From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: David VomLehn <dvomlehn@cisco.com>
Cc: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: Re: [PATCH 2/2] Set of fixes for DMA when dma_addr_t != physical address
Date: Thu, 26 Nov 2009 00:10:06 +0100 [thread overview]
Message-ID: <20091125231006.GA12699@alpha.franken.de> (raw)
In-Reply-To: <20091125200027.GA13748@dvomlehn-lnx2.corp.sa.net>
On Wed, Nov 25, 2009 at 03:00:28PM -0500, David VomLehn wrote:
> Fixes for using DMA on systems where the DMA address and the physical address
> differ.
what's the problem ? Even the old Olivetti M700 has an iommu, so dma
address and physical address are always different... and it works without
changes. You just need to tweak the plat_dma_XXX() macros/functions.
And I don't see a reason for the KSEG0 checks in your other patch,
but maybe I'm missing something...
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessary a
good idea. [ RFC1925, 2.3 ]
next prev parent reply other threads:[~2009-11-25 23:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-25 20:00 [PATCH 2/2] Set of fixes for DMA when dma_addr_t != physical address David VomLehn
2009-11-25 23:10 ` Thomas Bogendoerfer [this message]
2009-12-01 3:58 ` Ralf Baechle
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