linux-kernel - Re: [PATCH v11 2/2] dmaengine: Add Xilinx zynqmp dma engine driver support

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Message-ID: <20160630042653.GM14945@localhost>
Date:	Thu, 30 Jun 2016 09:56:53 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Kedareswara rao Appana <appana.durga.rao@...inx.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	michal.simek@...inx.com, soren.brinkmann@...inx.com,
	dan.j.williams@...el.com, appanad@...inx.com,
	moritz.fischer@...us.com, laurent.pinchart@...asonboard.com,
	luis@...ethencourt.com, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org,
	Punnaiah Choudary Kalluri <punnaia@...inx.com>
Subject: Re: [PATCH v11 2/2] dmaengine: Add Xilinx zynqmp dma engine driver
 support

On Thu, Jun 09, 2016 at 09:07:47PM +0530, Kedareswara rao Appana wrote:

> +	dma_set_mask(&pdev->dev, DMA_BIT_MASK(44));
> +	dma_cap_set(DMA_SG, zdev->common.cap_mask);
> +	dma_cap_set(DMA_MEMCPY, zdev->common.cap_mask);
 
>  /**
> + * struct zynqmp_dma_config - ZYNQMP DMA Configuration structure
> + * @ovrfetch: Overfetch status
> + * @has_sg: Support scatter gather transfers
> + * @ratectrl: Rate control value
> + * @src_issue: Out standing transactions on source
> + * @src_burst_len: Source burst length
> + * @dst_burst_len: Dest burst length
> + */

As discussed in other thread as well, this is no-go for memcpy. Please come
back after removing this

For slave usages use the dma_slave_config

-- 
~Vinod