From: Subash Patel <subashrp@gmail.com>
To: KyongHo Cho <pullip.cho@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
linux-arm-kernel@lists.infradead.org,
linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
iommu@lists.linux-foundation.org,
Shariq Hasnain <shariq.hasnain@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Krishna Reddy <vdumpa@nvidia.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Andrzej Pietrasiewicz <andrzej.p@samsung.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Chunsang Jeong <chunsang.jeong@linaro.org>
Subject: Re: [PATCHv7 9/9] ARM: dma-mapping: add support for IOMMU mapper
Date: Thu, 22 Mar 2012 19:29:42 +0530 [thread overview]
Message-ID: <4F6B304E.5010402@gmail.com> (raw)
In-Reply-To: <CAHQjnOMjSPDOymJe356AWnJszQv+X-QWrVrB7ahYDkXBr5HrQw@mail.gmail.com>
Hi KyongHo,
On 03/21/2012 05:26 AM, KyongHo Cho wrote:
> On Tue, Mar 20, 2012 at 10:50 PM, Subash Patel<subashrp@gmail.com> wrote:
>> Sorry for digging this very late. But as part of integrating dma_map v7&
>> sysmmu v12 on 3.3-rc5, I am facing below issue:
>>
>> a) By un-selecting IOMMU in menu config, I am able to allocate memory in
>> vb2-dma-contig
>>
>> b) When I enable SYSMMU support for the IP's, I am receiving below fault:
>>
>> Unhandled fault: external abort on non-linefetch (0x818) at 0xb6f55000
>>
>> I think this has something to do with the access to the SYSMMU registers for
>> writing the page table. Has anyone of you faced this issue while testing
>> these(dma_map+iommu) patches on kernel mentioned above? This must be
>> something related to recent changes, as I didn't have issues with these
>> patches on 3.2 kernel.
>>
>
> 0xb6f55000 is not an address of SYSMMU register if your kernel starts
> at 0xc0000000.
>
> Can you tell me any detailed information or situation?
I hate to say this, but I am not able to catch the fault location even
with JTAG. Once the fault comes, the debugger looses all control over. I
think now possible method is reproduction at your end :)
>
> Regards,
>
> KyongHo.
Regards,
Subash
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next prev parent reply other threads:[~2012-03-22 13:59 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-29 15:04 [PATCHv7 0/9] ARM: DMA-mapping framework redesign Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 1/9] ARM: dma-mapping: introduce ARM_DMA_ERROR constant Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 2/9] ARM: dma-mapping: use pr_* instread of printk Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 3/9] ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 4/9] ARM: dma-mapping: use asm-generic/dma-mapping-common.h Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 5/9] ARM: dma-mapping: implement dma sg methods on top of any generic dma ops Marek Szyprowski
2012-03-26 11:38 ` Subash Patel
2012-02-29 15:04 ` [PATCHv7 6/9] ARM: dma-mapping: move all dma bounce code to separate dma ops structure Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 7/9] ARM: dma-mapping: remove redundant code and cleanup Marek Szyprowski
2012-02-29 15:04 ` [PATCHv7 8/9] ARM: dma-mapping: use alloc, mmap, free from dma_ops Marek Szyprowski
2012-03-22 13:45 ` Subash Patel
2012-03-23 12:12 ` Marek Szyprowski
2012-03-23 12:26 ` [PATCH 0/2] ARM: dma-mapping: Fix mmap support for coherent buffers Marek Szyprowski
2012-03-23 12:26 ` [PATCH 1/2] common: add dma_mmap_from_coherent() function Marek Szyprowski
2012-03-23 12:26 ` [PATCH 2/2] arm: dma-mapping: use dma_mmap_from_coherent() Marek Szyprowski
2012-03-26 11:04 ` [PATCH 0/2] ARM: dma-mapping: Fix mmap support for coherent buffers Subash Patel
2012-02-29 15:04 ` [PATCHv7 9/9] ARM: dma-mapping: add support for IOMMU mapper Marek Szyprowski
2012-03-02 8:05 ` KyongHo Cho
2012-03-02 11:07 ` Marek Szyprowski
2012-03-20 13:50 ` Subash Patel
2012-03-20 23:56 ` KyongHo Cho
2012-03-22 13:59 ` Subash Patel [this message]
2012-03-30 7:14 ` Subash Patel
2012-03-05 11:47 ` Hiroshi Doyu
2012-03-05 16:07 ` Marek Szyprowski
2012-03-06 22:48 ` Krishna Reddy
2012-03-07 6:09 ` Hiroshi Doyu
2012-03-07 6:37 ` Hiroshi Doyu
2012-03-07 7:06 ` Krishna Reddy
2012-03-07 7:16 ` Hiroshi Doyu
2012-03-07 16:58 ` Marek Szyprowski
2012-03-09 14:53 ` [PATCH] ARM: dma-mapping: fix calculation of iova bitmap size Marek Szyprowski
2012-03-06 23:21 ` [PATCHv7 9/9] ARM: dma-mapping: add support for IOMMU mapper Russell King - ARM Linux
2012-03-06 23:36 ` Krishna Reddy
2012-03-07 16:17 ` Marek Szyprowski
2012-03-29 7:19 ` Hiroshi Doyu
2012-03-29 8:00 ` Marek Szyprowski
2012-03-30 2:24 ` Krishna Reddy
2012-03-30 6:30 ` Marek Szyprowski
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