src/mesa/drivers/dri/i965/brw_queryobj.c

   1 /*
   2  * Copyright © 2008 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file brw_queryobj.c
  29  *
  30  * Support for query objects (GL_ARB_occlusion_query, GL_ARB_timer_query,
  31  * GL_EXT_transform_feedback, and friends).
  32  *
  33  * The hardware provides a PIPE_CONTROL command that can report the number of
  34  * fragments that passed the depth test, or the hardware timer.  They are
  35  * appropriately synced with the stage of the pipeline for our extensions'
  36  * needs.
  37  */
  38 #include "main/imports.h"
  39
  40 #include "brw_context.h"
  41 #include "brw_defines.h"
  42 #include "brw_state.h"
  43 #include "intel_batchbuffer.h"
  44
  45 uint64_t
  46 brw_timebase_scale(struct brw_context *brw, uint64_t gpu_timestamp)
  47 {
  48    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  49
  50    return (1000000000ull * gpu_timestamp) / devinfo->timestamp_frequency;
  51 }
  52
  53 /* As best we know currently, the Gen HW timestamps are 36bits across
  54  * all platforms, which we need to account for when calculating a
  55  * delta to measure elapsed time.
  56  *
  57  * The timestamps read via glGetTimestamp() / brw_get_timestamp() sometimes
  58  * only have 32bits due to a kernel bug and so in that case we make sure to
  59  * treat all raw timestamps as 32bits so they overflow consistently and remain
  60  * comparable. (Note: the timestamps being passed here are not from the kernel
  61  * so we don't need to be taking the upper 32bits in this buggy kernel case we
  62  * are just clipping to 32bits here for consistency.)
  63  */
  64 uint64_t
  65 brw_raw_timestamp_delta(struct brw_context *brw, uint64_t time0, uint64_t time1)
  66 {
  67    if (brw->screen->hw_has_timestamp == 2) {
  68       /* Kernel clips timestamps to 32bits in this case, so we also clip
  69        * PIPE_CONTROL timestamps for consistency.
  70        */
  71       return (uint32_t)time1 - (uint32_t)time0;
  72    } else {
  73       if (time0 > time1) {
  74          return (1ULL << 36) + time1 - time0;
  75       } else {
  76          return time1 - time0;
  77       }
  78    }
  79 }
  80
  81 /**
  82  * Emit PIPE_CONTROLs to write the current GPU timestamp into a buffer.
  83  */
  84 void
  85 brw_write_timestamp(struct brw_context *brw, struct brw_bo *query_bo, int idx)
  86 {
  87    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  88
  89    if (devinfo->gen == 6) {
  90       /* Emit Sandybridge workaround flush: */
  91       brw_emit_pipe_control_flush(brw,
  92                                   PIPE_CONTROL_CS_STALL |
  93                                   PIPE_CONTROL_STALL_AT_SCOREBOARD);
  94    }
  95
  96    uint32_t flags = PIPE_CONTROL_WRITE_TIMESTAMP;
  97
  98    if (devinfo->gen == 9 && brw->gt == 4)
  99       flags |= PIPE_CONTROL_CS_STALL;
 100
 101    brw_emit_pipe_control_write(brw, flags,
 102                                query_bo, idx * sizeof(uint64_t), 0);
 103 }
 104
 105 /**
 106  * Emit PIPE_CONTROLs to write the PS_DEPTH_COUNT register into a buffer.
 107  */
 108 void
 109 brw_write_depth_count(struct brw_context *brw, struct brw_bo *query_bo, int idx)
 110 {
 111    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 112    uint32_t flags = PIPE_CONTROL_WRITE_DEPTH_COUNT | PIPE_CONTROL_DEPTH_STALL;
 113
 114    if (devinfo->gen == 9 && brw->gt == 4)
 115       flags |= PIPE_CONTROL_CS_STALL;
 116
 117    if (devinfo->gen >= 10) {
 118       /* "Driver must program PIPE_CONTROL with only Depth Stall Enable bit set
 119        * prior to programming a PIPE_CONTROL with Write PS Depth Count Post sync
 120        * operation."
 121        */
 122       brw_emit_pipe_control_flush(brw, PIPE_CONTROL_DEPTH_STALL);
 123    }
 124
 125    brw_emit_pipe_control_write(brw, flags,
 126                                query_bo, idx * sizeof(uint64_t), 0);
 127 }
 128
 129 /**
 130  * Wait on the query object's BO and calculate the final result.
 131  */
 132 static void
 133 brw_queryobj_get_results(struct gl_context *ctx,
 134                          struct brw_query_object *query)
 135 {
 136    struct brw_context *brw = brw_context(ctx);
 137    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 138
 139    int i;
 140    uint64_t *results;
 141
 142    assert(devinfo->gen < 6);
 143
 144    if (query->bo == NULL)
 145       return;
 146
 147    /* If the application has requested the query result, but this batch is
 148     * still contributing to it, flush it now so the results will be present
 149     * when mapped.
 150     */
 151    if (brw_batch_references(&brw->batch, query->bo))
 152       intel_batchbuffer_flush(brw);
 153
 154    if (unlikely(brw->perf_debug)) {
 155       if (brw_bo_busy(query->bo)) {
 156          perf_debug("Stalling on the GPU waiting for a query object.\n");
 157       }
 158    }
 159
 160    results = brw_bo_map(brw, query->bo, MAP_READ);
 161    switch (query->Base.Target) {
 162    case GL_TIME_ELAPSED_EXT:
 163       /* The query BO contains the starting and ending timestamps.
 164        * Subtract the two and convert to nanoseconds.
 165        */
 166       query->Base.Result = brw_raw_timestamp_delta(brw, results[0], results[1]);
 167       query->Base.Result = brw_timebase_scale(brw, query->Base.Result);
 168       break;
 169
 170    case GL_TIMESTAMP:
 171       /* The query BO contains a single timestamp value in results[0]. */
 172       query->Base.Result = brw_timebase_scale(brw, results[0]);
 173
 174       /* Ensure the scaled timestamp overflows according to
 175        * GL_QUERY_COUNTER_BITS
 176        */
 177       query->Base.Result &= (1ull << ctx->Const.QueryCounterBits.Timestamp) - 1;
 178       break;
 179
 180    case GL_SAMPLES_PASSED_ARB:
 181       /* Loop over pairs of values from the BO, which are the PS_DEPTH_COUNT
 182        * value at the start and end of the batchbuffer.  Subtract them to
 183        * get the number of fragments which passed the depth test in each
 184        * individual batch, and add those differences up to get the number
 185        * of fragments for the entire query.
 186        *
 187        * Note that query->Base.Result may already be non-zero.  We may have
 188        * run out of space in the query's BO and allocated a new one.  If so,
 189        * this function was already called to accumulate the results so far.
 190        */
 191       for (i = 0; i < query->last_index; i++) {
 192          query->Base.Result += results[i * 2 + 1] - results[i * 2];
 193       }
 194       break;
 195
 196    case GL_ANY_SAMPLES_PASSED:
 197    case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
 198       /* If the starting and ending PS_DEPTH_COUNT from any of the batches
 199        * differ, then some fragments passed the depth test.
 200        */
 201       for (i = 0; i < query->last_index; i++) {
 202          if (results[i * 2 + 1] != results[i * 2]) {
 203             query->Base.Result = GL_TRUE;
 204             break;
 205          }
 206       }
 207       break;
 208
 209    default:
 210       unreachable("Unrecognized query target in brw_queryobj_get_results()");
 211    }
 212    brw_bo_unmap(query->bo);
 213
 214    /* Now that we've processed the data stored in the query's buffer object,
 215     * we can release it.
 216     */
 217    brw_bo_unreference(query->bo);
 218    query->bo = NULL;
 219 }
 220
 221 /**
 222  * The NewQueryObject() driver hook.
 223  *
 224  * Allocates and initializes a new query object.
 225  */
 226 static struct gl_query_object *
 227 brw_new_query_object(struct gl_context *ctx, GLuint id)
 228 {
 229    struct brw_query_object *query;
 230
 231    query = calloc(1, sizeof(struct brw_query_object));
 232
 233    query->Base.Id = id;
 234    query->Base.Result = 0;
 235    query->Base.Active = false;
 236    query->Base.Ready = true;
 237
 238    return &query->Base;
 239 }
 240
 241 /**
 242  * The DeleteQuery() driver hook.
 243  */
 244 static void
 245 brw_delete_query(struct gl_context *ctx, struct gl_query_object *q)
 246 {
 247    struct brw_query_object *query = (struct brw_query_object *)q;
 248
 249    brw_bo_unreference(query->bo);
 250    free(query);
 251 }
 252
 253 /**
 254  * Gen4-5 driver hook for glBeginQuery().
 255  *
 256  * Initializes driver structures and emits any GPU commands required to begin
 257  * recording data for the query.
 258  */
 259 static void
 260 brw_begin_query(struct gl_context *ctx, struct gl_query_object *q)
 261 {
 262    struct brw_context *brw = brw_context(ctx);
 263    struct brw_query_object *query = (struct brw_query_object *)q;
 264    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 265
 266    assert(devinfo->gen < 6);
 267
 268    switch (query->Base.Target) {
 269    case GL_TIME_ELAPSED_EXT:
 270       /* For timestamp queries, we record the starting time right away so that
 271        * we measure the full time between BeginQuery and EndQuery.  There's
 272        * some debate about whether this is the right thing to do.  Our decision
 273        * is based on the following text from the ARB_timer_query extension:
 274        *
 275        * "(5) Should the extension measure total time elapsed between the full
 276        *      completion of the BeginQuery and EndQuery commands, or just time
 277        *      spent in the graphics library?
 278        *
 279        *  RESOLVED:  This extension will measure the total time elapsed
 280        *  between the full completion of these commands.  Future extensions
 281        *  may implement a query to determine time elapsed at different stages
 282        *  of the graphics pipeline."
 283        *
 284        * We write a starting timestamp now (at index 0).  At EndQuery() time,
 285        * we'll write a second timestamp (at index 1), and subtract the two to
 286        * obtain the time elapsed.  Notably, this includes time elapsed while
 287        * the system was doing other work, such as running other applications.
 288        */
 289       brw_bo_unreference(query->bo);
 290       query->bo = brw_bo_alloc(brw->bufmgr, "timer query", 4096, 4096);
 291       brw_write_timestamp(brw, query->bo, 0);
 292       break;
 293
 294    case GL_ANY_SAMPLES_PASSED:
 295    case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
 296    case GL_SAMPLES_PASSED_ARB:
 297       /* For occlusion queries, we delay taking an initial sample until the
 298        * first drawing occurs in this batch.  See the reasoning in the comments
 299        * for brw_emit_query_begin() below.
 300        *
 301        * Since we're starting a new query, we need to be sure to throw away
 302        * any previous occlusion query results.
 303        */
 304       brw_bo_unreference(query->bo);
 305       query->bo = NULL;
 306       query->last_index = -1;
 307
 308       brw->query.obj = query;
 309
 310       /* Depth statistics on Gen4 require strange workarounds, so we try to
 311        * avoid them when necessary.  They're required for occlusion queries,
 312        * so turn them on now.
 313        */
 314       brw->stats_wm++;
 315       brw->ctx.NewDriverState |= BRW_NEW_STATS_WM;
 316       break;
 317
 318    default:
 319       unreachable("Unrecognized query target in brw_begin_query()");
 320    }
 321 }
 322
 323 /**
 324  * Gen4-5 driver hook for glEndQuery().
 325  *
 326  * Emits GPU commands to record a final query value, ending any data capturing.
 327  * However, the final result isn't necessarily available until the GPU processes
 328  * those commands.  brw_queryobj_get_results() processes the captured data to
 329  * produce the final result.
 330  */
 331 static void
 332 brw_end_query(struct gl_context *ctx, struct gl_query_object *q)
 333 {
 334    struct brw_context *brw = brw_context(ctx);
 335    struct brw_query_object *query = (struct brw_query_object *)q;
 336    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 337
 338    assert(devinfo->gen < 6);
 339
 340    switch (query->Base.Target) {
 341    case GL_TIME_ELAPSED_EXT:
 342       /* Write the final timestamp. */
 343       brw_write_timestamp(brw, query->bo, 1);
 344       break;
 345
 346    case GL_ANY_SAMPLES_PASSED:
 347    case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
 348    case GL_SAMPLES_PASSED_ARB:
 349
 350       /* No query->bo means that EndQuery was called after BeginQuery with no
 351        * intervening drawing. Rather than doing nothing at all here in this
 352        * case, we emit the query_begin and query_end state to the
 353        * hardware. This is to guarantee that waiting on the result of this
 354        * empty state will cause all previous queries to complete at all, as
 355        * required by the specification:
 356        *
 357        *        It must always be true that if any query object
 358        *        returns a result available of TRUE, all queries of the
 359        *        same type issued prior to that query must also return
 360        *        TRUE. [Open GL 4.3 (Core Profile) Section 4.2.1]
 361        */
 362       if (!query->bo) {
 363          brw_emit_query_begin(brw);
 364       }
 365
 366       assert(query->bo);
 367
 368       brw_emit_query_end(brw);
 369
 370       brw->query.obj = NULL;
 371
 372       brw->stats_wm--;
 373       brw->ctx.NewDriverState |= BRW_NEW_STATS_WM;
 374       break;
 375
 376    default:
 377       unreachable("Unrecognized query target in brw_end_query()");
 378    }
 379 }
 380
 381 /**
 382  * The Gen4-5 WaitQuery() driver hook.
 383  *
 384  * Wait for a query result to become available and return it.  This is the
 385  * backing for glGetQueryObjectiv() with the GL_QUERY_RESULT pname.
 386  */
 387 static void brw_wait_query(struct gl_context *ctx, struct gl_query_object *q)
 388 {
 389    struct brw_query_object *query = (struct brw_query_object *)q;
 390    const struct gen_device_info *devinfo = &brw_context(ctx)->screen->devinfo;
 391
 392    assert(devinfo->gen < 6);
 393
 394    brw_queryobj_get_results(ctx, query);
 395    query->Base.Ready = true;
 396 }
 397
 398 /**
 399  * The Gen4-5 CheckQuery() driver hook.
 400  *
 401  * Checks whether a query result is ready yet.  If not, flushes.
 402  * This is the backing for glGetQueryObjectiv()'s QUERY_RESULT_AVAILABLE pname.
 403  */
 404 static void brw_check_query(struct gl_context *ctx, struct gl_query_object *q)
 405 {
 406    struct brw_context *brw = brw_context(ctx);
 407    struct brw_query_object *query = (struct brw_query_object *)q;
 408    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 409
 410    assert(devinfo->gen < 6);
 411
 412    /* From the GL_ARB_occlusion_query spec:
 413     *
 414     *     "Instead of allowing for an infinite loop, performing a
 415     *      QUERY_RESULT_AVAILABLE_ARB will perform a flush if the result is
 416     *      not ready yet on the first time it is queried.  This ensures that
 417     *      the async query will return true in finite time.
 418     */
 419    if (query->bo && brw_batch_references(&brw->batch, query->bo))
 420       intel_batchbuffer_flush(brw);
 421
 422    if (query->bo == NULL || !brw_bo_busy(query->bo)) {
 423       brw_queryobj_get_results(ctx, query);
 424       query->Base.Ready = true;
 425    }
 426 }
 427
 428 /**
 429  * Ensure there query's BO has enough space to store a new pair of values.
 430  *
 431  * If not, gather the existing BO's results and create a new buffer of the
 432  * same size.
 433  */
 434 static void
 435 ensure_bo_has_space(struct gl_context *ctx, struct brw_query_object *query)
 436 {
 437    struct brw_context *brw = brw_context(ctx);
 438    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 439
 440    assert(devinfo->gen < 6);
 441
 442    if (!query->bo || query->last_index * 2 + 1 >= 4096 / sizeof(uint64_t)) {
 443
 444       if (query->bo != NULL) {
 445          /* The old query BO did not have enough space, so we allocated a new
 446           * one.  Gather the results so far (adding up the differences) and
 447           * release the old BO.
 448           */
 449          brw_queryobj_get_results(ctx, query);
 450       }
 451
 452       query->bo = brw_bo_alloc(brw->bufmgr, "query", 4096, 1);
 453       query->last_index = 0;
 454    }
 455 }
 456
 457 /**
 458  * Record the PS_DEPTH_COUNT value (for occlusion queries) just before
 459  * primitive drawing.
 460  *
 461  * In a pre-hardware context world, the single PS_DEPTH_COUNT register is
 462  * shared among all applications using the GPU.  However, our query value
 463  * needs to only include fragments generated by our application/GL context.
 464  *
 465  * To accommodate this, we record PS_DEPTH_COUNT at the start and end of
 466  * each batchbuffer (technically, the first primitive drawn and flush time).
 467  * Subtracting each pair of values calculates the change in PS_DEPTH_COUNT
 468  * caused by a batchbuffer.  Since there is no preemption inside batches,
 469  * this is guaranteed to only measure the effects of our current application.
 470  *
 471  * Adding each of these differences (in case drawing is done over many batches)
 472  * produces the final expected value.
 473  *
 474  * In a world with hardware contexts, PS_DEPTH_COUNT is saved and restored
 475  * as part of the context state, so this is unnecessary, and skipped.
 476  */
 477 void
 478 brw_emit_query_begin(struct brw_context *brw)
 479 {
 480    struct gl_context *ctx = &brw->ctx;
 481    struct brw_query_object *query = brw->query.obj;
 482
 483    if (brw->hw_ctx)
 484       return;
 485
 486    /* Skip if we're not doing any queries, or we've already recorded the
 487     * initial query value for this batchbuffer.
 488     */
 489    if (!query || brw->query.begin_emitted)
 490       return;
 491
 492    ensure_bo_has_space(ctx, query);
 493
 494    brw_write_depth_count(brw, query->bo, query->last_index * 2);
 495
 496    brw->query.begin_emitted = true;
 497 }
 498
 499 /**
 500  * Called at batchbuffer flush to get an ending PS_DEPTH_COUNT
 501  * (for non-hardware context platforms).
 502  *
 503  * See the explanation in brw_emit_query_begin().
 504  */
 505 void
 506 brw_emit_query_end(struct brw_context *brw)
 507 {
 508    struct brw_query_object *query = brw->query.obj;
 509
 510    if (brw->hw_ctx)
 511       return;
 512
 513    if (!brw->query.begin_emitted)
 514       return;
 515
 516    brw_write_depth_count(brw, query->bo, query->last_index * 2 + 1);
 517
 518    brw->query.begin_emitted = false;
 519    query->last_index++;
 520 }
 521
 522 /**
 523  * Driver hook for glQueryCounter().
 524  *
 525  * This handles GL_TIMESTAMP queries, which perform a pipelined read of the
 526  * current GPU time.  This is unlike GL_TIME_ELAPSED, which measures the
 527  * time while the query is active.
 528  */
 529 void
 530 brw_query_counter(struct gl_context *ctx, struct gl_query_object *q)
 531 {
 532    struct brw_context *brw = brw_context(ctx);
 533    struct brw_query_object *query = (struct brw_query_object *) q;
 534
 535    assert(q->Target == GL_TIMESTAMP);
 536
 537    brw_bo_unreference(query->bo);
 538    query->bo = brw_bo_alloc(brw->bufmgr, "timestamp query", 4096, 4096);
 539    brw_write_timestamp(brw, query->bo, 0);
 540
 541    query->flushed = false;
 542 }
 543
 544 /**
 545  * Read the TIMESTAMP register immediately (in a non-pipelined fashion).
 546  *
 547  * This is used to implement the GetTimestamp() driver hook.
 548  */
 549 static uint64_t
 550 brw_get_timestamp(struct gl_context *ctx)
 551 {
 552    struct brw_context *brw = brw_context(ctx);
 553    uint64_t result = 0;
 554
 555    switch (brw->screen->hw_has_timestamp) {
 556    case 3: /* New kernel, always full 36bit accuracy */
 557       brw_reg_read(brw->bufmgr, TIMESTAMP | 1, &result);
 558       break;
 559    case 2: /* 64bit kernel, result is left-shifted by 32bits, losing 4bits */
 560       brw_reg_read(brw->bufmgr, TIMESTAMP, &result);
 561       result = result >> 32;
 562       break;
 563    case 1: /* 32bit kernel, result is 36bit wide but may be inaccurate! */
 564       brw_reg_read(brw->bufmgr, TIMESTAMP, &result);
 565       break;
 566    }
 567
 568    /* Scale to nanosecond units */
 569    result = brw_timebase_scale(brw, result);
 570
 571    /* Ensure the scaled timestamp overflows according to
 572     * GL_QUERY_COUNTER_BITS.  Technically this isn't required if
 573     * querying GL_TIMESTAMP via glGetInteger but it seems best to keep
 574     * QueryObject and GetInteger timestamps consistent.
 575     */
 576    result &= (1ull << ctx->Const.QueryCounterBits.Timestamp) - 1;
 577    return result;
 578 }
 579
 580 /**
 581  * Is this type of query written by PIPE_CONTROL?
 582  */
 583 bool
 584 brw_is_query_pipelined(struct brw_query_object *query)
 585 {
 586    switch (query->Base.Target) {
 587    case GL_TIMESTAMP:
 588    case GL_TIME_ELAPSED:
 589    case GL_ANY_SAMPLES_PASSED:
 590    case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
 591    case GL_SAMPLES_PASSED_ARB:
 592       return true;
 593
 594    case GL_PRIMITIVES_GENERATED:
 595    case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
 596    case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
 597    case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB:
 598    case GL_VERTICES_SUBMITTED_ARB:
 599    case GL_PRIMITIVES_SUBMITTED_ARB:
 600    case GL_VERTEX_SHADER_INVOCATIONS_ARB:
 601    case GL_GEOMETRY_SHADER_INVOCATIONS:
 602    case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB:
 603    case GL_FRAGMENT_SHADER_INVOCATIONS_ARB:
 604    case GL_CLIPPING_INPUT_PRIMITIVES_ARB:
 605    case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB:
 606    case GL_COMPUTE_SHADER_INVOCATIONS_ARB:
 607    case GL_TESS_CONTROL_SHADER_PATCHES_ARB:
 608    case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB:
 609       return false;
 610
 611    default:
 612       unreachable("Unrecognized query target in is_query_pipelined()");
 613    }
 614 }
 615
 616 /* Initialize query object functions used on all generations. */
 617 void brw_init_common_queryobj_functions(struct dd_function_table *functions)
 618 {
 619    functions->NewQueryObject = brw_new_query_object;
 620    functions->DeleteQuery = brw_delete_query;
 621    functions->GetTimestamp = brw_get_timestamp;
 622 }
 623
 624 /* Initialize Gen4/5-specific query object functions. */
 625 void gen4_init_queryobj_functions(struct dd_function_table *functions)
 626 {
 627    functions->BeginQuery = brw_begin_query;
 628    functions->EndQuery = brw_end_query;
 629    functions->CheckQuery = brw_check_query;
 630    functions->WaitQuery = brw_wait_query;
 631    functions->QueryCounter = brw_query_counter;
 632 }