i have a similar problem with BCM4401 ethernet -- it can only address
1GB of physical ram and i need to introduce bounce buffers into the
driver itself, as i've as yet been unable to figure out how to make
bus_dma(9) do this for me.

is there a way for bus_dma(9) to properly handle this sort of device?
some audio chipsets have the same issue, so, a more general solution
than bounce buffers in the driver would seem best.


.mrg.