linux-kernel - Re: dmaengine/Query: What about scatter/gather for mem to mem transfers.

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Message-ID: <4EE06C3C.8080003@st.com>
Date:	Thu, 8 Dec 2011 13:20:20 +0530
From:	Viresh Kumar <viresh.kumar@...com>
To:	Vinod Koul <vinod.koul@...el.com>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Shiraz HASHIM <shiraz.hashim@...com>,
	Armando VISCONTI <armando.visconti@...com>,
	Pratyush ANAND <pratyush.anand@...com>,
	Deepak SIKRI <deepak.sikri@...com>,
	Vipin KUMAR <vipin.kumar@...com>,
	Vipul Kumar SAMAR <vipulkumar.samar@...com>,
	Vincenzo FRASCINO <Vincenzo.FRASCINO@...com>,
	Mirko GARDI <mirko.gardi@...com>,
	Rajeev KUMAR <rajeev-dlh.kumar@...com>,
	Amit VIRDI <Amit.VIRDI@...com>,
	Bhupesh SHARMA <bhupesh.sharma@...com>
Subject: Re: dmaengine/Query: What about scatter/gather for mem to mem transfers.

On 12/8/2011 1:07 PM, Vinod Koul wrote:
> You mean something like:
>        struct dma_async_tx_descriptor *(*device_prep_dma_sg)(
>                 struct dma_chan *chan,
>                 struct scatterlist *dst_sg, unsigned int dst_nents,
>                 struct scatterlist *src_sg, unsigned int src_nents,
>                 unsigned long flags);
> 
> Its already there, you need to implement in your driver :)

Ok. I didn't knew it. :(

-- 
viresh
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