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 <robclark@freedesktop.org>

1 files changed, 213 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_query.c b/src/gallium/drivers/freedreno/freedreno_query.c
new file mode 100644
index 0000000..35bd5d7
--- /dev/null
+++ b/src/gallium/drivers/freedreno/freedreno_query.c
@@ -0,0 +1,213 @@
+/* -*- mode: C; c-file-style: "k&r"; ttxab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
+ *
+ * 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:
+ *    Rob Clark <robclark@freedesktop.org>
+ */
+
+#include "pipe/p_state.h"
+#include "util/u_string.h"
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "os/os_time.h"
+
+#include "freedreno_query.h"
+#include "freedreno_context.h"
+#include "freedreno_util.h"
+
+#define FD_QUERY_DRAW_CALLS      (PIPE_QUERY_DRIVER_SPECIFIC + 0)
+#define FD_QUERY_BATCH_TOTAL     (PIPE_QUERY_DRIVER_SPECIFIC + 1)  /* total # of batches (submits) */
+#define FD_QUERY_BATCH_SYSMEM    (PIPE_QUERY_DRIVER_SPECIFIC + 2)  /* batches using system memory (GMEM bypass) */
+#define FD_QUERY_BATCH_GMEM      (PIPE_QUERY_DRIVER_SPECIFIC + 3)  /* batches using GMEM */
+#define FD_QUERY_BATCH_RESTORE   (PIPE_QUERY_DRIVER_SPECIFIC + 4)  /* batches requiring GMEM restore */
+
+/* Currently just simple cpu query's supported.. probably need
+ * to refactor this a bit when I'm eventually ready to add gpu
+ * queries:
+ */
+struct fd_query {
+	int type;
+	/* storage for the collected data */
+	union pipe_query_result data;
+	bool active;
+	uint64_t begin_value, end_value;
+	uint64_t begin_time, end_time;
+};
+
+static inline struct fd_query *
+fd_query(struct pipe_query *pq)
+{
+	return (struct fd_query *)pq;
+}
+
+static struct pipe_query *
+fd_create_query(struct pipe_context *pctx, unsigned query_type)
+{
+	struct fd_query *q;
+
+	switch (query_type) {
+	case PIPE_QUERY_PRIMITIVES_GENERATED:
+	case PIPE_QUERY_PRIMITIVES_EMITTED:
+	case FD_QUERY_DRAW_CALLS:
+	case FD_QUERY_BATCH_TOTAL:
+	case FD_QUERY_BATCH_SYSMEM:
+	case FD_QUERY_BATCH_GMEM:
+	case FD_QUERY_BATCH_RESTORE:
+		break;
+	default:
+		return NULL;
+	}
+
+	q = CALLOC_STRUCT(fd_query);
+	if (!q)
+		return NULL;
+
+	q->type = query_type;
+
+	return (struct pipe_query *) q;
+}
+
+static void
+fd_destroy_query(struct pipe_context *pctx, struct pipe_query *pq)
+{
+	struct fd_query *q = fd_query(pq);
+	free(q);
+}
+
+static uint64_t
+read_counter(struct pipe_context *pctx, int type)
+{
+	struct fd_context *ctx = fd_context(pctx);
+	switch (type) {
+	case PIPE_QUERY_PRIMITIVES_GENERATED:
+		/* for now same thing as _PRIMITIVES_EMITTED */
+	case PIPE_QUERY_PRIMITIVES_EMITTED:
+		return ctx->stats.prims_emitted;
+	case FD_QUERY_DRAW_CALLS:
+		return ctx->stats.draw_calls;
+	case FD_QUERY_BATCH_TOTAL:
+		return ctx->stats.batch_total;
+	case FD_QUERY_BATCH_SYSMEM:
+		return ctx->stats.batch_sysmem;
+	case FD_QUERY_BATCH_GMEM:
+		return ctx->stats.batch_gmem;
+	case FD_QUERY_BATCH_RESTORE:
+		return ctx->stats.batch_restore;
+	}
+	return 0;
+}
+
+static bool
+is_rate_query(struct fd_query *q)
+{
+	switch (q->type) {
+	case FD_QUERY_BATCH_TOTAL:
+	case FD_QUERY_BATCH_SYSMEM:
+	case FD_QUERY_BATCH_GMEM:
+	case FD_QUERY_BATCH_RESTORE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static void
+fd_begin_query(struct pipe_context *pctx, struct pipe_query *pq)
+{
+	struct fd_query *q = fd_query(pq);
+	q->active = true;
+	q->begin_value = read_counter(pctx, q->type);
+	if (is_rate_query(q))
+		q->begin_time = os_time_get();
+}
+
+static void
+fd_end_query(struct pipe_context *pctx, struct pipe_query *pq)
+{
+	struct fd_query *q = fd_query(pq);
+	q->active = false;
+	q->end_value = read_counter(pctx, q->type);
+	if (is_rate_query(q))
+		q->end_time = os_time_get();
+}
+
+static boolean
+fd_get_query_result(struct pipe_context *pctx, struct pipe_query *pq,
+		boolean wait, union pipe_query_result *result)
+{
+	struct fd_query *q = fd_query(pq);
+
+	if (q->active)
+		return false;
+
+	util_query_clear_result(result, q->type);
+
+	result->u64 = q->end_value - q->begin_value;
+
+	if (is_rate_query(q)) {
+		double fps = (result->u64 * 1000000) /
+				(double)(q->end_time - q->begin_time);
+		result->u64 = (uint64_t)fps;
+	}
+
+	return true;
+}
+
+static int
+fd_get_driver_query_info(struct pipe_screen *pscreen,
+		unsigned index, struct pipe_driver_query_info *info)
+{
+	struct pipe_driver_query_info list[] = {
+			{"draw-calls", FD_QUERY_DRAW_CALLS, 0},
+			{"batches", FD_QUERY_BATCH_TOTAL, 0},
+			{"batches-sysmem", FD_QUERY_BATCH_SYSMEM, 0},
+			{"batches-gmem", FD_QUERY_BATCH_GMEM, 0},
+			{"restores", FD_QUERY_BATCH_RESTORE, 0},
+	};
+
+	if (!info)
+		return ARRAY_SIZE(list);
+
+	if (index >= ARRAY_SIZE(list))
+		return 0;
+
+	*info = list[index];
+	return 1;
+}
+
+void
+fd_query_screen_init(struct pipe_screen *pscreen)
+{
+	pscreen->get_driver_query_info = fd_get_driver_query_info;
+}
+
+void
+fd_query_context_init(struct pipe_context *pctx)
+{
+	pctx->create_query = fd_create_query;
+	pctx->destroy_query = fd_destroy_query;
+	pctx->begin_query = fd_begin_query;
+	pctx->end_query = fd_end_query;
+	pctx->get_query_result = fd_get_query_result;
+}