118 строки
2.8 KiB
C
118 строки
2.8 KiB
C
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/*
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* Copyright (c) 2009, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Author: Weidong Han <weidong.han@intel.com>
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*/
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#include <linux/pci.h>
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#include <xen/xen.h>
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#include <xen/interface/physdev.h>
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#include <xen/interface/xen.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/hypercall.h>
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#include "../pci/pci.h"
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static int xen_add_device(struct device *dev)
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{
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int r;
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struct pci_dev *pci_dev = to_pci_dev(dev);
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#ifdef CONFIG_PCI_IOV
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if (pci_dev->is_virtfn) {
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struct physdev_manage_pci_ext manage_pci_ext = {
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.bus = pci_dev->bus->number,
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.devfn = pci_dev->devfn,
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.is_virtfn = 1,
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.physfn.bus = pci_dev->physfn->bus->number,
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.physfn.devfn = pci_dev->physfn->devfn,
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};
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r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
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&manage_pci_ext);
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} else
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#endif
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if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) {
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struct physdev_manage_pci_ext manage_pci_ext = {
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.bus = pci_dev->bus->number,
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.devfn = pci_dev->devfn,
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.is_extfn = 1,
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};
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r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
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&manage_pci_ext);
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} else {
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struct physdev_manage_pci manage_pci = {
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.bus = pci_dev->bus->number,
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.devfn = pci_dev->devfn,
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};
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r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add,
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&manage_pci);
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}
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return r;
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}
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static int xen_remove_device(struct device *dev)
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{
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int r;
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct physdev_manage_pci manage_pci;
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manage_pci.bus = pci_dev->bus->number;
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manage_pci.devfn = pci_dev->devfn;
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r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
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&manage_pci);
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return r;
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}
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static int xen_pci_notifier(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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struct device *dev = data;
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int r = 0;
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switch (action) {
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case BUS_NOTIFY_ADD_DEVICE:
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r = xen_add_device(dev);
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break;
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case BUS_NOTIFY_DEL_DEVICE:
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r = xen_remove_device(dev);
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break;
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default:
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break;
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}
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return r;
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}
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struct notifier_block device_nb = {
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.notifier_call = xen_pci_notifier,
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};
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static int __init register_xen_pci_notifier(void)
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{
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if (!xen_initial_domain())
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return 0;
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return bus_register_notifier(&pci_bus_type, &device_nb);
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}
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arch_initcall(register_xen_pci_notifier);
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