Re: [PATCH 10/13] ARM: mvebu: add buffer manager nodes to armada-38x.dtsi

From	Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 10/13] ARM: mvebu: add buffer manager nodes to armada-38x.dtsi
Date	2015-11-22 10:50 +0100
Message-ID	<qxzrr-1SN-1@gated-at.bofh.it> (permalink)
References	<qxxJ0-HM-3@gated-at.bofh.it> <qxxJ0-HM-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hello.

On 11/22/2015 10:53 AM, Marcin Wojtas wrote:

> Armada 38x network controller supports hardware buffer management (BM).
> Since it is now enabled in mvneta driver, appropriate nodes can be added
> to armada-38x.dtsi - for the actual common BM unit (bm@c8000) and its
> internal SRAM (bm-bppi), which is used for indirect access to buffer
> pointer ring residing in DRAM.
>
> Pools - ports mapping, bm-bppi entry in 'soc' node's ranges and optional
> parameters are supposed to be set in board files.
>
> Signed-off-by: Marcin Wojtas <mw@semihalf.com>
> ---
>   arch/arm/boot/dts/armada-38x.dtsi | 18 ++++++++++++++++++
>   1 file changed, 18 insertions(+)
>
> diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
> index b7868b2..b9f4ce2 100644
> --- a/arch/arm/boot/dts/armada-38x.dtsi
> +++ b/arch/arm/boot/dts/armada-38x.dtsi
> @@ -539,6 +539,14 @@
>   				status = "disabled";
>   			};
>
> +			bm: bm@c8000 {

    The ePAPR standard tells us to give generic names to the device nodes, 
hence this should be named "buffer-manager" (?).

[...]
> @@ -617,6 +625,16 @@
>   			#size-cells = <1>;
>   			ranges = <0 MBUS_ID(0x09, 0x15) 0 0x800>;
>   		};
> +
> +		bm_bppi: bm-bppi {

    And this one "memory" (?).

[...]

MBR, Sergei

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[PATCH 10/13] ARM: mvebu: add buffer manager nodes to armada-38x.dtsi Marcin Wojtas <mw@semihalf.com> - 2015-11-22 09:00 +0100
  Re: [PATCH 10/13] ARM: mvebu: add buffer manager nodes to  armada-38x.dtsi Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2015-11-22 10:50 +0100

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