2 * Copyright © 2008 Intel Corporation
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:
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
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
24 * Eric Anholt <eric@anholt.net>
28 /** @file support for ARB_query_object
30 * ARB_query_object is implemented by using the PIPE_CONTROL command to stall
31 * execution on the completion of previous depth tests, and write the
32 * current PS_DEPTH_COUNT to a buffer object.
34 * We use before and after counts when drawing during a query so that
35 * we don't pick up other clients' query data in ours. To reduce overhead,
36 * a single BO is used to record the query data for all active queries at
37 * once. This also gives us a simple bound on how much batchbuffer space is
38 * required for handling queries, so that we can be sure that we won't
39 * have to emit a batchbuffer without getting the ending PS_DEPTH_COUNT.
41 #include "main/imports.h"
43 #include "brw_context.h"
44 #include "brw_state.h"
45 #include "intel_batchbuffer.h"
46 #include "intel_reg.h"
48 /** Waits on the query object's BO and totals the results for this query */
50 brw_queryobj_get_results(struct brw_query_object
*query
)
55 if (query
->bo
== NULL
)
58 drm_intel_bo_map(query
->bo
, GL_FALSE
);
59 results
= query
->bo
->virtual;
60 if (query
->Base
.Target
== GL_TIME_ELAPSED_EXT
) {
61 query
->Base
.Result
+= 1000 * ((results
[1] >> 32) - (results
[0] >> 32));
63 /* Map and count the pixels from the current query BO */
64 for (i
= query
->first_index
; i
<= query
->last_index
; i
++) {
65 query
->Base
.Result
+= results
[i
* 2 + 1] - results
[i
* 2];
68 drm_intel_bo_unmap(query
->bo
);
70 drm_intel_bo_unreference(query
->bo
);
74 static struct gl_query_object
*
75 brw_new_query_object(GLcontext
*ctx
, GLuint id
)
77 struct brw_query_object
*query
;
79 query
= calloc(1, sizeof(struct brw_query_object
));
82 query
->Base
.Result
= 0;
83 query
->Base
.Active
= GL_FALSE
;
84 query
->Base
.Ready
= GL_TRUE
;
90 brw_delete_query(GLcontext
*ctx
, struct gl_query_object
*q
)
92 struct brw_query_object
*query
= (struct brw_query_object
*)q
;
94 drm_intel_bo_unreference(query
->bo
);
99 brw_begin_query(GLcontext
*ctx
, struct gl_query_object
*q
)
101 struct brw_context
*brw
= brw_context(ctx
);
102 struct intel_context
*intel
= intel_context(ctx
);
103 struct brw_query_object
*query
= (struct brw_query_object
*)q
;
105 if (query
->Base
.Target
== GL_TIME_ELAPSED_EXT
) {
106 drm_intel_bo_unreference(query
->bo
);
107 query
->bo
= drm_intel_bo_alloc(intel
->bufmgr
, "timer query",
111 OUT_BATCH(_3DSTATE_PIPE_CONTROL
|
112 PIPE_CONTROL_WRITE_TIMESTAMP
);
114 I915_GEM_DOMAIN_INSTRUCTION
, I915_GEM_DOMAIN_INSTRUCTION
,
115 PIPE_CONTROL_GLOBAL_GTT_WRITE
|
121 /* Reset our driver's tracking of query state. */
122 drm_intel_bo_unreference(query
->bo
);
124 query
->first_index
= -1;
125 query
->last_index
= -1;
127 brw
->query
.obj
= query
;
133 * Begin the ARB_occlusion_query query on a query object.
136 brw_end_query(GLcontext
*ctx
, struct gl_query_object
*q
)
138 struct brw_context
*brw
= brw_context(ctx
);
139 struct intel_context
*intel
= intel_context(ctx
);
140 struct brw_query_object
*query
= (struct brw_query_object
*)q
;
142 if (query
->Base
.Target
== GL_TIME_ELAPSED_EXT
) {
144 OUT_BATCH(_3DSTATE_PIPE_CONTROL
|
145 PIPE_CONTROL_WRITE_TIMESTAMP
);
147 I915_GEM_DOMAIN_INSTRUCTION
, I915_GEM_DOMAIN_INSTRUCTION
,
148 PIPE_CONTROL_GLOBAL_GTT_WRITE
|
154 intel_batchbuffer_flush(intel
->batch
);
156 /* Flush the batchbuffer in case it has writes to our query BO.
157 * Have later queries write to a new query BO so that further rendering
158 * doesn't delay the collection of our results.
161 brw_emit_query_end(brw
);
162 intel_batchbuffer_flush(intel
->batch
);
164 drm_intel_bo_unreference(brw
->query
.bo
);
165 brw
->query
.bo
= NULL
;
168 brw
->query
.obj
= NULL
;
174 static void brw_wait_query(GLcontext
*ctx
, struct gl_query_object
*q
)
176 struct brw_query_object
*query
= (struct brw_query_object
*)q
;
178 brw_queryobj_get_results(query
);
179 query
->Base
.Ready
= GL_TRUE
;
182 static void brw_check_query(GLcontext
*ctx
, struct gl_query_object
*q
)
184 struct brw_query_object
*query
= (struct brw_query_object
*)q
;
186 if (query
->bo
== NULL
|| !drm_intel_bo_busy(query
->bo
)) {
187 brw_queryobj_get_results(query
);
188 query
->Base
.Ready
= GL_TRUE
;
192 /** Called to set up the query BO and account for its aperture space */
194 brw_prepare_query_begin(struct brw_context
*brw
)
196 struct intel_context
*intel
= &brw
->intel
;
198 /* Skip if we're not doing any queries. */
202 /* Get a new query BO if we're going to need it. */
203 if (brw
->query
.bo
== NULL
||
204 brw
->query
.index
* 2 + 1 >= 4096 / sizeof(uint64_t)) {
205 drm_intel_bo_unreference(brw
->query
.bo
);
206 brw
->query
.bo
= NULL
;
208 brw
->query
.bo
= drm_intel_bo_alloc(intel
->bufmgr
, "query", 4096, 1);
209 brw
->query
.index
= 0;
212 brw_add_validated_bo(brw
, brw
->query
.bo
);
215 /** Called just before primitive drawing to get a beginning PS_DEPTH_COUNT. */
217 brw_emit_query_begin(struct brw_context
*brw
)
219 struct intel_context
*intel
= &brw
->intel
;
220 struct brw_query_object
*query
= brw
->query
.obj
;
222 /* Skip if we're not doing any queries, or we've emitted the start. */
223 if (!query
|| brw
->query
.active
)
227 OUT_BATCH(_3DSTATE_PIPE_CONTROL
|
228 PIPE_CONTROL_DEPTH_STALL
|
229 PIPE_CONTROL_WRITE_DEPTH_COUNT
);
230 /* This object could be mapped cacheable, but we don't have an exposed
231 * mechanism to support that. Since it's going uncached, tell GEM that
232 * we're writing to it. The usual clflush should be all that's required
233 * to pick up the results.
235 OUT_RELOC(brw
->query
.bo
,
236 I915_GEM_DOMAIN_INSTRUCTION
, I915_GEM_DOMAIN_INSTRUCTION
,
237 PIPE_CONTROL_GLOBAL_GTT_WRITE
|
238 ((brw
->query
.index
* 2) * sizeof(uint64_t)));
243 if (query
->bo
!= brw
->query
.bo
) {
244 if (query
->bo
!= NULL
)
245 brw_queryobj_get_results(query
);
246 drm_intel_bo_reference(brw
->query
.bo
);
247 query
->bo
= brw
->query
.bo
;
248 query
->first_index
= brw
->query
.index
;
250 query
->last_index
= brw
->query
.index
;
251 brw
->query
.active
= GL_TRUE
;
254 /** Called at batchbuffer flush to get an ending PS_DEPTH_COUNT */
256 brw_emit_query_end(struct brw_context
*brw
)
258 struct intel_context
*intel
= &brw
->intel
;
260 if (!brw
->query
.active
)
264 OUT_BATCH(_3DSTATE_PIPE_CONTROL
|
265 PIPE_CONTROL_DEPTH_STALL
|
266 PIPE_CONTROL_WRITE_DEPTH_COUNT
);
267 OUT_RELOC(brw
->query
.bo
,
268 I915_GEM_DOMAIN_INSTRUCTION
, I915_GEM_DOMAIN_INSTRUCTION
,
269 PIPE_CONTROL_GLOBAL_GTT_WRITE
|
270 ((brw
->query
.index
* 2 + 1) * sizeof(uint64_t)));
275 brw
->query
.active
= GL_FALSE
;
279 void brw_init_queryobj_functions(struct dd_function_table
*functions
)
281 functions
->NewQueryObject
= brw_new_query_object
;
282 functions
->DeleteQuery
= brw_delete_query
;
283 functions
->BeginQuery
= brw_begin_query
;
284 functions
->EndQuery
= brw_end_query
;
285 functions
->CheckQuery
= brw_check_query
;
286 functions
->WaitQuery
= brw_wait_query
;