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#ifdef CONFIG_XEN_PV_DOM0
18int __init pci_xen_initial_domain(void);
19#else
20static inline int __init pci_xen_initial_domain(void)
21{
22 return -1;
23}
24#endif
25
26#if defined(CONFIG_PCI_MSI)
27#if defined(CONFIG_PCI_XEN)
28/* The drivers/pci/xen-pcifront.c sets this structure to
29 * its own functions.
30 */
31struct xen_pci_frontend_ops {
32 int (*enable_msi)(struct pci_dev *dev, int vectors[]);
33 void (*disable_msi)(struct pci_dev *dev);
34 int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
35 void (*disable_msix)(struct pci_dev *dev);
36};
37
38extern struct xen_pci_frontend_ops *xen_pci_frontend;
39
40static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
41 int vectors[])
42{
43 if (xen_pci_frontend && xen_pci_frontend->enable_msi)
44 return xen_pci_frontend->enable_msi(dev, vectors);
45 return -ENOSYS;
46}
47static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
48{
49 if (xen_pci_frontend && xen_pci_frontend->disable_msi)
50 xen_pci_frontend->disable_msi(dev);
51}
52static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
53 int vectors[], int nvec)
54{
55 if (xen_pci_frontend && xen_pci_frontend->enable_msix)
56 return xen_pci_frontend->enable_msix(dev, vectors, nvec);
57 return -ENOSYS;
58}
59static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
60{
61 if (xen_pci_frontend && xen_pci_frontend->disable_msix)
62 xen_pci_frontend->disable_msix(dev);
63}
64#endif /* CONFIG_PCI_XEN */
65#endif /* CONFIG_PCI_MSI */
66
67#endif /* _ASM_X86_XEN_PCI_H */
68

source code of linux/arch/x86/include/asm/xen/pci.h