Linux 2.6.39.4 in a AT91SAM9M10G45-EK 10 Mbytes dma buffer allocatiion

[Marcio]

Aptina MTP031

Enviado via iPhone

Em 24/05/2013, às 14:37, Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> escreveu:

> 
> On May 25, 2013, at 1:35 AM, Marcio Lima <marcio.lima54 at gmail.com> wrote:
> 
>> Thanks Jean
>> 
>> the image takes 10 Mbytes to be stored!
> 
> what sensor do you use?
> 
> 4Mpx?
> 
> Best Regards,
> J.
>> 
>> Regards
>> Marcio
>> 
>> Enviado via iPhone
>> 
>> Em 24/05/2013, às 14:19, Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> escreveu:
>> 
>>> On 09:35 Fri 24 May     , Marcio Campos de Lima wrote:
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Hi
>>>> I am running Linux 2.6.39.4 in a AT91SAM9M10G45-EK platfarm. I need to
>>>> allocate 10 Mbytes dma buffer to capture an image from a CMOS sensor. The
>>>> board has 128Mbytes of total memory and 110 Mbytes of free memory. Can
>>>> anybody help me?
>>>> Thanks
>>>> MArcio
>>> 
>>> 10MiB? why that much?
>>> 
>>> you can not allowcate thar much on dma_alloc_coherent you need to use CMA
>>> 
>>> Best Regards,
>>> J.
>>>> 
>>>> at mm/page_alloc.c:2033 __alloc_pages_nodemask+0x140/0x5f8)
>>>> ht      = 19Modules linked
>>>> in:44;                                               
>>>> 
>>>> 
>>>> fmt.fmt.pix.[] (unwind_backtrace+0x0/0xe4) from [] (warn_sl)
>>>> pixelformat [] (warn_slowpath_common+0x4c/0x64) from [] (wa)
>>>> =30314742;                                                                  
>>>> 
>>>> f[] (warn_slowpath_null+0x18/0x1c) from [] (__alloc_pages_n)
>>>> mt.fmt.pix.fiel[] (__alloc_pages_nodemask+0x140/0x5f8) from [d       =
>>>> c72b2[] (__dma_alloc+0x94/0x2d8) from [] (dma_all)
>>>> cc8                                                                         
>>>> 
>>>> MARCIO[] (dma_alloc_coherent+0x54/0x60) from [] (vb2_dma_co)
>>>> : init_mmap: i[] (vb2_dma_contig_alloc+0x38/0xb4) from [] ()
>>>> nit                                                                         
>>>> 
>>>> [] (vb2_reqbufs+0x3b4/0x750) from [] (soc_camera_reqbufs+0x)
>>>> [] (soc_camera_reqbufs+0xbc/0x134) from [] (__video_do_ioct)
>>>> [] (__video_do_ioctl+0x1de0/0x4a24) from [] (video_usercopy)
>>>> [] (video_usercopy+0x358/0x48c) from [] (v4l2_ioctl+0x68/0x)
>>>> [] (v4l2_ioctl+0x68/0x114) from [] (vfs_ioctl+0x20/0x3c)    
>>>> [] (vfs_ioctl+0x20/0x3c) from [] (do_vfs_ioctl+0x520/0x578) 
>>>> [] (do_vfs_ioctl+0x520/0x578) from [] (sys_ioctl+0x34/0x54) 
>>>> [] (sys_ioctl+0x34/0x54) from [] (ret_fast_syscall+0x0/0x2c)
>>>> ---[ end trace acfd933d374f6f12
>>>> ]---                                            
>>>> atmel_isi atmel_isi.0: dma_alloc_coherent of size 10077696
>>>> failed               
>>>> MARCIO: __vb2_queue_alloc
>>>> ret=-12                                               
>>>> MARCIO: __vb2_queue_alloc
>>>> q->num_buffers=0                                      
>>>> MARCIO: vb2_reqbufs req->count=2 ret=0
>>>> num_buffers=1                            
>>>> MARCIO: vb2_reqbufs req->count=2 num_buffers=1
>>>> ret=0                            
>>>> MARCIO:vb2_reqbufs soc_camera_reqbufs ret=-12 icd->vb2_vidq=1 
>>>> p=1              
>>>> MARCIO:soc_camera_reqbufs
>>>> ret=-12                                               
>>>> VIDIOC_REQBUFS error 12, Out of memory
>>>> 
>>>> 
>>>> 
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>>> 
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>