Re: usb and no bus_dma(9)

[KIYOHARA Takashi <kiyohara%kk.iij4u.or.jp@localhost>]

Hi! Martin,


From: Martin Husemann <martin%duskware.de@localhost>
Date: Sun, 13 Mar 2011 10:21:06 +0100

> On Sun, Mar 13, 2011 at 04:11:06PM +0900, KIYOHARA Takashi wrote:
> > Our usb driver demands bus_dma(9) without fail.  However, slhci(4)
> > doesn't use DMA.  Moreover, some ports is not supporting bus_dma(9)
> > now.
> 
> Isn't it easy to provide a bus_dma implementation that does not realy
> do dma?
> 
> That would be far preferable to crippling lots of other code with MD hacks,
> IMHO.

I think that it is strange to implement bus_dma(9) for port that doesn't
use DMA.

Thanks,
--
kiyohara