[dpdk-dev] [PATCH] doc: fix mlx5 dependencies

[Adrien Mazarguil <adrien.mazarguil@6wind.com>]

The new dependency of mlx5 to libmnl must be reflected in documentation.

Fixes: 4d5cce06231a ("net/mlx5: lay groundwork for switch offloads")

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
 doc/guides/nics/mlx5.rst | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index ebf233649..4d692fa81 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -448,6 +448,12 @@ DPDK and must be installed separately:
   This library basically implements send/receive calls to the hardware
   queues.
 
+- **libmnl**
+
+  Minimalistic Netlink library mainly relied on to manage E-Switch flow
+  rules (i.e. those with the "transfer" attribute and typically involving
+  port representors).
+
 - **Kernel modules**
 
   They provide the kernel-side Verbs API and low level device drivers that
@@ -526,6 +532,19 @@ required from that distribution.
    this DPDK release was developed and tested against is strongly
    recommended. Please check the `prerequisites`_.
 
+Libmnl
+^^^^^^
+
+Minimal version for libmnl is **1.0.3**.
+
+As a dependency of the **iproute2** suite, this library is often installed
+by default. It is otherwise readily available through standard system
+packages.
+
+Its development headers must be installed in order to compile this PMD.
+These packages are usually named **libmnl-dev** or **libmnl-devel**
+depending on the Linux distribution.
+
 Supported NICs
 --------------
 
-- 
2.11.0