Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * File: pci-acpi.c | |
a406d9e6 | 3 | * Purpose: Provide PCI support in ACPI |
1da177e4 | 4 | * |
84df749f DSL |
5 | * Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com> |
6 | * Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com> | |
7 | * Copyright (C) 2004 Intel Corp. | |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/delay.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/pci.h> | |
9ce90ea5 | 13 | #include <linux/pci_hotplug.h> |
1da177e4 | 14 | #include <linux/module.h> |
5fde244d | 15 | #include <linux/pci-aspm.h> |
1da177e4 | 16 | #include <linux/pci-acpi.h> |
b67ea761 | 17 | #include <linux/pm_runtime.h> |
8b713a88 | 18 | #include <linux/pm_qos.h> |
0f64474b | 19 | #include "pci.h" |
1da177e4 | 20 | |
f4b57a3b JL |
21 | phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) |
22 | { | |
23 | acpi_status status = AE_NOT_EXIST; | |
24 | unsigned long long mcfg_addr; | |
25 | ||
26 | if (handle) | |
27 | status = acpi_evaluate_integer(handle, METHOD_NAME__CBA, | |
28 | NULL, &mcfg_addr); | |
29 | if (ACPI_FAILURE(status)) | |
30 | return 0; | |
31 | ||
32 | return (phys_addr_t)mcfg_addr; | |
33 | } | |
34 | ||
abbfec34 BH |
35 | static acpi_status decode_type0_hpx_record(union acpi_object *record, |
36 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
37 | { |
38 | int i; | |
39 | union acpi_object *fields = record->package.elements; | |
40 | u32 revision = fields[1].integer.value; | |
41 | ||
42 | switch (revision) { | |
43 | case 1: | |
44 | if (record->package.count != 6) | |
45 | return AE_ERROR; | |
46 | for (i = 2; i < 6; i++) | |
47 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
48 | return AE_ERROR; | |
49 | hpx->t0 = &hpx->type0_data; | |
50 | hpx->t0->revision = revision; | |
51 | hpx->t0->cache_line_size = fields[2].integer.value; | |
52 | hpx->t0->latency_timer = fields[3].integer.value; | |
53 | hpx->t0->enable_serr = fields[4].integer.value; | |
54 | hpx->t0->enable_perr = fields[5].integer.value; | |
55 | break; | |
56 | default: | |
57 | printk(KERN_WARNING | |
58 | "%s: Type 0 Revision %d record not supported\n", | |
59 | __func__, revision); | |
60 | return AE_ERROR; | |
61 | } | |
62 | return AE_OK; | |
63 | } | |
64 | ||
abbfec34 BH |
65 | static acpi_status decode_type1_hpx_record(union acpi_object *record, |
66 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
67 | { |
68 | int i; | |
69 | union acpi_object *fields = record->package.elements; | |
70 | u32 revision = fields[1].integer.value; | |
71 | ||
72 | switch (revision) { | |
73 | case 1: | |
74 | if (record->package.count != 5) | |
75 | return AE_ERROR; | |
76 | for (i = 2; i < 5; i++) | |
77 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
78 | return AE_ERROR; | |
79 | hpx->t1 = &hpx->type1_data; | |
80 | hpx->t1->revision = revision; | |
81 | hpx->t1->max_mem_read = fields[2].integer.value; | |
82 | hpx->t1->avg_max_split = fields[3].integer.value; | |
83 | hpx->t1->tot_max_split = fields[4].integer.value; | |
84 | break; | |
85 | default: | |
86 | printk(KERN_WARNING | |
87 | "%s: Type 1 Revision %d record not supported\n", | |
88 | __func__, revision); | |
89 | return AE_ERROR; | |
90 | } | |
91 | return AE_OK; | |
92 | } | |
93 | ||
abbfec34 BH |
94 | static acpi_status decode_type2_hpx_record(union acpi_object *record, |
95 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
96 | { |
97 | int i; | |
98 | union acpi_object *fields = record->package.elements; | |
99 | u32 revision = fields[1].integer.value; | |
100 | ||
101 | switch (revision) { | |
102 | case 1: | |
103 | if (record->package.count != 18) | |
104 | return AE_ERROR; | |
105 | for (i = 2; i < 18; i++) | |
106 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
107 | return AE_ERROR; | |
108 | hpx->t2 = &hpx->type2_data; | |
109 | hpx->t2->revision = revision; | |
110 | hpx->t2->unc_err_mask_and = fields[2].integer.value; | |
111 | hpx->t2->unc_err_mask_or = fields[3].integer.value; | |
112 | hpx->t2->unc_err_sever_and = fields[4].integer.value; | |
113 | hpx->t2->unc_err_sever_or = fields[5].integer.value; | |
114 | hpx->t2->cor_err_mask_and = fields[6].integer.value; | |
115 | hpx->t2->cor_err_mask_or = fields[7].integer.value; | |
116 | hpx->t2->adv_err_cap_and = fields[8].integer.value; | |
117 | hpx->t2->adv_err_cap_or = fields[9].integer.value; | |
118 | hpx->t2->pci_exp_devctl_and = fields[10].integer.value; | |
119 | hpx->t2->pci_exp_devctl_or = fields[11].integer.value; | |
120 | hpx->t2->pci_exp_lnkctl_and = fields[12].integer.value; | |
121 | hpx->t2->pci_exp_lnkctl_or = fields[13].integer.value; | |
122 | hpx->t2->sec_unc_err_sever_and = fields[14].integer.value; | |
123 | hpx->t2->sec_unc_err_sever_or = fields[15].integer.value; | |
124 | hpx->t2->sec_unc_err_mask_and = fields[16].integer.value; | |
125 | hpx->t2->sec_unc_err_mask_or = fields[17].integer.value; | |
126 | break; | |
127 | default: | |
128 | printk(KERN_WARNING | |
129 | "%s: Type 2 Revision %d record not supported\n", | |
130 | __func__, revision); | |
131 | return AE_ERROR; | |
132 | } | |
133 | return AE_OK; | |
134 | } | |
135 | ||
abbfec34 | 136 | static acpi_status acpi_run_hpx(acpi_handle handle, struct hotplug_params *hpx) |
9ce90ea5 BH |
137 | { |
138 | acpi_status status; | |
139 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
140 | union acpi_object *package, *record, *fields; | |
141 | u32 type; | |
142 | int i; | |
143 | ||
144 | /* Clear the return buffer with zeros */ | |
145 | memset(hpx, 0, sizeof(struct hotplug_params)); | |
146 | ||
147 | status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer); | |
148 | if (ACPI_FAILURE(status)) | |
149 | return status; | |
150 | ||
151 | package = (union acpi_object *)buffer.pointer; | |
152 | if (package->type != ACPI_TYPE_PACKAGE) { | |
153 | status = AE_ERROR; | |
154 | goto exit; | |
155 | } | |
156 | ||
157 | for (i = 0; i < package->package.count; i++) { | |
158 | record = &package->package.elements[i]; | |
159 | if (record->type != ACPI_TYPE_PACKAGE) { | |
160 | status = AE_ERROR; | |
161 | goto exit; | |
162 | } | |
163 | ||
164 | fields = record->package.elements; | |
165 | if (fields[0].type != ACPI_TYPE_INTEGER || | |
166 | fields[1].type != ACPI_TYPE_INTEGER) { | |
167 | status = AE_ERROR; | |
168 | goto exit; | |
169 | } | |
170 | ||
171 | type = fields[0].integer.value; | |
172 | switch (type) { | |
173 | case 0: | |
174 | status = decode_type0_hpx_record(record, hpx); | |
175 | if (ACPI_FAILURE(status)) | |
176 | goto exit; | |
177 | break; | |
178 | case 1: | |
179 | status = decode_type1_hpx_record(record, hpx); | |
180 | if (ACPI_FAILURE(status)) | |
181 | goto exit; | |
182 | break; | |
183 | case 2: | |
184 | status = decode_type2_hpx_record(record, hpx); | |
185 | if (ACPI_FAILURE(status)) | |
186 | goto exit; | |
187 | break; | |
188 | default: | |
189 | printk(KERN_ERR "%s: Type %d record not supported\n", | |
190 | __func__, type); | |
191 | status = AE_ERROR; | |
192 | goto exit; | |
193 | } | |
194 | } | |
195 | exit: | |
196 | kfree(buffer.pointer); | |
197 | return status; | |
198 | } | |
199 | ||
abbfec34 | 200 | static acpi_status acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp) |
9ce90ea5 BH |
201 | { |
202 | acpi_status status; | |
203 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
204 | union acpi_object *package, *fields; | |
205 | int i; | |
206 | ||
207 | memset(hpp, 0, sizeof(struct hotplug_params)); | |
208 | ||
209 | status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer); | |
210 | if (ACPI_FAILURE(status)) | |
211 | return status; | |
212 | ||
213 | package = (union acpi_object *) buffer.pointer; | |
214 | if (package->type != ACPI_TYPE_PACKAGE || | |
215 | package->package.count != 4) { | |
216 | status = AE_ERROR; | |
217 | goto exit; | |
218 | } | |
219 | ||
220 | fields = package->package.elements; | |
221 | for (i = 0; i < 4; i++) { | |
222 | if (fields[i].type != ACPI_TYPE_INTEGER) { | |
223 | status = AE_ERROR; | |
224 | goto exit; | |
225 | } | |
226 | } | |
227 | ||
228 | hpp->t0 = &hpp->type0_data; | |
229 | hpp->t0->revision = 1; | |
230 | hpp->t0->cache_line_size = fields[0].integer.value; | |
231 | hpp->t0->latency_timer = fields[1].integer.value; | |
232 | hpp->t0->enable_serr = fields[2].integer.value; | |
233 | hpp->t0->enable_perr = fields[3].integer.value; | |
234 | ||
235 | exit: | |
236 | kfree(buffer.pointer); | |
237 | return status; | |
238 | } | |
239 | ||
240 | /* pci_get_hp_params | |
241 | * | |
242 | * @dev - the pci_dev for which we want parameters | |
243 | * @hpp - allocated by the caller | |
244 | */ | |
245 | int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp) | |
246 | { | |
247 | acpi_status status; | |
248 | acpi_handle handle, phandle; | |
249 | struct pci_bus *pbus; | |
250 | ||
251 | handle = NULL; | |
252 | for (pbus = dev->bus; pbus; pbus = pbus->parent) { | |
253 | handle = acpi_pci_get_bridge_handle(pbus); | |
254 | if (handle) | |
255 | break; | |
256 | } | |
257 | ||
258 | /* | |
259 | * _HPP settings apply to all child buses, until another _HPP is | |
260 | * encountered. If we don't find an _HPP for the input pci dev, | |
261 | * look for it in the parent device scope since that would apply to | |
262 | * this pci dev. | |
263 | */ | |
264 | while (handle) { | |
265 | status = acpi_run_hpx(handle, hpp); | |
266 | if (ACPI_SUCCESS(status)) | |
267 | return 0; | |
268 | status = acpi_run_hpp(handle, hpp); | |
269 | if (ACPI_SUCCESS(status)) | |
270 | return 0; | |
271 | if (acpi_is_root_bridge(handle)) | |
272 | break; | |
273 | status = acpi_get_parent(handle, &phandle); | |
274 | if (ACPI_FAILURE(status)) | |
275 | break; | |
276 | handle = phandle; | |
277 | } | |
278 | return -ENODEV; | |
279 | } | |
280 | EXPORT_SYMBOL_GPL(pci_get_hp_params); | |
281 | ||
5e3d2344 BH |
282 | /** |
283 | * pci_acpi_wake_bus - Root bus wakeup notification fork function. | |
284 | * @work: Work item to handle. | |
285 | */ | |
286 | static void pci_acpi_wake_bus(struct work_struct *work) | |
287 | { | |
288 | struct acpi_device *adev; | |
289 | struct acpi_pci_root *root; | |
290 | ||
291 | adev = container_of(work, struct acpi_device, wakeup.context.work); | |
292 | root = acpi_driver_data(adev); | |
293 | pci_pme_wakeup_bus(root->bus); | |
294 | } | |
295 | ||
296 | /** | |
297 | * pci_acpi_wake_dev - PCI device wakeup notification work function. | |
298 | * @handle: ACPI handle of a device the notification is for. | |
299 | * @work: Work item to handle. | |
300 | */ | |
301 | static void pci_acpi_wake_dev(struct work_struct *work) | |
302 | { | |
303 | struct acpi_device_wakeup_context *context; | |
304 | struct pci_dev *pci_dev; | |
305 | ||
306 | context = container_of(work, struct acpi_device_wakeup_context, work); | |
307 | pci_dev = to_pci_dev(context->dev); | |
308 | ||
309 | if (pci_dev->pme_poll) | |
310 | pci_dev->pme_poll = false; | |
311 | ||
312 | if (pci_dev->current_state == PCI_D3cold) { | |
313 | pci_wakeup_event(pci_dev); | |
314 | pm_runtime_resume(&pci_dev->dev); | |
315 | return; | |
316 | } | |
317 | ||
318 | /* Clear PME Status if set. */ | |
319 | if (pci_dev->pme_support) | |
320 | pci_check_pme_status(pci_dev); | |
321 | ||
322 | pci_wakeup_event(pci_dev); | |
323 | pm_runtime_resume(&pci_dev->dev); | |
324 | ||
ff0387c3 | 325 | pci_pme_wakeup_bus(pci_dev->subordinate); |
5e3d2344 BH |
326 | } |
327 | ||
328 | /** | |
329 | * pci_acpi_add_bus_pm_notifier - Register PM notifier for root PCI bus. | |
330 | * @dev: PCI root bridge ACPI device. | |
331 | */ | |
332 | acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev) | |
333 | { | |
334 | return acpi_add_pm_notifier(dev, NULL, pci_acpi_wake_bus); | |
335 | } | |
336 | ||
337 | /** | |
338 | * pci_acpi_add_pm_notifier - Register PM notifier for given PCI device. | |
339 | * @dev: ACPI device to add the notifier for. | |
340 | * @pci_dev: PCI device to check for the PME status if an event is signaled. | |
341 | */ | |
342 | acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev, | |
343 | struct pci_dev *pci_dev) | |
344 | { | |
345 | return acpi_add_pm_notifier(dev, &pci_dev->dev, pci_acpi_wake_dev); | |
346 | } | |
347 | ||
0f64474b DSL |
348 | /* |
349 | * _SxD returns the D-state with the highest power | |
350 | * (lowest D-state number) supported in the S-state "x". | |
351 | * | |
352 | * If the devices does not have a _PRW | |
353 | * (Power Resources for Wake) supporting system wakeup from "x" | |
354 | * then the OS is free to choose a lower power (higher number | |
355 | * D-state) than the return value from _SxD. | |
356 | * | |
357 | * But if _PRW is enabled at S-state "x", the OS | |
358 | * must not choose a power lower than _SxD -- | |
359 | * unless the device has an _SxW method specifying | |
360 | * the lowest power (highest D-state number) the device | |
361 | * may enter while still able to wake the system. | |
362 | * | |
363 | * ie. depending on global OS policy: | |
364 | * | |
365 | * if (_PRW at S-state x) | |
366 | * choose from highest power _SxD to lowest power _SxW | |
367 | * else // no _PRW at S-state x | |
f7625980 | 368 | * choose highest power _SxD or any lower power |
0f64474b DSL |
369 | */ |
370 | ||
8d2bdf49 | 371 | static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) |
0f64474b | 372 | { |
448bd857 | 373 | int acpi_state, d_max; |
0f64474b | 374 | |
448bd857 HY |
375 | if (pdev->no_d3cold) |
376 | d_max = ACPI_STATE_D3_HOT; | |
377 | else | |
378 | d_max = ACPI_STATE_D3_COLD; | |
379 | acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max); | |
ab826ca4 SL |
380 | if (acpi_state < 0) |
381 | return PCI_POWER_ERROR; | |
382 | ||
383 | switch (acpi_state) { | |
384 | case ACPI_STATE_D0: | |
385 | return PCI_D0; | |
386 | case ACPI_STATE_D1: | |
387 | return PCI_D1; | |
388 | case ACPI_STATE_D2: | |
389 | return PCI_D2; | |
1cc0c998 | 390 | case ACPI_STATE_D3_HOT: |
ab826ca4 | 391 | return PCI_D3hot; |
28c2103d LM |
392 | case ACPI_STATE_D3_COLD: |
393 | return PCI_D3cold; | |
ab826ca4 SL |
394 | } |
395 | return PCI_POWER_ERROR; | |
0f64474b | 396 | } |
961d9120 RW |
397 | |
398 | static bool acpi_pci_power_manageable(struct pci_dev *dev) | |
399 | { | |
85dbb3d0 RW |
400 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
401 | return adev ? acpi_device_power_manageable(adev) : false; | |
961d9120 | 402 | } |
0f64474b | 403 | |
b913100d DSL |
404 | static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |
405 | { | |
85dbb3d0 | 406 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
583c377f DB |
407 | static const u8 state_conv[] = { |
408 | [PCI_D0] = ACPI_STATE_D0, | |
409 | [PCI_D1] = ACPI_STATE_D1, | |
410 | [PCI_D2] = ACPI_STATE_D2, | |
fc6504b3 RW |
411 | [PCI_D3hot] = ACPI_STATE_D3_COLD, |
412 | [PCI_D3cold] = ACPI_STATE_D3_COLD, | |
b913100d | 413 | }; |
44e4e66e | 414 | int error = -EINVAL; |
b913100d | 415 | |
10b3dcae | 416 | /* If the ACPI device has _EJ0, ignore the device */ |
85dbb3d0 | 417 | if (!adev || acpi_has_method(adev->handle, "_EJ0")) |
44e4e66e | 418 | return -ENODEV; |
583c377f DB |
419 | |
420 | switch (state) { | |
8b713a88 RW |
421 | case PCI_D3cold: |
422 | if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) == | |
423 | PM_QOS_FLAGS_ALL) { | |
424 | error = -EBUSY; | |
425 | break; | |
426 | } | |
583c377f DB |
427 | case PCI_D0: |
428 | case PCI_D1: | |
429 | case PCI_D2: | |
430 | case PCI_D3hot: | |
85dbb3d0 | 431 | error = acpi_device_set_power(adev, state_conv[state]); |
583c377f | 432 | } |
44e4e66e RW |
433 | |
434 | if (!error) | |
d010e576 | 435 | dev_dbg(&dev->dev, "power state changed by ACPI to %s\n", |
fc6504b3 | 436 | acpi_power_state_string(state_conv[state])); |
44e4e66e RW |
437 | |
438 | return error; | |
b913100d DSL |
439 | } |
440 | ||
eb9d0fe4 RW |
441 | static bool acpi_pci_can_wakeup(struct pci_dev *dev) |
442 | { | |
85dbb3d0 RW |
443 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
444 | return adev ? acpi_device_can_wakeup(adev) : false; | |
eb9d0fe4 RW |
445 | } |
446 | ||
0baed8da RW |
447 | static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable) |
448 | { | |
449 | while (bus->parent) { | |
dc1a94ae | 450 | if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable)) |
0baed8da RW |
451 | return; |
452 | bus = bus->parent; | |
453 | } | |
454 | ||
455 | /* We have reached the root bus. */ | |
456 | if (bus->bridge) | |
457 | acpi_pm_device_sleep_wake(bus->bridge, enable); | |
458 | } | |
459 | ||
eb9d0fe4 RW |
460 | static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable) |
461 | { | |
0baed8da RW |
462 | if (acpi_pci_can_wakeup(dev)) |
463 | return acpi_pm_device_sleep_wake(&dev->dev, enable); | |
464 | ||
dc1a94ae | 465 | acpi_pci_propagate_wakeup_enable(dev->bus, enable); |
0baed8da | 466 | return 0; |
eb9d0fe4 RW |
467 | } |
468 | ||
b67ea761 RW |
469 | static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable) |
470 | { | |
471 | while (bus->parent) { | |
472 | struct pci_dev *bridge = bus->self; | |
473 | ||
474 | if (bridge->pme_interrupt) | |
475 | return; | |
b24e5098 | 476 | if (!acpi_pm_device_run_wake(&bridge->dev, enable)) |
b67ea761 RW |
477 | return; |
478 | bus = bus->parent; | |
479 | } | |
480 | ||
481 | /* We have reached the root bus. */ | |
482 | if (bus->bridge) | |
b24e5098 | 483 | acpi_pm_device_run_wake(bus->bridge, enable); |
b67ea761 RW |
484 | } |
485 | ||
486 | static int acpi_pci_run_wake(struct pci_dev *dev, bool enable) | |
487 | { | |
448bd857 HY |
488 | /* |
489 | * Per PCI Express Base Specification Revision 2.0 section | |
490 | * 5.3.3.2 Link Wakeup, platform support is needed for D3cold | |
491 | * waking up to power on the main link even if there is PME | |
492 | * support for D3cold | |
493 | */ | |
494 | if (dev->pme_interrupt && !dev->runtime_d3cold) | |
b67ea761 RW |
495 | return 0; |
496 | ||
b24e5098 | 497 | if (!acpi_pm_device_run_wake(&dev->dev, enable)) |
b67ea761 RW |
498 | return 0; |
499 | ||
500 | acpi_pci_propagate_run_wake(dev->bus, enable); | |
501 | return 0; | |
502 | } | |
503 | ||
961d9120 RW |
504 | static struct pci_platform_pm_ops acpi_pci_platform_pm = { |
505 | .is_manageable = acpi_pci_power_manageable, | |
506 | .set_state = acpi_pci_set_power_state, | |
507 | .choose_state = acpi_pci_choose_state, | |
eb9d0fe4 | 508 | .sleep_wake = acpi_pci_sleep_wake, |
b67ea761 | 509 | .run_wake = acpi_pci_run_wake, |
961d9120 | 510 | }; |
b913100d | 511 | |
5090d4a6 JL |
512 | void acpi_pci_add_bus(struct pci_bus *bus) |
513 | { | |
be1c9de9 | 514 | if (acpi_pci_disabled || !bus->bridge) |
5090d4a6 JL |
515 | return; |
516 | ||
be1c9de9 RW |
517 | acpi_pci_slot_enumerate(bus); |
518 | acpiphp_enumerate_slots(bus); | |
5090d4a6 JL |
519 | } |
520 | ||
521 | void acpi_pci_remove_bus(struct pci_bus *bus) | |
522 | { | |
be1c9de9 | 523 | if (acpi_pci_disabled || !bus->bridge) |
5090d4a6 JL |
524 | return; |
525 | ||
3b63aaa7 | 526 | acpiphp_remove_slots(bus); |
5c0b04e3 | 527 | acpi_pci_slot_remove(bus); |
5090d4a6 JL |
528 | } |
529 | ||
84df749f | 530 | /* ACPI bus type */ |
e3f02c52 | 531 | static struct acpi_device *acpi_pci_find_companion(struct device *dev) |
84df749f | 532 | { |
60f75b8e | 533 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5ce79d20 | 534 | bool check_children; |
60f75b8e | 535 | u64 addr; |
84df749f | 536 | |
6788a51f | 537 | check_children = pci_is_bridge(pci_dev); |
84df749f DSL |
538 | /* Please ref to ACPI spec for the syntax of _ADR */ |
539 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); | |
e3f02c52 | 540 | return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr, |
5ce79d20 | 541 | check_children); |
84df749f DSL |
542 | } |
543 | ||
38a9a67a | 544 | static void pci_acpi_setup(struct device *dev) |
d2e5f0c1 | 545 | { |
d2e5f0c1 | 546 | struct pci_dev *pci_dev = to_pci_dev(dev); |
f084280c | 547 | struct acpi_device *adev = ACPI_COMPANION(dev); |
38a9a67a | 548 | |
f084280c RW |
549 | if (!adev) |
550 | return; | |
551 | ||
552 | pci_acpi_add_pm_notifier(adev, pci_dev); | |
553 | if (!adev->wakeup.flags.valid) | |
d2e5f0c1 RW |
554 | return; |
555 | ||
556 | device_set_wakeup_capable(dev, true); | |
557 | acpi_pci_sleep_wake(pci_dev, false); | |
d2e5f0c1 RW |
558 | if (adev->wakeup.flags.run_wake) |
559 | device_set_run_wake(dev, true); | |
560 | } | |
561 | ||
38a9a67a | 562 | static void pci_acpi_cleanup(struct device *dev) |
d2e5f0c1 | 563 | { |
f084280c RW |
564 | struct acpi_device *adev = ACPI_COMPANION(dev); |
565 | ||
566 | if (!adev) | |
567 | return; | |
d2e5f0c1 | 568 | |
f084280c RW |
569 | pci_acpi_remove_pm_notifier(adev); |
570 | if (adev->wakeup.flags.valid) { | |
d2e5f0c1 RW |
571 | device_set_wakeup_capable(dev, false); |
572 | device_set_run_wake(dev, false); | |
d2e5f0c1 RW |
573 | } |
574 | } | |
575 | ||
53540098 RW |
576 | static bool pci_acpi_bus_match(struct device *dev) |
577 | { | |
40c368c1 | 578 | return dev_is_pci(dev); |
53540098 RW |
579 | } |
580 | ||
9c273b95 | 581 | static struct acpi_bus_type acpi_pci_bus = { |
53540098 RW |
582 | .name = "PCI", |
583 | .match = pci_acpi_bus_match, | |
e3f02c52 | 584 | .find_companion = acpi_pci_find_companion, |
38a9a67a RW |
585 | .setup = pci_acpi_setup, |
586 | .cleanup = pci_acpi_cleanup, | |
84df749f DSL |
587 | }; |
588 | ||
9c273b95 | 589 | static int __init acpi_pci_init(void) |
84df749f DSL |
590 | { |
591 | int ret; | |
592 | ||
993958fe | 593 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) { |
e7d45152 | 594 | pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n"); |
f8993aff SL |
595 | pci_no_msi(); |
596 | } | |
5fde244d | 597 | |
993958fe | 598 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
e7d45152 | 599 | pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n"); |
5fde244d SL |
600 | pcie_no_aspm(); |
601 | } | |
602 | ||
9c273b95 | 603 | ret = register_acpi_bus_type(&acpi_pci_bus); |
84df749f DSL |
604 | if (ret) |
605 | return 0; | |
5c0b04e3 | 606 | |
961d9120 | 607 | pci_set_platform_pm(&acpi_pci_platform_pm); |
5c0b04e3 | 608 | acpi_pci_slot_init(); |
3b63aaa7 | 609 | acpiphp_init(); |
5c0b04e3 | 610 | |
84df749f DSL |
611 | return 0; |
612 | } | |
9c273b95 | 613 | arch_initcall(acpi_pci_init); |