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 | |
110f66d2 | 23 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 24 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 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)"); |
3264a8d8 | 26 | |
11ef697b | 27 | #define NO_PORT_MULT 0xffff |
2dcb407e | 28 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
29 | |
30 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
31 | struct ata_acpi_gtf { |
32 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
33 | } __packed; | |
11ef697b | 34 | |
ca426635 AC |
35 | /* |
36 | * Helper - belongs in the PCI layer somewhere eventually | |
37 | */ | |
38 | static int is_pci_dev(struct device *dev) | |
39 | { | |
40 | return (dev->bus == &pci_bus_type); | |
41 | } | |
11ef697b | 42 | |
398e0782 TH |
43 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
44 | { | |
45 | kfree(dev->gtf_cache); | |
46 | dev->gtf_cache = NULL; | |
47 | } | |
48 | ||
d0df8b5d TH |
49 | /** |
50 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
51 | * @ap: target SATA port | |
52 | * | |
53 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
54 | * fields of @ap, the port and devices accordingly. | |
55 | * | |
56 | * LOCKING: | |
57 | * EH context. | |
58 | * | |
59 | * RETURNS: | |
60 | * 0 on success, -errno on failure. | |
61 | */ | |
62 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 63 | { |
d0df8b5d TH |
64 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
65 | ||
071f44b1 | 66 | if (!sata_pmp_attached(ap)) { |
439913ff | 67 | u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
d0df8b5d TH |
68 | |
69 | ap->link.device->acpi_handle = | |
70 | acpi_get_child(ap->host->acpi_handle, adr); | |
71 | } else { | |
72 | struct ata_link *link; | |
73 | ||
74 | ap->link.device->acpi_handle = NULL; | |
75 | ||
1eca4365 | 76 | ata_for_each_link(link, ap, EDGE) { |
439913ff | 77 | u64 adr = SATA_ADR(ap->port_no, link->pmp); |
fafbae87 | 78 | |
d0df8b5d TH |
79 | link->device->acpi_handle = |
80 | acpi_get_child(ap->host->acpi_handle, adr); | |
81 | } | |
82 | } | |
11ef697b KCA |
83 | } |
84 | ||
fafbae87 | 85 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 86 | { |
fafbae87 | 87 | int max_devices, i; |
11ef697b | 88 | |
fafbae87 TH |
89 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
90 | if (!ap->acpi_handle) | |
91 | return; | |
11ef697b | 92 | |
fafbae87 TH |
93 | max_devices = 1; |
94 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
95 | max_devices++; | |
11ef697b | 96 | |
fafbae87 | 97 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 98 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 99 | |
fafbae87 | 100 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 101 | } |
c05e6ff0 TH |
102 | |
103 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
104 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
105 | } |
106 | ||
664d080c HM |
107 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
108 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
109 | { | |
110 | if (dev) | |
111 | dev->flags |= ATA_DFLAG_DETACH; | |
112 | else { | |
113 | struct ata_link *tlink; | |
114 | struct ata_device *tdev; | |
115 | ||
1eca4365 TH |
116 | ata_for_each_link(tlink, ap, EDGE) |
117 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
118 | tdev->flags |= ATA_DFLAG_DETACH; |
119 | } | |
120 | ||
121 | ata_port_schedule_eh(ap); | |
122 | } | |
123 | ||
124 | /** | |
125 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
126 | * @ap: ATA port ACPI event occurred | |
127 | * @dev: ATA device ACPI event occurred (can be NULL) | |
128 | * @event: ACPI event which occurred | |
664d080c HM |
129 | * |
130 | * All ACPI bay / device realted events end up in this function. If | |
131 | * the event is port-wide @dev is NULL. If the event is specific to a | |
132 | * device, @dev points to it. | |
133 | * | |
134 | * Hotplug (as opposed to unplug) notification is always handled as | |
135 | * port-wide while unplug only kills the target device on device-wide | |
136 | * event. | |
137 | * | |
138 | * LOCKING: | |
139 | * ACPI notify handler context. May sleep. | |
140 | */ | |
141 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 142 | u32 event) |
237d8440 | 143 | { |
664d080c | 144 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
145 | int wait = 0; |
146 | unsigned long flags; | |
f730ae18 | 147 | acpi_handle handle; |
c85665ff | 148 | |
f730ae18 | 149 | if (dev) |
ae6c23c4 | 150 | handle = dev->acpi_handle; |
f730ae18 | 151 | else |
ae6c23c4 | 152 | handle = ap->acpi_handle; |
3c1e3896 | 153 | |
664d080c | 154 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
155 | /* |
156 | * When dock driver calls into the routine, it will always use | |
157 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
158 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
159 | */ | |
233f1120 TH |
160 | switch (event) { |
161 | case ACPI_NOTIFY_BUS_CHECK: | |
162 | case ACPI_NOTIFY_DEVICE_CHECK: | |
163 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 164 | |
f730ae18 SL |
165 | ata_ehi_hotplugged(ehi); |
166 | ata_port_freeze(ap); | |
664d080c HM |
167 | break; |
168 | case ACPI_NOTIFY_EJECT_REQUEST: | |
169 | ata_ehi_push_desc(ehi, "ACPI event"); | |
170 | ||
664d080c HM |
171 | ata_acpi_detach_device(ap, dev); |
172 | wait = 1; | |
173 | break; | |
237d8440 MG |
174 | } |
175 | ||
ae6c23c4 MG |
176 | spin_unlock_irqrestore(ap->lock, flags); |
177 | ||
f730ae18 | 178 | if (wait) |
ae6c23c4 | 179 | ata_port_wait_eh(ap); |
664d080c HM |
180 | } |
181 | ||
182 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
183 | { | |
184 | struct ata_device *dev = data; | |
185 | ||
f730ae18 | 186 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
187 | } |
188 | ||
189 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
190 | { | |
191 | struct ata_port *ap = data; | |
192 | ||
f730ae18 | 193 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
194 | } |
195 | ||
1253f7aa SL |
196 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
197 | u32 event) | |
198 | { | |
199 | struct kobject *kobj = NULL; | |
200 | char event_string[20]; | |
201 | char *envp[] = { event_string, NULL }; | |
202 | ||
203 | if (dev) { | |
204 | if (dev->sdev) | |
205 | kobj = &dev->sdev->sdev_gendev.kobj; | |
206 | } else | |
207 | kobj = &ap->dev->kobj; | |
208 | ||
209 | if (kobj) { | |
210 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
211 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
212 | } | |
213 | } | |
214 | ||
215 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
216 | { | |
217 | ata_acpi_uevent(data, NULL, event); | |
218 | } | |
219 | ||
220 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
221 | { | |
222 | struct ata_device *dev = data; | |
223 | ata_acpi_uevent(dev->link->ap, dev, event); | |
224 | } | |
225 | ||
226 | static struct acpi_dock_ops ata_acpi_dev_dock_ops = { | |
227 | .handler = ata_acpi_dev_notify_dock, | |
228 | .uevent = ata_acpi_dev_uevent, | |
229 | }; | |
230 | ||
231 | static struct acpi_dock_ops ata_acpi_ap_dock_ops = { | |
232 | .handler = ata_acpi_ap_notify_dock, | |
233 | .uevent = ata_acpi_ap_uevent, | |
234 | }; | |
235 | ||
fafbae87 TH |
236 | /** |
237 | * ata_acpi_associate - associate ATA host with ACPI objects | |
238 | * @host: target ATA host | |
239 | * | |
240 | * Look up ACPI objects associated with @host and initialize | |
241 | * acpi_handle fields of @host, its ports and devices accordingly. | |
242 | * | |
243 | * LOCKING: | |
244 | * EH context. | |
245 | * | |
246 | * RETURNS: | |
247 | * 0 on success, -errno on failure. | |
248 | */ | |
249 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 250 | { |
237d8440 | 251 | int i, j; |
11ef697b | 252 | |
fafbae87 TH |
253 | if (!is_pci_dev(host->dev) || libata_noacpi) |
254 | return; | |
11ef697b | 255 | |
fafbae87 TH |
256 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
257 | if (!host->acpi_handle) | |
258 | return; | |
11ef697b | 259 | |
fafbae87 TH |
260 | for (i = 0; i < host->n_ports; i++) { |
261 | struct ata_port *ap = host->ports[i]; | |
262 | ||
263 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
264 | ata_acpi_associate_sata_port(ap); | |
265 | else | |
266 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 267 | |
233f1120 | 268 | if (ap->acpi_handle) { |
233f1120 TH |
269 | /* we might be on a docking station */ |
270 | register_hotplug_dock_device(ap->acpi_handle, | |
1253f7aa | 271 | &ata_acpi_ap_dock_ops, ap); |
233f1120 | 272 | } |
237d8440 MG |
273 | |
274 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
275 | struct ata_device *dev = &ap->link.device[j]; | |
276 | ||
233f1120 | 277 | if (dev->acpi_handle) { |
233f1120 TH |
278 | /* we might be on a docking station */ |
279 | register_hotplug_dock_device(dev->acpi_handle, | |
1253f7aa | 280 | &ata_acpi_dev_dock_ops, dev); |
233f1120 | 281 | } |
237d8440 | 282 | } |
11ef697b | 283 | } |
11ef697b KCA |
284 | } |
285 | ||
562f0c2d TH |
286 | /** |
287 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
288 | * @host: target ATA host | |
289 | * | |
290 | * This function is called during driver detach after the whole host | |
291 | * is shut down. | |
292 | * | |
293 | * LOCKING: | |
294 | * EH context. | |
295 | */ | |
296 | void ata_acpi_dissociate(struct ata_host *host) | |
297 | { | |
c05e6ff0 TH |
298 | int i; |
299 | ||
300 | /* Restore initial _GTM values so that driver which attaches | |
301 | * afterward can use them too. | |
302 | */ | |
303 | for (i = 0; i < host->n_ports; i++) { | |
304 | struct ata_port *ap = host->ports[i]; | |
305 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
306 | ||
307 | if (ap->acpi_handle && gtm) | |
308 | ata_acpi_stm(ap, gtm); | |
309 | } | |
562f0c2d TH |
310 | } |
311 | ||
64578a3d TH |
312 | /** |
313 | * ata_acpi_gtm - execute _GTM | |
314 | * @ap: target ATA port | |
315 | * @gtm: out parameter for _GTM result | |
316 | * | |
317 | * Evaluate _GTM and store the result in @gtm. | |
318 | * | |
319 | * LOCKING: | |
320 | * EH context. | |
321 | * | |
322 | * RETURNS: | |
323 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
324 | */ | |
0d02f0b2 | 325 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
326 | { |
327 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
328 | union acpi_object *out_obj; | |
329 | acpi_status status; | |
330 | int rc = 0; | |
331 | ||
332 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
333 | ||
334 | rc = -ENOENT; | |
335 | if (status == AE_NOT_FOUND) | |
336 | goto out_free; | |
337 | ||
338 | rc = -EINVAL; | |
339 | if (ACPI_FAILURE(status)) { | |
340 | ata_port_printk(ap, KERN_ERR, | |
341 | "ACPI get timing mode failed (AE 0x%x)\n", | |
342 | status); | |
343 | goto out_free; | |
344 | } | |
345 | ||
346 | out_obj = output.pointer; | |
347 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
348 | ata_port_printk(ap, KERN_WARNING, | |
349 | "_GTM returned unexpected object type 0x%x\n", | |
350 | out_obj->type); | |
351 | ||
352 | goto out_free; | |
353 | } | |
354 | ||
355 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
356 | ata_port_printk(ap, KERN_ERR, | |
357 | "_GTM returned invalid length %d\n", | |
358 | out_obj->buffer.length); | |
359 | goto out_free; | |
360 | } | |
361 | ||
362 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
363 | rc = 0; | |
364 | out_free: | |
365 | kfree(output.pointer); | |
366 | return rc; | |
367 | } | |
368 | ||
badff03d AC |
369 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
370 | ||
64578a3d TH |
371 | /** |
372 | * ata_acpi_stm - execute _STM | |
373 | * @ap: target ATA port | |
374 | * @stm: timing parameter to _STM | |
375 | * | |
376 | * Evaluate _STM with timing parameter @stm. | |
377 | * | |
378 | * LOCKING: | |
379 | * EH context. | |
380 | * | |
381 | * RETURNS: | |
382 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
383 | */ | |
0d02f0b2 | 384 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
385 | { |
386 | acpi_status status; | |
0d02f0b2 | 387 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
388 | struct acpi_object_list input; |
389 | union acpi_object in_params[3]; | |
390 | ||
391 | in_params[0].type = ACPI_TYPE_BUFFER; | |
392 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 393 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
394 | /* Buffers for id may need byteswapping ? */ |
395 | in_params[1].type = ACPI_TYPE_BUFFER; | |
396 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 397 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
398 | in_params[2].type = ACPI_TYPE_BUFFER; |
399 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 400 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
401 | |
402 | input.count = 3; | |
403 | input.pointer = in_params; | |
404 | ||
405 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
406 | ||
407 | if (status == AE_NOT_FOUND) | |
408 | return -ENOENT; | |
409 | if (ACPI_FAILURE(status)) { | |
410 | ata_port_printk(ap, KERN_ERR, | |
411 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
412 | return -EINVAL; | |
413 | } | |
414 | return 0; | |
415 | } | |
416 | ||
badff03d AC |
417 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
418 | ||
11ef697b | 419 | /** |
4700c4bc | 420 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 421 | * @dev: target ATA device |
4700c4bc | 422 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
423 | * |
424 | * This applies to both PATA and SATA drives. | |
425 | * | |
426 | * The _GTF method has no input parameters. | |
427 | * It returns a variable number of register set values (registers | |
428 | * hex 1F1..1F7, taskfiles). | |
429 | * The <variable number> is not known in advance, so have ACPI-CA | |
430 | * allocate the buffer as needed and return it, then free it later. | |
431 | * | |
4700c4bc TH |
432 | * LOCKING: |
433 | * EH context. | |
434 | * | |
435 | * RETURNS: | |
66fa7f21 TH |
436 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
437 | * if _GTF is invalid. | |
11ef697b | 438 | */ |
398e0782 | 439 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 440 | { |
9af5c9c9 | 441 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 442 | acpi_status status; |
3a32a8e9 TH |
443 | struct acpi_buffer output; |
444 | union acpi_object *out_obj; | |
4700c4bc | 445 | int rc = 0; |
11ef697b | 446 | |
398e0782 TH |
447 | /* if _GTF is cached, use the cached value */ |
448 | if (dev->gtf_cache) { | |
449 | out_obj = dev->gtf_cache; | |
450 | goto done; | |
451 | } | |
452 | ||
4700c4bc TH |
453 | /* set up output buffer */ |
454 | output.length = ACPI_ALLOCATE_BUFFER; | |
455 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 456 | |
11ef697b | 457 | if (ata_msg_probe(ap)) |
3a32a8e9 | 458 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 459 | __func__, ap->port_no); |
11ef697b | 460 | |
11ef697b | 461 | /* _GTF has no input parameters */ |
4700c4bc | 462 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 463 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 464 | |
11ef697b | 465 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
466 | if (status != AE_NOT_FOUND) { |
467 | ata_dev_printk(dev, KERN_WARNING, | |
468 | "_GTF evaluation failed (AE 0x%x)\n", | |
469 | status); | |
66fa7f21 | 470 | rc = -EINVAL; |
4700c4bc TH |
471 | } |
472 | goto out_free; | |
11ef697b KCA |
473 | } |
474 | ||
475 | if (!output.length || !output.pointer) { | |
476 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 477 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 478 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 479 | __func__, |
11ef697b KCA |
480 | (unsigned long long)output.length, |
481 | output.pointer); | |
66fa7f21 | 482 | rc = -EINVAL; |
4700c4bc | 483 | goto out_free; |
11ef697b KCA |
484 | } |
485 | ||
11ef697b | 486 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
487 | ata_dev_printk(dev, KERN_WARNING, |
488 | "_GTF unexpected object type 0x%x\n", | |
489 | out_obj->type); | |
66fa7f21 | 490 | rc = -EINVAL; |
4700c4bc | 491 | goto out_free; |
11ef697b KCA |
492 | } |
493 | ||
4700c4bc | 494 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
495 | ata_dev_printk(dev, KERN_WARNING, |
496 | "unexpected _GTF length (%d)\n", | |
497 | out_obj->buffer.length); | |
66fa7f21 | 498 | rc = -EINVAL; |
4700c4bc | 499 | goto out_free; |
11ef697b KCA |
500 | } |
501 | ||
398e0782 | 502 | done: |
4700c4bc | 503 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
504 | if (gtf) { |
505 | *gtf = (void *)out_obj->buffer.pointer; | |
506 | if (ata_msg_probe(ap)) | |
507 | ata_dev_printk(dev, KERN_DEBUG, | |
508 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 509 | __func__, *gtf, rc); |
398e0782 | 510 | } |
4700c4bc TH |
511 | return rc; |
512 | ||
513 | out_free: | |
398e0782 | 514 | ata_acpi_clear_gtf(dev); |
4700c4bc | 515 | return rc; |
11ef697b KCA |
516 | } |
517 | ||
7c77fa4d TH |
518 | /** |
519 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
520 | * @dev: target device | |
521 | * @gtm: GTM parameter to use | |
522 | * | |
523 | * Determine xfermask for @dev from @gtm. | |
524 | * | |
525 | * LOCKING: | |
526 | * None. | |
527 | * | |
528 | * RETURNS: | |
529 | * Determined xfermask. | |
530 | */ | |
531 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
532 | const struct ata_acpi_gtm *gtm) | |
533 | { | |
a0f79b92 TH |
534 | unsigned long xfer_mask = 0; |
535 | unsigned int type; | |
536 | int unit; | |
537 | u8 mode; | |
7c77fa4d TH |
538 | |
539 | /* we always use the 0 slot for crap hardware */ | |
540 | unit = dev->devno; | |
541 | if (!(gtm->flags & 0x10)) | |
542 | unit = 0; | |
543 | ||
a0f79b92 TH |
544 | /* PIO */ |
545 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
546 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
547 | |
548 | /* See if we have MWDMA or UDMA data. We don't bother with | |
549 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
550 | * and our error changedown if it works is UDMA to PIO anyway. | |
551 | */ | |
a0f79b92 TH |
552 | if (!(gtm->flags & (1 << (2 * unit)))) |
553 | type = ATA_SHIFT_MWDMA; | |
554 | else | |
555 | type = ATA_SHIFT_UDMA; | |
556 | ||
557 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
558 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 559 | |
a0f79b92 | 560 | return xfer_mask; |
7c77fa4d TH |
561 | } |
562 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
563 | ||
e1ddb4b6 AC |
564 | /** |
565 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
566 | * @ap: Port to check | |
021ee9a6 | 567 | * @gtm: GTM data to use |
e1ddb4b6 | 568 | * |
021ee9a6 | 569 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 570 | */ |
021ee9a6 | 571 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 572 | { |
021ee9a6 TH |
573 | struct ata_device *dev; |
574 | ||
1eca4365 | 575 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
576 | unsigned long xfer_mask, udma_mask; |
577 | ||
021ee9a6 TH |
578 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
579 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
580 | ||
581 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
582 | return 1; | |
583 | } | |
584 | ||
e1ddb4b6 AC |
585 | return 0; |
586 | } | |
e1ddb4b6 AC |
587 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
588 | ||
3264a8d8 TH |
589 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
590 | const struct ata_acpi_gtf *gtf, | |
591 | struct ata_taskfile *tf) | |
592 | { | |
593 | ata_tf_init(dev, tf); | |
594 | ||
595 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
596 | tf->protocol = ATA_PROT_NODATA; | |
597 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
598 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
599 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
600 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
601 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
602 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
603 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
604 | } | |
605 | ||
110f66d2 TH |
606 | static int ata_acpi_filter_tf(struct ata_device *dev, |
607 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
608 | const struct ata_taskfile *ptf) |
609 | { | |
110f66d2 | 610 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
611 | /* libata doesn't use ACPI to configure transfer mode. |
612 | * It will only confuse device configuration. Skip. | |
613 | */ | |
614 | if (tf->command == ATA_CMD_SET_FEATURES && | |
615 | tf->feature == SETFEATURES_XFER) | |
616 | return 1; | |
617 | } | |
618 | ||
110f66d2 | 619 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
620 | /* BIOS writers, sorry but we don't wanna lock |
621 | * features unless the user explicitly said so. | |
622 | */ | |
623 | ||
624 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
625 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
626 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
627 | return 1; | |
628 | ||
629 | /* SECURITY FREEZE LOCK */ | |
630 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
631 | return 1; | |
632 | ||
633 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
634 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
635 | tf->command == ATA_CMD_SET_MAX && | |
636 | (tf->feature == ATA_SET_MAX_LOCK || | |
637 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
638 | return 1; | |
639 | } | |
640 | ||
fa5b561c TH |
641 | if (tf->command == ATA_CMD_SET_FEATURES && |
642 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 643 | /* inhibit enabling DIPM */ |
110f66d2 | 644 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
645 | tf->nsect == SATA_DIPM) |
646 | return 1; | |
fa5b561c TH |
647 | |
648 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 649 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
650 | (tf->nsect == SATA_FPDMA_OFFSET || |
651 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
652 | return 1; | |
653 | ||
654 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 655 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
656 | tf->nsect == SATA_FPDMA_AA) |
657 | return 1; | |
b344991a TH |
658 | } |
659 | ||
3264a8d8 TH |
660 | return 0; |
661 | } | |
662 | ||
11ef697b | 663 | /** |
0e8634bf | 664 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 665 | * @dev: target ATA device |
11ef697b KCA |
666 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
667 | * | |
668 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
669 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
670 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
671 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
672 | * hob_lbal, hob_lbam, and hob_lbah. | |
673 | * | |
674 | * This function waits for idle (!BUSY and !DRQ) after writing | |
675 | * registers. If the control register has a new value, this | |
676 | * function also waits for idle after writing control and before | |
677 | * writing the remaining registers. | |
678 | * | |
4700c4bc TH |
679 | * LOCKING: |
680 | * EH context. | |
681 | * | |
682 | * RETURNS: | |
3264a8d8 TH |
683 | * 1 if command is executed successfully. 0 if ignored, rejected or |
684 | * filtered out, -errno on other errors. | |
11ef697b | 685 | */ |
0e8634bf | 686 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
687 | const struct ata_acpi_gtf *gtf, |
688 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 689 | { |
3264a8d8 TH |
690 | struct ata_taskfile *pptf = NULL; |
691 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 692 | unsigned int err_mask; |
0e8634bf | 693 | const char *level; |
6521148c | 694 | const char *descr; |
0e8634bf TH |
695 | char msg[60]; |
696 | int rc; | |
fc16c25f | 697 | |
4700c4bc TH |
698 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
699 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
700 | && (gtf->tf[6] == 0)) | |
701 | return 0; | |
11ef697b | 702 | |
3264a8d8 TH |
703 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
704 | if (prev_gtf) { | |
705 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
706 | pptf = &ptf; | |
707 | } | |
708 | ||
110f66d2 | 709 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
710 | rtf = tf; |
711 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
712 | DMA_NONE, NULL, 0, 0); | |
713 | ||
714 | switch (err_mask) { | |
715 | case 0: | |
716 | level = KERN_DEBUG; | |
717 | snprintf(msg, sizeof(msg), "succeeded"); | |
718 | rc = 1; | |
719 | break; | |
720 | ||
721 | case AC_ERR_DEV: | |
722 | level = KERN_INFO; | |
723 | snprintf(msg, sizeof(msg), | |
724 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
725 | rtf.command, rtf.feature); | |
726 | rc = 0; | |
727 | break; | |
728 | ||
729 | default: | |
730 | level = KERN_ERR; | |
731 | snprintf(msg, sizeof(msg), | |
732 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
733 | err_mask, rtf.command, rtf.feature); | |
734 | rc = -EIO; | |
735 | break; | |
736 | } | |
737 | } else { | |
0e8634bf | 738 | level = KERN_INFO; |
3264a8d8 | 739 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 740 | rc = 0; |
4700c4bc | 741 | } |
6521148c | 742 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 743 | |
0e8634bf | 744 | ata_dev_printk(dev, level, |
6521148c | 745 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 746 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
747 | tf.lbam, tf.lbah, tf.device, |
748 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
749 | |
750 | return rc; | |
11ef697b KCA |
751 | } |
752 | ||
11ef697b KCA |
753 | /** |
754 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 755 | * @dev: target ATA device |
98a1708d | 756 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 757 | * |
98a1708d | 758 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
759 | * |
760 | * LOCKING: | |
761 | * EH context. | |
762 | * | |
763 | * RETURNS: | |
66fa7f21 TH |
764 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
765 | * -errno on other errors. | |
11ef697b | 766 | */ |
66fa7f21 | 767 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 768 | { |
3264a8d8 | 769 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
770 | int gtf_count, i, rc; |
771 | ||
772 | /* get taskfiles */ | |
66fa7f21 TH |
773 | rc = ata_dev_get_GTF(dev, >f); |
774 | if (rc < 0) | |
775 | return rc; | |
776 | gtf_count = rc; | |
6746544c TH |
777 | |
778 | /* execute them */ | |
3264a8d8 TH |
779 | for (i = 0; i < gtf_count; i++, gtf++) { |
780 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
781 | if (rc < 0) |
782 | break; | |
3264a8d8 | 783 | if (rc) { |
0e8634bf | 784 | (*nr_executed)++; |
3264a8d8 TH |
785 | pgtf = gtf; |
786 | } | |
11ef697b KCA |
787 | } |
788 | ||
398e0782 | 789 | ata_acpi_clear_gtf(dev); |
6746544c | 790 | |
0e8634bf TH |
791 | if (rc < 0) |
792 | return rc; | |
793 | return 0; | |
11ef697b KCA |
794 | } |
795 | ||
7ea1fbc2 KCA |
796 | /** |
797 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 798 | * @dev: target ATA device |
7ea1fbc2 KCA |
799 | * |
800 | * _SDD ACPI object: for SATA mode only | |
801 | * Must be after Identify (Packet) Device -- uses its data | |
802 | * ATM this function never returns a failure. It is an optional | |
803 | * method and if it fails for whatever reason, we should still | |
804 | * just keep going. | |
69b16a5f TH |
805 | * |
806 | * LOCKING: | |
807 | * EH context. | |
808 | * | |
809 | * RETURNS: | |
f2406770 | 810 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 811 | */ |
6746544c | 812 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 813 | { |
9af5c9c9 | 814 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
815 | acpi_status status; |
816 | struct acpi_object_list input; | |
817 | union acpi_object in_params[1]; | |
7ea1fbc2 | 818 | |
7ea1fbc2 | 819 | if (ata_msg_probe(ap)) |
3a32a8e9 | 820 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 821 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 822 | |
7ea1fbc2 KCA |
823 | /* Give the drive Identify data to the drive via the _SDD method */ |
824 | /* _SDD: set up input parameters */ | |
825 | input.count = 1; | |
826 | input.pointer = in_params; | |
827 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
828 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
829 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
830 | /* Output buffer: _SDD has no output */ |
831 | ||
832 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 833 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 834 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 835 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 836 | |
f2406770 TH |
837 | if (status == AE_NOT_FOUND) |
838 | return -ENOENT; | |
839 | ||
840 | if (ACPI_FAILURE(status)) { | |
69b16a5f TH |
841 | ata_dev_printk(dev, KERN_WARNING, |
842 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
f2406770 TH |
843 | return -EIO; |
844 | } | |
7ea1fbc2 | 845 | |
f2406770 | 846 | return 0; |
6746544c TH |
847 | } |
848 | ||
64578a3d TH |
849 | /** |
850 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
851 | * @ap: target ATA port | |
852 | * | |
853 | * This function is called when @ap is about to be suspended. All | |
854 | * devices are already put to sleep but the port_suspend() callback | |
855 | * hasn't been executed yet. Error return from this function aborts | |
856 | * suspend. | |
857 | * | |
858 | * LOCKING: | |
859 | * EH context. | |
860 | * | |
861 | * RETURNS: | |
862 | * 0 on success, -errno on failure. | |
863 | */ | |
864 | int ata_acpi_on_suspend(struct ata_port *ap) | |
865 | { | |
c05e6ff0 TH |
866 | /* nada */ |
867 | return 0; | |
64578a3d TH |
868 | } |
869 | ||
6746544c TH |
870 | /** |
871 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
872 | * @ap: target ATA port | |
873 | * | |
874 | * This function is called when @ap is resumed - right after port | |
875 | * itself is resumed but before any EH action is taken. | |
876 | * | |
877 | * LOCKING: | |
878 | * EH context. | |
879 | */ | |
880 | void ata_acpi_on_resume(struct ata_port *ap) | |
881 | { | |
c05e6ff0 | 882 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 883 | struct ata_device *dev; |
6746544c | 884 | |
398e0782 TH |
885 | if (ap->acpi_handle && gtm) { |
886 | /* _GTM valid */ | |
887 | ||
888 | /* restore timing parameters */ | |
c05e6ff0 | 889 | ata_acpi_stm(ap, gtm); |
64578a3d | 890 | |
398e0782 TH |
891 | /* _GTF should immediately follow _STM so that it can |
892 | * use values set by _STM. Cache _GTF result and | |
893 | * schedule _GTF. | |
894 | */ | |
1eca4365 | 895 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 896 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
897 | if (ata_dev_enabled(dev) && |
898 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
899 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
900 | } | |
901 | } else { | |
902 | /* SATA _GTF needs to be evaulated after _SDD and | |
903 | * there's no reason to evaluate IDE _GTF early | |
904 | * without _STM. Clear cache and schedule _GTF. | |
905 | */ | |
1eca4365 | 906 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 907 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
908 | if (ata_dev_enabled(dev)) |
909 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
910 | } |
911 | } | |
7ea1fbc2 KCA |
912 | } |
913 | ||
bd3adca5 SL |
914 | /** |
915 | * ata_acpi_set_state - set the port power state | |
916 | * @ap: target ATA port | |
917 | * @state: state, on/off | |
918 | * | |
919 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
920 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
921 | */ | |
922 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
923 | { | |
924 | struct ata_device *dev; | |
925 | ||
926 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
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_ON) | |
932 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
933 | ||
1eca4365 TH |
934 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
935 | if (dev->acpi_handle) | |
bd3adca5 SL |
936 | acpi_bus_set_power(dev->acpi_handle, |
937 | state.event == PM_EVENT_ON ? | |
938 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
939 | } | |
940 | if (state.event != PM_EVENT_ON) | |
941 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
942 | } | |
943 | ||
6746544c TH |
944 | /** |
945 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
946 | * @dev: target ATA device | |
947 | * | |
948 | * This function is called when @dev is about to be configured. | |
949 | * IDENTIFY data might have been modified after this hook is run. | |
950 | * | |
951 | * LOCKING: | |
952 | * EH context. | |
953 | * | |
954 | * RETURNS: | |
955 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
956 | * -errno on failure. | |
957 | */ | |
958 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
959 | { | |
9af5c9c9 TH |
960 | struct ata_port *ap = dev->link->ap; |
961 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 962 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 963 | int nr_executed = 0; |
6746544c TH |
964 | int rc; |
965 | ||
6746544c TH |
966 | if (!dev->acpi_handle) |
967 | return 0; | |
968 | ||
969 | /* do we need to do _GTF? */ | |
970 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
971 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
972 | return 0; | |
973 | ||
974 | /* do _SDD if SATA */ | |
975 | if (acpi_sata) { | |
976 | rc = ata_acpi_push_id(dev); | |
f2406770 | 977 | if (rc && rc != -ENOENT) |
6746544c TH |
978 | goto acpi_err; |
979 | } | |
980 | ||
981 | /* do _GTF */ | |
66fa7f21 TH |
982 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
983 | if (rc) | |
6746544c TH |
984 | goto acpi_err; |
985 | ||
986 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
987 | ||
988 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 989 | if (nr_executed) { |
6746544c TH |
990 | rc = ata_dev_reread_id(dev, 0); |
991 | if (rc < 0) { | |
992 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
993 | "after ACPI commands\n"); | |
994 | return rc; | |
995 | } | |
996 | } | |
997 | ||
998 | return 0; | |
999 | ||
1000 | acpi_err: | |
66fa7f21 TH |
1001 | /* ignore evaluation failure if we can continue safely */ |
1002 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1003 | return 0; | |
6746544c | 1004 | |
66fa7f21 TH |
1005 | /* fail and let EH retry once more for unknown IO errors */ |
1006 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1007 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1008 | return rc; | |
6746544c | 1009 | } |
66fa7f21 TH |
1010 | |
1011 | ata_dev_printk(dev, KERN_WARNING, | |
1012 | "ACPI: failed the second time, disabled\n"); | |
1013 | dev->acpi_handle = NULL; | |
1014 | ||
1015 | /* We can safely continue if no _GTF command has been executed | |
1016 | * and port is not frozen. | |
1017 | */ | |
1018 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1019 | return 0; | |
1020 | ||
6746544c TH |
1021 | return rc; |
1022 | } | |
562f0c2d TH |
1023 | |
1024 | /** | |
1025 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1026 | * @dev: target ATA device | |
1027 | * | |
1028 | * This function is called when @dev is about to be disabled. | |
1029 | * | |
1030 | * LOCKING: | |
1031 | * EH context. | |
1032 | */ | |
1033 | void ata_acpi_on_disable(struct ata_device *dev) | |
1034 | { | |
398e0782 | 1035 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1036 | } |