diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_scheduler.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scheduler.c | 255 |
1 files changed, 134 insertions, 121 deletions
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index 39bc4f54e272..108f52e1bf35 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -35,109 +35,6 @@ static inline bool node_signaled(const struct i915_sched_node *node) return i915_request_completed(node_to_request(node)); } -void i915_sched_node_init(struct i915_sched_node *node) -{ - INIT_LIST_HEAD(&node->signalers_list); - INIT_LIST_HEAD(&node->waiters_list); - INIT_LIST_HEAD(&node->link); - node->attr.priority = I915_PRIORITY_INVALID; - node->semaphores = 0; - node->flags = 0; -} - -static struct i915_dependency * -i915_dependency_alloc(void) -{ - return kmem_cache_alloc(global.slab_dependencies, GFP_KERNEL); -} - -static void -i915_dependency_free(struct i915_dependency *dep) -{ - kmem_cache_free(global.slab_dependencies, dep); -} - -bool __i915_sched_node_add_dependency(struct i915_sched_node *node, - struct i915_sched_node *signal, - struct i915_dependency *dep, - unsigned long flags) -{ - bool ret = false; - - spin_lock_irq(&schedule_lock); - - if (!node_signaled(signal)) { - INIT_LIST_HEAD(&dep->dfs_link); - list_add(&dep->wait_link, &signal->waiters_list); - list_add(&dep->signal_link, &node->signalers_list); - dep->signaler = signal; - dep->flags = flags; - - /* Keep track of whether anyone on this chain has a semaphore */ - if (signal->flags & I915_SCHED_HAS_SEMAPHORE_CHAIN && - !node_started(signal)) - node->flags |= I915_SCHED_HAS_SEMAPHORE_CHAIN; - - ret = true; - } - - spin_unlock_irq(&schedule_lock); - - return ret; -} - -int i915_sched_node_add_dependency(struct i915_sched_node *node, - struct i915_sched_node *signal) -{ - struct i915_dependency *dep; - - dep = i915_dependency_alloc(); - if (!dep) - return -ENOMEM; - - if (!__i915_sched_node_add_dependency(node, signal, dep, - I915_DEPENDENCY_ALLOC)) - i915_dependency_free(dep); - - return 0; -} - -void i915_sched_node_fini(struct i915_sched_node *node) -{ - struct i915_dependency *dep, *tmp; - - GEM_BUG_ON(!list_empty(&node->link)); - - spin_lock_irq(&schedule_lock); - - /* - * Everyone we depended upon (the fences we wait to be signaled) - * should retire before us and remove themselves from our list. - * However, retirement is run independently on each timeline and - * so we may be called out-of-order. - */ - list_for_each_entry_safe(dep, tmp, &node->signalers_list, signal_link) { - GEM_BUG_ON(!node_signaled(dep->signaler)); - GEM_BUG_ON(!list_empty(&dep->dfs_link)); - - list_del(&dep->wait_link); - if (dep->flags & I915_DEPENDENCY_ALLOC) - i915_dependency_free(dep); - } - - /* Remove ourselves from everyone who depends upon us */ - list_for_each_entry_safe(dep, tmp, &node->waiters_list, wait_link) { - GEM_BUG_ON(dep->signaler != node); - GEM_BUG_ON(!list_empty(&dep->dfs_link)); - - list_del(&dep->signal_link); - if (dep->flags & I915_DEPENDENCY_ALLOC) - i915_dependency_free(dep); - } - - spin_unlock_irq(&schedule_lock); -} - static inline struct i915_priolist *to_priolist(struct rb_node *rb) { return rb_entry(rb, struct i915_priolist, node); @@ -239,6 +136,11 @@ out: return &p->requests[idx]; } +void __i915_priolist_free(struct i915_priolist *p) +{ + kmem_cache_free(global.slab_priorities, p); +} + struct sched_cache { struct list_head *priolist; }; @@ -273,7 +175,7 @@ static bool inflight(const struct i915_request *rq, return active->hw_context == rq->hw_context; } -static void __i915_schedule(struct i915_request *rq, +static void __i915_schedule(struct i915_sched_node *node, const struct i915_sched_attr *attr) { struct intel_engine_cs *engine; @@ -287,13 +189,13 @@ static void __i915_schedule(struct i915_request *rq, lockdep_assert_held(&schedule_lock); GEM_BUG_ON(prio == I915_PRIORITY_INVALID); - if (i915_request_completed(rq)) + if (node_signaled(node)) return; - if (prio <= READ_ONCE(rq->sched.attr.priority)) + if (prio <= READ_ONCE(node->attr.priority)) return; - stack.signaler = &rq->sched; + stack.signaler = node; list_add(&stack.dfs_link, &dfs); /* @@ -344,9 +246,9 @@ static void __i915_schedule(struct i915_request *rq, * execlists_submit_request()), we can set our own priority and skip * acquiring the engine locks. */ - if (rq->sched.attr.priority == I915_PRIORITY_INVALID) { - GEM_BUG_ON(!list_empty(&rq->sched.link)); - rq->sched.attr = *attr; + if (node->attr.priority == I915_PRIORITY_INVALID) { + GEM_BUG_ON(!list_empty(&node->link)); + node->attr = *attr; if (stack.dfs_link.next == stack.dfs_link.prev) return; @@ -355,15 +257,14 @@ static void __i915_schedule(struct i915_request *rq, } memset(&cache, 0, sizeof(cache)); - engine = rq->engine; + engine = node_to_request(node)->engine; spin_lock(&engine->timeline.lock); /* Fifo and depth-first replacement ensure our deps execute before us */ list_for_each_entry_safe_reverse(dep, p, &dfs, dfs_link) { - struct i915_sched_node *node = dep->signaler; - INIT_LIST_HEAD(&dep->dfs_link); + node = dep->signaler; engine = sched_lock_engine(node, engine, &cache); lockdep_assert_held(&engine->timeline.lock); @@ -413,13 +314,20 @@ static void __i915_schedule(struct i915_request *rq, void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr) { spin_lock_irq(&schedule_lock); - __i915_schedule(rq, attr); + __i915_schedule(&rq->sched, attr); spin_unlock_irq(&schedule_lock); } +static void __bump_priority(struct i915_sched_node *node, unsigned int bump) +{ + struct i915_sched_attr attr = node->attr; + + attr.priority |= bump; + __i915_schedule(node, &attr); +} + void i915_schedule_bump_priority(struct i915_request *rq, unsigned int bump) { - struct i915_sched_attr attr; unsigned long flags; GEM_BUG_ON(bump & ~I915_PRIORITY_MASK); @@ -428,17 +336,122 @@ void i915_schedule_bump_priority(struct i915_request *rq, unsigned int bump) return; spin_lock_irqsave(&schedule_lock, flags); + __bump_priority(&rq->sched, bump); + spin_unlock_irqrestore(&schedule_lock, flags); +} - attr = rq->sched.attr; - attr.priority |= bump; - __i915_schedule(rq, &attr); +void i915_sched_node_init(struct i915_sched_node *node) +{ + INIT_LIST_HEAD(&node->signalers_list); + INIT_LIST_HEAD(&node->waiters_list); + INIT_LIST_HEAD(&node->link); + node->attr.priority = I915_PRIORITY_INVALID; + node->semaphores = 0; + node->flags = 0; +} - spin_unlock_irqrestore(&schedule_lock, flags); +static struct i915_dependency * +i915_dependency_alloc(void) +{ + return kmem_cache_alloc(global.slab_dependencies, GFP_KERNEL); } -void __i915_priolist_free(struct i915_priolist *p) +static void +i915_dependency_free(struct i915_dependency *dep) { - kmem_cache_free(global.slab_priorities, p); + kmem_cache_free(global.slab_dependencies, dep); +} + +bool __i915_sched_node_add_dependency(struct i915_sched_node *node, + struct i915_sched_node *signal, + struct i915_dependency *dep, + unsigned long flags) +{ + bool ret = false; + + spin_lock_irq(&schedule_lock); + + if (!node_signaled(signal)) { + INIT_LIST_HEAD(&dep->dfs_link); + list_add(&dep->wait_link, &signal->waiters_list); + list_add(&dep->signal_link, &node->signalers_list); + dep->signaler = signal; + dep->flags = flags; + + /* Keep track of whether anyone on this chain has a semaphore */ + if (signal->flags & I915_SCHED_HAS_SEMAPHORE_CHAIN && + !node_started(signal)) + node->flags |= I915_SCHED_HAS_SEMAPHORE_CHAIN; + + /* + * As we do not allow WAIT to preempt inflight requests, + * once we have executed a request, along with triggering + * any execution callbacks, we must preserve its ordering + * within the non-preemptible FIFO. + */ + BUILD_BUG_ON(__NO_PREEMPTION & ~I915_PRIORITY_MASK); + if (flags & I915_DEPENDENCY_EXTERNAL) + __bump_priority(signal, __NO_PREEMPTION); + + ret = true; + } + + spin_unlock_irq(&schedule_lock); + + return ret; +} + +int i915_sched_node_add_dependency(struct i915_sched_node *node, + struct i915_sched_node *signal) +{ + struct i915_dependency *dep; + + dep = i915_dependency_alloc(); + if (!dep) + return -ENOMEM; + + if (!__i915_sched_node_add_dependency(node, signal, dep, + I915_DEPENDENCY_EXTERNAL | + I915_DEPENDENCY_ALLOC)) + i915_dependency_free(dep); + + return 0; +} + +void i915_sched_node_fini(struct i915_sched_node *node) +{ + struct i915_dependency *dep, *tmp; + + GEM_BUG_ON(!list_empty(&node->link)); + + spin_lock_irq(&schedule_lock); + + /* + * Everyone we depended upon (the fences we wait to be signaled) + * should retire before us and remove themselves from our list. + * However, retirement is run independently on each timeline and + * so we may be called out-of-order. + */ + list_for_each_entry_safe(dep, tmp, &node->signalers_list, signal_link) { + GEM_BUG_ON(!node_signaled(dep->signaler)); + GEM_BUG_ON(!list_empty(&dep->dfs_link)); + + list_del(&dep->wait_link); + if (dep->flags & I915_DEPENDENCY_ALLOC) + i915_dependency_free(dep); + } + + /* Remove ourselves from everyone who depends upon us */ + list_for_each_entry_safe(dep, tmp, &node->waiters_list, wait_link) { + GEM_BUG_ON(dep->signaler != node); + GEM_BUG_ON(!list_empty(&dep->dfs_link)); + + list_del(&dep->signal_link); + if (dep->flags & I915_DEPENDENCY_ALLOC) + i915_dependency_free(dep); + } + + spin_unlock_irq(&schedule_lock); } static void i915_global_scheduler_shrink(void) |