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> |
3bd46600 | 19 | #include <linux/pm_runtime.h> |
237d8440 | 20 | #include <scsi/scsi_device.h> |
11ef697b KCA |
21 | #include "libata.h" |
22 | ||
23 | #include <acpi/acpi_bus.h> | |
11ef697b | 24 | |
110f66d2 | 25 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 26 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 27 | 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 | 28 | |
11ef697b | 29 | #define NO_PORT_MULT 0xffff |
2dcb407e | 30 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
31 | |
32 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
33 | struct ata_acpi_gtf { |
34 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
35 | } __packed; | |
11ef697b | 36 | |
ca426635 AC |
37 | /* |
38 | * Helper - belongs in the PCI layer somewhere eventually | |
39 | */ | |
40 | static int is_pci_dev(struct device *dev) | |
41 | { | |
42 | return (dev->bus == &pci_bus_type); | |
43 | } | |
11ef697b | 44 | |
398e0782 TH |
45 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
46 | { | |
47 | kfree(dev->gtf_cache); | |
48 | dev->gtf_cache = NULL; | |
49 | } | |
50 | ||
30dcf76a MG |
51 | /** |
52 | * ata_ap_acpi_handle - provide the acpi_handle for an ata_port | |
53 | * @ap: the acpi_handle returned will correspond to this port | |
54 | * | |
55 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
56 | * the ata_port passed into the function, or NULL if no such object exists | |
57 | */ | |
58 | acpi_handle ata_ap_acpi_handle(struct ata_port *ap) | |
6b66d958 MG |
59 | { |
60 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
61 | return NULL; | |
62 | ||
d66af4df AL |
63 | return ap->scsi_host ? |
64 | DEVICE_ACPI_HANDLE(&ap->scsi_host->shost_gendev) : NULL; | |
6b66d958 | 65 | } |
30dcf76a | 66 | EXPORT_SYMBOL(ata_ap_acpi_handle); |
6b66d958 | 67 | |
30dcf76a MG |
68 | /** |
69 | * ata_dev_acpi_handle - provide the acpi_handle for an ata_device | |
70 | * @dev: the acpi_device returned will correspond to this port | |
71 | * | |
72 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
73 | * the ata_device passed into the function, or NULL if no such object exists | |
74 | */ | |
75 | acpi_handle ata_dev_acpi_handle(struct ata_device *dev) | |
6b66d958 MG |
76 | { |
77 | acpi_integer adr; | |
78 | struct ata_port *ap = dev->link->ap; | |
79 | ||
19ccee76 | 80 | if (libata_noacpi || dev->flags & ATA_DFLAG_ACPI_DISABLED) |
0d0cdb02 AL |
81 | return NULL; |
82 | ||
6b66d958 MG |
83 | if (ap->flags & ATA_FLAG_ACPI_SATA) { |
84 | if (!sata_pmp_attached(ap)) | |
85 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
86 | else | |
87 | adr = SATA_ADR(ap->port_no, dev->link->pmp); | |
88 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), adr); | |
89 | } else | |
30dcf76a | 90 | return acpi_get_child(ata_ap_acpi_handle(ap), dev->devno); |
11ef697b | 91 | } |
30dcf76a | 92 | EXPORT_SYMBOL(ata_dev_acpi_handle); |
11ef697b | 93 | |
664d080c HM |
94 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
95 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
96 | { | |
97 | if (dev) | |
98 | dev->flags |= ATA_DFLAG_DETACH; | |
99 | else { | |
100 | struct ata_link *tlink; | |
101 | struct ata_device *tdev; | |
102 | ||
1eca4365 TH |
103 | ata_for_each_link(tlink, ap, EDGE) |
104 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
105 | tdev->flags |= ATA_DFLAG_DETACH; |
106 | } | |
107 | ||
108 | ata_port_schedule_eh(ap); | |
109 | } | |
110 | ||
111 | /** | |
112 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
113 | * @ap: ATA port ACPI event occurred | |
114 | * @dev: ATA device ACPI event occurred (can be NULL) | |
115 | * @event: ACPI event which occurred | |
664d080c HM |
116 | * |
117 | * All ACPI bay / device realted events end up in this function. If | |
118 | * the event is port-wide @dev is NULL. If the event is specific to a | |
119 | * device, @dev points to it. | |
120 | * | |
121 | * Hotplug (as opposed to unplug) notification is always handled as | |
122 | * port-wide while unplug only kills the target device on device-wide | |
123 | * event. | |
124 | * | |
125 | * LOCKING: | |
126 | * ACPI notify handler context. May sleep. | |
127 | */ | |
128 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 129 | u32 event) |
237d8440 | 130 | { |
664d080c | 131 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
132 | int wait = 0; |
133 | unsigned long flags; | |
3c1e3896 | 134 | |
664d080c | 135 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
136 | /* |
137 | * When dock driver calls into the routine, it will always use | |
138 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
139 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
140 | */ | |
233f1120 TH |
141 | switch (event) { |
142 | case ACPI_NOTIFY_BUS_CHECK: | |
143 | case ACPI_NOTIFY_DEVICE_CHECK: | |
144 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 145 | |
f730ae18 SL |
146 | ata_ehi_hotplugged(ehi); |
147 | ata_port_freeze(ap); | |
664d080c HM |
148 | break; |
149 | case ACPI_NOTIFY_EJECT_REQUEST: | |
150 | ata_ehi_push_desc(ehi, "ACPI event"); | |
151 | ||
664d080c HM |
152 | ata_acpi_detach_device(ap, dev); |
153 | wait = 1; | |
154 | break; | |
237d8440 MG |
155 | } |
156 | ||
ae6c23c4 MG |
157 | spin_unlock_irqrestore(ap->lock, flags); |
158 | ||
44521527 | 159 | if (wait) { |
ae6c23c4 | 160 | ata_port_wait_eh(ap); |
44521527 AL |
161 | flush_work(&ap->hotplug_task.work); |
162 | } | |
664d080c HM |
163 | } |
164 | ||
165 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
166 | { | |
167 | struct ata_device *dev = data; | |
168 | ||
f730ae18 | 169 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
170 | } |
171 | ||
172 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
173 | { | |
174 | struct ata_port *ap = data; | |
175 | ||
f730ae18 | 176 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
177 | } |
178 | ||
1253f7aa SL |
179 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
180 | u32 event) | |
181 | { | |
182 | struct kobject *kobj = NULL; | |
183 | char event_string[20]; | |
184 | char *envp[] = { event_string, NULL }; | |
185 | ||
186 | if (dev) { | |
187 | if (dev->sdev) | |
188 | kobj = &dev->sdev->sdev_gendev.kobj; | |
189 | } else | |
190 | kobj = &ap->dev->kobj; | |
191 | ||
192 | if (kobj) { | |
193 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
194 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
195 | } | |
196 | } | |
197 | ||
198 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
199 | { | |
200 | ata_acpi_uevent(data, NULL, event); | |
201 | } | |
202 | ||
203 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
204 | { | |
205 | struct ata_device *dev = data; | |
206 | ata_acpi_uevent(dev->link->ap, dev, event); | |
207 | } | |
208 | ||
9c8b04be | 209 | static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
1253f7aa SL |
210 | .handler = ata_acpi_dev_notify_dock, |
211 | .uevent = ata_acpi_dev_uevent, | |
212 | }; | |
213 | ||
9c8b04be | 214 | static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
1253f7aa SL |
215 | .handler = ata_acpi_ap_notify_dock, |
216 | .uevent = ata_acpi_ap_uevent, | |
217 | }; | |
218 | ||
44521527 AL |
219 | void ata_acpi_hotplug_init(struct ata_host *host) |
220 | { | |
221 | int i; | |
222 | ||
223 | for (i = 0; i < host->n_ports; i++) { | |
224 | struct ata_port *ap = host->ports[i]; | |
225 | acpi_handle handle; | |
226 | struct ata_device *dev; | |
227 | ||
228 | if (!ap) | |
229 | continue; | |
230 | ||
231 | handle = ata_ap_acpi_handle(ap); | |
232 | if (handle) { | |
233 | /* we might be on a docking station */ | |
234 | register_hotplug_dock_device(handle, | |
235 | &ata_acpi_ap_dock_ops, ap, | |
236 | NULL, NULL); | |
237 | } | |
238 | ||
239 | ata_for_each_dev(dev, &ap->link, ALL) { | |
240 | handle = ata_dev_acpi_handle(dev); | |
241 | if (!handle) | |
242 | continue; | |
243 | ||
244 | /* we might be on a docking station */ | |
245 | register_hotplug_dock_device(handle, | |
246 | &ata_acpi_dev_dock_ops, | |
247 | dev, NULL, NULL); | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
562f0c2d TH |
252 | /** |
253 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
254 | * @host: target ATA host | |
255 | * | |
256 | * This function is called during driver detach after the whole host | |
257 | * is shut down. | |
258 | * | |
259 | * LOCKING: | |
260 | * EH context. | |
261 | */ | |
262 | void ata_acpi_dissociate(struct ata_host *host) | |
263 | { | |
c05e6ff0 TH |
264 | int i; |
265 | ||
266 | /* Restore initial _GTM values so that driver which attaches | |
267 | * afterward can use them too. | |
268 | */ | |
269 | for (i = 0; i < host->n_ports; i++) { | |
270 | struct ata_port *ap = host->ports[i]; | |
271 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
272 | ||
30dcf76a | 273 | if (ata_ap_acpi_handle(ap) && gtm) |
c05e6ff0 TH |
274 | ata_acpi_stm(ap, gtm); |
275 | } | |
562f0c2d TH |
276 | } |
277 | ||
d66af4df AL |
278 | static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle, |
279 | struct ata_acpi_gtm *gtm) | |
64578a3d TH |
280 | { |
281 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
282 | union acpi_object *out_obj; | |
283 | acpi_status status; | |
284 | int rc = 0; | |
285 | ||
d66af4df | 286 | status = acpi_evaluate_object(handle, "_GTM", NULL, &output); |
64578a3d TH |
287 | |
288 | rc = -ENOENT; | |
289 | if (status == AE_NOT_FOUND) | |
290 | goto out_free; | |
291 | ||
292 | rc = -EINVAL; | |
293 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
294 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
295 | status); | |
64578a3d TH |
296 | goto out_free; |
297 | } | |
298 | ||
299 | out_obj = output.pointer; | |
300 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
a9a79dfe JP |
301 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
302 | out_obj->type); | |
64578a3d TH |
303 | |
304 | goto out_free; | |
305 | } | |
306 | ||
307 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
a9a79dfe JP |
308 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
309 | out_obj->buffer.length); | |
64578a3d TH |
310 | goto out_free; |
311 | } | |
312 | ||
313 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
314 | rc = 0; | |
315 | out_free: | |
316 | kfree(output.pointer); | |
317 | return rc; | |
318 | } | |
319 | ||
d66af4df AL |
320 | /** |
321 | * ata_acpi_gtm - execute _GTM | |
322 | * @ap: target ATA port | |
323 | * @gtm: out parameter for _GTM result | |
324 | * | |
325 | * Evaluate _GTM and store the result in @gtm. | |
326 | * | |
327 | * LOCKING: | |
328 | * EH context. | |
329 | * | |
330 | * RETURNS: | |
331 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
332 | */ | |
333 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
334 | { | |
335 | if (ata_ap_acpi_handle(ap)) | |
336 | return __ata_acpi_gtm(ap, ata_ap_acpi_handle(ap), gtm); | |
337 | else | |
338 | return -EINVAL; | |
339 | } | |
340 | ||
badff03d AC |
341 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
342 | ||
64578a3d TH |
343 | /** |
344 | * ata_acpi_stm - execute _STM | |
345 | * @ap: target ATA port | |
346 | * @stm: timing parameter to _STM | |
347 | * | |
348 | * Evaluate _STM with timing parameter @stm. | |
349 | * | |
350 | * LOCKING: | |
351 | * EH context. | |
352 | * | |
353 | * RETURNS: | |
354 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
355 | */ | |
0d02f0b2 | 356 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
357 | { |
358 | acpi_status status; | |
0d02f0b2 | 359 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
360 | struct acpi_object_list input; |
361 | union acpi_object in_params[3]; | |
362 | ||
363 | in_params[0].type = ACPI_TYPE_BUFFER; | |
364 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 365 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
366 | /* Buffers for id may need byteswapping ? */ |
367 | in_params[1].type = ACPI_TYPE_BUFFER; | |
368 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 369 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
370 | in_params[2].type = ACPI_TYPE_BUFFER; |
371 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 372 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
373 | |
374 | input.count = 3; | |
375 | input.pointer = in_params; | |
376 | ||
30dcf76a MG |
377 | status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input, |
378 | NULL); | |
64578a3d TH |
379 | |
380 | if (status == AE_NOT_FOUND) | |
381 | return -ENOENT; | |
382 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
383 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
384 | status); | |
64578a3d TH |
385 | return -EINVAL; |
386 | } | |
387 | return 0; | |
388 | } | |
389 | ||
badff03d AC |
390 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
391 | ||
11ef697b | 392 | /** |
4700c4bc | 393 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 394 | * @dev: target ATA device |
4700c4bc | 395 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
396 | * |
397 | * This applies to both PATA and SATA drives. | |
398 | * | |
399 | * The _GTF method has no input parameters. | |
400 | * It returns a variable number of register set values (registers | |
401 | * hex 1F1..1F7, taskfiles). | |
402 | * The <variable number> is not known in advance, so have ACPI-CA | |
403 | * allocate the buffer as needed and return it, then free it later. | |
404 | * | |
4700c4bc TH |
405 | * LOCKING: |
406 | * EH context. | |
407 | * | |
408 | * RETURNS: | |
66fa7f21 TH |
409 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
410 | * if _GTF is invalid. | |
11ef697b | 411 | */ |
398e0782 | 412 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 413 | { |
9af5c9c9 | 414 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 415 | acpi_status status; |
3a32a8e9 TH |
416 | struct acpi_buffer output; |
417 | union acpi_object *out_obj; | |
4700c4bc | 418 | int rc = 0; |
11ef697b | 419 | |
398e0782 TH |
420 | /* if _GTF is cached, use the cached value */ |
421 | if (dev->gtf_cache) { | |
422 | out_obj = dev->gtf_cache; | |
423 | goto done; | |
424 | } | |
425 | ||
4700c4bc TH |
426 | /* set up output buffer */ |
427 | output.length = ACPI_ALLOCATE_BUFFER; | |
428 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 429 | |
11ef697b | 430 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
431 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
432 | __func__, ap->port_no); | |
11ef697b | 433 | |
11ef697b | 434 | /* _GTF has no input parameters */ |
30dcf76a MG |
435 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
436 | &output); | |
398e0782 | 437 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 438 | |
11ef697b | 439 | if (ACPI_FAILURE(status)) { |
4700c4bc | 440 | if (status != AE_NOT_FOUND) { |
a9a79dfe JP |
441 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
442 | status); | |
66fa7f21 | 443 | rc = -EINVAL; |
4700c4bc TH |
444 | } |
445 | goto out_free; | |
11ef697b KCA |
446 | } |
447 | ||
448 | if (!output.length || !output.pointer) { | |
449 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
450 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
451 | __func__, | |
452 | (unsigned long long)output.length, | |
453 | output.pointer); | |
66fa7f21 | 454 | rc = -EINVAL; |
4700c4bc | 455 | goto out_free; |
11ef697b KCA |
456 | } |
457 | ||
11ef697b | 458 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
a9a79dfe JP |
459 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
460 | out_obj->type); | |
66fa7f21 | 461 | rc = -EINVAL; |
4700c4bc | 462 | goto out_free; |
11ef697b KCA |
463 | } |
464 | ||
4700c4bc | 465 | if (out_obj->buffer.length % REGS_PER_GTF) { |
a9a79dfe JP |
466 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
467 | out_obj->buffer.length); | |
66fa7f21 | 468 | rc = -EINVAL; |
4700c4bc | 469 | goto out_free; |
11ef697b KCA |
470 | } |
471 | ||
398e0782 | 472 | done: |
4700c4bc | 473 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
474 | if (gtf) { |
475 | *gtf = (void *)out_obj->buffer.pointer; | |
476 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
477 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
478 | __func__, *gtf, rc); | |
398e0782 | 479 | } |
4700c4bc TH |
480 | return rc; |
481 | ||
482 | out_free: | |
398e0782 | 483 | ata_acpi_clear_gtf(dev); |
4700c4bc | 484 | return rc; |
11ef697b KCA |
485 | } |
486 | ||
7c77fa4d TH |
487 | /** |
488 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
489 | * @dev: target device | |
490 | * @gtm: GTM parameter to use | |
491 | * | |
492 | * Determine xfermask for @dev from @gtm. | |
493 | * | |
494 | * LOCKING: | |
495 | * None. | |
496 | * | |
497 | * RETURNS: | |
498 | * Determined xfermask. | |
499 | */ | |
500 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
501 | const struct ata_acpi_gtm *gtm) | |
502 | { | |
a0f79b92 TH |
503 | unsigned long xfer_mask = 0; |
504 | unsigned int type; | |
505 | int unit; | |
506 | u8 mode; | |
7c77fa4d TH |
507 | |
508 | /* we always use the 0 slot for crap hardware */ | |
509 | unit = dev->devno; | |
510 | if (!(gtm->flags & 0x10)) | |
511 | unit = 0; | |
512 | ||
a0f79b92 TH |
513 | /* PIO */ |
514 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
515 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
516 | |
517 | /* See if we have MWDMA or UDMA data. We don't bother with | |
518 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
519 | * and our error changedown if it works is UDMA to PIO anyway. | |
520 | */ | |
a0f79b92 TH |
521 | if (!(gtm->flags & (1 << (2 * unit)))) |
522 | type = ATA_SHIFT_MWDMA; | |
523 | else | |
524 | type = ATA_SHIFT_UDMA; | |
525 | ||
526 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
527 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 528 | |
a0f79b92 | 529 | return xfer_mask; |
7c77fa4d TH |
530 | } |
531 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
532 | ||
e1ddb4b6 AC |
533 | /** |
534 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
535 | * @ap: Port to check | |
021ee9a6 | 536 | * @gtm: GTM data to use |
e1ddb4b6 | 537 | * |
021ee9a6 | 538 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 539 | */ |
021ee9a6 | 540 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 541 | { |
021ee9a6 TH |
542 | struct ata_device *dev; |
543 | ||
1eca4365 | 544 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
545 | unsigned long xfer_mask, udma_mask; |
546 | ||
021ee9a6 TH |
547 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
548 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
549 | ||
550 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
551 | return 1; | |
552 | } | |
553 | ||
e1ddb4b6 AC |
554 | return 0; |
555 | } | |
e1ddb4b6 AC |
556 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
557 | ||
3264a8d8 TH |
558 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
559 | const struct ata_acpi_gtf *gtf, | |
560 | struct ata_taskfile *tf) | |
561 | { | |
562 | ata_tf_init(dev, tf); | |
563 | ||
564 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
565 | tf->protocol = ATA_PROT_NODATA; | |
566 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
567 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
568 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
569 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
570 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
571 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
572 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
573 | } | |
574 | ||
110f66d2 TH |
575 | static int ata_acpi_filter_tf(struct ata_device *dev, |
576 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
577 | const struct ata_taskfile *ptf) |
578 | { | |
110f66d2 | 579 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
580 | /* libata doesn't use ACPI to configure transfer mode. |
581 | * It will only confuse device configuration. Skip. | |
582 | */ | |
583 | if (tf->command == ATA_CMD_SET_FEATURES && | |
584 | tf->feature == SETFEATURES_XFER) | |
585 | return 1; | |
586 | } | |
587 | ||
110f66d2 | 588 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
589 | /* BIOS writers, sorry but we don't wanna lock |
590 | * features unless the user explicitly said so. | |
591 | */ | |
592 | ||
593 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
594 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
595 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
596 | return 1; | |
597 | ||
598 | /* SECURITY FREEZE LOCK */ | |
599 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
600 | return 1; | |
601 | ||
602 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
603 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
604 | tf->command == ATA_CMD_SET_MAX && | |
605 | (tf->feature == ATA_SET_MAX_LOCK || | |
606 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
607 | return 1; | |
608 | } | |
609 | ||
fa5b561c TH |
610 | if (tf->command == ATA_CMD_SET_FEATURES && |
611 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 612 | /* inhibit enabling DIPM */ |
110f66d2 | 613 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
614 | tf->nsect == SATA_DIPM) |
615 | return 1; | |
fa5b561c TH |
616 | |
617 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 618 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
619 | (tf->nsect == SATA_FPDMA_OFFSET || |
620 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
621 | return 1; | |
622 | ||
623 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 624 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
625 | tf->nsect == SATA_FPDMA_AA) |
626 | return 1; | |
b344991a TH |
627 | } |
628 | ||
3264a8d8 TH |
629 | return 0; |
630 | } | |
631 | ||
11ef697b | 632 | /** |
0e8634bf | 633 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 634 | * @dev: target ATA device |
11ef697b KCA |
635 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
636 | * | |
3696df30 | 637 | * Outputs ATA taskfile to standard ATA host controller. |
11ef697b KCA |
638 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
639 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
640 | * hob_lbal, hob_lbam, and hob_lbah. | |
641 | * | |
642 | * This function waits for idle (!BUSY and !DRQ) after writing | |
643 | * registers. If the control register has a new value, this | |
644 | * function also waits for idle after writing control and before | |
645 | * writing the remaining registers. | |
646 | * | |
4700c4bc TH |
647 | * LOCKING: |
648 | * EH context. | |
649 | * | |
650 | * RETURNS: | |
3264a8d8 TH |
651 | * 1 if command is executed successfully. 0 if ignored, rejected or |
652 | * filtered out, -errno on other errors. | |
11ef697b | 653 | */ |
0e8634bf | 654 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
655 | const struct ata_acpi_gtf *gtf, |
656 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 657 | { |
3264a8d8 TH |
658 | struct ata_taskfile *pptf = NULL; |
659 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 660 | unsigned int err_mask; |
0e8634bf | 661 | const char *level; |
6521148c | 662 | const char *descr; |
0e8634bf TH |
663 | char msg[60]; |
664 | int rc; | |
fc16c25f | 665 | |
4700c4bc TH |
666 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
667 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
668 | && (gtf->tf[6] == 0)) | |
669 | return 0; | |
11ef697b | 670 | |
3264a8d8 TH |
671 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
672 | if (prev_gtf) { | |
673 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
674 | pptf = &ptf; | |
675 | } | |
676 | ||
110f66d2 | 677 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
678 | rtf = tf; |
679 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
680 | DMA_NONE, NULL, 0, 0); | |
681 | ||
682 | switch (err_mask) { | |
683 | case 0: | |
684 | level = KERN_DEBUG; | |
685 | snprintf(msg, sizeof(msg), "succeeded"); | |
686 | rc = 1; | |
687 | break; | |
688 | ||
689 | case AC_ERR_DEV: | |
690 | level = KERN_INFO; | |
691 | snprintf(msg, sizeof(msg), | |
692 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
693 | rtf.command, rtf.feature); | |
694 | rc = 0; | |
695 | break; | |
696 | ||
697 | default: | |
698 | level = KERN_ERR; | |
699 | snprintf(msg, sizeof(msg), | |
700 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
701 | err_mask, rtf.command, rtf.feature); | |
702 | rc = -EIO; | |
703 | break; | |
704 | } | |
705 | } else { | |
0e8634bf | 706 | level = KERN_INFO; |
3264a8d8 | 707 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 708 | rc = 0; |
4700c4bc | 709 | } |
6521148c | 710 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 711 | |
0e8634bf | 712 | ata_dev_printk(dev, level, |
6521148c | 713 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 714 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
715 | tf.lbam, tf.lbah, tf.device, |
716 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
717 | |
718 | return rc; | |
11ef697b KCA |
719 | } |
720 | ||
11ef697b KCA |
721 | /** |
722 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 723 | * @dev: target ATA device |
98a1708d | 724 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 725 | * |
98a1708d | 726 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
727 | * |
728 | * LOCKING: | |
729 | * EH context. | |
730 | * | |
731 | * RETURNS: | |
66fa7f21 TH |
732 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
733 | * -errno on other errors. | |
11ef697b | 734 | */ |
66fa7f21 | 735 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 736 | { |
3264a8d8 | 737 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
738 | int gtf_count, i, rc; |
739 | ||
740 | /* get taskfiles */ | |
66fa7f21 TH |
741 | rc = ata_dev_get_GTF(dev, >f); |
742 | if (rc < 0) | |
743 | return rc; | |
744 | gtf_count = rc; | |
6746544c TH |
745 | |
746 | /* execute them */ | |
3264a8d8 TH |
747 | for (i = 0; i < gtf_count; i++, gtf++) { |
748 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
749 | if (rc < 0) |
750 | break; | |
3264a8d8 | 751 | if (rc) { |
0e8634bf | 752 | (*nr_executed)++; |
3264a8d8 TH |
753 | pgtf = gtf; |
754 | } | |
11ef697b KCA |
755 | } |
756 | ||
398e0782 | 757 | ata_acpi_clear_gtf(dev); |
6746544c | 758 | |
0e8634bf TH |
759 | if (rc < 0) |
760 | return rc; | |
761 | return 0; | |
11ef697b KCA |
762 | } |
763 | ||
7ea1fbc2 KCA |
764 | /** |
765 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 766 | * @dev: target ATA device |
7ea1fbc2 KCA |
767 | * |
768 | * _SDD ACPI object: for SATA mode only | |
769 | * Must be after Identify (Packet) Device -- uses its data | |
770 | * ATM this function never returns a failure. It is an optional | |
771 | * method and if it fails for whatever reason, we should still | |
772 | * just keep going. | |
69b16a5f TH |
773 | * |
774 | * LOCKING: | |
775 | * EH context. | |
776 | * | |
777 | * RETURNS: | |
f2406770 | 778 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 779 | */ |
6746544c | 780 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 781 | { |
9af5c9c9 | 782 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
783 | acpi_status status; |
784 | struct acpi_object_list input; | |
785 | union acpi_object in_params[1]; | |
7ea1fbc2 | 786 | |
7ea1fbc2 | 787 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
788 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
789 | __func__, dev->devno, ap->port_no); | |
7ea1fbc2 | 790 | |
7ea1fbc2 KCA |
791 | /* Give the drive Identify data to the drive via the _SDD method */ |
792 | /* _SDD: set up input parameters */ | |
793 | input.count = 1; | |
794 | input.pointer = in_params; | |
795 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
796 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
797 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
798 | /* Output buffer: _SDD has no output */ |
799 | ||
800 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 801 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
30dcf76a MG |
802 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
803 | NULL); | |
3a32a8e9 | 804 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 805 | |
f2406770 TH |
806 | if (status == AE_NOT_FOUND) |
807 | return -ENOENT; | |
808 | ||
809 | if (ACPI_FAILURE(status)) { | |
a9a79dfe | 810 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
f2406770 TH |
811 | return -EIO; |
812 | } | |
7ea1fbc2 | 813 | |
f2406770 | 814 | return 0; |
6746544c TH |
815 | } |
816 | ||
64578a3d TH |
817 | /** |
818 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
819 | * @ap: target ATA port | |
820 | * | |
821 | * This function is called when @ap is about to be suspended. All | |
822 | * devices are already put to sleep but the port_suspend() callback | |
823 | * hasn't been executed yet. Error return from this function aborts | |
824 | * suspend. | |
825 | * | |
826 | * LOCKING: | |
827 | * EH context. | |
828 | * | |
829 | * RETURNS: | |
830 | * 0 on success, -errno on failure. | |
831 | */ | |
832 | int ata_acpi_on_suspend(struct ata_port *ap) | |
833 | { | |
c05e6ff0 TH |
834 | /* nada */ |
835 | return 0; | |
64578a3d TH |
836 | } |
837 | ||
6746544c TH |
838 | /** |
839 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
840 | * @ap: target ATA port | |
841 | * | |
842 | * This function is called when @ap is resumed - right after port | |
843 | * itself is resumed but before any EH action is taken. | |
844 | * | |
845 | * LOCKING: | |
846 | * EH context. | |
847 | */ | |
848 | void ata_acpi_on_resume(struct ata_port *ap) | |
849 | { | |
c05e6ff0 | 850 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 851 | struct ata_device *dev; |
6746544c | 852 | |
30dcf76a | 853 | if (ata_ap_acpi_handle(ap) && gtm) { |
398e0782 TH |
854 | /* _GTM valid */ |
855 | ||
856 | /* restore timing parameters */ | |
c05e6ff0 | 857 | ata_acpi_stm(ap, gtm); |
64578a3d | 858 | |
398e0782 TH |
859 | /* _GTF should immediately follow _STM so that it can |
860 | * use values set by _STM. Cache _GTF result and | |
861 | * schedule _GTF. | |
862 | */ | |
1eca4365 | 863 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 864 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
865 | if (ata_dev_enabled(dev) && |
866 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
867 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
868 | } | |
869 | } else { | |
870 | /* SATA _GTF needs to be evaulated after _SDD and | |
871 | * there's no reason to evaluate IDE _GTF early | |
872 | * without _STM. Clear cache and schedule _GTF. | |
873 | */ | |
1eca4365 | 874 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 875 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
876 | if (ata_dev_enabled(dev)) |
877 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
878 | } |
879 | } | |
7ea1fbc2 KCA |
880 | } |
881 | ||
a7ff60db | 882 | static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) |
21334205 AL |
883 | { |
884 | int d_max_in = ACPI_STATE_D3_COLD; | |
a7ff60db AL |
885 | if (!runtime) |
886 | goto out; | |
21334205 AL |
887 | |
888 | /* | |
889 | * For ATAPI, runtime D3 cold is only allowed | |
890 | * for ZPODD in zero power ready state | |
891 | */ | |
892 | if (dev->class == ATA_DEV_ATAPI && | |
893 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) | |
894 | d_max_in = ACPI_STATE_D3_HOT; | |
895 | ||
a7ff60db | 896 | out: |
21334205 AL |
897 | return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev, |
898 | NULL, d_max_in); | |
899 | } | |
900 | ||
a7ff60db | 901 | static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
bd3adca5 | 902 | { |
a7ff60db | 903 | bool runtime = PMSG_IS_AUTO(state); |
bd3adca5 | 904 | struct ata_device *dev; |
febe53ba | 905 | acpi_handle handle; |
3bd46600 | 906 | int acpi_state; |
bd3adca5 | 907 | |
1eca4365 | 908 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
febe53ba | 909 | handle = ata_dev_acpi_handle(dev); |
3bd46600 LM |
910 | if (!handle) |
911 | continue; | |
912 | ||
a7ff60db AL |
913 | if (!(state.event & PM_EVENT_RESUME)) { |
914 | acpi_state = ata_acpi_choose_suspend_state(dev, runtime); | |
21334205 AL |
915 | if (acpi_state == ACPI_STATE_D0) |
916 | continue; | |
a7ff60db | 917 | if (runtime && zpodd_dev_enabled(dev) && |
21334205 AL |
918 | acpi_state == ACPI_STATE_D3_COLD) |
919 | zpodd_enable_run_wake(dev); | |
920 | acpi_bus_set_power(handle, acpi_state); | |
3bd46600 | 921 | } else { |
a7ff60db | 922 | if (runtime && zpodd_dev_enabled(dev)) |
21334205 | 923 | zpodd_disable_run_wake(dev); |
3bd46600 LM |
924 | acpi_bus_set_power(handle, ACPI_STATE_D0); |
925 | } | |
bd3adca5 | 926 | } |
a7ff60db | 927 | } |
febe53ba | 928 | |
a7ff60db AL |
929 | /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ |
930 | static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
931 | { | |
932 | struct ata_device *dev; | |
933 | acpi_handle port_handle; | |
934 | ||
935 | port_handle = ata_ap_acpi_handle(ap); | |
936 | if (!port_handle) | |
937 | return; | |
938 | ||
939 | /* channel first and then drives for power on and vica versa | |
940 | for power off */ | |
941 | if (state.event & PM_EVENT_RESUME) | |
942 | acpi_bus_set_power(port_handle, ACPI_STATE_D0); | |
febe53ba | 943 | |
a7ff60db AL |
944 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
945 | acpi_handle dev_handle = ata_dev_acpi_handle(dev); | |
946 | if (!dev_handle) | |
947 | continue; | |
948 | ||
949 | acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? | |
950 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
951 | } | |
952 | ||
953 | if (!(state.event & PM_EVENT_RESUME)) | |
954 | acpi_bus_set_power(port_handle, ACPI_STATE_D3); | |
955 | } | |
956 | ||
957 | /** | |
958 | * ata_acpi_set_state - set the port power state | |
959 | * @ap: target ATA port | |
960 | * @state: state, on/off | |
961 | * | |
962 | * This function sets a proper ACPI D state for the device on | |
963 | * system and runtime PM operations. | |
964 | */ | |
965 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
966 | { | |
967 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
968 | sata_acpi_set_state(ap, state); | |
969 | else | |
970 | pata_acpi_set_state(ap, state); | |
bd3adca5 SL |
971 | } |
972 | ||
6746544c TH |
973 | /** |
974 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
975 | * @dev: target ATA device | |
976 | * | |
977 | * This function is called when @dev is about to be configured. | |
978 | * IDENTIFY data might have been modified after this hook is run. | |
979 | * | |
980 | * LOCKING: | |
981 | * EH context. | |
982 | * | |
983 | * RETURNS: | |
984 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
985 | * -errno on failure. | |
986 | */ | |
987 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
988 | { | |
9af5c9c9 TH |
989 | struct ata_port *ap = dev->link->ap; |
990 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 991 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 992 | int nr_executed = 0; |
6746544c TH |
993 | int rc; |
994 | ||
30dcf76a | 995 | if (!ata_dev_acpi_handle(dev)) |
6746544c TH |
996 | return 0; |
997 | ||
998 | /* do we need to do _GTF? */ | |
999 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
1000 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
1001 | return 0; | |
1002 | ||
1003 | /* do _SDD if SATA */ | |
1004 | if (acpi_sata) { | |
1005 | rc = ata_acpi_push_id(dev); | |
f2406770 | 1006 | if (rc && rc != -ENOENT) |
6746544c TH |
1007 | goto acpi_err; |
1008 | } | |
1009 | ||
1010 | /* do _GTF */ | |
66fa7f21 TH |
1011 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
1012 | if (rc) | |
6746544c TH |
1013 | goto acpi_err; |
1014 | ||
1015 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
1016 | ||
1017 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 1018 | if (nr_executed) { |
6746544c TH |
1019 | rc = ata_dev_reread_id(dev, 0); |
1020 | if (rc < 0) { | |
a9a79dfe JP |
1021 | ata_dev_err(dev, |
1022 | "failed to IDENTIFY after ACPI commands\n"); | |
6746544c TH |
1023 | return rc; |
1024 | } | |
1025 | } | |
1026 | ||
1027 | return 0; | |
1028 | ||
1029 | acpi_err: | |
66fa7f21 TH |
1030 | /* ignore evaluation failure if we can continue safely */ |
1031 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1032 | return 0; | |
6746544c | 1033 | |
66fa7f21 TH |
1034 | /* fail and let EH retry once more for unknown IO errors */ |
1035 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1036 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1037 | return rc; | |
6746544c | 1038 | } |
66fa7f21 | 1039 | |
0d0cdb02 | 1040 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
a9a79dfe | 1041 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
66fa7f21 TH |
1042 | |
1043 | /* We can safely continue if no _GTF command has been executed | |
1044 | * and port is not frozen. | |
1045 | */ | |
1046 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1047 | return 0; | |
1048 | ||
6746544c TH |
1049 | return rc; |
1050 | } | |
562f0c2d TH |
1051 | |
1052 | /** | |
1053 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1054 | * @dev: target ATA device | |
1055 | * | |
1056 | * This function is called when @dev is about to be disabled. | |
1057 | * | |
1058 | * LOCKING: | |
1059 | * EH context. | |
1060 | */ | |
1061 | void ata_acpi_on_disable(struct ata_device *dev) | |
1062 | { | |
398e0782 | 1063 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1064 | } |
6b66d958 MG |
1065 | |
1066 | static int compat_pci_ata(struct ata_port *ap) | |
1067 | { | |
1068 | struct device *dev = ap->tdev.parent; | |
1069 | struct pci_dev *pdev; | |
1070 | ||
1071 | if (!is_pci_dev(dev)) | |
1072 | return 0; | |
1073 | ||
1074 | pdev = to_pci_dev(dev); | |
1075 | ||
1076 | if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && | |
1077 | (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) | |
1078 | return 0; | |
1079 | ||
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) | |
1084 | { | |
19ccee76 | 1085 | if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA) |
6b66d958 MG |
1086 | return -ENODEV; |
1087 | ||
1088 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent), | |
1089 | ap->port_no); | |
1090 | ||
1091 | if (!*handle) | |
1092 | return -ENODEV; | |
1093 | ||
d66af4df | 1094 | if (__ata_acpi_gtm(ap, *handle, &ap->__acpi_init_gtm) == 0) |
83400917 AL |
1095 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; |
1096 | ||
6b66d958 MG |
1097 | return 0; |
1098 | } | |
1099 | ||
1100 | static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, | |
1101 | acpi_handle *handle) | |
1102 | { | |
1103 | struct ata_device *ata_dev; | |
1104 | ||
60817a68 AL |
1105 | if (ap->flags & ATA_FLAG_ACPI_SATA) { |
1106 | if (!sata_pmp_attached(ap)) | |
1107 | ata_dev = &ap->link.device[sdev->id]; | |
1108 | else | |
1109 | ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id]; | |
1110 | } | |
1111 | else { | |
6b66d958 | 1112 | ata_dev = &ap->link.device[sdev->id]; |
60817a68 | 1113 | } |
6b66d958 | 1114 | |
30dcf76a | 1115 | *handle = ata_dev_acpi_handle(ata_dev); |
6b66d958 MG |
1116 | |
1117 | if (!*handle) | |
1118 | return -ENODEV; | |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | static int is_ata_port(const struct device *dev) | |
1124 | { | |
1125 | return dev->type == &ata_port_type; | |
1126 | } | |
1127 | ||
1128 | static struct ata_port *dev_to_ata_port(struct device *dev) | |
1129 | { | |
1130 | while (!is_ata_port(dev)) { | |
1131 | if (!dev->parent) | |
1132 | return NULL; | |
1133 | dev = dev->parent; | |
1134 | } | |
1135 | return to_ata_port(dev); | |
1136 | } | |
1137 | ||
1138 | static int ata_acpi_find_device(struct device *dev, acpi_handle *handle) | |
1139 | { | |
1140 | struct ata_port *ap = dev_to_ata_port(dev); | |
1141 | ||
1142 | if (!ap) | |
1143 | return -ENODEV; | |
1144 | ||
1145 | if (!compat_pci_ata(ap)) | |
1146 | return -ENODEV; | |
1147 | ||
1148 | if (scsi_is_host_device(dev)) | |
1149 | return ata_acpi_bind_host(ap, handle); | |
1150 | else if (scsi_is_sdev_device(dev)) { | |
1151 | struct scsi_device *sdev = to_scsi_device(dev); | |
1152 | ||
1153 | return ata_acpi_bind_device(ap, sdev, handle); | |
1154 | } else | |
1155 | return -ENODEV; | |
1156 | } | |
1157 | ||
6b66d958 | 1158 | static struct acpi_bus_type ata_acpi_bus = { |
53540098 | 1159 | .name = "ATA", |
6b66d958 MG |
1160 | .find_device = ata_acpi_find_device, |
1161 | }; | |
1162 | ||
1163 | int ata_acpi_register(void) | |
1164 | { | |
1165 | return scsi_register_acpi_bus_type(&ata_acpi_bus); | |
1166 | } | |
1167 | ||
1168 | void ata_acpi_unregister(void) | |
1169 | { | |
1170 | scsi_unregister_acpi_bus_type(&ata_acpi_bus); | |
1171 | } |