src/gallium/drivers/r300/r300_query.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "util/u_memory.h"
  24 #include "util/u_simple_list.h"
  25
  26 #include "r300_context.h"
  27 #include "r300_screen.h"
  28 #include "r300_emit.h"
  29
  30 #include <stdio.h>
  31
  32 static struct pipe_query *r300_create_query(struct pipe_context *pipe,
  33                                             unsigned query_type)
  34 {
  35     struct r300_context *r300 = r300_context(pipe);
  36     struct r300_screen *r300screen = r300->screen;
  37     struct r300_query *q;
  38
  39     if (query_type != PIPE_QUERY_OCCLUSION_COUNTER) {
  40         return NULL;
  41     }
  42
  43     q = CALLOC_STRUCT(r300_query);
  44     if (!q)
  45         return NULL;
  46
  47     q->type = query_type;
  48     q->domain = RADEON_DOMAIN_GTT;
  49     q->buffer_size = 4096;
  50
  51     if (r300screen->caps.family == CHIP_FAMILY_RV530)
  52         q->num_pipes = r300screen->caps.num_z_pipes;
  53     else
  54         q->num_pipes = r300screen->caps.num_frag_pipes;
  55
  56     insert_at_tail(&r300->query_list, q);
  57
  58     /* Open up the occlusion query buffer. */
  59     q->buf = r300->rws->buffer_create(r300->rws, q->buffer_size, 4096,
  60                                          PIPE_BIND_CUSTOM, PIPE_USAGE_STREAM,
  61                                          q->domain);
  62     q->cs_buf = r300->rws->buffer_get_cs_handle(q->buf);
  63
  64     return (struct pipe_query*)q;
  65 }
  66
  67 static void r300_destroy_query(struct pipe_context* pipe,
  68                                struct pipe_query* query)
  69 {
  70     struct r300_query* q = r300_query(query);
  71
  72     pb_reference(&q->buf, NULL);
  73     remove_from_list(q);
  74     FREE(query);
  75 }
  76
  77 void r300_resume_query(struct r300_context *r300,
  78                        struct r300_query *query)
  79 {
  80     r300->query_current = query;
  81     r300_mark_atom_dirty(r300, &r300->query_start);
  82 }
  83
  84 static void r300_begin_query(struct pipe_context* pipe,
  85                              struct pipe_query* query)
  86 {
  87     struct r300_context* r300 = r300_context(pipe);
  88     struct r300_query* q = r300_query(query);
  89
  90     if (r300->query_current != NULL) {
  91         fprintf(stderr, "r300: begin_query: "
  92                 "Some other query has already been started.\n");
  93         assert(0);
  94         return;
  95     }
  96
  97     q->num_results = 0;
  98     r300_resume_query(r300, q);
  99 }
 100
 101 void r300_stop_query(struct r300_context *r300)
 102 {
 103     r300_emit_query_end(r300);
 104     r300->query_current = NULL;
 105 }
 106
 107 static void r300_end_query(struct pipe_context* pipe,
 108                            struct pipe_query* query)
 109 {
 110     struct r300_context* r300 = r300_context(pipe);
 111     struct r300_query *q = r300_query(query);
 112
 113     if (q != r300->query_current) {
 114         fprintf(stderr, "r300: end_query: Got invalid query.\n");
 115         assert(0);
 116         return;
 117     }
 118
 119     r300_stop_query(r300);
 120 }
 121
 122 static boolean r300_get_query_result(struct pipe_context* pipe,
 123                                      struct pipe_query* query,
 124                                      boolean wait,
 125                                      void* vresult)
 126 {
 127     struct r300_context* r300 = r300_context(pipe);
 128     struct r300_query *q = r300_query(query);
 129     unsigned i;
 130     uint32_t temp, *map;
 131
 132     map = r300->rws->buffer_map(q->buf, r300->cs,
 133                                 PIPE_TRANSFER_READ |
 134                                 (!wait ? PIPE_TRANSFER_DONTBLOCK : 0));
 135     if (!map)
 136         return FALSE;
 137
 138     /* Sum up the results. */
 139     temp = 0;
 140     for (i = 0; i < q->num_results; i++) {
 141         /* Convert little endian values written by GPU to CPU byte order */
 142         temp += util_le32_to_cpu(*map);
 143         map++;
 144     }
 145
 146     r300->rws->buffer_unmap(q->buf);
 147
 148     *((uint64_t*)vresult) = temp;
 149     return TRUE;
 150 }
 151
 152 static void r300_render_condition(struct pipe_context *pipe,
 153                                   struct pipe_query *query,
 154                                   uint mode)
 155 {
 156     struct r300_context *r300 = r300_context(pipe);
 157     uint64_t result = 0;
 158     boolean wait;
 159
 160     r300->skip_rendering = FALSE;
 161
 162     if (query) {
 163         wait = mode == PIPE_RENDER_COND_WAIT ||
 164                mode == PIPE_RENDER_COND_BY_REGION_WAIT;
 165
 166         if (r300_get_query_result(pipe, query, wait, &result)) {
 167             r300->skip_rendering = result == 0;
 168         }
 169     }
 170 }
 171
 172 void r300_init_query_functions(struct r300_context* r300) {
 173     r300->context.create_query = r300_create_query;
 174     r300->context.destroy_query = r300_destroy_query;
 175     r300->context.begin_query = r300_begin_query;
 176     r300->context.end_query = r300_end_query;
 177     r300->context.get_query_result = r300_get_query_result;
 178     r300->context.render_condition = r300_render_condition;
 179 }