src/gallium/drivers/v3d/v3d_query.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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
  24 /**
  25  * Gallium query object support.
  26  *
  27  * The HW has native support for occlusion queries, with the query result
  28  * being loaded and stored by the TLB unit. From a SW perspective, we have to
  29  * be careful to make sure that the jobs that need to be tracking queries are
  30  * bracketed by the start and end of counting, even across FBO transitions.
  31  *
  32  * For the transform feedback PRIMITIVES_GENERATED/WRITTEN queries, we have to
  33  * do the calculations in software at draw time.
  34  */
  35
  36 #include "v3d_context.h"
  37 #include "broadcom/cle/v3d_packet_v33_pack.h"
  38
  39 struct v3d_query
  40 {
  41         enum pipe_query_type type;
  42         struct v3d_bo *bo;
  43
  44         uint32_t start, end;
  45 };
  46
  47 static struct pipe_query *
  48 v3d_create_query(struct pipe_context *pctx, unsigned query_type, unsigned index)
  49 {
  50         struct v3d_query *q = calloc(1, sizeof(*q));
  51
  52         q->type = query_type;
  53
  54         /* Note that struct pipe_query isn't actually defined anywhere. */
  55         return (struct pipe_query *)q;
  56 }
  57
  58 static void
  59 v3d_destroy_query(struct pipe_context *pctx, struct pipe_query *query)
  60 {
  61         struct v3d_query *q = (struct v3d_query *)query;
  62
  63         v3d_bo_unreference(&q->bo);
  64         free(q);
  65 }
  66
  67 static bool
  68 v3d_begin_query(struct pipe_context *pctx, struct pipe_query *query)
  69 {
  70         struct v3d_context *v3d = v3d_context(pctx);
  71         struct v3d_query *q = (struct v3d_query *)query;
  72
  73         switch (q->type) {
  74         case PIPE_QUERY_PRIMITIVES_GENERATED:
  75                 q->start = v3d->prims_generated;
  76                 break;
  77         case PIPE_QUERY_PRIMITIVES_EMITTED:
  78                 /* If we are inside transform feedback we need to update the
  79                  * primitive counts to skip primtives recorded before this.
  80                  */
  81                 if (v3d->streamout.num_targets > 0)
  82                         v3d_tf_update_counters(v3d);
  83                 q->start = v3d->tf_prims_generated;
  84                 break;
  85         case PIPE_QUERY_OCCLUSION_COUNTER:
  86         case PIPE_QUERY_OCCLUSION_PREDICATE:
  87         case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
  88                 q->bo = v3d_bo_alloc(v3d->screen, 4096, "query");
  89                 uint32_t *map = v3d_bo_map(q->bo);
  90                 *map = 0;
  91
  92                 v3d->current_oq = q->bo;
  93                 v3d->dirty |= VC5_DIRTY_OQ;
  94                 break;
  95         default:
  96                 unreachable("unsupported query type");
  97         }
  98
  99         return true;
 100 }
 101
 102 static bool
 103 v3d_end_query(struct pipe_context *pctx, struct pipe_query *query)
 104 {
 105         struct v3d_context *v3d = v3d_context(pctx);
 106         struct v3d_query *q = (struct v3d_query *)query;
 107
 108         switch (q->type) {
 109         case PIPE_QUERY_PRIMITIVES_GENERATED:
 110                 q->end = v3d->prims_generated;
 111                 break;
 112         case PIPE_QUERY_PRIMITIVES_EMITTED:
 113                 /* If transform feedback has ended, then we have already
 114                  * updated the primitive counts at glEndTransformFeedback()
 115                  * time. Otherwise, we have to do it now.
 116                  */
 117                 if (v3d->streamout.num_targets > 0)
 118                         v3d_tf_update_counters(v3d);
 119                 q->end = v3d->tf_prims_generated;
 120                 break;
 121         case PIPE_QUERY_OCCLUSION_COUNTER:
 122         case PIPE_QUERY_OCCLUSION_PREDICATE:
 123         case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
 124                 v3d->current_oq = NULL;
 125                 v3d->dirty |= VC5_DIRTY_OQ;
 126                 break;
 127         default:
 128                 unreachable("unsupported query type");
 129         }
 130
 131         return true;
 132 }
 133
 134 static bool
 135 v3d_get_query_result(struct pipe_context *pctx, struct pipe_query *query,
 136                      bool wait, union pipe_query_result *vresult)
 137 {
 138         struct v3d_context *v3d = v3d_context(pctx);
 139         struct v3d_query *q = (struct v3d_query *)query;
 140         uint32_t result = 0;
 141
 142         if (q->bo) {
 143                 v3d_flush_jobs_using_bo(v3d, q->bo);
 144
 145                 if (wait) {
 146                         if (!v3d_bo_wait(q->bo, ~0ull, "query"))
 147                                 return false;
 148                 } else {
 149                         if (!v3d_bo_wait(q->bo, 0, "query"))
 150                                 return false;
 151                 }
 152
 153                 /* XXX: Sum up per-core values. */
 154                 uint32_t *map = v3d_bo_map(q->bo);
 155                 result = *map;
 156
 157                 v3d_bo_unreference(&q->bo);
 158         }
 159
 160         switch (q->type) {
 161         case PIPE_QUERY_OCCLUSION_COUNTER:
 162                 vresult->u64 = result;
 163                 break;
 164         case PIPE_QUERY_OCCLUSION_PREDICATE:
 165         case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
 166                 vresult->b = result != 0;
 167                 break;
 168         case PIPE_QUERY_PRIMITIVES_GENERATED:
 169         case PIPE_QUERY_PRIMITIVES_EMITTED:
 170                 vresult->u64 = q->end - q->start;
 171                 break;
 172         default:
 173                 unreachable("unsupported query type");
 174         }
 175
 176         return true;
 177 }
 178
 179 static void
 180 v3d_set_active_query_state(struct pipe_context *pctx, bool enable)
 181 {
 182         struct v3d_context *v3d = v3d_context(pctx);
 183
 184         v3d->active_queries = enable;
 185         v3d->dirty |= VC5_DIRTY_OQ;
 186         v3d->dirty |= VC5_DIRTY_STREAMOUT;
 187 }
 188
 189 void
 190 v3d_query_init(struct pipe_context *pctx)
 191 {
 192         pctx->create_query = v3d_create_query;
 193         pctx->destroy_query = v3d_destroy_query;
 194         pctx->begin_query = v3d_begin_query;
 195         pctx->end_query = v3d_end_query;
 196         pctx->get_query_result = v3d_get_query_result;
 197         pctx->set_active_query_state = v3d_set_active_query_state;
 198 }
 199