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_query* q = CALLOC_STRUCT(r300_query);
  29
  30     q->type = query_type;
  31     assert(q->type == PIPE_QUERY_OCCLUSION_COUNTER);
  32
  33     /* XXX this is to force winsys to give us a GTT buffer */
  34     q->buf = pipe->screen->buffer_create(pipe->screen, 64,
  35             PIPE_BUFFER_USAGE_VERTEX, 64);
  36
  37     return (struct pipe_query*)q;
  38 }
  39
  40 static void r300_destroy_query(struct pipe_context* pipe,
  41                                struct pipe_query* query)
  42 {
  43     FREE(query);
  44 }
  45
  46 static void r300_begin_query(struct pipe_context* pipe,
  47                              struct pipe_query* query)
  48 {
  49     uint32_t* map;
  50     struct r300_context* r300 = r300_context(pipe);
  51     struct r300_query* q = (struct r300_query*)query;
  52     CS_LOCALS(r300);
  53
  54     map = pipe_buffer_map(pipe->screen, q->buf, PIPE_BUFFER_USAGE_CPU_WRITE);
  55     *map = ~0;
  56     pipe_buffer_unmap(pipe->screen, q->buf);
  57
  58     BEGIN_CS(2);
  59     OUT_CS_REG(R300_ZB_ZPASS_DATA, 0);
  60     END_CS;
  61 }
  62
  63 static void r300_end_query(struct pipe_context* pipe,
  64                            struct pipe_query* query)
  65 {
  66     struct r300_context* r300 = r300_context(pipe);
  67     struct r300_query* q = (struct r300_query*)query;
  68     CS_LOCALS(r300);
  69
  70     BEGIN_CS(4);
  71     OUT_CS_REG_SEQ(R300_ZB_ZPASS_ADDR, 1);
  72     OUT_CS_RELOC(q->buf, 0, 0, RADEON_GEM_DOMAIN_GTT, 0);
  73     END_CS;
  74 }
  75
  76 static boolean r300_get_query_result(struct pipe_context* pipe,
  77                                      struct pipe_query* query,
  78                                      boolean wait,
  79                                      uint64_t* result)
  80 {
  81     struct r300_query* q = (struct r300_query*)query;
  82     uint32_t* map;
  83     uint32_t temp;
  84
  85     if (wait) {
  86         /* Well, we're expected to just sit here and spin, so let's go ahead
  87          * and flush so we can be sure that the card's spinning... */
  88         /* XXX double-check these params */
  89         pipe->flush(pipe, 0, NULL);
  90     }
  91
  92     map = pipe_buffer_map(pipe->screen, q->buf, PIPE_BUFFER_USAGE_CPU_READ);
  93     temp = *map;
  94     pipe_buffer_unmap(pipe->screen, q->buf);
  95
  96     if (temp < 0) {
  97         /* Our results haven't been written yet... */
  98         return FALSE;
  99     }
 100
 101     *result = temp;
 102     return TRUE;
 103 }
 104
 105 void r300_init_query_functions(struct r300_context* r300) {
 106     r300->context.create_query = r300_create_query;
 107     r300->context.destroy_query = r300_destroy_query;
 108     r300->context.begin_query = r300_begin_query;
 109     r300->context.end_query = r300_end_query;
 110     r300->context.get_query_result = r300_get_query_result;
 111 }