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

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Date:   Fri, 2 Dec 2016 13:28:33 +0200
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Mugunthan V N <mugunthanvnm@...com>,
        Sekhar Nori <nsekhar@...com>, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org
Subject: Re: [PATCH 5/7] Documentation: DT: net: cpsw: allow to specify
 descriptors pool size

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@...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
>