1.. SPDX-License-Identifier: GPL-2.0 2 3========================== 4Link Power Managent Policy 5========================== 6 7This parameter allows the user to set the link (interface) power management. 8There are 6 possible options: 9 10====================== ===================================================== 11Value Effect 12====================== ===================================================== 13min_power Enable slumber mode(no partial mode) for the link to 14 use the least possible power when possible. This may 15 sacrifice some performance due to increased latency 16 when coming out of lower power states. 17 18max_performance Generally, this means no power management. Tell 19 the controller to have performance be a priority 20 over power management. 21 22medium_power Tell the controller to enter a lower power state 23 when possible, but do not enter the lowest power 24 state, thus improving latency over min_power setting. 25 26keep_firmware_settings Do not change the current firmware settings for 27 Power management. This is the default setting. 28 29med_power_with_dipm Same as medium_power, but additionally with 30 Device-initiated power management(DIPM) enabled, 31 as Intel Rapid Storage Technology(IRST) does. 32 33min_power_with_partial Same as min_power, but additionally with partial 34 power state enabled, which may improve performance 35 over min_power setting. 36====================== ===================================================== 37