From: Adrian Cox <adrian@humboldt.co.uk>
To: Phil.Nitschke@avalon.com.au
Cc: linuxppc-embedded <Linuxppc-embedded@ozlabs.org>
Subject: Re: linux DMA capabilities in MV64460
Date: Wed, 08 Mar 2006 22:36:18 +0000 [thread overview]
Message-ID: <1141857378.28095.22.camel@localhost.localdomain> (raw)
In-Reply-To: <kwlkvomcxp.fsf@lamorak.int.avalon.com.au>
On Mon, 2006-03-06 at 14:39 +1030, Phil Nitschke wrote:
> How is a DMA controlled (from a device driver writer's perspective) when
> a third-party (i.e. in the bridge) DMA controller needs to do the work
> to get the data from a PCI Target into main memory?
>
> What kernel API should be provided by the DMA Controller Driver?
There is no current API for this in the kernel, but there are some
proposals. From Intel, we have I/OAT, which targets network operations:
http://lkml.org/lkml/2006/3/3/219
There's some overlap with the ADMA feature set, which is intended to
accelerate RAID operations:
http://lkml.org/lkml/2006/2/2/442
--
Adrian Cox <adrian@humboldt.co.uk>
next prev parent reply other threads:[~2006-03-08 22:36 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <kw3bkovcup.fsf@lamorak.int.avalon.com.au>
2005-12-20 1:01 ` linux DMA capabilities in MV64460 Mark A. Greer
2005-12-20 14:27 ` Brian Waite
2005-12-20 17:54 ` Mark A. Greer
2005-12-22 0:54 ` Phil Nitschke
2006-03-06 4:09 ` Phil Nitschke
2006-03-06 13:21 ` Brian Waite
2006-03-08 14:02 ` Phil Nitschke
2006-03-08 22:36 ` Adrian Cox [this message]
2006-03-09 8:02 ` Phil Nitschke
2005-12-22 2:59 KokHow Teh
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