src/gallium/drivers/panfrost/pan_resource.c

   1 /*
   2  * Copyright (C) 2008 VMware, Inc.
   3  * Copyright (C) 2014 Broadcom
   4  * Copyright (C) 2018-2019 Alyssa Rosenzweig
   5  * Copyright (C) 2019 Collabora
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  *
  26  * Authors (Collabora):
  27  *   Tomeu Vizoso <tomeu.vizoso@collabora.com>
  28  *   Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
  29  *
  30  */
  31
  32 #include <xf86drm.h>
  33 #include <fcntl.h>
  34 #include "drm-uapi/drm_fourcc.h"
  35
  36 #include "state_tracker/winsys_handle.h"
  37 #include "util/u_format.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_surface.h"
  40 #include "util/u_transfer.h"
  41 #include "util/u_transfer_helper.h"
  42 #include "util/u_gen_mipmap.h"
  43
  44 #include "pan_context.h"
  45 #include "pan_screen.h"
  46 #include "pan_resource.h"
  47 #include "pan_util.h"
  48 #include "pan_tiling.h"
  49
  50 static struct pipe_resource *
  51 panfrost_resource_from_handle(struct pipe_screen *pscreen,
  52                               const struct pipe_resource *templat,
  53                               struct winsys_handle *whandle,
  54                               unsigned usage)
  55 {
  56         struct panfrost_screen *screen = pan_screen(pscreen);
  57         struct panfrost_resource *rsc;
  58         struct pipe_resource *prsc;
  59
  60         assert(whandle->type == WINSYS_HANDLE_TYPE_FD);
  61
  62         rsc = rzalloc(pscreen, struct panfrost_resource);
  63         if (!rsc)
  64                 return NULL;
  65
  66         prsc = &rsc->base;
  67
  68         *prsc = *templat;
  69
  70         pipe_reference_init(&prsc->reference, 1);
  71         prsc->screen = pscreen;
  72
  73         rsc->bo = panfrost_drm_import_bo(screen, whandle);
  74         rsc->bo->slices[0].stride = whandle->stride;
  75         rsc->bo->slices[0].initialized = true;
  76
  77         if (screen->ro) {
  78                 rsc->scanout =
  79                         renderonly_create_gpu_import_for_resource(prsc, screen->ro, NULL);
  80                 /* failure is expected in some cases.. */
  81         }
  82
  83         return prsc;
  84 }
  85
  86 static boolean
  87 panfrost_resource_get_handle(struct pipe_screen *pscreen,
  88                              struct pipe_context *ctx,
  89                              struct pipe_resource *pt,
  90                              struct winsys_handle *handle,
  91                              unsigned usage)
  92 {
  93         struct panfrost_screen *screen = pan_screen(pscreen);
  94         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
  95         struct renderonly_scanout *scanout = rsrc->scanout;
  96
  97         handle->modifier = DRM_FORMAT_MOD_INVALID;
  98
  99         if (handle->type == WINSYS_HANDLE_TYPE_SHARED) {
 100                 return FALSE;
 101         } else if (handle->type == WINSYS_HANDLE_TYPE_KMS) {
 102                 if (renderonly_get_handle(scanout, handle))
 103                         return TRUE;
 104
 105                 handle->handle = rsrc->bo->gem_handle;
 106                 handle->stride = rsrc->bo->slices[0].stride;
 107                 return TRUE;
 108         } else if (handle->type == WINSYS_HANDLE_TYPE_FD) {
 109                 if (scanout) {
 110                         struct drm_prime_handle args = {
 111                                 .handle = scanout->handle,
 112                                 .flags = DRM_CLOEXEC,
 113                         };
 114
 115                         int ret = drmIoctl(screen->ro->kms_fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 116                         if (ret == -1)
 117                                 return FALSE;
 118
 119                         handle->stride = scanout->stride;
 120                         handle->handle = args.fd;
 121
 122                         return TRUE;
 123                 } else
 124                         return panfrost_drm_export_bo(screen, rsrc->bo->gem_handle,
 125                                                       rsrc->bo->slices[0].stride,
 126                                                       handle);
 127         }
 128
 129         return FALSE;
 130 }
 131
 132 static void
 133 panfrost_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 134 {
 135         //DBG("TODO %s\n", __func__);
 136 }
 137
 138 static struct pipe_surface *
 139 panfrost_create_surface(struct pipe_context *pipe,
 140                         struct pipe_resource *pt,
 141                         const struct pipe_surface *surf_tmpl)
 142 {
 143         struct pipe_surface *ps = NULL;
 144
 145         ps = rzalloc(pipe, struct pipe_surface);
 146
 147         if (ps) {
 148                 pipe_reference_init(&ps->reference, 1);
 149                 pipe_resource_reference(&ps->texture, pt);
 150                 ps->context = pipe;
 151                 ps->format = surf_tmpl->format;
 152
 153                 if (pt->target != PIPE_BUFFER) {
 154                         assert(surf_tmpl->u.tex.level <= pt->last_level);
 155                         ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 156                         ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 157                         ps->u.tex.level = surf_tmpl->u.tex.level;
 158                         ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 159                         ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 160                 } else {
 161                         /* setting width as number of elements should get us correct renderbuffer width */
 162                         ps->width = surf_tmpl->u.buf.last_element - surf_tmpl->u.buf.first_element + 1;
 163                         ps->height = pt->height0;
 164                         ps->u.buf.first_element = surf_tmpl->u.buf.first_element;
 165                         ps->u.buf.last_element = surf_tmpl->u.buf.last_element;
 166                         assert(ps->u.buf.first_element <= ps->u.buf.last_element);
 167                         assert(ps->u.buf.last_element < ps->width);
 168                 }
 169         }
 170
 171         return ps;
 172 }
 173
 174 static void
 175 panfrost_surface_destroy(struct pipe_context *pipe,
 176                          struct pipe_surface *surf)
 177 {
 178         assert(surf->texture);
 179         pipe_resource_reference(&surf->texture, NULL);
 180         ralloc_free(surf);
 181 }
 182
 183 static void
 184 panfrost_setup_slices(const struct pipe_resource *tmpl, struct panfrost_bo *bo)
 185 {
 186         unsigned width = tmpl->width0;
 187         unsigned height = tmpl->height0;
 188         unsigned depth = tmpl->depth0;
 189         unsigned bytes_per_pixel = util_format_get_blocksize(tmpl->format);
 190
 191         assert(depth > 0);
 192
 193         /* Tiled operates blockwise; linear is packed. Also, anything
 194          * we render to has to be tile-aligned. Maybe not strictly
 195          * necessary, but we're not *that* pressed for memory and it
 196          * makes code a lot simpler */
 197
 198         bool renderable = tmpl->bind &
 199                 (PIPE_BIND_RENDER_TARGET | PIPE_BIND_DEPTH_STENCIL);
 200         bool tiled = bo->layout == PAN_TILED;
 201         bool should_align = renderable || tiled;
 202
 203         /* We don't know how to specify a 2D stride for 3D textures */
 204
 205         bool can_align_stride =
 206                 tmpl->target != PIPE_TEXTURE_3D;
 207
 208         should_align &= can_align_stride;
 209
 210         unsigned offset = 0;
 211         unsigned size_2d = 0;
 212
 213         for (unsigned l = 0; l <= tmpl->last_level; ++l) {
 214                 struct panfrost_slice *slice = &bo->slices[l];
 215
 216                 unsigned effective_width = width;
 217                 unsigned effective_height = height;
 218                 unsigned effective_depth = depth;
 219
 220                 if (should_align) {
 221                         effective_width = ALIGN(effective_width, 16);
 222                         effective_height = ALIGN(effective_height, 16);
 223
 224                         /* We don't need to align depth */
 225                 }
 226
 227                 slice->offset = offset;
 228
 229                 /* Compute the would-be stride */
 230                 unsigned stride = bytes_per_pixel * effective_width;
 231
 232                 /* ..but cache-line align it for performance */
 233                 if (can_align_stride && bo->layout == PAN_LINEAR)
 234                         stride = ALIGN(stride, 64);
 235
 236                 slice->stride = stride;
 237
 238                 unsigned slice_one_size = slice->stride * effective_height;
 239                 unsigned slice_full_size = slice_one_size * effective_depth;
 240
 241                 /* Report 2D size for 3D texturing */
 242
 243                 if (l == 0)
 244                         size_2d = slice_one_size;
 245
 246                 offset += slice_full_size;
 247
 248                 width = u_minify(width, 1);
 249                 height = u_minify(height, 1);
 250                 depth = u_minify(depth, 1);
 251         }
 252
 253         assert(tmpl->array_size);
 254
 255         if (tmpl->target != PIPE_TEXTURE_3D) {
 256                 /* Arrays and cubemaps have the entire miptree duplicated */
 257
 258                 bo->cubemap_stride = ALIGN(offset, 64);
 259                 bo->size = ALIGN(bo->cubemap_stride * tmpl->array_size, 4096);
 260         } else {
 261                 /* 3D strides across the 2D layers */
 262                 assert(tmpl->array_size == 1);
 263
 264                 bo->cubemap_stride = size_2d;
 265                 bo->size = ALIGN(offset, 4096);
 266         }
 267 }
 268
 269 static struct panfrost_bo *
 270 panfrost_create_bo(struct panfrost_screen *screen, const struct pipe_resource *template)
 271 {
 272         struct panfrost_bo *bo = rzalloc(screen, struct panfrost_bo);
 273         pipe_reference_init(&bo->reference, 1);
 274
 275         /* Based on the usage, figure out what storing will be used. There are
 276          * various tradeoffs:
 277          *
 278          * Linear: the basic format, bad for memory bandwidth, bad for cache
 279          * use. Zero-copy, though. Renderable.
 280          *
 281          * Tiled: Not compressed, but cache-optimized. Expensive to write into
 282          * (due to software tiling), but cheap to sample from. Ideal for most
 283          * textures.
 284          *
 285          * AFBC: Compressed and renderable (so always desirable for non-scanout
 286          * rendertargets). Cheap to sample from. The format is black box, so we
 287          * can't read/write from software.
 288          */
 289
 290         /* Tiling textures is almost always faster, unless we only use it once */
 291
 292         bool is_texture = (template->bind & PIPE_BIND_SAMPLER_VIEW);
 293         bool is_2d = template->depth0 == 1 && template->array_size == 1;
 294         bool is_streaming = (template->usage != PIPE_USAGE_STREAM);
 295
 296         bool should_tile = is_streaming && is_texture && is_2d;
 297
 298         /* Set the layout appropriately */
 299         bo->layout = should_tile ? PAN_TILED : PAN_LINEAR;
 300
 301         panfrost_setup_slices(template, bo);
 302
 303         if (bo->layout == PAN_TILED || bo->layout == PAN_LINEAR) {
 304                 struct panfrost_memory mem;
 305
 306                 panfrost_drm_allocate_slab(screen, &mem, bo->size / 4096, true, 0, 0, 0);
 307
 308                 bo->cpu = mem.cpu;
 309                 bo->gpu = mem.gpu;
 310                 bo->gem_handle = mem.gem_handle;
 311         }
 312
 313         return bo;
 314 }
 315
 316 static struct pipe_resource *
 317 panfrost_resource_create(struct pipe_screen *screen,
 318                          const struct pipe_resource *template)
 319 {
 320         struct panfrost_resource *so = rzalloc(screen, struct panfrost_resource);
 321         struct panfrost_screen *pscreen = (struct panfrost_screen *) screen;
 322
 323         so->base = *template;
 324         so->base.screen = screen;
 325
 326         pipe_reference_init(&so->base.reference, 1);
 327
 328         /* Make sure we're familiar */
 329         switch (template->target) {
 330                 case PIPE_BUFFER:
 331                 case PIPE_TEXTURE_1D:
 332                 case PIPE_TEXTURE_2D:
 333                 case PIPE_TEXTURE_3D:
 334                 case PIPE_TEXTURE_CUBE:
 335                 case PIPE_TEXTURE_RECT:
 336                 case PIPE_TEXTURE_2D_ARRAY:
 337                         break;
 338                 default:
 339                         DBG("Unknown texture target %d\n", template->target);
 340                         assert(0);
 341         }
 342
 343         util_range_init(&so->valid_buffer_range);
 344
 345         if (template->bind & PIPE_BIND_DISPLAY_TARGET ||
 346             template->bind & PIPE_BIND_SCANOUT ||
 347             template->bind & PIPE_BIND_SHARED) {
 348                 struct pipe_resource scanout_templat = *template;
 349                 struct renderonly_scanout *scanout;
 350                 struct winsys_handle handle;
 351
 352                 scanout = renderonly_scanout_for_resource(&scanout_templat,
 353                                                           pscreen->ro, &handle);
 354                 if (!scanout)
 355                         return NULL;
 356
 357                 assert(handle.type == WINSYS_HANDLE_TYPE_FD);
 358                 /* TODO: handle modifiers? */
 359                 so = pan_resource(screen->resource_from_handle(screen, template,
 360                                                                  &handle,
 361                                                                  PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE));
 362                 close(handle.handle);
 363                 if (!so)
 364                         return NULL;
 365
 366                 so->scanout = scanout;
 367                 pscreen->display_target = so;
 368         } else {
 369                 so->bo = panfrost_create_bo(pscreen, template);
 370         }
 371
 372         return (struct pipe_resource *)so;
 373 }
 374
 375 static void
 376 panfrost_destroy_bo(struct panfrost_screen *screen, struct panfrost_bo *bo)
 377 {
 378         if ((bo->layout == PAN_LINEAR || bo->layout == PAN_TILED) &&
 379                         !bo->imported) {
 380                 struct panfrost_memory mem = {
 381                         .cpu = bo->cpu,
 382                         .gpu = bo->gpu,
 383                         .size = bo->size,
 384                         .gem_handle = bo->gem_handle,
 385                 };
 386
 387                 panfrost_drm_free_slab(screen, &mem);
 388         }
 389
 390         if (bo->layout == PAN_AFBC) {
 391                 /* TODO */
 392                 DBG("--leaking afbc (%d bytes)--\n", bo->afbc_metadata_size);
 393         }
 394
 395         if (bo->has_checksum) {
 396                 struct panfrost_memory mem = {
 397                         .cpu = bo->checksum_slab.cpu,
 398                         .gpu = bo->checksum_slab.gpu,
 399                         .size = bo->checksum_slab.size,
 400                         .gem_handle = bo->checksum_slab.gem_handle,
 401                 };
 402
 403                 panfrost_drm_free_slab(screen, &mem);
 404         }
 405
 406         if (bo->imported) {
 407                 panfrost_drm_free_imported_bo(screen, bo);
 408         }
 409
 410         ralloc_free(bo);
 411 }
 412
 413 void
 414 panfrost_bo_reference(struct panfrost_bo *bo)
 415 {
 416         pipe_reference(NULL, &bo->reference);
 417 }
 418
 419 void
 420 panfrost_bo_unreference(struct pipe_screen *screen, struct panfrost_bo *bo)
 421 {
 422         /* When the reference count goes to zero, we need to cleanup */
 423
 424         if (pipe_reference(&bo->reference, NULL)) {
 425                 panfrost_destroy_bo(pan_screen(screen), bo);
 426         }
 427 }
 428
 429 static void
 430 panfrost_resource_destroy(struct pipe_screen *screen,
 431                           struct pipe_resource *pt)
 432 {
 433         struct panfrost_screen *pscreen = pan_screen(screen);
 434         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
 435
 436         if (rsrc->scanout)
 437                 renderonly_scanout_destroy(rsrc->scanout, pscreen->ro);
 438
 439         if (rsrc->bo)
 440                 panfrost_bo_unreference(screen, rsrc->bo);
 441
 442         util_range_destroy(&rsrc->valid_buffer_range);
 443         ralloc_free(rsrc);
 444 }
 445
 446 static void *
 447 panfrost_transfer_map(struct pipe_context *pctx,
 448                       struct pipe_resource *resource,
 449                       unsigned level,
 450                       unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 451                       const struct pipe_box *box,
 452                       struct pipe_transfer **out_transfer)
 453 {
 454         int bytes_per_pixel = util_format_get_blocksize(resource->format);
 455         struct panfrost_resource *rsrc = pan_resource(resource);
 456         struct panfrost_bo *bo = rsrc->bo;
 457
 458         struct panfrost_gtransfer *transfer = rzalloc(pctx, struct panfrost_gtransfer);
 459         transfer->base.level = level;
 460         transfer->base.usage = usage;
 461         transfer->base.box = *box;
 462
 463         pipe_resource_reference(&transfer->base.resource, resource);
 464
 465         *out_transfer = &transfer->base;
 466
 467         /* Check if we're bound for rendering and this is a read pixels. If so,
 468          * we need to flush */
 469
 470         struct panfrost_context *ctx = pan_context(pctx);
 471         struct pipe_framebuffer_state *fb = &ctx->pipe_framebuffer;
 472
 473         bool is_bound = false;
 474
 475         for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
 476                 is_bound |= fb->cbufs[c]->texture == resource;
 477         }
 478
 479         if (is_bound && (usage & PIPE_TRANSFER_READ)) {
 480                 assert(level == 0);
 481                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 482         }
 483
 484         /* TODO: Respect usage flags */
 485
 486         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
 487                 /* TODO: reallocate */
 488                 //printf("debug: Missed reallocate\n");
 489         } else if ((usage & PIPE_TRANSFER_WRITE)
 490                         && resource->target == PIPE_BUFFER
 491                         && !util_ranges_intersect(&rsrc->valid_buffer_range, box->x, box->x + box->width)) {
 492                 /* No flush for writes to uninitialized */
 493         } else if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 494                 if (usage & PIPE_TRANSFER_WRITE) {
 495                         /* STUB: flush reading */
 496                         //printf("debug: missed reading flush %d\n", resource->target);
 497                 } else if (usage & PIPE_TRANSFER_READ) {
 498                         /* STUB: flush writing */
 499                         //printf("debug: missed writing flush %d (%d-%d)\n", resource->target, box->x, box->x + box->width);
 500                 } else {
 501                         /* Why are you even mapping?! */
 502                 }
 503         }
 504
 505         if (bo->layout != PAN_LINEAR) {
 506                 /* Non-linear resources need to be indirectly mapped */
 507
 508                 if (usage & PIPE_TRANSFER_MAP_DIRECTLY)
 509                         return NULL;
 510
 511                 transfer->base.stride = box->width * bytes_per_pixel;
 512                 transfer->base.layer_stride = transfer->base.stride * box->height;
 513                 transfer->map = rzalloc_size(transfer, transfer->base.layer_stride * box->depth);
 514                 assert(box->depth == 1);
 515
 516                 if ((usage & PIPE_TRANSFER_READ) && bo->slices[level].initialized) {
 517                         if (bo->layout == PAN_AFBC) {
 518                                 DBG("Unimplemented: reads from AFBC");
 519                         } else if (bo->layout == PAN_TILED) {
 520                                 panfrost_load_tiled_image(
 521                                                 transfer->map,
 522                                                 bo->cpu + bo->slices[level].offset,
 523                                                 box,
 524                                                 transfer->base.stride,
 525                                                 bo->slices[level].stride,
 526                                                 util_format_get_blocksize(resource->format));
 527                         }
 528                 }
 529
 530                 return transfer->map;
 531         } else {
 532                 transfer->base.stride = bo->slices[level].stride;
 533                 transfer->base.layer_stride = bo->cubemap_stride;
 534
 535                 /* By mapping direct-write, we're implicitly already
 536                  * initialized (maybe), so be conservative */
 537
 538                 if ((usage & PIPE_TRANSFER_WRITE) && (usage & PIPE_TRANSFER_MAP_DIRECTLY))
 539                         bo->slices[level].initialized = true;
 540
 541                 return bo->cpu
 542                         + bo->slices[level].offset
 543                         + transfer->base.box.z * bo->cubemap_stride
 544                         + transfer->base.box.y * bo->slices[level].stride
 545                         + transfer->base.box.x * bytes_per_pixel;
 546         }
 547 }
 548
 549 static void
 550 panfrost_transfer_unmap(struct pipe_context *pctx,
 551                         struct pipe_transfer *transfer)
 552 {
 553         /* Gallium expects writeback here, so we tile */
 554
 555         struct panfrost_gtransfer *trans = pan_transfer(transfer);
 556         struct panfrost_resource *prsrc = (struct panfrost_resource *) transfer->resource;
 557
 558         if (trans->map) {
 559                 struct panfrost_bo *bo = prsrc->bo;
 560
 561                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 562                         unsigned level = transfer->level;
 563                         bo->slices[level].initialized = true;
 564
 565                         if (bo->layout == PAN_AFBC) {
 566                                 DBG("Unimplemented: writes to AFBC\n");
 567                         } else if (bo->layout == PAN_TILED) {
 568                                 assert(transfer->box.depth == 1);
 569
 570                                 panfrost_store_tiled_image(
 571                                                 bo->cpu + bo->slices[level].offset,
 572                                                 trans->map,
 573                                                 &transfer->box,
 574                                                 bo->slices[level].stride,
 575                                                 transfer->stride,
 576                                                 util_format_get_blocksize(prsrc->base.format));
 577                         }
 578                 }
 579         }
 580
 581
 582         util_range_add(&prsrc->valid_buffer_range,
 583                         transfer->box.x,
 584                         transfer->box.x + transfer->box.width);
 585
 586         /* Derefence the resource */
 587         pipe_resource_reference(&transfer->resource, NULL);
 588
 589         /* Transfer itself is RALLOCed at the moment */
 590         ralloc_free(transfer);
 591 }
 592
 593 static void
 594 panfrost_transfer_flush_region(struct pipe_context *pctx,
 595                 struct pipe_transfer *transfer,
 596                 const struct pipe_box *box)
 597 {
 598         struct panfrost_resource *rsc = pan_resource(transfer->resource);
 599
 600         if (transfer->resource->target == PIPE_BUFFER) {
 601                 util_range_add(&rsc->valid_buffer_range,
 602                                            transfer->box.x + box->x,
 603                                            transfer->box.x + box->x + box->width);
 604         }
 605 }
 606
 607 static struct pb_slab *
 608 panfrost_slab_alloc(void *priv, unsigned heap, unsigned entry_size, unsigned group_index)
 609 {
 610         struct panfrost_screen *screen = (struct panfrost_screen *) priv;
 611         struct panfrost_memory *mem = rzalloc(screen, struct panfrost_memory);
 612
 613         size_t slab_size = (1 << (MAX_SLAB_ENTRY_SIZE + 1));
 614
 615         mem->slab.num_entries = slab_size / entry_size;
 616         mem->slab.num_free = mem->slab.num_entries;
 617
 618         LIST_INITHEAD(&mem->slab.free);
 619         for (unsigned i = 0; i < mem->slab.num_entries; ++i) {
 620                 /* Create a slab entry */
 621                 struct panfrost_memory_entry *entry = rzalloc(mem, struct panfrost_memory_entry);
 622                 entry->offset = entry_size * i;
 623
 624                 entry->base.slab = &mem->slab;
 625                 entry->base.group_index = group_index;
 626
 627                 LIST_ADDTAIL(&entry->base.head, &mem->slab.free);
 628         }
 629
 630         /* Actually allocate the memory from kernel-space. Mapped, same_va, no
 631          * special flags */
 632
 633         panfrost_drm_allocate_slab(screen, mem, slab_size / 4096, true, 0, 0, 0);
 634
 635         return &mem->slab;
 636 }
 637
 638 static bool
 639 panfrost_slab_can_reclaim(void *priv, struct pb_slab_entry *entry)
 640 {
 641         struct panfrost_memory_entry *p_entry = (struct panfrost_memory_entry *) entry;
 642         return p_entry->freed;
 643 }
 644
 645 static void
 646 panfrost_slab_free(void *priv, struct pb_slab *slab)
 647 {
 648         struct panfrost_memory *mem = (struct panfrost_memory *) slab;
 649         struct panfrost_screen *screen = (struct panfrost_screen *) priv;
 650
 651         panfrost_drm_free_slab(screen, mem);
 652         ralloc_free(mem);
 653 }
 654
 655 static void
 656 panfrost_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 657 {
 658         //DBG("TODO %s\n", __func__);
 659 }
 660
 661 static enum pipe_format
 662 panfrost_resource_get_internal_format(struct pipe_resource *prsrc)
 663 {
 664         return prsrc->format;
 665 }
 666
 667 static boolean
 668 panfrost_generate_mipmap(
 669                 struct pipe_context *pctx,
 670                 struct pipe_resource *prsrc,
 671                 enum pipe_format format,
 672                 unsigned base_level,
 673                 unsigned last_level,
 674                 unsigned first_layer,
 675                 unsigned last_layer)
 676 {
 677         struct panfrost_context *ctx = pan_context(pctx);
 678         struct panfrost_resource *rsrc = pan_resource(prsrc);
 679
 680         /* Generating a mipmap invalidates the written levels, so make that
 681          * explicit so we don't try to wallpaper them back and end up with
 682          * u_blitter recursion */
 683
 684         assert(rsrc->bo);
 685         for (unsigned l = base_level + 1; l <= last_level; ++l)
 686                 rsrc->bo->slices[l].initialized = false;
 687
 688         /* Beyond that, we just delegate the hard stuff. We're careful to
 689          * include flushes on both ends to make sure the data is really valid.
 690          * We could be doing a lot better perf-wise, especially once we have
 691          * reorder-type optimizations in place. But for now prioritize
 692          * correctness. */
 693
 694         struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
 695         bool has_draws = job->last_job.gpu;
 696
 697         if (has_draws)
 698                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 699
 700         /* We've flushed the original buffer if needed, now trigger a blit */
 701
 702         bool blit_res = util_gen_mipmap(
 703                         pctx, prsrc, format,
 704                         base_level, last_level,
 705                         first_layer, last_layer,
 706                         PIPE_TEX_FILTER_LINEAR);
 707
 708         /* If the blit was successful, flush once more. If it wasn't, well, let
 709          * the state tracker deal with it. */
 710
 711         if (blit_res)
 712                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 713
 714         return blit_res;
 715 }
 716
 717 static void
 718 panfrost_resource_set_stencil(struct pipe_resource *prsrc,
 719                               struct pipe_resource *stencil)
 720 {
 721         pan_resource(prsrc)->separate_stencil = pan_resource(stencil);
 722 }
 723
 724 static struct pipe_resource *
 725 panfrost_resource_get_stencil(struct pipe_resource *prsrc)
 726 {
 727         return &pan_resource(prsrc)->separate_stencil->base;
 728 }
 729
 730 static const struct u_transfer_vtbl transfer_vtbl = {
 731         .resource_create          = panfrost_resource_create,
 732         .resource_destroy         = panfrost_resource_destroy,
 733         .transfer_map             = panfrost_transfer_map,
 734         .transfer_unmap           = panfrost_transfer_unmap,
 735         .transfer_flush_region    = panfrost_transfer_flush_region,
 736         .get_internal_format      = panfrost_resource_get_internal_format,
 737         .set_stencil              = panfrost_resource_set_stencil,
 738         .get_stencil              = panfrost_resource_get_stencil,
 739 };
 740
 741 void
 742 panfrost_resource_screen_init(struct panfrost_screen *pscreen)
 743 {
 744         //pscreen->base.resource_create_with_modifiers =
 745         //        panfrost_resource_create_with_modifiers;
 746         pscreen->base.resource_create = u_transfer_helper_resource_create;
 747         pscreen->base.resource_destroy = u_transfer_helper_resource_destroy;
 748         pscreen->base.resource_from_handle = panfrost_resource_from_handle;
 749         pscreen->base.resource_get_handle = panfrost_resource_get_handle;
 750         pscreen->base.transfer_helper = u_transfer_helper_create(&transfer_vtbl,
 751                                                             true, false,
 752                                                             true, true);
 753
 754         pb_slabs_init(&pscreen->slabs,
 755                         MIN_SLAB_ENTRY_SIZE,
 756                         MAX_SLAB_ENTRY_SIZE,
 757
 758                         3, /* Number of heaps */
 759
 760                         pscreen,
 761
 762                         panfrost_slab_can_reclaim,
 763                         panfrost_slab_alloc,
 764                         panfrost_slab_free);
 765 }
 766
 767 void
 768 panfrost_resource_screen_deinit(struct panfrost_screen *pscreen)
 769 {
 770         pb_slabs_deinit(&pscreen->slabs);
 771 }
 772
 773 void
 774 panfrost_resource_context_init(struct pipe_context *pctx)
 775 {
 776         pctx->transfer_map = u_transfer_helper_transfer_map;
 777         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 778         pctx->transfer_unmap = u_transfer_helper_transfer_unmap;
 779         pctx->buffer_subdata = u_default_buffer_subdata;
 780         pctx->create_surface = panfrost_create_surface;
 781         pctx->surface_destroy = panfrost_surface_destroy;
 782         pctx->resource_copy_region = util_resource_copy_region;
 783         pctx->blit = panfrost_blit;
 784         pctx->generate_mipmap = panfrost_generate_mipmap;
 785         pctx->flush_resource = panfrost_flush_resource;
 786         pctx->invalidate_resource = panfrost_invalidate_resource;
 787         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 788         pctx->buffer_subdata = u_default_buffer_subdata;
 789         pctx->texture_subdata = u_default_texture_subdata;
 790 }