2 * Copyright © 2014 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 * Neil Roberts <neil@linux.intel.com>
27 /** @file brw_conditional_render.c
29 * Support for conditional rendering based on query objects
30 * (GL_NV_conditional_render, GL_ARB_conditional_render_inverted) on Gen7+.
33 #include "main/imports.h"
34 #include "main/condrender.h"
36 #include "brw_context.h"
37 #include "brw_defines.h"
38 #include "intel_batchbuffer.h"
41 set_predicate_enable(struct brw_context
*brw
,
45 brw
->predicate
.state
= BRW_PREDICATE_STATE_RENDER
;
47 brw
->predicate
.state
= BRW_PREDICATE_STATE_DONT_RENDER
;
51 set_predicate_for_overflow_query(struct brw_context
*brw
,
52 struct brw_query_object
*query
,
53 int stream_start
, int count
)
55 if (!can_do_mi_math_and_lrr(brw
->screen
)) {
56 brw
->predicate
.state
= BRW_PREDICATE_STATE_STALL_FOR_QUERY
;
60 brw
->predicate
.state
= BRW_PREDICATE_STATE_USE_BIT
;
62 /* Needed to ensure the memory is coherent for the MI_LOAD_REGISTER_MEM
63 * command when loading the values into the predicate source registers for
64 * conditional rendering.
66 brw_emit_pipe_control_flush(brw
, PIPE_CONTROL_FLUSH_ENABLE
);
68 hsw_overflow_result_to_gpr0(brw
, query
, count
);
69 brw_load_register_reg64(brw
, HSW_CS_GPR(0), MI_PREDICATE_SRC0
);
70 brw_load_register_imm64(brw
, MI_PREDICATE_SRC1
, 0ull);
74 set_predicate_for_occlusion_query(struct brw_context
*brw
,
75 struct brw_query_object
*query
)
77 if (!brw
->predicate
.supported
) {
78 brw
->predicate
.state
= BRW_PREDICATE_STATE_STALL_FOR_QUERY
;
82 brw
->predicate
.state
= BRW_PREDICATE_STATE_USE_BIT
;
84 /* Needed to ensure the memory is coherent for the MI_LOAD_REGISTER_MEM
85 * command when loading the values into the predicate source registers for
86 * conditional rendering.
88 brw_emit_pipe_control_flush(brw
, PIPE_CONTROL_FLUSH_ENABLE
);
90 brw_load_register_mem64(brw
,
93 I915_GEM_DOMAIN_INSTRUCTION
,
96 brw_load_register_mem64(brw
,
99 I915_GEM_DOMAIN_INSTRUCTION
,
100 0, /* write domain */
105 set_predicate_for_result(struct brw_context
*brw
,
106 struct brw_query_object
*query
,
111 assert(query
->bo
!= NULL
);
113 switch (query
->Base
.Target
) {
114 case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB
:
115 set_predicate_for_overflow_query(brw
, query
, 0, 1);
117 case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB
:
118 set_predicate_for_overflow_query(brw
, query
, 0, MAX_VERTEX_STREAMS
);
121 set_predicate_for_occlusion_query(brw
, query
);
124 if (brw
->predicate
.state
== BRW_PREDICATE_STATE_USE_BIT
) {
126 load_op
= MI_PREDICATE_LOADOP_LOAD
;
128 load_op
= MI_PREDICATE_LOADOP_LOADINV
;
131 OUT_BATCH(GEN7_MI_PREDICATE
|
133 MI_PREDICATE_COMBINEOP_SET
|
134 MI_PREDICATE_COMPAREOP_SRCS_EQUAL
);
140 brw_begin_conditional_render(struct gl_context
*ctx
,
141 struct gl_query_object
*q
,
144 struct brw_context
*brw
= brw_context(ctx
);
145 struct brw_query_object
*query
= (struct brw_query_object
*) q
;
150 case GL_QUERY_NO_WAIT
:
151 case GL_QUERY_BY_REGION_WAIT
:
152 case GL_QUERY_BY_REGION_NO_WAIT
:
155 case GL_QUERY_WAIT_INVERTED
:
156 case GL_QUERY_NO_WAIT_INVERTED
:
157 case GL_QUERY_BY_REGION_WAIT_INVERTED
:
158 case GL_QUERY_BY_REGION_NO_WAIT_INVERTED
:
162 unreachable("Unexpected conditional render mode");
165 /* If there are already samples from a BLT operation or if the query object
166 * is ready then we can avoid looking at the values in the buffer and just
167 * decide whether to draw using the CPU without stalling.
169 if (query
->Base
.Result
|| query
->Base
.Ready
)
170 set_predicate_enable(brw
, (query
->Base
.Result
!= 0) ^ inverted
);
172 set_predicate_for_result(brw
, query
, inverted
);
176 brw_end_conditional_render(struct gl_context
*ctx
,
177 struct gl_query_object
*q
)
179 struct brw_context
*brw
= brw_context(ctx
);
181 /* When there is no longer a conditional render in progress it should
184 brw
->predicate
.state
= BRW_PREDICATE_STATE_RENDER
;
188 brw_init_conditional_render_functions(struct dd_function_table
*functions
)
190 functions
->BeginConditionalRender
= brw_begin_conditional_render
;
191 functions
->EndConditionalRender
= brw_end_conditional_render
;
195 brw_check_conditional_render(struct brw_context
*brw
)
197 if (brw
->predicate
.state
== BRW_PREDICATE_STATE_STALL_FOR_QUERY
) {
198 perf_debug("Conditional rendering is implemented in software and may "
200 return _mesa_check_conditional_render(&brw
->ctx
);
203 return brw
->predicate
.state
!= BRW_PREDICATE_STATE_DONT_RENDER
;