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

[Joonas Lahtinen]

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