src/mesa/drivers/dri/i965/brw_vs.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics 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 <keithw@vmware.com>
  30   */
  31
  32
  33 #include "main/compiler.h"
  34 #include "main/context.h"
  35 #include "brw_context.h"
  36 #include "brw_vs.h"
  37 #include "brw_util.h"
  38 #include "brw_state.h"
  39 #include "program/prog_print.h"
  40 #include "program/prog_parameter.h"
  41 #include "brw_nir.h"
  42 #include "brw_program.h"
  43
  44 #include "util/ralloc.h"
  45
  46 bool
  47 brw_codegen_vs_prog(struct brw_context *brw,
  48                     struct gl_shader_program *prog,
  49                     struct brw_vertex_program *vp,
  50                     struct brw_vs_prog_key *key)
  51 {
  52    const struct brw_compiler *compiler = brw->intelScreen->compiler;
  53    GLuint program_size;
  54    const GLuint *program;
  55    struct brw_vs_prog_data prog_data;
  56    struct brw_stage_prog_data *stage_prog_data = &prog_data.base.base;
  57    void *mem_ctx;
  58    int i;
  59    struct brw_shader *vs = NULL;
  60    bool start_busy = false;
  61    double start_time = 0;
  62
  63    if (prog)
  64       vs = (struct brw_shader *) prog->_LinkedShaders[MESA_SHADER_VERTEX];
  65
  66    memset(&prog_data, 0, sizeof(prog_data));
  67
  68    /* Use ALT floating point mode for ARB programs so that 0^0 == 1. */
  69    if (!prog)
  70       stage_prog_data->use_alt_mode = true;
  71
  72    mem_ctx = ralloc_context(NULL);
  73
  74    brw_assign_common_binding_table_offsets(MESA_SHADER_VERTEX,
  75                                            brw->intelScreen->devinfo,
  76                                            prog, &vp->program.Base,
  77                                            &prog_data.base.base, 0);
  78
  79    /* Allocate the references to the uniforms that will end up in the
  80     * prog_data associated with the compiled program, and which will be freed
  81     * by the state cache.
  82     */
  83    int param_count = vp->program.Base.nir->num_uniforms;
  84    if (!compiler->scalar_stage[MESA_SHADER_VERTEX])
  85       param_count *= 4;
  86
  87    if (vs)
  88       prog_data.base.base.nr_image_params = vs->base.NumImages;
  89
  90    /* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
  91     * planes as uniforms.
  92     */
  93    param_count += key->nr_userclip_plane_consts * 4;
  94
  95    stage_prog_data->param =
  96       rzalloc_array(NULL, const gl_constant_value *, param_count);
  97    stage_prog_data->pull_param =
  98       rzalloc_array(NULL, const gl_constant_value *, param_count);
  99    stage_prog_data->image_param =
 100       rzalloc_array(NULL, struct brw_image_param,
 101                     stage_prog_data->nr_image_params);
 102    stage_prog_data->nr_params = param_count;
 103
 104    if (prog) {
 105       brw_nir_setup_glsl_uniforms(vp->program.Base.nir, prog, &vp->program.Base,
 106                                   &prog_data.base.base,
 107                                   compiler->scalar_stage[MESA_SHADER_VERTEX]);
 108    } else {
 109       brw_nir_setup_arb_uniforms(vp->program.Base.nir, &vp->program.Base,
 110                                  &prog_data.base.base);
 111    }
 112
 113    GLbitfield64 outputs_written = vp->program.Base.OutputsWritten;
 114    prog_data.inputs_read = vp->program.Base.InputsRead;
 115
 116    if (key->copy_edgeflag) {
 117       outputs_written |= BITFIELD64_BIT(VARYING_SLOT_EDGE);
 118       prog_data.inputs_read |= VERT_BIT_EDGEFLAG;
 119    }
 120
 121    if (brw->gen < 6) {
 122       /* Put dummy slots into the VUE for the SF to put the replaced
 123        * point sprite coords in.  We shouldn't need these dummy slots,
 124        * which take up precious URB space, but it would mean that the SF
 125        * doesn't get nice aligned pairs of input coords into output
 126        * coords, which would be a pain to handle.
 127        */
 128       for (i = 0; i < 8; i++) {
 129          if (key->point_coord_replace & (1 << i))
 130             outputs_written |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + i);
 131       }
 132
 133       /* if back colors are written, allocate slots for front colors too */
 134       if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC0))
 135          outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL0);
 136       if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC1))
 137          outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL1);
 138    }
 139
 140    /* In order for legacy clipping to work, we need to populate the clip
 141     * distance varying slots whenever clipping is enabled, even if the vertex
 142     * shader doesn't write to gl_ClipDistance.
 143     */
 144    if (key->nr_userclip_plane_consts > 0) {
 145       outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0);
 146       outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1);
 147    }
 148
 149    brw_compute_vue_map(brw->intelScreen->devinfo,
 150                        &prog_data.base.vue_map, outputs_written,
 151                        prog ? prog->SeparateShader ||
 152                               prog->_LinkedShaders[MESA_SHADER_TESS_EVAL]
 153                             : false);
 154
 155    if (0) {
 156       _mesa_fprint_program_opt(stderr, &vp->program.Base, PROG_PRINT_DEBUG,
 157                                true);
 158    }
 159
 160    if (unlikely(brw->perf_debug)) {
 161       start_busy = (brw->batch.last_bo &&
 162                     drm_intel_bo_busy(brw->batch.last_bo));
 163       start_time = get_time();
 164    }
 165
 166    if (unlikely(INTEL_DEBUG & DEBUG_VS)) {
 167       brw_dump_ir("vertex", prog, vs ? &vs->base : NULL, &vp->program.Base);
 168
 169       fprintf(stderr, "VS Output ");
 170       brw_print_vue_map(stderr, &prog_data.base.vue_map);
 171    }
 172
 173    int st_index = -1;
 174    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 175       st_index = brw_get_shader_time_index(brw, prog, &vp->program.Base, ST_VS);
 176
 177    /* Emit GEN4 code.
 178     */
 179    char *error_str;
 180    program = brw_compile_vs(compiler, brw, mem_ctx, key,
 181                             &prog_data, vp->program.Base.nir,
 182                             brw_select_clip_planes(&brw->ctx),
 183                             !_mesa_is_gles3(&brw->ctx),
 184                             st_index, &program_size, &error_str);
 185    if (program == NULL) {
 186       if (prog) {
 187          prog->LinkStatus = false;
 188          ralloc_strcat(&prog->InfoLog, error_str);
 189       }
 190
 191       _mesa_problem(NULL, "Failed to compile vertex shader: %s\n", error_str);
 192
 193       ralloc_free(mem_ctx);
 194       return false;
 195    }
 196
 197    if (unlikely(brw->perf_debug) && vs) {
 198       if (vs->compiled_once) {
 199          brw_vs_debug_recompile(brw, prog, key);
 200       }
 201       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 202          perf_debug("VS compile took %.03f ms and stalled the GPU\n",
 203                     (get_time() - start_time) * 1000);
 204       }
 205       vs->compiled_once = true;
 206    }
 207
 208    /* Scratch space is used for register spilling */
 209    if (prog_data.base.base.total_scratch) {
 210       brw_get_scratch_bo(brw, &brw->vs.base.scratch_bo,
 211                          prog_data.base.base.total_scratch *
 212                          brw->max_vs_threads);
 213    }
 214
 215    brw_upload_cache(&brw->cache, BRW_CACHE_VS_PROG,
 216                     key, sizeof(struct brw_vs_prog_key),
 217                     program, program_size,
 218                     &prog_data, sizeof(prog_data),
 219                     &brw->vs.base.prog_offset, &brw->vs.prog_data);
 220    ralloc_free(mem_ctx);
 221
 222    return true;
 223 }
 224
 225 void
 226 brw_vs_debug_recompile(struct brw_context *brw,
 227                        struct gl_shader_program *prog,
 228                        const struct brw_vs_prog_key *key)
 229 {
 230    struct brw_cache_item *c = NULL;
 231    const struct brw_vs_prog_key *old_key = NULL;
 232    bool found = false;
 233
 234    perf_debug("Recompiling vertex shader for program %d\n", prog->Name);
 235
 236    for (unsigned int i = 0; i < brw->cache.size; i++) {
 237       for (c = brw->cache.items[i]; c; c = c->next) {
 238          if (c->cache_id == BRW_CACHE_VS_PROG) {
 239             old_key = c->key;
 240
 241             if (old_key->program_string_id == key->program_string_id)
 242                break;
 243          }
 244       }
 245       if (c)
 246          break;
 247    }
 248
 249    if (!c) {
 250       perf_debug("  Didn't find previous compile in the shader cache for "
 251                  "debug\n");
 252       return;
 253    }
 254
 255    for (unsigned int i = 0; i < VERT_ATTRIB_MAX; i++) {
 256       found |= key_debug(brw, "Vertex attrib w/a flags",
 257                          old_key->gl_attrib_wa_flags[i],
 258                          key->gl_attrib_wa_flags[i]);
 259    }
 260
 261    found |= key_debug(brw, "legacy user clipping",
 262                       old_key->nr_userclip_plane_consts,
 263                       key->nr_userclip_plane_consts);
 264
 265    found |= key_debug(brw, "copy edgeflag",
 266                       old_key->copy_edgeflag, key->copy_edgeflag);
 267    found |= key_debug(brw, "PointCoord replace",
 268                       old_key->point_coord_replace, key->point_coord_replace);
 269    found |= key_debug(brw, "vertex color clamping",
 270                       old_key->clamp_vertex_color, key->clamp_vertex_color);
 271
 272    found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
 273
 274    if (!found) {
 275       perf_debug("  Something else\n");
 276    }
 277 }
 278
 279 static bool
 280 brw_vs_state_dirty(struct brw_context *brw)
 281 {
 282    return brw_state_dirty(brw,
 283                           _NEW_BUFFERS |
 284                           _NEW_LIGHT |
 285                           _NEW_POINT |
 286                           _NEW_POLYGON |
 287                           _NEW_TEXTURE |
 288                           _NEW_TRANSFORM,
 289                           BRW_NEW_VERTEX_PROGRAM |
 290                           BRW_NEW_VS_ATTRIB_WORKAROUNDS);
 291 }
 292
 293 static void
 294 brw_vs_populate_key(struct brw_context *brw,
 295                     struct brw_vs_prog_key *key)
 296 {
 297    struct gl_context *ctx = &brw->ctx;
 298    /* BRW_NEW_VERTEX_PROGRAM */
 299    struct brw_vertex_program *vp =
 300       (struct brw_vertex_program *)brw->vertex_program;
 301    struct gl_program *prog = (struct gl_program *) brw->vertex_program;
 302    int i;
 303
 304    memset(key, 0, sizeof(*key));
 305
 306    /* Just upload the program verbatim for now.  Always send it all
 307     * the inputs it asks for, whether they are varying or not.
 308     */
 309    key->program_string_id = vp->id;
 310
 311    if (ctx->Transform.ClipPlanesEnabled != 0 &&
 312        (ctx->API == API_OPENGL_COMPAT ||
 313         ctx->API == API_OPENGLES) &&
 314        vp->program.Base.ClipDistanceArraySize == 0) {
 315       key->nr_userclip_plane_consts =
 316          _mesa_logbase2(ctx->Transform.ClipPlanesEnabled) + 1;
 317    }
 318
 319    /* _NEW_POLYGON */
 320    if (brw->gen < 6) {
 321       key->copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL ||
 322                             ctx->Polygon.BackMode != GL_FILL);
 323    }
 324
 325    if (prog->OutputsWritten & (VARYING_BIT_COL0 | VARYING_BIT_COL1 |
 326                                VARYING_BIT_BFC0 | VARYING_BIT_BFC1)) {
 327       /* _NEW_LIGHT | _NEW_BUFFERS */
 328       key->clamp_vertex_color = ctx->Light._ClampVertexColor;
 329    }
 330
 331    /* _NEW_POINT */
 332    if (brw->gen < 6 && ctx->Point.PointSprite) {
 333       for (i = 0; i < 8; i++) {
 334          if (ctx->Point.CoordReplace[i])
 335             key->point_coord_replace |= (1 << i);
 336       }
 337    }
 338
 339    /* _NEW_TEXTURE */
 340    brw_populate_sampler_prog_key_data(ctx, prog, brw->vs.base.sampler_count,
 341                                       &key->tex);
 342
 343    /* BRW_NEW_VS_ATTRIB_WORKAROUNDS */
 344    memcpy(key->gl_attrib_wa_flags, brw->vb.attrib_wa_flags,
 345           sizeof(brw->vb.attrib_wa_flags));
 346 }
 347
 348 void
 349 brw_upload_vs_prog(struct brw_context *brw)
 350 {
 351    struct gl_context *ctx = &brw->ctx;
 352    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 353    struct brw_vs_prog_key key;
 354    /* BRW_NEW_VERTEX_PROGRAM */
 355    struct brw_vertex_program *vp =
 356       (struct brw_vertex_program *)brw->vertex_program;
 357
 358    if (!brw_vs_state_dirty(brw))
 359       return;
 360
 361    brw_vs_populate_key(brw, &key);
 362
 363    if (!brw_search_cache(&brw->cache, BRW_CACHE_VS_PROG,
 364                          &key, sizeof(key),
 365                          &brw->vs.base.prog_offset, &brw->vs.prog_data)) {
 366       bool success = brw_codegen_vs_prog(brw, current[MESA_SHADER_VERTEX],
 367                                          vp, &key);
 368       (void) success;
 369       assert(success);
 370    }
 371    brw->vs.base.prog_data = &brw->vs.prog_data->base.base;
 372 }
 373
 374 bool
 375 brw_vs_precompile(struct gl_context *ctx,
 376                   struct gl_shader_program *shader_prog,
 377                   struct gl_program *prog)
 378 {
 379    struct brw_context *brw = brw_context(ctx);
 380    struct brw_vs_prog_key key;
 381    uint32_t old_prog_offset = brw->vs.base.prog_offset;
 382    struct brw_vs_prog_data *old_prog_data = brw->vs.prog_data;
 383    bool success;
 384
 385    struct gl_vertex_program *vp = (struct gl_vertex_program *) prog;
 386    struct brw_vertex_program *bvp = brw_vertex_program(vp);
 387
 388    memset(&key, 0, sizeof(key));
 389
 390    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 391    key.program_string_id = bvp->id;
 392    key.clamp_vertex_color =
 393       (prog->OutputsWritten & (VARYING_BIT_COL0 | VARYING_BIT_COL1 |
 394                                VARYING_BIT_BFC0 | VARYING_BIT_BFC1));
 395
 396    success = brw_codegen_vs_prog(brw, shader_prog, bvp, &key);
 397
 398    brw->vs.base.prog_offset = old_prog_offset;
 399    brw->vs.prog_data = old_prog_data;
 400
 401    return success;
 402 }