nv50_query.c revision 6b3ca672eb85d30d6c28e91000e2cc2231a41bef 
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
28struct nv50_query {
29	struct pipe_buffer *buffer;
30	unsigned type;
31	boolean ready;
32	uint64_t result;
33};
34
35static INLINE struct nv50_query *
36nv50_query(struct pipe_query *pipe)
37{
38	return (struct nv50_query *)pipe;
39}
40
41static struct pipe_query *
42nv50_query_create(struct pipe_context *pipe, unsigned type)
43{
44	struct pipe_screen *screen = pipe->screen;
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
59static void
60nv50_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
70static void
71nv50_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->base.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
86static void
87nv50_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->base.channel;
91	struct nouveau_grobj *tesla = nv50->screen->tesla;
92	struct nv50_query *q = nv50_query(pq);
93	struct nouveau_bo *bo = nouveau_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
104static boolean
105nv50_query_result(struct pipe_context *pipe, struct pipe_query *pq,
106		  boolean wait, uint64_t *result)
107{
108	struct pipe_screen *pscreen = pipe->screen;
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 = pipe_buffer_map(pscreen, q->buffer,
117						PIPE_BUFFER_USAGE_CPU_READ);
118		q->result = map[1];
119		q->ready = TRUE;
120		pipe_buffer_unmap(pscreen, q->buffer);
121	}
122
123	*result = q->result;
124	return q->ready;
125}
126
127void
128nv50_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}
136