1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/pci.h>
8 #include <linux/pci-acpi.h>
39 	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);  in set_ignore_seg()
58 		.ident = "ASRock ALiveSATA2-GLAN",
60 			DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
67 		.ident = "ASUS M2V-MX SE",
70 			DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
77 		.ident = "MSI MS-7253",
79 			DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
80 			DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
84 	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
85 	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
88 		.ident = "Foxconn K8M890-8237A",
91 			DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
124 			DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"),
134 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
151 	 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that  in pci_acpi_crs_quirks()
159 	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "  in pci_acpi_crs_quirks()
160 	       "if necessary, use \"pci=%s\" and report a bug\n",  in pci_acpi_crs_quirks()
170 			"%s can't access PCI configuration "  in check_segment()
173 		return -EIO;  in check_segment()
182 		 "%s can't access extended PCI configuration "  in check_segment()
193 	struct acpi_pci_root *root = ci->root;  in setup_mcfg_map()
194 	struct device *dev = &ci->bridge->dev;  in setup_mcfg_map()
197 	info->start_bus = (u8)root->secondary.start;  in setup_mcfg_map()
198 	info->end_bus = (u8)root->secondary.end;  in setup_mcfg_map()
199 	info->mcfg_added = false;  in setup_mcfg_map()
200 	seg = info->sd.domain;  in setup_mcfg_map()
209 	result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,  in setup_mcfg_map()
210 				     root->mcfg_addr);  in setup_mcfg_map()
215 		info->mcfg_added = true;  in setup_mcfg_map()
216 	} else if (result != -EEXIST)  in setup_mcfg_map()
228 	if (info->mcfg_added) {  in teardown_mcfg_map()
229 		pci_mmconfig_delete(info->sd.domain,  in teardown_mcfg_map()
230 				    info->start_bus, info->end_bus);  in teardown_mcfg_map()
231 		info->mcfg_added = false;  in teardown_mcfg_map()
247 	int busnum = root->secondary.start;  in pci_acpi_root_get_node()
248 	struct acpi_device *device = root->device;  in pci_acpi_root_get_node()
249 	int node = acpi_get_node(device->handle);  in pci_acpi_root_get_node()
254 …dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent…  in pci_acpi_root_get_node()
275  * An IO port or MMIO resource assigned to a PCI host bridge may be
283  *     IO port [0xCF8-0xCFF] is consumed by the host bridge itself
284  *     to access PCI configuration space.
286  * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
290 	return (res->flags & IORESOURCE_IO) &&  in resource_is_pcicfg_ioport()
291 		res->start == 0xCF8 && res->end == 0xCFF;  in resource_is_pcicfg_ioport()
296 	struct acpi_device *device = ci->bridge;  in pci_acpi_root_prepare_resources()
297 	int busnum = ci->root->secondary.start;  in pci_acpi_root_prepare_resources()
303 		resource_list_for_each_entry_safe(entry, tmp, &ci->resources)  in pci_acpi_root_prepare_resources()
304 			if (resource_is_pcicfg_ioport(entry->res))  in pci_acpi_root_prepare_resources()
309 	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {  in pci_acpi_root_prepare_resources()
310 		dev_printk(KERN_DEBUG, &device->dev,  in pci_acpi_root_prepare_resources()
311 			   "host bridge window %pR (ignored)\n", entry->res);  in pci_acpi_root_prepare_resources()
314 	x86_pci_root_bus_resources(busnum, &ci->resources);  in pci_acpi_root_prepare_resources()
328 	int domain = root->segment;  in pci_acpi_scan_root()  local
329 	int busnum = root->secondary.start;  in pci_acpi_scan_root()
334 		root->segment = domain = 0;  in pci_acpi_scan_root()
336 	if (domain && !pci_domains_supported) {  in pci_acpi_scan_root()
339 		       domain, busnum);  in pci_acpi_scan_root()
343 	bus = pci_find_bus(domain, busnum);  in pci_acpi_scan_root()
347 		 * its bus->sysdata.  in pci_acpi_scan_root()
350 			.domain = domain,  in pci_acpi_scan_root()
352 			.companion = root->device  in pci_acpi_scan_root()
355 		memcpy(bus->sysdata, &sd, sizeof(sd));  in pci_acpi_scan_root()
361 			dev_err(&root->device->dev,  in pci_acpi_scan_root()
363 				domain, busnum);  in pci_acpi_scan_root()
365 			info->sd.domain = domain;  in pci_acpi_scan_root()
366 			info->sd.node = node;  in pci_acpi_scan_root()
367 			info->sd.companion = root->device;  in pci_acpi_scan_root()
369 						   &info->common, &info->sd);  in pci_acpi_scan_root()
373 	/* After the PCI-E bus has been walked and all devices discovered,  in pci_acpi_scan_root()
378 		list_for_each_entry(child, &bus->children, node)  in pci_acpi_scan_root()
393 	if (!bridge->dev.parent) {  in pcibios_root_bridge_prepare()
394 		struct pci_sysdata *sd = bridge->bus->sysdata;  in pcibios_root_bridge_prepare()
395 		ACPI_COMPANION_SET(&bridge->dev, sd->companion);  in pcibios_root_bridge_prepare()
405 		return -ENODEV;  in pci_acpi_init()
407 	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");  in pci_acpi_init()
411 	x86_init.pci.init_irq = x86_init_noop;  in pci_acpi_init()
415 		 * PCI IRQ routing is set up by pci_enable_device(), but we  in pci_acpi_init()
419 …printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n…  in pci_acpi_init()