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