src/gallium/drivers/etnaviv/etnaviv_query_acc_occlusion.c

   1 /*
   2  * Copyright (c) 2017 Etnaviv Project
   3  * Copyright (C) 2017 Zodiac Inflight Innovations
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Rob Clark <robclark@freedesktop.org>
  26  *    Christian Gmeiner <christian.gmeiner@gmail.com>
  27  */
  28
  29 #include "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31
  32 #include "etnaviv_context.h"
  33 #include "etnaviv_debug.h"
  34 #include "etnaviv_emit.h"
  35 #include "etnaviv_query_acc.h"
  36 #include "etnaviv_screen.h"
  37
  38 /*
  39  * Occlusion Query:
  40  *
  41  * OCCLUSION_COUNTER and OCCLUSION_PREDICATE differ only in how they
  42  * interpret results
  43  */
  44
  45 static bool
  46 occlusion_supports(unsigned query_type)
  47 {
  48    switch (query_type) {
  49    case PIPE_QUERY_OCCLUSION_COUNTER:
  50       /* fallthrough */
  51    case PIPE_QUERY_OCCLUSION_PREDICATE:
  52       /* fallthrough */
  53    case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
  54       return true;
  55    default:
  56       return false;
  57    }
  58 }
  59
  60 static struct etna_acc_query *
  61 occlusion_allocate(struct etna_context *ctx, ASSERTED unsigned query_type)
  62 {
  63    return CALLOC_STRUCT(etna_acc_query);
  64 }
  65
  66 static void
  67 occlusion_resume(struct etna_acc_query *aq, struct etna_context *ctx)
  68 {
  69    struct etna_resource *rsc = etna_resource(aq->prsc);
  70    struct etna_reloc r = {
  71       .bo = rsc->bo,
  72       .flags = ETNA_RELOC_WRITE
  73    };
  74
  75    if (aq->samples > 63) {
  76       aq->samples = 63;
  77       BUG("samples overflow");
  78    }
  79
  80    r.offset = aq->samples * 8; /* 64bit value */
  81
  82    etna_set_state_reloc(ctx->stream, VIVS_GL_OCCLUSION_QUERY_ADDR, &r);
  83    resource_written(ctx, aq->prsc);
  84 }
  85
  86 static void
  87 occlusion_suspend(struct etna_acc_query *aq, struct etna_context *ctx)
  88 {
  89    /* 0x1DF5E76 is the value used by blob - but any random value will work */
  90    etna_set_state(ctx->stream, VIVS_GL_OCCLUSION_QUERY_CONTROL, 0x1DF5E76);
  91    resource_written(ctx, aq->prsc);
  92 }
  93
  94 static bool
  95 occlusion_result(struct etna_acc_query *aq, void *buf,
  96                  union pipe_query_result *result)
  97 {
  98    uint64_t sum = 0;
  99    uint64_t *ptr = (uint64_t *)buf;
 100
 101    for (unsigned i = 0; i < aq->samples; i++)
 102       sum += *(ptr + i);
 103
 104    if (aq->base.type == PIPE_QUERY_OCCLUSION_COUNTER)
 105       result->u64 = sum;
 106    else
 107       result->b = !!sum;
 108
 109    return true;
 110 }
 111
 112 const struct etna_acc_sample_provider occlusion_provider = {
 113    .supports = occlusion_supports,
 114    .allocate = occlusion_allocate,
 115    .suspend = occlusion_suspend,
 116    .resume = occlusion_resume,
 117    .result = occlusion_result,
 118 };