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;
45 bool uses_clip_distance = vp->program.UsesClipDistance;
47 if (brw->vertex_program->IsNVProgram)
48 _mesa_load_tracked_matrices(ctx);
50 /* Updates the ParamaterValues[i] pointers for all parameters of the
51 * basic type of PROGRAM_STATE_VAR.
53 /* XXX: Should this happen somewhere before to get our state flag set? */
54 _mesa_load_state_parameters(ctx, vp->program.Base.Parameters);
56 /* CACHE_NEW_VS_PROG | _NEW_TRANSFORM */
57 if (brw->vs.prog_data->nr_params == 0 && !ctx->Transform.ClipPlanesEnabled) {
58 brw->vs.push_const_size = 0;
60 int params_uploaded = 0;
64 param = brw_state_batch(brw, AUB_TRACE_VS_CONSTANTS,
65 (MAX_CLIP_PLANES + nr_params) *
67 32, &brw->vs.push_const_offset);
69 if (brw->vs.prog_data->uses_new_param_layout) {
70 for (i = 0; i < brw->vs.prog_data->nr_params; i++) {
71 *param = *brw->vs.prog_data->param[i];
74 params_uploaded += brw->vs.prog_data->nr_params / 4;
76 /* This should be loaded like any other param, but it's ad-hoc
77 * until we redo the VS backend.
79 if (ctx->Transform.ClipPlanesEnabled != 0 && !uses_clip_distance) {
80 gl_clip_plane *clip_planes = brw_select_clip_planes(ctx);
81 int num_userclip_plane_consts
82 = _mesa_logbase2(ctx->Transform.ClipPlanesEnabled) + 1;
83 int num_floats = 4 * num_userclip_plane_consts;
84 memcpy(param, clip_planes, num_floats * sizeof(float));
86 params_uploaded += num_userclip_plane_consts;
89 /* Align to a reg for convenience for brw_vs_emit.c */
90 if (params_uploaded & 1) {
95 for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
96 if (brw->vs.constant_map[i] != -1) {
97 memcpy(param + brw->vs.constant_map[i] * 4,
98 vp->program.Base.Parameters->ParameterValues[i],
106 printf("VS constant buffer:\n");
107 for (i = 0; i < params_uploaded; i++) {
108 float *buf = param + i * 4;
109 printf("%d: %f %f %f %f\n",
110 i, buf[0], buf[1], buf[2], buf[3]);
114 brw->vs.push_const_size = (params_uploaded + 1) / 2;
115 /* We can only push 32 registers of constants at a time. */
116 assert(brw->vs.push_const_size <= 32);
120 const struct brw_tracked_state gen6_vs_constants = {
122 .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
123 .brw = (BRW_NEW_BATCH |
124 BRW_NEW_VERTEX_PROGRAM),
125 .cache = CACHE_NEW_VS_PROG,
127 .prepare = gen6_prepare_vs_push_constants,
131 upload_vs_state(struct brw_context *brw)
133 struct intel_context *intel = &brw->intel;
135 if (brw->vs.push_const_size == 0) {
136 /* Disable the push constant buffers. */
138 OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (5 - 2));
146 OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 |
147 GEN6_CONSTANT_BUFFER_0_ENABLE |
149 /* Pointer to the VS constant buffer. Covered by the set of
150 * state flags from gen6_prepare_wm_constants
152 OUT_BATCH(brw->vs.push_const_offset +
153 brw->vs.push_const_size - 1);
161 OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2));
162 OUT_BATCH(brw->vs.prog_offset);
163 OUT_BATCH((0 << GEN6_VS_SAMPLER_COUNT_SHIFT) |
164 GEN6_VS_FLOATING_POINT_MODE_ALT |
165 (brw->vs.nr_surfaces << GEN6_VS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
167 if (brw->vs.prog_data->total_scratch) {
168 OUT_RELOC(brw->vs.scratch_bo,
169 I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
170 ffs(brw->vs.prog_data->total_scratch) - 11);
175 OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
176 (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
177 (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
179 OUT_BATCH(((brw->vs_max_threads - 1) << GEN6_VS_MAX_THREADS_SHIFT) |
180 GEN6_VS_STATISTICS_ENABLE |
184 /* Based on my reading of the simulator, the VS constants don't get
185 * pulled into the VS FF unit until an appropriate pipeline flush
186 * happens, and instead the 3DSTATE_CONSTANT_VS packet just adds
187 * references to them into a little FIFO. The flushes are common,
188 * but don't reliably happen between this and a 3DPRIMITIVE, causing
189 * the primitive to use the wrong constants. Then the FIFO
190 * containing the constant setup gets added to again on the next
191 * constants change, and eventually when a flush does happen the
192 * unit is overwhelmed by constant changes and dies.
194 * To avoid this, send a PIPE_CONTROL down the line that will
195 * update the unit immediately loading the constants. The flush
196 * type bits here were those set by the STATE_BASE_ADDRESS whose
197 * move in a82a43e8d99e1715dd11c9c091b5ab734079b6a6 triggered the
198 * bug reports that led to this workaround, and may be more than
199 * what is strictly required to avoid the issue.
201 intel_emit_post_sync_nonzero_flush(intel);
204 OUT_BATCH(_3DSTATE_PIPE_CONTROL);
205 OUT_BATCH(PIPE_CONTROL_DEPTH_STALL |
206 PIPE_CONTROL_INSTRUCTION_FLUSH |
207 PIPE_CONTROL_STATE_CACHE_INVALIDATE);
208 OUT_BATCH(0); /* address */
209 OUT_BATCH(0); /* write data */
213 const struct brw_tracked_state gen6_vs_state = {
215 .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
216 .brw = (BRW_NEW_NR_VS_SURFACES |
219 BRW_NEW_VERTEX_PROGRAM |
221 .cache = CACHE_NEW_VS_PROG
223 .emit = upload_vs_state,