src/mesa/drivers/dri/i965/brw_blorp.cpp

   1 /*
   2  * Copyright © 2012 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 <errno.h>
  25 #include "intel_batchbuffer.h"
  26 #include "intel_fbo.h"
  27
  28 #include "brw_blorp.h"
  29 #include "brw_defines.h"
  30 #include "brw_state.h"
  31 #include "gen6_blorp.h"
  32 #include "gen7_blorp.h"
  33
  34 #define FILE_DEBUG_FLAG DEBUG_BLORP
  35
  36 brw_blorp_mip_info::brw_blorp_mip_info()
  37    : mt(NULL),
  38      level(0),
  39      layer(0),
  40      width(0),
  41      height(0),
  42      x_offset(0),
  43      y_offset(0)
  44 {
  45 }
  46
  47 brw_blorp_surface_info::brw_blorp_surface_info()
  48    : map_stencil_as_y_tiled(false),
  49      num_samples(0)
  50 {
  51 }
  52
  53 void
  54 brw_blorp_mip_info::set(struct intel_mipmap_tree *mt,
  55                         unsigned int level, unsigned int layer)
  56 {
  57    /* Layer is a physical layer, so if this is a 2D multisample array texture
  58     * using INTEL_MSAA_LAYOUT_UMS or INTEL_MSAA_LAYOUT_CMS, then it had better
  59     * be a multiple of num_samples.
  60     */
  61    if (mt->msaa_layout == INTEL_MSAA_LAYOUT_UMS ||
  62        mt->msaa_layout == INTEL_MSAA_LAYOUT_CMS) {
  63       assert(layer % mt->num_samples == 0);
  64    }
  65
  66    intel_miptree_check_level_layer(mt, level, layer);
  67
  68    this->mt = mt;
  69    this->level = level;
  70    this->layer = layer;
  71    this->width = minify(mt->physical_width0, level - mt->first_level);
  72    this->height = minify(mt->physical_height0, level - mt->first_level);
  73
  74    intel_miptree_get_image_offset(mt, level, layer, &x_offset, &y_offset);
  75 }
  76
  77 void
  78 brw_blorp_surface_info::set(struct brw_context *brw,
  79                             struct intel_mipmap_tree *mt,
  80                             unsigned int level, unsigned int layer,
  81                             bool is_render_target)
  82 {
  83    brw_blorp_mip_info::set(mt, level, layer);
  84    this->num_samples = mt->num_samples;
  85    this->array_spacing_lod0 = mt->array_spacing_lod0;
  86    this->map_stencil_as_y_tiled = false;
  87    this->msaa_layout = mt->msaa_layout;
  88
  89    switch (mt->format) {
  90    case MESA_FORMAT_S_UINT8:
  91       /* The miptree is a W-tiled stencil buffer.  Surface states can't be set
  92        * up for W tiling, so we'll need to use Y tiling and have the WM
  93        * program swizzle the coordinates.
  94        */
  95       this->map_stencil_as_y_tiled = true;
  96       this->brw_surfaceformat = BRW_SURFACEFORMAT_R8_UNORM;
  97       break;
  98    case MESA_FORMAT_Z24_UNORM_X8_UINT:
  99       /* It would make sense to use BRW_SURFACEFORMAT_R24_UNORM_X8_TYPELESS
 100        * here, but unfortunately it isn't supported as a render target, which
 101        * would prevent us from blitting to 24-bit depth.
 102        *
 103        * The miptree consists of 32 bits per pixel, arranged as 24-bit depth
 104        * values interleaved with 8 "don't care" bits.  Since depth values don't
 105        * require any blending, it doesn't matter how we interpret the bit
 106        * pattern as long as we copy the right amount of data, so just map it
 107        * as 8-bit BGRA.
 108        */
 109       this->brw_surfaceformat = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 110       break;
 111    case MESA_FORMAT_Z_FLOAT32:
 112       this->brw_surfaceformat = BRW_SURFACEFORMAT_R32_FLOAT;
 113       break;
 114    case MESA_FORMAT_Z_UNORM16:
 115       this->brw_surfaceformat = BRW_SURFACEFORMAT_R16_UNORM;
 116       break;
 117    default: {
 118       mesa_format linear_format = _mesa_get_srgb_format_linear(mt->format);
 119       if (is_render_target) {
 120          assert(brw->format_supported_as_render_target[linear_format]);
 121          this->brw_surfaceformat = brw->render_target_format[linear_format];
 122       } else {
 123          this->brw_surfaceformat = brw_format_for_mesa_format(linear_format);
 124       }
 125       break;
 126    }
 127    }
 128 }
 129
 130
 131 /**
 132  * Split x_offset and y_offset into a base offset (in bytes) and a remaining
 133  * x/y offset (in pixels).  Note: we can't do this by calling
 134  * intel_renderbuffer_tile_offsets(), because the offsets may have been
 135  * adjusted to account for Y vs. W tiling differences.  So we compute it
 136  * directly from the adjusted offsets.
 137  */
 138 uint32_t
 139 brw_blorp_surface_info::compute_tile_offsets(uint32_t *tile_x,
 140                                              uint32_t *tile_y) const
 141 {
 142    uint32_t mask_x, mask_y;
 143
 144    intel_miptree_get_tile_masks(mt, &mask_x, &mask_y, map_stencil_as_y_tiled);
 145
 146    *tile_x = x_offset & mask_x;
 147    *tile_y = y_offset & mask_y;
 148
 149    return intel_miptree_get_aligned_offset(mt, x_offset & ~mask_x,
 150                                            y_offset & ~mask_y,
 151                                            map_stencil_as_y_tiled);
 152 }
 153
 154
 155 brw_blorp_params::brw_blorp_params()
 156    : x0(0),
 157      y0(0),
 158      x1(0),
 159      y1(0),
 160      depth_format(0),
 161      hiz_op(GEN6_HIZ_OP_NONE),
 162      fast_clear_op(GEN7_FAST_CLEAR_OP_NONE),
 163      use_wm_prog(false)
 164 {
 165    color_write_disable[0] = false;
 166    color_write_disable[1] = false;
 167    color_write_disable[2] = false;
 168    color_write_disable[3] = false;
 169 }
 170
 171 extern "C" {
 172 void
 173 intel_hiz_exec(struct brw_context *brw, struct intel_mipmap_tree *mt,
 174                unsigned int level, unsigned int layer, gen6_hiz_op op)
 175 {
 176    const char *opname = NULL;
 177
 178    switch (op) {
 179    case GEN6_HIZ_OP_DEPTH_RESOLVE:
 180       opname = "depth resolve";
 181       break;
 182    case GEN6_HIZ_OP_HIZ_RESOLVE:
 183       opname = "hiz ambiguate";
 184       break;
 185    case GEN6_HIZ_OP_DEPTH_CLEAR:
 186       opname = "depth clear";
 187       break;
 188    case GEN6_HIZ_OP_NONE:
 189       opname = "noop?";
 190       break;
 191    }
 192
 193    DBG("%s %s to mt %p level %d layer %d\n",
 194        __FUNCTION__, opname, mt, level, layer);
 195
 196    if (brw->gen >= 8) {
 197       gen8_hiz_exec(brw, mt, level, layer, op);
 198    } else {
 199       brw_hiz_op_params params(mt, level, layer, op);
 200       brw_blorp_exec(brw, &params);
 201    }
 202 }
 203
 204 } /* extern "C" */
 205
 206 void
 207 brw_blorp_exec(struct brw_context *brw, const brw_blorp_params *params)
 208 {
 209    struct gl_context *ctx = &brw->ctx;
 210    uint32_t estimated_max_batch_usage = 1500;
 211    bool check_aperture_failed_once = false;
 212
 213    /* Flush the sampler and render caches.  We definitely need to flush the
 214     * sampler cache so that we get updated contents from the render cache for
 215     * the glBlitFramebuffer() source.  Also, we are sometimes warned in the
 216     * docs to flush the cache between reinterpretations of the same surface
 217     * data with different formats, which blorp does for stencil and depth
 218     * data.
 219     */
 220    intel_batchbuffer_emit_mi_flush(brw);
 221
 222 retry:
 223    intel_batchbuffer_require_space(brw, estimated_max_batch_usage, RENDER_RING);
 224    intel_batchbuffer_save_state(brw);
 225    drm_intel_bo *saved_bo = brw->batch.bo;
 226    uint32_t saved_used = brw->batch.used;
 227    uint32_t saved_state_batch_offset = brw->batch.state_batch_offset;
 228
 229    switch (brw->gen) {
 230    case 6:
 231       gen6_blorp_exec(brw, params);
 232       break;
 233    case 7:
 234       gen7_blorp_exec(brw, params);
 235       break;
 236    default:
 237       /* BLORP is not supported before Gen6. */
 238       unreachable("not reached");
 239    }
 240
 241    /* Make sure we didn't wrap the batch unintentionally, and make sure we
 242     * reserved enough space that a wrap will never happen.
 243     */
 244    assert(brw->batch.bo == saved_bo);
 245    assert((brw->batch.used - saved_used) * 4 +
 246           (saved_state_batch_offset - brw->batch.state_batch_offset) <
 247           estimated_max_batch_usage);
 248    /* Shut up compiler warnings on release build */
 249    (void)saved_bo;
 250    (void)saved_used;
 251    (void)saved_state_batch_offset;
 252
 253    /* Check if the blorp op we just did would make our batch likely to fail to
 254     * map all the BOs into the GPU at batch exec time later.  If so, flush the
 255     * batch and try again with nothing else in the batch.
 256     */
 257    if (dri_bufmgr_check_aperture_space(&brw->batch.bo, 1)) {
 258       if (!check_aperture_failed_once) {
 259          check_aperture_failed_once = true;
 260          intel_batchbuffer_reset_to_saved(brw);
 261          intel_batchbuffer_flush(brw);
 262          goto retry;
 263       } else {
 264          int ret = intel_batchbuffer_flush(brw);
 265          WARN_ONCE(ret == -ENOSPC,
 266                    "i965: blorp emit exceeded available aperture space\n");
 267       }
 268    }
 269
 270    if (unlikely(brw->always_flush_batch))
 271       intel_batchbuffer_flush(brw);
 272
 273    /* We've smashed all state compared to what the normal 3D pipeline
 274     * rendering tracks for GL.
 275     */
 276    brw->state.dirty.brw = ~0;
 277    brw->state.dirty.cache = ~0;
 278    brw->no_depth_or_stencil = false;
 279    brw->ib.type = -1;
 280
 281    /* Flush the sampler cache so any texturing from the destination is
 282     * coherent.
 283     */
 284    intel_batchbuffer_emit_mi_flush(brw);
 285 }
 286
 287 brw_hiz_op_params::brw_hiz_op_params(struct intel_mipmap_tree *mt,
 288                                      unsigned int level,
 289                                      unsigned int layer,
 290                                      gen6_hiz_op op)
 291 {
 292    this->hiz_op = op;
 293
 294    depth.set(mt, level, layer);
 295
 296    /* Align the rectangle primitive to 8x4 pixels.
 297     *
 298     * During fast depth clears, the emitted rectangle primitive  must be
 299     * aligned to 8x4 pixels.  From the Ivybridge PRM, Vol 2 Part 1 Section
 300     * 11.5.3.1 Depth Buffer Clear (and the matching section in the Sandybridge
 301     * PRM):
 302     *     If Number of Multisamples is NUMSAMPLES_1, the rectangle must be
 303     *     aligned to an 8x4 pixel block relative to the upper left corner
 304     *     of the depth buffer [...]
 305     *
 306     * For hiz resolves, the rectangle must also be 8x4 aligned. Item
 307     * WaHizAmbiguate8x4Aligned from the Haswell workarounds page and the
 308     * Ivybridge simulator require the alignment.
 309     *
 310     * To be safe, let's just align the rect for all hiz operations and all
 311     * hardware generations.
 312     *
 313     * However, for some miptree slices of a Z24 texture, emitting an 8x4
 314     * aligned rectangle that covers the slice may clobber adjacent slices if
 315     * we strictly adhered to the texture alignments specified in the PRM.  The
 316     * Ivybridge PRM, Section "Alignment Unit Size", states that
 317     * SURFACE_STATE.Surface_Horizontal_Alignment should be 4 for Z24 surfaces,
 318     * not 8. But commit 1f112cc increased the alignment from 4 to 8, which
 319     * prevents the clobbering.
 320     */
 321    depth.width = ALIGN(depth.width, 8);
 322    depth.height = ALIGN(depth.height, 4);
 323
 324    x1 = depth.width;
 325    y1 = depth.height;
 326
 327    assert(intel_miptree_level_has_hiz(mt, level));
 328
 329    switch (mt->format) {
 330    case MESA_FORMAT_Z_UNORM16:       depth_format = BRW_DEPTHFORMAT_D16_UNORM; break;
 331    case MESA_FORMAT_Z_FLOAT32: depth_format = BRW_DEPTHFORMAT_D32_FLOAT; break;
 332    case MESA_FORMAT_Z24_UNORM_X8_UINT:    depth_format = BRW_DEPTHFORMAT_D24_UNORM_X8_UINT; break;
 333    default:                    unreachable("not reached");
 334    }
 335 }
 336
 337 uint32_t
 338 brw_hiz_op_params::get_wm_prog(struct brw_context *brw,
 339                                brw_blorp_prog_data **prog_data) const
 340 {
 341    return 0;
 342 }