56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
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/*
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* Access ACPI _OSC method
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*
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* Copyright (C) 2006 Intel Corp.
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* Tom Long Nguyen (tom.l.nguyen@intel.com)
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* Zhang Yanmin (yanmin.zhang@intel.com)
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*
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/suspend.h>
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#include <linux/acpi.h>
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#include <linux/pci-acpi.h>
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#include <linux/delay.h>
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#include "aerdrv.h"
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/**
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* aer_osc_setup - run ACPI _OSC method
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* @pciedev: pcie_device which AER is being enabled on
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*
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* @return: Zero on success. Nonzero otherwise.
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*
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* Invoked when PCIE bus loads AER service driver. To avoid conflict with
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* BIOS AER support requires BIOS to yield AER control to OS native driver.
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**/
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int aer_osc_setup(struct pcie_device *pciedev)
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{
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acpi_status status = AE_NOT_FOUND;
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struct pci_dev *pdev = pciedev->port;
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acpi_handle handle = NULL;
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if (acpi_pci_disabled)
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return -1;
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handle = acpi_find_root_bridge_handle(pdev);
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if (handle) {
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status = acpi_pci_osc_control_set(handle,
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OSC_PCI_EXPRESS_AER_CONTROL |
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OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
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}
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if (ACPI_FAILURE(status)) {
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dev_printk(KERN_DEBUG, &pciedev->device, "AER service couldn't "
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"init device: %s\n",
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(status == AE_SUPPORT || status == AE_NOT_FOUND) ?
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"no _OSC support" : "_OSC failed");
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return -1;
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}
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return 0;
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}
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