2005-04-16 16:20:36 -06:00
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#
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# PCI Express Port Bus Configuration
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#
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config PCIEPORTBUS
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2013-07-04 14:45:20 -06:00
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bool "PCI Express Port Bus support"
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2005-04-16 16:20:36 -06:00
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depends on PCI
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help
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This automatically enables PCI Express Port Bus support. Users can
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choose Native Hot-Plug support, Advanced Error Reporting support,
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Power Management Event support and Virtual Channel support to run
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on PCI Express Ports (Root or Switch).
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#
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# Include service Kconfig here
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#
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config HOTPLUG_PCI_PCIE
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2013-07-23 10:55:56 -06:00
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bool "PCI Express Hotplug driver"
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2005-04-16 16:20:36 -06:00
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depends on HOTPLUG_PCI && PCIEPORTBUS
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help
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Say Y here if you have a motherboard that supports PCI Express Native
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Hotplug
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When in doubt, say N.
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2006-07-31 01:21:33 -06:00
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source "drivers/pci/pcie/aer/Kconfig"
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PCI: add PCI Express ASPM support
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.
This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.
In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.
Note: some devices might not work well with aspm, either because chipset
issue or device issue. The patch provide API (pci_disable_link_state),
driver can disable ASPM for specific device.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-24 18:46:41 -07:00
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#
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# PCI Express ASPM
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#
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config PCIEASPM
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2011-01-20 15:44:16 -07:00
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bool "PCI Express ASPM control" if EXPERT
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2010-06-22 15:03:03 -06:00
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depends on PCI && PCIEPORTBUS
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default y
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PCI: add PCI Express ASPM support
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.
This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.
In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.
Note: some devices might not work well with aspm, either because chipset
issue or device issue. The patch provide API (pci_disable_link_state),
driver can disable ASPM for specific device.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-24 18:46:41 -07:00
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help
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2010-06-22 15:03:03 -06:00
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This enables OS control over PCI Express ASPM (Active State
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Power Management) and Clock Power Management. ASPM supports
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state L0/L0s/L1.
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PCI: add PCI Express ASPM support
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.
This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.
In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.
Note: some devices might not work well with aspm, either because chipset
issue or device issue. The patch provide API (pci_disable_link_state),
driver can disable ASPM for specific device.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-24 18:46:41 -07:00
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2011-12-06 11:48:35 -07:00
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ASPM is initially set up by the firmware. With this option enabled,
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2010-06-22 15:03:03 -06:00
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Linux can modify this state in order to disable ASPM on known-bad
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hardware or configurations and enable it when known-safe.
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ASPM can be disabled or enabled at runtime via
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/sys/module/pcie_aspm/parameters/policy
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When in doubt, say Y.
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2016-03-15 05:28:32 -06:00
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PCI: add PCI Express ASPM support
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.
This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.
In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.
Note: some devices might not work well with aspm, either because chipset
issue or device issue. The patch provide API (pci_disable_link_state),
driver can disable ASPM for specific device.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-24 18:46:41 -07:00
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config PCIEASPM_DEBUG
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bool "Debug PCI Express ASPM"
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depends on PCIEASPM
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default n
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help
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This enables PCI Express ASPM debug support. It will add per-device
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interface to control ASPM.
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2010-02-17 15:39:08 -07:00
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2012-02-03 08:18:13 -07:00
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choice
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prompt "Default ASPM policy"
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default PCIEASPM_DEFAULT
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depends on PCIEASPM
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config PCIEASPM_DEFAULT
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2016-03-15 05:28:32 -06:00
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bool "BIOS default"
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2012-02-03 08:18:13 -07:00
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depends on PCIEASPM
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help
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Use the BIOS defaults for PCI Express ASPM.
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config PCIEASPM_POWERSAVE
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2016-03-15 05:28:32 -06:00
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bool "Powersave"
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2012-02-03 08:18:13 -07:00
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depends on PCIEASPM
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help
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Enable PCI Express ASPM L0s and L1 where possible, even if the
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BIOS did not.
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2017-01-02 23:34:11 -07:00
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config PCIEASPM_POWER_SUPERSAVE
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bool "Power Supersave"
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depends on PCIEASPM
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help
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Same as PCIEASPM_POWERSAVE, except it also enables L1 substates where
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possible. This would result in higher power savings while staying in L1
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where the components support it.
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2012-02-03 08:18:13 -07:00
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config PCIEASPM_PERFORMANCE
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2016-03-15 05:28:32 -06:00
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bool "Performance"
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2012-02-03 08:18:13 -07:00
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depends on PCIEASPM
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help
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Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.
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endchoice
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2010-02-17 15:39:08 -07:00
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config PCIE_PME
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def_bool y
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2014-11-27 15:16:57 -07:00
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depends on PCIEPORTBUS && PM
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2016-04-28 16:24:48 -06:00
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config PCIE_DPC
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2016-07-06 10:06:01 -06:00
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bool "PCIe Downstream Port Containment support"
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2016-04-28 16:24:48 -06:00
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depends on PCIEPORTBUS
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default n
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help
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This enables PCI Express Downstream Port Containment (DPC)
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driver support. DPC events from Root and Downstream ports
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will be handled by the DPC driver. If your system doesn't
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have this capability or you do not want to use this feature,
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it is safe to answer N.
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2016-06-11 13:13:38 -06:00
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config PCIE_PTM
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bool "PCIe Precision Time Measurement support"
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default n
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depends on PCIEPORTBUS
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help
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This enables PCI Express Precision Time Measurement (PTM)
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support.
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This is only useful if you have devices that support PTM, but it
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is safe to enable even if you don't.
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