cvs commit: src/sys/dev/usb usbdi.c

[Daan Vreeken [PA4DAN]]

Hi Ian,

On Wednesday 29 November 2006 11:58, you wrote:
> In message <200611281453.26820.Danovitsch at vitsch.net>, "Daan Vreeken
> [PA4DAN]"
>
> writes:
> >I don't believe my patch is at the right place where it's placed now. Any
> >ideas from someone with more bus_dma-foo and/or usb-foo are highly
> >appreciated :)
> >If more debugging information is needed, just ask.
>
> Hi Daan,
>
> Thanks for all the details - I'll try to put together a patch in the
> next few days that adds bus_dmamap_sync() calls whereever there are
> shared access ordering requirements in the host controller drivers.
> As Olivier mentioned, bus_dma(9) says that this should be done even
> for BUS_DMA_COHERENT allocations, so adding them may fix problems on
> other platforms too.
>
> BTW it looks like some of the packet descriptor structures in the
> HC drivers currently throw away their bus_dma information, since
> the strutures are never freed, so adding the bus_dmamap_sync() calls
> will involve keeping track of them now.

Ok, thanks for looking into this!
At the moment I'm working on a driver for the USB device port that's on the 
ARM board. The driver is about half way being usefull. Once it's finished I 
can debug USB problems from the device perspective and see what data actually 
goes over the wire. That should show us what exactly goes wrong without the 
bus_dmapmap_sync() calls.

--
Daan