src/gallium/drivers/r300/r300_state_derived.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "draw/draw_context.h"
  24
  25 #include "util/u_math.h"
  26 #include "util/u_memory.h"
  27
  28 #include "r300_context.h"
  29 #include "r300_fs.h"
  30 #include "r300_screen.h"
  31 #include "r300_state_derived.h"
  32 #include "r300_state_inlines.h"
  33 #include "r300_vs.h"
  34
  35 /* r300_state_derived: Various bits of state which are dependent upon
  36  * currently bound CSO data. */
  37
  38 struct r300_shader_key {
  39     struct r300_vertex_shader* vs;
  40     struct r300_fragment_shader* fs;
  41 };
  42
  43 struct r300_shader_derived_value {
  44     struct r300_vertex_format* vformat;
  45     struct r300_rs_block* rs_block;
  46 };
  47
  48 unsigned r300_shader_key_hash(void* key) {
  49     struct r300_shader_key* shader_key = (struct r300_shader_key*)key;
  50     unsigned vs = (intptr_t)shader_key->vs;
  51     unsigned fs = (intptr_t)shader_key->fs;
  52
  53     return (vs << 16) | (fs & 0xffff);
  54 }
  55
  56 int r300_shader_key_compare(void* key1, void* key2) {
  57     struct r300_shader_key* shader_key1 = (struct r300_shader_key*)key1;
  58     struct r300_shader_key* shader_key2 = (struct r300_shader_key*)key2;
  59
  60     return (shader_key1->vs == shader_key2->vs) &&
  61         (shader_key1->fs == shader_key2->fs);
  62 }
  63
  64 /* Set up the vs_output_tab and routes. */
  65 static void r300_vs_output_tab_routes(struct r300_context* r300,
  66                                       int* vs_output_tab)
  67 {
  68     struct vertex_info* vinfo = &r300->vertex_info->vinfo;
  69     boolean pos = FALSE, psize = FALSE, fog = FALSE;
  70     int i, texs = 0, cols = 0;
  71     struct tgsi_shader_info* info = &r300->fs->info;
  72
  73     /* XXX One day we should figure out how to handle a different number of
  74      * VS outputs and FS inputs, as well as a different number of vertex streams
  75      * and VS inputs. It's definitely one of the sources of hardlocks. */
  76
  77     for (i = 0; i < info->num_inputs; i++) {
  78         switch (info->input_semantic_name[i]) {
  79             case TGSI_SEMANTIC_POSITION:
  80                 pos = TRUE;
  81                 vs_output_tab[i] = 0;
  82                 break;
  83             case TGSI_SEMANTIC_COLOR:
  84                 vs_output_tab[i] = 2 + cols;
  85                 cols++;
  86                 break;
  87             case TGSI_SEMANTIC_PSIZE:
  88                 assert(psize == FALSE);
  89                 psize = TRUE;
  90                 vs_output_tab[i] = 15;
  91                 break;
  92             case TGSI_SEMANTIC_FOG:
  93                 assert(fog == FALSE);
  94                 fog = TRUE;
  95                 /* Fall through */
  96             case TGSI_SEMANTIC_GENERIC:
  97                 vs_output_tab[i] = 6 + texs;
  98                 texs++;
  99                 break;
 100             default:
 101                 debug_printf("r300: Unknown vertex input %d\n",
 102                     info->input_semantic_name[i]);
 103                 break;
 104         }
 105     }
 106
 107     /* XXX magic */
 108     assert(texs <= 8);
 109
 110     /* Do the actual vertex_info setup.
 111      *
 112      * vertex_info has four uints of hardware-specific data in it.
 113      * vinfo.hwfmt[0] is R300_VAP_VTX_STATE_CNTL
 114      * vinfo.hwfmt[1] is R300_VAP_VSM_VTX_ASSM
 115      * vinfo.hwfmt[2] is R300_VAP_OUTPUT_VTX_FMT_0
 116      * vinfo.hwfmt[3] is R300_VAP_OUTPUT_VTX_FMT_1 */
 117
 118     vinfo->hwfmt[0] = 0x5555; /* XXX this is classic Mesa bonghits */
 119
 120     /* We need to add vertex position attribute only for SW TCL case,
 121      * for HW TCL case it could be generated by vertex shader */
 122     if (!pos) {
 123         /* Make room for the position attribute
 124          * at the beginning of the vs_output_tab. */
 125         for (i = 15; i > 0; i--) {
 126             vs_output_tab[i] = vs_output_tab[i-1];
 127         }
 128         vs_output_tab[0] = 0;
 129     }
 130
 131     /* Position. */
 132     if (r300->draw) {
 133         draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE,
 134             draw_find_vs_output(r300->draw, TGSI_SEMANTIC_POSITION, 0));
 135     }
 136     vinfo->hwfmt[1] |= R300_INPUT_CNTL_POS;
 137     vinfo->hwfmt[2] |= R300_VAP_OUTPUT_VTX_FMT_0__POS_PRESENT;
 138
 139     /* Point size. */
 140     if (psize) {
 141         if (r300->draw) {
 142             draw_emit_vertex_attr(vinfo, EMIT_1F_PSIZE, INTERP_POS,
 143                 draw_find_vs_output(r300->draw, TGSI_SEMANTIC_PSIZE, 0));
 144         }
 145         vinfo->hwfmt[2] |= R300_VAP_OUTPUT_VTX_FMT_0__PT_SIZE_PRESENT;
 146     }
 147
 148     /* Colors. */
 149     for (i = 0; i < cols; i++) {
 150         if (r300->draw) {
 151             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_LINEAR,
 152                 draw_find_vs_output(r300->draw, TGSI_SEMANTIC_COLOR, i));
 153         }
 154         vinfo->hwfmt[1] |= R300_INPUT_CNTL_COLOR;
 155         vinfo->hwfmt[2] |= (R300_VAP_OUTPUT_VTX_FMT_0__COLOR_0_PRESENT << i);
 156     }
 157
 158     /* Init i right here, increment it if fog is enabled.
 159      * This gets around a double-increment problem. */
 160     i = 0;
 161
 162     /* Fog. This is a special-cased texcoord. */
 163     if (fog) {
 164         i++;
 165         if (r300->draw) {
 166             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE,
 167                 draw_find_vs_output(r300->draw, TGSI_SEMANTIC_FOG, 0));
 168         }
 169         vinfo->hwfmt[1] |= (R300_INPUT_CNTL_TC0 << i);
 170         vinfo->hwfmt[3] |= (4 << (3 * i));
 171     }
 172
 173     /* Texcoords. */
 174     for (; i < texs; i++) {
 175         if (r300->draw) {
 176             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE,
 177                 draw_find_vs_output(r300->draw, TGSI_SEMANTIC_GENERIC, i));
 178         }
 179         vinfo->hwfmt[1] |= (R300_INPUT_CNTL_TC0 << i);
 180         vinfo->hwfmt[3] |= (4 << (3 * i));
 181     }
 182
 183     draw_compute_vertex_size(vinfo);
 184 }
 185
 186 /* Update the PSC tables. */
 187 static void r300_vertex_psc(struct r300_context* r300)
 188 {
 189     struct r300_vertex_info *vformat = r300->vertex_info;
 190     uint16_t type, swizzle;
 191     enum pipe_format format;
 192     unsigned i;
 193
 194     /* Vertex shaders have no semantics on their inputs,
 195      * so PSC should just route stuff based on the vertex elements,
 196      * and not on attrib information. */
 197     DBG(r300, DBG_DRAW, "r300: vs expects %d attribs, routing %d elements"
 198             " in psc\n",
 199             r300->vs->info.num_inputs,
 200             r300->vertex_element_count);
 201
 202     for (i = 0; i < r300->vertex_element_count; i++) {
 203         format = r300->vertex_element[i].src_format;
 204
 205         type = r300_translate_vertex_data_type(format) |
 206             (i << R300_DST_VEC_LOC_SHIFT);
 207         swizzle = r300_translate_vertex_data_swizzle(format);
 208
 209         if (i % 2) {
 210             vformat->vap_prog_stream_cntl[i >> 1] |= type << 16;
 211             vformat->vap_prog_stream_cntl_ext[i >> 1] |= swizzle << 16;
 212         } else {
 213             vformat->vap_prog_stream_cntl[i >> 1] |= type;
 214             vformat->vap_prog_stream_cntl_ext[i >> 1] |= swizzle;
 215         }
 216     }
 217
 218
 219     assert(i <= 15);
 220
 221     /* Set the last vector in the PSC. */
 222     if (i) {
 223         i -= 1;
 224     }
 225     vformat->vap_prog_stream_cntl[i >> 1] |=
 226         (R300_LAST_VEC << (i & 1 ? 16 : 0));
 227 }
 228
 229 /* Update the PSC tables for SW TCL, using Draw. */
 230 static void r300_swtcl_vertex_psc(struct r300_context* r300,
 231                                   int* vs_output_tab)
 232 {
 233     struct r300_vertex_info *vformat = r300->vertex_info;
 234     struct vertex_info* vinfo = &vformat->vinfo;
 235     uint16_t type, swizzle;
 236     enum pipe_format format;
 237     unsigned i, attrib_count;
 238
 239     /* For each Draw attribute, route it to the fragment shader according
 240      * to the vs_output_tab. */
 241     attrib_count = vinfo->num_attribs;
 242     DBG(r300, DBG_DRAW, "r300: attrib count: %d\n", attrib_count);
 243     for (i = 0; i < attrib_count; i++) {
 244         DBG(r300, DBG_DRAW, "r300: attrib: offset %d, interp %d, size %d,"
 245                " vs_output_tab %d\n", vinfo->attrib[i].src_index,
 246                vinfo->attrib[i].interp_mode, vinfo->attrib[i].emit,
 247                vs_output_tab[i]);
 248     }
 249
 250     for (i = 0; i < attrib_count; i++) {
 251         /* Make sure we have a proper destination for our attribute. */
 252         assert(vs_output_tab[i] != -1);
 253
 254         format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
 255
 256         /* Obtain the type of data in this attribute. */
 257         type = r300_translate_vertex_data_type(format) |
 258             vs_output_tab[i] << R300_DST_VEC_LOC_SHIFT;
 259
 260         /* Obtain the swizzle for this attribute. Note that the default
 261          * swizzle in the hardware is not XYZW! */
 262         swizzle = r300_translate_vertex_data_swizzle(format);
 263
 264         /* Add the attribute to the PSC table. */
 265         if (i & 1) {
 266             vformat->vap_prog_stream_cntl[i >> 1] |= type << 16;
 267             vformat->vap_prog_stream_cntl_ext[i >> 1] |= swizzle << 16;
 268         } else {
 269             vformat->vap_prog_stream_cntl[i >> 1] |= type;
 270             vformat->vap_prog_stream_cntl_ext[i >> 1] |= swizzle;
 271         }
 272     }
 273
 274     /* Set the last vector in the PSC. */
 275     if (i) {
 276         i -= 1;
 277     }
 278     vformat->vap_prog_stream_cntl[i >> 1] |=
 279         (R300_LAST_VEC << (i & 1 ? 16 : 0));
 280 }
 281
 282 /* Set up the RS block. This is the part of the chipset that actually does
 283  * the rasterization of vertices into fragments. This is also the part of the
 284  * chipset that locks up if any part of it is even slightly wrong. */
 285 static void r300_update_rs_block(struct r300_context* r300)
 286 {
 287     struct r300_rs_block* rs = r300->rs_block;
 288     struct tgsi_shader_info* info = &r300->fs->info;
 289     int col_count = 0, fp_offset = 0, i, tex_count = 0;
 290     int rs_tex_comp = 0;
 291
 292     if (r300_screen(r300->context.screen)->caps->is_r500) {
 293         for (i = 0; i < info->num_inputs; i++) {
 294             switch (info->input_semantic_name[i]) {
 295                 case TGSI_SEMANTIC_COLOR:
 296                     rs->ip[col_count] |=
 297                         R500_RS_COL_PTR(col_count) |
 298                         R500_RS_COL_FMT(R300_RS_COL_FMT_RGBA);
 299                     col_count++;
 300                     break;
 301                 case TGSI_SEMANTIC_GENERIC:
 302                     rs->ip[tex_count] |=
 303                         R500_RS_SEL_S(rs_tex_comp) |
 304                         R500_RS_SEL_T(rs_tex_comp + 1) |
 305                         R500_RS_SEL_R(rs_tex_comp + 2) |
 306                         R500_RS_SEL_Q(rs_tex_comp + 3);
 307                     tex_count++;
 308                     rs_tex_comp += 4;
 309                     break;
 310                 default:
 311                     break;
 312             }
 313         }
 314
 315         /* Rasterize at least one color, or bad things happen. */
 316         if ((col_count == 0) && (tex_count == 0)) {
 317             rs->ip[0] |= R500_RS_COL_FMT(R300_RS_COL_FMT_0001);
 318             col_count++;
 319         }
 320
 321         for (i = 0; i < col_count; i++) {
 322             rs->inst[i] |= R500_RS_INST_COL_ID(i) |
 323                 R500_RS_INST_COL_CN_WRITE | R500_RS_INST_COL_ADDR(fp_offset);
 324             fp_offset++;
 325         }
 326
 327         for (i = 0; i < tex_count; i++) {
 328             rs->inst[i] |= R500_RS_INST_TEX_ID(i) |
 329                 R500_RS_INST_TEX_CN_WRITE | R500_RS_INST_TEX_ADDR(fp_offset);
 330             fp_offset++;
 331         }
 332
 333     } else {
 334         for (i = 0; i < info->num_inputs; i++) {
 335             switch (info->input_semantic_name[i]) {
 336                 case TGSI_SEMANTIC_COLOR:
 337                     rs->ip[col_count] |=
 338                         R300_RS_COL_PTR(col_count) |
 339                         R300_RS_COL_FMT(R300_RS_COL_FMT_RGBA);
 340                     col_count++;
 341                     break;
 342                 case TGSI_SEMANTIC_GENERIC:
 343                     rs->ip[tex_count] |=
 344                         R300_RS_TEX_PTR(rs_tex_comp) |
 345                         R300_RS_SEL_S(R300_RS_SEL_C0) |
 346                         R300_RS_SEL_T(R300_RS_SEL_C1) |
 347                         R300_RS_SEL_R(R300_RS_SEL_C2) |
 348                         R300_RS_SEL_Q(R300_RS_SEL_C3);
 349                     tex_count++;
 350                     rs_tex_comp+=4;
 351                     break;
 352                 default:
 353                     break;
 354             }
 355         }
 356
 357         /* Rasterize at least one color, or bad things happen. */
 358         if (col_count == 0) {
 359             rs->ip[0] |= R300_RS_COL_FMT(R300_RS_COL_FMT_0001);
 360             col_count++;
 361         }
 362
 363         if (tex_count == 0) {
 364             rs->ip[0] |=
 365                 R300_RS_SEL_S(R300_RS_SEL_K0) |
 366                 R300_RS_SEL_T(R300_RS_SEL_K0) |
 367                 R300_RS_SEL_R(R300_RS_SEL_K0) |
 368                 R300_RS_SEL_Q(R300_RS_SEL_K1);
 369         }
 370
 371         for (i = 0; i < col_count; i++) {
 372             rs->inst[i] |= R300_RS_INST_COL_ID(i) |
 373                 R300_RS_INST_COL_CN_WRITE | R300_RS_INST_COL_ADDR(fp_offset);
 374             fp_offset++;
 375         }
 376
 377         for (i = 0; i < tex_count; i++) {
 378             rs->inst[i] |= R300_RS_INST_TEX_ID(i) |
 379                 R300_RS_INST_TEX_CN_WRITE | R300_RS_INST_TEX_ADDR(fp_offset);
 380             fp_offset++;
 381         }
 382     }
 383
 384     rs->count = (rs_tex_comp) | (col_count << R300_IC_COUNT_SHIFT) |
 385         R300_HIRES_EN;
 386
 387     rs->inst_count = MAX3(col_count - 1, tex_count - 1, 0);
 388 }
 389
 390 /* Update the vertex format. */
 391 static void r300_update_derived_shader_state(struct r300_context* r300)
 392 {
 393     struct r300_screen* r300screen = r300_screen(r300->context.screen);
 394     int vs_output_tab[16];
 395     int i;
 396
 397
 398     /*
 399     struct r300_shader_key* key;
 400     struct r300_shader_derived_value* value;
 401     key = CALLOC_STRUCT(r300_shader_key);
 402     key->vs = r300->vs;
 403     key->fs = r300->fs;
 404
 405     value = (struct r300_shader_derived_value*)
 406         util_hash_table_get(r300->shader_hash_table, (void*)key);
 407     if (value) {
 408         //vformat = value->vformat;
 409         rs_block = value->rs_block;
 410
 411         FREE(key);
 412     } else {
 413         rs_block = CALLOC_STRUCT(r300_rs_block);
 414         value = CALLOC_STRUCT(r300_shader_derived_value);
 415
 416         r300_update_rs_block(r300, rs_block);
 417
 418         //value->vformat = vformat;
 419         value->rs_block = rs_block;
 420         util_hash_table_set(r300->shader_hash_table,
 421             (void*)key, (void*)value);
 422     } */
 423
 424     /* Reset structures */
 425     memset(r300->rs_block, 0, sizeof(struct r300_rs_block));
 426     memset(r300->vertex_info, 0, sizeof(struct r300_vertex_info));
 427
 428     for (i = 0; i < 16; i++) {
 429         vs_output_tab[i] = -1;
 430     }
 431
 432     /* Update states */
 433     r300_vs_output_tab_routes(r300, vs_output_tab);
 434
 435     if (r300screen->caps->has_tcl) {
 436         r300_vertex_psc(r300);
 437     } else {
 438         r300_swtcl_vertex_psc(r300, vs_output_tab);
 439     }
 440
 441     r300_update_rs_block(r300);
 442
 443     r300->dirty_state |= R300_NEW_RS_BLOCK;
 444 }
 445
 446 static void r300_update_ztop(struct r300_context* r300)
 447 {
 448     r300->ztop_state.z_buffer_top = R300_ZTOP_ENABLE;
 449
 450     /* This is important enough that I felt it warranted a comment.
 451      *
 452      * According to the docs, these are the conditions where ZTOP must be
 453      * disabled:
 454      * 1) Alpha testing enabled
 455      * 2) Texture kill instructions in fragment shader
 456      * 3) Chroma key culling enabled
 457      * 4) W-buffering enabled
 458      *
 459      * The docs claim that for the first three cases, if no ZS writes happen,
 460      * then ZTOP can be used.
 461      *
 462      * Additionally, the following conditions require disabled ZTOP:
 463      * ~) Depth writes in fragment shader
 464      * ~) Outstanding occlusion queries
 465      *
 466      * ~C.
 467      */
 468     if (r300->dsa_state->alpha_function) {
 469         r300->ztop_state.z_buffer_top = R300_ZTOP_DISABLE;
 470     } else if (r300->fs->info.uses_kill) {
 471         r300->ztop_state.z_buffer_top = R300_ZTOP_DISABLE;
 472     } else if (r300_fragment_shader_writes_depth(r300->fs)) {
 473         r300->ztop_state.z_buffer_top = R300_ZTOP_DISABLE;
 474     } else if (r300->query_current) {
 475         r300->ztop_state.z_buffer_top = R300_ZTOP_DISABLE;
 476     }
 477 }
 478
 479 void r300_update_derived_state(struct r300_context* r300)
 480 {
 481     if (r300->dirty_state &
 482         (R300_NEW_FRAGMENT_SHADER | R300_NEW_VERTEX_SHADER |
 483          R300_NEW_VERTEX_FORMAT)) {
 484         r300_update_derived_shader_state(r300);
 485     }
 486
 487     if (r300->dirty_state &
 488             (R300_NEW_DSA | R300_NEW_FRAGMENT_SHADER | R300_NEW_QUERY)) {
 489         r300_update_ztop(r300);
 490     }
 491 }