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From: Kieran Mansley <kmansley@solarflare.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com
Subject: Re: Getting a bus address for granted page in dom0
Date: Tue, 07 Nov 2006 15:34:56 +0000	[thread overview]
Message-ID: <1162913696.4141.28.camel@moonstone.uk.level5networks.com> (raw)
In-Reply-To: <C1761DE8.4168%Keir.Fraser@cl.cam.ac.uk>

On Tue, 2006-11-07 at 11:26 +0000, Keir Fraser wrote:
> Do you need to map the rings into dom0 addr space at all? If not just do a
> GNTMAP_device_map yourself, and this will return a dev_bus_addr that you can
> poke into hardware. If you go this route you avoid using the Linux DMA
> interfaces altogether.

Thanks Keir, that was exactly what I was looking for.

I've implemented this as an extra little helper function in
xenbus_backend_client.c as an alternative to xenbus_map_ring() and
xenbus_map_ring_valloc().  Is this something of wider use/interest?  I'd
be happy to submit a patch if so.

Kieran

  reply	other threads:[~2006-11-07 15:34 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-02 16:01 Getting a bus address for granted page in dom0 Kieran Mansley
2006-11-06 14:55 ` Kieran Mansley
2006-11-07 11:26   ` Keir Fraser
2006-11-07 15:34     ` Kieran Mansley [this message]
2007-06-18  9:44       ` tgh
2007-06-19  1:19       ` question about grant table tgh

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