| To: | Martin Michlmayr <tbm@cyrius.com> |
|---|---|
| Subject: | Re: BCM91x80A/B PCI DMA problems |
| From: | Alan Cox <alan@lxorguk.ukuu.org.uk> |
| Date: | Tue, 14 Mar 2006 12:14:12 +0000 |
| Cc: | Mark E Mason <mark.e.mason@broadcom.com>, linux-mips@linux-mips.org |
| In-reply-to: | <20060314033439.GP29285@deprecation.cyrius.com> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <7E000E7F06B05C49BDBB769ADAF44D07868120@NT-SJCA-0750.brcm.ad.broadcom.com> <20060314033439.GP29285@deprecation.cyrius.com> |
| Sender: | linux-mips-bounce@linux-mips.org |
On Maw, 2006-03-14 at 03:34 +0000, Martin Michlmayr wrote: > Does this information help? Also, we were wondering how to find out > whether a driver is okay with 64-bit dma addresses. 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. Alan |
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