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1da177e4 LT |
1 | /* |
2 | * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
d0020f65 | 30 | #include <linux/mutex.h> |
1da177e4 | 31 | #include <linux/pm.h> |
b67ea761 | 32 | #include <linux/pm_runtime.h> |
1da177e4 | 33 | #include <linux/pci.h> |
990a7ac5 | 34 | #include <linux/pci-acpi.h> |
eca67315 | 35 | #include <linux/pci-aspm.h> |
1da177e4 | 36 | #include <linux/acpi.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 LT |
38 | #include <acpi/acpi_bus.h> |
39 | #include <acpi/acpi_drivers.h> | |
415e12b2 | 40 | #include <acpi/apei.h> |
1da177e4 | 41 | |
a192a958 LB |
42 | #define PREFIX "ACPI: " |
43 | ||
1da177e4 | 44 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 45 | ACPI_MODULE_NAME("pci_root"); |
1da177e4 | 46 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
1da177e4 | 47 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
4be44fcd LB |
48 | static int acpi_pci_root_add(struct acpi_device *device); |
49 | static int acpi_pci_root_remove(struct acpi_device *device, int type); | |
50 | static int acpi_pci_root_start(struct acpi_device *device); | |
1da177e4 | 51 | |
415e12b2 RW |
52 | #define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \ |
53 | | OSC_ACTIVE_STATE_PWR_SUPPORT \ | |
54 | | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \ | |
55 | | OSC_MSI_SUPPORT) | |
56 | ||
c97adf9e | 57 | static const struct acpi_device_id root_device_ids[] = { |
1ba90e3a TR |
58 | {"PNP0A03", 0}, |
59 | {"", 0}, | |
60 | }; | |
61 | MODULE_DEVICE_TABLE(acpi, root_device_ids); | |
62 | ||
1da177e4 | 63 | static struct acpi_driver acpi_pci_root_driver = { |
c2b6705b | 64 | .name = "pci_root", |
4be44fcd | 65 | .class = ACPI_PCI_ROOT_CLASS, |
1ba90e3a | 66 | .ids = root_device_ids, |
4be44fcd LB |
67 | .ops = { |
68 | .add = acpi_pci_root_add, | |
69 | .remove = acpi_pci_root_remove, | |
70 | .start = acpi_pci_root_start, | |
71 | }, | |
1da177e4 LT |
72 | }; |
73 | ||
d0020f65 TI |
74 | /* Lock to protect both acpi_pci_roots and acpi_pci_drivers lists */ |
75 | static DEFINE_MUTEX(acpi_pci_root_lock); | |
1da177e4 | 76 | static LIST_HEAD(acpi_pci_roots); |
8ee5bdf3 | 77 | static LIST_HEAD(acpi_pci_drivers); |
1da177e4 | 78 | |
63f10f0f | 79 | static DEFINE_MUTEX(osc_lock); |
1da177e4 LT |
80 | |
81 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) | |
82 | { | |
83 | int n = 0; | |
c1aec834 | 84 | struct acpi_pci_root *root; |
1da177e4 | 85 | |
d0020f65 | 86 | mutex_lock(&acpi_pci_root_lock); |
8ee5bdf3 | 87 | list_add_tail(&driver->node, &acpi_pci_drivers); |
d0020f65 TI |
88 | if (driver->add) |
89 | list_for_each_entry(root, &acpi_pci_roots, node) { | |
55bfe3c0 | 90 | driver->add(root); |
d0020f65 TI |
91 | n++; |
92 | } | |
93 | mutex_unlock(&acpi_pci_root_lock); | |
1da177e4 LT |
94 | |
95 | return n; | |
96 | } | |
97 | EXPORT_SYMBOL(acpi_pci_register_driver); | |
98 | ||
99 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) | |
100 | { | |
c1aec834 | 101 | struct acpi_pci_root *root; |
1da177e4 | 102 | |
d0020f65 | 103 | mutex_lock(&acpi_pci_root_lock); |
8ee5bdf3 | 104 | list_del(&driver->node); |
d0020f65 TI |
105 | if (driver->remove) |
106 | list_for_each_entry(root, &acpi_pci_roots, node) | |
55bfe3c0 | 107 | driver->remove(root); |
d0020f65 | 108 | mutex_unlock(&acpi_pci_root_lock); |
1da177e4 LT |
109 | } |
110 | EXPORT_SYMBOL(acpi_pci_unregister_driver); | |
111 | ||
d91a0078 JC |
112 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
113 | { | |
c1aec834 | 114 | struct acpi_pci_root *root; |
6507e6eb | 115 | acpi_handle handle = NULL; |
d91a0078 | 116 | |
6507e6eb | 117 | mutex_lock(&acpi_pci_root_lock); |
c1aec834 | 118 | list_for_each_entry(root, &acpi_pci_roots, node) |
6ad95513 | 119 | if ((root->segment == (u16) seg) && |
6507e6eb TI |
120 | (root->secondary.start == (u16) bus)) { |
121 | handle = root->device->handle; | |
122 | break; | |
123 | } | |
124 | mutex_unlock(&acpi_pci_root_lock); | |
125 | return handle; | |
d91a0078 JC |
126 | } |
127 | ||
128 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); | |
129 | ||
27558203 AC |
130 | /** |
131 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge | |
132 | * @handle - the ACPI CA node in question. | |
133 | * | |
134 | * Note: we could make this API take a struct acpi_device * instead, but | |
135 | * for now, it's more convenient to operate on an acpi_handle. | |
136 | */ | |
137 | int acpi_is_root_bridge(acpi_handle handle) | |
138 | { | |
139 | int ret; | |
140 | struct acpi_device *device; | |
141 | ||
142 | ret = acpi_bus_get_device(handle, &device); | |
143 | if (ret) | |
144 | return 0; | |
145 | ||
146 | ret = acpi_match_device_ids(device, root_device_ids); | |
147 | if (ret) | |
148 | return 0; | |
149 | else | |
150 | return 1; | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); | |
153 | ||
1da177e4 | 154 | static acpi_status |
4be44fcd | 155 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
1da177e4 | 156 | { |
6ad95513 | 157 | struct resource *res = data; |
1da177e4 LT |
158 | struct acpi_resource_address64 address; |
159 | ||
50eca3eb BM |
160 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
161 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && | |
162 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) | |
1da177e4 LT |
163 | return AE_OK; |
164 | ||
165 | acpi_resource_to_address64(resource, &address); | |
4be44fcd | 166 | if ((address.address_length > 0) && |
6ad95513 BH |
167 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
168 | res->start = address.minimum; | |
169 | res->end = address.minimum + address.address_length - 1; | |
170 | } | |
1da177e4 LT |
171 | |
172 | return AE_OK; | |
173 | } | |
174 | ||
f5eebbe1 | 175 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
6ad95513 | 176 | struct resource *res) |
1da177e4 LT |
177 | { |
178 | acpi_status status; | |
179 | ||
6ad95513 | 180 | res->start = -1; |
4be44fcd LB |
181 | status = |
182 | acpi_walk_resources(handle, METHOD_NAME__CRS, | |
6ad95513 | 183 | get_root_bridge_busnr_callback, res); |
1da177e4 LT |
184 | if (ACPI_FAILURE(status)) |
185 | return status; | |
6ad95513 | 186 | if (res->start == -1) |
1da177e4 LT |
187 | return AE_ERROR; |
188 | return AE_OK; | |
189 | } | |
190 | ||
2786f6e3 RZ |
191 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
192 | { | |
193 | int status; | |
194 | struct acpi_device *child = NULL; | |
195 | ||
196 | if (device->flags.bus_address) | |
197 | if (device->parent && device->parent->ops.bind) { | |
198 | status = device->parent->ops.bind(device); | |
199 | if (!status) { | |
200 | list_for_each_entry(child, &device->children, node) | |
201 | acpi_pci_bridge_scan(child); | |
202 | } | |
203 | } | |
204 | } | |
205 | ||
3a9622dc | 206 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
63f10f0f KK |
207 | |
208 | static acpi_status acpi_pci_run_osc(acpi_handle handle, | |
209 | const u32 *capbuf, u32 *retval) | |
210 | { | |
3a9622dc SL |
211 | struct acpi_osc_context context = { |
212 | .uuid_str = pci_osc_uuid_str, | |
213 | .rev = 1, | |
214 | .cap.length = 12, | |
215 | .cap.pointer = (void *)capbuf, | |
216 | }; | |
63f10f0f | 217 | acpi_status status; |
63f10f0f | 218 | |
3a9622dc SL |
219 | status = acpi_run_osc(handle, &context); |
220 | if (ACPI_SUCCESS(status)) { | |
221 | *retval = *((u32 *)(context.ret.pointer + 8)); | |
222 | kfree(context.ret.pointer); | |
63f10f0f | 223 | } |
63f10f0f KK |
224 | return status; |
225 | } | |
226 | ||
ab8e8957 RW |
227 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, |
228 | u32 support, | |
229 | u32 *control) | |
63f10f0f KK |
230 | { |
231 | acpi_status status; | |
ab8e8957 RW |
232 | u32 result, capbuf[3]; |
233 | ||
234 | support &= OSC_PCI_SUPPORT_MASKS; | |
235 | support |= root->osc_support_set; | |
63f10f0f | 236 | |
63f10f0f | 237 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
ab8e8957 RW |
238 | capbuf[OSC_SUPPORT_TYPE] = support; |
239 | if (control) { | |
240 | *control &= OSC_PCI_CONTROL_MASKS; | |
241 | capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; | |
242 | } else { | |
243 | /* Run _OSC query for all possible controls. */ | |
244 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; | |
245 | } | |
63f10f0f KK |
246 | |
247 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); | |
248 | if (ACPI_SUCCESS(status)) { | |
ab8e8957 | 249 | root->osc_support_set = support; |
2b8fd918 | 250 | if (control) |
ab8e8957 | 251 | *control = result; |
63f10f0f KK |
252 | } |
253 | return status; | |
254 | } | |
255 | ||
256 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) | |
257 | { | |
258 | acpi_status status; | |
259 | acpi_handle tmp; | |
260 | ||
261 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); | |
262 | if (ACPI_FAILURE(status)) | |
263 | return status; | |
264 | mutex_lock(&osc_lock); | |
ab8e8957 | 265 | status = acpi_pci_query_osc(root, flags, NULL); |
63f10f0f KK |
266 | mutex_unlock(&osc_lock); |
267 | return status; | |
268 | } | |
269 | ||
76d56de5 | 270 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
63f10f0f KK |
271 | { |
272 | struct acpi_pci_root *root; | |
cd4faf9c | 273 | struct acpi_device *device; |
c1aec834 | 274 | |
cd4faf9c TI |
275 | if (acpi_bus_get_device(handle, &device) || |
276 | acpi_match_device_ids(device, root_device_ids)) | |
277 | return NULL; | |
278 | ||
279 | root = acpi_driver_data(device); | |
280 | ||
281 | return root; | |
63f10f0f | 282 | } |
76d56de5 | 283 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
63f10f0f | 284 | |
2f7bbceb AC |
285 | struct acpi_handle_node { |
286 | struct list_head node; | |
287 | acpi_handle handle; | |
288 | }; | |
289 | ||
290 | /** | |
291 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev | |
292 | * @handle: the handle in question | |
293 | * | |
294 | * Given an ACPI CA handle, the desired PCI device is located in the | |
295 | * list of PCI devices. | |
296 | * | |
297 | * If the device is found, its reference count is increased and this | |
298 | * function returns a pointer to its data structure. The caller must | |
299 | * decrement the reference count by calling pci_dev_put(). | |
300 | * If no device is found, %NULL is returned. | |
301 | */ | |
302 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) | |
303 | { | |
304 | int dev, fn; | |
305 | unsigned long long adr; | |
306 | acpi_status status; | |
307 | acpi_handle phandle; | |
308 | struct pci_bus *pbus; | |
309 | struct pci_dev *pdev = NULL; | |
310 | struct acpi_handle_node *node, *tmp; | |
311 | struct acpi_pci_root *root; | |
312 | LIST_HEAD(device_list); | |
313 | ||
314 | /* | |
315 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. | |
316 | */ | |
317 | phandle = handle; | |
318 | while (!acpi_is_root_bridge(phandle)) { | |
319 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); | |
320 | if (!node) | |
321 | goto out; | |
322 | ||
323 | INIT_LIST_HEAD(&node->node); | |
324 | node->handle = phandle; | |
325 | list_add(&node->node, &device_list); | |
326 | ||
327 | status = acpi_get_parent(phandle, &phandle); | |
328 | if (ACPI_FAILURE(status)) | |
329 | goto out; | |
330 | } | |
331 | ||
332 | root = acpi_pci_find_root(phandle); | |
333 | if (!root) | |
334 | goto out; | |
335 | ||
336 | pbus = root->bus; | |
337 | ||
338 | /* | |
339 | * Now, walk back down the PCI device tree until we return to our | |
340 | * original handle. Assumes that everything between the PCI root | |
341 | * bridge and the device we're looking for must be a P2P bridge. | |
342 | */ | |
343 | list_for_each_entry(node, &device_list, node) { | |
344 | acpi_handle hnd = node->handle; | |
345 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); | |
346 | if (ACPI_FAILURE(status)) | |
347 | goto out; | |
348 | dev = (adr >> 16) & 0xffff; | |
349 | fn = adr & 0xffff; | |
350 | ||
351 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); | |
412af978 | 352 | if (!pdev || hnd == handle) |
2f7bbceb AC |
353 | break; |
354 | ||
355 | pbus = pdev->subordinate; | |
356 | pci_dev_put(pdev); | |
497fb54f RW |
357 | |
358 | /* | |
359 | * This function may be called for a non-PCI device that has a | |
360 | * PCI parent (eg. a disk under a PCI SATA controller). In that | |
361 | * case pdev->subordinate will be NULL for the parent. | |
362 | */ | |
363 | if (!pbus) { | |
364 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); | |
365 | pdev = NULL; | |
366 | break; | |
367 | } | |
2f7bbceb AC |
368 | } |
369 | out: | |
370 | list_for_each_entry_safe(node, tmp, &device_list, node) | |
371 | kfree(node); | |
372 | ||
373 | return pdev; | |
374 | } | |
375 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); | |
376 | ||
63f10f0f | 377 | /** |
75fb60f2 RW |
378 | * acpi_pci_osc_control_set - Request control of PCI root _OSC features. |
379 | * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). | |
380 | * @mask: Mask of _OSC bits to request control of, place to store control mask. | |
381 | * @req: Mask of _OSC bits the control of is essential to the caller. | |
63f10f0f | 382 | * |
75fb60f2 RW |
383 | * Run _OSC query for @mask and if that is successful, compare the returned |
384 | * mask of control bits with @req. If all of the @req bits are set in the | |
385 | * returned mask, run _OSC request for it. | |
386 | * | |
387 | * The variable at the @mask address may be modified regardless of whether or | |
388 | * not the function returns success. On success it will contain the mask of | |
389 | * _OSC bits the BIOS has granted control of, but its contents are meaningless | |
390 | * on failure. | |
63f10f0f | 391 | **/ |
75fb60f2 | 392 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
63f10f0f | 393 | { |
75fb60f2 | 394 | struct acpi_pci_root *root; |
63f10f0f | 395 | acpi_status status; |
75fb60f2 | 396 | u32 ctrl, capbuf[3]; |
63f10f0f | 397 | acpi_handle tmp; |
63f10f0f | 398 | |
75fb60f2 RW |
399 | if (!mask) |
400 | return AE_BAD_PARAMETER; | |
401 | ||
402 | ctrl = *mask & OSC_PCI_CONTROL_MASKS; | |
403 | if ((ctrl & req) != req) | |
63f10f0f KK |
404 | return AE_TYPE; |
405 | ||
406 | root = acpi_pci_find_root(handle); | |
407 | if (!root) | |
408 | return AE_NOT_EXIST; | |
409 | ||
b879dc4b RW |
410 | status = acpi_get_handle(handle, "_OSC", &tmp); |
411 | if (ACPI_FAILURE(status)) | |
412 | return status; | |
413 | ||
63f10f0f | 414 | mutex_lock(&osc_lock); |
75fb60f2 RW |
415 | |
416 | *mask = ctrl | root->osc_control_set; | |
63f10f0f | 417 | /* No need to evaluate _OSC if the control was already granted. */ |
75fb60f2 | 418 | if ((root->osc_control_set & ctrl) == ctrl) |
63f10f0f KK |
419 | goto out; |
420 | ||
75fb60f2 RW |
421 | /* Need to check the available controls bits before requesting them. */ |
422 | while (*mask) { | |
423 | status = acpi_pci_query_osc(root, root->osc_support_set, mask); | |
424 | if (ACPI_FAILURE(status)) | |
425 | goto out; | |
426 | if (ctrl == *mask) | |
427 | break; | |
428 | ctrl = *mask; | |
429 | } | |
2b8fd918 | 430 | |
75fb60f2 | 431 | if ((ctrl & req) != req) { |
63f10f0f KK |
432 | status = AE_SUPPORT; |
433 | goto out; | |
434 | } | |
435 | ||
436 | capbuf[OSC_QUERY_TYPE] = 0; | |
437 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; | |
75fb60f2 RW |
438 | capbuf[OSC_CONTROL_TYPE] = ctrl; |
439 | status = acpi_pci_run_osc(handle, capbuf, mask); | |
63f10f0f | 440 | if (ACPI_SUCCESS(status)) |
75fb60f2 | 441 | root->osc_control_set = *mask; |
63f10f0f KK |
442 | out: |
443 | mutex_unlock(&osc_lock); | |
444 | return status; | |
445 | } | |
9f5404d8 | 446 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
63f10f0f | 447 | |
b5678a34 | 448 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
1da177e4 | 449 | { |
f5eebbe1 BH |
450 | unsigned long long segment, bus; |
451 | acpi_status status; | |
452 | int result; | |
453 | struct acpi_pci_root *root; | |
454 | acpi_handle handle; | |
2786f6e3 | 455 | struct acpi_device *child; |
0ef5f8f6 | 456 | u32 flags, base_flags; |
1da177e4 | 457 | |
6ad95513 BH |
458 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
459 | if (!root) | |
460 | return -ENOMEM; | |
461 | ||
f5eebbe1 BH |
462 | segment = 0; |
463 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, | |
464 | &segment); | |
465 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
466 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); | |
6ad95513 BH |
467 | result = -ENODEV; |
468 | goto end; | |
f5eebbe1 | 469 | } |
1da177e4 | 470 | |
f5eebbe1 | 471 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513 BH |
472 | root->secondary.flags = IORESOURCE_BUS; |
473 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); | |
f5eebbe1 | 474 | if (ACPI_FAILURE(status)) { |
6ad95513 BH |
475 | /* |
476 | * We need both the start and end of the downstream bus range | |
477 | * to interpret _CBA (MMCONFIG base address), so it really is | |
478 | * supposed to be in _CRS. If we don't find it there, all we | |
479 | * can do is assume [_BBN-0xFF] or [0-0xFF]. | |
480 | */ | |
481 | root->secondary.end = 0xFF; | |
482 | printk(KERN_WARNING FW_BUG PREFIX | |
483 | "no secondary bus range in _CRS\n"); | |
e545b55a JM |
484 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, |
485 | NULL, &bus); | |
6ad95513 BH |
486 | if (ACPI_SUCCESS(status)) |
487 | root->secondary.start = bus; | |
488 | else if (status == AE_NOT_FOUND) | |
489 | root->secondary.start = 0; | |
490 | else { | |
491 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); | |
492 | result = -ENODEV; | |
493 | goto end; | |
f5eebbe1 BH |
494 | } |
495 | } | |
1da177e4 | 496 | |
f5eebbe1 | 497 | INIT_LIST_HEAD(&root->node); |
32917e5b | 498 | root->device = device; |
0705495d | 499 | root->segment = segment & 0xFFFF; |
1da177e4 LT |
500 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
501 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); | |
db89b4f0 | 502 | device->driver_data = root; |
1da177e4 | 503 | |
f4b57a3b JL |
504 | root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle); |
505 | ||
990a7ac5 AP |
506 | /* |
507 | * All supported architectures that use ACPI have support for | |
508 | * PCI domains, so we indicate this in _OSC support capabilities. | |
509 | */ | |
0ef5f8f6 | 510 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
63f10f0f | 511 | acpi_pci_osc_support(root, flags); |
990a7ac5 | 512 | |
1da177e4 LT |
513 | /* |
514 | * TBD: Need PCI interface for enumeration/configuration of roots. | |
515 | */ | |
516 | ||
6507e6eb | 517 | mutex_lock(&acpi_pci_root_lock); |
4be44fcd | 518 | list_add_tail(&root->node, &acpi_pci_roots); |
6507e6eb | 519 | mutex_unlock(&acpi_pci_root_lock); |
1da177e4 | 520 | |
6ad95513 | 521 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
4be44fcd | 522 | acpi_device_name(device), acpi_device_bid(device), |
6ad95513 | 523 | root->segment, &root->secondary); |
1da177e4 LT |
524 | |
525 | /* | |
526 | * Scan the Root Bridge | |
527 | * -------------------- | |
528 | * Must do this prior to any attempt to bind the root device, as the | |
529 | * PCI namespace does not get created until this call is made (and | |
530 | * thus the root bridge's pci_dev does not exist). | |
531 | */ | |
57283776 | 532 | root->bus = pci_acpi_scan_root(root); |
1da177e4 | 533 | if (!root->bus) { |
6468463a LB |
534 | printk(KERN_ERR PREFIX |
535 | "Bus %04x:%02x not present in PCI namespace\n", | |
6ad95513 | 536 | root->segment, (unsigned int)root->secondary.start); |
1da177e4 | 537 | result = -ENODEV; |
6507e6eb | 538 | goto out_del_root; |
1da177e4 LT |
539 | } |
540 | ||
541 | /* | |
542 | * Attach ACPI-PCI Context | |
543 | * ----------------------- | |
544 | * Thus binding the ACPI and PCI devices. | |
545 | */ | |
499650de | 546 | result = acpi_pci_bind_root(device); |
1da177e4 | 547 | if (result) |
6507e6eb | 548 | goto out_del_root; |
1da177e4 LT |
549 | |
550 | /* | |
551 | * PCI Routing Table | |
552 | * ----------------- | |
553 | * Evaluate and parse _PRT, if exists. | |
554 | */ | |
2d1e0a02 | 555 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
1da177e4 | 556 | if (ACPI_SUCCESS(status)) |
859a3f86 | 557 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
1da177e4 | 558 | |
2786f6e3 RZ |
559 | /* |
560 | * Scan and bind all _ADR-Based Devices | |
561 | */ | |
562 | list_for_each_entry(child, &device->children, node) | |
563 | acpi_pci_bridge_scan(child); | |
564 | ||
0ef5f8f6 AP |
565 | /* Indicate support for various _OSC capabilities. */ |
566 | if (pci_ext_cfg_avail(root->bus->self)) | |
567 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; | |
8b8bae90 | 568 | if (pcie_aspm_support_enabled()) |
3e1b1600 AP |
569 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | |
570 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; | |
07ae95f9 AP |
571 | if (pci_msi_enabled()) |
572 | flags |= OSC_MSI_SUPPORT; | |
2d9c8677 RW |
573 | if (flags != base_flags) { |
574 | status = acpi_pci_osc_support(root, flags); | |
575 | if (ACPI_FAILURE(status)) { | |
576 | dev_info(root->bus->bridge, "ACPI _OSC support " | |
577 | "notification failed, disabling PCIe ASPM\n"); | |
578 | pcie_no_aspm(); | |
579 | flags = base_flags; | |
580 | } | |
581 | } | |
0ef5f8f6 | 582 | |
415e12b2 RW |
583 | if (!pcie_ports_disabled |
584 | && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) { | |
585 | flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL | |
586 | | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | |
587 | | OSC_PCI_EXPRESS_PME_CONTROL; | |
588 | ||
589 | if (pci_aer_available()) { | |
590 | if (aer_acpi_firmware_first()) | |
591 | dev_dbg(root->bus->bridge, | |
592 | "PCIe errors handled by BIOS.\n"); | |
593 | else | |
594 | flags |= OSC_PCI_EXPRESS_AER_CONTROL; | |
595 | } | |
596 | ||
597 | dev_info(root->bus->bridge, | |
598 | "Requesting ACPI _OSC control (0x%02x)\n", flags); | |
599 | ||
600 | status = acpi_pci_osc_control_set(device->handle, &flags, | |
601 | OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); | |
eca67315 | 602 | if (ACPI_SUCCESS(status)) { |
415e12b2 RW |
603 | dev_info(root->bus->bridge, |
604 | "ACPI _OSC control (0x%02x) granted\n", flags); | |
3c076351 MG |
605 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
606 | /* | |
607 | * We have ASPM control, but the FADT indicates | |
608 | * that it's unsupported. Clear it. | |
609 | */ | |
610 | pcie_clear_aspm(root->bus); | |
611 | } | |
eca67315 | 612 | } else { |
a246670d RW |
613 | dev_info(root->bus->bridge, |
614 | "ACPI _OSC request failed (%s), " | |
615 | "returned control mask: 0x%02x\n", | |
616 | acpi_format_exception(status), flags); | |
617 | pr_info("ACPI _OSC control for PCIe not granted, " | |
618 | "disabling ASPM\n"); | |
eca67315 NC |
619 | pcie_no_aspm(); |
620 | } | |
a246670d RW |
621 | } else { |
622 | dev_info(root->bus->bridge, | |
623 | "Unable to request _OSC control " | |
624 | "(_OSC support mask: 0x%02x)\n", flags); | |
415e12b2 RW |
625 | } |
626 | ||
b67ea761 RW |
627 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
628 | if (device->wakeup.flags.run_wake) | |
629 | device_set_run_wake(root->bus->bridge, true); | |
630 | ||
f5eebbe1 | 631 | return 0; |
1da177e4 | 632 | |
6507e6eb TI |
633 | out_del_root: |
634 | mutex_lock(&acpi_pci_root_lock); | |
635 | list_del(&root->node); | |
636 | mutex_unlock(&acpi_pci_root_lock); | |
f5eebbe1 | 637 | end: |
f5eebbe1 | 638 | kfree(root); |
d550d98d | 639 | return result; |
1da177e4 LT |
640 | } |
641 | ||
4be44fcd | 642 | static int acpi_pci_root_start(struct acpi_device *device) |
c431ada4 | 643 | { |
caf420c6 | 644 | struct acpi_pci_root *root = acpi_driver_data(device); |
c8e9afb1 JL |
645 | struct acpi_pci_driver *driver; |
646 | ||
d0020f65 | 647 | mutex_lock(&acpi_pci_root_lock); |
c8e9afb1 JL |
648 | list_for_each_entry(driver, &acpi_pci_drivers, node) |
649 | if (driver->add) | |
55bfe3c0 | 650 | driver->add(root); |
d0020f65 | 651 | mutex_unlock(&acpi_pci_root_lock); |
c431ada4 | 652 | |
caf420c6 | 653 | pci_bus_add_devices(root->bus); |
c8e9afb1 | 654 | |
caf420c6 | 655 | return 0; |
c431ada4 | 656 | } |
1da177e4 | 657 | |
4be44fcd | 658 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
1da177e4 | 659 | { |
caf420c6 | 660 | struct acpi_pci_root *root = acpi_driver_data(device); |
c8e9afb1 JL |
661 | struct acpi_pci_driver *driver; |
662 | ||
d0020f65 | 663 | mutex_lock(&acpi_pci_root_lock); |
c8e9afb1 JL |
664 | list_for_each_entry(driver, &acpi_pci_drivers, node) |
665 | if (driver->remove) | |
55bfe3c0 | 666 | driver->remove(root); |
1da177e4 | 667 | |
b67ea761 RW |
668 | device_set_run_wake(root->bus->bridge, false); |
669 | pci_acpi_remove_bus_pm_notifier(device); | |
670 | ||
6507e6eb TI |
671 | list_del(&root->node); |
672 | mutex_unlock(&acpi_pci_root_lock); | |
1da177e4 | 673 | kfree(root); |
d550d98d | 674 | return 0; |
1da177e4 LT |
675 | } |
676 | ||
4be44fcd | 677 | static int __init acpi_pci_root_init(void) |
1da177e4 | 678 | { |
d3072e6a RW |
679 | acpi_hest_init(); |
680 | ||
1da177e4 | 681 | if (acpi_pci_disabled) |
d550d98d | 682 | return 0; |
1da177e4 | 683 | |
7bc5e3f2 | 684 | pci_acpi_crs_quirks(); |
1da177e4 | 685 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
d550d98d | 686 | return -ENODEV; |
1da177e4 | 687 | |
d550d98d | 688 | return 0; |
1da177e4 LT |
689 | } |
690 | ||
691 | subsys_initcall(acpi_pci_root_init); |