[dpdk-dev] [PATCH 4/4] doc: add switch restart support to fm10k guide

[Xiao Wang]

This patch documents how DPDK app should handle the event of switch
quit-restart to resume its network without an app-level restart.

Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
---
 doc/guides/nics/fm10k.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/guides/nics/fm10k.rst b/doc/guides/nics/fm10k.rst
index 7fc4862..51b8326 100644
--- a/doc/guides/nics/fm10k.rst
+++ b/doc/guides/nics/fm10k.rst
@@ -161,6 +161,16 @@ FM10000 PMD driver. The switch driver can be acquired from Intel support.
 Only Testpoint is validated with DPDK, the latest version that has been
 validated with DPDK is 4.1.6.
 
+Support Switch Restart
+~~~~~~~~~~~~~~~~~~~~~~
+
+For fm10k multi host based design, DPDK app running in VM or host needs to
+get aware of the switch's state because switch may undergo a quit-restart.
+When switch goes down, DPDK app receives a LSC event indicating link status
+turns down, and app should stop the worker threads that are polling on the
+Rx/Tx queues. When switch gets up, a LSC event indicating LINK_UP is sent to
+the app, then app can restart fm10k port to resume its network processing.
+
 CRC striping
 ~~~~~~~~~~~~
 
-- 
1.8.3.1