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> | |
11ef697b | 22 | |
3264a8d8 TH |
23 | enum { |
24 | ATA_ACPI_FILTER_SETXFER = 1 << 0, | |
25 | ATA_ACPI_FILTER_LOCK = 1 << 1, | |
b344991a | 26 | ATA_ACPI_FILTER_DIPM = 1 << 2, |
3264a8d8 TH |
27 | |
28 | ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | | |
b344991a TH |
29 | ATA_ACPI_FILTER_LOCK | |
30 | ATA_ACPI_FILTER_DIPM, | |
3264a8d8 TH |
31 | }; |
32 | ||
33 | static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; | |
34 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); | |
b344991a | 35 | 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)"); |
3264a8d8 | 36 | |
11ef697b | 37 | #define NO_PORT_MULT 0xffff |
2dcb407e | 38 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
39 | |
40 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
41 | struct ata_acpi_gtf { |
42 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
43 | } __packed; | |
11ef697b | 44 | |
ca426635 AC |
45 | /* |
46 | * Helper - belongs in the PCI layer somewhere eventually | |
47 | */ | |
48 | static int is_pci_dev(struct device *dev) | |
49 | { | |
50 | return (dev->bus == &pci_bus_type); | |
51 | } | |
11ef697b | 52 | |
398e0782 TH |
53 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
54 | { | |
55 | kfree(dev->gtf_cache); | |
56 | dev->gtf_cache = NULL; | |
57 | } | |
58 | ||
d0df8b5d TH |
59 | /** |
60 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
61 | * @ap: target SATA port | |
62 | * | |
63 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
64 | * fields of @ap, the port and devices accordingly. | |
65 | * | |
66 | * LOCKING: | |
67 | * EH context. | |
68 | * | |
69 | * RETURNS: | |
70 | * 0 on success, -errno on failure. | |
71 | */ | |
72 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 73 | { |
d0df8b5d TH |
74 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
75 | ||
071f44b1 | 76 | if (!sata_pmp_attached(ap)) { |
d0df8b5d TH |
77 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
78 | ||
79 | ap->link.device->acpi_handle = | |
80 | acpi_get_child(ap->host->acpi_handle, adr); | |
81 | } else { | |
82 | struct ata_link *link; | |
83 | ||
84 | ap->link.device->acpi_handle = NULL; | |
85 | ||
1eca4365 | 86 | ata_for_each_link(link, ap, EDGE) { |
d0df8b5d | 87 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); |
fafbae87 | 88 | |
d0df8b5d TH |
89 | link->device->acpi_handle = |
90 | acpi_get_child(ap->host->acpi_handle, adr); | |
91 | } | |
92 | } | |
11ef697b KCA |
93 | } |
94 | ||
fafbae87 | 95 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 96 | { |
fafbae87 | 97 | int max_devices, i; |
11ef697b | 98 | |
fafbae87 TH |
99 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
100 | if (!ap->acpi_handle) | |
101 | return; | |
11ef697b | 102 | |
fafbae87 TH |
103 | max_devices = 1; |
104 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
105 | max_devices++; | |
11ef697b | 106 | |
fafbae87 | 107 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 108 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 109 | |
fafbae87 | 110 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 111 | } |
c05e6ff0 TH |
112 | |
113 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
114 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
115 | } |
116 | ||
664d080c HM |
117 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
118 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
119 | { | |
120 | if (dev) | |
121 | dev->flags |= ATA_DFLAG_DETACH; | |
122 | else { | |
123 | struct ata_link *tlink; | |
124 | struct ata_device *tdev; | |
125 | ||
1eca4365 TH |
126 | ata_for_each_link(tlink, ap, EDGE) |
127 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
128 | tdev->flags |= ATA_DFLAG_DETACH; |
129 | } | |
130 | ||
131 | ata_port_schedule_eh(ap); | |
132 | } | |
133 | ||
134 | /** | |
135 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
136 | * @ap: ATA port ACPI event occurred | |
137 | * @dev: ATA device ACPI event occurred (can be NULL) | |
138 | * @event: ACPI event which occurred | |
664d080c HM |
139 | * |
140 | * All ACPI bay / device realted events end up in this function. If | |
141 | * the event is port-wide @dev is NULL. If the event is specific to a | |
142 | * device, @dev points to it. | |
143 | * | |
144 | * Hotplug (as opposed to unplug) notification is always handled as | |
145 | * port-wide while unplug only kills the target device on device-wide | |
146 | * event. | |
147 | * | |
148 | * LOCKING: | |
149 | * ACPI notify handler context. May sleep. | |
150 | */ | |
151 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 152 | u32 event) |
237d8440 | 153 | { |
664d080c | 154 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
155 | int wait = 0; |
156 | unsigned long flags; | |
f730ae18 | 157 | acpi_handle handle; |
c85665ff | 158 | |
f730ae18 | 159 | if (dev) |
ae6c23c4 | 160 | handle = dev->acpi_handle; |
f730ae18 | 161 | else |
ae6c23c4 | 162 | handle = ap->acpi_handle; |
3c1e3896 | 163 | |
664d080c | 164 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
165 | /* |
166 | * When dock driver calls into the routine, it will always use | |
167 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
168 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
169 | */ | |
233f1120 TH |
170 | switch (event) { |
171 | case ACPI_NOTIFY_BUS_CHECK: | |
172 | case ACPI_NOTIFY_DEVICE_CHECK: | |
173 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 174 | |
f730ae18 SL |
175 | ata_ehi_hotplugged(ehi); |
176 | ata_port_freeze(ap); | |
664d080c HM |
177 | break; |
178 | case ACPI_NOTIFY_EJECT_REQUEST: | |
179 | ata_ehi_push_desc(ehi, "ACPI event"); | |
180 | ||
664d080c HM |
181 | ata_acpi_detach_device(ap, dev); |
182 | wait = 1; | |
183 | break; | |
237d8440 MG |
184 | } |
185 | ||
ae6c23c4 MG |
186 | spin_unlock_irqrestore(ap->lock, flags); |
187 | ||
f730ae18 | 188 | if (wait) |
ae6c23c4 | 189 | ata_port_wait_eh(ap); |
664d080c HM |
190 | } |
191 | ||
192 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
193 | { | |
194 | struct ata_device *dev = data; | |
195 | ||
f730ae18 | 196 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
197 | } |
198 | ||
199 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
200 | { | |
201 | struct ata_port *ap = data; | |
202 | ||
f730ae18 | 203 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
204 | } |
205 | ||
1253f7aa SL |
206 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
207 | u32 event) | |
208 | { | |
209 | struct kobject *kobj = NULL; | |
210 | char event_string[20]; | |
211 | char *envp[] = { event_string, NULL }; | |
212 | ||
213 | if (dev) { | |
214 | if (dev->sdev) | |
215 | kobj = &dev->sdev->sdev_gendev.kobj; | |
216 | } else | |
217 | kobj = &ap->dev->kobj; | |
218 | ||
219 | if (kobj) { | |
220 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
221 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
222 | } | |
223 | } | |
224 | ||
225 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
226 | { | |
227 | ata_acpi_uevent(data, NULL, event); | |
228 | } | |
229 | ||
230 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
231 | { | |
232 | struct ata_device *dev = data; | |
233 | ata_acpi_uevent(dev->link->ap, dev, event); | |
234 | } | |
235 | ||
236 | static struct acpi_dock_ops ata_acpi_dev_dock_ops = { | |
237 | .handler = ata_acpi_dev_notify_dock, | |
238 | .uevent = ata_acpi_dev_uevent, | |
239 | }; | |
240 | ||
241 | static struct acpi_dock_ops ata_acpi_ap_dock_ops = { | |
242 | .handler = ata_acpi_ap_notify_dock, | |
243 | .uevent = ata_acpi_ap_uevent, | |
244 | }; | |
245 | ||
fafbae87 TH |
246 | /** |
247 | * ata_acpi_associate - associate ATA host with ACPI objects | |
248 | * @host: target ATA host | |
249 | * | |
250 | * Look up ACPI objects associated with @host and initialize | |
251 | * acpi_handle fields of @host, its ports and devices accordingly. | |
252 | * | |
253 | * LOCKING: | |
254 | * EH context. | |
255 | * | |
256 | * RETURNS: | |
257 | * 0 on success, -errno on failure. | |
258 | */ | |
259 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 260 | { |
237d8440 | 261 | int i, j; |
11ef697b | 262 | |
fafbae87 TH |
263 | if (!is_pci_dev(host->dev) || libata_noacpi) |
264 | return; | |
11ef697b | 265 | |
fafbae87 TH |
266 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
267 | if (!host->acpi_handle) | |
268 | return; | |
11ef697b | 269 | |
fafbae87 TH |
270 | for (i = 0; i < host->n_ports; i++) { |
271 | struct ata_port *ap = host->ports[i]; | |
272 | ||
273 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
274 | ata_acpi_associate_sata_port(ap); | |
275 | else | |
276 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 277 | |
233f1120 | 278 | if (ap->acpi_handle) { |
233f1120 TH |
279 | /* we might be on a docking station */ |
280 | register_hotplug_dock_device(ap->acpi_handle, | |
1253f7aa | 281 | &ata_acpi_ap_dock_ops, ap); |
233f1120 | 282 | } |
237d8440 MG |
283 | |
284 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
285 | struct ata_device *dev = &ap->link.device[j]; | |
286 | ||
233f1120 | 287 | if (dev->acpi_handle) { |
233f1120 TH |
288 | /* we might be on a docking station */ |
289 | register_hotplug_dock_device(dev->acpi_handle, | |
1253f7aa | 290 | &ata_acpi_dev_dock_ops, dev); |
233f1120 | 291 | } |
237d8440 | 292 | } |
11ef697b | 293 | } |
11ef697b KCA |
294 | } |
295 | ||
562f0c2d TH |
296 | /** |
297 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
298 | * @host: target ATA host | |
299 | * | |
300 | * This function is called during driver detach after the whole host | |
301 | * is shut down. | |
302 | * | |
303 | * LOCKING: | |
304 | * EH context. | |
305 | */ | |
306 | void ata_acpi_dissociate(struct ata_host *host) | |
307 | { | |
c05e6ff0 TH |
308 | int i; |
309 | ||
310 | /* Restore initial _GTM values so that driver which attaches | |
311 | * afterward can use them too. | |
312 | */ | |
313 | for (i = 0; i < host->n_ports; i++) { | |
314 | struct ata_port *ap = host->ports[i]; | |
315 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
316 | ||
317 | if (ap->acpi_handle && gtm) | |
318 | ata_acpi_stm(ap, gtm); | |
319 | } | |
562f0c2d TH |
320 | } |
321 | ||
64578a3d TH |
322 | /** |
323 | * ata_acpi_gtm - execute _GTM | |
324 | * @ap: target ATA port | |
325 | * @gtm: out parameter for _GTM result | |
326 | * | |
327 | * Evaluate _GTM and store the result in @gtm. | |
328 | * | |
329 | * LOCKING: | |
330 | * EH context. | |
331 | * | |
332 | * RETURNS: | |
333 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
334 | */ | |
0d02f0b2 | 335 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
336 | { |
337 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
338 | union acpi_object *out_obj; | |
339 | acpi_status status; | |
340 | int rc = 0; | |
341 | ||
342 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
343 | ||
344 | rc = -ENOENT; | |
345 | if (status == AE_NOT_FOUND) | |
346 | goto out_free; | |
347 | ||
348 | rc = -EINVAL; | |
349 | if (ACPI_FAILURE(status)) { | |
350 | ata_port_printk(ap, KERN_ERR, | |
351 | "ACPI get timing mode failed (AE 0x%x)\n", | |
352 | status); | |
353 | goto out_free; | |
354 | } | |
355 | ||
356 | out_obj = output.pointer; | |
357 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
358 | ata_port_printk(ap, KERN_WARNING, | |
359 | "_GTM returned unexpected object type 0x%x\n", | |
360 | out_obj->type); | |
361 | ||
362 | goto out_free; | |
363 | } | |
364 | ||
365 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
366 | ata_port_printk(ap, KERN_ERR, | |
367 | "_GTM returned invalid length %d\n", | |
368 | out_obj->buffer.length); | |
369 | goto out_free; | |
370 | } | |
371 | ||
372 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
373 | rc = 0; | |
374 | out_free: | |
375 | kfree(output.pointer); | |
376 | return rc; | |
377 | } | |
378 | ||
badff03d AC |
379 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
380 | ||
64578a3d TH |
381 | /** |
382 | * ata_acpi_stm - execute _STM | |
383 | * @ap: target ATA port | |
384 | * @stm: timing parameter to _STM | |
385 | * | |
386 | * Evaluate _STM with timing parameter @stm. | |
387 | * | |
388 | * LOCKING: | |
389 | * EH context. | |
390 | * | |
391 | * RETURNS: | |
392 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
393 | */ | |
0d02f0b2 | 394 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
395 | { |
396 | acpi_status status; | |
0d02f0b2 | 397 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
398 | struct acpi_object_list input; |
399 | union acpi_object in_params[3]; | |
400 | ||
401 | in_params[0].type = ACPI_TYPE_BUFFER; | |
402 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 403 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
404 | /* Buffers for id may need byteswapping ? */ |
405 | in_params[1].type = ACPI_TYPE_BUFFER; | |
406 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 407 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
408 | in_params[2].type = ACPI_TYPE_BUFFER; |
409 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 410 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
411 | |
412 | input.count = 3; | |
413 | input.pointer = in_params; | |
414 | ||
415 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
416 | ||
417 | if (status == AE_NOT_FOUND) | |
418 | return -ENOENT; | |
419 | if (ACPI_FAILURE(status)) { | |
420 | ata_port_printk(ap, KERN_ERR, | |
421 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
422 | return -EINVAL; | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
badff03d AC |
427 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
428 | ||
11ef697b | 429 | /** |
4700c4bc | 430 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 431 | * @dev: target ATA device |
4700c4bc | 432 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
433 | * |
434 | * This applies to both PATA and SATA drives. | |
435 | * | |
436 | * The _GTF method has no input parameters. | |
437 | * It returns a variable number of register set values (registers | |
438 | * hex 1F1..1F7, taskfiles). | |
439 | * The <variable number> is not known in advance, so have ACPI-CA | |
440 | * allocate the buffer as needed and return it, then free it later. | |
441 | * | |
4700c4bc TH |
442 | * LOCKING: |
443 | * EH context. | |
444 | * | |
445 | * RETURNS: | |
66fa7f21 TH |
446 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
447 | * if _GTF is invalid. | |
11ef697b | 448 | */ |
398e0782 | 449 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 450 | { |
9af5c9c9 | 451 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 452 | acpi_status status; |
3a32a8e9 TH |
453 | struct acpi_buffer output; |
454 | union acpi_object *out_obj; | |
4700c4bc | 455 | int rc = 0; |
11ef697b | 456 | |
398e0782 TH |
457 | /* if _GTF is cached, use the cached value */ |
458 | if (dev->gtf_cache) { | |
459 | out_obj = dev->gtf_cache; | |
460 | goto done; | |
461 | } | |
462 | ||
4700c4bc TH |
463 | /* set up output buffer */ |
464 | output.length = ACPI_ALLOCATE_BUFFER; | |
465 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 466 | |
11ef697b | 467 | if (ata_msg_probe(ap)) |
3a32a8e9 | 468 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 469 | __func__, ap->port_no); |
11ef697b | 470 | |
11ef697b | 471 | /* _GTF has no input parameters */ |
4700c4bc | 472 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 473 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 474 | |
11ef697b | 475 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
476 | if (status != AE_NOT_FOUND) { |
477 | ata_dev_printk(dev, KERN_WARNING, | |
478 | "_GTF evaluation failed (AE 0x%x)\n", | |
479 | status); | |
66fa7f21 | 480 | rc = -EINVAL; |
4700c4bc TH |
481 | } |
482 | goto out_free; | |
11ef697b KCA |
483 | } |
484 | ||
485 | if (!output.length || !output.pointer) { | |
486 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 487 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 488 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 489 | __func__, |
11ef697b KCA |
490 | (unsigned long long)output.length, |
491 | output.pointer); | |
66fa7f21 | 492 | rc = -EINVAL; |
4700c4bc | 493 | goto out_free; |
11ef697b KCA |
494 | } |
495 | ||
11ef697b | 496 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
497 | ata_dev_printk(dev, KERN_WARNING, |
498 | "_GTF unexpected object type 0x%x\n", | |
499 | out_obj->type); | |
66fa7f21 | 500 | rc = -EINVAL; |
4700c4bc | 501 | goto out_free; |
11ef697b KCA |
502 | } |
503 | ||
4700c4bc | 504 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
505 | ata_dev_printk(dev, KERN_WARNING, |
506 | "unexpected _GTF length (%d)\n", | |
507 | out_obj->buffer.length); | |
66fa7f21 | 508 | rc = -EINVAL; |
4700c4bc | 509 | goto out_free; |
11ef697b KCA |
510 | } |
511 | ||
398e0782 | 512 | done: |
4700c4bc | 513 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
514 | if (gtf) { |
515 | *gtf = (void *)out_obj->buffer.pointer; | |
516 | if (ata_msg_probe(ap)) | |
517 | ata_dev_printk(dev, KERN_DEBUG, | |
518 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 519 | __func__, *gtf, rc); |
398e0782 | 520 | } |
4700c4bc TH |
521 | return rc; |
522 | ||
523 | out_free: | |
398e0782 | 524 | ata_acpi_clear_gtf(dev); |
4700c4bc | 525 | return rc; |
11ef697b KCA |
526 | } |
527 | ||
7c77fa4d TH |
528 | /** |
529 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
530 | * @dev: target device | |
531 | * @gtm: GTM parameter to use | |
532 | * | |
533 | * Determine xfermask for @dev from @gtm. | |
534 | * | |
535 | * LOCKING: | |
536 | * None. | |
537 | * | |
538 | * RETURNS: | |
539 | * Determined xfermask. | |
540 | */ | |
541 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
542 | const struct ata_acpi_gtm *gtm) | |
543 | { | |
a0f79b92 TH |
544 | unsigned long xfer_mask = 0; |
545 | unsigned int type; | |
546 | int unit; | |
547 | u8 mode; | |
7c77fa4d TH |
548 | |
549 | /* we always use the 0 slot for crap hardware */ | |
550 | unit = dev->devno; | |
551 | if (!(gtm->flags & 0x10)) | |
552 | unit = 0; | |
553 | ||
a0f79b92 TH |
554 | /* PIO */ |
555 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
556 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
557 | |
558 | /* See if we have MWDMA or UDMA data. We don't bother with | |
559 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
560 | * and our error changedown if it works is UDMA to PIO anyway. | |
561 | */ | |
a0f79b92 TH |
562 | if (!(gtm->flags & (1 << (2 * unit)))) |
563 | type = ATA_SHIFT_MWDMA; | |
564 | else | |
565 | type = ATA_SHIFT_UDMA; | |
566 | ||
567 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
568 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 569 | |
a0f79b92 | 570 | return xfer_mask; |
7c77fa4d TH |
571 | } |
572 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
573 | ||
e1ddb4b6 AC |
574 | /** |
575 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
576 | * @ap: Port to check | |
021ee9a6 | 577 | * @gtm: GTM data to use |
e1ddb4b6 | 578 | * |
021ee9a6 | 579 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 580 | */ |
021ee9a6 | 581 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 582 | { |
021ee9a6 TH |
583 | struct ata_device *dev; |
584 | ||
1eca4365 | 585 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
586 | unsigned long xfer_mask, udma_mask; |
587 | ||
021ee9a6 TH |
588 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
589 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
590 | ||
591 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
592 | return 1; | |
593 | } | |
594 | ||
e1ddb4b6 AC |
595 | return 0; |
596 | } | |
e1ddb4b6 AC |
597 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
598 | ||
3264a8d8 TH |
599 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
600 | const struct ata_acpi_gtf *gtf, | |
601 | struct ata_taskfile *tf) | |
602 | { | |
603 | ata_tf_init(dev, tf); | |
604 | ||
605 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
606 | tf->protocol = ATA_PROT_NODATA; | |
607 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
608 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
609 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
610 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
611 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
612 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
613 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
614 | } | |
615 | ||
616 | static int ata_acpi_filter_tf(const struct ata_taskfile *tf, | |
617 | const struct ata_taskfile *ptf) | |
618 | { | |
619 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
620 | /* libata doesn't use ACPI to configure transfer mode. | |
621 | * It will only confuse device configuration. Skip. | |
622 | */ | |
623 | if (tf->command == ATA_CMD_SET_FEATURES && | |
624 | tf->feature == SETFEATURES_XFER) | |
625 | return 1; | |
626 | } | |
627 | ||
628 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
629 | /* BIOS writers, sorry but we don't wanna lock | |
630 | * features unless the user explicitly said so. | |
631 | */ | |
632 | ||
633 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
634 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
635 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
636 | return 1; | |
637 | ||
638 | /* SECURITY FREEZE LOCK */ | |
639 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
640 | return 1; | |
641 | ||
642 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
643 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
644 | tf->command == ATA_CMD_SET_MAX && | |
645 | (tf->feature == ATA_SET_MAX_LOCK || | |
646 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
647 | return 1; | |
648 | } | |
649 | ||
b344991a TH |
650 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM) { |
651 | /* inhibit enabling DIPM */ | |
652 | if (tf->command == ATA_CMD_SET_FEATURES && | |
653 | tf->feature == SETFEATURES_SATA_ENABLE && | |
654 | tf->nsect == SATA_DIPM) | |
655 | return 1; | |
656 | } | |
657 | ||
3264a8d8 TH |
658 | return 0; |
659 | } | |
660 | ||
11ef697b | 661 | /** |
0e8634bf | 662 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 663 | * @dev: target ATA device |
11ef697b KCA |
664 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
665 | * | |
666 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
667 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
668 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
669 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
670 | * hob_lbal, hob_lbam, and hob_lbah. | |
671 | * | |
672 | * This function waits for idle (!BUSY and !DRQ) after writing | |
673 | * registers. If the control register has a new value, this | |
674 | * function also waits for idle after writing control and before | |
675 | * writing the remaining registers. | |
676 | * | |
4700c4bc TH |
677 | * LOCKING: |
678 | * EH context. | |
679 | * | |
680 | * RETURNS: | |
3264a8d8 TH |
681 | * 1 if command is executed successfully. 0 if ignored, rejected or |
682 | * filtered out, -errno on other errors. | |
11ef697b | 683 | */ |
0e8634bf | 684 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
685 | const struct ata_acpi_gtf *gtf, |
686 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 687 | { |
3264a8d8 TH |
688 | struct ata_taskfile *pptf = NULL; |
689 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 690 | unsigned int err_mask; |
0e8634bf TH |
691 | const char *level; |
692 | char msg[60]; | |
693 | int rc; | |
fc16c25f | 694 | |
4700c4bc TH |
695 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
696 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
697 | && (gtf->tf[6] == 0)) | |
698 | return 0; | |
11ef697b | 699 | |
3264a8d8 TH |
700 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
701 | if (prev_gtf) { | |
702 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
703 | pptf = &ptf; | |
704 | } | |
705 | ||
706 | if (!ata_acpi_filter_tf(&tf, pptf)) { | |
707 | rtf = tf; | |
708 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
709 | DMA_NONE, NULL, 0, 0); | |
710 | ||
711 | switch (err_mask) { | |
712 | case 0: | |
713 | level = KERN_DEBUG; | |
714 | snprintf(msg, sizeof(msg), "succeeded"); | |
715 | rc = 1; | |
716 | break; | |
717 | ||
718 | case AC_ERR_DEV: | |
719 | level = KERN_INFO; | |
720 | snprintf(msg, sizeof(msg), | |
721 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
722 | rtf.command, rtf.feature); | |
723 | rc = 0; | |
724 | break; | |
725 | ||
726 | default: | |
727 | level = KERN_ERR; | |
728 | snprintf(msg, sizeof(msg), | |
729 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
730 | err_mask, rtf.command, rtf.feature); | |
731 | rc = -EIO; | |
732 | break; | |
733 | } | |
734 | } else { | |
0e8634bf | 735 | level = KERN_INFO; |
3264a8d8 | 736 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 737 | rc = 0; |
4700c4bc TH |
738 | } |
739 | ||
0e8634bf TH |
740 | ata_dev_printk(dev, level, |
741 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
742 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
743 | tf.lbam, tf.lbah, tf.device, msg); | |
744 | ||
745 | return rc; | |
11ef697b KCA |
746 | } |
747 | ||
11ef697b KCA |
748 | /** |
749 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 750 | * @dev: target ATA device |
66fa7f21 | 751 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 752 | * |
6746544c | 753 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
754 | * |
755 | * LOCKING: | |
756 | * EH context. | |
757 | * | |
758 | * RETURNS: | |
66fa7f21 TH |
759 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
760 | * -errno on other errors. | |
11ef697b | 761 | */ |
66fa7f21 | 762 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 763 | { |
3264a8d8 | 764 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
765 | int gtf_count, i, rc; |
766 | ||
767 | /* get taskfiles */ | |
66fa7f21 TH |
768 | rc = ata_dev_get_GTF(dev, >f); |
769 | if (rc < 0) | |
770 | return rc; | |
771 | gtf_count = rc; | |
6746544c TH |
772 | |
773 | /* execute them */ | |
3264a8d8 TH |
774 | for (i = 0; i < gtf_count; i++, gtf++) { |
775 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
776 | if (rc < 0) |
777 | break; | |
3264a8d8 | 778 | if (rc) { |
0e8634bf | 779 | (*nr_executed)++; |
3264a8d8 TH |
780 | pgtf = gtf; |
781 | } | |
11ef697b KCA |
782 | } |
783 | ||
398e0782 | 784 | ata_acpi_clear_gtf(dev); |
6746544c | 785 | |
0e8634bf TH |
786 | if (rc < 0) |
787 | return rc; | |
788 | return 0; | |
11ef697b KCA |
789 | } |
790 | ||
7ea1fbc2 KCA |
791 | /** |
792 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 793 | * @dev: target ATA device |
7ea1fbc2 KCA |
794 | * |
795 | * _SDD ACPI object: for SATA mode only | |
796 | * Must be after Identify (Packet) Device -- uses its data | |
797 | * ATM this function never returns a failure. It is an optional | |
798 | * method and if it fails for whatever reason, we should still | |
799 | * just keep going. | |
69b16a5f TH |
800 | * |
801 | * LOCKING: | |
802 | * EH context. | |
803 | * | |
804 | * RETURNS: | |
805 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 806 | */ |
6746544c | 807 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 808 | { |
9af5c9c9 | 809 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 810 | int err; |
3a32a8e9 TH |
811 | acpi_status status; |
812 | struct acpi_object_list input; | |
813 | union acpi_object in_params[1]; | |
7ea1fbc2 | 814 | |
7ea1fbc2 | 815 | if (ata_msg_probe(ap)) |
3a32a8e9 | 816 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 817 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 818 | |
7ea1fbc2 KCA |
819 | /* Give the drive Identify data to the drive via the _SDD method */ |
820 | /* _SDD: set up input parameters */ | |
821 | input.count = 1; | |
822 | input.pointer = in_params; | |
823 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
824 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
825 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
826 | /* Output buffer: _SDD has no output */ |
827 | ||
828 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 829 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 830 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 831 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
832 | |
833 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
834 | if (err < 0) |
835 | ata_dev_printk(dev, KERN_WARNING, | |
836 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 837 | |
6746544c TH |
838 | return err; |
839 | } | |
840 | ||
64578a3d TH |
841 | /** |
842 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
843 | * @ap: target ATA port | |
844 | * | |
845 | * This function is called when @ap is about to be suspended. All | |
846 | * devices are already put to sleep but the port_suspend() callback | |
847 | * hasn't been executed yet. Error return from this function aborts | |
848 | * suspend. | |
849 | * | |
850 | * LOCKING: | |
851 | * EH context. | |
852 | * | |
853 | * RETURNS: | |
854 | * 0 on success, -errno on failure. | |
855 | */ | |
856 | int ata_acpi_on_suspend(struct ata_port *ap) | |
857 | { | |
c05e6ff0 TH |
858 | /* nada */ |
859 | return 0; | |
64578a3d TH |
860 | } |
861 | ||
6746544c TH |
862 | /** |
863 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
864 | * @ap: target ATA port | |
865 | * | |
866 | * This function is called when @ap is resumed - right after port | |
867 | * itself is resumed but before any EH action is taken. | |
868 | * | |
869 | * LOCKING: | |
870 | * EH context. | |
871 | */ | |
872 | void ata_acpi_on_resume(struct ata_port *ap) | |
873 | { | |
c05e6ff0 | 874 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 875 | struct ata_device *dev; |
6746544c | 876 | |
398e0782 TH |
877 | if (ap->acpi_handle && gtm) { |
878 | /* _GTM valid */ | |
879 | ||
880 | /* restore timing parameters */ | |
c05e6ff0 | 881 | ata_acpi_stm(ap, gtm); |
64578a3d | 882 | |
398e0782 TH |
883 | /* _GTF should immediately follow _STM so that it can |
884 | * use values set by _STM. Cache _GTF result and | |
885 | * schedule _GTF. | |
886 | */ | |
1eca4365 | 887 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 888 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
889 | if (ata_dev_enabled(dev) && |
890 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
891 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
892 | } | |
893 | } else { | |
894 | /* SATA _GTF needs to be evaulated after _SDD and | |
895 | * there's no reason to evaluate IDE _GTF early | |
896 | * without _STM. Clear cache and schedule _GTF. | |
897 | */ | |
1eca4365 | 898 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 899 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
900 | if (ata_dev_enabled(dev)) |
901 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
902 | } |
903 | } | |
7ea1fbc2 KCA |
904 | } |
905 | ||
bd3adca5 SL |
906 | /** |
907 | * ata_acpi_set_state - set the port power state | |
908 | * @ap: target ATA port | |
909 | * @state: state, on/off | |
910 | * | |
911 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
912 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
913 | */ | |
914 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
915 | { | |
916 | struct ata_device *dev; | |
917 | ||
918 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
919 | return; | |
920 | ||
921 | /* channel first and then drives for power on and vica versa | |
922 | for power off */ | |
923 | if (state.event == PM_EVENT_ON) | |
924 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
925 | ||
1eca4365 TH |
926 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
927 | if (dev->acpi_handle) | |
bd3adca5 SL |
928 | acpi_bus_set_power(dev->acpi_handle, |
929 | state.event == PM_EVENT_ON ? | |
930 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
931 | } | |
932 | if (state.event != PM_EVENT_ON) | |
933 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
934 | } | |
935 | ||
6746544c TH |
936 | /** |
937 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
938 | * @dev: target ATA device | |
939 | * | |
940 | * This function is called when @dev is about to be configured. | |
941 | * IDENTIFY data might have been modified after this hook is run. | |
942 | * | |
943 | * LOCKING: | |
944 | * EH context. | |
945 | * | |
946 | * RETURNS: | |
947 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
948 | * -errno on failure. | |
949 | */ | |
950 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
951 | { | |
9af5c9c9 TH |
952 | struct ata_port *ap = dev->link->ap; |
953 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 954 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 955 | int nr_executed = 0; |
6746544c TH |
956 | int rc; |
957 | ||
6746544c TH |
958 | if (!dev->acpi_handle) |
959 | return 0; | |
960 | ||
961 | /* do we need to do _GTF? */ | |
962 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
963 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
964 | return 0; | |
965 | ||
966 | /* do _SDD if SATA */ | |
967 | if (acpi_sata) { | |
968 | rc = ata_acpi_push_id(dev); | |
969 | if (rc) | |
970 | goto acpi_err; | |
971 | } | |
972 | ||
973 | /* do _GTF */ | |
66fa7f21 TH |
974 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
975 | if (rc) | |
6746544c TH |
976 | goto acpi_err; |
977 | ||
978 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
979 | ||
980 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 981 | if (nr_executed) { |
6746544c TH |
982 | rc = ata_dev_reread_id(dev, 0); |
983 | if (rc < 0) { | |
984 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
985 | "after ACPI commands\n"); | |
986 | return rc; | |
987 | } | |
988 | } | |
989 | ||
990 | return 0; | |
991 | ||
992 | acpi_err: | |
66fa7f21 TH |
993 | /* ignore evaluation failure if we can continue safely */ |
994 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
995 | return 0; | |
6746544c | 996 | |
66fa7f21 TH |
997 | /* fail and let EH retry once more for unknown IO errors */ |
998 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
999 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1000 | return rc; | |
6746544c | 1001 | } |
66fa7f21 TH |
1002 | |
1003 | ata_dev_printk(dev, KERN_WARNING, | |
1004 | "ACPI: failed the second time, disabled\n"); | |
1005 | dev->acpi_handle = NULL; | |
1006 | ||
1007 | /* We can safely continue if no _GTF command has been executed | |
1008 | * and port is not frozen. | |
1009 | */ | |
1010 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1011 | return 0; | |
1012 | ||
6746544c TH |
1013 | return rc; |
1014 | } | |
562f0c2d TH |
1015 | |
1016 | /** | |
1017 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1018 | * @dev: target ATA device | |
1019 | * | |
1020 | * This function is called when @dev is about to be disabled. | |
1021 | * | |
1022 | * LOCKING: | |
1023 | * EH context. | |
1024 | */ | |
1025 | void ata_acpi_on_disable(struct ata_device *dev) | |
1026 | { | |
398e0782 | 1027 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1028 | } |