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diff --git a/src/gallium/drivers/freedreno/freedreno_query_hw.h b/src/gallium/drivers/freedreno/freedreno_query_hw.h
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+++ b/src/gallium/drivers/freedreno/freedreno_query_hw.h
@@ -0,0 +1,164 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2014 Rob Clark <[email protected]>
+ *
+ * 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 <[email protected]>
+ */
+
+#ifndef FREEDRENO_QUERY_HW_H_
+#define FREEDRENO_QUERY_HW_H_
+
+#include "util/u_double_list.h"
+
+#include "freedreno_query.h"
+#include "freedreno_context.h"
+
+
+/*
+ * HW Queries:
+ *
+ * See: https://github.com/freedreno/freedreno/wiki/Queries#hardware-queries
+ *
+ * Hardware queries will be specific to gpu generation, but they need
+ * some common infrastructure for triggering start/stop samples at
+ * various points (for example, to exclude mem2gmem/gmem2mem or clear)
+ * as well as per tile tracking.
+ *
+ * NOTE: in at least some cases hw writes sample values to memory addr
+ * specified in some register.  So we don't really have the option to
+ * just sample the same counter multiple times for multiple different
+ * queries with the same query_type.  So we cache per sample provider
+ * the most recent sample since the last draw.  This way multiple
+ * sample periods for multiple queries can reference the same sample.
+ *
+ * fd_hw_sample_provider:
+ *   - one per query type, registered/implemented by gpu generation
+ *     specific code
+ *   - can construct fd_hw_samples on demand
+ *   - most recent sample (since last draw) cached so multiple
+ *     different queries can ref the same sample
+ *
+ * fd_hw_sample:
+ *   - abstracts one snapshot of counter value(s) across N tiles
+ *   - backing object not allocated until submit time when number
+ *     of samples and number of tiles is known
+ *
+ * fd_hw_sample_period:
+ *   - consists of start and stop sample
+ *   - a query accumulates a list of sample periods
+ *   - the query result is the sum of the sample periods
+ */
+
+struct fd_hw_sample_provider {
+	unsigned query_type;
+
+	/* stages applicable to the query type: */
+	enum fd_render_stage active;
+
+	/* when a new sample is required, emit appropriate cmdstream
+	 * and return a sample object:
+	 */
+	struct fd_hw_sample *(*get_sample)(struct fd_context *ctx,
+			struct fd_ringbuffer *ring);
+
+	/* accumulate the results from specified sample period: */
+	void (*accumulate_result)(struct fd_context *ctx,
+			const void *start, const void *end,
+			union pipe_query_result *result);
+};
+
+struct fd_hw_sample {
+	struct pipe_reference reference;  /* keep this first */
+
+	/* offset and size of the sample are know at the time the
+	 * sample is constructed.
+	 */
+	uint32_t size;
+	uint32_t offset;
+
+	/* backing object, offset/stride/etc are determined not when
+	 * the sample is constructed, but when the batch is submitted.
+	 * This way we can defer allocation until total # of requested
+	 * samples, and total # of tiles, is known.
+	 */
+	struct fd_bo *bo;
+	uint32_t num_tiles;
+	uint32_t tile_stride;
+};
+
+struct fd_hw_sample_period;
+
+struct fd_hw_query {
+	struct fd_query base;
+
+	const struct fd_hw_sample_provider *provider;
+
+	/* list of fd_hw_sample_period in previous submits: */
+	struct list_head periods;
+
+	/* list of fd_hw_sample_period's in current submit: */
+	struct list_head current_periods;
+
+	/* if active and not paused, the current sample period (not
+	 * yet added to current_periods):
+	 */
+	struct fd_hw_sample_period *period;
+
+	struct list_head list;  /* list-node in ctx->active_queries */
+};
+
+static inline struct fd_hw_query *
+fd_hw_query(struct fd_query *q)
+{
+	return (struct fd_hw_query *)q;
+}
+
+struct fd_query * fd_hw_create_query(struct fd_context *ctx, unsigned query_type);
+/* helper for sample providers: */
+struct fd_hw_sample * fd_hw_sample_init(struct fd_context *ctx, uint32_t size);
+/* don't call directly, use fd_hw_sample_reference() */
+void __fd_hw_sample_destroy(struct fd_context *ctx, struct fd_hw_sample *samp);
+void fd_hw_query_prepare(struct fd_context *ctx, uint32_t num_tiles);
+void fd_hw_query_prepare_tile(struct fd_context *ctx, uint32_t n,
+		struct fd_ringbuffer *ring);
+void fd_hw_query_set_stage(struct fd_context *ctx,
+		struct fd_ringbuffer *ring, enum fd_render_stage stage);
+void fd_hw_query_register_provider(struct pipe_context *pctx,
+		const struct fd_hw_sample_provider *provider);
+void fd_hw_query_init(struct pipe_context *pctx);
+void fd_hw_query_fini(struct pipe_context *pctx);
+
+static inline void
+fd_hw_sample_reference(struct fd_context *ctx,
+		struct fd_hw_sample **ptr, struct fd_hw_sample *samp)
+{
+	struct fd_hw_sample *old_samp = *ptr;
+
+	if (pipe_reference(&(*ptr)->reference, &samp->reference))
+		__fd_hw_sample_destroy(ctx, old_samp);
+	if (ptr)
+		*ptr = samp;
+}
+
+#endif /* FREEDRENO_QUERY_HW_H_ */