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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "main/glheader.h"
  29 #include "main/bufferobj.h"
  30 #include "main/context.h"
  31 #include "main/enums.h"
  32 #include "main/macros.h"
  33 #include "main/glformats.h"
  34
  35 #include "brw_draw.h"
  36 #include "brw_defines.h"
  37 #include "brw_context.h"
  38 #include "brw_state.h"
  39
  40 #include "intel_batchbuffer.h"
  41 #include "intel_buffer_objects.h"
  42
  43 static GLuint double_types[5] = {
  44    0,
  45    BRW_SURFACEFORMAT_R64_FLOAT,
  46    BRW_SURFACEFORMAT_R64G64_FLOAT,
  47    BRW_SURFACEFORMAT_R64G64B64_FLOAT,
  48    BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
  49 };
  50
  51 static GLuint float_types[5] = {
  52    0,
  53    BRW_SURFACEFORMAT_R32_FLOAT,
  54    BRW_SURFACEFORMAT_R32G32_FLOAT,
  55    BRW_SURFACEFORMAT_R32G32B32_FLOAT,
  56    BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
  57 };
  58
  59 static GLuint half_float_types[5] = {
  60    0,
  61    BRW_SURFACEFORMAT_R16_FLOAT,
  62    BRW_SURFACEFORMAT_R16G16_FLOAT,
  63    BRW_SURFACEFORMAT_R16G16B16A16_FLOAT,
  64    BRW_SURFACEFORMAT_R16G16B16A16_FLOAT
  65 };
  66
  67 static GLuint fixed_point_types[5] = {
  68    0,
  69    BRW_SURFACEFORMAT_R32_SFIXED,
  70    BRW_SURFACEFORMAT_R32G32_SFIXED,
  71    BRW_SURFACEFORMAT_R32G32B32_SFIXED,
  72    BRW_SURFACEFORMAT_R32G32B32A32_SFIXED,
  73 };
  74
  75 static GLuint uint_types_direct[5] = {
  76    0,
  77    BRW_SURFACEFORMAT_R32_UINT,
  78    BRW_SURFACEFORMAT_R32G32_UINT,
  79    BRW_SURFACEFORMAT_R32G32B32_UINT,
  80    BRW_SURFACEFORMAT_R32G32B32A32_UINT
  81 };
  82
  83 static GLuint uint_types_norm[5] = {
  84    0,
  85    BRW_SURFACEFORMAT_R32_UNORM,
  86    BRW_SURFACEFORMAT_R32G32_UNORM,
  87    BRW_SURFACEFORMAT_R32G32B32_UNORM,
  88    BRW_SURFACEFORMAT_R32G32B32A32_UNORM
  89 };
  90
  91 static GLuint uint_types_scale[5] = {
  92    0,
  93    BRW_SURFACEFORMAT_R32_USCALED,
  94    BRW_SURFACEFORMAT_R32G32_USCALED,
  95    BRW_SURFACEFORMAT_R32G32B32_USCALED,
  96    BRW_SURFACEFORMAT_R32G32B32A32_USCALED
  97 };
  98
  99 static GLuint int_types_direct[5] = {
 100    0,
 101    BRW_SURFACEFORMAT_R32_SINT,
 102    BRW_SURFACEFORMAT_R32G32_SINT,
 103    BRW_SURFACEFORMAT_R32G32B32_SINT,
 104    BRW_SURFACEFORMAT_R32G32B32A32_SINT
 105 };
 106
 107 static GLuint int_types_norm[5] = {
 108    0,
 109    BRW_SURFACEFORMAT_R32_SNORM,
 110    BRW_SURFACEFORMAT_R32G32_SNORM,
 111    BRW_SURFACEFORMAT_R32G32B32_SNORM,
 112    BRW_SURFACEFORMAT_R32G32B32A32_SNORM
 113 };
 114
 115 static GLuint int_types_scale[5] = {
 116    0,
 117    BRW_SURFACEFORMAT_R32_SSCALED,
 118    BRW_SURFACEFORMAT_R32G32_SSCALED,
 119    BRW_SURFACEFORMAT_R32G32B32_SSCALED,
 120    BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
 121 };
 122
 123 static GLuint ushort_types_direct[5] = {
 124    0,
 125    BRW_SURFACEFORMAT_R16_UINT,
 126    BRW_SURFACEFORMAT_R16G16_UINT,
 127    BRW_SURFACEFORMAT_R16G16B16A16_UINT,
 128    BRW_SURFACEFORMAT_R16G16B16A16_UINT
 129 };
 130
 131 static GLuint ushort_types_norm[5] = {
 132    0,
 133    BRW_SURFACEFORMAT_R16_UNORM,
 134    BRW_SURFACEFORMAT_R16G16_UNORM,
 135    BRW_SURFACEFORMAT_R16G16B16_UNORM,
 136    BRW_SURFACEFORMAT_R16G16B16A16_UNORM
 137 };
 138
 139 static GLuint ushort_types_scale[5] = {
 140    0,
 141    BRW_SURFACEFORMAT_R16_USCALED,
 142    BRW_SURFACEFORMAT_R16G16_USCALED,
 143    BRW_SURFACEFORMAT_R16G16B16_USCALED,
 144    BRW_SURFACEFORMAT_R16G16B16A16_USCALED
 145 };
 146
 147 static GLuint short_types_direct[5] = {
 148    0,
 149    BRW_SURFACEFORMAT_R16_SINT,
 150    BRW_SURFACEFORMAT_R16G16_SINT,
 151    BRW_SURFACEFORMAT_R16G16B16A16_SINT,
 152    BRW_SURFACEFORMAT_R16G16B16A16_SINT
 153 };
 154
 155 static GLuint short_types_norm[5] = {
 156    0,
 157    BRW_SURFACEFORMAT_R16_SNORM,
 158    BRW_SURFACEFORMAT_R16G16_SNORM,
 159    BRW_SURFACEFORMAT_R16G16B16_SNORM,
 160    BRW_SURFACEFORMAT_R16G16B16A16_SNORM
 161 };
 162
 163 static GLuint short_types_scale[5] = {
 164    0,
 165    BRW_SURFACEFORMAT_R16_SSCALED,
 166    BRW_SURFACEFORMAT_R16G16_SSCALED,
 167    BRW_SURFACEFORMAT_R16G16B16_SSCALED,
 168    BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
 169 };
 170
 171 static GLuint ubyte_types_direct[5] = {
 172    0,
 173    BRW_SURFACEFORMAT_R8_UINT,
 174    BRW_SURFACEFORMAT_R8G8_UINT,
 175    BRW_SURFACEFORMAT_R8G8B8A8_UINT,
 176    BRW_SURFACEFORMAT_R8G8B8A8_UINT
 177 };
 178
 179 static GLuint ubyte_types_norm[5] = {
 180    0,
 181    BRW_SURFACEFORMAT_R8_UNORM,
 182    BRW_SURFACEFORMAT_R8G8_UNORM,
 183    BRW_SURFACEFORMAT_R8G8B8_UNORM,
 184    BRW_SURFACEFORMAT_R8G8B8A8_UNORM
 185 };
 186
 187 static GLuint ubyte_types_scale[5] = {
 188    0,
 189    BRW_SURFACEFORMAT_R8_USCALED,
 190    BRW_SURFACEFORMAT_R8G8_USCALED,
 191    BRW_SURFACEFORMAT_R8G8B8_USCALED,
 192    BRW_SURFACEFORMAT_R8G8B8A8_USCALED
 193 };
 194
 195 static GLuint byte_types_direct[5] = {
 196    0,
 197    BRW_SURFACEFORMAT_R8_SINT,
 198    BRW_SURFACEFORMAT_R8G8_SINT,
 199    BRW_SURFACEFORMAT_R8G8B8A8_SINT,
 200    BRW_SURFACEFORMAT_R8G8B8A8_SINT
 201 };
 202
 203 static GLuint byte_types_norm[5] = {
 204    0,
 205    BRW_SURFACEFORMAT_R8_SNORM,
 206    BRW_SURFACEFORMAT_R8G8_SNORM,
 207    BRW_SURFACEFORMAT_R8G8B8_SNORM,
 208    BRW_SURFACEFORMAT_R8G8B8A8_SNORM
 209 };
 210
 211 static GLuint byte_types_scale[5] = {
 212    0,
 213    BRW_SURFACEFORMAT_R8_SSCALED,
 214    BRW_SURFACEFORMAT_R8G8_SSCALED,
 215    BRW_SURFACEFORMAT_R8G8B8_SSCALED,
 216    BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
 217 };
 218
 219
 220 /**
 221  * Given vertex array type/size/format/normalized info, return
 222  * the appopriate hardware surface type.
 223  * Format will be GL_RGBA or possibly GL_BGRA for GLubyte[4] color arrays.
 224  */
 225 static unsigned
 226 get_surface_type(struct brw_context *brw,
 227                  const struct gl_client_array *glarray)
 228 {
 229    int size = glarray->Size;
 230
 231    if (unlikely(INTEL_DEBUG & DEBUG_VERTS))
 232       printf("type %s size %d normalized %d\n",
 233              _mesa_lookup_enum_by_nr(glarray->Type),
 234              glarray->Size, glarray->Normalized);
 235
 236    if (glarray->Integer) {
 237       assert(glarray->Format == GL_RGBA); /* sanity check */
 238       switch (glarray->Type) {
 239       case GL_INT: return int_types_direct[size];
 240       case GL_SHORT: return short_types_direct[size];
 241       case GL_BYTE: return byte_types_direct[size];
 242       case GL_UNSIGNED_INT: return uint_types_direct[size];
 243       case GL_UNSIGNED_SHORT: return ushort_types_direct[size];
 244       case GL_UNSIGNED_BYTE: return ubyte_types_direct[size];
 245       default: assert(0); return 0;
 246       }
 247    } else if (glarray->Normalized) {
 248       switch (glarray->Type) {
 249       case GL_DOUBLE: return double_types[size];
 250       case GL_FLOAT: return float_types[size];
 251       case GL_HALF_FLOAT: return half_float_types[size];
 252       case GL_INT: return int_types_norm[size];
 253       case GL_SHORT: return short_types_norm[size];
 254       case GL_BYTE: return byte_types_norm[size];
 255       case GL_UNSIGNED_INT: return uint_types_norm[size];
 256       case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
 257       case GL_UNSIGNED_BYTE:
 258          if (glarray->Format == GL_BGRA) {
 259             /* See GL_EXT_vertex_array_bgra */
 260             assert(size == 4);
 261             return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 262          }
 263          else {
 264             return ubyte_types_norm[size];
 265          }
 266       case GL_FIXED:
 267          if (brw->gen >= 8 || brw->is_haswell)
 268             return fixed_point_types[size];
 269
 270          /* This produces GL_FIXED inputs as values between INT32_MIN and
 271           * INT32_MAX, which will be scaled down by 1/65536 by the VS.
 272           */
 273          return int_types_scale[size];
 274       /* See GL_ARB_vertex_type_2_10_10_10_rev.
 275        * W/A: Pre-Haswell, the hardware doesn't really support the formats we'd
 276        * like to use here, so upload everything as UINT and fix
 277        * it in the shader
 278        */
 279       case GL_INT_2_10_10_10_REV:
 280          assert(size == 4);
 281          if (brw->gen >= 8 || brw->is_haswell) {
 282             return glarray->Format == GL_BGRA
 283                ? BRW_SURFACEFORMAT_B10G10R10A2_SNORM
 284                : BRW_SURFACEFORMAT_R10G10B10A2_SNORM;
 285          }
 286          return BRW_SURFACEFORMAT_R10G10B10A2_UINT;
 287       case GL_UNSIGNED_INT_2_10_10_10_REV:
 288          assert(size == 4);
 289          if (brw->gen >= 8 || brw->is_haswell) {
 290             return glarray->Format == GL_BGRA
 291                ? BRW_SURFACEFORMAT_B10G10R10A2_UNORM
 292                : BRW_SURFACEFORMAT_R10G10B10A2_UNORM;
 293          }
 294          return BRW_SURFACEFORMAT_R10G10B10A2_UINT;
 295       default: assert(0); return 0;
 296       }
 297    }
 298    else {
 299       /* See GL_ARB_vertex_type_2_10_10_10_rev.
 300        * W/A: the hardware doesn't really support the formats we'd
 301        * like to use here, so upload everything as UINT and fix
 302        * it in the shader
 303        */
 304       if (glarray->Type == GL_INT_2_10_10_10_REV) {
 305          assert(size == 4);
 306          if (brw->gen >= 8 || brw->is_haswell) {
 307             return glarray->Format == GL_BGRA
 308                ? BRW_SURFACEFORMAT_B10G10R10A2_SSCALED
 309                : BRW_SURFACEFORMAT_R10G10B10A2_SSCALED;
 310          }
 311          return BRW_SURFACEFORMAT_R10G10B10A2_UINT;
 312       } else if (glarray->Type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 313          assert(size == 4);
 314          if (brw->gen >= 8 || brw->is_haswell) {
 315             return glarray->Format == GL_BGRA
 316                ? BRW_SURFACEFORMAT_B10G10R10A2_USCALED
 317                : BRW_SURFACEFORMAT_R10G10B10A2_USCALED;
 318          }
 319          return BRW_SURFACEFORMAT_R10G10B10A2_UINT;
 320       }
 321       assert(glarray->Format == GL_RGBA); /* sanity check */
 322       switch (glarray->Type) {
 323       case GL_DOUBLE: return double_types[size];
 324       case GL_FLOAT: return float_types[size];
 325       case GL_HALF_FLOAT: return half_float_types[size];
 326       case GL_INT: return int_types_scale[size];
 327       case GL_SHORT: return short_types_scale[size];
 328       case GL_BYTE: return byte_types_scale[size];
 329       case GL_UNSIGNED_INT: return uint_types_scale[size];
 330       case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
 331       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
 332       case GL_FIXED:
 333          if (brw->gen >= 8 || brw->is_haswell)
 334             return fixed_point_types[size];
 335
 336          /* This produces GL_FIXED inputs as values between INT32_MIN and
 337           * INT32_MAX, which will be scaled down by 1/65536 by the VS.
 338           */
 339          return int_types_scale[size];
 340       default: assert(0); return 0;
 341       }
 342    }
 343 }
 344
 345 static GLuint get_index_type(GLenum type)
 346 {
 347    switch (type) {
 348    case GL_UNSIGNED_BYTE:  return BRW_INDEX_BYTE;
 349    case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
 350    case GL_UNSIGNED_INT:   return BRW_INDEX_DWORD;
 351    default: assert(0); return 0;
 352    }
 353 }
 354
 355 static void
 356 copy_array_to_vbo_array(struct brw_context *brw,
 357                         struct brw_vertex_element *element,
 358                         int min, int max,
 359                         struct brw_vertex_buffer *buffer,
 360                         GLuint dst_stride)
 361 {
 362    const int src_stride = element->glarray->StrideB;
 363
 364    /* If the source stride is zero, we just want to upload the current
 365     * attribute once and set the buffer's stride to 0.  There's no need
 366     * to replicate it out.
 367     */
 368    if (src_stride == 0) {
 369       intel_upload_data(brw, element->glarray->Ptr,
 370                         element->glarray->_ElementSize,
 371                         element->glarray->_ElementSize,
 372                         &buffer->bo, &buffer->offset);
 373
 374       buffer->stride = 0;
 375       return;
 376    }
 377
 378    const unsigned char *src = element->glarray->Ptr + min * src_stride;
 379    int count = max - min + 1;
 380    GLuint size = count * dst_stride;
 381
 382    if (dst_stride == src_stride) {
 383       intel_upload_data(brw, src, size, dst_stride,
 384                         &buffer->bo, &buffer->offset);
 385    } else {
 386       char * const map = intel_upload_map(brw, size, dst_stride);
 387       char *dst = map;
 388
 389       while (count--) {
 390          memcpy(dst, src, dst_stride);
 391          src += src_stride;
 392          dst += dst_stride;
 393       }
 394       intel_upload_unmap(brw, map, size, dst_stride,
 395                          &buffer->bo, &buffer->offset);
 396    }
 397    buffer->stride = dst_stride;
 398 }
 399
 400 static void brw_prepare_vertices(struct brw_context *brw)
 401 {
 402    struct gl_context *ctx = &brw->ctx;
 403    /* CACHE_NEW_VS_PROG */
 404    GLbitfield64 vs_inputs = brw->vs.prog_data->inputs_read;
 405    const unsigned char *ptr = NULL;
 406    GLuint interleaved = 0;
 407    unsigned int min_index = brw->vb.min_index + brw->basevertex;
 408    unsigned int max_index = brw->vb.max_index + brw->basevertex;
 409    int delta, i, j;
 410
 411    struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
 412    GLuint nr_uploads = 0;
 413
 414    /* _NEW_POLYGON
 415     *
 416     * On gen6+, edge flags don't end up in the VUE (either in or out of the
 417     * VS).  Instead, they're uploaded as the last vertex element, and the data
 418     * is passed sideband through the fixed function units.  So, we need to
 419     * prepare the vertex buffer for it, but it's not present in inputs_read.
 420     */
 421    if (brw->gen >= 6 && (ctx->Polygon.FrontMode != GL_FILL ||
 422                            ctx->Polygon.BackMode != GL_FILL)) {
 423       vs_inputs |= VERT_BIT_EDGEFLAG;
 424    }
 425
 426    if (0)
 427       printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
 428
 429    /* Accumulate the list of enabled arrays. */
 430    brw->vb.nr_enabled = 0;
 431    while (vs_inputs) {
 432       GLuint i = ffsll(vs_inputs) - 1;
 433       struct brw_vertex_element *input = &brw->vb.inputs[i];
 434
 435       vs_inputs &= ~BITFIELD64_BIT(i);
 436       brw->vb.enabled[brw->vb.nr_enabled++] = input;
 437    }
 438
 439    if (brw->vb.nr_enabled == 0)
 440       return;
 441
 442    if (brw->vb.nr_buffers)
 443       return;
 444
 445    for (i = j = 0; i < brw->vb.nr_enabled; i++) {
 446       struct brw_vertex_element *input = brw->vb.enabled[i];
 447       const struct gl_client_array *glarray = input->glarray;
 448
 449       if (_mesa_is_bufferobj(glarray->BufferObj)) {
 450          struct intel_buffer_object *intel_buffer =
 451             intel_buffer_object(glarray->BufferObj);
 452          int k;
 453
 454          /* If we have a VB set to be uploaded for this buffer object
 455           * already, reuse that VB state so that we emit fewer
 456           * relocations.
 457           */
 458          for (k = 0; k < i; k++) {
 459             const struct gl_client_array *other = brw->vb.enabled[k]->glarray;
 460             if (glarray->BufferObj == other->BufferObj &&
 461                 glarray->StrideB == other->StrideB &&
 462                 glarray->InstanceDivisor == other->InstanceDivisor &&
 463                 (uintptr_t)(glarray->Ptr - other->Ptr) < glarray->StrideB)
 464             {
 465                input->buffer = brw->vb.enabled[k]->buffer;
 466                input->offset = glarray->Ptr - other->Ptr;
 467                break;
 468             }
 469          }
 470          if (k == i) {
 471             struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
 472
 473             /* Named buffer object: Just reference its contents directly. */
 474             buffer->bo = intel_bufferobj_source(brw,
 475                                                 intel_buffer, 1,
 476                                                 &buffer->offset);
 477             drm_intel_bo_reference(buffer->bo);
 478             buffer->offset += (uintptr_t)glarray->Ptr;
 479             buffer->stride = glarray->StrideB;
 480             buffer->step_rate = glarray->InstanceDivisor;
 481
 482             input->buffer = j++;
 483             input->offset = 0;
 484          }
 485
 486          /* This is a common place to reach if the user mistakenly supplies
 487           * a pointer in place of a VBO offset.  If we just let it go through,
 488           * we may end up dereferencing a pointer beyond the bounds of the
 489           * GTT.  We would hope that the VBO's max_index would save us, but
 490           * Mesa appears to hand us min/max values not clipped to the
 491           * array object's _MaxElement, and _MaxElement frequently appears
 492           * to be wrong anyway.
 493           *
 494           * The VBO spec allows application termination in this case, and it's
 495           * probably a service to the poor programmer to do so rather than
 496           * trying to just not render.
 497           */
 498          assert(input->offset < brw->vb.buffers[input->buffer].bo->size);
 499       } else {
 500          /* Queue the buffer object up to be uploaded in the next pass,
 501           * when we've decided if we're doing interleaved or not.
 502           */
 503          if (nr_uploads == 0) {
 504             interleaved = glarray->StrideB;
 505             ptr = glarray->Ptr;
 506          }
 507          else if (interleaved != glarray->StrideB ||
 508                   glarray->Ptr < ptr ||
 509                   (uintptr_t)(glarray->Ptr - ptr) + glarray->_ElementSize > interleaved)
 510          {
 511             /* If our stride is different from the first attribute's stride,
 512              * or if the first attribute's stride didn't cover our element,
 513              * disable the interleaved upload optimization.  The second case
 514              * can most commonly occur in cases where there is a single vertex
 515              * and, for example, the data is stored on the application's
 516              * stack.
 517              *
 518              * NOTE: This will also disable the optimization in cases where
 519              * the data is in a different order than the array indices.
 520              * Something like:
 521              *
 522              *     float data[...];
 523              *     glVertexAttribPointer(0, 4, GL_FLOAT, 32, &data[4]);
 524              *     glVertexAttribPointer(1, 4, GL_FLOAT, 32, &data[0]);
 525              */
 526             interleaved = 0;
 527          }
 528
 529          upload[nr_uploads++] = input;
 530       }
 531    }
 532
 533    /* If we need to upload all the arrays, then we can trim those arrays to
 534     * only the used elements [min_index, max_index] so long as we adjust all
 535     * the values used in the 3DPRIMITIVE i.e. by setting the vertex bias.
 536     */
 537    brw->vb.start_vertex_bias = 0;
 538    delta = min_index;
 539    if (nr_uploads == brw->vb.nr_enabled) {
 540       brw->vb.start_vertex_bias = -delta;
 541       delta = 0;
 542    }
 543
 544    /* Handle any arrays to be uploaded. */
 545    if (nr_uploads > 1) {
 546       if (interleaved) {
 547          struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
 548          /* All uploads are interleaved, so upload the arrays together as
 549           * interleaved.  First, upload the contents and set up upload[0].
 550           */
 551          copy_array_to_vbo_array(brw, upload[0], min_index, max_index,
 552                                  buffer, interleaved);
 553          buffer->offset -= delta * interleaved;
 554
 555          for (i = 0; i < nr_uploads; i++) {
 556             /* Then, just point upload[i] at upload[0]'s buffer. */
 557             upload[i]->offset =
 558                ((const unsigned char *)upload[i]->glarray->Ptr - ptr);
 559             upload[i]->buffer = j;
 560          }
 561          j++;
 562
 563          nr_uploads = 0;
 564       }
 565    }
 566    /* Upload non-interleaved arrays */
 567    for (i = 0; i < nr_uploads; i++) {
 568       struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
 569       if (upload[i]->glarray->InstanceDivisor == 0) {
 570          copy_array_to_vbo_array(brw, upload[i], min_index, max_index,
 571                                  buffer, upload[i]->glarray->_ElementSize);
 572       } else {
 573          /* This is an instanced attribute, since its InstanceDivisor
 574           * is not zero. Therefore, its data will be stepped after the
 575           * instanced draw has been run InstanceDivisor times.
 576           */
 577          uint32_t instanced_attr_max_index =
 578             (brw->num_instances - 1) / upload[i]->glarray->InstanceDivisor;
 579          copy_array_to_vbo_array(brw, upload[i], 0, instanced_attr_max_index,
 580                                  buffer, upload[i]->glarray->_ElementSize);
 581       }
 582       buffer->offset -= delta * buffer->stride;
 583       buffer->step_rate = upload[i]->glarray->InstanceDivisor;
 584       upload[i]->buffer = j++;
 585       upload[i]->offset = 0;
 586    }
 587
 588    brw->vb.nr_buffers = j;
 589 }
 590
 591 static void brw_emit_vertices(struct brw_context *brw)
 592 {
 593    GLuint i, nr_elements;
 594
 595    brw_prepare_vertices(brw);
 596
 597    brw_emit_query_begin(brw);
 598
 599    nr_elements = brw->vb.nr_enabled + brw->vs.prog_data->uses_vertexid;
 600
 601    /* If the VS doesn't read any inputs (calculating vertex position from
 602     * a state variable for some reason, for example), emit a single pad
 603     * VERTEX_ELEMENT struct and bail.
 604     *
 605     * The stale VB state stays in place, but they don't do anything unless
 606     * a VE loads from them.
 607     */
 608    if (nr_elements == 0) {
 609       BEGIN_BATCH(3);
 610       OUT_BATCH((_3DSTATE_VERTEX_ELEMENTS << 16) | 1);
 611       if (brw->gen >= 6) {
 612          OUT_BATCH((0 << GEN6_VE0_INDEX_SHIFT) |
 613                    GEN6_VE0_VALID |
 614                    (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
 615                    (0 << BRW_VE0_SRC_OFFSET_SHIFT));
 616       } else {
 617          OUT_BATCH((0 << BRW_VE0_INDEX_SHIFT) |
 618                    BRW_VE0_VALID |
 619                    (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
 620                    (0 << BRW_VE0_SRC_OFFSET_SHIFT));
 621       }
 622       OUT_BATCH((BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_0_SHIFT) |
 623                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_1_SHIFT) |
 624                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
 625                 (BRW_VE1_COMPONENT_STORE_1_FLT << BRW_VE1_COMPONENT_3_SHIFT));
 626       CACHED_BATCH();
 627       return;
 628    }
 629
 630    /* Now emit VB and VEP state packets.
 631     */
 632
 633    if (brw->vb.nr_buffers) {
 634       if (brw->gen >= 6) {
 635          assert(brw->vb.nr_buffers <= 33);
 636       } else {
 637          assert(brw->vb.nr_buffers <= 17);
 638       }
 639
 640       BEGIN_BATCH(1 + 4*brw->vb.nr_buffers);
 641       OUT_BATCH((_3DSTATE_VERTEX_BUFFERS << 16) | (4*brw->vb.nr_buffers - 1));
 642       for (i = 0; i < brw->vb.nr_buffers; i++) {
 643          struct brw_vertex_buffer *buffer = &brw->vb.buffers[i];
 644          uint32_t dw0;
 645
 646          if (brw->gen >= 6) {
 647             dw0 = buffer->step_rate
 648                      ? GEN6_VB0_ACCESS_INSTANCEDATA
 649                      : GEN6_VB0_ACCESS_VERTEXDATA;
 650             dw0 |= i << GEN6_VB0_INDEX_SHIFT;
 651          } else {
 652             dw0 = buffer->step_rate
 653                      ? BRW_VB0_ACCESS_INSTANCEDATA
 654                      : BRW_VB0_ACCESS_VERTEXDATA;
 655             dw0 |= i << BRW_VB0_INDEX_SHIFT;
 656          }
 657
 658          if (brw->gen >= 7)
 659             dw0 |= GEN7_VB0_ADDRESS_MODIFYENABLE;
 660
 661          if (brw->is_haswell)
 662             dw0 |= GEN7_MOCS_L3 << 16;
 663
 664          OUT_BATCH(dw0 | (buffer->stride << BRW_VB0_PITCH_SHIFT));
 665          OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->offset);
 666          if (brw->gen >= 5) {
 667             OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->bo->size - 1);
 668          } else
 669             OUT_BATCH(0);
 670          OUT_BATCH(buffer->step_rate);
 671       }
 672       ADVANCE_BATCH();
 673    }
 674
 675    /* The hardware allows one more VERTEX_ELEMENTS than VERTEX_BUFFERS, presumably
 676     * for VertexID/InstanceID.
 677     */
 678    if (brw->gen >= 6) {
 679       assert(nr_elements <= 34);
 680    } else {
 681       assert(nr_elements <= 18);
 682    }
 683
 684    struct brw_vertex_element *gen6_edgeflag_input = NULL;
 685
 686    BEGIN_BATCH(1 + nr_elements * 2);
 687    OUT_BATCH((_3DSTATE_VERTEX_ELEMENTS << 16) | (2 * nr_elements - 1));
 688    for (i = 0; i < brw->vb.nr_enabled; i++) {
 689       struct brw_vertex_element *input = brw->vb.enabled[i];
 690       uint32_t format = get_surface_type(brw, input->glarray);
 691       uint32_t comp0 = BRW_VE1_COMPONENT_STORE_SRC;
 692       uint32_t comp1 = BRW_VE1_COMPONENT_STORE_SRC;
 693       uint32_t comp2 = BRW_VE1_COMPONENT_STORE_SRC;
 694       uint32_t comp3 = BRW_VE1_COMPONENT_STORE_SRC;
 695
 696       /* The gen4 driver expects edgeflag to come in as a float, and passes
 697        * that float on to the tests in the clipper.  Mesa's current vertex
 698        * attribute value for EdgeFlag is stored as a float, which works out.
 699        * glEdgeFlagPointer, on the other hand, gives us an unnormalized
 700        * integer ubyte.  Just rewrite that to convert to a float.
 701        */
 702       if (input->attrib == VERT_ATTRIB_EDGEFLAG) {
 703          /* Gen6+ passes edgeflag as sideband along with the vertex, instead
 704           * of in the VUE.  We have to upload it sideband as the last vertex
 705           * element according to the B-Spec.
 706           */
 707          if (brw->gen >= 6) {
 708             gen6_edgeflag_input = input;
 709             continue;
 710          }
 711
 712          if (format == BRW_SURFACEFORMAT_R8_UINT)
 713             format = BRW_SURFACEFORMAT_R8_SSCALED;
 714       }
 715
 716       switch (input->glarray->Size) {
 717       case 0: comp0 = BRW_VE1_COMPONENT_STORE_0;
 718       case 1: comp1 = BRW_VE1_COMPONENT_STORE_0;
 719       case 2: comp2 = BRW_VE1_COMPONENT_STORE_0;
 720       case 3: comp3 = input->glarray->Integer ? BRW_VE1_COMPONENT_STORE_1_INT
 721                                               : BRW_VE1_COMPONENT_STORE_1_FLT;
 722          break;
 723       }
 724
 725       if (brw->gen >= 6) {
 726          OUT_BATCH((input->buffer << GEN6_VE0_INDEX_SHIFT) |
 727                    GEN6_VE0_VALID |
 728                    (format << BRW_VE0_FORMAT_SHIFT) |
 729                    (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
 730       } else {
 731          OUT_BATCH((input->buffer << BRW_VE0_INDEX_SHIFT) |
 732                    BRW_VE0_VALID |
 733                    (format << BRW_VE0_FORMAT_SHIFT) |
 734                    (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
 735       }
 736
 737       if (brw->gen >= 5)
 738           OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
 739                     (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
 740                     (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
 741                     (comp3 << BRW_VE1_COMPONENT_3_SHIFT));
 742       else
 743           OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
 744                     (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
 745                     (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
 746                     (comp3 << BRW_VE1_COMPONENT_3_SHIFT) |
 747                     ((i * 4) << BRW_VE1_DST_OFFSET_SHIFT));
 748    }
 749
 750    if (brw->gen >= 6 && gen6_edgeflag_input) {
 751       uint32_t format = get_surface_type(brw, gen6_edgeflag_input->glarray);
 752
 753       OUT_BATCH((gen6_edgeflag_input->buffer << GEN6_VE0_INDEX_SHIFT) |
 754                 GEN6_VE0_VALID |
 755                 GEN6_VE0_EDGE_FLAG_ENABLE |
 756                 (format << BRW_VE0_FORMAT_SHIFT) |
 757                 (gen6_edgeflag_input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
 758       OUT_BATCH((BRW_VE1_COMPONENT_STORE_SRC << BRW_VE1_COMPONENT_0_SHIFT) |
 759                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_1_SHIFT) |
 760                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
 761                 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_3_SHIFT));
 762    }
 763
 764    if (brw->vs.prog_data->uses_vertexid) {
 765       uint32_t dw0 = 0, dw1 = 0;
 766
 767       dw1 = ((BRW_VE1_COMPONENT_STORE_VID << BRW_VE1_COMPONENT_0_SHIFT) |
 768              (BRW_VE1_COMPONENT_STORE_IID << BRW_VE1_COMPONENT_1_SHIFT) |
 769              (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
 770              (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_3_SHIFT));
 771
 772       if (brw->gen >= 6) {
 773          dw0 |= GEN6_VE0_VALID;
 774       } else {
 775          dw0 |= BRW_VE0_VALID;
 776          dw1 |= (i * 4) << BRW_VE1_DST_OFFSET_SHIFT;
 777       }
 778
 779       /* Note that for gl_VertexID, gl_InstanceID, and gl_PrimitiveID values,
 780        * the format is ignored and the value is always int.
 781        */
 782
 783       OUT_BATCH(dw0);
 784       OUT_BATCH(dw1);
 785    }
 786
 787    CACHED_BATCH();
 788 }
 789
 790 const struct brw_tracked_state brw_vertices = {
 791    .dirty = {
 792       .mesa = _NEW_POLYGON,
 793       .brw = BRW_NEW_BATCH | BRW_NEW_VERTICES,
 794       .cache = CACHE_NEW_VS_PROG,
 795    },
 796    .emit = brw_emit_vertices,
 797 };
 798
 799 static void brw_upload_indices(struct brw_context *brw)
 800 {
 801    struct gl_context *ctx = &brw->ctx;
 802    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 803    GLuint ib_size;
 804    drm_intel_bo *bo = NULL;
 805    struct gl_buffer_object *bufferobj;
 806    GLuint offset;
 807    GLuint ib_type_size;
 808
 809    if (index_buffer == NULL)
 810       return;
 811
 812    ib_type_size = _mesa_sizeof_type(index_buffer->type);
 813    ib_size = ib_type_size * index_buffer->count;
 814    bufferobj = index_buffer->obj;
 815
 816    /* Turn into a proper VBO:
 817     */
 818    if (!_mesa_is_bufferobj(bufferobj)) {
 819
 820       /* Get new bufferobj, offset:
 821        */
 822       intel_upload_data(brw, index_buffer->ptr, ib_size, ib_type_size,
 823                         &bo, &offset);
 824       brw->ib.start_vertex_offset = offset / ib_type_size;
 825    } else {
 826       offset = (GLuint) (unsigned long) index_buffer->ptr;
 827
 828       /* If the index buffer isn't aligned to its element size, we have to
 829        * rebase it into a temporary.
 830        */
 831        if ((ib_type_size - 1) & offset) {
 832           perf_debug("copying index buffer to a temporary to work around "
 833                      "misaligned offset %d\n", offset);
 834
 835           GLubyte *map = ctx->Driver.MapBufferRange(ctx,
 836                                                     offset,
 837                                                     ib_size,
 838                                                     GL_MAP_READ_BIT,
 839                                                     bufferobj);
 840
 841           intel_upload_data(brw, map, ib_size, ib_type_size, &bo, &offset);
 842           brw->ib.start_vertex_offset = offset / ib_type_size;
 843
 844           ctx->Driver.UnmapBuffer(ctx, bufferobj);
 845        } else {
 846           /* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading
 847            * the index buffer state when we're just moving the start index
 848            * of our drawing.
 849            */
 850           brw->ib.start_vertex_offset = offset / ib_type_size;
 851
 852           bo = intel_bufferobj_source(brw,
 853                                       intel_buffer_object(bufferobj),
 854                                       ib_type_size,
 855                                       &offset);
 856           drm_intel_bo_reference(bo);
 857
 858           brw->ib.start_vertex_offset += offset / ib_type_size;
 859        }
 860    }
 861
 862    if (brw->ib.bo != bo) {
 863       drm_intel_bo_unreference(brw->ib.bo);
 864       brw->ib.bo = bo;
 865
 866       brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
 867    } else {
 868       drm_intel_bo_unreference(bo);
 869    }
 870
 871    if (index_buffer->type != brw->ib.type) {
 872       brw->ib.type = index_buffer->type;
 873       brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
 874    }
 875 }
 876
 877 const struct brw_tracked_state brw_indices = {
 878    .dirty = {
 879       .mesa = 0,
 880       .brw = BRW_NEW_INDICES,
 881       .cache = 0,
 882    },
 883    .emit = brw_upload_indices,
 884 };
 885
 886 static void brw_emit_index_buffer(struct brw_context *brw)
 887 {
 888    const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
 889    GLuint cut_index_setting;
 890
 891    if (index_buffer == NULL)
 892       return;
 893
 894    if (brw->prim_restart.enable_cut_index && !brw->is_haswell) {
 895       cut_index_setting = BRW_CUT_INDEX_ENABLE;
 896    } else {
 897       cut_index_setting = 0;
 898    }
 899
 900    BEGIN_BATCH(3);
 901    OUT_BATCH(CMD_INDEX_BUFFER << 16 |
 902              cut_index_setting |
 903              get_index_type(index_buffer->type) << 8 |
 904              1);
 905    OUT_RELOC(brw->ib.bo,
 906              I915_GEM_DOMAIN_VERTEX, 0,
 907              0);
 908    OUT_RELOC(brw->ib.bo,
 909              I915_GEM_DOMAIN_VERTEX, 0,
 910              brw->ib.bo->size - 1);
 911    ADVANCE_BATCH();
 912 }
 913
 914 const struct brw_tracked_state brw_index_buffer = {
 915    .dirty = {
 916       .mesa = 0,
 917       .brw = BRW_NEW_BATCH | BRW_NEW_INDEX_BUFFER,
 918       .cache = 0,
 919    },
 920    .emit = brw_emit_index_buffer,
 921 };