portdrv_acpi.c

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/*
 * PCIe Port Native Services Support, ACPI-Related Part
 *
 * Copyright (C) 2010 Rafael J. Wysocki <[email protected]>, Novell Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License V2.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci-acpi.h>
#include <linux/pcieport_if.h>

#include "aer/aerdrv.h"
#include "../pci.h"

int pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask)
{
    struct acpi_pci_root *root;
    acpi_handle handle;
    u32 flags;

    if (acpi_pci_disabled)
        return 0;

    handle = acpi_find_root_bridge_handle(port);
    if (!handle)
        return -EINVAL;

    root = acpi_pci_find_root(handle);
    if (!root)
        return -ENODEV;

    flags = root->osc_control_set;

    *srv_mask = PCIE_PORT_SERVICE_VC;
    if (flags & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)
        *srv_mask |= PCIE_PORT_SERVICE_HP;
    if (flags & OSC_PCI_EXPRESS_PME_CONTROL)
        *srv_mask |= PCIE_PORT_SERVICE_PME;
    if (flags & OSC_PCI_EXPRESS_AER_CONTROL)
        *srv_mask |= PCIE_PORT_SERVICE_AER;

    return 0;
}