Hi Wen and Laurent,
>
>> Also regarding to the VCMM (Virtual Contiguous Memory Manager) or CMA, is
>> it also an option?
>
> I'm not sure about VCMM, it seems to be an attempt to unify memory management
> across IOMMUs and system MMU. I don't think you need to worry about it now,
> IOMMU should be
Wang, Wen W wrote:
> Hi Hans,
>
> Thanks for your point and videobuf2 is also what I want to use.
>
> But since our development kernel version right now is still 2.6.35, I
> need to find way to work with current videobuf framework.
Hi Wen,
If you're bound to use that kernel version, then one op
er, Sundar; Yang, Jianwei;
> linux-media@vger.kernel.org; umg-meego-handset-ker...@umglistsvr.jf.intel.com
> Cc: Jozef Kruger
> Subject: Re: [Umg-meego-handset-kernel] Memory allocation in Video4Linux
>
> Hi Hari,
>
> You are right. What we need is virtual address.
>
> Current
Hi Wen,
On Thursday 10 February 2011 10:44:58 Wang, Wen W wrote:
> Hi Laurent,
>
> You make this very clear, thank you!
>
> The ISP on Medfield do have its own IOMMU. And I also think an IOMMU layer
> for ISP is needed.
>
> I'm not quite understand "unless hardware design doesn't give you a cho
Sundar; Yang, Jianwei;
>linux-media@vger.kernel.org; umg-meego-handset-ker...@umglistsvr.jf.intel.com;
>Jozef Kruger
>Subject: Re: Memory allocation in Video4Linux
>
>Hi Wen,
>
>On Thursday 10 February 2011 08:59:38 Gao, Bin wrote:
>> Penwell has IOMMU feature?
>> As far as I kno
Hi Wen,
On Thursday 10 February 2011 08:59:38 Gao, Bin wrote:
> Penwell has IOMMU feature?
> As far as I know only part of Intel server processors have this feature
> which is designed originally for VT(virtualization technology).
>
> Wen,
> Can you refer to other ISP Soc drivers and see how they
zef Kruger
Subject: Re: [Umg-meego-handset-kernel] Memory allocation in Video4Linux
Hi Hari,
You are right. What we need is virtual address.
Currently we alloc pages (alloc_pages()) for any request. Store those pages for
an image buffer into a list. We also manage the virtual address for ISP by
ou
Hi Wen,
Em 09-02-2011 04:23, Wang, Wen W escreveu:
> Hi,
>
> We are developing the image processor driver for Intel Medfield platform.
>
> We have received some comments on memory management that we should use
> standard Linux kernel interfaces for this, since we are doing everything by
> our
ianwei; linux-media@vger.kernel.org;
>조경호/S/W Solution개발팀(S.LSI)/E4(선임)/삼성전자
>Subject: RE: Memory allocation in Video4Linux
>
>
>Hi,
>
>Maybe VCM is helpful for you. Please refer to the following URL.
>http://marc.info/?l=linux-mm&m=129255940319217&w=2
>
>Best
ger.kernel.org [mailto:linux-media-
> ow...@vger.kernel.org] On Behalf Of Hans Verkuil
> Sent: Wednesday, February 09, 2011 4:52 PM
> To: Wang, Wen W; Jozef Kruger
> Cc: Kanigeri, Hari K; Iyer, Sundar; Yang, Jianwei; linux-media@vger.kernel.org
> Subject: Re: Memory allocation in Video4Linux
&
>Sent: 2011年2月9日 15:52
>To: Wang, Wen W; Jozef Kruger
>Cc: Kanigeri, Hari K; Iyer, Sundar; Yang, Jianwei; linux-media@vger.kernel.org
>Subject: Re: Memory allocation in Video4Linux
>
>On Wednesday, February 09, 2011 08:27:27 Wang, Wen W wrote:
>> Hi Hari,
>>
>&
nal Message-
> >From: Kanigeri, Hari K
> >Sent: 2011年2月9日 15:22
> >To: Iyer, Sundar; Wang, Wen W; Yang, Jianwei; linux-media@vger.kernel.org;
> >umg-meego-handset-ker...@umglistsvr.jf.intel.com
> >Cc: Jozef Kruger
> >Subject: RE: Memory allocation in Video4
y 09, 2011 12:20 PM
>> To: Wang, Wen W; Yang, Jianwei; linux-media@vger.kernel.org; umg-meego-
>> handset-ker...@umglistsvr.jf.intel.com
>> Cc: Jozef Kruger
>> Subject: Re: [Umg-meego-handset-kernel] Memory allocation in
>> Video4Linux
>>
>> I remember some Con
anwei; linux-media@vger.kernel.org; umg-meego-
> handset-ker...@umglistsvr.jf.intel.com
> Cc: Jozef Kruger
> Subject: Re: [Umg-meego-handset-kernel] Memory allocation in
> Video4Linux
>
> I remember some Continous Memory Allocator (CMA) being iterated down a
> few versions on
> some
r...@umglistsvr.jf.intel.com
> >Cc: Jozef Kruger
> >Subject: RE: Memory allocation in Video4Linux
> >
> >Curious for the below, why it is a sum? Will you use all of format at the
> >same time?
> >
> >>1 RAW16: 2*14 = 28MB
> >>1 qplane6: 6/4 *
Yes. Some are internal frame and yuv444 is the output.
>-Original Message-
>From: Yang, Jianwei
>Sent: 2011年2月9日 14:31
>To: Wang, Wen W; linux-media@vger.kernel.org;
>umg-meego-handset-ker...@umglistsvr.jf.intel.com
>Cc: Jozef Kruger
>Subject: RE: Memory allo
kernel.org; umg-meego-handset-
> ker...@umglistsvr.jf.intel.com
> Cc: Jozef Kruger
> Subject: [Umg-meego-handset-kernel] Memory allocation in Video4Linux
>
> Hi,
>
> We are developing the image processor driver for Intel Medfield platform.
>
> We have received some comments on memory manag
ego-handset-
> ker...@umglistsvr.jf.intel.com
> Cc: Jozef Kruger
> Subject: [Umg-meego-handset-kernel] Memory allocation in Video4Linux
>
> Hi,
>
> We are developing the image processor driver for Intel Medfield
> platform.
>
> We have received some comments on memor
Hi,
We are developing the image processor driver for Intel Medfield platform.
We have received some comments on memory management that we should use standard
Linux kernel interfaces for this, since we are doing everything by ourselves
including memory allocation (based on pages), page table ma
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