From: Greg KH <gregkh@suse.de>
To: Andi Kleen <ak@suse.de>
Cc: Matt Porter <mporter@embeddedalley.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [RFC] Simple userspace interface for PCI drivers
Date: Fri, 1 Sep 2006 11:16:58 -0700 [thread overview]
Message-ID: <20060901181658.GE1322@suse.de> (raw)
In-Reply-To: <p73pseh582x.fsf@verdi.suse.de>
On Thu, Aug 31, 2006 at 03:49:10PM +0200, Andi Kleen wrote:
> Matt Porter <mporter@embeddedalley.com> writes:
> >
> > What about portable access to the PCI DMA API from userspace?
>
> We'll definitely need this for X11 anyways. Currently it is not
> possible to run the standard X server with a IOMMU that isolates
> the graphics card because it has no way to get at the GPU MMIO
> registers then.
>
> My long-term plan was to integrate it in /sys/bus/pci mmaps
> (together with PAT etc.). When you mmap it there the kernel
> allocates a DMA mapping and then frees it on unmap.
That sounds very reasonable, looking forward to it.
thanks,
greg k-h
next prev parent reply other threads:[~2006-09-01 18:23 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 6:23 [RFC] Simple userspace interface for PCI drivers Greg KH
2006-08-30 10:09 ` Thomas Gleixner
2006-08-30 14:34 ` Matt Porter
2006-08-30 16:25 ` Thomas Gleixner
2006-08-30 17:55 ` Greg KH
2006-08-30 20:32 ` Foli Ayivoh
2006-08-30 21:01 ` Matthias Schniedermeyer
2006-08-30 21:25 ` linux-os (Dick Johnson)
2006-08-30 22:08 ` Greg KH
2006-09-01 1:36 ` Brice Goglin
2006-09-01 3:22 ` Greg KH
2006-09-01 3:37 ` Brice Goglin
2006-09-01 4:27 ` Greg KH
2006-08-31 13:49 ` Andi Kleen
2006-09-01 18:16 ` Greg KH [this message]
2006-08-30 17:07 ` Manu Abraham
2006-08-30 17:52 ` Greg KH
2006-08-30 22:50 ` Manu Abraham
2006-08-31 0:17 ` Greg KH
2006-08-31 13:24 ` Manu Abraham
2006-08-31 22:42 ` Greg KH
2006-08-31 7:40 ` Andrew Morton
2006-08-31 8:05 ` Thomas Gleixner
2006-08-31 8:30 ` Xavier Bestel
2006-08-31 20:39 ` Lee Revell
2006-08-31 20:53 ` Chris Friesen
2006-08-31 21:39 ` Greg KH
2006-08-31 20:58 ` Xavier Bestel
2006-08-31 21:12 ` Lee Revell
2006-08-31 21:18 ` Xavier Bestel
2006-08-31 21:33 ` Manu Abraham
2006-08-31 21:40 ` Greg KH
2006-09-01 21:17 ` Pavel Machek
2006-09-03 8:34 ` Thomas Gleixner
2006-09-12 19:47 ` Sam Ravnborg
2006-09-14 5:57 ` Greg KH
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