diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2008-07-23 04:32:24 +0200 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-07-28 23:56:09 +0200 |
| commit | 5fde244d39b88625ac578d83e6625138714de031 (patch) | |
| tree | e50762b22a94f7f7990c9dbab699a857da0982eb /include | |
| parent | PCI MSI: Don't disable MSIs if the mask bit isn't supported (diff) | |
| download | linux-5fde244d39b88625ac578d83e6625138714de031.tar.xz linux-5fde244d39b88625ac578d83e6625138714de031.zip | |
PCI: disable ASPM per ACPI FADT setting
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/acpi/actbl.h | 1 | ||||
| -rw-r--r-- | include/linux/pci-aspm.h | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h index 1ebbe883f786..13a3d9ad92db 100644 --- a/include/acpi/actbl.h +++ b/include/acpi/actbl.h @@ -277,6 +277,7 @@ enum acpi_prefered_pm_profiles { #define BAF_LEGACY_DEVICES 0x0001 #define BAF_8042_KEYBOARD_CONTROLLER 0x0002 #define BAF_MSI_NOT_SUPPORTED 0x0008 +#define BAF_PCIE_ASPM_CONTROL 0x0010 #define FADT2_REVISION_ID 3 #define FADT2_MINUS_REVISION_ID 2 diff --git a/include/linux/pci-aspm.h b/include/linux/pci-aspm.h index a1a1e618e996..91ba0b338b47 100644 --- a/include/linux/pci-aspm.h +++ b/include/linux/pci-aspm.h @@ -27,6 +27,7 @@ extern void pcie_aspm_init_link_state(struct pci_dev *pdev); extern void pcie_aspm_exit_link_state(struct pci_dev *pdev); extern void pcie_aspm_pm_state_change(struct pci_dev *pdev); extern void pci_disable_link_state(struct pci_dev *pdev, int state); +extern void pcie_no_aspm(void); #else static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { @@ -40,6 +41,10 @@ static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) static inline void pci_disable_link_state(struct pci_dev *pdev, int state) { } + +static inline void pcie_no_aspm(void) +{ +} #endif #ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */ |