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| author | David Ertman <davidx.m.ertman@intel.com> | 2014-02-22 03:15:17 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-03-07 22:52:07 -0800 |
| commit | 74f350ee08e2ffa083204029018fce9941ba9bd5 (patch) | |
| tree | d162e3f02341b9f8d83a9d30b328a766b35551c5 /drivers/net/ethernet/intel/e1000e/defines.h | |
| parent | 63eb48f151b5f1d8dba35d6176d0d7c9643b33af (diff) | |
| download | linux-74f350ee08e2ffa083204029018fce9941ba9bd5.tar.gz linux-74f350ee08e2ffa083204029018fce9941ba9bd5.tar.bz2 linux-74f350ee08e2ffa083204029018fce9941ba9bd5.zip | |
e1000e: Feature Enable PHY Ultra Low Power Mode (ULP)
ULP is a power saving feature that reduces the power consumption of the
PHY when a cable is not connected.
ULP is gated on the following conditions:
1) The hardware must support ULP. Currently this is only I218
devices from Intel
2) ULP is initiated by the driver, so, no driver results in no ULP.
3) ULP's implementation utilizes Runtime Power Management to toggle its
execution. ULP is enabled/disabled based on the state of Runtime PM.
4) ULP is not active when wake-on-unicast, multicast or broadcast is active
as these features are mutually-exclusive.
Since the PHY is in an unavailable state while ULP is active, any access
of the PHY registers will fail. This is resolved by utilizing kernel
calls that cause the device to exit Runtime PM (e.g. pm_runtime_get_sync)
and then, after PHY access is complete, allow the device to resume
Runtime PM (e.g. pm_runtime_put_sync).
Under certain conditions, toggling the LANPHYPC is necessary to disable
ULP mode. Break out existing code to toggle LANPHYPC to a new function
to avoid code duplication.
Signed-off-by: Dave Ertman <davidx.m.ertman@intel.com>
Cc: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/defines.h')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/defines.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h index 1b7c26857881..d18e89212575 100644 --- a/drivers/net/ethernet/intel/e1000e/defines.h +++ b/drivers/net/ethernet/intel/e1000e/defines.h @@ -28,9 +28,11 @@ /* Definitions for power management and wakeup registers */ /* Wake Up Control */ -#define E1000_WUC_APME 0x00000001 /* APM Enable */ -#define E1000_WUC_PME_EN 0x00000002 /* PME Enable */ -#define E1000_WUC_PHY_WAKE 0x00000100 /* if PHY supports wakeup */ +#define E1000_WUC_APME 0x00000001 /* APM Enable */ +#define E1000_WUC_PME_EN 0x00000002 /* PME Enable */ +#define E1000_WUC_PME_STATUS 0x00000004 /* PME Status */ +#define E1000_WUC_APMPME 0x00000008 /* Assert PME on APM Wakeup */ +#define E1000_WUC_PHY_WAKE 0x00000100 /* if PHY supports wakeup */ /* Wake Up Filter Control */ #define E1000_WUFC_LNKC 0x00000001 /* Link Status Change Wakeup Enable */ |