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