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_query.h"
37
38 struct v3d_query_pipe
39 {
40 struct v3d_query base;
41
42 enum pipe_query_type type;
43 struct v3d_bo *bo;
44
45 uint32_t start, end;
46 };
47
48 static void
v3d_destroy_query_pipe(struct v3d_context * v3d,struct v3d_query * query)49 v3d_destroy_query_pipe(struct v3d_context *v3d, struct v3d_query *query)
50 {
51 struct v3d_query_pipe *pquery = (struct v3d_query_pipe *)query;
52
53 v3d_bo_unreference(&pquery->bo);
54 free(pquery);
55 }
56
57 static bool
v3d_begin_query_pipe(struct v3d_context * v3d,struct v3d_query * query)58 v3d_begin_query_pipe(struct v3d_context *v3d, struct v3d_query *query)
59 {
60 struct v3d_query_pipe *pquery = (struct v3d_query_pipe *)query;
61
62 switch (pquery->type) {
63 case PIPE_QUERY_PRIMITIVES_GENERATED:
64 /* If we are using PRIMITIVE_COUNTS_FEEDBACK to retrieve
65 * primitive counts from the GPU (which we need when a GS
66 * is present), then we need to update our counters now
67 * to discard any primitives generated before this.
68 */
69 if (v3d->prog.gs)
70 v3d_update_primitive_counters(v3d);
71 pquery->start = v3d->prims_generated;
72 v3d->n_primitives_generated_queries_in_flight++;
73 break;
74 case PIPE_QUERY_PRIMITIVES_EMITTED:
75 /* If we are inside transform feedback we need to update the
76 * primitive counts to skip primitives recorded before this.
77 */
78 if (v3d->streamout.num_targets > 0)
79 v3d_update_primitive_counters(v3d);
80 pquery->start = v3d->tf_prims_generated;
81 break;
82 case PIPE_QUERY_OCCLUSION_COUNTER:
83 case PIPE_QUERY_OCCLUSION_PREDICATE:
84 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
85 v3d_bo_unreference(&pquery->bo);
86 pquery->bo = v3d_bo_alloc(v3d->screen, 4096, "query");
87 uint32_t *map = v3d_bo_map(pquery->bo);
88 *map = 0;
89
90 v3d->current_oq = pquery->bo;
91 v3d->dirty |= V3D_DIRTY_OQ;
92 break;
93 default:
94 unreachable("unsupported query type");
95 }
96
97 return true;
98 }
99
100 static bool
v3d_end_query_pipe(struct v3d_context * v3d,struct v3d_query * query)101 v3d_end_query_pipe(struct v3d_context *v3d, struct v3d_query *query)
102 {
103 struct v3d_query_pipe *pquery = (struct v3d_query_pipe *)query;
104
105 switch (pquery->type) {
106 case PIPE_QUERY_PRIMITIVES_GENERATED:
107 /* If we are using PRIMITIVE_COUNTS_FEEDBACK to retrieve
108 * primitive counts from the GPU (which we need when a GS
109 * is present), then we need to update our counters now.
110 */
111 if (v3d->prog.gs)
112 v3d_update_primitive_counters(v3d);
113 pquery->end = v3d->prims_generated;
114 v3d->n_primitives_generated_queries_in_flight--;
115 break;
116 case PIPE_QUERY_PRIMITIVES_EMITTED:
117 /* If transform feedback has ended, then we have already
118 * updated the primitive counts at glEndTransformFeedback()
119 * time. Otherwise, we have to do it now.
120 */
121 if (v3d->streamout.num_targets > 0)
122 v3d_update_primitive_counters(v3d);
123 pquery->end = v3d->tf_prims_generated;
124 break;
125 case PIPE_QUERY_OCCLUSION_COUNTER:
126 case PIPE_QUERY_OCCLUSION_PREDICATE:
127 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
128 v3d->current_oq = NULL;
129 v3d->dirty |= V3D_DIRTY_OQ;
130 break;
131 default:
132 unreachable("unsupported query type");
133 }
134
135 return true;
136 }
137
138 static bool
v3d_get_query_result_pipe(struct v3d_context * v3d,struct v3d_query * query,bool wait,union pipe_query_result * vresult)139 v3d_get_query_result_pipe(struct v3d_context *v3d, struct v3d_query *query,
140 bool wait, union pipe_query_result *vresult)
141 {
142 struct v3d_query_pipe *pquery = (struct v3d_query_pipe *)query;
143 uint32_t result = 0;
144
145 if (pquery->bo) {
146 v3d_flush_jobs_using_bo(v3d, pquery->bo);
147
148 if (wait) {
149 if (!v3d_bo_wait(pquery->bo, ~0ull, "query"))
150 return false;
151 } else {
152 if (!v3d_bo_wait(pquery->bo, 0, "query"))
153 return false;
154 }
155
156 /* XXX: Sum up per-core values. */
157 uint32_t *map = v3d_bo_map(pquery->bo);
158 result = *map;
159
160 v3d_bo_unreference(&pquery->bo);
161 }
162
163 switch (pquery->type) {
164 case PIPE_QUERY_OCCLUSION_COUNTER:
165 vresult->u64 = result;
166 break;
167 case PIPE_QUERY_OCCLUSION_PREDICATE:
168 case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
169 vresult->b = result != 0;
170 break;
171 case PIPE_QUERY_PRIMITIVES_GENERATED:
172 case PIPE_QUERY_PRIMITIVES_EMITTED:
173 vresult->u64 = pquery->end - pquery->start;
174 break;
175 default:
176 unreachable("unsupported query type");
177 }
178
179 return true;
180 }
181
182 static const struct v3d_query_funcs pipe_query_funcs = {
183 .destroy_query = v3d_destroy_query_pipe,
184 .begin_query = v3d_begin_query_pipe,
185 .end_query = v3d_end_query_pipe,
186 .get_query_result = v3d_get_query_result_pipe,
187 };
188
189 struct pipe_query *
v3d_create_query_pipe(struct v3d_context * v3d,unsigned query_type,unsigned index)190 v3d_create_query_pipe(struct v3d_context *v3d, unsigned query_type, unsigned index)
191 {
192 if (query_type >= PIPE_QUERY_DRIVER_SPECIFIC)
193 return NULL;
194
195 struct v3d_query_pipe *pquery = calloc(1, sizeof(*pquery));
196 struct v3d_query *query = &pquery->base;
197
198 pquery->type = query_type;
199 query->funcs = &pipe_query_funcs;
200
201 /* Note that struct pipe_query isn't actually defined anywhere. */
202 return (struct pipe_query *)query;
203 }
204