src/gallium/drivers/freedreno/a3xx/fd3_query.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 "freedreno_query_hw.h"
  30 #include "freedreno_context.h"
  31 #include "freedreno_util.h"
  32
  33 #include "fd3_query.h"
  34 #include "fd3_format.h"
  35
  36
  37 struct fd_rb_samp_ctrs {
  38         uint64_t ctr[16];
  39 };
  40
  41 /*
  42  * Occlusion Query:
  43  *
  44  * OCCLUSION_COUNTER and OCCLUSION_PREDICATE differ only in how they
  45  * interpret results
  46  */
  47
  48 static struct fd_hw_sample *
  49 occlusion_get_sample(struct fd_batch *batch, struct fd_ringbuffer *ring)
  50 {
  51         struct fd_hw_sample *samp =
  52                         fd_hw_sample_init(batch, sizeof(struct fd_rb_samp_ctrs));
  53
  54         /* Set RB_SAMPLE_COUNT_ADDR to samp->offset plus value of
  55          * HW_QUERY_BASE_REG register:
  56          */
  57         OUT_PKT3(ring, CP_SET_CONSTANT, 3);
  58         OUT_RING(ring, CP_REG(REG_A3XX_RB_SAMPLE_COUNT_ADDR) | 0x80000000);
  59         OUT_RING(ring, HW_QUERY_BASE_REG);
  60         OUT_RING(ring, samp->offset);
  61
  62         OUT_PKT0(ring, REG_A3XX_RB_SAMPLE_COUNT_CONTROL, 1);
  63         OUT_RING(ring, A3XX_RB_SAMPLE_COUNT_CONTROL_COPY);
  64
  65         OUT_PKT3(ring, CP_DRAW_INDX, 3);
  66         OUT_RING(ring, 0x00000000);
  67         OUT_RING(ring, DRAW(DI_PT_POINTLIST_PSIZE, DI_SRC_SEL_AUTO_INDEX,
  68                                                 INDEX_SIZE_IGN, USE_VISIBILITY, 0));
  69         OUT_RING(ring, 0);             /* NumIndices */
  70
  71         fd_event_write(batch->ctx, ring, ZPASS_DONE);
  72
  73         OUT_PKT0(ring, REG_A3XX_RBBM_PERFCTR_CTL, 1);
  74         OUT_RING(ring, A3XX_RBBM_PERFCTR_CTL_ENABLE);
  75
  76         OUT_PKT0(ring, REG_A3XX_VBIF_PERF_CNT_EN, 1);
  77         OUT_RING(ring, A3XX_VBIF_PERF_CNT_EN_CNT0 |
  78                         A3XX_VBIF_PERF_CNT_EN_CNT1 |
  79                         A3XX_VBIF_PERF_CNT_EN_PWRCNT0 |
  80                         A3XX_VBIF_PERF_CNT_EN_PWRCNT1 |
  81                         A3XX_VBIF_PERF_CNT_EN_PWRCNT2);
  82
  83         return samp;
  84 }
  85
  86 static uint64_t
  87 count_samples(const struct fd_rb_samp_ctrs *start,
  88                 const struct fd_rb_samp_ctrs *end)
  89 {
  90         uint64_t n = 0;
  91         unsigned i;
  92
  93         /* not quite sure what all of these are, possibly different
  94          * counters for each MRT render target:
  95          */
  96         for (i = 0; i < 16; i += 4)
  97                 n += end->ctr[i] - start->ctr[i];
  98
  99         return n;
 100 }
 101
 102 static void
 103 occlusion_counter_accumulate_result(struct fd_context *ctx,
 104                 const void *start, const void *end,
 105                 union pipe_query_result *result)
 106 {
 107         uint64_t n = count_samples(start, end);
 108         result->u64 += n;
 109 }
 110
 111 static void
 112 occlusion_predicate_accumulate_result(struct fd_context *ctx,
 113                 const void *start, const void *end,
 114                 union pipe_query_result *result)
 115 {
 116         uint64_t n = count_samples(start, end);
 117         result->b |= (n > 0);
 118 }
 119
 120 static const struct fd_hw_sample_provider occlusion_counter = {
 121                 .query_type = PIPE_QUERY_OCCLUSION_COUNTER,
 122                 .active = FD_STAGE_DRAW,
 123                 .get_sample = occlusion_get_sample,
 124                 .accumulate_result = occlusion_counter_accumulate_result,
 125 };
 126
 127 static const struct fd_hw_sample_provider occlusion_predicate = {
 128                 .query_type = PIPE_QUERY_OCCLUSION_PREDICATE,
 129                 .active = FD_STAGE_DRAW,
 130                 .get_sample = occlusion_get_sample,
 131                 .accumulate_result = occlusion_predicate_accumulate_result,
 132 };
 133
 134 void fd3_query_context_init(struct pipe_context *pctx)
 135 {
 136         fd_hw_query_register_provider(pctx, &occlusion_counter);
 137         fd_hw_query_register_provider(pctx, &occlusion_predicate);
 138 }