include/linux/pci-aspm.h

   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
  16 #ifndef LINUX_ASPM_H
  17 #define LINUX_ASPM_H
  18
  19 #include <linux/pci.h>
  20
  21 #define PCIE_LINK_STATE_L0S     1
  22 #define PCIE_LINK_STATE_L1      2
  23 #define PCIE_LINK_STATE_CLKPM   4
  24
  25 #ifdef CONFIG_PCIEASPM
  26 extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
  27 extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
  28 extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
  29 extern void pci_disable_link_state(struct pci_dev *pdev, int state);
  30 #else
  31 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
  32 {
  33 }
  34 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
  35 {
  36 }
  37 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
  38 {
  39 }
  40 static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
  41 {
  42 }
  43 #endif
  44
  45 #ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
  46 extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
  47 extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
  48 #else
  49 static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
  50 {
  51 }
  52 static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
  53 {
  54 }
  55 #endif
  56 #endif /* LINUX_ASPM_H */