linux-kernel - Coherent DMA mapping for existing struct page

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Message-ID: <87ipxevyiq.fsf@inspiron.ap.columbia.edu>
Date:	Mon, 24 Jan 2011 15:26:37 -0500
From:	Nikolaus Rath <Nikolaus@...h.org>
To:	linux-kernel@...r.kernel.org
Subject: Coherent DMA mapping for existing struct page

Hello,

How do I set up a coherent DMA mapping for an existing struct page?
dma_alloc_coherent() wants to allocate its own buffer, and
dma_map_page() sets up streaming mappings. Which function am I missing?


Thanks,

   -Nikolaus

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