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