diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_cs.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_pm.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_types.h | 32 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 81 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/mock_engine.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 19 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scheduler.c | 53 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scheduler.h | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scheduler_types.h | 47 |
9 files changed, 187 insertions, 90 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 04c1f5b9ce71..62a28c3c44a8 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -585,9 +585,6 @@ void intel_engine_init_execlists(struct intel_engine_cs *engine) memset(execlists->pending, 0, sizeof(execlists->pending)); execlists->active = memset(execlists->inflight, 0, sizeof(execlists->inflight)); - - execlists->queue_priority_hint = INT_MIN; - execlists->queue = RB_ROOT_CACHED; } static void cleanup_status_page(struct intel_engine_cs *engine) @@ -714,6 +711,12 @@ static int engine_setup_common(struct intel_engine_cs *engine) goto err_status; } + engine->sched_engine = i915_sched_engine_create(ENGINE_PHYSICAL); + if (!engine->sched_engine) { + err = -ENOMEM; + goto err_sched_engine; + } + err = intel_engine_init_cmd_parser(engine); if (err) goto err_cmd_parser; @@ -737,6 +740,8 @@ static int engine_setup_common(struct intel_engine_cs *engine) return 0; err_cmd_parser: + i915_sched_engine_put(engine->sched_engine); +err_sched_engine: intel_breadcrumbs_free(engine->breadcrumbs); err_status: cleanup_status_page(engine); @@ -967,6 +972,7 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine) GEM_BUG_ON(!list_empty(&engine->active.requests)); tasklet_kill(&engine->execlists.tasklet); /* flush the callback */ + i915_sched_engine_put(engine->sched_engine); intel_breadcrumbs_free(engine->breadcrumbs); intel_engine_fini_retire(engine); @@ -1253,7 +1259,7 @@ 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->execlists.queue.rb_root)) + if (!RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)) return false; /* Ring stopped? */ diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c index 47f4397095e5..b6a00dd72808 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c @@ -275,12 +275,12 @@ static int __engine_park(struct intel_wakeref *wf) intel_breadcrumbs_park(engine->breadcrumbs); /* Must be reset upon idling, or we may miss the busy wakeup. */ - GEM_BUG_ON(engine->execlists.queue_priority_hint != INT_MIN); + GEM_BUG_ON(engine->sched_engine->queue_priority_hint != INT_MIN); if (engine->park) engine->park(engine); - engine->execlists.no_priolist = false; + engine->sched_engine->no_priolist = false; /* While gt calls i915_vma_parked(), we have to break the lock cycle */ intel_gt_pm_put_async(engine->gt); diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h index e113f93b3274..e41a9c3f9269 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h @@ -59,6 +59,7 @@ struct drm_i915_reg_table; struct i915_gem_context; struct i915_request; struct i915_sched_attr; +struct i915_sched_engine; struct intel_gt; struct intel_ring; struct intel_uncore; @@ -153,11 +154,6 @@ struct intel_engine_execlists { struct timer_list preempt; /** - * @default_priolist: priority list for I915_PRIORITY_NORMAL - */ - struct i915_priolist default_priolist; - - /** * @ccid: identifier for contexts submitted to this engine */ u32 ccid; @@ -192,11 +188,6 @@ struct intel_engine_execlists { u32 reset_ccid; /** - * @no_priolist: priority lists disabled - */ - bool no_priolist; - - /** * @submit_reg: gen-specific execlist submission register * set to the ExecList Submission Port (elsp) register pre-Gen11 and to * the ExecList Submission Queue Contents register array for Gen11+ @@ -238,23 +229,10 @@ struct intel_engine_execlists { unsigned int port_mask; /** - * @queue_priority_hint: Highest pending priority. - * - * When we add requests into the queue, or adjust the priority of - * executing requests, we compute the maximum priority of those - * pending requests. We can then use this value to determine if - * we need to preempt the executing requests to service the queue. - * However, since the we may have recorded the priority of an inflight - * request we wanted to preempt but since completed, at the time of - * dequeuing the priority hint may no longer may match the highest - * available request priority. + * @virtual: Queue of requets on a virtual engine, sorted by priority. + * Each RB entry is a struct i915_priolist containing a list of requests + * of the same priority. */ - int queue_priority_hint; - - /** - * @queue: queue of requests, in priority lists - */ - struct rb_root_cached queue; struct rb_root_cached virtual; /** @@ -332,6 +310,8 @@ struct intel_engine_cs { 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 */ struct i915_request *request_pool; diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index fc77592d88a9..4f759559a792 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -273,11 +273,11 @@ static int effective_prio(const struct i915_request *rq) return prio; } -static int queue_prio(const struct intel_engine_execlists *execlists) +static int queue_prio(const struct i915_sched_engine *sched_engine) { struct rb_node *rb; - rb = rb_first_cached(&execlists->queue); + rb = rb_first_cached(&sched_engine->queue); if (!rb) return INT_MIN; @@ -318,7 +318,7 @@ static bool need_preempt(const struct intel_engine_cs *engine, * to preserve FIFO ordering of dependencies. */ last_prio = max(effective_prio(rq), I915_PRIORITY_NORMAL - 1); - if (engine->execlists.queue_priority_hint <= last_prio) + if (engine->sched_engine->queue_priority_hint <= last_prio) return false; /* @@ -340,7 +340,7 @@ static bool need_preempt(const struct intel_engine_cs *engine, * context, it's priority would not exceed ELSP[0] aka last_prio. */ return max(virtual_prio(&engine->execlists), - queue_prio(&engine->execlists)) > last_prio; + queue_prio(engine->sched_engine)) > last_prio; } __maybe_unused static bool @@ -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->execlists.queue.rb_root)); + GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); 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->execlists.queue.rb_root)) { + if (!RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)) { ENGINE_TRACE(engine, "timeslice required for queue\n"); return true; } @@ -1236,6 +1236,7 @@ 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_engine * const sched_engine = engine->sched_engine; struct i915_request **port = execlists->pending; struct i915_request ** const last_port = port + execlists->port_mask; struct i915_request *last, * const *active; @@ -1287,7 +1288,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) last->fence.context, last->fence.seqno, last->sched.attr.priority, - execlists->queue_priority_hint); + sched_engine->queue_priority_hint); record_preemption(execlists); /* @@ -1313,7 +1314,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) yesno(timer_expired(&execlists->timer)), last->fence.context, last->fence.seqno, rq_prio(last), - execlists->queue_priority_hint, + sched_engine->queue_priority_hint, yesno(timeslice_yield(execlists, last))); /* @@ -1384,7 +1385,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) GEM_BUG_ON(rq->engine != &ve->base); GEM_BUG_ON(rq->context != &ve->context); - if (unlikely(rq_prio(rq) < queue_prio(execlists))) { + if (unlikely(rq_prio(rq) < queue_prio(sched_engine))) { spin_unlock(&ve->base.active.lock); break; } @@ -1405,7 +1406,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine) yesno(engine != ve->siblings[0])); WRITE_ONCE(ve->request, NULL); - WRITE_ONCE(ve->base.execlists.queue_priority_hint, INT_MIN); + WRITE_ONCE(ve->base.sched_engine->queue_priority_hint, INT_MIN); rb = &ve->nodes[engine->id].rb; rb_erase_cached(rb, &execlists->virtual); @@ -1450,7 +1451,7 @@ unlock: break; } - while ((rb = rb_first_cached(&execlists->queue))) { + while ((rb = rb_first_cached(&sched_engine->queue))) { struct i915_priolist *p = to_priolist(rb); struct i915_request *rq, *rn; @@ -1529,7 +1530,7 @@ unlock: } } - rb_erase_cached(&p->node, &execlists->queue); + rb_erase_cached(&p->node, &sched_engine->queue); i915_priolist_free(p); } done: @@ -1551,7 +1552,7 @@ done: * request triggering preemption on the next dequeue (or subsequent * interrupt for secondary ports). */ - execlists->queue_priority_hint = queue_prio(execlists); + sched_engine->queue_priority_hint = queue_prio(sched_engine); spin_unlock(&engine->active.lock); /* @@ -2123,8 +2124,8 @@ static void execlists_unhold(struct intel_engine_cs *engine, */ __execlists_unhold(rq); - if (rq_prio(rq) > engine->execlists.queue_priority_hint) { - engine->execlists.queue_priority_hint = rq_prio(rq); + 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); } @@ -2455,12 +2456,12 @@ static void queue_request(struct intel_engine_cs *engine, static bool submit_queue(struct intel_engine_cs *engine, const struct i915_request *rq) { - struct intel_engine_execlists *execlists = &engine->execlists; + struct i915_sched_engine *sched_engine = engine->sched_engine; - if (rq_prio(rq) <= execlists->queue_priority_hint) + if (rq_prio(rq) <= sched_engine->queue_priority_hint) return false; - execlists->queue_priority_hint = rq_prio(rq); + sched_engine->queue_priority_hint = rq_prio(rq); return true; } @@ -2486,7 +2487,7 @@ static void execlists_submit_request(struct i915_request *request) } else { queue_request(engine, request); - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)); + GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); GEM_BUG_ON(list_empty(&request->sched.link)); if (submit_queue(engine, request)) @@ -2969,12 +2970,13 @@ static void nop_submission_tasklet(struct tasklet_struct *t) from_tasklet(engine, t, execlists.tasklet); /* The driver is wedged; don't process any more events. */ - WRITE_ONCE(engine->execlists.queue_priority_hint, INT_MIN); + WRITE_ONCE(engine->sched_engine->queue_priority_hint, INT_MIN); } static void execlists_reset_cancel(struct intel_engine_cs *engine) { struct intel_engine_execlists * const execlists = &engine->execlists; + struct i915_sched_engine * const sched_engine = engine->sched_engine; struct i915_request *rq, *rn; struct rb_node *rb; unsigned long flags; @@ -3006,7 +3008,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) intel_engine_signal_breadcrumbs(engine); /* Flush the queued requests to the timeline list (for retiring). */ - while ((rb = rb_first_cached(&execlists->queue))) { + while ((rb = rb_first_cached(&sched_engine->queue))) { struct i915_priolist *p = to_priolist(rb); priolist_for_each_request_consume(rq, rn, p) { @@ -3016,7 +3018,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) } } - rb_erase_cached(&p->node, &execlists->queue); + rb_erase_cached(&p->node, &sched_engine->queue); i915_priolist_free(p); } @@ -3042,15 +3044,15 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) } i915_request_put(rq); - ve->base.execlists.queue_priority_hint = INT_MIN; + ve->base.sched_engine->queue_priority_hint = INT_MIN; } spin_unlock(&ve->base.active.lock); } /* Remaining _unready_ requests will be nop'ed when submitted */ - execlists->queue_priority_hint = INT_MIN; - execlists->queue = RB_ROOT_CACHED; + 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; @@ -3286,7 +3288,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine) static struct list_head *virtual_queue(struct virtual_engine *ve) { - return &ve->base.execlists.default_priolist.requests; + return &ve->base.sched_engine->default_priolist.requests; } static void rcu_virtual_context_destroy(struct work_struct *wrk) @@ -3344,7 +3346,10 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk) lrc_fini(&ve->context); intel_context_fini(&ve->context); - intel_breadcrumbs_free(ve->base.breadcrumbs); + if (ve->base.breadcrumbs) + intel_breadcrumbs_free(ve->base.breadcrumbs); + if (ve->base.sched_engine) + i915_sched_engine_put(ve->base.sched_engine); intel_engine_free_request_pool(&ve->base); kfree(ve->bonds); @@ -3475,7 +3480,7 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve) ENGINE_TRACE(&ve->base, "rq=%llx:%lld, mask=%x, prio=%d\n", rq->fence.context, rq->fence.seqno, - mask, ve->base.execlists.queue_priority_hint); + mask, ve->base.sched_engine->queue_priority_hint); return mask; } @@ -3484,7 +3489,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t) { struct virtual_engine * const ve = from_tasklet(ve, t, base.execlists.tasklet); - const int prio = READ_ONCE(ve->base.execlists.queue_priority_hint); + const int prio = READ_ONCE(ve->base.sched_engine->queue_priority_hint); intel_engine_mask_t mask; unsigned int n; @@ -3552,7 +3557,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t) submit_engine: GEM_BUG_ON(RB_EMPTY_NODE(&node->rb)); node->prio = prio; - if (first && prio > sibling->execlists.queue_priority_hint) + if (first && prio > sibling->sched_engine->queue_priority_hint) tasklet_hi_schedule(&sibling->execlists.tasklet); unlock_engine: @@ -3588,7 +3593,7 @@ static void virtual_submit_request(struct i915_request *rq) i915_request_put(ve->request); } - ve->base.execlists.queue_priority_hint = rq_prio(rq); + ve->base.sched_engine->queue_priority_hint = rq_prio(rq); ve->request = i915_request_get(rq); GEM_BUG_ON(!list_empty(virtual_queue(ve))); @@ -3684,6 +3689,12 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, intel_engine_init_active(&ve->base, ENGINE_VIRTUAL); intel_engine_init_execlists(&ve->base); + ve->base.sched_engine = i915_sched_engine_create(ENGINE_VIRTUAL); + if (!ve->base.sched_engine) { + err = -ENOMEM; + goto err_put; + } + ve->base.cops = &virtual_context_ops; ve->base.request_alloc = execlists_request_alloc; @@ -3692,7 +3703,6 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings, ve->base.bond_execute = virtual_bond_execute; INIT_LIST_HEAD(virtual_queue(ve)); - ve->base.execlists.queue_priority_hint = INT_MIN; tasklet_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet); intel_context_init(&ve->context, &ve->base); @@ -3849,6 +3859,7 @@ 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_request *rq, *last; unsigned long flags; unsigned int count; @@ -3873,13 +3884,13 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine, show_request(m, last, "\t\t", 0); } - if (execlists->queue_priority_hint != INT_MIN) + if (sched_engine->queue_priority_hint != INT_MIN) drm_printf(m, "\t\tQueue priority hint: %d\n", - READ_ONCE(execlists->queue_priority_hint)); + READ_ONCE(sched_engine->queue_priority_hint)); last = NULL; count = 0; - for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) { + for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) { struct i915_priolist *p = rb_entry(rb, typeof(*p), node); priolist_for_each_request(rq, p) { diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c index 32589c6625e1..b1fdba13e900 100644 --- a/drivers/gpu/drm/i915/gt/mock_engine.c +++ b/drivers/gpu/drm/i915/gt/mock_engine.c @@ -283,6 +283,7 @@ static void mock_engine_release(struct intel_engine_cs *engine) GEM_BUG_ON(timer_pending(&mock->hw_delay)); + i915_sched_engine_put(engine->sched_engine); intel_breadcrumbs_free(engine->breadcrumbs); intel_context_unpin(engine->kernel_context); @@ -345,6 +346,10 @@ int mock_engine_init(struct intel_engine_cs *engine) { struct intel_context *ce; + engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK); + if (!engine->sched_engine) + return -ENOMEM; + intel_engine_init_active(engine, ENGINE_MOCK); intel_engine_init_execlists(engine); intel_engine_init__pm(engine); @@ -352,7 +357,7 @@ int mock_engine_init(struct intel_engine_cs *engine) engine->breadcrumbs = intel_breadcrumbs_create(NULL); if (!engine->breadcrumbs) - return -ENOMEM; + goto err_schedule; ce = create_kernel_context(engine); if (IS_ERR(ce)) @@ -366,6 +371,8 @@ int mock_engine_init(struct intel_engine_cs *engine) err_breadcrumbs: intel_breadcrumbs_free(engine->breadcrumbs); +err_schedule: + i915_sched_engine_put(engine->sched_engine); return -ENOMEM; } 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 7c8ff9792f7b..5c5f33f40055 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -182,6 +182,7 @@ 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_engine * const sched_engine = engine->sched_engine; struct i915_request **first = execlists->inflight; struct i915_request ** const last_port = first + execlists->port_mask; struct i915_request *last = first[0]; @@ -204,7 +205,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine) * event. */ port = first; - while ((rb = rb_first_cached(&execlists->queue))) { + while ((rb = rb_first_cached(&sched_engine->queue))) { struct i915_priolist *p = to_priolist(rb); struct i915_request *rq, *rn; @@ -224,11 +225,11 @@ static void __guc_dequeue(struct intel_engine_cs *engine) last = rq; } - rb_erase_cached(&p->node, &execlists->queue); + rb_erase_cached(&p->node, &sched_engine->queue); i915_priolist_free(p); } done: - execlists->queue_priority_hint = + sched_engine->queue_priority_hint = rb ? to_priolist(rb)->priority : INT_MIN; if (submit) { *port = schedule_in(last, port - execlists->inflight); @@ -338,7 +339,7 @@ out_unlock: static void guc_reset_cancel(struct intel_engine_cs *engine) { - struct intel_engine_execlists * const execlists = &engine->execlists; + struct i915_sched_engine * const sched_engine = engine->sched_engine; struct i915_request *rq, *rn; struct rb_node *rb; unsigned long flags; @@ -368,7 +369,7 @@ static void guc_reset_cancel(struct intel_engine_cs *engine) } /* Flush the queued requests to the timeline list (for retiring). */ - while ((rb = rb_first_cached(&execlists->queue))) { + while ((rb = rb_first_cached(&sched_engine->queue))) { struct i915_priolist *p = to_priolist(rb); priolist_for_each_request_consume(rq, rn, p) { @@ -378,14 +379,14 @@ static void guc_reset_cancel(struct intel_engine_cs *engine) i915_request_mark_complete(rq); } - rb_erase_cached(&p->node, &execlists->queue); + rb_erase_cached(&p->node, &sched_engine->queue); i915_priolist_free(p); } /* Remaining _unready_ requests will be nop'ed when submitted */ - execlists->queue_priority_hint = INT_MIN; - execlists->queue = RB_ROOT_CACHED; + sched_engine->queue_priority_hint = INT_MIN; + sched_engine->queue = RB_ROOT_CACHED; spin_unlock_irqrestore(&engine->active.lock, flags); } @@ -514,7 +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->execlists.queue.rb_root)); + GEM_BUG_ON(RB_EMPTY_ROOT(&engine->sched_engine->queue.rb_root)); GEM_BUG_ON(list_empty(&rq->sched.link)); tasklet_hi_schedule(&engine->execlists.tasklet); diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index efa638c3acc7..2c31e07883ba 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -40,7 +40,7 @@ static inline struct i915_priolist *to_priolist(struct rb_node *rb) return rb_entry(rb, struct i915_priolist, node); } -static void assert_priolists(struct intel_engine_execlists * const execlists) +static void assert_priolists(struct i915_sched_engine * const sched_engine) { struct rb_node *rb; long last_prio; @@ -48,11 +48,11 @@ static void assert_priolists(struct intel_engine_execlists * const execlists) if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) return; - GEM_BUG_ON(rb_first_cached(&execlists->queue) != - rb_first(&execlists->queue.rb_root)); + GEM_BUG_ON(rb_first_cached(&sched_engine->queue) != + rb_first(&sched_engine->queue.rb_root)); last_prio = INT_MAX; - for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) { + for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) { const struct i915_priolist *p = to_priolist(rb); GEM_BUG_ON(p->priority > last_prio); @@ -63,21 +63,21 @@ static void assert_priolists(struct intel_engine_execlists * const execlists) struct list_head * i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio) { - struct intel_engine_execlists * const execlists = &engine->execlists; + struct i915_sched_engine * const sched_engine = engine->sched_engine; struct i915_priolist *p; struct rb_node **parent, *rb; bool first = true; lockdep_assert_held(&engine->active.lock); - assert_priolists(execlists); + assert_priolists(sched_engine); - if (unlikely(execlists->no_priolist)) + if (unlikely(sched_engine->no_priolist)) prio = I915_PRIORITY_NORMAL; find_priolist: /* most positive priority is scheduled first, equal priorities fifo */ rb = NULL; - parent = &execlists->queue.rb_root.rb_node; + parent = &sched_engine->queue.rb_root.rb_node; while (*parent) { rb = *parent; p = to_priolist(rb); @@ -92,7 +92,7 @@ find_priolist: } if (prio == I915_PRIORITY_NORMAL) { - p = &execlists->default_priolist; + p = &sched_engine->default_priolist; } else { p = kmem_cache_alloc(global.slab_priorities, GFP_ATOMIC); /* Convert an allocation failure to a priority bump */ @@ -107,7 +107,7 @@ find_priolist: * requests, so if userspace lied about their * dependencies that reordering may be visible. */ - execlists->no_priolist = true; + sched_engine->no_priolist = true; goto find_priolist; } } @@ -116,7 +116,7 @@ find_priolist: INIT_LIST_HEAD(&p->requests); rb_link_node(&p->node, rb, parent); - rb_insert_color_cached(&p->node, &execlists->queue, first); + rb_insert_color_cached(&p->node, &sched_engine->queue, first); return &p->requests; } @@ -184,7 +184,7 @@ static void kick_submission(struct intel_engine_cs *engine, * We only need to kick the tasklet once for the high priority * new context we add into the queue. */ - if (prio <= engine->execlists.queue_priority_hint) + if (prio <= engine->sched_engine->queue_priority_hint) return; rcu_read_lock(); @@ -208,7 +208,7 @@ static void kick_submission(struct intel_engine_cs *engine, inflight->fence.context, inflight->fence.seqno, inflight->sched.attr.priority); - engine->execlists.queue_priority_hint = prio; + engine->sched_engine->queue_priority_hint = prio; if (need_preempt(prio, rq_prio(inflight))) tasklet_hi_schedule(&engine->execlists.tasklet); @@ -489,6 +489,33 @@ void i915_request_show_with_schedule(struct drm_printer *m, rcu_read_unlock(); } +void i915_sched_engine_free(struct kref *kref) +{ + struct i915_sched_engine *sched_engine = + container_of(kref, typeof(*sched_engine), ref); + + kfree(sched_engine); +} + +struct i915_sched_engine * +i915_sched_engine_create(unsigned int subclass) +{ + struct i915_sched_engine *sched_engine; + + sched_engine = kzalloc(sizeof(*sched_engine), GFP_KERNEL); + if (!sched_engine) + return NULL; + + kref_init(&sched_engine->ref); + + sched_engine->queue = RB_ROOT_CACHED; + sched_engine->queue_priority_hint = INT_MIN; + + /* subclass is used in a follow up patch */ + + return sched_engine; +} + static void i915_global_scheduler_shrink(void) { kmem_cache_shrink(global.slab_dependencies); diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h index 858a0938f47a..91a04e34cac5 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.h +++ b/drivers/gpu/drm/i915/i915_scheduler.h @@ -48,6 +48,24 @@ static inline void i915_priolist_free(struct i915_priolist *p) __i915_priolist_free(p); } +struct i915_sched_engine * +i915_sched_engine_create(unsigned int subclass); + +void i915_sched_engine_free(struct kref *kref); + +static inline struct i915_sched_engine * +i915_sched_engine_get(struct i915_sched_engine *sched_engine) +{ + kref_get(&sched_engine->ref); + return sched_engine; +} + +static inline void +i915_sched_engine_put(struct i915_sched_engine *sched_engine) +{ + kref_put(&sched_engine->ref, i915_sched_engine_free); +} + 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 343ed44d5ed4..4a7c9f06b40b 100644 --- a/drivers/gpu/drm/i915/i915_scheduler_types.h +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h @@ -91,4 +91,51 @@ struct i915_dependency { &(rq__)->sched.signalers_list, \ signal_link) +/** + * struct i915_sched_engine - scheduler engine + * + * A schedule engine represents a submission queue with different priority + * bands. It contains all the common state (relative to the backend) to queue, + * track, and submit a request. + * + * This object at the moment is quite i915 specific but will transition into a + * container for the drm_gpu_scheduler plus a few other variables once the i915 + * is integrated with the DRM scheduler. + */ +struct i915_sched_engine { + /** + * @ref: reference count of schedule engine object + */ + struct kref ref; + + /** + * @default_priolist: priority list for I915_PRIORITY_NORMAL + */ + struct i915_priolist default_priolist; + + /** + * @queue_priority_hint: Highest pending priority. + * + * When we add requests into the queue, or adjust the priority of + * executing requests, we compute the maximum priority of those + * pending requests. We can then use this value to determine if + * we need to preempt the executing requests to service the queue. + * However, since the we may have recorded the priority of an inflight + * request we wanted to preempt but since completed, at the time of + * dequeuing the priority hint may no longer may match the highest + * available request priority. + */ + int queue_priority_hint; + + /** + * @queue: queue of requests, in priority lists + */ + struct rb_root_cached queue; + + /** + * @no_priolist: priority lists disabled + */ + bool no_priolist; +}; + #endif /* _I915_SCHEDULER_TYPES_H_ */ |