]>
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 | ||
110f66d2 | 23 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 24 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 25 | 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 | 26 | |
11ef697b | 27 | #define NO_PORT_MULT 0xffff |
2dcb407e | 28 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
29 | |
30 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
31 | struct ata_acpi_gtf { |
32 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
33 | } __packed; | |
11ef697b | 34 | |
398e0782 TH |
35 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
36 | { | |
37 | kfree(dev->gtf_cache); | |
38 | dev->gtf_cache = NULL; | |
39 | } | |
40 | ||
30dcf76a MG |
41 | /** |
42 | * ata_dev_acpi_handle - provide the acpi_handle for an ata_device | |
f1bc1e4c | 43 | * @dev: the acpi_handle returned will correspond to this device |
30dcf76a MG |
44 | * |
45 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
46 | * the ata_device passed into the function, or NULL if no such object exists | |
f1bc1e4c | 47 | * or ACPI is disabled for this device due to consecutive errors. |
30dcf76a MG |
48 | */ |
49 | acpi_handle ata_dev_acpi_handle(struct ata_device *dev) | |
6b66d958 | 50 | { |
f1bc1e4c AL |
51 | return dev->flags & ATA_DFLAG_ACPI_DISABLED ? |
52 | NULL : ACPI_HANDLE(&dev->tdev); | |
11ef697b KCA |
53 | } |
54 | ||
664d080c HM |
55 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
56 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
57 | { | |
58 | if (dev) | |
59 | dev->flags |= ATA_DFLAG_DETACH; | |
60 | else { | |
61 | struct ata_link *tlink; | |
62 | struct ata_device *tdev; | |
63 | ||
1eca4365 TH |
64 | ata_for_each_link(tlink, ap, EDGE) |
65 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
66 | tdev->flags |= ATA_DFLAG_DETACH; |
67 | } | |
68 | ||
69 | ata_port_schedule_eh(ap); | |
70 | } | |
71 | ||
72 | /** | |
73 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
74 | * @ap: ATA port ACPI event occurred | |
75 | * @dev: ATA device ACPI event occurred (can be NULL) | |
76 | * @event: ACPI event which occurred | |
664d080c HM |
77 | * |
78 | * All ACPI bay / device realted events end up in this function. If | |
79 | * the event is port-wide @dev is NULL. If the event is specific to a | |
80 | * device, @dev points to it. | |
81 | * | |
82 | * Hotplug (as opposed to unplug) notification is always handled as | |
83 | * port-wide while unplug only kills the target device on device-wide | |
84 | * event. | |
85 | * | |
86 | * LOCKING: | |
87 | * ACPI notify handler context. May sleep. | |
88 | */ | |
89 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 90 | u32 event) |
237d8440 | 91 | { |
664d080c | 92 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
93 | int wait = 0; |
94 | unsigned long flags; | |
3c1e3896 | 95 | |
664d080c | 96 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
97 | /* |
98 | * When dock driver calls into the routine, it will always use | |
99 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
100 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
101 | */ | |
233f1120 TH |
102 | switch (event) { |
103 | case ACPI_NOTIFY_BUS_CHECK: | |
104 | case ACPI_NOTIFY_DEVICE_CHECK: | |
105 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 106 | |
f730ae18 SL |
107 | ata_ehi_hotplugged(ehi); |
108 | ata_port_freeze(ap); | |
664d080c HM |
109 | break; |
110 | case ACPI_NOTIFY_EJECT_REQUEST: | |
111 | ata_ehi_push_desc(ehi, "ACPI event"); | |
112 | ||
664d080c HM |
113 | ata_acpi_detach_device(ap, dev); |
114 | wait = 1; | |
115 | break; | |
237d8440 MG |
116 | } |
117 | ||
ae6c23c4 MG |
118 | spin_unlock_irqrestore(ap->lock, flags); |
119 | ||
f1bc1e4c | 120 | if (wait) |
ae6c23c4 | 121 | ata_port_wait_eh(ap); |
664d080c HM |
122 | } |
123 | ||
124 | static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) | |
125 | { | |
126 | struct ata_device *dev = data; | |
127 | ||
f730ae18 | 128 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
664d080c HM |
129 | } |
130 | ||
131 | static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) | |
132 | { | |
133 | struct ata_port *ap = data; | |
134 | ||
f730ae18 | 135 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
136 | } |
137 | ||
1253f7aa SL |
138 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
139 | u32 event) | |
140 | { | |
141 | struct kobject *kobj = NULL; | |
142 | char event_string[20]; | |
143 | char *envp[] = { event_string, NULL }; | |
144 | ||
145 | if (dev) { | |
146 | if (dev->sdev) | |
147 | kobj = &dev->sdev->sdev_gendev.kobj; | |
148 | } else | |
149 | kobj = &ap->dev->kobj; | |
150 | ||
151 | if (kobj) { | |
152 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
153 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
154 | } | |
155 | } | |
156 | ||
157 | static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) | |
158 | { | |
159 | ata_acpi_uevent(data, NULL, event); | |
160 | } | |
161 | ||
162 | static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) | |
163 | { | |
164 | struct ata_device *dev = data; | |
165 | ata_acpi_uevent(dev->link->ap, dev, event); | |
166 | } | |
167 | ||
9c8b04be | 168 | static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
1253f7aa SL |
169 | .handler = ata_acpi_dev_notify_dock, |
170 | .uevent = ata_acpi_dev_uevent, | |
171 | }; | |
172 | ||
9c8b04be | 173 | static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
1253f7aa SL |
174 | .handler = ata_acpi_ap_notify_dock, |
175 | .uevent = ata_acpi_ap_uevent, | |
176 | }; | |
177 | ||
f1bc1e4c AL |
178 | /* bind acpi handle to pata port */ |
179 | void ata_acpi_bind_port(struct ata_port *ap) | |
44521527 | 180 | { |
9c5ad36d | 181 | struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); |
44521527 | 182 | |
9c5ad36d | 183 | if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion) |
f1bc1e4c | 184 | return; |
44521527 | 185 | |
9c5ad36d | 186 | acpi_preset_companion(&ap->tdev, host_companion, ap->port_no); |
44521527 | 187 | |
f1bc1e4c AL |
188 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) |
189 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
44521527 | 190 | |
f1bc1e4c AL |
191 | /* we might be on a docking station */ |
192 | register_hotplug_dock_device(ACPI_HANDLE(&ap->tdev), | |
193 | &ata_acpi_ap_dock_ops, ap, NULL, NULL); | |
194 | } | |
44521527 | 195 | |
f1bc1e4c AL |
196 | void ata_acpi_bind_dev(struct ata_device *dev) |
197 | { | |
198 | struct ata_port *ap = dev->link->ap; | |
9c5ad36d RW |
199 | struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev); |
200 | struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); | |
201 | struct acpi_device *parent; | |
f1bc1e4c AL |
202 | u64 adr; |
203 | ||
204 | /* | |
9c5ad36d RW |
205 | * For both sata/pata devices, host companion device is required. |
206 | * For pata device, port companion device is also required. | |
f1bc1e4c | 207 | */ |
9c5ad36d RW |
208 | if (libata_noacpi || !host_companion || |
209 | (!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_companion)) | |
f1bc1e4c AL |
210 | return; |
211 | ||
212 | if (ap->flags & ATA_FLAG_ACPI_SATA) { | |
213 | if (!sata_pmp_attached(ap)) | |
214 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
215 | else | |
216 | adr = SATA_ADR(ap->port_no, dev->link->pmp); | |
9c5ad36d | 217 | parent = host_companion; |
f1bc1e4c AL |
218 | } else { |
219 | adr = dev->devno; | |
9c5ad36d | 220 | parent = port_companion; |
44521527 | 221 | } |
f1bc1e4c | 222 | |
9c5ad36d | 223 | acpi_preset_companion(&dev->tdev, parent, adr); |
f1bc1e4c AL |
224 | |
225 | register_hotplug_dock_device(ata_dev_acpi_handle(dev), | |
226 | &ata_acpi_dev_dock_ops, dev, NULL, NULL); | |
44521527 AL |
227 | } |
228 | ||
562f0c2d TH |
229 | /** |
230 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
231 | * @host: target ATA host | |
232 | * | |
233 | * This function is called during driver detach after the whole host | |
234 | * is shut down. | |
235 | * | |
236 | * LOCKING: | |
237 | * EH context. | |
238 | */ | |
239 | void ata_acpi_dissociate(struct ata_host *host) | |
240 | { | |
c05e6ff0 TH |
241 | int i; |
242 | ||
243 | /* Restore initial _GTM values so that driver which attaches | |
244 | * afterward can use them too. | |
245 | */ | |
246 | for (i = 0; i < host->n_ports; i++) { | |
247 | struct ata_port *ap = host->ports[i]; | |
248 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
249 | ||
f1bc1e4c | 250 | if (ACPI_HANDLE(&ap->tdev) && gtm) |
c05e6ff0 TH |
251 | ata_acpi_stm(ap, gtm); |
252 | } | |
562f0c2d TH |
253 | } |
254 | ||
f1bc1e4c AL |
255 | /** |
256 | * ata_acpi_gtm - execute _GTM | |
257 | * @ap: target ATA port | |
258 | * @gtm: out parameter for _GTM result | |
259 | * | |
260 | * Evaluate _GTM and store the result in @gtm. | |
261 | * | |
262 | * LOCKING: | |
263 | * EH context. | |
264 | * | |
265 | * RETURNS: | |
266 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
267 | */ | |
268 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
64578a3d TH |
269 | { |
270 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
271 | union acpi_object *out_obj; | |
272 | acpi_status status; | |
273 | int rc = 0; | |
f1bc1e4c AL |
274 | acpi_handle handle = ACPI_HANDLE(&ap->tdev); |
275 | ||
276 | if (!handle) | |
277 | return -EINVAL; | |
64578a3d | 278 | |
d66af4df | 279 | status = acpi_evaluate_object(handle, "_GTM", NULL, &output); |
64578a3d TH |
280 | |
281 | rc = -ENOENT; | |
282 | if (status == AE_NOT_FOUND) | |
283 | goto out_free; | |
284 | ||
285 | rc = -EINVAL; | |
286 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
287 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
288 | status); | |
64578a3d TH |
289 | goto out_free; |
290 | } | |
291 | ||
292 | out_obj = output.pointer; | |
293 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
a9a79dfe JP |
294 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
295 | out_obj->type); | |
64578a3d TH |
296 | |
297 | goto out_free; | |
298 | } | |
299 | ||
300 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
a9a79dfe JP |
301 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
302 | out_obj->buffer.length); | |
64578a3d TH |
303 | goto out_free; |
304 | } | |
305 | ||
306 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
307 | rc = 0; | |
308 | out_free: | |
309 | kfree(output.pointer); | |
310 | return rc; | |
311 | } | |
312 | ||
badff03d AC |
313 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
314 | ||
64578a3d TH |
315 | /** |
316 | * ata_acpi_stm - execute _STM | |
317 | * @ap: target ATA port | |
318 | * @stm: timing parameter to _STM | |
319 | * | |
320 | * Evaluate _STM with timing parameter @stm. | |
321 | * | |
322 | * LOCKING: | |
323 | * EH context. | |
324 | * | |
325 | * RETURNS: | |
326 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
327 | */ | |
0d02f0b2 | 328 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
329 | { |
330 | acpi_status status; | |
0d02f0b2 | 331 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
332 | struct acpi_object_list input; |
333 | union acpi_object in_params[3]; | |
334 | ||
335 | in_params[0].type = ACPI_TYPE_BUFFER; | |
336 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 337 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
338 | /* Buffers for id may need byteswapping ? */ |
339 | in_params[1].type = ACPI_TYPE_BUFFER; | |
340 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 341 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
342 | in_params[2].type = ACPI_TYPE_BUFFER; |
343 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 344 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
345 | |
346 | input.count = 3; | |
347 | input.pointer = in_params; | |
348 | ||
f1bc1e4c AL |
349 | status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM", |
350 | &input, NULL); | |
64578a3d TH |
351 | |
352 | if (status == AE_NOT_FOUND) | |
353 | return -ENOENT; | |
354 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
355 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
356 | status); | |
64578a3d TH |
357 | return -EINVAL; |
358 | } | |
359 | return 0; | |
360 | } | |
361 | ||
badff03d AC |
362 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
363 | ||
11ef697b | 364 | /** |
4700c4bc | 365 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 366 | * @dev: target ATA device |
4700c4bc | 367 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
368 | * |
369 | * This applies to both PATA and SATA drives. | |
370 | * | |
371 | * The _GTF method has no input parameters. | |
372 | * It returns a variable number of register set values (registers | |
373 | * hex 1F1..1F7, taskfiles). | |
374 | * The <variable number> is not known in advance, so have ACPI-CA | |
375 | * allocate the buffer as needed and return it, then free it later. | |
376 | * | |
4700c4bc TH |
377 | * LOCKING: |
378 | * EH context. | |
379 | * | |
380 | * RETURNS: | |
66fa7f21 TH |
381 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
382 | * if _GTF is invalid. | |
11ef697b | 383 | */ |
398e0782 | 384 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 385 | { |
9af5c9c9 | 386 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 387 | acpi_status status; |
3a32a8e9 TH |
388 | struct acpi_buffer output; |
389 | union acpi_object *out_obj; | |
4700c4bc | 390 | int rc = 0; |
11ef697b | 391 | |
398e0782 TH |
392 | /* if _GTF is cached, use the cached value */ |
393 | if (dev->gtf_cache) { | |
394 | out_obj = dev->gtf_cache; | |
395 | goto done; | |
396 | } | |
397 | ||
4700c4bc TH |
398 | /* set up output buffer */ |
399 | output.length = ACPI_ALLOCATE_BUFFER; | |
400 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 401 | |
11ef697b | 402 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
403 | ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
404 | __func__, ap->port_no); | |
11ef697b | 405 | |
11ef697b | 406 | /* _GTF has no input parameters */ |
30dcf76a MG |
407 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
408 | &output); | |
398e0782 | 409 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 410 | |
11ef697b | 411 | if (ACPI_FAILURE(status)) { |
4700c4bc | 412 | if (status != AE_NOT_FOUND) { |
a9a79dfe JP |
413 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
414 | status); | |
66fa7f21 | 415 | rc = -EINVAL; |
4700c4bc TH |
416 | } |
417 | goto out_free; | |
11ef697b KCA |
418 | } |
419 | ||
420 | if (!output.length || !output.pointer) { | |
421 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
422 | ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
423 | __func__, | |
424 | (unsigned long long)output.length, | |
425 | output.pointer); | |
66fa7f21 | 426 | rc = -EINVAL; |
4700c4bc | 427 | goto out_free; |
11ef697b KCA |
428 | } |
429 | ||
11ef697b | 430 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
a9a79dfe JP |
431 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
432 | out_obj->type); | |
66fa7f21 | 433 | rc = -EINVAL; |
4700c4bc | 434 | goto out_free; |
11ef697b KCA |
435 | } |
436 | ||
4700c4bc | 437 | if (out_obj->buffer.length % REGS_PER_GTF) { |
a9a79dfe JP |
438 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
439 | out_obj->buffer.length); | |
66fa7f21 | 440 | rc = -EINVAL; |
4700c4bc | 441 | goto out_free; |
11ef697b KCA |
442 | } |
443 | ||
398e0782 | 444 | done: |
4700c4bc | 445 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
446 | if (gtf) { |
447 | *gtf = (void *)out_obj->buffer.pointer; | |
448 | if (ata_msg_probe(ap)) | |
a9a79dfe JP |
449 | ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
450 | __func__, *gtf, rc); | |
398e0782 | 451 | } |
4700c4bc TH |
452 | return rc; |
453 | ||
454 | out_free: | |
398e0782 | 455 | ata_acpi_clear_gtf(dev); |
4700c4bc | 456 | return rc; |
11ef697b KCA |
457 | } |
458 | ||
7c77fa4d TH |
459 | /** |
460 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
461 | * @dev: target device | |
462 | * @gtm: GTM parameter to use | |
463 | * | |
464 | * Determine xfermask for @dev from @gtm. | |
465 | * | |
466 | * LOCKING: | |
467 | * None. | |
468 | * | |
469 | * RETURNS: | |
470 | * Determined xfermask. | |
471 | */ | |
472 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
473 | const struct ata_acpi_gtm *gtm) | |
474 | { | |
a0f79b92 TH |
475 | unsigned long xfer_mask = 0; |
476 | unsigned int type; | |
477 | int unit; | |
478 | u8 mode; | |
7c77fa4d TH |
479 | |
480 | /* we always use the 0 slot for crap hardware */ | |
481 | unit = dev->devno; | |
482 | if (!(gtm->flags & 0x10)) | |
483 | unit = 0; | |
484 | ||
a0f79b92 TH |
485 | /* PIO */ |
486 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
487 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
488 | |
489 | /* See if we have MWDMA or UDMA data. We don't bother with | |
490 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
491 | * and our error changedown if it works is UDMA to PIO anyway. | |
492 | */ | |
a0f79b92 TH |
493 | if (!(gtm->flags & (1 << (2 * unit)))) |
494 | type = ATA_SHIFT_MWDMA; | |
495 | else | |
496 | type = ATA_SHIFT_UDMA; | |
497 | ||
498 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
499 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 500 | |
a0f79b92 | 501 | return xfer_mask; |
7c77fa4d TH |
502 | } |
503 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
504 | ||
e1ddb4b6 AC |
505 | /** |
506 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
507 | * @ap: Port to check | |
021ee9a6 | 508 | * @gtm: GTM data to use |
e1ddb4b6 | 509 | * |
021ee9a6 | 510 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 511 | */ |
021ee9a6 | 512 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 513 | { |
021ee9a6 TH |
514 | struct ata_device *dev; |
515 | ||
1eca4365 | 516 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
021ee9a6 TH |
517 | unsigned long xfer_mask, udma_mask; |
518 | ||
021ee9a6 TH |
519 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
520 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
521 | ||
522 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
523 | return 1; | |
524 | } | |
525 | ||
e1ddb4b6 AC |
526 | return 0; |
527 | } | |
e1ddb4b6 AC |
528 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
529 | ||
3264a8d8 TH |
530 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
531 | const struct ata_acpi_gtf *gtf, | |
532 | struct ata_taskfile *tf) | |
533 | { | |
534 | ata_tf_init(dev, tf); | |
535 | ||
536 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
537 | tf->protocol = ATA_PROT_NODATA; | |
538 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
539 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
540 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
541 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
542 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
543 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
544 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
545 | } | |
546 | ||
110f66d2 TH |
547 | static int ata_acpi_filter_tf(struct ata_device *dev, |
548 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
549 | const struct ata_taskfile *ptf) |
550 | { | |
110f66d2 | 551 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
552 | /* libata doesn't use ACPI to configure transfer mode. |
553 | * It will only confuse device configuration. Skip. | |
554 | */ | |
555 | if (tf->command == ATA_CMD_SET_FEATURES && | |
556 | tf->feature == SETFEATURES_XFER) | |
557 | return 1; | |
558 | } | |
559 | ||
110f66d2 | 560 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
561 | /* BIOS writers, sorry but we don't wanna lock |
562 | * features unless the user explicitly said so. | |
563 | */ | |
564 | ||
565 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
566 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
567 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
568 | return 1; | |
569 | ||
570 | /* SECURITY FREEZE LOCK */ | |
571 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
572 | return 1; | |
573 | ||
574 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
575 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
576 | tf->command == ATA_CMD_SET_MAX && | |
577 | (tf->feature == ATA_SET_MAX_LOCK || | |
578 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
579 | return 1; | |
580 | } | |
581 | ||
fa5b561c TH |
582 | if (tf->command == ATA_CMD_SET_FEATURES && |
583 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 584 | /* inhibit enabling DIPM */ |
110f66d2 | 585 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
586 | tf->nsect == SATA_DIPM) |
587 | return 1; | |
fa5b561c TH |
588 | |
589 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 590 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
591 | (tf->nsect == SATA_FPDMA_OFFSET || |
592 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
593 | return 1; | |
594 | ||
595 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 596 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
597 | tf->nsect == SATA_FPDMA_AA) |
598 | return 1; | |
b344991a TH |
599 | } |
600 | ||
3264a8d8 TH |
601 | return 0; |
602 | } | |
603 | ||
11ef697b | 604 | /** |
0e8634bf | 605 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 606 | * @dev: target ATA device |
11ef697b KCA |
607 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
608 | * | |
3696df30 | 609 | * Outputs ATA taskfile to standard ATA host controller. |
11ef697b KCA |
610 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
611 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
612 | * hob_lbal, hob_lbam, and hob_lbah. | |
613 | * | |
614 | * This function waits for idle (!BUSY and !DRQ) after writing | |
615 | * registers. If the control register has a new value, this | |
616 | * function also waits for idle after writing control and before | |
617 | * writing the remaining registers. | |
618 | * | |
4700c4bc TH |
619 | * LOCKING: |
620 | * EH context. | |
621 | * | |
622 | * RETURNS: | |
3264a8d8 TH |
623 | * 1 if command is executed successfully. 0 if ignored, rejected or |
624 | * filtered out, -errno on other errors. | |
11ef697b | 625 | */ |
0e8634bf | 626 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
627 | const struct ata_acpi_gtf *gtf, |
628 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 629 | { |
3264a8d8 TH |
630 | struct ata_taskfile *pptf = NULL; |
631 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 632 | unsigned int err_mask; |
0e8634bf | 633 | const char *level; |
6521148c | 634 | const char *descr; |
0e8634bf TH |
635 | char msg[60]; |
636 | int rc; | |
fc16c25f | 637 | |
4700c4bc TH |
638 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
639 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
640 | && (gtf->tf[6] == 0)) | |
641 | return 0; | |
11ef697b | 642 | |
3264a8d8 TH |
643 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
644 | if (prev_gtf) { | |
645 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
646 | pptf = &ptf; | |
647 | } | |
648 | ||
110f66d2 | 649 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
650 | rtf = tf; |
651 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
652 | DMA_NONE, NULL, 0, 0); | |
653 | ||
654 | switch (err_mask) { | |
655 | case 0: | |
656 | level = KERN_DEBUG; | |
657 | snprintf(msg, sizeof(msg), "succeeded"); | |
658 | rc = 1; | |
659 | break; | |
660 | ||
661 | case AC_ERR_DEV: | |
662 | level = KERN_INFO; | |
663 | snprintf(msg, sizeof(msg), | |
664 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
665 | rtf.command, rtf.feature); | |
666 | rc = 0; | |
667 | break; | |
668 | ||
669 | default: | |
670 | level = KERN_ERR; | |
671 | snprintf(msg, sizeof(msg), | |
672 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
673 | err_mask, rtf.command, rtf.feature); | |
674 | rc = -EIO; | |
675 | break; | |
676 | } | |
677 | } else { | |
0e8634bf | 678 | level = KERN_INFO; |
3264a8d8 | 679 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 680 | rc = 0; |
4700c4bc | 681 | } |
6521148c | 682 | descr = ata_get_cmd_descript(tf.command); |
4700c4bc | 683 | |
0e8634bf | 684 | ata_dev_printk(dev, level, |
6521148c | 685 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
0e8634bf | 686 | tf.command, tf.feature, tf.nsect, tf.lbal, |
6521148c RH |
687 | tf.lbam, tf.lbah, tf.device, |
688 | (descr ? descr : "unknown"), msg); | |
0e8634bf TH |
689 | |
690 | return rc; | |
11ef697b KCA |
691 | } |
692 | ||
11ef697b KCA |
693 | /** |
694 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 695 | * @dev: target ATA device |
98a1708d | 696 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 697 | * |
98a1708d | 698 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
699 | * |
700 | * LOCKING: | |
701 | * EH context. | |
702 | * | |
703 | * RETURNS: | |
66fa7f21 TH |
704 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
705 | * -errno on other errors. | |
11ef697b | 706 | */ |
66fa7f21 | 707 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 708 | { |
3264a8d8 | 709 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
710 | int gtf_count, i, rc; |
711 | ||
712 | /* get taskfiles */ | |
66fa7f21 TH |
713 | rc = ata_dev_get_GTF(dev, >f); |
714 | if (rc < 0) | |
715 | return rc; | |
716 | gtf_count = rc; | |
6746544c TH |
717 | |
718 | /* execute them */ | |
3264a8d8 TH |
719 | for (i = 0; i < gtf_count; i++, gtf++) { |
720 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
721 | if (rc < 0) |
722 | break; | |
3264a8d8 | 723 | if (rc) { |
0e8634bf | 724 | (*nr_executed)++; |
3264a8d8 TH |
725 | pgtf = gtf; |
726 | } | |
11ef697b KCA |
727 | } |
728 | ||
398e0782 | 729 | ata_acpi_clear_gtf(dev); |
6746544c | 730 | |
0e8634bf TH |
731 | if (rc < 0) |
732 | return rc; | |
733 | return 0; | |
11ef697b KCA |
734 | } |
735 | ||
7ea1fbc2 KCA |
736 | /** |
737 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 738 | * @dev: target ATA device |
7ea1fbc2 KCA |
739 | * |
740 | * _SDD ACPI object: for SATA mode only | |
741 | * Must be after Identify (Packet) Device -- uses its data | |
742 | * ATM this function never returns a failure. It is an optional | |
743 | * method and if it fails for whatever reason, we should still | |
744 | * just keep going. | |
69b16a5f TH |
745 | * |
746 | * LOCKING: | |
747 | * EH context. | |
748 | * | |
749 | * RETURNS: | |
f2406770 | 750 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 751 | */ |
6746544c | 752 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 753 | { |
9af5c9c9 | 754 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
755 | acpi_status status; |
756 | struct acpi_object_list input; | |
757 | union acpi_object in_params[1]; | |
7ea1fbc2 | 758 | |
7ea1fbc2 | 759 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
760 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
761 | __func__, dev->devno, ap->port_no); | |
7ea1fbc2 | 762 | |
7ea1fbc2 KCA |
763 | /* Give the drive Identify data to the drive via the _SDD method */ |
764 | /* _SDD: set up input parameters */ | |
765 | input.count = 1; | |
766 | input.pointer = in_params; | |
767 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
768 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
769 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
770 | /* Output buffer: _SDD has no output */ |
771 | ||
772 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 773 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
30dcf76a MG |
774 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
775 | NULL); | |
3a32a8e9 | 776 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 777 | |
f2406770 TH |
778 | if (status == AE_NOT_FOUND) |
779 | return -ENOENT; | |
780 | ||
781 | if (ACPI_FAILURE(status)) { | |
a9a79dfe | 782 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
f2406770 TH |
783 | return -EIO; |
784 | } | |
7ea1fbc2 | 785 | |
f2406770 | 786 | return 0; |
6746544c TH |
787 | } |
788 | ||
64578a3d TH |
789 | /** |
790 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
791 | * @ap: target ATA port | |
792 | * | |
793 | * This function is called when @ap is about to be suspended. All | |
794 | * devices are already put to sleep but the port_suspend() callback | |
795 | * hasn't been executed yet. Error return from this function aborts | |
796 | * suspend. | |
797 | * | |
798 | * LOCKING: | |
799 | * EH context. | |
800 | * | |
801 | * RETURNS: | |
802 | * 0 on success, -errno on failure. | |
803 | */ | |
804 | int ata_acpi_on_suspend(struct ata_port *ap) | |
805 | { | |
c05e6ff0 TH |
806 | /* nada */ |
807 | return 0; | |
64578a3d TH |
808 | } |
809 | ||
6746544c TH |
810 | /** |
811 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
812 | * @ap: target ATA port | |
813 | * | |
814 | * This function is called when @ap is resumed - right after port | |
815 | * itself is resumed but before any EH action is taken. | |
816 | * | |
817 | * LOCKING: | |
818 | * EH context. | |
819 | */ | |
820 | void ata_acpi_on_resume(struct ata_port *ap) | |
821 | { | |
c05e6ff0 | 822 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 823 | struct ata_device *dev; |
6746544c | 824 | |
f1bc1e4c | 825 | if (ACPI_HANDLE(&ap->tdev) && gtm) { |
398e0782 TH |
826 | /* _GTM valid */ |
827 | ||
828 | /* restore timing parameters */ | |
c05e6ff0 | 829 | ata_acpi_stm(ap, gtm); |
64578a3d | 830 | |
398e0782 TH |
831 | /* _GTF should immediately follow _STM so that it can |
832 | * use values set by _STM. Cache _GTF result and | |
833 | * schedule _GTF. | |
834 | */ | |
1eca4365 | 835 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 836 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
837 | if (ata_dev_enabled(dev) && |
838 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
839 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
840 | } | |
841 | } else { | |
842 | /* SATA _GTF needs to be evaulated after _SDD and | |
843 | * there's no reason to evaluate IDE _GTF early | |
844 | * without _STM. Clear cache and schedule _GTF. | |
845 | */ | |
1eca4365 | 846 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 847 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
848 | if (ata_dev_enabled(dev)) |
849 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
850 | } |
851 | } | |
7ea1fbc2 KCA |
852 | } |
853 | ||
a7ff60db | 854 | static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) |
21334205 AL |
855 | { |
856 | int d_max_in = ACPI_STATE_D3_COLD; | |
a7ff60db AL |
857 | if (!runtime) |
858 | goto out; | |
21334205 AL |
859 | |
860 | /* | |
861 | * For ATAPI, runtime D3 cold is only allowed | |
862 | * for ZPODD in zero power ready state | |
863 | */ | |
864 | if (dev->class == ATA_DEV_ATAPI && | |
865 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) | |
866 | d_max_in = ACPI_STATE_D3_HOT; | |
867 | ||
a7ff60db | 868 | out: |
f1bc1e4c | 869 | return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in); |
21334205 AL |
870 | } |
871 | ||
a7ff60db | 872 | static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
bd3adca5 | 873 | { |
a7ff60db | 874 | bool runtime = PMSG_IS_AUTO(state); |
bd3adca5 | 875 | struct ata_device *dev; |
febe53ba | 876 | acpi_handle handle; |
3bd46600 | 877 | int acpi_state; |
bd3adca5 | 878 | |
1eca4365 | 879 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
febe53ba | 880 | handle = ata_dev_acpi_handle(dev); |
3bd46600 LM |
881 | if (!handle) |
882 | continue; | |
883 | ||
a7ff60db AL |
884 | if (!(state.event & PM_EVENT_RESUME)) { |
885 | acpi_state = ata_acpi_choose_suspend_state(dev, runtime); | |
21334205 AL |
886 | if (acpi_state == ACPI_STATE_D0) |
887 | continue; | |
a7ff60db | 888 | if (runtime && zpodd_dev_enabled(dev) && |
21334205 AL |
889 | acpi_state == ACPI_STATE_D3_COLD) |
890 | zpodd_enable_run_wake(dev); | |
891 | acpi_bus_set_power(handle, acpi_state); | |
3bd46600 | 892 | } else { |
a7ff60db | 893 | if (runtime && zpodd_dev_enabled(dev)) |
21334205 | 894 | zpodd_disable_run_wake(dev); |
3bd46600 LM |
895 | acpi_bus_set_power(handle, ACPI_STATE_D0); |
896 | } | |
bd3adca5 | 897 | } |
a7ff60db | 898 | } |
febe53ba | 899 | |
a7ff60db AL |
900 | /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ |
901 | static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
902 | { | |
903 | struct ata_device *dev; | |
904 | acpi_handle port_handle; | |
905 | ||
f1bc1e4c | 906 | port_handle = ACPI_HANDLE(&ap->tdev); |
a7ff60db AL |
907 | if (!port_handle) |
908 | return; | |
909 | ||
910 | /* channel first and then drives for power on and vica versa | |
911 | for power off */ | |
912 | if (state.event & PM_EVENT_RESUME) | |
913 | acpi_bus_set_power(port_handle, ACPI_STATE_D0); | |
febe53ba | 914 | |
a7ff60db AL |
915 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
916 | acpi_handle dev_handle = ata_dev_acpi_handle(dev); | |
917 | if (!dev_handle) | |
918 | continue; | |
919 | ||
920 | acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? | |
8ad928d5 | 921 | ACPI_STATE_D0 : ACPI_STATE_D3_COLD); |
a7ff60db AL |
922 | } |
923 | ||
924 | if (!(state.event & PM_EVENT_RESUME)) | |
8ad928d5 | 925 | acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD); |
a7ff60db AL |
926 | } |
927 | ||
928 | /** | |
929 | * ata_acpi_set_state - set the port power state | |
930 | * @ap: target ATA port | |
931 | * @state: state, on/off | |
932 | * | |
933 | * This function sets a proper ACPI D state for the device on | |
934 | * system and runtime PM operations. | |
935 | */ | |
936 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
937 | { | |
938 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
939 | sata_acpi_set_state(ap, state); | |
940 | else | |
941 | pata_acpi_set_state(ap, state); | |
bd3adca5 SL |
942 | } |
943 | ||
6746544c TH |
944 | /** |
945 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
946 | * @dev: target ATA device | |
947 | * | |
948 | * This function is called when @dev is about to be configured. | |
949 | * IDENTIFY data might have been modified after this hook is run. | |
950 | * | |
951 | * LOCKING: | |
952 | * EH context. | |
953 | * | |
954 | * RETURNS: | |
955 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
956 | * -errno on failure. | |
957 | */ | |
958 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
959 | { | |
9af5c9c9 TH |
960 | struct ata_port *ap = dev->link->ap; |
961 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 962 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 963 | int nr_executed = 0; |
6746544c TH |
964 | int rc; |
965 | ||
30dcf76a | 966 | if (!ata_dev_acpi_handle(dev)) |
6746544c TH |
967 | return 0; |
968 | ||
969 | /* do we need to do _GTF? */ | |
970 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
971 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
972 | return 0; | |
973 | ||
974 | /* do _SDD if SATA */ | |
975 | if (acpi_sata) { | |
976 | rc = ata_acpi_push_id(dev); | |
f2406770 | 977 | if (rc && rc != -ENOENT) |
6746544c TH |
978 | goto acpi_err; |
979 | } | |
980 | ||
981 | /* do _GTF */ | |
66fa7f21 TH |
982 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
983 | if (rc) | |
6746544c TH |
984 | goto acpi_err; |
985 | ||
986 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
987 | ||
988 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 989 | if (nr_executed) { |
6746544c TH |
990 | rc = ata_dev_reread_id(dev, 0); |
991 | if (rc < 0) { | |
a9a79dfe JP |
992 | ata_dev_err(dev, |
993 | "failed to IDENTIFY after ACPI commands\n"); | |
6746544c TH |
994 | return rc; |
995 | } | |
996 | } | |
997 | ||
998 | return 0; | |
999 | ||
1000 | acpi_err: | |
66fa7f21 TH |
1001 | /* ignore evaluation failure if we can continue safely */ |
1002 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1003 | return 0; | |
6746544c | 1004 | |
66fa7f21 TH |
1005 | /* fail and let EH retry once more for unknown IO errors */ |
1006 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1007 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1008 | return rc; | |
6746544c | 1009 | } |
66fa7f21 | 1010 | |
0d0cdb02 | 1011 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
a9a79dfe | 1012 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
66fa7f21 TH |
1013 | |
1014 | /* We can safely continue if no _GTF command has been executed | |
1015 | * and port is not frozen. | |
1016 | */ | |
1017 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
1018 | return 0; | |
1019 | ||
6746544c TH |
1020 | return rc; |
1021 | } | |
562f0c2d TH |
1022 | |
1023 | /** | |
1024 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1025 | * @dev: target ATA device | |
1026 | * | |
1027 | * This function is called when @dev is about to be disabled. | |
1028 | * | |
1029 | * LOCKING: | |
1030 | * EH context. | |
1031 | */ | |
1032 | void ata_acpi_on_disable(struct ata_device *dev) | |
1033 | { | |
398e0782 | 1034 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1035 | } |