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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 <scsi/scsi_device.h> | |
21 | #include "libata.h" | |
22 | ||
23 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; | |
24 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); | |
25 | 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)"); | |
26 | ||
27 | #define NO_PORT_MULT 0xffff | |
28 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) | |
29 | ||
30 | #define REGS_PER_GTF 7 | |
31 | struct ata_acpi_gtf { | |
32 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
33 | } __packed; | |
34 | ||
35 | static void ata_acpi_clear_gtf(struct ata_device *dev) | |
36 | { | |
37 | kfree(dev->gtf_cache); | |
38 | dev->gtf_cache = NULL; | |
39 | } | |
40 | ||
41 | struct ata_acpi_hotplug_context { | |
42 | struct acpi_hotplug_context hp; | |
43 | union { | |
44 | struct ata_port *ap; | |
45 | struct ata_device *dev; | |
46 | } data; | |
47 | }; | |
48 | ||
49 | #define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data) | |
50 | ||
51 | /** | |
52 | * ata_dev_acpi_handle - provide the acpi_handle for an ata_device | |
53 | * @dev: the acpi_handle returned will correspond to this device | |
54 | * | |
55 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
56 | * the ata_device passed into the function, or NULL if no such object exists | |
57 | * or ACPI is disabled for this device due to consecutive errors. | |
58 | */ | |
59 | acpi_handle ata_dev_acpi_handle(struct ata_device *dev) | |
60 | { | |
61 | return dev->flags & ATA_DFLAG_ACPI_DISABLED ? | |
62 | NULL : ACPI_HANDLE(&dev->tdev); | |
63 | } | |
64 | ||
65 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ | |
66 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
67 | { | |
68 | if (dev) | |
69 | dev->flags |= ATA_DFLAG_DETACH; | |
70 | else { | |
71 | struct ata_link *tlink; | |
72 | struct ata_device *tdev; | |
73 | ||
74 | ata_for_each_link(tlink, ap, EDGE) | |
75 | ata_for_each_dev(tdev, tlink, ALL) | |
76 | tdev->flags |= ATA_DFLAG_DETACH; | |
77 | } | |
78 | ||
79 | ata_port_schedule_eh(ap); | |
80 | } | |
81 | ||
82 | /** | |
83 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
84 | * @ap: ATA port ACPI event occurred | |
85 | * @dev: ATA device ACPI event occurred (can be NULL) | |
86 | * @event: ACPI event which occurred | |
87 | * | |
88 | * All ACPI bay / device realted events end up in this function. If | |
89 | * the event is port-wide @dev is NULL. If the event is specific to a | |
90 | * device, @dev points to it. | |
91 | * | |
92 | * Hotplug (as opposed to unplug) notification is always handled as | |
93 | * port-wide while unplug only kills the target device on device-wide | |
94 | * event. | |
95 | * | |
96 | * LOCKING: | |
97 | * ACPI notify handler context. May sleep. | |
98 | */ | |
99 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
100 | u32 event) | |
101 | { | |
102 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
103 | int wait = 0; | |
104 | unsigned long flags; | |
105 | ||
106 | spin_lock_irqsave(ap->lock, flags); | |
107 | /* | |
108 | * When dock driver calls into the routine, it will always use | |
109 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
110 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
111 | */ | |
112 | switch (event) { | |
113 | case ACPI_NOTIFY_BUS_CHECK: | |
114 | case ACPI_NOTIFY_DEVICE_CHECK: | |
115 | ata_ehi_push_desc(ehi, "ACPI event"); | |
116 | ||
117 | ata_ehi_hotplugged(ehi); | |
118 | ata_port_freeze(ap); | |
119 | break; | |
120 | case ACPI_NOTIFY_EJECT_REQUEST: | |
121 | ata_ehi_push_desc(ehi, "ACPI event"); | |
122 | ||
123 | ata_acpi_detach_device(ap, dev); | |
124 | wait = 1; | |
125 | break; | |
126 | } | |
127 | ||
128 | spin_unlock_irqrestore(ap->lock, flags); | |
129 | ||
130 | if (wait) | |
131 | ata_port_wait_eh(ap); | |
132 | } | |
133 | ||
134 | static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event) | |
135 | { | |
136 | struct ata_device *dev = ata_hotplug_data(adev->hp).dev; | |
137 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event) | |
142 | { | |
143 | ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, | |
148 | u32 event) | |
149 | { | |
150 | struct kobject *kobj = NULL; | |
151 | char event_string[20]; | |
152 | char *envp[] = { event_string, NULL }; | |
153 | ||
154 | if (dev) { | |
155 | if (dev->sdev) | |
156 | kobj = &dev->sdev->sdev_gendev.kobj; | |
157 | } else | |
158 | kobj = &ap->dev->kobj; | |
159 | ||
160 | if (kobj) { | |
161 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
162 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
163 | } | |
164 | } | |
165 | ||
166 | static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event) | |
167 | { | |
168 | ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event); | |
169 | } | |
170 | ||
171 | static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event) | |
172 | { | |
173 | struct ata_device *dev = ata_hotplug_data(adev->hp).dev; | |
174 | ata_acpi_uevent(dev->link->ap, dev, event); | |
175 | } | |
176 | ||
177 | /* bind acpi handle to pata port */ | |
178 | void ata_acpi_bind_port(struct ata_port *ap) | |
179 | { | |
180 | struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); | |
181 | struct acpi_device *adev; | |
182 | struct ata_acpi_hotplug_context *context; | |
183 | ||
184 | if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion) | |
185 | return; | |
186 | ||
187 | acpi_preset_companion(&ap->tdev, host_companion, ap->port_no); | |
188 | ||
189 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
190 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
191 | ||
192 | adev = ACPI_COMPANION(&ap->tdev); | |
193 | if (!adev || adev->hp) | |
194 | return; | |
195 | ||
196 | context = kzalloc(sizeof(*context), GFP_KERNEL); | |
197 | if (!context) | |
198 | return; | |
199 | ||
200 | context->data.ap = ap; | |
201 | acpi_initialize_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock, | |
202 | ata_acpi_ap_uevent); | |
203 | } | |
204 | ||
205 | void ata_acpi_bind_dev(struct ata_device *dev) | |
206 | { | |
207 | struct ata_port *ap = dev->link->ap; | |
208 | struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev); | |
209 | struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); | |
210 | struct acpi_device *parent, *adev; | |
211 | struct ata_acpi_hotplug_context *context; | |
212 | u64 adr; | |
213 | ||
214 | /* | |
215 | * For both sata/pata devices, host companion device is required. | |
216 | * For pata device, port companion device is also required. | |
217 | */ | |
218 | if (libata_noacpi || !host_companion || | |
219 | (!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_companion)) | |
220 | return; | |
221 | ||
222 | if (ap->flags & ATA_FLAG_ACPI_SATA) { | |
223 | if (!sata_pmp_attached(ap)) | |
224 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
225 | else | |
226 | adr = SATA_ADR(ap->port_no, dev->link->pmp); | |
227 | parent = host_companion; | |
228 | } else { | |
229 | adr = dev->devno; | |
230 | parent = port_companion; | |
231 | } | |
232 | ||
233 | acpi_preset_companion(&dev->tdev, parent, adr); | |
234 | adev = ACPI_COMPANION(&dev->tdev); | |
235 | if (!adev || adev->hp) | |
236 | return; | |
237 | ||
238 | context = kzalloc(sizeof(*context), GFP_KERNEL); | |
239 | if (!context) | |
240 | return; | |
241 | ||
242 | context->data.dev = dev; | |
243 | acpi_initialize_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock, | |
244 | ata_acpi_dev_uevent); | |
245 | } | |
246 | ||
247 | /** | |
248 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
249 | * @host: target ATA host | |
250 | * | |
251 | * This function is called during driver detach after the whole host | |
252 | * is shut down. | |
253 | * | |
254 | * LOCKING: | |
255 | * EH context. | |
256 | */ | |
257 | void ata_acpi_dissociate(struct ata_host *host) | |
258 | { | |
259 | int i; | |
260 | ||
261 | /* Restore initial _GTM values so that driver which attaches | |
262 | * afterward can use them too. | |
263 | */ | |
264 | for (i = 0; i < host->n_ports; i++) { | |
265 | struct ata_port *ap = host->ports[i]; | |
266 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
267 | ||
268 | if (ACPI_HANDLE(&ap->tdev) && gtm) | |
269 | ata_acpi_stm(ap, gtm); | |
270 | } | |
271 | } | |
272 | ||
273 | /** | |
274 | * ata_acpi_gtm - execute _GTM | |
275 | * @ap: target ATA port | |
276 | * @gtm: out parameter for _GTM result | |
277 | * | |
278 | * Evaluate _GTM and store the result in @gtm. | |
279 | * | |
280 | * LOCKING: | |
281 | * EH context. | |
282 | * | |
283 | * RETURNS: | |
284 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
285 | */ | |
286 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
287 | { | |
288 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
289 | union acpi_object *out_obj; | |
290 | acpi_status status; | |
291 | int rc = 0; | |
292 | acpi_handle handle = ACPI_HANDLE(&ap->tdev); | |
293 | ||
294 | if (!handle) | |
295 | return -EINVAL; | |
296 | ||
297 | status = acpi_evaluate_object(handle, "_GTM", NULL, &output); | |
298 | ||
299 | rc = -ENOENT; | |
300 | if (status == AE_NOT_FOUND) | |
301 | goto out_free; | |
302 | ||
303 | rc = -EINVAL; | |
304 | if (ACPI_FAILURE(status)) { | |
305 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", | |
306 | status); | |
307 | goto out_free; | |
308 | } | |
309 | ||
310 | out_obj = output.pointer; | |
311 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
312 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", | |
313 | out_obj->type); | |
314 | ||
315 | goto out_free; | |
316 | } | |
317 | ||
318 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
319 | ata_port_err(ap, "_GTM returned invalid length %d\n", | |
320 | out_obj->buffer.length); | |
321 | goto out_free; | |
322 | } | |
323 | ||
324 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
325 | rc = 0; | |
326 | out_free: | |
327 | kfree(output.pointer); | |
328 | return rc; | |
329 | } | |
330 | ||
331 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); | |
332 | ||
333 | /** | |
334 | * ata_acpi_stm - execute _STM | |
335 | * @ap: target ATA port | |
336 | * @stm: timing parameter to _STM | |
337 | * | |
338 | * Evaluate _STM with timing parameter @stm. | |
339 | * | |
340 | * LOCKING: | |
341 | * EH context. | |
342 | * | |
343 | * RETURNS: | |
344 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
345 | */ | |
346 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) | |
347 | { | |
348 | acpi_status status; | |
349 | struct ata_acpi_gtm stm_buf = *stm; | |
350 | struct acpi_object_list input; | |
351 | union acpi_object in_params[3]; | |
352 | ||
353 | in_params[0].type = ACPI_TYPE_BUFFER; | |
354 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
355 | in_params[0].buffer.pointer = (u8 *)&stm_buf; | |
356 | /* Buffers for id may need byteswapping ? */ | |
357 | in_params[1].type = ACPI_TYPE_BUFFER; | |
358 | in_params[1].buffer.length = 512; | |
359 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; | |
360 | in_params[2].type = ACPI_TYPE_BUFFER; | |
361 | in_params[2].buffer.length = 512; | |
362 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; | |
363 | ||
364 | input.count = 3; | |
365 | input.pointer = in_params; | |
366 | ||
367 | status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM", | |
368 | &input, NULL); | |
369 | ||
370 | if (status == AE_NOT_FOUND) | |
371 | return -ENOENT; | |
372 | if (ACPI_FAILURE(status)) { | |
373 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", | |
374 | status); | |
375 | return -EINVAL; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | EXPORT_SYMBOL_GPL(ata_acpi_stm); | |
381 | ||
382 | /** | |
383 | * ata_dev_get_GTF - get the drive bootup default taskfile settings | |
384 | * @dev: target ATA device | |
385 | * @gtf: output parameter for buffer containing _GTF taskfile arrays | |
386 | * | |
387 | * This applies to both PATA and SATA drives. | |
388 | * | |
389 | * The _GTF method has no input parameters. | |
390 | * It returns a variable number of register set values (registers | |
391 | * hex 1F1..1F7, taskfiles). | |
392 | * The <variable number> is not known in advance, so have ACPI-CA | |
393 | * allocate the buffer as needed and return it, then free it later. | |
394 | * | |
395 | * LOCKING: | |
396 | * EH context. | |
397 | * | |
398 | * RETURNS: | |
399 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL | |
400 | * if _GTF is invalid. | |
401 | */ | |
402 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) | |
403 | { | |
404 | struct ata_port *ap = dev->link->ap; | |
405 | acpi_status status; | |
406 | struct acpi_buffer output; | |
407 | union acpi_object *out_obj; | |
408 | int rc = 0; | |
409 | ||
410 | /* if _GTF is cached, use the cached value */ | |
411 | if (dev->gtf_cache) { | |
412 | out_obj = dev->gtf_cache; | |
413 | goto done; | |
414 | } | |
415 | ||
416 | /* set up output buffer */ | |
417 | output.length = ACPI_ALLOCATE_BUFFER; | |
418 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
419 | ||
420 | if (ata_msg_probe(ap)) | |
421 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", | |
422 | __func__, ap->port_no); | |
423 | ||
424 | /* _GTF has no input parameters */ | |
425 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, | |
426 | &output); | |
427 | out_obj = dev->gtf_cache = output.pointer; | |
428 | ||
429 | if (ACPI_FAILURE(status)) { | |
430 | if (status != AE_NOT_FOUND) { | |
431 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", | |
432 | status); | |
433 | rc = -EINVAL; | |
434 | } | |
435 | goto out_free; | |
436 | } | |
437 | ||
438 | if (!output.length || !output.pointer) { | |
439 | if (ata_msg_probe(ap)) | |
440 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", | |
441 | __func__, | |
442 | (unsigned long long)output.length, | |
443 | output.pointer); | |
444 | rc = -EINVAL; | |
445 | goto out_free; | |
446 | } | |
447 | ||
448 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
449 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", | |
450 | out_obj->type); | |
451 | rc = -EINVAL; | |
452 | goto out_free; | |
453 | } | |
454 | ||
455 | if (out_obj->buffer.length % REGS_PER_GTF) { | |
456 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", | |
457 | out_obj->buffer.length); | |
458 | rc = -EINVAL; | |
459 | goto out_free; | |
460 | } | |
461 | ||
462 | done: | |
463 | rc = out_obj->buffer.length / REGS_PER_GTF; | |
464 | if (gtf) { | |
465 | *gtf = (void *)out_obj->buffer.pointer; | |
466 | if (ata_msg_probe(ap)) | |
467 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", | |
468 | __func__, *gtf, rc); | |
469 | } | |
470 | return rc; | |
471 | ||
472 | out_free: | |
473 | ata_acpi_clear_gtf(dev); | |
474 | return rc; | |
475 | } | |
476 | ||
477 | /** | |
478 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
479 | * @dev: target device | |
480 | * @gtm: GTM parameter to use | |
481 | * | |
482 | * Determine xfermask for @dev from @gtm. | |
483 | * | |
484 | * LOCKING: | |
485 | * None. | |
486 | * | |
487 | * RETURNS: | |
488 | * Determined xfermask. | |
489 | */ | |
490 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
491 | const struct ata_acpi_gtm *gtm) | |
492 | { | |
493 | unsigned long xfer_mask = 0; | |
494 | unsigned int type; | |
495 | int unit; | |
496 | u8 mode; | |
497 | ||
498 | /* we always use the 0 slot for crap hardware */ | |
499 | unit = dev->devno; | |
500 | if (!(gtm->flags & 0x10)) | |
501 | unit = 0; | |
502 | ||
503 | /* PIO */ | |
504 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
505 | xfer_mask |= ata_xfer_mode2mask(mode); | |
506 | ||
507 | /* See if we have MWDMA or UDMA data. We don't bother with | |
508 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
509 | * and our error changedown if it works is UDMA to PIO anyway. | |
510 | */ | |
511 | if (!(gtm->flags & (1 << (2 * unit)))) | |
512 | type = ATA_SHIFT_MWDMA; | |
513 | else | |
514 | type = ATA_SHIFT_UDMA; | |
515 | ||
516 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
517 | xfer_mask |= ata_xfer_mode2mask(mode); | |
518 | ||
519 | return xfer_mask; | |
520 | } | |
521 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
522 | ||
523 | /** | |
524 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
525 | * @ap: Port to check | |
526 | * @gtm: GTM data to use | |
527 | * | |
528 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. | |
529 | */ | |
530 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) | |
531 | { | |
532 | struct ata_device *dev; | |
533 | ||
534 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
535 | unsigned long xfer_mask, udma_mask; | |
536 | ||
537 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); | |
538 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
539 | ||
540 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
541 | return 1; | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); | |
547 | ||
548 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, | |
549 | const struct ata_acpi_gtf *gtf, | |
550 | struct ata_taskfile *tf) | |
551 | { | |
552 | ata_tf_init(dev, tf); | |
553 | ||
554 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
555 | tf->protocol = ATA_PROT_NODATA; | |
556 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
557 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
558 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
559 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
560 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
561 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
562 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
563 | } | |
564 | ||
565 | static int ata_acpi_filter_tf(struct ata_device *dev, | |
566 | const struct ata_taskfile *tf, | |
567 | const struct ata_taskfile *ptf) | |
568 | { | |
569 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
570 | /* libata doesn't use ACPI to configure transfer mode. | |
571 | * It will only confuse device configuration. Skip. | |
572 | */ | |
573 | if (tf->command == ATA_CMD_SET_FEATURES && | |
574 | tf->feature == SETFEATURES_XFER) | |
575 | return 1; | |
576 | } | |
577 | ||
578 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
579 | /* BIOS writers, sorry but we don't wanna lock | |
580 | * features unless the user explicitly said so. | |
581 | */ | |
582 | ||
583 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
584 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
585 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
586 | return 1; | |
587 | ||
588 | /* SECURITY FREEZE LOCK */ | |
589 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
590 | return 1; | |
591 | ||
592 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
593 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
594 | tf->command == ATA_CMD_SET_MAX && | |
595 | (tf->feature == ATA_SET_MAX_LOCK || | |
596 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
597 | return 1; | |
598 | } | |
599 | ||
600 | if (tf->command == ATA_CMD_SET_FEATURES && | |
601 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
602 | /* inhibit enabling DIPM */ | |
603 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && | |
604 | tf->nsect == SATA_DIPM) | |
605 | return 1; | |
606 | ||
607 | /* inhibit FPDMA non-zero offset */ | |
608 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && | |
609 | (tf->nsect == SATA_FPDMA_OFFSET || | |
610 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
611 | return 1; | |
612 | ||
613 | /* inhibit FPDMA auto activation */ | |
614 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && | |
615 | tf->nsect == SATA_FPDMA_AA) | |
616 | return 1; | |
617 | } | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | /** | |
623 | * ata_acpi_run_tf - send taskfile registers to host controller | |
624 | * @dev: target ATA device | |
625 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
626 | * | |
627 | * Outputs ATA taskfile to standard ATA host controller. | |
628 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
629 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
630 | * hob_lbal, hob_lbam, and hob_lbah. | |
631 | * | |
632 | * This function waits for idle (!BUSY and !DRQ) after writing | |
633 | * registers. If the control register has a new value, this | |
634 | * function also waits for idle after writing control and before | |
635 | * writing the remaining registers. | |
636 | * | |
637 | * LOCKING: | |
638 | * EH context. | |
639 | * | |
640 | * RETURNS: | |
641 | * 1 if command is executed successfully. 0 if ignored, rejected or | |
642 | * filtered out, -errno on other errors. | |
643 | */ | |
644 | static int ata_acpi_run_tf(struct ata_device *dev, | |
645 | const struct ata_acpi_gtf *gtf, | |
646 | const struct ata_acpi_gtf *prev_gtf) | |
647 | { | |
648 | struct ata_taskfile *pptf = NULL; | |
649 | struct ata_taskfile tf, ptf, rtf; | |
650 | unsigned int err_mask; | |
651 | const char *level; | |
652 | const char *descr; | |
653 | char msg[60]; | |
654 | int rc; | |
655 | ||
656 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) | |
657 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
658 | && (gtf->tf[6] == 0)) | |
659 | return 0; | |
660 | ||
661 | ata_acpi_gtf_to_tf(dev, gtf, &tf); | |
662 | if (prev_gtf) { | |
663 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
664 | pptf = &ptf; | |
665 | } | |
666 | ||
667 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { | |
668 | rtf = tf; | |
669 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
670 | DMA_NONE, NULL, 0, 0); | |
671 | ||
672 | switch (err_mask) { | |
673 | case 0: | |
674 | level = KERN_DEBUG; | |
675 | snprintf(msg, sizeof(msg), "succeeded"); | |
676 | rc = 1; | |
677 | break; | |
678 | ||
679 | case AC_ERR_DEV: | |
680 | level = KERN_INFO; | |
681 | snprintf(msg, sizeof(msg), | |
682 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
683 | rtf.command, rtf.feature); | |
684 | rc = 0; | |
685 | break; | |
686 | ||
687 | default: | |
688 | level = KERN_ERR; | |
689 | snprintf(msg, sizeof(msg), | |
690 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
691 | err_mask, rtf.command, rtf.feature); | |
692 | rc = -EIO; | |
693 | break; | |
694 | } | |
695 | } else { | |
696 | level = KERN_INFO; | |
697 | snprintf(msg, sizeof(msg), "filtered out"); | |
698 | rc = 0; | |
699 | } | |
700 | descr = ata_get_cmd_descript(tf.command); | |
701 | ||
702 | ata_dev_printk(dev, level, | |
703 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", | |
704 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
705 | tf.lbam, tf.lbah, tf.device, | |
706 | (descr ? descr : "unknown"), msg); | |
707 | ||
708 | return rc; | |
709 | } | |
710 | ||
711 | /** | |
712 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
713 | * @dev: target ATA device | |
714 | * @nr_executed: out parameter for the number of executed commands | |
715 | * | |
716 | * Evaluate _GTF and execute returned taskfiles. | |
717 | * | |
718 | * LOCKING: | |
719 | * EH context. | |
720 | * | |
721 | * RETURNS: | |
722 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. | |
723 | * -errno on other errors. | |
724 | */ | |
725 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) | |
726 | { | |
727 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; | |
728 | int gtf_count, i, rc; | |
729 | ||
730 | /* get taskfiles */ | |
731 | rc = ata_dev_get_GTF(dev, >f); | |
732 | if (rc < 0) | |
733 | return rc; | |
734 | gtf_count = rc; | |
735 | ||
736 | /* execute them */ | |
737 | for (i = 0; i < gtf_count; i++, gtf++) { | |
738 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
739 | if (rc < 0) | |
740 | break; | |
741 | if (rc) { | |
742 | (*nr_executed)++; | |
743 | pgtf = gtf; | |
744 | } | |
745 | } | |
746 | ||
747 | ata_acpi_clear_gtf(dev); | |
748 | ||
749 | if (rc < 0) | |
750 | return rc; | |
751 | return 0; | |
752 | } | |
753 | ||
754 | /** | |
755 | * ata_acpi_push_id - send Identify data to drive | |
756 | * @dev: target ATA device | |
757 | * | |
758 | * _SDD ACPI object: for SATA mode only | |
759 | * Must be after Identify (Packet) Device -- uses its data | |
760 | * ATM this function never returns a failure. It is an optional | |
761 | * method and if it fails for whatever reason, we should still | |
762 | * just keep going. | |
763 | * | |
764 | * LOCKING: | |
765 | * EH context. | |
766 | * | |
767 | * RETURNS: | |
768 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. | |
769 | */ | |
770 | static int ata_acpi_push_id(struct ata_device *dev) | |
771 | { | |
772 | struct ata_port *ap = dev->link->ap; | |
773 | acpi_status status; | |
774 | struct acpi_object_list input; | |
775 | union acpi_object in_params[1]; | |
776 | ||
777 | if (ata_msg_probe(ap)) | |
778 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", | |
779 | __func__, dev->devno, ap->port_no); | |
780 | ||
781 | /* Give the drive Identify data to the drive via the _SDD method */ | |
782 | /* _SDD: set up input parameters */ | |
783 | input.count = 1; | |
784 | input.pointer = in_params; | |
785 | in_params[0].type = ACPI_TYPE_BUFFER; | |
786 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; | |
787 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
788 | /* Output buffer: _SDD has no output */ | |
789 | ||
790 | /* It's OK for _SDD to be missing too. */ | |
791 | swap_buf_le16(dev->id, ATA_ID_WORDS); | |
792 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, | |
793 | NULL); | |
794 | swap_buf_le16(dev->id, ATA_ID_WORDS); | |
795 | ||
796 | if (status == AE_NOT_FOUND) | |
797 | return -ENOENT; | |
798 | ||
799 | if (ACPI_FAILURE(status)) { | |
800 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); | |
801 | return -EIO; | |
802 | } | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | /** | |
808 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
809 | * @ap: target ATA port | |
810 | * | |
811 | * This function is called when @ap is about to be suspended. All | |
812 | * devices are already put to sleep but the port_suspend() callback | |
813 | * hasn't been executed yet. Error return from this function aborts | |
814 | * suspend. | |
815 | * | |
816 | * LOCKING: | |
817 | * EH context. | |
818 | * | |
819 | * RETURNS: | |
820 | * 0 on success, -errno on failure. | |
821 | */ | |
822 | int ata_acpi_on_suspend(struct ata_port *ap) | |
823 | { | |
824 | /* nada */ | |
825 | return 0; | |
826 | } | |
827 | ||
828 | /** | |
829 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
830 | * @ap: target ATA port | |
831 | * | |
832 | * This function is called when @ap is resumed - right after port | |
833 | * itself is resumed but before any EH action is taken. | |
834 | * | |
835 | * LOCKING: | |
836 | * EH context. | |
837 | */ | |
838 | void ata_acpi_on_resume(struct ata_port *ap) | |
839 | { | |
840 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
841 | struct ata_device *dev; | |
842 | ||
843 | if (ACPI_HANDLE(&ap->tdev) && gtm) { | |
844 | /* _GTM valid */ | |
845 | ||
846 | /* restore timing parameters */ | |
847 | ata_acpi_stm(ap, gtm); | |
848 | ||
849 | /* _GTF should immediately follow _STM so that it can | |
850 | * use values set by _STM. Cache _GTF result and | |
851 | * schedule _GTF. | |
852 | */ | |
853 | ata_for_each_dev(dev, &ap->link, ALL) { | |
854 | ata_acpi_clear_gtf(dev); | |
855 | if (ata_dev_enabled(dev) && | |
856 | ata_dev_acpi_handle(dev) && | |
857 | ata_dev_get_GTF(dev, NULL) >= 0) | |
858 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
859 | } | |
860 | } else { | |
861 | /* SATA _GTF needs to be evaulated after _SDD and | |
862 | * there's no reason to evaluate IDE _GTF early | |
863 | * without _STM. Clear cache and schedule _GTF. | |
864 | */ | |
865 | ata_for_each_dev(dev, &ap->link, ALL) { | |
866 | ata_acpi_clear_gtf(dev); | |
867 | if (ata_dev_enabled(dev)) | |
868 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
869 | } | |
870 | } | |
871 | } | |
872 | ||
873 | static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) | |
874 | { | |
875 | int d_max_in = ACPI_STATE_D3_COLD; | |
876 | if (!runtime) | |
877 | goto out; | |
878 | ||
879 | /* | |
880 | * For ATAPI, runtime D3 cold is only allowed | |
881 | * for ZPODD in zero power ready state | |
882 | */ | |
883 | if (dev->class == ATA_DEV_ATAPI && | |
884 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) | |
885 | d_max_in = ACPI_STATE_D3_HOT; | |
886 | ||
887 | out: | |
888 | return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in); | |
889 | } | |
890 | ||
891 | static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
892 | { | |
893 | bool runtime = PMSG_IS_AUTO(state); | |
894 | struct ata_device *dev; | |
895 | acpi_handle handle; | |
896 | int acpi_state; | |
897 | ||
898 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
899 | handle = ata_dev_acpi_handle(dev); | |
900 | if (!handle) | |
901 | continue; | |
902 | ||
903 | if (!(state.event & PM_EVENT_RESUME)) { | |
904 | acpi_state = ata_acpi_choose_suspend_state(dev, runtime); | |
905 | if (acpi_state == ACPI_STATE_D0) | |
906 | continue; | |
907 | if (runtime && zpodd_dev_enabled(dev) && | |
908 | acpi_state == ACPI_STATE_D3_COLD) | |
909 | zpodd_enable_run_wake(dev); | |
910 | acpi_bus_set_power(handle, acpi_state); | |
911 | } else { | |
912 | if (runtime && zpodd_dev_enabled(dev)) | |
913 | zpodd_disable_run_wake(dev); | |
914 | acpi_bus_set_power(handle, ACPI_STATE_D0); | |
915 | } | |
916 | } | |
917 | } | |
918 | ||
919 | /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ | |
920 | static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
921 | { | |
922 | struct ata_device *dev; | |
923 | acpi_handle port_handle; | |
924 | ||
925 | port_handle = ACPI_HANDLE(&ap->tdev); | |
926 | if (!port_handle) | |
927 | return; | |
928 | ||
929 | /* channel first and then drives for power on and vica versa | |
930 | for power off */ | |
931 | if (state.event & PM_EVENT_RESUME) | |
932 | acpi_bus_set_power(port_handle, ACPI_STATE_D0); | |
933 | ||
934 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
935 | acpi_handle dev_handle = ata_dev_acpi_handle(dev); | |
936 | if (!dev_handle) | |
937 | continue; | |
938 | ||
939 | acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? | |
940 | ACPI_STATE_D0 : ACPI_STATE_D3_COLD); | |
941 | } | |
942 | ||
943 | if (!(state.event & PM_EVENT_RESUME)) | |
944 | acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD); | |
945 | } | |
946 | ||
947 | /** | |
948 | * ata_acpi_set_state - set the port power state | |
949 | * @ap: target ATA port | |
950 | * @state: state, on/off | |
951 | * | |
952 | * This function sets a proper ACPI D state for the device on | |
953 | * system and runtime PM operations. | |
954 | */ | |
955 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
956 | { | |
957 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
958 | sata_acpi_set_state(ap, state); | |
959 | else | |
960 | pata_acpi_set_state(ap, state); | |
961 | } | |
962 | ||
963 | /** | |
964 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
965 | * @dev: target ATA device | |
966 | * | |
967 | * This function is called when @dev is about to be configured. | |
968 | * IDENTIFY data might have been modified after this hook is run. | |
969 | * | |
970 | * LOCKING: | |
971 | * EH context. | |
972 | * | |
973 | * RETURNS: | |
974 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
975 | * -errno on failure. | |
976 | */ | |
977 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
978 | { | |
979 | struct ata_port *ap = dev->link->ap; | |
980 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
981 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; | |
982 | int nr_executed = 0; | |
983 | int rc; | |
984 | ||
985 | if (!ata_dev_acpi_handle(dev)) | |
986 | return 0; | |
987 | ||
988 | /* do we need to do _GTF? */ | |
989 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
990 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
991 | return 0; | |
992 | ||
993 | /* do _SDD if SATA */ | |
994 | if (acpi_sata) { | |
995 | rc = ata_acpi_push_id(dev); | |
996 | if (rc && rc != -ENOENT) | |
997 | goto acpi_err; | |
998 | } | |
999 | ||
1000 | /* do _GTF */ | |
1001 | rc = ata_acpi_exec_tfs(dev, &nr_executed); | |
1002 | if (rc) | |
1003 | goto acpi_err; | |
1004 | ||
1005 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
1006 | ||
1007 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
1008 | if (nr_executed) { | |
1009 | rc = ata_dev_reread_id(dev, 0); | |
1010 | if (rc < 0) { | |
1011 | ata_dev_err(dev, | |
1012 | "failed to IDENTIFY after ACPI commands\n"); | |
1013 | return rc; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | ||
1019 | acpi_err: | |
1020 | /* ignore evaluation failure if we can continue safely */ | |
1021 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1022 | return 0; | |
1023 | ||
1024 | /* fail and let EH retry once more for unknown IO errors */ | |
1025 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1026 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1027 | return rc; | |
1028 | } | |
1029 | ||
1030 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; | |
1031 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); | |
1032 | ||
1033 | /* We can safely continue if no _GTF command has been executed | |
1034 | * and port is not frozen. | |
1035 | */ | |
1036 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1037 | return 0; | |
1038 | ||
1039 | return rc; | |
1040 | } | |
1041 | ||
1042 | /** | |
1043 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1044 | * @dev: target ATA device | |
1045 | * | |
1046 | * This function is called when @dev is about to be disabled. | |
1047 | * | |
1048 | * LOCKING: | |
1049 | * EH context. | |
1050 | */ | |
1051 | void ata_acpi_on_disable(struct ata_device *dev) | |
1052 | { | |
1053 | ata_acpi_clear_gtf(dev); | |
1054 | } |