Re: [PATCH 1/1] Userspace I/O (UIO): Documentatin for userspace DMA support
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From: Randy Dunlap <hidden>
Date: 2008-12-22 19:14:45
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On Wed, 3 Dec 2008 20:53:27 -0800 Edward Estabrook wrote:
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--- linux-2.6.28-rc6/Documentation/DocBook/uio-howto.tmpl.orig 2008-12-0312:03:43.000000000 -0800+++ linux-2.6.28-rc6/Documentation/DocBook/uio-howto.tmpl 2008-12-0313:11:53.000000000 -0800@@ -572,6 +602,50 @@ to set up sysfs files for this mapping. </para> </sect1> +<sect1 id="dma_region_mmap"> +<title>Allocating DMA region with mmap()</title>
Allocating a DMA region with mmap()
+ <para> + To allocate and map a DMA memory region you use
duplicate "use use". Instead of dropping the second one, make it "the".
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+ use <function>mmap()</function>. You may create as + many regions as system resources allow by repeated use of + <function>mmap()</function>. + </para>
--- ~Randy