summaryrefslogtreecommitdiffstats
path: root/Documentation/scsi/link_power_management_policy.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/scsi/link_power_management_policy.rst')
-rw-r--r--Documentation/scsi/link_power_management_policy.rst25
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/scsi/link_power_management_policy.rst b/Documentation/scsi/link_power_management_policy.rst
new file mode 100644
index 000000000..64288dcf1
--- /dev/null
+++ b/Documentation/scsi/link_power_management_policy.rst
@@ -0,0 +1,25 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+==========================
+Link Power Managent Policy
+==========================
+
+This parameter allows the user to set the link (interface) power management.
+There are 3 possible options:
+
+===================== =====================================================
+Value Effect
+===================== =====================================================
+min_power Tell the controller to try to make the link use the
+ least possible power when possible. This may
+ sacrifice some performance due to increased latency
+ when coming out of lower power states.
+
+max_performance Generally, this means no power management. Tell
+ the controller to have performance be a priority
+ over power management.
+
+medium_power Tell the controller to enter a lower power state
+ when possible, but do not enter the lowest power
+ state, thus improving latency over min_power setting.
+===================== =====================================================