LXR linux/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
  26void pcie_aspm_init_link_state(struct pci_dev *pdev);
  27void pcie_aspm_exit_link_state(struct pci_dev *pdev);
  28void pcie_aspm_pm_state_change(struct pci_dev *pdev);
  29void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
  30void pci_disable_link_state(struct pci_dev *pdev, int state);
  31void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
  32void pcie_no_aspm(void);
  33#else
  34static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
  35{
  36}
  37static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
  38{
  39}
  40static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
  41{
  42}
  43static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
  44{
  45}
  46static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
  47{
  48}
  49static inline void pcie_no_aspm(void)
  50{
  51}
  52#endif
  53
  54#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
  55void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
  56void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
  57#else
  58static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
  59{
  60}
  61static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
  62{
  63}
  64#endif
  65#endif /* LINUX_ASPM_H */
  66