1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_XEN_PCI_H
3 #define _ASM_X86_XEN_PCI_H
4
5 #if defined(CONFIG_PCI_XEN)
6 extern int __init pci_xen_init(void);
7 extern int __init pci_xen_hvm_init(void);
8 #define pci_xen 1
9 #else
10 #define pci_xen 0
11 #define pci_xen_init (0)
pci_xen_hvm_init(void)12 static inline int pci_xen_hvm_init(void)
13 {
14 return -1;
15 }
16 #endif
17 #if defined(CONFIG_XEN_DOM0)
18 int __init pci_xen_initial_domain(void);
19 int xen_find_device_domain_owner(struct pci_dev *dev);
20 int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
21 int xen_unregister_device_domain_owner(struct pci_dev *dev);
22 #else
pci_xen_initial_domain(void)23 static inline int __init pci_xen_initial_domain(void)
24 {
25 return -1;
26 }
xen_find_device_domain_owner(struct pci_dev * dev)27 static inline int xen_find_device_domain_owner(struct pci_dev *dev)
28 {
29 return -1;
30 }
xen_register_device_domain_owner(struct pci_dev * dev,uint16_t domain)31 static inline int xen_register_device_domain_owner(struct pci_dev *dev,
32 uint16_t domain)
33 {
34 return -1;
35 }
xen_unregister_device_domain_owner(struct pci_dev * dev)36 static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
37 {
38 return -1;
39 }
40 #endif
41
42 #if defined(CONFIG_PCI_MSI)
43 #if defined(CONFIG_PCI_XEN)
44 /* The drivers/pci/xen-pcifront.c sets this structure to
45 * its own functions.
46 */
47 struct xen_pci_frontend_ops {
48 int (*enable_msi)(struct pci_dev *dev, int vectors[]);
49 void (*disable_msi)(struct pci_dev *dev);
50 int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
51 void (*disable_msix)(struct pci_dev *dev);
52 };
53
54 extern struct xen_pci_frontend_ops *xen_pci_frontend;
55
xen_pci_frontend_enable_msi(struct pci_dev * dev,int vectors[])56 static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
57 int vectors[])
58 {
59 if (xen_pci_frontend && xen_pci_frontend->enable_msi)
60 return xen_pci_frontend->enable_msi(dev, vectors);
61 return -ENOSYS;
62 }
xen_pci_frontend_disable_msi(struct pci_dev * dev)63 static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
64 {
65 if (xen_pci_frontend && xen_pci_frontend->disable_msi)
66 xen_pci_frontend->disable_msi(dev);
67 }
xen_pci_frontend_enable_msix(struct pci_dev * dev,int vectors[],int nvec)68 static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
69 int vectors[], int nvec)
70 {
71 if (xen_pci_frontend && xen_pci_frontend->enable_msix)
72 return xen_pci_frontend->enable_msix(dev, vectors, nvec);
73 return -ENOSYS;
74 }
xen_pci_frontend_disable_msix(struct pci_dev * dev)75 static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
76 {
77 if (xen_pci_frontend && xen_pci_frontend->disable_msix)
78 xen_pci_frontend->disable_msix(dev);
79 }
80 #endif /* CONFIG_PCI_XEN */
81 #endif /* CONFIG_PCI_MSI */
82
83 #endif /* _ASM_X86_XEN_PCI_H */
84