[Intel-gfx] [PATCH] drm/i915/guc: Support programming the EU priority in the GuC descriptor

[Ceraolo Spurio, Daniele]

On 5/3/2022 5:44 PM, Daniele Ceraolo Spurio wrote:
> From: Matthew Brost <matthew.brost at intel.com>
>
> The EU priority register must be updated by the GuC rather than the
> driver as it is context specific and only the GuC knows which context
> is currently executing.
>
> Cc: John Harrison <john.c.harrison at intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
> Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
> ---
>   drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> index 75291e9846c50..8f3ed60ff07d9 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -2420,6 +2420,8 @@ static void prepare_context_registration_info(struct intel_context *ce,
>   	 */
>   	info->hwlrca_lo = lower_32_bits(ce->lrc.lrca);
>   	info->hwlrca_hi = upper_32_bits(ce->lrc.lrca);
> +	if (engine->flags & I915_ENGINE_HAS_EU_PRIORITY)
> +		info->hwlrca_lo |= lrc_desc_priority(ce->guc_state.prio);

Just realized that I forgot to squash in a change when I moved branch 
(guc_state.prio is the GuC-side value while lrc_desc_priority expects 
the i915 one). Ignore this, will fix up and re-send later.

Daniele

>   	info->flags = CONTEXT_REGISTRATION_FLAG_KMD;
>   
>   	/*