5fde244d39
The ACPI FADT table includes an ASPM control bit. If the bit is set, do not enable ASPM since it may indicate that the platform doesn't actually support the feature. Tested-by: Jack Howarth <howarth@bromo.msbb.uc.edu> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* aspm.h
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*
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* PCI Express ASPM defines and function prototypes
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*
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* Copyright (C) 2007 Intel Corp.
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* Zhang Yanmin (yanmin.zhang@intel.com)
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* Shaohua Li (shaohua.li@intel.com)
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*
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* For more information, please consult the following manuals (look at
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* http://www.pcisig.com/ for how to get them):
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*
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* PCI Express Specification
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*/
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#ifndef LINUX_ASPM_H
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#define LINUX_ASPM_H
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#include <linux/pci.h>
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#define PCIE_LINK_STATE_L0S 1
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#define PCIE_LINK_STATE_L1 2
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#define PCIE_LINK_STATE_CLKPM 4
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#ifdef CONFIG_PCIEASPM
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extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
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extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
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extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
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extern void pci_disable_link_state(struct pci_dev *pdev, int state);
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extern void pcie_no_aspm(void);
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#else
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static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
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{
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}
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static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
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{
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}
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static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
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{
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}
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static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
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{
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}
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static inline void pcie_no_aspm(void)
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{
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}
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#endif
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#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
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extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
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extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
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#else
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static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
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{
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}
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static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
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{
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}
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#endif
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#endif /* LINUX_ASPM_H */
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