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e28c31a9 WH |
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); |