1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/pci-acpi.h>
40 	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);  in set_ignore_seg()
48 	       id->ident);  in set_no_e820()
67 		.ident = "ASRock ALiveSATA2-GLAN",
69 			DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
76 		.ident = "ASUS M2V-MX SE",
79 			DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
86 		.ident = "MSI MS-7253",
88 			DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
89 			DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
93 	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
94 	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
97 		.ident = "Foxconn K8M890-8237A",
100 			DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
133 			DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"),
143 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
150 	 * an E820 reserved region that covers the entire 32-bit host
152 	 * _CRS means no space is available for hot-added or uninitialized
154 	 * and hot-added Thunderbolt devices.  See the commit log for
167 	 * The Acer Spin 5 (SP513-54N) has the same E820 reservation covering
168 	 * the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
173 		.ident = "Acer Spin 5 (SP513-54N)",
176 			DMI_MATCH(DMI_PRODUCT_NAME, "Spin SP513-54N"),
181 	 * Clevo X170KM-G barebones have the same E820 reservation covering
182 	 * the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
187 		.ident = "Clevo X170KM-G Barebone",
189 			DMI_MATCH(DMI_BOARD_NAME, "X170KM-G"),
197 	int year = dmi_get_bios_year();  in pci_acpi_crs_quirks()  local
199 	if (year >= 0 && year < 2008 && iomem_resource.end <= 0xffffffff)  in pci_acpi_crs_quirks()
211 	 * leaving none for hot-added or uninitialized devices.  These E820  in pci_acpi_crs_quirks()
213 	 * clipping by default for post-2022 machines.  in pci_acpi_crs_quirks()
215 	 * We already have quirks to disable clipping for pre-2023  in pci_acpi_crs_quirks()
217 	 * post-2022 machines that incorrectly include unusable space in  in pci_acpi_crs_quirks()
220 	if (year >= 2023)  in pci_acpi_crs_quirks()
248 …printk(KERN_INFO "PCI: Please notify linux-pci@vger.kernel.org so future kernels can this automati…  in pci_acpi_crs_quirks()
259 		return -EIO;  in check_segment()
279 	struct acpi_pci_root *root = ci->root;  in setup_mcfg_map()
280 	struct device *dev = &ci->bridge->dev;  in setup_mcfg_map()
283 	info->start_bus = (u8)root->secondary.start;  in setup_mcfg_map()
284 	info->end_bus = (u8)root->secondary.end;  in setup_mcfg_map()
285 	info->mcfg_added = false;  in setup_mcfg_map()
286 	seg = info->sd.domain;  in setup_mcfg_map()
295 	result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,  in setup_mcfg_map()
296 				     root->mcfg_addr);  in setup_mcfg_map()
301 		info->mcfg_added = true;  in setup_mcfg_map()
302 	} else if (result != -EEXIST)  in setup_mcfg_map()
314 	if (info->mcfg_added) {  in teardown_mcfg_map()
315 		pci_mmconfig_delete(info->sd.domain,  in teardown_mcfg_map()
316 				    info->start_bus, info->end_bus);  in teardown_mcfg_map()
317 		info->mcfg_added = false;  in teardown_mcfg_map()
333 	int busnum = root->secondary.start;  in pci_acpi_root_get_node()
334 	struct acpi_device *device = root->device;  in pci_acpi_root_get_node()
335 	int node = acpi_get_node(device->handle);  in pci_acpi_root_get_node()
340 …dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent…  in pci_acpi_root_get_node()
369  *     IO port [0xCF8-0xCFF] is consumed by the host bridge itself
372  * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
376 	return (res->flags & IORESOURCE_IO) &&  in resource_is_pcicfg_ioport()
377 		res->start == 0xCF8 && res->end == 0xCFF;  in resource_is_pcicfg_ioport()
382 	struct acpi_device *device = ci->bridge;  in pci_acpi_root_prepare_resources()
383 	int busnum = ci->root->secondary.start;  in pci_acpi_root_prepare_resources()
390 		resource_list_for_each_entry_safe(entry, tmp, &ci->resources)  in pci_acpi_root_prepare_resources()
391 			if (resource_is_pcicfg_ioport(entry->res))  in pci_acpi_root_prepare_resources()
396 	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {  in pci_acpi_root_prepare_resources()
397 		dev_printk(KERN_DEBUG, &device->dev,  in pci_acpi_root_prepare_resources()
398 			   "host bridge window %pR (ignored)\n", entry->res);  in pci_acpi_root_prepare_resources()
401 	x86_pci_root_bus_resources(busnum, &ci->resources);  in pci_acpi_root_prepare_resources()
415 	int domain = root->segment;  in pci_acpi_scan_root()
416 	int busnum = root->secondary.start;  in pci_acpi_scan_root()
421 		root->segment = domain = 0;  in pci_acpi_scan_root()
434 		 * its bus->sysdata.  in pci_acpi_scan_root()
439 			.companion = root->device  in pci_acpi_scan_root()
442 		memcpy(bus->sysdata, &sd, sizeof(sd));  in pci_acpi_scan_root()
448 			dev_err(&root->device->dev,  in pci_acpi_scan_root()
452 			info->sd.domain = domain;  in pci_acpi_scan_root()
453 			info->sd.node = node;  in pci_acpi_scan_root()
454 			info->sd.companion = root->device;  in pci_acpi_scan_root()
456 						   &info->common, &info->sd);  in pci_acpi_scan_root()
460 	/* After the PCI-E bus has been walked and all devices discovered,  in pci_acpi_scan_root()
465 		list_for_each_entry(child, &bus->children, node)  in pci_acpi_scan_root()
480 	if (!bridge->dev.parent) {  in pcibios_root_bridge_prepare()
481 		struct pci_sysdata *sd = bridge->bus->sysdata;  in pcibios_root_bridge_prepare()
482 		ACPI_COMPANION_SET(&bridge->dev, sd->companion);  in pcibios_root_bridge_prepare()
492 		return -ENODEV;  in pci_acpi_init()