From: Matt Porter <mporter@kernel.crashing.org>
To: Dan Malek <dan@embeddededge.com>
Cc: Tom Rini <trini@kernel.crashing.org>,
linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: [PATCH 03/04] Freescale Ethernet combined driver
Date: Tue, 10 May 2005 06:27:44 -0700 [thread overview]
Message-ID: <20050510062744.A21835@cox.net> (raw)
In-Reply-To: <f1e15a8d9ed033e850b56ca965754a43@embeddededge.com>; from dan@embeddededge.com on Tue, May 10, 2005 at 08:13:48AM -0400
On Tue, May 10, 2005 at 08:13:48AM -0400, Dan Malek wrote:
>
> On May 10, 2005, at 7:17 AM, Pantelis Antoniou wrote:
>
> > This patch replace iopa use with virt_to_phys.
>
> Not gonna work .....
>
> When you map uncached on 8xx you get a new vmalloc()
> space. The virt_to_xxx macros don't work on those addresses.
> You need to use the dma_consistent() function, stash the
> real physical address it returns and then use it where
> appropriate.
That and the use of virt_to_* and friends is deprecated by
the DMA API. You'll never get that upstream even if it were
a case where it did work. That's a good thing to know for
anybody doing other drivers...
-Matt
next prev parent reply other threads:[~2005-05-10 13:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-09 11:45 [PATCH 03/04] Freescale Ethernet combined driver Pantelis Antoniou
2005-05-09 20:38 ` Matt Porter
2005-05-10 11:17 ` Pantelis Antoniou
2005-05-10 12:13 ` Dan Malek
2005-05-10 12:15 ` Pantelis Antoniou
2005-05-10 13:27 ` Matt Porter [this message]
2005-05-10 13:14 ` Pantelis Antoniou
2005-05-10 13:47 ` Matt Porter
2005-05-10 13:36 ` Pantelis Antoniou
2005-05-12 9:37 ` Pantelis Antoniou
2005-05-13 8:51 ` Pantelis Antoniou
2005-05-10 18:14 ` Dan Malek
-- strict thread matches above, loose matches on Subject: below --
2005-05-10 14:53 Rune Torgersen
2005-05-10 18:24 ` Dan Malek
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