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Commit | Line | Data |
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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 | ||
6b66d958 MG |
50 | static acpi_handle ap_acpi_handle(struct ata_port *ap) |
51 | { | |
52 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
53 | return NULL; | |
54 | ||
55 | /* | |
56 | * If acpi bind operation has already happened, we can get the handle | |
57 | * for the port by checking the corresponding scsi_host device's | |
58 | * firmware node, otherwise we will need to find out the handle from | |
59 | * its parent's acpi node. | |
60 | */ | |
61 | if (ap->scsi_host) | |
62 | return DEVICE_ACPI_HANDLE(&ap->scsi_host->shost_gendev); | |
63 | else | |
64 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), | |
65 | ap->port_no); | |
66 | } | |
67 | ||
68 | static acpi_handle dev_acpi_handle(struct ata_device *dev) | |
69 | { | |
70 | acpi_integer adr; | |
71 | struct ata_port *ap = dev->link->ap; | |
72 | ||
73 | if (ap->flags & ATA_FLAG_ACPI_SATA) { | |
74 | if (!sata_pmp_attached(ap)) | |
75 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
76 | else | |
77 | adr = SATA_ADR(ap->port_no, dev->link->pmp); | |
78 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), adr); | |
79 | } else | |
80 | return acpi_get_child(ap_acpi_handle(ap), dev->devno); | |
81 | } | |
82 | ||
d0df8b5d TH |
83 | /** |
84 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
85 | * @ap: target SATA port | |
86 | * | |
87 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
88 | * fields of @ap, the port and devices accordingly. | |
89 | * | |
90 | * LOCKING: | |
91 | * EH context. | |
92 | * | |
93 | * RETURNS: | |
94 | * 0 on success, -errno on failure. | |
95 | */ | |
96 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 97 | { |
d0df8b5d TH |
98 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
99 | ||
071f44b1 | 100 | if (!sata_pmp_attached(ap)) { |
439913ff | 101 | u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
d0df8b5d TH |
102 | |
103 | ap->link.device->acpi_handle = | |
104 | acpi_get_child(ap->host->acpi_handle, adr); | |
105 | } else { | |
106 | struct ata_link *link; | |
107 | ||
108 | ap->link.device->acpi_handle = NULL; | |
109 | ||
1eca4365 | 110 | ata_for_each_link(link, ap, EDGE) { |
439913ff | 111 | u64 adr = SATA_ADR(ap->port_no, link->pmp); |
fafbae87 | 112 | |
d0df8b5d TH |
113 | link->device->acpi_handle = |
114 | acpi_get_child(ap->host->acpi_handle, adr); | |
115 | } | |
116 | } | |
11ef697b KCA |
117 | } |
118 | ||
fafbae87 | 119 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 120 | { |
fafbae87 | 121 | int max_devices, i; |
11ef697b | 122 | |
fafbae87 TH |
123 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
124 | if (!ap->acpi_handle) | |
125 | return; | |
11ef697b | 126 | |
fafbae87 TH |
127 | max_devices = 1; |
128 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
129 | max_devices++; | |
11ef697b | 130 | |
fafbae87 | 131 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 132 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 133 | |
fafbae87 | 134 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 135 | } |
c05e6ff0 TH |
136 | |
137 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
138 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
139 | } |
140 | ||
664d080c HM |
141 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
142 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
143 | { | |
144 | if (dev) | |
145 | dev->flags |= ATA_DFLAG_DETACH; | |
146 | else { | |
147 | struct ata_link *tlink; | |
148 | struct ata_device *tdev; | |
149 | ||
1eca4365 TH |
150 | ata_for_each_link(tlink, ap, EDGE) |
151 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
152 | tdev->flags |= ATA_DFLAG_DETACH; |
153 | } | |
154 | ||
155 | ata_port_schedule_eh(ap); | |
156 | } | |
157 | ||
158 | /** | |
159 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
160 | * @ap: ATA port ACPI event occurred | |
161 | * @dev: ATA device ACPI event occurred (can be NULL) | |
162 | * @event: ACPI event which occurred | |
664d080c HM |
163 | * |
164 | * All ACPI bay / device realted events end up in this function. If | |
165 | * the event is port-wide @dev is NULL. If the event is specific to a | |
166 | * device, @dev points to it. | |
167 | * | |
168 | * Hotplug (as opposed to unplug) notification is always handled as | |
169 | * port-wide while unplug only kills the target device on device-wide | |
170 | * event. | |
171 | * | |
172 | * LOCKING: | |
173 | * ACPI notify handler context. May sleep. | |
174 | */ | |
175 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 176 | u32 event) |
237d8440 | 177 | { |
664d080c | 178 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
179 | int wait = 0; |
180 | unsigned long flags; | |
3c1e3896 | 181 | |
664d080c | 182 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
183 | /* |
184 | * When dock driver calls into the routine, it will always use | |
185 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
186 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
187 | */ | |
233f1120 TH |
188 | switch (event) { |
189 | case ACPI_NOTIFY_BUS_CHECK: | |
190 | case ACPI_NOTIFY_DEVICE_CHECK: | |
191 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 192 | |
f730ae18 SL |
193 | ata_ehi_hotplugged(ehi); |
194 | ata_port_freeze(ap); | |
664d080c HM |
195 | break; |
196 | case ACPI_NOTIFY_EJECT_REQUEST: | |
197 | ata_ehi_push_desc(ehi, "ACPI event"); | |
198 | ||
664d080c HM |
199 | ata_acpi_detach_device(ap, dev); |
200 | wait = 1; | |
201 | break; | |
237d8440 MG |
202 | } |
203 | ||
ae6c23c4 MG |
204 | spin_unlock_irqrestore(ap->lock, flags); |
205 | ||
f730ae18 | 206 | if (wait) |
ae6c23c4 | 207 | ata_port_wait_eh(ap); |
664d080c HM |
208 | } |
209 | ||
210 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
211 | { | |
212 | struct ata_device *dev = data; | |
213 | ||
f730ae18 | 214 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
215 | } |
216 | ||
217 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
218 | { | |
219 | struct ata_port *ap = data; | |
220 | ||
f730ae18 | 221 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
222 | } |
223 | ||
1253f7aa SL |
224 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
225 | u32 event) | |
226 | { | |
227 | struct kobject *kobj = NULL; | |
228 | char event_string[20]; | |
229 | char *envp[] = { event_string, NULL }; | |
230 | ||
231 | if (dev) { | |
232 | if (dev->sdev) | |
233 | kobj = &dev->sdev->sdev_gendev.kobj; | |
234 | } else | |
235 | kobj = &ap->dev->kobj; | |
236 | ||
237 | if (kobj) { | |
238 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
239 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
240 | } | |
241 | } | |
242 | ||
243 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
244 | { | |
245 | ata_acpi_uevent(data, NULL, event); | |
246 | } | |
247 | ||
248 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
249 | { | |
250 | struct ata_device *dev = data; | |
251 | ata_acpi_uevent(dev->link->ap, dev, event); | |
252 | } | |
253 | ||
9c8b04be | 254 | static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
1253f7aa SL |
255 | .handler = ata_acpi_dev_notify_dock, |
256 | .uevent = ata_acpi_dev_uevent, | |
257 | }; | |
258 | ||
9c8b04be | 259 | static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
1253f7aa SL |
260 | .handler = ata_acpi_ap_notify_dock, |
261 | .uevent = ata_acpi_ap_uevent, | |
262 | }; | |
263 | ||
fafbae87 TH |
264 | /** |
265 | * ata_acpi_associate - associate ATA host with ACPI objects | |
266 | * @host: target ATA host | |
267 | * | |
268 | * Look up ACPI objects associated with @host and initialize | |
269 | * acpi_handle fields of @host, its ports and devices accordingly. | |
270 | * | |
271 | * LOCKING: | |
272 | * EH context. | |
273 | * | |
274 | * RETURNS: | |
275 | * 0 on success, -errno on failure. | |
276 | */ | |
277 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 278 | { |
237d8440 | 279 | int i, j; |
11ef697b | 280 | |
fafbae87 TH |
281 | if (!is_pci_dev(host->dev) || libata_noacpi) |
282 | return; | |
11ef697b | 283 | |
fafbae87 TH |
284 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
285 | if (!host->acpi_handle) | |
286 | return; | |
11ef697b | 287 | |
fafbae87 TH |
288 | for (i = 0; i < host->n_ports; i++) { |
289 | struct ata_port *ap = host->ports[i]; | |
290 | ||
291 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
292 | ata_acpi_associate_sata_port(ap); | |
293 | else | |
294 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 295 | |
233f1120 | 296 | if (ap->acpi_handle) { |
233f1120 TH |
297 | /* we might be on a docking station */ |
298 | register_hotplug_dock_device(ap->acpi_handle, | |
1253f7aa | 299 | &ata_acpi_ap_dock_ops, ap); |
233f1120 | 300 | } |
237d8440 MG |
301 | |
302 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
303 | struct ata_device *dev = &ap->link.device[j]; | |
304 | ||
233f1120 | 305 | if (dev->acpi_handle) { |
233f1120 TH |
306 | /* we might be on a docking station */ |
307 | register_hotplug_dock_device(dev->acpi_handle, | |
1253f7aa | 308 | &ata_acpi_dev_dock_ops, dev); |
233f1120 | 309 | } |
237d8440 | 310 | } |
11ef697b | 311 | } |
11ef697b KCA |
312 | } |
313 | ||
562f0c2d TH |
314 | /** |
315 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
316 | * @host: target ATA host | |
317 | * | |
318 | * This function is called during driver detach after the whole host | |
319 | * is shut down. | |
320 | * | |
321 | * LOCKING: | |
322 | * EH context. | |
323 | */ | |
324 | void ata_acpi_dissociate(struct ata_host *host) | |
325 | { | |
c05e6ff0 TH |
326 | int i; |
327 | ||
328 | /* Restore initial _GTM values so that driver which attaches | |
329 | * afterward can use them too. | |
330 | */ | |
331 | for (i = 0; i < host->n_ports; i++) { | |
332 | struct ata_port *ap = host->ports[i]; | |
333 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
334 | ||
335 | if (ap->acpi_handle && gtm) | |
336 | ata_acpi_stm(ap, gtm); | |
337 | } | |
562f0c2d TH |
338 | } |
339 | ||
64578a3d TH |
340 | /** |
341 | * ata_acpi_gtm - execute _GTM | |
342 | * @ap: target ATA port | |
343 | * @gtm: out parameter for _GTM result | |
344 | * | |
345 | * Evaluate _GTM and store the result in @gtm. | |
346 | * | |
347 | * LOCKING: | |
348 | * EH context. | |
349 | * | |
350 | * RETURNS: | |
351 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
352 | */ | |
0d02f0b2 | 353 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
354 | { |
355 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
356 | union acpi_object *out_obj; | |
357 | acpi_status status; | |
358 | int rc = 0; | |
359 | ||
360 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
361 | ||
362 | rc = -ENOENT; | |
363 | if (status == AE_NOT_FOUND) | |
364 | goto out_free; | |
365 | ||
366 | rc = -EINVAL; | |
367 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
368 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
369 | status); | |
64578a3d TH |
370 | goto out_free; |
371 | } | |
372 | ||
373 | out_obj = output.pointer; | |
374 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
a9a79dfe JP |
375 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
376 | out_obj->type); | |
64578a3d TH |
377 | |
378 | goto out_free; | |
379 | } | |
380 | ||
381 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
a9a79dfe JP |
382 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
383 | out_obj->buffer.length); | |
64578a3d TH |
384 | goto out_free; |
385 | } | |
386 | ||
387 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
388 | rc = 0; | |
389 | out_free: | |
390 | kfree(output.pointer); | |
391 | return rc; | |
392 | } | |
393 | ||
badff03d AC |
394 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
395 | ||
64578a3d TH |
396 | /** |
397 | * ata_acpi_stm - execute _STM | |
398 | * @ap: target ATA port | |
399 | * @stm: timing parameter to _STM | |
400 | * | |
401 | * Evaluate _STM with timing parameter @stm. | |
402 | * | |
403 | * LOCKING: | |
404 | * EH context. | |
405 | * | |
406 | * RETURNS: | |
407 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
408 | */ | |
0d02f0b2 | 409 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
410 | { |
411 | acpi_status status; | |
0d02f0b2 | 412 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
413 | struct acpi_object_list input; |
414 | union acpi_object in_params[3]; | |
415 | ||
416 | in_params[0].type = ACPI_TYPE_BUFFER; | |
417 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 418 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
419 | /* Buffers for id may need byteswapping ? */ |
420 | in_params[1].type = ACPI_TYPE_BUFFER; | |
421 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 422 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
423 | in_params[2].type = ACPI_TYPE_BUFFER; |
424 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 425 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
426 | |
427 | input.count = 3; | |
428 | input.pointer = in_params; | |
429 | ||
430 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
431 | ||
432 | if (status == AE_NOT_FOUND) | |
433 | return -ENOENT; | |
434 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
435 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
436 | status); | |
64578a3d TH |
437 | return -EINVAL; |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
badff03d AC |
442 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
443 | ||
11ef697b | 444 | /** |
4700c4bc | 445 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 446 | * @dev: target ATA device |
4700c4bc | 447 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
448 | * |
449 | * This applies to both PATA and SATA drives. | |
450 | * | |
451 | * The _GTF method has no input parameters. | |
452 | * It returns a variable number of register set values (registers | |
453 | * hex 1F1..1F7, taskfiles). | |
454 | * The <variable number> is not known in advance, so have ACPI-CA | |
455 | * allocate the buffer as needed and return it, then free it later. | |
456 | * | |
4700c4bc TH |
457 | * LOCKING: |
458 | * EH context. | |
459 | * | |
460 | * RETURNS: | |
66fa7f21 TH |
461 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
462 | * if _GTF is invalid. | |
11ef697b | 463 | */ |
398e0782 | 464 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 465 | { |
9af5c9c9 | 466 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 467 | acpi_status status; |
3a32a8e9 TH |
468 | struct acpi_buffer output; |
469 | union acpi_object *out_obj; | |
4700c4bc | 470 | int rc = 0; |
11ef697b | 471 | |
398e0782 TH |
472 | /* if _GTF is cached, use the cached value */ |
473 | if (dev->gtf_cache) { | |
474 | out_obj = dev->gtf_cache; | |
475 | goto done; | |
476 | } | |
477 | ||
4700c4bc TH |
478 | /* set up output buffer */ |
479 | output.length = ACPI_ALLOCATE_BUFFER; | |
480 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 481 | |
11ef697b | 482 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
483 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
484 | __func__, ap->port_no); | |
11ef697b | 485 | |
11ef697b | 486 | /* _GTF has no input parameters */ |
4700c4bc | 487 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 488 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 489 | |
11ef697b | 490 | if (ACPI_FAILURE(status)) { |
4700c4bc | 491 | if (status != AE_NOT_FOUND) { |
a9a79dfe JP |
492 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
493 | status); | |
66fa7f21 | 494 | rc = -EINVAL; |
4700c4bc TH |
495 | } |
496 | goto out_free; | |
11ef697b KCA |
497 | } |
498 | ||
499 | if (!output.length || !output.pointer) { | |
500 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
501 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
502 | __func__, | |
503 | (unsigned long long)output.length, | |
504 | output.pointer); | |
66fa7f21 | 505 | rc = -EINVAL; |
4700c4bc | 506 | goto out_free; |
11ef697b KCA |
507 | } |
508 | ||
11ef697b | 509 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
a9a79dfe JP |
510 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
511 | out_obj->type); | |
66fa7f21 | 512 | rc = -EINVAL; |
4700c4bc | 513 | goto out_free; |
11ef697b KCA |
514 | } |
515 | ||
4700c4bc | 516 | if (out_obj->buffer.length % REGS_PER_GTF) { |
a9a79dfe JP |
517 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
518 | out_obj->buffer.length); | |
66fa7f21 | 519 | rc = -EINVAL; |
4700c4bc | 520 | goto out_free; |
11ef697b KCA |
521 | } |
522 | ||
398e0782 | 523 | done: |
4700c4bc | 524 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
525 | if (gtf) { |
526 | *gtf = (void *)out_obj->buffer.pointer; | |
527 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
528 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
529 | __func__, *gtf, rc); | |
398e0782 | 530 | } |
4700c4bc TH |
531 | return rc; |
532 | ||
533 | out_free: | |
398e0782 | 534 | ata_acpi_clear_gtf(dev); |
4700c4bc | 535 | return rc; |
11ef697b KCA |
536 | } |
537 | ||
7c77fa4d TH |
538 | /** |
539 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
540 | * @dev: target device | |
541 | * @gtm: GTM parameter to use | |
542 | * | |
543 | * Determine xfermask for @dev from @gtm. | |
544 | * | |
545 | * LOCKING: | |
546 | * None. | |
547 | * | |
548 | * RETURNS: | |
549 | * Determined xfermask. | |
550 | */ | |
551 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
552 | const struct ata_acpi_gtm *gtm) | |
553 | { | |
a0f79b92 TH |
554 | unsigned long xfer_mask = 0; |
555 | unsigned int type; | |
556 | int unit; | |
557 | u8 mode; | |
7c77fa4d TH |
558 | |
559 | /* we always use the 0 slot for crap hardware */ | |
560 | unit = dev->devno; | |
561 | if (!(gtm->flags & 0x10)) | |
562 | unit = 0; | |
563 | ||
a0f79b92 TH |
564 | /* PIO */ |
565 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
566 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
567 | |
568 | /* See if we have MWDMA or UDMA data. We don't bother with | |
569 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
570 | * and our error changedown if it works is UDMA to PIO anyway. | |
571 | */ | |
a0f79b92 TH |
572 | if (!(gtm->flags & (1 << (2 * unit)))) |
573 | type = ATA_SHIFT_MWDMA; | |
574 | else | |
575 | type = ATA_SHIFT_UDMA; | |
576 | ||
577 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
578 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 579 | |
a0f79b92 | 580 | return xfer_mask; |
7c77fa4d TH |
581 | } |
582 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
583 | ||
e1ddb4b6 AC |
584 | /** |
585 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
586 | * @ap: Port to check | |
021ee9a6 | 587 | * @gtm: GTM data to use |
e1ddb4b6 | 588 | * |
021ee9a6 | 589 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 590 | */ |
021ee9a6 | 591 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 592 | { |
021ee9a6 TH |
593 | struct ata_device *dev; |
594 | ||
1eca4365 | 595 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
596 | unsigned long xfer_mask, udma_mask; |
597 | ||
021ee9a6 TH |
598 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
599 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
600 | ||
601 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
602 | return 1; | |
603 | } | |
604 | ||
e1ddb4b6 AC |
605 | return 0; |
606 | } | |
e1ddb4b6 AC |
607 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
608 | ||
3264a8d8 TH |
609 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
610 | const struct ata_acpi_gtf *gtf, | |
611 | struct ata_taskfile *tf) | |
612 | { | |
613 | ata_tf_init(dev, tf); | |
614 | ||
615 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
616 | tf->protocol = ATA_PROT_NODATA; | |
617 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
618 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
619 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
620 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
621 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
622 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
623 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
624 | } | |
625 | ||
110f66d2 TH |
626 | static int ata_acpi_filter_tf(struct ata_device *dev, |
627 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
628 | const struct ata_taskfile *ptf) |
629 | { | |
110f66d2 | 630 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
631 | /* libata doesn't use ACPI to configure transfer mode. |
632 | * It will only confuse device configuration. Skip. | |
633 | */ | |
634 | if (tf->command == ATA_CMD_SET_FEATURES && | |
635 | tf->feature == SETFEATURES_XFER) | |
636 | return 1; | |
637 | } | |
638 | ||
110f66d2 | 639 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
640 | /* BIOS writers, sorry but we don't wanna lock |
641 | * features unless the user explicitly said so. | |
642 | */ | |
643 | ||
644 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
645 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
646 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
647 | return 1; | |
648 | ||
649 | /* SECURITY FREEZE LOCK */ | |
650 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
651 | return 1; | |
652 | ||
653 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
654 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
655 | tf->command == ATA_CMD_SET_MAX && | |
656 | (tf->feature == ATA_SET_MAX_LOCK || | |
657 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
658 | return 1; | |
659 | } | |
660 | ||
fa5b561c TH |
661 | if (tf->command == ATA_CMD_SET_FEATURES && |
662 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 663 | /* inhibit enabling DIPM */ |
110f66d2 | 664 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
665 | tf->nsect == SATA_DIPM) |
666 | return 1; | |
fa5b561c TH |
667 | |
668 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 669 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
670 | (tf->nsect == SATA_FPDMA_OFFSET || |
671 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
672 | return 1; | |
673 | ||
674 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 675 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
676 | tf->nsect == SATA_FPDMA_AA) |
677 | return 1; | |
b344991a TH |
678 | } |
679 | ||
3264a8d8 TH |
680 | return 0; |
681 | } | |
682 | ||
11ef697b | 683 | /** |
0e8634bf | 684 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 685 | * @dev: target ATA device |
11ef697b KCA |
686 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
687 | * | |
3696df30 | 688 | * Outputs ATA taskfile to standard ATA host controller. |
11ef697b KCA |
689 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
690 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
691 | * hob_lbal, hob_lbam, and hob_lbah. | |
692 | * | |
693 | * This function waits for idle (!BUSY and !DRQ) after writing | |
694 | * registers. If the control register has a new value, this | |
695 | * function also waits for idle after writing control and before | |
696 | * writing the remaining registers. | |
697 | * | |
4700c4bc TH |
698 | * LOCKING: |
699 | * EH context. | |
700 | * | |
701 | * RETURNS: | |
3264a8d8 TH |
702 | * 1 if command is executed successfully. 0 if ignored, rejected or |
703 | * filtered out, -errno on other errors. | |
11ef697b | 704 | */ |
0e8634bf | 705 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
706 | const struct ata_acpi_gtf *gtf, |
707 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 708 | { |
3264a8d8 TH |
709 | struct ata_taskfile *pptf = NULL; |
710 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 711 | unsigned int err_mask; |
0e8634bf | 712 | const char *level; |
6521148c | 713 | const char *descr; |
0e8634bf TH |
714 | char msg[60]; |
715 | int rc; | |
fc16c25f | 716 | |
4700c4bc TH |
717 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
718 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
719 | && (gtf->tf[6] == 0)) | |
720 | return 0; | |
11ef697b | 721 | |
3264a8d8 TH |
722 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
723 | if (prev_gtf) { | |
724 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
725 | pptf = &ptf; | |
726 | } | |
727 | ||
110f66d2 | 728 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
729 | rtf = tf; |
730 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
731 | DMA_NONE, NULL, 0, 0); | |
732 | ||
733 | switch (err_mask) { | |
734 | case 0: | |
735 | level = KERN_DEBUG; | |
736 | snprintf(msg, sizeof(msg), "succeeded"); | |
737 | rc = 1; | |
738 | break; | |
739 | ||
740 | case AC_ERR_DEV: | |
741 | level = KERN_INFO; | |
742 | snprintf(msg, sizeof(msg), | |
743 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
744 | rtf.command, rtf.feature); | |
745 | rc = 0; | |
746 | break; | |
747 | ||
748 | default: | |
749 | level = KERN_ERR; | |
750 | snprintf(msg, sizeof(msg), | |
751 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
752 | err_mask, rtf.command, rtf.feature); | |
753 | rc = -EIO; | |
754 | break; | |
755 | } | |
756 | } else { | |
0e8634bf | 757 | level = KERN_INFO; |
3264a8d8 | 758 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 759 | rc = 0; |
4700c4bc | 760 | } |
6521148c | 761 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 762 | |
0e8634bf | 763 | ata_dev_printk(dev, level, |
6521148c | 764 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 765 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
766 | tf.lbam, tf.lbah, tf.device, |
767 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
768 | |
769 | return rc; | |
11ef697b KCA |
770 | } |
771 | ||
11ef697b KCA |
772 | /** |
773 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 774 | * @dev: target ATA device |
98a1708d | 775 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 776 | * |
98a1708d | 777 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
778 | * |
779 | * LOCKING: | |
780 | * EH context. | |
781 | * | |
782 | * RETURNS: | |
66fa7f21 TH |
783 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
784 | * -errno on other errors. | |
11ef697b | 785 | */ |
66fa7f21 | 786 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 787 | { |
3264a8d8 | 788 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
789 | int gtf_count, i, rc; |
790 | ||
791 | /* get taskfiles */ | |
66fa7f21 TH |
792 | rc = ata_dev_get_GTF(dev, >f); |
793 | if (rc < 0) | |
794 | return rc; | |
795 | gtf_count = rc; | |
6746544c TH |
796 | |
797 | /* execute them */ | |
3264a8d8 TH |
798 | for (i = 0; i < gtf_count; i++, gtf++) { |
799 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
800 | if (rc < 0) |
801 | break; | |
3264a8d8 | 802 | if (rc) { |
0e8634bf | 803 | (*nr_executed)++; |
3264a8d8 TH |
804 | pgtf = gtf; |
805 | } | |
11ef697b KCA |
806 | } |
807 | ||
398e0782 | 808 | ata_acpi_clear_gtf(dev); |
6746544c | 809 | |
0e8634bf TH |
810 | if (rc < 0) |
811 | return rc; | |
812 | return 0; | |
11ef697b KCA |
813 | } |
814 | ||
7ea1fbc2 KCA |
815 | /** |
816 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 817 | * @dev: target ATA device |
7ea1fbc2 KCA |
818 | * |
819 | * _SDD ACPI object: for SATA mode only | |
820 | * Must be after Identify (Packet) Device -- uses its data | |
821 | * ATM this function never returns a failure. It is an optional | |
822 | * method and if it fails for whatever reason, we should still | |
823 | * just keep going. | |
69b16a5f TH |
824 | * |
825 | * LOCKING: | |
826 | * EH context. | |
827 | * | |
828 | * RETURNS: | |
f2406770 | 829 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 830 | */ |
6746544c | 831 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 832 | { |
9af5c9c9 | 833 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
834 | acpi_status status; |
835 | struct acpi_object_list input; | |
836 | union acpi_object in_params[1]; | |
7ea1fbc2 | 837 | |
7ea1fbc2 | 838 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
839 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
840 | __func__, dev->devno, ap->port_no); | |
7ea1fbc2 | 841 | |
7ea1fbc2 KCA |
842 | /* Give the drive Identify data to the drive via the _SDD method */ |
843 | /* _SDD: set up input parameters */ | |
844 | input.count = 1; | |
845 | input.pointer = in_params; | |
846 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
847 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
848 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
849 | /* Output buffer: _SDD has no output */ |
850 | ||
851 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 852 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 853 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 854 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 855 | |
f2406770 TH |
856 | if (status == AE_NOT_FOUND) |
857 | return -ENOENT; | |
858 | ||
859 | if (ACPI_FAILURE(status)) { | |
a9a79dfe | 860 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
f2406770 TH |
861 | return -EIO; |
862 | } | |
7ea1fbc2 | 863 | |
f2406770 | 864 | return 0; |
6746544c TH |
865 | } |
866 | ||
64578a3d TH |
867 | /** |
868 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
869 | * @ap: target ATA port | |
870 | * | |
871 | * This function is called when @ap is about to be suspended. All | |
872 | * devices are already put to sleep but the port_suspend() callback | |
873 | * hasn't been executed yet. Error return from this function aborts | |
874 | * suspend. | |
875 | * | |
876 | * LOCKING: | |
877 | * EH context. | |
878 | * | |
879 | * RETURNS: | |
880 | * 0 on success, -errno on failure. | |
881 | */ | |
882 | int ata_acpi_on_suspend(struct ata_port *ap) | |
883 | { | |
c05e6ff0 TH |
884 | /* nada */ |
885 | return 0; | |
64578a3d TH |
886 | } |
887 | ||
6746544c TH |
888 | /** |
889 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
890 | * @ap: target ATA port | |
891 | * | |
892 | * This function is called when @ap is resumed - right after port | |
893 | * itself is resumed but before any EH action is taken. | |
894 | * | |
895 | * LOCKING: | |
896 | * EH context. | |
897 | */ | |
898 | void ata_acpi_on_resume(struct ata_port *ap) | |
899 | { | |
c05e6ff0 | 900 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 901 | struct ata_device *dev; |
6746544c | 902 | |
398e0782 TH |
903 | if (ap->acpi_handle && gtm) { |
904 | /* _GTM valid */ | |
905 | ||
906 | /* restore timing parameters */ | |
c05e6ff0 | 907 | ata_acpi_stm(ap, gtm); |
64578a3d | 908 | |
398e0782 TH |
909 | /* _GTF should immediately follow _STM so that it can |
910 | * use values set by _STM. Cache _GTF result and | |
911 | * schedule _GTF. | |
912 | */ | |
1eca4365 | 913 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 914 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
915 | if (ata_dev_enabled(dev) && |
916 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
917 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
918 | } | |
919 | } else { | |
920 | /* SATA _GTF needs to be evaulated after _SDD and | |
921 | * there's no reason to evaluate IDE _GTF early | |
922 | * without _STM. Clear cache and schedule _GTF. | |
923 | */ | |
1eca4365 | 924 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 925 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
926 | if (ata_dev_enabled(dev)) |
927 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
928 | } |
929 | } | |
7ea1fbc2 KCA |
930 | } |
931 | ||
bd3adca5 SL |
932 | /** |
933 | * ata_acpi_set_state - set the port power state | |
934 | * @ap: target ATA port | |
935 | * @state: state, on/off | |
936 | * | |
937 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
938 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
939 | */ | |
940 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
941 | { | |
942 | struct ata_device *dev; | |
943 | ||
944 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
945 | return; | |
946 | ||
947 | /* channel first and then drives for power on and vica versa | |
948 | for power off */ | |
949 | if (state.event == PM_EVENT_ON) | |
950 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
951 | ||
1eca4365 TH |
952 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
953 | if (dev->acpi_handle) | |
bd3adca5 SL |
954 | acpi_bus_set_power(dev->acpi_handle, |
955 | state.event == PM_EVENT_ON ? | |
956 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
957 | } | |
958 | if (state.event != PM_EVENT_ON) | |
959 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
960 | } | |
961 | ||
6746544c TH |
962 | /** |
963 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
964 | * @dev: target ATA device | |
965 | * | |
966 | * This function is called when @dev is about to be configured. | |
967 | * IDENTIFY data might have been modified after this hook is run. | |
968 | * | |
969 | * LOCKING: | |
970 | * EH context. | |
971 | * | |
972 | * RETURNS: | |
973 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
974 | * -errno on failure. | |
975 | */ | |
976 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
977 | { | |
9af5c9c9 TH |
978 | struct ata_port *ap = dev->link->ap; |
979 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 980 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 981 | int nr_executed = 0; |
6746544c TH |
982 | int rc; |
983 | ||
6746544c TH |
984 | if (!dev->acpi_handle) |
985 | return 0; | |
986 | ||
987 | /* do we need to do _GTF? */ | |
988 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
989 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
990 | return 0; | |
991 | ||
992 | /* do _SDD if SATA */ | |
993 | if (acpi_sata) { | |
994 | rc = ata_acpi_push_id(dev); | |
f2406770 | 995 | if (rc && rc != -ENOENT) |
6746544c TH |
996 | goto acpi_err; |
997 | } | |
998 | ||
999 | /* do _GTF */ | |
66fa7f21 TH |
1000 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
1001 | if (rc) | |
6746544c TH |
1002 | goto acpi_err; |
1003 | ||
1004 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
1005 | ||
1006 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 1007 | if (nr_executed) { |
6746544c TH |
1008 | rc = ata_dev_reread_id(dev, 0); |
1009 | if (rc < 0) { | |
a9a79dfe JP |
1010 | ata_dev_err(dev, |
1011 | "failed to IDENTIFY after ACPI commands\n"); | |
6746544c TH |
1012 | return rc; |
1013 | } | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | ||
1018 | acpi_err: | |
66fa7f21 TH |
1019 | /* ignore evaluation failure if we can continue safely */ |
1020 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1021 | return 0; | |
6746544c | 1022 | |
66fa7f21 TH |
1023 | /* fail and let EH retry once more for unknown IO errors */ |
1024 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1025 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1026 | return rc; | |
6746544c | 1027 | } |
66fa7f21 | 1028 | |
a9a79dfe | 1029 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
66fa7f21 TH |
1030 | dev->acpi_handle = NULL; |
1031 | ||
1032 | /* We can safely continue if no _GTF command has been executed | |
1033 | * and port is not frozen. | |
1034 | */ | |
1035 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1036 | return 0; | |
1037 | ||
6746544c TH |
1038 | return rc; |
1039 | } | |
562f0c2d TH |
1040 | |
1041 | /** | |
1042 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1043 | * @dev: target ATA device | |
1044 | * | |
1045 | * This function is called when @dev is about to be disabled. | |
1046 | * | |
1047 | * LOCKING: | |
1048 | * EH context. | |
1049 | */ | |
1050 | void ata_acpi_on_disable(struct ata_device *dev) | |
1051 | { | |
398e0782 | 1052 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1053 | } |
6b66d958 MG |
1054 | |
1055 | static int compat_pci_ata(struct ata_port *ap) | |
1056 | { | |
1057 | struct device *dev = ap->tdev.parent; | |
1058 | struct pci_dev *pdev; | |
1059 | ||
1060 | if (!is_pci_dev(dev)) | |
1061 | return 0; | |
1062 | ||
1063 | pdev = to_pci_dev(dev); | |
1064 | ||
1065 | if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && | |
1066 | (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) | |
1067 | return 0; | |
1068 | ||
1069 | return 1; | |
1070 | } | |
1071 | ||
1072 | static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) | |
1073 | { | |
1074 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
1075 | return -ENODEV; | |
1076 | ||
1077 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent), | |
1078 | ap->port_no); | |
1079 | ||
1080 | if (!*handle) | |
1081 | return -ENODEV; | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, | |
1087 | acpi_handle *handle) | |
1088 | { | |
1089 | struct ata_device *ata_dev; | |
1090 | ||
1091 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
1092 | ata_dev = &ap->link.device[sdev->channel]; | |
1093 | else | |
1094 | ata_dev = &ap->link.device[sdev->id]; | |
1095 | ||
1096 | *handle = dev_acpi_handle(ata_dev); | |
1097 | ||
1098 | if (!*handle) | |
1099 | return -ENODEV; | |
1100 | ||
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | static int is_ata_port(const struct device *dev) | |
1105 | { | |
1106 | return dev->type == &ata_port_type; | |
1107 | } | |
1108 | ||
1109 | static struct ata_port *dev_to_ata_port(struct device *dev) | |
1110 | { | |
1111 | while (!is_ata_port(dev)) { | |
1112 | if (!dev->parent) | |
1113 | return NULL; | |
1114 | dev = dev->parent; | |
1115 | } | |
1116 | return to_ata_port(dev); | |
1117 | } | |
1118 | ||
1119 | static int ata_acpi_find_device(struct device *dev, acpi_handle *handle) | |
1120 | { | |
1121 | struct ata_port *ap = dev_to_ata_port(dev); | |
1122 | ||
1123 | if (!ap) | |
1124 | return -ENODEV; | |
1125 | ||
1126 | if (!compat_pci_ata(ap)) | |
1127 | return -ENODEV; | |
1128 | ||
1129 | if (scsi_is_host_device(dev)) | |
1130 | return ata_acpi_bind_host(ap, handle); | |
1131 | else if (scsi_is_sdev_device(dev)) { | |
1132 | struct scsi_device *sdev = to_scsi_device(dev); | |
1133 | ||
1134 | return ata_acpi_bind_device(ap, sdev, handle); | |
1135 | } else | |
1136 | return -ENODEV; | |
1137 | } | |
1138 | ||
1139 | static int ata_acpi_find_dummy(struct device *dev, acpi_handle *handle) | |
1140 | { | |
1141 | return -ENODEV; | |
1142 | } | |
1143 | ||
1144 | static struct acpi_bus_type ata_acpi_bus = { | |
1145 | .find_bridge = ata_acpi_find_dummy, | |
1146 | .find_device = ata_acpi_find_device, | |
1147 | }; | |
1148 | ||
1149 | int ata_acpi_register(void) | |
1150 | { | |
1151 | return scsi_register_acpi_bus_type(&ata_acpi_bus); | |
1152 | } | |
1153 | ||
1154 | void ata_acpi_unregister(void) | |
1155 | { | |
1156 | scsi_unregister_acpi_bus_type(&ata_acpi_bus); | |
1157 | } |