1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_XEN_PCI_H
3#define _ASM_X86_XEN_PCI_H
4
5#if defined(CONFIG_PCI_XEN)
6extern int __init pci_xen_init(void);
7extern int __init pci_xen_hvm_init(void);
8#define pci_xen 1
9#else
10#define pci_xen 0
11#define pci_xen_init (0)
12static inline int pci_xen_hvm_init(void)
13{
14	return -1;
15}
16#endif
17#if defined(CONFIG_XEN_DOM0)
18int __init pci_xen_initial_domain(void);
19int xen_find_device_domain_owner(struct pci_dev *dev);
20int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
21int xen_unregister_device_domain_owner(struct pci_dev *dev);
22#else
23static inline int __init pci_xen_initial_domain(void)
24{
25	return -1;
26}
27static inline int xen_find_device_domain_owner(struct pci_dev *dev)
28{
29	return -1;
30}
31static inline int xen_register_device_domain_owner(struct pci_dev *dev,
32						   uint16_t domain)
33{
34	return -1;
35}
36static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
37{
38	return -1;
39}
40#endif
41
42#if defined(CONFIG_PCI_MSI)
43#if defined(CONFIG_PCI_XEN)
44/* The drivers/pci/xen-pcifront.c sets this structure to
45 * its own functions.
46 */
47struct xen_pci_frontend_ops {
48	int (*enable_msi)(struct pci_dev *dev, int vectors[]);
49	void (*disable_msi)(struct pci_dev *dev);
50	int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
51	void (*disable_msix)(struct pci_dev *dev);
52};
53
54extern struct xen_pci_frontend_ops *xen_pci_frontend;
55
56static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
57					      int vectors[])
58{
59	if (xen_pci_frontend && xen_pci_frontend->enable_msi)
60		return xen_pci_frontend->enable_msi(dev, vectors);
61	return -ENOSYS;
62}
63static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
64{
65	if (xen_pci_frontend && xen_pci_frontend->disable_msi)
66			xen_pci_frontend->disable_msi(dev);
67}
68static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
69					       int vectors[], int nvec)
70{
71	if (xen_pci_frontend && xen_pci_frontend->enable_msix)
72		return xen_pci_frontend->enable_msix(dev, vectors, nvec);
73	return -ENOSYS;
74}
75static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
76{
77	if (xen_pci_frontend && xen_pci_frontend->disable_msix)
78			xen_pci_frontend->disable_msix(dev);
79}
80#endif /* CONFIG_PCI_XEN */
81#endif /* CONFIG_PCI_MSI */
82
83#endif	/* _ASM_X86_XEN_PCI_H */
84