drm/i915: Cache request pointer in *_submission_final()

Keep a local copy of the request pointer in the _final() functions
rather than dereferencing the params block repeatedly.

v3: New patch in series.

v6: Updated to newer nightly (lots of ring -> engine renaming).

For: VIZ-1587
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>

2 files changed, 15 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index c682982676f9..b77d554f41d2 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1295,6 +1295,7 @@ i915_gem_ringbuffer_submission(struct i915_execbuffer_params *params,
 int i915_gem_ringbuffer_submission_final(struct i915_execbuffer_params *params)
 {
 	struct drm_i915_private *dev_priv = to_i915(params->dev);
+	struct drm_i915_gem_request *req = params->request;
 	struct intel_engine_cs  *engine = params->engine;
 	u64 exec_start, exec_len;
 	int ret;
@@ -1306,12 +1307,12 @@ int i915_gem_ringbuffer_submission_final(struct i915_execbuffer_params *params)
 	 * Unconditionally invalidate gpu caches and ensure that we do flush
 	 * any residual writes from the previous batch.
 	 */
-	ret = intel_ring_invalidate_all_caches(params->request);
+	ret = intel_ring_invalidate_all_caches(req);
 	if (ret)
 		return ret;
 
 	/* Switch to the correct context for the batch */
-	ret = i915_switch_context(params->request);
+	ret = i915_switch_context(req);
 	if (ret)
 		return ret;
 
@@ -1320,7 +1321,7 @@ int i915_gem_ringbuffer_submission_final(struct i915_execbuffer_params *params)
 
 	if (engine == &dev_priv->engine[RCS] &&
 	    params->instp_mode != dev_priv->relative_constants_mode) {
-		ret = intel_ring_begin(params->request, 4);
+		ret = intel_ring_begin(req, 4);
 		if (ret)
 			return ret;
 
@@ -1334,7 +1335,7 @@ int i915_gem_ringbuffer_submission_final(struct i915_execbuffer_params *params)
 	}
 
 	if (params->args_flags & I915_EXEC_GEN7_SOL_RESET) {
-		ret = i915_reset_gen7_sol_offsets(params->dev, params->request);
+		ret = i915_reset_gen7_sol_offsets(params->dev, req);
 		if (ret)
 			return ret;
 	}
@@ -1346,13 +1347,13 @@ int i915_gem_ringbuffer_submission_final(struct i915_execbuffer_params *params)
 	if (exec_len == 0)
 		exec_len = params->batch_obj->base.size;
 
-	ret = engine->dispatch_execbuffer(params->request,
-					exec_start, exec_len,
-					params->dispatch_flags);
+	ret = engine->dispatch_execbuffer(req,
+					  exec_start, exec_len,
+					  params->dispatch_flags);
 	if (ret)
 		return ret;
 
-	trace_i915_gem_ring_dispatch(params->request, params->dispatch_flags);
+	trace_i915_gem_ring_dispatch(req, params->dispatch_flags);
 
 	i915_gem_execbuffer_retire_commands(params);
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 6ac063d71bc3..69df9487c30b 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1005,7 +1005,8 @@ int intel_execlists_submission(struct i915_execbuffer_params *params,
 int intel_execlists_submission_final(struct i915_execbuffer_params *params)
 {
 	struct drm_i915_private *dev_priv = to_i915(params->dev);
-	struct intel_ringbuffer *ringbuf = params->request->ringbuf;
+	struct drm_i915_gem_request *req = params->request;
+	struct intel_ringbuffer *ringbuf = req->ringbuf;
 	struct intel_engine_cs *engine = params->engine;
 	u64 exec_start;
 	int ret;
@@ -1017,13 +1018,13 @@ int intel_execlists_submission_final(struct i915_execbuffer_params *params)
 	 * Unconditionally invalidate gpu caches and ensure that we do flush
 	 * any residual writes from the previous batch.
 	 */
-	ret = logical_ring_invalidate_all_caches(params->request);
+	ret = logical_ring_invalidate_all_caches(req);
 	if (ret)
 		return ret;
 
 	if (engine == &dev_priv->engine[RCS] &&
 	    params->instp_mode != dev_priv->relative_constants_mode) {
-		ret = intel_logical_ring_begin(params->request, 4);
+		ret = intel_logical_ring_begin(req, 4);
 		if (ret)
 			return ret;
 
@@ -1039,11 +1040,11 @@ int intel_execlists_submission_final(struct i915_execbuffer_params *params)
 	exec_start = params->batch_obj_vm_offset +
 		     params->args_batch_start_offset;
 
-	ret = engine->emit_bb_start(params->request, exec_start, params->dispatch_flags);
+	ret = engine->emit_bb_start(req, exec_start, params->dispatch_flags);
 	if (ret)
 		return ret;
 
-	trace_i915_gem_ring_dispatch(params->request, params->dispatch_flags);
+	trace_i915_gem_ring_dispatch(req, params->dispatch_flags);
 
 	i915_gem_execbuffer_retire_commands(params);