The timeline is strictly ordered, so by inserting the timeline->barrier
request into the timeline->last_request it naturally provides the same
barrier. Consolidate the pair of barriers into one as they serve the
same purpose.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_context.c | 13 ++-----------
drivers/gpu/drm/i915/i915_request.c | 9 ---------
drivers/gpu/drm/i915/i915_timeline.c | 2 --
drivers/gpu/drm/i915/i915_timeline.h | 15 ---------------
drivers/gpu/drm/i915/i915_timeline_types.h | 10 ----------
drivers/gpu/drm/i915/selftests/mock_timeline.c | 1 -
6 files changed, 2 insertions(+), 48 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 66b6852cb4d2..7fc34ab6df87 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -1167,7 +1167,7 @@ static int
gen8_modify_rpcs(struct intel_context *ce, struct intel_sseu sseu)
{
struct drm_i915_private *i915 = ce->engine->i915;
- struct i915_request *rq, *prev;
+ struct i915_request *rq;
intel_wakeref_t wakeref;
int ret;
@@ -1192,16 +1192,7 @@ gen8_modify_rpcs(struct intel_context *ce, struct intel_sseu sseu)
}
/* Queue this switch after all other activity by this context. */
- prev = i915_active_request_raw(&ce->ring->timeline->last_request,
- &i915->drm.struct_mutex);
- if (prev && !i915_request_completed(prev)) {
- ret = i915_request_await_dma_fence(rq, &prev->fence);
- if (ret < 0)
- goto out_add;
- }
-
- /* Order all following requests to be after. */
- ret = i915_timeline_set_barrier(ce->ring->timeline, rq);
+ ret = i915_active_request_set(&ce->ring->timeline->last_request, rq);
if (ret)
goto out_add;
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 2da0d6436a1a..96a9e8bcd805 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -584,11 +584,6 @@ i915_request_alloc_slow(struct intel_context *ce)
return kmem_cache_alloc(global.slab_requests, GFP_KERNEL);
}
-static int add_timeline_barrier(struct i915_request *rq)
-{
- return i915_request_await_active_request(rq, &rq->timeline->barrier);
-}
-
/**
* i915_request_alloc - allocate a request structure
*
@@ -738,10 +733,6 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
*/
rq->head = rq->ring->emit;
- ret = add_timeline_barrier(rq);
- if (ret)
- goto err_unwind;
-
ret = engine->request_alloc(rq);
if (ret)
goto err_unwind;
diff --git a/drivers/gpu/drm/i915/i915_timeline.c b/drivers/gpu/drm/i915/i915_timeline.c
index 2f4907364920..5fbea0892f33 100644
--- a/drivers/gpu/drm/i915/i915_timeline.c
+++ b/drivers/gpu/drm/i915/i915_timeline.c
@@ -253,7 +253,6 @@ int i915_timeline_init(struct drm_i915_private *i915,
spin_lock_init(&timeline->lock);
mutex_init(&timeline->mutex);
- INIT_ACTIVE_REQUEST(&timeline->barrier);
INIT_ACTIVE_REQUEST(&timeline->last_request);
INIT_LIST_HEAD(&timeline->requests);
@@ -326,7 +325,6 @@ void i915_timeline_fini(struct i915_timeline *timeline)
{
GEM_BUG_ON(timeline->pin_count);
GEM_BUG_ON(!list_empty(&timeline->requests));
- GEM_BUG_ON(i915_active_request_isset(&timeline->barrier));
i915_syncmap_free(&timeline->sync);
diff --git a/drivers/gpu/drm/i915/i915_timeline.h b/drivers/gpu/drm/i915/i915_timeline.h
index 4ca7f80bdf6d..27668a1a69a3 100644
--- a/drivers/gpu/drm/i915/i915_timeline.h
+++ b/drivers/gpu/drm/i915/i915_timeline.h
@@ -110,19 +110,4 @@ void i915_timelines_init(struct drm_i915_private *i915);
void i915_timelines_park(struct drm_i915_private *i915);
void i915_timelines_fini(struct drm_i915_private *i915);
-/**
- * i915_timeline_set_barrier - orders submission between different timelines
- * @timeline: timeline to set the barrier on
- * @rq: request after which new submissions can proceed
- *
- * Sets the passed in request as the serialization point for all subsequent
- * submissions on @timeline. Subsequent requests will not be submitted to GPU
- * until the barrier has been completed.
- */
-static inline int
-i915_timeline_set_barrier(struct i915_timeline *tl, struct i915_request *rq)
-{
- return i915_active_request_set(&tl->barrier, rq);
-}
-
#endif
diff --git a/drivers/gpu/drm/i915/i915_timeline_types.h b/drivers/gpu/drm/i915/i915_timeline_types.h
index 1f5b55d9ffb5..5256a0b5c5f7 100644
--- a/drivers/gpu/drm/i915/i915_timeline_types.h
+++ b/drivers/gpu/drm/i915/i915_timeline_types.h
@@ -61,16 +61,6 @@ struct i915_timeline {
*/
struct i915_syncmap *sync;
- /**
- * Barrier provides the ability to serialize ordering between different
- * timelines.
- *
- * Users can call i915_timeline_set_barrier which will make all
- * subsequent submissions to this timeline be executed only after the
- * barrier has been completed.
- */
- struct i915_active_request barrier;
-
struct list_head link;
struct drm_i915_private *i915;
diff --git a/drivers/gpu/drm/i915/selftests/mock_timeline.c b/drivers/gpu/drm/i915/selftests/mock_timeline.c
index 416d85233263..e084476469ef 100644
--- a/drivers/gpu/drm/i915/selftests/mock_timeline.c
+++ b/drivers/gpu/drm/i915/selftests/mock_timeline.c
@@ -16,7 +16,6 @@ void mock_timeline_init(struct i915_timeline *timeline, u64 context)
spin_lock_init(&timeline->lock);
mutex_init(&timeline->mutex);
- INIT_ACTIVE_REQUEST(&timeline->barrier);
INIT_ACTIVE_REQUEST(&timeline->last_request);
INIT_LIST_HEAD(&timeline->requests);
