netdev - [RFC PATCH net-next 01/12] Documentation: networking: update the graphical representation

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Date:   Sun, 21 Feb 2021 23:33:44 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ido Schimmel <idosch@...sch.org>,
        DENG Qingfang <dqfext@...il.com>,
        Tobias Waldekranz <tobias@...dekranz.com>,
        George McCollister <george.mccollister@...il.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Kurt Kanzenbach <kurt@...utronix.de>
Subject: [RFC PATCH net-next 01/12] Documentation: networking: update the graphical representation

From: Vladimir Oltean <vladimir.oltean@....com>

While preparing some slides for a customer presentation, I found the
existing high-level view to be a bit confusing, so I modified it a
little bit.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 Documentation/networking/dsa/dsa.rst | 45 +++++++++++++++++-----------
 1 file changed, 28 insertions(+), 17 deletions(-)

diff --git a/Documentation/networking/dsa/dsa.rst b/Documentation/networking/dsa/dsa.rst
index e9517af5fe02..e20fbad2241a 100644
--- a/Documentation/networking/dsa/dsa.rst
+++ b/Documentation/networking/dsa/dsa.rst
@@ -172,23 +172,34 @@ Graphical representation
 Summarized, this is basically how DSA looks like from a network device
 perspective::
 
-
-                |---------------------------
-                | CPU network device (eth0)|
-                ----------------------------
-                | <tag added by switch     |
-                |                          |
-                |                          |
-                |        tag added by CPU> |
-        |--------------------------------------------|
-        |            Switch driver                   |
-        |--------------------------------------------|
-                  ||        ||         ||
-              |-------|  |-------|  |-------|
-              | sw0p0 |  | sw0p1 |  | sw0p2 |
-              |-------|  |-------|  |-------|
-
-
+                Unaware application
+              opens and binds socket
+                       |  ^
+                       |  |
+           +-----------v--|--------------------+
+           |+------+ +------+ +------+ +------+|
+           || swp0 | | swp1 | | swp2 | | swp3 ||
+           |+------+-+------+-+------+-+------+|
+           |          DSA switch driver        |
+           +-----------------------------------+
+                         |        ^
+            Tag added by |        | Tag consumed by
+           switch driver |        | switch driver
+                         v        |
+           +-----------------------------------+
+           | Unmodified host interface driver  | Software
+   --------+-----------------------------------+------------
+           |       Host interface (eth0)       | Hardware
+           +-----------------------------------+
+                         |        ^
+         Tag consumed by |        | Tag added by
+         switch hardware |        | switch hardware
+                         v        |
+           +-----------------------------------+
+           |               Switch              |
+           |+------+ +------+ +------+ +------+|
+           || swp0 | | swp1 | | swp2 | | swp3 ||
+           ++------+-+------+-+------+-+------++
 
 Slave MDIO bus
 --------------
-- 
2.25.1