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> |
a59b9aae | 20 | #include <linux/pm_qos.h> |
237d8440 | 21 | #include <scsi/scsi_device.h> |
11ef697b KCA |
22 | #include "libata.h" |
23 | ||
24 | #include <acpi/acpi_bus.h> | |
11ef697b | 25 | |
110f66d2 | 26 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 27 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 28 | 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 | 29 | |
11ef697b | 30 | #define NO_PORT_MULT 0xffff |
2dcb407e | 31 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
32 | |
33 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
34 | struct ata_acpi_gtf { |
35 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
36 | } __packed; | |
11ef697b | 37 | |
ca426635 AC |
38 | /* |
39 | * Helper - belongs in the PCI layer somewhere eventually | |
40 | */ | |
41 | static int is_pci_dev(struct device *dev) | |
42 | { | |
43 | return (dev->bus == &pci_bus_type); | |
44 | } | |
11ef697b | 45 | |
398e0782 TH |
46 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
47 | { | |
48 | kfree(dev->gtf_cache); | |
49 | dev->gtf_cache = NULL; | |
50 | } | |
51 | ||
30dcf76a MG |
52 | /** |
53 | * ata_ap_acpi_handle - provide the acpi_handle for an ata_port | |
54 | * @ap: the acpi_handle returned will correspond to this port | |
55 | * | |
56 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
57 | * the ata_port passed into the function, or NULL if no such object exists | |
58 | */ | |
59 | acpi_handle ata_ap_acpi_handle(struct ata_port *ap) | |
6b66d958 MG |
60 | { |
61 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
62 | return NULL; | |
63 | ||
83400917 | 64 | return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), ap->port_no); |
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 | ||
0d0cdb02 AL |
80 | if (dev->flags & ATA_DFLAG_ACPI_DISABLED) |
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 | ||
f730ae18 | 159 | if (wait) |
ae6c23c4 | 160 | ata_port_wait_eh(ap); |
664d080c HM |
161 | } |
162 | ||
163 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
164 | { | |
165 | struct ata_device *dev = data; | |
166 | ||
f730ae18 | 167 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
168 | } |
169 | ||
170 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
171 | { | |
172 | struct ata_port *ap = data; | |
173 | ||
f730ae18 | 174 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
175 | } |
176 | ||
1253f7aa SL |
177 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
178 | u32 event) | |
179 | { | |
180 | struct kobject *kobj = NULL; | |
181 | char event_string[20]; | |
182 | char *envp[] = { event_string, NULL }; | |
183 | ||
184 | if (dev) { | |
185 | if (dev->sdev) | |
186 | kobj = &dev->sdev->sdev_gendev.kobj; | |
187 | } else | |
188 | kobj = &ap->dev->kobj; | |
189 | ||
190 | if (kobj) { | |
191 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
192 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
193 | } | |
194 | } | |
195 | ||
196 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
197 | { | |
198 | ata_acpi_uevent(data, NULL, event); | |
199 | } | |
200 | ||
201 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
202 | { | |
203 | struct ata_device *dev = data; | |
204 | ata_acpi_uevent(dev->link->ap, dev, event); | |
205 | } | |
206 | ||
9c8b04be | 207 | static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
1253f7aa SL |
208 | .handler = ata_acpi_dev_notify_dock, |
209 | .uevent = ata_acpi_dev_uevent, | |
210 | }; | |
211 | ||
9c8b04be | 212 | static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
1253f7aa SL |
213 | .handler = ata_acpi_ap_notify_dock, |
214 | .uevent = ata_acpi_ap_uevent, | |
215 | }; | |
216 | ||
562f0c2d TH |
217 | /** |
218 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
219 | * @host: target ATA host | |
220 | * | |
221 | * This function is called during driver detach after the whole host | |
222 | * is shut down. | |
223 | * | |
224 | * LOCKING: | |
225 | * EH context. | |
226 | */ | |
227 | void ata_acpi_dissociate(struct ata_host *host) | |
228 | { | |
c05e6ff0 TH |
229 | int i; |
230 | ||
231 | /* Restore initial _GTM values so that driver which attaches | |
232 | * afterward can use them too. | |
233 | */ | |
234 | for (i = 0; i < host->n_ports; i++) { | |
235 | struct ata_port *ap = host->ports[i]; | |
236 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
237 | ||
30dcf76a | 238 | if (ata_ap_acpi_handle(ap) && gtm) |
c05e6ff0 TH |
239 | ata_acpi_stm(ap, gtm); |
240 | } | |
562f0c2d TH |
241 | } |
242 | ||
64578a3d TH |
243 | /** |
244 | * ata_acpi_gtm - execute _GTM | |
245 | * @ap: target ATA port | |
246 | * @gtm: out parameter for _GTM result | |
247 | * | |
248 | * Evaluate _GTM and store the result in @gtm. | |
249 | * | |
250 | * LOCKING: | |
251 | * EH context. | |
252 | * | |
253 | * RETURNS: | |
254 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
255 | */ | |
0d02f0b2 | 256 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
257 | { |
258 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
259 | union acpi_object *out_obj; | |
260 | acpi_status status; | |
261 | int rc = 0; | |
262 | ||
30dcf76a MG |
263 | status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_GTM", NULL, |
264 | &output); | |
64578a3d TH |
265 | |
266 | rc = -ENOENT; | |
267 | if (status == AE_NOT_FOUND) | |
268 | goto out_free; | |
269 | ||
270 | rc = -EINVAL; | |
271 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
272 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
273 | status); | |
64578a3d TH |
274 | goto out_free; |
275 | } | |
276 | ||
277 | out_obj = output.pointer; | |
278 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
a9a79dfe JP |
279 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
280 | out_obj->type); | |
64578a3d TH |
281 | |
282 | goto out_free; | |
283 | } | |
284 | ||
285 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
a9a79dfe JP |
286 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
287 | out_obj->buffer.length); | |
64578a3d TH |
288 | goto out_free; |
289 | } | |
290 | ||
291 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
292 | rc = 0; | |
293 | out_free: | |
294 | kfree(output.pointer); | |
295 | return rc; | |
296 | } | |
297 | ||
badff03d AC |
298 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
299 | ||
64578a3d TH |
300 | /** |
301 | * ata_acpi_stm - execute _STM | |
302 | * @ap: target ATA port | |
303 | * @stm: timing parameter to _STM | |
304 | * | |
305 | * Evaluate _STM with timing parameter @stm. | |
306 | * | |
307 | * LOCKING: | |
308 | * EH context. | |
309 | * | |
310 | * RETURNS: | |
311 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
312 | */ | |
0d02f0b2 | 313 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
314 | { |
315 | acpi_status status; | |
0d02f0b2 | 316 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
317 | struct acpi_object_list input; |
318 | union acpi_object in_params[3]; | |
319 | ||
320 | in_params[0].type = ACPI_TYPE_BUFFER; | |
321 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 322 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
323 | /* Buffers for id may need byteswapping ? */ |
324 | in_params[1].type = ACPI_TYPE_BUFFER; | |
325 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 326 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
327 | in_params[2].type = ACPI_TYPE_BUFFER; |
328 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 329 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
330 | |
331 | input.count = 3; | |
332 | input.pointer = in_params; | |
333 | ||
30dcf76a MG |
334 | status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input, |
335 | NULL); | |
64578a3d TH |
336 | |
337 | if (status == AE_NOT_FOUND) | |
338 | return -ENOENT; | |
339 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
340 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
341 | status); | |
64578a3d TH |
342 | return -EINVAL; |
343 | } | |
344 | return 0; | |
345 | } | |
346 | ||
badff03d AC |
347 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
348 | ||
11ef697b | 349 | /** |
4700c4bc | 350 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 351 | * @dev: target ATA device |
4700c4bc | 352 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
353 | * |
354 | * This applies to both PATA and SATA drives. | |
355 | * | |
356 | * The _GTF method has no input parameters. | |
357 | * It returns a variable number of register set values (registers | |
358 | * hex 1F1..1F7, taskfiles). | |
359 | * The <variable number> is not known in advance, so have ACPI-CA | |
360 | * allocate the buffer as needed and return it, then free it later. | |
361 | * | |
4700c4bc TH |
362 | * LOCKING: |
363 | * EH context. | |
364 | * | |
365 | * RETURNS: | |
66fa7f21 TH |
366 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
367 | * if _GTF is invalid. | |
11ef697b | 368 | */ |
398e0782 | 369 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 370 | { |
9af5c9c9 | 371 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 372 | acpi_status status; |
3a32a8e9 TH |
373 | struct acpi_buffer output; |
374 | union acpi_object *out_obj; | |
4700c4bc | 375 | int rc = 0; |
11ef697b | 376 | |
398e0782 TH |
377 | /* if _GTF is cached, use the cached value */ |
378 | if (dev->gtf_cache) { | |
379 | out_obj = dev->gtf_cache; | |
380 | goto done; | |
381 | } | |
382 | ||
4700c4bc TH |
383 | /* set up output buffer */ |
384 | output.length = ACPI_ALLOCATE_BUFFER; | |
385 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 386 | |
11ef697b | 387 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
388 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
389 | __func__, ap->port_no); | |
11ef697b | 390 | |
11ef697b | 391 | /* _GTF has no input parameters */ |
30dcf76a MG |
392 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
393 | &output); | |
398e0782 | 394 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 395 | |
11ef697b | 396 | if (ACPI_FAILURE(status)) { |
4700c4bc | 397 | if (status != AE_NOT_FOUND) { |
a9a79dfe JP |
398 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
399 | status); | |
66fa7f21 | 400 | rc = -EINVAL; |
4700c4bc TH |
401 | } |
402 | goto out_free; | |
11ef697b KCA |
403 | } |
404 | ||
405 | if (!output.length || !output.pointer) { | |
406 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
407 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
408 | __func__, | |
409 | (unsigned long long)output.length, | |
410 | output.pointer); | |
66fa7f21 | 411 | rc = -EINVAL; |
4700c4bc | 412 | goto out_free; |
11ef697b KCA |
413 | } |
414 | ||
11ef697b | 415 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
a9a79dfe JP |
416 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
417 | out_obj->type); | |
66fa7f21 | 418 | rc = -EINVAL; |
4700c4bc | 419 | goto out_free; |
11ef697b KCA |
420 | } |
421 | ||
4700c4bc | 422 | if (out_obj->buffer.length % REGS_PER_GTF) { |
a9a79dfe JP |
423 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
424 | out_obj->buffer.length); | |
66fa7f21 | 425 | rc = -EINVAL; |
4700c4bc | 426 | goto out_free; |
11ef697b KCA |
427 | } |
428 | ||
398e0782 | 429 | done: |
4700c4bc | 430 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
431 | if (gtf) { |
432 | *gtf = (void *)out_obj->buffer.pointer; | |
433 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
434 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
435 | __func__, *gtf, rc); | |
398e0782 | 436 | } |
4700c4bc TH |
437 | return rc; |
438 | ||
439 | out_free: | |
398e0782 | 440 | ata_acpi_clear_gtf(dev); |
4700c4bc | 441 | return rc; |
11ef697b KCA |
442 | } |
443 | ||
7c77fa4d TH |
444 | /** |
445 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
446 | * @dev: target device | |
447 | * @gtm: GTM parameter to use | |
448 | * | |
449 | * Determine xfermask for @dev from @gtm. | |
450 | * | |
451 | * LOCKING: | |
452 | * None. | |
453 | * | |
454 | * RETURNS: | |
455 | * Determined xfermask. | |
456 | */ | |
457 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
458 | const struct ata_acpi_gtm *gtm) | |
459 | { | |
a0f79b92 TH |
460 | unsigned long xfer_mask = 0; |
461 | unsigned int type; | |
462 | int unit; | |
463 | u8 mode; | |
7c77fa4d TH |
464 | |
465 | /* we always use the 0 slot for crap hardware */ | |
466 | unit = dev->devno; | |
467 | if (!(gtm->flags & 0x10)) | |
468 | unit = 0; | |
469 | ||
a0f79b92 TH |
470 | /* PIO */ |
471 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
472 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
473 | |
474 | /* See if we have MWDMA or UDMA data. We don't bother with | |
475 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
476 | * and our error changedown if it works is UDMA to PIO anyway. | |
477 | */ | |
a0f79b92 TH |
478 | if (!(gtm->flags & (1 << (2 * unit)))) |
479 | type = ATA_SHIFT_MWDMA; | |
480 | else | |
481 | type = ATA_SHIFT_UDMA; | |
482 | ||
483 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
484 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 485 | |
a0f79b92 | 486 | return xfer_mask; |
7c77fa4d TH |
487 | } |
488 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
489 | ||
e1ddb4b6 AC |
490 | /** |
491 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
492 | * @ap: Port to check | |
021ee9a6 | 493 | * @gtm: GTM data to use |
e1ddb4b6 | 494 | * |
021ee9a6 | 495 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 496 | */ |
021ee9a6 | 497 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 498 | { |
021ee9a6 TH |
499 | struct ata_device *dev; |
500 | ||
1eca4365 | 501 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
502 | unsigned long xfer_mask, udma_mask; |
503 | ||
021ee9a6 TH |
504 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
505 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
506 | ||
507 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
508 | return 1; | |
509 | } | |
510 | ||
e1ddb4b6 AC |
511 | return 0; |
512 | } | |
e1ddb4b6 AC |
513 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
514 | ||
3264a8d8 TH |
515 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
516 | const struct ata_acpi_gtf *gtf, | |
517 | struct ata_taskfile *tf) | |
518 | { | |
519 | ata_tf_init(dev, tf); | |
520 | ||
521 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
522 | tf->protocol = ATA_PROT_NODATA; | |
523 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
524 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
525 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
526 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
527 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
528 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
529 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
530 | } | |
531 | ||
110f66d2 TH |
532 | static int ata_acpi_filter_tf(struct ata_device *dev, |
533 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
534 | const struct ata_taskfile *ptf) |
535 | { | |
110f66d2 | 536 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
537 | /* libata doesn't use ACPI to configure transfer mode. |
538 | * It will only confuse device configuration. Skip. | |
539 | */ | |
540 | if (tf->command == ATA_CMD_SET_FEATURES && | |
541 | tf->feature == SETFEATURES_XFER) | |
542 | return 1; | |
543 | } | |
544 | ||
110f66d2 | 545 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
546 | /* BIOS writers, sorry but we don't wanna lock |
547 | * features unless the user explicitly said so. | |
548 | */ | |
549 | ||
550 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
551 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
552 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
553 | return 1; | |
554 | ||
555 | /* SECURITY FREEZE LOCK */ | |
556 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
557 | return 1; | |
558 | ||
559 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
560 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
561 | tf->command == ATA_CMD_SET_MAX && | |
562 | (tf->feature == ATA_SET_MAX_LOCK || | |
563 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
564 | return 1; | |
565 | } | |
566 | ||
fa5b561c TH |
567 | if (tf->command == ATA_CMD_SET_FEATURES && |
568 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 569 | /* inhibit enabling DIPM */ |
110f66d2 | 570 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
571 | tf->nsect == SATA_DIPM) |
572 | return 1; | |
fa5b561c TH |
573 | |
574 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 575 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
576 | (tf->nsect == SATA_FPDMA_OFFSET || |
577 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
578 | return 1; | |
579 | ||
580 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 581 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
582 | tf->nsect == SATA_FPDMA_AA) |
583 | return 1; | |
b344991a TH |
584 | } |
585 | ||
3264a8d8 TH |
586 | return 0; |
587 | } | |
588 | ||
11ef697b | 589 | /** |
0e8634bf | 590 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 591 | * @dev: target ATA device |
11ef697b KCA |
592 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
593 | * | |
3696df30 | 594 | * Outputs ATA taskfile to standard ATA host controller. |
11ef697b KCA |
595 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
596 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
597 | * hob_lbal, hob_lbam, and hob_lbah. | |
598 | * | |
599 | * This function waits for idle (!BUSY and !DRQ) after writing | |
600 | * registers. If the control register has a new value, this | |
601 | * function also waits for idle after writing control and before | |
602 | * writing the remaining registers. | |
603 | * | |
4700c4bc TH |
604 | * LOCKING: |
605 | * EH context. | |
606 | * | |
607 | * RETURNS: | |
3264a8d8 TH |
608 | * 1 if command is executed successfully. 0 if ignored, rejected or |
609 | * filtered out, -errno on other errors. | |
11ef697b | 610 | */ |
0e8634bf | 611 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
612 | const struct ata_acpi_gtf *gtf, |
613 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 614 | { |
3264a8d8 TH |
615 | struct ata_taskfile *pptf = NULL; |
616 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 617 | unsigned int err_mask; |
0e8634bf | 618 | const char *level; |
6521148c | 619 | const char *descr; |
0e8634bf TH |
620 | char msg[60]; |
621 | int rc; | |
fc16c25f | 622 | |
4700c4bc TH |
623 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
624 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
625 | && (gtf->tf[6] == 0)) | |
626 | return 0; | |
11ef697b | 627 | |
3264a8d8 TH |
628 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
629 | if (prev_gtf) { | |
630 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
631 | pptf = &ptf; | |
632 | } | |
633 | ||
110f66d2 | 634 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
635 | rtf = tf; |
636 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
637 | DMA_NONE, NULL, 0, 0); | |
638 | ||
639 | switch (err_mask) { | |
640 | case 0: | |
641 | level = KERN_DEBUG; | |
642 | snprintf(msg, sizeof(msg), "succeeded"); | |
643 | rc = 1; | |
644 | break; | |
645 | ||
646 | case AC_ERR_DEV: | |
647 | level = KERN_INFO; | |
648 | snprintf(msg, sizeof(msg), | |
649 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
650 | rtf.command, rtf.feature); | |
651 | rc = 0; | |
652 | break; | |
653 | ||
654 | default: | |
655 | level = KERN_ERR; | |
656 | snprintf(msg, sizeof(msg), | |
657 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
658 | err_mask, rtf.command, rtf.feature); | |
659 | rc = -EIO; | |
660 | break; | |
661 | } | |
662 | } else { | |
0e8634bf | 663 | level = KERN_INFO; |
3264a8d8 | 664 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 665 | rc = 0; |
4700c4bc | 666 | } |
6521148c | 667 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 668 | |
0e8634bf | 669 | ata_dev_printk(dev, level, |
6521148c | 670 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 671 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
672 | tf.lbam, tf.lbah, tf.device, |
673 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
674 | |
675 | return rc; | |
11ef697b KCA |
676 | } |
677 | ||
11ef697b KCA |
678 | /** |
679 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 680 | * @dev: target ATA device |
98a1708d | 681 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 682 | * |
98a1708d | 683 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
684 | * |
685 | * LOCKING: | |
686 | * EH context. | |
687 | * | |
688 | * RETURNS: | |
66fa7f21 TH |
689 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
690 | * -errno on other errors. | |
11ef697b | 691 | */ |
66fa7f21 | 692 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 693 | { |
3264a8d8 | 694 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
695 | int gtf_count, i, rc; |
696 | ||
697 | /* get taskfiles */ | |
66fa7f21 TH |
698 | rc = ata_dev_get_GTF(dev, >f); |
699 | if (rc < 0) | |
700 | return rc; | |
701 | gtf_count = rc; | |
6746544c TH |
702 | |
703 | /* execute them */ | |
3264a8d8 TH |
704 | for (i = 0; i < gtf_count; i++, gtf++) { |
705 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
706 | if (rc < 0) |
707 | break; | |
3264a8d8 | 708 | if (rc) { |
0e8634bf | 709 | (*nr_executed)++; |
3264a8d8 TH |
710 | pgtf = gtf; |
711 | } | |
11ef697b KCA |
712 | } |
713 | ||
398e0782 | 714 | ata_acpi_clear_gtf(dev); |
6746544c | 715 | |
0e8634bf TH |
716 | if (rc < 0) |
717 | return rc; | |
718 | return 0; | |
11ef697b KCA |
719 | } |
720 | ||
7ea1fbc2 KCA |
721 | /** |
722 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 723 | * @dev: target ATA device |
7ea1fbc2 KCA |
724 | * |
725 | * _SDD ACPI object: for SATA mode only | |
726 | * Must be after Identify (Packet) Device -- uses its data | |
727 | * ATM this function never returns a failure. It is an optional | |
728 | * method and if it fails for whatever reason, we should still | |
729 | * just keep going. | |
69b16a5f TH |
730 | * |
731 | * LOCKING: | |
732 | * EH context. | |
733 | * | |
734 | * RETURNS: | |
f2406770 | 735 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 736 | */ |
6746544c | 737 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 738 | { |
9af5c9c9 | 739 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
740 | acpi_status status; |
741 | struct acpi_object_list input; | |
742 | union acpi_object in_params[1]; | |
7ea1fbc2 | 743 | |
7ea1fbc2 | 744 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
745 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
746 | __func__, dev->devno, ap->port_no); | |
7ea1fbc2 | 747 | |
7ea1fbc2 KCA |
748 | /* Give the drive Identify data to the drive via the _SDD method */ |
749 | /* _SDD: set up input parameters */ | |
750 | input.count = 1; | |
751 | input.pointer = in_params; | |
752 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
753 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
754 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
755 | /* Output buffer: _SDD has no output */ |
756 | ||
757 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 758 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
30dcf76a MG |
759 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
760 | NULL); | |
3a32a8e9 | 761 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 762 | |
f2406770 TH |
763 | if (status == AE_NOT_FOUND) |
764 | return -ENOENT; | |
765 | ||
766 | if (ACPI_FAILURE(status)) { | |
a9a79dfe | 767 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
f2406770 TH |
768 | return -EIO; |
769 | } | |
7ea1fbc2 | 770 | |
f2406770 | 771 | return 0; |
6746544c TH |
772 | } |
773 | ||
64578a3d TH |
774 | /** |
775 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
776 | * @ap: target ATA port | |
777 | * | |
778 | * This function is called when @ap is about to be suspended. All | |
779 | * devices are already put to sleep but the port_suspend() callback | |
780 | * hasn't been executed yet. Error return from this function aborts | |
781 | * suspend. | |
782 | * | |
783 | * LOCKING: | |
784 | * EH context. | |
785 | * | |
786 | * RETURNS: | |
787 | * 0 on success, -errno on failure. | |
788 | */ | |
789 | int ata_acpi_on_suspend(struct ata_port *ap) | |
790 | { | |
c05e6ff0 TH |
791 | /* nada */ |
792 | return 0; | |
64578a3d TH |
793 | } |
794 | ||
6746544c TH |
795 | /** |
796 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
797 | * @ap: target ATA port | |
798 | * | |
799 | * This function is called when @ap is resumed - right after port | |
800 | * itself is resumed but before any EH action is taken. | |
801 | * | |
802 | * LOCKING: | |
803 | * EH context. | |
804 | */ | |
805 | void ata_acpi_on_resume(struct ata_port *ap) | |
806 | { | |
c05e6ff0 | 807 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 808 | struct ata_device *dev; |
6746544c | 809 | |
30dcf76a | 810 | if (ata_ap_acpi_handle(ap) && gtm) { |
398e0782 TH |
811 | /* _GTM valid */ |
812 | ||
813 | /* restore timing parameters */ | |
c05e6ff0 | 814 | ata_acpi_stm(ap, gtm); |
64578a3d | 815 | |
398e0782 TH |
816 | /* _GTF should immediately follow _STM so that it can |
817 | * use values set by _STM. Cache _GTF result and | |
818 | * schedule _GTF. | |
819 | */ | |
1eca4365 | 820 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 821 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
822 | if (ata_dev_enabled(dev) && |
823 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
824 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
825 | } | |
826 | } else { | |
827 | /* SATA _GTF needs to be evaulated after _SDD and | |
828 | * there's no reason to evaluate IDE _GTF early | |
829 | * without _STM. Clear cache and schedule _GTF. | |
830 | */ | |
1eca4365 | 831 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 832 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
833 | if (ata_dev_enabled(dev)) |
834 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
835 | } |
836 | } | |
7ea1fbc2 KCA |
837 | } |
838 | ||
21334205 AL |
839 | static int ata_acpi_choose_suspend_state(struct ata_device *dev) |
840 | { | |
841 | int d_max_in = ACPI_STATE_D3_COLD; | |
842 | ||
843 | /* | |
844 | * For ATAPI, runtime D3 cold is only allowed | |
845 | * for ZPODD in zero power ready state | |
846 | */ | |
847 | if (dev->class == ATA_DEV_ATAPI && | |
848 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) | |
849 | d_max_in = ACPI_STATE_D3_HOT; | |
850 | ||
851 | return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev, | |
852 | NULL, d_max_in); | |
853 | } | |
854 | ||
bd3adca5 SL |
855 | /** |
856 | * ata_acpi_set_state - set the port power state | |
857 | * @ap: target ATA port | |
858 | * @state: state, on/off | |
859 | * | |
860 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
861 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
862 | */ | |
863 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
864 | { | |
865 | struct ata_device *dev; | |
febe53ba | 866 | acpi_handle handle; |
3bd46600 | 867 | int acpi_state; |
bd3adca5 SL |
868 | |
869 | /* channel first and then drives for power on and vica versa | |
870 | for power off */ | |
febe53ba LM |
871 | handle = ata_ap_acpi_handle(ap); |
872 | if (handle && state.event == PM_EVENT_ON) | |
873 | acpi_bus_set_power(handle, ACPI_STATE_D0); | |
bd3adca5 | 874 | |
1eca4365 | 875 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
febe53ba | 876 | handle = ata_dev_acpi_handle(dev); |
3bd46600 LM |
877 | if (!handle) |
878 | continue; | |
879 | ||
880 | if (state.event != PM_EVENT_ON) { | |
21334205 AL |
881 | acpi_state = ata_acpi_choose_suspend_state(dev); |
882 | if (acpi_state == ACPI_STATE_D0) | |
883 | continue; | |
884 | if (zpodd_dev_enabled(dev) && | |
885 | acpi_state == ACPI_STATE_D3_COLD) | |
886 | zpodd_enable_run_wake(dev); | |
887 | acpi_bus_set_power(handle, acpi_state); | |
3bd46600 | 888 | } else { |
21334205 AL |
889 | if (zpodd_dev_enabled(dev)) |
890 | zpodd_disable_run_wake(dev); | |
3bd46600 LM |
891 | acpi_bus_set_power(handle, ACPI_STATE_D0); |
892 | } | |
bd3adca5 | 893 | } |
febe53ba LM |
894 | |
895 | handle = ata_ap_acpi_handle(ap); | |
896 | if (handle && state.event != PM_EVENT_ON) | |
897 | acpi_bus_set_power(handle, ACPI_STATE_D3); | |
bd3adca5 SL |
898 | } |
899 | ||
6746544c TH |
900 | /** |
901 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
902 | * @dev: target ATA device | |
903 | * | |
904 | * This function is called when @dev is about to be configured. | |
905 | * IDENTIFY data might have been modified after this hook is run. | |
906 | * | |
907 | * LOCKING: | |
908 | * EH context. | |
909 | * | |
910 | * RETURNS: | |
911 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
912 | * -errno on failure. | |
913 | */ | |
914 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
915 | { | |
9af5c9c9 TH |
916 | struct ata_port *ap = dev->link->ap; |
917 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 918 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 919 | int nr_executed = 0; |
6746544c TH |
920 | int rc; |
921 | ||
30dcf76a | 922 | if (!ata_dev_acpi_handle(dev)) |
6746544c TH |
923 | return 0; |
924 | ||
925 | /* do we need to do _GTF? */ | |
926 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
927 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
928 | return 0; | |
929 | ||
930 | /* do _SDD if SATA */ | |
931 | if (acpi_sata) { | |
932 | rc = ata_acpi_push_id(dev); | |
f2406770 | 933 | if (rc && rc != -ENOENT) |
6746544c TH |
934 | goto acpi_err; |
935 | } | |
936 | ||
937 | /* do _GTF */ | |
66fa7f21 TH |
938 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
939 | if (rc) | |
6746544c TH |
940 | goto acpi_err; |
941 | ||
942 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
943 | ||
944 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 945 | if (nr_executed) { |
6746544c TH |
946 | rc = ata_dev_reread_id(dev, 0); |
947 | if (rc < 0) { | |
a9a79dfe JP |
948 | ata_dev_err(dev, |
949 | "failed to IDENTIFY after ACPI commands\n"); | |
6746544c TH |
950 | return rc; |
951 | } | |
952 | } | |
953 | ||
954 | return 0; | |
955 | ||
956 | acpi_err: | |
66fa7f21 TH |
957 | /* ignore evaluation failure if we can continue safely */ |
958 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
959 | return 0; | |
6746544c | 960 | |
66fa7f21 TH |
961 | /* fail and let EH retry once more for unknown IO errors */ |
962 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
963 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
964 | return rc; | |
6746544c | 965 | } |
66fa7f21 | 966 | |
0d0cdb02 | 967 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
a9a79dfe | 968 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
66fa7f21 TH |
969 | |
970 | /* We can safely continue if no _GTF command has been executed | |
971 | * and port is not frozen. | |
972 | */ | |
973 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
974 | return 0; | |
975 | ||
6746544c TH |
976 | return rc; |
977 | } | |
562f0c2d TH |
978 | |
979 | /** | |
980 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
981 | * @dev: target ATA device | |
982 | * | |
983 | * This function is called when @dev is about to be disabled. | |
984 | * | |
985 | * LOCKING: | |
986 | * EH context. | |
987 | */ | |
988 | void ata_acpi_on_disable(struct ata_device *dev) | |
989 | { | |
398e0782 | 990 | ata_acpi_clear_gtf(dev); |
562f0c2d | 991 | } |
6b66d958 | 992 | |
a606dac3 LM |
993 | static void ata_acpi_register_power_resource(struct ata_device *dev) |
994 | { | |
995 | struct scsi_device *sdev = dev->sdev; | |
996 | acpi_handle handle; | |
997 | struct device *device; | |
998 | ||
999 | handle = ata_dev_acpi_handle(dev); | |
1000 | if (!handle) | |
1001 | return; | |
1002 | ||
1003 | device = &sdev->sdev_gendev; | |
1004 | ||
1005 | acpi_power_resource_register_device(device, handle); | |
1006 | } | |
1007 | ||
1008 | static void ata_acpi_unregister_power_resource(struct ata_device *dev) | |
1009 | { | |
1010 | struct scsi_device *sdev = dev->sdev; | |
1011 | acpi_handle handle; | |
1012 | struct device *device; | |
1013 | ||
1014 | handle = ata_dev_acpi_handle(dev); | |
1015 | if (!handle) | |
1016 | return; | |
1017 | ||
1018 | device = &sdev->sdev_gendev; | |
1019 | ||
1020 | acpi_power_resource_unregister_device(device, handle); | |
1021 | } | |
1022 | ||
3bd46600 LM |
1023 | void ata_acpi_bind(struct ata_device *dev) |
1024 | { | |
a606dac3 | 1025 | ata_acpi_register_power_resource(dev); |
a59b9aae AL |
1026 | if (zpodd_dev_enabled(dev)) |
1027 | dev_pm_qos_expose_flags(&dev->sdev->sdev_gendev, 0); | |
3bd46600 LM |
1028 | } |
1029 | ||
1030 | void ata_acpi_unbind(struct ata_device *dev) | |
1031 | { | |
a606dac3 | 1032 | ata_acpi_unregister_power_resource(dev); |
3bd46600 LM |
1033 | } |
1034 | ||
6b66d958 MG |
1035 | static int compat_pci_ata(struct ata_port *ap) |
1036 | { | |
1037 | struct device *dev = ap->tdev.parent; | |
1038 | struct pci_dev *pdev; | |
1039 | ||
1040 | if (!is_pci_dev(dev)) | |
1041 | return 0; | |
1042 | ||
1043 | pdev = to_pci_dev(dev); | |
1044 | ||
1045 | if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && | |
1046 | (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) | |
1047 | return 0; | |
1048 | ||
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) | |
1053 | { | |
1054 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
1055 | return -ENODEV; | |
1056 | ||
1057 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent), | |
1058 | ap->port_no); | |
1059 | ||
1060 | if (!*handle) | |
1061 | return -ENODEV; | |
1062 | ||
83400917 AL |
1063 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) |
1064 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
1065 | ||
6b66d958 MG |
1066 | return 0; |
1067 | } | |
1068 | ||
1069 | static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, | |
1070 | acpi_handle *handle) | |
1071 | { | |
1072 | struct ata_device *ata_dev; | |
1073 | ||
60817a68 AL |
1074 | if (ap->flags & ATA_FLAG_ACPI_SATA) { |
1075 | if (!sata_pmp_attached(ap)) | |
1076 | ata_dev = &ap->link.device[sdev->id]; | |
1077 | else | |
1078 | ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id]; | |
1079 | } | |
1080 | else { | |
6b66d958 | 1081 | ata_dev = &ap->link.device[sdev->id]; |
60817a68 | 1082 | } |
6b66d958 | 1083 | |
30dcf76a | 1084 | *handle = ata_dev_acpi_handle(ata_dev); |
6b66d958 MG |
1085 | |
1086 | if (!*handle) | |
1087 | return -ENODEV; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | static int is_ata_port(const struct device *dev) | |
1093 | { | |
1094 | return dev->type == &ata_port_type; | |
1095 | } | |
1096 | ||
1097 | static struct ata_port *dev_to_ata_port(struct device *dev) | |
1098 | { | |
1099 | while (!is_ata_port(dev)) { | |
1100 | if (!dev->parent) | |
1101 | return NULL; | |
1102 | dev = dev->parent; | |
1103 | } | |
1104 | return to_ata_port(dev); | |
1105 | } | |
1106 | ||
1107 | static int ata_acpi_find_device(struct device *dev, acpi_handle *handle) | |
1108 | { | |
1109 | struct ata_port *ap = dev_to_ata_port(dev); | |
1110 | ||
1111 | if (!ap) | |
1112 | return -ENODEV; | |
1113 | ||
1114 | if (!compat_pci_ata(ap)) | |
1115 | return -ENODEV; | |
1116 | ||
1117 | if (scsi_is_host_device(dev)) | |
1118 | return ata_acpi_bind_host(ap, handle); | |
1119 | else if (scsi_is_sdev_device(dev)) { | |
1120 | struct scsi_device *sdev = to_scsi_device(dev); | |
1121 | ||
1122 | return ata_acpi_bind_device(ap, sdev, handle); | |
1123 | } else | |
1124 | return -ENODEV; | |
1125 | } | |
1126 | ||
1127 | static int ata_acpi_find_dummy(struct device *dev, acpi_handle *handle) | |
1128 | { | |
1129 | return -ENODEV; | |
1130 | } | |
1131 | ||
1132 | static struct acpi_bus_type ata_acpi_bus = { | |
1133 | .find_bridge = ata_acpi_find_dummy, | |
1134 | .find_device = ata_acpi_find_device, | |
1135 | }; | |
1136 | ||
1137 | int ata_acpi_register(void) | |
1138 | { | |
1139 | return scsi_register_acpi_bus_type(&ata_acpi_bus); | |
1140 | } | |
1141 | ||
1142 | void ata_acpi_unregister(void) | |
1143 | { | |
1144 | scsi_unregister_acpi_bus_type(&ata_acpi_bus); | |
1145 | } |