From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 10 +++++++++- drivers/gpu/drm/amd/scheduler/sched_fence.c | 23 ++++++++++++++++++++++- 2 files changed, 31 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/amd/scheduler') diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c index 8b2becd1a..a5ff9458d 100644 --- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c +++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c @@ -229,6 +229,14 @@ static void amd_sched_entity_wakeup(struct fence *f, struct fence_cb *cb) amd_sched_wakeup(entity->sched); } +static void amd_sched_entity_clear_dep(struct fence *f, struct fence_cb *cb) +{ + struct amd_sched_entity *entity = + container_of(cb, struct amd_sched_entity, cb); + entity->dependency = NULL; + fence_put(f); +} + static bool amd_sched_entity_add_dependency_cb(struct amd_sched_entity *entity) { struct amd_gpu_scheduler *sched = entity->sched; @@ -251,7 +259,7 @@ static bool amd_sched_entity_add_dependency_cb(struct amd_sched_entity *entity) } /* Wait for fence to be scheduled */ - entity->cb.func = amd_sched_entity_wakeup; + entity->cb.func = amd_sched_entity_clear_dep; list_add_tail(&entity->cb.node, &s_fence->scheduled_cb); return true; } diff --git a/drivers/gpu/drm/amd/scheduler/sched_fence.c b/drivers/gpu/drm/amd/scheduler/sched_fence.c index 87c78eece..dc115aea3 100644 --- a/drivers/gpu/drm/amd/scheduler/sched_fence.c +++ b/drivers/gpu/drm/amd/scheduler/sched_fence.c @@ -84,12 +84,33 @@ static bool amd_sched_fence_enable_signaling(struct fence *f) return true; } -static void amd_sched_fence_release(struct fence *f) +/** + * amd_sched_fence_free - free up the fence memory + * + * @rcu: RCU callback head + * + * Free up the fence memory after the RCU grace period. + */ +static void amd_sched_fence_free(struct rcu_head *rcu) { + struct fence *f = container_of(rcu, struct fence, rcu); struct amd_sched_fence *fence = to_amd_sched_fence(f); kmem_cache_free(sched_fence_slab, fence); } +/** + * amd_sched_fence_release - callback that fence can be freed + * + * @fence: fence + * + * This function is called when the reference count becomes zero. + * It just RCU schedules freeing up the fence. + */ +static void amd_sched_fence_release(struct fence *f) +{ + call_rcu(&f->rcu, amd_sched_fence_free); +} + const struct fence_ops amd_sched_fence_ops = { .get_driver_name = amd_sched_fence_get_driver_name, .get_timeline_name = amd_sched_fence_get_timeline_name, -- cgit v1.2.3-54-g00ecf