Commit | Line | Data |
---|---|---|
11ef697b KCA |
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 | ||
3264a8d8 | 9 | #include <linux/module.h> |
11ef697b KCA |
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> | |
237d8440 | 18 | #include <scsi/scsi_device.h> |
11ef697b KCA |
19 | #include "libata.h" |
20 | ||
21 | #include <acpi/acpi_bus.h> | |
22 | #include <acpi/acnames.h> | |
23 | #include <acpi/acnamesp.h> | |
24 | #include <acpi/acparser.h> | |
25 | #include <acpi/acexcep.h> | |
26 | #include <acpi/acmacros.h> | |
27 | #include <acpi/actypes.h> | |
28 | ||
3264a8d8 TH |
29 | enum { |
30 | ATA_ACPI_FILTER_SETXFER = 1 << 0, | |
31 | ATA_ACPI_FILTER_LOCK = 1 << 1, | |
32 | ||
33 | ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | | |
34 | ATA_ACPI_FILTER_LOCK, | |
35 | }; | |
36 | ||
37 | static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; | |
38 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); | |
39 | MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)"); | |
40 | ||
11ef697b | 41 | #define NO_PORT_MULT 0xffff |
2dcb407e | 42 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
43 | |
44 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
45 | struct ata_acpi_gtf { |
46 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
47 | } __packed; | |
11ef697b | 48 | |
ca426635 AC |
49 | /* |
50 | * Helper - belongs in the PCI layer somewhere eventually | |
51 | */ | |
52 | static int is_pci_dev(struct device *dev) | |
53 | { | |
54 | return (dev->bus == &pci_bus_type); | |
55 | } | |
11ef697b | 56 | |
398e0782 TH |
57 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
58 | { | |
59 | kfree(dev->gtf_cache); | |
60 | dev->gtf_cache = NULL; | |
61 | } | |
62 | ||
d0df8b5d TH |
63 | /** |
64 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
65 | * @ap: target SATA port | |
66 | * | |
67 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
68 | * fields of @ap, the port and devices accordingly. | |
69 | * | |
70 | * LOCKING: | |
71 | * EH context. | |
72 | * | |
73 | * RETURNS: | |
74 | * 0 on success, -errno on failure. | |
75 | */ | |
76 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 77 | { |
d0df8b5d TH |
78 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
79 | ||
071f44b1 | 80 | if (!sata_pmp_attached(ap)) { |
d0df8b5d TH |
81 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
82 | ||
83 | ap->link.device->acpi_handle = | |
84 | acpi_get_child(ap->host->acpi_handle, adr); | |
85 | } else { | |
86 | struct ata_link *link; | |
87 | ||
88 | ap->link.device->acpi_handle = NULL; | |
89 | ||
90 | ata_port_for_each_link(link, ap) { | |
91 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); | |
fafbae87 | 92 | |
d0df8b5d TH |
93 | link->device->acpi_handle = |
94 | acpi_get_child(ap->host->acpi_handle, adr); | |
95 | } | |
96 | } | |
11ef697b KCA |
97 | } |
98 | ||
fafbae87 | 99 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 100 | { |
fafbae87 | 101 | int max_devices, i; |
11ef697b | 102 | |
fafbae87 TH |
103 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
104 | if (!ap->acpi_handle) | |
105 | return; | |
11ef697b | 106 | |
fafbae87 TH |
107 | max_devices = 1; |
108 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
109 | max_devices++; | |
11ef697b | 110 | |
fafbae87 | 111 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 112 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 113 | |
fafbae87 | 114 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 115 | } |
c05e6ff0 TH |
116 | |
117 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
118 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
119 | } |
120 | ||
664d080c HM |
121 | static void ata_acpi_eject_device(acpi_handle handle) |
122 | { | |
123 | struct acpi_object_list arg_list; | |
124 | union acpi_object arg; | |
125 | ||
126 | arg_list.count = 1; | |
127 | arg_list.pointer = &arg; | |
128 | arg.type = ACPI_TYPE_INTEGER; | |
129 | arg.integer.value = 1; | |
130 | ||
131 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0", | |
132 | &arg_list, NULL))) | |
133 | printk(KERN_ERR "Failed to evaluate _EJ0!\n"); | |
134 | } | |
135 | ||
136 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ | |
137 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
138 | { | |
139 | if (dev) | |
140 | dev->flags |= ATA_DFLAG_DETACH; | |
141 | else { | |
142 | struct ata_link *tlink; | |
143 | struct ata_device *tdev; | |
144 | ||
145 | ata_port_for_each_link(tlink, ap) | |
146 | ata_link_for_each_dev(tdev, tlink) | |
147 | tdev->flags |= ATA_DFLAG_DETACH; | |
148 | } | |
149 | ||
150 | ata_port_schedule_eh(ap); | |
151 | } | |
152 | ||
153 | /** | |
154 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
155 | * @ap: ATA port ACPI event occurred | |
156 | * @dev: ATA device ACPI event occurred (can be NULL) | |
157 | * @event: ACPI event which occurred | |
158 | * @is_dock_event: boolean indicating whether the event was a dock one | |
159 | * | |
160 | * All ACPI bay / device realted events end up in this function. If | |
161 | * the event is port-wide @dev is NULL. If the event is specific to a | |
162 | * device, @dev points to it. | |
163 | * | |
164 | * Hotplug (as opposed to unplug) notification is always handled as | |
165 | * port-wide while unplug only kills the target device on device-wide | |
166 | * event. | |
167 | * | |
168 | * LOCKING: | |
169 | * ACPI notify handler context. May sleep. | |
170 | */ | |
171 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
172 | u32 event, int is_dock_event) | |
237d8440 MG |
173 | { |
174 | char event_string[12]; | |
175 | char *envp[] = { event_string, NULL }; | |
664d080c | 176 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
177 | struct kobject *kobj = NULL; |
178 | int wait = 0; | |
179 | unsigned long flags; | |
ae6c23c4 MG |
180 | acpi_handle handle, tmphandle; |
181 | unsigned long sta; | |
182 | acpi_status status; | |
c85665ff | 183 | |
664d080c HM |
184 | if (dev) { |
185 | if (dev->sdev) | |
186 | kobj = &dev->sdev->sdev_gendev.kobj; | |
ae6c23c4 | 187 | handle = dev->acpi_handle; |
664d080c HM |
188 | } else { |
189 | kobj = &ap->dev->kobj; | |
ae6c23c4 | 190 | handle = ap->acpi_handle; |
664d080c | 191 | } |
ae6c23c4 MG |
192 | |
193 | status = acpi_get_handle(handle, "_EJ0", &tmphandle); | |
664d080c HM |
194 | if (ACPI_FAILURE(status)) |
195 | /* This device does not support hotplug */ | |
ae6c23c4 | 196 | return; |
ae6c23c4 | 197 | |
664d080c | 198 | spin_lock_irqsave(ap->lock, flags); |
ae6c23c4 | 199 | |
233f1120 TH |
200 | switch (event) { |
201 | case ACPI_NOTIFY_BUS_CHECK: | |
202 | case ACPI_NOTIFY_DEVICE_CHECK: | |
203 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c HM |
204 | |
205 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
206 | if (ACPI_FAILURE(status)) { | |
207 | ata_port_printk(ap, KERN_ERR, | |
208 | "acpi: failed to determine bay status (0x%x)\n", | |
209 | status); | |
210 | break; | |
211 | } | |
212 | ||
213 | if (sta) { | |
ae6c23c4 MG |
214 | ata_ehi_hotplugged(ehi); |
215 | ata_port_freeze(ap); | |
664d080c HM |
216 | } else { |
217 | /* The device has gone - unplug it */ | |
218 | ata_acpi_detach_device(ap, dev); | |
219 | wait = 1; | |
233f1120 | 220 | } |
664d080c HM |
221 | break; |
222 | case ACPI_NOTIFY_EJECT_REQUEST: | |
223 | ata_ehi_push_desc(ehi, "ACPI event"); | |
224 | ||
225 | if (!is_dock_event) | |
226 | break; | |
227 | ||
228 | /* undock event - immediate unplug */ | |
229 | ata_acpi_detach_device(ap, dev); | |
230 | wait = 1; | |
231 | break; | |
237d8440 MG |
232 | } |
233 | ||
664d080c HM |
234 | /* make sure kobj doesn't go away while ap->lock is released */ |
235 | kobject_get(kobj); | |
236 | ||
ae6c23c4 MG |
237 | spin_unlock_irqrestore(ap->lock, flags); |
238 | ||
664d080c | 239 | if (wait) { |
ae6c23c4 | 240 | ata_port_wait_eh(ap); |
664d080c HM |
241 | ata_acpi_eject_device(handle); |
242 | } | |
ae6c23c4 | 243 | |
664d080c | 244 | if (kobj && !is_dock_event) { |
2dcb407e | 245 | sprintf(event_string, "BAY_EVENT=%d", event); |
237d8440 MG |
246 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
247 | } | |
664d080c HM |
248 | |
249 | kobject_put(kobj); | |
250 | } | |
251 | ||
252 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
253 | { | |
254 | struct ata_device *dev = data; | |
255 | ||
256 | ata_acpi_handle_hotplug(dev->link->ap, dev, event, 1); | |
257 | } | |
258 | ||
259 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
260 | { | |
261 | struct ata_port *ap = data; | |
262 | ||
263 | ata_acpi_handle_hotplug(ap, NULL, event, 1); | |
237d8440 MG |
264 | } |
265 | ||
266 | static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data) | |
267 | { | |
268 | struct ata_device *dev = data; | |
237d8440 | 269 | |
664d080c | 270 | ata_acpi_handle_hotplug(dev->link->ap, dev, event, 0); |
237d8440 MG |
271 | } |
272 | ||
273 | static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data) | |
274 | { | |
275 | struct ata_port *ap = data; | |
276 | ||
664d080c | 277 | ata_acpi_handle_hotplug(ap, NULL, event, 0); |
237d8440 MG |
278 | } |
279 | ||
fafbae87 TH |
280 | /** |
281 | * ata_acpi_associate - associate ATA host with ACPI objects | |
282 | * @host: target ATA host | |
283 | * | |
284 | * Look up ACPI objects associated with @host and initialize | |
285 | * acpi_handle fields of @host, its ports and devices accordingly. | |
286 | * | |
287 | * LOCKING: | |
288 | * EH context. | |
289 | * | |
290 | * RETURNS: | |
291 | * 0 on success, -errno on failure. | |
292 | */ | |
293 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 294 | { |
237d8440 | 295 | int i, j; |
11ef697b | 296 | |
fafbae87 TH |
297 | if (!is_pci_dev(host->dev) || libata_noacpi) |
298 | return; | |
11ef697b | 299 | |
fafbae87 TH |
300 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
301 | if (!host->acpi_handle) | |
302 | return; | |
11ef697b | 303 | |
fafbae87 TH |
304 | for (i = 0; i < host->n_ports; i++) { |
305 | struct ata_port *ap = host->ports[i]; | |
306 | ||
307 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
308 | ata_acpi_associate_sata_port(ap); | |
309 | else | |
310 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 311 | |
233f1120 TH |
312 | if (ap->acpi_handle) { |
313 | acpi_install_notify_handler(ap->acpi_handle, | |
314 | ACPI_SYSTEM_NOTIFY, | |
315 | ata_acpi_ap_notify, ap); | |
233f1120 TH |
316 | /* we might be on a docking station */ |
317 | register_hotplug_dock_device(ap->acpi_handle, | |
664d080c | 318 | ata_acpi_ap_notify_dock, ap); |
233f1120 | 319 | } |
237d8440 MG |
320 | |
321 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
322 | struct ata_device *dev = &ap->link.device[j]; | |
323 | ||
233f1120 TH |
324 | if (dev->acpi_handle) { |
325 | acpi_install_notify_handler(dev->acpi_handle, | |
326 | ACPI_SYSTEM_NOTIFY, | |
327 | ata_acpi_dev_notify, dev); | |
233f1120 TH |
328 | /* we might be on a docking station */ |
329 | register_hotplug_dock_device(dev->acpi_handle, | |
664d080c | 330 | ata_acpi_dev_notify_dock, dev); |
233f1120 | 331 | } |
237d8440 | 332 | } |
11ef697b | 333 | } |
11ef697b KCA |
334 | } |
335 | ||
562f0c2d TH |
336 | /** |
337 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
338 | * @host: target ATA host | |
339 | * | |
340 | * This function is called during driver detach after the whole host | |
341 | * is shut down. | |
342 | * | |
343 | * LOCKING: | |
344 | * EH context. | |
345 | */ | |
346 | void ata_acpi_dissociate(struct ata_host *host) | |
347 | { | |
c05e6ff0 TH |
348 | int i; |
349 | ||
350 | /* Restore initial _GTM values so that driver which attaches | |
351 | * afterward can use them too. | |
352 | */ | |
353 | for (i = 0; i < host->n_ports; i++) { | |
354 | struct ata_port *ap = host->ports[i]; | |
355 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
356 | ||
357 | if (ap->acpi_handle && gtm) | |
358 | ata_acpi_stm(ap, gtm); | |
359 | } | |
562f0c2d TH |
360 | } |
361 | ||
64578a3d TH |
362 | /** |
363 | * ata_acpi_gtm - execute _GTM | |
364 | * @ap: target ATA port | |
365 | * @gtm: out parameter for _GTM result | |
366 | * | |
367 | * Evaluate _GTM and store the result in @gtm. | |
368 | * | |
369 | * LOCKING: | |
370 | * EH context. | |
371 | * | |
372 | * RETURNS: | |
373 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
374 | */ | |
0d02f0b2 | 375 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
376 | { |
377 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
378 | union acpi_object *out_obj; | |
379 | acpi_status status; | |
380 | int rc = 0; | |
381 | ||
382 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
383 | ||
384 | rc = -ENOENT; | |
385 | if (status == AE_NOT_FOUND) | |
386 | goto out_free; | |
387 | ||
388 | rc = -EINVAL; | |
389 | if (ACPI_FAILURE(status)) { | |
390 | ata_port_printk(ap, KERN_ERR, | |
391 | "ACPI get timing mode failed (AE 0x%x)\n", | |
392 | status); | |
393 | goto out_free; | |
394 | } | |
395 | ||
396 | out_obj = output.pointer; | |
397 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
398 | ata_port_printk(ap, KERN_WARNING, | |
399 | "_GTM returned unexpected object type 0x%x\n", | |
400 | out_obj->type); | |
401 | ||
402 | goto out_free; | |
403 | } | |
404 | ||
405 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
406 | ata_port_printk(ap, KERN_ERR, | |
407 | "_GTM returned invalid length %d\n", | |
408 | out_obj->buffer.length); | |
409 | goto out_free; | |
410 | } | |
411 | ||
412 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
413 | rc = 0; | |
414 | out_free: | |
415 | kfree(output.pointer); | |
416 | return rc; | |
417 | } | |
418 | ||
badff03d AC |
419 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
420 | ||
64578a3d TH |
421 | /** |
422 | * ata_acpi_stm - execute _STM | |
423 | * @ap: target ATA port | |
424 | * @stm: timing parameter to _STM | |
425 | * | |
426 | * Evaluate _STM with timing parameter @stm. | |
427 | * | |
428 | * LOCKING: | |
429 | * EH context. | |
430 | * | |
431 | * RETURNS: | |
432 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
433 | */ | |
0d02f0b2 | 434 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
435 | { |
436 | acpi_status status; | |
0d02f0b2 | 437 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
438 | struct acpi_object_list input; |
439 | union acpi_object in_params[3]; | |
440 | ||
441 | in_params[0].type = ACPI_TYPE_BUFFER; | |
442 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 443 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
444 | /* Buffers for id may need byteswapping ? */ |
445 | in_params[1].type = ACPI_TYPE_BUFFER; | |
446 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 447 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
448 | in_params[2].type = ACPI_TYPE_BUFFER; |
449 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 450 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
451 | |
452 | input.count = 3; | |
453 | input.pointer = in_params; | |
454 | ||
455 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
456 | ||
457 | if (status == AE_NOT_FOUND) | |
458 | return -ENOENT; | |
459 | if (ACPI_FAILURE(status)) { | |
460 | ata_port_printk(ap, KERN_ERR, | |
461 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
462 | return -EINVAL; | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
badff03d AC |
467 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
468 | ||
11ef697b | 469 | /** |
4700c4bc | 470 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 471 | * @dev: target ATA device |
4700c4bc | 472 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
473 | * |
474 | * This applies to both PATA and SATA drives. | |
475 | * | |
476 | * The _GTF method has no input parameters. | |
477 | * It returns a variable number of register set values (registers | |
478 | * hex 1F1..1F7, taskfiles). | |
479 | * The <variable number> is not known in advance, so have ACPI-CA | |
480 | * allocate the buffer as needed and return it, then free it later. | |
481 | * | |
4700c4bc TH |
482 | * LOCKING: |
483 | * EH context. | |
484 | * | |
485 | * RETURNS: | |
66fa7f21 TH |
486 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
487 | * if _GTF is invalid. | |
11ef697b | 488 | */ |
398e0782 | 489 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 490 | { |
9af5c9c9 | 491 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 492 | acpi_status status; |
3a32a8e9 TH |
493 | struct acpi_buffer output; |
494 | union acpi_object *out_obj; | |
4700c4bc | 495 | int rc = 0; |
11ef697b | 496 | |
398e0782 TH |
497 | /* if _GTF is cached, use the cached value */ |
498 | if (dev->gtf_cache) { | |
499 | out_obj = dev->gtf_cache; | |
500 | goto done; | |
501 | } | |
502 | ||
4700c4bc TH |
503 | /* set up output buffer */ |
504 | output.length = ACPI_ALLOCATE_BUFFER; | |
505 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 506 | |
11ef697b | 507 | if (ata_msg_probe(ap)) |
3a32a8e9 | 508 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 509 | __func__, ap->port_no); |
11ef697b | 510 | |
11ef697b | 511 | /* _GTF has no input parameters */ |
4700c4bc | 512 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 513 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 514 | |
11ef697b | 515 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
516 | if (status != AE_NOT_FOUND) { |
517 | ata_dev_printk(dev, KERN_WARNING, | |
518 | "_GTF evaluation failed (AE 0x%x)\n", | |
519 | status); | |
66fa7f21 | 520 | rc = -EINVAL; |
4700c4bc TH |
521 | } |
522 | goto out_free; | |
11ef697b KCA |
523 | } |
524 | ||
525 | if (!output.length || !output.pointer) { | |
526 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 527 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 528 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 529 | __func__, |
11ef697b KCA |
530 | (unsigned long long)output.length, |
531 | output.pointer); | |
66fa7f21 | 532 | rc = -EINVAL; |
4700c4bc | 533 | goto out_free; |
11ef697b KCA |
534 | } |
535 | ||
11ef697b | 536 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
537 | ata_dev_printk(dev, KERN_WARNING, |
538 | "_GTF unexpected object type 0x%x\n", | |
539 | out_obj->type); | |
66fa7f21 | 540 | rc = -EINVAL; |
4700c4bc | 541 | goto out_free; |
11ef697b KCA |
542 | } |
543 | ||
4700c4bc | 544 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
545 | ata_dev_printk(dev, KERN_WARNING, |
546 | "unexpected _GTF length (%d)\n", | |
547 | out_obj->buffer.length); | |
66fa7f21 | 548 | rc = -EINVAL; |
4700c4bc | 549 | goto out_free; |
11ef697b KCA |
550 | } |
551 | ||
398e0782 | 552 | done: |
4700c4bc | 553 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
554 | if (gtf) { |
555 | *gtf = (void *)out_obj->buffer.pointer; | |
556 | if (ata_msg_probe(ap)) | |
557 | ata_dev_printk(dev, KERN_DEBUG, | |
558 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 559 | __func__, *gtf, rc); |
398e0782 | 560 | } |
4700c4bc TH |
561 | return rc; |
562 | ||
563 | out_free: | |
398e0782 | 564 | ata_acpi_clear_gtf(dev); |
4700c4bc | 565 | return rc; |
11ef697b KCA |
566 | } |
567 | ||
7c77fa4d TH |
568 | /** |
569 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
570 | * @dev: target device | |
571 | * @gtm: GTM parameter to use | |
572 | * | |
573 | * Determine xfermask for @dev from @gtm. | |
574 | * | |
575 | * LOCKING: | |
576 | * None. | |
577 | * | |
578 | * RETURNS: | |
579 | * Determined xfermask. | |
580 | */ | |
581 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
582 | const struct ata_acpi_gtm *gtm) | |
583 | { | |
a0f79b92 TH |
584 | unsigned long xfer_mask = 0; |
585 | unsigned int type; | |
586 | int unit; | |
587 | u8 mode; | |
7c77fa4d TH |
588 | |
589 | /* we always use the 0 slot for crap hardware */ | |
590 | unit = dev->devno; | |
591 | if (!(gtm->flags & 0x10)) | |
592 | unit = 0; | |
593 | ||
a0f79b92 TH |
594 | /* PIO */ |
595 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
596 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
597 | |
598 | /* See if we have MWDMA or UDMA data. We don't bother with | |
599 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
600 | * and our error changedown if it works is UDMA to PIO anyway. | |
601 | */ | |
a0f79b92 TH |
602 | if (!(gtm->flags & (1 << (2 * unit)))) |
603 | type = ATA_SHIFT_MWDMA; | |
604 | else | |
605 | type = ATA_SHIFT_UDMA; | |
606 | ||
607 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
608 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 609 | |
a0f79b92 | 610 | return xfer_mask; |
7c77fa4d TH |
611 | } |
612 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
613 | ||
e1ddb4b6 AC |
614 | /** |
615 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
616 | * @ap: Port to check | |
021ee9a6 | 617 | * @gtm: GTM data to use |
e1ddb4b6 | 618 | * |
021ee9a6 | 619 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 620 | */ |
021ee9a6 | 621 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 622 | { |
021ee9a6 TH |
623 | struct ata_device *dev; |
624 | ||
625 | ata_link_for_each_dev(dev, &ap->link) { | |
626 | unsigned long xfer_mask, udma_mask; | |
627 | ||
628 | if (!ata_dev_enabled(dev)) | |
629 | continue; | |
630 | ||
631 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); | |
632 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
633 | ||
634 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
635 | return 1; | |
636 | } | |
637 | ||
e1ddb4b6 AC |
638 | return 0; |
639 | } | |
e1ddb4b6 AC |
640 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
641 | ||
3264a8d8 TH |
642 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
643 | const struct ata_acpi_gtf *gtf, | |
644 | struct ata_taskfile *tf) | |
645 | { | |
646 | ata_tf_init(dev, tf); | |
647 | ||
648 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
649 | tf->protocol = ATA_PROT_NODATA; | |
650 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
651 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
652 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
653 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
654 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
655 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
656 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
657 | } | |
658 | ||
659 | static int ata_acpi_filter_tf(const struct ata_taskfile *tf, | |
660 | const struct ata_taskfile *ptf) | |
661 | { | |
662 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
663 | /* libata doesn't use ACPI to configure transfer mode. | |
664 | * It will only confuse device configuration. Skip. | |
665 | */ | |
666 | if (tf->command == ATA_CMD_SET_FEATURES && | |
667 | tf->feature == SETFEATURES_XFER) | |
668 | return 1; | |
669 | } | |
670 | ||
671 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
672 | /* BIOS writers, sorry but we don't wanna lock | |
673 | * features unless the user explicitly said so. | |
674 | */ | |
675 | ||
676 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
677 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
678 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
679 | return 1; | |
680 | ||
681 | /* SECURITY FREEZE LOCK */ | |
682 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
683 | return 1; | |
684 | ||
685 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
686 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
687 | tf->command == ATA_CMD_SET_MAX && | |
688 | (tf->feature == ATA_SET_MAX_LOCK || | |
689 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
690 | return 1; | |
691 | } | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
11ef697b | 696 | /** |
0e8634bf | 697 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 698 | * @dev: target ATA device |
11ef697b KCA |
699 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
700 | * | |
701 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
702 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
703 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
704 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
705 | * hob_lbal, hob_lbam, and hob_lbah. | |
706 | * | |
707 | * This function waits for idle (!BUSY and !DRQ) after writing | |
708 | * registers. If the control register has a new value, this | |
709 | * function also waits for idle after writing control and before | |
710 | * writing the remaining registers. | |
711 | * | |
4700c4bc TH |
712 | * LOCKING: |
713 | * EH context. | |
714 | * | |
715 | * RETURNS: | |
3264a8d8 TH |
716 | * 1 if command is executed successfully. 0 if ignored, rejected or |
717 | * filtered out, -errno on other errors. | |
11ef697b | 718 | */ |
0e8634bf | 719 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
720 | const struct ata_acpi_gtf *gtf, |
721 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 722 | { |
3264a8d8 TH |
723 | struct ata_taskfile *pptf = NULL; |
724 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 725 | unsigned int err_mask; |
0e8634bf TH |
726 | const char *level; |
727 | char msg[60]; | |
728 | int rc; | |
fc16c25f | 729 | |
4700c4bc TH |
730 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
731 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
732 | && (gtf->tf[6] == 0)) | |
733 | return 0; | |
11ef697b | 734 | |
3264a8d8 TH |
735 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
736 | if (prev_gtf) { | |
737 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
738 | pptf = &ptf; | |
739 | } | |
740 | ||
741 | if (!ata_acpi_filter_tf(&tf, pptf)) { | |
742 | rtf = tf; | |
743 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
744 | DMA_NONE, NULL, 0, 0); | |
745 | ||
746 | switch (err_mask) { | |
747 | case 0: | |
748 | level = KERN_DEBUG; | |
749 | snprintf(msg, sizeof(msg), "succeeded"); | |
750 | rc = 1; | |
751 | break; | |
752 | ||
753 | case AC_ERR_DEV: | |
754 | level = KERN_INFO; | |
755 | snprintf(msg, sizeof(msg), | |
756 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
757 | rtf.command, rtf.feature); | |
758 | rc = 0; | |
759 | break; | |
760 | ||
761 | default: | |
762 | level = KERN_ERR; | |
763 | snprintf(msg, sizeof(msg), | |
764 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
765 | err_mask, rtf.command, rtf.feature); | |
766 | rc = -EIO; | |
767 | break; | |
768 | } | |
769 | } else { | |
0e8634bf | 770 | level = KERN_INFO; |
3264a8d8 | 771 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 772 | rc = 0; |
4700c4bc TH |
773 | } |
774 | ||
0e8634bf TH |
775 | ata_dev_printk(dev, level, |
776 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
777 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
778 | tf.lbam, tf.lbah, tf.device, msg); | |
779 | ||
780 | return rc; | |
11ef697b KCA |
781 | } |
782 | ||
11ef697b KCA |
783 | /** |
784 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 785 | * @dev: target ATA device |
66fa7f21 | 786 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 787 | * |
6746544c | 788 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
789 | * |
790 | * LOCKING: | |
791 | * EH context. | |
792 | * | |
793 | * RETURNS: | |
66fa7f21 TH |
794 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
795 | * -errno on other errors. | |
11ef697b | 796 | */ |
66fa7f21 | 797 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 798 | { |
3264a8d8 | 799 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
800 | int gtf_count, i, rc; |
801 | ||
802 | /* get taskfiles */ | |
66fa7f21 TH |
803 | rc = ata_dev_get_GTF(dev, >f); |
804 | if (rc < 0) | |
805 | return rc; | |
806 | gtf_count = rc; | |
6746544c TH |
807 | |
808 | /* execute them */ | |
3264a8d8 TH |
809 | for (i = 0; i < gtf_count; i++, gtf++) { |
810 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
811 | if (rc < 0) |
812 | break; | |
3264a8d8 | 813 | if (rc) { |
0e8634bf | 814 | (*nr_executed)++; |
3264a8d8 TH |
815 | pgtf = gtf; |
816 | } | |
11ef697b KCA |
817 | } |
818 | ||
398e0782 | 819 | ata_acpi_clear_gtf(dev); |
6746544c | 820 | |
0e8634bf TH |
821 | if (rc < 0) |
822 | return rc; | |
823 | return 0; | |
11ef697b KCA |
824 | } |
825 | ||
7ea1fbc2 KCA |
826 | /** |
827 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 828 | * @dev: target ATA device |
7ea1fbc2 KCA |
829 | * |
830 | * _SDD ACPI object: for SATA mode only | |
831 | * Must be after Identify (Packet) Device -- uses its data | |
832 | * ATM this function never returns a failure. It is an optional | |
833 | * method and if it fails for whatever reason, we should still | |
834 | * just keep going. | |
69b16a5f TH |
835 | * |
836 | * LOCKING: | |
837 | * EH context. | |
838 | * | |
839 | * RETURNS: | |
840 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 841 | */ |
6746544c | 842 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 843 | { |
9af5c9c9 | 844 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 845 | int err; |
3a32a8e9 TH |
846 | acpi_status status; |
847 | struct acpi_object_list input; | |
848 | union acpi_object in_params[1]; | |
7ea1fbc2 | 849 | |
7ea1fbc2 | 850 | if (ata_msg_probe(ap)) |
3a32a8e9 | 851 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 852 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 853 | |
7ea1fbc2 KCA |
854 | /* Give the drive Identify data to the drive via the _SDD method */ |
855 | /* _SDD: set up input parameters */ | |
856 | input.count = 1; | |
857 | input.pointer = in_params; | |
858 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
859 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
860 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
861 | /* Output buffer: _SDD has no output */ |
862 | ||
863 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 864 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 865 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 866 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
867 | |
868 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
869 | if (err < 0) |
870 | ata_dev_printk(dev, KERN_WARNING, | |
871 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 872 | |
6746544c TH |
873 | return err; |
874 | } | |
875 | ||
64578a3d TH |
876 | /** |
877 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
878 | * @ap: target ATA port | |
879 | * | |
880 | * This function is called when @ap is about to be suspended. All | |
881 | * devices are already put to sleep but the port_suspend() callback | |
882 | * hasn't been executed yet. Error return from this function aborts | |
883 | * suspend. | |
884 | * | |
885 | * LOCKING: | |
886 | * EH context. | |
887 | * | |
888 | * RETURNS: | |
889 | * 0 on success, -errno on failure. | |
890 | */ | |
891 | int ata_acpi_on_suspend(struct ata_port *ap) | |
892 | { | |
c05e6ff0 TH |
893 | /* nada */ |
894 | return 0; | |
64578a3d TH |
895 | } |
896 | ||
6746544c TH |
897 | /** |
898 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
899 | * @ap: target ATA port | |
900 | * | |
901 | * This function is called when @ap is resumed - right after port | |
902 | * itself is resumed but before any EH action is taken. | |
903 | * | |
904 | * LOCKING: | |
905 | * EH context. | |
906 | */ | |
907 | void ata_acpi_on_resume(struct ata_port *ap) | |
908 | { | |
c05e6ff0 | 909 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 910 | struct ata_device *dev; |
6746544c | 911 | |
398e0782 TH |
912 | if (ap->acpi_handle && gtm) { |
913 | /* _GTM valid */ | |
914 | ||
915 | /* restore timing parameters */ | |
c05e6ff0 | 916 | ata_acpi_stm(ap, gtm); |
64578a3d | 917 | |
398e0782 TH |
918 | /* _GTF should immediately follow _STM so that it can |
919 | * use values set by _STM. Cache _GTF result and | |
920 | * schedule _GTF. | |
921 | */ | |
922 | ata_link_for_each_dev(dev, &ap->link) { | |
923 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
924 | if (ata_dev_enabled(dev) && |
925 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
926 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
927 | } | |
928 | } else { | |
929 | /* SATA _GTF needs to be evaulated after _SDD and | |
930 | * there's no reason to evaluate IDE _GTF early | |
931 | * without _STM. Clear cache and schedule _GTF. | |
932 | */ | |
933 | ata_link_for_each_dev(dev, &ap->link) { | |
934 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
935 | if (ata_dev_enabled(dev)) |
936 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
937 | } |
938 | } | |
7ea1fbc2 KCA |
939 | } |
940 | ||
bd3adca5 SL |
941 | /** |
942 | * ata_acpi_set_state - set the port power state | |
943 | * @ap: target ATA port | |
944 | * @state: state, on/off | |
945 | * | |
946 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
947 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
948 | */ | |
949 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
950 | { | |
951 | struct ata_device *dev; | |
952 | ||
953 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
954 | return; | |
955 | ||
956 | /* channel first and then drives for power on and vica versa | |
957 | for power off */ | |
958 | if (state.event == PM_EVENT_ON) | |
959 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
960 | ||
961 | ata_link_for_each_dev(dev, &ap->link) { | |
962 | if (dev->acpi_handle && ata_dev_enabled(dev)) | |
963 | acpi_bus_set_power(dev->acpi_handle, | |
964 | state.event == PM_EVENT_ON ? | |
965 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
966 | } | |
967 | if (state.event != PM_EVENT_ON) | |
968 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
969 | } | |
970 | ||
6746544c TH |
971 | /** |
972 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
973 | * @dev: target ATA device | |
974 | * | |
975 | * This function is called when @dev is about to be configured. | |
976 | * IDENTIFY data might have been modified after this hook is run. | |
977 | * | |
978 | * LOCKING: | |
979 | * EH context. | |
980 | * | |
981 | * RETURNS: | |
982 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
983 | * -errno on failure. | |
984 | */ | |
985 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
986 | { | |
9af5c9c9 TH |
987 | struct ata_port *ap = dev->link->ap; |
988 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 989 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 990 | int nr_executed = 0; |
6746544c TH |
991 | int rc; |
992 | ||
6746544c TH |
993 | if (!dev->acpi_handle) |
994 | return 0; | |
995 | ||
996 | /* do we need to do _GTF? */ | |
997 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
998 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
999 | return 0; | |
1000 | ||
1001 | /* do _SDD if SATA */ | |
1002 | if (acpi_sata) { | |
1003 | rc = ata_acpi_push_id(dev); | |
1004 | if (rc) | |
1005 | goto acpi_err; | |
1006 | } | |
1007 | ||
1008 | /* do _GTF */ | |
66fa7f21 TH |
1009 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
1010 | if (rc) | |
6746544c TH |
1011 | goto acpi_err; |
1012 | ||
1013 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
1014 | ||
1015 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 1016 | if (nr_executed) { |
6746544c TH |
1017 | rc = ata_dev_reread_id(dev, 0); |
1018 | if (rc < 0) { | |
1019 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
1020 | "after ACPI commands\n"); | |
1021 | return rc; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | ||
1027 | acpi_err: | |
66fa7f21 TH |
1028 | /* ignore evaluation failure if we can continue safely */ |
1029 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1030 | return 0; | |
6746544c | 1031 | |
66fa7f21 TH |
1032 | /* fail and let EH retry once more for unknown IO errors */ |
1033 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1034 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1035 | return rc; | |
6746544c | 1036 | } |
66fa7f21 TH |
1037 | |
1038 | ata_dev_printk(dev, KERN_WARNING, | |
1039 | "ACPI: failed the second time, disabled\n"); | |
1040 | dev->acpi_handle = NULL; | |
1041 | ||
1042 | /* We can safely continue if no _GTF command has been executed | |
1043 | * and port is not frozen. | |
1044 | */ | |
1045 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1046 | return 0; | |
1047 | ||
6746544c TH |
1048 | return rc; |
1049 | } | |
562f0c2d TH |
1050 | |
1051 | /** | |
1052 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1053 | * @dev: target ATA device | |
1054 | * | |
1055 | * This function is called when @dev is about to be disabled. | |
1056 | * | |
1057 | * LOCKING: | |
1058 | * EH context. | |
1059 | */ | |
1060 | void ata_acpi_on_disable(struct ata_device *dev) | |
1061 | { | |
398e0782 | 1062 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1063 | } |