src/gallium/drivers/svga/svga_state_constants.c

   1
   2 /**********************************************************
   3  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person
   6  * obtaining a copy of this software and associated documentation
   7  * files (the "Software"), to deal in the Software without
   8  * restriction, including without limitation the rights to use, copy,
   9  * modify, merge, publish, distribute, sublicense, and/or sell copies
  10  * of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be
  14  * included in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  20  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  21  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  **********************************************************/
  26
  27 #include "util/u_format.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_memory.h"
  30 #include "pipe/p_defines.h"
  31 #include "util/u_upload_mgr.h"
  32
  33 #include "svga_screen.h"
  34 #include "svga_context.h"
  35 #include "svga_state.h"
  36 #include "svga_cmd.h"
  37 #include "svga_tgsi.h"
  38 #include "svga_debug.h"
  39 #include "svga_resource_buffer.h"
  40 #include "svga_shader.h"
  41
  42 #include "svga_hw_reg.h"
  43
  44
  45 /*
  46  * Don't try to send more than 4kb of successive constants.
  47  */
  48 #define MAX_CONST_REG_COUNT 256  /**< number of float[4] constants */
  49
  50 /**
  51  * Extra space for svga-specific VS/PS constants (such as texcoord
  52  * scale factors, vertex transformation scale/translation).
  53  */
  54 #define MAX_EXTRA_CONSTS 32
  55
  56 /** Guest-backed surface constant buffers must be this size */
  57 #define GB_CONSTBUF_SIZE (SVGA3D_CONSTREG_MAX)
  58
  59
  60 /**
  61  * Emit any extra shader-type-independent shader constants into the buffer
  62  * pointed to by 'dest'.
  63  * \return number of float[4] constants put into the 'dest' buffer
  64  */
  65 static unsigned
  66 svga_get_extra_constants_common(struct svga_context *svga,
  67                                 const struct svga_shader_variant *variant,
  68                                 unsigned shader, float *dest)
  69 {
  70    uint32_t *dest_u = (uint32_t *) dest;  // uint version of dest
  71    unsigned i;
  72    unsigned count = 0;
  73
  74    for (i = 0; i < variant->key.num_textures; i++) {
  75       struct pipe_sampler_view *sv = svga->curr.sampler_views[shader][i];
  76       if (sv) {
  77          struct pipe_resource *tex = sv->texture;
  78          /* Scaling factors needed for handling unnormalized texture coordinates
  79           * for texture rectangles.
  80           */
  81          if (variant->key.tex[i].unnormalized) {
  82             /* debug/sanity check */
  83             assert(variant->key.tex[i].width_height_idx == count);
  84
  85             *dest++ = 1.0 / (float)tex->width0;
  86             *dest++ = 1.0 / (float)tex->height0;
  87             *dest++ = 1.0;
  88             *dest++ = 1.0;
  89
  90             count++;
  91          }
  92
  93          /* Store the sizes for texture buffers.
  94          */
  95          if (tex->target == PIPE_BUFFER) {
  96             unsigned bytes_per_element = util_format_get_blocksize(sv->format);
  97             *dest_u++ = tex->width0 / bytes_per_element;
  98             *dest_u++ = 1;
  99             *dest_u++ = 1;
 100             *dest_u++ = 1;
 101
 102             count++;
 103          }
 104       }
 105    }
 106
 107    return count;
 108 }
 109
 110
 111 /**
 112  * Emit any extra fragment shader constants into the buffer pointed
 113  * to by 'dest'.
 114  * \return number of float[4] constants put into the dest buffer
 115  */
 116 static unsigned
 117 svga_get_extra_fs_constants(struct svga_context *svga, float *dest)
 118 {
 119    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
 120    unsigned count = 0;
 121
 122    count += svga_get_extra_constants_common(svga, variant,
 123                                             PIPE_SHADER_FRAGMENT, dest);
 124
 125    assert(count <= MAX_EXTRA_CONSTS);
 126
 127    return count;
 128 }
 129
 130 /**
 131  * Emit extra constants needed for prescale computation into the
 132  * the buffer pointed to by '*dest'. The updated buffer pointer
 133  * will be returned in 'dest'.
 134  */
 135 static unsigned
 136 svga_get_prescale_constants(struct svga_context *svga, float **dest)
 137 {
 138    memcpy(*dest, svga->state.hw_clear.prescale.scale, 4 * sizeof(float));
 139    *dest += 4;
 140
 141    memcpy(*dest, svga->state.hw_clear.prescale.translate, 4 * sizeof(float));
 142    *dest += 4;
 143
 144    return 2;
 145 }
 146
 147 /**
 148  * Emit extra constants needed for point sprite emulation.
 149  */
 150 static unsigned
 151 svga_get_pt_sprite_constants(struct svga_context *svga, float **dest)
 152 {
 153    struct svga_screen *screen = svga_screen(svga->pipe.screen);
 154    float *dst = *dest;
 155
 156    dst[0] = 1.0 / (svga->curr.viewport.scale[0] * 2);
 157    dst[1] = 1.0 / (svga->curr.viewport.scale[1] * 2);
 158    dst[2] = svga->curr.rast->pointsize;
 159    dst[3] = screen->maxPointSize;
 160    *dest = *dest + 4;
 161    return 1;
 162 }
 163
 164 /**
 165  * Emit user-defined clip plane coefficients into the buffer pointed to
 166  * by '*dest'. The updated buffer pointer will be returned in 'dest'.
 167  */
 168 static unsigned
 169 svga_get_clip_plane_constants(struct svga_context *svga,
 170                               const struct svga_shader_variant *variant,
 171                               float **dest)
 172 {
 173    unsigned count = 0;
 174
 175    /* SVGA_NEW_CLIP */
 176    if (svga_have_vgpu10(svga)) {
 177       /* append user-defined clip plane coefficients onto constant buffer */
 178       unsigned clip_planes = variant->key.clip_plane_enable;
 179       while (clip_planes) {
 180          int i = u_bit_scan(&clip_planes);
 181          COPY_4V(*dest, svga->curr.clip.ucp[i]);
 182          *dest += 4;
 183          count += 1;
 184       }
 185    }
 186    return count;
 187 }
 188
 189 /**
 190  * Emit any extra vertex shader constants into the buffer pointed
 191  * to by 'dest'.
 192  * In particular, these would be the scale and bias factors computed
 193  * from the framebuffer size which are used to copy with differences in
 194  * GL vs D3D coordinate spaces.  See svga_tgsi_insn.c for more info.
 195  * \return number of float[4] constants put into the dest buffer
 196  */
 197 static unsigned
 198 svga_get_extra_vs_constants(struct svga_context *svga, float *dest)
 199 {
 200    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
 201    unsigned count = 0;
 202
 203    /* SVGA_NEW_VS_VARIANT
 204     */
 205    if (variant->key.vs.need_prescale) {
 206       count += svga_get_prescale_constants(svga, &dest);
 207    }
 208
 209    if (variant->key.vs.undo_viewport) {
 210       /* Used to convert window coords back to NDC coords */
 211       dest[0] = 1.0f / svga->curr.viewport.scale[0];
 212       dest[1] = 1.0f / svga->curr.viewport.scale[1];
 213       dest[2] = -svga->curr.viewport.translate[0];
 214       dest[3] = -svga->curr.viewport.translate[1];
 215       dest += 4;
 216       count += 1;
 217    }
 218
 219    /* SVGA_NEW_CLIP */
 220    count += svga_get_clip_plane_constants(svga, variant, &dest);
 221
 222    /* common constants */
 223    count += svga_get_extra_constants_common(svga, variant,
 224                                             PIPE_SHADER_VERTEX, dest);
 225
 226    assert(count <= MAX_EXTRA_CONSTS);
 227
 228    return count;
 229 }
 230
 231 /**
 232  * Emit any extra geometry shader constants into the buffer pointed
 233  * to by 'dest'.
 234  */
 235 static unsigned
 236 svga_get_extra_gs_constants(struct svga_context *svga, float *dest)
 237 {
 238    const struct svga_shader_variant *variant = svga->state.hw_draw.gs;
 239    unsigned count = 0;
 240
 241    /* SVGA_NEW_GS_VARIANT
 242     */
 243
 244    /* Constants for point sprite
 245     * These are used in the transformed gs that supports point sprite.
 246     * They need to be added before the prescale constants.
 247     */
 248    if (variant->key.gs.wide_point) {
 249       count += svga_get_pt_sprite_constants(svga, &dest);
 250    }
 251
 252    if (variant->key.gs.need_prescale) {
 253       count += svga_get_prescale_constants(svga, &dest);
 254    }
 255
 256    /* SVGA_NEW_CLIP */
 257    count += svga_get_clip_plane_constants(svga, variant, &dest);
 258
 259    /* common constants */
 260    count += svga_get_extra_constants_common(svga, variant,
 261                                             PIPE_SHADER_GEOMETRY, dest);
 262
 263    assert(count <= MAX_EXTRA_CONSTS);
 264    return count;
 265 }
 266
 267 /**
 268  * Check and emit one shader constant register.
 269  * \param shader  PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX
 270  * \param i  which float[4] constant to change
 271  * \param value  the new float[4] value
 272  */
 273 static enum pipe_error
 274 emit_const(struct svga_context *svga, unsigned shader, unsigned i,
 275            const float *value)
 276 {
 277    enum pipe_error ret = PIPE_OK;
 278
 279    assert(shader < PIPE_SHADER_TYPES);
 280    assert(i < SVGA3D_CONSTREG_MAX);
 281    assert(!svga_have_vgpu10(svga));
 282
 283    if (memcmp(svga->state.hw_draw.cb[shader][i], value,
 284               4 * sizeof(float)) != 0) {
 285       if (SVGA_DEBUG & DEBUG_CONSTS)
 286          debug_printf("%s %s %u: %f %f %f %f\n",
 287                       __FUNCTION__,
 288                       shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 289                       i,
 290                       value[0],
 291                       value[1],
 292                       value[2],
 293                       value[3]);
 294
 295       ret = SVGA3D_SetShaderConst( svga->swc,
 296                                    i,
 297                                    svga_shader_type(shader),
 298                                    SVGA3D_CONST_TYPE_FLOAT,
 299                                    value );
 300       if (ret != PIPE_OK)
 301          return ret;
 302
 303       memcpy(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float));
 304    }
 305
 306    return ret;
 307 }
 308
 309
 310 /*
 311  * Check and emit a range of shader constant registers, trying to coalesce
 312  * successive shader constant updates in a single command in order to save
 313  * space on the command buffer.  This is a HWv8 feature.
 314  */
 315 static enum pipe_error
 316 emit_const_range(struct svga_context *svga,
 317                  unsigned shader,
 318                  unsigned offset,
 319                  unsigned count,
 320                  const float (*values)[4])
 321 {
 322    unsigned i, j;
 323    enum pipe_error ret;
 324
 325    assert(shader == PIPE_SHADER_VERTEX ||
 326           shader == PIPE_SHADER_FRAGMENT);
 327    assert(!svga_have_vgpu10(svga));
 328
 329 #ifdef DEBUG
 330    if (offset + count > SVGA3D_CONSTREG_MAX) {
 331       debug_printf("svga: too many constants (offset %u + count %u = %u (max = %u))\n",
 332                    offset, count, offset + count, SVGA3D_CONSTREG_MAX);
 333    }
 334 #endif
 335
 336    if (offset > SVGA3D_CONSTREG_MAX) {
 337       /* This isn't OK, but if we propagate an error all the way up we'll
 338        * just get into more trouble.
 339        * XXX note that offset is always zero at this time so this is moot.
 340        */
 341       return PIPE_OK;
 342    }
 343
 344    if (offset + count > SVGA3D_CONSTREG_MAX) {
 345       /* Just drop the extra constants for now.
 346        * Ideally we should not have allowed the app to create a shader
 347        * that exceeds our constant buffer size but there's no way to
 348        * express that in gallium at this time.
 349        */
 350       count = SVGA3D_CONSTREG_MAX - offset;
 351    }
 352
 353    i = 0;
 354    while (i < count) {
 355       if (memcmp(svga->state.hw_draw.cb[shader][offset + i],
 356                  values[i],
 357                  4 * sizeof(float)) != 0) {
 358          /* Found one dirty constant
 359           */
 360          if (SVGA_DEBUG & DEBUG_CONSTS)
 361             debug_printf("%s %s %d: %f %f %f %f\n",
 362                          __FUNCTION__,
 363                          shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 364                          offset + i,
 365                          values[i][0],
 366                          values[i][1],
 367                          values[i][2],
 368                          values[i][3]);
 369
 370          /* Look for more consecutive dirty constants.
 371           */
 372          j = i + 1;
 373          while (j < count &&
 374                 j < i + MAX_CONST_REG_COUNT &&
 375                 memcmp(svga->state.hw_draw.cb[shader][offset + j],
 376                        values[j],
 377                        4 * sizeof(float)) != 0) {
 378
 379             if (SVGA_DEBUG & DEBUG_CONSTS)
 380                debug_printf("%s %s %d: %f %f %f %f\n",
 381                             __FUNCTION__,
 382                             shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
 383                             offset + j,
 384                             values[j][0],
 385                             values[j][1],
 386                             values[j][2],
 387                             values[j][3]);
 388
 389             ++j;
 390          }
 391
 392          assert(j >= i + 1);
 393
 394          /* Send them all together.
 395           */
 396          if (svga_have_gb_objects(svga)) {
 397             ret = SVGA3D_SetGBShaderConstsInline(svga->swc,
 398                                                  offset + i, /* start */
 399                                                  j - i,  /* count */
 400                                                  svga_shader_type(shader),
 401                                                  SVGA3D_CONST_TYPE_FLOAT,
 402                                                  values + i);
 403          }
 404          else {
 405             ret = SVGA3D_SetShaderConsts(svga->swc,
 406                                          offset + i, j - i,
 407                                          svga_shader_type(shader),
 408                                          SVGA3D_CONST_TYPE_FLOAT,
 409                                          values + i);
 410          }
 411          if (ret != PIPE_OK) {
 412             return ret;
 413          }
 414
 415          /*
 416           * Local copy of the hardware state.
 417           */
 418          memcpy(svga->state.hw_draw.cb[shader][offset + i],
 419                 values[i],
 420                 (j - i) * 4 * sizeof(float));
 421
 422          i = j + 1;
 423       } else {
 424          ++i;
 425       }
 426    }
 427
 428    return PIPE_OK;
 429 }
 430
 431
 432 /**
 433  * Emit all the constants in a constant buffer for a shader stage.
 434  * On VGPU10, emit_consts_vgpu10 is used instead.
 435  */
 436 static enum pipe_error
 437 emit_consts_vgpu9(struct svga_context *svga, unsigned shader)
 438 {
 439    const struct pipe_constant_buffer *cbuf;
 440    struct svga_screen *ss = svga_screen(svga->pipe.screen);
 441    struct pipe_transfer *transfer = NULL;
 442    unsigned count;
 443    const float (*data)[4] = NULL;
 444    unsigned i;
 445    enum pipe_error ret = PIPE_OK;
 446    const unsigned offset = 0;
 447
 448    assert(shader < PIPE_SHADER_TYPES);
 449    assert(!svga_have_vgpu10(svga));
 450    /* Only one constant buffer per shader is supported before VGPU10.
 451     * This is only an approximate check against that.
 452     */
 453    assert(svga->curr.constbufs[shader][1].buffer == NULL);
 454
 455    cbuf = &svga->curr.constbufs[shader][0];
 456
 457    if (svga->curr.constbufs[shader][0].buffer) {
 458       /* emit user-provided constants */
 459       data = (const float (*)[4])
 460          pipe_buffer_map(&svga->pipe, svga->curr.constbufs[shader][0].buffer,
 461                          PIPE_TRANSFER_READ, &transfer);
 462       if (!data) {
 463          return PIPE_ERROR_OUT_OF_MEMORY;
 464       }
 465
 466       /* sanity check */
 467       assert(cbuf->buffer->width0 >=
 468              cbuf->buffer_size);
 469
 470       /* Use/apply the constant buffer size and offsets here */
 471       count = cbuf->buffer_size / (4 * sizeof(float));
 472       data += cbuf->buffer_offset / (4 * sizeof(float));
 473
 474       if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
 475          ret = emit_const_range( svga, shader, offset, count, data );
 476       }
 477       else {
 478          for (i = 0; i < count; i++) {
 479             ret = emit_const( svga, shader, offset + i, data[i] );
 480             if (ret != PIPE_OK) {
 481                break;
 482             }
 483          }
 484       }
 485
 486       pipe_buffer_unmap(&svga->pipe, transfer);
 487
 488       if (ret != PIPE_OK) {
 489          return ret;
 490       }
 491    }
 492
 493    /* emit extra shader constants */
 494    {
 495       const struct svga_shader_variant *variant = NULL;
 496       unsigned offset;
 497       float extras[MAX_EXTRA_CONSTS][4];
 498       unsigned count, i;
 499
 500       switch (shader) {
 501       case PIPE_SHADER_VERTEX:
 502          variant = svga->state.hw_draw.vs;
 503          count = svga_get_extra_vs_constants(svga, (float *) extras);
 504          break;
 505       case PIPE_SHADER_FRAGMENT:
 506          variant = svga->state.hw_draw.fs;
 507          count = svga_get_extra_fs_constants(svga, (float *) extras);
 508          break;
 509       default:
 510          assert(!"Unexpected shader type");
 511          count = 0;
 512       }
 513
 514       assert(variant);
 515       offset = variant->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 516       assert(count <= Elements(extras));
 517
 518       if (count > 0) {
 519          if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
 520             ret = emit_const_range(svga, shader, offset, count,
 521                                    (const float (*) [4])extras);
 522          }
 523          else {
 524             for (i = 0; i < count; i++) {
 525                ret = emit_const(svga, shader, offset + i, extras[i]);
 526                if (ret != PIPE_OK)
 527                   return ret;
 528             }
 529          }
 530       }
 531    }
 532
 533    return ret;
 534 }
 535
 536
 537
 538 static enum pipe_error
 539 emit_constbuf_vgpu10(struct svga_context *svga, unsigned shader)
 540 {
 541    const struct pipe_constant_buffer *cbuf;
 542    struct pipe_resource *dst_buffer = NULL;
 543    enum pipe_error ret = PIPE_OK;
 544    struct pipe_transfer *src_transfer;
 545    struct svga_winsys_surface *dst_handle;
 546    float extras[MAX_EXTRA_CONSTS][4];
 547    unsigned extra_count, extra_size, extra_offset;
 548    unsigned new_buf_size;
 549    void *src_map = NULL, *dst_map;
 550    unsigned offset;
 551    const struct svga_shader_variant *variant;
 552
 553    assert(shader == PIPE_SHADER_VERTEX ||
 554           shader == PIPE_SHADER_GEOMETRY ||
 555           shader == PIPE_SHADER_FRAGMENT);
 556
 557    cbuf = &svga->curr.constbufs[shader][0];
 558
 559    switch (shader) {
 560    case PIPE_SHADER_VERTEX:
 561       variant = svga->state.hw_draw.vs;
 562       extra_count = svga_get_extra_vs_constants(svga, (float *) extras);
 563       break;
 564    case PIPE_SHADER_FRAGMENT:
 565       variant = svga->state.hw_draw.fs;
 566       extra_count = svga_get_extra_fs_constants(svga, (float *) extras);
 567       break;
 568    case PIPE_SHADER_GEOMETRY:
 569       variant = svga->state.hw_draw.gs;
 570       extra_count = svga_get_extra_gs_constants(svga, (float *) extras);
 571       break;
 572    default:
 573       assert(!"Unexpected shader type");
 574       /* Don't return an error code since we don't want to keep re-trying
 575        * this function and getting stuck in an infinite loop.
 576        */
 577       return PIPE_OK;
 578    }
 579
 580    assert(variant);
 581
 582    /* Compute extra constants size and offset in bytes */
 583    extra_size = extra_count * 4 * sizeof(float);
 584    extra_offset = 4 * sizeof(float) * variant->extra_const_start;
 585
 586    if (cbuf->buffer_size + extra_size == 0)
 587       return PIPE_OK;  /* nothing to do */
 588
 589    /* Typically, the cbuf->buffer here is a user-space buffer so mapping
 590     * it is really cheap.  If we ever get real HW buffers for constants
 591     * we should void mapping and instead use a ResourceCopy command.
 592     */
 593    if (cbuf->buffer_size > 0) {
 594       src_map = pipe_buffer_map_range(&svga->pipe, cbuf->buffer,
 595                                       cbuf->buffer_offset, cbuf->buffer_size,
 596                                       PIPE_TRANSFER_READ, &src_transfer);
 597       assert(src_map);
 598       if (!src_map) {
 599          return PIPE_ERROR_OUT_OF_MEMORY;
 600       }
 601    }
 602
 603    /* The new/dest buffer's size must be large enough to hold the original,
 604     * user-specified constants, plus the extra constants.
 605     * The size of the original constant buffer _should_ agree with what the
 606     * shader is expecting, but it might not (it's not enforced anywhere by
 607     * gallium).
 608     */
 609    new_buf_size = MAX2(cbuf->buffer_size, extra_offset) + extra_size;
 610
 611    /* According to the DX10 spec, the constant buffer size must be
 612     * in multiples of 16.
 613     */
 614    new_buf_size = align(new_buf_size, 16);
 615
 616    u_upload_alloc(svga->const0_upload, 0, new_buf_size, &offset,
 617                   &dst_buffer, &dst_map);
 618    if (!dst_map) {
 619       if (src_map)
 620          pipe_buffer_unmap(&svga->pipe, src_transfer);
 621       return PIPE_ERROR_OUT_OF_MEMORY;
 622    }
 623
 624    if (src_map) {
 625       memcpy(dst_map, src_map, cbuf->buffer_size);
 626       pipe_buffer_unmap(&svga->pipe, src_transfer);
 627    }
 628
 629    if (extra_size) {
 630       assert(extra_offset + extra_size <= new_buf_size);
 631       memcpy((char *) dst_map + extra_offset, extras, extra_size);
 632    }
 633    u_upload_unmap(svga->const0_upload);
 634
 635    /* Issue the SetSingleConstantBuffer command */
 636    dst_handle = svga_buffer_handle(svga, dst_buffer);
 637    if (!dst_handle) {
 638       pipe_resource_reference(&dst_buffer, NULL);
 639       return PIPE_ERROR_OUT_OF_MEMORY;
 640    }
 641
 642    assert(new_buf_size % 16 == 0);
 643    ret = SVGA3D_vgpu10_SetSingleConstantBuffer(svga->swc,
 644                                                0, /* index */
 645                                                svga_shader_type(shader),
 646                                                dst_handle,
 647                                                offset,
 648                                                new_buf_size);
 649
 650    if (ret != PIPE_OK) {
 651       pipe_resource_reference(&dst_buffer, NULL);
 652       return ret;
 653    }
 654
 655    /* Save this const buffer until it's replaced in the future.
 656     * Otherwise, all references to the buffer will go away after the
 657     * command buffer is submitted, it'll get recycled and we will have
 658     * incorrect constant buffer bindings.
 659     */
 660    pipe_resource_reference(&svga->state.hw_draw.constbuf[shader], dst_buffer);
 661
 662    svga->state.hw_draw.default_constbuf_size[shader] = new_buf_size;
 663
 664    pipe_resource_reference(&dst_buffer, NULL);
 665
 666    return ret;
 667 }
 668
 669
 670 static enum pipe_error
 671 emit_consts_vgpu10(struct svga_context *svga, unsigned shader)
 672 {
 673    enum pipe_error ret;
 674    unsigned dirty_constbufs;
 675    unsigned enabled_constbufs;
 676
 677    /* Emit 0th constant buffer (with extra constants) */
 678    ret = emit_constbuf_vgpu10(svga, shader);
 679    if (ret != PIPE_OK) {
 680       return ret;
 681    }
 682
 683    enabled_constbufs = svga->state.hw_draw.enabled_constbufs[shader] | 1u;
 684
 685    /* Emit other constant buffers (UBOs) */
 686    dirty_constbufs = svga->state.dirty_constbufs[shader] & ~1u;
 687
 688    while (dirty_constbufs) {
 689       unsigned index = u_bit_scan(&dirty_constbufs);
 690       unsigned offset = svga->curr.constbufs[shader][index].buffer_offset;
 691       unsigned size = svga->curr.constbufs[shader][index].buffer_size;
 692       struct svga_buffer *buffer =
 693          svga_buffer(svga->curr.constbufs[shader][index].buffer);
 694       struct svga_winsys_surface *handle;
 695
 696       if (buffer) {
 697          handle = svga_buffer_handle(svga, &buffer->b.b);
 698          enabled_constbufs |= 1 << index;
 699       }
 700       else {
 701          handle = NULL;
 702          enabled_constbufs &= ~(1 << index);
 703          assert(offset == 0);
 704          assert(size == 0);
 705       }
 706
 707       if (size % 16 != 0) {
 708          /* GL's buffer range sizes can be any number of bytes but the
 709           * SVGA3D device requires a multiple of 16 bytes.
 710           */
 711          const unsigned total_size = buffer->b.b.width0;
 712
 713          if (offset + align(size, 16) <= total_size) {
 714             /* round up size to multiple of 16 */
 715             size = align(size, 16);
 716          }
 717          else {
 718             /* round down to mulitple of 16 (this may cause rendering problems
 719              * but should avoid a device error).
 720              */
 721             size &= ~15;
 722          }
 723       }
 724
 725       assert(size % 16 == 0);
 726       ret = SVGA3D_vgpu10_SetSingleConstantBuffer(svga->swc,
 727                                                   index,
 728                                                   svga_shader_type(shader),
 729                                                   handle,
 730                                                   offset,
 731                                                   size);
 732       if (ret != PIPE_OK)
 733          return ret;
 734    }
 735
 736    svga->state.hw_draw.enabled_constbufs[shader] = enabled_constbufs;
 737    svga->state.dirty_constbufs[shader] = 0;
 738
 739    return ret;
 740 }
 741
 742 static enum pipe_error
 743 emit_fs_consts(struct svga_context *svga, unsigned dirty)
 744 {
 745    const struct svga_shader_variant *variant = svga->state.hw_draw.fs;
 746    enum pipe_error ret = PIPE_OK;
 747
 748    /* SVGA_NEW_FS_VARIANT
 749     */
 750    if (!variant)
 751       return PIPE_OK;
 752
 753    /* SVGA_NEW_FS_CONST_BUFFER
 754     */
 755    if (svga_have_vgpu10(svga)) {
 756       ret = emit_consts_vgpu10(svga, PIPE_SHADER_FRAGMENT);
 757    }
 758    else {
 759       ret = emit_consts_vgpu9(svga, PIPE_SHADER_FRAGMENT);
 760    }
 761
 762    return ret;
 763 }
 764
 765
 766 struct svga_tracked_state svga_hw_fs_constants =
 767 {
 768    "hw fs params",
 769    (SVGA_NEW_FS_CONST_BUFFER |
 770     SVGA_NEW_FS_VARIANT |
 771     SVGA_NEW_TEXTURE_BINDING),
 772    emit_fs_consts
 773 };
 774
 775
 776
 777 static enum pipe_error
 778 emit_vs_consts(struct svga_context *svga, unsigned dirty)
 779 {
 780    const struct svga_shader_variant *variant = svga->state.hw_draw.vs;
 781    enum pipe_error ret = PIPE_OK;
 782
 783    /* SVGA_NEW_VS_VARIANT
 784     */
 785    if (!variant)
 786       return PIPE_OK;
 787
 788    /* SVGA_NEW_VS_CONST_BUFFER
 789     */
 790    if (svga_have_vgpu10(svga)) {
 791       ret = emit_consts_vgpu10(svga, PIPE_SHADER_VERTEX);
 792    }
 793    else {
 794       ret = emit_consts_vgpu9(svga, PIPE_SHADER_VERTEX);
 795    }
 796
 797    return ret;
 798 }
 799
 800
 801 struct svga_tracked_state svga_hw_vs_constants =
 802 {
 803    "hw vs params",
 804    (SVGA_NEW_PRESCALE |
 805     SVGA_NEW_VS_CONST_BUFFER |
 806     SVGA_NEW_VS_VARIANT),
 807    emit_vs_consts
 808 };
 809
 810
 811 static enum pipe_error
 812 emit_gs_consts(struct svga_context *svga, unsigned dirty)
 813 {
 814    const struct svga_shader_variant *variant = svga->state.hw_draw.gs;
 815    enum pipe_error ret = PIPE_OK;
 816
 817    /* SVGA_NEW_GS_VARIANT
 818     */
 819    if (!variant)
 820       return PIPE_OK;
 821
 822    /* SVGA_NEW_GS_CONST_BUFFER
 823     */
 824    if (svga_have_vgpu10(svga)) {
 825       /**
 826        * If only the rasterizer state has changed and the current geometry
 827        * shader does not emit wide points, then there is no reason to
 828        * re-emit the GS constants, so skip it.
 829        */
 830       if (dirty == SVGA_NEW_RAST && !variant->key.gs.wide_point)
 831          return PIPE_OK;
 832
 833       ret = emit_consts_vgpu10(svga, PIPE_SHADER_GEOMETRY);
 834    }
 835
 836    return ret;
 837 }
 838
 839
 840 struct svga_tracked_state svga_hw_gs_constants =
 841 {
 842    "hw gs params",
 843    (SVGA_NEW_GS_CONST_BUFFER |
 844     SVGA_NEW_RAST |
 845     SVGA_NEW_GS_VARIANT),
 846    emit_gs_consts
 847 };