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RE: BCM91x80A/B PCI DMA problems

To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>, "Martin Michlmayr" <tbm@cyrius.com>
Subject: RE: BCM91x80A/B PCI DMA problems
From: "Mark E Mason" <mark.e.mason@broadcom.com>
Date: Tue, 14 Mar 2006 08:55:31 -0800
Cc: linux-mips@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
Thread-index: AcZHX/ZufVEYAD+0S7OKc9dHk+WzCgAJ9W4w
Thread-topic: BCM91x80A/B PCI DMA problems
Hello Alan,
 
> All drivers set a PCI DMA mask. If the kernel is not bouncing 
> buffers and ensuring the buffers are below the 32bit bus 
> address limit by default then the architecture kernel code 
> needs fixing. The drivers don't deal with this matter beyond 
> setting their PCI DMA range mask.

Thanks!

I'm not that familiar with all parts of the Linux kernel.  What should I
be looking for in order to find the relevant bits in the arch-port code?

Thanks,
Mark


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