Re: [PATCH v8 net-next 0/9] Switch support
From: Ratheesh Kannoth <rkannoth@marvell.com>
Date: 2026-08-14 08:54:30
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On 2026-08-11 at 14:23:57, Ratheesh Kannoth (rkannoth@marvell.com) wrote:
Marvell OcteonTX2 switch hardware is capable of accelerating L2, L3, and
flow. When representors are enabled through devlink, a logical port is
created in switch hardware for each representor device.
This patch series implements communication from the host OS to the switch
hardware and vice versa.
control plane (FDB / FIB / flow over mailbox)
+---------------------------------------------------------------------+
| HOST OS |
| |
| +------------+ +---------------------+ +---------------+ |
| | bridge / | | PF + notifiers | | TC / flower | |
| | routing | | (FDB, FIB, flow) | | offload | |
| +------+-----+ +-----------+---------+ +-------+-------+ |
| ^ | | |
| | slow path | | |
| | (unmatched pkts) v v |
| +------+------+ +------+------+ +------+------+ |
| | rep-eth0 | | PF / VF | <----> | RVU AF | |
| +------+------+ +-------------+ +------+------+ |
| | | |
| +------+------+ | |
| | rep-eth1 | | |
| +-------------+ | |
| | slow path (miss / control to host stack) | |
+---------------------------------------------------------------------+
| | | |
| | mailbox / PCIe | |
| v v |
+---------------------------------------------------------------------+
| SWITCH HARDWARE |
| |
| +---------------------------------------------------+ |
| | L2 tables | L3 tables | flow TCAM (HW) | |
| +-------+-------------+---------------+-------------+ |
| | fast path (HW) | |
| v v |
| lport0 <========================> lport1 |
| HW forwarding between ports |
| |
| slow path (miss): packets raised to host via representors |
+---------------------------------------------------------------------+
When representors are created, corresponding logical ports are created in
switchdev. Matching traffic is accelerated in switch hardware using
installed L2, L3, and flow rules. Packets that do not match offloaded
state, or that require software handling, take the slow path through
representors and the host networking stack. Control updates from the host
(FDB, FIB, TC flower) are sent to the AF over mailbox and programmed into
switch hardware tables.Will address sashiko issues in v9 pw-bot: changes-requested