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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7db78a9c86
* pci/misc: PCI/ACPI: Notify PCI devices when their power resource is turned on PCI: Add GPL license for drivers/pci/ioapic module PCI: Fix bit definitions of PCI_EXP_LNKCAP2 register
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/pci-acpi.h>
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#include <linux/acpi.h>
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#include <linux/pm_runtime.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define _COMPONENT ACPI_PCI_COMPONENT
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ACPI_MODULE_NAME("pci_bind");
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static int acpi_pci_unbind(struct acpi_device *device)
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{
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struct pci_dev *dev;
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dev = acpi_get_pci_dev(device->handle);
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if (!dev)
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goto out;
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device_set_run_wake(&dev->dev, false);
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pci_acpi_remove_pm_notifier(device);
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acpi_power_resource_unregister_device(&dev->dev, device->handle);
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if (!dev->subordinate)
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goto out;
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acpi_pci_irq_del_prt(pci_domain_nr(dev->bus), dev->subordinate->number);
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device->ops.bind = NULL;
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device->ops.unbind = NULL;
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out:
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pci_dev_put(dev);
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return 0;
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}
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static int acpi_pci_bind(struct acpi_device *device)
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{
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acpi_status status;
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acpi_handle handle;
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unsigned char bus;
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struct pci_dev *dev;
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dev = acpi_get_pci_dev(device->handle);
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if (!dev)
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return 0;
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pci_acpi_add_pm_notifier(device, dev);
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acpi_power_resource_register_device(&dev->dev, device->handle);
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if (device->wakeup.flags.run_wake)
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device_set_run_wake(&dev->dev, true);
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/*
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* Install the 'bind' function to facilitate callbacks for
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* children of the P2P bridge.
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*/
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if (dev->subordinate) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device %04x:%02x:%02x.%d is a PCI bridge\n",
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pci_domain_nr(dev->bus), dev->bus->number,
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PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
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device->ops.bind = acpi_pci_bind;
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device->ops.unbind = acpi_pci_unbind;
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}
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/*
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* Evaluate and parse _PRT, if exists. This code allows parsing of
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* _PRT objects within the scope of non-bridge devices. Note that
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* _PRTs within the scope of a PCI bridge assume the bridge's
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* subordinate bus number.
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*
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* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
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*/
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status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
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if (ACPI_FAILURE(status))
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goto out;
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if (dev->subordinate)
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bus = dev->subordinate->number;
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else
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bus = dev->bus->number;
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acpi_pci_irq_add_prt(device->handle, pci_domain_nr(dev->bus), bus);
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out:
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pci_dev_put(dev);
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return 0;
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}
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int acpi_pci_bind_root(struct acpi_device *device)
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{
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device->ops.bind = acpi_pci_bind;
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device->ops.unbind = acpi_pci_unbind;
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return 0;
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}
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