Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
11ef697b KCA |
2 | /* |
3 | * libata-acpi.c | |
4 | * Provides ACPI support for PATA/SATA. | |
5 | * | |
6 | * Copyright (C) 2006 Intel Corp. | |
7 | * Copyright (C) 2006 Randy Dunlap | |
8 | */ | |
9 | ||
3264a8d8 | 10 | #include <linux/module.h> |
11ef697b KCA |
11 | #include <linux/ata.h> |
12 | #include <linux/delay.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/acpi.h> | |
17 | #include <linux/libata.h> | |
18 | #include <linux/pci.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
3bd46600 | 20 | #include <linux/pm_runtime.h> |
237d8440 | 21 | #include <scsi/scsi_device.h> |
11ef697b KCA |
22 | #include "libata.h" |
23 | ||
110f66d2 | 24 | unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
3264a8d8 | 25 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
fa5b561c | 26 | MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)"); |
3264a8d8 | 27 | |
11ef697b | 28 | #define NO_PORT_MULT 0xffff |
2dcb407e | 29 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
30 | |
31 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
32 | struct ata_acpi_gtf { |
33 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
34 | } __packed; | |
11ef697b | 35 | |
398e0782 TH |
36 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
37 | { | |
38 | kfree(dev->gtf_cache); | |
39 | dev->gtf_cache = NULL; | |
40 | } | |
41 | ||
5d513205 RW |
42 | struct ata_acpi_hotplug_context { |
43 | struct acpi_hotplug_context hp; | |
44 | union { | |
45 | struct ata_port *ap; | |
46 | struct ata_device *dev; | |
47 | } data; | |
48 | }; | |
49 | ||
50 | #define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data) | |
51 | ||
30dcf76a MG |
52 | /** |
53 | * ata_dev_acpi_handle - provide the acpi_handle for an ata_device | |
f1bc1e4c | 54 | * @dev: the acpi_handle returned will correspond to this device |
30dcf76a MG |
55 | * |
56 | * Returns the acpi_handle for the ACPI namespace object corresponding to | |
57 | * the ata_device passed into the function, or NULL if no such object exists | |
f1bc1e4c | 58 | * or ACPI is disabled for this device due to consecutive errors. |
30dcf76a MG |
59 | */ |
60 | acpi_handle ata_dev_acpi_handle(struct ata_device *dev) | |
6b66d958 | 61 | { |
f1bc1e4c AL |
62 | return dev->flags & ATA_DFLAG_ACPI_DISABLED ? |
63 | NULL : ACPI_HANDLE(&dev->tdev); | |
11ef697b KCA |
64 | } |
65 | ||
664d080c HM |
66 | /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
67 | static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) | |
68 | { | |
69 | if (dev) | |
70 | dev->flags |= ATA_DFLAG_DETACH; | |
71 | else { | |
72 | struct ata_link *tlink; | |
73 | struct ata_device *tdev; | |
74 | ||
1eca4365 TH |
75 | ata_for_each_link(tlink, ap, EDGE) |
76 | ata_for_each_dev(tdev, tlink, ALL) | |
664d080c HM |
77 | tdev->flags |= ATA_DFLAG_DETACH; |
78 | } | |
79 | ||
80 | ata_port_schedule_eh(ap); | |
81 | } | |
82 | ||
83 | /** | |
84 | * ata_acpi_handle_hotplug - ACPI event handler backend | |
85 | * @ap: ATA port ACPI event occurred | |
86 | * @dev: ATA device ACPI event occurred (can be NULL) | |
87 | * @event: ACPI event which occurred | |
664d080c HM |
88 | * |
89 | * All ACPI bay / device realted events end up in this function. If | |
90 | * the event is port-wide @dev is NULL. If the event is specific to a | |
91 | * device, @dev points to it. | |
92 | * | |
93 | * Hotplug (as opposed to unplug) notification is always handled as | |
94 | * port-wide while unplug only kills the target device on device-wide | |
95 | * event. | |
96 | * | |
97 | * LOCKING: | |
98 | * ACPI notify handler context. May sleep. | |
99 | */ | |
100 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, | |
f730ae18 | 101 | u32 event) |
237d8440 | 102 | { |
664d080c | 103 | struct ata_eh_info *ehi = &ap->link.eh_info; |
233f1120 TH |
104 | int wait = 0; |
105 | unsigned long flags; | |
3c1e3896 | 106 | |
664d080c | 107 | spin_lock_irqsave(ap->lock, flags); |
f730ae18 SL |
108 | /* |
109 | * When dock driver calls into the routine, it will always use | |
110 | * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and | |
111 | * ACPI_NOTIFY_EJECT_REQUEST for remove | |
112 | */ | |
233f1120 TH |
113 | switch (event) { |
114 | case ACPI_NOTIFY_BUS_CHECK: | |
115 | case ACPI_NOTIFY_DEVICE_CHECK: | |
116 | ata_ehi_push_desc(ehi, "ACPI event"); | |
664d080c | 117 | |
f730ae18 SL |
118 | ata_ehi_hotplugged(ehi); |
119 | ata_port_freeze(ap); | |
664d080c HM |
120 | break; |
121 | case ACPI_NOTIFY_EJECT_REQUEST: | |
122 | ata_ehi_push_desc(ehi, "ACPI event"); | |
123 | ||
664d080c HM |
124 | ata_acpi_detach_device(ap, dev); |
125 | wait = 1; | |
126 | break; | |
237d8440 MG |
127 | } |
128 | ||
ae6c23c4 MG |
129 | spin_unlock_irqrestore(ap->lock, flags); |
130 | ||
f1bc1e4c | 131 | if (wait) |
ae6c23c4 | 132 | ata_port_wait_eh(ap); |
664d080c HM |
133 | } |
134 | ||
5d513205 | 135 | static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event) |
664d080c | 136 | { |
5d513205 | 137 | struct ata_device *dev = ata_hotplug_data(adev->hp).dev; |
f730ae18 | 138 | ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
5d513205 | 139 | return 0; |
664d080c HM |
140 | } |
141 | ||
5d513205 | 142 | static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event) |
664d080c | 143 | { |
5d513205 RW |
144 | ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event); |
145 | return 0; | |
237d8440 MG |
146 | } |
147 | ||
1253f7aa SL |
148 | static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
149 | u32 event) | |
150 | { | |
151 | struct kobject *kobj = NULL; | |
152 | char event_string[20]; | |
153 | char *envp[] = { event_string, NULL }; | |
154 | ||
155 | if (dev) { | |
156 | if (dev->sdev) | |
157 | kobj = &dev->sdev->sdev_gendev.kobj; | |
158 | } else | |
159 | kobj = &ap->dev->kobj; | |
160 | ||
161 | if (kobj) { | |
162 | snprintf(event_string, 20, "BAY_EVENT=%d", event); | |
163 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); | |
164 | } | |
165 | } | |
166 | ||
5d513205 | 167 | static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event) |
1253f7aa | 168 | { |
5d513205 | 169 | ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event); |
1253f7aa SL |
170 | } |
171 | ||
5d513205 | 172 | static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event) |
1253f7aa | 173 | { |
5d513205 | 174 | struct ata_device *dev = ata_hotplug_data(adev->hp).dev; |
1253f7aa SL |
175 | ata_acpi_uevent(dev->link->ap, dev, event); |
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); |
5d513205 RW |
182 | struct acpi_device *adev; |
183 | struct ata_acpi_hotplug_context *context; | |
44521527 | 184 | |
9c5ad36d | 185 | if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion) |
f1bc1e4c | 186 | return; |
44521527 | 187 | |
9c5ad36d | 188 | acpi_preset_companion(&ap->tdev, host_companion, ap->port_no); |
44521527 | 189 | |
f1bc1e4c AL |
190 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) |
191 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
44521527 | 192 | |
5d513205 RW |
193 | adev = ACPI_COMPANION(&ap->tdev); |
194 | if (!adev || adev->hp) | |
195 | return; | |
196 | ||
197 | context = kzalloc(sizeof(*context), GFP_KERNEL); | |
198 | if (!context) | |
199 | return; | |
200 | ||
201 | context->data.ap = ap; | |
202 | acpi_initialize_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock, | |
203 | ata_acpi_ap_uevent); | |
f1bc1e4c | 204 | } |
44521527 | 205 | |
f1bc1e4c AL |
206 | void ata_acpi_bind_dev(struct ata_device *dev) |
207 | { | |
208 | struct ata_port *ap = dev->link->ap; | |
9c5ad36d RW |
209 | struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev); |
210 | struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); | |
5d513205 RW |
211 | struct acpi_device *parent, *adev; |
212 | struct ata_acpi_hotplug_context *context; | |
f1bc1e4c AL |
213 | u64 adr; |
214 | ||
215 | /* | |
9c5ad36d RW |
216 | * For both sata/pata devices, host companion device is required. |
217 | * For pata device, port companion device is also required. | |
f1bc1e4c | 218 | */ |
9c5ad36d RW |
219 | if (libata_noacpi || !host_companion || |
220 | (!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_companion)) | |
f1bc1e4c AL |
221 | return; |
222 | ||
223 | if (ap->flags & ATA_FLAG_ACPI_SATA) { | |
224 | if (!sata_pmp_attached(ap)) | |
225 | adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
226 | else | |
227 | adr = SATA_ADR(ap->port_no, dev->link->pmp); | |
9c5ad36d | 228 | parent = host_companion; |
f1bc1e4c AL |
229 | } else { |
230 | adr = dev->devno; | |
9c5ad36d | 231 | parent = port_companion; |
44521527 | 232 | } |
f1bc1e4c | 233 | |
9c5ad36d | 234 | acpi_preset_companion(&dev->tdev, parent, adr); |
5d513205 RW |
235 | adev = ACPI_COMPANION(&dev->tdev); |
236 | if (!adev || adev->hp) | |
237 | return; | |
238 | ||
239 | context = kzalloc(sizeof(*context), GFP_KERNEL); | |
240 | if (!context) | |
241 | return; | |
f1bc1e4c | 242 | |
5d513205 RW |
243 | context->data.dev = dev; |
244 | acpi_initialize_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock, | |
245 | ata_acpi_dev_uevent); | |
44521527 AL |
246 | } |
247 | ||
562f0c2d TH |
248 | /** |
249 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
250 | * @host: target ATA host | |
251 | * | |
252 | * This function is called during driver detach after the whole host | |
253 | * is shut down. | |
254 | * | |
255 | * LOCKING: | |
256 | * EH context. | |
257 | */ | |
258 | void ata_acpi_dissociate(struct ata_host *host) | |
259 | { | |
c05e6ff0 TH |
260 | int i; |
261 | ||
262 | /* Restore initial _GTM values so that driver which attaches | |
263 | * afterward can use them too. | |
264 | */ | |
265 | for (i = 0; i < host->n_ports; i++) { | |
266 | struct ata_port *ap = host->ports[i]; | |
267 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
268 | ||
f1bc1e4c | 269 | if (ACPI_HANDLE(&ap->tdev) && gtm) |
c05e6ff0 TH |
270 | ata_acpi_stm(ap, gtm); |
271 | } | |
562f0c2d TH |
272 | } |
273 | ||
f1bc1e4c AL |
274 | /** |
275 | * ata_acpi_gtm - execute _GTM | |
276 | * @ap: target ATA port | |
277 | * @gtm: out parameter for _GTM result | |
278 | * | |
279 | * Evaluate _GTM and store the result in @gtm. | |
280 | * | |
281 | * LOCKING: | |
282 | * EH context. | |
283 | * | |
284 | * RETURNS: | |
285 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
286 | */ | |
287 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
64578a3d TH |
288 | { |
289 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
290 | union acpi_object *out_obj; | |
291 | acpi_status status; | |
292 | int rc = 0; | |
f1bc1e4c AL |
293 | acpi_handle handle = ACPI_HANDLE(&ap->tdev); |
294 | ||
295 | if (!handle) | |
296 | return -EINVAL; | |
64578a3d | 297 | |
d66af4df | 298 | status = acpi_evaluate_object(handle, "_GTM", NULL, &output); |
64578a3d TH |
299 | |
300 | rc = -ENOENT; | |
301 | if (status == AE_NOT_FOUND) | |
302 | goto out_free; | |
303 | ||
304 | rc = -EINVAL; | |
305 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
306 | ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
307 | status); | |
64578a3d TH |
308 | goto out_free; |
309 | } | |
310 | ||
311 | out_obj = output.pointer; | |
312 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
a9a79dfe JP |
313 | ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
314 | out_obj->type); | |
64578a3d TH |
315 | |
316 | goto out_free; | |
317 | } | |
318 | ||
319 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
a9a79dfe JP |
320 | ata_port_err(ap, "_GTM returned invalid length %d\n", |
321 | out_obj->buffer.length); | |
64578a3d TH |
322 | goto out_free; |
323 | } | |
324 | ||
325 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
326 | rc = 0; | |
327 | out_free: | |
328 | kfree(output.pointer); | |
329 | return rc; | |
330 | } | |
331 | ||
badff03d AC |
332 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
333 | ||
64578a3d TH |
334 | /** |
335 | * ata_acpi_stm - execute _STM | |
336 | * @ap: target ATA port | |
337 | * @stm: timing parameter to _STM | |
338 | * | |
339 | * Evaluate _STM with timing parameter @stm. | |
340 | * | |
341 | * LOCKING: | |
342 | * EH context. | |
343 | * | |
344 | * RETURNS: | |
345 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
346 | */ | |
0d02f0b2 | 347 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
348 | { |
349 | acpi_status status; | |
0d02f0b2 | 350 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
351 | struct acpi_object_list input; |
352 | union acpi_object in_params[3]; | |
353 | ||
354 | in_params[0].type = ACPI_TYPE_BUFFER; | |
355 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 356 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
357 | /* Buffers for id may need byteswapping ? */ |
358 | in_params[1].type = ACPI_TYPE_BUFFER; | |
359 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 360 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
361 | in_params[2].type = ACPI_TYPE_BUFFER; |
362 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 363 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
364 | |
365 | input.count = 3; | |
366 | input.pointer = in_params; | |
367 | ||
f1bc1e4c AL |
368 | status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM", |
369 | &input, NULL); | |
64578a3d TH |
370 | |
371 | if (status == AE_NOT_FOUND) | |
372 | return -ENOENT; | |
373 | if (ACPI_FAILURE(status)) { | |
a9a79dfe JP |
374 | ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
375 | status); | |
64578a3d TH |
376 | return -EINVAL; |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
badff03d AC |
381 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
382 | ||
11ef697b | 383 | /** |
4700c4bc | 384 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 385 | * @dev: target ATA device |
4700c4bc | 386 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
387 | * |
388 | * This applies to both PATA and SATA drives. | |
389 | * | |
390 | * The _GTF method has no input parameters. | |
391 | * It returns a variable number of register set values (registers | |
392 | * hex 1F1..1F7, taskfiles). | |
393 | * The <variable number> is not known in advance, so have ACPI-CA | |
394 | * allocate the buffer as needed and return it, then free it later. | |
395 | * | |
4700c4bc TH |
396 | * LOCKING: |
397 | * EH context. | |
398 | * | |
399 | * RETURNS: | |
66fa7f21 TH |
400 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
401 | * if _GTF is invalid. | |
11ef697b | 402 | */ |
398e0782 | 403 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 404 | { |
3a32a8e9 | 405 | acpi_status status; |
3a32a8e9 TH |
406 | struct acpi_buffer output; |
407 | union acpi_object *out_obj; | |
4700c4bc | 408 | int rc = 0; |
11ef697b | 409 | |
398e0782 TH |
410 | /* if _GTF is cached, use the cached value */ |
411 | if (dev->gtf_cache) { | |
412 | out_obj = dev->gtf_cache; | |
413 | goto done; | |
414 | } | |
415 | ||
4700c4bc TH |
416 | /* set up output buffer */ |
417 | output.length = ACPI_ALLOCATE_BUFFER; | |
418 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 419 | |
11ef697b | 420 | /* _GTF has no input parameters */ |
30dcf76a MG |
421 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
422 | &output); | |
398e0782 | 423 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 424 | |
11ef697b | 425 | if (ACPI_FAILURE(status)) { |
4700c4bc | 426 | if (status != AE_NOT_FOUND) { |
a9a79dfe JP |
427 | ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
428 | status); | |
66fa7f21 | 429 | rc = -EINVAL; |
4700c4bc TH |
430 | } |
431 | goto out_free; | |
11ef697b KCA |
432 | } |
433 | ||
434 | if (!output.length || !output.pointer) { | |
17a1e1be HR |
435 | ata_dev_dbg(dev, "Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
436 | (unsigned long long)output.length, | |
437 | output.pointer); | |
66fa7f21 | 438 | rc = -EINVAL; |
4700c4bc | 439 | goto out_free; |
11ef697b KCA |
440 | } |
441 | ||
11ef697b | 442 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
a9a79dfe JP |
443 | ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
444 | out_obj->type); | |
66fa7f21 | 445 | rc = -EINVAL; |
4700c4bc | 446 | goto out_free; |
11ef697b KCA |
447 | } |
448 | ||
4700c4bc | 449 | if (out_obj->buffer.length % REGS_PER_GTF) { |
a9a79dfe JP |
450 | ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
451 | out_obj->buffer.length); | |
66fa7f21 | 452 | rc = -EINVAL; |
4700c4bc | 453 | goto out_free; |
11ef697b KCA |
454 | } |
455 | ||
398e0782 | 456 | done: |
4700c4bc | 457 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
458 | if (gtf) { |
459 | *gtf = (void *)out_obj->buffer.pointer; | |
17a1e1be HR |
460 | ata_dev_dbg(dev, "returning gtf=%p, gtf_count=%d\n", |
461 | *gtf, rc); | |
398e0782 | 462 | } |
4700c4bc TH |
463 | return rc; |
464 | ||
465 | out_free: | |
398e0782 | 466 | ata_acpi_clear_gtf(dev); |
4700c4bc | 467 | return rc; |
11ef697b KCA |
468 | } |
469 | ||
7c77fa4d | 470 | /** |
c86a2a28 | 471 | * ata_acpi_gtm_xfermask - determine xfermode from GTM parameter |
7c77fa4d TH |
472 | * @dev: target device |
473 | * @gtm: GTM parameter to use | |
474 | * | |
475 | * Determine xfermask for @dev from @gtm. | |
476 | * | |
477 | * LOCKING: | |
478 | * None. | |
479 | * | |
480 | * RETURNS: | |
481 | * Determined xfermask. | |
482 | */ | |
f0a6d77b SS |
483 | unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, |
484 | const struct ata_acpi_gtm *gtm) | |
7c77fa4d | 485 | { |
f0a6d77b | 486 | unsigned int xfer_mask = 0; |
a0f79b92 TH |
487 | unsigned int type; |
488 | int unit; | |
489 | u8 mode; | |
7c77fa4d TH |
490 | |
491 | /* we always use the 0 slot for crap hardware */ | |
492 | unit = dev->devno; | |
493 | if (!(gtm->flags & 0x10)) | |
494 | unit = 0; | |
495 | ||
a0f79b92 TH |
496 | /* PIO */ |
497 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
498 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
499 | |
500 | /* See if we have MWDMA or UDMA data. We don't bother with | |
501 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
502 | * and our error changedown if it works is UDMA to PIO anyway. | |
503 | */ | |
a0f79b92 TH |
504 | if (!(gtm->flags & (1 << (2 * unit)))) |
505 | type = ATA_SHIFT_MWDMA; | |
506 | else | |
507 | type = ATA_SHIFT_UDMA; | |
508 | ||
509 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
510 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 511 | |
a0f79b92 | 512 | return xfer_mask; |
7c77fa4d TH |
513 | } |
514 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
515 | ||
e1ddb4b6 AC |
516 | /** |
517 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
518 | * @ap: Port to check | |
021ee9a6 | 519 | * @gtm: GTM data to use |
e1ddb4b6 | 520 | * |
021ee9a6 | 521 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 522 | */ |
021ee9a6 | 523 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 524 | { |
021ee9a6 TH |
525 | struct ata_device *dev; |
526 | ||
1eca4365 | 527 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
f0a6d77b | 528 | unsigned int xfer_mask, udma_mask; |
021ee9a6 | 529 | |
021ee9a6 TH |
530 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
531 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
532 | ||
533 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
534 | return 1; | |
535 | } | |
536 | ||
e1ddb4b6 AC |
537 | return 0; |
538 | } | |
e1ddb4b6 AC |
539 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
540 | ||
3264a8d8 TH |
541 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
542 | const struct ata_acpi_gtf *gtf, | |
543 | struct ata_taskfile *tf) | |
544 | { | |
545 | ata_tf_init(dev, tf); | |
546 | ||
547 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
548 | tf->protocol = ATA_PROT_NODATA; | |
efcef265 | 549 | tf->error = gtf->tf[0]; /* 0x1f1 */ |
3264a8d8 TH |
550 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ |
551 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
552 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
553 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
554 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
efcef265 | 555 | tf->status = gtf->tf[6]; /* 0x1f7 */ |
3264a8d8 TH |
556 | } |
557 | ||
110f66d2 TH |
558 | static int ata_acpi_filter_tf(struct ata_device *dev, |
559 | const struct ata_taskfile *tf, | |
3264a8d8 TH |
560 | const struct ata_taskfile *ptf) |
561 | { | |
110f66d2 | 562 | if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
3264a8d8 TH |
563 | /* libata doesn't use ACPI to configure transfer mode. |
564 | * It will only confuse device configuration. Skip. | |
565 | */ | |
566 | if (tf->command == ATA_CMD_SET_FEATURES && | |
567 | tf->feature == SETFEATURES_XFER) | |
568 | return 1; | |
569 | } | |
570 | ||
110f66d2 | 571 | if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
3264a8d8 TH |
572 | /* BIOS writers, sorry but we don't wanna lock |
573 | * features unless the user explicitly said so. | |
574 | */ | |
575 | ||
576 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
577 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
578 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
579 | return 1; | |
580 | ||
581 | /* SECURITY FREEZE LOCK */ | |
582 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
583 | return 1; | |
584 | ||
585 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
586 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
587 | tf->command == ATA_CMD_SET_MAX && | |
588 | (tf->feature == ATA_SET_MAX_LOCK || | |
589 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
590 | return 1; | |
591 | } | |
592 | ||
fa5b561c TH |
593 | if (tf->command == ATA_CMD_SET_FEATURES && |
594 | tf->feature == SETFEATURES_SATA_ENABLE) { | |
b344991a | 595 | /* inhibit enabling DIPM */ |
110f66d2 | 596 | if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
b344991a TH |
597 | tf->nsect == SATA_DIPM) |
598 | return 1; | |
fa5b561c TH |
599 | |
600 | /* inhibit FPDMA non-zero offset */ | |
110f66d2 | 601 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
fa5b561c TH |
602 | (tf->nsect == SATA_FPDMA_OFFSET || |
603 | tf->nsect == SATA_FPDMA_IN_ORDER)) | |
604 | return 1; | |
605 | ||
606 | /* inhibit FPDMA auto activation */ | |
110f66d2 | 607 | if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
fa5b561c TH |
608 | tf->nsect == SATA_FPDMA_AA) |
609 | return 1; | |
b344991a TH |
610 | } |
611 | ||
3264a8d8 TH |
612 | return 0; |
613 | } | |
614 | ||
11ef697b | 615 | /** |
0e8634bf | 616 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 617 | * @dev: target ATA device |
11ef697b | 618 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
c86a2a28 | 619 | * @prev_gtf: previous command |
11ef697b | 620 | * |
3696df30 | 621 | * Outputs ATA taskfile to standard ATA host controller. |
11ef697b KCA |
622 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
623 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
624 | * hob_lbal, hob_lbam, and hob_lbah. | |
625 | * | |
626 | * This function waits for idle (!BUSY and !DRQ) after writing | |
627 | * registers. If the control register has a new value, this | |
628 | * function also waits for idle after writing control and before | |
629 | * writing the remaining registers. | |
630 | * | |
4700c4bc TH |
631 | * LOCKING: |
632 | * EH context. | |
633 | * | |
634 | * RETURNS: | |
3264a8d8 TH |
635 | * 1 if command is executed successfully. 0 if ignored, rejected or |
636 | * filtered out, -errno on other errors. | |
11ef697b | 637 | */ |
0e8634bf | 638 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
639 | const struct ata_acpi_gtf *gtf, |
640 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 641 | { |
3264a8d8 TH |
642 | struct ata_taskfile *pptf = NULL; |
643 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 644 | unsigned int err_mask; |
6521148c | 645 | const char *descr; |
0e8634bf | 646 | int rc; |
fc16c25f | 647 | |
4700c4bc TH |
648 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
649 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
650 | && (gtf->tf[6] == 0)) | |
651 | return 0; | |
11ef697b | 652 | |
3264a8d8 TH |
653 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
654 | if (prev_gtf) { | |
655 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
656 | pptf = &ptf; | |
657 | } | |
658 | ||
d4520903 | 659 | descr = ata_get_cmd_name(tf.command); |
742bef47 | 660 | |
110f66d2 | 661 | if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
3264a8d8 TH |
662 | rtf = tf; |
663 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
664 | DMA_NONE, NULL, 0, 0); | |
665 | ||
666 | switch (err_mask) { | |
667 | case 0: | |
742bef47 HR |
668 | ata_dev_dbg(dev, |
669 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x" | |
670 | "(%s) succeeded\n", | |
671 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
672 | tf.lbam, tf.lbah, tf.device, descr); | |
3264a8d8 TH |
673 | rc = 1; |
674 | break; | |
675 | ||
676 | case AC_ERR_DEV: | |
742bef47 HR |
677 | ata_dev_info(dev, |
678 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x" | |
679 | "(%s) rejected by device (Stat=0x%02x Err=0x%02x)", | |
680 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
681 | tf.lbam, tf.lbah, tf.device, descr, | |
efcef265 | 682 | rtf.status, rtf.error); |
3264a8d8 TH |
683 | rc = 0; |
684 | break; | |
685 | ||
686 | default: | |
742bef47 HR |
687 | ata_dev_err(dev, |
688 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x" | |
689 | "(%s) failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
690 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
691 | tf.lbam, tf.lbah, tf.device, descr, | |
efcef265 | 692 | err_mask, rtf.status, rtf.error); |
3264a8d8 TH |
693 | rc = -EIO; |
694 | break; | |
695 | } | |
696 | } else { | |
742bef47 HR |
697 | ata_dev_info(dev, |
698 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x" | |
699 | "(%s) filtered out\n", | |
700 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
701 | tf.lbam, tf.lbah, tf.device, descr); | |
0e8634bf | 702 | rc = 0; |
4700c4bc | 703 | } |
0e8634bf | 704 | return rc; |
11ef697b KCA |
705 | } |
706 | ||
11ef697b KCA |
707 | /** |
708 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 709 | * @dev: target ATA device |
98a1708d | 710 | * @nr_executed: out parameter for the number of executed commands |
11ef697b | 711 | * |
98a1708d | 712 | * Evaluate _GTF and execute returned taskfiles. |
69b16a5f TH |
713 | * |
714 | * LOCKING: | |
715 | * EH context. | |
716 | * | |
717 | * RETURNS: | |
66fa7f21 TH |
718 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
719 | * -errno on other errors. | |
11ef697b | 720 | */ |
66fa7f21 | 721 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 722 | { |
3264a8d8 | 723 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
724 | int gtf_count, i, rc; |
725 | ||
726 | /* get taskfiles */ | |
66fa7f21 TH |
727 | rc = ata_dev_get_GTF(dev, >f); |
728 | if (rc < 0) | |
729 | return rc; | |
730 | gtf_count = rc; | |
6746544c TH |
731 | |
732 | /* execute them */ | |
3264a8d8 TH |
733 | for (i = 0; i < gtf_count; i++, gtf++) { |
734 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
735 | if (rc < 0) |
736 | break; | |
3264a8d8 | 737 | if (rc) { |
0e8634bf | 738 | (*nr_executed)++; |
3264a8d8 TH |
739 | pgtf = gtf; |
740 | } | |
11ef697b KCA |
741 | } |
742 | ||
398e0782 | 743 | ata_acpi_clear_gtf(dev); |
6746544c | 744 | |
0e8634bf TH |
745 | if (rc < 0) |
746 | return rc; | |
747 | return 0; | |
11ef697b KCA |
748 | } |
749 | ||
7ea1fbc2 KCA |
750 | /** |
751 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 752 | * @dev: target ATA device |
7ea1fbc2 KCA |
753 | * |
754 | * _SDD ACPI object: for SATA mode only | |
755 | * Must be after Identify (Packet) Device -- uses its data | |
756 | * ATM this function never returns a failure. It is an optional | |
757 | * method and if it fails for whatever reason, we should still | |
758 | * just keep going. | |
69b16a5f TH |
759 | * |
760 | * LOCKING: | |
761 | * EH context. | |
762 | * | |
763 | * RETURNS: | |
f2406770 | 764 | * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
7ea1fbc2 | 765 | */ |
6746544c | 766 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 767 | { |
9af5c9c9 | 768 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 TH |
769 | acpi_status status; |
770 | struct acpi_object_list input; | |
771 | union acpi_object in_params[1]; | |
7ea1fbc2 | 772 | |
17a1e1be HR |
773 | ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
774 | __func__, dev->devno, ap->port_no); | |
7ea1fbc2 | 775 | |
7ea1fbc2 KCA |
776 | /* Give the drive Identify data to the drive via the _SDD method */ |
777 | /* _SDD: set up input parameters */ | |
778 | input.count = 1; | |
779 | input.pointer = in_params; | |
780 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
781 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
782 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
783 | /* Output buffer: _SDD has no output */ |
784 | ||
785 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 786 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
30dcf76a MG |
787 | status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
788 | NULL); | |
3a32a8e9 | 789 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 | 790 | |
f2406770 TH |
791 | if (status == AE_NOT_FOUND) |
792 | return -ENOENT; | |
793 | ||
794 | if (ACPI_FAILURE(status)) { | |
a9a79dfe | 795 | ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
f2406770 TH |
796 | return -EIO; |
797 | } | |
7ea1fbc2 | 798 | |
f2406770 | 799 | return 0; |
6746544c TH |
800 | } |
801 | ||
802 | /** | |
803 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
804 | * @ap: target ATA port | |
805 | * | |
806 | * This function is called when @ap is resumed - right after port | |
807 | * itself is resumed but before any EH action is taken. | |
808 | * | |
809 | * LOCKING: | |
810 | * EH context. | |
811 | */ | |
812 | void ata_acpi_on_resume(struct ata_port *ap) | |
813 | { | |
c05e6ff0 | 814 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 815 | struct ata_device *dev; |
6746544c | 816 | |
f1bc1e4c | 817 | if (ACPI_HANDLE(&ap->tdev) && gtm) { |
398e0782 TH |
818 | /* _GTM valid */ |
819 | ||
820 | /* restore timing parameters */ | |
c05e6ff0 | 821 | ata_acpi_stm(ap, gtm); |
64578a3d | 822 | |
398e0782 TH |
823 | /* _GTF should immediately follow _STM so that it can |
824 | * use values set by _STM. Cache _GTF result and | |
825 | * schedule _GTF. | |
826 | */ | |
1eca4365 | 827 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 828 | ata_acpi_clear_gtf(dev); |
48feb3c4 | 829 | if (ata_dev_enabled(dev) && |
c75da205 | 830 | ata_dev_acpi_handle(dev) && |
48feb3c4 | 831 | ata_dev_get_GTF(dev, NULL) >= 0) |
398e0782 TH |
832 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
833 | } | |
834 | } else { | |
835 | /* SATA _GTF needs to be evaulated after _SDD and | |
836 | * there's no reason to evaluate IDE _GTF early | |
837 | * without _STM. Clear cache and schedule _GTF. | |
838 | */ | |
1eca4365 | 839 | ata_for_each_dev(dev, &ap->link, ALL) { |
398e0782 | 840 | ata_acpi_clear_gtf(dev); |
48feb3c4 SL |
841 | if (ata_dev_enabled(dev)) |
842 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
843 | } |
844 | } | |
7ea1fbc2 KCA |
845 | } |
846 | ||
a7ff60db | 847 | static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) |
21334205 AL |
848 | { |
849 | int d_max_in = ACPI_STATE_D3_COLD; | |
a7ff60db AL |
850 | if (!runtime) |
851 | goto out; | |
21334205 AL |
852 | |
853 | /* | |
854 | * For ATAPI, runtime D3 cold is only allowed | |
855 | * for ZPODD in zero power ready state | |
856 | */ | |
857 | if (dev->class == ATA_DEV_ATAPI && | |
858 | !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) | |
859 | d_max_in = ACPI_STATE_D3_HOT; | |
860 | ||
a7ff60db | 861 | out: |
f1bc1e4c | 862 | return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in); |
21334205 AL |
863 | } |
864 | ||
a7ff60db | 865 | static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
bd3adca5 | 866 | { |
a7ff60db | 867 | bool runtime = PMSG_IS_AUTO(state); |
bd3adca5 | 868 | struct ata_device *dev; |
febe53ba | 869 | acpi_handle handle; |
3bd46600 | 870 | int acpi_state; |
bd3adca5 | 871 | |
1eca4365 | 872 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
febe53ba | 873 | handle = ata_dev_acpi_handle(dev); |
3bd46600 LM |
874 | if (!handle) |
875 | continue; | |
876 | ||
a7ff60db AL |
877 | if (!(state.event & PM_EVENT_RESUME)) { |
878 | acpi_state = ata_acpi_choose_suspend_state(dev, runtime); | |
21334205 AL |
879 | if (acpi_state == ACPI_STATE_D0) |
880 | continue; | |
a7ff60db | 881 | if (runtime && zpodd_dev_enabled(dev) && |
21334205 AL |
882 | acpi_state == ACPI_STATE_D3_COLD) |
883 | zpodd_enable_run_wake(dev); | |
884 | acpi_bus_set_power(handle, acpi_state); | |
3bd46600 | 885 | } else { |
a7ff60db | 886 | if (runtime && zpodd_dev_enabled(dev)) |
21334205 | 887 | zpodd_disable_run_wake(dev); |
3bd46600 LM |
888 | acpi_bus_set_power(handle, ACPI_STATE_D0); |
889 | } | |
bd3adca5 | 890 | } |
a7ff60db | 891 | } |
febe53ba | 892 | |
a7ff60db AL |
893 | /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ |
894 | static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
895 | { | |
896 | struct ata_device *dev; | |
897 | acpi_handle port_handle; | |
898 | ||
f1bc1e4c | 899 | port_handle = ACPI_HANDLE(&ap->tdev); |
a7ff60db AL |
900 | if (!port_handle) |
901 | return; | |
902 | ||
903 | /* channel first and then drives for power on and vica versa | |
904 | for power off */ | |
905 | if (state.event & PM_EVENT_RESUME) | |
906 | acpi_bus_set_power(port_handle, ACPI_STATE_D0); | |
febe53ba | 907 | |
a7ff60db AL |
908 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
909 | acpi_handle dev_handle = ata_dev_acpi_handle(dev); | |
910 | if (!dev_handle) | |
911 | continue; | |
912 | ||
913 | acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? | |
8ad928d5 | 914 | ACPI_STATE_D0 : ACPI_STATE_D3_COLD); |
a7ff60db AL |
915 | } |
916 | ||
917 | if (!(state.event & PM_EVENT_RESUME)) | |
8ad928d5 | 918 | acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD); |
a7ff60db AL |
919 | } |
920 | ||
921 | /** | |
922 | * ata_acpi_set_state - set the port power state | |
923 | * @ap: target ATA port | |
924 | * @state: state, on/off | |
925 | * | |
926 | * This function sets a proper ACPI D state for the device on | |
927 | * system and runtime PM operations. | |
928 | */ | |
929 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
930 | { | |
931 | if (ap->flags & ATA_FLAG_ACPI_SATA) | |
932 | sata_acpi_set_state(ap, state); | |
933 | else | |
934 | pata_acpi_set_state(ap, state); | |
bd3adca5 SL |
935 | } |
936 | ||
6746544c TH |
937 | /** |
938 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
939 | * @dev: target ATA device | |
940 | * | |
941 | * This function is called when @dev is about to be configured. | |
942 | * IDENTIFY data might have been modified after this hook is run. | |
943 | * | |
944 | * LOCKING: | |
945 | * EH context. | |
946 | * | |
947 | * RETURNS: | |
948 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
949 | * -errno on failure. | |
950 | */ | |
951 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
952 | { | |
9af5c9c9 TH |
953 | struct ata_port *ap = dev->link->ap; |
954 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 955 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 956 | int nr_executed = 0; |
6746544c TH |
957 | int rc; |
958 | ||
30dcf76a | 959 | if (!ata_dev_acpi_handle(dev)) |
6746544c TH |
960 | return 0; |
961 | ||
962 | /* do we need to do _GTF? */ | |
963 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
964 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
965 | return 0; | |
966 | ||
967 | /* do _SDD if SATA */ | |
968 | if (acpi_sata) { | |
969 | rc = ata_acpi_push_id(dev); | |
f2406770 | 970 | if (rc && rc != -ENOENT) |
6746544c TH |
971 | goto acpi_err; |
972 | } | |
973 | ||
974 | /* do _GTF */ | |
66fa7f21 TH |
975 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
976 | if (rc) | |
6746544c TH |
977 | goto acpi_err; |
978 | ||
979 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
980 | ||
981 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 982 | if (nr_executed) { |
6746544c TH |
983 | rc = ata_dev_reread_id(dev, 0); |
984 | if (rc < 0) { | |
a9a79dfe JP |
985 | ata_dev_err(dev, |
986 | "failed to IDENTIFY after ACPI commands\n"); | |
6746544c TH |
987 | return rc; |
988 | } | |
989 | } | |
990 | ||
991 | return 0; | |
992 | ||
993 | acpi_err: | |
66fa7f21 | 994 | /* ignore evaluation failure if we can continue safely */ |
4cb7c6f1 | 995 | if (rc == -EINVAL && !nr_executed && !ata_port_is_frozen(ap)) |
66fa7f21 | 996 | return 0; |
6746544c | 997 | |
66fa7f21 TH |
998 | /* fail and let EH retry once more for unknown IO errors */ |
999 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
1000 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
1001 | return rc; | |
6746544c | 1002 | } |
66fa7f21 | 1003 | |
0d0cdb02 | 1004 | dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
a9a79dfe | 1005 | ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
66fa7f21 TH |
1006 | |
1007 | /* We can safely continue if no _GTF command has been executed | |
1008 | * and port is not frozen. | |
1009 | */ | |
4cb7c6f1 | 1010 | if (!nr_executed && !ata_port_is_frozen(ap)) |
66fa7f21 TH |
1011 | return 0; |
1012 | ||
6746544c TH |
1013 | return rc; |
1014 | } | |
562f0c2d TH |
1015 | |
1016 | /** | |
1017 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
1018 | * @dev: target ATA device | |
1019 | * | |
1020 | * This function is called when @dev is about to be disabled. | |
1021 | * | |
1022 | * LOCKING: | |
1023 | * EH context. | |
1024 | */ | |
1025 | void ata_acpi_on_disable(struct ata_device *dev) | |
1026 | { | |
398e0782 | 1027 | ata_acpi_clear_gtf(dev); |
562f0c2d | 1028 | } |