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 "r300_query.h"
  24
  25 static struct pipe_query* r300_create_query(struct pipe_context* pipe,
  26                                             unsigned query_type)
  27 {
  28     struct r300_context* r300 = r300_context(pipe);
  29     struct r300_screen* r300screen = r300_screen(r300->context.screen);
  30     unsigned query_size = r300screen->caps->num_frag_pipes * 4;
  31     struct r300_query* q, * qptr;
  32
  33     q = CALLOC_STRUCT(r300_query);
  34
  35     q->type = query_type;
  36     assert(q->type == PIPE_QUERY_OCCLUSION_COUNTER);
  37
  38     q->active = FALSE;
  39
  40     if (!r300->query_list) {
  41         r300->query_list = q;
  42     } else if (!is_empty_list(r300->query_list)) {
  43         qptr = last_elem(r300->query_list);
  44         q->offset = qptr->offset + query_size;
  45         insert_at_tail(r300->query_list, q);
  46     }
  47
  48     /* XXX */
  49     if (q->offset >= 4096) {
  50         q->offset = 0;
  51     }
  52
  53     return (struct pipe_query*)q;
  54 }
  55
  56 static void r300_destroy_query(struct pipe_context* pipe,
  57                                struct pipe_query* query)
  58 {
  59     struct r300_query* q = (struct r300_query*)query;
  60
  61     remove_from_list(q);
  62     FREE(query);
  63 }
  64
  65 static void r300_begin_query(struct pipe_context* pipe,
  66                              struct pipe_query* query)
  67 {
  68     uint32_t* map;
  69     struct r300_context* r300 = r300_context(pipe);
  70     struct r300_query* q = (struct r300_query*)query;
  71
  72     map = pipe->screen->buffer_map(pipe->screen, r300->oqbo,
  73             PIPE_BUFFER_USAGE_CPU_WRITE);
  74     map += q->offset / 4;
  75     *map = ~0;
  76     pipe->screen->buffer_unmap(pipe->screen, r300->oqbo);
  77
  78     r300_emit_dirty_state(r300);
  79     r300_emit_query_begin(r300, q);
  80 }
  81
  82 static void r300_end_query(struct pipe_context* pipe,
  83                            struct pipe_query* query)
  84 {
  85     struct r300_context* r300 = r300_context(pipe);
  86     struct r300_query* q = (struct r300_query*)query;
  87
  88     r300_emit_dirty_state(r300);
  89     r300_emit_query_end(r300, q);
  90 }
  91
  92 static boolean r300_get_query_result(struct pipe_context* pipe,
  93                                      struct pipe_query* query,
  94                                      boolean wait,
  95                                      uint64_t* result)
  96 {
  97     struct r300_context* r300 = r300_context(pipe);
  98     struct r300_screen* r300screen = r300_screen(r300->context.screen);
  99     struct r300_query* q = (struct r300_query*)query;
 100     unsigned flags = PIPE_BUFFER_USAGE_CPU_READ;
 101     uint32_t* map;
 102     uint32_t temp;
 103     unsigned i;
 104
 105     if (wait) {
 106         pipe->flush(pipe, 0, NULL);
 107     } else {
 108         flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 109     }
 110
 111     map = pipe->screen->buffer_map(pipe->screen, r300->oqbo, flags);
 112     map += q->offset / 4;
 113     for (i = 0; i < r300screen->caps->num_frag_pipes; i++) {
 114         if (*map == ~0) {
 115             /* Looks like our results aren't ready yet. */
 116             if (wait) {
 117                 debug_printf("r300: Despite waiting, OQ results haven't"
 118                         " come in yet.\n");
 119             }
 120             temp = ~0;
 121             break;
 122         }
 123         temp += *map;
 124         map++;
 125     }
 126     pipe->screen->buffer_unmap(pipe->screen, r300->oqbo);
 127
 128     if (temp == ~0) {
 129         /* Our results haven't been written yet... */
 130         return FALSE;
 131     }
 132
 133     *result = temp;
 134     return TRUE;
 135 }
 136
 137 void r300_init_query_functions(struct r300_context* r300) {
 138     r300->context.create_query = r300_create_query;
 139     r300->context.destroy_query = r300_destroy_query;
 140     r300->context.begin_query = r300_begin_query;
 141     r300->context.end_query = r300_end_query;
 142     r300->context.get_query_result = r300_get_query_result;
 143 }