | unsigned int err_mask; |
618 | const char *level; |
619 | const char *descr; |
620 | char msg[60]; |
621 | int rc; |
622 | |
623 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
624 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) |
625 | && (gtf->tf[6] == 0)) |
626 | return 0; |
627 | |
628 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
629 | if (prev_gtf) { |
630 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); |
631 | pptf = &ptf; |
632 | } |
633 | |
634 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
635 | rtf = tf; |
636 | err_mask = ata_exec_internal(dev, &rtf, NULL, |
637 | DMA_NONE, NULL, 0, 0); |
638 | |
639 | switch (err_mask) { |
640 | case 0: |
641 | level = KERN_DEBUG; |
642 | snprintf(msg, sizeof(msg), "succeeded"); |
643 | rc = 1; |
644 | break; |
645 | |
646 | case AC_ERR_DEV: |
647 | level = KERN_INFO; |
648 | snprintf(msg, sizeof(msg), |
649 | "rejected by device (Stat=0x%02x Err=0x%02x)", |
650 | rtf.command, rtf.feature); |
651 | rc = 0; |
652 | break; |
653 | |
654 | default: |
655 | level = KERN_ERR; |
656 | snprintf(msg, sizeof(msg), |
657 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", |
658 | err_mask, rtf.command, rtf.feature); |
659 | rc = -EIO; |
660 | break; |
661 | } |
662 | } else { |
663 | level = KERN_INFO; |
664 | snprintf(msg, sizeof(msg), "filtered out"); |
665 | rc = 0; |
666 | } |
667 | descr = ata_get_cmd_descript(tf.command); |
668 | |
669 | ata_dev_printk(dev, level, |
670 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
671 | tf.command, tf.feature, tf.nsect, tf.lbal, |
672 | tf.lbam, tf.lbah, tf.device, |
673 | (descr ? descr : "unknown"), msg); |
674 | |
675 | return rc; |
676 | } |
677 | |
678 | /** |
679 | * ata_acpi_exec_tfs - get then write drive taskfile settings |
680 | * @dev: target ATA device |
681 | * @nr_executed: out parameter for the number of executed commands |
682 | * |
683 | * Evaluate _GTF and execute returned taskfiles. |
684 | * |
685 | * LOCKING: |
686 | * EH context. |
687 | * |
688 | * RETURNS: |
689 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
690 | * -errno on other errors. |
691 | */ |
692 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
693 | { |
694 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
695 | int gtf_count, i, rc; |
696 | |
697 | /* get taskfiles */ |
698 | rc = ata_dev_get_GTF(dev, >f); |
699 | if (rc < 0) |
700 | return rc; |
701 | gtf_count = rc; |
702 | |
703 | /* execute them */ |
704 | for (i = 0; i < gtf_count; i++, gtf++) { |
705 | rc = ata_acpi_run_tf(dev, gtf, pgtf); |
706 | if (rc < 0) |
707 | break; |
708 | if (rc) { |
709 | (*nr_executed)++; |
710 | pgtf = gtf; |
711 | } |
712 | } |
713 | |
714 | ata_acpi_clear_gtf(dev); |
715 | |
716 | if (rc < 0) |
717 | return rc; |
718 | return 0; |
719 | } |
720 | |
721 | /** |
722 | * ata_acpi_push_id - send Identify data to drive |
723 | * @dev: target ATA device |
724 | * |
725 | * _SDD ACPI object: for SATA mode only |
726 | * Must be after Identify (Packet) Device -- uses its data |
727 | * ATM this function never returns a failure. It is an optional |
728 | * method and if it fails for whatever reason, we should still |
729 | * just keep going. |
730 | * |
731 | * LOCKING: |
732 | * EH context. |
733 | * |
734 | * RETURNS: |
735 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
736 | */ |
737 | static int ata_acpi_push_id(struct ata_device *dev) |
738 | { |
739 | struct ata_port *ap = dev->link->ap; |
740 | acpi_status status; |
741 | struct acpi_object_list input; |
742 | union acpi_object in_params[1]; |
743 | |
744 | if (ata_msg_probe(ap)) |
745 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
746 | __func__, dev->devno, ap->port_no); |
747 | |
748 | /* Give the drive Identify data to the drive via the _SDD method */ |
749 | /* _SDD: set up input parameters */ |
750 | input.count = 1; |
751 | input.pointer = in_params; |
752 | in_params[0].type = ACPI_TYPE_BUFFER; |
753 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
754 | in_params[0].buffer.pointer = (u8 *)dev->id; |
755 | /* Output buffer: _SDD has no output */ |
756 | |
757 | /* It's OK for _SDD to be missing too. */ |
758 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
759 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
760 | NULL); |
761 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
762 | |
763 | if (status == AE_NOT_FOUND) |
764 | return -ENOENT; |
765 | |
766 | if (ACPI_FAILURE(status)) { |
767 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
768 | return -EIO; |
769 | } |
770 | |
771 | return 0; |
772 | } |
773 | |
774 | /** |
775 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend |
776 | * @ap: target ATA port |
777 | * |
778 | * This function is called when @ap is about to be suspended. All |
779 | * devices are already put to sleep but the port_suspend() callback |
780 | * hasn't been executed yet. Error return from this function aborts |
781 | * suspend. |
782 | * |
783 | * LOCKING: |
784 | * EH context. |
785 | * |
786 | * RETURNS: |
787 | * 0 on success, -errno on failure. |
788 | */ |
789 | int ata_acpi_on_suspend(struct ata_port *ap) |
790 | { |
791 | /* nada */ |
792 | return 0; |
793 | } |
794 | |
795 | /** |
796 | * ata_acpi_on_resume - ATA ACPI hook called on resume |
797 | * @ap: target ATA port |
798 | * |
799 | * This function is called when @ap is resumed - right after port |
800 | * itself is resumed but before any EH action is taken. |
801 | * |
802 | * LOCKING: |
803 | * EH context. |
804 | */ |
805 | void ata_acpi_on_resume(struct ata_port *ap) |
806 | { |
807 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
808 | struct ata_device *dev; |
809 | |
810 | if (ata_ap_acpi_handle(ap) && gtm) { |
811 | /* _GTM valid */ |
812 | |
813 | /* restore timing parameters */ |
814 | ata_acpi_stm(ap, gtm); |
815 | |
816 | /* _GTF should immediately follow _STM so that it can |
817 | * use values set by _STM. Cache _GTF result and |
818 | * schedule _GTF. |
819 | */ |
820 | ata_for_each_dev(dev, &ap->link, ALL) { |
821 | ata_acpi_clear_gtf(dev); |
822 | if (ata_dev_enabled(dev) && |
823 | ata_dev_get_GTF(dev, NULL) >= 0) |
824 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
825 | } |
826 | } else { |
827 | /* SATA _GTF needs to be evaulated after _SDD and |
828 | * there's no reason to evaluate IDE _GTF early |
829 | * without _STM. Clear cache and schedule _GTF. |
830 | */ |
831 | ata_for_each_dev(dev, &ap->link, ALL) { |
832 | ata_acpi_clear_gtf(dev); |
833 | if (ata_dev_enabled(dev)) |
834 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
835 | } |
836 | } |
837 | } |
838 | |
839 | static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) |
840 | { |
841 | int d_max_in = ACPI_STATE_D3_COLD; |
842 | if (!runtime) |
843 | goto out; |
844 | |
845 | /* |
846 | * For ATAPI, runtime D3 cold is only allowed |
847 | * for ZPODD in zero power ready state |
848 | */ |
849 | if (dev->class == ATA_DEV_ATAPI && |
850 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) |
851 | d_max_in = ACPI_STATE_D3_HOT; |
852 | |
853 | out: |
854 | return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev, |
855 | NULL, d_max_in); |
856 | } |
857 | |
858 | static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
859 | { |
860 | bool runtime = PMSG_IS_AUTO(state); |
861 | struct ata_device *dev; |
862 | acpi_handle handle; |
863 | int acpi_state; |
864 | |
865 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
866 | handle = ata_dev_acpi_handle(dev); |
867 | if (!handle) |
868 | continue; |
869 | |
870 | if (!(state.event & PM_EVENT_RESUME)) { |
871 | acpi_state = ata_acpi_choose_suspend_state(dev, runtime); |
872 | if (acpi_state == ACPI_STATE_D0) |
873 | continue; |
874 | if (runtime && zpodd_dev_enabled(dev) && |
875 | acpi_state == ACPI_STATE_D3_COLD) |
876 | zpodd_enable_run_wake(dev); |
877 | acpi_bus_set_power(handle, acpi_state); |
878 | } else { |
879 | if (runtime && zpodd_dev_enabled(dev)) |
880 | zpodd_disable_run_wake(dev); |
881 | acpi_bus_set_power(handle, ACPI_STATE_D0); |
882 | } |
883 | } |
884 | } |
885 | |
886 | /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ |
887 | static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
888 | { |
889 | struct ata_device *dev; |
890 | acpi_handle port_handle; |
891 | |
892 | port_handle = ata_ap_acpi_handle(ap); |
893 | if (!port_handle) |
894 | return; |
895 | |
896 | /* channel first and then drives for power on and vica versa |
897 | for power off */ |
898 | if (state.event & PM_EVENT_RESUME) |
899 | acpi_bus_set_power(port_handle, ACPI_STATE_D0); |
900 | |
901 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
902 | acpi_handle dev_handle = ata_dev_acpi_handle(dev); |
903 | if (!dev_handle) |
904 | continue; |
905 | |
906 | acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? |
907 | ACPI_STATE_D0 : ACPI_STATE_D3); |
908 | } |
909 | |
910 | if (!(state.event & PM_EVENT_RESUME)) |
911 | acpi_bus_set_power(port_handle, ACPI_STATE_D3); |
912 | } |
913 | |
914 | /** |
915 | * ata_acpi_set_state - set the port power state |
916 | * @ap: target ATA port |
917 | * @state: state, on/off |
918 | * |
919 | * This function sets a proper ACPI D state for the device on |
920 | * system and runtime PM operations. |
921 | */ |
922 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
923 | { |
924 | if (ap->flags & ATA_FLAG_ACPI_SATA) |
925 | sata_acpi_set_state(ap, state); |
926 | else |
927 | pata_acpi_set_state(ap, state); |
928 | } |
929 | |
930 | /** |
931 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration |
932 | * @dev: target ATA device |
933 | * |
934 | * This function is called when @dev is about to be configured. |
935 | * IDENTIFY data might have been modified after this hook is run. |
936 | * |
937 | * LOCKING: |
938 | * EH context. |
939 | * |
940 | * RETURNS: |
941 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, |
942 | * -errno on failure. |
943 | */ |
944 | int ata_acpi_on_devcfg(struct ata_device *dev) |
945 | { |
946 | struct ata_port *ap = dev->link->ap; |
947 | struct ata_eh_context *ehc = &ap->link.eh_context; |
948 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
949 | int nr_executed = 0; |
950 | int rc; |
951 | |
952 | if (!ata_dev_acpi_handle(dev)) |
953 | return 0; |
954 | |
955 | /* do we need to do _GTF? */ |
956 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && |
957 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) |
958 | return 0; |
959 | |
960 | /* do _SDD if SATA */ |
961 | if (acpi_sata) { |
962 | rc = ata_acpi_push_id(dev); |
963 | if (rc && rc != -ENOENT) |
964 | goto acpi_err; |
965 | } |
966 | |
967 | /* do _GTF */ |
968 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
969 | if (rc) |
970 | goto acpi_err; |
971 | |
972 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; |
973 | |
974 | /* refresh IDENTIFY page if any _GTF command has been executed */ |
975 | if (nr_executed) { |
976 | rc = ata_dev_reread_id(dev, 0); |
977 | if (rc < 0) { |
978 | ata_dev_err(dev, |
979 | "failed to IDENTIFY after ACPI commands\n"); |
980 | return rc; |
981 | } |
982 | } |
983 | |
984 | return 0; |
985 | |
986 | acpi_err: |
987 | /* ignore evaluation failure if we can continue safely */ |
988 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
989 | return 0; |
990 | |
991 | /* fail and let EH retry once more for unknown IO errors */ |
992 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { |
993 | dev->flags |= ATA_DFLAG_ACPI_FAILED; |
994 | return rc; |
995 | } |
996 | |
997 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
998 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
999 | |
1000 | /* We can safely continue if no _GTF command has been executed |
1001 | * and port is not frozen. |
1002 | */ |
1003 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
1004 | return 0; |
1005 | |
1006 | return rc; |
1007 | } |
1008 | |
1009 | /** |
1010 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled |
1011 | * @dev: target ATA device |
1012 | * |
1013 | * This function is called when @dev is about to be disabled. |
1014 | * |
1015 | * LOCKING: |
1016 | * EH context. |
1017 | */ |
1018 | void ata_acpi_on_disable(struct ata_device *dev) |
1019 | { |
1020 | ata_acpi_clear_gtf(dev); |
1021 | } |
1022 | |
1023 | static void ata_acpi_register_power_resource(struct ata_device *dev) |
1024 | { |
1025 | struct scsi_device *sdev = dev->sdev; |
1026 | acpi_handle handle; |
1027 | |
1028 | handle = ata_dev_acpi_handle(dev); |
1029 | if (handle) |
1030 | acpi_dev_pm_add_dependent(handle, &sdev->sdev_gendev); |
1031 | } |
1032 | |
1033 | static void ata_acpi_unregister_power_resource(struct ata_device *dev) |
1034 | { |
1035 | struct scsi_device *sdev = dev->sdev; |
1036 | acpi_handle handle; |
1037 | |
1038 | handle = ata_dev_acpi_handle(dev); |
1039 | if (handle) |
1040 | acpi_dev_pm_remove_dependent(handle, &sdev->sdev_gendev); |
1041 | } |
1042 | |
1043 | void ata_acpi_bind(struct ata_device *dev) |
1044 | { |
1045 | ata_acpi_register_power_resource(dev); |
1046 | if (zpodd_dev_enabled(dev)) |
1047 | dev_pm_qos_expose_flags(&dev->sdev->sdev_gendev, 0); |
1048 | } |
1049 | |
1050 | void ata_acpi_unbind(struct ata_device *dev) |
1051 | { |
1052 | ata_acpi_unregister_power_resource(dev); |
1053 | } |
1054 | |
1055 | static int compat_pci_ata(struct ata_port *ap) |
1056 | { |
1057 | struct device *dev = ap->tdev.parent; |
1058 | struct pci_dev *pdev; |
1059 | |
1060 | if (!is_pci_dev(dev)) |
1061 | return 0; |
1062 | |
1063 | pdev = to_pci_dev(dev); |
1064 | |
1065 | if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && |
1066 | (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) |
1067 | return 0; |
1068 | |
1069 | return 1; |
1070 | } |
1071 | |
1072 | static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) |
1073 | { |
1074 | if (ap->flags & ATA_FLAG_ACPI_SATA) |
1075 | return -ENODEV; |
1076 | |
1077 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent), |
1078 | ap->port_no); |
1079 | |
1080 | if (!*handle) |
1081 | return -ENODEV; |
1082 | |
1083 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) |
1084 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; |
1085 | |
1086 | return 0; |
1087 | } |
1088 | |
1089 | static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, |
1090 | acpi_handle *handle) |
1091 | { |
1092 | struct ata_device *ata_dev; |
1093 | |
1094 | if (ap->flags & ATA_FLAG_ACPI_SATA) { |
1095 | if (!sata_pmp_attached(ap)) |
1096 | ata_dev = &ap->link.device[sdev->id]; |
1097 | else |
1098 | ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id]; |
1099 | } |
1100 | else { |
1101 | ata_dev = &ap->link.device[sdev->id]; |
1102 | } |
1103 | |
1104 | *handle = ata_dev_acpi_handle(ata_dev); |
1105 | |
1106 | if (!*handle) |
1107 | return -ENODEV; |
1108 | |
1109 | return 0; |
1110 | } |
1111 | |
1112 | static int is_ata_port(const struct device *dev) |
1113 | { |
1114 | return dev->type == &ata_port_type; |
1115 | } |
1116 | |
1117 | static struct ata_port *dev_to_ata_port(struct device *dev) |
1118 | { |
1119 | while (!is_ata_port(dev)) { |
1120 | if (!dev->parent) |
1121 | return NULL; |
1122 | dev = dev->parent; |
1123 | } |
1124 | return to_ata_port(dev); |
1125 | } |
1126 | |
1127 | static int ata_acpi_find_device(struct device *dev, acpi_handle *handle) |
1128 | { |
1129 | struct ata_port *ap = dev_to_ata_port(dev); |
1130 | |
1131 | if (!ap) |
1132 | return -ENODEV; |
1133 | |
1134 | if (!compat_pci_ata(ap)) |
1135 | return -ENODEV; |
1136 | |
1137 | if (scsi_is_host_device(dev)) |
1138 | return ata_acpi_bind_host(ap, handle); |
1139 | else if (scsi_is_sdev_device(dev)) { |
1140 | struct scsi_device *sdev = to_scsi_device(dev); |
1141 | |
1142 | return ata_acpi_bind_device(ap, sdev, handle); |
1143 | } else |
1144 | return -ENODEV; |
1145 | } |
1146 | |
1147 | static struct acpi_bus_type ata_acpi_bus = { |
1148 | .name = "ATA", |
1149 | .find_device = ata_acpi_find_device, |
1150 | }; |
1151 | |
1152 | int ata_acpi_register(void) |
1153 | { |
1154 | return scsi_register_acpi_bus_type(&ata_acpi_bus); |
1155 | } |
1156 | |
1157 | void ata_acpi_unregister(void) |
1158 | { |
1159 | scsi_unregister_acpi_bus_type(&ata_acpi_bus); |
1160 | } |
1161 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9