From: m.szyprowski@samsung.com (Marek Szyprowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCHv6 7/7] ARM: dma-mapping: add support for IOMMU mapper
Date: Fri, 24 Feb 2012 16:30:16 +0100 [thread overview]
Message-ID: <017701ccf309$357d6f90$a0784eb0$%szyprowski@samsung.com> (raw)
In-Reply-To: <201202241431.02170.arnd@arndb.de>
Hello,
On Friday, February 24, 2012 3:31 PM Arnd Bergmann wrote:
> On Friday 24 February 2012, Marek Szyprowski wrote:
> > I want to use some kind of chained arrays, each of at most of PAGE_SIZE. This code
> > doesn't really need to keep these page pointers in contiguous virtual memory area, so
> > it will not be a problem here.
> >
> Sounds like sg_alloc_table(), could you reuse that instead of rolling your own?
I only need to store 'struct page *' there. sg_alloc_table() operates on 'struct statterlist'
entries, which are 4 to 6 times larger than a simple 'struct page *' entry. I don't want to waste
so much memory just for reusing a two function. Implementing the same idea with pure
'struct page *' pointers will be just a matter of a few lines.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
next prev parent reply other threads:[~2012-02-24 15:30 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-10 18:58 [PATCHv6 0/7] ARM: DMA-mapping framework redesign Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 1/7] ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 2/7] ARM: dma-mapping: use asm-generic/dma-mapping-common.h Marek Szyprowski
2012-02-14 15:01 ` Konrad Rzeszutek Wilk
2012-02-10 18:58 ` [PATCHv6 3/7] ARM: dma-mapping: implement dma sg methods on top of any generic dma ops Marek Szyprowski
2012-02-14 15:02 ` Konrad Rzeszutek Wilk
2012-02-24 13:24 ` Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 4/7] ARM: dma-mapping: move all dma bounce code to separate dma ops structure Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 5/7] ARM: dma-mapping: remove redundant code and cleanup Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 6/7] ARM: dma-mapping: use alloc, mmap, free from dma_ops Marek Szyprowski
2012-02-10 18:58 ` [PATCHv6 7/7] ARM: dma-mapping: add support for IOMMU mapper Marek Szyprowski
2012-02-13 18:18 ` Krishna Reddy
2012-02-13 19:58 ` Krishna Reddy
2012-02-24 9:35 ` Marek Szyprowski
2012-02-24 12:49 ` Arnd Bergmann
2012-02-24 13:18 ` Marek Szyprowski
2012-02-24 14:31 ` Arnd Bergmann
2012-02-24 15:30 ` Marek Szyprowski [this message]
2012-02-14 14:55 ` Konrad Rzeszutek Wilk
2012-02-24 13:12 ` Marek Szyprowski
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