1#ifndef _ASM_X86_XEN_PCI_H
2#define _ASM_X86_XEN_PCI_H
3
4#if defined(CONFIG_PCI_XEN)
5extern int __init pci_xen_init(void);
6extern int __init pci_xen_hvm_init(void);
7#define pci_xen 1
8#else
9#define pci_xen 0
10#define pci_xen_init (0)
11static inline int pci_xen_hvm_init(void)
12{
13	return -1;
14}
15#endif
16#if defined(CONFIG_XEN_DOM0)
17int __init pci_xen_initial_domain(void);
18int xen_find_device_domain_owner(struct pci_dev *dev);
19int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
20int xen_unregister_device_domain_owner(struct pci_dev *dev);
21#else
22static inline int __init pci_xen_initial_domain(void)
23{
24	return -1;
25}
26static inline int xen_find_device_domain_owner(struct pci_dev *dev)
27{
28	return -1;
29}
30static inline int xen_register_device_domain_owner(struct pci_dev *dev,
31						   uint16_t domain)
32{
33	return -1;
34}
35static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
36{
37	return -1;
38}
39#endif
40
41#if defined(CONFIG_PCI_MSI)
42#if defined(CONFIG_PCI_XEN)
43/* The drivers/pci/xen-pcifront.c sets this structure to
44 * its own functions.
45 */
46struct xen_pci_frontend_ops {
47	int (*enable_msi)(struct pci_dev *dev, int vectors[]);
48	void (*disable_msi)(struct pci_dev *dev);
49	int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
50	void (*disable_msix)(struct pci_dev *dev);
51};
52
53extern struct xen_pci_frontend_ops *xen_pci_frontend;
54
55static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
56					      int vectors[])
57{
58	if (xen_pci_frontend && xen_pci_frontend->enable_msi)
59		return xen_pci_frontend->enable_msi(dev, vectors);
60	return -ENODEV;
61}
62static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
63{
64	if (xen_pci_frontend && xen_pci_frontend->disable_msi)
65			xen_pci_frontend->disable_msi(dev);
66}
67static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
68					       int vectors[], int nvec)
69{
70	if (xen_pci_frontend && xen_pci_frontend->enable_msix)
71		return xen_pci_frontend->enable_msix(dev, vectors, nvec);
72	return -ENODEV;
73}
74static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
75{
76	if (xen_pci_frontend && xen_pci_frontend->disable_msix)
77			xen_pci_frontend->disable_msix(dev);
78}
79#endif /* CONFIG_PCI_XEN */
80#endif /* CONFIG_PCI_MSI */
81
82#endif	/* _ASM_X86_XEN_PCI_H */
83