src/gallium/drivers/panfrost/pan_mfbd.c

   1 /*
   2  * Copyright 2018-2019 Alyssa Rosenzweig
   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 FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24
  25 #include "pan_bo.h"
  26 #include "pan_context.h"
  27 #include "pan_util.h"
  28 #include "pan_format.h"
  29
  30 #include "util/format/u_format.h"
  31
  32 static struct mali_rt_format
  33 panfrost_mfbd_format(struct pipe_surface *surf)
  34 {
  35         /* Explode details on the format */
  36
  37         const struct util_format_description *desc =
  38                 util_format_description(surf->format);
  39
  40         /* The swizzle for rendering is inverted from texturing */
  41
  42         unsigned char swizzle[4];
  43         panfrost_invert_swizzle(desc->swizzle, swizzle);
  44
  45         /* Fill in accordingly, defaulting to 8-bit UNORM */
  46
  47         struct mali_rt_format fmt = {
  48                 .unk1 = 0x4000000,
  49                 .unk2 = 0x1,
  50                 .nr_channels = MALI_POSITIVE(desc->nr_channels),
  51                 .unk3 = 0x4,
  52                 .flags = 0x8,
  53                 .swizzle = panfrost_translate_swizzle_4(swizzle),
  54                 .no_preload = true
  55         };
  56
  57         if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
  58                 fmt.flags |= MALI_MFBD_FORMAT_SRGB;
  59
  60         /* sRGB handled as a dedicated flag */
  61         enum pipe_format linearized = util_format_linear(surf->format);
  62
  63         /* If RGB, we're good to go */
  64         if (util_format_is_unorm8(desc))
  65                 return fmt;
  66
  67         /* Set flags for alternative formats */
  68
  69         switch (linearized) {
  70         case PIPE_FORMAT_B5G6R5_UNORM:
  71                 fmt.unk1 = 0x14000000;
  72                 fmt.nr_channels = MALI_POSITIVE(2);
  73                 fmt.unk3 |= 0x1;
  74                 break;
  75
  76         case PIPE_FORMAT_A4B4G4R4_UNORM:
  77         case PIPE_FORMAT_B4G4R4A4_UNORM:
  78                 fmt.unk1 = 0x10000000;
  79                 fmt.unk3 = 0x5;
  80                 fmt.nr_channels = MALI_POSITIVE(1);
  81                 break;
  82
  83         case PIPE_FORMAT_R10G10B10A2_UNORM:
  84         case PIPE_FORMAT_B10G10R10A2_UNORM:
  85         case PIPE_FORMAT_R10G10B10X2_UNORM:
  86         case PIPE_FORMAT_B10G10R10X2_UNORM:
  87                 fmt.unk1 = 0x08000000;
  88                 fmt.unk3 = 0x6;
  89                 fmt.nr_channels = MALI_POSITIVE(1);
  90                 break;
  91
  92         /* Generic 8-bit */
  93         case PIPE_FORMAT_R8_UINT:
  94         case PIPE_FORMAT_R8_SINT:
  95                 fmt.unk1 = 0x80000000;
  96                 fmt.unk3 = 0x0;
  97                 fmt.nr_channels = MALI_POSITIVE(1);
  98                 break;
  99
 100         /* Generic 32-bit */
 101         case PIPE_FORMAT_R11G11B10_FLOAT:
 102         case PIPE_FORMAT_R8G8B8A8_UINT:
 103         case PIPE_FORMAT_R8G8B8A8_SINT:
 104         case PIPE_FORMAT_R16G16_FLOAT:
 105         case PIPE_FORMAT_R16G16_UINT:
 106         case PIPE_FORMAT_R16G16_SINT:
 107         case PIPE_FORMAT_R32_FLOAT:
 108         case PIPE_FORMAT_R32_UINT:
 109         case PIPE_FORMAT_R32_SINT:
 110         case PIPE_FORMAT_R10G10B10A2_UINT:
 111                 fmt.unk1 = 0x88000000;
 112                 fmt.unk3 = 0x0;
 113                 fmt.nr_channels = MALI_POSITIVE(4);
 114                 break;
 115
 116         /* Generic 16-bit */
 117         case PIPE_FORMAT_R8G8_UINT:
 118         case PIPE_FORMAT_R8G8_SINT:
 119         case PIPE_FORMAT_R16_FLOAT:
 120         case PIPE_FORMAT_R16_UINT:
 121         case PIPE_FORMAT_R16_SINT:
 122         case PIPE_FORMAT_B5G5R5A1_UNORM:
 123                 fmt.unk1 = 0x84000000;
 124                 fmt.unk3 = 0x0;
 125                 fmt.nr_channels = MALI_POSITIVE(2);
 126                 break;
 127
 128         /* Generic 64-bit */
 129         case PIPE_FORMAT_R32G32_FLOAT:
 130         case PIPE_FORMAT_R32G32_SINT:
 131         case PIPE_FORMAT_R32G32_UINT:
 132         case PIPE_FORMAT_R16G16B16A16_FLOAT:
 133         case PIPE_FORMAT_R16G16B16A16_SINT:
 134         case PIPE_FORMAT_R16G16B16A16_UINT:
 135                 fmt.unk1 = 0x8c000000;
 136                 fmt.unk3 = 0x1;
 137                 fmt.nr_channels = MALI_POSITIVE(2);
 138                 break;
 139
 140         /* Generic 128-bit */
 141         case PIPE_FORMAT_R32G32B32A32_FLOAT:
 142         case PIPE_FORMAT_R32G32B32A32_SINT:
 143         case PIPE_FORMAT_R32G32B32A32_UINT:
 144                 fmt.unk1 = 0x90000000;
 145                 fmt.unk3 = 0x1;
 146                 fmt.nr_channels = MALI_POSITIVE(4);
 147                 break;
 148
 149         default:
 150                 unreachable("Invalid format rendering");
 151         }
 152
 153         return fmt;
 154 }
 155
 156
 157 static void
 158 panfrost_mfbd_clear(
 159         struct panfrost_batch *batch,
 160         struct bifrost_framebuffer *fb,
 161         struct bifrost_fb_extra *fbx,
 162         struct bifrost_render_target *rts,
 163         unsigned rt_count)
 164 {
 165         for (unsigned i = 0; i < rt_count; ++i) {
 166                 if (!(batch->clear & (PIPE_CLEAR_COLOR0 << i)))
 167                         continue;
 168
 169                 rts[i].clear_color_1 = batch->clear_color[i][0];
 170                 rts[i].clear_color_2 = batch->clear_color[i][1];
 171                 rts[i].clear_color_3 = batch->clear_color[i][2];
 172                 rts[i].clear_color_4 = batch->clear_color[i][3];
 173         }
 174
 175         if (batch->clear & PIPE_CLEAR_DEPTH) {
 176                 fb->clear_depth = batch->clear_depth;
 177         }
 178
 179         if (batch->clear & PIPE_CLEAR_STENCIL) {
 180                 fb->clear_stencil = batch->clear_stencil;
 181         }
 182 }
 183
 184 static void
 185 panfrost_mfbd_set_cbuf(
 186         struct bifrost_render_target *rt,
 187         struct pipe_surface *surf)
 188 {
 189         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 190
 191         unsigned level = surf->u.tex.level;
 192         unsigned first_layer = surf->u.tex.first_layer;
 193         assert(surf->u.tex.last_layer == first_layer);
 194         int stride = rsrc->slices[level].stride;
 195
 196         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 197
 198         rt->format = panfrost_mfbd_format(surf);
 199
 200         /* Now, we set the layout specific pieces */
 201
 202         if (rsrc->layout == PAN_LINEAR) {
 203                 rt->format.block = MALI_BLOCK_LINEAR;
 204                 rt->framebuffer = base;
 205                 rt->framebuffer_stride = stride / 16;
 206         } else if (rsrc->layout == PAN_TILED) {
 207                 rt->format.block = MALI_BLOCK_TILED;
 208                 rt->framebuffer = base;
 209                 rt->framebuffer_stride = stride;
 210         } else if (rsrc->layout == PAN_AFBC) {
 211                 rt->format.block = MALI_BLOCK_AFBC;
 212
 213                 unsigned header_size = rsrc->slices[level].header_size;
 214
 215                 rt->framebuffer = base + header_size;
 216                 rt->afbc.metadata = base;
 217                 rt->afbc.stride = 0;
 218                 rt->afbc.unk = 0x30009;
 219
 220                 /* TODO: The blob sets this to something nonzero, but it's not
 221                  * clear what/how to calculate/if it matters */
 222                 rt->framebuffer_stride = 0;
 223         } else {
 224                 fprintf(stderr, "Invalid render layout (cbuf)");
 225                 assert(0);
 226         }
 227 }
 228
 229 static void
 230 panfrost_mfbd_set_zsbuf(
 231         struct bifrost_framebuffer *fb,
 232         struct bifrost_fb_extra *fbx,
 233         struct pipe_surface *surf)
 234 {
 235         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 236
 237         unsigned level = surf->u.tex.level;
 238         assert(surf->u.tex.first_layer == 0);
 239
 240         unsigned offset = rsrc->slices[level].offset;
 241
 242         if (rsrc->layout == PAN_AFBC) {
 243                 /* The only Z/S format we can compress is Z24S8 or variants
 244                  * thereof (handled by the state tracker) */
 245                 assert(panfrost_is_z24s8_variant(surf->format));
 246
 247                 mali_ptr base = rsrc->bo->gpu + offset;
 248                 unsigned header_size = rsrc->slices[level].header_size;
 249
 250                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 251
 252                 fbx->flags =
 253                         MALI_EXTRA_PRESENT |
 254                         MALI_EXTRA_AFBC |
 255                         MALI_EXTRA_AFBC_ZS |
 256                         MALI_EXTRA_ZS |
 257                         0x1; /* unknown */
 258
 259                 fbx->ds_afbc.depth_stencil = base + header_size;
 260                 fbx->ds_afbc.depth_stencil_afbc_metadata = base;
 261                 fbx->ds_afbc.depth_stencil_afbc_stride = 0;
 262
 263                 fbx->ds_afbc.zero1 = 0x10009;
 264                 fbx->ds_afbc.padding = 0x1000;
 265         } else if (rsrc->layout == PAN_LINEAR) {
 266                 /* TODO: Z32F(S8) support, which is always linear */
 267
 268                 int stride = rsrc->slices[level].stride;
 269
 270                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 271                 fbx->flags |= MALI_EXTRA_PRESENT | MALI_EXTRA_ZS;
 272
 273                 fbx->ds_linear.depth = rsrc->bo->gpu + offset;
 274                 fbx->ds_linear.depth_stride = stride;
 275
 276                 if (panfrost_is_z24s8_variant(surf->format)) {
 277                         fbx->flags |= 0x1;
 278                 } else if (surf->format == PIPE_FORMAT_Z32_UNORM) {
 279                         /* default flags (0 in bottom place) */
 280                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT) {
 281                         fbx->flags |= 0xA;
 282                         fb->mfbd_flags ^= 0x100;
 283                         fb->mfbd_flags |= 0x200;
 284                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) {
 285                         fbx->flags |= 0x1000A;
 286                         fb->mfbd_flags ^= 0x100;
 287                         fb->mfbd_flags |= 0x201;
 288
 289                         struct panfrost_resource *stencil = rsrc->separate_stencil;
 290                         struct panfrost_slice stencil_slice = stencil->slices[level];
 291
 292                         fbx->ds_linear.stencil = stencil->bo->gpu + stencil_slice.offset;
 293                         fbx->ds_linear.stencil_stride = stencil_slice.stride;
 294                 }
 295
 296         } else {
 297                 assert(0);
 298         }
 299 }
 300
 301 /* Helper for sequential uploads used for MFBD */
 302
 303 #define UPLOAD(dest, offset, src, max) { \
 304         size_t sz = sizeof(*src); \
 305         memcpy(dest.cpu + offset, src, sz); \
 306         assert((offset + sz) <= max); \
 307         offset += sz; \
 308 }
 309
 310 static mali_ptr
 311 panfrost_mfbd_upload(struct panfrost_batch *batch,
 312         struct bifrost_framebuffer *fb,
 313         struct bifrost_fb_extra *fbx,
 314         struct bifrost_render_target *rts,
 315         unsigned rt_count)
 316 {
 317         off_t offset = 0;
 318
 319         /* There may be extra data stuck in the middle */
 320         bool has_extra = fb->mfbd_flags & MALI_MFBD_EXTRA;
 321
 322         /* Compute total size for transfer */
 323
 324         size_t total_sz =
 325                 sizeof(struct bifrost_framebuffer) +
 326                 (has_extra ? sizeof(struct bifrost_fb_extra) : 0) +
 327                 sizeof(struct bifrost_render_target) * 4;
 328
 329         struct panfrost_transfer m_f_trans =
 330                 panfrost_allocate_transient(batch, total_sz);
 331
 332         /* Do the transfer */
 333
 334         UPLOAD(m_f_trans, offset, fb, total_sz);
 335
 336         if (has_extra)
 337                 UPLOAD(m_f_trans, offset, fbx, total_sz);
 338
 339         for (unsigned c = 0; c < 4; ++c) {
 340                 UPLOAD(m_f_trans, offset, &rts[c], total_sz);
 341         }
 342
 343         /* Return pointer suitable for the fragment section */
 344         unsigned tag =
 345                 MALI_MFBD |
 346                 (has_extra ? MALI_MFBD_TAG_EXTRA : 0) |
 347                 (MALI_POSITIVE(rt_count) << 2);
 348
 349         return m_f_trans.gpu | tag;
 350 }
 351
 352 #undef UPLOAD
 353
 354 /* Creates an MFBD for the FRAGMENT section of the bound framebuffer */
 355
 356 mali_ptr
 357 panfrost_mfbd_fragment(struct panfrost_batch *batch, bool has_draws)
 358 {
 359         struct bifrost_framebuffer fb = panfrost_emit_mfbd(batch, has_draws);
 360         struct bifrost_fb_extra fbx = {};
 361         struct bifrost_render_target rts[4] = {};
 362
 363         /* We always upload at least one dummy GL_NONE render target */
 364
 365         unsigned rt_descriptors = MAX2(batch->key.nr_cbufs, 1);
 366
 367         fb.rt_count_1 = MALI_POSITIVE(rt_descriptors);
 368         fb.rt_count_2 = rt_descriptors;
 369         fb.mfbd_flags = 0x100;
 370
 371         /* TODO: MRT clear */
 372         panfrost_mfbd_clear(batch, &fb, &fbx, rts, fb.rt_count_2);
 373
 374
 375         /* Upload either the render target or a dummy GL_NONE target */
 376
 377         for (int cb = 0; cb < rt_descriptors; ++cb) {
 378                 struct pipe_surface *surf = batch->key.cbufs[cb];
 379
 380                 if (surf) {
 381                         panfrost_mfbd_set_cbuf(&rts[cb], surf);
 382
 383                         /* What is this? Looks like some extension of the bpp
 384                          * field. Maybe it establishes how much internal
 385                          * tilebuffer space is reserved? */
 386
 387                         unsigned bpp = util_format_get_blocksize(surf->format);
 388                         fb.rt_count_2 = MAX2(fb.rt_count_2, ALIGN_POT(bpp, 4) / 4);
 389                 } else {
 390                         struct mali_rt_format null_rt = {
 391                                 .unk1 = 0x4000000,
 392                                 .no_preload = true
 393                         };
 394
 395                         rts[cb].format = null_rt;
 396                         rts[cb].framebuffer = 0;
 397                         rts[cb].framebuffer_stride = 0;
 398                 }
 399
 400                 /* TODO: Break out the field */
 401                 rts[cb].format.unk1 |= (cb * 0x400);
 402         }
 403
 404         if (batch->key.zsbuf) {
 405                 panfrost_mfbd_set_zsbuf(&fb, &fbx, batch->key.zsbuf);
 406         }
 407
 408         /* When scanning out, the depth buffer is immediately invalidated, so
 409          * we don't need to waste bandwidth writing it out. This can improve
 410          * performance substantially (Z32_UNORM 1080p @ 60fps is 475 MB/s of
 411          * memory bandwidth!).
 412          *
 413          * The exception is ReadPixels, but this is not supported on GLES so we
 414          * can safely ignore it. */
 415
 416         if (panfrost_batch_is_scanout(batch))
 417                 batch->requirements &= ~PAN_REQ_DEPTH_WRITE;
 418
 419         /* Actualize the requirements */
 420
 421         if (batch->requirements & PAN_REQ_MSAA) {
 422                 rts[0].format.flags |= MALI_MFBD_FORMAT_MSAA;
 423
 424                 /* XXX */
 425                 fb.unk1 |= (1 << 4) | (1 << 1);
 426                 fb.rt_count_2 = 4;
 427         }
 428
 429         if (batch->requirements & PAN_REQ_DEPTH_WRITE)
 430                 fb.mfbd_flags |= MALI_MFBD_DEPTH_WRITE;
 431
 432         /* Checksumming only works with a single render target */
 433
 434         if (batch->key.nr_cbufs == 1) {
 435                 struct pipe_surface *surf = batch->key.cbufs[0];
 436                 struct panfrost_resource *rsrc = pan_resource(surf->texture);
 437                 struct panfrost_bo *bo = rsrc->bo;
 438
 439                 if (rsrc->checksummed) {
 440                         unsigned level = surf->u.tex.level;
 441                         struct panfrost_slice *slice = &rsrc->slices[level];
 442
 443                         fb.mfbd_flags |= MALI_MFBD_EXTRA;
 444                         fbx.flags |= MALI_EXTRA_PRESENT;
 445                         fbx.checksum_stride = slice->checksum_stride;
 446                         fbx.checksum = bo->gpu + slice->checksum_offset;
 447                 }
 448         }
 449
 450         return panfrost_mfbd_upload(batch, &fb, &fbx, rts, rt_descriptors);
 451 }