LXR linux/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)
   5extern int __init pci_xen_init(void);
   6extern 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)
  11static inline int pci_xen_hvm_init(void)
  12{
  13        return -1;
  14}
  15#endif
  16#if defined(CONFIG_XEN_DOM0)
  17void __init xen_setup_pirqs(void);
  18#else
  19static 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 */
  29struct 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
  36extern struct xen_pci_frontend_ops *xen_pci_frontend;
  37
  38static 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}
  45static 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}
  50static 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}
  57static 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 */
  66