drm/i915: Push EMIT_INVALIDATE at request start to backends

Move the common engine->emit_flush(EMIT_INVALIDATE) back to the backends
(where it was once previously) as we seek to specialise it in future
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/20181207090213.14352-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index ca95ab2..8ab8e8e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -719,11 +719,6 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
         */
        rq->head = rq->ring->emit;
 
-       /* Unconditionally invalidate GPU caches and TLBs. */
-       ret = engine->emit_flush(rq, EMIT_INVALIDATE);
-       if (ret)
-               goto err_unwind;
-
        ret = engine->request_alloc(rq);
        if (ret)
                goto err_unwind;

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 3a47a47..a9084a5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1276,17 +1276,20 @@ static int execlists_request_alloc(struct i915_request *request)
 
        GEM_BUG_ON(!request->hw_context->pin_count);
 
-       /* Flush enough space to reduce the likelihood of waiting after
+       /*
+        * Flush enough space to reduce the likelihood of waiting after
         * we start building the request - in which case we will just
         * have to repeat work.
         */
        request->reserved_space += EXECLISTS_REQUEST_SIZE;
 
-       ret = intel_ring_wait_for_space(request->ring, request->reserved_space);
+       /* Unconditionally invalidate GPU caches and TLBs. */
+       ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
        if (ret)
                return ret;
 
-       /* Note that after this point, we have committed to using
+       /*
+        * Note that after this point, we have committed to using
         * this request as it is being used to both track the
         * state of engine initialisation and liveness of the
         * golden renderstate above. Think twice before you try

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index c5eb26a..1608474 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1820,13 +1820,15 @@ static int ring_request_alloc(struct i915_request *request)
 
        GEM_BUG_ON(!request->hw_context->pin_count);
 
-       /* Flush enough space to reduce the likelihood of waiting after
+       /*
+        * Flush enough space to reduce the likelihood of waiting after
         * we start building the request - in which case we will just
         * have to repeat work.
         */
        request->reserved_space += LEGACY_REQUEST_SIZE;
 
-       ret = intel_ring_wait_for_space(request->ring, request->reserved_space);
+       /* Unconditionally invalidate GPU caches and TLBs. */
+       ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
        if (ret)
                return ret;