pci-aspm.h 1.6 KB

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  1. /*
  2. * aspm.h
  3. *
  4. * PCI Express ASPM defines and function prototypes
  5. *
  6. * Copyright (C) 2007 Intel Corp.
  7. * Zhang Yanmin (yanmin.zhang@intel.com)
  8. * Shaohua Li (shaohua.li@intel.com)
  9. *
  10. * For more information, please consult the following manuals (look at
  11. * http://www.pcisig.com/ for how to get them):
  12. *
  13. * PCI Express Specification
  14. */
  15. #ifndef LINUX_ASPM_H
  16. #define LINUX_ASPM_H
  17. #include <linux/pci.h>
  18. #define PCIE_LINK_STATE_L0S 1
  19. #define PCIE_LINK_STATE_L1 2
  20. #define PCIE_LINK_STATE_CLKPM 4
  21. #ifdef CONFIG_PCIEASPM
  22. extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
  23. extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
  24. extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
  25. extern void pci_disable_link_state(struct pci_dev *pdev, int state);
  26. extern void pcie_clear_aspm(void);
  27. extern void pcie_no_aspm(void);
  28. #else
  29. static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
  30. {
  31. }
  32. static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
  33. {
  34. }
  35. static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
  36. {
  37. }
  38. static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
  39. {
  40. }
  41. static inline void pcie_clear_aspm(void)
  42. {
  43. }
  44. static inline void pcie_no_aspm(void)
  45. {
  46. }
  47. #endif
  48. #ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
  49. extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
  50. extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
  51. #else
  52. static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
  53. {
  54. }
  55. static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
  56. {
  57. }
  58. #endif
  59. #endif /* LINUX_ASPM_H */