src/gallium/drivers/freedreno/freedreno_query_hw.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "pipe/p_state.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_inlines.h"
  32
  33 #include "freedreno_query_hw.h"
  34 #include "freedreno_context.h"
  35 #include "freedreno_util.h"
  36
  37 struct fd_hw_sample_period {
  38         struct fd_hw_sample *start, *end;
  39         struct list_head list;
  40 };
  41
  42 /* maps query_type to sample provider idx: */
  43 static int pidx(unsigned query_type)
  44 {
  45         switch (query_type) {
  46         case PIPE_QUERY_OCCLUSION_COUNTER:
  47                 return 0;
  48         case PIPE_QUERY_OCCLUSION_PREDICATE:
  49                 return 1;
  50         default:
  51                 return -1;
  52         }
  53 }
  54
  55 static struct fd_hw_sample *
  56 get_sample(struct fd_context *ctx, struct fd_ringbuffer *ring,
  57                 unsigned query_type)
  58 {
  59         struct fd_hw_sample *samp = NULL;
  60         int idx = pidx(query_type);
  61
  62         if (!ctx->sample_cache[idx]) {
  63                 ctx->sample_cache[idx] =
  64                         ctx->sample_providers[idx]->get_sample(ctx, ring);
  65         }
  66
  67         fd_hw_sample_reference(ctx, &samp, ctx->sample_cache[idx]);
  68
  69         return samp;
  70 }
  71
  72 static void
  73 clear_sample_cache(struct fd_context *ctx)
  74 {
  75         int i;
  76
  77         for (i = 0; i < ARRAY_SIZE(ctx->sample_cache); i++)
  78                 fd_hw_sample_reference(ctx, &ctx->sample_cache[i], NULL);
  79 }
  80
  81 static bool
  82 is_active(struct fd_hw_query *hq, enum fd_render_stage stage)
  83 {
  84         return !!(hq->provider->active & stage);
  85 }
  86
  87
  88 static void
  89 resume_query(struct fd_context *ctx, struct fd_hw_query *hq,
  90                 struct fd_ringbuffer *ring)
  91 {
  92         assert(!hq->period);
  93         hq->period = util_slab_alloc(&ctx->sample_period_pool);
  94         list_inithead(&hq->period->list);
  95         hq->period->start = get_sample(ctx, ring, hq->base.type);
  96         /* NOTE: util_slab_alloc() does not zero out the buffer: */
  97         hq->period->end = NULL;
  98 }
  99
 100 static void
 101 pause_query(struct fd_context *ctx, struct fd_hw_query *hq,
 102                 struct fd_ringbuffer *ring)
 103 {
 104         assert(hq->period && !hq->period->end);
 105         hq->period->end = get_sample(ctx, ring, hq->base.type);
 106         list_addtail(&hq->period->list, &hq->current_periods);
 107         hq->period = NULL;
 108 }
 109
 110 static void
 111 destroy_periods(struct fd_context *ctx, struct list_head *list)
 112 {
 113         struct fd_hw_sample_period *period, *s;
 114         LIST_FOR_EACH_ENTRY_SAFE(period, s, list, list) {
 115                 fd_hw_sample_reference(ctx, &period->start, NULL);
 116                 fd_hw_sample_reference(ctx, &period->end, NULL);
 117                 list_del(&period->list);
 118                 util_slab_free(&ctx->sample_period_pool, period);
 119         }
 120 }
 121
 122 static void
 123 fd_hw_destroy_query(struct fd_context *ctx, struct fd_query *q)
 124 {
 125         struct fd_hw_query *hq = fd_hw_query(q);
 126
 127         destroy_periods(ctx, &hq->periods);
 128         destroy_periods(ctx, &hq->current_periods);
 129         list_del(&hq->list);
 130
 131         free(hq);
 132 }
 133
 134 static boolean
 135 fd_hw_begin_query(struct fd_context *ctx, struct fd_query *q)
 136 {
 137         struct fd_hw_query *hq = fd_hw_query(q);
 138         if (q->active)
 139                 return false;
 140
 141         /* begin_query() should clear previous results: */
 142         destroy_periods(ctx, &hq->periods);
 143
 144         if (is_active(hq, ctx->stage))
 145                 resume_query(ctx, hq, ctx->ring);
 146
 147         q->active = true;
 148
 149         /* add to active list: */
 150         list_del(&hq->list);
 151         list_addtail(&hq->list, &ctx->active_queries);
 152    return true;
 153 }
 154
 155 static void
 156 fd_hw_end_query(struct fd_context *ctx, struct fd_query *q)
 157 {
 158         struct fd_hw_query *hq = fd_hw_query(q);
 159         if (!q->active)
 160                 return;
 161         if (is_active(hq, ctx->stage))
 162                 pause_query(ctx, hq, ctx->ring);
 163         q->active = false;
 164         /* move to current list: */
 165         list_del(&hq->list);
 166         list_addtail(&hq->list, &ctx->current_queries);
 167 }
 168
 169 /* helper to get ptr to specified sample: */
 170 static void * sampptr(struct fd_hw_sample *samp, uint32_t n, void *ptr)
 171 {
 172         return ((char *)ptr) + (samp->tile_stride * n) + samp->offset;
 173 }
 174
 175 static boolean
 176 fd_hw_get_query_result(struct fd_context *ctx, struct fd_query *q,
 177                 boolean wait, union pipe_query_result *result)
 178 {
 179         struct fd_hw_query *hq = fd_hw_query(q);
 180         const struct fd_hw_sample_provider *p = hq->provider;
 181         struct fd_hw_sample_period *period;
 182
 183         if (q->active)
 184                 return false;
 185
 186         /* if the app tries to read back the query result before the
 187          * batch is submitted, that forces us to flush so that there
 188          * are actually results to wait for:
 189          */
 190         if (!LIST_IS_EMPTY(&hq->list)) {
 191                 /* if app didn't actually trigger any cmdstream, then
 192                  * we have nothing to do:
 193                  */
 194                 if (!ctx->needs_flush)
 195                         return true;
 196                 DBG("reading query result forces flush!");
 197                 fd_context_render(&ctx->base);
 198         }
 199
 200         util_query_clear_result(result, q->type);
 201
 202         if (LIST_IS_EMPTY(&hq->periods))
 203                 return true;
 204
 205         assert(LIST_IS_EMPTY(&hq->list));
 206         assert(LIST_IS_EMPTY(&hq->current_periods));
 207         assert(!hq->period);
 208
 209         /* if !wait, then check the last sample (the one most likely to
 210          * not be ready yet) and bail if it is not ready:
 211          */
 212         if (!wait) {
 213                 int ret;
 214
 215                 period = LIST_ENTRY(struct fd_hw_sample_period,
 216                                 hq->periods.prev, list);
 217
 218                 ret = fd_bo_cpu_prep(period->end->bo, ctx->screen->pipe,
 219                                 DRM_FREEDRENO_PREP_READ | DRM_FREEDRENO_PREP_NOSYNC);
 220                 if (ret)
 221                         return false;
 222
 223                 fd_bo_cpu_fini(period->end->bo);
 224         }
 225
 226         /* sum the result across all sample periods: */
 227         LIST_FOR_EACH_ENTRY(period, &hq->periods, list) {
 228                 struct fd_hw_sample *start = period->start;
 229                 struct fd_hw_sample *end = period->end;
 230                 unsigned i;
 231
 232                 /* start and end samples should be from same batch: */
 233                 assert(start->bo == end->bo);
 234                 assert(start->num_tiles == end->num_tiles);
 235
 236                 for (i = 0; i < start->num_tiles; i++) {
 237                         void *ptr;
 238
 239                         fd_bo_cpu_prep(start->bo, ctx->screen->pipe,
 240                                         DRM_FREEDRENO_PREP_READ);
 241
 242                         ptr = fd_bo_map(start->bo);
 243
 244                         p->accumulate_result(ctx, sampptr(period->start, i, ptr),
 245                                         sampptr(period->end, i, ptr), result);
 246
 247                         fd_bo_cpu_fini(start->bo);
 248                 }
 249         }
 250
 251         return true;
 252 }
 253
 254 static const struct fd_query_funcs hw_query_funcs = {
 255                 .destroy_query    = fd_hw_destroy_query,
 256                 .begin_query      = fd_hw_begin_query,
 257                 .end_query        = fd_hw_end_query,
 258                 .get_query_result = fd_hw_get_query_result,
 259 };
 260
 261 struct fd_query *
 262 fd_hw_create_query(struct fd_context *ctx, unsigned query_type)
 263 {
 264         struct fd_hw_query *hq;
 265         struct fd_query *q;
 266         int idx = pidx(query_type);
 267
 268         if ((idx < 0) || !ctx->sample_providers[idx])
 269                 return NULL;
 270
 271         hq = CALLOC_STRUCT(fd_hw_query);
 272         if (!hq)
 273                 return NULL;
 274
 275         hq->provider = ctx->sample_providers[idx];
 276
 277         list_inithead(&hq->periods);
 278         list_inithead(&hq->current_periods);
 279         list_inithead(&hq->list);
 280
 281         q = &hq->base;
 282         q->funcs = &hw_query_funcs;
 283         q->type = query_type;
 284
 285         return q;
 286 }
 287
 288 struct fd_hw_sample *
 289 fd_hw_sample_init(struct fd_context *ctx, uint32_t size)
 290 {
 291         struct fd_hw_sample *samp = util_slab_alloc(&ctx->sample_pool);
 292         pipe_reference_init(&samp->reference, 1);
 293         samp->size = size;
 294         samp->offset = ctx->next_sample_offset;
 295         /* NOTE: util_slab_alloc() does not zero out the buffer: */
 296         samp->bo = NULL;
 297         samp->num_tiles = 0;
 298         samp->tile_stride = 0;
 299         ctx->next_sample_offset += size;
 300         return samp;
 301 }
 302
 303 void
 304 __fd_hw_sample_destroy(struct fd_context *ctx, struct fd_hw_sample *samp)
 305 {
 306         if (samp->bo)
 307                 fd_bo_del(samp->bo);
 308         util_slab_free(&ctx->sample_pool, samp);
 309 }
 310
 311 static void
 312 prepare_sample(struct fd_hw_sample *samp, struct fd_bo *bo,
 313                 uint32_t num_tiles, uint32_t tile_stride)
 314 {
 315         if (samp->bo) {
 316                 assert(samp->bo == bo);
 317                 assert(samp->num_tiles == num_tiles);
 318                 assert(samp->tile_stride == tile_stride);
 319                 return;
 320         }
 321         samp->bo = bo;
 322         samp->num_tiles = num_tiles;
 323         samp->tile_stride = tile_stride;
 324 }
 325
 326 static void
 327 prepare_query(struct fd_hw_query *hq, struct fd_bo *bo,
 328                 uint32_t num_tiles, uint32_t tile_stride)
 329 {
 330         struct fd_hw_sample_period *period, *s;
 331
 332         /* prepare all the samples in the query: */
 333         LIST_FOR_EACH_ENTRY_SAFE(period, s, &hq->current_periods, list) {
 334                 prepare_sample(period->start, bo, num_tiles, tile_stride);
 335                 prepare_sample(period->end, bo, num_tiles, tile_stride);
 336
 337                 /* move from current_periods list to periods list: */
 338                 list_del(&period->list);
 339                 list_addtail(&period->list, &hq->periods);
 340         }
 341 }
 342
 343 static void
 344 prepare_queries(struct fd_context *ctx, struct fd_bo *bo,
 345                 uint32_t num_tiles, uint32_t tile_stride,
 346                 struct list_head *list, bool remove)
 347 {
 348         struct fd_hw_query *hq, *s;
 349         LIST_FOR_EACH_ENTRY_SAFE(hq, s, list, list) {
 350                 prepare_query(hq, bo, num_tiles, tile_stride);
 351                 if (remove)
 352                         list_delinit(&hq->list);
 353         }
 354 }
 355
 356 /* called from gmem code once total storage requirements are known (ie.
 357  * number of samples times number of tiles)
 358  */
 359 void
 360 fd_hw_query_prepare(struct fd_context *ctx, uint32_t num_tiles)
 361 {
 362         uint32_t tile_stride = ctx->next_sample_offset;
 363         struct fd_bo *bo;
 364
 365         if (ctx->query_bo)
 366                 fd_bo_del(ctx->query_bo);
 367
 368         if (tile_stride > 0) {
 369                 bo = fd_bo_new(ctx->dev, tile_stride * num_tiles,
 370                                 DRM_FREEDRENO_GEM_CACHE_WCOMBINE |
 371                                 DRM_FREEDRENO_GEM_TYPE_KMEM);
 372         } else {
 373                 bo = NULL;
 374         }
 375
 376         ctx->query_bo = bo;
 377         ctx->query_tile_stride = tile_stride;
 378
 379         prepare_queries(ctx, bo, num_tiles, tile_stride,
 380                         &ctx->active_queries, false);
 381         prepare_queries(ctx, bo, num_tiles, tile_stride,
 382                         &ctx->current_queries, true);
 383
 384         /* reset things for next batch: */
 385         ctx->next_sample_offset = 0;
 386 }
 387
 388 void
 389 fd_hw_query_prepare_tile(struct fd_context *ctx, uint32_t n,
 390                 struct fd_ringbuffer *ring)
 391 {
 392         uint32_t tile_stride = ctx->query_tile_stride;
 393         uint32_t offset = tile_stride * n;
 394
 395         /* bail if no queries: */
 396         if (tile_stride == 0)
 397                 return;
 398
 399         fd_wfi(ctx, ring);
 400         OUT_PKT0 (ring, HW_QUERY_BASE_REG, 1);
 401         OUT_RELOCW(ring, ctx->query_bo, offset, 0, 0);
 402 }
 403
 404 void
 405 fd_hw_query_set_stage(struct fd_context *ctx, struct fd_ringbuffer *ring,
 406                 enum fd_render_stage stage)
 407 {
 408         /* special case: internal blits (like mipmap level generation)
 409          * go through normal draw path (via util_blitter_blit()).. but
 410          * we need to ignore the FD_STAGE_DRAW which will be set, so we
 411          * don't enable queries which should be paused during internal
 412          * blits:
 413          */
 414         if ((ctx->stage == FD_STAGE_BLIT) &&
 415                         (stage != FD_STAGE_NULL))
 416                 return;
 417
 418         if (stage != ctx->stage) {
 419                 struct fd_hw_query *hq;
 420                 LIST_FOR_EACH_ENTRY(hq, &ctx->active_queries, list) {
 421                         bool was_active = is_active(hq, ctx->stage);
 422                         bool now_active = is_active(hq, stage);
 423
 424                         if (now_active && !was_active)
 425                                 resume_query(ctx, hq, ring);
 426                         else if (was_active && !now_active)
 427                                 pause_query(ctx, hq, ring);
 428                 }
 429         }
 430         clear_sample_cache(ctx);
 431         ctx->stage = stage;
 432 }
 433
 434 void
 435 fd_hw_query_register_provider(struct pipe_context *pctx,
 436                 const struct fd_hw_sample_provider *provider)
 437 {
 438         struct fd_context *ctx = fd_context(pctx);
 439         int idx = pidx(provider->query_type);
 440
 441         assert((0 <= idx) && (idx < MAX_HW_SAMPLE_PROVIDERS));
 442         assert(!ctx->sample_providers[idx]);
 443
 444         ctx->sample_providers[idx] = provider;
 445 }
 446
 447 void
 448 fd_hw_query_init(struct pipe_context *pctx)
 449 {
 450         struct fd_context *ctx = fd_context(pctx);
 451
 452         util_slab_create(&ctx->sample_pool, sizeof(struct fd_hw_sample),
 453                         16, UTIL_SLAB_SINGLETHREADED);
 454         util_slab_create(&ctx->sample_period_pool, sizeof(struct fd_hw_sample_period),
 455                         16, UTIL_SLAB_SINGLETHREADED);
 456         list_inithead(&ctx->active_queries);
 457         list_inithead(&ctx->current_queries);
 458 }
 459
 460 void
 461 fd_hw_query_fini(struct pipe_context *pctx)
 462 {
 463         struct fd_context *ctx = fd_context(pctx);
 464
 465         util_slab_destroy(&ctx->sample_pool);
 466         util_slab_destroy(&ctx->sample_period_pool);
 467 }