1 /* 2 Copyright (C) Intel Corp. 2006. All Rights Reserved. 3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to 4 develop this 3D driver. 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a copy of this software and associated documentation files (the 8 "Software"), to deal in the Software without restriction, including 9 without limitation the rights to use, copy, modify, merge, publish, 10 distribute, sublicense, and/or sell copies of the Software, and to 11 permit persons to whom the Software is furnished to do so, subject to 12 the following conditions: 13 14 The above copyright notice and this permission notice (including the 15 next paragraph) shall be included in all copies or substantial 16 portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 26 **********************************************************************/ 27 /* 28 * Authors: 29 * Keith Whitwell <keith (at) tungstengraphics.com> 30 */ 31 32 #include "main/glheader.h" 33 #include "main/macros.h" 34 #include "main/enums.h" 35 36 #include "intel_batchbuffer.h" 37 38 #include "brw_defines.h" 39 #include "brw_context.h" 40 #include "brw_eu.h" 41 #include "brw_util.h" 42 #include "brw_state.h" 43 #include "brw_gs.h" 44 45 #include "glsl/ralloc.h" 46 47 static void compile_gs_prog( struct brw_context *brw, 48 struct brw_gs_prog_key *key ) 49 { 50 struct intel_context *intel = &brw->intel; 51 struct brw_gs_compile c; 52 const GLuint *program; 53 void *mem_ctx; 54 GLuint program_size; 55 56 memset(&c, 0, sizeof(c)); 57 58 c.key = *key; 59 c.vue_map = brw->vs.prog_data->vue_map; 60 c.nr_regs = (c.vue_map.num_slots + 1)/2; 61 62 mem_ctx = ralloc_context(NULL); 63 64 /* Begin the compilation: 65 */ 66 brw_init_compile(brw, &c.func, mem_ctx); 67 68 c.func.single_program_flow = 1; 69 70 /* For some reason the thread is spawned with only 4 channels 71 * unmasked. 72 */ 73 brw_set_mask_control(&c.func, BRW_MASK_DISABLE); 74 75 if (intel->gen >= 6) { 76 unsigned num_verts; 77 bool check_edge_flag; 78 /* On Sandybridge, we use the GS for implementing transform feedback 79 * (called "Stream Out" in the PRM). 80 */ 81 switch (key->primitive) { 82 case _3DPRIM_POINTLIST: 83 num_verts = 1; 84 check_edge_flag = false; 85 break; 86 case _3DPRIM_LINELIST: 87 case _3DPRIM_LINESTRIP: 88 case _3DPRIM_LINELOOP: 89 num_verts = 2; 90 check_edge_flag = false; 91 break; 92 case _3DPRIM_TRILIST: 93 case _3DPRIM_TRIFAN: 94 case _3DPRIM_TRISTRIP: 95 case _3DPRIM_RECTLIST: 96 num_verts = 3; 97 check_edge_flag = false; 98 break; 99 case _3DPRIM_QUADLIST: 100 case _3DPRIM_QUADSTRIP: 101 case _3DPRIM_POLYGON: 102 num_verts = 3; 103 check_edge_flag = true; 104 break; 105 default: 106 assert(!"Unexpected primitive type in Gen6 SOL program."); 107 return; 108 } 109 gen6_sol_program(&c, key, num_verts, check_edge_flag); 110 } else { 111 /* On Gen4-5, we use the GS to decompose certain types of primitives. 112 * Note that primitives which don't require a GS program have already 113 * been weeded out by now. 114 */ 115 switch (key->primitive) { 116 case _3DPRIM_QUADLIST: 117 brw_gs_quads( &c, key ); 118 break; 119 case _3DPRIM_QUADSTRIP: 120 brw_gs_quad_strip( &c, key ); 121 break; 122 case _3DPRIM_LINELOOP: 123 brw_gs_lines( &c ); 124 break; 125 default: 126 ralloc_free(mem_ctx); 127 return; 128 } 129 } 130 131 /* get the program 132 */ 133 program = brw_get_program(&c.func, &program_size); 134 135 if (unlikely(INTEL_DEBUG & DEBUG_GS)) { 136 int i; 137 138 printf("gs:\n"); 139 for (i = 0; i < program_size / sizeof(struct brw_instruction); i++) 140 brw_disasm(stdout, &((struct brw_instruction *)program)[i], 141 intel->gen); 142 printf("\n"); 143 } 144 145 brw_upload_cache(&brw->cache, BRW_GS_PROG, 146 &c.key, sizeof(c.key), 147 program, program_size, 148 &c.prog_data, sizeof(c.prog_data), 149 &brw->gs.prog_offset, &brw->gs.prog_data); 150 ralloc_free(mem_ctx); 151 } 152 153 static void populate_key( struct brw_context *brw, 154 struct brw_gs_prog_key *key ) 155 { 156 static const unsigned swizzle_for_offset[4] = { 157 BRW_SWIZZLE4(0, 1, 2, 3), 158 BRW_SWIZZLE4(1, 2, 3, 3), 159 BRW_SWIZZLE4(2, 3, 3, 3), 160 BRW_SWIZZLE4(3, 3, 3, 3) 161 }; 162 163 struct gl_context *ctx = &brw->intel.ctx; 164 struct intel_context *intel = &brw->intel; 165 166 memset(key, 0, sizeof(*key)); 167 168 /* CACHE_NEW_VS_PROG (part of VUE map) */ 169 key->attrs = brw->vs.prog_data->outputs_written; 170 171 /* BRW_NEW_PRIMITIVE */ 172 key->primitive = brw->primitive; 173 174 /* _NEW_LIGHT */ 175 key->pv_first = (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION); 176 if (key->primitive == _3DPRIM_QUADLIST && ctx->Light.ShadeModel != GL_FLAT) { 177 /* Provide consistent primitive order with brw_set_prim's 178 * optimization of single quads to trifans. 179 */ 180 key->pv_first = true; 181 } 182 183 /* CACHE_NEW_VS_PROG (part of VUE map)*/ 184 key->userclip_active = brw->vs.prog_data->userclip; 185 186 if (intel->gen >= 7) { 187 /* On Gen7 and later, we don't use GS (yet). */ 188 key->need_gs_prog = false; 189 } else if (intel->gen == 6) { 190 /* On Gen6, GS is used for transform feedback. */ 191 /* _NEW_TRANSFORM_FEEDBACK */ 192 if (ctx->TransformFeedback.CurrentObject->Active && 193 !ctx->TransformFeedback.CurrentObject->Paused) { 194 const struct gl_shader_program *shaderprog = 195 ctx->Shader.CurrentVertexProgram; 196 const struct gl_transform_feedback_info *linked_xfb_info = 197 &shaderprog->LinkedTransformFeedback; 198 int i; 199 200 /* Make sure that the VUE slots won't overflow the unsigned chars in 201 * key->transform_feedback_bindings[]. 202 */ 203 STATIC_ASSERT(BRW_VERT_RESULT_MAX <= 256); 204 205 /* Make sure that we don't need more binding table entries than we've 206 * set aside for use in transform feedback. (We shouldn't, since we 207 * set aside enough binding table entries to have one per component). 208 */ 209 assert(linked_xfb_info->NumOutputs <= BRW_MAX_SOL_BINDINGS); 210 211 key->need_gs_prog = true; 212 key->num_transform_feedback_bindings = linked_xfb_info->NumOutputs; 213 for (i = 0; i < key->num_transform_feedback_bindings; ++i) { 214 key->transform_feedback_bindings[i] = 215 linked_xfb_info->Outputs[i].OutputRegister; 216 key->transform_feedback_swizzles[i] = 217 swizzle_for_offset[linked_xfb_info->Outputs[i].ComponentOffset]; 218 } 219 } 220 /* On Gen6, GS is also used for rasterizer discard. */ 221 /* _NEW_RASTERIZER_DISCARD */ 222 if (ctx->RasterDiscard) { 223 key->need_gs_prog = true; 224 key->rasterizer_discard = true; 225 } 226 } else { 227 /* Pre-gen6, GS is used to transform QUADLIST, QUADSTRIP, and LINELOOP 228 * into simpler primitives. 229 */ 230 key->need_gs_prog = (brw->primitive == _3DPRIM_QUADLIST || 231 brw->primitive == _3DPRIM_QUADSTRIP || 232 brw->primitive == _3DPRIM_LINELOOP); 233 } 234 } 235 236 /* Calculate interpolants for triangle and line rasterization. 237 */ 238 static void 239 brw_upload_gs_prog(struct brw_context *brw) 240 { 241 struct brw_gs_prog_key key; 242 /* Populate the key: 243 */ 244 populate_key(brw, &key); 245 246 if (brw->gs.prog_active != key.need_gs_prog) { 247 brw->state.dirty.cache |= CACHE_NEW_GS_PROG; 248 brw->gs.prog_active = key.need_gs_prog; 249 } 250 251 if (brw->gs.prog_active) { 252 if (!brw_search_cache(&brw->cache, BRW_GS_PROG, 253 &key, sizeof(key), 254 &brw->gs.prog_offset, &brw->gs.prog_data)) { 255 compile_gs_prog( brw, &key ); 256 } 257 } 258 } 259 260 261 const struct brw_tracked_state brw_gs_prog = { 262 .dirty = { 263 .mesa = (_NEW_LIGHT | 264 _NEW_TRANSFORM_FEEDBACK | 265 _NEW_RASTERIZER_DISCARD), 266 .brw = BRW_NEW_PRIMITIVE, 267 .cache = CACHE_NEW_VS_PROG 268 }, 269 .emit = brw_upload_gs_prog 270 }; 271
