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) |
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 |
20 | static inline int __init pci_xen_initial_domain(void) |
21 | { |
22 | return -1; |
23 | } |
24 | #endif |
25 | |
26 | #if defined(CONFIG_PCI_MSI) |
27 | #if defined(CONFIG_PCI_XEN) |
28 | /* The drivers/pci/xen-pcifront.c sets this structure to |
29 | * its own functions. |
30 | */ |
31 | struct xen_pci_frontend_ops { |
32 | int (*enable_msi)(struct pci_dev *dev, int vectors[]); |
33 | void (*disable_msi)(struct pci_dev *dev); |
34 | int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec); |
35 | void (*disable_msix)(struct pci_dev *dev); |
36 | }; |
37 | |
38 | extern struct xen_pci_frontend_ops *xen_pci_frontend; |
39 | |
40 | static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev, |
41 | int vectors[]) |
42 | { |
43 | if (xen_pci_frontend && xen_pci_frontend->enable_msi) |
44 | return xen_pci_frontend->enable_msi(dev, vectors); |
45 | return -ENOSYS; |
46 | } |
47 | static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev) |
48 | { |
49 | if (xen_pci_frontend && xen_pci_frontend->disable_msi) |
50 | xen_pci_frontend->disable_msi(dev); |
51 | } |
52 | static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev, |
53 | int vectors[], int nvec) |
54 | { |
55 | if (xen_pci_frontend && xen_pci_frontend->enable_msix) |
56 | return xen_pci_frontend->enable_msix(dev, vectors, nvec); |
57 | return -ENOSYS; |
58 | } |
59 | static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev) |
60 | { |
61 | if (xen_pci_frontend && xen_pci_frontend->disable_msix) |
62 | xen_pci_frontend->disable_msix(dev); |
63 | } |
64 | #endif /* CONFIG_PCI_XEN */ |
65 | #endif /* CONFIG_PCI_MSI */ |
66 | |
67 | #endif /* _ASM_X86_XEN_PCI_H */ |
68 |