pci.h

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#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)
int __init pci_xen_initial_domain(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 int __init pci_xen_initial_domain(void)
{
    return -1;
}
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 */