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_clear_aspm(struct pci_bus *bus); 33void pcie_no_aspm(void); 34#else 35static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) 36{ 37} 38static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) 39{ 40} 41static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) 42{ 43} 44static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) 45{ 46} 47static inline void pci_disable_link_state(struct pci_dev *pdev, int state) 48{ 49} 50static inline void pcie_clear_aspm(struct pci_bus *bus) 51{ 52} 53static inline void pcie_no_aspm(void) 54{ 55} 56#endif 57 58#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */ 59void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev); 60void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev); 61#else 62static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev) 63{ 64} 65static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) 66{ 67} 68#endif 69#endif /* LINUX_ASPM_H */ 70