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 pci_disable_link_state(struct pci_dev *pdev, int state);
  28 void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
  29 void pcie_no_aspm(void);
  30 #else
  31 static inline void pci_disable_link_state(struct pci_dev *pdev, int state) { }
  32 static inline void pcie_no_aspm(void) { }
  33 #endif
  34
  35 #endif /* LINUX_ASPM_H */