2 #include <linux/acpi.h>
3 #include <linux/init.h>
6 #include <linux/slab.h>
8 #include <asm/pci_x86.h>
10 struct pci_root_info {
11 struct acpi_device *bridge;
15 resource_size_t *res_offset;
16 struct pci_sysdata sd;
17 #ifdef CONFIG_PCI_MMCONFIG
25 static bool pci_use_crs = true;
26 static bool pci_ignore_seg = false;
28 static int __init set_use_crs(const struct dmi_system_id *id)
34 static int __init set_nouse_crs(const struct dmi_system_id *id)
40 static int __init set_ignore_seg(const struct dmi_system_id *id)
42 printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
43 pci_ignore_seg = true;
47 static const struct dmi_system_id pci_crs_quirks[] __initconst = {
48 /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
50 .callback = set_use_crs,
51 .ident = "IBM System x3800",
53 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
54 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
57 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
58 /* 2006 AMD HT/VIA system with two host bridges */
60 .callback = set_use_crs,
61 .ident = "ASRock ALiveSATA2-GLAN",
63 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
66 /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
67 /* 2006 AMD HT/VIA system with two host bridges */
69 .callback = set_use_crs,
70 .ident = "ASUS M2V-MX SE",
72 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
73 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
74 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
77 /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
79 .callback = set_use_crs,
80 .ident = "MSI MS-7253",
82 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
83 DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
84 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
88 /* Now for the blacklist.. */
90 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
92 .callback = set_nouse_crs,
93 .ident = "Dell Studio 1557",
95 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
96 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
97 DMI_MATCH(DMI_BIOS_VERSION, "A09"),
100 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
102 .callback = set_nouse_crs,
103 .ident = "Thinkpad SL510",
105 DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
106 DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
107 DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
111 /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
113 .callback = set_ignore_seg,
114 .ident = "HP xw9300",
116 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
117 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
123 void __init pci_acpi_crs_quirks(void)
127 if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
130 dmi_check_system(pci_crs_quirks);
133 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
134 * takes precedence over anything we figured out above.
136 if (pci_probe & PCI_ROOT_NO_CRS)
138 else if (pci_probe & PCI_USE__CRS)
141 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
142 "if necessary, use \"pci=%s\" and report a bug\n",
143 pci_use_crs ? "Using" : "Ignoring",
144 pci_use_crs ? "nocrs" : "use_crs");
147 #ifdef CONFIG_PCI_MMCONFIG
148 static int __devinit check_segment(u16 seg, struct device *dev, char *estr)
152 "%s can't access PCI configuration "
153 "space under this host bridge.\n",
159 * Failure in adding MMCFG information is not fatal,
160 * just can't access extended configuration space of
161 * devices under this host bridge.
164 "%s can't access extended PCI configuration "
165 "space under this bridge.\n",
171 static int __devinit setup_mcfg_map(struct pci_root_info *info,
172 u16 seg, u8 start, u8 end,
176 struct device *dev = &info->bridge->dev;
178 info->start_bus = start;
180 info->mcfg_added = false;
182 /* return success if MMCFG is not in use */
183 if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
186 if (!(pci_probe & PCI_PROBE_MMCONF))
187 return check_segment(seg, dev, "MMCONFIG is disabled,");
189 result = pci_mmconfig_insert(dev, seg, start, end, addr);
191 /* enable MMCFG if it hasn't been enabled yet */
192 if (raw_pci_ext_ops == NULL)
193 raw_pci_ext_ops = &pci_mmcfg;
194 info->mcfg_added = true;
195 } else if (result != -EEXIST)
196 return check_segment(seg, dev,
197 "fail to add MMCONFIG information,");
202 static void teardown_mcfg_map(struct pci_root_info *info)
204 if (info->mcfg_added) {
205 pci_mmconfig_delete(info->segment, info->start_bus,
207 info->mcfg_added = false;
211 static int __devinit setup_mcfg_map(struct pci_root_info *info,
212 u16 seg, u8 start, u8 end,
217 static void teardown_mcfg_map(struct pci_root_info *info)
223 resource_to_addr(struct acpi_resource *resource,
224 struct acpi_resource_address64 *addr)
227 struct acpi_resource_memory24 *memory24;
228 struct acpi_resource_memory32 *memory32;
229 struct acpi_resource_fixed_memory32 *fixed_memory32;
231 memset(addr, 0, sizeof(*addr));
232 switch (resource->type) {
233 case ACPI_RESOURCE_TYPE_MEMORY24:
234 memory24 = &resource->data.memory24;
235 addr->resource_type = ACPI_MEMORY_RANGE;
236 addr->minimum = memory24->minimum;
237 addr->address_length = memory24->address_length;
238 addr->maximum = addr->minimum + addr->address_length - 1;
240 case ACPI_RESOURCE_TYPE_MEMORY32:
241 memory32 = &resource->data.memory32;
242 addr->resource_type = ACPI_MEMORY_RANGE;
243 addr->minimum = memory32->minimum;
244 addr->address_length = memory32->address_length;
245 addr->maximum = addr->minimum + addr->address_length - 1;
247 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
248 fixed_memory32 = &resource->data.fixed_memory32;
249 addr->resource_type = ACPI_MEMORY_RANGE;
250 addr->minimum = fixed_memory32->address;
251 addr->address_length = fixed_memory32->address_length;
252 addr->maximum = addr->minimum + addr->address_length - 1;
254 case ACPI_RESOURCE_TYPE_ADDRESS16:
255 case ACPI_RESOURCE_TYPE_ADDRESS32:
256 case ACPI_RESOURCE_TYPE_ADDRESS64:
257 status = acpi_resource_to_address64(resource, addr);
258 if (ACPI_SUCCESS(status) &&
259 (addr->resource_type == ACPI_MEMORY_RANGE ||
260 addr->resource_type == ACPI_IO_RANGE) &&
261 addr->address_length > 0) {
270 count_resource(struct acpi_resource *acpi_res, void *data)
272 struct pci_root_info *info = data;
273 struct acpi_resource_address64 addr;
276 status = resource_to_addr(acpi_res, &addr);
277 if (ACPI_SUCCESS(status))
283 setup_resource(struct acpi_resource *acpi_res, void *data)
285 struct pci_root_info *info = data;
286 struct resource *res;
287 struct acpi_resource_address64 addr;
290 u64 start, orig_end, end;
292 status = resource_to_addr(acpi_res, &addr);
293 if (!ACPI_SUCCESS(status))
296 if (addr.resource_type == ACPI_MEMORY_RANGE) {
297 flags = IORESOURCE_MEM;
298 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
299 flags |= IORESOURCE_PREFETCH;
300 } else if (addr.resource_type == ACPI_IO_RANGE) {
301 flags = IORESOURCE_IO;
305 start = addr.minimum + addr.translation_offset;
306 orig_end = end = addr.maximum + addr.translation_offset;
308 /* Exclude non-addressable range or non-addressable portion of range */
309 end = min(end, (u64)iomem_resource.end);
311 dev_info(&info->bridge->dev,
312 "host bridge window [%#llx-%#llx] "
313 "(ignored, not CPU addressable)\n", start, orig_end);
315 } else if (orig_end != end) {
316 dev_info(&info->bridge->dev,
317 "host bridge window [%#llx-%#llx] "
318 "([%#llx-%#llx] ignored, not CPU addressable)\n",
319 start, orig_end, end + 1, orig_end);
322 res = &info->res[info->res_num];
323 res->name = info->name;
327 info->res_offset[info->res_num] = addr.translation_offset;
330 dev_printk(KERN_DEBUG, &info->bridge->dev,
331 "host bridge window %pR (ignored)\n", res);
340 static void coalesce_windows(struct pci_root_info *info, unsigned long type)
343 struct resource *res1, *res2;
345 for (i = 0; i < info->res_num; i++) {
346 res1 = &info->res[i];
347 if (!(res1->flags & type))
350 for (j = i + 1; j < info->res_num; j++) {
351 res2 = &info->res[j];
352 if (!(res2->flags & type))
356 * I don't like throwing away windows because then
357 * our resources no longer match the ACPI _CRS, but
358 * the kernel resource tree doesn't allow overlaps.
360 if (resource_overlaps(res1, res2)) {
361 res1->start = min(res1->start, res2->start);
362 res1->end = max(res1->end, res2->end);
363 dev_info(&info->bridge->dev,
364 "host bridge window expanded to %pR; %pR ignored\n",
372 static void add_resources(struct pci_root_info *info,
373 struct list_head *resources)
376 struct resource *res, *root, *conflict;
378 coalesce_windows(info, IORESOURCE_MEM);
379 coalesce_windows(info, IORESOURCE_IO);
381 for (i = 0; i < info->res_num; i++) {
384 if (res->flags & IORESOURCE_MEM)
385 root = &iomem_resource;
386 else if (res->flags & IORESOURCE_IO)
387 root = &ioport_resource;
391 conflict = insert_resource_conflict(root, res);
393 dev_info(&info->bridge->dev,
394 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
395 res, conflict->name, conflict);
397 pci_add_resource_offset(resources, res,
398 info->res_offset[i]);
402 static void free_pci_root_info_res(struct pci_root_info *info)
406 kfree(info->res_offset);
407 info->res_offset = NULL;
411 static void __release_pci_root_info(struct pci_root_info *info)
414 struct resource *res;
416 for (i = 0; i < info->res_num; i++) {
422 if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
425 release_resource(res);
428 free_pci_root_info_res(info);
430 teardown_mcfg_map(info);
435 static void release_pci_root_info(struct pci_host_bridge *bridge)
437 struct pci_root_info *info = bridge->release_data;
439 __release_pci_root_info(info);
443 probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
444 int busnum, int domain)
448 sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
449 info->bridge = device;
452 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
457 size = sizeof(*info->res) * info->res_num;
458 info->res = kzalloc(size, GFP_KERNEL);
464 size = sizeof(*info->res_offset) * info->res_num;
466 info->res_offset = kzalloc(size, GFP_KERNEL);
467 if (!info->res_offset) {
473 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
477 struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
479 struct acpi_device *device = root->device;
480 struct pci_root_info *info = NULL;
481 int domain = root->segment;
482 int busnum = root->secondary.start;
483 LIST_HEAD(resources);
484 struct pci_bus *bus = NULL;
485 struct pci_sysdata *sd;
487 #ifdef CONFIG_ACPI_NUMA
494 if (domain && !pci_domains_supported) {
495 printk(KERN_WARNING "pci_bus %04x:%02x: "
496 "ignored (multiple domains not supported)\n",
502 #ifdef CONFIG_ACPI_NUMA
503 pxm = acpi_get_pxm(device->handle);
505 node = pxm_to_node(pxm);
507 set_mp_bus_to_node(busnum, node);
510 node = get_mp_bus_to_node(busnum);
512 if (node != -1 && !node_online(node))
515 info = kzalloc(sizeof(*info), GFP_KERNEL);
517 printk(KERN_WARNING "pci_bus %04x:%02x: "
518 "ignored (out of memory)\n", domain, busnum);
526 * Maybe the desired pci bus has been already scanned. In such case
527 * it is unnecessary to scan the pci bus with the given domain,busnum.
529 bus = pci_find_bus(domain, busnum);
532 * If the desired bus exits, the content of bus->sysdata will
535 memcpy(bus->sysdata, sd, sizeof(*sd));
538 probe_pci_root_info(info, device, busnum, domain);
540 /* insert busn res at first */
541 pci_add_resource(&resources, &root->secondary);
543 * _CRS with no apertures is normal, so only fall back to
544 * defaults or native bridge info if we're ignoring _CRS.
547 add_resources(info, &resources);
549 free_pci_root_info_res(info);
550 x86_pci_root_bus_resources(busnum, &resources);
553 if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
554 (u8)root->secondary.end, root->mcfg_addr))
555 bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
559 pci_scan_child_bus(bus);
560 pci_set_host_bridge_release(
561 to_pci_host_bridge(bus->bridge),
562 release_pci_root_info, info);
564 pci_free_resource_list(&resources);
565 __release_pci_root_info(info);
569 /* After the PCI-E bus has been walked and all devices discovered,
570 * configure any settings of the fabric that might be necessary.
573 struct pci_bus *child;
574 list_for_each_entry(child, &bus->children, node) {
575 struct pci_dev *self = child->self;
579 pcie_bus_configure_settings(child, self->pcie_mpss);
583 if (bus && node != -1) {
584 #ifdef CONFIG_ACPI_NUMA
586 dev_printk(KERN_DEBUG, &bus->dev,
587 "on NUMA node %d (pxm %d)\n", node, pxm);
589 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
596 int __init pci_acpi_init(void)
598 struct pci_dev *dev = NULL;
603 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
604 acpi_irq_penalty_init();
605 pcibios_enable_irq = acpi_pci_irq_enable;
606 pcibios_disable_irq = acpi_pci_irq_disable;
607 x86_init.pci.init_irq = x86_init_noop;
611 * PCI IRQ routing is set up by pci_enable_device(), but we
612 * also do it here in case there are still broken drivers that
613 * don't use pci_enable_device().
615 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
616 for_each_pci_dev(dev)
617 acpi_pci_irq_enable(dev);