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      1 /*
      2  * Copyright 2003 VMware, Inc.
      3  * All Rights Reserved.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sublicense, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  */
     25 
     26 #include "main/bufferobj.h"
     27 #include "main/image.h"
     28 #include "main/macros.h"
     29 #include "main/mtypes.h"
     30 #include "main/pbo.h"
     31 #include "main/texobj.h"
     32 #include "main/texstore.h"
     33 #include "main/texcompress.h"
     34 #include "main/enums.h"
     35 #include "drivers/common/meta.h"
     36 
     37 #include "brw_context.h"
     38 #include "intel_batchbuffer.h"
     39 #include "intel_tex.h"
     40 #include "intel_mipmap_tree.h"
     41 #include "intel_blit.h"
     42 #include "intel_tiled_memcpy.h"
     43 
     44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
     45 
     46 /**
     47  * \brief A fast path for glTexImage and glTexSubImage.
     48  *
     49  * \param for_glTexImage Was this called from glTexImage or glTexSubImage?
     50  *
     51  * This fast path is taken when the texture format is BGRA, RGBA,
     52  * A or L and when the texture memory is X- or Y-tiled.  It uploads
     53  * the texture data by mapping the texture memory without a GTT fence, thus
     54  * acquiring a tiled view of the memory, and then copying sucessive
     55  * spans within each tile.
     56  *
     57  * This is a performance win over the conventional texture upload path because
     58  * it avoids the performance penalty of writing through the write-combine
     59  * buffer. In the conventional texture upload path,
     60  * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT
     61  * fence, thus acquiring a linear view of the memory, then each row in the
     62  * image is memcpy'd. In this fast path, we replace each row's copy with
     63  * a sequence of copies over each linear span in tile.
     64  *
     65  * One use case is Google Chrome's paint rectangles.  Chrome (as
     66  * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures.
     67  * Each page's content is initially uploaded with glTexImage2D and damaged
     68  * regions are updated with glTexSubImage2D. On some workloads, the
     69  * performance gain of this fastpath on Sandybridge is over 5x.
     70  */
     71 bool
     72 intel_texsubimage_tiled_memcpy(struct gl_context * ctx,
     73                                GLuint dims,
     74                                struct gl_texture_image *texImage,
     75                                GLint xoffset, GLint yoffset, GLint zoffset,
     76                                GLsizei width, GLsizei height, GLsizei depth,
     77                                GLenum format, GLenum type,
     78                                const GLvoid *pixels,
     79                                const struct gl_pixelstore_attrib *packing,
     80                                bool for_glTexImage)
     81 {
     82    struct brw_context *brw = brw_context(ctx);
     83    struct intel_texture_image *image = intel_texture_image(texImage);
     84    int src_pitch;
     85 
     86    /* The miptree's buffer. */
     87    drm_intel_bo *bo;
     88 
     89    int error = 0;
     90 
     91    uint32_t cpp;
     92    mem_copy_fn mem_copy = NULL;
     93 
     94    /* This fastpath is restricted to specific texture types:
     95     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
     96     * more types.
     97     *
     98     * FINISHME: The restrictions below on packing alignment and packing row
     99     * length are likely unneeded now because we calculate the source stride
    100     * with _mesa_image_row_stride. However, before removing the restrictions
    101     * we need tests.
    102     */
    103    if (!brw->has_llc ||
    104        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
    105        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
    106          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
    107        pixels == NULL ||
    108        _mesa_is_bufferobj(packing->BufferObj) ||
    109        packing->Alignment > 4 ||
    110        packing->SkipPixels > 0 ||
    111        packing->SkipRows > 0 ||
    112        (packing->RowLength != 0 && packing->RowLength != width) ||
    113        packing->SwapBytes ||
    114        packing->LsbFirst ||
    115        packing->Invert)
    116       return false;
    117 
    118    /* Only a simple blit, no scale, bias or other mapping. */
    119    if (ctx->_ImageTransferState)
    120       return false;
    121 
    122    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
    123       return false;
    124 
    125    /* If this is a nontrivial texture view, let another path handle it instead. */
    126    if (texImage->TexObject->MinLayer)
    127       return false;
    128 
    129    if (for_glTexImage)
    130       ctx->Driver.AllocTextureImageBuffer(ctx, texImage);
    131 
    132    if (!image->mt ||
    133        (image->mt->tiling != I915_TILING_X &&
    134        image->mt->tiling != I915_TILING_Y)) {
    135       /* The algorithm is written only for X- or Y-tiled memory. */
    136       return false;
    137    }
    138 
    139    /* Since we are going to write raw data to the miptree, we need to resolve
    140     * any pending fast color clears before we start.
    141     */
    142    intel_miptree_all_slices_resolve_color(brw, image->mt, 0);
    143 
    144    bo = image->mt->bo;
    145 
    146    if (drm_intel_bo_references(brw->batch.bo, bo)) {
    147       perf_debug("Flushing before mapping a referenced bo.\n");
    148       intel_batchbuffer_flush(brw);
    149    }
    150 
    151    error = brw_bo_map(brw, bo, true /* write enable */, "miptree");
    152    if (error || bo->virtual == NULL) {
    153       DBG("%s: failed to map bo\n", __func__);
    154       return false;
    155    }
    156 
    157    src_pitch = _mesa_image_row_stride(packing, width, format, type);
    158 
    159    /* We postponed printing this message until having committed to executing
    160     * the function.
    161     */
    162    DBG("%s: level=%d offset=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
    163        "mesa_format=0x%x tiling=%d "
    164        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d) "
    165        "for_glTexImage=%d\n",
    166        __func__, texImage->Level, xoffset, yoffset, width, height,
    167        format, type, texImage->TexFormat, image->mt->tiling,
    168        packing->Alignment, packing->RowLength, packing->SkipPixels,
    169        packing->SkipRows, for_glTexImage);
    170 
    171    int level = texImage->Level + texImage->TexObject->MinLevel;
    172 
    173    /* Adjust x and y offset based on miplevel */
    174    xoffset += image->mt->level[level].level_x;
    175    yoffset += image->mt->level[level].level_y;
    176 
    177    linear_to_tiled(
    178       xoffset * cpp, (xoffset + width) * cpp,
    179       yoffset, yoffset + height,
    180       bo->virtual,
    181       pixels - (ptrdiff_t) yoffset * src_pitch - (ptrdiff_t) xoffset * cpp,
    182       image->mt->pitch, src_pitch,
    183       brw->has_swizzling,
    184       image->mt->tiling,
    185       mem_copy
    186    );
    187 
    188    drm_intel_bo_unmap(bo);
    189    return true;
    190 }
    191 
    192 static void
    193 intelTexSubImage(struct gl_context * ctx,
    194                  GLuint dims,
    195                  struct gl_texture_image *texImage,
    196                  GLint xoffset, GLint yoffset, GLint zoffset,
    197                  GLsizei width, GLsizei height, GLsizei depth,
    198                  GLenum format, GLenum type,
    199                  const GLvoid * pixels,
    200                  const struct gl_pixelstore_attrib *packing)
    201 {
    202    struct intel_mipmap_tree *mt = intel_texture_image(texImage)->mt;
    203    bool ok;
    204 
    205    bool tex_busy = mt && drm_intel_bo_busy(mt->bo);
    206 
    207    if (mt && mt->format == MESA_FORMAT_S_UINT8)
    208       mt->r8stencil_needs_update = true;
    209 
    210    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
    211        __func__, _mesa_get_format_name(texImage->TexFormat),
    212        _mesa_enum_to_string(texImage->TexObject->Target),
    213        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
    214        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
    215 
    216    ok = _mesa_meta_pbo_TexSubImage(ctx, dims, texImage,
    217                                    xoffset, yoffset, zoffset,
    218                                    width, height, depth, format, type,
    219                                    pixels, tex_busy, packing);
    220    if (ok)
    221       return;
    222 
    223    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
    224                                        xoffset, yoffset, zoffset,
    225                                        width, height, depth,
    226                                        format, type, pixels, packing,
    227                                        false /*for_glTexImage*/);
    228    if (ok)
    229      return;
    230 
    231    _mesa_store_texsubimage(ctx, dims, texImage,
    232                            xoffset, yoffset, zoffset,
    233                            width, height, depth,
    234                            format, type, pixels, packing);
    235 }
    236 
    237 void
    238 intelInitTextureSubImageFuncs(struct dd_function_table *functions)
    239 {
    240    functions->TexSubImage = intelTexSubImage;
    241 }
    242