include/linux/pci-aspm.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *      aspm.h
   4  *
   5  *      PCI Express ASPM defines and function prototypes
   6  *
   7  *      Copyright (C) 2007 Intel Corp.
   8  *              Zhang Yanmin (yanmin.zhang@intel.com)
   9  *              Shaohua Li (shaohua.li@intel.com)
  10  *
  11  *      For more information, please consult the following manuals (look at
  12  *      http://www.pcisig.com/ for how to get them):
  13  *
  14  *      PCI Express Specification
  15  */
  16
  17 #ifndef LINUX_ASPM_H
  18 #define LINUX_ASPM_H
  19
  20 #include <linux/pci.h>
  21
  22 #define PCIE_LINK_STATE_L0S     1
  23 #define PCIE_LINK_STATE_L1      2
  24 #define PCIE_LINK_STATE_CLKPM   4
  25
  26 #ifdef CONFIG_PCIEASPM
  27 void pcie_aspm_init_link_state(struct pci_dev *pdev);
  28 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
  29 void pcie_aspm_pm_state_change(struct pci_dev *pdev);
  30 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
  31 void pci_disable_link_state(struct pci_dev *pdev, int state);
  32 void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
  33 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_no_aspm(void)
  51 {
  52 }
  53 #endif
  54
  55 #ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
  56 void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
  57 void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
  58 #else
  59 static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
  60 {
  61 }
  62 static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
  63 {
  64 }
  65 #endif
  66 #endif /* LINUX_ASPM_H */