linux-kernel - Re: [PATCH 0/2] dmaengine: Add DW AXI DMAC driver

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Message-ID: <1485362475.2133.329.camel@linux.intel.com>
Date:   Wed, 25 Jan 2017 18:41:15 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        dmaengine@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-snps-arc@...ts.infradead.org,
        Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>
Subject: Re: [PATCH 0/2] dmaengine: Add DW AXI DMAC driver

On Wed, 2017-01-25 at 18:34 +0300, Eugeniy Paltsev wrote:
> This patch series add support for the DW AXI DMAC controller.
> 
> DW AXI DMAC is a part of upcoming development board from Synopsys.
> 
> In this driver implementation only DMA_MEMCPY and DMA_SG transfers
> are supported.
> 
> Changes for v0:
>  * Switch to virt-dma API (according to previous RFC)
>  * Small fixies according to previous RFC

Yeah, seems you didn't address some of the comments and didn't comment
why...

>  * Add DT bindings
> 
> Eugeniy Paltsev (2):
>   dt-bindings: Document the Synopsys DW AXI DMA bindings
>   dmaengine: Add DW AXI DMAC driver
> 
>  .../devicetree/bindings/dma/snps,axi-dw-dmac.txt   |   33 +
>  drivers/dma/Kconfig                                |    8 +
>  drivers/dma/Makefile                               |    1 +

>  drivers/dma/axi_dma_platform.c                     | 1060
> ++++++++++++++++++++

This surprises me. I would expect more then 100+ LOC reduction when
switched to virt-dma API. Can you double check that you are using it
effectively?

>  drivers/dma/axi_dma_platform.h                     |  124 +++
>  drivers/dma/axi_dma_platform_reg.h                 |  189 ++++
>  6 files changed, 1415 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/snps,axi-dw-
> dmac.txt
>  create mode 100644 drivers/dma/axi_dma_platform.c
>  create mode 100644 drivers/dma/axi_dma_platform.h
>  create mode 100644 drivers/dma/axi_dma_platform_reg.h
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy