linux-kernel - How to check if DMA uses bounce buffer

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Message-ID: <87pqr9cgck.fsf@inspiron.ap.columbia.edu>
Date:	Thu, 03 Feb 2011 10:01:15 -0500
From:	Nikolaus Rath <Nikolaus@...h.org>
To:	linux-kernel@...r.kernel.org
Subject: How to check if DMA uses bounce buffer

Hello,

Is there a way to check if a dma mapping set up with dma_map_single will
write directly into the provided buffer, or if the transfer will go
through a bounce buffer?


Thanks,

   -Nikolaus

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