linux-kernel - Re: [PATCH 1/2] dma: Add interface to calculate data transferred

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Date:	Wed, 16 Oct 2013 09:13:20 +0000
From:	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>
To:	"Koul, Vinod" <vinod.koul@...el.com>
CC:	"Williams, Dan J" <dan.j.williams@...el.com>,
	Youquan Song <youquan.song@...ux.jf.intel.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	"Song, Youquan" <youquan.song@...el.com>,
	"Westerberg, Mika" <mika.westerberg@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dma: Add interface to calculate data transferred

On Wed, 2013-10-16 at 13:27 +0530, Vinod Koul wrote:
> On Wed, Oct 16, 2013 at 02:06:30PM +0530, Shevchenko, Andriy wrote:
> > On Wed, 2013-10-16 at 11:08 +0530, Vinod Koul wrote:

[]

> > > Well am going to take it a bit further and ask you why do we need the
> > > /sys/class/dma? I have never used it for slave work.
> > 
> > How user (who, f.e., would like to run dmatest) will know names of the
> > channels provided?
> Ok dmatest requires this, I overlooked that part
> 
> > How could we see what channels of certain dma controller are requested /
> > busy from userspace?
> But do end user care or need to know about this?

The idea is to have some test cases. So, end user probably doesn't
really need this.

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