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         unsigned first_layer = surf->u.tex.first_layer;
 239         assert(surf->u.tex.last_layer == first_layer);
 240
 241         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 242
 243         if (rsrc->layout == PAN_AFBC) {
 244                 /* The only Z/S format we can compress is Z24S8 or variants
 245                  * thereof (handled by the state tracker) */
 246                 assert(panfrost_is_z24s8_variant(surf->format));
 247
 248                 unsigned header_size = rsrc->slices[level].header_size;
 249
 250                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 251
 252                 fbx->flags_hi |= MALI_EXTRA_PRESENT;
 253                 fbx->flags_lo |= MALI_EXTRA_ZS | 0x1; /* unknown */
 254                 fbx->zs_block = MALI_BLOCK_AFBC;
 255
 256                 fbx->ds_afbc.depth_stencil = base + header_size;
 257                 fbx->ds_afbc.depth_stencil_afbc_metadata = base;
 258                 fbx->ds_afbc.depth_stencil_afbc_stride = 0;
 259
 260                 fbx->ds_afbc.zero1 = 0x10009;
 261                 fbx->ds_afbc.padding = 0x1000;
 262         } else if (rsrc->layout == PAN_LINEAR || rsrc->layout == PAN_TILED) {
 263                 /* TODO: Z32F(S8) support, which is always linear */
 264
 265                 int stride = rsrc->slices[level].stride;
 266
 267                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 268                 fbx->flags_hi |= MALI_EXTRA_PRESENT;
 269                 fbx->flags_lo |= MALI_EXTRA_ZS;
 270
 271                 fbx->ds_linear.depth = base;
 272
 273                 if (rsrc->layout == PAN_LINEAR) {
 274                         fbx->zs_block = MALI_BLOCK_LINEAR;
 275                         fbx->ds_linear.depth_stride = stride / 16;
 276                 } else {
 277                         fbx->zs_block = MALI_BLOCK_TILED;
 278                         fbx->ds_linear.depth_stride = stride;
 279                 }
 280
 281                 if (panfrost_is_z24s8_variant(surf->format)) {
 282                         fbx->flags_lo |= 0x1;
 283                 } else if (surf->format == PIPE_FORMAT_Z32_UNORM) {
 284                         /* default flags (0 in bottom place) */
 285                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT) {
 286                         fbx->flags_lo |= 0xA;
 287                         fb->mfbd_flags ^= 0x100;
 288                         fb->mfbd_flags |= 0x200;
 289                 } else if (surf->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) {
 290                         fbx->flags_hi |= 0x400;
 291                         fbx->flags_lo |= 0xA;
 292                         fb->mfbd_flags ^= 0x100;
 293                         fb->mfbd_flags |= 0x201;
 294
 295                         struct panfrost_resource *stencil = rsrc->separate_stencil;
 296                         struct panfrost_slice stencil_slice = stencil->slices[level];
 297
 298                         fbx->ds_linear.stencil = panfrost_get_texture_address(stencil, level, first_layer);
 299                         fbx->ds_linear.stencil_stride = stencil_slice.stride;
 300                 }
 301
 302         } else {
 303                 assert(0);
 304         }
 305 }
 306
 307 /* Helper for sequential uploads used for MFBD */
 308
 309 #define UPLOAD(dest, offset, src, max) { \
 310         size_t sz = sizeof(*src); \
 311         memcpy(dest.cpu + offset, src, sz); \
 312         assert((offset + sz) <= max); \
 313         offset += sz; \
 314 }
 315
 316 static mali_ptr
 317 panfrost_mfbd_upload(struct panfrost_batch *batch,
 318         struct bifrost_framebuffer *fb,
 319         struct bifrost_fb_extra *fbx,
 320         struct bifrost_render_target *rts,
 321         unsigned rt_count)
 322 {
 323         off_t offset = 0;
 324
 325         /* There may be extra data stuck in the middle */
 326         bool has_extra = fb->mfbd_flags & MALI_MFBD_EXTRA;
 327
 328         /* Compute total size for transfer */
 329
 330         size_t total_sz =
 331                 sizeof(struct bifrost_framebuffer) +
 332                 (has_extra ? sizeof(struct bifrost_fb_extra) : 0) +
 333                 sizeof(struct bifrost_render_target) * 4;
 334
 335         struct panfrost_transfer m_f_trans =
 336                 panfrost_allocate_transient(batch, total_sz);
 337
 338         /* Do the transfer */
 339
 340         UPLOAD(m_f_trans, offset, fb, total_sz);
 341
 342         if (has_extra)
 343                 UPLOAD(m_f_trans, offset, fbx, total_sz);
 344
 345         for (unsigned c = 0; c < 4; ++c) {
 346                 UPLOAD(m_f_trans, offset, &rts[c], total_sz);
 347         }
 348
 349         /* Return pointer suitable for the fragment section */
 350         unsigned tag =
 351                 MALI_MFBD |
 352                 (has_extra ? MALI_MFBD_TAG_EXTRA : 0) |
 353                 (MALI_POSITIVE(rt_count) << 2);
 354
 355         return m_f_trans.gpu | tag;
 356 }
 357
 358 #undef UPLOAD
 359
 360 static struct bifrost_framebuffer
 361 panfrost_emit_mfbd(struct panfrost_batch *batch, unsigned vertex_count)
 362 {
 363         struct panfrost_context *ctx = batch->ctx;
 364         struct pipe_context *gallium = (struct pipe_context *) ctx;
 365         struct panfrost_screen *screen = pan_screen(gallium->screen);
 366
 367         unsigned width = batch->key.width;
 368         unsigned height = batch->key.height;
 369
 370         unsigned shift = panfrost_get_stack_shift(batch->stack_size);
 371
 372         struct bifrost_framebuffer framebuffer = {
 373                 .width1 = MALI_POSITIVE(width),
 374                 .height1 = MALI_POSITIVE(height),
 375                 .width2 = MALI_POSITIVE(width),
 376                 .height2 = MALI_POSITIVE(height),
 377
 378                 .unk1 = 0x1080,
 379
 380                 .rt_count_1 = MALI_POSITIVE(batch->key.nr_cbufs),
 381                 .rt_count_2 = 4,
 382
 383                 .unknown2 = 0x1f,
 384                 .tiler = panfrost_emit_midg_tiler(batch, vertex_count),
 385
 386                 .stack_shift = shift,
 387                 .unk0 = 0x1e,
 388                 .scratchpad = panfrost_batch_get_scratchpad(batch, shift, screen->thread_tls_alloc, screen->core_count)->gpu
 389         };
 390
 391         return framebuffer;
 392 }
 393
 394 void
 395 panfrost_attach_mfbd(struct panfrost_batch *batch, unsigned vertex_count)
 396 {
 397         struct bifrost_framebuffer mfbd =
 398                 panfrost_emit_mfbd(batch, vertex_count);
 399
 400         memcpy(batch->framebuffer.cpu, &mfbd, sizeof(mfbd));
 401 }
 402
 403 /* Creates an MFBD for the FRAGMENT section of the bound framebuffer */
 404
 405 mali_ptr
 406 panfrost_mfbd_fragment(struct panfrost_batch *batch, bool has_draws)
 407 {
 408         struct bifrost_framebuffer fb = panfrost_emit_mfbd(batch, has_draws);
 409         struct bifrost_fb_extra fbx = {0};
 410         struct bifrost_render_target rts[4] = {0};
 411
 412         /* We always upload at least one dummy GL_NONE render target */
 413
 414         unsigned rt_descriptors = MAX2(batch->key.nr_cbufs, 1);
 415
 416         fb.rt_count_1 = MALI_POSITIVE(rt_descriptors);
 417         fb.rt_count_2 = rt_descriptors;
 418         fb.mfbd_flags = 0x100;
 419
 420         /* TODO: MRT clear */
 421         panfrost_mfbd_clear(batch, &fb, &fbx, rts, fb.rt_count_2);
 422
 423
 424         /* Upload either the render target or a dummy GL_NONE target */
 425
 426         for (int cb = 0; cb < rt_descriptors; ++cb) {
 427                 struct pipe_surface *surf = batch->key.cbufs[cb];
 428
 429                 if (surf) {
 430                         panfrost_mfbd_set_cbuf(&rts[cb], surf);
 431
 432                         /* What is this? Looks like some extension of the bpp
 433                          * field. Maybe it establishes how much internal
 434                          * tilebuffer space is reserved? */
 435
 436                         unsigned bpp = util_format_get_blocksize(surf->format);
 437                         fb.rt_count_2 = MAX2(fb.rt_count_2, ALIGN_POT(bpp, 4) / 4);
 438                 } else {
 439                         struct mali_rt_format null_rt = {
 440                                 .unk1 = 0x4000000,
 441                                 .no_preload = true
 442                         };
 443
 444                         rts[cb].format = null_rt;
 445                         rts[cb].framebuffer = 0;
 446                         rts[cb].framebuffer_stride = 0;
 447                 }
 448
 449                 /* TODO: Break out the field */
 450                 rts[cb].format.unk1 |= (cb * 0x400);
 451         }
 452
 453         if (batch->key.zsbuf) {
 454                 panfrost_mfbd_set_zsbuf(&fb, &fbx, batch->key.zsbuf);
 455         }
 456
 457         /* When scanning out, the depth buffer is immediately invalidated, so
 458          * we don't need to waste bandwidth writing it out. This can improve
 459          * performance substantially (Z32_UNORM 1080p @ 60fps is 475 MB/s of
 460          * memory bandwidth!).
 461          *
 462          * The exception is ReadPixels, but this is not supported on GLES so we
 463          * can safely ignore it. */
 464
 465         if (panfrost_batch_is_scanout(batch))
 466                 batch->requirements &= ~PAN_REQ_DEPTH_WRITE;
 467
 468         /* Actualize the requirements */
 469
 470         if (batch->requirements & PAN_REQ_MSAA) {
 471                 rts[0].format.flags |= MALI_MFBD_FORMAT_MSAA;
 472
 473                 /* XXX */
 474                 fb.unk1 |= (1 << 4) | (1 << 1);
 475                 fb.rt_count_2 = 4;
 476         }
 477
 478         if (batch->requirements & PAN_REQ_DEPTH_WRITE)
 479                 fb.mfbd_flags |= MALI_MFBD_DEPTH_WRITE;
 480
 481         /* Checksumming only works with a single render target */
 482
 483         if (batch->key.nr_cbufs == 1) {
 484                 struct pipe_surface *surf = batch->key.cbufs[0];
 485                 struct panfrost_resource *rsrc = pan_resource(surf->texture);
 486                 struct panfrost_bo *bo = rsrc->bo;
 487
 488                 if (rsrc->checksummed) {
 489                         unsigned level = surf->u.tex.level;
 490                         struct panfrost_slice *slice = &rsrc->slices[level];
 491
 492                         fb.mfbd_flags |= MALI_MFBD_EXTRA;
 493                         fbx.flags_lo |= MALI_EXTRA_PRESENT;
 494                         fbx.checksum_stride = slice->checksum_stride;
 495                         fbx.checksum = bo->gpu + slice->checksum_offset;
 496                 }
 497         }
 498
 499         return panfrost_mfbd_upload(batch, &fb, &fbx, rts, rt_descriptors);
 500 }