[Mesa-dev] [PATCH] r600g, radeonsi: add debug option which forces DMA for copy_region and blit

[Grigori Goronzy]

On 08.09.2014 14:50, Axel Davy wrote:
> Hi,
> 
> When reading si_dma.c code, it looks like the requested width of the
> copy is ignored except for PIPE_BUFFER.
> Perhaps that explains the bugs observed ?
>

It isn't ignored. Partial DMA copies (i.e. operations that do not copy
whole lines) are simply not supported right now, and will fall back to
resource_copy_region. In fact, it's even stricter: the picthes of source
and destination have to match.

Grigori

> Axel Davy
> 
> On 06/09/2014 19:14, Andy Furniss wrote :
>> Marek Olšák wrote:
>>> From: Marek Olšák <marek.olsak at amd.com>
>>>
>>> ---
>>>
>>> Turn this on, run piglit, and pray for mercy.
>>> It might be interesting to see if it makes 3D apps any faster. Or
>>> piglit.
>>
>> Well it's not piglit and I haven't benchmarked anything yet, but I get
>> a couple of faults at the start of Unigine Valley.
>>
>> [20635.429686] radeon 0000:01:00.0: GPU fault detected: 146 0x07bd3d14
>> [20635.429690] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR
>>   0x0000683D
>> [20635.429691] radeon 0000:01:00.0:
>> VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x1D03D014
>> [20635.429693] VM fault (0x04, vmid 14) at page 26685, write from DMA1
>> (61)
>> [20635.429708] radeon 0000:01:00.0: GPU fault detected: 146 0x07bd3d14
>> [20635.429709] radeon 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR
>>   0x00000000
>> [20635.429710] radeon 0000:01:00.0:
>> VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x1C03D00C
>> [20635.429711] VM fault (0x0c, vmid 14) at page 0, read from DMA1 (61)
>>
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> 
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