1 files changed, 81 insertions, 0 deletions

diff --git a/arch/x86/include/asm/xen/pci.h b/arch/x86/include/asm/xen/pci.h
new file mode 100644
index 000000000000..4fbda9a3f339
--- /dev/null
+++ b/arch/x86/include/asm/xen/pci.h
@@ -0,0 +1,81 @@
+#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)
+void __init xen_setup_pirqs(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 void __init xen_setup_pirqs(void)
+{
+}
+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 -ENODEV;
+}
+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 -ENODEV;
+}
+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 */