src/mesa/drivers/dri/i915/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 <GL/gl.h>
  29 #include <GL/internal/dri_interface.h>
  30
  31 #include "intel_batchbuffer.h"
  32 #include "intel_chipset.h"
  33 #include "intel_context.h"
  34 #include "intel_mipmap_tree.h"
  35 #include "intel_regions.h"
  36 #include "intel_tex_layout.h"
  37 #include "intel_tex.h"
  38 #include "intel_blit.h"
  39
  40 #include "main/enums.h"
  41 #include "main/formats.h"
  42 #include "main/glformats.h"
  43 #include "main/teximage.h"
  44
  45 #define FILE_DEBUG_FLAG DEBUG_MIPTREE
  46
  47 static GLenum
  48 target_to_target(GLenum target)
  49 {
  50    switch (target) {
  51    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
  52    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
  53    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
  54    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
  55    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
  56    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
  57       return GL_TEXTURE_CUBE_MAP_ARB;
  58    default:
  59       return target;
  60    }
  61 }
  62
  63 /**
  64  * @param for_bo Indicates that the caller is
  65  *        intel_miptree_create_for_bo(). If true, then do not create
  66  *        \c stencil_mt.
  67  */
  68 struct intel_mipmap_tree *
  69 intel_miptree_create_layout(struct intel_context *intel,
  70                             GLenum target,
  71                             gl_format format,
  72                             GLuint first_level,
  73                             GLuint last_level,
  74                             GLuint width0,
  75                             GLuint height0,
  76                             GLuint depth0,
  77                             bool for_bo)
  78 {
  79    struct intel_mipmap_tree *mt = calloc(sizeof(*mt), 1);
  80    if (!mt)
  81       return NULL;
  82
  83    DBG("%s target %s format %s level %d..%d <-- %p\n", __FUNCTION__,
  84        _mesa_lookup_enum_by_nr(target),
  85        _mesa_get_format_name(format),
  86        first_level, last_level, mt);
  87
  88    mt->target = target_to_target(target);
  89    mt->format = format;
  90    mt->first_level = first_level;
  91    mt->last_level = last_level;
  92    mt->logical_width0 = width0;
  93    mt->logical_height0 = height0;
  94    mt->logical_depth0 = depth0;
  95
  96    /* The cpp is bytes per (1, blockheight)-sized block for compressed
  97     * textures.  This is why you'll see divides by blockheight all over
  98     */
  99    unsigned bw, bh;
 100    _mesa_get_format_block_size(format, &bw, &bh);
 101    assert(_mesa_get_format_bytes(mt->format) % bw == 0);
 102    mt->cpp = _mesa_get_format_bytes(mt->format) / bw;
 103
 104    mt->compressed = _mesa_is_format_compressed(format);
 105    mt->refcount = 1;
 106
 107    if (target == GL_TEXTURE_CUBE_MAP) {
 108       assert(depth0 == 1);
 109       depth0 = 6;
 110    }
 111
 112    mt->physical_width0 = width0;
 113    mt->physical_height0 = height0;
 114    mt->physical_depth0 = depth0;
 115
 116    intel_get_texture_alignment_unit(intel, mt->format,
 117                                     &mt->align_w, &mt->align_h);
 118
 119    (void) intel;
 120    if (intel->is_945)
 121       i945_miptree_layout(mt);
 122    else
 123       i915_miptree_layout(mt);
 124
 125    return mt;
 126 }
 127
 128 /**
 129  * \brief Helper function for intel_miptree_create().
 130  */
 131 static uint32_t
 132 intel_miptree_choose_tiling(struct intel_context *intel,
 133                             gl_format format,
 134                             uint32_t width0,
 135                             enum intel_miptree_tiling_mode requested,
 136                             struct intel_mipmap_tree *mt)
 137 {
 138    /* Some usages may want only one type of tiling, like depth miptrees (Y
 139     * tiled), or temporary BOs for uploading data once (linear).
 140     */
 141    switch (requested) {
 142    case INTEL_MIPTREE_TILING_ANY:
 143       break;
 144    case INTEL_MIPTREE_TILING_Y:
 145       return I915_TILING_Y;
 146    case INTEL_MIPTREE_TILING_NONE:
 147       return I915_TILING_NONE;
 148    }
 149
 150    int minimum_pitch = mt->total_width * mt->cpp;
 151
 152    /* If the width is much smaller than a tile, don't bother tiling. */
 153    if (minimum_pitch < 64)
 154       return I915_TILING_NONE;
 155
 156    if (ALIGN(minimum_pitch, 512) >= 32768) {
 157       perf_debug("%dx%d miptree too large to blit, falling back to untiled",
 158                  mt->total_width, mt->total_height);
 159       return I915_TILING_NONE;
 160    }
 161
 162    /* We don't have BLORP to handle Y-tiled blits, so use X-tiling. */
 163    return I915_TILING_X;
 164 }
 165
 166 struct intel_mipmap_tree *
 167 intel_miptree_create(struct intel_context *intel,
 168                      GLenum target,
 169                      gl_format format,
 170                      GLuint first_level,
 171                      GLuint last_level,
 172                      GLuint width0,
 173                      GLuint height0,
 174                      GLuint depth0,
 175                      bool expect_accelerated_upload,
 176                      enum intel_miptree_tiling_mode requested_tiling)
 177 {
 178    struct intel_mipmap_tree *mt;
 179    GLuint total_width, total_height;
 180
 181
 182    mt = intel_miptree_create_layout(intel, target, format,
 183                                       first_level, last_level, width0,
 184                                       height0, depth0,
 185                                       false);
 186    /*
 187     * pitch == 0 || height == 0  indicates the null texture
 188     */
 189    if (!mt || !mt->total_width || !mt->total_height) {
 190       intel_miptree_release(&mt);
 191       return NULL;
 192    }
 193
 194    total_width = mt->total_width;
 195    total_height = mt->total_height;
 196
 197    uint32_t tiling = intel_miptree_choose_tiling(intel, format, width0,
 198                                                  requested_tiling,
 199                                                  mt);
 200    bool y_or_x = tiling == (I915_TILING_Y | I915_TILING_X);
 201
 202    mt->region = intel_region_alloc(intel->intelScreen,
 203                                    y_or_x ? I915_TILING_Y : tiling,
 204                                    mt->cpp,
 205                                    total_width,
 206                                    total_height,
 207                                    expect_accelerated_upload);
 208
 209    /* If the region is too large to fit in the aperture, we need to use the
 210     * BLT engine to support it.  The BLT paths can't currently handle Y-tiling,
 211     * so we need to fall back to X.
 212     */
 213    if (y_or_x && mt->region->bo->size >= intel->max_gtt_map_object_size) {
 214       perf_debug("%dx%d miptree larger than aperture; falling back to X-tiled\n",
 215                  mt->total_width, mt->total_height);
 216       intel_region_release(&mt->region);
 217
 218       mt->region = intel_region_alloc(intel->intelScreen,
 219                                       I915_TILING_X,
 220                                       mt->cpp,
 221                                       total_width,
 222                                       total_height,
 223                                       expect_accelerated_upload);
 224    }
 225
 226    mt->offset = 0;
 227
 228    if (!mt->region) {
 229        intel_miptree_release(&mt);
 230        return NULL;
 231    }
 232
 233    return mt;
 234 }
 235
 236 struct intel_mipmap_tree *
 237 intel_miptree_create_for_bo(struct intel_context *intel,
 238                             drm_intel_bo *bo,
 239                             gl_format format,
 240                             uint32_t offset,
 241                             uint32_t width,
 242                             uint32_t height,
 243                             int pitch,
 244                             uint32_t tiling)
 245 {
 246    struct intel_mipmap_tree *mt;
 247
 248    struct intel_region *region = calloc(1, sizeof(*region));
 249    if (!region)
 250       return NULL;
 251
 252    /* Nothing will be able to use this miptree with the BO if the offset isn't
 253     * aligned.
 254     */
 255    if (tiling != I915_TILING_NONE)
 256       assert(offset % 4096 == 0);
 257
 258    /* miptrees can't handle negative pitch.  If you need flipping of images,
 259     * that's outside of the scope of the mt.
 260     */
 261    assert(pitch >= 0);
 262
 263    mt = intel_miptree_create_layout(intel, GL_TEXTURE_2D, format,
 264                                     0, 0,
 265                                     width, height, 1,
 266                                     true);
 267    if (!mt)
 268       return mt;
 269
 270    region->cpp = mt->cpp;
 271    region->width = width;
 272    region->height = height;
 273    region->pitch = pitch;
 274    region->refcount = 1;
 275    drm_intel_bo_reference(bo);
 276    region->bo = bo;
 277    region->tiling = tiling;
 278
 279    mt->region = region;
 280    mt->offset = offset;
 281
 282    return mt;
 283 }
 284
 285
 286 /**
 287  * For a singlesample DRI2 buffer, this simply wraps the given region with a miptree.
 288  *
 289  * For a multisample DRI2 buffer, this wraps the given region with
 290  * a singlesample miptree, then creates a multisample miptree into which the
 291  * singlesample miptree is embedded as a child.
 292  */
 293 struct intel_mipmap_tree*
 294 intel_miptree_create_for_dri2_buffer(struct intel_context *intel,
 295                                      unsigned dri_attachment,
 296                                      gl_format format,
 297                                      struct intel_region *region)
 298 {
 299    struct intel_mipmap_tree *mt = NULL;
 300
 301    /* Only the front and back buffers, which are color buffers, are shared
 302     * through DRI2.
 303     */
 304    assert(dri_attachment == __DRI_BUFFER_BACK_LEFT ||
 305           dri_attachment == __DRI_BUFFER_FRONT_LEFT ||
 306           dri_attachment == __DRI_BUFFER_FAKE_FRONT_LEFT);
 307    assert(_mesa_get_format_base_format(format) == GL_RGB ||
 308           _mesa_get_format_base_format(format) == GL_RGBA);
 309
 310    mt = intel_miptree_create_for_bo(intel,
 311                                     region->bo,
 312                                     format,
 313                                     0,
 314                                     region->width,
 315                                     region->height,
 316                                     region->pitch,
 317                                     region->tiling);
 318    if (!mt)
 319       return NULL;
 320    mt->region->name = region->name;
 321
 322    return mt;
 323 }
 324
 325 /**
 326  * For a singlesample image buffer, this simply wraps the given region with a miptree.
 327  *
 328  * For a multisample image buffer, this wraps the given region with
 329  * a singlesample miptree, then creates a multisample miptree into which the
 330  * singlesample miptree is embedded as a child.
 331  */
 332 struct intel_mipmap_tree*
 333 intel_miptree_create_for_image_buffer(struct intel_context *intel,
 334                                       enum __DRIimageBufferMask buffer_type,
 335                                       gl_format format,
 336                                       uint32_t num_samples,
 337                                       struct intel_region *region)
 338 {
 339    struct intel_mipmap_tree *mt = NULL;
 340
 341    /* Only the front and back buffers, which are color buffers, are allocated
 342     * through the image loader.
 343     */
 344    assert(_mesa_get_format_base_format(format) == GL_RGB ||
 345           _mesa_get_format_base_format(format) == GL_RGBA);
 346
 347    mt = intel_miptree_create_for_bo(intel,
 348                                     region->bo,
 349                                     format,
 350                                     0,
 351                                     region->width,
 352                                     region->height,
 353                                     region->pitch,
 354                                     region->tiling);
 355    return mt;
 356 }
 357
 358 struct intel_mipmap_tree*
 359 intel_miptree_create_for_renderbuffer(struct intel_context *intel,
 360                                       gl_format format,
 361                                       uint32_t width,
 362                                       uint32_t height)
 363 {
 364    uint32_t depth = 1;
 365
 366    return intel_miptree_create(intel, GL_TEXTURE_2D, format, 0, 0,
 367                                width, height, depth, true,
 368                                INTEL_MIPTREE_TILING_ANY);
 369 }
 370
 371 void
 372 intel_miptree_reference(struct intel_mipmap_tree **dst,
 373                         struct intel_mipmap_tree *src)
 374 {
 375    if (*dst == src)
 376       return;
 377
 378    intel_miptree_release(dst);
 379
 380    if (src) {
 381       src->refcount++;
 382       DBG("%s %p refcount now %d\n", __FUNCTION__, src, src->refcount);
 383    }
 384
 385    *dst = src;
 386 }
 387
 388
 389 void
 390 intel_miptree_release(struct intel_mipmap_tree **mt)
 391 {
 392    if (!*mt)
 393       return;
 394
 395    DBG("%s %p refcount will be %d\n", __FUNCTION__, *mt, (*mt)->refcount - 1);
 396    if (--(*mt)->refcount <= 0) {
 397       GLuint i;
 398
 399       DBG("%s deleting %p\n", __FUNCTION__, *mt);
 400
 401       intel_region_release(&((*mt)->region));
 402
 403       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 404          free((*mt)->level[i].slice);
 405       }
 406
 407       free(*mt);
 408    }
 409    *mt = NULL;
 410 }
 411
 412 void
 413 intel_miptree_get_dimensions_for_image(struct gl_texture_image *image,
 414                                        int *width, int *height, int *depth)
 415 {
 416    switch (image->TexObject->Target) {
 417    case GL_TEXTURE_1D_ARRAY:
 418       *width = image->Width;
 419       *height = 1;
 420       *depth = image->Height;
 421       break;
 422    default:
 423       *width = image->Width;
 424       *height = image->Height;
 425       *depth = image->Depth;
 426       break;
 427    }
 428 }
 429
 430 /**
 431  * Can the image be pulled into a unified mipmap tree?  This mirrors
 432  * the completeness test in a lot of ways.
 433  *
 434  * Not sure whether I want to pass gl_texture_image here.
 435  */
 436 bool
 437 intel_miptree_match_image(struct intel_mipmap_tree *mt,
 438                           struct gl_texture_image *image)
 439 {
 440    struct intel_texture_image *intelImage = intel_texture_image(image);
 441    GLuint level = intelImage->base.Base.Level;
 442    int width, height, depth;
 443
 444    /* glTexImage* choose the texture object based on the target passed in, and
 445     * objects can't change targets over their lifetimes, so this should be
 446     * true.
 447     */
 448    assert(target_to_target(image->TexObject->Target) == mt->target);
 449
 450    gl_format mt_format = mt->format;
 451
 452    if (image->TexFormat != mt_format)
 453       return false;
 454
 455    intel_miptree_get_dimensions_for_image(image, &width, &height, &depth);
 456
 457    if (mt->target == GL_TEXTURE_CUBE_MAP)
 458       depth = 6;
 459
 460    /* Test image dimensions against the base level image adjusted for
 461     * minification.  This will also catch images not present in the
 462     * tree, changed targets, etc.
 463     */
 464    if (mt->target == GL_TEXTURE_2D_MULTISAMPLE ||
 465          mt->target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
 466       /* nonzero level here is always bogus */
 467       assert(level == 0);
 468
 469       if (width != mt->logical_width0 ||
 470             height != mt->logical_height0 ||
 471             depth != mt->logical_depth0) {
 472          return false;
 473       }
 474    }
 475    else {
 476       /* all normal textures, renderbuffers, etc */
 477       if (width != mt->level[level].width ||
 478           height != mt->level[level].height ||
 479           depth != mt->level[level].depth) {
 480          return false;
 481       }
 482    }
 483
 484    return true;
 485 }
 486
 487
 488 void
 489 intel_miptree_set_level_info(struct intel_mipmap_tree *mt,
 490                              GLuint level,
 491                              GLuint x, GLuint y,
 492                              GLuint w, GLuint h, GLuint d)
 493 {
 494    mt->level[level].width = w;
 495    mt->level[level].height = h;
 496    mt->level[level].depth = d;
 497    mt->level[level].level_x = x;
 498    mt->level[level].level_y = y;
 499
 500    DBG("%s level %d size: %d,%d,%d offset %d,%d\n", __FUNCTION__,
 501        level, w, h, d, x, y);
 502
 503    assert(mt->level[level].slice == NULL);
 504
 505    mt->level[level].slice = calloc(d, sizeof(*mt->level[0].slice));
 506    mt->level[level].slice[0].x_offset = mt->level[level].level_x;
 507    mt->level[level].slice[0].y_offset = mt->level[level].level_y;
 508 }
 509
 510
 511 void
 512 intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
 513                                GLuint level, GLuint img,
 514                                GLuint x, GLuint y)
 515 {
 516    if (img == 0 && level == 0)
 517       assert(x == 0 && y == 0);
 518
 519    assert(img < mt->level[level].depth);
 520
 521    mt->level[level].slice[img].x_offset = mt->level[level].level_x + x;
 522    mt->level[level].slice[img].y_offset = mt->level[level].level_y + y;
 523
 524    DBG("%s level %d img %d pos %d,%d\n",
 525        __FUNCTION__, level, img,
 526        mt->level[level].slice[img].x_offset,
 527        mt->level[level].slice[img].y_offset);
 528 }
 529
 530 void
 531 intel_miptree_get_image_offset(struct intel_mipmap_tree *mt,
 532                                GLuint level, GLuint slice,
 533                                GLuint *x, GLuint *y)
 534 {
 535    assert(slice < mt->level[level].depth);
 536
 537    *x = mt->level[level].slice[slice].x_offset;
 538    *y = mt->level[level].slice[slice].y_offset;
 539 }
 540
 541 /**
 542  * Rendering with tiled buffers requires that the base address of the buffer
 543  * be aligned to a page boundary.  For renderbuffers, and sometimes with
 544  * textures, we may want the surface to point at a texture image level that
 545  * isn't at a page boundary.
 546  *
 547  * This function returns an appropriately-aligned base offset
 548  * according to the tiling restrictions, plus any required x/y offset
 549  * from there.
 550  */
 551 uint32_t
 552 intel_miptree_get_tile_offsets(struct intel_mipmap_tree *mt,
 553                                GLuint level, GLuint slice,
 554                                uint32_t *tile_x,
 555                                uint32_t *tile_y)
 556 {
 557    struct intel_region *region = mt->region;
 558    uint32_t x, y;
 559    uint32_t mask_x, mask_y;
 560
 561    intel_region_get_tile_masks(region, &mask_x, &mask_y, false);
 562    intel_miptree_get_image_offset(mt, level, slice, &x, &y);
 563
 564    *tile_x = x & mask_x;
 565    *tile_y = y & mask_y;
 566
 567    return intel_region_get_aligned_offset(region, x & ~mask_x, y & ~mask_y,
 568                                           false);
 569 }
 570
 571 static void
 572 intel_miptree_copy_slice_sw(struct intel_context *intel,
 573                             struct intel_mipmap_tree *dst_mt,
 574                             struct intel_mipmap_tree *src_mt,
 575                             int level,
 576                             int slice,
 577                             int width,
 578                             int height)
 579 {
 580    void *src, *dst;
 581    int src_stride, dst_stride;
 582    int cpp = dst_mt->cpp;
 583
 584    intel_miptree_map(intel, src_mt,
 585                      level, slice,
 586                      0, 0,
 587                      width, height,
 588                      GL_MAP_READ_BIT,
 589                      &src, &src_stride);
 590
 591    intel_miptree_map(intel, dst_mt,
 592                      level, slice,
 593                      0, 0,
 594                      width, height,
 595                      GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT,
 596                      &dst, &dst_stride);
 597
 598    DBG("sw blit %s mt %p %p/%d -> %s mt %p %p/%d (%dx%d)\n",
 599        _mesa_get_format_name(src_mt->format),
 600        src_mt, src, src_stride,
 601        _mesa_get_format_name(dst_mt->format),
 602        dst_mt, dst, dst_stride,
 603        width, height);
 604
 605    int row_size = cpp * width;
 606    if (src_stride == row_size &&
 607        dst_stride == row_size) {
 608       memcpy(dst, src, row_size * height);
 609    } else {
 610       for (int i = 0; i < height; i++) {
 611          memcpy(dst, src, row_size);
 612          dst += dst_stride;
 613          src += src_stride;
 614       }
 615    }
 616
 617    intel_miptree_unmap(intel, dst_mt, level, slice);
 618    intel_miptree_unmap(intel, src_mt, level, slice);
 619 }
 620
 621 static void
 622 intel_miptree_copy_slice(struct intel_context *intel,
 623                          struct intel_mipmap_tree *dst_mt,
 624                          struct intel_mipmap_tree *src_mt,
 625                          int level,
 626                          int face,
 627                          int depth)
 628
 629 {
 630    gl_format format = src_mt->format;
 631    uint32_t width = src_mt->level[level].width;
 632    uint32_t height = src_mt->level[level].height;
 633    int slice;
 634
 635    if (face > 0)
 636       slice = face;
 637    else
 638       slice = depth;
 639
 640    assert(depth < src_mt->level[level].depth);
 641    assert(src_mt->format == dst_mt->format);
 642
 643    if (dst_mt->compressed) {
 644       height = ALIGN(height, dst_mt->align_h) / dst_mt->align_h;
 645       width = ALIGN(width, dst_mt->align_w);
 646    }
 647
 648    uint32_t dst_x, dst_y, src_x, src_y;
 649    intel_miptree_get_image_offset(dst_mt, level, slice, &dst_x, &dst_y);
 650    intel_miptree_get_image_offset(src_mt, level, slice, &src_x, &src_y);
 651
 652    DBG("validate blit mt %s %p %d,%d/%d -> mt %s %p %d,%d/%d (%dx%d)\n",
 653        _mesa_get_format_name(src_mt->format),
 654        src_mt, src_x, src_y, src_mt->region->pitch,
 655        _mesa_get_format_name(dst_mt->format),
 656        dst_mt, dst_x, dst_y, dst_mt->region->pitch,
 657        width, height);
 658
 659    if (!intel_miptree_blit(intel,
 660                            src_mt, level, slice, 0, 0, false,
 661                            dst_mt, level, slice, 0, 0, false,
 662                            width, height, GL_COPY)) {
 663       perf_debug("miptree validate blit for %s failed\n",
 664                  _mesa_get_format_name(format));
 665
 666       intel_miptree_copy_slice_sw(intel, dst_mt, src_mt, level, slice,
 667                                   width, height);
 668    }
 669 }
 670
 671 /**
 672  * Copies the image's current data to the given miptree, and associates that
 673  * miptree with the image.
 674  *
 675  * If \c invalidate is true, then the actual image data does not need to be
 676  * copied, but the image still needs to be associated to the new miptree (this
 677  * is set to true if we're about to clear the image).
 678  */
 679 void
 680 intel_miptree_copy_teximage(struct intel_context *intel,
 681                             struct intel_texture_image *intelImage,
 682                             struct intel_mipmap_tree *dst_mt,
 683                             bool invalidate)
 684 {
 685    struct intel_mipmap_tree *src_mt = intelImage->mt;
 686    struct intel_texture_object *intel_obj =
 687       intel_texture_object(intelImage->base.Base.TexObject);
 688    int level = intelImage->base.Base.Level;
 689    int face = intelImage->base.Base.Face;
 690    GLuint depth = intelImage->base.Base.Depth;
 691
 692    if (!invalidate) {
 693       for (int slice = 0; slice < depth; slice++) {
 694          intel_miptree_copy_slice(intel, dst_mt, src_mt, level, face, slice);
 695       }
 696    }
 697
 698    intel_miptree_reference(&intelImage->mt, dst_mt);
 699    intel_obj->needs_validate = true;
 700 }
 701
 702 void *
 703 intel_miptree_map_raw(struct intel_context *intel, struct intel_mipmap_tree *mt)
 704 {
 705    drm_intel_bo *bo = mt->region->bo;
 706
 707    if (unlikely(INTEL_DEBUG & DEBUG_PERF)) {
 708       if (drm_intel_bo_busy(bo)) {
 709          perf_debug("Mapping a busy BO, causing a stall on the GPU.\n");
 710       }
 711    }
 712
 713    intel_flush(&intel->ctx);
 714
 715    if (mt->region->tiling != I915_TILING_NONE)
 716       drm_intel_gem_bo_map_gtt(bo);
 717    else
 718       drm_intel_bo_map(bo, true);
 719
 720    return bo->virtual;
 721 }
 722
 723 void
 724 intel_miptree_unmap_raw(struct intel_context *intel,
 725                         struct intel_mipmap_tree *mt)
 726 {
 727    drm_intel_bo_unmap(mt->region->bo);
 728 }
 729
 730 static void
 731 intel_miptree_map_gtt(struct intel_context *intel,
 732                       struct intel_mipmap_tree *mt,
 733                       struct intel_miptree_map *map,
 734                       unsigned int level, unsigned int slice)
 735 {
 736    unsigned int bw, bh;
 737    void *base;
 738    unsigned int image_x, image_y;
 739    int x = map->x;
 740    int y = map->y;
 741
 742    /* For compressed formats, the stride is the number of bytes per
 743     * row of blocks.  intel_miptree_get_image_offset() already does
 744     * the divide.
 745     */
 746    _mesa_get_format_block_size(mt->format, &bw, &bh);
 747    assert(y % bh == 0);
 748    y /= bh;
 749
 750    base = intel_miptree_map_raw(intel, mt) + mt->offset;
 751
 752    if (base == NULL)
 753       map->ptr = NULL;
 754    else {
 755       /* Note that in the case of cube maps, the caller must have passed the
 756        * slice number referencing the face.
 757       */
 758       intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
 759       x += image_x;
 760       y += image_y;
 761
 762       map->stride = mt->region->pitch;
 763       map->ptr = base + y * map->stride + x * mt->cpp;
 764    }
 765
 766    DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
 767        map->x, map->y, map->w, map->h,
 768        mt, _mesa_get_format_name(mt->format),
 769        x, y, map->ptr, map->stride);
 770 }
 771
 772 static void
 773 intel_miptree_unmap_gtt(struct intel_context *intel,
 774                         struct intel_mipmap_tree *mt,
 775                         struct intel_miptree_map *map,
 776                         unsigned int level,
 777                         unsigned int slice)
 778 {
 779    intel_miptree_unmap_raw(intel, mt);
 780 }
 781
 782 static void
 783 intel_miptree_map_blit(struct intel_context *intel,
 784                        struct intel_mipmap_tree *mt,
 785                        struct intel_miptree_map *map,
 786                        unsigned int level, unsigned int slice)
 787 {
 788    map->mt = intel_miptree_create(intel, GL_TEXTURE_2D, mt->format,
 789                                   0, 0,
 790                                   map->w, map->h, 1,
 791                                   false,
 792                                   INTEL_MIPTREE_TILING_NONE);
 793    if (!map->mt) {
 794       fprintf(stderr, "Failed to allocate blit temporary\n");
 795       goto fail;
 796    }
 797    map->stride = map->mt->region->pitch;
 798
 799    if (!intel_miptree_blit(intel,
 800                            mt, level, slice,
 801                            map->x, map->y, false,
 802                            map->mt, 0, 0,
 803                            0, 0, false,
 804                            map->w, map->h, GL_COPY)) {
 805       fprintf(stderr, "Failed to blit\n");
 806       goto fail;
 807    }
 808
 809    intel_batchbuffer_flush(intel);
 810    map->ptr = intel_miptree_map_raw(intel, map->mt);
 811
 812    DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
 813        map->x, map->y, map->w, map->h,
 814        mt, _mesa_get_format_name(mt->format),
 815        level, slice, map->ptr, map->stride);
 816
 817    return;
 818
 819 fail:
 820    intel_miptree_release(&map->mt);
 821    map->ptr = NULL;
 822    map->stride = 0;
 823 }
 824
 825 static void
 826 intel_miptree_unmap_blit(struct intel_context *intel,
 827                          struct intel_mipmap_tree *mt,
 828                          struct intel_miptree_map *map,
 829                          unsigned int level,
 830                          unsigned int slice)
 831 {
 832    struct gl_context *ctx = &intel->ctx;
 833
 834    intel_miptree_unmap_raw(intel, map->mt);
 835
 836    if (map->mode & GL_MAP_WRITE_BIT) {
 837       bool ok = intel_miptree_blit(intel,
 838                                    map->mt, 0, 0,
 839                                    0, 0, false,
 840                                    mt, level, slice,
 841                                    map->x, map->y, false,
 842                                    map->w, map->h, GL_COPY);
 843       WARN_ONCE(!ok, "Failed to blit from linear temporary mapping");
 844    }
 845
 846    intel_miptree_release(&map->mt);
 847 }
 848
 849 /**
 850  * Create and attach a map to the miptree at (level, slice). Return the
 851  * attached map.
 852  */
 853 static struct intel_miptree_map*
 854 intel_miptree_attach_map(struct intel_mipmap_tree *mt,
 855                          unsigned int level,
 856                          unsigned int slice,
 857                          unsigned int x,
 858                          unsigned int y,
 859                          unsigned int w,
 860                          unsigned int h,
 861                          GLbitfield mode)
 862 {
 863    struct intel_miptree_map *map = calloc(1, sizeof(*map));
 864
 865    if (!map)
 866       return NULL;
 867
 868    assert(mt->level[level].slice[slice].map == NULL);
 869    mt->level[level].slice[slice].map = map;
 870
 871    map->mode = mode;
 872    map->x = x;
 873    map->y = y;
 874    map->w = w;
 875    map->h = h;
 876
 877    return map;
 878 }
 879
 880 /**
 881  * Release the map at (level, slice).
 882  */
 883 static void
 884 intel_miptree_release_map(struct intel_mipmap_tree *mt,
 885                          unsigned int level,
 886                          unsigned int slice)
 887 {
 888    struct intel_miptree_map **map;
 889
 890    map = &mt->level[level].slice[slice].map;
 891    free(*map);
 892    *map = NULL;
 893 }
 894
 895 void
 896 intel_miptree_map(struct intel_context *intel,
 897                   struct intel_mipmap_tree *mt,
 898                   unsigned int level,
 899                   unsigned int slice,
 900                   unsigned int x,
 901                   unsigned int y,
 902                   unsigned int w,
 903                   unsigned int h,
 904                   GLbitfield mode,
 905                   void **out_ptr,
 906                   int *out_stride)
 907 {
 908    struct intel_miptree_map *map;
 909
 910    map = intel_miptree_attach_map(mt, level, slice, x, y, w, h, mode);
 911    if (!map){
 912       *out_ptr = NULL;
 913       *out_stride = 0;
 914       return;
 915    }
 916
 917    /* See intel_miptree_blit() for details on the 32k pitch limit. */
 918    if (mt->region->tiling != I915_TILING_NONE &&
 919        mt->region->bo->size >= intel->max_gtt_map_object_size) {
 920       assert(mt->region->pitch < 32768);
 921       intel_miptree_map_blit(intel, mt, map, level, slice);
 922    } else {
 923       intel_miptree_map_gtt(intel, mt, map, level, slice);
 924    }
 925
 926    *out_ptr = map->ptr;
 927    *out_stride = map->stride;
 928
 929    if (map->ptr == NULL)
 930       intel_miptree_release_map(mt, level, slice);
 931 }
 932
 933 void
 934 intel_miptree_unmap(struct intel_context *intel,
 935                     struct intel_mipmap_tree *mt,
 936                     unsigned int level,
 937                     unsigned int slice)
 938 {
 939    struct intel_miptree_map *map = mt->level[level].slice[slice].map;
 940
 941    if (!map)
 942       return;
 943
 944    DBG("%s: mt %p (%s) level %d slice %d\n", __FUNCTION__,
 945        mt, _mesa_get_format_name(mt->format), level, slice);
 946
 947    if (map->mt) {
 948       intel_miptree_unmap_blit(intel, mt, map, level, slice);
 949    } else {
 950       intel_miptree_unmap_gtt(intel, mt, map, level, slice);
 951    }
 952
 953    intel_miptree_release_map(mt, level, slice);
 954 }