freedreno: add basic query support

Add for now some simple/basic query support (ie. things not actually
requiring the GPU).  Might change around a bit when I actually add
GPU queries, but for now this enables some useful performance info
in the GALLIUM_HUD.  For example:

  GALLIUM_HUD=fps+batches+batches-sysmem+batches-gmem+restores,draw-calls

The driver specific specific queries are:

  + draw-calls
  + batches - number of batches per second, sum of batches-sysmem
    plus batches-gmem
  + batches-gmem - render a set of tiles in GMEM, for each tile
    (optionally) system mem -> gmem (restore), plus N draws,
    plus gmem -> system mem (resolve) per second
  + batches-sysmem - N draws to system memory (GMEM bypass) per
    second
  + restores - number of GMEM batches that required restore per
    second

Ideally for GMEM rendering, you want batches-gmem to equal fps.  If
the app is doing something that triggers multiple passes (ie. requires
extra round trip gmem <-> system memory) then the # of batches per
second will go up relative to fps.

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_context.h b/src/gallium/drivers/freedreno/freedreno_context.h
index 5373de6c638..0871efc53c7 100644
--- a/src/gallium/drivers/freedreno/freedreno_context.h
+++ b/src/gallium/drivers/freedreno/freedreno_context.h
@@ -134,7 +134,15 @@ struct fd_context {
 		FD_GMEM_BLEND_ENABLED        = 0x10,
 		FD_GMEM_LOGICOP_ENABLED      = 0x20,
 	} gmem_reason;
-	unsigned num_draws;
+	unsigned num_draws;   /* number of draws in current batch */
+
+	/* Stats/counters:
+	 */
+	struct {
+		uint64_t prims_emitted;
+		uint64_t draw_calls;
+		uint64_t batch_total, batch_sysmem, batch_gmem, batch_restore;
+	} stats;
 
 	/* we can't really sanely deal with wraparound point in ringbuffer
 	 * and because of the way tiling works we can't really flush at