From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
To: galak@kernel.crashing.org
Cc: fujita.tomonori@lab.ntt.co.jp, jeremy@goop.org,
hch@infradead.org, linux-kernel@vger.kernel.org, mingo@elte.hu,
ian.campbell@citrix.com, beckyb@kernel.crashing.org
Subject: Re: [PATCH 4/7] swiotlb: Allow arch override of address_needs_mapping
Date: Fri, 10 Apr 2009 03:50:13 +0900 [thread overview]
Message-ID: <20090410035037U.fujita.tomonori@lab.ntt.co.jp> (raw)
In-Reply-To: <4D1571C8-53B8-4A4E-BCE8-7267ED262189@kernel.crashing.org>
On Wed, 8 Apr 2009 23:59:18 -0500
Kumar Gala <galak@kernel.crashing.org> wrote:
>
> On Apr 8, 2009, at 6:01 PM, FUJITA Tomonori wrote:
>
> >> Becky's patches of last week also added __weak annotations to
> >> swiotlb_bus_to_virt, virt_to_bus and bus_to_phys; added the hwdev
> >> parameter to swiotlb_bus_to_phys; and added a weak
> >> swiotlb_arch_address_needs_mapping. I assume that was needed because
> >> powerpc needs non-trivial implementations for those functions.
> >
> > Hmm, what she added are wrappers of virt_to_bus and bus_to_virt. We
> > can remove these and directly use virt_to_bus and bus_to_virt.
> >
> > About __weak address_needs_mapping function, as I said, removing it
> > and using dma_map_ops is a proper solution.
>
> Is this something you are looking at doing in the .31 timeframe?
>
> I'm looking at the fact that we need to switch over to using struct
> dma_map_ops on ppc. (I'm guessing this might be the patches you
> mentioned the other day). If so did you add set_dma_mask() to the
> generic dma_map_ops?
Yeah, I'll send patches to convert ppc to use dma_map_ops. In .31
timeframe, I plan to:
- add a generic dma-mapping.h and convert ia64, x86, and ppc to use it
- clean up swiotlb.
- try to convert archs supporting multiple dma ops to use dma_map_ops
- rewrite ia64 and x86 dma ops initialization
BTW, the ppc specific swiotlb patchset is available?
next prev parent reply other threads:[~2009-04-09 18:51 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 14:09 [PATCH V3 0/7] swiotlb: changes for powerpc/highmem Kumar Gala
2009-04-08 14:09 ` [PATCH 1/7] swiotlb: comment corrections (no code changes) Kumar Gala
2009-04-08 14:09 ` [PATCH 2/7] swiotlb: fix compile warning Kumar Gala
2009-04-08 14:09 ` [PATCH 3/7] swiotlb: map_page fix for highmem systems Kumar Gala
2009-04-08 14:09 ` [PATCH 4/7] swiotlb: Allow arch override of address_needs_mapping Kumar Gala
2009-04-08 14:09 ` [PATCH 5/7] swiotlb: Rename unmap_single to do_unmap_single Kumar Gala
2009-04-08 14:09 ` [PATCH 6/7] swiotlb: Use swiotlb_sync_single instead of duplicating code Kumar Gala
2009-04-08 14:09 ` [PATCH 7/7] swiotlb: Change swiotlb_bus_to[phys,virt] prototypes Kumar Gala
2009-04-08 15:25 ` [tip:core/iommu] swiotlb: change " Becky Bruce
2009-04-08 15:25 ` [tip:core/iommu] swiotlb: use swiotlb_sync_single instead of duplicating code Becky Bruce
2009-04-08 15:25 ` [tip:core/iommu] swiotlb: rename unmap_single to do_unmap_single Becky Bruce
2009-04-08 15:25 ` [tip:core/iommu] swiotlb: allow arch override of address_needs_mapping Becky Bruce
2009-04-08 20:38 ` [PATCH 4/7] swiotlb: Allow " Christoph Hellwig
2009-04-08 20:56 ` Kumar Gala
2009-04-08 21:15 ` FUJITA Tomonori
2009-04-08 21:55 ` Jeremy Fitzhardinge
2009-04-08 22:10 ` FUJITA Tomonori
2009-04-08 22:36 ` Jeremy Fitzhardinge
2009-04-08 23:01 ` FUJITA Tomonori
2009-04-08 23:16 ` Jeremy Fitzhardinge
2009-04-08 23:37 ` FUJITA Tomonori
2009-04-09 0:09 ` Jeremy Fitzhardinge
2009-04-09 4:43 ` Kumar Gala
2009-04-09 18:34 ` FUJITA Tomonori
2009-04-09 19:19 ` Jeremy Fitzhardinge
2009-04-09 19:43 ` FUJITA Tomonori
2009-04-09 19:50 ` FUJITA Tomonori
2009-04-09 19:54 ` Jeremy Fitzhardinge
2009-04-09 4:59 ` Kumar Gala
2009-04-09 18:50 ` FUJITA Tomonori [this message]
2009-04-09 20:10 ` Kumar Gala
2009-04-09 20:25 ` Kumar Gala
2009-04-08 22:24 ` Christoph Hellwig
2009-04-08 15:24 ` [tip:core/iommu] swiotlb: map_page fix for highmem systems Becky Bruce
2009-04-08 15:24 ` [tip:core/iommu] swiotlb: fix compile warning Becky Bruce
2009-04-08 15:24 ` [tip:core/iommu] swiotlb: comment corrections Becky Bruce
2009-04-08 14:21 ` [PATCH V3 0/7] swiotlb: changes for powerpc/highmem Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2009-04-04 1:56 [PATCH V2 " Becky Bruce
2009-04-04 1:56 ` [PATCH 1/7] swiotlb: comment corrections (no code changes) Becky Bruce
2009-04-04 1:56 ` [PATCH 2/7] swiotlb: fix compile warning Becky Bruce
2009-04-04 1:56 ` [PATCH 3/7] swiotlb: map_page fix for highmem systems Becky Bruce
2009-04-04 1:56 ` [PATCH 4/7] swiotlb: Allow arch override of address_needs_mapping Becky Bruce
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