1 /* 2 * Copyright 2009 Intel Corporation 3 * 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: 10 * 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 13 * Software. 14 * 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 21 * IN THE SOFTWARE. 22 * 23 * Authors: 24 * Eric Anholt <eric (at) anholt.net> 25 * 26 */ 27 28 #include "brw_context.h" 29 #include "brw_state.h" 30 #include "brw_defines.h" 31 #include "brw_util.h" 32 #include "program/prog_parameter.h" 33 #include "program/prog_statevars.h" 34 #include "intel_batchbuffer.h" 35 36 static void 37 gen6_upload_vs_push_constants(struct brw_context *brw) 38 { 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; 46 47 if (brw->vertex_program->IsNVProgram) 48 _mesa_load_tracked_matrices(ctx); 49 50 /* Updates the ParamaterValues[i] pointers for all parameters of the 51 * basic type of PROGRAM_STATE_VAR. 52 */ 53 /* XXX: Should this happen somewhere before to get our state flag set? */ 54 _mesa_load_state_parameters(ctx, vp->program.Base.Parameters); 55 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; 59 } else { 60 int params_uploaded = 0; 61 float *param; 62 int i; 63 64 param = brw_state_batch(brw, AUB_TRACE_VS_CONSTANTS, 65 (MAX_CLIP_PLANES + nr_params) * 66 4 * sizeof(float), 67 32, &brw->vs.push_const_offset); 68 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]; 72 param++; 73 } 74 params_uploaded += brw->vs.prog_data->nr_params / 4; 75 } else { 76 /* This should be loaded like any other param, but it's ad-hoc 77 * until we redo the VS backend. 78 */ 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)); 85 param += num_floats; 86 params_uploaded += num_userclip_plane_consts; 87 } 88 89 /* Align to a reg for convenience for brw_vs_emit.c */ 90 if (params_uploaded & 1) { 91 param += 4; 92 params_uploaded++; 93 } 94 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], 99 4 * sizeof(float)); 100 params_uploaded++; 101 } 102 } 103 } 104 105 if (0) { 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]); 111 } 112 } 113 114 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); 117 } 118 } 119 120 const struct brw_tracked_state gen6_vs_push_constants = { 121 .dirty = { 122 .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS, 123 .brw = (BRW_NEW_BATCH | 124 BRW_NEW_VERTEX_PROGRAM), 125 .cache = CACHE_NEW_VS_PROG, 126 }, 127 .emit = gen6_upload_vs_push_constants, 128 }; 129 130 static void 131 upload_vs_state(struct brw_context *brw) 132 { 133 struct intel_context *intel = &brw->intel; 134 uint32_t floating_point_mode = 0; 135 136 /* From the BSpec, Volume 2a, Part 3 "Vertex Shader", Section 137 * 3DSTATE_VS, Dword 5.0 "VS Function Enable": 138 * [DevSNB] A pipeline flush must be programmed prior to a 3DSTATE_VS 139 * command that causes the VS Function Enable to toggle. Pipeline 140 * flush can be executed by sending a PIPE_CONTROL command with CS 141 * stall bit set and a post sync operation. 142 */ 143 intel_emit_post_sync_nonzero_flush(intel); 144 145 if (brw->vs.push_const_size == 0) { 146 /* Disable the push constant buffers. */ 147 BEGIN_BATCH(5); 148 OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (5 - 2)); 149 OUT_BATCH(0); 150 OUT_BATCH(0); 151 OUT_BATCH(0); 152 OUT_BATCH(0); 153 ADVANCE_BATCH(); 154 } else { 155 BEGIN_BATCH(5); 156 OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | 157 GEN6_CONSTANT_BUFFER_0_ENABLE | 158 (5 - 2)); 159 /* Pointer to the VS constant buffer. Covered by the set of 160 * state flags from gen6_upload_vs_constants 161 */ 162 OUT_BATCH(brw->vs.push_const_offset + 163 brw->vs.push_const_size - 1); 164 OUT_BATCH(0); 165 OUT_BATCH(0); 166 OUT_BATCH(0); 167 ADVANCE_BATCH(); 168 } 169 170 /* Use ALT floating point mode for ARB vertex programs, because they 171 * require 0^0 == 1. 172 */ 173 if (intel->ctx.Shader.CurrentVertexProgram == NULL) 174 floating_point_mode = GEN6_VS_FLOATING_POINT_MODE_ALT; 175 176 BEGIN_BATCH(6); 177 OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2)); 178 OUT_BATCH(brw->vs.prog_offset); 179 OUT_BATCH(floating_point_mode | 180 ((ALIGN(brw->sampler.count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT)); 181 182 if (brw->vs.prog_data->total_scratch) { 183 OUT_RELOC(brw->vs.scratch_bo, 184 I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 185 ffs(brw->vs.prog_data->total_scratch) - 11); 186 } else { 187 OUT_BATCH(0); 188 } 189 190 OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) | 191 (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) | 192 (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT)); 193 194 OUT_BATCH(((brw->max_vs_threads - 1) << GEN6_VS_MAX_THREADS_SHIFT) | 195 GEN6_VS_STATISTICS_ENABLE | 196 GEN6_VS_ENABLE); 197 ADVANCE_BATCH(); 198 199 /* 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. 208 * 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. 215 */ 216 intel_emit_post_sync_nonzero_flush(intel); 217 218 BEGIN_BATCH(4); 219 OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); 220 OUT_BATCH(PIPE_CONTROL_DEPTH_STALL | 221 PIPE_CONTROL_INSTRUCTION_FLUSH | 222 PIPE_CONTROL_STATE_CACHE_INVALIDATE); 223 OUT_BATCH(0); /* address */ 224 OUT_BATCH(0); /* write data */ 225 ADVANCE_BATCH(); 226 } 227 228 const struct brw_tracked_state gen6_vs_state = { 229 .dirty = { 230 .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS, 231 .brw = (BRW_NEW_CONTEXT | 232 BRW_NEW_VERTEX_PROGRAM | 233 BRW_NEW_BATCH), 234 .cache = CACHE_NEW_VS_PROG | CACHE_NEW_SAMPLER 235 }, 236 .emit = upload_vs_state, 237 }; 238
