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Diffstat (limited to 'arch/x86/include/asm/xen/pci.h')
-rw-r--r--arch/x86/include/asm/xen/pci.h53
1 files changed, 53 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..449c82f71677
--- /dev/null
+++ b/arch/x86/include/asm/xen/pci.h
@@ -0,0 +1,53 @@
+#ifndef _ASM_X86_XEN_PCI_H
+#define _ASM_X86_XEN_PCI_H
+
+#if defined(CONFIG_PCI_XEN)
+extern int __init pci_xen_init(void);
+#define pci_xen 1
+#else
+#define pci_xen 0
+#define pci_xen_init (0)
+#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 */