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> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
237d8440 | 19 | #include <scsi/scsi_device.h> |
11ef697b KCA |
20 | #include "libata.h" |
21 | ||
22 | #include <acpi/acpi_bus.h> | |
11ef697b | 23 | |
110f66d2 | 24 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 25 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 26 | 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 | 27 | |
11ef697b | 28 | #define NO_PORT_MULT 0xffff |
2dcb407e | 29 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
30 | |
31 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
32 | struct ata_acpi_gtf { |
33 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
34 | } __packed; | |
11ef697b | 35 | |
ca426635 AC |
36 | /* |
37 | * Helper - belongs in the PCI layer somewhere eventually | |
38 | */ | |
39 | static int is_pci_dev(struct device *dev) | |
40 | { | |
41 | return (dev->bus == &pci_bus_type); | |
42 | } | |
11ef697b | 43 | |
398e0782 TH |
44 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
45 | { | |
46 | kfree(dev->gtf_cache); | |
47 | dev->gtf_cache = NULL; | |
48 | } | |
49 | ||
d0df8b5d TH |
50 | /** |
51 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
52 | * @ap: target SATA port | |
53 | * | |
54 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
55 | * fields of @ap, the port and devices accordingly. | |
56 | * | |
57 | * LOCKING: | |
58 | * EH context. | |
59 | * | |
60 | * RETURNS: | |
61 | * 0 on success, -errno on failure. | |
62 | */ | |
63 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 64 | { |
d0df8b5d TH |
65 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
66 | ||
071f44b1 | 67 | if (!sata_pmp_attached(ap)) { |
439913ff | 68 | u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
d0df8b5d TH |
69 | |
70 | ap->link.device->acpi_handle = | |
71 | acpi_get_child(ap->host->acpi_handle, adr); | |
72 | } else { | |
73 | struct ata_link *link; | |
74 | ||
75 | ap->link.device->acpi_handle = NULL; | |
76 | ||
1eca4365 | 77 | ata_for_each_link(link, ap, EDGE) { |
439913ff | 78 | u64 adr = SATA_ADR(ap->port_no, link->pmp); |
fafbae87 | 79 | |
d0df8b5d TH |
80 | link->device->acpi_handle = |
81 | acpi_get_child(ap->host->acpi_handle, adr); | |
82 | } | |
83 | } | |
11ef697b KCA |
84 | } |
85 | ||
fafbae87 | 86 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 87 | { |
fafbae87 | 88 | int max_devices, i; |
11ef697b | 89 | |
fafbae87 TH |
90 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
91 | if (!ap->acpi_handle) | |
92 | return; | |
11ef697b | 93 | |
fafbae87 TH |
94 | max_devices = 1; |
95 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
96 | max_devices++; | |
11ef697b | 97 | |
fafbae87 | 98 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 99 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 100 | |
fafbae87 | 101 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 102 | } |
c05e6ff0 TH |
103 | |
104 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
105 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
106 | } |
107 | ||
664d080c HM |
108 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
109 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
110 | { | |
111 | if (dev) | |
112 | dev->flags |= ATA_DFLAG_DETACH; | |
113 | else { | |
114 | struct ata_link *tlink; | |
115 | struct ata_device *tdev; | |
116 | ||
1eca4365 TH |
117 | ata_for_each_link(tlink, ap, EDGE) |
118 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
119 | tdev->flags |= ATA_DFLAG_DETACH; |
120 | } | |
121 | ||
122 | ata_port_schedule_eh(ap); | |
123 | } | |
124 | ||
125 | /** | |
126 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
127 | * @ap: ATA port ACPI event occurred | |
128 | * @dev: ATA device ACPI event occurred (can be NULL) | |
129 | * @event: ACPI event which occurred | |
664d080c HM |
130 | * |
131 | * All ACPI bay / device realted events end up in this function. If | |
132 | * the event is port-wide @dev is NULL. If the event is specific to a | |
133 | * device, @dev points to it. | |
134 | * | |
135 | * Hotplug (as opposed to unplug) notification is always handled as | |
136 | * port-wide while unplug only kills the target device on device-wide | |
137 | * event. | |
138 | * | |
139 | * LOCKING: | |
140 | * ACPI notify handler context. May sleep. | |
141 | */ | |
142 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 143 | u32 event) |
237d8440 | 144 | { |
664d080c | 145 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
146 | int wait = 0; |
147 | unsigned long flags; | |
f730ae18 | 148 | acpi_handle handle; |
c85665ff | 149 | |
f730ae18 | 150 | if (dev) |
ae6c23c4 | 151 | handle = dev->acpi_handle; |
f730ae18 | 152 | else |
ae6c23c4 | 153 | handle = ap->acpi_handle; |
3c1e3896 | 154 | |
664d080c | 155 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
156 | /* |
157 | * When dock driver calls into the routine, it will always use | |
158 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
159 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
160 | */ | |
233f1120 TH |
161 | switch (event) { |
162 | case ACPI_NOTIFY_BUS_CHECK: | |
163 | case ACPI_NOTIFY_DEVICE_CHECK: | |
164 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 165 | |
f730ae18 SL |
166 | ata_ehi_hotplugged(ehi); |
167 | ata_port_freeze(ap); | |
664d080c HM |
168 | break; |
169 | case ACPI_NOTIFY_EJECT_REQUEST: | |
170 | ata_ehi_push_desc(ehi, "ACPI event"); | |
171 | ||
664d080c HM |
172 | ata_acpi_detach_device(ap, dev); |
173 | wait = 1; | |
174 | break; | |
237d8440 MG |
175 | } |
176 | ||
ae6c23c4 MG |
177 | spin_unlock_irqrestore(ap->lock, flags); |
178 | ||
f730ae18 | 179 | if (wait) |
ae6c23c4 | 180 | ata_port_wait_eh(ap); |
664d080c HM |
181 | } |
182 | ||
183 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
184 | { | |
185 | struct ata_device *dev = data; | |
186 | ||
f730ae18 | 187 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
188 | } |
189 | ||
190 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
191 | { | |
192 | struct ata_port *ap = data; | |
193 | ||
f730ae18 | 194 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
195 | } |
196 | ||
1253f7aa SL |
197 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
198 | u32 event) | |
199 | { | |
200 | struct kobject *kobj = NULL; | |
201 | char event_string[20]; | |
202 | char *envp[] = { event_string, NULL }; | |
203 | ||
204 | if (dev) { | |
205 | if (dev->sdev) | |
206 | kobj = &dev->sdev->sdev_gendev.kobj; | |
207 | } else | |
208 | kobj = &ap->dev->kobj; | |
209 | ||
210 | if (kobj) { | |
211 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
212 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
213 | } | |
214 | } | |
215 | ||
216 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
217 | { | |
218 | ata_acpi_uevent(data, NULL, event); | |
219 | } | |
220 | ||
221 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
222 | { | |
223 | struct ata_device *dev = data; | |
224 | ata_acpi_uevent(dev->link->ap, dev, event); | |
225 | } | |
226 | ||
227 | static struct acpi_dock_ops ata_acpi_dev_dock_ops = { | |
228 | .handler = ata_acpi_dev_notify_dock, | |
229 | .uevent = ata_acpi_dev_uevent, | |
230 | }; | |
231 | ||
232 | static struct acpi_dock_ops ata_acpi_ap_dock_ops = { | |
233 | .handler = ata_acpi_ap_notify_dock, | |
234 | .uevent = ata_acpi_ap_uevent, | |
235 | }; | |
236 | ||
fafbae87 TH |
237 | /** |
238 | * ata_acpi_associate - associate ATA host with ACPI objects | |
239 | * @host: target ATA host | |
240 | * | |
241 | * Look up ACPI objects associated with @host and initialize | |
242 | * acpi_handle fields of @host, its ports and devices accordingly. | |
243 | * | |
244 | * LOCKING: | |
245 | * EH context. | |
246 | * | |
247 | * RETURNS: | |
248 | * 0 on success, -errno on failure. | |
249 | */ | |
250 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 251 | { |
237d8440 | 252 | int i, j; |
11ef697b | 253 | |
fafbae87 TH |
254 | if (!is_pci_dev(host->dev) || libata_noacpi) |
255 | return; | |
11ef697b | 256 | |
fafbae87 TH |
257 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
258 | if (!host->acpi_handle) | |
259 | return; | |
11ef697b | 260 | |
fafbae87 TH |
261 | for (i = 0; i < host->n_ports; i++) { |
262 | struct ata_port *ap = host->ports[i]; | |
263 | ||
264 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
265 | ata_acpi_associate_sata_port(ap); | |
266 | else | |
267 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 268 | |
233f1120 | 269 | if (ap->acpi_handle) { |
233f1120 TH |
270 | /* we might be on a docking station */ |
271 | register_hotplug_dock_device(ap->acpi_handle, | |
1253f7aa | 272 | &ata_acpi_ap_dock_ops, ap); |
233f1120 | 273 | } |
237d8440 MG |
274 | |
275 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
276 | struct ata_device *dev = &ap->link.device[j]; | |
277 | ||
233f1120 | 278 | if (dev->acpi_handle) { |
233f1120 TH |
279 | /* we might be on a docking station */ |
280 | register_hotplug_dock_device(dev->acpi_handle, | |
1253f7aa | 281 | &ata_acpi_dev_dock_ops, dev); |
233f1120 | 282 | } |
237d8440 | 283 | } |
11ef697b | 284 | } |
11ef697b KCA |
285 | } |
286 | ||
562f0c2d TH |
287 | /** |
288 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
289 | * @host: target ATA host | |
290 | * | |
291 | * This function is called during driver detach after the whole host | |
292 | * is shut down. | |
293 | * | |
294 | * LOCKING: | |
295 | * EH context. | |
296 | */ | |
297 | void ata_acpi_dissociate(struct ata_host *host) | |
298 | { | |
c05e6ff0 TH |
299 | int i; |
300 | ||
301 | /* Restore initial _GTM values so that driver which attaches | |
302 | * afterward can use them too. | |
303 | */ | |
304 | for (i = 0; i < host->n_ports; i++) { | |
305 | struct ata_port *ap = host->ports[i]; | |
306 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
307 | ||
308 | if (ap->acpi_handle && gtm) | |
309 | ata_acpi_stm(ap, gtm); | |
310 | } | |
562f0c2d TH |
311 | } |
312 | ||
64578a3d TH |
313 | /** |
314 | * ata_acpi_gtm - execute _GTM | |
315 | * @ap: target ATA port | |
316 | * @gtm: out parameter for _GTM result | |
317 | * | |
318 | * Evaluate _GTM and store the result in @gtm. | |
319 | * | |
320 | * LOCKING: | |
321 | * EH context. | |
322 | * | |
323 | * RETURNS: | |
324 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
325 | */ | |
0d02f0b2 | 326 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
327 | { |
328 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
329 | union acpi_object *out_obj; | |
330 | acpi_status status; | |
331 | int rc = 0; | |
332 | ||
333 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
334 | ||
335 | rc = -ENOENT; | |
336 | if (status == AE_NOT_FOUND) | |
337 | goto out_free; | |
338 | ||
339 | rc = -EINVAL; | |
340 | if (ACPI_FAILURE(status)) { | |
341 | ata_port_printk(ap, KERN_ERR, | |
342 | "ACPI get timing mode failed (AE 0x%x)\n", | |
343 | status); | |
344 | goto out_free; | |
345 | } | |
346 | ||
347 | out_obj = output.pointer; | |
348 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
349 | ata_port_printk(ap, KERN_WARNING, | |
350 | "_GTM returned unexpected object type 0x%x\n", | |
351 | out_obj->type); | |
352 | ||
353 | goto out_free; | |
354 | } | |
355 | ||
356 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
357 | ata_port_printk(ap, KERN_ERR, | |
358 | "_GTM returned invalid length %d\n", | |
359 | out_obj->buffer.length); | |
360 | goto out_free; | |
361 | } | |
362 | ||
363 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
364 | rc = 0; | |
365 | out_free: | |
366 | kfree(output.pointer); | |
367 | return rc; | |
368 | } | |
369 | ||
badff03d AC |
370 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
371 | ||
64578a3d TH |
372 | /** |
373 | * ata_acpi_stm - execute _STM | |
374 | * @ap: target ATA port | |
375 | * @stm: timing parameter to _STM | |
376 | * | |
377 | * Evaluate _STM with timing parameter @stm. | |
378 | * | |
379 | * LOCKING: | |
380 | * EH context. | |
381 | * | |
382 | * RETURNS: | |
383 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
384 | */ | |
0d02f0b2 | 385 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
386 | { |
387 | acpi_status status; | |
0d02f0b2 | 388 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
389 | struct acpi_object_list input; |
390 | union acpi_object in_params[3]; | |
391 | ||
392 | in_params[0].type = ACPI_TYPE_BUFFER; | |
393 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 394 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
395 | /* Buffers for id may need byteswapping ? */ |
396 | in_params[1].type = ACPI_TYPE_BUFFER; | |
397 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 398 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
399 | in_params[2].type = ACPI_TYPE_BUFFER; |
400 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 401 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
402 | |
403 | input.count = 3; | |
404 | input.pointer = in_params; | |
405 | ||
406 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
407 | ||
408 | if (status == AE_NOT_FOUND) | |
409 | return -ENOENT; | |
410 | if (ACPI_FAILURE(status)) { | |
411 | ata_port_printk(ap, KERN_ERR, | |
412 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
413 | return -EINVAL; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
badff03d AC |
418 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
419 | ||
11ef697b | 420 | /** |
4700c4bc | 421 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 422 | * @dev: target ATA device |
4700c4bc | 423 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
424 | * |
425 | * This applies to both PATA and SATA drives. | |
426 | * | |
427 | * The _GTF method has no input parameters. | |
428 | * It returns a variable number of register set values (registers | |
429 | * hex 1F1..1F7, taskfiles). | |
430 | * The <variable number> is not known in advance, so have ACPI-CA | |
431 | * allocate the buffer as needed and return it, then free it later. | |
432 | * | |
4700c4bc TH |
433 | * LOCKING: |
434 | * EH context. | |
435 | * | |
436 | * RETURNS: | |
66fa7f21 TH |
437 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
438 | * if _GTF is invalid. | |
11ef697b | 439 | */ |
398e0782 | 440 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 441 | { |
9af5c9c9 | 442 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 443 | acpi_status status; |
3a32a8e9 TH |
444 | struct acpi_buffer output; |
445 | union acpi_object *out_obj; | |
4700c4bc | 446 | int rc = 0; |
11ef697b | 447 | |
398e0782 TH |
448 | /* if _GTF is cached, use the cached value */ |
449 | if (dev->gtf_cache) { | |
450 | out_obj = dev->gtf_cache; | |
451 | goto done; | |
452 | } | |
453 | ||
4700c4bc TH |
454 | /* set up output buffer */ |
455 | output.length = ACPI_ALLOCATE_BUFFER; | |
456 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 457 | |
11ef697b | 458 | if (ata_msg_probe(ap)) |
3a32a8e9 | 459 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 460 | __func__, ap->port_no); |
11ef697b | 461 | |
11ef697b | 462 | /* _GTF has no input parameters */ |
4700c4bc | 463 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 464 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 465 | |
11ef697b | 466 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
467 | if (status != AE_NOT_FOUND) { |
468 | ata_dev_printk(dev, KERN_WARNING, | |
469 | "_GTF evaluation failed (AE 0x%x)\n", | |
470 | status); | |
66fa7f21 | 471 | rc = -EINVAL; |
4700c4bc TH |
472 | } |
473 | goto out_free; | |
11ef697b KCA |
474 | } |
475 | ||
476 | if (!output.length || !output.pointer) { | |
477 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 478 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 479 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 480 | __func__, |
11ef697b KCA |
481 | (unsigned long long)output.length, |
482 | output.pointer); | |
66fa7f21 | 483 | rc = -EINVAL; |
4700c4bc | 484 | goto out_free; |
11ef697b KCA |
485 | } |
486 | ||
11ef697b | 487 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
488 | ata_dev_printk(dev, KERN_WARNING, |
489 | "_GTF unexpected object type 0x%x\n", | |
490 | out_obj->type); | |
66fa7f21 | 491 | rc = -EINVAL; |
4700c4bc | 492 | goto out_free; |
11ef697b KCA |
493 | } |
494 | ||
4700c4bc | 495 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
496 | ata_dev_printk(dev, KERN_WARNING, |
497 | "unexpected _GTF length (%d)\n", | |
498 | out_obj->buffer.length); | |
66fa7f21 | 499 | rc = -EINVAL; |
4700c4bc | 500 | goto out_free; |
11ef697b KCA |
501 | } |
502 | ||
398e0782 | 503 | done: |
4700c4bc | 504 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
505 | if (gtf) { |
506 | *gtf = (void *)out_obj->buffer.pointer; | |
507 | if (ata_msg_probe(ap)) | |
508 | ata_dev_printk(dev, KERN_DEBUG, | |
509 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 510 | __func__, *gtf, rc); |
398e0782 | 511 | } |
4700c4bc TH |
512 | return rc; |
513 | ||
514 | out_free: | |
398e0782 | 515 | ata_acpi_clear_gtf(dev); |
4700c4bc | 516 | return rc; |
11ef697b KCA |
517 | } |
518 | ||
7c77fa4d TH |
519 | /** |
520 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
521 | * @dev: target device | |
522 | * @gtm: GTM parameter to use | |
523 | * | |
524 | * Determine xfermask for @dev from @gtm. | |
525 | * | |
526 | * LOCKING: | |
527 | * None. | |
528 | * | |
529 | * RETURNS: | |
530 | * Determined xfermask. | |
531 | */ | |
532 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
533 | const struct ata_acpi_gtm *gtm) | |
534 | { | |
a0f79b92 TH |
535 | unsigned long xfer_mask = 0; |
536 | unsigned int type; | |
537 | int unit; | |
538 | u8 mode; | |
7c77fa4d TH |
539 | |
540 | /* we always use the 0 slot for crap hardware */ | |
541 | unit = dev->devno; | |
542 | if (!(gtm->flags & 0x10)) | |
543 | unit = 0; | |
544 | ||
a0f79b92 TH |
545 | /* PIO */ |
546 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
547 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
548 | |
549 | /* See if we have MWDMA or UDMA data. We don't bother with | |
550 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
551 | * and our error changedown if it works is UDMA to PIO anyway. | |
552 | */ | |
a0f79b92 TH |
553 | if (!(gtm->flags & (1 << (2 * unit)))) |
554 | type = ATA_SHIFT_MWDMA; | |
555 | else | |
556 | type = ATA_SHIFT_UDMA; | |
557 | ||
558 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
559 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 560 | |
a0f79b92 | 561 | return xfer_mask; |
7c77fa4d TH |
562 | } |
563 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
564 | ||
e1ddb4b6 AC |
565 | /** |
566 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
567 | * @ap: Port to check | |
021ee9a6 | 568 | * @gtm: GTM data to use |
e1ddb4b6 | 569 | * |
021ee9a6 | 570 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 571 | */ |
021ee9a6 | 572 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 573 | { |
021ee9a6 TH |
574 | struct ata_device *dev; |
575 | ||
1eca4365 | 576 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
577 | unsigned long xfer_mask, udma_mask; |
578 | ||
021ee9a6 TH |
579 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
580 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
581 | ||
582 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
583 | return 1; | |
584 | } | |
585 | ||
e1ddb4b6 AC |
586 | return 0; |
587 | } | |
e1ddb4b6 AC |
588 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
589 | ||
3264a8d8 TH |
590 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
591 | const struct ata_acpi_gtf *gtf, | |
592 | struct ata_taskfile *tf) | |
593 | { | |
594 | ata_tf_init(dev, tf); | |
595 | ||
596 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
597 | tf->protocol = ATA_PROT_NODATA; | |
598 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
599 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
600 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
601 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
602 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
603 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
604 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
605 | } | |
606 | ||
110f66d2 TH |
607 | static int ata_acpi_filter_tf(struct ata_device *dev, |
608 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
609 | const struct ata_taskfile *ptf) |
610 | { | |
110f66d2 | 611 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
612 | /* libata doesn't use ACPI to configure transfer mode. |
613 | * It will only confuse device configuration. Skip. | |
614 | */ | |
615 | if (tf->command == ATA_CMD_SET_FEATURES && | |
616 | tf->feature == SETFEATURES_XFER) | |
617 | return 1; | |
618 | } | |
619 | ||
110f66d2 | 620 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
621 | /* BIOS writers, sorry but we don't wanna lock |
622 | * features unless the user explicitly said so. | |
623 | */ | |
624 | ||
625 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
626 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
627 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
628 | return 1; | |
629 | ||
630 | /* SECURITY FREEZE LOCK */ | |
631 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
632 | return 1; | |
633 | ||
634 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
635 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
636 | tf->command == ATA_CMD_SET_MAX && | |
637 | (tf->feature == ATA_SET_MAX_LOCK || | |
638 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
639 | return 1; | |
640 | } | |
641 | ||
fa5b561c TH |
642 | if (tf->command == ATA_CMD_SET_FEATURES && |
643 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 644 | /* inhibit enabling DIPM */ |
110f66d2 | 645 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
646 | tf->nsect == SATA_DIPM) |
647 | return 1; | |
fa5b561c TH |
648 | |
649 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 650 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
651 | (tf->nsect == SATA_FPDMA_OFFSET || |
652 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
653 | return 1; | |
654 | ||
655 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 656 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
657 | tf->nsect == SATA_FPDMA_AA) |
658 | return 1; | |
b344991a TH |
659 | } |
660 | ||
3264a8d8 TH |
661 | return 0; |
662 | } | |
663 | ||
11ef697b | 664 | /** |
0e8634bf | 665 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 666 | * @dev: target ATA device |
11ef697b KCA |
667 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
668 | * | |
669 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
670 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
671 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
672 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
673 | * hob_lbal, hob_lbam, and hob_lbah. | |
674 | * | |
675 | * This function waits for idle (!BUSY and !DRQ) after writing | |
676 | * registers. If the control register has a new value, this | |
677 | * function also waits for idle after writing control and before | |
678 | * writing the remaining registers. | |
679 | * | |
4700c4bc TH |
680 | * LOCKING: |
681 | * EH context. | |
682 | * | |
683 | * RETURNS: | |
3264a8d8 TH |
684 | * 1 if command is executed successfully. 0 if ignored, rejected or |
685 | * filtered out, -errno on other errors. | |
11ef697b | 686 | */ |
0e8634bf | 687 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
688 | const struct ata_acpi_gtf *gtf, |
689 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 690 | { |
3264a8d8 TH |
691 | struct ata_taskfile *pptf = NULL; |
692 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 693 | unsigned int err_mask; |
0e8634bf | 694 | const char *level; |
6521148c | 695 | const char *descr; |
0e8634bf TH |
696 | char msg[60]; |
697 | int rc; | |
fc16c25f | 698 | |
4700c4bc TH |
699 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
700 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
701 | && (gtf->tf[6] == 0)) | |
702 | return 0; | |
11ef697b | 703 | |
3264a8d8 TH |
704 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
705 | if (prev_gtf) { | |
706 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
707 | pptf = &ptf; | |
708 | } | |
709 | ||
110f66d2 | 710 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
711 | rtf = tf; |
712 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
713 | DMA_NONE, NULL, 0, 0); | |
714 | ||
715 | switch (err_mask) { | |
716 | case 0: | |
717 | level = KERN_DEBUG; | |
718 | snprintf(msg, sizeof(msg), "succeeded"); | |
719 | rc = 1; | |
720 | break; | |
721 | ||
722 | case AC_ERR_DEV: | |
723 | level = KERN_INFO; | |
724 | snprintf(msg, sizeof(msg), | |
725 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
726 | rtf.command, rtf.feature); | |
727 | rc = 0; | |
728 | break; | |
729 | ||
730 | default: | |
731 | level = KERN_ERR; | |
732 | snprintf(msg, sizeof(msg), | |
733 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
734 | err_mask, rtf.command, rtf.feature); | |
735 | rc = -EIO; | |
736 | break; | |
737 | } | |
738 | } else { | |
0e8634bf | 739 | level = KERN_INFO; |
3264a8d8 | 740 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 741 | rc = 0; |
4700c4bc | 742 | } |
6521148c | 743 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 744 | |
0e8634bf | 745 | ata_dev_printk(dev, level, |
6521148c | 746 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 747 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
748 | tf.lbam, tf.lbah, tf.device, |
749 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
750 | |
751 | return rc; | |
11ef697b KCA |
752 | } |
753 | ||
11ef697b KCA |
754 | /** |
755 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 756 | * @dev: target ATA device |
98a1708d | 757 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 758 | * |
98a1708d | 759 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
760 | * |
761 | * LOCKING: | |
762 | * EH context. | |
763 | * | |
764 | * RETURNS: | |
66fa7f21 TH |
765 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
766 | * -errno on other errors. | |
11ef697b | 767 | */ |
66fa7f21 | 768 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 769 | { |
3264a8d8 | 770 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
771 | int gtf_count, i, rc; |
772 | ||
773 | /* get taskfiles */ | |
66fa7f21 TH |
774 | rc = ata_dev_get_GTF(dev, >f); |
775 | if (rc < 0) | |
776 | return rc; | |
777 | gtf_count = rc; | |
6746544c TH |
778 | |
779 | /* execute them */ | |
3264a8d8 TH |
780 | for (i = 0; i < gtf_count; i++, gtf++) { |
781 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
782 | if (rc < 0) |
783 | break; | |
3264a8d8 | 784 | if (rc) { |
0e8634bf | 785 | (*nr_executed)++; |
3264a8d8 TH |
786 | pgtf = gtf; |
787 | } | |
11ef697b KCA |
788 | } |
789 | ||
398e0782 | 790 | ata_acpi_clear_gtf(dev); |
6746544c | 791 | |
0e8634bf TH |
792 | if (rc < 0) |
793 | return rc; | |
794 | return 0; | |
11ef697b KCA |
795 | } |
796 | ||
7ea1fbc2 KCA |
797 | /** |
798 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 799 | * @dev: target ATA device |
7ea1fbc2 KCA |
800 | * |
801 | * _SDD ACPI object: for SATA mode only | |
802 | * Must be after Identify (Packet) Device -- uses its data | |
803 | * ATM this function never returns a failure. It is an optional | |
804 | * method and if it fails for whatever reason, we should still | |
805 | * just keep going. | |
69b16a5f TH |
806 | * |
807 | * LOCKING: | |
808 | * EH context. | |
809 | * | |
810 | * RETURNS: | |
f2406770 | 811 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 812 | */ |
6746544c | 813 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 814 | { |
9af5c9c9 | 815 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
816 | acpi_status status; |
817 | struct acpi_object_list input; | |
818 | union acpi_object in_params[1]; | |
7ea1fbc2 | 819 | |
7ea1fbc2 | 820 | if (ata_msg_probe(ap)) |
3a32a8e9 | 821 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 822 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 823 | |
7ea1fbc2 KCA |
824 | /* Give the drive Identify data to the drive via the _SDD method */ |
825 | /* _SDD: set up input parameters */ | |
826 | input.count = 1; | |
827 | input.pointer = in_params; | |
828 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
829 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
830 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
831 | /* Output buffer: _SDD has no output */ |
832 | ||
833 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 834 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 835 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 836 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 837 | |
f2406770 TH |
838 | if (status == AE_NOT_FOUND) |
839 | return -ENOENT; | |
840 | ||
841 | if (ACPI_FAILURE(status)) { | |
69b16a5f TH |
842 | ata_dev_printk(dev, KERN_WARNING, |
843 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
f2406770 TH |
844 | return -EIO; |
845 | } | |
7ea1fbc2 | 846 | |
f2406770 | 847 | return 0; |
6746544c TH |
848 | } |
849 | ||
64578a3d TH |
850 | /** |
851 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
852 | * @ap: target ATA port | |
853 | * | |
854 | * This function is called when @ap is about to be suspended. All | |
855 | * devices are already put to sleep but the port_suspend() callback | |
856 | * hasn't been executed yet. Error return from this function aborts | |
857 | * suspend. | |
858 | * | |
859 | * LOCKING: | |
860 | * EH context. | |
861 | * | |
862 | * RETURNS: | |
863 | * 0 on success, -errno on failure. | |
864 | */ | |
865 | int ata_acpi_on_suspend(struct ata_port *ap) | |
866 | { | |
c05e6ff0 TH |
867 | /* nada */ |
868 | return 0; | |
64578a3d TH |
869 | } |
870 | ||
6746544c TH |
871 | /** |
872 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
873 | * @ap: target ATA port | |
874 | * | |
875 | * This function is called when @ap is resumed - right after port | |
876 | * itself is resumed but before any EH action is taken. | |
877 | * | |
878 | * LOCKING: | |
879 | * EH context. | |
880 | */ | |
881 | void ata_acpi_on_resume(struct ata_port *ap) | |
882 | { | |
c05e6ff0 | 883 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 884 | struct ata_device *dev; |
6746544c | 885 | |
398e0782 TH |
886 | if (ap->acpi_handle && gtm) { |
887 | /* _GTM valid */ | |
888 | ||
889 | /* restore timing parameters */ | |
c05e6ff0 | 890 | ata_acpi_stm(ap, gtm); |
64578a3d | 891 | |
398e0782 TH |
892 | /* _GTF should immediately follow _STM so that it can |
893 | * use values set by _STM. Cache _GTF result and | |
894 | * schedule _GTF. | |
895 | */ | |
1eca4365 | 896 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 897 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
898 | if (ata_dev_enabled(dev) && |
899 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
900 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
901 | } | |
902 | } else { | |
903 | /* SATA _GTF needs to be evaulated after _SDD and | |
904 | * there's no reason to evaluate IDE _GTF early | |
905 | * without _STM. Clear cache and schedule _GTF. | |
906 | */ | |
1eca4365 | 907 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 908 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
909 | if (ata_dev_enabled(dev)) |
910 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
911 | } |
912 | } | |
7ea1fbc2 KCA |
913 | } |
914 | ||
bd3adca5 SL |
915 | /** |
916 | * ata_acpi_set_state - set the port power state | |
917 | * @ap: target ATA port | |
918 | * @state: state, on/off | |
919 | * | |
920 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
921 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
922 | */ | |
923 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
924 | { | |
925 | struct ata_device *dev; | |
926 | ||
927 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
928 | return; | |
929 | ||
930 | /* channel first and then drives for power on and vica versa | |
931 | for power off */ | |
932 | if (state.event == PM_EVENT_ON) | |
933 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
934 | ||
1eca4365 TH |
935 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
936 | if (dev->acpi_handle) | |
bd3adca5 SL |
937 | acpi_bus_set_power(dev->acpi_handle, |
938 | state.event == PM_EVENT_ON ? | |
939 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
940 | } | |
941 | if (state.event != PM_EVENT_ON) | |
942 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
943 | } | |
944 | ||
6746544c TH |
945 | /** |
946 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
947 | * @dev: target ATA device | |
948 | * | |
949 | * This function is called when @dev is about to be configured. | |
950 | * IDENTIFY data might have been modified after this hook is run. | |
951 | * | |
952 | * LOCKING: | |
953 | * EH context. | |
954 | * | |
955 | * RETURNS: | |
956 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
957 | * -errno on failure. | |
958 | */ | |
959 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
960 | { | |
9af5c9c9 TH |
961 | struct ata_port *ap = dev->link->ap; |
962 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 963 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 964 | int nr_executed = 0; |
6746544c TH |
965 | int rc; |
966 | ||
6746544c TH |
967 | if (!dev->acpi_handle) |
968 | return 0; | |
969 | ||
970 | /* do we need to do _GTF? */ | |
971 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
972 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
973 | return 0; | |
974 | ||
975 | /* do _SDD if SATA */ | |
976 | if (acpi_sata) { | |
977 | rc = ata_acpi_push_id(dev); | |
f2406770 | 978 | if (rc && rc != -ENOENT) |
6746544c TH |
979 | goto acpi_err; |
980 | } | |
981 | ||
982 | /* do _GTF */ | |
66fa7f21 TH |
983 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
984 | if (rc) | |
6746544c TH |
985 | goto acpi_err; |
986 | ||
987 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
988 | ||
989 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 990 | if (nr_executed) { |
6746544c TH |
991 | rc = ata_dev_reread_id(dev, 0); |
992 | if (rc < 0) { | |
993 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
994 | "after ACPI commands\n"); | |
995 | return rc; | |
996 | } | |
997 | } | |
998 | ||
999 | return 0; | |
1000 | ||
1001 | acpi_err: | |
66fa7f21 TH |
1002 | /* ignore evaluation failure if we can continue safely */ |
1003 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1004 | return 0; | |
6746544c | 1005 | |
66fa7f21 TH |
1006 | /* fail and let EH retry once more for unknown IO errors */ |
1007 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1008 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1009 | return rc; | |
6746544c | 1010 | } |
66fa7f21 TH |
1011 | |
1012 | ata_dev_printk(dev, KERN_WARNING, | |
1013 | "ACPI: failed the second time, disabled\n"); | |
1014 | dev->acpi_handle = NULL; | |
1015 | ||
1016 | /* We can safely continue if no _GTF command has been executed | |
1017 | * and port is not frozen. | |
1018 | */ | |
1019 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1020 | return 0; | |
1021 | ||
6746544c TH |
1022 | return rc; |
1023 | } | |
562f0c2d TH |
1024 | |
1025 | /** | |
1026 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1027 | * @dev: target ATA device | |
1028 | * | |
1029 | * This function is called when @dev is about to be disabled. | |
1030 | * | |
1031 | * LOCKING: | |
1032 | * EH context. | |
1033 | */ | |
1034 | void ata_acpi_on_disable(struct ata_device *dev) | |
1035 | { | |
398e0782 | 1036 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1037 | } |