Mesa (master): panfrost: Do fine-grained flushing for occlusion query results

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Module: Mesa
Branch: master
Commit: 3e3958c44f78e882468a092557ec6b0b1404bc54
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3e3958c44f78e882468a092557ec6b0b1404bc54

Author: Icecream95 <ixn at keemail.me>
Date:   Sun Jun 28 20:48:36 2020 +1200

panfrost: Do fine-grained flushing for occlusion query results

This allows doing occlusion queries in one frame and getting the
results in the next frame without having to flush.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5676>

---

 src/gallium/drivers/panfrost/pan_cmdstream.c | 9 +++++++--
 src/gallium/drivers/panfrost/pan_context.c   | 3 ++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index 841e89d75a0..c1267b43f02 100644
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -134,10 +134,15 @@ panfrost_vt_update_occlusion_query(struct panfrost_context *ctx,
                                    struct mali_vertex_tiler_postfix *postfix)
 {
         SET_BIT(postfix->gl_enables, MALI_OCCLUSION_QUERY, ctx->occlusion_query);
-        if (ctx->occlusion_query)
+        if (ctx->occlusion_query) {
                 postfix->occlusion_counter = ctx->occlusion_query->bo->gpu;
-        else
+                panfrost_batch_add_bo(ctx->batch, ctx->occlusion_query->bo,
+                                      PAN_BO_ACCESS_SHARED |
+                                      PAN_BO_ACCESS_RW |
+                                      PAN_BO_ACCESS_FRAGMENT);
+        } else {
                 postfix->occlusion_counter = 0;
+        }
 }
 
 void
diff --git a/src/gallium/drivers/panfrost/pan_context.c b/src/gallium/drivers/panfrost/pan_context.c
index 2ec636e1579..69f05e5beab 100644
--- a/src/gallium/drivers/panfrost/pan_context.c
+++ b/src/gallium/drivers/panfrost/pan_context.c
@@ -1327,7 +1327,8 @@ panfrost_get_query_result(struct pipe_context *pipe,
         case PIPE_QUERY_OCCLUSION_PREDICATE:
         case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
                 DBG("Flushing for occlusion query\n");
-                panfrost_flush_all_batches(ctx, true);
+                panfrost_flush_batches_accessing_bo(ctx, query->bo, PAN_BO_ACCESS_WRITE);
+                panfrost_bo_wait(query->bo, INT64_MAX, PAN_BO_ACCESS_WRITE);
 
                 /* Read back the query results */
                 unsigned *result = (unsigned *) query->bo->cpu;