From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: fujita.tomonori@lab.ntt.co.jp, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH V2 2/3] powerpc: Add support for swiotlb on 32-bit
Date: Tue, 19 May 2009 07:49:55 +1000 [thread overview]
Message-ID: <1242683395.16901.0.camel@pasglop> (raw)
In-Reply-To: <DE108B1C-85A6-4D1F-8E4D-E1AB5495578A@kernel.crashing.org>
On Mon, 2009-05-18 at 08:25 -0500, Kumar Gala wrote:
>
> Part of this is how the generic swiotlb code works and part of it
> was
> our desire not to bloat dev archdata by adding such info that as you
> say is either bus specific or conveyed in the dma addr mask.
Right but perf sucks :-)
Maybe an option is to clamp the DMA mask when it's set by the driver to
limit it to the available inbound window ?
Cheers,
Ben.
next prev parent reply other threads:[~2009-05-18 21:50 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-14 22:42 [PATCH V2 1/3] powerpc: Use sg->dma_length in sg_dma_len() macro on 32-bit Becky Bruce
2009-05-14 22:42 ` [PATCH V2 2/3] powerpc: Add support for swiotlb " Becky Bruce
2009-05-14 22:42 ` [PATCH V2 3/3] powerpc: Add 86xx support for SWIOTLB Becky Bruce
2009-05-15 4:49 ` [PATCH V2 2/3] powerpc: Add support for swiotlb on 32-bit Kumar Gala
2009-05-18 4:49 ` Benjamin Herrenschmidt
2009-05-18 13:25 ` Kumar Gala
2009-05-18 21:49 ` Benjamin Herrenschmidt [this message]
2009-05-19 13:04 ` Kumar Gala
2009-05-19 20:06 ` Becky Bruce
2009-05-28 4:42 ` Kumar Gala
2009-05-28 6:11 ` Benjamin Herrenschmidt
2009-05-28 13:06 ` Kumar Gala
2009-05-19 5:27 ` FUJITA Tomonori
2009-05-19 20:57 ` Becky Bruce
2009-05-21 17:43 ` Jeremy Fitzhardinge
2009-05-21 18:27 ` Becky Bruce
2009-05-21 19:01 ` Ian Campbell
2009-05-22 10:51 ` FUJITA Tomonori
2009-05-21 20:18 ` Jeremy Fitzhardinge
2009-05-21 22:08 ` Ian Campbell
2009-05-22 10:51 ` FUJITA Tomonori
2009-05-27 19:05 ` Becky Bruce
2009-05-22 11:11 ` Ian Campbell
2009-05-22 23:55 ` Jeremy Fitzhardinge
2009-05-23 22:59 ` Leon Woestenberg
2009-05-26 12:51 ` Ian Campbell
2009-05-27 19:11 ` Becky Bruce
2009-05-27 19:05 ` Becky Bruce
2009-05-27 20:29 ` Ian Campbell
2009-05-27 22:11 ` Becky Bruce
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