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