drm/i915: Store the intel_context_ops in the intel_engine_cs

If we place a pointer to the engine specific intel_context_ops in the
engine itself, we can assign the ops pointer on initialising the
context, and then rely on it being set. This simplifies the code in
later patches.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190308132522.21573-3-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gem_context.c

@@ -356,6 +356,7 @@ intel_context_init(struct intel_context *ce,
 {
 	ce->gem_context = ctx;
 	ce->engine = engine;
+	ce->ops = engine->cops;
 
 	INIT_LIST_HEAD(&ce->signal_link);
 	INIT_LIST_HEAD(&ce->signals);

drivers/gpu/drm/i915/intel_engine_types.h

@@ -351,6 +351,7 @@ struct intel_engine_cs {
 
 	void		(*set_default_submission)(struct intel_engine_cs *engine);
 
+	const struct intel_context_ops *cops;
 	struct intel_context *(*context_pin)(struct intel_engine_cs *engine,
 					     struct i915_gem_context *ctx);
 

drivers/gpu/drm/i915/intel_lrc.c

@@ -1386,11 +1386,6 @@ __execlists_context_pin(struct intel_engine_cs *engine,
 	return ERR_PTR(ret);
 }
 
-static const struct intel_context_ops execlists_context_ops = {
-	.unpin = execlists_context_unpin,
-	.destroy = execlists_context_destroy,
-};
-
 static struct intel_context *
 execlists_context_pin(struct intel_engine_cs *engine,
 		      struct i915_gem_context *ctx)
@@ -1404,11 +1399,14 @@ execlists_context_pin(struct intel_engine_cs *engine,
 		return ce;
 	GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
 
-	ce->ops = &execlists_context_ops;
-
 	return __execlists_context_pin(engine, ctx, ce);
 }
 
+static const struct intel_context_ops execlists_context_ops = {
+	.unpin = execlists_context_unpin,
+	.destroy = execlists_context_destroy,
+};
+
 static int gen8_emit_init_breadcrumb(struct i915_request *rq)
 {
 	u32 *cs;
@@ -2352,6 +2350,7 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine)
 	engine->reset.reset = execlists_reset;
 	engine->reset.finish = execlists_reset_finish;
 
+	engine->cops = &execlists_context_ops;
 	engine->context_pin = execlists_context_pin;
 	engine->request_alloc = execlists_request_alloc;
 

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -1349,7 +1349,7 @@ intel_ring_free(struct intel_ring *ring)
 	kfree(ring);
 }
 
-static void intel_ring_context_destroy(struct intel_context *ce)
+static void ring_context_destroy(struct intel_context *ce)
 {
 	GEM_BUG_ON(ce->pin_count);
 
@@ -1426,7 +1426,7 @@ static void __context_unpin(struct intel_context *ce)
 	i915_vma_unpin(vma);
 }
 
-static void intel_ring_context_unpin(struct intel_context *ce)
+static void ring_context_unpin(struct intel_context *ce)
 {
 	__context_unpin_ppgtt(ce->gem_context);
 	__context_unpin(ce);
@@ -1549,14 +1549,8 @@ __ring_context_pin(struct intel_engine_cs *engine,
 	return ERR_PTR(err);
 }
 
-static const struct intel_context_ops ring_context_ops = {
-	.unpin = intel_ring_context_unpin,
-	.destroy = intel_ring_context_destroy,
-};
-
 static struct intel_context *
-intel_ring_context_pin(struct intel_engine_cs *engine,
-		       struct i915_gem_context *ctx)
+ring_context_pin(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
 {
 	struct intel_context *ce = to_intel_context(ctx, engine);
 
@@ -1566,11 +1560,14 @@ intel_ring_context_pin(struct intel_engine_cs *engine,
 		return ce;
 	GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
 
-	ce->ops = &ring_context_ops;
-
 	return __ring_context_pin(engine, ctx, ce);
 }
 
+static const struct intel_context_ops ring_context_ops = {
+	.unpin = ring_context_unpin,
+	.destroy = ring_context_destroy,
+};
+
 static int intel_init_ring_buffer(struct intel_engine_cs *engine)
 {
 	struct i915_timeline *timeline;
@@ -2276,7 +2273,8 @@ static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv,
 	engine->reset.reset = reset_ring;
 	engine->reset.finish = reset_finish;
 
-	engine->context_pin = intel_ring_context_pin;
+	engine->cops = &ring_context_ops;
+	engine->context_pin = ring_context_pin;
 	engine->request_alloc = ring_request_alloc;
 
 	/*

drivers/gpu/drm/i915/selftests/mock_engine.c

@@ -137,11 +137,6 @@ static void mock_context_destroy(struct intel_context *ce)
 		mock_ring_free(ce->ring);
 }
 
-static const struct intel_context_ops mock_context_ops = {
-	.unpin = mock_context_unpin,
-	.destroy = mock_context_destroy,
-};
-
 static struct intel_context *
 mock_context_pin(struct intel_engine_cs *engine,
 		 struct i915_gem_context *ctx)
@@ -160,8 +155,6 @@ mock_context_pin(struct intel_engine_cs *engine,
 
 	mock_timeline_pin(ce->ring->timeline);
 
-	ce->ops = &mock_context_ops;
-
 	mutex_lock(&ctx->mutex);
 	list_add(&ce->active_link, &ctx->active_engines);
 	mutex_unlock(&ctx->mutex);
@@ -174,6 +167,11 @@ mock_context_pin(struct intel_engine_cs *engine,
 	return ERR_PTR(err);
 }
 
+static const struct intel_context_ops mock_context_ops = {
+	.unpin = mock_context_unpin,
+	.destroy = mock_context_destroy,
+};
+
 static int mock_request_alloc(struct i915_request *request)
 {
 	INIT_LIST_HEAD(&request->mock.link);
@@ -232,6 +230,7 @@ struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
 	engine->base.mask = BIT(id);
 	engine->base.status_page.addr = (void *)(engine + 1);
 
+	engine->base.cops = &mock_context_ops;
 	engine->base.context_pin = mock_context_pin;
 	engine->base.request_alloc = mock_request_alloc;
 	engine->base.emit_flush = mock_emit_flush;