Re: [PATCH 5/7] Documentation: DT: net: cpsw: allow to specify descriptors pool size

Ivan Khoronzhuk
2016-12-02T11:28:45Z

On Thu, Dec 01, 2016 at 05:34:30PM -0600, Grygorii Strashko wrote:
> Add optional property "descs_pool_size" to specify buffer descriptor's
> pool size. The "descs_pool_size" should define total number of CPDMA
> CPPI descriptors to be used for both ingress/egress packets
> processing. If not specified - the default value 256 will be used
> which will allow to place descriptor's pool into the internal CPPI
> RAM on most of TI SoC.
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> ---
> Documentation/devicetree/bindings/net/cpsw.txt | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
> index 5ad439f..b99d196 100644
> --- a/Documentation/devicetree/bindings/net/cpsw.txt
> +++ b/Documentation/devicetree/bindings/net/cpsw.txt
> @@ -35,6 +35,11 @@ Optional properties:
> For example in dra72x-evm, pcf gpio has to be
> driven low so that cpsw slave 0 and phy data
> lines are connected via mux.
> +- descs_pool_size : total number of CPDMA CPPI descriptors to be used for
> + both ingress/egress packets processing. if not
> + specified the default value 256 will be used which
> + will allow to place descriptors pool into the
> + internal CPPI RAM.
Does it describe h/w? Why now module parameter? or even smth like ethtool num
ring entries?

>
> Slave Properties:
> --
> 2.10.1
>