cregit-Linux how code gets into the kernel

Release 4.10 drivers/acpi/pci_root.c

Directory: drivers/acpi
/*
 *  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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci-aspm.h>
#include <linux/dmar.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/dmi.h>
#include <acpi/apei.h>	/* for acpi_hest_init() */

#include "internal.h"


#define _COMPONENT		ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_root");

#define ACPI_PCI_ROOT_CLASS		"pci_bridge"

#define ACPI_PCI_ROOT_DEVICE_NAME	"PCI Root Bridge"
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);


static int acpi_pci_root_scan_dependent(struct acpi_device *adev) { acpiphp_check_host_bridge(adev); 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) static const struct acpi_device_id root_device_ids[] = { {"PNP0A03", 0}, {"", 0}, }; static struct acpi_scan_handler pci_root_handler = { .ids = root_device_ids, .attach = acpi_pci_root_add, .detach = acpi_pci_root_remove, .hotplug = { .enabled = true, .scan_dependent = acpi_pci_root_scan_dependent, }, }; static DEFINE_MUTEX(osc_lock); /** * 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; }

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EXPORT_SYMBOL_GPL(acpi_is_root_bridge);
static acpi_status get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) { struct resource *res = data; struct acpi_resource_address64 address; acpi_status status; status = acpi_resource_to_address64(resource, &address); if (ACPI_FAILURE(status)) return AE_OK; if ((address.address.address_length > 0) && (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { res->start = address.address.minimum; res->end = address.address.minimum + address.address.address_length - 1; } return AE_OK; }

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bjorn helgaasbjorn helgaas3736.27%233.33%
kenji kaneshigekenji kaneshige3332.35%116.67%
len brownlen brown2322.55%116.67%
lv zhenglv zheng87.84%116.67%
andy groverandy grover10.98%116.67%
Total102100.00%6100.00%


static acpi_status try_get_root_bridge_busnr(acpi_handle handle, struct resource *res) { acpi_status status; res->start = -1; status = acpi_walk_resources(handle, METHOD_NAME__CRS, get_root_bridge_busnr_callback, res); if (ACPI_FAILURE(status)) return status; if (res->start == -1) return AE_ERROR; return AE_OK; }

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kenji kaneshigekenji kaneshige5283.87%150.00%
bjorn helgaasbjorn helgaas1016.13%150.00%
Total62100.00%2100.00%

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]\n", msg, buf); }

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bjorn helgaasbjorn helgaas123100.00%1100.00%
Total123100.00%1100.00%


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)); }

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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";
static acpi_status acpi_pci_run_osc(acpi_handle handle, const u32 *capbuf, u32 *retval) { struct acpi_osc_context context = { .uuid_str = pci_osc_uuid_str, .rev = 1, .cap.length = 12, .cap.pointer = (void *)capbuf, }; acpi_status status; status = acpi_run_osc(handle, &context); if (ACPI_SUCCESS(status)) { *retval = *((u32 *)(context.ret.pointer + 8)); kfree(context.ret.pointer); } return status; }

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kenji kaneshigekenji kaneshige8075.47%150.00%
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Total106100.00%2100.00%


static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 support, u32 *control) { acpi_status status; u32 result, capbuf[3]; support &= OSC_PCI_SUPPORT_MASKS; support |= root->osc_support_set; capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_DWORD] = support; if (control) { *control &= OSC_PCI_CONTROL_MASKS; capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set; } else { /* Run _OSC query only with existing controls. */ capbuf[OSC_CONTROL_DWORD] = root->osc_control_set; } status = acpi_pci_run_osc(root->device->handle, capbuf, &result); if (ACPI_SUCCESS(status)) { root->osc_support_set = support; if (control) *control = result; } return status; }

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kenji kaneshigekenji kaneshige7657.58%125.00%
rafael j. wysockirafael j. wysocki4836.36%125.00%
yinghai luyinghai lu43.03%125.00%
bjorn helgaasbjorn helgaas43.03%125.00%
Total132100.00%4100.00%


static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) { acpi_status status; mutex_lock(&osc_lock); status = acpi_pci_query_osc(root, flags, NULL); mutex_unlock(&osc_lock); return status; }

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kenji kaneshigekenji kaneshige4195.35%150.00%
rafael j. wysockirafael j. wysocki24.65%150.00%
Total43100.00%2100.00%


struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) { struct acpi_pci_root *root; struct acpi_device *device; 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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taku izumitaku izumi2652.00%133.33%
kenji kaneshigekenji kaneshige1938.00%133.33%
len brownlen brown510.00%133.33%
Total50100.00%3100.00%

EXPORT_SYMBOL_GPL(acpi_pci_find_root); 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)); if (!pdev || hnd == handle) break; pbus = pdev->subordinate; pci_dev_put(pdev); /* * 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\n"); pdev = NULL; break; } } out: list_for_each_entry_safe(node, tmp, &device_list, node) kfree(node); return pdev; }

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alex chiangalex chiang23278.91%120.00%
rafael j. wysockirafael j. wysocki237.82%120.00%
kenji kaneshigekenji kaneshige237.82%120.00%
len brownlen brown134.42%120.00%
troy mouretroy moure31.02%120.00%
Total294100.00%5100.00%

EXPORT_SYMBOL_GPL(acpi_get_pci_dev); /** * 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. * * 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. **/
acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) { struct acpi_pci_root *root; acpi_status status = AE_OK; u32 ctrl, capbuf[3]; if (!mask) return AE_BAD_PARAMETER; ctrl = *mask & OSC_PCI_CONTROL_MASKS; if ((ctrl & req) != req) return AE_TYPE; root = acpi_pci_find_root(handle); if (!root) return AE_NOT_EXIST; mutex_lock(&osc_lock); *mask = ctrl | root->osc_control_set; /* No need to evaluate _OSC if the control was already granted. */ if ((root->osc_control_set & ctrl) == ctrl) goto out; /* 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; decode_osc_control(root, "platform does not support", ctrl & ~(*mask)); ctrl = *mask; } if ((ctrl & req) != req) { decode_osc_control(root, "not requesting control; platform does not support", req & ~(ctrl)); status = AE_SUPPORT; goto out; } capbuf[OSC_QUERY_DWORD] = 0; capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set; capbuf[OSC_CONTROL_DWORD] = ctrl; status = acpi_pci_run_osc(handle, capbuf, mask); if (ACPI_SUCCESS(status)) root->osc_control_set = *mask; out: mutex_unlock(&osc_lock); return status; }

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kenji kaneshigekenji kaneshige11243.41%220.00%
rafael j. wysockirafael j. wysocki7729.84%220.00%
bjorn helgaasbjorn helgaas3011.63%330.00%
rui zhangrui zhang218.14%110.00%
len brownlen brown176.59%110.00%
li shaohuali shaohua10.39%110.00%
Total258100.00%10100.00%

EXPORT_SYMBOL(acpi_pci_osc_control_set);
static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm) { u32 support, control, requested; acpi_status status; struct acpi_device *device = root->device; acpi_handle handle = device->handle; /* * 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; } /* * All supported architectures that use ACPI have support for * PCI domains, so we indicate this in _OSC support capabilities. */ support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; if (pci_ext_cfg_avail()) support |= OSC_PCI_EXT_CONFIG_SUPPORT; if (pcie_aspm_support_enabled()) support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT; if (pci_msi_enabled()) support |= OSC_PCI_MSI_SUPPORT; decode_osc_support(root, "OS supports", support); status = acpi_pci_osc_support(root, support); if (ACPI_FAILURE(status)) { dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", acpi_format_exception(status)); *no_aspm = 1; return; } if (pcie_ports_disabled) { dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n"); return; } if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) { decode_osc_support(root, "not requesting OS control; OS requires", ACPI_PCIE_REQ_SUPPORT); 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()) dev_info(&device->dev, "PCIe AER handled by firmware\n"); else control |= OSC_PCI_EXPRESS_AER_CONTROL; } requested = control; status = acpi_pci_osc_control_set(handle, &control, OSC_PCI_EXPRESS_CAPABILITY_CONTROL); if (ACPI_SUCCESS(status)) { decode_osc_control(root, "OS now controls", control); if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { /* * We have ASPM control, but the FADT indicates that * it's unsupported. Leave existing configuration * intact and prevent the OS from touching it. */ dev_info(&device->dev, "FADT indicates ASPM is unsupported, using BIOS configuration\n"); *no_aspm = 1; } } else { 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\n", acpi_format_exception(status)); /* * 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; } }

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bjorn helgaasbjorn helgaas28786.97%675.00%
matthew garrettmatthew garrett4313.03%225.00%
Total330100.00%8100.00%


static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used) { unsigned long long segment, bus; acpi_status status; int result; struct acpi_pci_root *root; acpi_handle handle = device->handle; int no_aspm = 0; bool hotadd = system_state != SYSTEM_BOOTING; root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); if (!root) return -ENOMEM; segment = 0; status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segment); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { dev_err(&device->dev, "can't evaluate _SEG\n"); result = -ENODEV; goto end; } /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ root->secondary.flags = IORESOURCE_BUS; status = try_get_root_bridge_busnr(handle, &root->secondary); if (ACPI_FAILURE(status)) { /* * 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; dev_warn(&device->dev, FW_BUG "no secondary bus range in _CRS\n"); status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &bus); if (ACPI_SUCCESS(status)) root->secondary.start = bus; else if (status == AE_NOT_FOUND) root->secondary.start = 0; else { dev_err(&device->dev, "can't evaluate _BBN\n"); result = -ENODEV; goto end; } } root->device = device; root->segment = segment & 0xFFFF; strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); device->driver_data = root; if (hotadd && dmar_device_add(handle)) { result = -ENXIO; goto end; } pr_info(PREFIX "%s [%s] (domain %04x %pR)\n", acpi_device_name(device), acpi_device_bid(device), root->segment, &root->secondary); root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle); negotiate_os_control(root, &no_aspm); /* * 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\n", root->segment, (unsigned int)root->secondary.start); device->driver_data = NULL; result = -ENODEV; goto remove_dmar; } if (no_aspm) pcie_no_aspm(); pci_acpi_add_bus_pm_notifier(device); if (device->wakeup.flags.run_wake) device_set_run_wake(root->bus->bridge, true); if (hotadd) { pcibios_resource_survey_bus(root->bus); pci_assign_unassigned_root_bus_resources(root->bus); /* * This is only called for the hotadd case. For the boot-time * case, we need to wait until after PCI initialization in * order to deal with IOAPICs mapped in on a PCI BAR. * * This is currently x86-specific, because acpi_ioapic_add() * is an empty function without CONFIG_ACPI_HOTPLUG_IOAPIC. * And CONFIG_ACPI_HOTPLUG_IOAPIC depends on CONFIG_X86_IO_APIC * (see drivers/acpi/Kconfig). */ acpi_ioapic_add(root->device->handle); } pci_lock_rescan_remove(); pci_bus_add_devices(root->bus); pci_unlock_rescan_remove(); return 1; remove_dmar: if (hotadd) dmar_device_remove(handle); end: kfree(root); return result; }

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bjorn helgaasbjorn helgaas14228.46%514.29%
jiang liujiang liu9919.84%617.14%
andy groverandy grover6713.43%25.71%
neil hormanneil horman6212.42%12.86%
rafael j. wysockirafael j. wysocki5511.02%514.29%
len brownlen brown316.21%25.71%
yinghai luyinghai lu183.61%38.57%
rajesh shahrajesh shah81.60%12.86%
rui wangrui wang51.00%25.71%
patrick mochelpatrick mochel30.60%25.71%
rui zhangrui zhang30.60%12.86%
andrew mortonandrew morton20.40%12.86%
andrew pattersonandrew patterson10.20%12.86%
taku izumitaku izumi10.20%12.86%
kenji kaneshigekenji kaneshige10.20%12.86%
pavel machekpavel machek10.20%12.86%
Total499100.00%35100.00%


static void acpi_pci_root_remove(struct acpi_device *device) { struct acpi_pci_root *root = acpi_driver_data(device); pci_lock_rescan_remove(); pci_stop_root_bus(root->bus); WARN_ON(acpi_ioapic_remove(root)); device_set_run_wake(root->bus->bridge, false); pci_acpi_remove_bus_pm_notifier(device); pci_remove_root_bus(root->bus); dmar_device_remove(device->handle); pci_unlock_rescan_remove(); kfree(root); }

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rafael j. wysockirafael j. wysocki2329.87%330.00%
andy groverandy grover2329.87%220.00%
jiang liujiang liu1519.48%220.00%
yinghai luyinghai lu1418.18%110.00%
rajesh shahrajesh shah11.30%110.00%
bjorn helgaasbjorn helgaas11.30%110.00%
Total77100.00%10100.00%

/* * 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)\n", res1); free = true; goto next; } else if (res1->end != end) { dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n", 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\n", 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); } }

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jiang liujiang liu318100.00%1100.00%
Total318100.00%1100.00%


static void acpi_pci_root_remap_iospace(struct resource_entry *entry) { #ifdef PCI_IOBASE struct resource *res = entry->res; resource_size_t cpu_addr = res->start; resource_size_t pci_addr = cpu_addr - entry->offset; resource_size_t length = resource_size(res); unsigned long port; if (pci_register_io_range(cpu_addr, length)) goto err; port = pci_address_to_pio(cpu_addr); if (port == (unsigned long)-1) goto err; res->start = port; res->end = port + length - 1; entry->offset = port - pci_addr; if (pci_remap_iospace(res, cpu_addr) < 0) goto err; pr_info("Remapped I/O %pa to %pR\n", &cpu_addr, res); return; err: res->flags |= IORESOURCE_DISABLED; #endif }

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jayachandran cjayachandran c143100.00%1100.00%
Total143100.00%1100.00%


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\n", ret); else if (ret == 0) dev_dbg(&device->dev, "no IO and memory resources present in _CRS\n"); else { resource_list_for_each_entry_safe(entry, tmp, list) { if (entry->res->flags & IORESOURCE_IO) acpi_pci_root_remap_iospace(entry); 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; }

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jiang liujiang liu17091.89%150.00%
jayachandran cjayachandran c158.11%150.00%
Total185100.00%2100.00%


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; /* * Some legacy x86 host bridge drivers use iomem_resource and * ioport_resource as default resource pool, skip it. */ if (res == root) continue; conflict = insert_resource_conflict(root, res); if (conflict) { dev_info(&info->bridge->dev, "ignoring host bridge window %pR (conflicts with %s %pR)\n", res, conflict->name, conflict); resource_list_destroy_entry(entry); } } }

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jiang liujiang liu125100.00%2100.00%
Total125100.00%2100.00%


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); }

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jiang liujiang liu83100.00%1100.00%
Total83100.00%1100.00%


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->flags & IORESOURCE_IO) pci_unmap_iospace(res); if (res->parent && (res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) release_resource(res); } __acpi_pci_root_release_info(bridge->release_data); }

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jiang liujiang liu6583.33%150.00%
jayachandran cjayachandran c1316.67%150.00%
Total78100.00%2100.00%


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\n", node); return bus; out_release_info: __acpi_pci_root_release_info(info); return NULL; }

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PersonTokensPropCommitsCommitProp
jiang liujiang liu255100.00%1100.00%
Total255100.00%1100.00%


void __init acpi_pci_root_init(void) { acpi_hest_init(); if (acpi_pci_disabled) return; pci_acpi_crs_quirks(); acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root"); }

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rafael j. wysockirafael j. wysocki829.63%333.33%
andy groverandy grover829.63%111.11%
patrick mochelpatrick mochel311.11%111.11%
yinghai luyinghai lu311.11%111.11%
bjorn helgaasbjorn helgaas311.11%111.11%
len brownlen brown13.70%111.11%
jiang liujiang liu13.70%111.11%
Total27100.00%9100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
jiang liujiang liu113530.49%89.64%
bjorn helgaasbjorn helgaas79421.33%1619.28%
kenji kaneshigekenji kaneshige45112.12%22.41%
alex chiangalex chiang3148.44%33.61%
rafael j. wysockirafael j. wysocki2837.60%1214.46%
jayachandran cjayachandran c1714.59%11.20%
andy groverandy grover1694.54%56.02%
len brownlen brown912.44%33.61%
neil hormanneil horman621.67%11.20%
matthew garrettmatthew garrett461.24%22.41%
yinghai luyinghai lu391.05%67.23%
li shaohuali shaohua300.81%11.20%
taku izumitaku izumi280.75%33.61%
rui zhangrui zhang240.64%11.20%
thomas renningerthomas renninger210.56%11.20%
patrick mochelpatrick mochel140.38%44.82%
rajesh shahrajesh shah90.24%11.20%
toshi kanitoshi kani90.24%11.20%
lv zhenglv zheng90.24%22.41%
rui wangrui wang50.13%22.41%
andrew pattersonandrew patterson40.11%11.20%
nagananda chumbalkarnagananda chumbalkar30.08%11.20%
troy mouretroy moure30.08%11.20%
tejun heotejun heo30.08%11.20%
andrew mortonandrew morton20.05%11.20%
jarkko nikulajarkko nikula10.03%11.20%
pavel machekpavel machek10.03%11.20%
marton nemethmarton nemeth10.03%11.20%
Total3722100.00%83100.00%
Directory: drivers/acpi
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