i915: Remove all the MSAA support code.
[mesa.git] / src / mesa / drivers / dri / i915 / intel_mipmap_tree.c
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-../intel/intel_mipmap_tree.c
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+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include <GL/gl.h>
+#include <GL/internal/dri_interface.h>
+
+#include "intel_batchbuffer.h"
+#include "intel_chipset.h"
+#include "intel_context.h"
+#include "intel_mipmap_tree.h"
+#include "intel_regions.h"
+#include "intel_tex_layout.h"
+#include "intel_tex.h"
+#include "intel_blit.h"
+
+#ifndef I915
+#include "brw_blorp.h"
+#endif
+
+#include "main/enums.h"
+#include "main/formats.h"
+#include "main/glformats.h"
+#include "main/texcompress_etc.h"
+#include "main/teximage.h"
+
+#define FILE_DEBUG_FLAG DEBUG_MIPTREE
+
+static GLenum
+target_to_target(GLenum target)
+{
+   switch (target) {
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
+      return GL_TEXTURE_CUBE_MAP_ARB;
+   default:
+      return target;
+   }
+}
+
+/**
+ * @param for_bo Indicates that the caller is
+ *        intel_miptree_create_for_bo(). If true, then do not create
+ *        \c stencil_mt.
+ */
+struct intel_mipmap_tree *
+intel_miptree_create_layout(struct intel_context *intel,
+                            GLenum target,
+                            gl_format format,
+                            GLuint first_level,
+                            GLuint last_level,
+                            GLuint width0,
+                            GLuint height0,
+                            GLuint depth0,
+                            bool for_bo)
+{
+   struct intel_mipmap_tree *mt = calloc(sizeof(*mt), 1);
+   if (!mt)
+      return NULL;
+
+   DBG("%s target %s format %s level %d..%d <-- %p\n", __FUNCTION__,
+       _mesa_lookup_enum_by_nr(target),
+       _mesa_get_format_name(format),
+       first_level, last_level, mt);
+
+   mt->target = target_to_target(target);
+   mt->format = format;
+   mt->first_level = first_level;
+   mt->last_level = last_level;
+   mt->logical_width0 = width0;
+   mt->logical_height0 = height0;
+   mt->logical_depth0 = depth0;
+
+   /* The cpp is bytes per (1, blockheight)-sized block for compressed
+    * textures.  This is why you'll see divides by blockheight all over
+    */
+   unsigned bw, bh;
+   _mesa_get_format_block_size(format, &bw, &bh);
+   assert(_mesa_get_format_bytes(mt->format) % bw == 0);
+   mt->cpp = _mesa_get_format_bytes(mt->format) / bw;
+
+   mt->compressed = _mesa_is_format_compressed(format);
+   mt->refcount = 1; 
+
+   if (target == GL_TEXTURE_CUBE_MAP) {
+      assert(depth0 == 1);
+      depth0 = 6;
+   }
+
+   mt->physical_width0 = width0;
+   mt->physical_height0 = height0;
+   mt->physical_depth0 = depth0;
+
+   if (!for_bo &&
+       _mesa_get_format_base_format(format) == GL_DEPTH_STENCIL &&
+       (intel->must_use_separate_stencil)) {
+      mt->stencil_mt = intel_miptree_create(intel,
+                                            mt->target,
+                                            MESA_FORMAT_S8,
+                                            mt->first_level,
+                                            mt->last_level,
+                                            mt->logical_width0,
+                                            mt->logical_height0,
+                                            mt->logical_depth0,
+                                            true,
+                                            INTEL_MIPTREE_TILING_ANY);
+      if (!mt->stencil_mt) {
+        intel_miptree_release(&mt);
+        return NULL;
+      }
+
+      /* Fix up the Z miptree format for how we're splitting out separate
+       * stencil.  Gen7 expects there to be no stencil bits in its depth buffer.
+       */
+      if (mt->format == MESA_FORMAT_S8_Z24) {
+        mt->format = MESA_FORMAT_X8_Z24;
+      } else if (mt->format == MESA_FORMAT_Z32_FLOAT_X24S8) {
+        mt->format = MESA_FORMAT_Z32_FLOAT;
+        mt->cpp = 4;
+      } else {
+        _mesa_problem(NULL, "Unknown format %s in separate stencil mt\n",
+                      _mesa_get_format_name(mt->format));
+      }
+   }
+
+   intel_get_texture_alignment_unit(intel, mt->format,
+                                   &mt->align_w, &mt->align_h);
+
+#ifdef I915
+   (void) intel;
+   if (intel->is_945)
+      i945_miptree_layout(mt);
+   else
+      i915_miptree_layout(mt);
+#else
+   brw_miptree_layout(intel, mt);
+#endif
+
+   return mt;
+}
+
+/**
+ * \brief Helper function for intel_miptree_create().
+ */
+static uint32_t
+intel_miptree_choose_tiling(struct intel_context *intel,
+                            gl_format format,
+                            uint32_t width0,
+                            enum intel_miptree_tiling_mode requested,
+                            struct intel_mipmap_tree *mt)
+{
+
+   if (format == MESA_FORMAT_S8) {
+      /* The stencil buffer is W tiled. However, we request from the kernel a
+       * non-tiled buffer because the GTT is incapable of W fencing.
+       */
+      return I915_TILING_NONE;
+   }
+
+   /* Some usages may want only one type of tiling, like depth miptrees (Y
+    * tiled), or temporary BOs for uploading data once (linear).
+    */
+   switch (requested) {
+   case INTEL_MIPTREE_TILING_ANY:
+      break;
+   case INTEL_MIPTREE_TILING_Y:
+      return I915_TILING_Y;
+   case INTEL_MIPTREE_TILING_NONE:
+      return I915_TILING_NONE;
+   }
+
+   GLenum base_format = _mesa_get_format_base_format(format);
+   if (intel->gen >= 4 &&
+       (base_format == GL_DEPTH_COMPONENT ||
+        base_format == GL_DEPTH_STENCIL_EXT))
+      return I915_TILING_Y;
+
+   int minimum_pitch = mt->total_width * mt->cpp;
+
+   /* If the width is much smaller than a tile, don't bother tiling. */
+   if (minimum_pitch < 64)
+      return I915_TILING_NONE;
+
+   if (ALIGN(minimum_pitch, 512) >= 32768) {
+      perf_debug("%dx%d miptree too large to blit, falling back to untiled",
+                 mt->total_width, mt->total_height);
+      return I915_TILING_NONE;
+   }
+
+   /* Pre-gen6 doesn't have BLORP to handle Y-tiling, so use X-tiling. */
+   if (intel->gen < 6)
+      return I915_TILING_X;
+
+   return I915_TILING_Y | I915_TILING_X;
+}
+
+struct intel_mipmap_tree *
+intel_miptree_create(struct intel_context *intel,
+                    GLenum target,
+                    gl_format format,
+                    GLuint first_level,
+                    GLuint last_level,
+                    GLuint width0,
+                    GLuint height0,
+                    GLuint depth0,
+                    bool expect_accelerated_upload,
+                     enum intel_miptree_tiling_mode requested_tiling)
+{
+   struct intel_mipmap_tree *mt;
+   gl_format tex_format = format;
+   gl_format etc_format = MESA_FORMAT_NONE;
+   GLuint total_width, total_height;
+
+   if (!intel->is_baytrail) {
+      switch (format) {
+      case MESA_FORMAT_ETC1_RGB8:
+         format = MESA_FORMAT_RGBX8888_REV;
+         break;
+      case MESA_FORMAT_ETC2_RGB8:
+         format = MESA_FORMAT_RGBX8888_REV;
+         break;
+      case MESA_FORMAT_ETC2_SRGB8:
+      case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
+      case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
+         format = MESA_FORMAT_SARGB8;
+         break;
+      case MESA_FORMAT_ETC2_RGBA8_EAC:
+      case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
+         format = MESA_FORMAT_RGBA8888_REV;
+         break;
+      case MESA_FORMAT_ETC2_R11_EAC:
+         format = MESA_FORMAT_R16;
+         break;
+      case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
+         format = MESA_FORMAT_SIGNED_R16;
+         break;
+      case MESA_FORMAT_ETC2_RG11_EAC:
+         format = MESA_FORMAT_GR1616;
+         break;
+      case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
+         format = MESA_FORMAT_SIGNED_GR1616;
+         break;
+      default:
+         /* Non ETC1 / ETC2 format */
+         break;
+      }
+   }
+
+   etc_format = (format != tex_format) ? tex_format : MESA_FORMAT_NONE;
+
+   mt = intel_miptree_create_layout(intel, target, format,
+                                     first_level, last_level, width0,
+                                     height0, depth0,
+                                     false);
+   /*
+    * pitch == 0 || height == 0  indicates the null texture
+    */
+   if (!mt || !mt->total_width || !mt->total_height) {
+      intel_miptree_release(&mt);
+      return NULL;
+   }
+
+   total_width = mt->total_width;
+   total_height = mt->total_height;
+
+   if (format == MESA_FORMAT_S8) {
+      /* Align to size of W tile, 64x64. */
+      total_width = ALIGN(total_width, 64);
+      total_height = ALIGN(total_height, 64);
+   }
+
+   uint32_t tiling = intel_miptree_choose_tiling(intel, format, width0,
+                                                 requested_tiling,
+                                                 mt);
+   bool y_or_x = tiling == (I915_TILING_Y | I915_TILING_X);
+
+   mt->etc_format = etc_format;
+   mt->region = intel_region_alloc(intel->intelScreen,
+                                  y_or_x ? I915_TILING_Y : tiling,
+                                  mt->cpp,
+                                  total_width,
+                                  total_height,
+                                  expect_accelerated_upload);
+
+   /* If the region is too large to fit in the aperture, we need to use the
+    * BLT engine to support it.  The BLT paths can't currently handle Y-tiling,
+    * so we need to fall back to X.
+    */
+   if (y_or_x && mt->region->bo->size >= intel->max_gtt_map_object_size) {
+      perf_debug("%dx%d miptree larger than aperture; falling back to X-tiled\n",
+                 mt->total_width, mt->total_height);
+      intel_region_release(&mt->region);
+
+      mt->region = intel_region_alloc(intel->intelScreen,
+                                      I915_TILING_X,
+                                      mt->cpp,
+                                      total_width,
+                                      total_height,
+                                      expect_accelerated_upload);
+   }
+
+   mt->offset = 0;
+
+   if (!mt->region) {
+       intel_miptree_release(&mt);
+       return NULL;
+   }
+
+   return mt;
+}
+
+struct intel_mipmap_tree *
+intel_miptree_create_for_bo(struct intel_context *intel,
+                            drm_intel_bo *bo,
+                            gl_format format,
+                            uint32_t offset,
+                            uint32_t width,
+                            uint32_t height,
+                            int pitch,
+                            uint32_t tiling)
+{
+   struct intel_mipmap_tree *mt;
+
+   struct intel_region *region = calloc(1, sizeof(*region));
+   if (!region)
+      return NULL;
+
+   /* Nothing will be able to use this miptree with the BO if the offset isn't
+    * aligned.
+    */
+   if (tiling != I915_TILING_NONE)
+      assert(offset % 4096 == 0);
+
+   /* miptrees can't handle negative pitch.  If you need flipping of images,
+    * that's outside of the scope of the mt.
+    */
+   assert(pitch >= 0);
+
+   mt = intel_miptree_create_layout(intel, GL_TEXTURE_2D, format,
+                                    0, 0,
+                                    width, height, 1,
+                                    true);
+   if (!mt)
+      return mt;
+
+   region->cpp = mt->cpp;
+   region->width = width;
+   region->height = height;
+   region->pitch = pitch;
+   region->refcount = 1;
+   drm_intel_bo_reference(bo);
+   region->bo = bo;
+   region->tiling = tiling;
+
+   mt->region = region;
+   mt->offset = offset;
+
+   return mt;
+}
+
+
+/**
+ * For a singlesample DRI2 buffer, this simply wraps the given region with a miptree.
+ *
+ * For a multisample DRI2 buffer, this wraps the given region with
+ * a singlesample miptree, then creates a multisample miptree into which the
+ * singlesample miptree is embedded as a child.
+ */
+struct intel_mipmap_tree*
+intel_miptree_create_for_dri2_buffer(struct intel_context *intel,
+                                     unsigned dri_attachment,
+                                     gl_format format,
+                                     struct intel_region *region)
+{
+   struct intel_mipmap_tree *mt = NULL;
+
+   /* Only the front and back buffers, which are color buffers, are shared
+    * through DRI2.
+    */
+   assert(dri_attachment == __DRI_BUFFER_BACK_LEFT ||
+          dri_attachment == __DRI_BUFFER_FRONT_LEFT ||
+          dri_attachment == __DRI_BUFFER_FAKE_FRONT_LEFT);
+   assert(_mesa_get_format_base_format(format) == GL_RGB ||
+          _mesa_get_format_base_format(format) == GL_RGBA);
+
+   mt = intel_miptree_create_for_bo(intel,
+                                    region->bo,
+                                    format,
+                                    0,
+                                    region->width,
+                                    region->height,
+                                    region->pitch,
+                                    region->tiling);
+   if (!mt)
+      return NULL;
+   mt->region->name = region->name;
+
+   return mt;
+}
+
+struct intel_mipmap_tree*
+intel_miptree_create_for_renderbuffer(struct intel_context *intel,
+                                      gl_format format,
+                                      uint32_t width,
+                                      uint32_t height)
+{
+   uint32_t depth = 1;
+
+   return intel_miptree_create(intel, GL_TEXTURE_2D, format, 0, 0,
+                               width, height, depth, true,
+                               INTEL_MIPTREE_TILING_ANY);
+}
+
+void
+intel_miptree_reference(struct intel_mipmap_tree **dst,
+                        struct intel_mipmap_tree *src)
+{
+   if (*dst == src)
+      return;
+
+   intel_miptree_release(dst);
+
+   if (src) {
+      src->refcount++;
+      DBG("%s %p refcount now %d\n", __FUNCTION__, src, src->refcount);
+   }
+
+   *dst = src;
+}
+
+
+void
+intel_miptree_release(struct intel_mipmap_tree **mt)
+{
+   if (!*mt)
+      return;
+
+   DBG("%s %p refcount will be %d\n", __FUNCTION__, *mt, (*mt)->refcount - 1);
+   if (--(*mt)->refcount <= 0) {
+      GLuint i;
+
+      DBG("%s deleting %p\n", __FUNCTION__, *mt);
+
+      intel_region_release(&((*mt)->region));
+      intel_miptree_release(&(*mt)->stencil_mt);
+
+      for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
+        free((*mt)->level[i].slice);
+      }
+
+      free(*mt);
+   }
+   *mt = NULL;
+}
+
+void
+intel_miptree_get_dimensions_for_image(struct gl_texture_image *image,
+                                       int *width, int *height, int *depth)
+{
+   switch (image->TexObject->Target) {
+   case GL_TEXTURE_1D_ARRAY:
+      *width = image->Width;
+      *height = 1;
+      *depth = image->Height;
+      break;
+   default:
+      *width = image->Width;
+      *height = image->Height;
+      *depth = image->Depth;
+      break;
+   }
+}
+
+/**
+ * Can the image be pulled into a unified mipmap tree?  This mirrors
+ * the completeness test in a lot of ways.
+ *
+ * Not sure whether I want to pass gl_texture_image here.
+ */
+bool
+intel_miptree_match_image(struct intel_mipmap_tree *mt,
+                          struct gl_texture_image *image)
+{
+   struct intel_texture_image *intelImage = intel_texture_image(image);
+   GLuint level = intelImage->base.Base.Level;
+   int width, height, depth;
+
+   /* glTexImage* choose the texture object based on the target passed in, and
+    * objects can't change targets over their lifetimes, so this should be
+    * true.
+    */
+   assert(target_to_target(image->TexObject->Target) == mt->target);
+
+   gl_format mt_format = mt->format;
+   if (mt->format == MESA_FORMAT_X8_Z24 && mt->stencil_mt)
+      mt_format = MESA_FORMAT_S8_Z24;
+   if (mt->format == MESA_FORMAT_Z32_FLOAT && mt->stencil_mt)
+      mt_format = MESA_FORMAT_Z32_FLOAT_X24S8;
+   if (mt->etc_format != MESA_FORMAT_NONE)
+      mt_format = mt->etc_format;
+
+   if (image->TexFormat != mt_format)
+      return false;
+
+   intel_miptree_get_dimensions_for_image(image, &width, &height, &depth);
+
+   if (mt->target == GL_TEXTURE_CUBE_MAP)
+      depth = 6;
+
+   /* Test image dimensions against the base level image adjusted for
+    * minification.  This will also catch images not present in the
+    * tree, changed targets, etc.
+    */
+   if (mt->target == GL_TEXTURE_2D_MULTISAMPLE ||
+         mt->target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
+      /* nonzero level here is always bogus */
+      assert(level == 0);
+
+      if (width != mt->logical_width0 ||
+            height != mt->logical_height0 ||
+            depth != mt->logical_depth0) {
+         return false;
+      }
+   }
+   else {
+      /* all normal textures, renderbuffers, etc */
+      if (width != mt->level[level].width ||
+          height != mt->level[level].height ||
+          depth != mt->level[level].depth) {
+         return false;
+      }
+   }
+
+   return true;
+}
+
+
+void
+intel_miptree_set_level_info(struct intel_mipmap_tree *mt,
+                            GLuint level,
+                            GLuint x, GLuint y,
+                            GLuint w, GLuint h, GLuint d)
+{
+   mt->level[level].width = w;
+   mt->level[level].height = h;
+   mt->level[level].depth = d;
+   mt->level[level].level_x = x;
+   mt->level[level].level_y = y;
+
+   DBG("%s level %d size: %d,%d,%d offset %d,%d\n", __FUNCTION__,
+       level, w, h, d, x, y);
+
+   assert(mt->level[level].slice == NULL);
+
+   mt->level[level].slice = calloc(d, sizeof(*mt->level[0].slice));
+   mt->level[level].slice[0].x_offset = mt->level[level].level_x;
+   mt->level[level].slice[0].y_offset = mt->level[level].level_y;
+}
+
+
+void
+intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
+                              GLuint level, GLuint img,
+                              GLuint x, GLuint y)
+{
+   if (img == 0 && level == 0)
+      assert(x == 0 && y == 0);
+
+   assert(img < mt->level[level].depth);
+
+   mt->level[level].slice[img].x_offset = mt->level[level].level_x + x;
+   mt->level[level].slice[img].y_offset = mt->level[level].level_y + y;
+
+   DBG("%s level %d img %d pos %d,%d\n",
+       __FUNCTION__, level, img,
+       mt->level[level].slice[img].x_offset,
+       mt->level[level].slice[img].y_offset);
+}
+
+void
+intel_miptree_get_image_offset(struct intel_mipmap_tree *mt,
+                              GLuint level, GLuint slice,
+                              GLuint *x, GLuint *y)
+{
+   assert(slice < mt->level[level].depth);
+
+   *x = mt->level[level].slice[slice].x_offset;
+   *y = mt->level[level].slice[slice].y_offset;
+}
+
+/**
+ * Rendering with tiled buffers requires that the base address of the buffer
+ * be aligned to a page boundary.  For renderbuffers, and sometimes with
+ * textures, we may want the surface to point at a texture image level that
+ * isn't at a page boundary.
+ *
+ * This function returns an appropriately-aligned base offset
+ * according to the tiling restrictions, plus any required x/y offset
+ * from there.
+ */
+uint32_t
+intel_miptree_get_tile_offsets(struct intel_mipmap_tree *mt,
+                               GLuint level, GLuint slice,
+                               uint32_t *tile_x,
+                               uint32_t *tile_y)
+{
+   struct intel_region *region = mt->region;
+   uint32_t x, y;
+   uint32_t mask_x, mask_y;
+
+   intel_region_get_tile_masks(region, &mask_x, &mask_y, false);
+   intel_miptree_get_image_offset(mt, level, slice, &x, &y);
+
+   *tile_x = x & mask_x;
+   *tile_y = y & mask_y;
+
+   return intel_region_get_aligned_offset(region, x & ~mask_x, y & ~mask_y,
+                                          false);
+}
+
+static void
+intel_miptree_copy_slice_sw(struct intel_context *intel,
+                            struct intel_mipmap_tree *dst_mt,
+                            struct intel_mipmap_tree *src_mt,
+                            int level,
+                            int slice,
+                            int width,
+                            int height)
+{
+   void *src, *dst;
+   int src_stride, dst_stride;
+   int cpp = dst_mt->cpp;
+
+   intel_miptree_map(intel, src_mt,
+                     level, slice,
+                     0, 0,
+                     width, height,
+                     GL_MAP_READ_BIT | BRW_MAP_DIRECT_BIT,
+                     &src, &src_stride);
+
+   intel_miptree_map(intel, dst_mt,
+                     level, slice,
+                     0, 0,
+                     width, height,
+                     GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT |
+                     BRW_MAP_DIRECT_BIT,
+                     &dst, &dst_stride);
+
+   DBG("sw blit %s mt %p %p/%d -> %s mt %p %p/%d (%dx%d)\n",
+       _mesa_get_format_name(src_mt->format),
+       src_mt, src, src_stride,
+       _mesa_get_format_name(dst_mt->format),
+       dst_mt, dst, dst_stride,
+       width, height);
+
+   int row_size = cpp * width;
+   if (src_stride == row_size &&
+       dst_stride == row_size) {
+      memcpy(dst, src, row_size * height);
+   } else {
+      for (int i = 0; i < height; i++) {
+         memcpy(dst, src, row_size);
+         dst += dst_stride;
+         src += src_stride;
+      }
+   }
+
+   intel_miptree_unmap(intel, dst_mt, level, slice);
+   intel_miptree_unmap(intel, src_mt, level, slice);
+
+   /* Don't forget to copy the stencil data over, too.  We could have skipped
+    * passing BRW_MAP_DIRECT_BIT, but that would have meant intel_miptree_map
+    * shuffling the two data sources in/out of temporary storage instead of
+    * the direct mapping we get this way.
+    */
+   if (dst_mt->stencil_mt) {
+      assert(src_mt->stencil_mt);
+      intel_miptree_copy_slice_sw(intel, dst_mt->stencil_mt, src_mt->stencil_mt,
+                                  level, slice, width, height);
+   }
+}
+
+static void
+intel_miptree_copy_slice(struct intel_context *intel,
+                        struct intel_mipmap_tree *dst_mt,
+                        struct intel_mipmap_tree *src_mt,
+                        int level,
+                        int face,
+                        int depth)
+
+{
+   gl_format format = src_mt->format;
+   uint32_t width = src_mt->level[level].width;
+   uint32_t height = src_mt->level[level].height;
+   int slice;
+
+   if (face > 0)
+      slice = face;
+   else
+      slice = depth;
+
+   assert(depth < src_mt->level[level].depth);
+   assert(src_mt->format == dst_mt->format);
+
+   if (dst_mt->compressed) {
+      height = ALIGN(height, dst_mt->align_h) / dst_mt->align_h;
+      width = ALIGN(width, dst_mt->align_w);
+   }
+
+   /* If it's a packed depth/stencil buffer with separate stencil, the blit
+    * below won't apply since we can't do the depth's Y tiling or the
+    * stencil's W tiling in the blitter.
+    */
+   if (src_mt->stencil_mt) {
+      intel_miptree_copy_slice_sw(intel,
+                                  dst_mt, src_mt,
+                                  level, slice,
+                                  width, height);
+      return;
+   }
+
+   uint32_t dst_x, dst_y, src_x, src_y;
+   intel_miptree_get_image_offset(dst_mt, level, slice, &dst_x, &dst_y);
+   intel_miptree_get_image_offset(src_mt, level, slice, &src_x, &src_y);
+
+   DBG("validate blit mt %s %p %d,%d/%d -> mt %s %p %d,%d/%d (%dx%d)\n",
+       _mesa_get_format_name(src_mt->format),
+       src_mt, src_x, src_y, src_mt->region->pitch,
+       _mesa_get_format_name(dst_mt->format),
+       dst_mt, dst_x, dst_y, dst_mt->region->pitch,
+       width, height);
+
+   if (!intel_miptree_blit(intel,
+                           src_mt, level, slice, 0, 0, false,
+                           dst_mt, level, slice, 0, 0, false,
+                           width, height, GL_COPY)) {
+      perf_debug("miptree validate blit for %s failed\n",
+                 _mesa_get_format_name(format));
+
+      intel_miptree_copy_slice_sw(intel, dst_mt, src_mt, level, slice,
+                                  width, height);
+   }
+}
+
+/**
+ * Copies the image's current data to the given miptree, and associates that
+ * miptree with the image.
+ *
+ * If \c invalidate is true, then the actual image data does not need to be
+ * copied, but the image still needs to be associated to the new miptree (this
+ * is set to true if we're about to clear the image).
+ */
+void
+intel_miptree_copy_teximage(struct intel_context *intel,
+                           struct intel_texture_image *intelImage,
+                           struct intel_mipmap_tree *dst_mt,
+                            bool invalidate)
+{
+   struct intel_mipmap_tree *src_mt = intelImage->mt;
+   struct intel_texture_object *intel_obj =
+      intel_texture_object(intelImage->base.Base.TexObject);
+   int level = intelImage->base.Base.Level;
+   int face = intelImage->base.Base.Face;
+   GLuint depth = intelImage->base.Base.Depth;
+
+   if (!invalidate) {
+      for (int slice = 0; slice < depth; slice++) {
+         intel_miptree_copy_slice(intel, dst_mt, src_mt, level, face, slice);
+      }
+   }
+
+   intel_miptree_reference(&intelImage->mt, dst_mt);
+   intel_obj->needs_validate = true;
+}
+
+/**
+ * \brief Get pointer offset into stencil buffer.
+ *
+ * The stencil buffer is W tiled. Since the GTT is incapable of W fencing, we
+ * must decode the tile's layout in software.
+ *
+ * See
+ *   - PRM, 2011 Sandy Bridge, Volume 1, Part 2, Section 4.5.2.1 W-Major Tile
+ *     Format.
+ *   - PRM, 2011 Sandy Bridge, Volume 1, Part 2, Section 4.5.3 Tiling Algorithm
+ *
+ * Even though the returned offset is always positive, the return type is
+ * signed due to
+ *    commit e8b1c6d6f55f5be3bef25084fdd8b6127517e137
+ *    mesa: Fix return type of  _mesa_get_format_bytes() (#37351)
+ */
+static intptr_t
+intel_offset_S8(uint32_t stride, uint32_t x, uint32_t y, bool swizzled)
+{
+   uint32_t tile_size = 4096;
+   uint32_t tile_width = 64;
+   uint32_t tile_height = 64;
+   uint32_t row_size = 64 * stride;
+
+   uint32_t tile_x = x / tile_width;
+   uint32_t tile_y = y / tile_height;
+
+   /* The byte's address relative to the tile's base addres. */
+   uint32_t byte_x = x % tile_width;
+   uint32_t byte_y = y % tile_height;
+
+   uintptr_t u = tile_y * row_size
+               + tile_x * tile_size
+               + 512 * (byte_x / 8)
+               +  64 * (byte_y / 8)
+               +  32 * ((byte_y / 4) % 2)
+               +  16 * ((byte_x / 4) % 2)
+               +   8 * ((byte_y / 2) % 2)
+               +   4 * ((byte_x / 2) % 2)
+               +   2 * (byte_y % 2)
+               +   1 * (byte_x % 2);
+
+   if (swizzled) {
+      /* adjust for bit6 swizzling */
+      if (((byte_x / 8) % 2) == 1) {
+        if (((byte_y / 8) % 2) == 0) {
+           u += 64;
+        } else {
+           u -= 64;
+        }
+      }
+   }
+
+   return u;
+}
+
+void *
+intel_miptree_map_raw(struct intel_context *intel, struct intel_mipmap_tree *mt)
+{
+   drm_intel_bo *bo = mt->region->bo;
+
+   if (unlikely(INTEL_DEBUG & DEBUG_PERF)) {
+      if (drm_intel_bo_busy(bo)) {
+         perf_debug("Mapping a busy BO, causing a stall on the GPU.\n");
+      }
+   }
+
+   intel_flush(&intel->ctx);
+
+   if (mt->region->tiling != I915_TILING_NONE)
+      drm_intel_gem_bo_map_gtt(bo);
+   else
+      drm_intel_bo_map(bo, true);
+
+   return bo->virtual;
+}
+
+void
+intel_miptree_unmap_raw(struct intel_context *intel,
+                        struct intel_mipmap_tree *mt)
+{
+   drm_intel_bo_unmap(mt->region->bo);
+}
+
+static void
+intel_miptree_map_gtt(struct intel_context *intel,
+                     struct intel_mipmap_tree *mt,
+                     struct intel_miptree_map *map,
+                     unsigned int level, unsigned int slice)
+{
+   unsigned int bw, bh;
+   void *base;
+   unsigned int image_x, image_y;
+   int x = map->x;
+   int y = map->y;
+
+   /* For compressed formats, the stride is the number of bytes per
+    * row of blocks.  intel_miptree_get_image_offset() already does
+    * the divide.
+    */
+   _mesa_get_format_block_size(mt->format, &bw, &bh);
+   assert(y % bh == 0);
+   y /= bh;
+
+   base = intel_miptree_map_raw(intel, mt) + mt->offset;
+
+   if (base == NULL)
+      map->ptr = NULL;
+   else {
+      /* Note that in the case of cube maps, the caller must have passed the
+       * slice number referencing the face.
+      */
+      intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
+      x += image_x;
+      y += image_y;
+
+      map->stride = mt->region->pitch;
+      map->ptr = base + y * map->stride + x * mt->cpp;
+   }
+
+   DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
+       map->x, map->y, map->w, map->h,
+       mt, _mesa_get_format_name(mt->format),
+       x, y, map->ptr, map->stride);
+}
+
+static void
+intel_miptree_unmap_gtt(struct intel_context *intel,
+                       struct intel_mipmap_tree *mt,
+                       struct intel_miptree_map *map,
+                       unsigned int level,
+                       unsigned int slice)
+{
+   intel_miptree_unmap_raw(intel, mt);
+}
+
+static void
+intel_miptree_map_blit(struct intel_context *intel,
+                      struct intel_mipmap_tree *mt,
+                      struct intel_miptree_map *map,
+                      unsigned int level, unsigned int slice)
+{
+   map->mt = intel_miptree_create(intel, GL_TEXTURE_2D, mt->format,
+                                  0, 0,
+                                  map->w, map->h, 1,
+                                  false,
+                                  INTEL_MIPTREE_TILING_NONE);
+   if (!map->mt) {
+      fprintf(stderr, "Failed to allocate blit temporary\n");
+      goto fail;
+   }
+   map->stride = map->mt->region->pitch;
+
+   if (!intel_miptree_blit(intel,
+                           mt, level, slice,
+                           map->x, map->y, false,
+                           map->mt, 0, 0,
+                           0, 0, false,
+                           map->w, map->h, GL_COPY)) {
+      fprintf(stderr, "Failed to blit\n");
+      goto fail;
+   }
+
+   intel_batchbuffer_flush(intel);
+   map->ptr = intel_miptree_map_raw(intel, map->mt);
+
+   DBG("%s: %d,%d %dx%d from mt %p (%s) %d,%d = %p/%d\n", __FUNCTION__,
+       map->x, map->y, map->w, map->h,
+       mt, _mesa_get_format_name(mt->format),
+       level, slice, map->ptr, map->stride);
+
+   return;
+
+fail:
+   intel_miptree_release(&map->mt);
+   map->ptr = NULL;
+   map->stride = 0;
+}
+
+static void
+intel_miptree_unmap_blit(struct intel_context *intel,
+                        struct intel_mipmap_tree *mt,
+                        struct intel_miptree_map *map,
+                        unsigned int level,
+                        unsigned int slice)
+{
+   struct gl_context *ctx = &intel->ctx;
+
+   intel_miptree_unmap_raw(intel, map->mt);
+
+   if (map->mode & GL_MAP_WRITE_BIT) {
+      bool ok = intel_miptree_blit(intel,
+                                   map->mt, 0, 0,
+                                   0, 0, false,
+                                   mt, level, slice,
+                                   map->x, map->y, false,
+                                   map->w, map->h, GL_COPY);
+      WARN_ONCE(!ok, "Failed to blit from linear temporary mapping");
+   }
+
+   intel_miptree_release(&map->mt);
+}
+
+static void
+intel_miptree_map_s8(struct intel_context *intel,
+                    struct intel_mipmap_tree *mt,
+                    struct intel_miptree_map *map,
+                    unsigned int level, unsigned int slice)
+{
+   map->stride = map->w;
+   map->buffer = map->ptr = malloc(map->stride * map->h);
+   if (!map->buffer)
+      return;
+
+   /* One of either READ_BIT or WRITE_BIT or both is set.  READ_BIT implies no
+    * INVALIDATE_RANGE_BIT.  WRITE_BIT needs the original values read in unless
+    * invalidate is set, since we'll be writing the whole rectangle from our
+    * temporary buffer back out.
+    */
+   if (!(map->mode & GL_MAP_INVALIDATE_RANGE_BIT)) {
+      uint8_t *untiled_s8_map = map->ptr;
+      uint8_t *tiled_s8_map = intel_miptree_map_raw(intel, mt);
+      unsigned int image_x, image_y;
+
+      intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
+
+      for (uint32_t y = 0; y < map->h; y++) {
+        for (uint32_t x = 0; x < map->w; x++) {
+           ptrdiff_t offset = intel_offset_S8(mt->region->pitch,
+                                              x + image_x + map->x,
+                                              y + image_y + map->y,
+                                              intel->has_swizzling);
+           untiled_s8_map[y * map->w + x] = tiled_s8_map[offset];
+        }
+      }
+
+      intel_miptree_unmap_raw(intel, mt);
+
+      DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
+         map->x, map->y, map->w, map->h,
+         mt, map->x + image_x, map->y + image_y, map->ptr, map->stride);
+   } else {
+      DBG("%s: %d,%d %dx%d from mt %p = %p/%d\n", __FUNCTION__,
+         map->x, map->y, map->w, map->h,
+         mt, map->ptr, map->stride);
+   }
+}
+
+static void
+intel_miptree_unmap_s8(struct intel_context *intel,
+                      struct intel_mipmap_tree *mt,
+                      struct intel_miptree_map *map,
+                      unsigned int level,
+                      unsigned int slice)
+{
+   if (map->mode & GL_MAP_WRITE_BIT) {
+      unsigned int image_x, image_y;
+      uint8_t *untiled_s8_map = map->ptr;
+      uint8_t *tiled_s8_map = intel_miptree_map_raw(intel, mt);
+
+      intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
+
+      for (uint32_t y = 0; y < map->h; y++) {
+        for (uint32_t x = 0; x < map->w; x++) {
+           ptrdiff_t offset = intel_offset_S8(mt->region->pitch,
+                                              x + map->x,
+                                              y + map->y,
+                                              intel->has_swizzling);
+           tiled_s8_map[offset] = untiled_s8_map[y * map->w + x];
+        }
+      }
+
+      intel_miptree_unmap_raw(intel, mt);
+   }
+
+   free(map->buffer);
+}
+
+static void
+intel_miptree_map_etc(struct intel_context *intel,
+                      struct intel_mipmap_tree *mt,
+                      struct intel_miptree_map *map,
+                      unsigned int level,
+                      unsigned int slice)
+{
+   assert(mt->etc_format != MESA_FORMAT_NONE);
+   if (mt->etc_format == MESA_FORMAT_ETC1_RGB8) {
+      assert(mt->format == MESA_FORMAT_RGBX8888_REV);
+   }
+
+   assert(map->mode & GL_MAP_WRITE_BIT);
+   assert(map->mode & GL_MAP_INVALIDATE_RANGE_BIT);
+
+   map->stride = _mesa_format_row_stride(mt->etc_format, map->w);
+   map->buffer = malloc(_mesa_format_image_size(mt->etc_format,
+                                                map->w, map->h, 1));
+   map->ptr = map->buffer;
+}
+
+static void
+intel_miptree_unmap_etc(struct intel_context *intel,
+                        struct intel_mipmap_tree *mt,
+                        struct intel_miptree_map *map,
+                        unsigned int level,
+                        unsigned int slice)
+{
+   uint32_t image_x;
+   uint32_t image_y;
+   intel_miptree_get_image_offset(mt, level, slice, &image_x, &image_y);
+
+   image_x += map->x;
+   image_y += map->y;
+
+   uint8_t *dst = intel_miptree_map_raw(intel, mt)
+                + image_y * mt->region->pitch
+                + image_x * mt->region->cpp;
+
+   if (mt->etc_format == MESA_FORMAT_ETC1_RGB8)
+      _mesa_etc1_unpack_rgba8888(dst, mt->region->pitch,
+                                 map->ptr, map->stride,
+                                 map->w, map->h);
+   else
+      _mesa_unpack_etc2_format(dst, mt->region->pitch,
+                               map->ptr, map->stride,
+                               map->w, map->h, mt->etc_format);
+
+   intel_miptree_unmap_raw(intel, mt);
+   free(map->buffer);
+}
+
+/**
+ * Mapping function for packed depth/stencil miptrees backed by real separate
+ * miptrees for depth and stencil.
+ *
+ * On gen7, and to support HiZ pre-gen7, we have to have the stencil buffer
+ * separate from the depth buffer.  Yet at the GL API level, we have to expose
+ * packed depth/stencil textures and FBO attachments, and Mesa core expects to
+ * be able to map that memory for texture storage and glReadPixels-type
+ * operations.  We give Mesa core that access by mallocing a temporary and
+ * copying the data between the actual backing store and the temporary.
+ */
+static void
+intel_miptree_map_depthstencil(struct intel_context *intel,
+                              struct intel_mipmap_tree *mt,
+                              struct intel_miptree_map *map,
+                              unsigned int level, unsigned int slice)
+{
+   struct intel_mipmap_tree *z_mt = mt;
+   struct intel_mipmap_tree *s_mt = mt->stencil_mt;
+   bool map_z32f_x24s8 = mt->format == MESA_FORMAT_Z32_FLOAT;
+   int packed_bpp = map_z32f_x24s8 ? 8 : 4;
+
+   map->stride = map->w * packed_bpp;
+   map->buffer = map->ptr = malloc(map->stride * map->h);
+   if (!map->buffer)
+      return;
+
+   /* One of either READ_BIT or WRITE_BIT or both is set.  READ_BIT implies no
+    * INVALIDATE_RANGE_BIT.  WRITE_BIT needs the original values read in unless
+    * invalidate is set, since we'll be writing the whole rectangle from our
+    * temporary buffer back out.
+    */
+   if (!(map->mode & GL_MAP_INVALIDATE_RANGE_BIT)) {
+      uint32_t *packed_map = map->ptr;
+      uint8_t *s_map = intel_miptree_map_raw(intel, s_mt);
+      uint32_t *z_map = intel_miptree_map_raw(intel, z_mt);
+      unsigned int s_image_x, s_image_y;
+      unsigned int z_image_x, z_image_y;
+
+      intel_miptree_get_image_offset(s_mt, level, slice,
+                                    &s_image_x, &s_image_y);
+      intel_miptree_get_image_offset(z_mt, level, slice,
+                                    &z_image_x, &z_image_y);
+
+      for (uint32_t y = 0; y < map->h; y++) {
+        for (uint32_t x = 0; x < map->w; x++) {
+           int map_x = map->x + x, map_y = map->y + y;
+           ptrdiff_t s_offset = intel_offset_S8(s_mt->region->pitch,
+                                                map_x + s_image_x,
+                                                map_y + s_image_y,
+                                                intel->has_swizzling);
+           ptrdiff_t z_offset = ((map_y + z_image_y) *
+                                  (z_mt->region->pitch / 4) +
+                                 (map_x + z_image_x));
+           uint8_t s = s_map[s_offset];
+           uint32_t z = z_map[z_offset];
+
+           if (map_z32f_x24s8) {
+              packed_map[(y * map->w + x) * 2 + 0] = z;
+              packed_map[(y * map->w + x) * 2 + 1] = s;
+           } else {
+              packed_map[y * map->w + x] = (s << 24) | (z & 0x00ffffff);
+           }
+        }
+      }
+
+      intel_miptree_unmap_raw(intel, s_mt);
+      intel_miptree_unmap_raw(intel, z_mt);
+
+      DBG("%s: %d,%d %dx%d from z mt %p %d,%d, s mt %p %d,%d = %p/%d\n",
+         __FUNCTION__,
+         map->x, map->y, map->w, map->h,
+         z_mt, map->x + z_image_x, map->y + z_image_y,
+         s_mt, map->x + s_image_x, map->y + s_image_y,
+         map->ptr, map->stride);
+   } else {
+      DBG("%s: %d,%d %dx%d from mt %p = %p/%d\n", __FUNCTION__,
+         map->x, map->y, map->w, map->h,
+         mt, map->ptr, map->stride);
+   }
+}
+
+static void
+intel_miptree_unmap_depthstencil(struct intel_context *intel,
+                                struct intel_mipmap_tree *mt,
+                                struct intel_miptree_map *map,
+                                unsigned int level,
+                                unsigned int slice)
+{
+   struct intel_mipmap_tree *z_mt = mt;
+   struct intel_mipmap_tree *s_mt = mt->stencil_mt;
+   bool map_z32f_x24s8 = mt->format == MESA_FORMAT_Z32_FLOAT;
+
+   if (map->mode & GL_MAP_WRITE_BIT) {
+      uint32_t *packed_map = map->ptr;
+      uint8_t *s_map = intel_miptree_map_raw(intel, s_mt);
+      uint32_t *z_map = intel_miptree_map_raw(intel, z_mt);
+      unsigned int s_image_x, s_image_y;
+      unsigned int z_image_x, z_image_y;
+
+      intel_miptree_get_image_offset(s_mt, level, slice,
+                                    &s_image_x, &s_image_y);
+      intel_miptree_get_image_offset(z_mt, level, slice,
+                                    &z_image_x, &z_image_y);
+
+      for (uint32_t y = 0; y < map->h; y++) {
+        for (uint32_t x = 0; x < map->w; x++) {
+           ptrdiff_t s_offset = intel_offset_S8(s_mt->region->pitch,
+                                                x + s_image_x + map->x,
+                                                y + s_image_y + map->y,
+                                                intel->has_swizzling);
+           ptrdiff_t z_offset = ((y + z_image_y) *
+                                  (z_mt->region->pitch / 4) +
+                                 (x + z_image_x));
+
+           if (map_z32f_x24s8) {
+              z_map[z_offset] = packed_map[(y * map->w + x) * 2 + 0];
+              s_map[s_offset] = packed_map[(y * map->w + x) * 2 + 1];
+           } else {
+              uint32_t packed = packed_map[y * map->w + x];
+              s_map[s_offset] = packed >> 24;
+              z_map[z_offset] = packed;
+           }
+        }
+      }
+
+      intel_miptree_unmap_raw(intel, s_mt);
+      intel_miptree_unmap_raw(intel, z_mt);
+
+      DBG("%s: %d,%d %dx%d from z mt %p (%s) %d,%d, s mt %p %d,%d = %p/%d\n",
+         __FUNCTION__,
+         map->x, map->y, map->w, map->h,
+         z_mt, _mesa_get_format_name(z_mt->format),
+         map->x + z_image_x, map->y + z_image_y,
+         s_mt, map->x + s_image_x, map->y + s_image_y,
+         map->ptr, map->stride);
+   }
+
+   free(map->buffer);
+}
+
+/**
+ * Create and attach a map to the miptree at (level, slice). Return the
+ * attached map.
+ */
+static struct intel_miptree_map*
+intel_miptree_attach_map(struct intel_mipmap_tree *mt,
+                         unsigned int level,
+                         unsigned int slice,
+                         unsigned int x,
+                         unsigned int y,
+                         unsigned int w,
+                         unsigned int h,
+                         GLbitfield mode)
+{
+   struct intel_miptree_map *map = calloc(1, sizeof(*map));
+
+   if (!map)
+      return NULL;
+
+   assert(mt->level[level].slice[slice].map == NULL);
+   mt->level[level].slice[slice].map = map;
+
+   map->mode = mode;
+   map->x = x;
+   map->y = y;
+   map->w = w;
+   map->h = h;
+
+   return map;
+}
+
+/**
+ * Release the map at (level, slice).
+ */
+static void
+intel_miptree_release_map(struct intel_mipmap_tree *mt,
+                         unsigned int level,
+                         unsigned int slice)
+{
+   struct intel_miptree_map **map;
+
+   map = &mt->level[level].slice[slice].map;
+   free(*map);
+   *map = NULL;
+}
+
+void
+intel_miptree_map(struct intel_context *intel,
+                  struct intel_mipmap_tree *mt,
+                  unsigned int level,
+                  unsigned int slice,
+                  unsigned int x,
+                  unsigned int y,
+                  unsigned int w,
+                  unsigned int h,
+                  GLbitfield mode,
+                  void **out_ptr,
+                  int *out_stride)
+{
+   struct intel_miptree_map *map;
+
+   map = intel_miptree_attach_map(mt, level, slice, x, y, w, h, mode);
+   if (!map){
+      *out_ptr = NULL;
+      *out_stride = 0;
+      return;
+   }
+
+   if (mt->format == MESA_FORMAT_S8) {
+      intel_miptree_map_s8(intel, mt, map, level, slice);
+   } else if (mt->etc_format != MESA_FORMAT_NONE &&
+              !(mode & BRW_MAP_DIRECT_BIT)) {
+      intel_miptree_map_etc(intel, mt, map, level, slice);
+   } else if (mt->stencil_mt && !(mode & BRW_MAP_DIRECT_BIT)) {
+      intel_miptree_map_depthstencil(intel, mt, map, level, slice);
+   }
+   /* See intel_miptree_blit() for details on the 32k pitch limit. */
+   else if (intel->has_llc &&
+            !(mode & GL_MAP_WRITE_BIT) &&
+            !mt->compressed &&
+            (mt->region->tiling == I915_TILING_X ||
+             (intel->gen >= 6 && mt->region->tiling == I915_TILING_Y)) &&
+            mt->region->pitch < 32768) {
+      intel_miptree_map_blit(intel, mt, map, level, slice);
+   } else if (mt->region->tiling != I915_TILING_NONE &&
+              mt->region->bo->size >= intel->max_gtt_map_object_size) {
+      assert(mt->region->pitch < 32768);
+      intel_miptree_map_blit(intel, mt, map, level, slice);
+   } else {
+      intel_miptree_map_gtt(intel, mt, map, level, slice);
+   }
+
+   *out_ptr = map->ptr;
+   *out_stride = map->stride;
+
+   if (map->ptr == NULL)
+      intel_miptree_release_map(mt, level, slice);
+}
+
+void
+intel_miptree_unmap(struct intel_context *intel,
+                    struct intel_mipmap_tree *mt,
+                    unsigned int level,
+                    unsigned int slice)
+{
+   struct intel_miptree_map *map = mt->level[level].slice[slice].map;
+
+   if (!map)
+      return;
+
+   DBG("%s: mt %p (%s) level %d slice %d\n", __FUNCTION__,
+       mt, _mesa_get_format_name(mt->format), level, slice);
+
+   if (mt->format == MESA_FORMAT_S8) {
+      intel_miptree_unmap_s8(intel, mt, map, level, slice);
+   } else if (mt->etc_format != MESA_FORMAT_NONE &&
+              !(map->mode & BRW_MAP_DIRECT_BIT)) {
+      intel_miptree_unmap_etc(intel, mt, map, level, slice);
+   } else if (mt->stencil_mt && !(map->mode & BRW_MAP_DIRECT_BIT)) {
+      intel_miptree_unmap_depthstencil(intel, mt, map, level, slice);
+   } else if (map->mt) {
+      intel_miptree_unmap_blit(intel, mt, map, level, slice);
+   } else {
+      intel_miptree_unmap_gtt(intel, mt, map, level, slice);
+   }
+
+   intel_miptree_release_map(mt, level, slice);
+}