Re: [PATCH 20/57] drm/i915: Wrap access to intel_engine.active

[Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>]

On 01/02/2021 08:56, Chris Wilson wrote:
> As we are about to shuffle the lists around to consolidate new control
> objects, reduce the code movement by wrapping access to the scheduler
> lists ahead of time.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
>   drivers/gpu/drm/i915/gt/intel_engine_cs.c     | 17 +++---
>   drivers/gpu/drm/i915/gt/intel_engine_types.h  | 11 +++-
>   .../drm/i915/gt/intel_execlists_submission.c  | 58 +++++++++++--------
>   .../gpu/drm/i915/gt/intel_ring_submission.c   | 14 +++--
>   drivers/gpu/drm/i915/gt/mock_engine.c         |  7 ++-
>   drivers/gpu/drm/i915/gt/selftest_execlists.c  |  6 +-
>   .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 20 ++++---
>   drivers/gpu/drm/i915/i915_gpu_error.c         |  5 +-
>   drivers/gpu/drm/i915/i915_request.c           | 23 +++-----
>   drivers/gpu/drm/i915/i915_request.h           |  8 ++-
>   drivers/gpu/drm/i915/i915_scheduler.c         | 47 ++++++++-------
>   drivers/gpu/drm/i915/i915_scheduler_types.h   |  4 +-
>   .../gpu/drm/i915/selftests/i915_scheduler.c   | 19 +++---
>   13 files changed, 141 insertions(+), 98 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> index e55e57b6edf6..a2916c7fcc48 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> @@ -725,6 +725,7 @@ struct measure_breadcrumb {
>   static int measure_breadcrumb_dw(struct intel_context *ce)
>   {
>   	struct intel_engine_cs *engine = ce->engine;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct measure_breadcrumb *frame;
>   	int dw;
>   
> @@ -747,11 +748,11 @@ static int measure_breadcrumb_dw(struct intel_context *ce)
>   	frame->rq.ring = &frame->ring;
>   
>   	mutex_lock(&ce->timeline->mutex);
> -	spin_lock_irq(&engine->active.lock);
> +	spin_lock_irq(&se->lock);
>   
>   	dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs;
>   
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   	mutex_unlock(&ce->timeline->mutex);
>   
>   	GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */
> @@ -1627,6 +1628,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
>   		       const char *header, ...)
>   {
>   	struct i915_gpu_error * const error = &engine->i915->gpu_error;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq;
>   	intel_wakeref_t wakeref;
>   	unsigned long flags;
> @@ -1668,7 +1670,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
>   
>   	drm_printf(m, "\tRequests:\n");
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   	rq = intel_engine_find_active_request(engine);
>   	if (rq) {
>   		struct intel_timeline *tl = get_timeline(rq);
> @@ -1699,8 +1701,8 @@ void intel_engine_dump(struct intel_engine_cs *engine,
>   			hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
>   		}
>   	}
> -	drm_printf(m, "\tOn hold?: %lu\n", list_count(&engine->active.hold));
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	drm_printf(m, "\tOn hold?: %lu\n", list_count(&se->hold));
> +	spin_unlock_irqrestore(&se->lock, flags);
>   
>   	drm_printf(m, "\tMMIO base:  0x%08x\n", engine->mmio_base);
>   	wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm);
> @@ -1759,6 +1761,7 @@ static bool match_ring(struct i915_request *rq)
>   struct i915_request *
>   intel_engine_find_active_request(struct intel_engine_cs *engine)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *request, *active = NULL;
>   
>   	/*
> @@ -1772,7 +1775,7 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
>   	 * At all other times, we must assume the GPU is still running, but
>   	 * we only care about the snapshot of this moment.
>   	 */
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   
>   	rcu_read_lock();
>   	request = execlists_active(&engine->execlists);
> @@ -1790,7 +1793,7 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
>   	if (active)
>   		return active;
>   
> -	list_for_each_entry(request, &engine->active.requests, sched.link) {
> +	list_for_each_entry(request, &se->requests, sched.link) {
>   		if (__i915_request_is_complete(request))
>   			continue;
>   
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
> index 71ceaa5dcf40..e5637e831d28 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
> @@ -329,7 +329,7 @@ struct intel_engine_cs {
>   
>   	struct intel_sseu sseu;
>   
> -	struct {
> +	struct i915_sched {
>   		spinlock_t lock;
>   		struct list_head requests;
>   		struct list_head hold; /* ready requests, but on hold */
> @@ -621,5 +621,12 @@ intel_engine_has_relative_mmio(const struct intel_engine_cs * const engine)
>   	     (slice_) += ((subslice_) == 0)) \
>   		for_each_if((instdone_has_slice(dev_priv_, sseu_, slice_)) && \
>   			    (instdone_has_subslice(dev_priv_, sseu_, slice_, \
> -						    subslice_)))
> +						   subslice_)))
> +
> +static inline struct i915_sched *
> +intel_engine_get_scheduler(struct intel_engine_cs *engine)
> +{
> +	return &engine->active;
> +}
> +
>   #endif /* __INTEL_ENGINE_TYPES_H__ */
> diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> index b56e321ef003..280d84c4e4b7 100644
> --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> @@ -293,6 +293,7 @@ static int virtual_prio(const struct intel_engine_execlists *el)
>   static bool need_preempt(const struct intel_engine_cs *engine,
>   			 const struct i915_request *rq)
>   {
> +	const struct i915_sched *se = &engine->active;

There's only two instances in this patch which do not use 
intel_engine_get_scheduler. Intended?

Regards,

Tvrtko

>   	int last_prio;
>   
>   	if (!intel_engine_has_semaphores(engine))
> @@ -324,7 +325,7 @@ static bool need_preempt(const struct intel_engine_cs *engine,
>   	 * Check against the first request in ELSP[1], it will, thanks to the
>   	 * power of PI, be the highest priority of that context.
>   	 */
> -	if (!list_is_last(&rq->sched.link, &engine->active.requests) &&
> +	if (!list_is_last(&rq->sched.link, &se->requests) &&
>   	    rq_prio(list_next_entry(rq, sched.link)) > last_prio)
>   		return true;
>   
> @@ -476,15 +477,15 @@ static void execlists_schedule_in(struct i915_request *rq, int idx)
>   static void
>   resubmit_virtual_request(struct i915_request *rq, struct virtual_engine *ve)
>   {
> -	struct intel_engine_cs *engine = rq->engine;
> +	struct i915_sched *se = i915_request_get_scheduler(rq);
>   
> -	spin_lock_irq(&engine->active.lock);
> +	spin_lock_irq(&se->lock);
>   
>   	clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
>   	WRITE_ONCE(rq->engine, &ve->base);
>   	ve->base.submit_request(rq);
>   
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   }
>   
>   static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
> @@ -1018,6 +1019,8 @@ timeslice_yield(const struct intel_engine_execlists *el,
>   static bool needs_timeslice(const struct intel_engine_cs *engine,
>   			    const struct i915_request *rq)
>   {
> +	const struct i915_sched *se = &engine->active;
> +
>   	if (!intel_engine_has_timeslices(engine))
>   		return false;
>   
> @@ -1030,7 +1033,7 @@ static bool needs_timeslice(const struct intel_engine_cs *engine,
>   		return false;
>   
>   	/* If ELSP[1] is occupied, always check to see if worth slicing */
> -	if (!list_is_last_rcu(&rq->sched.link, &engine->active.requests)) {
> +	if (!list_is_last_rcu(&rq->sched.link, &se->requests)) {
>   		ENGINE_TRACE(engine, "timeslice required for second inflight context\n");
>   		return true;
>   	}
> @@ -1133,6 +1136,7 @@ static bool completed(const struct i915_request *rq)
>   static void execlists_dequeue(struct intel_engine_cs *engine)
>   {
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request **port = execlists->pending;
>   	struct i915_request ** const last_port = port + execlists->port_mask;
>   	struct i915_request *last, * const *active;
> @@ -1162,7 +1166,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
>   	 * and context switches) submission.
>   	 */
>   
> -	spin_lock(&engine->active.lock);
> +	spin_lock(&se->lock);
>   
>   	/*
>   	 * If the queue is higher priority than the last
> @@ -1262,7 +1266,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
>   				 * Even if ELSP[1] is occupied and not worthy
>   				 * of timeslices, our queue might be.
>   				 */
> -				spin_unlock(&engine->active.lock);
> +				spin_unlock(&se->lock);
>   				return;
>   			}
>   		}
> @@ -1288,7 +1292,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
>   
>   		if (last && !can_merge_rq(last, rq)) {
>   			spin_unlock(&ve->base.active.lock);
> -			spin_unlock(&engine->active.lock);
> +			spin_unlock(&se->lock);
>   			return; /* leave this for another sibling */
>   		}
>   
> @@ -1449,7 +1453,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
>   	 * interrupt for secondary ports).
>   	 */
>   	execlists->queue_priority_hint = queue_prio(execlists);
> -	spin_unlock(&engine->active.lock);
> +	spin_unlock(&se->lock);
>   
>   	/*
>   	 * We can skip poking the HW if we ended up with exactly the same set
> @@ -2614,6 +2618,7 @@ static void execlists_reset_csb(struct intel_engine_cs *engine, bool stalled)
>   
>   static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	unsigned long flags;
>   
>   	ENGINE_TRACE(engine, "\n");
> @@ -2623,9 +2628,9 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   
>   	/* Push back any incomplete requests for replay after the reset. */
>   	rcu_read_lock();
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   	__i915_sched_rewind_requests(engine);
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   	rcu_read_unlock();
>   }
>   
> @@ -2641,6 +2646,7 @@ static void nop_submission_tasklet(struct tasklet_struct *t)
>   static void execlists_reset_cancel(struct intel_engine_cs *engine)
>   {
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq, *rn;
>   	struct rb_node *rb;
>   	unsigned long flags;
> @@ -2664,10 +2670,10 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
>   	execlists_reset_csb(engine, true);
>   
>   	rcu_read_lock();
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* Mark all executing requests as skipped. */
> -	list_for_each_entry(rq, &engine->active.requests, sched.link)
> +	list_for_each_entry(rq, &se->requests, sched.link)
>   		i915_request_put(i915_request_mark_eio(rq));
>   	intel_engine_signal_breadcrumbs(engine);
>   
> @@ -2687,7 +2693,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
>   	}
>   
>   	/* On-hold requests will be flushed to timeline upon their release */
> -	list_for_each_entry(rq, &engine->active.hold, sched.link)
> +	list_for_each_entry(rq, &se->hold, sched.link)
>   		i915_request_put(i915_request_mark_eio(rq));
>   
>   	/* Cancel all attached virtual engines */
> @@ -2721,7 +2727,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
>   	GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
>   	execlists->tasklet.callback = nop_submission_tasklet;
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   	rcu_read_unlock();
>   }
>   
> @@ -2958,6 +2964,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
>   {
>   	struct virtual_engine *ve =
>   		container_of(wrk, typeof(*ve), rcu.work);
> +	struct i915_sched *se = intel_engine_get_scheduler(&ve->base);
>   	unsigned int n;
>   
>   	GEM_BUG_ON(ve->context.inflight);
> @@ -2966,7 +2973,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
>   	if (unlikely(ve->request)) {
>   		struct i915_request *old;
>   
> -		spin_lock_irq(&ve->base.active.lock);
> +		spin_lock_irq(&se->lock);
>   
>   		old = fetch_and_zero(&ve->request);
>   		if (old) {
> @@ -2975,7 +2982,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
>   			i915_request_put(old);
>   		}
>   
> -		spin_unlock_irq(&ve->base.active.lock);
> +		spin_unlock_irq(&se->lock);
>   	}
>   
>   	/*
> @@ -3161,6 +3168,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
>   
>   	for (n = 0; n < ve->num_siblings; n++) {
>   		struct intel_engine_cs *sibling = READ_ONCE(ve->siblings[n]);
> +		struct i915_sched *se = intel_engine_get_scheduler(sibling);
>   		struct ve_node * const node = &ve->nodes[sibling->id];
>   		struct rb_node **parent, *rb;
>   		bool first;
> @@ -3168,7 +3176,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
>   		if (!READ_ONCE(ve->request))
>   			break; /* already handled by a sibling's tasklet */
>   
> -		spin_lock_irq(&sibling->active.lock);
> +		spin_lock_irq(&se->lock);
>   
>   		if (unlikely(!(mask & sibling->mask))) {
>   			if (!RB_EMPTY_NODE(&node->rb)) {
> @@ -3221,7 +3229,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
>   			tasklet_hi_schedule(&sibling->execlists.tasklet);
>   
>   unlock_engine:
> -		spin_unlock_irq(&sibling->active.lock);
> +		spin_unlock_irq(&se->lock);
>   
>   		if (intel_context_inflight(&ve->context))
>   			break;
> @@ -3231,6 +3239,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
>   static void virtual_submit_request(struct i915_request *rq)
>   {
>   	struct virtual_engine *ve = to_virtual_engine(rq->engine);
> +	struct i915_sched *se = intel_engine_get_scheduler(&ve->base);
>   	unsigned long flags;
>   
>   	ENGINE_TRACE(&ve->base, "rq=%llx:%lld\n",
> @@ -3239,7 +3248,7 @@ static void virtual_submit_request(struct i915_request *rq)
>   
>   	GEM_BUG_ON(ve->base.submit_request != virtual_submit_request);
>   
> -	spin_lock_irqsave(&ve->base.active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* By the time we resubmit a request, it may be completed */
>   	if (__i915_request_is_complete(rq)) {
> @@ -3262,7 +3271,7 @@ static void virtual_submit_request(struct i915_request *rq)
>   	tasklet_hi_schedule(&ve->base.execlists.tasklet);
>   
>   unlock:
> -	spin_unlock_irqrestore(&ve->base.active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static struct ve_bond *
> @@ -3513,16 +3522,17 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
>   				   unsigned int max)
>   {
>   	const struct intel_engine_execlists *execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq, *last;
>   	unsigned long flags;
>   	unsigned int count;
>   	struct rb_node *rb;
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	last = NULL;
>   	count = 0;
> -	list_for_each_entry(rq, &engine->active.requests, sched.link) {
> +	list_for_each_entry(rq, &se->requests, sched.link) {
>   		if (count++ < max - 1)
>   			show_request(m, rq, "\t\t", 0);
>   		else
> @@ -3585,7 +3595,7 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
>   		show_request(m, last, "\t\t", 0);
>   	}
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
> diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> index 3cb2ce503544..8af1bc77e15e 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> @@ -322,14 +322,15 @@ static void reset_prepare(struct intel_engine_cs *engine)
>   
>   static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *pos, *rq;
>   	unsigned long flags;
>   	u32 head;
>   
>   	rq = NULL;
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   	rcu_read_lock();
> -	list_for_each_entry(pos, &engine->active.requests, sched.link) {
> +	list_for_each_entry(pos, &se->requests, sched.link) {
>   		if (!__i915_request_is_complete(pos)) {
>   			rq = pos;
>   			break;
> @@ -384,7 +385,7 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   	}
>   	engine->legacy.ring->head = intel_ring_wrap(engine->legacy.ring, head);
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void reset_finish(struct intel_engine_cs *engine)
> @@ -393,19 +394,20 @@ static void reset_finish(struct intel_engine_cs *engine)
>   
>   static void reset_cancel(struct intel_engine_cs *engine)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *request;
>   	unsigned long flags;
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* Mark all submitted requests as skipped. */
> -	list_for_each_entry(request, &engine->active.requests, sched.link)
> +	list_for_each_entry(request, &se->requests, sched.link)
>   		i915_request_put(i915_request_mark_eio(request));
>   	intel_engine_signal_breadcrumbs(engine);
>   
>   	/* Remaining _unready_ requests will be nop'ed when submitted */
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void i9xx_submit_request(struct i915_request *request)
> diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
> index cf1269e74998..b4d26d3bf39f 100644
> --- a/drivers/gpu/drm/i915/gt/mock_engine.c
> +++ b/drivers/gpu/drm/i915/gt/mock_engine.c
> @@ -230,15 +230,16 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
>   {
>   	struct mock_engine *mock =
>   		container_of(engine, typeof(*mock), base);
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq;
>   	unsigned long flags;
>   
>   	del_timer_sync(&mock->hw_delay);
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* Mark all submitted requests as skipped. */
> -	list_for_each_entry(rq, &engine->active.requests, sched.link)
> +	list_for_each_entry(rq, &se->requests, sched.link)
>   		i915_request_put(i915_request_mark_eio(rq));
>   	intel_engine_signal_breadcrumbs(engine);
>   
> @@ -251,7 +252,7 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
>   	}
>   	INIT_LIST_HEAD(&mock->hw_queue);
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void mock_reset_finish(struct intel_engine_cs *engine)
> diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c
> index 64f6a49a5c22..0395f9053a43 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_execlists.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c
> @@ -4548,6 +4548,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
>   	struct intel_context *ve;
>   	struct igt_spinner spin;
>   	struct i915_request *rq;
> +	struct i915_sched *se;
>   	unsigned int n;
>   	int err = 0;
>   
> @@ -4584,6 +4585,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
>   
>   	engine = rq->engine;
>   	GEM_BUG_ON(engine == ve->engine);
> +	se = intel_engine_get_scheduler(engine);
>   
>   	/* Take ownership of the reset and tasklet */
>   	local_bh_disable();
> @@ -4600,9 +4602,9 @@ static int reset_virtual_engine(struct intel_gt *gt,
>   	GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
>   
>   	/* Fake a preemption event; failed of course */
> -	spin_lock_irq(&engine->active.lock);
> +	spin_lock_irq(&se->lock);
>   	__i915_sched_rewind_requests(engine);
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   	GEM_BUG_ON(rq->engine != engine);
>   
>   	/* Reset the engine while keeping our active request on hold */
> 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 aecede4f0943..45f6d38341ef 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -181,6 +181,7 @@ static void schedule_out(struct i915_request *rq)
>   static void __guc_dequeue(struct intel_engine_cs *engine)
>   {
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request **first = execlists->inflight;
>   	struct i915_request ** const last_port = first + execlists->port_mask;
>   	struct i915_request *last = first[0];
> @@ -188,7 +189,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
>   	bool submit = false;
>   	struct rb_node *rb;
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   
>   	if (last) {
>   		if (*++first)
> @@ -241,11 +242,12 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
>   {
>   	struct intel_engine_cs * const engine =
>   		from_tasklet(engine, t, execlists.tasklet);
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
>   	struct i915_request **port, *rq;
>   	unsigned long flags;
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	for (port = execlists->inflight; (rq = *port); port++) {
>   		if (!i915_request_completed(rq))
> @@ -261,7 +263,7 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
>   
>   	__guc_dequeue(engine);
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void guc_reset_prepare(struct intel_engine_cs *engine)
> @@ -306,10 +308,11 @@ static void guc_reset_state(struct intel_context *ce,
>   
>   static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq;
>   	unsigned long flags;
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* Push back any incomplete requests for replay after the reset. */
>   	rq = __i915_sched_rewind_requests(engine);
> @@ -323,12 +326,13 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
>   	guc_reset_state(rq->context, engine, rq->head, stalled);
>   
>   out_unlock:
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void guc_reset_cancel(struct intel_engine_cs *engine)
>   {
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq, *rn;
>   	struct rb_node *rb;
>   	unsigned long flags;
> @@ -349,10 +353,10 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
>   	 * submission's irq state, we also wish to remind ourselves that
>   	 * it is irq state.)
>   	 */
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	/* Mark all executing requests as skipped. */
> -	list_for_each_entry(rq, &engine->active.requests, sched.link) {
> +	list_for_each_entry(rq, &se->requests, sched.link) {
>   		i915_request_set_error_once(rq, -EIO);
>   		i915_request_mark_complete(rq);
>   	}
> @@ -377,7 +381,7 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
>   	execlists->queue_priority_hint = INT_MIN;
>   	execlists->queue = RB_ROOT_CACHED;
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static void guc_reset_finish(struct intel_engine_cs *engine)
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
> index 0cb3686ed91d..f2e4f0232b87 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -1433,6 +1433,7 @@ static struct intel_engine_coredump *
>   capture_engine(struct intel_engine_cs *engine,
>   	       struct i915_vma_compress *compress)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_engine_capture_vma *capture = NULL;
>   	struct intel_engine_coredump *ee;
>   	struct i915_request *rq;
> @@ -1442,12 +1443,12 @@ capture_engine(struct intel_engine_cs *engine,
>   	if (!ee)
>   		return NULL;
>   
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   	rq = intel_engine_find_active_request(engine);
>   	if (rq)
>   		capture = intel_engine_coredump_add_request(ee, rq,
>   							    ATOMIC_MAYFAIL);
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   	if (!capture) {
>   		kfree(ee);
>   		return NULL;
> diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
> index 916e74fbab6c..947e4fad7cf0 100644
> --- a/drivers/gpu/drm/i915/i915_request.c
> +++ b/drivers/gpu/drm/i915/i915_request.c
> @@ -533,12 +533,12 @@ struct i915_request *i915_request_mark_eio(struct i915_request *rq)
>   bool __i915_request_submit(struct i915_request *request)
>   {
>   	struct intel_engine_cs *engine = request->engine;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	bool result = false;
>   
>   	RQ_TRACE(request, "\n");
>   
> -	GEM_BUG_ON(!irqs_disabled());
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   
>   	/*
>   	 * With the advent of preempt-to-busy, we frequently encounter
> @@ -595,7 +595,7 @@ bool __i915_request_submit(struct i915_request *request)
>   	result = true;
>   
>   	GEM_BUG_ON(test_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags));
> -	list_move_tail(&request->sched.link, &engine->active.requests);
> +	list_move_tail(&request->sched.link, &se->requests);
>   active:
>   	clear_bit(I915_FENCE_FLAG_PQUEUE, &request->fence.flags);
>   	set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags);
> @@ -621,30 +621,25 @@ bool __i915_request_submit(struct i915_request *request)
>   
>   void i915_request_submit(struct i915_request *request)
>   {
> -	struct intel_engine_cs *engine = request->engine;
> +	struct i915_sched *se = i915_request_get_scheduler(request);
>   	unsigned long flags;
>   
>   	/* Will be called from irq-context when using foreign fences. */
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	__i915_request_submit(request);
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   void __i915_request_unsubmit(struct i915_request *request)
>   {
> -	struct intel_engine_cs *engine = request->engine;
> -
>   	/*
>   	 * Only unwind in reverse order, required so that the per-context list
>   	 * is kept in seqno/ring order.
>   	 */
>   	RQ_TRACE(request, "\n");
>   
> -	GEM_BUG_ON(!irqs_disabled());
> -	lockdep_assert_held(&engine->active.lock);
> -
>   	/*
>   	 * Before we remove this breadcrumb from the signal list, we have
>   	 * to ensure that a concurrent dma_fence_enable_signaling() does not
> @@ -672,15 +667,15 @@ void __i915_request_unsubmit(struct i915_request *request)
>   
>   void i915_request_unsubmit(struct i915_request *request)
>   {
> -	struct intel_engine_cs *engine = request->engine;
> +	struct i915_sched *se = i915_request_get_scheduler(request);
>   	unsigned long flags;
>   
>   	/* Will be called from irq-context when using foreign fences. */
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   
>   	__i915_request_unsubmit(request);
>   
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   }
>   
>   static int __i915_sw_fence_call
> diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
> index 9ce074ffc1dd..e320edd718f3 100644
> --- a/drivers/gpu/drm/i915/i915_request.h
> +++ b/drivers/gpu/drm/i915/i915_request.h
> @@ -589,6 +589,12 @@ static inline void i915_request_clear_hold(struct i915_request *rq)
>   	clear_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags);
>   }
>   
> +static inline struct i915_sched *
> +i915_request_get_scheduler(const struct i915_request *rq)
> +{
> +	return intel_engine_get_scheduler(rq->engine);
> +}
> +
>   static inline struct intel_timeline *
>   i915_request_timeline(const struct i915_request *rq)
>   {
> @@ -613,7 +619,7 @@ i915_request_active_timeline(const struct i915_request *rq)
>   	 * this submission.
>   	 */
>   	return rcu_dereference_protected(rq->timeline,
> -					 lockdep_is_held(&rq->engine->active.lock));
> +					 lockdep_is_held(&i915_request_get_scheduler(rq)->lock));
>   }
>   
>   static inline bool i915_request_use_scheduler(const struct i915_request *rq)
> diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
> index 694ca3a3b563..663db3c36762 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler.c
> +++ b/drivers/gpu/drm/i915/i915_scheduler.c
> @@ -183,11 +183,12 @@ static struct list_head *
>   lookup_priolist(struct intel_engine_cs *engine, int prio)
>   {
>   	struct intel_engine_execlists * const execlists = &engine->execlists;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_priolist *p;
>   	struct rb_node **parent, *rb;
>   	bool first = true;
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   	assert_priolists(execlists);
>   
>   	if (unlikely(execlists->no_priolist))
> @@ -467,11 +468,12 @@ void __i915_sched_defer_request(struct intel_engine_cs *engine,
>   				struct i915_request *rq)
>   {
>   	struct list_head *pos = &rq->sched.waiters_list;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	const int prio = rq_prio(rq);
>   	struct i915_request *rn;
>   	LIST_HEAD(dfs);
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   	GEM_BUG_ON(!test_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags));
>   
>   	/*
> @@ -585,26 +587,27 @@ static bool hold_request(const struct i915_request *rq)
>   	return result;
>   }
>   
> -static bool ancestor_on_hold(const struct intel_engine_cs *engine,
> +static bool ancestor_on_hold(const struct i915_sched *se,
>   			     const struct i915_request *rq)
>   {
>   	GEM_BUG_ON(i915_request_on_hold(rq));
> -	return unlikely(!list_empty(&engine->active.hold)) && hold_request(rq);
> +	return unlikely(!list_empty(&se->hold)) && hold_request(rq);
>   }
>   
>   void i915_request_enqueue(struct i915_request *rq)
>   {
>   	struct intel_engine_cs *engine = rq->engine;
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	unsigned long flags;
>   	bool kick = false;
>   
>   	/* Will be called from irq-context when using foreign fences. */
> -	spin_lock_irqsave(&engine->active.lock, flags);
> +	spin_lock_irqsave(&se->lock, flags);
>   	GEM_BUG_ON(test_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags));
>   
> -	if (unlikely(ancestor_on_hold(engine, rq))) {
> +	if (unlikely(ancestor_on_hold(se, rq))) {
>   		RQ_TRACE(rq, "ancestor on hold\n");
> -		list_add_tail(&rq->sched.link, &engine->active.hold);
> +		list_add_tail(&rq->sched.link, &se->hold);
>   		i915_request_set_hold(rq);
>   	} else {
>   		queue_request(engine, rq);
> @@ -615,7 +618,7 @@ void i915_request_enqueue(struct i915_request *rq)
>   	}
>   
>   	GEM_BUG_ON(list_empty(&rq->sched.link));
> -	spin_unlock_irqrestore(&engine->active.lock, flags);
> +	spin_unlock_irqrestore(&se->lock, flags);
>   	if (kick)
>   		tasklet_hi_schedule(&engine->execlists.tasklet);
>   }
> @@ -623,15 +626,14 @@ void i915_request_enqueue(struct i915_request *rq)
>   struct i915_request *
>   __i915_sched_rewind_requests(struct intel_engine_cs *engine)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct i915_request *rq, *rn, *active = NULL;
>   	struct list_head *pl;
>   	int prio = I915_PRIORITY_INVALID;
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   
> -	list_for_each_entry_safe_reverse(rq, rn,
> -					 &engine->active.requests,
> -					 sched.link) {
> +	list_for_each_entry_safe_reverse(rq, rn, &se->requests, sched.link) {
>   		if (__i915_request_is_complete(rq)) {
>   			list_del_init(&rq->sched.link);
>   			continue;
> @@ -664,9 +666,10 @@ __i915_sched_rewind_requests(struct intel_engine_cs *engine)
>   bool __i915_sched_suspend_request(struct intel_engine_cs *engine,
>   				  struct i915_request *rq)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	LIST_HEAD(list);
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   	GEM_BUG_ON(rq->engine != engine);
>   
>   	if (__i915_request_is_complete(rq)) /* too late! */
> @@ -690,7 +693,7 @@ bool __i915_sched_suspend_request(struct intel_engine_cs *engine,
>   		if (i915_request_is_active(rq))
>   			__i915_request_unsubmit(rq);
>   
> -		list_move_tail(&rq->sched.link, &engine->active.hold);
> +		list_move_tail(&rq->sched.link, &se->hold);
>   		clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
>   		i915_request_set_hold(rq);
>   		RQ_TRACE(rq, "on hold\n");
> @@ -721,7 +724,7 @@ bool __i915_sched_suspend_request(struct intel_engine_cs *engine,
>   		rq = list_first_entry_or_null(&list, typeof(*rq), sched.link);
>   	} while (rq);
>   
> -	GEM_BUG_ON(list_empty(&engine->active.hold));
> +	GEM_BUG_ON(list_empty(&se->hold));
>   
>   	return true;
>   }
> @@ -729,14 +732,15 @@ bool __i915_sched_suspend_request(struct intel_engine_cs *engine,
>   bool i915_sched_suspend_request(struct intel_engine_cs *engine,
>   				struct i915_request *rq)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	bool result;
>   
>   	if (i915_request_on_hold(rq))
>   		return false;
>   
> -	spin_lock_irq(&engine->active.lock);
> +	spin_lock_irq(&se->lock);
>   	result = __i915_sched_suspend_request(engine, rq);
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   
>   	return result;
>   }
> @@ -744,9 +748,10 @@ bool i915_sched_suspend_request(struct intel_engine_cs *engine,
>   void __i915_sched_resume_request(struct intel_engine_cs *engine,
>   				 struct i915_request *rq)
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	LIST_HEAD(list);
>   
> -	lockdep_assert_held(&engine->active.lock);
> +	lockdep_assert_held(&se->lock);
>   
>   	if (rq_prio(rq) > engine->execlists.queue_priority_hint) {
>   		engine->execlists.queue_priority_hint = rq_prio(rq);
> @@ -809,9 +814,11 @@ void __i915_sched_resume_request(struct intel_engine_cs *engine,
>   void i915_sched_resume_request(struct intel_engine_cs *engine,
>   			       struct i915_request *rq)
>   {
> -	spin_lock_irq(&engine->active.lock);
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
> +
> +	spin_lock_irq(&se->lock);
>   	__i915_sched_resume_request(engine, rq);
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   }
>   
>   void i915_sched_node_init(struct i915_sched_node *node)
> diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
> index 28138c3fcc81..f2b0ac3a05a5 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler_types.h
> +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
> @@ -68,12 +68,12 @@ struct i915_sched_node {
>   
>   	struct list_head signalers_list; /* those before us, we depend upon */
>   	struct list_head waiters_list; /* those after us, they depend upon us */
> -	struct list_head link; /* guarded by engine->active.lock */
> +	struct list_head link; /* guarded by i915_sched.lock */
>   	struct i915_sched_stack {
>   		/* Branch memoization used during depth-first search */
>   		struct i915_request *prev;
>   		struct list_head *pos;
> -	} dfs; /* guarded by engine->active.lock */
> +	} dfs; /* guarded by i915_sched.lock */
>   	struct i915_sched_attr attr;
>   	unsigned long flags;
>   #define I915_SCHED_HAS_EXTERNAL_CHAIN	BIT(0)
> diff --git a/drivers/gpu/drm/i915/selftests/i915_scheduler.c b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
> index acc666f755d7..35a479184fee 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_scheduler.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
> @@ -77,7 +77,8 @@ static int all_engines(struct drm_i915_private *i915,
>   	return 0;
>   }
>   
> -static bool check_context_order(struct intel_engine_cs *engine)
> +static bool check_context_order(struct i915_sched *se,
> +				struct intel_engine_cs *engine)
>   {
>   	u64 last_seqno, last_context;
>   	unsigned long count;
> @@ -86,7 +87,7 @@ static bool check_context_order(struct intel_engine_cs *engine)
>   	int last_prio;
>   
>   	/* We expect the execution order to follow ascending fence-context */
> -	spin_lock_irq(&engine->active.lock);
> +	spin_lock_irq(&se->lock);
>   
>   	count = 0;
>   	last_context = 0;
> @@ -119,7 +120,7 @@ static bool check_context_order(struct intel_engine_cs *engine)
>   	}
>   	result = true;
>   out_unlock:
> -	spin_unlock_irq(&engine->active.lock);
> +	spin_unlock_irq(&se->lock);
>   
>   	return result;
>   }
> @@ -128,6 +129,7 @@ static int __single_chain(struct intel_engine_cs *engine, unsigned long length,
>   			  bool (*fn)(struct i915_request *rq,
>   				     unsigned long v, unsigned long e))
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_context *ce;
>   	struct igt_spinner spin;
>   	struct i915_request *rq;
> @@ -173,7 +175,7 @@ static int __single_chain(struct intel_engine_cs *engine, unsigned long length,
>   	intel_engine_flush_submission(engine);
>   
>   	execlists_active_lock_bh(&engine->execlists);
> -	if (fn(rq, count, count - 1) && !check_context_order(engine))
> +	if (fn(rq, count, count - 1) && !check_context_order(se, engine))
>   		err = -EINVAL;
>   	execlists_active_unlock_bh(&engine->execlists);
>   
> @@ -191,6 +193,7 @@ static int __wide_chain(struct intel_engine_cs *engine, unsigned long width,
>   			bool (*fn)(struct i915_request *rq,
>   				   unsigned long v, unsigned long e))
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_context **ce;
>   	struct i915_request **rq;
>   	struct igt_spinner spin;
> @@ -257,7 +260,7 @@ static int __wide_chain(struct intel_engine_cs *engine, unsigned long width,
>   	intel_engine_flush_submission(engine);
>   
>   	execlists_active_lock_bh(&engine->execlists);
> -	if (fn(rq[i - 1], i, count) && !check_context_order(engine))
> +	if (fn(rq[i - 1], i, count) && !check_context_order(se, engine))
>   		err = -EINVAL;
>   	execlists_active_unlock_bh(&engine->execlists);
>   
> @@ -279,6 +282,7 @@ static int __inv_chain(struct intel_engine_cs *engine, unsigned long width,
>   		       bool (*fn)(struct i915_request *rq,
>   				  unsigned long v, unsigned long e))
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_context **ce;
>   	struct i915_request **rq;
>   	struct igt_spinner spin;
> @@ -345,7 +349,7 @@ static int __inv_chain(struct intel_engine_cs *engine, unsigned long width,
>   	intel_engine_flush_submission(engine);
>   
>   	execlists_active_lock_bh(&engine->execlists);
> -	if (fn(rq[i - 1], i, count) && !check_context_order(engine))
> +	if (fn(rq[i - 1], i, count) && !check_context_order(se, engine))
>   		err = -EINVAL;
>   	execlists_active_unlock_bh(&engine->execlists);
>   
> @@ -367,6 +371,7 @@ static int __sparse_chain(struct intel_engine_cs *engine, unsigned long width,
>   			  bool (*fn)(struct i915_request *rq,
>   				     unsigned long v, unsigned long e))
>   {
> +	struct i915_sched *se = intel_engine_get_scheduler(engine);
>   	struct intel_context **ce;
>   	struct i915_request **rq;
>   	struct igt_spinner spin;
> @@ -450,7 +455,7 @@ static int __sparse_chain(struct intel_engine_cs *engine, unsigned long width,
>   	intel_engine_flush_submission(engine);
>   
>   	execlists_active_lock_bh(&engine->execlists);
> -	if (fn(rq[i - 1], i, count) && !check_context_order(engine))
> +	if (fn(rq[i - 1], i, count) && !check_context_order(se, engine))
>   		err = -EINVAL;
>   	execlists_active_unlock_bh(&engine->execlists);
>   
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