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 #ifdef CONFIG_XEN_PV_DOM0
18 int __init pci_xen_initial_domain(void);
19 #else
pci_xen_initial_domain(void)20 static inline int __init pci_xen_initial_domain(void)
21 {
22 return -1;
23 }
24 #endif
25 #ifdef CONFIG_XEN_DOM0
26 int xen_find_device_domain_owner(struct pci_dev *dev);
27 int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
28 int xen_unregister_device_domain_owner(struct pci_dev *dev);
29 #else
xen_find_device_domain_owner(struct pci_dev * dev)30 static inline int xen_find_device_domain_owner(struct pci_dev *dev)
31 {
32 return -1;
33 }
xen_register_device_domain_owner(struct pci_dev * dev,uint16_t domain)34 static inline int xen_register_device_domain_owner(struct pci_dev *dev,
35 uint16_t domain)
36 {
37 return -1;
38 }
xen_unregister_device_domain_owner(struct pci_dev * dev)39 static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
40 {
41 return -1;
42 }
43 #endif
44
45 #if defined(CONFIG_PCI_MSI)
46 #if defined(CONFIG_PCI_XEN)
47 /* The drivers/pci/xen-pcifront.c sets this structure to
48 * its own functions.
49 */
50 struct xen_pci_frontend_ops {
51 int (*enable_msi)(struct pci_dev *dev, int vectors[]);
52 void (*disable_msi)(struct pci_dev *dev);
53 int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
54 void (*disable_msix)(struct pci_dev *dev);
55 };
56
57 extern struct xen_pci_frontend_ops *xen_pci_frontend;
58
xen_pci_frontend_enable_msi(struct pci_dev * dev,int vectors[])59 static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
60 int vectors[])
61 {
62 if (xen_pci_frontend && xen_pci_frontend->enable_msi)
63 return xen_pci_frontend->enable_msi(dev, vectors);
64 return -ENOSYS;
65 }
xen_pci_frontend_disable_msi(struct pci_dev * dev)66 static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
67 {
68 if (xen_pci_frontend && xen_pci_frontend->disable_msi)
69 xen_pci_frontend->disable_msi(dev);
70 }
xen_pci_frontend_enable_msix(struct pci_dev * dev,int vectors[],int nvec)71 static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
72 int vectors[], int nvec)
73 {
74 if (xen_pci_frontend && xen_pci_frontend->enable_msix)
75 return xen_pci_frontend->enable_msix(dev, vectors, nvec);
76 return -ENOSYS;
77 }
xen_pci_frontend_disable_msix(struct pci_dev * dev)78 static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
79 {
80 if (xen_pci_frontend && xen_pci_frontend->disable_msix)
81 xen_pci_frontend->disable_msix(dev);
82 }
83 #endif /* CONFIG_PCI_XEN */
84 #endif /* CONFIG_PCI_MSI */
85
86 #endif /* _ASM_X86_XEN_PCI_H */
87