2 * Copyright © 2009 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 #include "brw_context.h"
29 #include "brw_state.h"
30 #include "brw_defines.h"
32 #include "program/prog_parameter.h"
33 #include "program/prog_statevars.h"
34 #include "intel_batchbuffer.h"
37 gen6_upload_vec4_push_constants(struct brw_context
*brw
,
38 const struct gl_program
*prog
,
39 const struct brw_vec4_prog_data
*prog_data
,
40 struct brw_stage_state
*stage_state
,
41 enum state_struct_type type
)
43 struct gl_context
*ctx
= &brw
->ctx
;
45 /* Updates the ParamaterValues[i] pointers for all parameters of the
46 * basic type of PROGRAM_STATE_VAR.
48 /* XXX: Should this happen somewhere before to get our state flag set? */
49 _mesa_load_state_parameters(ctx
, prog
->Parameters
);
51 if (prog_data
->base
.nr_params
== 0) {
52 stage_state
->push_const_size
= 0;
58 param
= brw_state_batch(brw
, type
,
59 prog_data
->base
.nr_params
* sizeof(float),
60 32, &stage_state
->push_const_offset
);
62 /* _NEW_PROGRAM_CONSTANTS
64 * Also _NEW_TRANSFORM -- we may reference clip planes other than as a
65 * side effect of dereferencing uniforms, so _NEW_PROGRAM_CONSTANTS
66 * wouldn't be set for them.
68 for (i
= 0; i
< prog_data
->base
.nr_params
; i
++) {
69 param
[i
] = *prog_data
->base
.param
[i
];
71 params_uploaded
= prog_data
->base
.nr_params
/ 4;
74 fprintf(stderr
, "Constant buffer:\n");
75 for (i
= 0; i
< params_uploaded
; i
++) {
76 float *buf
= param
+ i
* 4;
77 fprintf(stderr
, "%d: %f %f %f %f\n",
78 i
, buf
[0], buf
[1], buf
[2], buf
[3]);
82 stage_state
->push_const_size
= (params_uploaded
+ 1) / 2;
83 /* We can only push 32 registers of constants at a time. */
84 assert(stage_state
->push_const_size
<= 32);
89 gen6_upload_vs_push_constants(struct brw_context
*brw
)
91 struct brw_stage_state
*stage_state
= &brw
->vs
.base
;
93 /* _BRW_NEW_VERTEX_PROGRAM */
94 const struct brw_vertex_program
*vp
=
95 brw_vertex_program_const(brw
->vertex_program
);
96 /* CACHE_NEW_VS_PROG */
97 const struct brw_vec4_prog_data
*prog_data
= &brw
->vs
.prog_data
->base
;
99 gen6_upload_vec4_push_constants(brw
, &vp
->program
.Base
, prog_data
,
100 stage_state
, AUB_TRACE_VS_CONSTANTS
);
103 if (brw
->gen
== 7 && !brw
->is_haswell
)
104 gen7_emit_vs_workaround_flush(brw
);
106 gen7_upload_constant_state(brw
, stage_state
, true /* active */,
107 _3DSTATE_CONSTANT_VS
);
111 const struct brw_tracked_state gen6_vs_push_constants
= {
113 .mesa
= _NEW_TRANSFORM
| _NEW_PROGRAM_CONSTANTS
,
114 .brw
= (BRW_NEW_BATCH
|
115 BRW_NEW_VERTEX_PROGRAM
|
116 BRW_NEW_PUSH_CONSTANT_ALLOCATION
),
117 .cache
= CACHE_NEW_VS_PROG
,
119 .emit
= gen6_upload_vs_push_constants
,
123 upload_vs_state(struct brw_context
*brw
)
125 struct gl_context
*ctx
= &brw
->ctx
;
126 const struct brw_stage_state
*stage_state
= &brw
->vs
.base
;
127 uint32_t floating_point_mode
= 0;
129 /* From the BSpec, 3D Pipeline > Geometry > Vertex Shader > State,
130 * 3DSTATE_VS, Dword 5.0 "VS Function Enable":
132 * [DevSNB] A pipeline flush must be programmed prior to a 3DSTATE_VS
133 * command that causes the VS Function Enable to toggle. Pipeline
134 * flush can be executed by sending a PIPE_CONTROL command with CS
135 * stall bit set and a post sync operation.
137 * Although we don't disable the VS during normal drawing, BLORP sometimes
138 * disables it. To be safe, do the flush here just in case.
140 intel_emit_post_sync_nonzero_flush(brw
);
142 if (stage_state
->push_const_size
== 0) {
143 /* Disable the push constant buffers. */
145 OUT_BATCH(_3DSTATE_CONSTANT_VS
<< 16 | (5 - 2));
153 OUT_BATCH(_3DSTATE_CONSTANT_VS
<< 16 |
154 GEN6_CONSTANT_BUFFER_0_ENABLE
|
156 /* Pointer to the VS constant buffer. Covered by the set of
157 * state flags from gen6_upload_vs_constants
159 OUT_BATCH(stage_state
->push_const_offset
+
160 stage_state
->push_const_size
- 1);
167 /* Use ALT floating point mode for ARB vertex programs, because they
170 if (ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
] == NULL
)
171 floating_point_mode
= GEN6_VS_FLOATING_POINT_MODE_ALT
;
174 OUT_BATCH(_3DSTATE_VS
<< 16 | (6 - 2));
175 OUT_BATCH(stage_state
->prog_offset
);
176 OUT_BATCH(floating_point_mode
|
177 ((ALIGN(stage_state
->sampler_count
, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT
) |
178 ((brw
->vs
.prog_data
->base
.base
.binding_table
.size_bytes
/ 4) <<
179 GEN6_VS_BINDING_TABLE_ENTRY_COUNT_SHIFT
));
181 if (brw
->vs
.prog_data
->base
.total_scratch
) {
182 OUT_RELOC(stage_state
->scratch_bo
,
183 I915_GEM_DOMAIN_RENDER
, I915_GEM_DOMAIN_RENDER
,
184 ffs(brw
->vs
.prog_data
->base
.total_scratch
) - 11);
189 OUT_BATCH((brw
->vs
.prog_data
->base
.dispatch_grf_start_reg
<<
190 GEN6_VS_DISPATCH_START_GRF_SHIFT
) |
191 (brw
->vs
.prog_data
->base
.urb_read_length
<< GEN6_VS_URB_READ_LENGTH_SHIFT
) |
192 (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT
));
194 OUT_BATCH(((brw
->max_vs_threads
- 1) << GEN6_VS_MAX_THREADS_SHIFT
) |
195 GEN6_VS_STATISTICS_ENABLE
|
199 /* Based on my reading of the simulator, the VS constants don't get
200 * pulled into the VS FF unit until an appropriate pipeline flush
201 * happens, and instead the 3DSTATE_CONSTANT_VS packet just adds
202 * references to them into a little FIFO. The flushes are common,
203 * but don't reliably happen between this and a 3DPRIMITIVE, causing
204 * the primitive to use the wrong constants. Then the FIFO
205 * containing the constant setup gets added to again on the next
206 * constants change, and eventually when a flush does happen the
207 * unit is overwhelmed by constant changes and dies.
209 * To avoid this, send a PIPE_CONTROL down the line that will
210 * update the unit immediately loading the constants. The flush
211 * type bits here were those set by the STATE_BASE_ADDRESS whose
212 * move in a82a43e8d99e1715dd11c9c091b5ab734079b6a6 triggered the
213 * bug reports that led to this workaround, and may be more than
214 * what is strictly required to avoid the issue.
216 intel_emit_post_sync_nonzero_flush(brw
);
217 brw_emit_pipe_control_flush(brw
,
218 PIPE_CONTROL_DEPTH_STALL
|
219 PIPE_CONTROL_INSTRUCTION_FLUSH
|
220 PIPE_CONTROL_STATE_CACHE_INVALIDATE
);
223 const struct brw_tracked_state gen6_vs_state
= {
225 .mesa
= _NEW_TRANSFORM
| _NEW_PROGRAM_CONSTANTS
,
226 .brw
= (BRW_NEW_CONTEXT
|
227 BRW_NEW_VERTEX_PROGRAM
|
229 BRW_NEW_PUSH_CONSTANT_ALLOCATION
),
230 .cache
= CACHE_NEW_VS_PROG
232 .emit
= upload_vs_state
,