From: Bill Gatliff <bgat@billgatliff.com>
To: Timur Tabi <timur@freescale.com>
Cc: timur.tabi@gmail.com, Bruce_Leonard@selinc.com,
linuxppc-embedded@ozlabs.org
Subject: Re: Using DMA
Date: Sat, 08 Nov 2008 21:26:52 -0600 [thread overview]
Message-ID: <4916587C.3010108@billgatliff.com> (raw)
In-Reply-To: <4914C0FB.60101@freescale.com>
Timur Tabi wrote:
> Bruce_Leonard@selinc.com wrote:
>
>> So it sounds like the async dma is the way to go, since I want to off load
>> as much as possible from the core. As you say, though, it's new and not
>> in LDD3. Is .../drivers/dma/dmaengine.c what everyone is refering to as
>> async dma?
>
> Yes.
>
>> If not, what is? And what in the kernel is already using it
>> so I can look at some example code.
>
> There's some network stuff that uses it for optimization. If CONFIG_NET_DMA is
> enabled, that will turn on some kind of TCP/IP offloading. I don't really know
> much about that. There's also a dmatest.c testing driver.
I think some md (RAID) stuff uses it, too.
> It would definitely be nice to see a third client driver.
Why stop at three? :)
b.g.
--
Bill Gatliff
bgat@billgatliff.com
next prev parent reply other threads:[~2008-11-09 3:26 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-06 2:07 Using DMA Bruce_Leonard
2008-11-06 18:29 ` Scott Wood
2008-11-06 18:36 ` Bill Gatliff
2008-11-06 20:58 ` Bruce_Leonard
2008-11-06 21:42 ` Bill Gatliff
2008-11-07 15:43 ` Timur Tabi
2008-11-07 21:31 ` Bruce_Leonard
2008-11-07 21:46 ` Timur Tabi
2008-11-07 22:12 ` Bruce_Leonard
2008-11-07 22:28 ` Timur Tabi
2008-11-07 22:37 ` Bruce_Leonard
2008-11-09 3:26 ` Bill Gatliff [this message]
2008-11-09 3:25 ` Bill Gatliff
2008-11-10 0:09 ` Bruce_Leonard
2008-11-10 14:35 ` Timur Tabi
2008-11-10 17:58 ` Bruce_Leonard
2008-11-11 9:09 ` Rajasekaran Kaliyaperumal, Chennai
2008-11-11 10:22 ` Porting Linux to 8051 [ was:Re: Using DMA ] Martyn Welch
2008-11-10 22:06 ` Using DMA Bruce_Leonard
2008-11-11 14:51 ` Timur Tabi
2008-11-11 18:19 ` Bruce_Leonard
2008-11-11 19:22 ` Timur Tabi
2008-11-11 21:46 ` Bruce_Leonard
2008-11-11 21:54 ` Timur Tabi
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