src/intel/isl/isl_storage_image.c

   1 /*
   2  * Copyright 2015 Intel Corporation
   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 #include "isl_priv.h"
  25 #include "compiler/brw_compiler.h"
  26
  27 bool
  28 isl_is_storage_image_format(enum isl_format format)
  29 {
  30    /* XXX: Maybe we should put this in the CSV? */
  31
  32    switch (format) {
  33    case ISL_FORMAT_R32G32B32A32_UINT:
  34    case ISL_FORMAT_R32G32B32A32_SINT:
  35    case ISL_FORMAT_R32G32B32A32_FLOAT:
  36    case ISL_FORMAT_R32_UINT:
  37    case ISL_FORMAT_R32_SINT:
  38    case ISL_FORMAT_R32_FLOAT:
  39    case ISL_FORMAT_R16G16B16A16_UINT:
  40    case ISL_FORMAT_R16G16B16A16_SINT:
  41    case ISL_FORMAT_R16G16B16A16_FLOAT:
  42    case ISL_FORMAT_R32G32_UINT:
  43    case ISL_FORMAT_R32G32_SINT:
  44    case ISL_FORMAT_R32G32_FLOAT:
  45    case ISL_FORMAT_R8G8B8A8_UINT:
  46    case ISL_FORMAT_R8G8B8A8_SINT:
  47    case ISL_FORMAT_R16G16_UINT:
  48    case ISL_FORMAT_R16G16_SINT:
  49    case ISL_FORMAT_R16G16_FLOAT:
  50    case ISL_FORMAT_R8G8_UINT:
  51    case ISL_FORMAT_R8G8_SINT:
  52    case ISL_FORMAT_R16_UINT:
  53    case ISL_FORMAT_R16_FLOAT:
  54    case ISL_FORMAT_R16_SINT:
  55    case ISL_FORMAT_R8_UINT:
  56    case ISL_FORMAT_R8_SINT:
  57    case ISL_FORMAT_R10G10B10A2_UINT:
  58    case ISL_FORMAT_R10G10B10A2_UNORM:
  59    case ISL_FORMAT_R11G11B10_FLOAT:
  60    case ISL_FORMAT_R16G16B16A16_UNORM:
  61    case ISL_FORMAT_R16G16B16A16_SNORM:
  62    case ISL_FORMAT_R8G8B8A8_UNORM:
  63    case ISL_FORMAT_R8G8B8A8_SNORM:
  64    case ISL_FORMAT_R16G16_UNORM:
  65    case ISL_FORMAT_R16G16_SNORM:
  66    case ISL_FORMAT_R8G8_UNORM:
  67    case ISL_FORMAT_R8G8_SNORM:
  68    case ISL_FORMAT_R16_UNORM:
  69    case ISL_FORMAT_R16_SNORM:
  70    case ISL_FORMAT_R8_UNORM:
  71    case ISL_FORMAT_R8_SNORM:
  72       return true;
  73    default:
  74       return false;
  75    }
  76 }
  77
  78 enum isl_format
  79 isl_lower_storage_image_format(const struct gen_device_info *devinfo,
  80                                enum isl_format format)
  81 {
  82    switch (format) {
  83    /* These are never lowered.  Up to BDW we'll have to fall back to untyped
  84     * surface access for 128bpp formats.
  85     */
  86    case ISL_FORMAT_R32G32B32A32_UINT:
  87    case ISL_FORMAT_R32G32B32A32_SINT:
  88    case ISL_FORMAT_R32G32B32A32_FLOAT:
  89    case ISL_FORMAT_R32_UINT:
  90    case ISL_FORMAT_R32_SINT:
  91       return format;
  92
  93    /* The Skylake PRM's "Surface Formats" section says:
  94     *
  95     *   "The surface format for the typed atomic integer operations must
  96     *    be R32_UINT or R32_SINT."
  97     */
  98    case ISL_FORMAT_R32_FLOAT:
  99       return ISL_FORMAT_R32_UINT;
 100
 101    /* From HSW to BDW the only 64bpp format supported for typed access is
 102     * RGBA_UINT16.  IVB falls back to untyped.
 103     */
 104    case ISL_FORMAT_R16G16B16A16_UINT:
 105    case ISL_FORMAT_R16G16B16A16_SINT:
 106    case ISL_FORMAT_R16G16B16A16_FLOAT:
 107    case ISL_FORMAT_R32G32_UINT:
 108    case ISL_FORMAT_R32G32_SINT:
 109    case ISL_FORMAT_R32G32_FLOAT:
 110       return (devinfo->gen >= 9 ? format :
 111               devinfo->gen >= 8 || devinfo->is_haswell ?
 112               ISL_FORMAT_R16G16B16A16_UINT :
 113               ISL_FORMAT_R32G32_UINT);
 114
 115    /* Up to BDW no SINT or FLOAT formats of less than 32 bits per component
 116     * are supported.  IVB doesn't support formats with more than one component
 117     * for typed access.  For 8 and 16 bpp formats IVB relies on the
 118     * undocumented behavior that typed reads from R_UINT8 and R_UINT16
 119     * surfaces actually do a 32-bit misaligned read.  The alternative would be
 120     * to use two surface state entries with different formats for each image,
 121     * one for reading (using R_UINT32) and another one for writing (using
 122     * R_UINT8 or R_UINT16), but that would complicate the shaders we generate
 123     * even more.
 124     */
 125    case ISL_FORMAT_R8G8B8A8_UINT:
 126    case ISL_FORMAT_R8G8B8A8_SINT:
 127       return (devinfo->gen >= 9 ? format :
 128               devinfo->gen >= 8 || devinfo->is_haswell ?
 129               ISL_FORMAT_R8G8B8A8_UINT : ISL_FORMAT_R32_UINT);
 130
 131    case ISL_FORMAT_R16G16_UINT:
 132    case ISL_FORMAT_R16G16_SINT:
 133    case ISL_FORMAT_R16G16_FLOAT:
 134       return (devinfo->gen >= 9 ? format :
 135               devinfo->gen >= 8 || devinfo->is_haswell ?
 136               ISL_FORMAT_R16G16_UINT : ISL_FORMAT_R32_UINT);
 137
 138    case ISL_FORMAT_R8G8_UINT:
 139    case ISL_FORMAT_R8G8_SINT:
 140       return (devinfo->gen >= 9 ? format :
 141               devinfo->gen >= 8 || devinfo->is_haswell ?
 142               ISL_FORMAT_R8G8_UINT : ISL_FORMAT_R16_UINT);
 143
 144    case ISL_FORMAT_R16_UINT:
 145    case ISL_FORMAT_R16_FLOAT:
 146    case ISL_FORMAT_R16_SINT:
 147       return (devinfo->gen >= 9 ? format : ISL_FORMAT_R16_UINT);
 148
 149    case ISL_FORMAT_R8_UINT:
 150    case ISL_FORMAT_R8_SINT:
 151       return (devinfo->gen >= 9 ? format : ISL_FORMAT_R8_UINT);
 152
 153    /* Neither the 2/10/10/10 nor the 11/11/10 packed formats are supported
 154     * by the hardware.
 155     */
 156    case ISL_FORMAT_R10G10B10A2_UINT:
 157    case ISL_FORMAT_R10G10B10A2_UNORM:
 158    case ISL_FORMAT_R11G11B10_FLOAT:
 159       return ISL_FORMAT_R32_UINT;
 160
 161    /* No normalized fixed-point formats are supported by the hardware. */
 162    case ISL_FORMAT_R16G16B16A16_UNORM:
 163    case ISL_FORMAT_R16G16B16A16_SNORM:
 164       return (devinfo->gen >= 11 ? format :
 165               devinfo->gen >= 8 || devinfo->is_haswell ?
 166               ISL_FORMAT_R16G16B16A16_UINT :
 167               ISL_FORMAT_R32G32_UINT);
 168
 169    case ISL_FORMAT_R8G8B8A8_UNORM:
 170    case ISL_FORMAT_R8G8B8A8_SNORM:
 171       return (devinfo->gen >= 11 ? format :
 172               devinfo->gen >= 8 || devinfo->is_haswell ?
 173               ISL_FORMAT_R8G8B8A8_UINT : ISL_FORMAT_R32_UINT);
 174
 175    case ISL_FORMAT_R16G16_UNORM:
 176    case ISL_FORMAT_R16G16_SNORM:
 177       return (devinfo->gen >= 11 ? format :
 178               devinfo->gen >= 8 || devinfo->is_haswell ?
 179               ISL_FORMAT_R16G16_UINT : ISL_FORMAT_R32_UINT);
 180
 181    case ISL_FORMAT_R8G8_UNORM:
 182    case ISL_FORMAT_R8G8_SNORM:
 183       return (devinfo->gen >= 11 ? format :
 184               devinfo->gen >= 8 || devinfo->is_haswell ?
 185               ISL_FORMAT_R8G8_UINT : ISL_FORMAT_R16_UINT);
 186
 187    case ISL_FORMAT_R16_UNORM:
 188    case ISL_FORMAT_R16_SNORM:
 189       return (devinfo->gen >= 11 ? format : ISL_FORMAT_R16_UINT);
 190
 191    case ISL_FORMAT_R8_UNORM:
 192    case ISL_FORMAT_R8_SNORM:
 193       return (devinfo->gen >= 11 ? format : ISL_FORMAT_R8_UINT);
 194
 195    default:
 196       assert(!"Unknown image format");
 197       return ISL_FORMAT_UNSUPPORTED;
 198    }
 199 }
 200
 201 bool
 202 isl_has_matching_typed_storage_image_format(const struct gen_device_info *devinfo,
 203                                             enum isl_format fmt)
 204 {
 205    if (devinfo->gen >= 9) {
 206       return true;
 207    } else if (devinfo->gen >= 8 || devinfo->is_haswell) {
 208       return isl_format_get_layout(fmt)->bpb <= 64;
 209    } else {
 210       return isl_format_get_layout(fmt)->bpb <= 32;
 211    }
 212 }
 213
 214 static const struct brw_image_param image_param_defaults = {
 215    /* Set the swizzling shifts to all-ones to effectively disable
 216     * swizzling -- See emit_address_calculation() in
 217     * brw_fs_surface_builder.cpp for a more detailed explanation of
 218     * these parameters.
 219     */
 220    .swizzling = { 0xff, 0xff },
 221 };
 222
 223 void
 224 isl_surf_fill_image_param(const struct isl_device *dev,
 225                           struct brw_image_param *param,
 226                           const struct isl_surf *surf,
 227                           const struct isl_view *view)
 228 {
 229    *param = image_param_defaults;
 230
 231    param->size[0] = isl_minify(surf->logical_level0_px.w, view->base_level);
 232    param->size[1] = isl_minify(surf->logical_level0_px.h, view->base_level);
 233    if (surf->dim == ISL_SURF_DIM_3D) {
 234       param->size[2] = isl_minify(surf->logical_level0_px.d, view->base_level);
 235    } else {
 236       param->size[2] = surf->logical_level0_px.array_len -
 237                        view->base_array_layer;
 238    }
 239
 240    isl_surf_get_image_offset_el(surf, view->base_level,
 241                                 surf->dim == ISL_SURF_DIM_3D ?
 242                                    0 : view->base_array_layer,
 243                                 surf->dim == ISL_SURF_DIM_3D ?
 244                                    view->base_array_layer : 0,
 245                                 &param->offset[0],  &param->offset[1]);
 246
 247    const int cpp = isl_format_get_layout(surf->format)->bpb / 8;
 248    param->stride[0] = cpp;
 249    param->stride[1] = surf->row_pitch / cpp;
 250
 251    const struct isl_extent3d image_align_sa =
 252       isl_surf_get_image_alignment_sa(surf);
 253    if (ISL_DEV_GEN(dev) < 9 && surf->dim == ISL_SURF_DIM_3D) {
 254       param->stride[2] = isl_align_npot(param->size[0], image_align_sa.w);
 255       param->stride[3] = isl_align_npot(param->size[1], image_align_sa.h);
 256    } else {
 257       param->stride[2] = 0;
 258       param->stride[3] = isl_surf_get_array_pitch_el_rows(surf);
 259    }
 260
 261    switch (surf->tiling) {
 262    case ISL_TILING_LINEAR:
 263       /* image_param_defaults is good enough */
 264       break;
 265
 266    case ISL_TILING_X:
 267       /* An X tile is a rectangular block of 512x8 bytes. */
 268       param->tiling[0] = isl_log2u(512 / cpp);
 269       param->tiling[1] = isl_log2u(8);
 270
 271       if (dev->has_bit6_swizzling) {
 272          /* Right shifts required to swizzle bits 9 and 10 of the memory
 273           * address with bit 6.
 274           */
 275          param->swizzling[0] = 3;
 276          param->swizzling[1] = 4;
 277       }
 278       break;
 279
 280    case ISL_TILING_Y0:
 281       /* The layout of a Y-tiled surface in memory isn't really fundamentally
 282        * different to the layout of an X-tiled surface, we simply pretend that
 283        * the surface is broken up in a number of smaller 16Bx32 tiles, each
 284        * one arranged in X-major order just like is the case for X-tiling.
 285        */
 286       param->tiling[0] = isl_log2u(16 / cpp);
 287       param->tiling[1] = isl_log2u(32);
 288
 289       if (dev->has_bit6_swizzling) {
 290          /* Right shift required to swizzle bit 9 of the memory address with
 291           * bit 6.
 292           */
 293          param->swizzling[0] = 3;
 294          param->swizzling[1] = 0xff;
 295       }
 296       break;
 297
 298    default:
 299       assert(!"Unhandled storage image tiling");
 300    }
 301
 302    /* 3D textures are arranged in 2D in memory with 2^lod slices per row.  The
 303     * address calculation algorithm (emit_address_calculation() in
 304     * brw_fs_surface_builder.cpp) handles this as a sort of tiling with
 305     * modulus equal to the LOD.
 306     */
 307    param->tiling[2] = (ISL_DEV_GEN(dev) < 9 && surf->dim == ISL_SURF_DIM_3D ?
 308                        view->base_level : 0);
 309 }
 310
 311 void
 312 isl_buffer_fill_image_param(const struct isl_device *dev,
 313                             struct brw_image_param *param,
 314                             enum isl_format format,
 315                             uint64_t size)
 316 {
 317    *param = image_param_defaults;
 318
 319    param->stride[0] = isl_format_get_layout(format)->bpb / 8;
 320    param->size[0] = size / param->stride[0];
 321 }