[dpdk-dev] [PATCH v2 5/6] app/testpmd: change hairpin queues setup

[Ori Kam]

Hi Bing

> -----Original Message-----
> From: Bing Zhao <bingz at nvidia.com>
> Sent: Thursday, October 8, 2020 11:52 AM
> Subject: [PATCH v2 5/6] app/testpmd: change hairpin queues setup
> 
> A new parameter `hairpin-mode` is introduced to the testpmd command
> line. Bitmask value is used to provide more flexible configuration.
> This parameter should be used when `hairpinq` is specified in the
> command line.
> 
> Bit 0 in the LSB indicates the hairpin will use the loop mode. The
> previous port RX queue will be connected to the current port TX
> queue.
> Bit 1 in the LSB indicates the hairpin will use pair port mode. The
> even index port will be paired with the next odd index port. If the
> total number of probed port is odd, then the last one will be paired
> to itself.
> If this byte is zero, then each port will be paired to itself.
> Bit 0 takes a higher priority in the checking.
> 
> Bit 4 in the second bytes indicate if the hairpin will use explicit
> TX flow mode.
> 
> e.g. in the command line, "--hairpinq=2 --hairpin-mode=0x11"
> 
> If not set, default value zero will be used and the behavior will
> try to get align with the previous single port mode. If the ports
> belong to different vendors' NICs, it is suggested to use the `self`
> hairpin mode only.
> 
> Since hairpin configures the hardware resources, the port mask of
> packets forwarding engine will not be used here.
> 
> Signed-off-by: Bing Zhao <bingz at nvidia.com>
> ---
> v2: move the hairpin bind/unbind into start/stop to support hot-plug
>     and hot-unplug
> ---

Acked-by: Ori Kam <orika at nvidia.com>
Thanks,
Ori