arch/x86/include/asm/xen/pci.h

   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 #else
  19 static inline void __init xen_setup_pirqs(void)
  20 {
  21 }
  22 #endif
  23
  24 #if defined(CONFIG_PCI_MSI)
  25 #if defined(CONFIG_PCI_XEN)
  26 /* The drivers/pci/xen-pcifront.c sets this structure to
  27  * its own functions.
  28  */
  29 struct xen_pci_frontend_ops {
  30         int (*enable_msi)(struct pci_dev *dev, int vectors[]);
  31         void (*disable_msi)(struct pci_dev *dev);
  32         int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
  33         void (*disable_msix)(struct pci_dev *dev);
  34 };
  35
  36 extern struct xen_pci_frontend_ops *xen_pci_frontend;
  37
  38 static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
  39                                               int vectors[])
  40 {
  41         if (xen_pci_frontend && xen_pci_frontend->enable_msi)
  42                 return xen_pci_frontend->enable_msi(dev, vectors);
  43         return -ENODEV;
  44 }
  45 static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
  46 {
  47         if (xen_pci_frontend && xen_pci_frontend->disable_msi)
  48                         xen_pci_frontend->disable_msi(dev);
  49 }
  50 static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
  51                                                int vectors[], int nvec)
  52 {
  53         if (xen_pci_frontend && xen_pci_frontend->enable_msix)
  54                 return xen_pci_frontend->enable_msix(dev, vectors, nvec);
  55         return -ENODEV;
  56 }
  57 static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
  58 {
  59         if (xen_pci_frontend && xen_pci_frontend->disable_msix)
  60                         xen_pci_frontend->disable_msix(dev);
  61 }
  62 #endif /* CONFIG_PCI_XEN */
  63 #endif /* CONFIG_PCI_MSI */
  64
  65 #endif  /* _ASM_X86_XEN_PCI_H */