linux-kernel - Re: [Linux-fbdev-devel] How to mmap a shadow framebuffer in virtual memory

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Message-ID: <45AB196B.7090409@develer.com>
Date:	Mon, 15 Jan 2007 07:04:27 +0100
From:	Bernardo Innocenti <bernie@...eler.com>
To:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
CC:	Linux Frame Buffer Device Development 
	<linux-fbdev-devel@...ts.sourceforge.net>,
	lkml <linux-kernel@...r.kernel.org>, aleph <aleph@...eler.com>
Subject: Re: [Linux-fbdev-devel] How to mmap a shadow framebuffer in virtual
 memory

Geert Uytterhoeven wrote:

> It's known to work for the PS3 frame buffer device driver, which copies the
> virtual frame buffer to the GPU on every vsync. Check out ps3fb_mmap() in
> http://www.kernel.org/git/?p=linux/kernel/git/geoff/ps3-linux.git;a=blob_plain;f=drivers/video/ps3fb.c;hb=HEAD

I still couldn't solve my problem, but thanks for helping.

The way you map memory in ps3fb_mmap() is basically the same.
In my case, memory is allocated with __get_free_pages() instead
of being at an absolute physical address, but I can't see how
it could make any difference.

-- 
   // Bernardo Innocenti - Develer S.r.l., R&D dept.
 \X/  http://www.develer.com/
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