From: Andi Kleen <ak@suse.de>
To: Matt Porter <mporter@embeddedalley.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
gregkh@suse.de
Subject: Re: [RFC] Simple userspace interface for PCI drivers
Date: 31 Aug 2006 15:49:10 +0200 [thread overview]
Message-ID: <p73pseh582x.fsf@verdi.suse.de> (raw)
In-Reply-To: <20060830143410.GB19477@gate.crashing.org>
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.
Then it should hopefully just work.
-Andi
next prev parent reply other threads:[~2006-08-31 13:49 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 [this message]
2006-09-01 18:16 ` Greg KH
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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