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