From: Scott Wood <scottwood@freescale.com>
To: Bruce_Leonard@selinc.com
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Async DMA question regarding dma_async_memcpy_buf_to_buf
Date: Mon, 24 Nov 2008 15:28:20 -0600 [thread overview]
Message-ID: <492B1C74.9070700@freescale.com> (raw)
In-Reply-To: <OF5164841E.9891D22C-ON8825750B.0074160D-8825750B.007587B6@selinc.com>
Bruce_Leonard@selinc.com wrote:
> Maybe (with you clarification) this is starting to make sense. It doesn't
> matter if the "src" is host memory or PCI space. What the "src" and it's
> DMA_TO_DEVICE mapping is saying to the kernel is "this data needs to be
> moved into the DMA engine", while the "dest" and it's DMA_FROM_DEIVCE
> mapping is telling the kernel "this data needs to be moved from the DMA
> engine".
Right.
-Scott
next prev parent reply other threads:[~2008-11-24 21:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-24 18:55 Async DMA question regarding dma_async_memcpy_buf_to_buf Bruce_Leonard
2008-11-24 19:47 ` Scott Wood
2008-11-24 20:10 ` Bruce_Leonard
2008-11-24 20:16 ` Scott Wood
2008-11-24 20:49 ` Bruce_Leonard
2008-11-24 21:00 ` Scott Wood
2008-11-24 21:23 ` Bruce_Leonard
2008-11-24 21:28 ` Scott Wood [this message]
2008-11-24 21:35 ` Bruce_Leonard
-- strict thread matches above, loose matches on Subject: below --
2008-11-22 1:00 Bruce_Leonard
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