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path: root/drivers/acpi/pci_root.c
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Diffstat (limited to 'drivers/acpi/pci_root.c')
-rw-r--r--drivers/acpi/pci_root.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 96668ad09622..d9766797cd98 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -36,6 +36,7 @@
#include <linux/slab.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#include <acpi/apei.h>
#define PREFIX "ACPI: "
@@ -47,6 +48,11 @@ static int acpi_pci_root_add(struct acpi_device *device);
static int acpi_pci_root_remove(struct acpi_device *device, int type);
static int acpi_pci_root_start(struct acpi_device *device);
+#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \
+ | OSC_ACTIVE_STATE_PWR_SUPPORT \
+ | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \
+ | OSC_MSI_SUPPORT)
+
static const struct acpi_device_id root_device_ids[] = {
{"PNP0A03", 0},
{"", 0},
@@ -566,6 +572,33 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (flags != base_flags)
acpi_pci_osc_support(root, flags);
+ if (!pcie_ports_disabled
+ && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
+ flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
+ | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
+ | OSC_PCI_EXPRESS_PME_CONTROL;
+
+ if (pci_aer_available()) {
+ if (aer_acpi_firmware_first())
+ dev_dbg(root->bus->bridge,
+ "PCIe errors handled by BIOS.\n");
+ else
+ flags |= OSC_PCI_EXPRESS_AER_CONTROL;
+ }
+
+ dev_info(root->bus->bridge,
+ "Requesting ACPI _OSC control (0x%02x)\n", flags);
+
+ status = acpi_pci_osc_control_set(device->handle, &flags,
+ OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
+ if (ACPI_SUCCESS(status))
+ dev_info(root->bus->bridge,
+ "ACPI _OSC control (0x%02x) granted\n", flags);
+ else
+ dev_dbg(root->bus->bridge,
+ "ACPI _OSC request failed (code %d)\n", status);
+ }
+
pci_acpi_add_bus_pm_notifier(device, root->bus);
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);
@@ -603,6 +636,8 @@ static int __init acpi_pci_root_init(void)
if (acpi_pci_disabled)
return 0;
+ acpi_hest_init();
+
pci_acpi_crs_quirks();
if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
return -ENODEV;