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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_XEN_PCI_H #define _ASM_X86_XEN_PCI_H #if defined(CONFIG_PCI_XEN) extern int __init pci_xen_init(void); extern int __init pci_xen_hvm_init(void); #define pci_xen 1 #else #define pci_xen 0 #define pci_xen_init (0) static inline int pci_xen_hvm_init(void) { return -1; } #endif #if defined(CONFIG_XEN_DOM0) int __init pci_xen_initial_domain(void); int xen_find_device_domain_owner(struct pci_dev *dev); int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain); int xen_unregister_device_domain_owner(struct pci_dev *dev); #else static inline int __init pci_xen_initial_domain(void) { return -1; } static inline int xen_find_device_domain_owner(struct pci_dev *dev) { return -1; } static inline int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) { return -1; } static inline int xen_unregister_device_domain_owner(struct pci_dev *dev) { return -1; } #endif #if defined(CONFIG_PCI_MSI) #if defined(CONFIG_PCI_XEN) /* The drivers/pci/xen-pcifront.c sets this structure to * its own functions. */ struct xen_pci_frontend_ops { int (*enable_msi)(struct pci_dev *dev, int vectors[]); void (*disable_msi)(struct pci_dev *dev); int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec); void (*disable_msix)(struct pci_dev *dev); }; extern struct xen_pci_frontend_ops *xen_pci_frontend; static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev, int vectors[]) { if (xen_pci_frontend && xen_pci_frontend->enable_msi) return xen_pci_frontend->enable_msi(dev, vectors); return -ENOSYS; } static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev) { if (xen_pci_frontend && xen_pci_frontend->disable_msi) xen_pci_frontend->disable_msi(dev); } static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev, int vectors[], int nvec) { if (xen_pci_frontend && xen_pci_frontend->enable_msix) return xen_pci_frontend->enable_msix(dev, vectors, nvec); return -ENOSYS; } static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev) { if (xen_pci_frontend && xen_pci_frontend->disable_msix) xen_pci_frontend->disable_msix(dev); } #endif /* CONFIG_PCI_XEN */ #endif /* CONFIG_PCI_MSI */ #endif /* _ASM_X86_XEN_PCI_H */