src/gallium/drivers/nv50/nv50_query.c

   1 /*
   2  * Copyright 2008 Ben Skeggs
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include "pipe/p_context.h"
  24 #include "pipe/p_inlines.h"
  25
  26 #include "nv50_context.h"
  27
  28 struct nv50_query {
  29         struct pipe_buffer *buffer;
  30         unsigned type;
  31         boolean ready;
  32         uint64_t result;
  33 };
  34
  35 static INLINE struct nv50_query *
  36 nv50_query(struct pipe_query *pipe)
  37 {
  38         return (struct nv50_query *)pipe;
  39 }
  40
  41 static struct pipe_query *
  42 nv50_query_create(struct pipe_context *pipe, unsigned type)
  43 {
  44         struct pipe_screen *screen = pipe->winsys;
  45         struct nv50_query *q = CALLOC_STRUCT(nv50_query);
  46
  47         assert (q->type == PIPE_QUERY_OCCLUSION_COUNTER);
  48         q->type = type;
  49
  50         q->buffer = screen->buffer_create(screen, 256, 0, 16);
  51         if (!q->buffer) {
  52                 FREE(q);
  53                 return NULL;
  54         }
  55
  56         return (struct pipe_query *)q;
  57 }
  58
  59 static void
  60 nv50_query_destroy(struct pipe_context *pipe, struct pipe_query *pq)
  61 {
  62         struct nv50_query *q = nv50_query(pq);
  63
  64         if (q) {
  65                 pipe_buffer_reference(&q->buffer, NULL);
  66                 FREE(q);
  67         }
  68 }
  69
  70 static void
  71 nv50_query_begin(struct pipe_context *pipe, struct pipe_query *pq)
  72 {
  73         struct nv50_context *nv50 = nv50_context(pipe);
  74         struct nouveau_channel *chan = nv50->screen->nvws->channel;
  75         struct nouveau_grobj *tesla = nv50->screen->tesla;
  76         struct nv50_query *q = nv50_query(pq);
  77
  78         BEGIN_RING(chan, tesla, 0x1530, 1);
  79         OUT_RING  (chan, 1);
  80         BEGIN_RING(chan, tesla, 0x1514, 1);
  81         OUT_RING  (chan, 1);
  82
  83         q->ready = FALSE;
  84 }
  85
  86 static void
  87 nv50_query_end(struct pipe_context *pipe, struct pipe_query *pq)
  88 {
  89         struct nv50_context *nv50 = nv50_context(pipe);
  90         struct nouveau_channel *chan = nv50->screen->nvws->channel;
  91         struct nouveau_grobj *tesla = nv50->screen->tesla;
  92         struct nv50_query *q = nv50_query(pq);
  93         struct nouveau_bo *bo = nv50->screen->nvws->get_bo(q->buffer);
  94
  95         WAIT_RING (chan, 5);
  96         BEGIN_RING(chan, tesla, 0x1b00, 4);
  97         OUT_RELOCh(chan, bo, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
  98         OUT_RELOCl(chan, bo, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
  99         OUT_RING  (chan, 0x00000000);
 100         OUT_RING  (chan, 0x0100f002);
 101         FIRE_RING (chan);
 102 }
 103
 104 static boolean
 105 nv50_query_result(struct pipe_context *pipe, struct pipe_query *pq,
 106                   boolean wait, uint64_t *result)
 107 {
 108         struct pipe_winsys *ws = pipe->winsys;
 109         struct nv50_query *q = nv50_query(pq);
 110
 111         /*XXX: Want to be able to return FALSE here instead of blocking
 112          *     until the result is available..
 113          */
 114
 115         if (!q->ready) {
 116                 uint32_t *map = ws->buffer_map(ws, q->buffer,
 117                                                PIPE_BUFFER_USAGE_CPU_READ);
 118                 q->result = map[1];
 119                 q->ready = TRUE;
 120                 ws->buffer_unmap(ws, q->buffer);
 121         }
 122
 123         *result = q->result;
 124         return q->ready;
 125 }
 126
 127 void
 128 nv50_init_query_functions(struct nv50_context *nv50)
 129 {
 130         nv50->pipe.create_query = nv50_query_create;
 131         nv50->pipe.destroy_query = nv50_query_destroy;
 132         nv50->pipe.begin_query = nv50_query_begin;
 133         nv50->pipe.end_query = nv50_query_end;
 134         nv50->pipe.get_query_result = nv50_query_result;
 135 }