Re: de(4) bus_dma diff needs testing.

[David Gwynne]

On 15/06/2009, at 1:39 AM, Christian Weisgerber wrote:
Theo de Raadt <dera...@cvs.openbsd.org> wrote:

ahci0: error 35 loading dmamap
de0: unable to load tx map, error = 35

bigmem is unworkable.
Your DMA descriptor rings are in high memory.
They should be in low memory.

I thought iommu takes care of that?

what iommu?

also, why should you have to fix these mappings in bus_dma if you  
simply allocate memory up front in the right place for the devices?

dlg