sna/gen6+: Share the common routines for ring preferrence

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 194 insertions, 0 deletions

diff --git a/src/sna/gen6_common.h b/src/sna/gen6_common.h
new file mode 100644
index 00000000..e5d78c07
--- /dev/null
+++ b/src/sna/gen6_common.h
@@ -0,0 +1,194 @@
+/*
+ * Copyright © 2011-2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#ifndef GEN6_COMMON_H
+#define GEN6_COMMON_H
+
+#include "sna.h"
+
+#define NO_RING_SWITCH 0
+#define PREFER_RENDER 0
+
+static inline bool is_uncached(struct sna *sna,
+			       struct kgem_bo *bo)
+{
+	return bo->scanout && !sna->kgem.has_wt;
+}
+
+inline static bool can_switch_to_blt(struct sna *sna,
+				     struct kgem_bo *bo,
+				     unsigned flags)
+{
+	if (sna->kgem.ring != KGEM_RENDER)
+		return true;
+
+	if (NO_RING_SWITCH)
+		return false;
+
+	if (!sna->kgem.has_semaphores)
+		return false;
+
+	if (flags & COPY_LAST)
+		return true;
+
+	if (bo && RQ_IS_BLT(bo->rq))
+		return true;
+
+	return kgem_ring_is_idle(&sna->kgem, KGEM_BLT);
+}
+
+inline static bool can_switch_to_render(struct sna *sna,
+					struct kgem_bo *bo)
+{
+	if (sna->kgem.ring == KGEM_RENDER)
+		return true;
+
+	if (NO_RING_SWITCH)
+		return false;
+
+	if (!sna->kgem.has_semaphores)
+		return false;
+
+	if (bo && !RQ_IS_BLT(bo->rq) && !is_uncached(sna, bo))
+		return true;
+
+	return !kgem_ring_is_idle(&sna->kgem, KGEM_RENDER);
+}
+
+static inline bool untiled_tlb_miss(struct kgem_bo *bo)
+{
+	if (kgem_bo_is_render(bo))
+		return false;
+
+	return bo->tiling == I915_TILING_NONE && bo->pitch >= 4096;
+}
+
+static int prefer_blt_bo(struct sna *sna, struct kgem_bo *bo)
+{
+	if (bo->rq)
+		return RQ_IS_BLT(bo->rq);
+
+	if (sna->flags & SNA_POWERSAVE)
+		return true;
+
+	return bo->tiling == I915_TILING_NONE || is_uncached(sna, bo);
+}
+
+inline static bool force_blt_ring(struct sna *sna)
+{
+	if (sna->flags & SNA_POWERSAVE)
+		return true;
+
+	if (sna->kgem.mode == KGEM_RENDER)
+		return false;
+
+	if (sna->render_state.gt < 2)
+		return true;
+
+	return false;
+}
+
+inline static bool prefer_blt_ring(struct sna *sna,
+				   struct kgem_bo *bo,
+				   unsigned flags)
+{
+	assert(!force_blt_ring(sna));
+	assert(!kgem_bo_is_render(bo));
+
+	return can_switch_to_blt(sna, bo, flags);
+}
+
+inline static bool prefer_render_ring(struct sna *sna,
+				      struct kgem_bo *bo)
+{
+	if (sna->flags & SNA_POWERSAVE)
+		return false;
+
+	if (sna->render_state.gt < 2)
+		return false;
+
+	return can_switch_to_render(sna, bo);
+}
+
+inline static bool
+prefer_blt_composite(struct sna *sna, struct sna_composite_op *tmp)
+{
+	if (untiled_tlb_miss(tmp->dst.bo) ||
+	    untiled_tlb_miss(tmp->src.bo))
+		return true;
+
+	if (force_blt_ring(sna))
+		return true;
+
+	if (kgem_bo_is_render(tmp->dst.bo) ||
+	    kgem_bo_is_render(tmp->src.bo))
+		return false;
+
+	if (prefer_render_ring(sna, tmp->dst.bo))
+		return false;
+
+	if (!prefer_blt_ring(sna, tmp->dst.bo, 0))
+		return false;
+
+	return prefer_blt_bo(sna, tmp->dst.bo) || prefer_blt_bo(sna, tmp->src.bo);
+}
+
+static inline bool prefer_blt_fill(struct sna *sna,
+				   struct kgem_bo *bo,
+				   unsigned flags)
+{
+	if (PREFER_RENDER)
+		return PREFER_RENDER < 0;
+
+	if (flags & (FILL_POINTS | FILL_SPANS) &&
+	    can_switch_to_blt(sna, bo, 0))
+		return true;
+
+	if (untiled_tlb_miss(bo))
+		return true;
+
+	if (force_blt_ring(sna))
+		return true;
+
+	if (kgem_bo_is_render(bo))
+		return false;
+
+	if (prefer_render_ring(sna, bo))
+		return false;
+
+	if (!prefer_blt_ring(sna, bo, 0))
+		return false;
+
+	return prefer_blt_bo(sna, bo);
+}
+
+void gen6_render_flush(struct sna *sna);
+void gen6_render_retire(struct kgem *kgem);
+void gen6_render_expire(struct kgem *kgem);
+void gen6_render_context_switch(struct kgem *kgem, int new_mode);
+
+#endif /* GEN6_COMMON_H */