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 pcie_aspm_powersave_config_link(struct pci_dev *pdev);
  30 extern void pci_disable_link_state(struct pci_dev *pdev, int state);
  31 extern void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
  32 extern void pcie_clear_aspm(void);
  33 extern void pcie_no_aspm(void);
  34 #else
  35 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
  36 {
  37 }
  38 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
  39 {
  40 }
  41 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
  42 {
  43 }
  44 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
  45 {
  46 }
  47 static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
  48 {
  49 }
  50 static inline void pcie_clear_aspm(void)
  51 {
  52 }
  53 static inline void pcie_no_aspm(void)
  54 {
  55 }
  56 #endif
  57
  58 #ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
  59 extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
  60 extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
  61 #else
  62 static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
  63 {
  64 }
  65 static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
  66 {
  67 }
  68 #endif
  69 #endif /* LINUX_ASPM_H */