freedreno/a3xx: occlusion query support

Signed-off-by: Rob Clark <robclark@freedesktop.org>

src/gallium/drivers/freedreno/Makefile.sources

@@ -40,6 +40,7 @@ a3xx_SOURCES := \
 	a3xx/fd3_emit.c \
 	a3xx/fd3_gmem.c \
 	a3xx/fd3_program.c \
+	a3xx/fd3_query.c \
 	a3xx/fd3_rasterizer.c \
 	a3xx/fd3_screen.c \
 	a3xx/fd3_texture.c \

src/gallium/drivers/freedreno/a3xx/fd3_context.c

@@ -33,6 +33,7 @@
 #include "fd3_emit.h"
 #include "fd3_gmem.h"
 #include "fd3_program.h"
+#include "fd3_query.h"
 #include "fd3_rasterizer.h"
 #include "fd3_texture.h"
 #include "fd3_zsa.h"
@@ -134,5 +135,7 @@ fd3_context_create(struct pipe_screen *pscreen, void *priv)
 	fd3_ctx->solid_vbuf = create_solid_vertexbuf(pctx);
 	fd3_ctx->blit_texcoord_vbuf = create_blit_texcoord_vertexbuf(pctx);
 
+	fd3_query_context_init(pctx);
+
 	return pctx;
 }

src/gallium/drivers/freedreno/a3xx/fd3_query.c

@@ -0,0 +1,139 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2014 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 "freedreno_query_hw.h"
+#include "freedreno_context.h"
+#include "freedreno_util.h"
+
+#include "fd3_query.h"
+#include "fd3_util.h"
+
+
+struct fd_rb_samp_ctrs {
+	uint64_t ctr[16];
+};
+
+/*
+ * Occlusion Query:
+ *
+ * OCCLUSION_COUNTER and OCCLUSION_PREDICATE differ only in how they
+ * interpret results
+ */
+
+static struct fd_hw_sample *
+occlusion_get_sample(struct fd_context *ctx, struct fd_ringbuffer *ring)
+{
+	struct fd_hw_sample *samp =
+			fd_hw_sample_init(ctx, sizeof(struct fd_rb_samp_ctrs));
+
+	/* Set RB_SAMPLE_COUNT_ADDR to samp->offset plus value of
+	 * HW_QUERY_BASE_REG register:
+	 */
+	OUT_PKT3(ring, CP_SET_CONSTANT, 3);
+	OUT_RING(ring, CP_REG(REG_A3XX_RB_SAMPLE_COUNT_ADDR) | 0x80000000);
+	OUT_RING(ring, HW_QUERY_BASE_REG);
+	OUT_RING(ring, samp->offset);
+
+	OUT_PKT0(ring, REG_A3XX_RB_SAMPLE_COUNT_CONTROL, 1);
+	OUT_RING(ring, A3XX_RB_SAMPLE_COUNT_CONTROL_COPY);
+
+	OUT_PKT3(ring, CP_DRAW_INDX, 3);
+	OUT_RING(ring, 0x00000000);
+	OUT_RING(ring, DRAW(DI_PT_POINTLIST_A2XX, DI_SRC_SEL_AUTO_INDEX,
+			INDEX_SIZE_IGN, USE_VISIBILITY));
+	OUT_RING(ring, 0);             /* NumIndices */
+
+	OUT_PKT3(ring, CP_EVENT_WRITE, 1);
+	OUT_RING(ring, ZPASS_DONE);
+
+	OUT_PKT0(ring, REG_A3XX_RBBM_PERFCTR_CTL, 1);
+	OUT_RING(ring, A3XX_RBBM_PERFCTR_CTL_ENABLE);
+
+	OUT_PKT0(ring, REG_A3XX_VBIF_PERF_CNT_EN, 1);
+	OUT_RING(ring, A3XX_VBIF_PERF_CNT_EN_CNT0 |
+			A3XX_VBIF_PERF_CNT_EN_CNT1 |
+			A3XX_VBIF_PERF_CNT_EN_PWRCNT0 |
+			A3XX_VBIF_PERF_CNT_EN_PWRCNT1 |
+			A3XX_VBIF_PERF_CNT_EN_PWRCNT2);
+
+	return samp;
+}
+
+static uint64_t
+count_samples(const struct fd_rb_samp_ctrs *start,
+		const struct fd_rb_samp_ctrs *end)
+{
+	uint64_t n = 0;
+	unsigned i;
+
+	/* not quite sure what all of these are, possibly different
+	 * counters for each MRT render target:
+	 */
+	for (i = 0; i < 16; i += 4)
+		n += end->ctr[i] - start->ctr[i];
+
+	return n;
+}
+
+static void
+occlusion_counter_accumulate_result(struct fd_context *ctx,
+		const void *start, const void *end,
+		union pipe_query_result *result)
+{
+	uint64_t n = count_samples(start, end);
+	result->u64 += n;
+}
+
+static void
+occlusion_predicate_accumulate_result(struct fd_context *ctx,
+		const void *start, const void *end,
+		union pipe_query_result *result)
+{
+	uint64_t n = count_samples(start, end);
+	result->b |= (n > 0);
+}
+
+static const struct fd_hw_sample_provider occlusion_counter = {
+		.query_type = PIPE_QUERY_OCCLUSION_COUNTER,
+		.active = FD_STAGE_DRAW, /* | FD_STAGE_CLEAR ??? */
+		.get_sample = occlusion_get_sample,
+		.accumulate_result = occlusion_counter_accumulate_result,
+};
+
+static const struct fd_hw_sample_provider occlusion_predicate = {
+		.query_type = PIPE_QUERY_OCCLUSION_PREDICATE,
+		.active = FD_STAGE_DRAW, /* | FD_STAGE_CLEAR ??? */
+		.get_sample = occlusion_get_sample,
+		.accumulate_result = occlusion_predicate_accumulate_result,
+};
+
+void fd3_query_context_init(struct pipe_context *pctx)
+{
+	fd_hw_query_register_provider(pctx, &occlusion_counter);
+	fd_hw_query_register_provider(pctx, &occlusion_predicate);
+}

src/gallium/drivers/freedreno/a3xx/fd3_query.h

@@ -0,0 +1,36 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2014 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>
+ */
+
+#ifndef FD3_QUERY_H_
+#define FD3_QUERY_H_
+
+#include "pipe/p_context.h"
+
+void fd3_query_context_init(struct pipe_context *pctx);
+
+#endif /* FD3_QUERY_H_ */

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -143,6 +143,8 @@ tables for things that differ if the delta is not too much..
 static int
 fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 {
+	struct fd_screen *screen = fd_screen(pscreen);
+
 	/* this is probably not totally correct.. but it's a start: */
 	switch (param) {
 	/* Supported features (boolean caps). */
@@ -236,11 +238,12 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_RENDER_TARGETS:
 		return 1;
 
-	/* Timer queries. */
+	/* Queries. */
 	case PIPE_CAP_QUERY_TIME_ELAPSED:
-	case PIPE_CAP_OCCLUSION_QUERY:
 	case PIPE_CAP_QUERY_TIMESTAMP:
 		return 0;
+	case PIPE_CAP_OCCLUSION_QUERY:
+		return (screen->gpu_id >= 300) ? 1: 0;
 
 	case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 	case PIPE_CAP_MIN_TEXEL_OFFSET:
@@ -253,7 +256,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_ENDIANNESS:
 		return PIPE_ENDIAN_LITTLE;
 
-        case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
+	case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 		return 64;
 
 	default: