drm/i915: Drop unneed i915 parameter from intel_ring_pin()

As we now have a ring->vma available, we can just lookup our i915
pointer from inside the vm, and so not require the unsightly parameter.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180727155501.18963-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_lrc.c

@@ -1331,7 +1331,7 @@ __execlists_context_pin(struct intel_engine_cs *engine,
 		goto unpin_vma;
 	}
 
-	ret = intel_ring_pin(ce->ring, ctx->i915);
+	ret = intel_ring_pin(ce->ring);
 	if (ret)
 		goto unpin_map;
 

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -1003,10 +1003,11 @@ i915_emit_bb_start(struct i915_request *rq,
 	return 0;
 }
 
-int intel_ring_pin(struct intel_ring *ring, struct drm_i915_private *i915)
+int intel_ring_pin(struct intel_ring *ring)
 {
-	enum i915_map_type map = HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
 	struct i915_vma *vma = ring->vma;
+	enum i915_map_type map =
+		HAS_LLC(vma->vm->i915) ? I915_MAP_WB : I915_MAP_WC;
 	unsigned int flags;
 	void *addr;
 	int ret;
@@ -1405,7 +1406,7 @@ static int intel_init_ring_buffer(struct intel_engine_cs *engine)
 		goto err;
 	}
 
-	err = intel_ring_pin(ring, engine->i915);
+	err = intel_ring_pin(ring);
 	if (err)
 		goto err_ring;
 

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -797,7 +797,7 @@ struct intel_ring *
 intel_engine_create_ring(struct intel_engine_cs *engine,
 			 struct i915_timeline *timeline,
 			 int size);
-int intel_ring_pin(struct intel_ring *ring, struct drm_i915_private *i915);
+int intel_ring_pin(struct intel_ring *ring);
 void intel_ring_reset(struct intel_ring *ring, u32 tail);
 unsigned int intel_ring_update_space(struct intel_ring *ring);
 void intel_ring_unpin(struct intel_ring *ring);