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, Ltd.
   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->handle);
  74         rsc->slices[0].stride = whandle->stride;
  75         rsc->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 bool
  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->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                         int fd = panfrost_drm_export_bo(screen, rsrc->bo);
 125
 126                         if (fd < 0)
 127                                 return false;
 128
 129                         handle->handle = fd;
 130                         handle->stride = rsrc->slices[0].stride;
 131                         return true;
 132                 }
 133         }
 134
 135         return false;
 136 }
 137
 138 static void
 139 panfrost_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 140 {
 141         //DBG("TODO %s\n", __func__);
 142 }
 143
 144 static struct pipe_surface *
 145 panfrost_create_surface(struct pipe_context *pipe,
 146                         struct pipe_resource *pt,
 147                         const struct pipe_surface *surf_tmpl)
 148 {
 149         struct pipe_surface *ps = NULL;
 150
 151         ps = rzalloc(pipe, struct pipe_surface);
 152
 153         if (ps) {
 154                 pipe_reference_init(&ps->reference, 1);
 155                 pipe_resource_reference(&ps->texture, pt);
 156                 ps->context = pipe;
 157                 ps->format = surf_tmpl->format;
 158
 159                 if (pt->target != PIPE_BUFFER) {
 160                         assert(surf_tmpl->u.tex.level <= pt->last_level);
 161                         ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 162                         ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 163                         ps->u.tex.level = surf_tmpl->u.tex.level;
 164                         ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 165                         ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 166                 } else {
 167                         /* setting width as number of elements should get us correct renderbuffer width */
 168                         ps->width = surf_tmpl->u.buf.last_element - surf_tmpl->u.buf.first_element + 1;
 169                         ps->height = pt->height0;
 170                         ps->u.buf.first_element = surf_tmpl->u.buf.first_element;
 171                         ps->u.buf.last_element = surf_tmpl->u.buf.last_element;
 172                         assert(ps->u.buf.first_element <= ps->u.buf.last_element);
 173                         assert(ps->u.buf.last_element < ps->width);
 174                 }
 175         }
 176
 177         return ps;
 178 }
 179
 180 static void
 181 panfrost_surface_destroy(struct pipe_context *pipe,
 182                          struct pipe_surface *surf)
 183 {
 184         assert(surf->texture);
 185         pipe_resource_reference(&surf->texture, NULL);
 186         ralloc_free(surf);
 187 }
 188
 189 static struct pipe_resource *
 190 panfrost_create_scanout_res(struct pipe_screen *screen,
 191                             const struct pipe_resource *template)
 192 {
 193         struct panfrost_screen *pscreen = pan_screen(screen);
 194         struct pipe_resource scanout_templat = *template;
 195         struct renderonly_scanout *scanout;
 196         struct winsys_handle handle;
 197         struct pipe_resource *res;
 198
 199         scanout = renderonly_scanout_for_resource(&scanout_templat,
 200                         pscreen->ro, &handle);
 201         if (!scanout)
 202                 return NULL;
 203
 204         assert(handle.type == WINSYS_HANDLE_TYPE_FD);
 205         /* TODO: handle modifiers? */
 206         res = screen->resource_from_handle(screen, template, &handle,
 207                                            PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE);
 208         close(handle.handle);
 209         if (!res)
 210                 return NULL;
 211
 212         struct panfrost_resource *pres = pan_resource(res);
 213
 214         pres->scanout = scanout;
 215
 216         return res;
 217 }
 218
 219 /* Computes sizes for checksumming, which is 8 bytes per 16x16 tile */
 220
 221 #define CHECKSUM_TILE_WIDTH 16
 222 #define CHECKSUM_TILE_HEIGHT 16
 223 #define CHECKSUM_BYTES_PER_TILE 8
 224
 225 static unsigned
 226 panfrost_compute_checksum_sizes(
 227         struct panfrost_slice *slice,
 228         unsigned width,
 229         unsigned height)
 230 {
 231         unsigned aligned_width = ALIGN_POT(width, CHECKSUM_TILE_WIDTH);
 232         unsigned aligned_height = ALIGN_POT(height, CHECKSUM_TILE_HEIGHT);
 233
 234         unsigned tile_count_x = aligned_width / CHECKSUM_TILE_WIDTH;
 235         unsigned tile_count_y = aligned_height / CHECKSUM_TILE_HEIGHT;
 236
 237         slice->checksum_stride = tile_count_x * CHECKSUM_BYTES_PER_TILE;
 238
 239         return slice->checksum_stride * tile_count_y;
 240 }
 241
 242 /* Setup the mip tree given a particular layout, possibly with checksumming */
 243
 244 static void
 245 panfrost_setup_slices(struct panfrost_resource *pres, size_t *bo_size)
 246 {
 247         struct pipe_resource *res = &pres->base;
 248         unsigned width = res->width0;
 249         unsigned height = res->height0;
 250         unsigned depth = res->depth0;
 251         unsigned bytes_per_pixel = util_format_get_blocksize(res->format);
 252
 253         assert(depth > 0);
 254
 255         /* Tiled operates blockwise; linear is packed. Also, anything
 256          * we render to has to be tile-aligned. Maybe not strictly
 257          * necessary, but we're not *that* pressed for memory and it
 258          * makes code a lot simpler */
 259
 260         bool renderable = res->bind &
 261                           (PIPE_BIND_RENDER_TARGET | PIPE_BIND_DEPTH_STENCIL);
 262         bool afbc = pres->layout == PAN_AFBC;
 263         bool tiled = pres->layout == PAN_TILED;
 264         bool should_align = renderable || tiled;
 265
 266         /* We don't know how to specify a 2D stride for 3D textures */
 267
 268         bool can_align_stride =
 269                 res->target != PIPE_TEXTURE_3D;
 270
 271         should_align &= can_align_stride;
 272
 273         unsigned offset = 0;
 274         unsigned size_2d = 0;
 275
 276         for (unsigned l = 0; l <= res->last_level; ++l) {
 277                 struct panfrost_slice *slice = &pres->slices[l];
 278
 279                 unsigned effective_width = width;
 280                 unsigned effective_height = height;
 281                 unsigned effective_depth = depth;
 282
 283                 if (should_align) {
 284                         effective_width = ALIGN_POT(effective_width, 16);
 285                         effective_height = ALIGN_POT(effective_height, 16);
 286
 287                         /* We don't need to align depth */
 288                 }
 289
 290                 /* Align levels to cache-line as a performance improvement for
 291                  * linear/tiled and as a requirement for AFBC */
 292
 293                 offset = ALIGN_POT(offset, 64);
 294
 295                 slice->offset = offset;
 296
 297                 /* Compute the would-be stride */
 298                 unsigned stride = bytes_per_pixel * effective_width;
 299
 300                 /* ..but cache-line align it for performance */
 301                 if (can_align_stride && pres->layout == PAN_LINEAR)
 302                         stride = ALIGN_POT(stride, 64);
 303
 304                 slice->stride = stride;
 305
 306                 unsigned slice_one_size = slice->stride * effective_height;
 307                 unsigned slice_full_size = slice_one_size * effective_depth;
 308
 309                 /* Report 2D size for 3D texturing */
 310
 311                 if (l == 0)
 312                         size_2d = slice_one_size;
 313
 314                 /* Compute AFBC sizes if necessary */
 315                 if (afbc) {
 316                         slice->header_size =
 317                                 panfrost_afbc_header_size(width, height);
 318
 319                         offset += slice->header_size;
 320                 }
 321
 322                 offset += slice_full_size;
 323
 324                 /* Add a checksum region if necessary */
 325                 if (pres->checksummed) {
 326                         slice->checksum_offset = offset;
 327
 328                         unsigned size = panfrost_compute_checksum_sizes(
 329                                                 slice, width, height);
 330
 331                         offset += size;
 332                 }
 333
 334                 width = u_minify(width, 1);
 335                 height = u_minify(height, 1);
 336                 depth = u_minify(depth, 1);
 337         }
 338
 339         assert(res->array_size);
 340
 341         if (res->target != PIPE_TEXTURE_3D) {
 342                 /* Arrays and cubemaps have the entire miptree duplicated */
 343
 344                 pres->cubemap_stride = ALIGN_POT(offset, 64);
 345                 *bo_size = ALIGN_POT(pres->cubemap_stride * res->array_size, 4096);
 346         } else {
 347                 /* 3D strides across the 2D layers */
 348                 assert(res->array_size == 1);
 349
 350                 pres->cubemap_stride = size_2d;
 351                 *bo_size = ALIGN_POT(offset, 4096);
 352         }
 353 }
 354
 355 static void
 356 panfrost_resource_create_bo(struct panfrost_screen *screen, struct panfrost_resource *pres)
 357 {
 358         struct pipe_resource *res = &pres->base;
 359
 360         /* Based on the usage, figure out what storing will be used. There are
 361          * various tradeoffs:
 362          *
 363          * Linear: the basic format, bad for memory bandwidth, bad for cache
 364          * use. Zero-copy, though. Renderable.
 365          *
 366          * Tiled: Not compressed, but cache-optimized. Expensive to write into
 367          * (due to software tiling), but cheap to sample from. Ideal for most
 368          * textures.
 369          *
 370          * AFBC: Compressed and renderable (so always desirable for non-scanout
 371          * rendertargets). Cheap to sample from. The format is black box, so we
 372          * can't read/write from software.
 373          */
 374
 375         /* Tiling textures is almost always faster, unless we only use it once */
 376
 377         bool is_texture = (res->bind & PIPE_BIND_SAMPLER_VIEW);
 378         bool is_2d = res->depth0 == 1 && res->array_size == 1;
 379         bool is_streaming = (res->usage != PIPE_USAGE_STREAM);
 380
 381         /* TODO: Reenable tiling on SFBD systems when we support rendering to
 382          * tiled formats with SFBD */
 383         bool should_tile = is_streaming && is_texture && is_2d && !screen->require_sfbd;
 384
 385         /* Depth/stencil can't be tiled, only linear or AFBC */
 386         should_tile &= !(res->bind & PIPE_BIND_DEPTH_STENCIL);
 387
 388         /* FBOs we would like to checksum, if at all possible */
 389         bool can_checksum = !(res->bind & (PIPE_BIND_SCANOUT | PIPE_BIND_SHARED));
 390         bool should_checksum = res->bind & PIPE_BIND_RENDER_TARGET;
 391
 392         pres->checksummed = can_checksum && should_checksum;
 393
 394         /* Set the layout appropriately */
 395         pres->layout = should_tile ? PAN_TILED : PAN_LINEAR;
 396
 397         size_t bo_size;
 398
 399         panfrost_setup_slices(pres, &bo_size);
 400
 401         /* We create a BO immediately but don't bother mapping, since we don't
 402          * care to map e.g. FBOs which the CPU probably won't touch */
 403         pres->bo = panfrost_drm_create_bo(screen, bo_size, PAN_ALLOCATE_DELAY_MMAP);
 404 }
 405
 406 static struct pipe_resource *
 407 panfrost_resource_create(struct pipe_screen *screen,
 408                          const struct pipe_resource *template)
 409 {
 410         /* Make sure we're familiar */
 411         switch (template->target) {
 412         case PIPE_BUFFER:
 413         case PIPE_TEXTURE_1D:
 414         case PIPE_TEXTURE_2D:
 415         case PIPE_TEXTURE_3D:
 416         case PIPE_TEXTURE_CUBE:
 417         case PIPE_TEXTURE_RECT:
 418         case PIPE_TEXTURE_2D_ARRAY:
 419                 break;
 420         default:
 421                 DBG("Unknown texture target %d\n", template->target);
 422                 assert(0);
 423         }
 424
 425         if (template->bind &
 426             (PIPE_BIND_DISPLAY_TARGET | PIPE_BIND_SCANOUT | PIPE_BIND_SHARED))
 427                 return panfrost_create_scanout_res(screen, template);
 428
 429         struct panfrost_resource *so = rzalloc(screen, struct panfrost_resource);
 430         struct panfrost_screen *pscreen = (struct panfrost_screen *) screen;
 431
 432         so->base = *template;
 433         so->base.screen = screen;
 434
 435         pipe_reference_init(&so->base.reference, 1);
 436
 437         util_range_init(&so->valid_buffer_range);
 438
 439         panfrost_resource_create_bo(pscreen, so);
 440         return (struct pipe_resource *)so;
 441 }
 442
 443 void
 444 panfrost_bo_reference(struct panfrost_bo *bo)
 445 {
 446         pipe_reference(NULL, &bo->reference);
 447 }
 448
 449 void
 450 panfrost_bo_unreference(struct pipe_screen *screen, struct panfrost_bo *bo)
 451 {
 452         /* When the reference count goes to zero, we need to cleanup */
 453
 454         if (pipe_reference(&bo->reference, NULL))
 455                 panfrost_drm_release_bo(pan_screen(screen), bo, true);
 456 }
 457
 458 static void
 459 panfrost_resource_destroy(struct pipe_screen *screen,
 460                           struct pipe_resource *pt)
 461 {
 462         struct panfrost_screen *pscreen = pan_screen(screen);
 463         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
 464
 465         if (rsrc->scanout)
 466                 renderonly_scanout_destroy(rsrc->scanout, pscreen->ro);
 467
 468         if (rsrc->bo)
 469                 panfrost_bo_unreference(screen, rsrc->bo);
 470
 471         util_range_destroy(&rsrc->valid_buffer_range);
 472         ralloc_free(rsrc);
 473 }
 474
 475 static void *
 476 panfrost_transfer_map(struct pipe_context *pctx,
 477                       struct pipe_resource *resource,
 478                       unsigned level,
 479                       unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 480                       const struct pipe_box *box,
 481                       struct pipe_transfer **out_transfer)
 482 {
 483         int bytes_per_pixel = util_format_get_blocksize(resource->format);
 484         struct panfrost_resource *rsrc = pan_resource(resource);
 485         struct panfrost_bo *bo = rsrc->bo;
 486
 487         struct panfrost_gtransfer *transfer = rzalloc(pctx, struct panfrost_gtransfer);
 488         transfer->base.level = level;
 489         transfer->base.usage = usage;
 490         transfer->base.box = *box;
 491
 492         pipe_resource_reference(&transfer->base.resource, resource);
 493
 494         *out_transfer = &transfer->base;
 495
 496         /* If we haven't already mmaped, now's the time */
 497
 498         if (!bo->cpu) {
 499                 struct panfrost_screen *screen = pan_screen(pctx->screen);
 500                 panfrost_drm_mmap_bo(screen, bo);
 501         }
 502
 503         /* Check if we're bound for rendering and this is a read pixels. If so,
 504          * we need to flush */
 505
 506         struct panfrost_context *ctx = pan_context(pctx);
 507         struct pipe_framebuffer_state *fb = &ctx->pipe_framebuffer;
 508
 509         bool is_bound = false;
 510
 511         for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
 512                 /* If cbufs is NULL, we're definitely not bound here */
 513
 514                 if (fb->cbufs[c])
 515                         is_bound |= fb->cbufs[c]->texture == resource;
 516         }
 517
 518         if (is_bound && (usage & PIPE_TRANSFER_READ)) {
 519                 assert(level == 0);
 520                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 521         }
 522
 523         /* TODO: Respect usage flags */
 524
 525         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
 526                 /* TODO: reallocate */
 527                 //printf("debug: Missed reallocate\n");
 528         } else if ((usage & PIPE_TRANSFER_WRITE)
 529                    && resource->target == PIPE_BUFFER
 530                    && !util_ranges_intersect(&rsrc->valid_buffer_range, box->x, box->x + box->width)) {
 531                 /* No flush for writes to uninitialized */
 532         } else if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 533                 if (usage & PIPE_TRANSFER_WRITE) {
 534                         /* STUB: flush reading */
 535                         //printf("debug: missed reading flush %d\n", resource->target);
 536                 } else if (usage & PIPE_TRANSFER_READ) {
 537                         /* STUB: flush writing */
 538                         //printf("debug: missed writing flush %d (%d-%d)\n", resource->target, box->x, box->x + box->width);
 539                 } else {
 540                         /* Why are you even mapping?! */
 541                 }
 542         }
 543
 544         if (rsrc->layout != PAN_LINEAR) {
 545                 /* Non-linear resources need to be indirectly mapped */
 546
 547                 if (usage & PIPE_TRANSFER_MAP_DIRECTLY)
 548                         return NULL;
 549
 550                 transfer->base.stride = box->width * bytes_per_pixel;
 551                 transfer->base.layer_stride = transfer->base.stride * box->height;
 552                 transfer->map = rzalloc_size(transfer, transfer->base.layer_stride * box->depth);
 553                 assert(box->depth == 1);
 554
 555                 if ((usage & PIPE_TRANSFER_READ) && rsrc->slices[level].initialized) {
 556                         if (rsrc->layout == PAN_AFBC) {
 557                                 DBG("Unimplemented: reads from AFBC");
 558                         } else if (rsrc->layout == PAN_TILED) {
 559                                 panfrost_load_tiled_image(
 560                                         transfer->map,
 561                                         bo->cpu + rsrc->slices[level].offset,
 562                                         box,
 563                                         transfer->base.stride,
 564                                         rsrc->slices[level].stride,
 565                                         util_format_get_blocksize(resource->format));
 566                         }
 567                 }
 568
 569                 return transfer->map;
 570         } else {
 571                 transfer->base.stride = rsrc->slices[level].stride;
 572                 transfer->base.layer_stride = rsrc->cubemap_stride;
 573
 574                 /* By mapping direct-write, we're implicitly already
 575                  * initialized (maybe), so be conservative */
 576
 577                 if ((usage & PIPE_TRANSFER_WRITE) && (usage & PIPE_TRANSFER_MAP_DIRECTLY))
 578                         rsrc->slices[level].initialized = true;
 579
 580                 return bo->cpu
 581                        + rsrc->slices[level].offset
 582                        + transfer->base.box.z * rsrc->cubemap_stride
 583                        + transfer->base.box.y * rsrc->slices[level].stride
 584                        + transfer->base.box.x * bytes_per_pixel;
 585         }
 586 }
 587
 588 static void
 589 panfrost_transfer_unmap(struct pipe_context *pctx,
 590                         struct pipe_transfer *transfer)
 591 {
 592         /* Gallium expects writeback here, so we tile */
 593
 594         struct panfrost_gtransfer *trans = pan_transfer(transfer);
 595         struct panfrost_resource *prsrc = (struct panfrost_resource *) transfer->resource;
 596
 597         /* Mark whatever we wrote as written */
 598         if (transfer->usage & PIPE_TRANSFER_WRITE)
 599                 prsrc->slices[transfer->level].initialized = true;
 600
 601         if (trans->map) {
 602                 struct panfrost_bo *bo = prsrc->bo;
 603
 604                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 605                         if (prsrc->layout == PAN_AFBC) {
 606                                 DBG("Unimplemented: writes to AFBC\n");
 607                         } else if (prsrc->layout == PAN_TILED) {
 608                                 assert(transfer->box.depth == 1);
 609
 610                                 panfrost_store_tiled_image(
 611                                         bo->cpu + prsrc->slices[transfer->level].offset,
 612                                         trans->map,
 613                                         &transfer->box,
 614                                         prsrc->slices[transfer->level].stride,
 615                                         transfer->stride,
 616                                         util_format_get_blocksize(prsrc->base.format));
 617                         }
 618                 }
 619         }
 620
 621
 622         util_range_add(&prsrc->valid_buffer_range,
 623                        transfer->box.x,
 624                        transfer->box.x + transfer->box.width);
 625
 626         /* Derefence the resource */
 627         pipe_resource_reference(&transfer->resource, NULL);
 628
 629         /* Transfer itself is RALLOCed at the moment */
 630         ralloc_free(transfer);
 631 }
 632
 633 static void
 634 panfrost_transfer_flush_region(struct pipe_context *pctx,
 635                                struct pipe_transfer *transfer,
 636                                const struct pipe_box *box)
 637 {
 638         struct panfrost_resource *rsc = pan_resource(transfer->resource);
 639
 640         if (transfer->resource->target == PIPE_BUFFER) {
 641                 util_range_add(&rsc->valid_buffer_range,
 642                                transfer->box.x + box->x,
 643                                transfer->box.x + box->x + box->width);
 644         } else {
 645                 unsigned level = transfer->level;
 646                 rsc->slices[level].initialized = true;
 647         }
 648 }
 649
 650 static void
 651 panfrost_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 652 {
 653         //DBG("TODO %s\n", __func__);
 654 }
 655
 656 static enum pipe_format
 657 panfrost_resource_get_internal_format(struct pipe_resource *prsrc) {
 658         return prsrc->format;
 659 }
 660
 661 static bool
 662 panfrost_generate_mipmap(
 663         struct pipe_context *pctx,
 664         struct pipe_resource *prsrc,
 665         enum pipe_format format,
 666         unsigned base_level,
 667         unsigned last_level,
 668         unsigned first_layer,
 669         unsigned last_layer)
 670 {
 671         struct panfrost_context *ctx = pan_context(pctx);
 672         struct panfrost_resource *rsrc = pan_resource(prsrc);
 673
 674         /* Generating a mipmap invalidates the written levels, so make that
 675          * explicit so we don't try to wallpaper them back and end up with
 676          * u_blitter recursion */
 677
 678         assert(rsrc->bo);
 679         for (unsigned l = base_level + 1; l <= last_level; ++l)
 680                 rsrc->slices[l].initialized = false;
 681
 682         /* Beyond that, we just delegate the hard stuff. We're careful to
 683          * include flushes on both ends to make sure the data is really valid.
 684          * We could be doing a lot better perf-wise, especially once we have
 685          * reorder-type optimizations in place. But for now prioritize
 686          * correctness. */
 687
 688         struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
 689         bool has_draws = job->last_job.gpu;
 690
 691         if (has_draws)
 692                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 693
 694         /* We've flushed the original buffer if needed, now trigger a blit */
 695
 696         bool blit_res = util_gen_mipmap(
 697                                 pctx, prsrc, format,
 698                                 base_level, last_level,
 699                                 first_layer, last_layer,
 700                                 PIPE_TEX_FILTER_LINEAR);
 701
 702         /* If the blit was successful, flush once more. If it wasn't, well, let
 703          * the state tracker deal with it. */
 704
 705         if (blit_res)
 706                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 707
 708         return blit_res;
 709 }
 710
 711 /* Computes the address to a texture at a particular slice */
 712
 713 mali_ptr
 714 panfrost_get_texture_address(
 715         struct panfrost_resource *rsrc,
 716         unsigned level, unsigned face)
 717 {
 718         unsigned level_offset = rsrc->slices[level].offset;
 719         unsigned face_offset = face * rsrc->cubemap_stride;
 720
 721         return rsrc->bo->gpu + level_offset + face_offset;
 722 }
 723
 724 /* Given a resource that has already been allocated, hint that it should use a
 725  * given layout. These are suggestions, not commands; it is perfectly legal to
 726  * stub out this function, but there will be performance implications. */
 727
 728 void
 729 panfrost_resource_hint_layout(
 730                 struct panfrost_screen *screen,
 731                 struct panfrost_resource *rsrc,
 732                 enum panfrost_memory_layout layout,
 733                 signed weight)
 734 {
 735         /* Nothing to do, although a sophisticated implementation might store
 736          * the hint */
 737
 738         if (rsrc->layout == layout)
 739                 return;
 740
 741         /* We don't use the weight yet, but we should check that it's positive
 742          * (semantically meaning that we should choose the given `layout`) */
 743
 744         if (weight <= 0)
 745                 return;
 746
 747         /* Check if the preferred layout is legal for this buffer */
 748
 749         if (layout == PAN_AFBC) {
 750                 bool can_afbc = panfrost_format_supports_afbc(rsrc->base.format);
 751                 bool is_scanout = rsrc->base.bind &
 752                         (PIPE_BIND_DISPLAY_TARGET | PIPE_BIND_SCANOUT | PIPE_BIND_SHARED);
 753
 754                 if (!can_afbc || is_scanout)
 755                         return;
 756         }
 757
 758         /* Simple heuristic so far: if the resource is uninitialized, switch to
 759          * the hinted layout. If it is initialized, keep the original layout.
 760          * This misses some cases where it would be beneficial to switch and
 761          * blit. */
 762
 763         bool is_initialized = false;
 764
 765         for (unsigned i = 0; i < MAX_MIP_LEVELS; ++i)
 766                 is_initialized |= rsrc->slices[i].initialized;
 767
 768         if (is_initialized)
 769                 return;
 770
 771         /* We're uninitialized, so do a layout switch. Reinitialize slices. */
 772
 773         size_t new_size;
 774         rsrc->layout = layout;
 775         panfrost_setup_slices(rsrc, &new_size);
 776
 777         /* If we grew in size, reallocate the BO */
 778         if (new_size > rsrc->bo->size) {
 779                 panfrost_drm_release_bo(screen, rsrc->bo, true);
 780                 rsrc->bo = panfrost_drm_create_bo(screen, new_size, PAN_ALLOCATE_DELAY_MMAP);
 781         }
 782 }
 783
 784 static void
 785 panfrost_resource_set_stencil(struct pipe_resource *prsrc,
 786                               struct pipe_resource *stencil)
 787 {
 788         pan_resource(prsrc)->separate_stencil = pan_resource(stencil);
 789 }
 790
 791 static struct pipe_resource *
 792 panfrost_resource_get_stencil(struct pipe_resource *prsrc)
 793 {
 794         return &pan_resource(prsrc)->separate_stencil->base;
 795 }
 796
 797 static const struct u_transfer_vtbl transfer_vtbl = {
 798         .resource_create          = panfrost_resource_create,
 799         .resource_destroy         = panfrost_resource_destroy,
 800         .transfer_map             = panfrost_transfer_map,
 801         .transfer_unmap           = panfrost_transfer_unmap,
 802         .transfer_flush_region    = panfrost_transfer_flush_region,
 803         .get_internal_format      = panfrost_resource_get_internal_format,
 804         .set_stencil              = panfrost_resource_set_stencil,
 805         .get_stencil              = panfrost_resource_get_stencil,
 806 };
 807
 808 void
 809 panfrost_resource_screen_init(struct panfrost_screen *pscreen)
 810 {
 811         //pscreen->base.resource_create_with_modifiers =
 812         //        panfrost_resource_create_with_modifiers;
 813         pscreen->base.resource_create = u_transfer_helper_resource_create;
 814         pscreen->base.resource_destroy = u_transfer_helper_resource_destroy;
 815         pscreen->base.resource_from_handle = panfrost_resource_from_handle;
 816         pscreen->base.resource_get_handle = panfrost_resource_get_handle;
 817         pscreen->base.transfer_helper = u_transfer_helper_create(&transfer_vtbl,
 818                                         true, false,
 819                                         true, true);
 820 }
 821
 822 void
 823 panfrost_resource_context_init(struct pipe_context *pctx)
 824 {
 825         pctx->transfer_map = u_transfer_helper_transfer_map;
 826         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 827         pctx->transfer_unmap = u_transfer_helper_transfer_unmap;
 828         pctx->buffer_subdata = u_default_buffer_subdata;
 829         pctx->create_surface = panfrost_create_surface;
 830         pctx->surface_destroy = panfrost_surface_destroy;
 831         pctx->resource_copy_region = util_resource_copy_region;
 832         pctx->blit = panfrost_blit;
 833         pctx->generate_mipmap = panfrost_generate_mipmap;
 834         pctx->flush_resource = panfrost_flush_resource;
 835         pctx->invalidate_resource = panfrost_invalidate_resource;
 836         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 837         pctx->buffer_subdata = u_default_buffer_subdata;
 838         pctx->texture_subdata = u_default_texture_subdata;
 839 }