[Intel-gfx] [PATCH 33/39] drm/i915/perf: add a parameter to control the size of OA buffer

[Lionel Landwerlin]

On 22/08/2019 12:43, Joonas Lahtinen wrote:
> Quoting Lucas De Marchi (2019-08-16 11:04:57)
>> From: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
>>
>> The way our hardware is designed doesn't seem to let us use the
>> MI_RECORD_PERF_COUNT command without setting up a circular buffer.
>>
>> In the case where the user didn't request OA reports to be available
>> through the i915 perf stream, we can set the OA buffer to the minimum
>> size to avoid consuming memory which won't be used by the driver.
>>
>> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
>> Cc: Matthew Auld <matthew.auld at intel.com>
>> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
>> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
>> ---
>>   drivers/gpu/drm/i915/i915_perf.c | 98 +++++++++++++++++++++-----------
>>   drivers/gpu/drm/i915/i915_reg.h  |  2 +
>>   include/uapi/drm/i915_drm.h      |  7 +++
> Any patch touching i915_drm.h should have a link to the corresponding
> userspace series.
>
> Regards, Joonas
>
Might be worth dropping this patch from the series then.

I don't think we have anything public or any coming userspace release 
making use of this.


Cheers,


-Lionel