From: Eugene Surovegin <ebs@ebshome.net>
To: John Whitney <johnw@sands-edge.com>
Cc: Christoph Hellwig <hch@lst.de>, linuxppc-dev@lists.linuxppc.org
Subject: Re: Proposed changes to io.h
Date: Wed, 31 Mar 2004 13:52:48 -0800 [thread overview]
Message-ID: <20040331215248.GB831@gate.ebshome.net> (raw)
In-Reply-To: <A973047C-8357-11D8-9FF0-000A95A07384@sands-edge.com>
On Wed, Mar 31, 2004 at 04:09:13PM -0500, John Whitney wrote:
>
> >>1. Modifications to virt_to_bus, bus_to_virt, virt_to_phys, and
> >>phys_to_virt. With the use of fully virtual addresses for
> >
> >These are all obsolete interface and you're not supposed to use them
> >for new plattforms or drivers at all.
> >
>
> pci_map_single() (include/asm-ppc/pci.h) and dma_map_single()
> (include/asm-ppc/dma-mapping.h) use virt_to_bus(). Shouldn't some care
> be taken to ensure that ANY virtual address passed to these routines
> maps to the correct physical (bus) address?
>
Please, read DMA-mapping.txt, it's quite clear on what memory is considered
DMA'able.
Eugene.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-03-31 21:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-31 15:44 Proposed changes to io.h John Whitney
2004-03-31 16:44 ` Eugene Surovegin
2004-03-31 16:58 ` Dan Malek
2004-03-31 17:30 ` Matt Porter
2004-03-31 17:32 ` John Whitney
2004-03-31 17:40 ` Dan Malek
2004-03-31 17:03 ` Matt Porter
2004-03-31 19:57 ` John Whitney
2004-03-31 22:07 ` Matt Porter
2004-03-31 22:25 ` John Whitney
2004-03-31 22:52 ` Dan Malek
2004-04-01 5:30 ` Kumar Gala
2004-03-31 17:01 ` Matt Porter
2004-03-31 17:29 ` Dan Malek
2004-03-31 18:18 ` Christoph Hellwig
2004-03-31 18:40 ` John Whitney
2004-03-31 18:43 ` Christoph Hellwig
2004-03-31 18:50 ` John Whitney
2004-03-31 21:09 ` John Whitney
2004-03-31 21:49 ` Dan Malek
2004-03-31 21:52 ` Eugene Surovegin [this message]
2004-03-31 22:07 ` John Whitney
2004-04-01 2:52 ` Benjamin Herrenschmidt
[not found] ` <209F76E4-838B-11D8-9FF0-000A95A07384@sands-edge.com>
[not found] ` <1080790433.1433.59.camel@gaston>
[not found] ` <43B0E668-84BC-11D8-9FF0-000A95A07384@sands-edge.com>
2004-04-03 3:04 ` Benjamin Herrenschmidt
2004-04-03 3:40 ` John Whitney
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