Add wrapper function around RB tree to determine if i915_sched_engine is empty.

Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Jason Ekstrand jason@jlekstrand.net --- drivers/gpu/drm/i915/gt/intel_engine_cs.c | 2 +- drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 6 +++--- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 +- drivers/gpu/drm/i915/i915_scheduler.h | 6 ++++++ 4 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 4772ed1a1f3a..aeaf5c6f94b2 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -1296,7 +1296,7 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine) intel_engine_flush_submission(engine);

/* ELSP is empty, but there are ready requests? E.g. after reset */ - if (!RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)) + if (!i915_sched_engine_is_empty(engine->sched_engine)) return false;

/* Ring stopped? */ diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index 4f759559a792..e36b0e81876a 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -384,7 +384,7 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine) prio = rq_prio(rq); pl = i915_sched_lookup_priolist(engine, prio); } - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));

list_move(&rq->sched.link, pl); set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); @@ -1139,7 +1139,7 @@ static bool needs_timeslice(const struct intel_engine_cs *engine, }

/* Otherwise, ELSP[0] is by itself, but may be waiting in the queue */ - if (!RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)) { + if (!i915_sched_engine_is_empty(engine->sched_engine)) { ENGINE_TRACE(engine, "timeslice required for queue\n"); return true; } @@ -2487,7 +2487,7 @@ static void execlists_submit_request(struct i915_request *request) } else { queue_request(engine, request);

- GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine)); GEM_BUG_ON(list_empty(&request->sched.link));

if (submit_queue(engine, request)) 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 5c5f33f40055..d65a7665b38e 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -515,7 +515,7 @@ static void guc_submit_request(struct i915_request *rq)

queue_request(engine, rq, rq_prio(rq));

- GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine)); GEM_BUG_ON(list_empty(&rq->sched.link));

tasklet_hi_schedule(&engine->execlists.tasklet); diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h index 91a04e34cac5..5bec7b3b8456 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.h +++ b/drivers/gpu/drm/i915/i915_scheduler.h @@ -66,6 +66,12 @@ i915_sched_engine_put(struct i915_sched_engine *sched_engine) kref_put(&sched_engine->ref, i915_sched_engine_free); }

+static inline bool +i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine) +{ + return RB_EMPTY_ROOT(&sched_engine->queue.rb_root); +} + void i915_request_show_with_schedule(struct drm_printer *m, const struct i915_request *rq, const char *prefix,

Move active request tracking and its lock to i915_sched_engine. This lock is also the submission lock so having it in the i915_sched_engine is the correct place.

v3: (Jason Ekstrand) Add kernel doc v6: Rebase

Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.comk --- drivers/gpu/drm/i915/gt/intel_engine.h | 2 - drivers/gpu/drm/i915/gt/intel_engine_cs.c | 43 +++----- drivers/gpu/drm/i915/gt/intel_engine_types.h | 6 -- .../drm/i915/gt/intel_execlists_submission.c | 98 ++++++++++--------- .../gpu/drm/i915/gt/intel_ring_submission.c | 12 +-- drivers/gpu/drm/i915/gt/mock_engine.c | 7 +- drivers/gpu/drm/i915/gt/selftest_execlists.c | 4 +- .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 20 ++-- drivers/gpu/drm/i915/i915_gpu_error.c | 4 +- drivers/gpu/drm/i915/i915_request.c | 32 +++--- drivers/gpu/drm/i915/i915_request.h | 2 +- drivers/gpu/drm/i915/i915_scheduler.c | 30 ++++-- drivers/gpu/drm/i915/i915_scheduler_types.h | 16 +++ 13 files changed, 140 insertions(+), 136 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h index 62f7440bc111..45ee08fc40a1 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine.h +++ b/drivers/gpu/drm/i915/gt/intel_engine.h @@ -269,8 +269,6 @@ intel_engine_create_pinned_context(struct intel_engine_cs *engine,

void intel_engine_destroy_pinned_context(struct intel_context *ce);

-void intel_engine_init_active(struct intel_engine_cs *engine, - unsigned int subclass); #define ENGINE_PHYSICAL 0 #define ENGINE_MOCK 1 #define ENGINE_VIRTUAL 2 diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index aeaf5c6f94b2..b7efc4e399c5 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -721,7 +721,6 @@ static int engine_setup_common(struct intel_engine_cs *engine) if (err) goto err_cmd_parser;

- intel_engine_init_active(engine, ENGINE_PHYSICAL); intel_engine_init_execlists(engine); intel_engine_init__pm(engine); intel_engine_init_retire(engine); @@ -780,11 +779,11 @@ 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(&engine->sched_engine->lock);

dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs;

- spin_unlock_irq(&engine->active.lock); + spin_unlock_irq(&engine->sched_engine->lock); mutex_unlock(&ce->timeline->mutex);

GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */ @@ -793,28 +792,6 @@ static int measure_breadcrumb_dw(struct intel_context *ce) return dw; }

-void -intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass) -{ - INIT_LIST_HEAD(&engine->active.requests); - INIT_LIST_HEAD(&engine->active.hold); - - spin_lock_init(&engine->active.lock); - lockdep_set_subclass(&engine->active.lock, subclass); - - /* - * Due to an interesting quirk in lockdep's internal debug tracking, - * after setting a subclass we must ensure the lock is used. Otherwise, - * nr_unused_locks is incremented once too often. - */ -#ifdef CONFIG_DEBUG_LOCK_ALLOC - local_irq_disable(); - lock_map_acquire(&engine->active.lock.dep_map); - lock_map_release(&engine->active.lock.dep_map); - local_irq_enable(); -#endif -} - struct intel_context * intel_engine_create_pinned_context(struct intel_engine_cs *engine, struct i915_address_space *vm, @@ -969,7 +946,7 @@ int intel_engines_init(struct intel_gt *gt) */ void intel_engine_cleanup_common(struct intel_engine_cs *engine) { - GEM_BUG_ON(!list_empty(&engine->active.requests)); + GEM_BUG_ON(!list_empty(&engine->sched_engine->requests)); tasklet_kill(&engine->execlists.tasklet); /* flush the callback */

i915_sched_engine_put(engine->sched_engine); @@ -1362,7 +1339,7 @@ static struct intel_timeline *get_timeline(struct i915_request *rq) struct intel_timeline *tl;

/* - * Even though we are holding the engine->active.lock here, there + * Even though we are holding the engine->sched_engine->lock here, there * is no control over the submission queue per-se and we are * inspecting the active state at a random point in time, with an * unknown queue. Play safe and make sure the timeline remains valid. @@ -1709,7 +1686,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,

drm_printf(m, "\tRequests:\n");

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags); rq = intel_engine_find_active_request(engine); if (rq) { struct intel_timeline *tl = get_timeline(rq); @@ -1740,8 +1717,9 @@ 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(&engine->sched_engine->hold)); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);

drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base); wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm); @@ -1821,7 +1799,7 @@ 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(&engine->sched_engine->lock);

rcu_read_lock(); request = execlists_active(&engine->execlists); @@ -1839,7 +1817,8 @@ 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, &engine->sched_engine->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 e41a9c3f9269..5e0f39d202ef 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h @@ -304,12 +304,6 @@ struct intel_engine_cs {

struct intel_sseu sseu;

- struct { - spinlock_t lock; - struct list_head requests; - struct list_head hold; /* ready requests, but on hold */ - } active; - struct i915_sched_engine *sched_engine;

/* keep a request in reserve for a [pm] barrier under oom */ diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index 47a43aafa39f..0591698573e8 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -325,7 +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, &engine->sched_engine->requests) && rq_prio(list_next_entry(rq, sched.link)) > last_prio) return true;

@@ -367,10 +367,10 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine) struct list_head *pl; int prio = I915_PRIORITY_INVALID;

- lockdep_assert_held(&engine->active.lock); + lockdep_assert_held(&engine->sched_engine->lock);

list_for_each_entry_safe_reverse(rq, rn, - &engine->active.requests, + &engine->sched_engine->requests, sched.link) { if (__i915_request_is_complete(rq)) { list_del_init(&rq->sched.link); @@ -534,13 +534,13 @@ resubmit_virtual_request(struct i915_request *rq, struct virtual_engine *ve) { struct intel_engine_cs *engine = rq->engine;

- spin_lock_irq(&engine->active.lock); + spin_lock_irq(&engine->sched_engine->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(&engine->sched_engine->lock); }

static void kick_siblings(struct i915_request *rq, struct intel_context *ce) @@ -579,7 +579,7 @@ static void __execlists_schedule_out(struct i915_request * const rq, unsigned int ccid;

/* - * NB process_csb() is not under the engine->active.lock and hence + * NB process_csb() is not under the engine->sched_engine->lock and hence * schedule_out can race with schedule_in meaning that we should * refrain from doing non-trivial work here. */ @@ -1133,7 +1133,8 @@ 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, + &engine->sched_engine->requests)) { ENGINE_TRACE(engine, "timeslice required for second inflight context\n"); return true; } @@ -1266,7 +1267,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) * and context switches) submission. */

- spin_lock(&engine->active.lock); + spin_lock(&sched_engine->lock);

/* * If the queue is higher priority than the last @@ -1366,7 +1367,7 @@ 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(&sched_engine->lock); return; } } @@ -1376,7 +1377,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) while ((ve = first_virtual_engine(engine))) { struct i915_request *rq;

- spin_lock(&ve->base.active.lock); + spin_lock(&ve->base.sched_engine->lock);

rq = ve->request; if (unlikely(!virtual_matches(ve, rq, engine))) @@ -1386,13 +1387,13 @@ static void execlists_dequeue(struct intel_engine_cs *engine) GEM_BUG_ON(rq->context != &ve->context);

if (unlikely(rq_prio(rq) < queue_prio(sched_engine))) { - spin_unlock(&ve->base.active.lock); + spin_unlock(&ve->base.sched_engine->lock); break; }

if (last && !can_merge_rq(last, rq)) { - spin_unlock(&ve->base.active.lock); - spin_unlock(&engine->active.lock); + spin_unlock(&ve->base.sched_engine->lock); + spin_unlock(&engine->sched_engine->lock); return; /* leave this for another sibling */ }

@@ -1438,7 +1439,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)

i915_request_put(rq); unlock: - spin_unlock(&ve->base.active.lock); + spin_unlock(&ve->base.sched_engine->lock);

/* * Hmm, we have a bunch of virtual engine requests, @@ -1554,7 +1555,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) */ sched_engine->queue_priority_hint = queue_prio(sched_engine); i915_sched_engine_reset_on_empty(sched_engine); - spin_unlock(&engine->active.lock); + spin_unlock(&sched_engine->lock);

/* * We can skip poking the HW if we ended up with exactly the same set @@ -1981,7 +1982,8 @@ static void __execlists_hold(struct i915_request *rq) __i915_request_unsubmit(rq);

clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); - list_move_tail(&rq->sched.link, &rq->engine->active.hold); + list_move_tail(&rq->sched.link, + &rq->engine->sched_engine->hold); i915_request_set_hold(rq); RQ_TRACE(rq, "on hold\n");

@@ -2018,7 +2020,7 @@ static bool execlists_hold(struct intel_engine_cs *engine, if (i915_request_on_hold(rq)) return false;

- spin_lock_irq(&engine->active.lock); + spin_lock_irq(&engine->sched_engine->lock);

if (__i915_request_is_complete(rq)) { /* too late! */ rq = NULL; @@ -2034,10 +2036,10 @@ static bool execlists_hold(struct intel_engine_cs *engine, GEM_BUG_ON(i915_request_on_hold(rq)); GEM_BUG_ON(rq->engine != engine); __execlists_hold(rq); - GEM_BUG_ON(list_empty(&engine->active.hold)); + GEM_BUG_ON(list_empty(&engine->sched_engine->hold));

unlock: - spin_unlock_irq(&engine->active.lock); + spin_unlock_irq(&engine->sched_engine->lock); return rq; }

@@ -2117,7 +2119,7 @@ static void __execlists_unhold(struct i915_request *rq) static void execlists_unhold(struct intel_engine_cs *engine, struct i915_request *rq) { - spin_lock_irq(&engine->active.lock); + spin_lock_irq(&engine->sched_engine->lock);

/* * Move this request back to the priority queue, and all of its @@ -2130,7 +2132,7 @@ static void execlists_unhold(struct intel_engine_cs *engine, tasklet_hi_schedule(&engine->execlists.tasklet); }

- spin_unlock_irq(&engine->active.lock); + spin_unlock_irq(&engine->sched_engine->lock); }

struct execlists_capture { @@ -2260,13 +2262,13 @@ static void execlists_capture(struct intel_engine_cs *engine) if (!cap) return;

- spin_lock_irq(&engine->active.lock); + spin_lock_irq(&engine->sched_engine->lock); cap->rq = active_context(engine, active_ccid(engine)); if (cap->rq) { cap->rq = active_request(cap->rq->context->timeline, cap->rq); cap->rq = i915_request_get_rcu(cap->rq); } - spin_unlock_irq(&engine->active.lock); + spin_unlock_irq(&engine->sched_engine->lock); if (!cap->rq) goto err_free;

@@ -2470,7 +2472,7 @@ static bool ancestor_on_hold(const struct intel_engine_cs *engine, const struct i915_request *rq) { GEM_BUG_ON(i915_request_on_hold(rq)); - return !list_empty(&engine->active.hold) && hold_request(rq); + return !list_empty(&engine->sched_engine->hold) && hold_request(rq); }

static void execlists_submit_request(struct i915_request *request) @@ -2479,11 +2481,12 @@ static void execlists_submit_request(struct i915_request *request) unsigned long flags;

/* Will be called from irq-context when using foreign fences. */ - spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

if (unlikely(ancestor_on_hold(engine, request))) { RQ_TRACE(request, "ancestor on hold\n"); - list_add_tail(&request->sched.link, &engine->active.hold); + list_add_tail(&request->sched.link, + &engine->sched_engine->hold); i915_request_set_hold(request); } else { queue_request(engine, request); @@ -2495,7 +2498,7 @@ static void execlists_submit_request(struct i915_request *request) __execlists_kick(&engine->execlists); }

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); }

static int @@ -2959,9 +2962,9 @@ 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(&engine->sched_engine->lock, flags); __unwind_incomplete_requests(engine); - spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); rcu_read_unlock(); }

@@ -3001,10 +3004,10 @@ 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(&engine->sched_engine->lock, flags);

/* Mark all executing requests as skipped. */ - list_for_each_entry(rq, &engine->active.requests, sched.link) + list_for_each_entry(rq, &engine->sched_engine->requests, sched.link) i915_request_put(i915_request_mark_eio(rq)); intel_engine_signal_breadcrumbs(engine);

@@ -3024,7 +3027,7 @@ 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, &sched_engine->hold, sched.link) i915_request_put(i915_request_mark_eio(rq));

/* Cancel all attached virtual engines */ @@ -3035,7 +3038,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) rb_erase_cached(rb, &execlists->virtual); RB_CLEAR_NODE(rb);

- spin_lock(&ve->base.active.lock); + spin_lock(&ve->base.sched_engine->lock); rq = fetch_and_zero(&ve->request); if (rq) { if (i915_request_mark_eio(rq)) { @@ -3047,7 +3050,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)

ve->base.sched_engine->queue_priority_hint = INT_MIN; } - spin_unlock(&ve->base.active.lock); + spin_unlock(&ve->base.sched_engine->lock); }

/* Remaining _unready_ requests will be nop'ed when submitted */ @@ -3058,7 +3061,7 @@ 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(&engine->sched_engine->lock, flags); rcu_read_unlock(); }

@@ -3304,7 +3307,7 @@ 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(&ve->base.sched_engine->lock);

old = fetch_and_zero(&ve->request); if (old) { @@ -3313,7 +3316,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk) i915_request_put(old); }

- spin_unlock_irq(&ve->base.active.lock); + spin_unlock_irq(&ve->base.sched_engine->lock); }

/* @@ -3333,13 +3336,13 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk) if (RB_EMPTY_NODE(node)) continue;

- spin_lock_irq(&sibling->active.lock); + spin_lock_irq(&sibling->sched_engine->lock);

/* Detachment is lazily performed in the execlists tasklet */ if (!RB_EMPTY_NODE(node)) rb_erase_cached(node, &sibling->execlists.virtual);

- spin_unlock_irq(&sibling->active.lock); + spin_unlock_irq(&sibling->sched_engine->lock); } GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet)); GEM_BUG_ON(!list_empty(virtual_queue(ve))); @@ -3509,7 +3512,7 @@ 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(&sibling->sched_engine->lock);

if (unlikely(!(mask & sibling->mask))) { if (!RB_EMPTY_NODE(&node->rb)) { @@ -3562,7 +3565,7 @@ 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(&sibling->sched_engine->lock);

if (intel_context_inflight(&ve->context)) break; @@ -3580,7 +3583,7 @@ 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(&ve->base.sched_engine->lock, flags);

/* By the time we resubmit a request, it may be completed */ if (__i915_request_is_complete(rq)) { @@ -3603,7 +3606,7 @@ 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(&ve->base.sched_engine->lock, flags); }

static struct ve_bond * @@ -3687,7 +3690,6 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,

snprintf(ve->base.name, sizeof(ve->base.name), "virtual");

- intel_engine_init_active(&ve->base, ENGINE_VIRTUAL); intel_engine_init_execlists(&ve->base);

ve->base.sched_engine = i915_sched_engine_create(ENGINE_VIRTUAL); @@ -3860,17 +3862,17 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine, unsigned int max) { const struct intel_engine_execlists *execlists = &engine->execlists; - const struct i915_sched_engine *sched_engine = engine->sched_engine; + struct i915_sched_engine *sched_engine = engine->sched_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(&sched_engine->lock, flags);

last = NULL; count = 0; - list_for_each_entry(rq, &engine->active.requests, sched.link) { + list_for_each_entry(rq, &sched_engine->requests, sched.link) { if (count++ < max - 1) show_request(m, rq, "\t\t", 0); else @@ -3933,7 +3935,7 @@ 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(&sched_engine->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 0c423f096e2b..5d42a12ef3d6 100644 --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c @@ -339,9 +339,9 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled) u32 head;

rq = NULL; - spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags); rcu_read_lock(); - list_for_each_entry(pos, &engine->active.requests, sched.link) { + list_for_each_entry(pos, &engine->sched_engine->requests, sched.link) { if (!__i915_request_is_complete(pos)) { rq = pos; break; @@ -396,7 +396,7 @@ 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(&engine->sched_engine->lock, flags); }

static void reset_finish(struct intel_engine_cs *engine) @@ -408,16 +408,16 @@ static void reset_cancel(struct intel_engine_cs *engine) struct i915_request *request; unsigned long flags;

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

/* Mark all submitted requests as skipped. */ - list_for_each_entry(request, &engine->active.requests, sched.link) + list_for_each_entry(request, &engine->sched_engine->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(&engine->sched_engine->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 b1fdba13e900..a49fd3039f13 100644 --- a/drivers/gpu/drm/i915/gt/mock_engine.c +++ b/drivers/gpu/drm/i915/gt/mock_engine.c @@ -253,10 +253,10 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)

del_timer_sync(&mock->hw_delay);

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

/* Mark all submitted requests as skipped. */ - list_for_each_entry(rq, &engine->active.requests, sched.link) + list_for_each_entry(rq, &engine->sched_engine->requests, sched.link) i915_request_put(i915_request_mark_eio(rq)); intel_engine_signal_breadcrumbs(engine);

@@ -269,7 +269,7 @@ 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(&engine->sched_engine->lock, flags); }

static void mock_reset_finish(struct intel_engine_cs *engine) @@ -350,7 +350,6 @@ int mock_engine_init(struct intel_engine_cs *engine) if (!engine->sched_engine) return -ENOMEM;

- intel_engine_init_active(engine, ENGINE_MOCK); intel_engine_init_execlists(engine); intel_engine_init__pm(engine); intel_engine_init_retire(engine); diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c index 1c8108d30b85..da694bad4683 100644 --- a/drivers/gpu/drm/i915/gt/selftest_execlists.c +++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c @@ -4610,9 +4610,9 @@ 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(&engine->sched_engine->lock); __unwind_incomplete_requests(engine); - spin_unlock_irq(&engine->active.lock); + spin_unlock_irq(&engine->sched_engine->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 9887a514a4d5..6b8f6544d91a 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -190,7 +190,7 @@ 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(&sched_engine->lock);

if (last) { if (*++first) @@ -247,7 +247,7 @@ static void guc_submission_tasklet(struct tasklet_struct *t) struct i915_request **port, *rq; unsigned long flags;

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

for (port = execlists->inflight; (rq = *port); port++) { if (!i915_request_completed(rq)) @@ -265,7 +265,7 @@ static void guc_submission_tasklet(struct tasklet_struct *t)

i915_sched_engine_reset_on_empty(engine->sched_engine);

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); }

static void cs_irq_handler(struct intel_engine_cs *engine, u16 iir) @@ -322,7 +322,7 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled) struct i915_request *rq; unsigned long flags;

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

/* Push back any incomplete requests for replay after the reset. */ rq = execlists_unwind_incomplete_requests(execlists); @@ -336,7 +336,7 @@ 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(&engine->sched_engine->lock, flags); }

static void guc_reset_cancel(struct intel_engine_cs *engine) @@ -362,10 +362,10 @@ 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(&sched_engine->lock, flags);

/* Mark all executing requests as skipped. */ - list_for_each_entry(rq, &engine->active.requests, sched.link) { + list_for_each_entry(rq, &sched_engine->requests, sched.link) { i915_request_set_error_once(rq, -EIO); i915_request_mark_complete(rq); } @@ -390,7 +390,7 @@ static void guc_reset_cancel(struct intel_engine_cs *engine) sched_engine->queue_priority_hint = INT_MIN; sched_engine->queue = RB_ROOT_CACHED;

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&sched_engine->lock, flags); }

static void guc_reset_finish(struct intel_engine_cs *engine) @@ -513,7 +513,7 @@ static void guc_submit_request(struct i915_request *rq) unsigned long flags;

/* Will be called from irq-context when using foreign fences. */ - spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

queue_request(engine, rq, rq_prio(rq));

@@ -522,7 +522,7 @@ static void guc_submit_request(struct i915_request *rq)

tasklet_hi_schedule(&engine->execlists.tasklet);

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); }

static void sanitize_hwsp(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 35c97c39f125..cb182c6d265a 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1436,12 +1436,12 @@ capture_engine(struct intel_engine_cs *engine, if (!ee) return NULL;

- spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->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(&engine->sched_engine->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 1014c71cf7f5..bd58198735dc 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -272,11 +272,11 @@ i915_request_active_engine(struct i915_request *rq, * check that we have acquired the lock on the final engine. */ locked = READ_ONCE(rq->engine); - spin_lock_irq(&locked->active.lock); + spin_lock_irq(&locked->sched_engine->lock); while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) { - spin_unlock(&locked->active.lock); + spin_unlock(&locked->sched_engine->lock); locked = engine; - spin_lock(&locked->active.lock); + spin_lock(&locked->sched_engine->lock); }

if (i915_request_is_active(rq)) { @@ -285,7 +285,7 @@ i915_request_active_engine(struct i915_request *rq, ret = true; }

- spin_unlock_irq(&locked->active.lock); + spin_unlock_irq(&locked->sched_engine->lock);

return ret; } @@ -302,10 +302,10 @@ static void remove_from_engine(struct i915_request *rq) * check that the rq still belongs to the newly locked engine. */ locked = READ_ONCE(rq->engine); - spin_lock_irq(&locked->active.lock); + spin_lock_irq(&locked->sched_engine->lock); while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) { - spin_unlock(&locked->active.lock); - spin_lock(&engine->active.lock); + spin_unlock(&locked->sched_engine->lock); + spin_lock(&engine->sched_engine->lock); locked = engine; } list_del_init(&rq->sched.link); @@ -316,7 +316,7 @@ static void remove_from_engine(struct i915_request *rq) /* Prevent further __await_execution() registering a cb, then flush */ set_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags);

- spin_unlock_irq(&locked->active.lock); + spin_unlock_irq(&locked->sched_engine->lock);

__notify_execute_cb_imm(rq); } @@ -637,7 +637,7 @@ bool __i915_request_submit(struct i915_request *request) RQ_TRACE(request, "\n");

GEM_BUG_ON(!irqs_disabled()); - lockdep_assert_held(&engine->active.lock); + lockdep_assert_held(&engine->sched_engine->lock);

/* * With the advent of preempt-to-busy, we frequently encounter @@ -649,7 +649,7 @@ bool __i915_request_submit(struct i915_request *request) * * We must remove the request from the caller's priority queue, * and the caller must only call us when the request is in their - * priority queue, under the active.lock. This ensures that the + * priority queue, under the sched_engine->lock. This ensures that the * request has *not* yet been retired and we can safely move * the request into the engine->active.list where it will be * dropped upon retiring. (Otherwise if resubmit a *retired* @@ -694,7 +694,7 @@ 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, &engine->sched_engine->requests); active: clear_bit(I915_FENCE_FLAG_PQUEUE, &request->fence.flags); set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags); @@ -724,11 +724,11 @@ void i915_request_submit(struct i915_request *request) unsigned long flags;

/* Will be called from irq-context when using foreign fences. */ - spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

__i915_request_submit(request);

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); }

void __i915_request_unsubmit(struct i915_request *request) @@ -742,7 +742,7 @@ void __i915_request_unsubmit(struct i915_request *request) RQ_TRACE(request, "\n");

GEM_BUG_ON(!irqs_disabled()); - lockdep_assert_held(&engine->active.lock); + lockdep_assert_held(&engine->sched_engine->lock);

/* * Before we remove this breadcrumb from the signal list, we have @@ -775,11 +775,11 @@ void i915_request_unsubmit(struct i915_request *request) unsigned long flags;

/* Will be called from irq-context when using foreign fences. */ - spin_lock_irqsave(&engine->active.lock, flags); + spin_lock_irqsave(&engine->sched_engine->lock, flags);

__i915_request_unsubmit(request);

- spin_unlock_irqrestore(&engine->active.lock, flags); + spin_unlock_irqrestore(&engine->sched_engine->lock, flags); }

static void __cancel_request(struct i915_request *rq) diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h index 270f6cd37650..239964bec1fa 100644 --- a/drivers/gpu/drm/i915/i915_request.h +++ b/drivers/gpu/drm/i915/i915_request.h @@ -613,7 +613,7 @@ 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(&rq->engine->sched_engine->lock)); }

static inline u32 diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index 2c31e07883ba..4bc6969f6a97 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -68,7 +68,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio) struct rb_node **parent, *rb; bool first = true;

- lockdep_assert_held(&engine->active.lock); + lockdep_assert_held(&engine->sched_engine->lock); assert_priolists(sched_engine);

if (unlikely(sched_engine->no_priolist)) @@ -147,9 +147,9 @@ sched_lock_engine(const struct i915_sched_node *node, * check that the rq still belongs to the newly locked engine. */ while (locked != (engine = READ_ONCE(rq->engine))) { - spin_unlock(&locked->active.lock); + spin_unlock(&locked->sched_engine->lock); memset(cache, 0, sizeof(*cache)); - spin_lock(&engine->active.lock); + spin_lock(&engine->sched_engine->lock); locked = engine; }

@@ -296,7 +296,7 @@ static void __i915_schedule(struct i915_sched_node *node,

memset(&cache, 0, sizeof(cache)); engine = node_to_request(node)->engine; - spin_lock(&engine->active.lock); + spin_lock(&engine->sched_engine->lock);

/* Fifo and depth-first replacement ensure our deps execute before us */ engine = sched_lock_engine(node, engine, &cache); @@ -305,7 +305,7 @@ static void __i915_schedule(struct i915_sched_node *node,

node = dep->signaler; engine = sched_lock_engine(node, engine, &cache); - lockdep_assert_held(&engine->active.lock); + lockdep_assert_held(&engine->sched_engine->lock);

/* Recheck after acquiring the engine->timeline.lock */ if (prio <= node->attr.priority || node_signaled(node)) @@ -338,7 +338,7 @@ static void __i915_schedule(struct i915_sched_node *node, kick_submission(engine, node_to_request(node), prio); }

- spin_unlock(&engine->active.lock); + spin_unlock(&engine->sched_engine->lock); }

void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr) @@ -511,7 +511,23 @@ i915_sched_engine_create(unsigned int subclass) sched_engine->queue = RB_ROOT_CACHED; sched_engine->queue_priority_hint = INT_MIN;

- /* subclass is used in a follow up patch */ + INIT_LIST_HEAD(&sched_engine->requests); + INIT_LIST_HEAD(&sched_engine->hold); + + spin_lock_init(&sched_engine->lock); + lockdep_set_subclass(&sched_engine->lock, subclass); + + /* + * Due to an interesting quirk in lockdep's internal debug tracking, + * after setting a subclass we must ensure the lock is used. Otherwise, + * nr_unused_locks is incremented once too often. + */ +#ifdef CONFIG_DEBUG_LOCK_ALLOC + local_irq_disable(); + lock_map_acquire(&sched_engine->lock.dep_map); + lock_map_release(&sched_engine->lock.dep_map); + local_irq_enable(); +#endif

return sched_engine; } diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h index 4a7c9f06b40b..74e3bb2b2a65 100644 --- a/drivers/gpu/drm/i915/i915_scheduler_types.h +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h @@ -108,6 +108,22 @@ struct i915_sched_engine { */ struct kref ref;

+ /** + * @lock: protects requests in priority lists, requests, hold and + * tasklet while running + */ + spinlock_t lock; + + /** + * @requests: list of requests inflight on this schedule engine + */ + struct list_head requests; + + /** + * @hold: list of ready requests, but on hold + */ + struct list_head hold; + /** * @default_priolist: priority list for I915_PRIORITY_NORMAL */

Not all back-ends require a kick after a scheduling update, so make the kick a call-back function that the back-end can opt-in to. Also move the current kick function from the scheduler to the execlists file as it is specific to that back-end.

Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com --- .../drm/i915/gt/intel_execlists_submission.c | 52 ++++++++++++++++ drivers/gpu/drm/i915/i915_scheduler.c | 62 +------------------ drivers/gpu/drm/i915/i915_scheduler_types.h | 6 ++ 3 files changed, 60 insertions(+), 60 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index 8a3d4014fd2c..9487d9e0be62 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -3116,10 +3116,61 @@ static bool can_preempt(struct intel_engine_cs *engine) return engine->class != RENDER_CLASS; }

+static void kick_execlists(const struct i915_request *rq, int prio) +{ + struct intel_engine_cs *engine = rq->engine; + struct i915_sched_engine *sched_engine = engine->sched_engine; + const struct i915_request *inflight; + + /* + * We only need to kick the tasklet once for the high priority + * new context we add into the queue. + */ + if (prio <= sched_engine->queue_priority_hint) + return; + + rcu_read_lock(); + + /* Nothing currently active? We're overdue for a submission! */ + inflight = execlists_active(&engine->execlists); + if (!inflight) + goto unlock; + + /* + * If we are already the currently executing context, don't + * bother evaluating if we should preempt ourselves. + */ + if (inflight->context == rq->context) + goto unlock; + + ENGINE_TRACE(engine, + "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n", + prio, + rq->fence.context, rq->fence.seqno, + inflight->fence.context, inflight->fence.seqno, + inflight->sched.attr.priority); + + sched_engine->queue_priority_hint = prio; + + /* + * Allow preemption of low -> normal -> high, but we do + * not allow low priority tasks to preempt other low priority + * tasks under the impression that latency for low priority + * tasks does not matter (as much as background throughput), + * so kiss. + */ + if (prio >= max(I915_PRIORITY_NORMAL, rq_prio(inflight))) + tasklet_hi_schedule(&engine->execlists.tasklet); + +unlock: + rcu_read_unlock(); +} + static void execlists_set_default_submission(struct intel_engine_cs *engine) { engine->submit_request = execlists_submit_request; engine->sched_engine->schedule = i915_schedule; + engine->sched_engine->kick_backend = kick_execlists; engine->execlists.tasklet.callback = execlists_submission_tasklet; }

@@ -3702,6 +3753,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, ve->base.request_alloc = execlists_request_alloc;

ve->base.sched_engine->schedule = i915_schedule; + ve->base.sched_engine->kick_backend = kick_execlists; ve->base.submit_request = virtual_submit_request; ve->base.bond_execute = virtual_bond_execute;

diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index 4bc6969f6a97..035b88f2e4aa 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -157,65 +157,6 @@ sched_lock_engine(const struct i915_sched_node *node, return locked; }

-static inline int rq_prio(const struct i915_request *rq) -{ - return rq->sched.attr.priority; -} - -static inline bool need_preempt(int prio, int active) -{ - /* - * Allow preemption of low -> normal -> high, but we do - * not allow low priority tasks to preempt other low priority - * tasks under the impression that latency for low priority - * tasks does not matter (as much as background throughput), - * so kiss. - */ - return prio >= max(I915_PRIORITY_NORMAL, active); -} - -static void kick_submission(struct intel_engine_cs *engine, - const struct i915_request *rq, - int prio) -{ - const struct i915_request *inflight; - - /* - * We only need to kick the tasklet once for the high priority - * new context we add into the queue. - */ - if (prio <= engine->sched_engine->queue_priority_hint) - return; - - rcu_read_lock(); - - /* Nothing currently active? We're overdue for a submission! */ - inflight = execlists_active(&engine->execlists); - if (!inflight) - goto unlock; - - /* - * If we are already the currently executing context, don't - * bother evaluating if we should preempt ourselves. - */ - if (inflight->context == rq->context) - goto unlock; - - ENGINE_TRACE(engine, - "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n", - prio, - rq->fence.context, rq->fence.seqno, - inflight->fence.context, inflight->fence.seqno, - inflight->sched.attr.priority); - - engine->sched_engine->queue_priority_hint = prio; - if (need_preempt(prio, rq_prio(inflight))) - tasklet_hi_schedule(&engine->execlists.tasklet); - -unlock: - rcu_read_unlock(); -} - static void __i915_schedule(struct i915_sched_node *node, const struct i915_sched_attr *attr) { @@ -335,7 +276,8 @@ static void __i915_schedule(struct i915_sched_node *node, }

/* Defer (tasklet) submission until after all of our updates. */ - kick_submission(engine, node_to_request(node), prio); + if (engine->sched_engine->kick_backend) + engine->sched_engine->kick_backend(node_to_request(node), prio); }

spin_unlock(&engine->sched_engine->lock); diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h index 0c1e417b0164..8bd07d0c27e1 100644 --- a/drivers/gpu/drm/i915/i915_scheduler_types.h +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h @@ -153,6 +153,12 @@ struct i915_sched_engine { */ bool no_priolist;

+ /** + * @kick_backend: kick backend after a request's priority has changed + */ + void (*kick_backend)(const struct i915_request *rq, + int prio); + /** * @schedule: adjust priority of request *

The submission tasklet operates on i915_sched_engine, thus it is the correct place for it.

v3: (Jason Ekstrand) Change sched_engine->engine to a void* private data pointer Add kernel doc v4: (Daniele) Update private_data comment Set queue_priority_hint in kick_execlists v5: (CI) Rebase and fix build error

Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com --- drivers/gpu/drm/i915/gt/intel_engine.h | 14 ---- drivers/gpu/drm/i915/gt/intel_engine_cs.c | 12 +-- drivers/gpu/drm/i915/gt/intel_engine_types.h | 5 -- .../drm/i915/gt/intel_execlists_submission.c | 84 ++++++++++--------- drivers/gpu/drm/i915/gt/mock_engine.c | 1 + drivers/gpu/drm/i915/gt/selftest_execlists.c | 14 ++-- drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 2 +- drivers/gpu/drm/i915/gt/selftest_lrc.c | 6 +- drivers/gpu/drm/i915/gt/selftest_reset.c | 2 +- .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 25 +++--- drivers/gpu/drm/i915/i915_scheduler.c | 1 + drivers/gpu/drm/i915/i915_scheduler.h | 14 ++++ drivers/gpu/drm/i915/i915_scheduler_types.h | 10 +++ 13 files changed, 100 insertions(+), 90 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h index 45ee08fc40a1..f911c1224ab2 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine.h +++ b/drivers/gpu/drm/i915/gt/intel_engine.h @@ -125,20 +125,6 @@ execlists_active(const struct intel_engine_execlists *execlists) return active; }

-static inline void -execlists_active_lock_bh(struct intel_engine_execlists *execlists) -{ - local_bh_disable(); /* prevent local softirq and lock recursion */ - tasklet_lock(&execlists->tasklet); -} - -static inline void -execlists_active_unlock_bh(struct intel_engine_execlists *execlists) -{ - tasklet_unlock(&execlists->tasklet); - local_bh_enable(); /* restore softirq, and kick ksoftirqd! */ -} - struct i915_request * execlists_unwind_incomplete_requests(struct intel_engine_execlists *execlists);

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 354c1c260726..14b92bfd321b 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -713,6 +713,7 @@ static int engine_setup_common(struct intel_engine_cs *engine) err = -ENOMEM; goto err_sched_engine; } + engine->sched_engine->private_data = engine;

err = intel_engine_init_cmd_parser(engine); if (err) @@ -944,7 +945,6 @@ int intel_engines_init(struct intel_gt *gt) void intel_engine_cleanup_common(struct intel_engine_cs *engine) { GEM_BUG_ON(!list_empty(&engine->sched_engine->requests)); - tasklet_kill(&engine->execlists.tasklet); /* flush the callback */

i915_sched_engine_put(engine->sched_engine); intel_breadcrumbs_free(engine->breadcrumbs); @@ -1230,7 +1230,7 @@ static bool ring_is_idle(struct intel_engine_cs *engine)

void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync) { - struct tasklet_struct *t = &engine->execlists.tasklet; + struct tasklet_struct *t = &engine->sched_engine->tasklet;

if (!t->callback) return; @@ -1491,8 +1491,8 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,

drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n", yesno(test_bit(TASKLET_STATE_SCHED, - &engine->execlists.tasklet.state)), - enableddisabled(!atomic_read(&engine->execlists.tasklet.count)), + &engine->sched_engine->tasklet.state)), + enableddisabled(!atomic_read(&engine->sched_engine->tasklet.count)), repr_timer(&engine->execlists.preempt), repr_timer(&engine->execlists.timer));

@@ -1516,7 +1516,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine, idx, hws[idx * 2], hws[idx * 2 + 1]); }

- execlists_active_lock_bh(execlists); + i915_sched_engine_active_lock_bh(engine->sched_engine); rcu_read_lock(); for (port = execlists->active; (rq = *port); port++) { char hdr[160]; @@ -1547,7 +1547,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine, i915_request_show(m, rq, hdr, 0); } rcu_read_unlock(); - execlists_active_unlock_bh(execlists); + i915_sched_engine_active_unlock_bh(engine->sched_engine); } else if (GRAPHICS_VER(dev_priv) > 6) { drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n", ENGINE_READ(engine, RING_PP_DIR_BASE)); diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h index 0bb65c57d274..5b91068ab277 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h @@ -138,11 +138,6 @@ struct st_preempt_hang { * driver and the hardware state for execlist mode of submission. */ struct intel_engine_execlists { - /** - * @tasklet: softirq tasklet for bottom handler - */ - struct tasklet_struct tasklet; - /** * @timer: kick the current context if its timeslice expires */ diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index ffad4d98cec0..cdb2126a159a 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -570,7 +570,7 @@ static void kick_siblings(struct i915_request *rq, struct intel_context *ce) resubmit_virtual_request(rq, ve);

if (READ_ONCE(ve->request)) - tasklet_hi_schedule(&ve->base.execlists.tasklet); + tasklet_hi_schedule(&ve->base.sched_engine->tasklet); }

static void __execlists_schedule_out(struct i915_request * const rq, @@ -739,9 +739,9 @@ trace_ports(const struct intel_engine_execlists *execlists, }

static bool -reset_in_progress(const struct intel_engine_execlists *execlists) +reset_in_progress(const struct intel_engine_cs *engine) { - return unlikely(!__tasklet_is_enabled(&execlists->tasklet)); + return unlikely(!__tasklet_is_enabled(&engine->sched_engine->tasklet)); }

static __maybe_unused noinline bool @@ -757,7 +757,7 @@ assert_pending_valid(const struct intel_engine_execlists *execlists, trace_ports(execlists, msg, execlists->pending);

/* We may be messing around with the lists during reset, lalala */ - if (reset_in_progress(execlists)) + if (reset_in_progress(engine)) return true;

if (!execlists->pending[0]) { @@ -1190,7 +1190,7 @@ static void start_timeslice(struct intel_engine_cs *engine) * its timeslice, so recheck. */ if (!timer_pending(&el->timer)) - tasklet_hi_schedule(&el->tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); return; }

@@ -1772,8 +1772,8 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive) * access. Either we are inside the tasklet, or the tasklet is disabled * and we assume that is only inside the reset paths and so serialised. */ - GEM_BUG_ON(!tasklet_is_locked(&execlists->tasklet) && - !reset_in_progress(execlists)); + GEM_BUG_ON(!tasklet_is_locked(&engine->sched_engine->tasklet) && + !reset_in_progress(engine));

/* * Note that csb_write, csb_status may be either in HWSP or mmio. @@ -2131,7 +2131,7 @@ static void execlists_unhold(struct intel_engine_cs *engine,

if (rq_prio(rq) > engine->sched_engine->queue_priority_hint) { engine->sched_engine->queue_priority_hint = rq_prio(rq); - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); }

spin_unlock_irq(&engine->sched_engine->lock); @@ -2322,13 +2322,13 @@ static void execlists_reset(struct intel_engine_cs *engine, const char *msg) ENGINE_TRACE(engine, "reset for %s\n", msg);

/* Mark this tasklet as disabled to avoid waiting for it to complete */ - tasklet_disable_nosync(&engine->execlists.tasklet); + tasklet_disable_nosync(&engine->sched_engine->tasklet);

ring_set_paused(engine, 1); /* Freeze the current request in place */ execlists_capture(engine); intel_engine_reset(engine, msg);

- tasklet_enable(&engine->execlists.tasklet); + tasklet_enable(&engine->sched_engine->tasklet); clear_and_wake_up_bit(bit, lock); }

@@ -2351,8 +2351,9 @@ static bool preempt_timeout(const struct intel_engine_cs *const engine) */ static void execlists_submission_tasklet(struct tasklet_struct *t) { - struct intel_engine_cs * const engine = - from_tasklet(engine, t, execlists.tasklet); + struct i915_sched_engine *sched_engine = + from_tasklet(sched_engine, t, tasklet); + struct intel_engine_cs * const engine = sched_engine->private_data; struct i915_request *post[2 * EXECLIST_MAX_PORTS]; struct i915_request **inactive;

@@ -2427,13 +2428,16 @@ static void execlists_irq_handler(struct intel_engine_cs *engine, u16 iir) intel_engine_signal_breadcrumbs(engine);

if (tasklet) - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); }

static void __execlists_kick(struct intel_engine_execlists *execlists) { + struct intel_engine_cs *engine = + container_of(execlists, typeof(*engine), execlists); + /* Kick the tasklet for some interrupt coalescing and reset handling */ - tasklet_hi_schedule(&execlists->tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); }

#define execlists_kick(t, member) \ @@ -2808,10 +2812,8 @@ static int execlists_resume(struct intel_engine_cs *engine)

static void execlists_reset_prepare(struct intel_engine_cs *engine) { - struct intel_engine_execlists * const execlists = &engine->execlists; - ENGINE_TRACE(engine, "depth<-%d\n", - atomic_read(&execlists->tasklet.count)); + atomic_read(&engine->sched_engine->tasklet.count));

/* * Prevent request submission to the hardware until we have @@ -2822,8 +2824,8 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine) * Turning off the execlists->tasklet until the reset is over * prevents the race. */ - __tasklet_disable_sync_once(&execlists->tasklet); - GEM_BUG_ON(!reset_in_progress(execlists)); + __tasklet_disable_sync_once(&engine->sched_engine->tasklet); + GEM_BUG_ON(!reset_in_progress(engine));

/* * We stop engines, otherwise we might get failed reset and a @@ -2973,8 +2975,9 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)

static void nop_submission_tasklet(struct tasklet_struct *t) { - struct intel_engine_cs * const engine = - from_tasklet(engine, t, execlists.tasklet); + struct i915_sched_engine *sched_engine = + from_tasklet(sched_engine, t, tasklet); + struct intel_engine_cs * const engine = sched_engine->private_data;

/* The driver is wedged; don't process any more events. */ WRITE_ONCE(engine->sched_engine->queue_priority_hint, INT_MIN); @@ -3061,8 +3064,8 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) sched_engine->queue_priority_hint = INT_MIN; sched_engine->queue = RB_ROOT_CACHED;

- GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet)); - execlists->tasklet.callback = nop_submission_tasklet; + GEM_BUG_ON(__tasklet_is_enabled(&engine->sched_engine->tasklet)); + engine->sched_engine->tasklet.callback = nop_submission_tasklet;

spin_unlock_irqrestore(&engine->sched_engine->lock, flags); rcu_read_unlock(); @@ -3082,14 +3085,14 @@ static void execlists_reset_finish(struct intel_engine_cs *engine) * reset as the next level of recovery, and as a final resort we * will declare the device wedged. */ - GEM_BUG_ON(!reset_in_progress(execlists)); + GEM_BUG_ON(!reset_in_progress(engine));

/* And kick in case we missed a new request submission. */ - if (__tasklet_enable(&execlists->tasklet)) + if (__tasklet_enable(&engine->sched_engine->tasklet)) __execlists_kick(execlists);

ENGINE_TRACE(engine, "depth->%d\n", - atomic_read(&execlists->tasklet.count)); + atomic_read(&engine->sched_engine->tasklet.count)); }

static void gen8_logical_ring_enable_irq(struct intel_engine_cs *engine) @@ -3163,7 +3166,7 @@ static void kick_execlists(const struct i915_request *rq, int prio) * so kiss. */ if (prio >= max(I915_PRIORITY_NORMAL, rq_prio(inflight))) - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&sched_engine->tasklet);

unlock: rcu_read_unlock(); @@ -3174,7 +3177,7 @@ static void execlists_set_default_submission(struct intel_engine_cs *engine) engine->submit_request = execlists_submit_request; engine->sched_engine->schedule = i915_schedule; engine->sched_engine->kick_backend = kick_execlists; - engine->execlists.tasklet.callback = execlists_submission_tasklet; + engine->sched_engine->tasklet.callback = execlists_submission_tasklet; }

static void execlists_shutdown(struct intel_engine_cs *engine) @@ -3182,7 +3185,7 @@ static void execlists_shutdown(struct intel_engine_cs *engine) /* Synchronise with residual timers and any softirq they raise */ del_timer_sync(&engine->execlists.timer); del_timer_sync(&engine->execlists.preempt); - tasklet_kill(&engine->execlists.tasklet); + tasklet_kill(&engine->sched_engine->tasklet); }

static void execlists_release(struct intel_engine_cs *engine) @@ -3298,7 +3301,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine) struct intel_uncore *uncore = engine->uncore; u32 base = engine->mmio_base;

- tasklet_setup(&engine->execlists.tasklet, execlists_submission_tasklet); + tasklet_setup(&engine->sched_engine->tasklet, execlists_submission_tasklet); timer_setup(&engine->execlists.timer, execlists_timeslice, 0); timer_setup(&engine->execlists.preempt, execlists_preempt, 0);

@@ -3380,7 +3383,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk) * rbtrees as in the case it is running in parallel, it may reinsert * the rb_node into a sibling. */ - tasklet_kill(&ve->base.execlists.tasklet); + tasklet_kill(&ve->base.sched_engine->tasklet);

/* Decouple ourselves from the siblings, no more access allowed. */ for (n = 0; n < ve->num_siblings; n++) { @@ -3392,13 +3395,13 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)

spin_lock_irq(&sibling->sched_engine->lock);

- /* Detachment is lazily performed in the execlists tasklet */ + /* Detachment is lazily performed in the sched_engine->tasklet */ if (!RB_EMPTY_NODE(node)) rb_erase_cached(node, &sibling->execlists.virtual);

spin_unlock_irq(&sibling->sched_engine->lock); } - GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet)); + GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.sched_engine->tasklet)); GEM_BUG_ON(!list_empty(virtual_queue(ve)));

lrc_fini(&ve->context); @@ -3545,9 +3548,11 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve)

static void virtual_submission_tasklet(struct tasklet_struct *t) { + struct i915_sched_engine *sched_engine = + from_tasklet(sched_engine, t, tasklet); struct virtual_engine * const ve = - from_tasklet(ve, t, base.execlists.tasklet); - const int prio = READ_ONCE(ve->base.sched_engine->queue_priority_hint); + (struct virtual_engine *)sched_engine->private_data; + const int prio = READ_ONCE(sched_engine->queue_priority_hint); intel_engine_mask_t mask; unsigned int n;

@@ -3616,7 +3621,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t) GEM_BUG_ON(RB_EMPTY_NODE(&node->rb)); node->prio = prio; if (first && prio > sibling->sched_engine->queue_priority_hint) - tasklet_hi_schedule(&sibling->execlists.tasklet); + tasklet_hi_schedule(&sibling->sched_engine->tasklet);

unlock_engine: spin_unlock_irq(&sibling->sched_engine->lock); @@ -3657,7 +3662,7 @@ static void virtual_submit_request(struct i915_request *rq) GEM_BUG_ON(!list_empty(virtual_queue(ve))); list_move_tail(&rq->sched.link, virtual_queue(ve));

- tasklet_hi_schedule(&ve->base.execlists.tasklet); + tasklet_hi_schedule(&ve->base.sched_engine->tasklet);

unlock: spin_unlock_irqrestore(&ve->base.sched_engine->lock, flags); @@ -3751,6 +3756,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, err = -ENOMEM; goto err_put; } + ve->base.sched_engine->private_data = &ve->base;

ve->base.cops = &virtual_context_ops; ve->base.request_alloc = execlists_request_alloc; @@ -3761,7 +3767,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, ve->base.bond_execute = virtual_bond_execute;

INIT_LIST_HEAD(virtual_queue(ve)); - tasklet_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet); + tasklet_setup(&ve->base.sched_engine->tasklet, virtual_submission_tasklet);

intel_context_init(&ve->context, &ve->base);

@@ -3789,7 +3795,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, * layering if we handle cloning of the requests and * submitting a copy into each backend. */ - if (sibling->execlists.tasklet.callback != + if (sibling->sched_engine->tasklet.callback != execlists_submission_tasklet) { err = -ENODEV; goto err_put; diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c index a49fd3039f13..68970398e4ef 100644 --- a/drivers/gpu/drm/i915/gt/mock_engine.c +++ b/drivers/gpu/drm/i915/gt/mock_engine.c @@ -349,6 +349,7 @@ int mock_engine_init(struct intel_engine_cs *engine) engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK); if (!engine->sched_engine) return -ENOMEM; + engine->sched_engine->private_data = engine;

intel_engine_init_execlists(engine); intel_engine_init__pm(engine); diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c index 72f8cc914f4f..08896ae027d5 100644 --- a/drivers/gpu/drm/i915/gt/selftest_execlists.c +++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c @@ -43,7 +43,7 @@ static int wait_for_submit(struct intel_engine_cs *engine, unsigned long timeout) { /* Ignore our own attempts to suppress excess tasklets */ - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet);

timeout += jiffies; do { @@ -553,13 +553,13 @@ static int live_pin_rewind(void *arg)

static int engine_lock_reset_tasklet(struct intel_engine_cs *engine) { - tasklet_disable(&engine->execlists.tasklet); + tasklet_disable(&engine->sched_engine->tasklet); local_bh_disable();

if (test_and_set_bit(I915_RESET_ENGINE + engine->id, &engine->gt->reset.flags)) { local_bh_enable(); - tasklet_enable(&engine->execlists.tasklet); + tasklet_enable(&engine->sched_engine->tasklet);

intel_gt_set_wedged(engine->gt); return -EBUSY; @@ -574,7 +574,7 @@ static void engine_unlock_reset_tasklet(struct intel_engine_cs *engine) &engine->gt->reset.flags);

local_bh_enable(); - tasklet_enable(&engine->execlists.tasklet); + tasklet_enable(&engine->sched_engine->tasklet); }

static int live_hold_reset(void *arg) @@ -628,7 +628,7 @@ static int live_hold_reset(void *arg) if (err) goto out;

- engine->execlists.tasklet.callback(&engine->execlists.tasklet); + engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet); GEM_BUG_ON(execlists_active(&engine->execlists) != rq);

i915_request_get(rq); @@ -1200,7 +1200,7 @@ static int live_timeslice_rewind(void *arg) while (i915_request_is_active(rq[A2])) { /* semaphore yield! */ /* Wait for the timeslice to kick in */ del_timer(&engine->execlists.timer); - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); intel_engine_flush_submission(engine); } /* -> ELSP[] = { { A:rq1 }, { B:rq1 } } */ @@ -4606,7 +4606,7 @@ static int reset_virtual_engine(struct intel_gt *gt, if (err) goto out_heartbeat;

- engine->execlists.tasklet.callback(&engine->execlists.tasklet); + engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet); GEM_BUG_ON(execlists_active(&engine->execlists) != rq);

/* Fake a preemption event; failed of course */ diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c index cec4b9977c9b..6a0b04bdac58 100644 --- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c +++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c @@ -1702,7 +1702,7 @@ static int __igt_atomic_reset_engine(struct intel_engine_cs *engine, const struct igt_atomic_section *p, const char *mode) { - struct tasklet_struct * const t = &engine->execlists.tasklet; + struct tasklet_struct * const t = &engine->sched_engine->tasklet; int err;

GEM_TRACE("i915_reset_engine(%s:%s) under %s\n", diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index 3119016d9910..b0977a3b699b 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -49,7 +49,7 @@ static int wait_for_submit(struct intel_engine_cs *engine, unsigned long timeout) { /* Ignore our own attempts to suppress excess tasklets */ - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet);

timeout += jiffies; do { @@ -1613,12 +1613,12 @@ static void garbage_reset(struct intel_engine_cs *engine,

local_bh_disable(); if (!test_and_set_bit(bit, lock)) { - tasklet_disable(&engine->execlists.tasklet); + tasklet_disable(&engine->sched_engine->tasklet);

if (!rq->fence.error) __intel_engine_reset_bh(engine, NULL);

- tasklet_enable(&engine->execlists.tasklet); + tasklet_enable(&engine->sched_engine->tasklet); clear_and_wake_up_bit(bit, lock); } local_bh_enable(); diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c b/drivers/gpu/drm/i915/gt/selftest_reset.c index 8784257ec808..7a50c9f4071b 100644 --- a/drivers/gpu/drm/i915/gt/selftest_reset.c +++ b/drivers/gpu/drm/i915/gt/selftest_reset.c @@ -321,7 +321,7 @@ static int igt_atomic_engine_reset(void *arg) goto out_unlock;

for_each_engine(engine, gt, id) { - struct tasklet_struct *t = &engine->execlists.tasklet; + struct tasklet_struct *t = &engine->sched_engine->tasklet;

if (t->func) tasklet_disable(t); 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 cb13cc586c67..e9c237b18692 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -241,8 +241,9 @@ static void __guc_dequeue(struct intel_engine_cs *engine)

static void guc_submission_tasklet(struct tasklet_struct *t) { - struct intel_engine_cs * const engine = - from_tasklet(engine, t, execlists.tasklet); + struct i915_sched_engine *sched_engine = + from_tasklet(sched_engine, t, tasklet); + struct intel_engine_cs * const engine = sched_engine->private_data; struct intel_engine_execlists * const execlists = &engine->execlists; struct i915_request **port, *rq; unsigned long flags; @@ -272,14 +273,12 @@ static void cs_irq_handler(struct intel_engine_cs *engine, u16 iir) { if (iir & GT_RENDER_USER_INTERRUPT) { intel_engine_signal_breadcrumbs(engine); - tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet); } }

static void guc_reset_prepare(struct intel_engine_cs *engine) { - struct intel_engine_execlists * const execlists = &engine->execlists; - ENGINE_TRACE(engine, "\n");

/* @@ -291,7 +290,7 @@ static void guc_reset_prepare(struct intel_engine_cs *engine) * Turning off the execlists->tasklet until the reset is over * prevents the race. */ - __tasklet_disable_sync_once(&execlists->tasklet); + __tasklet_disable_sync_once(&engine->sched_engine->tasklet); }

static void guc_reset_state(struct intel_context *ce, @@ -395,14 +394,12 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)

static void guc_reset_finish(struct intel_engine_cs *engine) { - struct intel_engine_execlists * const execlists = &engine->execlists; - - if (__tasklet_enable(&execlists->tasklet)) + if (__tasklet_enable(&engine->sched_engine->tasklet)) /* And kick in case we missed a new request submission. */ - tasklet_hi_schedule(&execlists->tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet);

ENGINE_TRACE(engine, "depth->%d\n", - atomic_read(&execlists->tasklet.count)); + atomic_read(&engine->sched_engine->tasklet.count)); }

/* @@ -520,7 +517,7 @@ static void guc_submit_request(struct i915_request *rq) GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine)); GEM_BUG_ON(list_empty(&rq->sched.link));

- tasklet_hi_schedule(&engine->execlists.tasklet); + tasklet_hi_schedule(&engine->sched_engine->tasklet);

spin_unlock_irqrestore(&engine->sched_engine->lock, flags); } @@ -600,7 +597,7 @@ static void guc_release(struct intel_engine_cs *engine) { engine->sanitize = NULL; /* no longer in control, nothing to sanitize */

- tasklet_kill(&engine->execlists.tasklet); + tasklet_kill(&engine->sched_engine->tasklet);

intel_engine_cleanup_common(engine); lrc_fini_wa_ctx(engine); @@ -679,7 +676,7 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine) */ GEM_BUG_ON(GRAPHICS_VER(i915) < 11);

- tasklet_setup(&engine->execlists.tasklet, guc_submission_tasklet); + tasklet_setup(&engine->sched_engine->tasklet, guc_submission_tasklet);

guc_default_vfuncs(engine); guc_default_irqs(engine); diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index fa8863df9513..3a58a9130309 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -436,6 +436,7 @@ void i915_sched_engine_free(struct kref *kref) struct i915_sched_engine *sched_engine = container_of(kref, typeof(*sched_engine), ref);

+ tasklet_kill(&sched_engine->tasklet); /* flush the callback */ kfree(sched_engine); }

diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h index 0014745bda30..650ab8e0db9f 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.h +++ b/drivers/gpu/drm/i915/i915_scheduler.h @@ -79,6 +79,20 @@ i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine) sched_engine->no_priolist = false; }

+static inline void +i915_sched_engine_active_lock_bh(struct i915_sched_engine *sched_engine) +{ + local_bh_disable(); /* prevent local softirq and lock recursion */ + tasklet_lock(&sched_engine->tasklet); +} + +static inline void +i915_sched_engine_active_unlock_bh(struct i915_sched_engine *sched_engine) +{ + tasklet_unlock(&sched_engine->tasklet); + local_bh_enable(); /* restore softirq, and kick ksoftirqd! */ +} + void i915_request_show_with_schedule(struct drm_printer *m, const struct i915_request *rq, const char *prefix, diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h index 8bd07d0c27e1..5935c3152bdc 100644 --- a/drivers/gpu/drm/i915/i915_scheduler_types.h +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h @@ -124,6 +124,11 @@ struct i915_sched_engine { */ struct list_head hold;

+ /** + * @tasklet: softirq tasklet for submission + */ + struct tasklet_struct tasklet; + /** * @default_priolist: priority list for I915_PRIORITY_NORMAL */ @@ -153,6 +158,11 @@ struct i915_sched_engine { */ bool no_priolist;

+ /** + * @private_data: private data of the submission backend + */ + void *private_data; + /** * @kick_backend: kick backend after a request's priority has changed */