Re: [PATCH net-next v3 1/2] net: mscc: ocelot: Add support for tcam

Vladimir Oltean
2020-02-24T10:38:30Z

Hi Horatiu,

On Fri, 31 May 2019 at 10:18, Horatiu Vultur
<horatiu.vultur@microchip.com> wrote:
>
> Add ACL support using the TCAM. Using ACL it is possible to create rules
> in hardware to filter/redirect frames.
>
> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> ---
> arch/mips/boot/dts/mscc/ocelot.dtsi | 5 +-
> drivers/net/ethernet/mscc/Makefile | 2 +-
> drivers/net/ethernet/mscc/ocelot.c | 13 +
> drivers/net/ethernet/mscc/ocelot.h | 8 +
> drivers/net/ethernet/mscc/ocelot_ace.c | 777 +++++++++++++++++++++++++++++++
> drivers/net/ethernet/mscc/ocelot_ace.h | 227 +++++++++
> drivers/net/ethernet/mscc/ocelot_board.c | 1 +
> drivers/net/ethernet/mscc/ocelot_regs.c | 11 +
> drivers/net/ethernet/mscc/ocelot_s2.h | 64 +++
> drivers/net/ethernet/mscc/ocelot_vcap.h | 403 ++++++++++++++++
> 10 files changed, 1508 insertions(+), 3 deletions(-)
> create mode 100644 drivers/net/ethernet/mscc/ocelot_ace.c
> create mode 100644 drivers/net/ethernet/mscc/ocelot_ace.h
> create mode 100644 drivers/net/ethernet/mscc/ocelot_s2.h
> create mode 100644 drivers/net/ethernet/mscc/ocelot_vcap.h
>

I was testing this functionality and it looks like the MAC_ETYPE keys
(src_mac, dst_mac) only match non-IP frames.
Example, this rule doesn't drop ping traffic:

tc qdisc add dev swp0 clsact
tc filter add dev swp0 ingress flower skip_sw dst_mac
96:e1:ef:64:1b:44 action drop

Would it be possible to do anything about that?

Thanks,
-Vladimir