1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_XEN_PCI_H
3 #define _ASM_X86_XEN_PCI_H
5 #if defined(CONFIG_PCI_XEN)
6 extern int __init pci_xen_init(void);
7 extern int __init pci_xen_hvm_init(void);
11 #define pci_xen_init (0)
12 static inline int pci_xen_hvm_init(void)
17 #ifdef CONFIG_XEN_PV_DOM0
18 int __init pci_xen_initial_domain(void);
20 static inline int __init pci_xen_initial_domain(void)
25 #ifdef CONFIG_XEN_DOM0
26 int xen_find_device_domain_owner(struct pci_dev *dev);
27 int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
28 int xen_unregister_device_domain_owner(struct pci_dev *dev);
30 static inline int xen_find_device_domain_owner(struct pci_dev *dev)
34 static inline int xen_register_device_domain_owner(struct pci_dev *dev,
39 static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
45 #if defined(CONFIG_PCI_MSI)
46 #if defined(CONFIG_PCI_XEN)
47 /* The drivers/pci/xen-pcifront.c sets this structure to
50 struct xen_pci_frontend_ops {
51 int (*enable_msi)(struct pci_dev *dev, int vectors[]);
52 void (*disable_msi)(struct pci_dev *dev);
53 int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
54 void (*disable_msix)(struct pci_dev *dev);
57 extern struct xen_pci_frontend_ops *xen_pci_frontend;
59 static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
62 if (xen_pci_frontend && xen_pci_frontend->enable_msi)
63 return xen_pci_frontend->enable_msi(dev, vectors);
66 static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
68 if (xen_pci_frontend && xen_pci_frontend->disable_msi)
69 xen_pci_frontend->disable_msi(dev);
71 static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
72 int vectors[], int nvec)
74 if (xen_pci_frontend && xen_pci_frontend->enable_msix)
75 return xen_pci_frontend->enable_msix(dev, vectors, nvec);
78 static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
80 if (xen_pci_frontend && xen_pci_frontend->disable_msix)
81 xen_pci_frontend->disable_msix(dev);
83 #endif /* CONFIG_PCI_XEN */
84 #endif /* CONFIG_PCI_MSI */
86 #endif /* _ASM_X86_XEN_PCI_H */