d31b9dd896b98a801e27f70482f914f4d458880a
[mesa.git] / src / gallium / drivers / v3d / v3d_query.c
1 /*
2 * Copyright © 2014 Broadcom
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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 /**
25 * Gallium query object support.
26 *
27 * The HW has native support for occlusion queries, with the query result
28 * being loaded and stored by the TLB unit. From a SW perspective, we have to
29 * be careful to make sure that the jobs that need to be tracking queries are
30 * bracketed by the start and end of counting, even across FBO transitions.
31 *
32 * For the transform feedback PRIMITIVES_GENERATED/WRITTEN queries, we have to
33 * do the calculations in software at draw time.
34 */
35
36 #include "v3d_context.h"
37 #include "broadcom/cle/v3d_packet_v33_pack.h"
38
39 struct v3d_query
40 {
41 enum pipe_query_type type;
42 struct v3d_bo *bo;
43
44 uint32_t start, end;
45 };
46
47 static struct pipe_query *
48 v3d_create_query(struct pipe_context *pctx, unsigned query_type, unsigned index)
49 {
50 struct v3d_query *q = calloc(1, sizeof(*q));
51
52 q->type = query_type;
53
54 /* Note that struct pipe_query isn't actually defined anywhere. */
55 return (struct pipe_query *)q;
56 }
57
58 static void
59 v3d_destroy_query(struct pipe_context *pctx, struct pipe_query *query)
60 {
61 struct v3d_query *q = (struct v3d_query *)query;
62
63 v3d_bo_unreference(&q->bo);
64 free(q);
65 }
66
67 static bool
68 v3d_begin_query(struct pipe_context *pctx, struct pipe_query *query)
69 {
70 struct v3d_context *v3d = v3d_context(pctx);
71 struct v3d_query *q = (struct v3d_query *)query;
72
73 switch (q->type) {
74 case PIPE_QUERY_PRIMITIVES_GENERATED:
75 q->start = v3d->prims_generated;
76 break;
77 case PIPE_QUERY_PRIMITIVES_EMITTED:
78 q->start = v3d->tf_prims_generated;
79 break;
80 case PIPE_QUERY_OCCLUSION_COUNTER:
81 case PIPE_QUERY_OCCLUSION_PREDICATE:
82 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
83 q->bo = v3d_bo_alloc(v3d->screen, 4096, "query");
84 uint32_t *map = v3d_bo_map(q->bo);
85 *map = 0;
86
87 v3d->current_oq = q->bo;
88 v3d->dirty |= VC5_DIRTY_OQ;
89 break;
90 default:
91 unreachable("unsupported query type");
92 }
93
94 return true;
95 }
96
97 static bool
98 v3d_end_query(struct pipe_context *pctx, struct pipe_query *query)
99 {
100 struct v3d_context *v3d = v3d_context(pctx);
101 struct v3d_query *q = (struct v3d_query *)query;
102
103 switch (q->type) {
104 case PIPE_QUERY_PRIMITIVES_GENERATED:
105 q->end = v3d->prims_generated;
106 break;
107 case PIPE_QUERY_PRIMITIVES_EMITTED:
108 q->end = v3d->tf_prims_generated;
109 break;
110 case PIPE_QUERY_OCCLUSION_COUNTER:
111 case PIPE_QUERY_OCCLUSION_PREDICATE:
112 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
113 v3d->current_oq = NULL;
114 v3d->dirty |= VC5_DIRTY_OQ;
115 break;
116 default:
117 unreachable("unsupported query type");
118 }
119
120 return true;
121 }
122
123 static bool
124 v3d_get_query_result(struct pipe_context *pctx, struct pipe_query *query,
125 bool wait, union pipe_query_result *vresult)
126 {
127 struct v3d_context *v3d = v3d_context(pctx);
128 struct v3d_query *q = (struct v3d_query *)query;
129 uint32_t result = 0;
130
131 if (q->bo) {
132 v3d_flush_jobs_using_bo(v3d, q->bo);
133
134 if (wait) {
135 if (!v3d_bo_wait(q->bo, 0, "query"))
136 return false;
137 } else {
138 if (!v3d_bo_wait(q->bo, ~0ull, "query"))
139 return false;
140 }
141
142 /* XXX: Sum up per-core values. */
143 uint32_t *map = v3d_bo_map(q->bo);
144 result = *map;
145
146 v3d_bo_unreference(&q->bo);
147 }
148
149 switch (q->type) {
150 case PIPE_QUERY_OCCLUSION_COUNTER:
151 vresult->u64 = result;
152 break;
153 case PIPE_QUERY_OCCLUSION_PREDICATE:
154 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
155 vresult->b = result != 0;
156 break;
157 case PIPE_QUERY_PRIMITIVES_GENERATED:
158 case PIPE_QUERY_PRIMITIVES_EMITTED:
159 vresult->u64 = q->end - q->start;
160 break;
161 default:
162 unreachable("unsupported query type");
163 }
164
165 return true;
166 }
167
168 static void
169 v3d_set_active_query_state(struct pipe_context *pctx, bool enable)
170 {
171 struct v3d_context *v3d = v3d_context(pctx);
172
173 v3d->active_queries = enable;
174 v3d->dirty |= VC5_DIRTY_OQ;
175 v3d->dirty |= VC5_DIRTY_STREAMOUT;
176 }
177
178 void
179 v3d_query_init(struct pipe_context *pctx)
180 {
181 pctx->create_query = v3d_create_query;
182 pctx->destroy_query = v3d_destroy_query;
183 pctx->begin_query = v3d_begin_query;
184 pctx->end_query = v3d_end_query;
185 pctx->get_query_result = v3d_get_query_result;
186 pctx->set_active_query_state = v3d_set_active_query_state;
187 }
188