scsi: docs: Add description for missing options of link_power_management_policy

With the kernel update we have more different policy for SCSI
link power management. Add the corresponding description to
the file.

Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260115065341.10230-1-s921975628@gmail.com>

diff --git a/Documentation/scsi/link_power_management_policy.rst b/Documentation/scsi/link_power_management_policy.rst
index 64288dcf10f687a6d2caa2f974f19224cb0848e3..e350892cc2f3bed4e3f8c198b7bde58b3371df35 100644 (file)
--- a/Documentation/scsi/link_power_management_policy.rst
+++ b/Documentation/scsi/link_power_management_policy.rst
@@ -5,13 +5,13 @@ Link Power Managent Policy
 ==========================
 
 This parameter allows the user to set the link (interface) power management.
-There are 3 possible options:
+There are 6 possible options:
 
-=====================   =====================================================
+======================  =====================================================
 Value                  Effect
-=====================   =====================================================
-min_power              Tell the controller to try to make the link use the
-                       least possible power when possible.  This may
+======================  =====================================================
+min_power              Enable slumber mode(no partial mode) for the link to
+                       use the least possible power when possible.  This may
                        sacrifice some performance due to increased latency
                        when coming out of lower power states.
 
@@ -22,4 +22,15 @@ max_performance              Generally, this means no power management.  Tell
 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.
-=====================   =====================================================
+
+keep_firmware_settings Do not change the current firmware settings for
+                       Power management. This is the default setting.
+
+med_power_with_dipm    Same as medium_power, but additionally with
+                       Device-initiated power management(DIPM) enabled,
+                       as Intel Rapid Storage Technology(IRST) does.
+
+min_power_with_partial Same as min_power, but additionally with partial
+                       power state enabled, which may improve performance
+                       over min_power setting.
+======================  =====================================================