From: Avi Kivity <avi@redhat.com>
To: Leon Woestenberg <leon.woestenberg@gmail.com>
Cc: Tom Lyon <pugs@cisco.com>,
mst@redhat.com, hjk@linutronix.de, gregkh@suse.de,
chrisw@sous-sol.org, joro@8bytes.org,
linux-kernel@vger.kernel.org
Subject: Re: UIO DMA to userspace question
Date: Sun, 15 Aug 2010 14:33:08 +0300 [thread overview]
Message-ID: <4C67D074.6080107@redhat.com> (raw)
In-Reply-To: <AANLkTimWdaBrJz-dQ3MHWwG7iZ5m1opSmLFKva880csi@mail.gmail.com>
On 08/07/2010 09:38 PM, Leon Woestenberg wrote:
> Hello all,
>
> can I use the UIO framework for the following?
>
> The userspace portion of the driver allocates memory in user-space
> using malloc() - usually resulting in a scatter pages in physical
> memory.
> The UIO kernel portion of the driver maps those using pci_map_sg().
>
> Is this possible, or does the UIO framework assume memory for DMA is
> allocated in kernel space?
Look at the new VFIO driver, which can do DMA if you have an IOMMU.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2010-08-15 15:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-07 18:38 UIO DMA to userspace question Leon Woestenberg
2010-08-09 11:11 ` Hans J. Koch
2010-08-10 0:12 ` Hans J. Koch
2010-08-11 18:42 ` Leon Woestenberg
2010-08-12 0:14 ` Hans J. Koch
2010-08-15 11:33 ` Avi Kivity [this message]
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