src/gallium/drivers/svga/svga_state_constants.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "util/u_inlines.h"
  27 #include "util/u_memory.h"
  28 #include "pipe/p_defines.h"
  29
  30 #include "svga_screen.h"
  31 #include "svga_context.h"
  32 #include "svga_state.h"
  33 #include "svga_cmd.h"
  34 #include "svga_tgsi.h"
  35 #include "svga_debug.h"
  36 #include "svga_resource_buffer.h"
  37
  38 #include "svga_hw_reg.h"
  39
  40
  41 /*
  42  * Don't try to send more than 4kb of successive constants.
  43  */
  44 #define MAX_CONST_REG_COUNT 256  /**< number of float[4] constants */
  45
  46 /**
  47  * Extra space for svga-specific VS/PS constants (such as texcoord
  48  * scale factors, vertex transformation scale/translation).
  49  */
  50 #define MAX_EXTRA_CONSTS 32
  51
  52 /** Guest-backed surface constant buffers must be this size */
  53 #define GB_CONSTBUF_SIZE (SVGA3D_CONSTREG_MAX)
  54
  55 /**
  56  * Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
  57  */
  58 static unsigned
  59 svga_shader_type(unsigned shader)
  60 {
  61    switch (shader) {
  62    case PIPE_SHADER_VERTEX:
  63       return SVGA3D_SHADERTYPE_VS;
  64    case PIPE_SHADER_FRAGMENT:
  65       return SVGA3D_SHADERTYPE_PS;
  66    default:
  67       assert(!"Unexpected shader type");
  68       return SVGA3D_SHADERTYPE_VS;
  69    }
  70 }
  71
  72
  73 /**
  74  * Emit any extra fragment shader constants into the buffer pointed
  75  * to by 'dest'.
  76  * In particular, these would be the scaling factors needed for handling
  77  * unnormalized texture coordinates for texture rectangles.
  78  * \return number of float[4] constants put into the dest buffer
  79  */
  80 static unsigned
  81 svga_get_extra_fs_constants(struct svga_context *svga, float *dest)
  82 {
  83    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
  84    const struct svga_fs_compile_key *key = &variant->key.fkey;
  85    unsigned count = 0;
  86
  87    /* SVGA_NEW_VS_VARIANT
  88     */
  89    if (key->num_unnormalized_coords) {
  90       unsigned i;
  91
  92       for (i = 0; i < key->num_textures; i++) {
  93          if (key->tex[i].unnormalized) {
  94             struct pipe_resource *tex = svga->curr.sampler_views[i]->texture;
  95
  96             /* debug/sanity check */
  97             assert(key->tex[i].width_height_idx == count);
  98
  99             *dest++ = 1.0 / (float)tex->width0;
 100             *dest++ = 1.0 / (float)tex->height0;
 101             *dest++ = 1.0;
 102             *dest++ = 1.0;
 103
 104             count++;
 105          }
 106       }
 107    }
 108
 109    assert(count <= MAX_EXTRA_CONSTS);
 110
 111    return count;
 112 }
 113
 114
 115 /**
 116  * Emit any extra vertex shader constants into the buffer pointed
 117  * to by 'dest'.
 118  * In particular, these would be the scale and bias factors computed
 119  * from the framebuffer size which are used to copy with differences in
 120  * GL vs D3D coordinate spaces.  See svga_tgsi_insn.c for more info.
 121  * \return number of float[4] constants put into the dest buffer
 122  */
 123 static unsigned
 124 svga_get_extra_vs_constants(struct svga_context *svga, float *dest)
 125 {
 126    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
 127    const struct svga_vs_compile_key *key = &variant->key.vkey;
 128    unsigned count = 0;
 129
 130    /* SVGA_NEW_VS_VARIANT
 131     */
 132    if (key->need_prescale) {
 133       memcpy(dest, svga->state.hw_clear.prescale.scale, 4 * sizeof(float));
 134       dest += 4;
 135
 136       memcpy(dest, svga->state.hw_clear.prescale.translate, 4 * sizeof(float));
 137       dest += 4;
 138
 139       count = 2;
 140    }
 141
 142    assert(count <= MAX_EXTRA_CONSTS);
 143
 144    return count;
 145 }
 146
 147
 148 /**
 149  * Check and emit one shader constant register.
 150  * \param shader  PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX
 151  * \param i  which float[4] constant to change
 152  * \param value  the new float[4] value
 153  */
 154 static enum pipe_error
 155 emit_const(struct svga_context *svga, unsigned shader, unsigned i,
 156            const float *value)
 157 {
 158    enum pipe_error ret = PIPE_OK;
 159
 160    assert(shader < PIPE_SHADER_TYPES);
 161    assert(i < SVGA3D_CONSTREG_MAX);
 162
 163    if (memcmp(svga->state.hw_draw.cb[shader][i], value,
 164               4 * sizeof(float)) != 0) {
 165       if (SVGA_DEBUG & DEBUG_CONSTS)
 166          debug_printf("%s %s %u: %f %f %f %f\n",
 167                       __FUNCTION__,
 168                       shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 169                       i,
 170                       value[0],
 171                       value[1],
 172                       value[2],
 173                       value[3]);
 174
 175       ret = SVGA3D_SetShaderConst( svga->swc,
 176                                    i,
 177                                    svga_shader_type(shader),
 178                                    SVGA3D_CONST_TYPE_FLOAT,
 179                                    value );
 180       if (ret != PIPE_OK)
 181          return ret;
 182
 183       memcpy(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float));
 184    }
 185
 186    return ret;
 187 }
 188
 189
 190 /*
 191  * Check and emit a range of shader constant registers, trying to coalesce
 192  * successive shader constant updates in a single command in order to save
 193  * space on the command buffer.  This is a HWv8 feature.
 194  */
 195 static enum pipe_error
 196 emit_const_range(struct svga_context *svga,
 197                  unsigned shader,
 198                  unsigned offset,
 199                  unsigned count,
 200                  const float (*values)[4])
 201 {
 202    unsigned i, j;
 203    enum pipe_error ret;
 204
 205 #ifdef DEBUG
 206    if (offset + count > SVGA3D_CONSTREG_MAX) {
 207       debug_printf("svga: too many constants (offset %u + count %u = %u (max = %u))\n",
 208                    offset, count, offset + count, SVGA3D_CONSTREG_MAX);
 209    }
 210 #endif
 211
 212    if (offset > SVGA3D_CONSTREG_MAX) {
 213       /* This isn't OK, but if we propagate an error all the way up we'll
 214        * just get into more trouble.
 215        * XXX note that offset is always zero at this time so this is moot.
 216        */
 217       return PIPE_OK;
 218    }
 219
 220    if (offset + count > SVGA3D_CONSTREG_MAX) {
 221       /* Just drop the extra constants for now.
 222        * Ideally we should not have allowed the app to create a shader
 223        * that exceeds our constant buffer size but there's no way to
 224        * express that in gallium at this time.
 225        */
 226       count = SVGA3D_CONSTREG_MAX - offset;
 227    }
 228
 229    i = 0;
 230    while (i < count) {
 231       if (memcmp(svga->state.hw_draw.cb[shader][offset + i],
 232                  values[i],
 233                  4 * sizeof(float)) != 0) {
 234          /* Found one dirty constant
 235           */
 236          if (SVGA_DEBUG & DEBUG_CONSTS)
 237             debug_printf("%s %s %d: %f %f %f %f\n",
 238                          __FUNCTION__,
 239                          shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 240                          offset + i,
 241                          values[i][0],
 242                          values[i][1],
 243                          values[i][2],
 244                          values[i][3]);
 245
 246          /* Look for more consecutive dirty constants.
 247           */
 248          j = i + 1;
 249          while (j < count &&
 250                 j < i + MAX_CONST_REG_COUNT &&
 251                 memcmp(svga->state.hw_draw.cb[shader][offset + j],
 252                        values[j],
 253                        4 * sizeof(float)) != 0) {
 254
 255             if (SVGA_DEBUG & DEBUG_CONSTS)
 256                debug_printf("%s %s %d: %f %f %f %f\n",
 257                             __FUNCTION__,
 258                             shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 259                             offset + j,
 260                             values[j][0],
 261                             values[j][1],
 262                             values[j][2],
 263                             values[j][3]);
 264
 265             ++j;
 266          }
 267
 268          assert(j >= i + 1);
 269
 270          /* Send them all together.
 271           */
 272          if (svga_have_gb_objects(svga)) {
 273             ret = SVGA3D_SetGBShaderConstsInline(svga->swc,
 274                                                  offset + i, /* start */
 275                                                  j - i,  /* count */
 276                                                  svga_shader_type(shader),
 277                                                  SVGA3D_CONST_TYPE_FLOAT,
 278                                                  values + i);
 279          }
 280          else {
 281             ret = SVGA3D_SetShaderConsts(svga->swc,
 282                                          offset + i, j - i,
 283                                          svga_shader_type(shader),
 284                                          SVGA3D_CONST_TYPE_FLOAT,
 285                                          values + i);
 286          }
 287          if (ret != PIPE_OK) {
 288             return ret;
 289          }
 290
 291          /*
 292           * Local copy of the hardware state.
 293           */
 294          memcpy(svga->state.hw_draw.cb[shader][offset + i],
 295                 values[i],
 296                 (j - i) * 4 * sizeof(float));
 297
 298          i = j + 1;
 299       } else {
 300          ++i;
 301       }
 302    }
 303
 304    return PIPE_OK;
 305 }
 306
 307
 308 /**
 309  * Emit all the constants in a constant buffer for a shader stage.
 310  */
 311 static enum pipe_error
 312 emit_consts(struct svga_context *svga, unsigned shader)
 313 {
 314    struct svga_screen *ss = svga_screen(svga->pipe.screen);
 315    struct pipe_transfer *transfer = NULL;
 316    unsigned count;
 317    const float (*data)[4] = NULL;
 318    unsigned i;
 319    enum pipe_error ret = PIPE_OK;
 320    const unsigned offset = 0;
 321
 322    assert(shader < PIPE_SHADER_TYPES);
 323
 324    if (svga->curr.cbufs[shader].buffer == NULL)
 325       goto done;
 326
 327    data = (const float (*)[4])pipe_buffer_map(&svga->pipe,
 328                                               svga->curr.cbufs[shader].buffer,
 329                                               PIPE_TRANSFER_READ,
 330                                               &transfer);
 331    if (data == NULL) {
 332       ret = PIPE_ERROR_OUT_OF_MEMORY;
 333       goto done;
 334    }
 335
 336    /* sanity check */
 337    assert(svga->curr.cbufs[shader].buffer->width0 >=
 338           svga->curr.cbufs[shader].buffer_size);
 339
 340    /* Use/apply the constant buffer size and offsets here */
 341    count = svga->curr.cbufs[shader].buffer_size / (4 * sizeof(float));
 342    data += svga->curr.cbufs[shader].buffer_offset / (4 * sizeof(float));
 343
 344    if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
 345       ret = emit_const_range( svga, shader, offset, count, data );
 346       if (ret != PIPE_OK) {
 347          goto done;
 348       }
 349    } else {
 350       for (i = 0; i < count; i++) {
 351          ret = emit_const( svga, shader, offset + i, data[i] );
 352          if (ret != PIPE_OK) {
 353             goto done;
 354          }
 355       }
 356    }
 357
 358 done:
 359    if (data)
 360       pipe_buffer_unmap(&svga->pipe, transfer);
 361
 362    return ret;
 363 }
 364
 365
 366 static enum pipe_error
 367 emit_fs_consts(struct svga_context *svga, unsigned dirty)
 368 {
 369    struct svga_screen *ss = svga_screen(svga->pipe.screen);
 370    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
 371    enum pipe_error ret = PIPE_OK;
 372
 373    /* SVGA_NEW_FS_VARIANT
 374     */
 375    if (variant == NULL)
 376       return PIPE_OK;
 377
 378    /* SVGA_NEW_FS_CONST_BUFFER
 379     */
 380    ret = emit_consts( svga, PIPE_SHADER_FRAGMENT );
 381    if (ret != PIPE_OK)
 382       return ret;
 383
 384    /* emit extra shader constants */
 385    {
 386       unsigned offset = variant->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 387       float extras[MAX_EXTRA_CONSTS][4];
 388       unsigned count, i;
 389
 390       count = svga_get_extra_fs_constants(svga, (float *) extras);
 391
 392       if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
 393          ret = emit_const_range(svga, PIPE_SHADER_FRAGMENT, offset, count,
 394                                 (const float (*) [4])extras);
 395       } else {
 396          for (i = 0; i < count; i++) {
 397             ret = emit_const(svga, PIPE_SHADER_FRAGMENT, offset + i, extras[i]);
 398             if (ret != PIPE_OK)
 399                return ret;
 400          }
 401       }
 402    }
 403
 404    return ret;
 405 }
 406
 407
 408 struct svga_tracked_state svga_hw_fs_constants =
 409 {
 410    "hw fs params",
 411    (SVGA_NEW_FS_CONST_BUFFER |
 412     SVGA_NEW_FS_VARIANT |
 413     SVGA_NEW_TEXTURE_BINDING),
 414    emit_fs_consts
 415 };
 416
 417
 418
 419 static enum pipe_error
 420 emit_vs_consts(struct svga_context *svga, unsigned dirty)
 421 {
 422    struct svga_screen *ss = svga_screen(svga->pipe.screen);
 423    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
 424    enum pipe_error ret = PIPE_OK;
 425
 426    /* SVGA_NEW_VS_VARIANT
 427     */
 428    if (variant == NULL)
 429       return PIPE_OK;
 430
 431    /* SVGA_NEW_VS_CONST_BUFFER
 432     */
 433    ret = emit_consts( svga, PIPE_SHADER_VERTEX );
 434    if (ret != PIPE_OK)
 435       return ret;
 436
 437    /* emit extra shader constants */
 438    {
 439       unsigned offset = variant->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 440       float extras[MAX_EXTRA_CONSTS][4];
 441       unsigned count, i;
 442
 443       count = svga_get_extra_vs_constants(svga, (float *) extras);
 444       assert(count <= Elements(extras));
 445
 446       if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
 447          ret = emit_const_range(svga, PIPE_SHADER_VERTEX, offset, count,
 448                                 (const float (*) [4]) extras);
 449       } else {
 450          for (i = 0; i < count; i++) {
 451             ret = emit_const(svga, PIPE_SHADER_VERTEX, offset + i, extras[i]);
 452             if (ret != PIPE_OK)
 453                return ret;
 454          }
 455       }
 456    }
 457
 458    return ret;
 459 }
 460
 461
 462 struct svga_tracked_state svga_hw_vs_constants =
 463 {
 464    "hw vs params",
 465    (SVGA_NEW_PRESCALE |
 466     SVGA_NEW_VS_CONST_BUFFER |
 467     SVGA_NEW_VS_VARIANT),
 468    emit_vs_consts
 469 };