| Weidong Han | e28c31a | 2010-10-27 17:55:04 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009, Intel Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Author: Weidong Han <weidong.han@intel.com> |
| 18 | */ |
| 19 | |
| 20 | #include <linux/pci.h> |
| 21 | #include <xen/xen.h> |
| 22 | #include <xen/interface/physdev.h> |
| 23 | #include <xen/interface/xen.h> |
| 24 | |
| 25 | #include <asm/xen/hypervisor.h> |
| 26 | #include <asm/xen/hypercall.h> |
| 27 | #include "../pci/pci.h" |
| 28 | |
| 29 | static int xen_add_device(struct device *dev) |
| 30 | { |
| 31 | int r; |
| 32 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 33 | |
| 34 | #ifdef CONFIG_PCI_IOV |
| 35 | if (pci_dev->is_virtfn) { |
| 36 | struct physdev_manage_pci_ext manage_pci_ext = { |
| 37 | .bus = pci_dev->bus->number, |
| 38 | .devfn = pci_dev->devfn, |
| 39 | .is_virtfn = 1, |
| 40 | .physfn.bus = pci_dev->physfn->bus->number, |
| 41 | .physfn.devfn = pci_dev->physfn->devfn, |
| 42 | }; |
| 43 | |
| 44 | r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext, |
| 45 | &manage_pci_ext); |
| 46 | } else |
| 47 | #endif |
| 48 | if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) { |
| 49 | struct physdev_manage_pci_ext manage_pci_ext = { |
| 50 | .bus = pci_dev->bus->number, |
| 51 | .devfn = pci_dev->devfn, |
| 52 | .is_extfn = 1, |
| 53 | }; |
| 54 | |
| 55 | r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext, |
| 56 | &manage_pci_ext); |
| 57 | } else { |
| 58 | struct physdev_manage_pci manage_pci = { |
| 59 | .bus = pci_dev->bus->number, |
| 60 | .devfn = pci_dev->devfn, |
| 61 | }; |
| 62 | |
| 63 | r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add, |
| 64 | &manage_pci); |
| 65 | } |
| 66 | |
| 67 | return r; |
| 68 | } |
| 69 | |
| 70 | static int xen_remove_device(struct device *dev) |
| 71 | { |
| 72 | int r; |
| 73 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 74 | struct physdev_manage_pci manage_pci; |
| 75 | |
| 76 | manage_pci.bus = pci_dev->bus->number; |
| 77 | manage_pci.devfn = pci_dev->devfn; |
| 78 | |
| 79 | r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove, |
| 80 | &manage_pci); |
| 81 | |
| 82 | return r; |
| 83 | } |
| 84 | |
| 85 | static int xen_pci_notifier(struct notifier_block *nb, |
| 86 | unsigned long action, void *data) |
| 87 | { |
| 88 | struct device *dev = data; |
| 89 | int r = 0; |
| 90 | |
| 91 | switch (action) { |
| 92 | case BUS_NOTIFY_ADD_DEVICE: |
| 93 | r = xen_add_device(dev); |
| 94 | break; |
| 95 | case BUS_NOTIFY_DEL_DEVICE: |
| 96 | r = xen_remove_device(dev); |
| 97 | break; |
| 98 | default: |
| 99 | break; |
| 100 | } |
| 101 | |
| 102 | return r; |
| 103 | } |
| 104 | |
| 105 | struct notifier_block device_nb = { |
| 106 | .notifier_call = xen_pci_notifier, |
| 107 | }; |
| 108 | |
| 109 | static int __init register_xen_pci_notifier(void) |
| 110 | { |
| 111 | if (!xen_initial_domain()) |
| 112 | return 0; |
| 113 | |
| 114 | return bus_register_notifier(&pci_bus_type, &device_nb); |
| 115 | } |
| 116 | |
| 117 | arch_initcall(register_xen_pci_notifier); |