^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/pci-acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/dmar.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/platform_data/x86/apple.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <acpi/apei.h> /* for acpi_hest_init() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define ACPI_PCI_ROOT_CLASS "pci_bridge"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int acpi_pci_root_add(struct acpi_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) const struct acpi_device_id *not_used);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static void acpi_pci_root_remove(struct acpi_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int acpi_pci_root_scan_dependent(struct acpi_device *adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) acpiphp_check_host_bridge(adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) | OSC_PCI_ASPM_SUPPORT \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) | OSC_PCI_CLOCK_PM_SUPPORT \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) | OSC_PCI_MSI_SUPPORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static const struct acpi_device_id root_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {"PNP0A03", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct acpi_scan_handler pci_root_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .ids = root_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .attach = acpi_pci_root_add,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .detach = acpi_pci_root_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .hotplug = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .enabled = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .scan_dependent = acpi_pci_root_scan_dependent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static DEFINE_MUTEX(osc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * @handle: the ACPI CA node in question.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * Note: we could make this API take a struct acpi_device * instead, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * for now, it's more convenient to operate on an acpi_handle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int acpi_is_root_bridge(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct acpi_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ret = acpi_bus_get_device(handle, &device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = acpi_match_device_ids(device, root_device_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) EXPORT_SYMBOL_GPL(acpi_is_root_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct resource *res = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct acpi_resource_address64 address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) status = acpi_resource_to_address64(resource, &address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if ((address.address.address_length > 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) (address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) res->start = address.address.minimum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) res->end = address.address.minimum + address.address.address_length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static acpi_status try_get_root_bridge_busnr(acpi_handle handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct resource *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) res->start = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) status =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) acpi_walk_resources(handle, METHOD_NAME__CRS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) get_root_bridge_busnr_callback, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (res->start == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return AE_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct pci_osc_bit_struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) u32 bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) char *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static struct pci_osc_bit_struct pci_osc_support_bit[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) { OSC_PCI_ASPM_SUPPORT, "ASPM" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) { OSC_PCI_MSI_SUPPORT, "MSI" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) { OSC_PCI_EDR_SUPPORT, "EDR" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) { OSC_PCI_HPX_TYPE_3_SUPPORT, "HPX-Type3" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static struct pci_osc_bit_struct pci_osc_control_bit[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) { OSC_PCI_EXPRESS_PME_CONTROL, "PME" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) { OSC_PCI_EXPRESS_AER_CONTROL, "AER" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) { OSC_PCI_EXPRESS_LTR_CONTROL, "LTR" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) { OSC_PCI_EXPRESS_DPC_CONTROL, "DPC" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct pci_osc_bit_struct *table, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) char buf[80];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int i, len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct pci_osc_bit_struct *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) buf[0] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) for (i = 0, entry = table; i < size; i++, entry++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (word & entry->bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) len += scnprintf(buf + len, sizeof(buf) - len, "%s%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) len ? " " : "", entry->desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) decode_osc_bits(root, msg, word, pci_osc_support_bit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ARRAY_SIZE(pci_osc_support_bit));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) decode_osc_bits(root, msg, word, pci_osc_control_bit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ARRAY_SIZE(pci_osc_control_bit));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static acpi_status acpi_pci_run_osc(acpi_handle handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) const u32 *capbuf, u32 *retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct acpi_osc_context context = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .uuid_str = pci_osc_uuid_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) .rev = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .cap.length = 12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .cap.pointer = (void *)capbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) status = acpi_run_osc(handle, &context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) *retval = *((u32 *)(context.ret.pointer + 8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) kfree(context.ret.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) u32 support,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) u32 *control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) u32 result, capbuf[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) support &= OSC_PCI_SUPPORT_MASKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) support |= root->osc_support_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) capbuf[OSC_SUPPORT_DWORD] = support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (control) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) *control &= OSC_PCI_CONTROL_MASKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* Run _OSC query only with existing controls. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) capbuf[OSC_CONTROL_DWORD] = root->osc_control_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) root->osc_support_set = support;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) *control = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) mutex_lock(&osc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) status = acpi_pci_query_osc(root, flags, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) mutex_unlock(&osc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct acpi_pci_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct acpi_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (acpi_bus_get_device(handle, &device) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) acpi_match_device_ids(device, root_device_ids))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) root = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) EXPORT_SYMBOL_GPL(acpi_pci_find_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct acpi_handle_node {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) acpi_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * @handle: the handle in question
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * Given an ACPI CA handle, the desired PCI device is located in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * list of PCI devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * If the device is found, its reference count is increased and this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * function returns a pointer to its data structure. The caller must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * decrement the reference count by calling pci_dev_put().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * If no device is found, %NULL is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int dev, fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) unsigned long long adr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) acpi_handle phandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct pci_bus *pbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct pci_dev *pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct acpi_handle_node *node, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct acpi_pci_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) LIST_HEAD(device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * Walk up the ACPI CA namespace until we reach a PCI root bridge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) phandle = handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) while (!acpi_is_root_bridge(phandle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) INIT_LIST_HEAD(&node->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) node->handle = phandle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) list_add(&node->node, &device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) status = acpi_get_parent(phandle, &phandle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) root = acpi_pci_find_root(phandle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) pbus = root->bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * Now, walk back down the PCI device tree until we return to our
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * original handle. Assumes that everything between the PCI root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * bridge and the device we're looking for must be a P2P bridge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) list_for_each_entry(node, &device_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) acpi_handle hnd = node->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) dev = (adr >> 16) & 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) fn = adr & 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (!pdev || hnd == handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) pbus = pdev->subordinate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) pci_dev_put(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * This function may be called for a non-PCI device that has a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * PCI parent (eg. a disk under a PCI SATA controller). In that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * case pdev->subordinate will be NULL for the parent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (!pbus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) list_for_each_entry_safe(node, tmp, &device_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) kfree(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) EXPORT_SYMBOL_GPL(acpi_get_pci_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * acpi_pci_osc_control_set - Request control of PCI root _OSC features.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * @mask: Mask of _OSC bits to request control of, place to store control mask.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * @req: Mask of _OSC bits the control of is essential to the caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * Run _OSC query for @mask and if that is successful, compare the returned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * mask of control bits with @req. If all of the @req bits are set in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) * returned mask, run _OSC request for it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * The variable at the @mask address may be modified regardless of whether or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * not the function returns success. On success it will contain the mask of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * _OSC bits the BIOS has granted control of, but its contents are meaningless
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct acpi_pci_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) acpi_status status = AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) u32 ctrl, capbuf[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (!mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return AE_BAD_PARAMETER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ctrl = *mask & OSC_PCI_CONTROL_MASKS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if ((ctrl & req) != req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return AE_TYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) root = acpi_pci_find_root(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return AE_NOT_EXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) mutex_lock(&osc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) *mask = ctrl | root->osc_control_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) /* No need to evaluate _OSC if the control was already granted. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if ((root->osc_control_set & ctrl) == ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /* Need to check the available controls bits before requesting them. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) while (*mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) status = acpi_pci_query_osc(root, root->osc_support_set, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (ctrl == *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) decode_osc_control(root, "platform does not support",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) ctrl & ~(*mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) ctrl = *mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if ((ctrl & req) != req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) decode_osc_control(root, "not requesting control; platform does not support",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) req & ~(ctrl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) status = AE_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) capbuf[OSC_QUERY_DWORD] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) capbuf[OSC_CONTROL_DWORD] = ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) status = acpi_pci_run_osc(handle, capbuf, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (ACPI_SUCCESS(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) root->osc_control_set = *mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) mutex_unlock(&osc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) EXPORT_SYMBOL(acpi_pci_osc_control_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) bool is_pcie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) u32 support, control, requested;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct acpi_device *device = root->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) acpi_handle handle = device->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * Apple always return failure on _OSC calls when _OSI("Darwin") has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * been called successfully. We know the feature set supported by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * platform, so avoid calling _OSC at all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (x86_apple_machine) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) decode_osc_control(root, "OS assumes control of",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) root->osc_control_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * All supported architectures that use ACPI have support for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * PCI domains, so we indicate this in _OSC support capabilities.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) support = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) support |= OSC_PCI_HPX_TYPE_3_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (pci_ext_cfg_avail())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) support |= OSC_PCI_EXT_CONFIG_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (pcie_aspm_support_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (pci_msi_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) support |= OSC_PCI_MSI_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (IS_ENABLED(CONFIG_PCIE_EDR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) support |= OSC_PCI_EDR_SUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) decode_osc_support(root, "OS supports", support);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) status = acpi_pci_osc_support(root, support);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) *no_aspm = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /* _OSC is optional for PCI host bridges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if ((status == AE_NOT_FOUND) && !is_pcie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) dev_info(&device->dev, "_OSC failed (%s)%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) acpi_format_exception(status),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) pcie_aspm_support_enabled() ? "; disabling ASPM" : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (pcie_ports_disabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) decode_osc_support(root, "not requesting OS control; OS requires",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) ACPI_PCIE_REQ_SUPPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) | OSC_PCI_EXPRESS_PME_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (IS_ENABLED(CONFIG_PCIEASPM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) control |= OSC_PCI_EXPRESS_LTR_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) control |= OSC_PCI_EXPRESS_NATIVE_HP_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) control |= OSC_PCI_SHPC_NATIVE_HP_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (pci_aer_available())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) control |= OSC_PCI_EXPRESS_AER_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * Per the Downstream Port Containment Related Enhancements ECN to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * the PCI Firmware Spec, r3.2, sec 4.5.1, table 4-5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * OSC_PCI_EXPRESS_DPC_CONTROL indicates the OS supports both DPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * and EDR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (IS_ENABLED(CONFIG_PCIE_DPC) && IS_ENABLED(CONFIG_PCIE_EDR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) control |= OSC_PCI_EXPRESS_DPC_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) requested = control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) status = acpi_pci_osc_control_set(handle, &control,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) decode_osc_control(root, "OS now controls", control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * We have ASPM control, but the FADT indicates that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * it's unsupported. Leave existing configuration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * intact and prevent the OS from touching it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) dev_info(&device->dev, "FADT indicates ASPM is unsupported, using BIOS configuration\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) *no_aspm = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) decode_osc_control(root, "OS requested", requested);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) decode_osc_control(root, "platform willing to grant", control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) acpi_format_exception(status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * We want to disable ASPM here, but aspm_disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * needs to remain in its state from boot so that we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * properly handle PCIe 1.1 devices. So we set this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * flag here, to defer the action until after the ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * root scan.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) *no_aspm = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) static int acpi_pci_root_add(struct acpi_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) const struct acpi_device_id *not_used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) unsigned long long segment, bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) struct acpi_pci_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) acpi_handle handle = device->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) int no_aspm = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) bool hotadd = system_state == SYSTEM_RUNNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) bool is_pcie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) segment = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) &segment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) dev_err(&device->dev, "can't evaluate _SEG\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) /* Check _CRS first, then _BBN. If no _BBN, default to zero. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) root->secondary.flags = IORESOURCE_BUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) status = try_get_root_bridge_busnr(handle, &root->secondary);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * We need both the start and end of the downstream bus range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * to interpret _CBA (MMCONFIG base address), so it really is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * supposed to be in _CRS. If we don't find it there, all we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * can do is assume [_BBN-0xFF] or [0-0xFF].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) root->secondary.end = 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) dev_warn(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) FW_BUG "no secondary bus range in _CRS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) status = acpi_evaluate_integer(handle, METHOD_NAME__BBN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) NULL, &bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (ACPI_SUCCESS(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) root->secondary.start = bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) else if (status == AE_NOT_FOUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) root->secondary.start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) dev_err(&device->dev, "can't evaluate _BBN\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) root->device = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) root->segment = segment & 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) device->driver_data = root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (hotadd && dmar_device_add(handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) result = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) acpi_device_name(device), acpi_device_bid(device),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) root->segment, &root->secondary);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) is_pcie = strcmp(acpi_device_hid(device), "PNP0A08") == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) negotiate_os_control(root, &no_aspm, is_pcie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * TBD: Need PCI interface for enumeration/configuration of roots.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * Scan the Root Bridge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * --------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * Must do this prior to any attempt to bind the root device, as the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * PCI namespace does not get created until this call is made (and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * thus the root bridge's pci_dev does not exist).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) root->bus = pci_acpi_scan_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!root->bus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) dev_err(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) "Bus %04x:%02x not present in PCI namespace\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) root->segment, (unsigned int)root->secondary.start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) device->driver_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) goto remove_dmar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (no_aspm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) pcie_no_aspm();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) pci_acpi_add_bus_pm_notifier(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) device_set_wakeup_capable(root->bus->bridge, device->wakeup.flags.valid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (hotadd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) pcibios_resource_survey_bus(root->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) pci_assign_unassigned_root_bus_resources(root->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) * This is only called for the hotadd case. For the boot-time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) * case, we need to wait until after PCI initialization in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) * order to deal with IOAPICs mapped in on a PCI BAR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) * This is currently x86-specific, because acpi_ioapic_add()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * is an empty function without CONFIG_ACPI_HOTPLUG_IOAPIC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) * And CONFIG_ACPI_HOTPLUG_IOAPIC depends on CONFIG_X86_IO_APIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) * (see drivers/acpi/Kconfig).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) acpi_ioapic_add(root->device->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) pci_lock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) pci_bus_add_devices(root->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) pci_unlock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) remove_dmar:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (hotadd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) dmar_device_remove(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) kfree(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) static void acpi_pci_root_remove(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) struct acpi_pci_root *root = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) pci_lock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) pci_stop_root_bus(root->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) pci_ioapic_remove(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) device_set_wakeup_capable(root->bus->bridge, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) pci_acpi_remove_bus_pm_notifier(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) pci_remove_root_bus(root->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) WARN_ON(acpi_ioapic_remove(root));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) dmar_device_remove(device->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) pci_unlock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) kfree(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) * Following code to support acpi_pci_root_create() is copied from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) * arch/x86/pci/acpi.c and modified so it could be reused by x86, IA64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) * and ARM64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) static void acpi_pci_root_validate_resources(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) struct list_head *resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) unsigned long type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) LIST_HEAD(list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) struct resource *res1, *res2, *root = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) struct resource_entry *tmp, *entry, *entry2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) list_splice_init(resources, &list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) resource_list_for_each_entry_safe(entry, tmp, &list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) bool free = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) resource_size_t end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) res1 = entry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (!(res1->flags & type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) /* Exclude non-addressable range or non-addressable portion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) end = min(res1->end, root->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (end <= res1->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) res1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) free = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) } else if (res1->end != end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) res1, (unsigned long long)end + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) (unsigned long long)res1->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) res1->end = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) resource_list_for_each_entry(entry2, resources) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) res2 = entry2->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (!(res2->flags & type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * I don't like throwing away windows because then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * our resources no longer match the ACPI _CRS, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * the kernel resource tree doesn't allow overlaps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (resource_overlaps(res1, res2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) res2->start = min(res1->start, res2->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) res2->end = max(res1->end, res2->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) res2, res1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) free = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) resource_list_del(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) resource_list_free_entry(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) resource_list_add_tail(entry, resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) static void acpi_pci_root_remap_iospace(struct fwnode_handle *fwnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) struct resource_entry *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) #ifdef PCI_IOBASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) struct resource *res = entry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) resource_size_t cpu_addr = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) resource_size_t pci_addr = cpu_addr - entry->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) resource_size_t length = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) unsigned long port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (pci_register_io_range(fwnode, cpu_addr, length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) port = pci_address_to_pio(cpu_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (port == (unsigned long)-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) res->start = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) res->end = port + length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) entry->offset = port - pci_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (pci_remap_iospace(res, cpu_addr) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) pr_info("Remapped I/O %pa to %pR\n", &cpu_addr, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) res->flags |= IORESOURCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) struct list_head *list = &info->resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) struct acpi_device *device = info->bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) struct resource_entry *entry, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) flags = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_MEM_8AND16BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ret = acpi_dev_get_resources(device, list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) acpi_dev_filter_resource_type_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) (void *)flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) dev_warn(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) "failed to parse _CRS method, error code %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) else if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) dev_dbg(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) "no IO and memory resources present in _CRS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) resource_list_for_each_entry_safe(entry, tmp, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (entry->res->flags & IORESOURCE_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) acpi_pci_root_remap_iospace(&device->fwnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (entry->res->flags & IORESOURCE_DISABLED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) resource_list_destroy_entry(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) entry->res->name = info->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) acpi_pci_root_validate_resources(&device->dev, list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) IORESOURCE_MEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) acpi_pci_root_validate_resources(&device->dev, list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) IORESOURCE_IO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) static void pci_acpi_root_add_resources(struct acpi_pci_root_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) struct resource_entry *entry, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct resource *res, *conflict, *root = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) res = entry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (res->flags & IORESOURCE_MEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) root = &iomem_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) else if (res->flags & IORESOURCE_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) root = &ioport_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * Some legacy x86 host bridge drivers use iomem_resource and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * ioport_resource as default resource pool, skip it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (res == root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) conflict = insert_resource_conflict(root, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) if (conflict) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) dev_info(&info->bridge->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) "ignoring host bridge window %pR (conflicts with %s %pR)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) res, conflict->name, conflict);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) resource_list_destroy_entry(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) static void __acpi_pci_root_release_info(struct acpi_pci_root_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) struct resource_entry *entry, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) res = entry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (res->parent &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) release_resource(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) resource_list_destroy_entry(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) info->ops->release_info(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) static void acpi_pci_root_release_info(struct pci_host_bridge *bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct resource_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) resource_list_for_each_entry(entry, &bridge->windows) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) res = entry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) if (res->flags & IORESOURCE_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) pci_unmap_iospace(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (res->parent &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) release_resource(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) __acpi_pci_root_release_info(bridge->release_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) struct acpi_pci_root_ops *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) struct acpi_pci_root_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) void *sysdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) int ret, busnum = root->secondary.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) struct acpi_device *device = root->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) int node = acpi_get_node(device->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) struct pci_bus *bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct pci_host_bridge *host_bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) union acpi_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) info->root = root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) info->bridge = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) info->ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) INIT_LIST_HEAD(&info->resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) snprintf(info->name, sizeof(info->name), "PCI Bus %04x:%02x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) root->segment, busnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) if (ops->init_info && ops->init_info(info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) goto out_release_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (ops->prepare_resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) ret = ops->prepare_resources(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) ret = acpi_pci_probe_root_resources(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) goto out_release_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) pci_acpi_root_add_resources(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) pci_add_resource(&info->resources, &root->secondary);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) bus = pci_create_root_bus(NULL, busnum, ops->pci_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) sysdata, &info->resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (!bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) goto out_release_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) host_bridge = to_pci_host_bridge(bus->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) host_bridge->native_pcie_hotplug = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) host_bridge->native_shpc_hotplug = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) host_bridge->native_aer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) host_bridge->native_pme = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) host_bridge->native_ltr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) host_bridge->native_dpc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) * Evaluate the "PCI Boot Configuration" _DSM Function. If it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) * exists and returns 0, we must preserve any PCI resource
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) * assignments made by firmware for this host bridge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) DSM_PCI_PRESERVE_BOOT_CONFIG, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (obj && obj->type == ACPI_TYPE_INTEGER && obj->integer.value == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) host_bridge->preserve_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) ACPI_FREE(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) pci_scan_child_bus(bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) pci_set_host_bridge_release(host_bridge, acpi_pci_root_release_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) if (node != NUMA_NO_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) return bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) out_release_info:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) __acpi_pci_root_release_info(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) void __init acpi_pci_root_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) acpi_hest_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (acpi_pci_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) pci_acpi_crs_quirks();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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