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_prepare_vs_push_constants(struct brw_context
*brw
)
39 struct intel_context
*intel
= &brw
->intel
;
40 struct gl_context
*ctx
= &intel
->ctx
;
41 /* _BRW_NEW_VERTEX_PROGRAM */
42 const struct brw_vertex_program
*vp
=
43 brw_vertex_program_const(brw
->vertex_program
);
44 unsigned int nr_params
= brw
->vs
.prog_data
->nr_params
/ 4;
46 if (brw
->vertex_program
->IsNVProgram
)
47 _mesa_load_tracked_matrices(ctx
);
49 /* Updates the ParamaterValues[i] pointers for all parameters of the
50 * basic type of PROGRAM_STATE_VAR.
52 /* XXX: Should this happen somewhere before to get our state flag set? */
53 _mesa_load_state_parameters(ctx
, vp
->program
.Base
.Parameters
);
55 /* CACHE_NEW_VS_PROG | _NEW_TRANSFORM */
56 if (brw
->vs
.prog_data
->nr_params
== 0 && !ctx
->Transform
.ClipPlanesEnabled
) {
57 brw
->vs
.push_const_size
= 0;
59 int params_uploaded
= 0;
63 param
= brw_state_batch(brw
, AUB_TRACE_VS_CONSTANTS
,
64 (MAX_CLIP_PLANES
+ nr_params
) *
66 32, &brw
->vs
.push_const_offset
);
68 /* This should be loaded like any other param, but it's ad-hoc
69 * until we redo the VS backend.
71 for (i
= 0; i
< MAX_CLIP_PLANES
; i
++) {
72 if (ctx
->Transform
.ClipPlanesEnabled
& (1 << i
)) {
73 memcpy(param
, ctx
->Transform
._ClipUserPlane
[i
], 4 * sizeof(float));
78 /* Align to a reg for convenience for brw_vs_emit.c */
79 if (params_uploaded
& 1) {
84 if (brw
->vs
.prog_data
->uses_new_param_layout
) {
85 for (i
= 0; i
< brw
->vs
.prog_data
->nr_params
; i
++) {
86 *param
= convert_param(brw
->vs
.prog_data
->param_convert
[i
],
87 brw
->vs
.prog_data
->param
[i
]);
90 params_uploaded
+= brw
->vs
.prog_data
->nr_params
/ 4;
92 for (i
= 0; i
< vp
->program
.Base
.Parameters
->NumParameters
; i
++) {
93 if (brw
->vs
.constant_map
[i
] != -1) {
94 memcpy(param
+ brw
->vs
.constant_map
[i
] * 4,
95 vp
->program
.Base
.Parameters
->ParameterValues
[i
],
103 printf("VS constant buffer:\n");
104 for (i
= 0; i
< params_uploaded
; i
++) {
105 float *buf
= param
+ i
* 4;
106 printf("%d: %f %f %f %f\n",
107 i
, buf
[0], buf
[1], buf
[2], buf
[3]);
111 brw
->vs
.push_const_size
= (params_uploaded
+ 1) / 2;
112 /* We can only push 32 registers of constants at a time. */
113 assert(brw
->vs
.push_const_size
<= 32);
117 const struct brw_tracked_state gen6_vs_constants
= {
119 .mesa
= _NEW_TRANSFORM
| _NEW_PROGRAM_CONSTANTS
,
120 .brw
= (BRW_NEW_BATCH
|
121 BRW_NEW_VERTEX_PROGRAM
),
122 .cache
= CACHE_NEW_VS_PROG
,
124 .prepare
= gen6_prepare_vs_push_constants
,
128 upload_vs_state(struct brw_context
*brw
)
130 struct intel_context
*intel
= &brw
->intel
;
132 if (brw
->vs
.push_const_size
== 0) {
133 /* Disable the push constant buffers. */
135 OUT_BATCH(_3DSTATE_CONSTANT_VS
<< 16 | (5 - 2));
143 OUT_BATCH(_3DSTATE_CONSTANT_VS
<< 16 |
144 GEN6_CONSTANT_BUFFER_0_ENABLE
|
146 /* Pointer to the VS constant buffer. Covered by the set of
147 * state flags from gen6_prepare_wm_constants
149 OUT_BATCH(brw
->vs
.push_const_offset
+
150 brw
->vs
.push_const_size
- 1);
158 OUT_BATCH(_3DSTATE_VS
<< 16 | (6 - 2));
159 OUT_BATCH(brw
->vs
.prog_offset
);
160 OUT_BATCH((0 << GEN6_VS_SAMPLER_COUNT_SHIFT
) |
161 GEN6_VS_FLOATING_POINT_MODE_ALT
|
162 (brw
->vs
.nr_surfaces
<< GEN6_VS_BINDING_TABLE_ENTRY_COUNT_SHIFT
));
163 OUT_BATCH(0); /* scratch space base offset */
164 OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT
) |
165 (brw
->vs
.prog_data
->urb_read_length
<< GEN6_VS_URB_READ_LENGTH_SHIFT
) |
166 (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT
));
168 OUT_BATCH(((brw
->vs_max_threads
- 1) << GEN6_VS_MAX_THREADS_SHIFT
) |
169 GEN6_VS_STATISTICS_ENABLE
|
173 /* Based on my reading of the simulator, the VS constants don't get
174 * pulled into the VS FF unit until an appropriate pipeline flush
175 * happens, and instead the 3DSTATE_CONSTANT_VS packet just adds
176 * references to them into a little FIFO. The flushes are common,
177 * but don't reliably happen between this and a 3DPRIMITIVE, causing
178 * the primitive to use the wrong constants. Then the FIFO
179 * containing the constant setup gets added to again on the next
180 * constants change, and eventually when a flush does happen the
181 * unit is overwhelmed by constant changes and dies.
183 * To avoid this, send a PIPE_CONTROL down the line that will
184 * update the unit immediately loading the constants. The flush
185 * type bits here were those set by the STATE_BASE_ADDRESS whose
186 * move in a82a43e8d99e1715dd11c9c091b5ab734079b6a6 triggered the
187 * bug reports that led to this workaround, and may be more than
188 * what is strictly required to avoid the issue.
191 OUT_BATCH(_3DSTATE_PIPE_CONTROL
);
192 OUT_BATCH(PIPE_CONTROL_DEPTH_STALL
|
193 PIPE_CONTROL_INSTRUCTION_FLUSH
|
194 PIPE_CONTROL_STATE_CACHE_INVALIDATE
);
195 OUT_BATCH(0); /* address */
196 OUT_BATCH(0); /* write data */
200 const struct brw_tracked_state gen6_vs_state
= {
202 .mesa
= _NEW_TRANSFORM
| _NEW_PROGRAM_CONSTANTS
,
203 .brw
= (BRW_NEW_NR_VS_SURFACES
|
206 BRW_NEW_VERTEX_PROGRAM
|
208 .cache
= CACHE_NEW_VS_PROG
210 .emit
= upload_vs_state
,