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 struct list_head *resources;
19 static bool pci_use_crs = true;
21 static int __init set_use_crs(const struct dmi_system_id *id)
27 static int __init set_nouse_crs(const struct dmi_system_id *id)
33 static const struct dmi_system_id pci_use_crs_table[] __initconst = {
34 /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
36 .callback = set_use_crs,
37 .ident = "IBM System x3800",
39 DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
40 DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
43 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
44 /* 2006 AMD HT/VIA system with two host bridges */
46 .callback = set_use_crs,
47 .ident = "ASRock ALiveSATA2-GLAN",
49 DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
52 /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
53 /* 2006 AMD HT/VIA system with two host bridges */
55 .callback = set_use_crs,
56 .ident = "ASUS M2V-MX SE",
58 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
59 DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
60 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
63 /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
65 .callback = set_use_crs,
66 .ident = "MSI MS-7253",
68 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
69 DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
70 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
74 /* Now for the blacklist.. */
76 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
78 .callback = set_nouse_crs,
79 .ident = "Dell Studio 1557",
81 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
82 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
83 DMI_MATCH(DMI_BIOS_VERSION, "A09"),
86 /* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
88 .callback = set_nouse_crs,
89 .ident = "Thinkpad SL510",
91 DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
92 DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
93 DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
99 void __init pci_acpi_crs_quirks(void)
103 if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
106 dmi_check_system(pci_use_crs_table);
109 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
110 * takes precedence over anything we figured out above.
112 if (pci_probe & PCI_ROOT_NO_CRS)
114 else if (pci_probe & PCI_USE__CRS)
117 printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
118 "if necessary, use \"pci=%s\" and report a bug\n",
119 pci_use_crs ? "Using" : "Ignoring",
120 pci_use_crs ? "nocrs" : "use_crs");
124 resource_to_addr(struct acpi_resource *resource,
125 struct acpi_resource_address64 *addr)
128 struct acpi_resource_memory24 *memory24;
129 struct acpi_resource_memory32 *memory32;
130 struct acpi_resource_fixed_memory32 *fixed_memory32;
132 memset(addr, 0, sizeof(*addr));
133 switch (resource->type) {
134 case ACPI_RESOURCE_TYPE_MEMORY24:
135 memory24 = &resource->data.memory24;
136 addr->resource_type = ACPI_MEMORY_RANGE;
137 addr->minimum = memory24->minimum;
138 addr->address_length = memory24->address_length;
139 addr->maximum = addr->minimum + addr->address_length - 1;
141 case ACPI_RESOURCE_TYPE_MEMORY32:
142 memory32 = &resource->data.memory32;
143 addr->resource_type = ACPI_MEMORY_RANGE;
144 addr->minimum = memory32->minimum;
145 addr->address_length = memory32->address_length;
146 addr->maximum = addr->minimum + addr->address_length - 1;
148 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
149 fixed_memory32 = &resource->data.fixed_memory32;
150 addr->resource_type = ACPI_MEMORY_RANGE;
151 addr->minimum = fixed_memory32->address;
152 addr->address_length = fixed_memory32->address_length;
153 addr->maximum = addr->minimum + addr->address_length - 1;
155 case ACPI_RESOURCE_TYPE_ADDRESS16:
156 case ACPI_RESOURCE_TYPE_ADDRESS32:
157 case ACPI_RESOURCE_TYPE_ADDRESS64:
158 status = acpi_resource_to_address64(resource, addr);
159 if (ACPI_SUCCESS(status) &&
160 (addr->resource_type == ACPI_MEMORY_RANGE ||
161 addr->resource_type == ACPI_IO_RANGE) &&
162 addr->address_length > 0) {
171 count_resource(struct acpi_resource *acpi_res, void *data)
173 struct pci_root_info *info = data;
174 struct acpi_resource_address64 addr;
177 status = resource_to_addr(acpi_res, &addr);
178 if (ACPI_SUCCESS(status))
184 setup_resource(struct acpi_resource *acpi_res, void *data)
186 struct pci_root_info *info = data;
187 struct resource *res;
188 struct acpi_resource_address64 addr;
191 u64 start, orig_end, end;
193 status = resource_to_addr(acpi_res, &addr);
194 if (!ACPI_SUCCESS(status))
197 if (addr.resource_type == ACPI_MEMORY_RANGE) {
198 flags = IORESOURCE_MEM;
199 if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
200 flags |= IORESOURCE_PREFETCH;
201 } else if (addr.resource_type == ACPI_IO_RANGE) {
202 flags = IORESOURCE_IO;
206 start = addr.minimum + addr.translation_offset;
207 orig_end = end = addr.maximum + addr.translation_offset;
209 /* Exclude non-addressable range or non-addressable portion of range */
210 end = min(end, (u64)iomem_resource.end);
212 dev_info(&info->bridge->dev,
213 "host bridge window [%#llx-%#llx] "
214 "(ignored, not CPU addressable)\n", start, orig_end);
216 } else if (orig_end != end) {
217 dev_info(&info->bridge->dev,
218 "host bridge window [%#llx-%#llx] "
219 "([%#llx-%#llx] ignored, not CPU addressable)\n",
220 start, orig_end, end + 1, orig_end);
223 res = &info->res[info->res_num];
224 res->name = info->name;
231 dev_printk(KERN_DEBUG, &info->bridge->dev,
232 "host bridge window %pR (ignored)\n", res);
237 if (addr.translation_offset)
238 dev_info(&info->bridge->dev, "host bridge window %pR "
239 "(PCI address [%#llx-%#llx])\n",
240 res, res->start - addr.translation_offset,
241 res->end - addr.translation_offset);
243 dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
248 static bool resource_contains(struct resource *res, resource_size_t point)
250 if (res->start <= point && point <= res->end)
255 static void coalesce_windows(struct pci_root_info *info, unsigned long type)
258 struct resource *res1, *res2;
260 for (i = 0; i < info->res_num; i++) {
261 res1 = &info->res[i];
262 if (!(res1->flags & type))
265 for (j = i + 1; j < info->res_num; j++) {
266 res2 = &info->res[j];
267 if (!(res2->flags & type))
271 * I don't like throwing away windows because then
272 * our resources no longer match the ACPI _CRS, but
273 * the kernel resource tree doesn't allow overlaps.
275 if (resource_contains(res1, res2->start) ||
276 resource_contains(res1, res2->end) ||
277 resource_contains(res2, res1->start) ||
278 resource_contains(res2, res1->end)) {
279 res1->start = min(res1->start, res2->start);
280 res1->end = max(res1->end, res2->end);
281 dev_info(&info->bridge->dev,
282 "host bridge window expanded to %pR; %pR ignored\n",
290 static void add_resources(struct pci_root_info *info)
293 struct resource *res, *root, *conflict;
295 coalesce_windows(info, IORESOURCE_MEM);
296 coalesce_windows(info, IORESOURCE_IO);
298 for (i = 0; i < info->res_num; i++) {
301 if (res->flags & IORESOURCE_MEM)
302 root = &iomem_resource;
303 else if (res->flags & IORESOURCE_IO)
304 root = &ioport_resource;
308 conflict = insert_resource_conflict(root, res);
310 dev_info(&info->bridge->dev,
311 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
312 res, conflict->name, conflict);
314 pci_add_resource(info->resources, res);
319 get_current_resources(struct acpi_device *device, int busnum,
320 int domain, struct list_head *resources)
322 struct pci_root_info info;
325 info.bridge = device;
327 info.resources = resources;
328 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
333 size = sizeof(*info.res) * info.res_num;
334 info.res = kmalloc(size, GFP_KERNEL);
338 info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
340 goto name_alloc_fail;
343 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
347 add_resources(&info);
358 struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
360 struct acpi_device *device = root->device;
361 int domain = root->segment;
362 int busnum = root->secondary.start;
363 LIST_HEAD(resources);
365 struct pci_sysdata *sd;
367 #ifdef CONFIG_ACPI_NUMA
371 if (domain && !pci_domains_supported) {
372 printk(KERN_WARNING "pci_bus %04x:%02x: "
373 "ignored (multiple domains not supported)\n",
379 #ifdef CONFIG_ACPI_NUMA
380 pxm = acpi_get_pxm(device->handle);
382 node = pxm_to_node(pxm);
384 set_mp_bus_to_node(busnum, node);
387 node = get_mp_bus_to_node(busnum);
389 if (node != -1 && !node_online(node))
392 /* Allocate per-root-bus (not per bus) arch-specific data.
393 * TODO: leak; this memory is never freed.
394 * It's arguable whether it's worth the trouble to care.
396 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
398 printk(KERN_WARNING "pci_bus %04x:%02x: "
399 "ignored (out of memory)\n", domain, busnum);
406 * Maybe the desired pci bus has been already scanned. In such case
407 * it is unnecessary to scan the pci bus with the given domain,busnum.
409 bus = pci_find_bus(domain, busnum);
412 * If the desired bus exits, the content of bus->sysdata will
415 memcpy(bus->sysdata, sd, sizeof(*sd));
418 get_current_resources(device, busnum, domain, &resources);
421 * _CRS with no apertures is normal, so only fall back to
422 * defaults or native bridge info if we're ignoring _CRS.
425 x86_pci_root_bus_resources(busnum, &resources);
426 bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
429 bus->subordinate = pci_scan_child_bus(bus);
431 pci_free_resource_list(&resources);
434 /* After the PCI-E bus has been walked and all devices discovered,
435 * configure any settings of the fabric that might be necessary.
438 struct pci_bus *child;
439 list_for_each_entry(child, &bus->children, node) {
440 struct pci_dev *self = child->self;
444 pcie_bus_configure_settings(child, self->pcie_mpss);
451 if (bus && node != -1) {
452 #ifdef CONFIG_ACPI_NUMA
454 dev_printk(KERN_DEBUG, &bus->dev,
455 "on NUMA node %d (pxm %d)\n", node, pxm);
457 dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
464 int __init pci_acpi_init(void)
466 struct pci_dev *dev = NULL;
471 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
472 acpi_irq_penalty_init();
473 pcibios_enable_irq = acpi_pci_irq_enable;
474 pcibios_disable_irq = acpi_pci_irq_disable;
475 x86_init.pci.init_irq = x86_init_noop;
479 * PCI IRQ routing is set up by pci_enable_device(), but we
480 * also do it here in case there are still broken drivers that
481 * don't use pci_enable_device().
483 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
484 for_each_pci_dev(dev)
485 acpi_pci_irq_enable(dev);