src/freedreno/fdl/freedreno_layout.h

   1 /*
   2  * Copyright © 2019 Google, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef FREEDRENO_LAYOUT_H_
  25 #define FREEDRENO_LAYOUT_H_
  26
  27 #include <stdbool.h>
  28 #include <stdint.h>
  29
  30 #include "util/u_debug.h"
  31 #include "util/u_math.h"
  32 #include "util/format/u_format.h"
  33
  34 /* Shared freedreno mipmap layout helper
  35  *
  36  * It does *not* attempt to track surface transitions, in particular
  37  * about UBWC state.  Possibly it should, but
  38  *  (a) I'm not sure if in all cases we can transparently do in-
  39  *      place transitions (ie. a5xx textures with interleaved
  40  *      meta and pixel data
  41  *  (b) Even if we can, we probably can't assume that we have
  42  *      figured out yet how to do in-place transition for every
  43  *      generation.
  44  */
  45
  46 /* Texture Layout on a3xx:
  47  * -----------------------
  48  *
  49  * Each mipmap-level contains all of it's layers (ie. all cubmap
  50  * faces, all 1d/2d array elements, etc).  The texture sampler is
  51  * programmed with the start address of each mipmap level, and hw
  52  * derives the layer offset within the level.
  53  *
  54  *
  55  * Texture Layout on a4xx+:
  56  * -----------------------
  57  *
  58  * For cubemap and 2d array, each layer contains all of it's mipmap
  59  * levels (layer_first layout).
  60  *
  61  * 3d textures are laid out as on a3xx.
  62  *
  63  * In either case, the slice represents the per-miplevel information,
  64  * but in layer_first layout it only includes the first layer, and
  65  * an additional offset of (rsc->layer_size * layer) must be added.
  66  *
  67  *
  68  * UBWC Color Compressions (a5xx+):
  69  * -------------------------------
  70  *
  71  * Color compression is only supported for tiled layouts.  In general
  72  * the meta "flag" buffer (ie. what holds the compression state for
  73  * each block) can be separate from the color data, except for textures
  74  * on a5xx where it needs to be interleaved with layers/levels of a
  75  * texture.
  76  */
  77
  78 #define FDL_MAX_MIP_LEVELS 14
  79
  80 struct fdl_slice {
  81         uint32_t offset;         /* offset of first layer in slice */
  82         uint32_t pitch;
  83         uint32_t size0;          /* size of first layer in slice */
  84 };
  85
  86 /**
  87  * Encapsulates the layout of a resource, including position of given 2d
  88  * surface (layer, level) within.  Or rather all the information needed
  89  * to derive this.
  90  */
  91 struct fdl_layout {
  92         struct fdl_slice slices[FDL_MAX_MIP_LEVELS];
  93         struct fdl_slice ubwc_slices[FDL_MAX_MIP_LEVELS];
  94         uint32_t layer_size;
  95         uint32_t ubwc_layer_size; /* in bytes */
  96         bool layer_first : 1;    /* see above description */
  97
  98         /* Note that for tiled textures, beyond a certain mipmap level (ie.
  99          * when width is less than block size) things switch to linear.  In
 100          * general you should not directly look at fdl_layout::tile_mode,
 101          * but instead use fdl_surface::tile_mode which will correctly take
 102          * this into account.
 103          */
 104         uint32_t tile_mode : 2;
 105         /* Bytes per pixel (where a "pixel" is a single row of a block in the case
 106          * of compression), including each sample in the case of multisample
 107          * layouts.
 108          */
 109         uint8_t cpp;
 110
 111         uint32_t width0, height0, depth0;
 112         uint32_t nr_samples;
 113         enum pipe_format format;
 114
 115         uint32_t size; /* Size of the whole image, in bytes. */
 116 };
 117
 118 static inline uint32_t
 119 fdl_layer_stride(const struct fdl_layout *layout, unsigned level)
 120 {
 121         if (layout->layer_first)
 122                 return layout->layer_size;
 123         else
 124                 return layout->slices[level].size0;
 125 }
 126
 127 static inline uint32_t
 128 fdl_surface_offset(const struct fdl_layout *layout, unsigned level, unsigned layer)
 129 {
 130         const struct fdl_slice *slice = &layout->slices[level];
 131         return slice->offset + fdl_layer_stride(layout, level) * layer;
 132 }
 133
 134 static inline uint32_t
 135 fdl_ubwc_offset(const struct fdl_layout *layout, unsigned level, unsigned layer)
 136 {
 137         /* for now this doesn't do anything clever, but when UBWC is enabled
 138          * for multi layer/level images, it will.
 139          */
 140         if (layout->ubwc_layer_size) {
 141                 assert(level == 0);
 142                 assert(layer == 0);
 143         }
 144         return layout->ubwc_slices[0].offset;
 145 }
 146
 147 static inline bool
 148 fdl_level_linear(const struct fdl_layout *layout, int level)
 149 {
 150         unsigned w = u_minify(layout->width0, level);
 151         if (w < 16)
 152                 return true;
 153         return false;
 154 }
 155
 156 static inline uint32_t
 157 fdl_tile_mode(const struct fdl_layout *layout, int level)
 158 {
 159         if (layout->tile_mode && fdl_level_linear(layout, level))
 160                 return 0; /* linear */
 161         else
 162                 return layout->tile_mode;
 163 }
 164
 165 static inline bool
 166 fdl_ubwc_enabled(const struct fdl_layout *layout, int level)
 167 {
 168         return layout->ubwc_layer_size && fdl_tile_mode(layout, level);
 169 }
 170
 171 void
 172 fdl_layout_buffer(struct fdl_layout *layout, uint32_t size);
 173
 174 void
 175 fdl6_layout(struct fdl_layout *layout,
 176                 enum pipe_format format, uint32_t nr_samples,
 177                 uint32_t width0, uint32_t height0, uint32_t depth0,
 178                 uint32_t mip_levels, uint32_t array_size, bool is_3d, bool ubwc);
 179
 180 void
 181 fdl_dump_layout(struct fdl_layout *layout);
 182
 183 void
 184 fdl6_get_ubwc_blockwidth(struct fdl_layout *layout,
 185                 uint32_t *blockwidth, uint32_t *blockheight);
 186
 187 #endif /* FREEDRENO_LAYOUT_H_ */