11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $) 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or (at 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * your option) any later version. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * General Public License for more details. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License along 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with this program; if not, write to the Free Software Foundation, Inc., 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 30d0020f65220c237f300355873125df5efe2c2740Taku Izumi#include <linux/mutex.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pm.h> 32b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki#include <linux/pm_runtime.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 34990a7ac5645883a833a11b900bb6f25b65dea65bAndrew Patterson#include <linux/pci-acpi.h> 35eca67315e0e0d5fd91264d79c88694006dbc7d31Naga Chumbalkar#include <linux/pci-aspm.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/acpi.h> 375a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 387bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett#include <linux/dmi.h> 398b48463f89429af408ff695244dc627e1acff4f7Lv Zheng#include <acpi/apei.h> /* for acpi_hest_init() */ 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41ace8238b00eafd493b8dbcc7db813ed72b8b6e87Rafael J. Wysocki#include "internal.h" 42ace8238b00eafd493b8dbcc7db813ed72b8b6e87Rafael J. Wysocki 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _COMPONENT ACPI_PCI_COMPONENT 44f52fd66d2ea794010c2d7536cf8e6abed0ac4947Len BrownACPI_MODULE_NAME("pci_root"); 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ACPI_PCI_ROOT_CLASS "pci_bridge" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" 4700c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockistatic int acpi_pci_root_add(struct acpi_device *device, 4800c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysocki const struct acpi_device_id *not_used); 4900c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockistatic void acpi_pci_root_remove(struct acpi_device *device); 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 513338db0057ed9f554050bd06863731c515d79672Rafael J. Wysockistatic int acpi_pci_root_scan_dependent(struct acpi_device *adev) 523338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki{ 531f7c164b6f2a8a028bfc36097fc42bf061c5212eRafael J. Wysocki acpiphp_check_host_bridge(adev); 543338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki return 0; 553338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki} 563338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki 577dab9ef4f0823072a3c9afdb3b373c9f2f38848bBjorn Helgaas#define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \ 587dab9ef4f0823072a3c9afdb3b373c9f2f38848bBjorn Helgaas | OSC_PCI_ASPM_SUPPORT \ 597dab9ef4f0823072a3c9afdb3b373c9f2f38848bBjorn Helgaas | OSC_PCI_CLOCK_PM_SUPPORT \ 607dab9ef4f0823072a3c9afdb3b373c9f2f38848bBjorn Helgaas | OSC_PCI_MSI_SUPPORT) 61415e12b2379239973feab91850b0dce985c6058aRafael J. Wysocki 62c97adf9e7bebf17a86b95e2131bf9ba76c4857c7Márton Némethstatic const struct acpi_device_id root_device_ids[] = { 631ba90e3a87c46500623afdc3898573e4a5ebb21bThomas Renninger {"PNP0A03", 0}, 641ba90e3a87c46500623afdc3898573e4a5ebb21bThomas Renninger {"", 0}, 651ba90e3a87c46500623afdc3898573e4a5ebb21bThomas Renninger}; 661ba90e3a87c46500623afdc3898573e4a5ebb21bThomas Renninger 6700c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockistatic struct acpi_scan_handler pci_root_handler = { 681ba90e3a87c46500623afdc3898573e4a5ebb21bThomas Renninger .ids = root_device_ids, 6900c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysocki .attach = acpi_pci_root_add, 7000c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysocki .detach = acpi_pci_root_remove, 71ca499fc87ed945094d952da0eb7eea7dbeb1feecToshi Kani .hotplug = { 723338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki .enabled = true, 733338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki .scan_dependent = acpi_pci_root_scan_dependent, 74ca499fc87ed945094d952da0eb7eea7dbeb1feecToshi Kani }, 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshigestatic DEFINE_MUTEX(osc_lock); 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 79275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang/** 80275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge 81275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang * @handle - the ACPI CA node in question. 82275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang * 83275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang * Note: we could make this API take a struct acpi_device * instead, but 84275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang * for now, it's more convenient to operate on an acpi_handle. 85275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang */ 86275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiangint acpi_is_root_bridge(acpi_handle handle) 87275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang{ 88275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang int ret; 89275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang struct acpi_device *device; 90275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang 91275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang ret = acpi_bus_get_device(handle, &device); 92275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang if (ret) 93275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang return 0; 94275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang 95275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang ret = acpi_match_device_ids(device, root_device_ids); 96275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang if (ret) 97275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang return 0; 98275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang else 99275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang return 1; 100275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang} 101275582031f9b3597a1b973f3ff617adfe639faa2Alexander ChiangEXPORT_SYMBOL_GPL(acpi_is_root_bridge); 102275582031f9b3597a1b973f3ff617adfe639faa2Alexander Chiang 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic acpi_status 1044be44fcd3bf648b782f4460fd06dfae6c42ded4bLen Brownget_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1066ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas struct resource *res = data; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct acpi_resource_address64 address; 108f6c1c8ff439ccadc333b3920c7073e0792bcb9afBjorn Helgaas acpi_status status; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 110f6c1c8ff439ccadc333b3920c7073e0792bcb9afBjorn Helgaas status = acpi_resource_to_address64(resource, &address); 111f6c1c8ff439ccadc333b3920c7073e0792bcb9afBjorn Helgaas if (ACPI_FAILURE(status)) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return AE_OK; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1144be44fcd3bf648b782f4460fd06dfae6c42ded4bLen Brown if ((address.address_length > 0) && 1156ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { 1166ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas res->start = address.minimum; 1176ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas res->end = address.minimum + address.address_length - 1; 1186ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas } 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return AE_OK; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 123f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaasstatic acpi_status try_get_root_bridge_busnr(acpi_handle handle, 1246ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas struct resource *res) 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acpi_status status; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1286ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas res->start = -1; 1294be44fcd3bf648b782f4460fd06dfae6c42ded4bLen Brown status = 1304be44fcd3bf648b782f4460fd06dfae6c42ded4bLen Brown acpi_walk_resources(handle, METHOD_NAME__CRS, 1316ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas get_root_bridge_busnr_callback, res); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ACPI_FAILURE(status)) 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 1346ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas if (res->start == -1) 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return AE_ERROR; 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return AE_OK; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 139955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstruct pci_osc_bit_struct { 140955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas u32 bit; 141955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas char *desc; 142955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas}; 143955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 144955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstatic struct pci_osc_bit_struct pci_osc_support_bit[] = { 145955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" }, 146955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_ASPM_SUPPORT, "ASPM" }, 147955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" }, 148955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" }, 149955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_MSI_SUPPORT, "MSI" }, 150955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas}; 151955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 152955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstatic struct pci_osc_bit_struct pci_osc_control_bit[] = { 153955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" }, 154955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" }, 155955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_EXPRESS_PME_CONTROL, "PME" }, 156955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_EXPRESS_AER_CONTROL, "AER" }, 157955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" }, 158955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas}; 159955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 160955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstatic void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word, 161955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas struct pci_osc_bit_struct *table, int size) 162955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas{ 163955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas char buf[80]; 164955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas int i, len = 0; 165955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas struct pci_osc_bit_struct *entry; 166955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 167955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas buf[0] = '\0'; 168955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas for (i = 0, entry = table; i < size; i++, entry++) 169955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas if (word & entry->bit) 170955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas len += snprintf(buf + len, sizeof(buf) - len, "%s%s", 171955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas len ? " " : "", entry->desc); 172955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 173955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf); 174955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas} 175955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 176955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstatic void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word) 177955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas{ 178955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_bits(root, msg, word, pci_osc_support_bit, 179955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas ARRAY_SIZE(pci_osc_support_bit)); 180955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas} 181955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 182955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaasstatic void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word) 183955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas{ 184955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_bits(root, msg, word, pci_osc_control_bit, 185955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas ARRAY_SIZE(pci_osc_control_bit)); 186955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas} 187955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 1883a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Listatic u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; 18963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 19063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshigestatic acpi_status acpi_pci_run_osc(acpi_handle handle, 19163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige const u32 *capbuf, u32 *retval) 19263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige{ 1933a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li struct acpi_osc_context context = { 1943a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li .uuid_str = pci_osc_uuid_str, 1953a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li .rev = 1, 1963a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li .cap.length = 12, 1973a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li .cap.pointer = (void *)capbuf, 1983a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li }; 19963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige acpi_status status; 20063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 2013a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li status = acpi_run_osc(handle, &context); 2023a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li if (ACPI_SUCCESS(status)) { 2033a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li *retval = *((u32 *)(context.ret.pointer + 8)); 2043a9622dc4659af44a8098a233f65c51e495ff0a5Shaohua Li kfree(context.ret.pointer); 20563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige } 20663f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return status; 20763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige} 20863f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 209ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysockistatic acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, 210ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki u32 support, 211ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki u32 *control) 21263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige{ 21363f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige acpi_status status; 214ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki u32 result, capbuf[3]; 215ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki 216ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki support &= OSC_PCI_SUPPORT_MASKS; 217ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki support |= root->osc_support_set; 21863f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 219b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; 220b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_SUPPORT_DWORD] = support; 221ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki if (control) { 222ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki *control &= OSC_PCI_CONTROL_MASKS; 223b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set; 224ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki } else { 225545d6e189a41c94c11f55045a771118eccc9d9ebYinghai Lu /* Run _OSC query only with existing controls. */ 226b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_CONTROL_DWORD] = root->osc_control_set; 227ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki } 22863f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 22963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige status = acpi_pci_run_osc(root->device->handle, capbuf, &result); 23063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige if (ACPI_SUCCESS(status)) { 231ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki root->osc_support_set = support; 2322b8fd9186d9275b07aef43e5bb4e98cd571f9a7dRafael J. Wysocki if (control) 233ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki *control = result; 23463f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige } 23563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return status; 23663f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige} 23763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 23863f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshigestatic acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) 23963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige{ 24063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige acpi_status status; 24163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 24263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige mutex_lock(&osc_lock); 243ab8e8957a2ae21c0f036476c6db13e949be730acRafael J. Wysocki status = acpi_pci_query_osc(root, flags, NULL); 24463f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige mutex_unlock(&osc_lock); 24563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return status; 24663f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige} 24763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 24876d56de57ae60c6be383e48e7068fd973d5fb08aAlex Chiangstruct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) 24963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige{ 25063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige struct acpi_pci_root *root; 251cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi struct acpi_device *device; 252c1aec8341627dad5d63cc24aa6746dc077f5b706Bjorn Helgaas 253cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi if (acpi_bus_get_device(handle, &device) || 254cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi acpi_match_device_ids(device, root_device_ids)) 255cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi return NULL; 256cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi 257cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi root = acpi_driver_data(device); 258cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi 259cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fdTaku Izumi return root; 26063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige} 26176d56de57ae60c6be383e48e7068fd973d5fb08aAlex ChiangEXPORT_SYMBOL_GPL(acpi_pci_find_root); 26263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 2632f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiangstruct acpi_handle_node { 2642f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang struct list_head node; 2652f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang acpi_handle handle; 2662f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang}; 2672f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 2682f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang/** 2692f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev 2702f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * @handle: the handle in question 2712f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * 2722f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * Given an ACPI CA handle, the desired PCI device is located in the 2732f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * list of PCI devices. 2742f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * 2752f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * If the device is found, its reference count is increased and this 2762f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * function returns a pointer to its data structure. The caller must 2772f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * decrement the reference count by calling pci_dev_put(). 2782f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * If no device is found, %NULL is returned. 2792f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang */ 2802f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiangstruct pci_dev *acpi_get_pci_dev(acpi_handle handle) 2812f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang{ 2822f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang int dev, fn; 2832f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang unsigned long long adr; 2842f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang acpi_status status; 2852f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang acpi_handle phandle; 2862f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang struct pci_bus *pbus; 2872f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang struct pci_dev *pdev = NULL; 2882f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang struct acpi_handle_node *node, *tmp; 2892f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang struct acpi_pci_root *root; 2902f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang LIST_HEAD(device_list); 2912f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 2922f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang /* 2932f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * Walk up the ACPI CA namespace until we reach a PCI root bridge. 2942f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang */ 2952f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang phandle = handle; 2962f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang while (!acpi_is_root_bridge(phandle)) { 2972f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); 2982f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang if (!node) 2992f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang goto out; 3002f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3012f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang INIT_LIST_HEAD(&node->node); 3022f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang node->handle = phandle; 3032f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang list_add(&node->node, &device_list); 3042f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3052f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang status = acpi_get_parent(phandle, &phandle); 3062f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang if (ACPI_FAILURE(status)) 3072f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang goto out; 3082f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang } 3092f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3102f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang root = acpi_pci_find_root(phandle); 3112f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang if (!root) 3122f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang goto out; 3132f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3142f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang pbus = root->bus; 3152f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3162f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang /* 3172f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * Now, walk back down the PCI device tree until we return to our 3182f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * original handle. Assumes that everything between the PCI root 3192f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang * bridge and the device we're looking for must be a P2P bridge. 3202f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang */ 3212f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang list_for_each_entry(node, &device_list, node) { 3222f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang acpi_handle hnd = node->handle; 3232f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); 3242f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang if (ACPI_FAILURE(status)) 3252f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang goto out; 3262f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang dev = (adr >> 16) & 0xffff; 3272f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang fn = adr & 0xffff; 3282f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3292f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); 330412af97838828bc6d035a1902c8974f944663da6Troy Moure if (!pdev || hnd == handle) 3312f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang break; 3322f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3332f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang pbus = pdev->subordinate; 3342f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang pci_dev_put(pdev); 335497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki 336497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki /* 337497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki * This function may be called for a non-PCI device that has a 338497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki * PCI parent (eg. a disk under a PCI SATA controller). In that 339497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki * case pdev->subordinate will be NULL for the parent. 340497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki */ 341497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki if (!pbus) { 342497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); 343497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki pdev = NULL; 344497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki break; 345497fb54f578efd2b479727bc88d5ef942c0a1e2dRafael J. Wysocki } 3462f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang } 3472f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiangout: 3482f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang list_for_each_entry_safe(node, tmp, &device_list, node) 3492f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang kfree(node); 3502f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 3512f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang return pdev; 3522f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang} 3532f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander ChiangEXPORT_SYMBOL_GPL(acpi_get_pci_dev); 3542f7bbceb5b6aa938024bb4dad93c410fa59ed3b9Alexander Chiang 35563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige/** 35675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * acpi_pci_osc_control_set - Request control of PCI root _OSC features. 35775fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). 35875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * @mask: Mask of _OSC bits to request control of, place to store control mask. 35975fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * @req: Mask of _OSC bits the control of is essential to the caller. 36063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige * 36175fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * Run _OSC query for @mask and if that is successful, compare the returned 36275fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * mask of control bits with @req. If all of the @req bits are set in the 36375fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * returned mask, run _OSC request for it. 36475fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * 36575fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * The variable at the @mask address may be modified regardless of whether or 36675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * not the function returns success. On success it will contain the mask of 36775fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * _OSC bits the BIOS has granted control of, but its contents are meaningless 36875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki * on failure. 36963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige **/ 37075fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysockiacpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) 37163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige{ 37275fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki struct acpi_pci_root *root; 3734ffe6e54b0ce259d254e7740a7a4a99dad14a484Bjorn Helgaas acpi_status status = AE_OK; 37475fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki u32 ctrl, capbuf[3]; 37563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 37675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if (!mask) 37775fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki return AE_BAD_PARAMETER; 37875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki 37975fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki ctrl = *mask & OSC_PCI_CONTROL_MASKS; 38075fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if ((ctrl & req) != req) 38163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return AE_TYPE; 38263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 38363f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige root = acpi_pci_find_root(handle); 38463f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige if (!root) 38563f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return AE_NOT_EXIST; 38663f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 38763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige mutex_lock(&osc_lock); 38875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki 38975fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki *mask = ctrl | root->osc_control_set; 39063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige /* No need to evaluate _OSC if the control was already granted. */ 39175fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if ((root->osc_control_set & ctrl) == ctrl) 39263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige goto out; 39363f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 39475fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki /* Need to check the available controls bits before requesting them. */ 39575fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki while (*mask) { 39675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki status = acpi_pci_query_osc(root, root->osc_support_set, mask); 39775fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if (ACPI_FAILURE(status)) 39875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki goto out; 39975fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if (ctrl == *mask) 40075fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki break; 401955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_control(root, "platform does not support", 402955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas ctrl & ~(*mask)); 40375fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki ctrl = *mask; 40475fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki } 4052b8fd9186d9275b07aef43e5bb4e98cd571f9a7dRafael J. Wysocki 40675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki if ((ctrl & req) != req) { 407955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_control(root, "not requesting control; platform does not support", 408955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas req & ~(ctrl)); 40963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige status = AE_SUPPORT; 41063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige goto out; 41163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige } 41263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 413b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_QUERY_DWORD] = 0; 414b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set; 415b938a229c85a567de7dba2d806d9f63a7c90483eBjorn Helgaas capbuf[OSC_CONTROL_DWORD] = ctrl; 41675fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki status = acpi_pci_run_osc(handle, capbuf, mask); 41763f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige if (ACPI_SUCCESS(status)) 41875fb60f26befb59dbfa05cb122972642b7bdd219Rafael J. Wysocki root->osc_control_set = *mask; 41963f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshigeout: 42063f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige mutex_unlock(&osc_lock); 42163f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige return status; 42263f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige} 4239f5404d8ea90bfa4d58a3936e5a3d0d28cecf60fKenji KaneshigeEXPORT_SYMBOL(acpi_pci_osc_control_set); 42463f10f0f6df4e4e860b790d64bebfde85b540b0aKenji Kaneshige 4253e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaasstatic void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm, 4263e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas int *clear_aspm) 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 428955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas u32 support, control, requested; 4293e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas acpi_status status; 4303e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas struct acpi_device *device = root->device; 431bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu acpi_handle handle = device->handle; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4332786f6e388e9dfe9e7b1c3c6bd7fcfba9cfb9831Rui Zhang /* 4347bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett * Apple always return failure on _OSC calls when _OSI("Darwin") has 4357bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett * been called successfully. We know the feature set supported by the 4367bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett * platform, so avoid calling _OSC at all 4377bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett */ 4387bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett 4397bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett if (dmi_match(DMI_SYS_VENDOR, "Apple Inc.")) { 4407bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL; 4417bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett decode_osc_control(root, "OS assumes control of", 4427bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett root->osc_control_set); 4437bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett return; 4447bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett } 4457bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett 4467bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334Matthew Garrett /* 447990a7ac5645883a833a11b900bb6f25b65dea65bAndrew Patterson * All supported architectures that use ACPI have support for 448990a7ac5645883a833a11b900bb6f25b65dea65bAndrew Patterson * PCI domains, so we indicate this in _OSC support capabilities. 4492786f6e388e9dfe9e7b1c3c6bd7fcfba9cfb9831Rui Zhang */ 45065afe91622c456560e20d57a779b807c20822e81Bjorn Helgaas support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; 4518c33f51df406e1a1f7fa4e9b244845b7ebd61fa6Taku Izumi if (pci_ext_cfg_avail()) 452b8eb67fcc4548b9f0d00bbfd1c0c8f72d8018900Bjorn Helgaas support |= OSC_PCI_EXT_CONFIG_SUPPORT; 4531b2a7be60eaaf17bc88368d748471dd70e40befdBjorn Helgaas if (pcie_aspm_support_enabled()) 454b8eb67fcc4548b9f0d00bbfd1c0c8f72d8018900Bjorn Helgaas support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT; 45507ae95f988a34465bdcb384bfa73c03424fe2312Andrew Patterson if (pci_msi_enabled()) 456b8eb67fcc4548b9f0d00bbfd1c0c8f72d8018900Bjorn Helgaas support |= OSC_PCI_MSI_SUPPORT; 457955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 458955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_support(root, "OS supports", support); 4591b2a7be60eaaf17bc88368d748471dd70e40befdBjorn Helgaas status = acpi_pci_osc_support(root, support); 4601b2a7be60eaaf17bc88368d748471dd70e40befdBjorn Helgaas if (ACPI_FAILURE(status)) { 46165afe91622c456560e20d57a779b807c20822e81Bjorn Helgaas dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", 46265afe91622c456560e20d57a779b807c20822e81Bjorn Helgaas acpi_format_exception(status)); 4631b2a7be60eaaf17bc88368d748471dd70e40befdBjorn Helgaas *no_aspm = 1; 46465afe91622c456560e20d57a779b807c20822e81Bjorn Helgaas return; 4652d9c86774756193edff2a2a9077264f666c626deRafael J. Wysocki } 466b8178f130e25c1bdac1c33e0996f1ff6e20ec08eBjorn Helgaas 46743613a1fac0eec78de14fecc9de184e1052abac7Bjorn Helgaas if (pcie_ports_disabled) { 46843613a1fac0eec78de14fecc9de184e1052abac7Bjorn Helgaas dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n"); 46943613a1fac0eec78de14fecc9de184e1052abac7Bjorn Helgaas return; 47043613a1fac0eec78de14fecc9de184e1052abac7Bjorn Helgaas } 47143613a1fac0eec78de14fecc9de184e1052abac7Bjorn Helgaas 472de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) { 473955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_support(root, "not requesting OS control; OS requires", 474955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas ACPI_PCIE_REQ_SUPPORT); 475de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas return; 476de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas } 477de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas 478de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL 479de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 480de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas | OSC_PCI_EXPRESS_PME_CONTROL; 481de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas 482de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas if (pci_aer_available()) { 483de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas if (aer_acpi_firmware_first()) 484955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas dev_info(&device->dev, 485955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas "PCIe AER handled by firmware\n"); 486de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas else 487de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas control |= OSC_PCI_EXPRESS_AER_CONTROL; 488de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas } 489415e12b2379239973feab91850b0dce985c6058aRafael J. Wysocki 490955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas requested = control; 491de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas status = acpi_pci_osc_control_set(handle, &control, 492de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas OSC_PCI_EXPRESS_CAPABILITY_CONTROL); 493de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas if (ACPI_SUCCESS(status)) { 494955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_control(root, "OS now controls", control); 495de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { 4963dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman /* 497de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * We have ASPM control, but the FADT indicates 498de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * that it's unsupported. Clear it. 4993dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman */ 500de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas *clear_aspm = 1; 501eca67315e0e0d5fd91264d79c88694006dbc7d31Naga Chumbalkar } 502a246670ddee3132fa71f8993d3989ad8ac04d965Rafael J. Wysocki } else { 503955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_control(root, "OS requested", requested); 504955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas decode_osc_control(root, "platform willing to grant", control); 505955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", 506955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas acpi_format_exception(status)); 507955f14b4ed0648da12f0a7011f94150b8982a5c2Bjorn Helgaas 508de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas /* 509de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * We want to disable ASPM here, but aspm_disabled 510de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * needs to remain in its state from boot so that we 511de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * properly handle PCIe 1.1 devices. So we set this 512de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * flag here, to defer the action until after the ACPI 513de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas * root scan. 514de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas */ 515de18966228ed4b42393ecbe83ba20ff3db78bfdcBjorn Helgaas *no_aspm = 1; 516415e12b2379239973feab91850b0dce985c6058aRafael J. Wysocki } 5173e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas} 5183e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas 51900c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockistatic int acpi_pci_root_add(struct acpi_device *device, 52000c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysocki const struct acpi_device_id *not_used) 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 522f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas unsigned long long segment, bus; 523f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas acpi_status status; 524f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas int result; 525f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas struct acpi_pci_root *root; 526bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu acpi_handle handle = device->handle; 5273e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas int no_aspm = 0, clear_aspm = 0; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5296ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); 5306ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas if (!root) 5316ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas return -ENOMEM; 5326ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas 533f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas segment = 0; 534bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, 535f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas &segment); 536f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 5376dc7d22c67384d313fca88c1a63af3220a2beff7Jiang Liu dev_err(&device->dev, "can't evaluate _SEG\n"); 5386ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas result = -ENODEV; 5396ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas goto end; 540f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas } 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 542f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ 5436ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root->secondary.flags = IORESOURCE_BUS; 544bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu status = try_get_root_bridge_busnr(handle, &root->secondary); 545f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas if (ACPI_FAILURE(status)) { 5466ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas /* 5476ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas * We need both the start and end of the downstream bus range 5486ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas * to interpret _CBA (MMCONFIG base address), so it really is 5496ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas * supposed to be in _CRS. If we don't find it there, all we 5506ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas * can do is assume [_BBN-0xFF] or [0-0xFF]. 5516ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas */ 5526ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root->secondary.end = 0xFF; 5536dc7d22c67384d313fca88c1a63af3220a2beff7Jiang Liu dev_warn(&device->dev, 5546dc7d22c67384d313fca88c1a63af3220a2beff7Jiang Liu FW_BUG "no secondary bus range in _CRS\n"); 555bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, 556e545b55a1e980cbb6a158886286106bbf39722b1Jon Mason NULL, &bus); 5576ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas if (ACPI_SUCCESS(status)) 5586ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root->secondary.start = bus; 5596ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas else if (status == AE_NOT_FOUND) 5606ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root->secondary.start = 0; 5616ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas else { 5626dc7d22c67384d313fca88c1a63af3220a2beff7Jiang Liu dev_err(&device->dev, "can't evaluate _BBN\n"); 5636ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas result = -ENODEV; 5646ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas goto end; 565f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas } 566f5eebbe119a861b5e4f5c67c886eab0937c686edBjorn Helgaas } 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 56832917e5b589d813c9dc0f2d140d8c52898ddb6fbPatrick Mochel root->device = device; 5690705495d9010048e293013d9d129cf723363a0a8Bjorn Helgaas root->segment = segment & 0xFFFF; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); 572db89b4f0dbab837d0f3de2c3e9427a8d5393afa3Pavel Machek device->driver_data = root; 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5746dc7d22c67384d313fca88c1a63af3220a2beff7Jiang Liu pr_info(PREFIX "%s [%s] (domain %04x %pR)\n", 5754be44fcd3bf648b782f4460fd06dfae6c42ded4bLen Brown acpi_device_name(device), acpi_device_bid(device), 5766ad95513d60096b569e4e4bd721420f03b57e4d4Bjorn Helgaas root->segment, &root->secondary); 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 578bfe2414aecca03d884f680d5cf1d612c7813ee33Jiang Liu root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5803e43abb012d45dc284ef9a0fb0cea0fb004b5607Bjorn Helgaas negotiate_os_control(root, &no_aspm, &clear_aspm); 581415e12b2379239973feab91850b0dce985c6058aRafael J. Wysocki 5823dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman /* 5833dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * TBD: Need PCI interface for enumeration/configuration of roots. 5843dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman */ 5853dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman 5863dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman /* 5873dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * Scan the Root Bridge 5883dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * -------------------- 5893dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * Must do this prior to any attempt to bind the root device, as the 5903dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * PCI namespace does not get created until this call is made (and 5913dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman * thus the root bridge's pci_dev does not exist). 5923dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman */ 5933dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman root->bus = pci_acpi_scan_root(root); 5943dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman if (!root->bus) { 5953dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman dev_err(&device->dev, 5963dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman "Bus %04x:%02x not present in PCI namespace\n", 5973dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman root->segment, (unsigned int)root->secondary.start); 598f516bde5122422889398d10e8e746d18860bd42eRafael J. Wysocki device->driver_data = NULL; 5993dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman result = -ENODEV; 6003dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman goto end; 6013dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman } 6023dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman 6033dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman if (clear_aspm) { 6043dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman dev_info(&device->dev, "Disabling ASPM (FADT indicates it is unsupported)\n"); 6053dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman pcie_clear_aspm(root->bus); 6063dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman } 6073dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman if (no_aspm) 6083dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman pcie_no_aspm(); 6093dc48af310709b85d07c8b0d3aa8f1ead02829d3Neil Horman 610c072530f391e33bd22ed0638c08f07528f154493Rafael J. Wysocki pci_acpi_add_bus_pm_notifier(device); 611b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki if (device->wakeup.flags.run_wake) 612b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki device_set_run_wake(root->bus->bridge, true); 613b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki 6143c449ed0075994b3f3371f8254560428ba787efcYinghai Lu if (system_state != SYSTEM_BOOTING) { 6153c449ed0075994b3f3371f8254560428ba787efcYinghai Lu pcibios_resource_survey_bus(root->bus); 61639772038ea93e85ea4f1307ec9c1f48a063d89a0Yinghai Lu pci_assign_unassigned_root_bus_resources(root->bus); 617516ca22307df6ba972e9719ec756a356187cdde7Jiang Liu } 61862a08c5a3173c4462239804b959c0d29dc74493bYinghai Lu 6197a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki pci_lock_rescan_remove(); 620caf420c68afe01acd7c458ce40b85b3db5330ff5Bjorn Helgaas pci_bus_add_devices(root->bus); 6217a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki pci_unlock_rescan_remove(); 62200c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysocki return 1; 62347525cda88f5cc4dbe24de1cc05617c08e2d7c4aRafael J. Wysocki 62447525cda88f5cc4dbe24de1cc05617c08e2d7c4aRafael J. Wysockiend: 62547525cda88f5cc4dbe24de1cc05617c08e2d7c4aRafael J. Wysocki kfree(root); 62647525cda88f5cc4dbe24de1cc05617c08e2d7c4aRafael J. Wysocki return result; 627c431ada45d65b305a6aab4557067e564b23ce5a5Rajesh Shah} 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 62900c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockistatic void acpi_pci_root_remove(struct acpi_device *device) 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 631caf420c68afe01acd7c458ce40b85b3db5330ff5Bjorn Helgaas struct acpi_pci_root *root = acpi_driver_data(device); 632c8e9afb124f61e0c9901801f4c95ae4208bd4536Jiang Liu 6337a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki pci_lock_rescan_remove(); 6347a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki 6359738a1fd214b8f617b31503307c79b6af72ee464Yinghai Lu pci_stop_root_bus(root->bus); 6369738a1fd214b8f617b31503307c79b6af72ee464Yinghai Lu 637b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki device_set_run_wake(root->bus->bridge, false); 638b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki pci_acpi_remove_bus_pm_notifier(device); 639b67ea76172d4b1922c4b3c46c8ea8e9fec1ff38cRafael J. Wysocki 6409738a1fd214b8f617b31503307c79b6af72ee464Yinghai Lu pci_remove_root_bus(root->bus); 6419738a1fd214b8f617b31503307c79b6af72ee464Yinghai Lu 6427a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki pci_unlock_rescan_remove(); 6437a3bb55ebd1cb04f08dd68cf60af24b434f8cc2aRafael J. Wysocki 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(root); 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 64700c43b9682507dc622c03172fde1032e2a216e9dRafael J. Wysockivoid __init acpi_pci_root_init(void) 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 649d3072e6a7e9bf7aca200370317f8e297be360b17Rafael J. Wysocki acpi_hest_init(); 6503338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki if (acpi_pci_disabled) 651668192b678201d2fff27c6cc76bb003c1ec4a52aYinghai Lu return; 652668192b678201d2fff27c6cc76bb003c1ec4a52aYinghai Lu 6533338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki pci_acpi_crs_quirks(); 6543338db0057ed9f554050bd06863731c515d79672Rafael J. Wysocki acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root"); 655668192b678201d2fff27c6cc76bb003c1ec4a52aYinghai Lu} 656