| 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 |