src/mesa/drivers/dri/i965/brw_performance_query.c - platform/external/mesa3d - Git at Google

 /*
  * Copyright © 2013 Intel Corporation
  *
  * 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.
  */

 /**
  * \file brw_performance_query.c
  *
  * Implementation of the GL_INTEL_performance_query extension.
  *
  * Currently there are two possible counter sources exposed here:
  *
  * On Gen6+ hardware we have numerous 64bit Pipeline Statistics Registers
  * that we can snapshot at the beginning and end of a query.
  *
  * On Gen7.5+ we have Observability Architecture counters which are
  * covered in separate document from the rest of the PRMs.  It is available at:
  * https://01.org/linuxgraphics/documentation/driver-documentation-prms
  * => 2013 Intel Core Processor Family => Observability Performance Counters
  * (This one volume covers Sandybridge, Ivybridge, Baytrail, and Haswell,
  * though notably we currently only support OA counters for Haswell+)
  */

 #include <limits.h>

 /* put before sys/types.h to silence glibc warnings */
 #ifdef MAJOR_IN_MKDEV
 #include <sys/mkdev.h>
 #endif
 #ifdef MAJOR_IN_SYSMACROS
 #include <sys/sysmacros.h>
 #endif
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/ioctl.h>

 #include <xf86drm.h>
 #include "drm-uapi/i915_drm.h"

 #include "main/hash.h"
 #include "main/macros.h"
 #include "main/mtypes.h"
 #include "main/performance_query.h"

 #include "util/bitset.h"
 #include "util/ralloc.h"
 #include "util/hash_table.h"
 #include "util/list.h"
 #include "util/u_math.h"

 #include "brw_context.h"
 #include "brw_defines.h"
 #include "intel_batchbuffer.h"

 #include "perf/gen_perf.h"
 #include "perf/gen_perf_regs.h"
 #include "perf/gen_perf_mdapi.h"
 #include "perf/gen_perf_query.h"

 #define FILE_DEBUG_FLAG DEBUG_PERFMON

 #define OAREPORT_REASON_MASK           0x3f
 #define OAREPORT_REASON_SHIFT          19
 #define OAREPORT_REASON_TIMER          (1<<0)
 #define OAREPORT_REASON_TRIGGER1       (1<<1)
 #define OAREPORT_REASON_TRIGGER2       (1<<2)
 #define OAREPORT_REASON_CTX_SWITCH     (1<<3)
 #define OAREPORT_REASON_GO_TRANSITION  (1<<4)

 struct brw_perf_query_object {
    struct gl_perf_query_object base;
    struct gen_perf_query_object *query;
 };

 /** Downcasting convenience macro. */
 static inline struct brw_perf_query_object *
 brw_perf_query(struct gl_perf_query_object *o)
 {
    return (struct brw_perf_query_object *) o;
 }

 #define MI_RPC_BO_SIZE              4096
 #define MI_RPC_BO_END_OFFSET_BYTES  (MI_RPC_BO_SIZE / 2)
 #define MI_FREQ_START_OFFSET_BYTES  (3072)
 #define MI_FREQ_END_OFFSET_BYTES    (3076)

 /******************************************************************************/

 static bool
 brw_is_perf_query_ready(struct gl_context *ctx,
                         struct gl_perf_query_object *o);

 static void
 dump_perf_query_callback(GLuint id, void *query_void, void *brw_void)
 {
    struct brw_context *ctx = brw_void;
    struct gen_perf_context *perf_ctx = ctx->perf_ctx;
    struct gl_perf_query_object *o = query_void;
    struct brw_perf_query_object * brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;

    DBG("%4d: %-6s %-8s ",
        id,
        o->Used ? "Dirty," : "New,",
        o->Active ? "Active," : (o->Ready ? "Ready," : "Pending,"));
    gen_perf_dump_query(perf_ctx, obj, &ctx->batch);
 }

 static void
 dump_perf_queries(struct brw_context *brw)
 {
    struct gl_context *ctx = &brw->ctx;
    gen_perf_dump_query_count(brw->perf_ctx);
    _mesa_HashWalk(ctx->PerfQuery.Objects, dump_perf_query_callback, brw);
 }

 /**
  * Driver hook for glGetPerfQueryInfoINTEL().
  */
 static void
 brw_get_perf_query_info(struct gl_context *ctx,
                         unsigned query_index,
                         const char **name,
                         GLuint *data_size,
                         GLuint *n_counters,
                         GLuint *n_active)
 {
    struct brw_context *brw = brw_context(ctx);
    struct gen_perf_context *perf_ctx = brw->perf_ctx;
    struct gen_perf_config *perf_cfg = gen_perf_config(perf_ctx);
    const struct gen_perf_query_info *query = &perf_cfg->queries[query_index];

    *name = query->name;
    *data_size = query->data_size;
    *n_counters = query->n_counters;
    *n_active = gen_perf_active_queries(perf_ctx, query);
 }

 static GLuint
 gen_counter_type_enum_to_gl_type(enum gen_perf_counter_type type)
 {
    switch (type) {
    case GEN_PERF_COUNTER_TYPE_EVENT: return GL_PERFQUERY_COUNTER_EVENT_INTEL;
    case GEN_PERF_COUNTER_TYPE_DURATION_NORM: return GL_PERFQUERY_COUNTER_DURATION_NORM_INTEL;
    case GEN_PERF_COUNTER_TYPE_DURATION_RAW: return GL_PERFQUERY_COUNTER_DURATION_RAW_INTEL;
    case GEN_PERF_COUNTER_TYPE_THROUGHPUT: return GL_PERFQUERY_COUNTER_THROUGHPUT_INTEL;
    case GEN_PERF_COUNTER_TYPE_RAW: return GL_PERFQUERY_COUNTER_RAW_INTEL;
    case GEN_PERF_COUNTER_TYPE_TIMESTAMP: return GL_PERFQUERY_COUNTER_TIMESTAMP_INTEL;
    default:
       unreachable("Unknown counter type");
    }
 }

 static GLuint
 gen_counter_data_type_to_gl_type(enum gen_perf_counter_data_type type)
 {
    switch (type) {
    case GEN_PERF_COUNTER_DATA_TYPE_BOOL32: return GL_PERFQUERY_COUNTER_DATA_BOOL32_INTEL;
    case GEN_PERF_COUNTER_DATA_TYPE_UINT32: return GL_PERFQUERY_COUNTER_DATA_UINT32_INTEL;
    case GEN_PERF_COUNTER_DATA_TYPE_UINT64: return GL_PERFQUERY_COUNTER_DATA_UINT64_INTEL;
    case GEN_PERF_COUNTER_DATA_TYPE_FLOAT: return GL_PERFQUERY_COUNTER_DATA_FLOAT_INTEL;
    case GEN_PERF_COUNTER_DATA_TYPE_DOUBLE: return GL_PERFQUERY_COUNTER_DATA_DOUBLE_INTEL;
    default:
       unreachable("Unknown counter data type");
    }
 }

 /**
  * Driver hook for glGetPerfCounterInfoINTEL().
  */
 static void
 brw_get_perf_counter_info(struct gl_context *ctx,
                           unsigned query_index,
                           unsigned counter_index,
                           const char **name,
                           const char **desc,
                           GLuint *offset,
                           GLuint *data_size,
                           GLuint *type_enum,
                           GLuint *data_type_enum,
                           GLuint64 *raw_max)
 {
    struct brw_context *brw = brw_context(ctx);
    struct gen_perf_config *perf_cfg = gen_perf_config(brw->perf_ctx);
    const struct gen_perf_query_info *query =
       &perf_cfg->queries[query_index];
    const struct gen_perf_query_counter *counter =
       &query->counters[counter_index];

    *name = counter->name;
    *desc = counter->desc;
    *offset = counter->offset;
    *data_size = gen_perf_query_counter_get_size(counter);
    *type_enum = gen_counter_type_enum_to_gl_type(counter->type);
    *data_type_enum = gen_counter_data_type_to_gl_type(counter->data_type);
    *raw_max = counter->raw_max;
 }

 enum OaReadStatus {
    OA_READ_STATUS_ERROR,
    OA_READ_STATUS_UNFINISHED,
    OA_READ_STATUS_FINISHED,
 };

 /******************************************************************************/

 /**
  * Driver hook for glBeginPerfQueryINTEL().
  */
 static bool
 brw_begin_perf_query(struct gl_context *ctx,
                      struct gl_perf_query_object *o)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;
    struct gen_perf_context *perf_ctx = brw->perf_ctx;

    /* We can assume the frontend hides mistaken attempts to Begin a
     * query object multiple times before its End. Similarly if an
     * application reuses a query object before results have arrived
     * the frontend will wait for prior results so we don't need
     * to support abandoning in-flight results.
     */
    assert(!o->Active);
    assert(!o->Used || o->Ready); /* no in-flight query to worry about */

    DBG("Begin(%d)\n", o->Id);

    bool ret = gen_perf_begin_query(perf_ctx, obj);

    if (INTEL_DEBUG & DEBUG_PERFMON)
       dump_perf_queries(brw);

    return ret;
 }

 /**
  * Driver hook for glEndPerfQueryINTEL().
  */
 static void
 brw_end_perf_query(struct gl_context *ctx,
                      struct gl_perf_query_object *o)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;
    struct gen_perf_context *perf_ctx = brw->perf_ctx;

    DBG("End(%d)\n", o->Id);
    gen_perf_end_query(perf_ctx, obj);
 }

 static void
 brw_wait_perf_query(struct gl_context *ctx, struct gl_perf_query_object *o)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;

    assert(!o->Ready);

    gen_perf_wait_query(brw->perf_ctx, obj, &brw->batch);
 }

 static bool
 brw_is_perf_query_ready(struct gl_context *ctx,
                         struct gl_perf_query_object *o)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;

    if (o->Ready)
       return true;

    return gen_perf_is_query_ready(brw->perf_ctx, obj, &brw->batch);
 }

 /**
  * Driver hook for glGetPerfQueryDataINTEL().
  */
 static void
 brw_get_perf_query_data(struct gl_context *ctx,
                         struct gl_perf_query_object *o,
                         GLsizei data_size,
                         GLuint *data,
                         GLuint *bytes_written)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;

    assert(brw_is_perf_query_ready(ctx, o));

    DBG("GetData(%d)\n", o->Id);

    if (INTEL_DEBUG & DEBUG_PERFMON)
       dump_perf_queries(brw);

    /* We expect that the frontend only calls this hook when it knows
     * that results are available.
     */
    assert(o->Ready);

    gen_perf_get_query_data(brw->perf_ctx, obj,
                            data_size, data, bytes_written);
 }

 static struct gl_perf_query_object *
 brw_new_perf_query_object(struct gl_context *ctx, unsigned query_index)
 {
    struct brw_context *brw = brw_context(ctx);
    struct gen_perf_context *perf_ctx = brw->perf_ctx;
    struct gen_perf_query_object * obj = gen_perf_new_query(perf_ctx, query_index);
    if (unlikely(!obj))
       return NULL;

    struct brw_perf_query_object *brw_query = calloc(1, sizeof(struct brw_perf_query_object));
    if (unlikely(!brw_query)) {
       gen_perf_delete_query(perf_ctx, obj);
       return NULL;
    }

    brw_query->query = obj;
    return &brw_query->base;
 }

 /**
  * Driver hook for glDeletePerfQueryINTEL().
  */
 static void
 brw_delete_perf_query(struct gl_context *ctx,
                       struct gl_perf_query_object *o)
 {
    struct brw_context *brw = brw_context(ctx);
    struct brw_perf_query_object *brw_query = brw_perf_query(o);
    struct gen_perf_query_object *obj = brw_query->query;
    struct gen_perf_context *perf_ctx = brw->perf_ctx;

    /* We can assume that the frontend waits for a query to complete
     * before ever calling into here, so we don't have to worry about
     * deleting an in-flight query object.
     */
    assert(!o->Active);
    assert(!o->Used || o->Ready);

    DBG("Delete(%d)\n", o->Id);

    gen_perf_delete_query(perf_ctx, obj);
    free(brw_query);
 }

 /******************************************************************************/
 /* gen_device_info will have incorrect default topology values for unsupported kernels.
  * verify kernel support to ensure OA metrics are accurate.
  */
 static bool
 oa_metrics_kernel_support(int fd, const struct gen_device_info *devinfo)
 {
    if (devinfo->gen >= 10) {
       /* topology uAPI required for CNL+ (kernel 4.17+) make a call to the api
        * to verify support
        */
       struct drm_i915_query_item item = {
          .query_id = DRM_I915_QUERY_TOPOLOGY_INFO,
       };
       struct drm_i915_query query = {
          .num_items = 1,
          .items_ptr = (uintptr_t) &item,
       };

       /* kernel 4.17+ supports the query */
       return drmIoctl(fd, DRM_IOCTL_I915_QUERY, &query) == 0;
    }

    if (devinfo->gen >= 8) {
       /* 4.13+ api required for gen8 - gen9 */
       int mask;
       struct drm_i915_getparam gp = {
          .param = I915_PARAM_SLICE_MASK,
          .value = &mask,
       };
       /* kernel 4.13+ supports this parameter */
       return drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0;
    }

    if (devinfo->gen == 7)
       /* default topology values are correct for HSW */
       return true;

    /* oa not supported before gen 7*/
    return false;
 }

 static void *
 brw_oa_bo_alloc(void *bufmgr, const char *name, uint64_t size)
 {
    return brw_bo_alloc(bufmgr, name, size, BRW_MEMZONE_OTHER);
 }

 static void
 brw_oa_emit_mi_report_perf_count(void *c,
                                  void *bo,
                                  uint32_t offset_in_bytes,
                                  uint32_t report_id)
 {
    struct brw_context *ctx = c;
    ctx->vtbl.emit_mi_report_perf_count(ctx,
                                        bo,
                                        offset_in_bytes,
                                        report_id);
 }

 typedef void (*bo_unreference_t)(void *);
 typedef void *(*bo_map_t)(void *, void *, unsigned flags);
 typedef void (*bo_unmap_t)(void *);
 typedef void (* emit_mi_report_t)(void *, void *, uint32_t, uint32_t);
 typedef void (*emit_mi_flush_t)(void *);

 static void
 brw_oa_batchbuffer_flush(void *c, const char *file, int line)
 {
    struct brw_context *ctx = c;
    _intel_batchbuffer_flush_fence(ctx, -1, NULL, file,  line);
 }

 static void
 brw_oa_emit_stall_at_pixel_scoreboard(void *c)
 {
    struct brw_context *brw = c;
    brw_emit_end_of_pipe_sync(brw, PIPE_CONTROL_STALL_AT_SCOREBOARD);
 }

 static void
 brw_perf_store_register(struct brw_context *brw, struct brw_bo *bo,
                         uint32_t reg, uint32_t reg_size,
                         uint32_t offset)
 {
    if (reg_size == 8) {
       brw_store_register_mem64(brw, bo, reg, offset);
    } else {
       assert(reg_size == 4);
       brw_store_register_mem32(brw, bo, reg, offset);
    }
 }

 typedef void (*store_register_mem_t)(void *ctx, void *bo,
                                      uint32_t reg, uint32_t reg_size,
                                      uint32_t offset);
 typedef bool (*batch_references_t)(void *batch, void *bo);
 typedef void (*bo_wait_rendering_t)(void *bo);
 typedef int (*bo_busy_t)(void *bo);

 static unsigned
 brw_init_perf_query_info(struct gl_context *ctx)
 {
    struct brw_context *brw = brw_context(ctx);
    const struct gen_device_info *devinfo = &brw->screen->devinfo;

    struct gen_perf_context *perf_ctx = brw->perf_ctx;
    struct gen_perf_config *perf_cfg = gen_perf_config(perf_ctx);

    if (perf_cfg)
       return perf_cfg->n_queries;

    if (!oa_metrics_kernel_support(brw->screen->fd, devinfo))
       return 0;

    perf_cfg = gen_perf_new(ctx);

    perf_cfg->vtbl.bo_alloc = brw_oa_bo_alloc;
    perf_cfg->vtbl.bo_unreference = (bo_unreference_t)brw_bo_unreference;
    perf_cfg->vtbl.bo_map = (bo_map_t)brw_bo_map;
    perf_cfg->vtbl.bo_unmap = (bo_unmap_t)brw_bo_unmap;
    perf_cfg->vtbl.emit_stall_at_pixel_scoreboard =
       (emit_mi_flush_t)brw_oa_emit_stall_at_pixel_scoreboard;
    perf_cfg->vtbl.emit_mi_report_perf_count =
       (emit_mi_report_t)brw_oa_emit_mi_report_perf_count;
    perf_cfg->vtbl.batchbuffer_flush = brw_oa_batchbuffer_flush;
    perf_cfg->vtbl.store_register_mem =
       (store_register_mem_t) brw_perf_store_register;
    perf_cfg->vtbl.batch_references = (batch_references_t)brw_batch_references;
    perf_cfg->vtbl.bo_wait_rendering = (bo_wait_rendering_t)brw_bo_wait_rendering;
    perf_cfg->vtbl.bo_busy = (bo_busy_t)brw_bo_busy;

    gen_perf_init_context(perf_ctx, perf_cfg, brw, brw->bufmgr, devinfo,
                          brw->hw_ctx, brw->screen->fd);
    gen_perf_init_metrics(perf_cfg, devinfo, brw->screen->fd,
                          true /* pipeline stats */);

    return perf_cfg->n_queries;
 }

 void
 brw_init_performance_queries(struct brw_context *brw)
 {
    struct gl_context *ctx = &brw->ctx;

    ctx->Driver.InitPerfQueryInfo = brw_init_perf_query_info;
    ctx->Driver.GetPerfQueryInfo = brw_get_perf_query_info;
    ctx->Driver.GetPerfCounterInfo = brw_get_perf_counter_info;
    ctx->Driver.NewPerfQueryObject = brw_new_perf_query_object;
    ctx->Driver.DeletePerfQuery = brw_delete_perf_query;
    ctx->Driver.BeginPerfQuery = brw_begin_perf_query;
    ctx->Driver.EndPerfQuery = brw_end_perf_query;
    ctx->Driver.WaitPerfQuery = brw_wait_perf_query;
    ctx->Driver.IsPerfQueryReady = brw_is_perf_query_ready;
    ctx->Driver.GetPerfQueryData = brw_get_perf_query_data;
 }
	/*
	* Copyright © 2013 Intel Corporation
	*
	* 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.
	*/

	/**
	* \file brw_performance_query.c
	*
	* Implementation of the GL_INTEL_performance_query extension.
	*
	* Currently there are two possible counter sources exposed here:
	*
	* On Gen6+ hardware we have numerous 64bit Pipeline Statistics Registers
	* that we can snapshot at the beginning and end of a query.
	*
	* On Gen7.5+ we have Observability Architecture counters which are
	* covered in separate document from the rest of the PRMs. It is available at:
	* https://01.org/linuxgraphics/documentation/driver-documentation-prms
	* => 2013 Intel Core Processor Family => Observability Performance Counters
	* (This one volume covers Sandybridge, Ivybridge, Baytrail, and Haswell,
	* though notably we currently only support OA counters for Haswell+)
	*/

	#include <limits.h>

	/* put before sys/types.h to silence glibc warnings */
	#ifdef MAJOR_IN_MKDEV
	#include <sys/mkdev.h>
	#endif
	#ifdef MAJOR_IN_SYSMACROS
	#include <sys/sysmacros.h>
	#endif
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <fcntl.h>
	#include <sys/mman.h>
	#include <sys/ioctl.h>

	#include <xf86drm.h>
	#include "drm-uapi/i915_drm.h"

	#include "main/hash.h"
	#include "main/macros.h"
	#include "main/mtypes.h"
	#include "main/performance_query.h"

	#include "util/bitset.h"
	#include "util/ralloc.h"
	#include "util/hash_table.h"
	#include "util/list.h"
	#include "util/u_math.h"

	#include "brw_context.h"
	#include "brw_defines.h"
	#include "intel_batchbuffer.h"

	#include "perf/gen_perf.h"
	#include "perf/gen_perf_regs.h"
	#include "perf/gen_perf_mdapi.h"
	#include "perf/gen_perf_query.h"

	#define FILE_DEBUG_FLAG DEBUG_PERFMON

	#define OAREPORT_REASON_MASK 0x3f
	#define OAREPORT_REASON_SHIFT 19
	#define OAREPORT_REASON_TIMER (1<<0)
	#define OAREPORT_REASON_TRIGGER1 (1<<1)
	#define OAREPORT_REASON_TRIGGER2 (1<<2)
	#define OAREPORT_REASON_CTX_SWITCH (1<<3)
	#define OAREPORT_REASON_GO_TRANSITION (1<<4)

	struct brw_perf_query_object {
	struct gl_perf_query_object base;
	struct gen_perf_query_object *query;
	};

	/** Downcasting convenience macro. */
	static inline struct brw_perf_query_object *
	brw_perf_query(struct gl_perf_query_object *o)
	{
	return (struct brw_perf_query_object *) o;
	}

	#define MI_RPC_BO_SIZE 4096
	#define MI_RPC_BO_END_OFFSET_BYTES (MI_RPC_BO_SIZE / 2)
	#define MI_FREQ_START_OFFSET_BYTES (3072)
	#define MI_FREQ_END_OFFSET_BYTES (3076)

	/******************************************************************************/

	static bool
	brw_is_perf_query_ready(struct gl_context *ctx,
	struct gl_perf_query_object *o);

	static void
	dump_perf_query_callback(GLuint id, void query_void, void brw_void)
	{
	struct brw_context *ctx = brw_void;
	struct gen_perf_context *perf_ctx = ctx->perf_ctx;
	struct gl_perf_query_object *o = query_void;
	struct brw_perf_query_object * brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;

	DBG("%4d: %-6s %-8s ",
	id,
	o->Used ? "Dirty," : "New,",
	o->Active ? "Active," : (o->Ready ? "Ready," : "Pending,"));
	gen_perf_dump_query(perf_ctx, obj, &ctx->batch);
	}

	static void
	dump_perf_queries(struct brw_context *brw)
	{
	struct gl_context *ctx = &brw->ctx;
	gen_perf_dump_query_count(brw->perf_ctx);
	_mesa_HashWalk(ctx->PerfQuery.Objects, dump_perf_query_callback, brw);
	}

	/**
	* Driver hook for glGetPerfQueryInfoINTEL().
	*/
	static void
	brw_get_perf_query_info(struct gl_context *ctx,
	unsigned query_index,
	const char **name,
	GLuint *data_size,
	GLuint *n_counters,
	GLuint *n_active)
	{
	struct brw_context *brw = brw_context(ctx);
	struct gen_perf_context *perf_ctx = brw->perf_ctx;
	struct gen_perf_config *perf_cfg = gen_perf_config(perf_ctx);
	const struct gen_perf_query_info *query = &perf_cfg->queries[query_index];

	*name = query->name;
	*data_size = query->data_size;
	*n_counters = query->n_counters;
	*n_active = gen_perf_active_queries(perf_ctx, query);
	}

	static GLuint
	gen_counter_type_enum_to_gl_type(enum gen_perf_counter_type type)
	{
	switch (type) {
	case GEN_PERF_COUNTER_TYPE_EVENT: return GL_PERFQUERY_COUNTER_EVENT_INTEL;
	case GEN_PERF_COUNTER_TYPE_DURATION_NORM: return GL_PERFQUERY_COUNTER_DURATION_NORM_INTEL;
	case GEN_PERF_COUNTER_TYPE_DURATION_RAW: return GL_PERFQUERY_COUNTER_DURATION_RAW_INTEL;
	case GEN_PERF_COUNTER_TYPE_THROUGHPUT: return GL_PERFQUERY_COUNTER_THROUGHPUT_INTEL;
	case GEN_PERF_COUNTER_TYPE_RAW: return GL_PERFQUERY_COUNTER_RAW_INTEL;
	case GEN_PERF_COUNTER_TYPE_TIMESTAMP: return GL_PERFQUERY_COUNTER_TIMESTAMP_INTEL;
	default:
	unreachable("Unknown counter type");
	}
	}

	static GLuint
	gen_counter_data_type_to_gl_type(enum gen_perf_counter_data_type type)
	{
	switch (type) {
	case GEN_PERF_COUNTER_DATA_TYPE_BOOL32: return GL_PERFQUERY_COUNTER_DATA_BOOL32_INTEL;
	case GEN_PERF_COUNTER_DATA_TYPE_UINT32: return GL_PERFQUERY_COUNTER_DATA_UINT32_INTEL;
	case GEN_PERF_COUNTER_DATA_TYPE_UINT64: return GL_PERFQUERY_COUNTER_DATA_UINT64_INTEL;
	case GEN_PERF_COUNTER_DATA_TYPE_FLOAT: return GL_PERFQUERY_COUNTER_DATA_FLOAT_INTEL;
	case GEN_PERF_COUNTER_DATA_TYPE_DOUBLE: return GL_PERFQUERY_COUNTER_DATA_DOUBLE_INTEL;
	default:
	unreachable("Unknown counter data type");
	}
	}

	/**
	* Driver hook for glGetPerfCounterInfoINTEL().
	*/
	static void
	brw_get_perf_counter_info(struct gl_context *ctx,
	unsigned query_index,
	unsigned counter_index,
	const char **name,
	const char **desc,
	GLuint *offset,
	GLuint *data_size,
	GLuint *type_enum,
	GLuint *data_type_enum,
	GLuint64 *raw_max)
	{
	struct brw_context *brw = brw_context(ctx);
	struct gen_perf_config *perf_cfg = gen_perf_config(brw->perf_ctx);
	const struct gen_perf_query_info *query =
	&perf_cfg->queries[query_index];
	const struct gen_perf_query_counter *counter =
	&query->counters[counter_index];

	*name = counter->name;
	*desc = counter->desc;
	*offset = counter->offset;
	*data_size = gen_perf_query_counter_get_size(counter);
	*type_enum = gen_counter_type_enum_to_gl_type(counter->type);
	*data_type_enum = gen_counter_data_type_to_gl_type(counter->data_type);
	*raw_max = counter->raw_max;
	}

	enum OaReadStatus {
	OA_READ_STATUS_ERROR,
	OA_READ_STATUS_UNFINISHED,
	OA_READ_STATUS_FINISHED,
	};

	/******************************************************************************/

	/**
	* Driver hook for glBeginPerfQueryINTEL().
	*/
	static bool
	brw_begin_perf_query(struct gl_context *ctx,
	struct gl_perf_query_object *o)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;
	struct gen_perf_context *perf_ctx = brw->perf_ctx;

	/* We can assume the frontend hides mistaken attempts to Begin a
	* query object multiple times before its End. Similarly if an
	* application reuses a query object before results have arrived
	* the frontend will wait for prior results so we don't need
	* to support abandoning in-flight results.
	*/
	assert(!o->Active);
	assert(!o->Used \|\| o->Ready); /* no in-flight query to worry about */

	DBG("Begin(%d)\n", o->Id);

	bool ret = gen_perf_begin_query(perf_ctx, obj);

	if (INTEL_DEBUG & DEBUG_PERFMON)
	dump_perf_queries(brw);

	return ret;
	}

	/**
	* Driver hook for glEndPerfQueryINTEL().
	*/
	static void
	brw_end_perf_query(struct gl_context *ctx,
	struct gl_perf_query_object *o)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;
	struct gen_perf_context *perf_ctx = brw->perf_ctx;

	DBG("End(%d)\n", o->Id);
	gen_perf_end_query(perf_ctx, obj);
	}

	static void
	brw_wait_perf_query(struct gl_context ctx, struct gl_perf_query_object o)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;

	assert(!o->Ready);

	gen_perf_wait_query(brw->perf_ctx, obj, &brw->batch);
	}

	static bool
	brw_is_perf_query_ready(struct gl_context *ctx,
	struct gl_perf_query_object *o)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;

	if (o->Ready)
	return true;

	return gen_perf_is_query_ready(brw->perf_ctx, obj, &brw->batch);
	}

	/**
	* Driver hook for glGetPerfQueryDataINTEL().
	*/
	static void
	brw_get_perf_query_data(struct gl_context *ctx,
	struct gl_perf_query_object *o,
	GLsizei data_size,
	GLuint *data,
	GLuint *bytes_written)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;

	assert(brw_is_perf_query_ready(ctx, o));

	DBG("GetData(%d)\n", o->Id);

	if (INTEL_DEBUG & DEBUG_PERFMON)
	dump_perf_queries(brw);

	/* We expect that the frontend only calls this hook when it knows
	* that results are available.
	*/
	assert(o->Ready);

	gen_perf_get_query_data(brw->perf_ctx, obj,
	data_size, data, bytes_written);
	}

	static struct gl_perf_query_object *
	brw_new_perf_query_object(struct gl_context *ctx, unsigned query_index)
	{
	struct brw_context *brw = brw_context(ctx);
	struct gen_perf_context *perf_ctx = brw->perf_ctx;
	struct gen_perf_query_object * obj = gen_perf_new_query(perf_ctx, query_index);
	if (unlikely(!obj))
	return NULL;

	struct brw_perf_query_object *brw_query = calloc(1, sizeof(struct brw_perf_query_object));
	if (unlikely(!brw_query)) {
	gen_perf_delete_query(perf_ctx, obj);
	return NULL;
	}

	brw_query->query = obj;
	return &brw_query->base;
	}

	/**
	* Driver hook for glDeletePerfQueryINTEL().
	*/
	static void
	brw_delete_perf_query(struct gl_context *ctx,
	struct gl_perf_query_object *o)
	{
	struct brw_context *brw = brw_context(ctx);
	struct brw_perf_query_object *brw_query = brw_perf_query(o);
	struct gen_perf_query_object *obj = brw_query->query;
	struct gen_perf_context *perf_ctx = brw->perf_ctx;

	/* We can assume that the frontend waits for a query to complete
	* before ever calling into here, so we don't have to worry about
	* deleting an in-flight query object.
	*/
	assert(!o->Active);
	assert(!o->Used \|\| o->Ready);

	DBG("Delete(%d)\n", o->Id);

	gen_perf_delete_query(perf_ctx, obj);
	free(brw_query);
	}

	/******************************************************************************/
	/* gen_device_info will have incorrect default topology values for unsupported kernels.
	* verify kernel support to ensure OA metrics are accurate.
	*/
	static bool
	oa_metrics_kernel_support(int fd, const struct gen_device_info *devinfo)
	{
	if (devinfo->gen >= 10) {
	/* topology uAPI required for CNL+ (kernel 4.17+) make a call to the api
	* to verify support
	*/
	struct drm_i915_query_item item = {
	.query_id = DRM_I915_QUERY_TOPOLOGY_INFO,
	};
	struct drm_i915_query query = {
	.num_items = 1,
	.items_ptr = (uintptr_t) &item,
	};

	/* kernel 4.17+ supports the query */
	return drmIoctl(fd, DRM_IOCTL_I915_QUERY, &query) == 0;
	}

	if (devinfo->gen >= 8) {
	/* 4.13+ api required for gen8 - gen9 */
	int mask;
	struct drm_i915_getparam gp = {
	.param = I915_PARAM_SLICE_MASK,
	.value = &mask,
	};
	/* kernel 4.13+ supports this parameter */
	return drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0;
	}

	if (devinfo->gen == 7)
	/* default topology values are correct for HSW */
	return true;

	/* oa not supported before gen 7*/
	return false;
	}

	static void *
	brw_oa_bo_alloc(void bufmgr, const char name, uint64_t size)
	{
	return brw_bo_alloc(bufmgr, name, size, BRW_MEMZONE_OTHER);
	}

	static void
	brw_oa_emit_mi_report_perf_count(void *c,
	void *bo,
	uint32_t offset_in_bytes,
	uint32_t report_id)
	{
	struct brw_context *ctx = c;
	ctx->vtbl.emit_mi_report_perf_count(ctx,
	bo,
	offset_in_bytes,
	report_id);
	}

	typedef void (bo_unreference_t)(void );
	typedef void (bo_map_t)(void , void , unsigned flags);
	typedef void (bo_unmap_t)(void );
	typedef void (* emit_mi_report_t)(void , void , uint32_t, uint32_t);
	typedef void (emit_mi_flush_t)(void );

	static void
	brw_oa_batchbuffer_flush(void c, const char file, int line)
	{
	struct brw_context *ctx = c;
	_intel_batchbuffer_flush_fence(ctx, -1, NULL, file, line);
	}

	static void
	brw_oa_emit_stall_at_pixel_scoreboard(void *c)
	{
	struct brw_context *brw = c;
	brw_emit_end_of_pipe_sync(brw, PIPE_CONTROL_STALL_AT_SCOREBOARD);
	}

	static void
	brw_perf_store_register(struct brw_context brw, struct brw_bo bo,
	uint32_t reg, uint32_t reg_size,
	uint32_t offset)
	{
	if (reg_size == 8) {
	brw_store_register_mem64(brw, bo, reg, offset);
	} else {
	assert(reg_size == 4);
	brw_store_register_mem32(brw, bo, reg, offset);
	}
	}

	typedef void (store_register_mem_t)(void ctx, void *bo,
	uint32_t reg, uint32_t reg_size,
	uint32_t offset);
	typedef bool (batch_references_t)(void batch, void *bo);
	typedef void (bo_wait_rendering_t)(void bo);
	typedef int (bo_busy_t)(void bo);

	static unsigned
	brw_init_perf_query_info(struct gl_context *ctx)
	{
	struct brw_context *brw = brw_context(ctx);
	const struct gen_device_info *devinfo = &brw->screen->devinfo;

	struct gen_perf_context *perf_ctx = brw->perf_ctx;
	struct gen_perf_config *perf_cfg = gen_perf_config(perf_ctx);

	if (perf_cfg)
	return perf_cfg->n_queries;

	if (!oa_metrics_kernel_support(brw->screen->fd, devinfo))
	return 0;

	perf_cfg = gen_perf_new(ctx);

	perf_cfg->vtbl.bo_alloc = brw_oa_bo_alloc;
	perf_cfg->vtbl.bo_unreference = (bo_unreference_t)brw_bo_unreference;
	perf_cfg->vtbl.bo_map = (bo_map_t)brw_bo_map;
	perf_cfg->vtbl.bo_unmap = (bo_unmap_t)brw_bo_unmap;
	perf_cfg->vtbl.emit_stall_at_pixel_scoreboard =
	(emit_mi_flush_t)brw_oa_emit_stall_at_pixel_scoreboard;
	perf_cfg->vtbl.emit_mi_report_perf_count =
	(emit_mi_report_t)brw_oa_emit_mi_report_perf_count;
	perf_cfg->vtbl.batchbuffer_flush = brw_oa_batchbuffer_flush;
	perf_cfg->vtbl.store_register_mem =
	(store_register_mem_t) brw_perf_store_register;
	perf_cfg->vtbl.batch_references = (batch_references_t)brw_batch_references;
	perf_cfg->vtbl.bo_wait_rendering = (bo_wait_rendering_t)brw_bo_wait_rendering;
	perf_cfg->vtbl.bo_busy = (bo_busy_t)brw_bo_busy;

	gen_perf_init_context(perf_ctx, perf_cfg, brw, brw->bufmgr, devinfo,
	brw->hw_ctx, brw->screen->fd);
	gen_perf_init_metrics(perf_cfg, devinfo, brw->screen->fd,
	true /* pipeline stats */);

	return perf_cfg->n_queries;
	}

	void
	brw_init_performance_queries(struct brw_context *brw)
	{
	struct gl_context *ctx = &brw->ctx;

	ctx->Driver.InitPerfQueryInfo = brw_init_perf_query_info;
	ctx->Driver.GetPerfQueryInfo = brw_get_perf_query_info;
	ctx->Driver.GetPerfCounterInfo = brw_get_perf_counter_info;
	ctx->Driver.NewPerfQueryObject = brw_new_perf_query_object;
	ctx->Driver.DeletePerfQuery = brw_delete_perf_query;
	ctx->Driver.BeginPerfQuery = brw_begin_perf_query;
	ctx->Driver.EndPerfQuery = brw_end_perf_query;
	ctx->Driver.WaitPerfQuery = brw_wait_perf_query;
	ctx->Driver.IsPerfQueryReady = brw_is_perf_query_ready;
	ctx->Driver.GetPerfQueryData = brw_get_perf_query_data;
	}