summaryrefslogtreecommitdiffstats
path: root/Documentation/networking/devlink/sja1105.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/networking/devlink/sja1105.rst')
-rw-r--r--Documentation/networking/devlink/sja1105.rst49
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/sja1105.rst b/Documentation/networking/devlink/sja1105.rst
new file mode 100644
index 000000000..e2679c274
--- /dev/null
+++ b/Documentation/networking/devlink/sja1105.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+sja1105 devlink support
+=======================
+
+This document describes the devlink features implemented
+by the ``sja1105`` device driver.
+
+Parameters
+==========
+
+.. list-table:: Driver-specific parameters implemented
+ :widths: 5 5 5 85
+
+ * - Name
+ - Type
+ - Mode
+ - Description
+ * - ``best_effort_vlan_filtering``
+ - Boolean
+ - runtime
+ - Allow plain ETH_P_8021Q headers to be used as DSA tags.
+
+ Benefits:
+
+ - Can terminate untagged traffic over switch net
+ devices even when enslaved to a bridge with
+ vlan_filtering=1.
+ - Can terminate VLAN-tagged traffic over switch net
+ devices even when enslaved to a bridge with
+ vlan_filtering=1, with some constraints (no more than
+ 7 non-pvid VLANs per user port).
+ - Can do QoS based on VLAN PCP and VLAN membership
+ admission control for autonomously forwarded frames
+ (regardless of whether they can be terminated on the
+ CPU or not).
+
+ Drawbacks:
+
+ - User cannot use VLANs in range 1024-3071. If the
+ switch receives frames with such VIDs, it will
+ misinterpret them as DSA tags.
+ - Switch uses Shared VLAN Learning (FDB lookup uses
+ only DMAC as key).
+ - When VLANs span cross-chip topologies, the total
+ number of permitted VLANs may be less than 7 per
+ port, due to a maximum number of 32 VLAN retagging
+ rules per switch.