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authorAndrey Grodzovsky <andrey.grodzovsky@amd.com>2018-12-05 22:21:28 +0300
committerAlex Deucher <alexander.deucher@amd.com>2019-01-26 00:15:36 +0300
commit3741540e04137256df82105bcd720a5e27423c34 (patch)
treed2ce4f3e44efa27f84385859b812b8a74aba7c51 /drivers/gpu/drm/scheduler
parent222b5f044159877504dbac9bc1910f89a74136e2 (diff)
downloadlinux-3741540e04137256df82105bcd720a5e27423c34.tar.xz
drm/sched: Rework HW fence processing.
Expedite job deletion from ring mirror list to the HW fence signal callback instead from finish_work, together with waiting for all such fences to signal in drm_sched_stop we garantee that already signaled job will not be processed twice. Remove the sched finish fence callback and just submit finish_work directly from the HW fence callback. v2: Fix comments. v3: Attach hw fence cb to sched_job v5: Rebase Suggested-by: Christian Koenig <Christian.Koenig@amd.com> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/scheduler')
-rw-r--r--drivers/gpu/drm/scheduler/sched_main.c55
1 files changed, 27 insertions, 28 deletions
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 4bb18511ac75..19fc601c9eeb 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -284,8 +284,6 @@ static void drm_sched_job_finish(struct work_struct *work)
cancel_delayed_work_sync(&sched->work_tdr);
spin_lock_irqsave(&sched->job_list_lock, flags);
- /* remove job from ring_mirror_list */
- list_del_init(&s_job->node);
/* queue TDR for next job */
drm_sched_start_timeout(sched);
spin_unlock_irqrestore(&sched->job_list_lock, flags);
@@ -293,22 +291,11 @@ static void drm_sched_job_finish(struct work_struct *work)
sched->ops->free_job(s_job);
}
-static void drm_sched_job_finish_cb(struct dma_fence *f,
- struct dma_fence_cb *cb)
-{
- struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
- finish_cb);
- schedule_work(&job->finish_work);
-}
-
static void drm_sched_job_begin(struct drm_sched_job *s_job)
{
struct drm_gpu_scheduler *sched = s_job->sched;
unsigned long flags;
- dma_fence_add_callback(&s_job->s_fence->finished, &s_job->finish_cb,
- drm_sched_job_finish_cb);
-
spin_lock_irqsave(&sched->job_list_lock, flags);
list_add_tail(&s_job->node, &sched->ring_mirror_list);
drm_sched_start_timeout(sched);
@@ -403,7 +390,7 @@ void drm_sched_stop(struct drm_gpu_scheduler *sched)
list_for_each_entry_reverse(s_job, &sched->ring_mirror_list, node) {
if (s_job->s_fence->parent &&
dma_fence_remove_callback(s_job->s_fence->parent,
- &s_job->s_fence->cb)) {
+ &s_job->cb)) {
dma_fence_put(s_job->s_fence->parent);
s_job->s_fence->parent = NULL;
atomic_dec(&sched->hw_rq_count);
@@ -431,31 +418,34 @@ EXPORT_SYMBOL(drm_sched_stop);
void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
{
struct drm_sched_job *s_job, *tmp;
- unsigned long flags;
int r;
if (!full_recovery)
goto unpark;
- spin_lock_irqsave(&sched->job_list_lock, flags);
+ /*
+ * Locking the list is not required here as the sched thread is parked
+ * so no new jobs are being pushed in to HW and in drm_sched_stop we
+ * flushed all the jobs who were still in mirror list but who already
+ * signaled and removed them self from the list. Also concurrent
+ * GPU recovers can't run in parallel.
+ */
list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, node) {
- struct drm_sched_fence *s_fence = s_job->s_fence;
struct dma_fence *fence = s_job->s_fence->parent;
if (fence) {
- r = dma_fence_add_callback(fence, &s_fence->cb,
+ r = dma_fence_add_callback(fence, &s_job->cb,
drm_sched_process_job);
if (r == -ENOENT)
- drm_sched_process_job(fence, &s_fence->cb);
+ drm_sched_process_job(fence, &s_job->cb);
else if (r)
DRM_ERROR("fence add callback failed (%d)\n",
r);
} else
- drm_sched_process_job(NULL, &s_fence->cb);
+ drm_sched_process_job(NULL, &s_job->cb);
}
drm_sched_start_timeout(sched);
- spin_unlock_irqrestore(&sched->job_list_lock, flags);
unpark:
kthread_unpark(sched->thread);
@@ -604,18 +594,27 @@ drm_sched_select_entity(struct drm_gpu_scheduler *sched)
*/
static void drm_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb)
{
- struct drm_sched_fence *s_fence =
- container_of(cb, struct drm_sched_fence, cb);
+ struct drm_sched_job *s_job = container_of(cb, struct drm_sched_job, cb);
+ struct drm_sched_fence *s_fence = s_job->s_fence;
struct drm_gpu_scheduler *sched = s_fence->sched;
+ unsigned long flags;
+
+ cancel_delayed_work(&sched->work_tdr);
- dma_fence_get(&s_fence->finished);
atomic_dec(&sched->hw_rq_count);
atomic_dec(&sched->num_jobs);
+
+ spin_lock_irqsave(&sched->job_list_lock, flags);
+ /* remove job from ring_mirror_list */
+ list_del_init(&s_job->node);
+ spin_unlock_irqrestore(&sched->job_list_lock, flags);
+
drm_sched_fence_finished(s_fence);
trace_drm_sched_process_job(s_fence);
- dma_fence_put(&s_fence->finished);
wake_up_interruptible(&sched->wake_up_worker);
+
+ schedule_work(&s_job->finish_work);
}
/**
@@ -678,16 +677,16 @@ static int drm_sched_main(void *param)
if (fence) {
s_fence->parent = dma_fence_get(fence);
- r = dma_fence_add_callback(fence, &s_fence->cb,
+ r = dma_fence_add_callback(fence, &sched_job->cb,
drm_sched_process_job);
if (r == -ENOENT)
- drm_sched_process_job(fence, &s_fence->cb);
+ drm_sched_process_job(fence, &sched_job->cb);
else if (r)
DRM_ERROR("fence add callback failed (%d)\n",
r);
dma_fence_put(fence);
} else
- drm_sched_process_job(NULL, &s_fence->cb);
+ drm_sched_process_job(NULL, &sched_job->cb);
wake_up(&sched->job_scheduled);
}