1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _ASM_X86_XEN_PCI_H
3*4882a593Smuzhiyun #define _ASM_X86_XEN_PCI_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #if defined(CONFIG_PCI_XEN)
6*4882a593Smuzhiyun extern int __init pci_xen_init(void);
7*4882a593Smuzhiyun extern int __init pci_xen_hvm_init(void);
8*4882a593Smuzhiyun #define pci_xen 1
9*4882a593Smuzhiyun #else
10*4882a593Smuzhiyun #define pci_xen 0
11*4882a593Smuzhiyun #define pci_xen_init (0)
pci_xen_hvm_init(void)12*4882a593Smuzhiyun static inline int pci_xen_hvm_init(void)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun return -1;
15*4882a593Smuzhiyun }
16*4882a593Smuzhiyun #endif
17*4882a593Smuzhiyun #if defined(CONFIG_XEN_DOM0)
18*4882a593Smuzhiyun int __init pci_xen_initial_domain(void);
19*4882a593Smuzhiyun int xen_find_device_domain_owner(struct pci_dev *dev);
20*4882a593Smuzhiyun int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain);
21*4882a593Smuzhiyun int xen_unregister_device_domain_owner(struct pci_dev *dev);
22*4882a593Smuzhiyun #else
pci_xen_initial_domain(void)23*4882a593Smuzhiyun static inline int __init pci_xen_initial_domain(void)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return -1;
26*4882a593Smuzhiyun }
xen_find_device_domain_owner(struct pci_dev * dev)27*4882a593Smuzhiyun static inline int xen_find_device_domain_owner(struct pci_dev *dev)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun return -1;
30*4882a593Smuzhiyun }
xen_register_device_domain_owner(struct pci_dev * dev,uint16_t domain)31*4882a593Smuzhiyun static inline int xen_register_device_domain_owner(struct pci_dev *dev,
32*4882a593Smuzhiyun uint16_t domain)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun return -1;
35*4882a593Smuzhiyun }
xen_unregister_device_domain_owner(struct pci_dev * dev)36*4882a593Smuzhiyun static inline int xen_unregister_device_domain_owner(struct pci_dev *dev)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun return -1;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun #endif
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun #if defined(CONFIG_PCI_MSI)
43*4882a593Smuzhiyun #if defined(CONFIG_PCI_XEN)
44*4882a593Smuzhiyun /* The drivers/pci/xen-pcifront.c sets this structure to
45*4882a593Smuzhiyun * its own functions.
46*4882a593Smuzhiyun */
47*4882a593Smuzhiyun struct xen_pci_frontend_ops {
48*4882a593Smuzhiyun int (*enable_msi)(struct pci_dev *dev, int vectors[]);
49*4882a593Smuzhiyun void (*disable_msi)(struct pci_dev *dev);
50*4882a593Smuzhiyun int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
51*4882a593Smuzhiyun void (*disable_msix)(struct pci_dev *dev);
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun extern struct xen_pci_frontend_ops *xen_pci_frontend;
55*4882a593Smuzhiyun
xen_pci_frontend_enable_msi(struct pci_dev * dev,int vectors[])56*4882a593Smuzhiyun static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
57*4882a593Smuzhiyun int vectors[])
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun if (xen_pci_frontend && xen_pci_frontend->enable_msi)
60*4882a593Smuzhiyun return xen_pci_frontend->enable_msi(dev, vectors);
61*4882a593Smuzhiyun return -ENOSYS;
62*4882a593Smuzhiyun }
xen_pci_frontend_disable_msi(struct pci_dev * dev)63*4882a593Smuzhiyun static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun if (xen_pci_frontend && xen_pci_frontend->disable_msi)
66*4882a593Smuzhiyun xen_pci_frontend->disable_msi(dev);
67*4882a593Smuzhiyun }
xen_pci_frontend_enable_msix(struct pci_dev * dev,int vectors[],int nvec)68*4882a593Smuzhiyun static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
69*4882a593Smuzhiyun int vectors[], int nvec)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun if (xen_pci_frontend && xen_pci_frontend->enable_msix)
72*4882a593Smuzhiyun return xen_pci_frontend->enable_msix(dev, vectors, nvec);
73*4882a593Smuzhiyun return -ENOSYS;
74*4882a593Smuzhiyun }
xen_pci_frontend_disable_msix(struct pci_dev * dev)75*4882a593Smuzhiyun static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun if (xen_pci_frontend && xen_pci_frontend->disable_msix)
78*4882a593Smuzhiyun xen_pci_frontend->disable_msix(dev);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun #endif /* CONFIG_PCI_XEN */
81*4882a593Smuzhiyun #endif /* CONFIG_PCI_MSI */
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun #endif /* _ASM_X86_XEN_PCI_H */
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