Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/acpi/pci_root.c

  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>
 30 #include <linux/mutex.h>
 31 #include <linux/pm.h>
 32 #include <linux/pm_runtime.h>
 33 #include <linux/pci.h>
 34 #include <linux/pci-acpi.h>
 35 #include <linux/pci-aspm.h>
 36 #include <linux/acpi.h>
 37 #include <linux/slab.h>
 38 #include <acpi/apei.h>  /* for acpi_hest_init() */
 39 
 40 #include "internal.h"
 41 
 42 #define _COMPONENT              ACPI_PCI_COMPONENT
 43 ACPI_MODULE_NAME("pci_root");
 44 #define ACPI_PCI_ROOT_CLASS             "pci_bridge"
 45 #define ACPI_PCI_ROOT_DEVICE_NAME       "PCI Root Bridge"
 46 static int acpi_pci_root_add(struct acpi_device *device,
 47                              const struct acpi_device_id *not_used);
 48 static void acpi_pci_root_remove(struct acpi_device *device);
 49 
 50 static int acpi_pci_root_scan_dependent(struct acpi_device *adev)
 51 {
 52         acpiphp_check_host_bridge(adev);
 53         return 0;
 54 }
 55 
 56 #define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \
 57                                 | OSC_PCI_ASPM_SUPPORT \
 58                                 | OSC_PCI_CLOCK_PM_SUPPORT \
 59                                 | OSC_PCI_MSI_SUPPORT)
 60 
 61 static const struct acpi_device_id root_device_ids[] = {
 62         {"PNP0A03", 0},
 63         {"", 0},
 64 };
 65 
 66 static struct acpi_scan_handler pci_root_handler = {
 67         .ids = root_device_ids,
 68         .attach = acpi_pci_root_add,
 69         .detach = acpi_pci_root_remove,
 70         .hotplug = {
 71                 .enabled = true,
 72                 .scan_dependent = acpi_pci_root_scan_dependent,
 73         },
 74 };
 75 
 76 static DEFINE_MUTEX(osc_lock);
 77 
 78 /**
 79  * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
 80  * @handle - the ACPI CA node in question.
 81  *
 82  * Note: we could make this API take a struct acpi_device * instead, but
 83  * for now, it's more convenient to operate on an acpi_handle.
 84  */
 85 int acpi_is_root_bridge(acpi_handle handle)
 86 {
 87         int ret;
 88         struct acpi_device *device;
 89 
 90         ret = acpi_bus_get_device(handle, &device);
 91         if (ret)
 92                 return 0;
 93 
 94         ret = acpi_match_device_ids(device, root_device_ids);
 95         if (ret)
 96                 return 0;
 97         else
 98                 return 1;
 99 }
100 EXPORT_SYMBOL_GPL(acpi_is_root_bridge);
101 
102 static acpi_status
103 get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
104 {
105         struct resource *res = data;
106         struct acpi_resource_address64 address;
107         acpi_status status;
108 
109         status = acpi_resource_to_address64(resource, &address);
110         if (ACPI_FAILURE(status))
111                 return AE_OK;
112 
113         if ((address.address_length > 0) &&
114             (address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
115                 res->start = address.minimum;
116                 res->end = address.minimum + address.address_length - 1;
117         }
118 
119         return AE_OK;
120 }
121 
122 static acpi_status try_get_root_bridge_busnr(acpi_handle handle,
123                                              struct resource *res)
124 {
125         acpi_status status;
126 
127         res->start = -1;
128         status =
129             acpi_walk_resources(handle, METHOD_NAME__CRS,
130                                 get_root_bridge_busnr_callback, res);
131         if (ACPI_FAILURE(status))
132                 return status;
133         if (res->start == -1)
134                 return AE_ERROR;
135         return AE_OK;
136 }
137 
138 struct pci_osc_bit_struct {
139         u32 bit;
140         char *desc;
141 };
142 
143 static struct pci_osc_bit_struct pci_osc_support_bit[] = {
144         { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" },
145         { OSC_PCI_ASPM_SUPPORT, "ASPM" },
146         { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" },
147         { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" },
148         { OSC_PCI_MSI_SUPPORT, "MSI" },
149 };
150 
151 static struct pci_osc_bit_struct pci_osc_control_bit[] = {
152         { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" },
153         { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" },
154         { OSC_PCI_EXPRESS_PME_CONTROL, "PME" },
155         { OSC_PCI_EXPRESS_AER_CONTROL, "AER" },
156         { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" },
157 };
158 
159 static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,
160                             struct pci_osc_bit_struct *table, int size)
161 {
162         char buf[80];
163         int i, len = 0;
164         struct pci_osc_bit_struct *entry;
165 
166         buf[0] = '\0';
167         for (i = 0, entry = table; i < size; i++, entry++)
168                 if (word & entry->bit)
169                         len += snprintf(buf + len, sizeof(buf) - len, "%s%s",
170                                         len ? " " : "", entry->desc);
171 
172         dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);
173 }
174 
175 static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)
176 {
177         decode_osc_bits(root, msg, word, pci_osc_support_bit,
178                         ARRAY_SIZE(pci_osc_support_bit));
179 }
180 
181 static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)
182 {
183         decode_osc_bits(root, msg, word, pci_osc_control_bit,
184                         ARRAY_SIZE(pci_osc_control_bit));
185 }
186 
187 static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766";
188 
189 static acpi_status acpi_pci_run_osc(acpi_handle handle,
190                                     const u32 *capbuf, u32 *retval)
191 {
192         struct acpi_osc_context context = {
193                 .uuid_str = pci_osc_uuid_str,
194                 .rev = 1,
195                 .cap.length = 12,
196                 .cap.pointer = (void *)capbuf,
197         };
198         acpi_status status;
199 
200         status = acpi_run_osc(handle, &context);
201         if (ACPI_SUCCESS(status)) {
202                 *retval = *((u32 *)(context.ret.pointer + 8));
203                 kfree(context.ret.pointer);
204         }
205         return status;
206 }
207 
208 static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
209                                         u32 support,
210                                         u32 *control)
211 {
212         acpi_status status;
213         u32 result, capbuf[3];
214 
215         support &= OSC_PCI_SUPPORT_MASKS;
216         support |= root->osc_support_set;
217 
218         capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
219         capbuf[OSC_SUPPORT_DWORD] = support;
220         if (control) {
221                 *control &= OSC_PCI_CONTROL_MASKS;
222                 capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set;
223         } else {
224                 /* Run _OSC query only with existing controls. */
225                 capbuf[OSC_CONTROL_DWORD] = root->osc_control_set;
226         }
227 
228         status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
229         if (ACPI_SUCCESS(status)) {
230                 root->osc_support_set = support;
231                 if (control)
232                         *control = result;
233         }
234         return status;
235 }
236 
237 static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
238 {
239         acpi_status status;
240 
241         mutex_lock(&osc_lock);
242         status = acpi_pci_query_osc(root, flags, NULL);
243         mutex_unlock(&osc_lock);
244         return status;
245 }
246 
247 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
248 {
249         struct acpi_pci_root *root;
250         struct acpi_device *device;
251 
252         if (acpi_bus_get_device(handle, &device) ||
253             acpi_match_device_ids(device, root_device_ids))
254                 return NULL;
255 
256         root = acpi_driver_data(device);
257 
258         return root;
259 }
260 EXPORT_SYMBOL_GPL(acpi_pci_find_root);
261 
262 struct acpi_handle_node {
263         struct list_head node;
264         acpi_handle handle;
265 };
266 
267 /**
268  * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev
269  * @handle: the handle in question
270  *
271  * Given an ACPI CA handle, the desired PCI device is located in the
272  * list of PCI devices.
273  *
274  * If the device is found, its reference count is increased and this
275  * function returns a pointer to its data structure.  The caller must
276  * decrement the reference count by calling pci_dev_put().
277  * If no device is found, %NULL is returned.
278  */
279 struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
280 {
281         int dev, fn;
282         unsigned long long adr;
283         acpi_status status;
284         acpi_handle phandle;
285         struct pci_bus *pbus;
286         struct pci_dev *pdev = NULL;
287         struct acpi_handle_node *node, *tmp;
288         struct acpi_pci_root *root;
289         LIST_HEAD(device_list);
290 
291         /*
292          * Walk up the ACPI CA namespace until we reach a PCI root bridge.
293          */
294         phandle = handle;
295         while (!acpi_is_root_bridge(phandle)) {
296                 node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL);
297                 if (!node)
298                         goto out;
299 
300                 INIT_LIST_HEAD(&node->node);
301                 node->handle = phandle;
302                 list_add(&node->node, &device_list);
303 
304                 status = acpi_get_parent(phandle, &phandle);
305                 if (ACPI_FAILURE(status))
306                         goto out;
307         }
308 
309         root = acpi_pci_find_root(phandle);
310         if (!root)
311                 goto out;
312 
313         pbus = root->bus;
314 
315         /*
316          * Now, walk back down the PCI device tree until we return to our
317          * original handle. Assumes that everything between the PCI root
318          * bridge and the device we're looking for must be a P2P bridge.
319          */
320         list_for_each_entry(node, &device_list, node) {
321                 acpi_handle hnd = node->handle;
322                 status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr);
323                 if (ACPI_FAILURE(status))
324                         goto out;
325                 dev = (adr >> 16) & 0xffff;
326                 fn  = adr & 0xffff;
327 
328                 pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn));
329                 if (!pdev || hnd == handle)
330                         break;
331 
332                 pbus = pdev->subordinate;
333                 pci_dev_put(pdev);
334 
335                 /*
336                  * This function may be called for a non-PCI device that has a
337                  * PCI parent (eg. a disk under a PCI SATA controller).  In that
338                  * case pdev->subordinate will be NULL for the parent.
339                  */
340                 if (!pbus) {
341                         dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n");
342                         pdev = NULL;
343                         break;
344                 }
345         }
346 out:
347         list_for_each_entry_safe(node, tmp, &device_list, node)
348                 kfree(node);
349 
350         return pdev;
351 }
352 EXPORT_SYMBOL_GPL(acpi_get_pci_dev);
353 
354 /**
355  * acpi_pci_osc_control_set - Request control of PCI root _OSC features.
356  * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex).
357  * @mask: Mask of _OSC bits to request control of, place to store control mask.
358  * @req: Mask of _OSC bits the control of is essential to the caller.
359  *
360  * Run _OSC query for @mask and if that is successful, compare the returned
361  * mask of control bits with @req.  If all of the @req bits are set in the
362  * returned mask, run _OSC request for it.
363  *
364  * The variable at the @mask address may be modified regardless of whether or
365  * not the function returns success.  On success it will contain the mask of
366  * _OSC bits the BIOS has granted control of, but its contents are meaningless
367  * on failure.
368  **/
369 acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req)
370 {
371         struct acpi_pci_root *root;
372         acpi_status status = AE_OK;
373         u32 ctrl, capbuf[3];
374 
375         if (!mask)
376                 return AE_BAD_PARAMETER;
377 
378         ctrl = *mask & OSC_PCI_CONTROL_MASKS;
379         if ((ctrl & req) != req)
380                 return AE_TYPE;
381 
382         root = acpi_pci_find_root(handle);
383         if (!root)
384                 return AE_NOT_EXIST;
385 
386         mutex_lock(&osc_lock);
387 
388         *mask = ctrl | root->osc_control_set;
389         /* No need to evaluate _OSC if the control was already granted. */
390         if ((root->osc_control_set & ctrl) == ctrl)
391                 goto out;
392 
393         /* Need to check the available controls bits before requesting them. */
394         while (*mask) {
395                 status = acpi_pci_query_osc(root, root->osc_support_set, mask);
396                 if (ACPI_FAILURE(status))
397                         goto out;
398                 if (ctrl == *mask)
399                         break;
400                 decode_osc_control(root, "platform does not support",
401                                    ctrl & ~(*mask));
402                 ctrl = *mask;
403         }
404 
405         if ((ctrl & req) != req) {
406                 decode_osc_control(root, "not requesting control; platform does not support",
407                                    req & ~(ctrl));
408                 status = AE_SUPPORT;
409                 goto out;
410         }
411 
412         capbuf[OSC_QUERY_DWORD] = 0;
413         capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set;
414         capbuf[OSC_CONTROL_DWORD] = ctrl;
415         status = acpi_pci_run_osc(handle, capbuf, mask);
416         if (ACPI_SUCCESS(status))
417                 root->osc_control_set = *mask;
418 out:
419         mutex_unlock(&osc_lock);
420         return status;
421 }
422 EXPORT_SYMBOL(acpi_pci_osc_control_set);
423 
424 static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
425                                  int *clear_aspm)
426 {
427         u32 support, control, requested;
428         acpi_status status;
429         struct acpi_device *device = root->device;
430         acpi_handle handle = device->handle;
431 
432         /*
433          * All supported architectures that use ACPI have support for
434          * PCI domains, so we indicate this in _OSC support capabilities.
435          */
436         support = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
437         if (pci_ext_cfg_avail())
438                 support |= OSC_PCI_EXT_CONFIG_SUPPORT;
439         if (pcie_aspm_support_enabled())
440                 support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
441         if (pci_msi_enabled())
442                 support |= OSC_PCI_MSI_SUPPORT;
443 
444         decode_osc_support(root, "OS supports", support);
445         status = acpi_pci_osc_support(root, support);
446         if (ACPI_FAILURE(status)) {
447                 dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
448                          acpi_format_exception(status));
449                 *no_aspm = 1;
450                 return;
451         }
452 
453         if (pcie_ports_disabled) {
454                 dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n");
455                 return;
456         }
457 
458         if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) {
459                 decode_osc_support(root, "not requesting OS control; OS requires",
460                                    ACPI_PCIE_REQ_SUPPORT);
461                 return;
462         }
463 
464         control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
465                 | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
466                 | OSC_PCI_EXPRESS_PME_CONTROL;
467 
468         if (pci_aer_available()) {
469                 if (aer_acpi_firmware_first())
470                         dev_info(&device->dev,
471                                  "PCIe AER handled by firmware\n");
472                 else
473                         control |= OSC_PCI_EXPRESS_AER_CONTROL;
474         }
475 
476         requested = control;
477         status = acpi_pci_osc_control_set(handle, &control,
478                                           OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
479         if (ACPI_SUCCESS(status)) {
480                 decode_osc_control(root, "OS now controls", control);
481                 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
482                         /*
483                          * We have ASPM control, but the FADT indicates
484                          * that it's unsupported. Clear it.
485                          */
486                         *clear_aspm = 1;
487                 }
488         } else {
489                 decode_osc_control(root, "OS requested", requested);
490                 decode_osc_control(root, "platform willing to grant", control);
491                 dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
492                         acpi_format_exception(status));
493 
494                 /*
495                  * We want to disable ASPM here, but aspm_disabled
496                  * needs to remain in its state from boot so that we
497                  * properly handle PCIe 1.1 devices.  So we set this
498                  * flag here, to defer the action until after the ACPI
499                  * root scan.
500                  */
501                 *no_aspm = 1;
502         }
503 }
504 
505 static int acpi_pci_root_add(struct acpi_device *device,
506                              const struct acpi_device_id *not_used)
507 {
508         unsigned long long segment, bus;
509         acpi_status status;
510         int result;
511         struct acpi_pci_root *root;
512         acpi_handle handle = device->handle;
513         int no_aspm = 0, clear_aspm = 0;
514 
515         root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
516         if (!root)
517                 return -ENOMEM;
518 
519         segment = 0;
520         status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL,
521                                        &segment);
522         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
523                 dev_err(&device->dev,  "can't evaluate _SEG\n");
524                 result = -ENODEV;
525                 goto end;
526         }
527 
528         /* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
529         root->secondary.flags = IORESOURCE_BUS;
530         status = try_get_root_bridge_busnr(handle, &root->secondary);
531         if (ACPI_FAILURE(status)) {
532                 /*
533                  * We need both the start and end of the downstream bus range
534                  * to interpret _CBA (MMCONFIG base address), so it really is
535                  * supposed to be in _CRS.  If we don't find it there, all we
536                  * can do is assume [_BBN-0xFF] or [0-0xFF].
537                  */
538                 root->secondary.end = 0xFF;
539                 dev_warn(&device->dev,
540                          FW_BUG "no secondary bus range in _CRS\n");
541                 status = acpi_evaluate_integer(handle, METHOD_NAME__BBN,
542                                                NULL, &bus);
543                 if (ACPI_SUCCESS(status))
544                         root->secondary.start = bus;
545                 else if (status == AE_NOT_FOUND)
546                         root->secondary.start = 0;
547                 else {
548                         dev_err(&device->dev, "can't evaluate _BBN\n");
549                         result = -ENODEV;
550                         goto end;
551                 }
552         }
553 
554         root->device = device;
555         root->segment = segment & 0xFFFF;
556         strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
557         strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
558         device->driver_data = root;
559 
560         pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
561                acpi_device_name(device), acpi_device_bid(device),
562                root->segment, &root->secondary);
563 
564         root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);
565 
566         negotiate_os_control(root, &no_aspm, &clear_aspm);
567 
568         /*
569          * TBD: Need PCI interface for enumeration/configuration of roots.
570          */
571 
572         /*
573          * Scan the Root Bridge
574          * --------------------
575          * Must do this prior to any attempt to bind the root device, as the
576          * PCI namespace does not get created until this call is made (and
577          * thus the root bridge's pci_dev does not exist).
578          */
579         root->bus = pci_acpi_scan_root(root);
580         if (!root->bus) {
581                 dev_err(&device->dev,
582                         "Bus %04x:%02x not present in PCI namespace\n",
583                         root->segment, (unsigned int)root->secondary.start);
584                 device->driver_data = NULL;
585                 result = -ENODEV;
586                 goto end;
587         }
588 
589         if (clear_aspm) {
590                 dev_info(&device->dev, "Disabling ASPM (FADT indicates it is unsupported)\n");
591                 pcie_clear_aspm(root->bus);
592         }
593         if (no_aspm)
594                 pcie_no_aspm();
595 
596         pci_acpi_add_bus_pm_notifier(device, root->bus);
597         if (device->wakeup.flags.run_wake)
598                 device_set_run_wake(root->bus->bridge, true);
599 
600         if (system_state != SYSTEM_BOOTING) {
601                 pcibios_resource_survey_bus(root->bus);
602                 pci_assign_unassigned_root_bus_resources(root->bus);
603         }
604 
605         pci_lock_rescan_remove();
606         pci_bus_add_devices(root->bus);
607         pci_unlock_rescan_remove();
608         return 1;
609 
610 end:
611         kfree(root);
612         return result;
613 }
614 
615 static void acpi_pci_root_remove(struct acpi_device *device)
616 {
617         struct acpi_pci_root *root = acpi_driver_data(device);
618 
619         pci_lock_rescan_remove();
620 
621         pci_stop_root_bus(root->bus);
622 
623         device_set_run_wake(root->bus->bridge, false);
624         pci_acpi_remove_bus_pm_notifier(device);
625 
626         pci_remove_root_bus(root->bus);
627 
628         pci_unlock_rescan_remove();
629 
630         kfree(root);
631 }
632 
633 void __init acpi_pci_root_init(void)
634 {
635         acpi_hest_init();
636         if (acpi_pci_disabled)
637                 return;
638 
639         pci_acpi_crs_quirks();
640         acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root");
641 }
642 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us