src/mesa/drivers/dri/intel/intel_mipmap_tree.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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 "intel_batchbuffer.h"
  29 #include "intel_context.h"
  30 #include "intel_mipmap_tree.h"
  31 #include "intel_regions.h"
  32 #include "intel_resolve_map.h"
  33 #include "intel_span.h"
  34 #include "intel_tex_layout.h"
  35 #include "intel_tex.h"
  36 #include "intel_blit.h"
  37
  38 #include "main/enums.h"
  39 #include "main/formats.h"
  40 #include "main/image.h"
  41 #include "main/teximage.h"
  42
  43 #define FILE_DEBUG_FLAG DEBUG_MIPTREE
  44
  45 static GLenum
  46 target_to_target(GLenum target)
  47 {
  48    switch (target) {
  49    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
  50    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
  51    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
  52    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
  53    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
  54    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
  55       return GL_TEXTURE_CUBE_MAP_ARB;
  56    default:
  57       return target;
  58    }
  59 }
  60
  61 static struct intel_mipmap_tree *
  62 intel_miptree_create_internal(struct intel_context *intel,
  63                               GLenum target,
  64                               gl_format format,
  65                               GLuint first_level,
  66                               GLuint last_level,
  67                               GLuint width0,
  68                               GLuint height0,
  69                               GLuint depth0)
  70 {
  71    struct intel_mipmap_tree *mt = calloc(sizeof(*mt), 1);
  72    int compress_byte = 0;
  73
  74    DBG("%s target %s format %s level %d..%d <-- %p\n", __FUNCTION__,
  75        _mesa_lookup_enum_by_nr(target),
  76        _mesa_get_format_name(format),
  77        first_level, last_level, mt);
  78
  79    if (_mesa_is_format_compressed(format))
  80       compress_byte = intel_compressed_num_bytes(format);
  81
  82    mt->target = target_to_target(target);
  83    mt->format = format;
  84    mt->first_level = first_level;
  85    mt->last_level = last_level;
  86    mt->width0 = width0;
  87    mt->height0 = height0;
  88    mt->cpp = compress_byte ? compress_byte : _mesa_get_format_bytes(mt->format);
  89    mt->compressed = compress_byte ? 1 : 0;
  90    mt->refcount = 1;
  91
  92    if (target == GL_TEXTURE_CUBE_MAP) {
  93       assert(depth0 == 1);
  94       mt->depth0 = 6;
  95    } else {
  96       mt->depth0 = depth0;
  97    }
  98
  99    if (format == MESA_FORMAT_S8) {
 100       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 101        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 102        *    The pitch must be set to 2x the value computed based on width, as
 103        *    the stencil buffer is stored with two rows interleaved.
 104        */
 105       assert(intel->has_separate_stencil);
 106       mt->cpp = 2;
 107    }
 108
 109    if (_mesa_is_depthstencil_format(_mesa_get_format_base_format(format)) &&
 110        (intel->must_use_separate_stencil ||
 111         (intel->has_separate_stencil &&
 112          intel->vtbl.is_hiz_depth_format(intel, format)))) {
 113       mt->stencil_mt = intel_miptree_create(intel,
 114                                             mt->target,
 115                                             MESA_FORMAT_S8,
 116                                             mt->first_level,
 117                                             mt->last_level,
 118                                             mt->width0,
 119                                             mt->height0,
 120                                             mt->depth0,
 121                                             true);
 122       if (!mt->stencil_mt) {
 123          intel_miptree_release(&mt);
 124          return NULL;
 125       }
 126
 127       /* Fix up the Z miptree format for how we're splitting out separate
 128        * stencil.  Gen7 expects there to be no stencil bits in its depth buffer.
 129        */
 130       if (mt->format == MESA_FORMAT_S8_Z24) {
 131          mt->format = MESA_FORMAT_X8_Z24;
 132       } else if (mt->format == MESA_FORMAT_Z32_FLOAT_X24S8) {
 133          mt->format = MESA_FORMAT_Z32_FLOAT;
 134          mt->cpp = 4;
 135       } else {
 136          _mesa_problem(NULL, "Unknown format %s in separate stencil mt\n",
 137                        _mesa_get_format_name(mt->format));
 138       }
 139    }
 140
 141    intel_get_texture_alignment_unit(intel, mt->format,
 142                                     &mt->align_w, &mt->align_h);
 143
 144 #ifdef I915
 145    (void) intel;
 146    if (intel->is_945)
 147       i945_miptree_layout(mt);
 148    else
 149       i915_miptree_layout(mt);
 150 #else
 151    brw_miptree_layout(intel, mt);
 152 #endif
 153
 154    return mt;
 155 }
 156
 157
 158 struct intel_mipmap_tree *
 159 intel_miptree_create(struct intel_context *intel,
 160                      GLenum target,
 161                      gl_format format,
 162                      GLuint first_level,
 163                      GLuint last_level,
 164                      GLuint width0,
 165                      GLuint height0,
 166                      GLuint depth0,
 167                      bool expect_accelerated_upload)
 168 {
 169    struct intel_mipmap_tree *mt;
 170    uint32_t tiling = I915_TILING_NONE;
 171    GLenum base_format = _mesa_get_format_base_format(format);
 172
 173    if (intel->use_texture_tiling && !_mesa_is_format_compressed(format)) {
 174       if (intel->gen >= 4 &&
 175           (base_format == GL_DEPTH_COMPONENT ||
 176            base_format == GL_DEPTH_STENCIL_EXT))
 177          tiling = I915_TILING_Y;
 178       else if (width0 >= 64)
 179          tiling = I915_TILING_X;
 180    }
 181
 182    if (format == MESA_FORMAT_S8) {
 183       /* The stencil buffer is W tiled. However, we request from the kernel a
 184        * non-tiled buffer because the GTT is incapable of W fencing.
 185        *
 186        * The stencil buffer has quirky pitch requirements.  From Vol 2a,
 187        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 188        *    The pitch must be set to 2x the value computed based on width, as
 189        *    the stencil buffer is stored with two rows interleaved.
 190        * To accomplish this, we resort to the nasty hack of doubling the drm
 191        * region's cpp and halving its height.
 192        *
 193        * If we neglect to double the pitch, then render corruption occurs.
 194        */
 195       tiling = I915_TILING_NONE;
 196       width0 = ALIGN(width0, 64);
 197       height0 = ALIGN((height0 + 1) / 2, 64);
 198    }
 199
 200    mt = intel_miptree_create_internal(intel, target, format,
 201                                       first_level, last_level, width0,
 202                                       height0, depth0);
 203    /*
 204     * pitch == 0 || height == 0  indicates the null texture
 205     */
 206    if (!mt || !mt->total_width || !mt->total_height) {
 207       intel_miptree_release(&mt);
 208       return NULL;
 209    }
 210
 211    mt->region = intel_region_alloc(intel->intelScreen,
 212                                    tiling,
 213                                    mt->cpp,
 214                                    mt->total_width,
 215                                    mt->total_height,
 216                                    expect_accelerated_upload);
 217
 218    if (!mt->region) {
 219        intel_miptree_release(&mt);
 220        return NULL;
 221    }
 222
 223    return mt;
 224 }
 225
 226
 227 struct intel_mipmap_tree *
 228 intel_miptree_create_for_region(struct intel_context *intel,
 229                                 GLenum target,
 230                                 gl_format format,
 231                                 struct intel_region *region)
 232 {
 233    struct intel_mipmap_tree *mt;
 234
 235    mt = intel_miptree_create_internal(intel, target, format,
 236                                       0, 0,
 237                                       region->width, region->height, 1);
 238    if (!mt)
 239       return mt;
 240
 241    intel_region_reference(&mt->region, region);
 242
 243    return mt;
 244 }
 245
 246 struct intel_mipmap_tree*
 247 intel_miptree_create_for_renderbuffer(struct intel_context *intel,
 248                                       gl_format format,
 249                                       uint32_t width,
 250                                       uint32_t height)
 251 {
 252    struct intel_mipmap_tree *mt;
 253
 254    mt = intel_miptree_create(intel, GL_TEXTURE_2D, format, 0, 0,
 255                              width, height, 1, true);
 256
 257    return mt;
 258 }
 259
 260 void
 261 intel_miptree_reference(struct intel_mipmap_tree **dst,
 262                         struct intel_mipmap_tree *src)
 263 {
 264    if (*dst == src)
 265       return;
 266
 267    intel_miptree_release(dst);
 268
 269    if (src) {
 270       src->refcount++;
 271       DBG("%s %p refcount now %d\n", __FUNCTION__, src, src->refcount);
 272    }
 273
 274    *dst = src;
 275 }
 276
 277
 278 void
 279 intel_miptree_release(struct intel_mipmap_tree **mt)
 280 {
 281    if (!*mt)
 282       return;
 283
 284    DBG("%s %p refcount will be %d\n", __FUNCTION__, *mt, (*mt)->refcount - 1);
 285    if (--(*mt)->refcount <= 0) {
 286       GLuint i;
 287
 288       DBG("%s deleting %p\n", __FUNCTION__, *mt);
 289
 290       intel_region_release(&((*mt)->region));
 291       intel_miptree_release(&(*mt)->stencil_mt);
 292       intel_miptree_release(&(*mt)->hiz_mt);
 293       intel_resolve_map_clear(&(*mt)->hiz_map);
 294
 295       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 296          free((*mt)->level[i].slice);
 297       }
 298
 299       free(*mt);
 300    }
 301    *mt = NULL;
 302 }
 303
 304 void
 305 intel_miptree_get_dimensions_for_image(struct gl_texture_image *image,
 306                                        int *width, int *height, int *depth)
 307 {
 308    switch (image->TexObject->Target) {
 309    case GL_TEXTURE_1D_ARRAY:
 310       *width = image->Width;
 311       *height = 1;
 312       *depth = image->Height;
 313       break;
 314    default:
 315       *width = image->Width;
 316       *height = image->Height;
 317       *depth = image->Depth;
 318       break;
 319    }
 320 }
 321
 322 /**
 323  * Can the image be pulled into a unified mipmap tree?  This mirrors
 324  * the completeness test in a lot of ways.
 325  *
 326  * Not sure whether I want to pass gl_texture_image here.
 327  */
 328 bool
 329 intel_miptree_match_image(struct intel_mipmap_tree *mt,
 330                           struct gl_texture_image *image)
 331 {
 332    struct intel_texture_image *intelImage = intel_texture_image(image);
 333    GLuint level = intelImage->base.Base.Level;
 334    int width, height, depth;
 335
 336    if (target_to_target(image->TexObject->Target) != mt->target)
 337       return false;
 338
 339    if (image->TexFormat != mt->format &&
 340        !(image->TexFormat == MESA_FORMAT_S8_Z24 &&
 341          mt->format == MESA_FORMAT_X8_Z24 &&
 342          mt->stencil_mt)) {
 343       return false;
 344    }
 345
 346    intel_miptree_get_dimensions_for_image(image, &width, &height, &depth);
 347
 348    if (mt->target == GL_TEXTURE_CUBE_MAP)
 349       depth = 6;
 350
 351    /* Test image dimensions against the base level image adjusted for
 352     * minification.  This will also catch images not present in the
 353     * tree, changed targets, etc.
 354     */
 355    if (width != mt->level[level].width ||
 356        height != mt->level[level].height ||
 357        depth != mt->level[level].depth)
 358       return false;
 359
 360    return true;
 361 }
 362
 363
 364 void
 365 intel_miptree_set_level_info(struct intel_mipmap_tree *mt,
 366                              GLuint level,
 367                              GLuint x, GLuint y,
 368                              GLuint w, GLuint h, GLuint d)
 369 {
 370    mt->level[level].width = w;
 371    mt->level[level].height = h;
 372    mt->level[level].depth = d;
 373    mt->level[level].level_x = x;
 374    mt->level[level].level_y = y;
 375
 376    DBG("%s level %d size: %d,%d,%d offset %d,%d\n", __FUNCTION__,
 377        level, w, h, d, x, y);
 378
 379    assert(mt->level[level].slice == NULL);
 380
 381    mt->level[level].slice = calloc(d, sizeof(*mt->level[0].slice));
 382    mt->level[level].slice[0].x_offset = mt->level[level].level_x;
 383    mt->level[level].slice[0].y_offset = mt->level[level].level_y;
 384 }
 385
 386
 387 void
 388 intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
 389                                GLuint level, GLuint img,
 390                                GLuint x, GLuint y)
 391 {
 392    if (img == 0 && level == 0)
 393       assert(x == 0 && y == 0);
 394
 395    assert(img < mt->level[level].depth);
 396
 397    mt->level[level].slice[img].x_offset = mt->level[level].level_x + x;
 398    mt->level[level].slice[img].y_offset = mt->level[level].level_y + y;
 399
 400    DBG("%s level %d img %d pos %d,%d\n",
 401        __FUNCTION__, level, img,
 402        mt->level[level].slice[img].x_offset,
 403        mt->level[level].slice[img].y_offset);
 404 }
 405
 406
 407 /**
 408  * For cube map textures, either the \c face parameter can be used, of course,
 409  * or the cube face can be interpreted as a depth layer and the \c layer
 410  * parameter used.
 411  */
 412 void
 413 intel_miptree_get_image_offset(struct intel_mipmap_tree *mt,
 414                                GLuint level, GLuint face, GLuint layer,
 415                                GLuint *x, GLuint *y)
 416 {
 417    int slice;
 418
 419    if (face > 0) {
 420       assert(mt->target == GL_TEXTURE_CUBE_MAP);
 421       assert(face < 6);
 422       assert(layer == 0);
 423       slice = face;
 424    } else {
 425       /* This branch may be taken even if the texture target is a cube map. In
 426        * that case, the caller chose to interpret each cube face as a layer.
 427        */
 428       assert(face == 0);
 429       slice = layer;
 430    }
 431
 432    *x = mt->level[level].slice[slice].x_offset;
 433    *y = mt->level[level].slice[slice].y_offset;
 434 }
 435
 436 static void
 437 intel_miptree_copy_slice(struct intel_context *intel,
 438                          struct intel_mipmap_tree *dst_mt,
 439                          struct intel_mipmap_tree *src_mt,
 440                          int level,
 441                          int face,
 442                          int depth)
 443
 444 {
 445    gl_format format = src_mt->format;
 446    uint32_t width = src_mt->level[level].width;
 447    uint32_t height = src_mt->level[level].height;
 448
 449    assert(depth < src_mt->level[level].depth);
 450
 451    if (dst_mt->compressed) {
 452       height = ALIGN(height, dst_mt->align_h) / dst_mt->align_h;
 453       width = ALIGN(width, dst_mt->align_w);
 454    }
 455
 456    uint32_t dst_x, dst_y, src_x, src_y;
 457    intel_miptree_get_image_offset(dst_mt, level, face, depth,
 458                                   &dst_x, &dst_y);
 459    intel_miptree_get_image_offset(src_mt, level, face, depth,
 460                                   &src_x, &src_y);
 461
 462    DBG("validate blit mt %p %d,%d/%d -> mt %p %d,%d/%d (%dx%d)\n",
 463        src_mt, src_x, src_y, src_mt->region->pitch * src_mt->region->cpp,
 464        dst_mt, dst_x, dst_y, dst_mt->region->pitch * dst_mt->region->cpp,
 465        width, height);
 466
 467    if (!intelEmitCopyBlit(intel,
 468                           dst_mt->region->cpp,
 469                           src_mt->region->pitch, src_mt->region->bo,
 470                           0, src_mt->region->tiling,
 471                           dst_mt->region->pitch, dst_mt->region->bo,
 472                           0, dst_mt->region->tiling,
 473                           src_x, src_y,
 474                           dst_x, dst_y,
 475                           width, height,
 476                           GL_COPY)) {
 477
 478       fallback_debug("miptree validate blit for %s failed\n",
 479                      _mesa_get_format_name(format));
 480       void *dst = intel_region_map(intel, dst_mt->region, GL_MAP_WRITE_BIT);
 481       void *src = intel_region_map(intel, src_mt->region, GL_MAP_READ_BIT);
 482
 483       _mesa_copy_rect(dst,
 484                       dst_mt->cpp,
 485                       dst_mt->region->pitch,
 486                       dst_x, dst_y,
 487                       width, height,
 488                       src, src_mt->region->pitch,
 489                       src_x, src_y);
 490
 491       intel_region_unmap(intel, dst_mt->region);
 492       intel_region_unmap(intel, src_mt->region);
 493    }
 494
 495    if (src_mt->stencil_mt) {
 496       intel_miptree_copy_slice(intel,
 497                                dst_mt->stencil_mt, src_mt->stencil_mt,
 498                                level, face, depth);
 499    }
 500 }
 501
 502 /**
 503  * Copies the image's current data to the given miptree, and associates that
 504  * miptree with the image.
 505  */
 506 void
 507 intel_miptree_copy_teximage(struct intel_context *intel,
 508                             struct intel_texture_image *intelImage,
 509                             struct intel_mipmap_tree *dst_mt)
 510 {
 511    struct intel_mipmap_tree *src_mt = intelImage->mt;
 512    int level = intelImage->base.Base.Level;
 513    int face = intelImage->base.Base.Face;
 514    GLuint depth = intelImage->base.Base.Depth;
 515
 516    for (int slice = 0; slice < depth; slice++) {
 517       intel_miptree_copy_slice(intel, dst_mt, src_mt, level, face, slice);
 518    }
 519
 520    intel_miptree_reference(&intelImage->mt, dst_mt);
 521 }
 522
 523 bool
 524 intel_miptree_alloc_hiz(struct intel_context *intel,
 525                         struct intel_mipmap_tree *mt)
 526 {
 527    assert(mt->hiz_mt == NULL);
 528    mt->hiz_mt = intel_miptree_create(intel,
 529                                      mt->target,
 530                                      MESA_FORMAT_X8_Z24,
 531                                      mt->first_level,
 532                                      mt->last_level,
 533                                      mt->width0,
 534                                      mt->height0,
 535                                      mt->depth0,
 536                                      true);
 537
 538    if (!mt->hiz_mt)
 539       return false;
 540
 541    /* Mark that all slices need a HiZ resolve. */
 542    struct intel_resolve_map *head = &mt->hiz_map;
 543    for (int level = mt->first_level; level <= mt->last_level; ++level) {
 544       for (int layer = 0; layer < mt->level[level].depth; ++layer) {
 545          head->next = malloc(sizeof(*head->next));
 546          head->next->prev = head;
 547          head->next->next = NULL;
 548          head = head->next;
 549
 550          head->level = level;
 551          head->layer = layer;
 552          head->need = INTEL_NEED_HIZ_RESOLVE;
 553       }
 554    }
 555
 556    return true;
 557 }
 558
 559 void
 560 intel_miptree_slice_set_needs_hiz_resolve(struct intel_mipmap_tree *mt,
 561                                           uint32_t level,
 562                                           uint32_t layer)
 563 {
 564    intel_miptree_check_level_layer(mt, level, layer);
 565
 566    if (!mt->hiz_mt)
 567       return;
 568
 569    intel_resolve_map_set(&mt->hiz_map,
 570                          level, layer, INTEL_NEED_HIZ_RESOLVE);
 571 }
 572
 573
 574 void
 575 intel_miptree_slice_set_needs_depth_resolve(struct intel_mipmap_tree *mt,
 576                                             uint32_t level,
 577                                             uint32_t layer)
 578 {
 579    intel_miptree_check_level_layer(mt, level, layer);
 580
 581    if (!mt->hiz_mt)
 582       return;
 583
 584    intel_resolve_map_set(&mt->hiz_map,
 585                          level, layer, INTEL_NEED_DEPTH_RESOLVE);
 586 }
 587
 588 typedef void (*resolve_func_t)(struct intel_context *intel,
 589                                struct intel_mipmap_tree *mt,
 590                                uint32_t level,
 591                                uint32_t layer);
 592
 593 static bool
 594 intel_miptree_slice_resolve(struct intel_context *intel,
 595                             struct intel_mipmap_tree *mt,
 596                             uint32_t level,
 597                             uint32_t layer,
 598                             enum intel_need_resolve need,
 599                             resolve_func_t func)
 600 {
 601    intel_miptree_check_level_layer(mt, level, layer);
 602
 603    struct intel_resolve_map *item =
 604          intel_resolve_map_get(&mt->hiz_map, level, layer);
 605
 606    if (!item || item->need != need)
 607       return false;
 608
 609    func(intel, mt, level, layer);
 610    intel_resolve_map_remove(item);
 611    return true;
 612 }
 613
 614 bool
 615 intel_miptree_slice_resolve_hiz(struct intel_context *intel,
 616                                 struct intel_mipmap_tree *mt,
 617                                 uint32_t level,
 618                                 uint32_t layer)
 619 {
 620    return intel_miptree_slice_resolve(intel, mt, level, layer,
 621                                       INTEL_NEED_HIZ_RESOLVE,
 622                                       intel->vtbl.resolve_hiz_slice);
 623 }
 624
 625 bool
 626 intel_miptree_slice_resolve_depth(struct intel_context *intel,
 627                                   struct intel_mipmap_tree *mt,
 628                                   uint32_t level,
 629                                   uint32_t layer)
 630 {
 631    return intel_miptree_slice_resolve(intel, mt, level, layer,
 632                                       INTEL_NEED_DEPTH_RESOLVE,
 633                                       intel->vtbl.resolve_depth_slice);
 634 }
 635
 636 static bool
 637 intel_miptree_all_slices_resolve(struct intel_context *intel,
 638                                  struct intel_mipmap_tree *mt,
 639                                  enum intel_need_resolve need,
 640                                  resolve_func_t func)
 641 {
 642    bool did_resolve = false;
 643    struct intel_resolve_map *i;
 644
 645    for (i = mt->hiz_map.next; i; i = i->next) {
 646       if (i->need != need)
 647          continue;
 648       func(intel, mt, i->level, i->layer);
 649       intel_resolve_map_remove(i);
 650       did_resolve = true;
 651    }
 652
 653    return did_resolve;
 654 }
 655
 656 bool
 657 intel_miptree_all_slices_resolve_hiz(struct intel_context *intel,
 658                                      struct intel_mipmap_tree *mt)
 659 {
 660    return intel_miptree_all_slices_resolve(intel, mt,
 661                                            INTEL_NEED_HIZ_RESOLVE,
 662                                            intel->vtbl.resolve_hiz_slice);
 663 }
 664
 665 bool
 666 intel_miptree_all_slices_resolve_depth(struct intel_context *intel,
 667                                        struct intel_mipmap_tree *mt)
 668 {
 669    return intel_miptree_all_slices_resolve(intel, mt,
 670                                            INTEL_NEED_DEPTH_RESOLVE,
 671                                            intel->vtbl.resolve_depth_slice);
 672 }
 673
 674 static void
 675 intel_miptree_map_gtt(struct intel_context *intel,
 676                       struct intel_mipmap_tree *mt,
 677                       struct intel_miptree_map *map,
 678                       unsigned int level, unsigned int slice)
 679 {
 680    unsigned int bw, bh;
 681    void *base;
 682    unsigned int image_x, image_y;
 683    int x = map->x;
 684    int y = map->y;
 685
 686    /* For compressed formats, the stride is the number of bytes per
 687     * row of blocks.  intel_miptree_get_image_offset() already does
 688     * the divide.
 689     */
 690    _mesa_get_format_block_size(mt->format, &bw, &bh);
 691    assert(y % bh == 0);
 692    y /= bh;
 693
 694    base = intel_region_map(intel, mt->region, map->mode);
 695    /* Note that in the case of cube maps, the caller must have passed the slice
 696     * number referencing the face.
 697     */
 698    intel_miptree_get_image_offset(mt, level, 0, slice, &image_x, &image_y);
 699    x += image_x;
 700    y += image_y;
 701
 702    map->stride = mt->region->pitch * mt->cpp;
 703    map->ptr = base + y * map->stride + x * mt->cpp;
 704
 705    DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
 706        map->x, map->y, map->w, map->h,
 707        mt, _mesa_get_format_name(mt->format),
 708        x, y, map->ptr, map->stride);
 709 }
 710
 711 static void
 712 intel_miptree_unmap_gtt(struct intel_context *intel,
 713                         struct intel_mipmap_tree *mt,
 714                         struct intel_miptree_map *map,
 715                         unsigned int level,
 716                         unsigned int slice)
 717 {
 718    intel_region_unmap(intel, mt->region);
 719 }
 720
 721 static void
 722 intel_miptree_map_blit(struct intel_context *intel,
 723                        struct intel_mipmap_tree *mt,
 724                        struct intel_miptree_map *map,
 725                        unsigned int level, unsigned int slice)
 726 {
 727    unsigned int image_x, image_y;
 728    int x = map->x;
 729    int y = map->y;
 730    int ret;
 731
 732    /* The blitter requires the pitch to be aligned to 4. */
 733    map->stride = ALIGN(map->w * mt->region->cpp, 4);
 734
 735    map->bo = drm_intel_bo_alloc(intel->bufmgr, "intel_miptree_map_blit() temp",
 736                                 map->stride * map->h, 4096);
 737    if (!map->bo) {
 738       fprintf(stderr, "Failed to allocate blit temporary\n");
 739       goto fail;
 740    }
 741
 742    intel_miptree_get_image_offset(mt, level, 0, slice, &image_x, &image_y);
 743    x += image_x;
 744    y += image_y;
 745
 746    if (!intelEmitCopyBlit(intel,
 747                           mt->region->cpp,
 748                           mt->region->pitch, mt->region->bo,
 749                           0, mt->region->tiling,
 750                           map->stride / mt->region->cpp, map->bo,
 751                           0, I915_TILING_NONE,
 752                           x, y,
 753                           0, 0,
 754                           map->w, map->h,
 755                           GL_COPY)) {
 756       fprintf(stderr, "Failed to blit\n");
 757       goto fail;
 758    }
 759
 760    intel_batchbuffer_flush(intel);
 761    ret = drm_intel_bo_map(map->bo, (map->mode & GL_MAP_WRITE_BIT) != 0);
 762    if (ret) {
 763       fprintf(stderr, "Failed to map blit temporary\n");
 764       goto fail;
 765    }
 766
 767    map->ptr = map->bo->virtual;
 768
 769    DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
 770        map->x, map->y, map->w, map->h,
 771        mt, _mesa_get_format_name(mt->format),
 772        x, y, map->ptr, map->stride);
 773
 774    return;
 775
 776 fail:
 777    drm_intel_bo_unreference(map->bo);
 778    map->ptr = NULL;
 779    map->stride = 0;
 780 }
 781
 782 static void
 783 intel_miptree_unmap_blit(struct intel_context *intel,
 784                          struct intel_mipmap_tree *mt,
 785                          struct intel_miptree_map *map,
 786                          unsigned int level,
 787                          unsigned int slice)
 788 {
 789    assert(!(map->mode & GL_MAP_WRITE_BIT));
 790
 791    drm_intel_bo_unmap(map->bo);
 792    drm_intel_bo_unreference(map->bo);
 793 }
 794
 795 static void
 796 intel_miptree_map_s8(struct intel_context *intel,
 797                      struct intel_mipmap_tree *mt,
 798                      struct intel_miptree_map *map,
 799                      unsigned int level, unsigned int slice)
 800 {
 801    map->stride = map->w;
 802    map->buffer = map->ptr = malloc(map->stride * map->h);
 803    if (!map->buffer)
 804       return;
 805
 806    /* One of either READ_BIT or WRITE_BIT or both is set.  READ_BIT implies no
 807     * INVALIDATE_RANGE_BIT.  WRITE_BIT needs the original values read in unless
 808     * invalidate is set, since we'll be writing the whole rectangle from our
 809     * temporary buffer back out.
 810     */
 811    if (!(map->mode & GL_MAP_INVALIDATE_RANGE_BIT)) {
 812       uint8_t *untiled_s8_map = map->ptr;
 813       uint8_t *tiled_s8_map = intel_region_map(intel, mt->region,
 814                                                GL_MAP_READ_BIT);
 815       unsigned int image_x, image_y;
 816
 817       intel_miptree_get_image_offset(mt, level, 0, slice, &image_x, &image_y);
 818
 819       for (uint32_t y = 0; y < map->h; y++) {
 820          for (uint32_t x = 0; x < map->w; x++) {
 821             ptrdiff_t offset = intel_offset_S8(mt->region->pitch,
 822                                                x + image_x + map->x,
 823                                                y + image_y + map->y);
 824             untiled_s8_map[y * map->w + x] = tiled_s8_map[offset];
 825          }
 826       }
 827
 828       intel_region_unmap(intel, mt->region);
 829
 830       DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
 831           map->x, map->y, map->w, map->h,
 832           mt, map->x + image_x, map->y + image_y, map->ptr, map->stride);
 833    } else {
 834       DBG("%s: %d,%d %dx%d from mt %p = %p/%d\n", __FUNCTION__,
 835           map->x, map->y, map->w, map->h,
 836           mt, map->ptr, map->stride);
 837    }
 838 }
 839
 840 static void
 841 intel_miptree_unmap_s8(struct intel_context *intel,
 842                        struct intel_mipmap_tree *mt,
 843                        struct intel_miptree_map *map,
 844                        unsigned int level,
 845                        unsigned int slice)
 846 {
 847    if (map->mode & GL_MAP_WRITE_BIT) {
 848       unsigned int image_x, image_y;
 849       uint8_t *untiled_s8_map = map->ptr;
 850       uint8_t *tiled_s8_map = intel_region_map(intel, mt->region, map->mode);
 851
 852       intel_miptree_get_image_offset(mt, level, 0, slice, &image_x, &image_y);
 853
 854       for (uint32_t y = 0; y < map->h; y++) {
 855          for (uint32_t x = 0; x < map->w; x++) {
 856             ptrdiff_t offset = intel_offset_S8(mt->region->pitch,
 857                                                x + map->x,
 858                                                y + map->y);
 859             tiled_s8_map[offset] = untiled_s8_map[y * map->w + x];
 860          }
 861       }
 862
 863       intel_region_unmap(intel, mt->region);
 864    }
 865
 866    free(map->buffer);
 867 }
 868
 869 /**
 870  * Mapping function for packed depth/stencil miptrees backed by real separate
 871  * miptrees for depth and stencil.
 872  *
 873  * On gen7, and to support HiZ pre-gen7, we have to have the stencil buffer
 874  * separate from the depth buffer.  Yet at the GL API level, we have to expose
 875  * packed depth/stencil textures and FBO attachments, and Mesa core expects to
 876  * be able to map that memory for texture storage and glReadPixels-type
 877  * operations.  We give Mesa core that access by mallocing a temporary and
 878  * copying the data between the actual backing store and the temporary.
 879  */
 880 static void
 881 intel_miptree_map_depthstencil(struct intel_context *intel,
 882                                struct intel_mipmap_tree *mt,
 883                                struct intel_miptree_map *map,
 884                                unsigned int level, unsigned int slice)
 885 {
 886    struct intel_mipmap_tree *z_mt = mt;
 887    struct intel_mipmap_tree *s_mt = mt->stencil_mt;
 888    bool map_z32f_x24s8 = mt->format == MESA_FORMAT_Z32_FLOAT;
 889    int packed_bpp = map_z32f_x24s8 ? 8 : 4;
 890
 891    map->stride = map->w * packed_bpp;
 892    map->buffer = map->ptr = malloc(map->stride * map->h);
 893    if (!map->buffer)
 894       return;
 895
 896    /* One of either READ_BIT or WRITE_BIT or both is set.  READ_BIT implies no
 897     * INVALIDATE_RANGE_BIT.  WRITE_BIT needs the original values read in unless
 898     * invalidate is set, since we'll be writing the whole rectangle from our
 899     * temporary buffer back out.
 900     */
 901    if (!(map->mode & GL_MAP_INVALIDATE_RANGE_BIT)) {
 902       uint32_t *packed_map = map->ptr;
 903       uint8_t *s_map = intel_region_map(intel, s_mt->region, GL_MAP_READ_BIT);
 904       uint32_t *z_map = intel_region_map(intel, z_mt->region, GL_MAP_READ_BIT);
 905       unsigned int s_image_x, s_image_y;
 906       unsigned int z_image_x, z_image_y;
 907
 908       intel_miptree_get_image_offset(s_mt, level, 0, slice,
 909                                      &s_image_x, &s_image_y);
 910       intel_miptree_get_image_offset(z_mt, level, 0, slice,
 911                                      &z_image_x, &z_image_y);
 912
 913       for (uint32_t y = 0; y < map->h; y++) {
 914          for (uint32_t x = 0; x < map->w; x++) {
 915             int map_x = map->x + x, map_y = map->y + y;
 916             ptrdiff_t s_offset = intel_offset_S8(s_mt->region->pitch,
 917                                                  map_x + s_image_x,
 918                                                  map_y + s_image_y);
 919             ptrdiff_t z_offset = ((map_y + z_image_y) * z_mt->region->pitch +
 920                                   (map_x + z_image_x));
 921             uint8_t s = s_map[s_offset];
 922             uint32_t z = z_map[z_offset];
 923
 924             if (map_z32f_x24s8) {
 925                packed_map[(y * map->w + x) * 2 + 0] = z;
 926                packed_map[(y * map->w + x) * 2 + 1] = s;
 927             } else {
 928                packed_map[y * map->w + x] = (s << 24) | (z & 0x00ffffff);
 929             }
 930          }
 931       }
 932
 933       intel_region_unmap(intel, s_mt->region);
 934       intel_region_unmap(intel, z_mt->region);
 935
 936       DBG("%s: %d,%d %dx%d from z mt %p %d,%d, s mt %p %d,%d = %p/%d\n",
 937           __FUNCTION__,
 938           map->x, map->y, map->w, map->h,
 939           z_mt, map->x + z_image_x, map->y + z_image_y,
 940           s_mt, map->x + s_image_x, map->y + s_image_y,
 941           map->ptr, map->stride);
 942    } else {
 943       DBG("%s: %d,%d %dx%d from mt %p = %p/%d\n", __FUNCTION__,
 944           map->x, map->y, map->w, map->h,
 945           mt, map->ptr, map->stride);
 946    }
 947 }
 948
 949 static void
 950 intel_miptree_unmap_depthstencil(struct intel_context *intel,
 951                                  struct intel_mipmap_tree *mt,
 952                                  struct intel_miptree_map *map,
 953                                  unsigned int level,
 954                                  unsigned int slice)
 955 {
 956    struct intel_mipmap_tree *z_mt = mt;
 957    struct intel_mipmap_tree *s_mt = mt->stencil_mt;
 958    bool map_z32f_x24s8 = mt->format == MESA_FORMAT_Z32_FLOAT;
 959
 960    if (map->mode & GL_MAP_WRITE_BIT) {
 961       uint32_t *packed_map = map->ptr;
 962       uint8_t *s_map = intel_region_map(intel, s_mt->region, map->mode);
 963       uint32_t *z_map = intel_region_map(intel, z_mt->region, map->mode);
 964       unsigned int s_image_x, s_image_y;
 965       unsigned int z_image_x, z_image_y;
 966
 967       intel_miptree_get_image_offset(s_mt, level, 0, slice,
 968                                      &s_image_x, &s_image_y);
 969       intel_miptree_get_image_offset(z_mt, level, 0, slice,
 970                                      &z_image_x, &z_image_y);
 971
 972       for (uint32_t y = 0; y < map->h; y++) {
 973          for (uint32_t x = 0; x < map->w; x++) {
 974             ptrdiff_t s_offset = intel_offset_S8(s_mt->region->pitch,
 975                                                  x + s_image_x + map->x,
 976                                                  y + s_image_y + map->y);
 977             ptrdiff_t z_offset = ((y + z_image_y) * z_mt->region->pitch +
 978                                   (x + z_image_x));
 979
 980             if (map_z32f_x24s8) {
 981                z_map[z_offset] = packed_map[(y * map->w + x) * 2 + 0];
 982                s_map[s_offset] = packed_map[(y * map->w + x) * 2 + 1];
 983             } else {
 984                uint32_t packed = packed_map[y * map->w + x];
 985                s_map[s_offset] = packed >> 24;
 986                z_map[z_offset] = packed;
 987             }
 988          }
 989       }
 990
 991       intel_region_unmap(intel, s_mt->region);
 992       intel_region_unmap(intel, z_mt->region);
 993
 994       DBG("%s: %d,%d %dx%d from z mt %p (%s) %d,%d, s mt %p %d,%d = %p/%d\n",
 995           __FUNCTION__,
 996           map->x, map->y, map->w, map->h,
 997           z_mt, _mesa_get_format_name(z_mt->format),
 998           map->x + z_image_x, map->y + z_image_y,
 999           s_mt, map->x + s_image_x, map->y + s_image_y,
1000           map->ptr, map->stride);
1001    }
1002
1003    free(map->buffer);
1004 }
1005
1006 void
1007 intel_miptree_map(struct intel_context *intel,
1008                   struct intel_mipmap_tree *mt,
1009                   unsigned int level,
1010                   unsigned int slice,
1011                   unsigned int x,
1012                   unsigned int y,
1013                   unsigned int w,
1014                   unsigned int h,
1015                   GLbitfield mode,
1016                   void **out_ptr,
1017                   int *out_stride)
1018 {
1019    struct intel_miptree_map *map;
1020
1021    map = calloc(1, sizeof(struct intel_miptree_map));
1022    if (!map){
1023       *out_ptr = NULL;
1024       *out_stride = 0;
1025       return;
1026    }
1027
1028    assert(!mt->level[level].slice[slice].map);
1029    mt->level[level].slice[slice].map = map;
1030    map->mode = mode;
1031    map->x = x;
1032    map->y = y;
1033    map->w = w;
1034    map->h = h;
1035
1036    intel_miptree_slice_resolve_depth(intel, mt, level, slice);
1037    if (map->mode & GL_MAP_WRITE_BIT) {
1038       intel_miptree_slice_set_needs_hiz_resolve(mt, level, slice);
1039    }
1040
1041    if (mt->format == MESA_FORMAT_S8) {
1042       intel_miptree_map_s8(intel, mt, map, level, slice);
1043    } else if (mt->stencil_mt) {
1044       intel_miptree_map_depthstencil(intel, mt, map, level, slice);
1045    } else if (intel->gen >= 6 &&
1046               !(mode & GL_MAP_WRITE_BIT) &&
1047               !mt->compressed &&
1048               mt->region->tiling == I915_TILING_X) {
1049       intel_miptree_map_blit(intel, mt, map, level, slice);
1050    } else {
1051       intel_miptree_map_gtt(intel, mt, map, level, slice);
1052    }
1053
1054    *out_ptr = map->ptr;
1055    *out_stride = map->stride;
1056 }
1057
1058 void
1059 intel_miptree_unmap(struct intel_context *intel,
1060                     struct intel_mipmap_tree *mt,
1061                     unsigned int level,
1062                     unsigned int slice)
1063 {
1064    struct intel_miptree_map *map = mt->level[level].slice[slice].map;
1065
1066    if (!map)
1067       return;
1068
1069    DBG("%s: mt %p (%s) level %d slice %d\n", __FUNCTION__,
1070        mt, _mesa_get_format_name(mt->format), level, slice);
1071
1072    if (mt->format == MESA_FORMAT_S8) {
1073       intel_miptree_unmap_s8(intel, mt, map, level, slice);
1074    } else if (mt->stencil_mt) {
1075       intel_miptree_unmap_depthstencil(intel, mt, map, level, slice);
1076    } else if (map->bo) {
1077       intel_miptree_unmap_blit(intel, mt, map, level, slice);
1078    } else {
1079       intel_miptree_unmap_gtt(intel, mt, map, level, slice);
1080    }
1081
1082    mt->level[level].slice[slice].map = NULL;
1083    free(map);
1084 }