[Intel-gfx] [PATCH v5 2/2] drm/i915/guc: Remove intel_context:number_committed_requests counter

[John Harrison]

On 10/6/2022 15:51, Alan Previn wrote:
> With the introduction of the delayed disable-sched behavior,
> we use the GuC's xarray of valid guc-id's as a way to
> identify if new requests had been added to a context
> when the said context is being checked for closure.
>
> Additionally that prior change also closes the race for when
> a new incoming request fails to cancel the pending
> delayed disable-sched worker.
>
> With these two complementary checks, we see no more
> use for intel_context:guc_state:number_committed_requests.
>
> Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: John Harrison <John.C.Harrison at Intel.com>

> ---
>   drivers/gpu/drm/i915/gt/intel_context_types.h |  2 --
>   .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 23 -------------------
>   2 files changed, 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
> index 6a49fa7e119f..e36670f2e626 100644
> --- a/drivers/gpu/drm/i915/gt/intel_context_types.h
> +++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
> @@ -199,8 +199,6 @@ struct intel_context {
>   		 * context's submissions is complete.
>   		 */
>   		struct i915_sw_fence blocked;
> -		/** @number_committed_requests: number of committed requests */
> -		int number_committed_requests;
>   		/** @requests: list of active requests on this context */
>   		struct list_head requests;
>   		/** @prio: the context's current guc priority */
> 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 3cfdb0a5e5bb..b91c3085501d 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -370,25 +370,6 @@ static inline void decr_context_blocked(struct intel_context *ce)
>   	ce->guc_state.sched_state -= SCHED_STATE_BLOCKED;
>   }
>   
> -static inline bool context_has_committed_requests(struct intel_context *ce)
> -{
> -	return !!ce->guc_state.number_committed_requests;
> -}
> -
> -static inline void incr_context_committed_requests(struct intel_context *ce)
> -{
> -	lockdep_assert_held(&ce->guc_state.lock);
> -	++ce->guc_state.number_committed_requests;
> -	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
> -}
> -
> -static inline void decr_context_committed_requests(struct intel_context *ce)
> -{
> -	lockdep_assert_held(&ce->guc_state.lock);
> -	--ce->guc_state.number_committed_requests;
> -	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
> -}
> -
>   static struct intel_context *
>   request_to_scheduling_context(struct i915_request *rq)
>   {
> @@ -3172,7 +3153,6 @@ static void __guc_context_destroy(struct intel_context *ce)
>   		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
>   		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
>   		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
> -	GEM_BUG_ON(ce->guc_state.number_committed_requests);
>   
>   	lrc_fini(ce);
>   	intel_context_fini(ce);
> @@ -3441,8 +3421,6 @@ static void remove_from_context(struct i915_request *rq)
>   
>   	guc_prio_fini(rq, ce);
>   
> -	decr_context_committed_requests(ce);
> -
>   	spin_unlock_irq(&ce->guc_state.lock);
>   
>   	atomic_dec(&ce->guc_id.ref);
> @@ -3651,7 +3629,6 @@ static int guc_request_alloc(struct i915_request *rq)
>   
>   		list_add_tail(&rq->guc_fence_link, &ce->guc_state.fences);
>   	}
> -	incr_context_committed_requests(ce);
>   	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
>   
>   	return 0;