src/mesa/drivers/dri/i965/brw_wm_surface_state.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a 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, sublicense, 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
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32
  33 #include "main/mtypes.h"
  34 #include "main/texstore.h"
  35 #include "program/prog_parameter.h"
  36
  37 #include "intel_mipmap_tree.h"
  38 #include "intel_batchbuffer.h"
  39 #include "intel_tex.h"
  40 #include "intel_fbo.h"
  41
  42 #include "brw_context.h"
  43 #include "brw_state.h"
  44 #include "brw_defines.h"
  45 #include "brw_wm.h"
  46
  47 static GLuint translate_tex_target( GLenum target )
  48 {
  49    switch (target) {
  50    case GL_TEXTURE_1D:
  51       return BRW_SURFACE_1D;
  52
  53    case GL_TEXTURE_RECTANGLE_NV:
  54       return BRW_SURFACE_2D;
  55
  56    case GL_TEXTURE_2D:
  57       return BRW_SURFACE_2D;
  58
  59    case GL_TEXTURE_3D:
  60       return BRW_SURFACE_3D;
  61
  62    case GL_TEXTURE_CUBE_MAP:
  63       return BRW_SURFACE_CUBE;
  64
  65    default:
  66       assert(0);
  67       return 0;
  68    }
  69 }
  70
  71 static uint32_t brw_format_for_mesa_format[MESA_FORMAT_COUNT] =
  72 {
  73    [MESA_FORMAT_L8] = BRW_SURFACEFORMAT_L8_UNORM,
  74    [MESA_FORMAT_I8] = BRW_SURFACEFORMAT_I8_UNORM,
  75    [MESA_FORMAT_A8] = BRW_SURFACEFORMAT_A8_UNORM,
  76    [MESA_FORMAT_AL88] = BRW_SURFACEFORMAT_L8A8_UNORM,
  77    [MESA_FORMAT_AL1616] = BRW_SURFACEFORMAT_L16A16_UNORM,
  78    [MESA_FORMAT_R8] = BRW_SURFACEFORMAT_R8_UNORM,
  79    [MESA_FORMAT_R16] = BRW_SURFACEFORMAT_R16_UNORM,
  80    [MESA_FORMAT_RG88] = BRW_SURFACEFORMAT_R8G8_UNORM,
  81    [MESA_FORMAT_RG1616] = BRW_SURFACEFORMAT_R16G16_UNORM,
  82    [MESA_FORMAT_ARGB8888] = BRW_SURFACEFORMAT_B8G8R8A8_UNORM,
  83    [MESA_FORMAT_XRGB8888] = BRW_SURFACEFORMAT_B8G8R8X8_UNORM,
  84    [MESA_FORMAT_RGB565] = BRW_SURFACEFORMAT_B5G6R5_UNORM,
  85    [MESA_FORMAT_ARGB1555] = BRW_SURFACEFORMAT_B5G5R5A1_UNORM,
  86    [MESA_FORMAT_ARGB4444] = BRW_SURFACEFORMAT_B4G4R4A4_UNORM,
  87    [MESA_FORMAT_YCBCR_REV] = BRW_SURFACEFORMAT_YCRCB_NORMAL,
  88    [MESA_FORMAT_YCBCR] = BRW_SURFACEFORMAT_YCRCB_SWAPUVY,
  89    [MESA_FORMAT_RGB_FXT1] = BRW_SURFACEFORMAT_FXT1,
  90    [MESA_FORMAT_RGBA_FXT1] = BRW_SURFACEFORMAT_FXT1,
  91    [MESA_FORMAT_RGB_DXT1] = BRW_SURFACEFORMAT_DXT1_RGB,
  92    [MESA_FORMAT_RGBA_DXT1] = BRW_SURFACEFORMAT_BC1_UNORM,
  93    [MESA_FORMAT_RGBA_DXT3] = BRW_SURFACEFORMAT_BC2_UNORM,
  94    [MESA_FORMAT_RGBA_DXT5] = BRW_SURFACEFORMAT_BC3_UNORM,
  95    [MESA_FORMAT_SRGB_DXT1] = BRW_SURFACEFORMAT_DXT1_RGB_SRGB,
  96    [MESA_FORMAT_SRGBA_DXT1] = BRW_SURFACEFORMAT_BC1_UNORM_SRGB,
  97    [MESA_FORMAT_SRGBA_DXT3] = BRW_SURFACEFORMAT_BC2_UNORM_SRGB,
  98    [MESA_FORMAT_SRGBA_DXT5] = BRW_SURFACEFORMAT_BC3_UNORM_SRGB,
  99    [MESA_FORMAT_SARGB8] = BRW_SURFACEFORMAT_B8G8R8A8_UNORM_SRGB,
 100    [MESA_FORMAT_SLA8] = BRW_SURFACEFORMAT_L8A8_UNORM_SRGB,
 101    [MESA_FORMAT_SL8] = BRW_SURFACEFORMAT_L8_UNORM_SRGB,
 102    [MESA_FORMAT_DUDV8] = BRW_SURFACEFORMAT_R8G8_SNORM,
 103    [MESA_FORMAT_SIGNED_RGBA8888_REV] = BRW_SURFACEFORMAT_R8G8B8A8_SNORM,
 104 };
 105
 106 bool
 107 brw_render_target_supported(gl_format format)
 108 {
 109    if (format == MESA_FORMAT_S8_Z24 ||
 110        format == MESA_FORMAT_X8_Z24 ||
 111        format == MESA_FORMAT_Z16) {
 112       return true;
 113    }
 114
 115    /* Not exactly true, as some of those formats are not renderable.
 116     * But at least we know how to translate them.
 117     */
 118    return brw_format_for_mesa_format[format] != 0;
 119 }
 120
 121 static GLuint translate_tex_format( gl_format mesa_format,
 122                                     GLenum internal_format,
 123                                     GLenum depth_mode )
 124 {
 125    switch( mesa_format ) {
 126
 127    case MESA_FORMAT_Z16:
 128       if (depth_mode == GL_INTENSITY)
 129           return BRW_SURFACEFORMAT_I16_UNORM;
 130       else if (depth_mode == GL_ALPHA)
 131           return BRW_SURFACEFORMAT_A16_UNORM;
 132       else if (depth_mode == GL_RED)
 133           return BRW_SURFACEFORMAT_R16_UNORM;
 134       else
 135           return BRW_SURFACEFORMAT_L16_UNORM;
 136
 137    case MESA_FORMAT_S8_Z24:
 138       /* XXX: these different surface formats don't seem to
 139        * make any difference for shadow sampler/compares.
 140        */
 141       if (depth_mode == GL_INTENSITY)
 142          return BRW_SURFACEFORMAT_I24X8_UNORM;
 143       else if (depth_mode == GL_ALPHA)
 144          return BRW_SURFACEFORMAT_A24X8_UNORM;
 145       else if (depth_mode == GL_RED)
 146          return BRW_SURFACEFORMAT_R24_UNORM_X8_TYPELESS;
 147       else
 148          return BRW_SURFACEFORMAT_L24X8_UNORM;
 149
 150    default:
 151       assert(brw_format_for_mesa_format[mesa_format] != 0);
 152       return brw_format_for_mesa_format[mesa_format];
 153    }
 154 }
 155
 156 static void
 157 brw_set_surface_tiling(struct brw_surface_state *surf, uint32_t tiling)
 158 {
 159    switch (tiling) {
 160    case I915_TILING_NONE:
 161       surf->ss3.tiled_surface = 0;
 162       surf->ss3.tile_walk = 0;
 163       break;
 164    case I915_TILING_X:
 165       surf->ss3.tiled_surface = 1;
 166       surf->ss3.tile_walk = BRW_TILEWALK_XMAJOR;
 167       break;
 168    case I915_TILING_Y:
 169       surf->ss3.tiled_surface = 1;
 170       surf->ss3.tile_walk = BRW_TILEWALK_YMAJOR;
 171       break;
 172    }
 173 }
 174
 175 static void
 176 brw_update_texture_surface( struct gl_context *ctx, GLuint unit )
 177 {
 178    struct brw_context *brw = brw_context(ctx);
 179    struct gl_texture_object *tObj = ctx->Texture.Unit[unit]._Current;
 180    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 181    struct gl_texture_image *firstImage = tObj->Image[0][tObj->BaseLevel];
 182    const GLuint surf_index = SURF_INDEX_TEXTURE(unit);
 183    struct brw_surface_state surf;
 184    void *map;
 185
 186    memset(&surf, 0, sizeof(surf));
 187
 188    surf.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
 189    surf.ss0.surface_type = translate_tex_target(tObj->Target);
 190    surf.ss0.surface_format = translate_tex_format(firstImage->TexFormat,
 191                                                   firstImage->InternalFormat,
 192                                                   tObj->DepthMode);
 193
 194    /* This is ok for all textures with channel width 8bit or less:
 195     */
 196 /*    surf.ss0.data_return_format = BRW_SURFACERETURNFORMAT_S1; */
 197    surf.ss1.base_addr = intelObj->mt->region->buffer->offset; /* reloc */
 198
 199    surf.ss2.mip_count = intelObj->_MaxLevel - tObj->BaseLevel;
 200    surf.ss2.width = firstImage->Width - 1;
 201    surf.ss2.height = firstImage->Height - 1;
 202    brw_set_surface_tiling(&surf, intelObj->mt->region->tiling);
 203    surf.ss3.pitch = (intelObj->mt->region->pitch * intelObj->mt->cpp) - 1;
 204    surf.ss3.depth = firstImage->Depth - 1;
 205
 206    surf.ss4.min_lod = 0;
 207
 208    if (tObj->Target == GL_TEXTURE_CUBE_MAP) {
 209       surf.ss0.cube_pos_x = 1;
 210       surf.ss0.cube_pos_y = 1;
 211       surf.ss0.cube_pos_z = 1;
 212       surf.ss0.cube_neg_x = 1;
 213       surf.ss0.cube_neg_y = 1;
 214       surf.ss0.cube_neg_z = 1;
 215    }
 216
 217    map = brw_state_batch(brw, sizeof(surf), 32,
 218                          &brw->wm.surf_bo[surf_index],
 219                          &brw->wm.surf_offset[surf_index]);
 220    memcpy(map, &surf, sizeof(surf));
 221
 222    /* Emit relocation to surface contents */
 223    drm_intel_bo_emit_reloc(brw->wm.surf_bo[surf_index],
 224                            brw->wm.surf_offset[surf_index] +
 225                            offsetof(struct brw_surface_state, ss1),
 226                            intelObj->mt->region->buffer, 0,
 227                            I915_GEM_DOMAIN_SAMPLER, 0);
 228 }
 229
 230 /**
 231  * Create the constant buffer surface.  Vertex/fragment shader constants will be
 232  * read from this buffer with Data Port Read instructions/messages.
 233  */
 234 void
 235 brw_create_constant_surface(struct brw_context *brw,
 236                             drm_intel_bo *bo,
 237                             int width,
 238                             drm_intel_bo **out_bo,
 239                             uint32_t *out_offset)
 240 {
 241    struct intel_context *intel = &brw->intel;
 242    const GLint w = width - 1;
 243    struct brw_surface_state surf;
 244    void *map;
 245
 246    memset(&surf, 0, sizeof(surf));
 247
 248    surf.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
 249    surf.ss0.surface_type = BRW_SURFACE_BUFFER;
 250    surf.ss0.surface_format = BRW_SURFACEFORMAT_R32G32B32A32_FLOAT;
 251
 252    if (intel->gen >= 6)
 253       surf.ss0.render_cache_read_write = 1;
 254
 255    assert(bo);
 256    surf.ss1.base_addr = bo->offset; /* reloc */
 257
 258    surf.ss2.width = w & 0x7f;            /* bits 6:0 of size or width */
 259    surf.ss2.height = (w >> 7) & 0x1fff;  /* bits 19:7 of size or width */
 260    surf.ss3.depth = (w >> 20) & 0x7f;    /* bits 26:20 of size or width */
 261    surf.ss3.pitch = (width * 16) - 1; /* ignored?? */
 262    brw_set_surface_tiling(&surf, I915_TILING_NONE); /* tiling now allowed */
 263
 264    map = brw_state_batch(brw, sizeof(surf), 32, out_bo, out_offset);
 265    memcpy(map, &surf, sizeof(surf));
 266
 267    /* Emit relocation to surface contents.  Section 5.1.1 of the gen4
 268     * bspec ("Data Cache") says that the data cache does not exist as
 269     * a separate cache and is just the sampler cache.
 270     */
 271    drm_intel_bo_emit_reloc(*out_bo, (*out_offset +
 272                                      offsetof(struct brw_surface_state, ss1)),
 273                            bo, 0,
 274                            I915_GEM_DOMAIN_SAMPLER, 0);
 275 }
 276
 277 /* Creates a new WM constant buffer reflecting the current fragment program's
 278  * constants, if needed by the fragment program.
 279  *
 280  * Otherwise, constants go through the CURBEs using the brw_constant_buffer
 281  * state atom.
 282  */
 283 static void
 284 prepare_wm_constants(struct brw_context *brw)
 285 {
 286    struct gl_context *ctx = &brw->intel.ctx;
 287    struct intel_context *intel = &brw->intel;
 288    struct brw_fragment_program *fp =
 289       (struct brw_fragment_program *) brw->fragment_program;
 290    const int size = brw->wm.prog_data->nr_pull_params * sizeof(float);
 291    float *constants;
 292    unsigned int i;
 293
 294    _mesa_load_state_parameters(ctx, fp->program.Base.Parameters);
 295
 296    /* BRW_NEW_FRAGMENT_PROGRAM */
 297    if (brw->wm.prog_data->nr_pull_params == 0) {
 298       if (brw->wm.const_bo) {
 299          drm_intel_bo_unreference(brw->wm.const_bo);
 300          brw->wm.const_bo = NULL;
 301          brw->state.dirty.brw |= BRW_NEW_WM_CONSTBUF;
 302       }
 303       return;
 304    }
 305
 306    drm_intel_bo_unreference(brw->wm.const_bo);
 307    brw->wm.const_bo = drm_intel_bo_alloc(intel->bufmgr, "WM const bo",
 308                                          size, 64);
 309
 310    /* _NEW_PROGRAM_CONSTANTS */
 311    drm_intel_gem_bo_map_gtt(brw->wm.const_bo);
 312    constants = brw->wm.const_bo->virtual;
 313    for (i = 0; i < brw->wm.prog_data->nr_pull_params; i++) {
 314       constants[i] = convert_param(brw->wm.prog_data->pull_param_convert[i],
 315                                    *brw->wm.prog_data->pull_param[i]);
 316    }
 317    drm_intel_gem_bo_unmap_gtt(brw->wm.const_bo);
 318
 319    brw->state.dirty.brw |= BRW_NEW_WM_CONSTBUF;
 320 }
 321
 322 const struct brw_tracked_state brw_wm_constants = {
 323    .dirty = {
 324       .mesa = (_NEW_PROGRAM_CONSTANTS),
 325       .brw = (BRW_NEW_FRAGMENT_PROGRAM),
 326       .cache = 0
 327    },
 328    .prepare = prepare_wm_constants,
 329 };
 330
 331 /**
 332  * Updates surface / buffer for fragment shader constant buffer, if
 333  * one is required.
 334  *
 335  * This consumes the state updates for the constant buffer, and produces
 336  * BRW_NEW_WM_SURFACES to get picked up by brw_prepare_wm_surfaces for
 337  * inclusion in the binding table.
 338  */
 339 static void upload_wm_constant_surface(struct brw_context *brw )
 340 {
 341    GLuint surf = SURF_INDEX_FRAG_CONST_BUFFER;
 342    struct brw_fragment_program *fp =
 343       (struct brw_fragment_program *) brw->fragment_program;
 344    const struct gl_program_parameter_list *params =
 345       fp->program.Base.Parameters;
 346
 347    /* If there's no constant buffer, then no surface BO is needed to point at
 348     * it.
 349     */
 350    if (brw->wm.const_bo == 0) {
 351       if (brw->wm.surf_bo[surf] != NULL) {
 352          drm_intel_bo_unreference(brw->wm.surf_bo[surf]);
 353          brw->wm.surf_bo[surf] = NULL;
 354          brw->state.dirty.brw |= BRW_NEW_WM_SURFACES;
 355       }
 356       return;
 357    }
 358
 359    brw_create_constant_surface(brw, brw->wm.const_bo, params->NumParameters,
 360                                &brw->wm.surf_bo[surf],
 361                                &brw->wm.surf_offset[surf]);
 362    brw->state.dirty.brw |= BRW_NEW_WM_SURFACES;
 363 }
 364
 365 const struct brw_tracked_state brw_wm_constant_surface = {
 366    .dirty = {
 367       .mesa = 0,
 368       .brw = (BRW_NEW_WM_CONSTBUF |
 369               BRW_NEW_BATCH),
 370       .cache = 0
 371    },
 372    .emit = upload_wm_constant_surface,
 373 };
 374
 375 static void
 376 brw_update_null_renderbuffer_surface(struct brw_context *brw, unsigned int unit)
 377 {
 378    struct intel_context *intel = &brw->intel;
 379    struct brw_surface_state surf;
 380    void *map;
 381
 382    memset(&surf, 0, sizeof(surf));
 383
 384    surf.ss0.surface_type = BRW_SURFACE_NULL;
 385    surf.ss0.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 386    surf.ss1.base_addr = 0;
 387
 388    surf.ss2.width = 0;
 389    surf.ss2.height = 0;
 390    brw_set_surface_tiling(&surf, I915_TILING_NONE);
 391    surf.ss3.pitch = 0;
 392
 393    if (intel->gen < 6) {
 394       /* _NEW_COLOR */
 395       surf.ss0.color_blend = 0;
 396       surf.ss0.writedisable_red =   1;
 397       surf.ss0.writedisable_green = 1;
 398       surf.ss0.writedisable_blue =  1;
 399       surf.ss0.writedisable_alpha = 1;
 400    }
 401
 402    map = brw_state_batch(brw, sizeof(surf), 32,
 403                          &brw->wm.surf_bo[unit],
 404                          &brw->wm.surf_offset[unit]);
 405    memcpy(map, &surf, sizeof(surf));
 406 }
 407
 408 /**
 409  * Sets up a surface state structure to point at the given region.
 410  * While it is only used for the front/back buffer currently, it should be
 411  * usable for further buffers when doing ARB_draw_buffer support.
 412  */
 413 static void
 414 brw_update_renderbuffer_surface(struct brw_context *brw,
 415                                 struct gl_renderbuffer *rb,
 416                                 unsigned int unit)
 417 {
 418    struct intel_context *intel = &brw->intel;
 419    struct gl_context *ctx = &intel->ctx;
 420    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 421    struct intel_region *region = irb->region;
 422    struct brw_surface_state surf;
 423    void *map;
 424
 425    memset(&surf, 0, sizeof(surf));
 426
 427    switch (irb->Base.Format) {
 428    case MESA_FORMAT_XRGB8888:
 429       /* XRGB is handled as ARGB because the chips in this family
 430        * cannot render to XRGB targets.  This means that we have to
 431        * mask writes to alpha (ala glColorMask) and reconfigure the
 432        * alpha blending hardware to use GL_ONE (or GL_ZERO) for
 433        * cases where GL_DST_ALPHA (or GL_ONE_MINUS_DST_ALPHA) is
 434        * used.
 435        */
 436       surf.ss0.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 437       break;
 438    case MESA_FORMAT_SARGB8:
 439       /* without GL_EXT_framebuffer_sRGB we shouldn't bind sRGB
 440          surfaces to the blend/update as sRGB */
 441       surf.ss0.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 442       break;
 443    default:
 444       surf.ss0.surface_format = brw_format_for_mesa_format[irb->Base.Format];
 445       assert(surf.ss0.surface_format != 0);
 446    }
 447
 448    surf.ss0.surface_type = BRW_SURFACE_2D;
 449    if (region->tiling == I915_TILING_NONE) {
 450       surf.ss1.base_addr = (region->draw_x +
 451                             region->draw_y * region->pitch) * region->cpp;
 452    } else {
 453       uint32_t tile_base, tile_x, tile_y;
 454       uint32_t pitch = region->pitch * region->cpp;
 455
 456       if (region->tiling == I915_TILING_X) {
 457          tile_x = region->draw_x % (512 / region->cpp);
 458          tile_y = region->draw_y % 8;
 459          tile_base = ((region->draw_y / 8) * (8 * pitch));
 460          tile_base += (region->draw_x - tile_x) / (512 / region->cpp) * 4096;
 461       } else {
 462          /* Y */
 463          tile_x = region->draw_x % (128 / region->cpp);
 464          tile_y = region->draw_y % 32;
 465          tile_base = ((region->draw_y / 32) * (32 * pitch));
 466          tile_base += (region->draw_x - tile_x) / (128 / region->cpp) * 4096;
 467       }
 468       assert(brw->has_surface_tile_offset || (tile_x == 0 && tile_y == 0));
 469       assert(tile_x % 4 == 0);
 470       assert(tile_y % 2 == 0);
 471       /* Note that the low bits of these fields are missing, so
 472        * there's the possibility of getting in trouble.
 473        */
 474       surf.ss1.base_addr = tile_base;
 475       surf.ss5.x_offset = tile_x / 4;
 476       surf.ss5.y_offset = tile_y / 2;
 477    }
 478    surf.ss1.base_addr += region->buffer->offset; /* reloc */
 479
 480    surf.ss2.width = rb->Width - 1;
 481    surf.ss2.height = rb->Height - 1;
 482    brw_set_surface_tiling(&surf, region->tiling);
 483    surf.ss3.pitch = (region->pitch * region->cpp) - 1;
 484
 485    if (intel->gen < 6) {
 486       /* _NEW_COLOR */
 487       surf.ss0.color_blend = (!ctx->Color._LogicOpEnabled &&
 488                               (ctx->Color.BlendEnabled & (1 << unit)));
 489       surf.ss0.writedisable_red =   !ctx->Color.ColorMask[unit][0];
 490       surf.ss0.writedisable_green = !ctx->Color.ColorMask[unit][1];
 491       surf.ss0.writedisable_blue =  !ctx->Color.ColorMask[unit][2];
 492       /* As mentioned above, disable writes to the alpha component when the
 493        * renderbuffer is XRGB.
 494        */
 495       if (ctx->DrawBuffer->Visual.alphaBits == 0)
 496          surf.ss0.writedisable_alpha = 1;
 497       else
 498          surf.ss0.writedisable_alpha = !ctx->Color.ColorMask[unit][3];
 499    }
 500
 501    map = brw_state_batch(brw, sizeof(surf), 32,
 502                          &brw->wm.surf_bo[unit],
 503                          &brw->wm.surf_offset[unit]);
 504    memcpy(map, &surf, sizeof(surf));
 505
 506    drm_intel_bo_emit_reloc(brw->wm.surf_bo[unit],
 507                            brw->wm.surf_offset[unit] +
 508                            offsetof(struct brw_surface_state, ss1),
 509                            region->buffer,
 510                            surf.ss1.base_addr - region->buffer->offset,
 511                            I915_GEM_DOMAIN_RENDER,
 512                            I915_GEM_DOMAIN_RENDER);
 513 }
 514
 515 static void
 516 prepare_wm_surfaces(struct brw_context *brw)
 517 {
 518    struct gl_context *ctx = &brw->intel.ctx;
 519    int i;
 520    int nr_surfaces = 0;
 521
 522    if (ctx->DrawBuffer->_NumColorDrawBuffers >= 1) {
 523       for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
 524          struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 525          struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 526          struct intel_region *region = irb ? irb->region : NULL;
 527
 528          brw_add_validated_bo(brw, region->buffer);
 529          nr_surfaces = SURF_INDEX_DRAW(i) + 1;
 530       }
 531    }
 532
 533    if (brw->wm.const_bo) {
 534       brw_add_validated_bo(brw, brw->wm.const_bo);
 535       nr_surfaces = SURF_INDEX_FRAG_CONST_BUFFER + 1;
 536    }
 537
 538    for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
 539       const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
 540       struct gl_texture_object *tObj = texUnit->_Current;
 541       struct intel_texture_object *intelObj = intel_texture_object(tObj);
 542
 543       if (texUnit->_ReallyEnabled) {
 544          brw_add_validated_bo(brw, intelObj->mt->region->buffer);
 545          nr_surfaces = SURF_INDEX_TEXTURE(i) + 1;
 546       }
 547    }
 548
 549    /* Have to update this in our prepare, since the unit's prepare
 550     * relies on it.
 551     */
 552    if (brw->wm.nr_surfaces != nr_surfaces) {
 553       brw->wm.nr_surfaces = nr_surfaces;
 554       brw->state.dirty.brw |= BRW_NEW_NR_WM_SURFACES;
 555    }
 556 }
 557
 558 /**
 559  * Constructs the set of surface state objects pointed to by the
 560  * binding table.
 561  */
 562 static void
 563 upload_wm_surfaces(struct brw_context *brw)
 564 {
 565    struct gl_context *ctx = &brw->intel.ctx;
 566    GLuint i;
 567
 568    /* _NEW_BUFFERS | _NEW_COLOR */
 569    /* Update surfaces for drawing buffers */
 570    if (ctx->DrawBuffer->_NumColorDrawBuffers >= 1) {
 571       for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
 572          if (intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[i])) {
 573             brw_update_renderbuffer_surface(brw,
 574                                             ctx->DrawBuffer->_ColorDrawBuffers[i],
 575                                             i);
 576          } else {
 577             brw_update_null_renderbuffer_surface(brw, i);
 578          }
 579       }
 580    } else {
 581       brw_update_null_renderbuffer_surface(brw, 0);
 582    }
 583
 584    /* Update surfaces for textures */
 585    for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
 586       const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
 587       const GLuint surf = SURF_INDEX_TEXTURE(i);
 588
 589       /* _NEW_TEXTURE */
 590       if (texUnit->_ReallyEnabled) {
 591          brw_update_texture_surface(ctx, i);
 592       } else {
 593          drm_intel_bo_unreference(brw->wm.surf_bo[surf]);
 594          brw->wm.surf_bo[surf] = NULL;
 595       }
 596    }
 597
 598    brw->state.dirty.brw |= BRW_NEW_WM_SURFACES;
 599 }
 600
 601 const struct brw_tracked_state brw_wm_surfaces = {
 602    .dirty = {
 603       .mesa = (_NEW_COLOR |
 604                _NEW_TEXTURE |
 605                _NEW_BUFFERS),
 606       .brw = (BRW_NEW_BATCH),
 607       .cache = 0
 608    },
 609    .prepare = prepare_wm_surfaces,
 610    .emit = upload_wm_surfaces,
 611 };
 612
 613 /**
 614  * Constructs the binding table for the WM surface state, which maps unit
 615  * numbers to surface state objects.
 616  */
 617 static void
 618 brw_wm_upload_binding_table(struct brw_context *brw)
 619 {
 620    uint32_t *bind;
 621    int i;
 622
 623    /* Might want to calculate nr_surfaces first, to avoid taking up so much
 624     * space for the binding table.
 625     */
 626    bind = brw_state_batch(brw, sizeof(uint32_t) * BRW_WM_MAX_SURF,
 627                           32, &brw->wm.bind_bo, &brw->wm.bind_bo_offset);
 628
 629    for (i = 0; i < BRW_WM_MAX_SURF; i++) {
 630       /* BRW_NEW_WM_SURFACES */
 631       bind[i] = brw->wm.surf_offset[i];
 632       if (brw->wm.surf_bo[i]) {
 633          bind[i] = brw->wm.surf_offset[i];
 634       } else {
 635          bind[i] = 0;
 636       }
 637    }
 638
 639    brw->state.dirty.brw |= BRW_NEW_BINDING_TABLE;
 640 }
 641
 642 const struct brw_tracked_state brw_wm_binding_table = {
 643    .dirty = {
 644       .mesa = 0,
 645       .brw = (BRW_NEW_BATCH |
 646               BRW_NEW_WM_SURFACES),
 647       .cache = 0
 648    },
 649    .emit = brw_wm_upload_binding_table,
 650 };