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android_kernel_...
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arch
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x86
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include
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asm
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xen
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pci.h

pci.h 1.8 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #ifndef _ASM_X86_XEN_PCI_H
    3. 

  3. #define _ASM_X86_XEN_PCI_H
    4. 

  4. 

  5. #if defined(CONFIG_PCI_XEN)
    6. 

  6. extern int __init pci_xen_init(void);
    7. 

  7. extern int __init pci_xen_hvm_init(void);
    8. 

  8. #define pci_xen 1
    9. 

  9. #else
    10. 

  10. #define pci_xen 0
    11. 

  11. #define pci_xen_init (0)
    12. 

  12. static inline int pci_xen_hvm_init(void)
    13. 

  13. {
    14. 

  14. 	return -1;
    15. 

  15. }
    16. 

  16. #endif
    17. 

  17. #ifdef CONFIG_XEN_PV_DOM0
    18. 

  18. int __init pci_xen_initial_domain(void);
    19. 

  19. #else
    20. 

  20. static inline int __init pci_xen_initial_domain(void)
    21. 

  21. {
    22. 

  22. 	return -1;
    23. 

  23. }
    24. 

  24. #endif
    25. 

  25. 

  26. #if defined(CONFIG_PCI_MSI)
    27. 

  27. #if defined(CONFIG_PCI_XEN)
    28. 

  28. /* The drivers/pci/xen-pcifront.c sets this structure to
    29. 

  29.  * its own functions.
    30. 

  30.  */
    31. 

  31. struct xen_pci_frontend_ops {
    32. 

  32. 	int (*enable_msi)(struct pci_dev *dev, int vectors[]);
    33. 

  33. 	void (*disable_msi)(struct pci_dev *dev);
    34. 

  34. 	int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
    35. 

  35. 	void (*disable_msix)(struct pci_dev *dev);
    36. 

  36. };
    37. 

  37. 

  38. extern struct xen_pci_frontend_ops *xen_pci_frontend;
    39. 

  39. 

  40. static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
    41. 

  41. 					      int vectors[])
    42. 

  42. {
    43. 

  43. 	if (xen_pci_frontend && xen_pci_frontend->enable_msi)
    44. 

  44. 		return xen_pci_frontend->enable_msi(dev, vectors);
    45. 

  45. 	return -ENOSYS;
    46. 

  46. }
    47. 

  47. static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
    48. 

  48. {
    49. 

  49. 	if (xen_pci_frontend && xen_pci_frontend->disable_msi)
    50. 

  50. 			xen_pci_frontend->disable_msi(dev);
    51. 

  51. }
    52. 

  52. static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
    53. 

  53. 					       int vectors[], int nvec)
    54. 

  54. {
    55. 

  55. 	if (xen_pci_frontend && xen_pci_frontend->enable_msix)
    56. 

  56. 		return xen_pci_frontend->enable_msix(dev, vectors, nvec);
    57. 

  57. 	return -ENOSYS;
    58. 

  58. }
    59. 

  59. static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
    60. 

  60. {
    61. 

  61. 	if (xen_pci_frontend && xen_pci_frontend->disable_msix)
    62. 

  62. 			xen_pci_frontend->disable_msix(dev);
    63. 

  63. }
    64. 

  64. #endif /* CONFIG_PCI_XEN */
    65. 

  65. #endif /* CONFIG_PCI_MSI */
    66. 

  66. 

  67. #endif	/* _ASM_X86_XEN_PCI_H */
    68.