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_cmdstream.h"
  28 #include "pan_util.h"
  29 #include "panfrost-quirks.h"
  30
  31 static struct mali_rt_format
  32 panfrost_mfbd_format(struct pipe_surface *surf)
  33 {
  34         struct panfrost_device *dev = pan_device(surf->context->screen);
  35         bool is_bifrost = dev->quirks & IS_BIFROST;
  36
  37         /* Explode details on the format */
  38
  39         const struct util_format_description *desc =
  40                 util_format_description(surf->format);
  41
  42         /* The swizzle for rendering is inverted from texturing */
  43
  44         unsigned char swizzle[4];
  45         panfrost_invert_swizzle(desc->swizzle, swizzle);
  46
  47         /* Fill in accordingly, defaulting to 8-bit UNORM */
  48
  49         struct mali_rt_format fmt = {
  50                 .unk1 = 0x4000000,
  51                 .unk2 = 0x1,
  52                 .nr_channels = MALI_POSITIVE(desc->nr_channels),
  53                 .unk3 = 0x4,
  54                 .unk4 = is_bifrost,
  55                 .flags = 0x8,
  56                 .swizzle = panfrost_translate_swizzle_4(swizzle),
  57                 .no_preload = true
  58         };
  59
  60         if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
  61                 fmt.flags |= MALI_MFBD_FORMAT_SRGB;
  62
  63         /* sRGB handled as a dedicated flag */
  64         enum pipe_format linearized = util_format_linear(surf->format);
  65
  66         /* If RGB, we're good to go */
  67         if (util_format_is_unorm8(desc))
  68                 return fmt;
  69
  70         /* Set flags for alternative formats */
  71
  72         switch (linearized) {
  73         case PIPE_FORMAT_B5G6R5_UNORM:
  74                 fmt.unk1 = 0x14000000;
  75                 fmt.nr_channels = MALI_POSITIVE(2);
  76                 fmt.unk3 |= 0x1;
  77                 break;
  78
  79         case PIPE_FORMAT_A4B4G4R4_UNORM:
  80         case PIPE_FORMAT_B4G4R4A4_UNORM:
  81                 fmt.unk1 = 0x10000000;
  82                 fmt.unk3 = 0x5;
  83                 fmt.nr_channels = MALI_POSITIVE(1);
  84                 break;
  85
  86         case PIPE_FORMAT_R10G10B10A2_UNORM:
  87         case PIPE_FORMAT_B10G10R10A2_UNORM:
  88         case PIPE_FORMAT_R10G10B10X2_UNORM:
  89         case PIPE_FORMAT_B10G10R10X2_UNORM:
  90                 fmt.unk1 = 0x08000000;
  91                 fmt.unk3 = 0x6;
  92                 fmt.nr_channels = MALI_POSITIVE(1);
  93                 break;
  94
  95         case PIPE_FORMAT_B5G5R5A1_UNORM:
  96         case PIPE_FORMAT_B5G5R5X1_UNORM:
  97                 fmt.unk1 = 0x18000000;
  98                 fmt.unk3 = 0x7;
  99                 fmt.nr_channels = MALI_POSITIVE(2);
 100                 break;
 101
 102         /* Generic 8-bit */
 103         case PIPE_FORMAT_R8_UINT:
 104         case PIPE_FORMAT_R8_SINT:
 105                 fmt.unk1 = 0x80000000;
 106                 fmt.unk3 = 0x0;
 107                 fmt.nr_channels = MALI_POSITIVE(1);
 108                 break;
 109
 110         /* Generic 32-bit */
 111         case PIPE_FORMAT_R11G11B10_FLOAT:
 112         case PIPE_FORMAT_R8G8B8A8_UINT:
 113         case PIPE_FORMAT_R8G8B8A8_SINT:
 114         case PIPE_FORMAT_R16G16_FLOAT:
 115         case PIPE_FORMAT_R16G16_UINT:
 116         case PIPE_FORMAT_R16G16_SINT:
 117         case PIPE_FORMAT_R32_FLOAT:
 118         case PIPE_FORMAT_R32_UINT:
 119         case PIPE_FORMAT_R32_SINT:
 120         case PIPE_FORMAT_R10G10B10A2_UINT:
 121                 fmt.unk1 = 0x88000000;
 122                 fmt.unk3 = 0x0;
 123                 fmt.nr_channels = MALI_POSITIVE(4);
 124                 break;
 125
 126         /* Generic 16-bit */
 127         case PIPE_FORMAT_R8G8_UINT:
 128         case PIPE_FORMAT_R8G8_SINT:
 129         case PIPE_FORMAT_R16_FLOAT:
 130         case PIPE_FORMAT_R16_UINT:
 131         case PIPE_FORMAT_R16_SINT:
 132                 fmt.unk1 = 0x84000000;
 133                 fmt.unk3 = 0x0;
 134                 fmt.nr_channels = MALI_POSITIVE(2);
 135                 break;
 136
 137         /* Generic 64-bit */
 138         case PIPE_FORMAT_R32G32_FLOAT:
 139         case PIPE_FORMAT_R32G32_SINT:
 140         case PIPE_FORMAT_R32G32_UINT:
 141         case PIPE_FORMAT_R16G16B16A16_FLOAT:
 142         case PIPE_FORMAT_R16G16B16A16_SINT:
 143         case PIPE_FORMAT_R16G16B16A16_UINT:
 144                 fmt.unk1 = 0x8c000000;
 145                 fmt.unk3 = 0x1;
 146                 fmt.nr_channels = MALI_POSITIVE(2);
 147                 break;
 148
 149         /* Generic 128-bit */
 150         case PIPE_FORMAT_R32G32B32A32_FLOAT:
 151         case PIPE_FORMAT_R32G32B32A32_SINT:
 152         case PIPE_FORMAT_R32G32B32A32_UINT:
 153                 fmt.unk1 = 0x90000000;
 154                 fmt.unk3 = 0x1;
 155                 fmt.nr_channels = MALI_POSITIVE(4);
 156                 break;
 157
 158         default:
 159                 unreachable("Invalid format rendering");
 160         }
 161
 162         return fmt;
 163 }
 164
 165
 166 static void
 167 panfrost_mfbd_clear(
 168         struct panfrost_batch *batch,
 169         struct mali_framebuffer *fb,
 170         struct mali_framebuffer_extra *fbx,
 171         struct mali_render_target *rts,
 172         unsigned rt_count)
 173 {
 174         struct panfrost_context *ctx = batch->ctx;
 175         struct pipe_context *gallium = (struct pipe_context *) ctx;
 176         struct panfrost_device *dev = pan_device(gallium->screen);
 177
 178         for (unsigned i = 0; i < rt_count; ++i) {
 179                 if (!(batch->clear & (PIPE_CLEAR_COLOR0 << i)))
 180                         continue;
 181
 182                 rts[i].clear_color_1 = batch->clear_color[i][0];
 183                 rts[i].clear_color_2 = batch->clear_color[i][1];
 184                 rts[i].clear_color_3 = batch->clear_color[i][2];
 185                 rts[i].clear_color_4 = batch->clear_color[i][3];
 186         }
 187
 188         if (batch->clear & PIPE_CLEAR_DEPTH) {
 189                 fb->clear_depth = batch->clear_depth;
 190         }
 191
 192         if (batch->clear & PIPE_CLEAR_STENCIL) {
 193                 fb->clear_stencil = batch->clear_stencil;
 194         }
 195
 196         if (dev->quirks & IS_BIFROST) {
 197                 fbx->clear_color_1 = batch->clear_color[0][0];
 198                 fbx->clear_color_2 = 0xc0000000 | (fbx->clear_color_1 & 0xffff); /* WTF? */
 199         }
 200 }
 201
 202 static void
 203 panfrost_mfbd_set_cbuf(
 204         struct mali_render_target *rt,
 205         struct pipe_surface *surf)
 206 {
 207         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 208
 209         unsigned level = surf->u.tex.level;
 210         unsigned first_layer = surf->u.tex.first_layer;
 211         assert(surf->u.tex.last_layer == first_layer);
 212         int stride = rsrc->slices[level].stride;
 213
 214         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 215
 216         rt->format = panfrost_mfbd_format(surf);
 217
 218         /* Now, we set the layout specific pieces */
 219
 220         if (rsrc->layout == MALI_TEXTURE_LINEAR) {
 221                 rt->format.block = MALI_BLOCK_LINEAR;
 222                 rt->framebuffer = base;
 223                 rt->framebuffer_stride = stride / 16;
 224         } else if (rsrc->layout == MALI_TEXTURE_TILED) {
 225                 rt->format.block = MALI_BLOCK_TILED;
 226                 rt->framebuffer = base;
 227                 rt->framebuffer_stride = stride;
 228         } else if (rsrc->layout == MALI_TEXTURE_AFBC) {
 229                 rt->format.block = MALI_BLOCK_AFBC;
 230
 231                 unsigned header_size = rsrc->slices[level].header_size;
 232
 233                 rt->framebuffer = base + header_size;
 234                 rt->afbc.metadata = base;
 235                 rt->afbc.stride = 0;
 236                 rt->afbc.unk = 0x30009;
 237
 238                 /* TODO: The blob sets this to something nonzero, but it's not
 239                  * clear what/how to calculate/if it matters */
 240                 rt->framebuffer_stride = 0;
 241         } else {
 242                 fprintf(stderr, "Invalid render layout (cbuf)");
 243                 assert(0);
 244         }
 245 }
 246
 247 static void
 248 panfrost_mfbd_set_zsbuf(
 249         struct mali_framebuffer *fb,
 250         struct mali_framebuffer_extra *fbx,
 251         struct pipe_surface *surf)
 252 {
 253         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 254
 255         unsigned level = surf->u.tex.level;
 256         unsigned first_layer = surf->u.tex.first_layer;
 257         assert(surf->u.tex.last_layer == first_layer);
 258
 259         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 260
 261         if (rsrc->layout == MALI_TEXTURE_AFBC) {
 262                 /* The only Z/S format we can compress is Z24S8 or variants
 263                  * thereof (handled by the gallium frontend) */
 264                 assert(panfrost_is_z24s8_variant(surf->format));
 265
 266                 unsigned header_size = rsrc->slices[level].header_size;
 267
 268                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 269
 270                 fbx->flags_hi |= MALI_EXTRA_PRESENT;
 271                 fbx->flags_lo |= MALI_EXTRA_ZS | 0x1; /* unknown */
 272                 fbx->zs_block = MALI_BLOCK_AFBC;
 273
 274                 fbx->ds_afbc.depth_stencil = base + header_size;
 275                 fbx->ds_afbc.depth_stencil_afbc_metadata = base;
 276                 fbx->ds_afbc.depth_stencil_afbc_stride = 0;
 277
 278                 fbx->ds_afbc.zero1 = 0x10009;
 279                 fbx->ds_afbc.padding = 0x1000;
 280         } else if (rsrc->layout == MALI_TEXTURE_LINEAR || rsrc->layout == MALI_TEXTURE_TILED) {
 281                 /* TODO: Z32F(S8) support, which is always linear */
 282
 283                 int stride = rsrc->slices[level].stride;
 284
 285                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 286                 fbx->flags_hi |= MALI_EXTRA_PRESENT;
 287                 fbx->flags_lo |= MALI_EXTRA_ZS;
 288
 289                 fbx->ds_linear.depth = base;
 290
 291                 if (rsrc->layout == MALI_TEXTURE_LINEAR) {
 292                         fbx->zs_block = MALI_BLOCK_LINEAR;
 293                         fbx->ds_linear.depth_stride = stride / 16;
 294                 } else {
 295                         fbx->zs_block = MALI_BLOCK_TILED;
 296                         fbx->ds_linear.depth_stride = stride;
 297                 }
 298
 299                 if (panfrost_is_z24s8_variant(surf->format)) {
 300                         fbx->flags_lo |= 0x1;
 301                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT) {
 302                         fbx->flags_lo |= 0xA;
 303                         fb->mfbd_flags ^= 0x100;
 304                         fb->mfbd_flags |= 0x200;
 305                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) {
 306                         fbx->flags_hi |= 0x400;
 307                         fbx->flags_lo |= 0xA;
 308                         fb->mfbd_flags ^= 0x100;
 309                         fb->mfbd_flags |= 0x201;
 310
 311                         struct panfrost_resource *stencil = rsrc->separate_stencil;
 312                         struct panfrost_slice stencil_slice = stencil->slices[level];
 313
 314                         fbx->ds_linear.stencil = panfrost_get_texture_address(stencil, level, first_layer);
 315                         fbx->ds_linear.stencil_stride = stencil_slice.stride;
 316                 }
 317
 318         } else {
 319                 assert(0);
 320         }
 321 }
 322
 323 /* Helper for sequential uploads used for MFBD */
 324
 325 #define UPLOAD(dest, offset, src, max) { \
 326         size_t sz = sizeof(*src); \
 327         memcpy(dest.cpu + offset, src, sz); \
 328         assert((offset + sz) <= max); \
 329         offset += sz; \
 330 }
 331
 332 static mali_ptr
 333 panfrost_mfbd_upload(struct panfrost_batch *batch,
 334         struct mali_framebuffer *fb,
 335         struct mali_framebuffer_extra *fbx,
 336         struct mali_render_target *rts,
 337         unsigned rt_count)
 338 {
 339         off_t offset = 0;
 340
 341         /* There may be extra data stuck in the middle */
 342         bool has_extra = fb->mfbd_flags & MALI_MFBD_EXTRA;
 343
 344         /* Compute total size for transfer */
 345
 346         size_t total_sz =
 347                 sizeof(struct mali_framebuffer) +
 348                 (has_extra ? sizeof(struct mali_framebuffer_extra) : 0) +
 349                 sizeof(struct mali_render_target) * 4;
 350
 351         struct panfrost_transfer m_f_trans =
 352                 panfrost_allocate_transient(batch, total_sz);
 353
 354         /* Do the transfer */
 355
 356         UPLOAD(m_f_trans, offset, fb, total_sz);
 357
 358         if (has_extra)
 359                 UPLOAD(m_f_trans, offset, fbx, total_sz);
 360
 361         for (unsigned c = 0; c < 4; ++c) {
 362                 UPLOAD(m_f_trans, offset, &rts[c], total_sz);
 363         }
 364
 365         /* Return pointer suitable for the fragment section */
 366         unsigned tag =
 367                 MALI_MFBD |
 368                 (has_extra ? MALI_MFBD_TAG_EXTRA : 0) |
 369                 (MALI_POSITIVE(rt_count) << 2);
 370
 371         return m_f_trans.gpu | tag;
 372 }
 373
 374 #undef UPLOAD
 375
 376 static struct mali_framebuffer
 377 panfrost_emit_mfbd(struct panfrost_batch *batch, unsigned vertex_count)
 378 {
 379         struct panfrost_context *ctx = batch->ctx;
 380         struct pipe_context *gallium = (struct pipe_context *) ctx;
 381         struct panfrost_device *dev = pan_device(gallium->screen);
 382
 383         unsigned width = batch->key.width;
 384         unsigned height = batch->key.height;
 385
 386         struct mali_framebuffer mfbd = {
 387                 .width1 = MALI_POSITIVE(width),
 388                 .height1 = MALI_POSITIVE(height),
 389                 .width2 = MALI_POSITIVE(width),
 390                 .height2 = MALI_POSITIVE(height),
 391
 392                 .unk1 = 0x1080,
 393
 394                 .rt_count_1 = MALI_POSITIVE(batch->key.nr_cbufs),
 395                 .rt_count_2 = 4,
 396         };
 397
 398         if (dev->quirks & IS_BIFROST) {
 399                 mfbd.msaa.sample_locations = panfrost_emit_sample_locations(batch);
 400                 mfbd.tiler_meta = panfrost_batch_get_tiler_meta(batch, vertex_count);
 401         } else {
 402                 unsigned shift = panfrost_get_stack_shift(batch->stack_size);
 403                 struct panfrost_bo *bo = panfrost_batch_get_scratchpad(batch,
 404                                                                        shift,
 405                                                                        dev->thread_tls_alloc,
 406                                                                        dev->core_count);
 407                 mfbd.shared_memory.stack_shift = shift;
 408                 mfbd.shared_memory.scratchpad = bo->gpu;
 409                 mfbd.shared_memory.shared_workgroup_count = ~0;
 410
 411                 mfbd.tiler = panfrost_emit_midg_tiler(batch, vertex_count);
 412         }
 413
 414         return mfbd;
 415 }
 416
 417 void
 418 panfrost_attach_mfbd(struct panfrost_batch *batch, unsigned vertex_count)
 419 {
 420         struct mali_framebuffer mfbd =
 421                 panfrost_emit_mfbd(batch, vertex_count);
 422
 423         memcpy(batch->framebuffer.cpu, &mfbd, sizeof(mfbd));
 424 }
 425
 426 /* Creates an MFBD for the FRAGMENT section of the bound framebuffer */
 427
 428 mali_ptr
 429 panfrost_mfbd_fragment(struct panfrost_batch *batch, bool has_draws)
 430 {
 431         struct mali_framebuffer fb = panfrost_emit_mfbd(batch, has_draws);
 432         struct mali_framebuffer_extra fbx = {0};
 433         struct mali_render_target rts[4] = {0};
 434
 435         /* We always upload at least one dummy GL_NONE render target */
 436
 437         unsigned rt_descriptors = MAX2(batch->key.nr_cbufs, 1);
 438
 439         fb.rt_count_1 = MALI_POSITIVE(rt_descriptors);
 440         fb.rt_count_2 = rt_descriptors;
 441         fb.mfbd_flags = 0x100;
 442
 443         /* TODO: MRT clear */
 444         panfrost_mfbd_clear(batch, &fb, &fbx, rts, fb.rt_count_2);
 445
 446
 447         /* Upload either the render target or a dummy GL_NONE target */
 448
 449         for (int cb = 0; cb < rt_descriptors; ++cb) {
 450                 struct pipe_surface *surf = batch->key.cbufs[cb];
 451
 452                 if (surf) {
 453                         panfrost_mfbd_set_cbuf(&rts[cb], surf);
 454
 455                         /* What is this? Looks like some extension of the bpp
 456                          * field. Maybe it establishes how much internal
 457                          * tilebuffer space is reserved? */
 458
 459                         unsigned bpp = util_format_get_blocksize(surf->format);
 460                         fb.rt_count_2 = MAX2(fb.rt_count_2, ALIGN_POT(bpp, 4) / 4);
 461                 } else {
 462                         struct mali_rt_format null_rt = {
 463                                 .unk1 = 0x4000000,
 464                                 .no_preload = true
 465                         };
 466
 467                         rts[cb].format = null_rt;
 468                         rts[cb].framebuffer = 0;
 469                         rts[cb].framebuffer_stride = 0;
 470                 }
 471
 472                 /* TODO: Break out the field */
 473                 rts[cb].format.unk1 |= (cb * 0x400);
 474         }
 475
 476         if (batch->key.zsbuf) {
 477                 panfrost_mfbd_set_zsbuf(&fb, &fbx, batch->key.zsbuf);
 478         }
 479
 480         /* When scanning out, the depth buffer is immediately invalidated, so
 481          * we don't need to waste bandwidth writing it out. This can improve
 482          * performance substantially (Z24X8_UNORM 1080p @ 60fps is 475 MB/s of
 483          * memory bandwidth!).
 484          *
 485          * The exception is ReadPixels, but this is not supported on GLES so we
 486          * can safely ignore it. */
 487
 488         if (panfrost_batch_is_scanout(batch))
 489                 batch->requirements &= ~PAN_REQ_DEPTH_WRITE;
 490
 491         /* Actualize the requirements */
 492
 493         if (batch->requirements & PAN_REQ_MSAA) {
 494                 rts[0].format.flags |= MALI_MFBD_FORMAT_MSAA;
 495
 496                 /* XXX */
 497                 fb.unk1 |= (1 << 4) | (1 << 1);
 498                 fb.rt_count_2 = 4;
 499         }
 500
 501         if (batch->requirements & PAN_REQ_DEPTH_WRITE)
 502                 fb.mfbd_flags |= MALI_MFBD_DEPTH_WRITE;
 503
 504         /* Checksumming only works with a single render target */
 505
 506         if (batch->key.nr_cbufs == 1) {
 507                 struct pipe_surface *surf = batch->key.cbufs[0];
 508                 struct panfrost_resource *rsrc = pan_resource(surf->texture);
 509
 510                 if (rsrc->checksummed) {
 511                         unsigned level = surf->u.tex.level;
 512                         struct panfrost_slice *slice = &rsrc->slices[level];
 513
 514                         fb.mfbd_flags |= MALI_MFBD_EXTRA;
 515                         fbx.flags_lo |= MALI_EXTRA_PRESENT;
 516                         fbx.checksum_stride = slice->checksum_stride;
 517                         if (slice->checksum_bo)
 518                                 fbx.checksum = slice->checksum_bo->gpu;
 519                         else
 520                                 fbx.checksum = rsrc->bo->gpu + slice->checksum_offset;
 521                 }
 522         }
 523
 524         return panfrost_mfbd_upload(batch, &fb, &fbx, rts, rt_descriptors);
 525 }