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drivers/acpi/pci_root.c
23.2 KB
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/* * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $) * * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * |
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/types.h> |
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#include <linux/mutex.h> |
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#include <linux/pm.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/pci.h> |
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#include <linux/pci-acpi.h> |
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#include <linux/pci-aspm.h> |
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#include <linux/dmar.h> |
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#include <linux/acpi.h> |
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#include <linux/slab.h> |
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#include <linux/dmi.h> |
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#include <acpi/apei.h> /* for acpi_hest_init() */ |
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|
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#include "internal.h" |
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#define _COMPONENT ACPI_PCI_COMPONENT |
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ACPI_MODULE_NAME("pci_root"); |
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#define ACPI_PCI_ROOT_CLASS "pci_bridge" |
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#define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
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static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used); static void acpi_pci_root_remove(struct acpi_device *device); |
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|
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static int acpi_pci_root_scan_dependent(struct acpi_device *adev) { |
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acpiphp_check_host_bridge(adev); |
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return 0; } |
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#define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \ | OSC_PCI_ASPM_SUPPORT \ | OSC_PCI_CLOCK_PM_SUPPORT \ | OSC_PCI_MSI_SUPPORT) |
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|
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static const struct acpi_device_id root_device_ids[] = { |
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{"PNP0A03", 0}, {"", 0}, }; |
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|
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static struct acpi_scan_handler pci_root_handler = { |
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.ids = root_device_ids, |
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.attach = acpi_pci_root_add, .detach = acpi_pci_root_remove, |
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.hotplug = { |
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.enabled = true, .scan_dependent = acpi_pci_root_scan_dependent, |
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}, |
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}; |
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static DEFINE_MUTEX(osc_lock); |
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|
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/** * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge * @handle - the ACPI CA node in question. * * Note: we could make this API take a struct acpi_device * instead, but * for now, it's more convenient to operate on an acpi_handle. */ int acpi_is_root_bridge(acpi_handle handle) { int ret; struct acpi_device *device; ret = acpi_bus_get_device(handle, &device); if (ret) return 0; ret = acpi_match_device_ids(device, root_device_ids); if (ret) return 0; else return 1; } EXPORT_SYMBOL_GPL(acpi_is_root_bridge); |
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static acpi_status |
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get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
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{ |
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struct resource *res = data; |
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struct acpi_resource_address64 address; |
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acpi_status status; |
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|
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status = acpi_resource_to_address64(resource, &address); if (ACPI_FAILURE(status)) |
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return AE_OK; |
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if ((address.address.address_length > 0) && |
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(address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
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res->start = address.address.minimum; res->end = address.address.minimum + address.address.address_length - 1; |
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} |
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return AE_OK; } |
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static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
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struct resource *res) |
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{ acpi_status status; |
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res->start = -1; |
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status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
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get_root_bridge_busnr_callback, res); |
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if (ACPI_FAILURE(status)) return status; |
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if (res->start == -1) |
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return AE_ERROR; return AE_OK; } |
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struct pci_osc_bit_struct { u32 bit; char *desc; }; static struct pci_osc_bit_struct pci_osc_support_bit[] = { { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" }, { OSC_PCI_ASPM_SUPPORT, "ASPM" }, { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" }, { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" }, { OSC_PCI_MSI_SUPPORT, "MSI" }, }; static struct pci_osc_bit_struct pci_osc_control_bit[] = { { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" }, { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" }, { OSC_PCI_EXPRESS_PME_CONTROL, "PME" }, { OSC_PCI_EXPRESS_AER_CONTROL, "AER" }, { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" }, }; static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word, struct pci_osc_bit_struct *table, int size) { char buf[80]; int i, len = 0; struct pci_osc_bit_struct *entry; buf[0] = '\0'; for (i = 0, entry = table; i < size; i++, entry++) if (word & entry->bit) len += snprintf(buf + len, sizeof(buf) - len, "%s%s", len ? " " : "", entry->desc); dev_info(&root->device->dev, "_OSC: %s [%s] ", msg, buf); } static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word) { decode_osc_bits(root, msg, word, pci_osc_support_bit, ARRAY_SIZE(pci_osc_support_bit)); } static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word) { decode_osc_bits(root, msg, word, pci_osc_control_bit, ARRAY_SIZE(pci_osc_control_bit)); } |
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static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
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static acpi_status acpi_pci_run_osc(acpi_handle handle, const u32 *capbuf, u32 *retval) { |
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struct acpi_osc_context context = { .uuid_str = pci_osc_uuid_str, .rev = 1, .cap.length = 12, .cap.pointer = (void *)capbuf, }; |
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acpi_status status; |
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|
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status = acpi_run_osc(handle, &context); if (ACPI_SUCCESS(status)) { *retval = *((u32 *)(context.ret.pointer + 8)); kfree(context.ret.pointer); |
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} |
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return status; } |
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static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 support, u32 *control) |
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{ acpi_status status; |
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u32 result, capbuf[3]; support &= OSC_PCI_SUPPORT_MASKS; support |= root->osc_support_set; |
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|
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capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_DWORD] = support; |
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if (control) { *control &= OSC_PCI_CONTROL_MASKS; |
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capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set; |
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} else { |
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/* Run _OSC query only with existing controls. */ |
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capbuf[OSC_CONTROL_DWORD] = root->osc_control_set; |
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} |
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status = acpi_pci_run_osc(root->device->handle, capbuf, &result); if (ACPI_SUCCESS(status)) { |
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root->osc_support_set = support; |
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if (control) |
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*control = result; |
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} return status; } static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) { acpi_status status; |
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|
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mutex_lock(&osc_lock); |
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status = acpi_pci_query_osc(root, flags, NULL); |
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mutex_unlock(&osc_lock); return status; } |
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struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
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{ struct acpi_pci_root *root; |
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struct acpi_device *device; |
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|
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if (acpi_bus_get_device(handle, &device) || acpi_match_device_ids(device, root_device_ids)) return NULL; root = acpi_driver_data(device); return root; |
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} |
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EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
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|
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struct acpi_handle_node { struct list_head node; acpi_handle handle; }; /** * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev * @handle: the handle in question * * Given an ACPI CA handle, the desired PCI device is located in the * list of PCI devices. * * If the device is found, its reference count is increased and this * function returns a pointer to its data structure. The caller must * decrement the reference count by calling pci_dev_put(). * If no device is found, %NULL is returned. */ struct pci_dev *acpi_get_pci_dev(acpi_handle handle) { int dev, fn; unsigned long long adr; acpi_status status; acpi_handle phandle; struct pci_bus *pbus; struct pci_dev *pdev = NULL; struct acpi_handle_node *node, *tmp; struct acpi_pci_root *root; LIST_HEAD(device_list); /* * Walk up the ACPI CA namespace until we reach a PCI root bridge. */ phandle = handle; while (!acpi_is_root_bridge(phandle)) { node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); if (!node) goto out; INIT_LIST_HEAD(&node->node); node->handle = phandle; list_add(&node->node, &device_list); status = acpi_get_parent(phandle, &phandle); if (ACPI_FAILURE(status)) goto out; } root = acpi_pci_find_root(phandle); if (!root) goto out; pbus = root->bus; /* * Now, walk back down the PCI device tree until we return to our * original handle. Assumes that everything between the PCI root * bridge and the device we're looking for must be a P2P bridge. */ list_for_each_entry(node, &device_list, node) { acpi_handle hnd = node->handle; status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); if (ACPI_FAILURE(status)) goto out; dev = (adr >> 16) & 0xffff; fn = adr & 0xffff; pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); |
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if (!pdev || hnd == handle) |
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break; pbus = pdev->subordinate; pci_dev_put(pdev); |
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/* * This function may be called for a non-PCI device that has a * PCI parent (eg. a disk under a PCI SATA controller). In that * case pdev->subordinate will be NULL for the parent. */ if (!pbus) { dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge "); pdev = NULL; break; } |
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} out: list_for_each_entry_safe(node, tmp, &device_list, node) kfree(node); return pdev; } EXPORT_SYMBOL_GPL(acpi_get_pci_dev); |
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/** |
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* acpi_pci_osc_control_set - Request control of PCI root _OSC features. * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). * @mask: Mask of _OSC bits to request control of, place to store control mask. * @req: Mask of _OSC bits the control of is essential to the caller. |
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* |
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* Run _OSC query for @mask and if that is successful, compare the returned * mask of control bits with @req. If all of the @req bits are set in the * returned mask, run _OSC request for it. * * The variable at the @mask address may be modified regardless of whether or * not the function returns success. On success it will contain the mask of * _OSC bits the BIOS has granted control of, but its contents are meaningless * on failure. |
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**/ |
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acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
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{ |
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struct acpi_pci_root *root; |
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acpi_status status = AE_OK; |
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u32 ctrl, capbuf[3]; |
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|
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if (!mask) return AE_BAD_PARAMETER; ctrl = *mask & OSC_PCI_CONTROL_MASKS; if ((ctrl & req) != req) |
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return AE_TYPE; root = acpi_pci_find_root(handle); if (!root) return AE_NOT_EXIST; mutex_lock(&osc_lock); |
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*mask = ctrl | root->osc_control_set; |
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/* No need to evaluate _OSC if the control was already granted. */ |
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if ((root->osc_control_set & ctrl) == ctrl) |
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goto out; |
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/* Need to check the available controls bits before requesting them. */ while (*mask) { status = acpi_pci_query_osc(root, root->osc_support_set, mask); if (ACPI_FAILURE(status)) goto out; if (ctrl == *mask) break; |
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decode_osc_control(root, "platform does not support", ctrl & ~(*mask)); |
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ctrl = *mask; } |
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|
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if ((ctrl & req) != req) { |
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decode_osc_control(root, "not requesting control; platform does not support", req & ~(ctrl)); |
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status = AE_SUPPORT; goto out; } |
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capbuf[OSC_QUERY_DWORD] = 0; capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set; capbuf[OSC_CONTROL_DWORD] = ctrl; |
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status = acpi_pci_run_osc(handle, capbuf, mask); |
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if (ACPI_SUCCESS(status)) |
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root->osc_control_set = *mask; |
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out: mutex_unlock(&osc_lock); return status; } |
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EXPORT_SYMBOL(acpi_pci_osc_control_set); |
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|
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static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm) |
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{ |
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u32 support, control, requested; |
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acpi_status status; struct acpi_device *device = root->device; |
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acpi_handle handle = device->handle; |
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|
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/* |
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* Apple always return failure on _OSC calls when _OSI("Darwin") has * been called successfully. We know the feature set supported by the * platform, so avoid calling _OSC at all */ if (dmi_match(DMI_SYS_VENDOR, "Apple Inc.")) { root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL; decode_osc_control(root, "OS assumes control of", root->osc_control_set); return; } /* |
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* All supported architectures that use ACPI have support for * PCI domains, so we indicate this in _OSC support capabilities. |
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*/ |
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support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
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if (pci_ext_cfg_avail()) |
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support |= OSC_PCI_EXT_CONFIG_SUPPORT; |
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if (pcie_aspm_support_enabled()) |
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support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT; |
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if (pci_msi_enabled()) |
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support |= OSC_PCI_MSI_SUPPORT; |
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decode_osc_support(root, "OS supports", support); |
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status = acpi_pci_osc_support(root, support); if (ACPI_FAILURE(status)) { |
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dev_info(&device->dev, "_OSC failed (%s); disabling ASPM ", acpi_format_exception(status)); |
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*no_aspm = 1; |
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return; |
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} |
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|
43613a1fa PCI/ACPI: Separat... |
452 453 454 455 456 |
if (pcie_ports_disabled) { dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control "); return; } |
de1896622 PCI/ACPI: Separat... |
457 |
if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) { |
955f14b4e PCI/ACPI: Decode ... |
458 459 |
decode_osc_support(root, "not requesting OS control; OS requires", ACPI_PCIE_REQ_SUPPORT); |
de1896622 PCI/ACPI: Separat... |
460 461 462 463 464 465 466 467 468 |
return; } control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | OSC_PCI_EXPRESS_PME_CONTROL; if (pci_aer_available()) { if (aer_acpi_firmware_first()) |
955f14b4e PCI/ACPI: Decode ... |
469 470 471 |
dev_info(&device->dev, "PCIe AER handled by firmware "); |
de1896622 PCI/ACPI: Separat... |
472 473 474 |
else control |= OSC_PCI_EXPRESS_AER_CONTROL; } |
415e12b23 PCI/ACPI: Request... |
475 |
|
955f14b4e PCI/ACPI: Decode ... |
476 |
requested = control; |
de1896622 PCI/ACPI: Separat... |
477 478 479 |
status = acpi_pci_osc_control_set(handle, &control, OSC_PCI_EXPRESS_CAPABILITY_CONTROL); if (ACPI_SUCCESS(status)) { |
955f14b4e PCI/ACPI: Decode ... |
480 |
decode_osc_control(root, "OS now controls", control); |
de1896622 PCI/ACPI: Separat... |
481 |
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
3dc48af31 PCI/ACPI: Fix _OS... |
482 |
/* |
387d37577 PCI: Don't clear ... |
483 484 485 |
* We have ASPM control, but the FADT indicates that * it's unsupported. Leave existing configuration * intact and prevent the OS from touching it. |
3dc48af31 PCI/ACPI: Fix _OS... |
486 |
*/ |
387d37577 PCI: Don't clear ... |
487 488 489 |
dev_info(&device->dev, "FADT indicates ASPM is unsupported, using BIOS configuration "); *no_aspm = 1; |
eca67315e PCI: Disable ASPM... |
490 |
} |
a246670dd PCI/ACPI: Report ... |
491 |
} else { |
955f14b4e PCI/ACPI: Decode ... |
492 493 494 495 496 |
decode_osc_control(root, "OS requested", requested); decode_osc_control(root, "platform willing to grant", control); dev_info(&device->dev, "_OSC failed (%s); disabling ASPM ", acpi_format_exception(status)); |
de1896622 PCI/ACPI: Separat... |
497 498 499 500 501 502 503 504 |
/* * We want to disable ASPM here, but aspm_disabled * needs to remain in its state from boot so that we * properly handle PCIe 1.1 devices. So we set this * flag here, to defer the action until after the ACPI * root scan. */ *no_aspm = 1; |
415e12b23 PCI/ACPI: Request... |
505 |
} |
3e43abb01 PCI/ACPI: Move _O... |
506 |
} |
00c43b968 ACPI / PCI: Make ... |
507 508 |
static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used) |
1da177e4c Linux-2.6.12-rc2 |
509 |
{ |
f5eebbe11 ACPI: pci_root: s... |
510 511 512 513 |
unsigned long long segment, bus; acpi_status status; int result; struct acpi_pci_root *root; |
bfe2414ae PCI/ACPI: Introdu... |
514 |
acpi_handle handle = device->handle; |
387d37577 PCI: Don't clear ... |
515 |
int no_aspm = 0; |
864b94adf pci, ACPI, iommu:... |
516 |
bool hotadd = system_state != SYSTEM_BOOTING; |
1da177e4c Linux-2.6.12-rc2 |
517 |
|
6ad95513d ACPI: pci_root: s... |
518 519 520 |
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); if (!root) return -ENOMEM; |
f5eebbe11 ACPI: pci_root: s... |
521 |
segment = 0; |
bfe2414ae PCI/ACPI: Introdu... |
522 |
status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, |
f5eebbe11 ACPI: pci_root: s... |
523 524 |
&segment); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
6dc7d22c6 PCI/ACPI: Use dev... |
525 526 |
dev_err(&device->dev, "can't evaluate _SEG "); |
6ad95513d ACPI: pci_root: s... |
527 528 |
result = -ENODEV; goto end; |
f5eebbe11 ACPI: pci_root: s... |
529 |
} |
1da177e4c Linux-2.6.12-rc2 |
530 |
|
f5eebbe11 ACPI: pci_root: s... |
531 |
/* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
6ad95513d ACPI: pci_root: s... |
532 |
root->secondary.flags = IORESOURCE_BUS; |
bfe2414ae PCI/ACPI: Introdu... |
533 |
status = try_get_root_bridge_busnr(handle, &root->secondary); |
f5eebbe11 ACPI: pci_root: s... |
534 |
if (ACPI_FAILURE(status)) { |
6ad95513d ACPI: pci_root: s... |
535 536 537 538 539 540 541 |
/* * We need both the start and end of the downstream bus range * to interpret _CBA (MMCONFIG base address), so it really is * supposed to be in _CRS. If we don't find it there, all we * can do is assume [_BBN-0xFF] or [0-0xFF]. */ root->secondary.end = 0xFF; |
6dc7d22c6 PCI/ACPI: Use dev... |
542 543 544 |
dev_warn(&device->dev, FW_BUG "no secondary bus range in _CRS "); |
bfe2414ae PCI/ACPI: Introdu... |
545 |
status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, |
e545b55a1 ACPI: fix 80 char... |
546 |
NULL, &bus); |
6ad95513d ACPI: pci_root: s... |
547 548 549 550 551 |
if (ACPI_SUCCESS(status)) root->secondary.start = bus; else if (status == AE_NOT_FOUND) root->secondary.start = 0; else { |
6dc7d22c6 PCI/ACPI: Use dev... |
552 553 |
dev_err(&device->dev, "can't evaluate _BBN "); |
6ad95513d ACPI: pci_root: s... |
554 555 |
result = -ENODEV; goto end; |
f5eebbe11 ACPI: pci_root: s... |
556 557 |
} } |
1da177e4c Linux-2.6.12-rc2 |
558 |
|
32917e5b5 ACPI: pci root: a... |
559 |
root->device = device; |
0705495d9 ACPI: pci_root: r... |
560 |
root->segment = segment & 0xFFFF; |
1da177e4c Linux-2.6.12-rc2 |
561 562 |
strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); |
db89b4f0d ACPI: catch calls... |
563 |
device->driver_data = root; |
1da177e4c Linux-2.6.12-rc2 |
564 |
|
864b94adf pci, ACPI, iommu:... |
565 566 567 568 |
if (hotadd && dmar_device_add(handle)) { result = -ENXIO; goto end; } |
6dc7d22c6 PCI/ACPI: Use dev... |
569 570 |
pr_info(PREFIX "%s [%s] (domain %04x %pR) ", |
4be44fcd3 [ACPI] Lindent al... |
571 |
acpi_device_name(device), acpi_device_bid(device), |
6ad95513d ACPI: pci_root: s... |
572 |
root->segment, &root->secondary); |
1da177e4c Linux-2.6.12-rc2 |
573 |
|
bfe2414ae PCI/ACPI: Introdu... |
574 |
root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle); |
1da177e4c Linux-2.6.12-rc2 |
575 |
|
387d37577 PCI: Don't clear ... |
576 |
negotiate_os_control(root, &no_aspm); |
415e12b23 PCI/ACPI: Request... |
577 |
|
3dc48af31 PCI/ACPI: Fix _OS... |
578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 |
/* * TBD: Need PCI interface for enumeration/configuration of roots. */ /* * Scan the Root Bridge * -------------------- * Must do this prior to any attempt to bind the root device, as the * PCI namespace does not get created until this call is made (and * thus the root bridge's pci_dev does not exist). */ root->bus = pci_acpi_scan_root(root); if (!root->bus) { dev_err(&device->dev, "Bus %04x:%02x not present in PCI namespace ", root->segment, (unsigned int)root->secondary.start); |
f516bde51 ACPI / PCI root: ... |
595 |
device->driver_data = NULL; |
3dc48af31 PCI/ACPI: Fix _OS... |
596 |
result = -ENODEV; |
864b94adf pci, ACPI, iommu:... |
597 |
goto remove_dmar; |
3dc48af31 PCI/ACPI: Fix _OS... |
598 |
} |
3dc48af31 PCI/ACPI: Fix _OS... |
599 600 |
if (no_aspm) pcie_no_aspm(); |
c072530f3 ACPI / PM: Revork... |
601 |
pci_acpi_add_bus_pm_notifier(device); |
b67ea7617 PCI / ACPI / PM: ... |
602 603 |
if (device->wakeup.flags.run_wake) device_set_run_wake(root->bus->bridge, true); |
864b94adf pci, ACPI, iommu:... |
604 |
if (hotadd) { |
3c449ed00 PCI/ACPI: Reserve... |
605 |
pcibios_resource_survey_bus(root->bus); |
39772038e PCI: Assign resou... |
606 |
pci_assign_unassigned_root_bus_resources(root->bus); |
c183619b6 x86/irq, ACPI: Im... |
607 |
acpi_ioapic_add(root); |
516ca2230 PCI/ACPI: Combine... |
608 |
} |
62a08c5a3 PCI/ACPI: Assign ... |
609 |
|
7a3bb55eb ACPI / PCI: Use g... |
610 |
pci_lock_rescan_remove(); |
caf420c68 ACPI: pci_root: u... |
611 |
pci_bus_add_devices(root->bus); |
7a3bb55eb ACPI / PCI: Use g... |
612 |
pci_unlock_rescan_remove(); |
00c43b968 ACPI / PCI: Make ... |
613 |
return 1; |
47525cda8 ACPI / PCI: Fold ... |
614 |
|
864b94adf pci, ACPI, iommu:... |
615 616 617 |
remove_dmar: if (hotadd) dmar_device_remove(handle); |
47525cda8 ACPI / PCI: Fold ... |
618 619 620 |
end: kfree(root); return result; |
c431ada45 [PATCH] acpi brid... |
621 |
} |
1da177e4c Linux-2.6.12-rc2 |
622 |
|
00c43b968 ACPI / PCI: Make ... |
623 |
static void acpi_pci_root_remove(struct acpi_device *device) |
1da177e4c Linux-2.6.12-rc2 |
624 |
{ |
caf420c68 ACPI: pci_root: u... |
625 |
struct acpi_pci_root *root = acpi_driver_data(device); |
c8e9afb12 PCI/ACPI: Notify ... |
626 |
|
7a3bb55eb ACPI / PCI: Use g... |
627 |
pci_lock_rescan_remove(); |
9738a1fd2 PCI/ACPI: Make ac... |
628 |
pci_stop_root_bus(root->bus); |
c183619b6 x86/irq, ACPI: Im... |
629 |
WARN_ON(acpi_ioapic_remove(root)); |
b67ea7617 PCI / ACPI / PM: ... |
630 631 |
device_set_run_wake(root->bus->bridge, false); pci_acpi_remove_bus_pm_notifier(device); |
9738a1fd2 PCI/ACPI: Make ac... |
632 |
pci_remove_root_bus(root->bus); |
864b94adf pci, ACPI, iommu:... |
633 |
dmar_device_remove(device->handle); |
7a3bb55eb ACPI / PCI: Use g... |
634 |
pci_unlock_rescan_remove(); |
1da177e4c Linux-2.6.12-rc2 |
635 |
kfree(root); |
1da177e4c Linux-2.6.12-rc2 |
636 |
} |
2c204383a PCI/ACPI: Add int... |
637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 |
/* * Following code to support acpi_pci_root_create() is copied from * arch/x86/pci/acpi.c and modified so it could be reused by x86, IA64 * and ARM64. */ static void acpi_pci_root_validate_resources(struct device *dev, struct list_head *resources, unsigned long type) { LIST_HEAD(list); struct resource *res1, *res2, *root = NULL; struct resource_entry *tmp, *entry, *entry2; BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0); root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource; list_splice_init(resources, &list); resource_list_for_each_entry_safe(entry, tmp, &list) { bool free = false; resource_size_t end; res1 = entry->res; if (!(res1->flags & type)) goto next; /* Exclude non-addressable range or non-addressable portion */ end = min(res1->end, root->end); if (end <= res1->start) { dev_info(dev, "host bridge window %pR (ignored, not CPU addressable) ", res1); free = true; goto next; } else if (res1->end != end) { dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable) ", res1, (unsigned long long)end + 1, (unsigned long long)res1->end); res1->end = end; } resource_list_for_each_entry(entry2, resources) { res2 = entry2->res; if (!(res2->flags & type)) continue; /* * I don't like throwing away windows because then * our resources no longer match the ACPI _CRS, but * the kernel resource tree doesn't allow overlaps. */ if (resource_overlaps(res1, res2)) { res2->start = min(res1->start, res2->start); res2->end = max(res1->end, res2->end); dev_info(dev, "host bridge window expanded to %pR; %pR ignored ", res2, res1); free = true; goto next; } } next: resource_list_del(entry); if (free) resource_list_free_entry(entry); else resource_list_add_tail(entry, resources); } } int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info) { int ret; struct list_head *list = &info->resources; struct acpi_device *device = info->bridge; struct resource_entry *entry, *tmp; unsigned long flags; flags = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_MEM_8AND16BIT; ret = acpi_dev_get_resources(device, list, acpi_dev_filter_resource_type_cb, (void *)flags); if (ret < 0) dev_warn(&device->dev, "failed to parse _CRS method, error code %d ", ret); else if (ret == 0) dev_dbg(&device->dev, "no IO and memory resources present in _CRS "); else { resource_list_for_each_entry_safe(entry, tmp, list) { if (entry->res->flags & IORESOURCE_DISABLED) resource_list_destroy_entry(entry); else entry->res->name = info->name; } acpi_pci_root_validate_resources(&device->dev, list, IORESOURCE_MEM); acpi_pci_root_validate_resources(&device->dev, list, IORESOURCE_IO); } return ret; } static void pci_acpi_root_add_resources(struct acpi_pci_root_info *info) { struct resource_entry *entry, *tmp; struct resource *res, *conflict, *root = NULL; resource_list_for_each_entry_safe(entry, tmp, &info->resources) { res = entry->res; if (res->flags & IORESOURCE_MEM) root = &iomem_resource; else if (res->flags & IORESOURCE_IO) root = &ioport_resource; else continue; |
727ae8be3 x86/PCI/ACPI: Fix... |
757 758 759 760 761 762 |
/* * Some legacy x86 host bridge drivers use iomem_resource and * ioport_resource as default resource pool, skip it. */ if (res == root) continue; |
2c204383a PCI/ACPI: Add int... |
763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 |
conflict = insert_resource_conflict(root, res); if (conflict) { dev_info(&info->bridge->dev, "ignoring host bridge window %pR (conflicts with %s %pR) ", res, conflict->name, conflict); resource_list_destroy_entry(entry); } } } static void __acpi_pci_root_release_info(struct acpi_pci_root_info *info) { struct resource *res; struct resource_entry *entry, *tmp; if (!info) return; resource_list_for_each_entry_safe(entry, tmp, &info->resources) { res = entry->res; if (res->parent && (res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) release_resource(res); resource_list_destroy_entry(entry); } info->ops->release_info(info); } static void acpi_pci_root_release_info(struct pci_host_bridge *bridge) { struct resource *res; struct resource_entry *entry; resource_list_for_each_entry(entry, &bridge->windows) { res = entry->res; if (res->parent && (res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) release_resource(res); } __acpi_pci_root_release_info(bridge->release_data); } struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, struct acpi_pci_root_ops *ops, struct acpi_pci_root_info *info, void *sysdata) { int ret, busnum = root->secondary.start; struct acpi_device *device = root->device; int node = acpi_get_node(device->handle); struct pci_bus *bus; info->root = root; info->bridge = device; info->ops = ops; INIT_LIST_HEAD(&info->resources); snprintf(info->name, sizeof(info->name), "PCI Bus %04x:%02x", root->segment, busnum); if (ops->init_info && ops->init_info(info)) goto out_release_info; if (ops->prepare_resources) ret = ops->prepare_resources(info); else ret = acpi_pci_probe_root_resources(info); if (ret < 0) goto out_release_info; pci_acpi_root_add_resources(info); pci_add_resource(&info->resources, &root->secondary); bus = pci_create_root_bus(NULL, busnum, ops->pci_ops, sysdata, &info->resources); if (!bus) goto out_release_info; pci_scan_child_bus(bus); pci_set_host_bridge_release(to_pci_host_bridge(bus->bridge), acpi_pci_root_release_info, info); if (node != NUMA_NO_NODE) dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d ", node); return bus; out_release_info: __acpi_pci_root_release_info(info); return NULL; } |
00c43b968 ACPI / PCI: Make ... |
852 |
void __init acpi_pci_root_init(void) |
1da177e4c Linux-2.6.12-rc2 |
853 |
{ |
d3072e6a7 ACPI: Fix boot pr... |
854 |
acpi_hest_init(); |
3338db005 ACPI / hotplug: M... |
855 |
if (acpi_pci_disabled) |
668192b67 PCI: acpiphp: Mov... |
856 |
return; |
668192b67 PCI: acpiphp: Mov... |
857 |
|
3338db005 ACPI / hotplug: M... |
858 859 |
pci_acpi_crs_quirks(); acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root"); |
668192b67 PCI: acpiphp: Mov... |
860 |
} |