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 | |
18e94a33 AL |
21 | /* |
22 | * The UUID is defined in the PCI Firmware Specification available here: | |
23 | * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf | |
24 | */ | |
25 | const u8 pci_acpi_dsm_uuid[] = { | |
26 | 0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d, | |
27 | 0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d | |
28 | }; | |
29 | ||
f4b57a3b JL |
30 | phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) |
31 | { | |
32 | acpi_status status = AE_NOT_EXIST; | |
33 | unsigned long long mcfg_addr; | |
34 | ||
35 | if (handle) | |
36 | status = acpi_evaluate_integer(handle, METHOD_NAME__CBA, | |
37 | NULL, &mcfg_addr); | |
38 | if (ACPI_FAILURE(status)) | |
39 | return 0; | |
40 | ||
41 | return (phys_addr_t)mcfg_addr; | |
42 | } | |
43 | ||
abbfec34 BH |
44 | static acpi_status decode_type0_hpx_record(union acpi_object *record, |
45 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
46 | { |
47 | int i; | |
48 | union acpi_object *fields = record->package.elements; | |
49 | u32 revision = fields[1].integer.value; | |
50 | ||
51 | switch (revision) { | |
52 | case 1: | |
53 | if (record->package.count != 6) | |
54 | return AE_ERROR; | |
55 | for (i = 2; i < 6; i++) | |
56 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
57 | return AE_ERROR; | |
58 | hpx->t0 = &hpx->type0_data; | |
59 | hpx->t0->revision = revision; | |
60 | hpx->t0->cache_line_size = fields[2].integer.value; | |
61 | hpx->t0->latency_timer = fields[3].integer.value; | |
62 | hpx->t0->enable_serr = fields[4].integer.value; | |
63 | hpx->t0->enable_perr = fields[5].integer.value; | |
64 | break; | |
65 | default: | |
66 | printk(KERN_WARNING | |
67 | "%s: Type 0 Revision %d record not supported\n", | |
68 | __func__, revision); | |
69 | return AE_ERROR; | |
70 | } | |
71 | return AE_OK; | |
72 | } | |
73 | ||
abbfec34 BH |
74 | static acpi_status decode_type1_hpx_record(union acpi_object *record, |
75 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
76 | { |
77 | int i; | |
78 | union acpi_object *fields = record->package.elements; | |
79 | u32 revision = fields[1].integer.value; | |
80 | ||
81 | switch (revision) { | |
82 | case 1: | |
83 | if (record->package.count != 5) | |
84 | return AE_ERROR; | |
85 | for (i = 2; i < 5; i++) | |
86 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
87 | return AE_ERROR; | |
88 | hpx->t1 = &hpx->type1_data; | |
89 | hpx->t1->revision = revision; | |
90 | hpx->t1->max_mem_read = fields[2].integer.value; | |
91 | hpx->t1->avg_max_split = fields[3].integer.value; | |
92 | hpx->t1->tot_max_split = fields[4].integer.value; | |
93 | break; | |
94 | default: | |
95 | printk(KERN_WARNING | |
96 | "%s: Type 1 Revision %d record not supported\n", | |
97 | __func__, revision); | |
98 | return AE_ERROR; | |
99 | } | |
100 | return AE_OK; | |
101 | } | |
102 | ||
abbfec34 BH |
103 | static acpi_status decode_type2_hpx_record(union acpi_object *record, |
104 | struct hotplug_params *hpx) | |
9ce90ea5 BH |
105 | { |
106 | int i; | |
107 | union acpi_object *fields = record->package.elements; | |
108 | u32 revision = fields[1].integer.value; | |
109 | ||
110 | switch (revision) { | |
111 | case 1: | |
112 | if (record->package.count != 18) | |
113 | return AE_ERROR; | |
114 | for (i = 2; i < 18; i++) | |
115 | if (fields[i].type != ACPI_TYPE_INTEGER) | |
116 | return AE_ERROR; | |
117 | hpx->t2 = &hpx->type2_data; | |
118 | hpx->t2->revision = revision; | |
119 | hpx->t2->unc_err_mask_and = fields[2].integer.value; | |
120 | hpx->t2->unc_err_mask_or = fields[3].integer.value; | |
121 | hpx->t2->unc_err_sever_and = fields[4].integer.value; | |
122 | hpx->t2->unc_err_sever_or = fields[5].integer.value; | |
123 | hpx->t2->cor_err_mask_and = fields[6].integer.value; | |
124 | hpx->t2->cor_err_mask_or = fields[7].integer.value; | |
125 | hpx->t2->adv_err_cap_and = fields[8].integer.value; | |
126 | hpx->t2->adv_err_cap_or = fields[9].integer.value; | |
127 | hpx->t2->pci_exp_devctl_and = fields[10].integer.value; | |
128 | hpx->t2->pci_exp_devctl_or = fields[11].integer.value; | |
129 | hpx->t2->pci_exp_lnkctl_and = fields[12].integer.value; | |
130 | hpx->t2->pci_exp_lnkctl_or = fields[13].integer.value; | |
131 | hpx->t2->sec_unc_err_sever_and = fields[14].integer.value; | |
132 | hpx->t2->sec_unc_err_sever_or = fields[15].integer.value; | |
133 | hpx->t2->sec_unc_err_mask_and = fields[16].integer.value; | |
134 | hpx->t2->sec_unc_err_mask_or = fields[17].integer.value; | |
135 | break; | |
136 | default: | |
137 | printk(KERN_WARNING | |
138 | "%s: Type 2 Revision %d record not supported\n", | |
139 | __func__, revision); | |
140 | return AE_ERROR; | |
141 | } | |
142 | return AE_OK; | |
143 | } | |
144 | ||
abbfec34 | 145 | static acpi_status acpi_run_hpx(acpi_handle handle, struct hotplug_params *hpx) |
9ce90ea5 BH |
146 | { |
147 | acpi_status status; | |
148 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
149 | union acpi_object *package, *record, *fields; | |
150 | u32 type; | |
151 | int i; | |
152 | ||
153 | /* Clear the return buffer with zeros */ | |
154 | memset(hpx, 0, sizeof(struct hotplug_params)); | |
155 | ||
156 | status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer); | |
157 | if (ACPI_FAILURE(status)) | |
158 | return status; | |
159 | ||
160 | package = (union acpi_object *)buffer.pointer; | |
161 | if (package->type != ACPI_TYPE_PACKAGE) { | |
162 | status = AE_ERROR; | |
163 | goto exit; | |
164 | } | |
165 | ||
166 | for (i = 0; i < package->package.count; i++) { | |
167 | record = &package->package.elements[i]; | |
168 | if (record->type != ACPI_TYPE_PACKAGE) { | |
169 | status = AE_ERROR; | |
170 | goto exit; | |
171 | } | |
172 | ||
173 | fields = record->package.elements; | |
174 | if (fields[0].type != ACPI_TYPE_INTEGER || | |
175 | fields[1].type != ACPI_TYPE_INTEGER) { | |
176 | status = AE_ERROR; | |
177 | goto exit; | |
178 | } | |
179 | ||
180 | type = fields[0].integer.value; | |
181 | switch (type) { | |
182 | case 0: | |
183 | status = decode_type0_hpx_record(record, hpx); | |
184 | if (ACPI_FAILURE(status)) | |
185 | goto exit; | |
186 | break; | |
187 | case 1: | |
188 | status = decode_type1_hpx_record(record, hpx); | |
189 | if (ACPI_FAILURE(status)) | |
190 | goto exit; | |
191 | break; | |
192 | case 2: | |
193 | status = decode_type2_hpx_record(record, hpx); | |
194 | if (ACPI_FAILURE(status)) | |
195 | goto exit; | |
196 | break; | |
197 | default: | |
198 | printk(KERN_ERR "%s: Type %d record not supported\n", | |
199 | __func__, type); | |
200 | status = AE_ERROR; | |
201 | goto exit; | |
202 | } | |
203 | } | |
204 | exit: | |
205 | kfree(buffer.pointer); | |
206 | return status; | |
207 | } | |
208 | ||
abbfec34 | 209 | static acpi_status acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp) |
9ce90ea5 BH |
210 | { |
211 | acpi_status status; | |
212 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
213 | union acpi_object *package, *fields; | |
214 | int i; | |
215 | ||
216 | memset(hpp, 0, sizeof(struct hotplug_params)); | |
217 | ||
218 | status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer); | |
219 | if (ACPI_FAILURE(status)) | |
220 | return status; | |
221 | ||
222 | package = (union acpi_object *) buffer.pointer; | |
223 | if (package->type != ACPI_TYPE_PACKAGE || | |
224 | package->package.count != 4) { | |
225 | status = AE_ERROR; | |
226 | goto exit; | |
227 | } | |
228 | ||
229 | fields = package->package.elements; | |
230 | for (i = 0; i < 4; i++) { | |
231 | if (fields[i].type != ACPI_TYPE_INTEGER) { | |
232 | status = AE_ERROR; | |
233 | goto exit; | |
234 | } | |
235 | } | |
236 | ||
237 | hpp->t0 = &hpp->type0_data; | |
238 | hpp->t0->revision = 1; | |
239 | hpp->t0->cache_line_size = fields[0].integer.value; | |
240 | hpp->t0->latency_timer = fields[1].integer.value; | |
241 | hpp->t0->enable_serr = fields[2].integer.value; | |
242 | hpp->t0->enable_perr = fields[3].integer.value; | |
243 | ||
244 | exit: | |
245 | kfree(buffer.pointer); | |
246 | return status; | |
247 | } | |
248 | ||
249 | /* pci_get_hp_params | |
250 | * | |
251 | * @dev - the pci_dev for which we want parameters | |
252 | * @hpp - allocated by the caller | |
253 | */ | |
254 | int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp) | |
255 | { | |
256 | acpi_status status; | |
257 | acpi_handle handle, phandle; | |
258 | struct pci_bus *pbus; | |
259 | ||
260 | handle = NULL; | |
261 | for (pbus = dev->bus; pbus; pbus = pbus->parent) { | |
262 | handle = acpi_pci_get_bridge_handle(pbus); | |
263 | if (handle) | |
264 | break; | |
265 | } | |
266 | ||
267 | /* | |
268 | * _HPP settings apply to all child buses, until another _HPP is | |
269 | * encountered. If we don't find an _HPP for the input pci dev, | |
270 | * look for it in the parent device scope since that would apply to | |
271 | * this pci dev. | |
272 | */ | |
273 | while (handle) { | |
274 | status = acpi_run_hpx(handle, hpp); | |
275 | if (ACPI_SUCCESS(status)) | |
276 | return 0; | |
277 | status = acpi_run_hpp(handle, hpp); | |
278 | if (ACPI_SUCCESS(status)) | |
279 | return 0; | |
280 | if (acpi_is_root_bridge(handle)) | |
281 | break; | |
282 | status = acpi_get_parent(handle, &phandle); | |
283 | if (ACPI_FAILURE(status)) | |
284 | break; | |
285 | handle = phandle; | |
286 | } | |
287 | return -ENODEV; | |
288 | } | |
289 | EXPORT_SYMBOL_GPL(pci_get_hp_params); | |
290 | ||
5e3d2344 BH |
291 | /** |
292 | * pci_acpi_wake_bus - Root bus wakeup notification fork function. | |
293 | * @work: Work item to handle. | |
294 | */ | |
295 | static void pci_acpi_wake_bus(struct work_struct *work) | |
296 | { | |
297 | struct acpi_device *adev; | |
298 | struct acpi_pci_root *root; | |
299 | ||
300 | adev = container_of(work, struct acpi_device, wakeup.context.work); | |
301 | root = acpi_driver_data(adev); | |
302 | pci_pme_wakeup_bus(root->bus); | |
303 | } | |
304 | ||
305 | /** | |
306 | * pci_acpi_wake_dev - PCI device wakeup notification work function. | |
307 | * @handle: ACPI handle of a device the notification is for. | |
308 | * @work: Work item to handle. | |
309 | */ | |
310 | static void pci_acpi_wake_dev(struct work_struct *work) | |
311 | { | |
312 | struct acpi_device_wakeup_context *context; | |
313 | struct pci_dev *pci_dev; | |
314 | ||
315 | context = container_of(work, struct acpi_device_wakeup_context, work); | |
316 | pci_dev = to_pci_dev(context->dev); | |
317 | ||
318 | if (pci_dev->pme_poll) | |
319 | pci_dev->pme_poll = false; | |
320 | ||
321 | if (pci_dev->current_state == PCI_D3cold) { | |
322 | pci_wakeup_event(pci_dev); | |
323 | pm_runtime_resume(&pci_dev->dev); | |
324 | return; | |
325 | } | |
326 | ||
327 | /* Clear PME Status if set. */ | |
328 | if (pci_dev->pme_support) | |
329 | pci_check_pme_status(pci_dev); | |
330 | ||
331 | pci_wakeup_event(pci_dev); | |
332 | pm_runtime_resume(&pci_dev->dev); | |
333 | ||
ff0387c3 | 334 | pci_pme_wakeup_bus(pci_dev->subordinate); |
5e3d2344 BH |
335 | } |
336 | ||
337 | /** | |
338 | * pci_acpi_add_bus_pm_notifier - Register PM notifier for root PCI bus. | |
339 | * @dev: PCI root bridge ACPI device. | |
340 | */ | |
341 | acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev) | |
342 | { | |
343 | return acpi_add_pm_notifier(dev, NULL, pci_acpi_wake_bus); | |
344 | } | |
345 | ||
346 | /** | |
347 | * pci_acpi_add_pm_notifier - Register PM notifier for given PCI device. | |
348 | * @dev: ACPI device to add the notifier for. | |
349 | * @pci_dev: PCI device to check for the PME status if an event is signaled. | |
350 | */ | |
351 | acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev, | |
352 | struct pci_dev *pci_dev) | |
353 | { | |
354 | return acpi_add_pm_notifier(dev, &pci_dev->dev, pci_acpi_wake_dev); | |
355 | } | |
356 | ||
0f64474b DSL |
357 | /* |
358 | * _SxD returns the D-state with the highest power | |
359 | * (lowest D-state number) supported in the S-state "x". | |
360 | * | |
361 | * If the devices does not have a _PRW | |
362 | * (Power Resources for Wake) supporting system wakeup from "x" | |
363 | * then the OS is free to choose a lower power (higher number | |
364 | * D-state) than the return value from _SxD. | |
365 | * | |
366 | * But if _PRW is enabled at S-state "x", the OS | |
367 | * must not choose a power lower than _SxD -- | |
368 | * unless the device has an _SxW method specifying | |
369 | * the lowest power (highest D-state number) the device | |
370 | * may enter while still able to wake the system. | |
371 | * | |
372 | * ie. depending on global OS policy: | |
373 | * | |
374 | * if (_PRW at S-state x) | |
375 | * choose from highest power _SxD to lowest power _SxW | |
376 | * else // no _PRW at S-state x | |
f7625980 | 377 | * choose highest power _SxD or any lower power |
0f64474b DSL |
378 | */ |
379 | ||
8d2bdf49 | 380 | static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) |
0f64474b | 381 | { |
448bd857 | 382 | int acpi_state, d_max; |
0f64474b | 383 | |
448bd857 HY |
384 | if (pdev->no_d3cold) |
385 | d_max = ACPI_STATE_D3_HOT; | |
386 | else | |
387 | d_max = ACPI_STATE_D3_COLD; | |
388 | acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max); | |
ab826ca4 SL |
389 | if (acpi_state < 0) |
390 | return PCI_POWER_ERROR; | |
391 | ||
392 | switch (acpi_state) { | |
393 | case ACPI_STATE_D0: | |
394 | return PCI_D0; | |
395 | case ACPI_STATE_D1: | |
396 | return PCI_D1; | |
397 | case ACPI_STATE_D2: | |
398 | return PCI_D2; | |
1cc0c998 | 399 | case ACPI_STATE_D3_HOT: |
ab826ca4 | 400 | return PCI_D3hot; |
28c2103d LM |
401 | case ACPI_STATE_D3_COLD: |
402 | return PCI_D3cold; | |
ab826ca4 SL |
403 | } |
404 | return PCI_POWER_ERROR; | |
0f64474b | 405 | } |
961d9120 RW |
406 | |
407 | static bool acpi_pci_power_manageable(struct pci_dev *dev) | |
408 | { | |
85dbb3d0 RW |
409 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
410 | return adev ? acpi_device_power_manageable(adev) : false; | |
961d9120 | 411 | } |
0f64474b | 412 | |
b913100d DSL |
413 | static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |
414 | { | |
85dbb3d0 | 415 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
583c377f DB |
416 | static const u8 state_conv[] = { |
417 | [PCI_D0] = ACPI_STATE_D0, | |
418 | [PCI_D1] = ACPI_STATE_D1, | |
419 | [PCI_D2] = ACPI_STATE_D2, | |
fc6504b3 RW |
420 | [PCI_D3hot] = ACPI_STATE_D3_COLD, |
421 | [PCI_D3cold] = ACPI_STATE_D3_COLD, | |
b913100d | 422 | }; |
44e4e66e | 423 | int error = -EINVAL; |
b913100d | 424 | |
10b3dcae | 425 | /* If the ACPI device has _EJ0, ignore the device */ |
85dbb3d0 | 426 | if (!adev || acpi_has_method(adev->handle, "_EJ0")) |
44e4e66e | 427 | return -ENODEV; |
583c377f DB |
428 | |
429 | switch (state) { | |
8b713a88 RW |
430 | case PCI_D3cold: |
431 | if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) == | |
432 | PM_QOS_FLAGS_ALL) { | |
433 | error = -EBUSY; | |
434 | break; | |
435 | } | |
583c377f DB |
436 | case PCI_D0: |
437 | case PCI_D1: | |
438 | case PCI_D2: | |
439 | case PCI_D3hot: | |
85dbb3d0 | 440 | error = acpi_device_set_power(adev, state_conv[state]); |
583c377f | 441 | } |
44e4e66e RW |
442 | |
443 | if (!error) | |
d010e576 | 444 | dev_dbg(&dev->dev, "power state changed by ACPI to %s\n", |
fc6504b3 | 445 | acpi_power_state_string(state_conv[state])); |
44e4e66e RW |
446 | |
447 | return error; | |
b913100d DSL |
448 | } |
449 | ||
eb9d0fe4 RW |
450 | static bool acpi_pci_can_wakeup(struct pci_dev *dev) |
451 | { | |
85dbb3d0 RW |
452 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
453 | return adev ? acpi_device_can_wakeup(adev) : false; | |
eb9d0fe4 RW |
454 | } |
455 | ||
0baed8da RW |
456 | static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable) |
457 | { | |
458 | while (bus->parent) { | |
dc1a94ae | 459 | if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable)) |
0baed8da RW |
460 | return; |
461 | bus = bus->parent; | |
462 | } | |
463 | ||
464 | /* We have reached the root bus. */ | |
465 | if (bus->bridge) | |
466 | acpi_pm_device_sleep_wake(bus->bridge, enable); | |
467 | } | |
468 | ||
eb9d0fe4 RW |
469 | static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable) |
470 | { | |
0baed8da RW |
471 | if (acpi_pci_can_wakeup(dev)) |
472 | return acpi_pm_device_sleep_wake(&dev->dev, enable); | |
473 | ||
dc1a94ae | 474 | acpi_pci_propagate_wakeup_enable(dev->bus, enable); |
0baed8da | 475 | return 0; |
eb9d0fe4 RW |
476 | } |
477 | ||
b67ea761 RW |
478 | static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable) |
479 | { | |
480 | while (bus->parent) { | |
481 | struct pci_dev *bridge = bus->self; | |
482 | ||
483 | if (bridge->pme_interrupt) | |
484 | return; | |
b24e5098 | 485 | if (!acpi_pm_device_run_wake(&bridge->dev, enable)) |
b67ea761 RW |
486 | return; |
487 | bus = bus->parent; | |
488 | } | |
489 | ||
490 | /* We have reached the root bus. */ | |
491 | if (bus->bridge) | |
b24e5098 | 492 | acpi_pm_device_run_wake(bus->bridge, enable); |
b67ea761 RW |
493 | } |
494 | ||
495 | static int acpi_pci_run_wake(struct pci_dev *dev, bool enable) | |
496 | { | |
448bd857 HY |
497 | /* |
498 | * Per PCI Express Base Specification Revision 2.0 section | |
499 | * 5.3.3.2 Link Wakeup, platform support is needed for D3cold | |
500 | * waking up to power on the main link even if there is PME | |
501 | * support for D3cold | |
502 | */ | |
503 | if (dev->pme_interrupt && !dev->runtime_d3cold) | |
b67ea761 RW |
504 | return 0; |
505 | ||
b24e5098 | 506 | if (!acpi_pm_device_run_wake(&dev->dev, enable)) |
b67ea761 RW |
507 | return 0; |
508 | ||
509 | acpi_pci_propagate_run_wake(dev->bus, enable); | |
510 | return 0; | |
511 | } | |
512 | ||
bac2a909 RW |
513 | static bool acpi_pci_need_resume(struct pci_dev *dev) |
514 | { | |
515 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); | |
516 | ||
517 | if (!adev || !acpi_device_power_manageable(adev)) | |
518 | return false; | |
519 | ||
520 | if (device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count) | |
521 | return true; | |
522 | ||
523 | if (acpi_target_system_state() == ACPI_STATE_S0) | |
524 | return false; | |
525 | ||
526 | return !!adev->power.flags.dsw_present; | |
527 | } | |
528 | ||
961d9120 RW |
529 | static struct pci_platform_pm_ops acpi_pci_platform_pm = { |
530 | .is_manageable = acpi_pci_power_manageable, | |
531 | .set_state = acpi_pci_set_power_state, | |
532 | .choose_state = acpi_pci_choose_state, | |
eb9d0fe4 | 533 | .sleep_wake = acpi_pci_sleep_wake, |
b67ea761 | 534 | .run_wake = acpi_pci_run_wake, |
bac2a909 | 535 | .need_resume = acpi_pci_need_resume, |
961d9120 | 536 | }; |
b913100d | 537 | |
5090d4a6 JL |
538 | void acpi_pci_add_bus(struct pci_bus *bus) |
539 | { | |
be1c9de9 | 540 | if (acpi_pci_disabled || !bus->bridge) |
5090d4a6 JL |
541 | return; |
542 | ||
be1c9de9 RW |
543 | acpi_pci_slot_enumerate(bus); |
544 | acpiphp_enumerate_slots(bus); | |
5090d4a6 JL |
545 | } |
546 | ||
547 | void acpi_pci_remove_bus(struct pci_bus *bus) | |
548 | { | |
be1c9de9 | 549 | if (acpi_pci_disabled || !bus->bridge) |
5090d4a6 JL |
550 | return; |
551 | ||
3b63aaa7 | 552 | acpiphp_remove_slots(bus); |
5c0b04e3 | 553 | acpi_pci_slot_remove(bus); |
5090d4a6 JL |
554 | } |
555 | ||
84df749f | 556 | /* ACPI bus type */ |
e3f02c52 | 557 | static struct acpi_device *acpi_pci_find_companion(struct device *dev) |
84df749f | 558 | { |
60f75b8e | 559 | struct pci_dev *pci_dev = to_pci_dev(dev); |
5ce79d20 | 560 | bool check_children; |
60f75b8e | 561 | u64 addr; |
84df749f | 562 | |
6788a51f | 563 | check_children = pci_is_bridge(pci_dev); |
84df749f DSL |
564 | /* Please ref to ACPI spec for the syntax of _ADR */ |
565 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); | |
e3f02c52 | 566 | return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr, |
5ce79d20 | 567 | check_children); |
84df749f DSL |
568 | } |
569 | ||
38a9a67a | 570 | static void pci_acpi_setup(struct device *dev) |
d2e5f0c1 | 571 | { |
d2e5f0c1 | 572 | struct pci_dev *pci_dev = to_pci_dev(dev); |
f084280c | 573 | struct acpi_device *adev = ACPI_COMPANION(dev); |
38a9a67a | 574 | |
f084280c RW |
575 | if (!adev) |
576 | return; | |
577 | ||
578 | pci_acpi_add_pm_notifier(adev, pci_dev); | |
579 | if (!adev->wakeup.flags.valid) | |
d2e5f0c1 RW |
580 | return; |
581 | ||
582 | device_set_wakeup_capable(dev, true); | |
583 | acpi_pci_sleep_wake(pci_dev, false); | |
d2e5f0c1 RW |
584 | if (adev->wakeup.flags.run_wake) |
585 | device_set_run_wake(dev, true); | |
586 | } | |
587 | ||
38a9a67a | 588 | static void pci_acpi_cleanup(struct device *dev) |
d2e5f0c1 | 589 | { |
f084280c RW |
590 | struct acpi_device *adev = ACPI_COMPANION(dev); |
591 | ||
592 | if (!adev) | |
593 | return; | |
d2e5f0c1 | 594 | |
f084280c RW |
595 | pci_acpi_remove_pm_notifier(adev); |
596 | if (adev->wakeup.flags.valid) { | |
d2e5f0c1 RW |
597 | device_set_wakeup_capable(dev, false); |
598 | device_set_run_wake(dev, false); | |
d2e5f0c1 RW |
599 | } |
600 | } | |
601 | ||
53540098 RW |
602 | static bool pci_acpi_bus_match(struct device *dev) |
603 | { | |
40c368c1 | 604 | return dev_is_pci(dev); |
53540098 RW |
605 | } |
606 | ||
9c273b95 | 607 | static struct acpi_bus_type acpi_pci_bus = { |
53540098 RW |
608 | .name = "PCI", |
609 | .match = pci_acpi_bus_match, | |
e3f02c52 | 610 | .find_companion = acpi_pci_find_companion, |
38a9a67a RW |
611 | .setup = pci_acpi_setup, |
612 | .cleanup = pci_acpi_cleanup, | |
84df749f DSL |
613 | }; |
614 | ||
9c273b95 | 615 | static int __init acpi_pci_init(void) |
84df749f DSL |
616 | { |
617 | int ret; | |
618 | ||
993958fe | 619 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) { |
e7d45152 | 620 | pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n"); |
f8993aff SL |
621 | pci_no_msi(); |
622 | } | |
5fde244d | 623 | |
993958fe | 624 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
e7d45152 | 625 | pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n"); |
5fde244d SL |
626 | pcie_no_aspm(); |
627 | } | |
628 | ||
9c273b95 | 629 | ret = register_acpi_bus_type(&acpi_pci_bus); |
84df749f DSL |
630 | if (ret) |
631 | return 0; | |
5c0b04e3 | 632 | |
961d9120 | 633 | pci_set_platform_pm(&acpi_pci_platform_pm); |
5c0b04e3 | 634 | acpi_pci_slot_init(); |
3b63aaa7 | 635 | acpiphp_init(); |
5c0b04e3 | 636 | |
84df749f DSL |
637 | return 0; |
638 | } | |
9c273b95 | 639 | arch_initcall(acpi_pci_init); |