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_bo.h"
  45 #include "pan_context.h"
  46 #include "pan_screen.h"
  47 #include "pan_resource.h"
  48 #include "pan_util.h"
  49 #include "pan_tiling.h"
  50
  51 static void
  52 panfrost_resource_reset_damage(struct panfrost_resource *pres)
  53 {
  54         /* We set the damage extent to the full resource size but keep the
  55          * damage box empty so that the FB content is reloaded by default.
  56          */
  57         memset(&pres->damage, 0, sizeof(pres->damage));
  58         pres->damage.extent.maxx = pres->base.width0;
  59         pres->damage.extent.maxy = pres->base.height0;
  60 }
  61
  62 static struct pipe_resource *
  63 panfrost_resource_from_handle(struct pipe_screen *pscreen,
  64                               const struct pipe_resource *templat,
  65                               struct winsys_handle *whandle,
  66                               unsigned usage)
  67 {
  68         struct panfrost_screen *screen = pan_screen(pscreen);
  69         struct panfrost_resource *rsc;
  70         struct pipe_resource *prsc;
  71
  72         assert(whandle->type == WINSYS_HANDLE_TYPE_FD);
  73
  74         rsc = rzalloc(pscreen, struct panfrost_resource);
  75         if (!rsc)
  76                 return NULL;
  77
  78         prsc = &rsc->base;
  79
  80         *prsc = *templat;
  81
  82         pipe_reference_init(&prsc->reference, 1);
  83         prsc->screen = pscreen;
  84
  85         rsc->bo = panfrost_bo_import(screen, whandle->handle);
  86         rsc->slices[0].stride = whandle->stride;
  87         rsc->slices[0].initialized = true;
  88         panfrost_resource_reset_damage(rsc);
  89
  90         if (screen->ro) {
  91                 rsc->scanout =
  92                         renderonly_create_gpu_import_for_resource(prsc, screen->ro, NULL);
  93                 /* failure is expected in some cases.. */
  94         }
  95
  96         return prsc;
  97 }
  98
  99 static bool
 100 panfrost_resource_get_handle(struct pipe_screen *pscreen,
 101                              struct pipe_context *ctx,
 102                              struct pipe_resource *pt,
 103                              struct winsys_handle *handle,
 104                              unsigned usage)
 105 {
 106         struct panfrost_screen *screen = pan_screen(pscreen);
 107         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
 108         struct renderonly_scanout *scanout = rsrc->scanout;
 109
 110         handle->modifier = DRM_FORMAT_MOD_INVALID;
 111
 112         if (handle->type == WINSYS_HANDLE_TYPE_SHARED) {
 113                 return false;
 114         } else if (handle->type == WINSYS_HANDLE_TYPE_KMS) {
 115                 if (renderonly_get_handle(scanout, handle))
 116                         return true;
 117
 118                 handle->handle = rsrc->bo->gem_handle;
 119                 handle->stride = rsrc->slices[0].stride;
 120                 return TRUE;
 121         } else if (handle->type == WINSYS_HANDLE_TYPE_FD) {
 122                 if (scanout) {
 123                         struct drm_prime_handle args = {
 124                                 .handle = scanout->handle,
 125                                 .flags = DRM_CLOEXEC,
 126                         };
 127
 128                         int ret = drmIoctl(screen->ro->kms_fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 129                         if (ret == -1)
 130                                 return false;
 131
 132                         handle->stride = scanout->stride;
 133                         handle->handle = args.fd;
 134
 135                         return true;
 136                 } else {
 137                         int fd = panfrost_bo_export(rsrc->bo);
 138
 139                         if (fd < 0)
 140                                 return false;
 141
 142                         handle->handle = fd;
 143                         handle->stride = rsrc->slices[0].stride;
 144                         return true;
 145                 }
 146         }
 147
 148         return false;
 149 }
 150
 151 static void
 152 panfrost_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 153 {
 154         //DBG("TODO %s\n", __func__);
 155 }
 156
 157 static struct pipe_surface *
 158 panfrost_create_surface(struct pipe_context *pipe,
 159                         struct pipe_resource *pt,
 160                         const struct pipe_surface *surf_tmpl)
 161 {
 162         struct pipe_surface *ps = NULL;
 163
 164         ps = rzalloc(pipe, struct pipe_surface);
 165
 166         if (ps) {
 167                 pipe_reference_init(&ps->reference, 1);
 168                 pipe_resource_reference(&ps->texture, pt);
 169                 ps->context = pipe;
 170                 ps->format = surf_tmpl->format;
 171
 172                 if (pt->target != PIPE_BUFFER) {
 173                         assert(surf_tmpl->u.tex.level <= pt->last_level);
 174                         ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 175                         ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 176                         ps->u.tex.level = surf_tmpl->u.tex.level;
 177                         ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 178                         ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 179                 } else {
 180                         /* setting width as number of elements should get us correct renderbuffer width */
 181                         ps->width = surf_tmpl->u.buf.last_element - surf_tmpl->u.buf.first_element + 1;
 182                         ps->height = pt->height0;
 183                         ps->u.buf.first_element = surf_tmpl->u.buf.first_element;
 184                         ps->u.buf.last_element = surf_tmpl->u.buf.last_element;
 185                         assert(ps->u.buf.first_element <= ps->u.buf.last_element);
 186                         assert(ps->u.buf.last_element < ps->width);
 187                 }
 188         }
 189
 190         return ps;
 191 }
 192
 193 static void
 194 panfrost_surface_destroy(struct pipe_context *pipe,
 195                          struct pipe_surface *surf)
 196 {
 197         assert(surf->texture);
 198         pipe_resource_reference(&surf->texture, NULL);
 199         ralloc_free(surf);
 200 }
 201
 202 static struct pipe_resource *
 203 panfrost_create_scanout_res(struct pipe_screen *screen,
 204                             const struct pipe_resource *template)
 205 {
 206         struct panfrost_screen *pscreen = pan_screen(screen);
 207         struct pipe_resource scanout_templat = *template;
 208         struct renderonly_scanout *scanout;
 209         struct winsys_handle handle;
 210         struct pipe_resource *res;
 211
 212         scanout = renderonly_scanout_for_resource(&scanout_templat,
 213                         pscreen->ro, &handle);
 214         if (!scanout)
 215                 return NULL;
 216
 217         assert(handle.type == WINSYS_HANDLE_TYPE_FD);
 218         /* TODO: handle modifiers? */
 219         res = screen->resource_from_handle(screen, template, &handle,
 220                                            PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE);
 221         close(handle.handle);
 222         if (!res)
 223                 return NULL;
 224
 225         struct panfrost_resource *pres = pan_resource(res);
 226
 227         pres->scanout = scanout;
 228
 229         return res;
 230 }
 231
 232 /* Computes sizes for checksumming, which is 8 bytes per 16x16 tile */
 233
 234 #define CHECKSUM_TILE_WIDTH 16
 235 #define CHECKSUM_TILE_HEIGHT 16
 236 #define CHECKSUM_BYTES_PER_TILE 8
 237
 238 static unsigned
 239 panfrost_compute_checksum_sizes(
 240         struct panfrost_slice *slice,
 241         unsigned width,
 242         unsigned height)
 243 {
 244         unsigned aligned_width = ALIGN_POT(width, CHECKSUM_TILE_WIDTH);
 245         unsigned aligned_height = ALIGN_POT(height, CHECKSUM_TILE_HEIGHT);
 246
 247         unsigned tile_count_x = aligned_width / CHECKSUM_TILE_WIDTH;
 248         unsigned tile_count_y = aligned_height / CHECKSUM_TILE_HEIGHT;
 249
 250         slice->checksum_stride = tile_count_x * CHECKSUM_BYTES_PER_TILE;
 251
 252         return slice->checksum_stride * tile_count_y;
 253 }
 254
 255 /* Setup the mip tree given a particular layout, possibly with checksumming */
 256
 257 static void
 258 panfrost_setup_slices(struct panfrost_resource *pres, size_t *bo_size)
 259 {
 260         struct pipe_resource *res = &pres->base;
 261         unsigned width = res->width0;
 262         unsigned height = res->height0;
 263         unsigned depth = res->depth0;
 264         unsigned bytes_per_pixel = util_format_get_blocksize(res->format);
 265
 266         assert(depth > 0);
 267
 268         /* Tiled operates blockwise; linear is packed. Also, anything
 269          * we render to has to be tile-aligned. Maybe not strictly
 270          * necessary, but we're not *that* pressed for memory and it
 271          * makes code a lot simpler */
 272
 273         bool renderable = res->bind &
 274                           (PIPE_BIND_RENDER_TARGET | PIPE_BIND_DEPTH_STENCIL);
 275         bool afbc = pres->layout == PAN_AFBC;
 276         bool tiled = pres->layout == PAN_TILED;
 277         bool should_align = renderable || tiled;
 278
 279         /* We don't know how to specify a 2D stride for 3D textures */
 280
 281         bool can_align_stride =
 282                 res->target != PIPE_TEXTURE_3D;
 283
 284         should_align &= can_align_stride;
 285
 286         unsigned offset = 0;
 287         unsigned size_2d = 0;
 288
 289         for (unsigned l = 0; l <= res->last_level; ++l) {
 290                 struct panfrost_slice *slice = &pres->slices[l];
 291
 292                 unsigned effective_width = width;
 293                 unsigned effective_height = height;
 294                 unsigned effective_depth = depth;
 295
 296                 if (should_align) {
 297                         effective_width = ALIGN_POT(effective_width, 16);
 298                         effective_height = ALIGN_POT(effective_height, 16);
 299
 300                         /* We don't need to align depth */
 301                 }
 302
 303                 /* Align levels to cache-line as a performance improvement for
 304                  * linear/tiled and as a requirement for AFBC */
 305
 306                 offset = ALIGN_POT(offset, 64);
 307
 308                 slice->offset = offset;
 309
 310                 /* Compute the would-be stride */
 311                 unsigned stride = bytes_per_pixel * effective_width;
 312
 313                 /* ..but cache-line align it for performance */
 314                 if (can_align_stride && pres->layout == PAN_LINEAR)
 315                         stride = ALIGN_POT(stride, 64);
 316
 317                 slice->stride = stride;
 318
 319                 unsigned slice_one_size = slice->stride * effective_height;
 320                 unsigned slice_full_size = slice_one_size * effective_depth;
 321
 322                 /* Report 2D size for 3D texturing */
 323
 324                 if (l == 0)
 325                         size_2d = slice_one_size;
 326
 327                 /* Compute AFBC sizes if necessary */
 328                 if (afbc) {
 329                         slice->header_size =
 330                                 panfrost_afbc_header_size(width, height);
 331
 332                         offset += slice->header_size;
 333                 }
 334
 335                 offset += slice_full_size;
 336
 337                 /* Add a checksum region if necessary */
 338                 if (pres->checksummed) {
 339                         slice->checksum_offset = offset;
 340
 341                         unsigned size = panfrost_compute_checksum_sizes(
 342                                                 slice, width, height);
 343
 344                         offset += size;
 345                 }
 346
 347                 width = u_minify(width, 1);
 348                 height = u_minify(height, 1);
 349                 depth = u_minify(depth, 1);
 350         }
 351
 352         assert(res->array_size);
 353
 354         if (res->target != PIPE_TEXTURE_3D) {
 355                 /* Arrays and cubemaps have the entire miptree duplicated */
 356
 357                 pres->cubemap_stride = ALIGN_POT(offset, 64);
 358                 *bo_size = ALIGN_POT(pres->cubemap_stride * res->array_size, 4096);
 359         } else {
 360                 /* 3D strides across the 2D layers */
 361                 assert(res->array_size == 1);
 362
 363                 pres->cubemap_stride = size_2d;
 364                 *bo_size = ALIGN_POT(offset, 4096);
 365         }
 366 }
 367
 368 static void
 369 panfrost_resource_create_bo(struct panfrost_screen *screen, struct panfrost_resource *pres)
 370 {
 371         struct pipe_resource *res = &pres->base;
 372
 373         /* Based on the usage, figure out what storing will be used. There are
 374          * various tradeoffs:
 375          *
 376          * Linear: the basic format, bad for memory bandwidth, bad for cache
 377          * use. Zero-copy, though. Renderable.
 378          *
 379          * Tiled: Not compressed, but cache-optimized. Expensive to write into
 380          * (due to software tiling), but cheap to sample from. Ideal for most
 381          * textures.
 382          *
 383          * AFBC: Compressed and renderable (so always desirable for non-scanout
 384          * rendertargets). Cheap to sample from. The format is black box, so we
 385          * can't read/write from software.
 386          */
 387
 388         /* Tiling textures is almost always faster, unless we only use it once */
 389
 390         bool is_texture = (res->bind & PIPE_BIND_SAMPLER_VIEW);
 391         bool is_2d = res->depth0 == 1 && res->array_size == 1;
 392         bool is_streaming = (res->usage != PIPE_USAGE_STREAM);
 393
 394         /* TODO: Reenable tiling on SFBD systems when we support rendering to
 395          * tiled formats with SFBD */
 396         bool should_tile = is_streaming && is_texture && is_2d && !screen->require_sfbd;
 397
 398         /* Depth/stencil can't be tiled, only linear or AFBC */
 399         should_tile &= !(res->bind & PIPE_BIND_DEPTH_STENCIL);
 400
 401         /* FBOs we would like to checksum, if at all possible */
 402         bool can_checksum = !(res->bind & (PIPE_BIND_SCANOUT | PIPE_BIND_SHARED));
 403         bool should_checksum = res->bind & PIPE_BIND_RENDER_TARGET;
 404
 405         pres->checksummed = can_checksum && should_checksum;
 406
 407         /* Set the layout appropriately */
 408         pres->layout = should_tile ? PAN_TILED : PAN_LINEAR;
 409
 410         size_t bo_size;
 411
 412         panfrost_setup_slices(pres, &bo_size);
 413
 414         /* We create a BO immediately but don't bother mapping, since we don't
 415          * care to map e.g. FBOs which the CPU probably won't touch */
 416         pres->bo = panfrost_bo_create(screen, bo_size, PAN_BO_DELAY_MMAP);
 417 }
 418
 419 void
 420 panfrost_resource_set_damage_region(struct pipe_screen *screen,
 421                                     struct pipe_resource *res,
 422                                     unsigned int nrects,
 423                                     const struct pipe_box *rects)
 424 {
 425         struct panfrost_resource *pres = pan_resource(res);
 426         struct pipe_box *damage_rect = &pres->damage.biggest_rect;
 427         struct pipe_scissor_state *damage_extent = &pres->damage.extent;
 428         unsigned int i;
 429
 430         if (!nrects) {
 431                 panfrost_resource_reset_damage(pres);
 432                 return;
 433         }
 434
 435         /* We keep track of 2 different things here:
 436          * 1 the damage extent: the quad including all damage regions. Will be
 437          *   used restrict the rendering area
 438          * 2 the biggest damage rectangle: when there are more than one damage
 439          *   rect we keep the biggest one and will generate 4 wallpaper quads
 440          *   out of it (see panfrost_draw_wallpaper() for more details). We
 441          *   might want to do something smarter at some point.
 442          *
 443          *                _________________________________
 444          *                |                               |
 445          *                |    _________________________  |
 446          *                |   | rect1|         _________| |
 447          *                |   |______|_____   | rect 3: | |
 448          *                |   |    | rect2 |  | biggest | |
 449          *                |   |    |_______|  |  rect   | |
 450          *                |   |_______________|_________| |
 451          *                |        damage extent          |
 452          *                |_______________________________|
 453          *                            resource
 454          */
 455         memset(&pres->damage, 0, sizeof(pres->damage));
 456         damage_extent->minx = 0xffff;
 457         damage_extent->miny = 0xffff;
 458         for (i = 0; i < nrects; i++) {
 459                 int x = rects[i].x, w = rects[i].width, h = rects[i].height;
 460                 int y = res->height0 - (rects[i].y + h);
 461
 462                 /* Clamp x,y,w,h to prevent negative values. */
 463                 if (x < 0) {
 464                         h += x;
 465                         x = 0;
 466                 }
 467                 if (y < 0) {
 468                         w += y;
 469                         y = 0;
 470                 }
 471                 w = MAX2(w, 0);
 472                 h = MAX2(h, 0);
 473
 474                 if (damage_rect->width * damage_rect->height < w * h)
 475                        u_box_2d(x, y, w, h, damage_rect);
 476
 477                 damage_extent->minx = MIN2(damage_extent->minx, x);
 478                 damage_extent->miny = MIN2(damage_extent->miny, y);
 479                 damage_extent->maxx = MAX2(damage_extent->maxx,
 480                                            MIN2(x + w, res->width0));
 481                 damage_extent->maxy = MAX2(damage_extent->maxy,
 482                                            MIN2(y + h, res->height0));
 483         }
 484 }
 485
 486 static struct pipe_resource *
 487 panfrost_resource_create(struct pipe_screen *screen,
 488                          const struct pipe_resource *template)
 489 {
 490         /* Make sure we're familiar */
 491         switch (template->target) {
 492         case PIPE_BUFFER:
 493         case PIPE_TEXTURE_1D:
 494         case PIPE_TEXTURE_2D:
 495         case PIPE_TEXTURE_3D:
 496         case PIPE_TEXTURE_CUBE:
 497         case PIPE_TEXTURE_RECT:
 498         case PIPE_TEXTURE_2D_ARRAY:
 499                 break;
 500         default:
 501                 DBG("Unknown texture target %d\n", template->target);
 502                 assert(0);
 503         }
 504
 505         if (template->bind &
 506             (PIPE_BIND_DISPLAY_TARGET | PIPE_BIND_SCANOUT | PIPE_BIND_SHARED))
 507                 return panfrost_create_scanout_res(screen, template);
 508
 509         struct panfrost_resource *so = rzalloc(screen, struct panfrost_resource);
 510         struct panfrost_screen *pscreen = (struct panfrost_screen *) screen;
 511
 512         so->base = *template;
 513         so->base.screen = screen;
 514
 515         pipe_reference_init(&so->base.reference, 1);
 516
 517         util_range_init(&so->valid_buffer_range);
 518
 519         panfrost_resource_create_bo(pscreen, so);
 520         panfrost_resource_reset_damage(so);
 521
 522         return (struct pipe_resource *)so;
 523 }
 524
 525 static void
 526 panfrost_resource_destroy(struct pipe_screen *screen,
 527                           struct pipe_resource *pt)
 528 {
 529         struct panfrost_screen *pscreen = pan_screen(screen);
 530         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
 531
 532         if (rsrc->scanout)
 533                 renderonly_scanout_destroy(rsrc->scanout, pscreen->ro);
 534
 535         if (rsrc->bo)
 536                 panfrost_bo_unreference(rsrc->bo);
 537
 538         util_range_destroy(&rsrc->valid_buffer_range);
 539         ralloc_free(rsrc);
 540 }
 541
 542 static void *
 543 panfrost_transfer_map(struct pipe_context *pctx,
 544                       struct pipe_resource *resource,
 545                       unsigned level,
 546                       unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 547                       const struct pipe_box *box,
 548                       struct pipe_transfer **out_transfer)
 549 {
 550         int bytes_per_pixel = util_format_get_blocksize(resource->format);
 551         struct panfrost_resource *rsrc = pan_resource(resource);
 552         struct panfrost_bo *bo = rsrc->bo;
 553
 554         struct panfrost_gtransfer *transfer = rzalloc(pctx, struct panfrost_gtransfer);
 555         transfer->base.level = level;
 556         transfer->base.usage = usage;
 557         transfer->base.box = *box;
 558
 559         pipe_resource_reference(&transfer->base.resource, resource);
 560
 561         *out_transfer = &transfer->base;
 562
 563         /* If we haven't already mmaped, now's the time */
 564         panfrost_bo_mmap(bo);
 565
 566         /* Check if we're bound for rendering and this is a read pixels. If so,
 567          * we need to flush */
 568
 569         struct panfrost_context *ctx = pan_context(pctx);
 570         struct pipe_framebuffer_state *fb = &ctx->pipe_framebuffer;
 571
 572         bool is_bound = false;
 573
 574         for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
 575                 /* If cbufs is NULL, we're definitely not bound here */
 576
 577                 if (fb->cbufs[c])
 578                         is_bound |= fb->cbufs[c]->texture == resource;
 579         }
 580
 581         if (is_bound && (usage & PIPE_TRANSFER_READ)) {
 582                 assert(level == 0);
 583                 panfrost_flush_all_batches(ctx, true);
 584         }
 585
 586         /* TODO: Respect usage flags */
 587
 588         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
 589                 /* TODO: reallocate */
 590                 //printf("debug: Missed reallocate\n");
 591         } else if ((usage & PIPE_TRANSFER_WRITE)
 592                    && resource->target == PIPE_BUFFER
 593                    && !util_ranges_intersect(&rsrc->valid_buffer_range, box->x, box->x + box->width)) {
 594                 /* No flush for writes to uninitialized */
 595         } else if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 596                 if (usage & PIPE_TRANSFER_WRITE) {
 597                         /* STUB: flush reading */
 598                         //printf("debug: missed reading flush %d\n", resource->target);
 599                 } else if (usage & PIPE_TRANSFER_READ) {
 600                         /* STUB: flush writing */
 601                         //printf("debug: missed writing flush %d (%d-%d)\n", resource->target, box->x, box->x + box->width);
 602                 } else {
 603                         /* Why are you even mapping?! */
 604                 }
 605         }
 606
 607         if (rsrc->layout != PAN_LINEAR) {
 608                 /* Non-linear resources need to be indirectly mapped */
 609
 610                 if (usage & PIPE_TRANSFER_MAP_DIRECTLY)
 611                         return NULL;
 612
 613                 transfer->base.stride = box->width * bytes_per_pixel;
 614                 transfer->base.layer_stride = transfer->base.stride * box->height;
 615                 transfer->map = rzalloc_size(transfer, transfer->base.layer_stride * box->depth);
 616                 assert(box->depth == 1);
 617
 618                 if ((usage & PIPE_TRANSFER_READ) && rsrc->slices[level].initialized) {
 619                         if (rsrc->layout == PAN_AFBC) {
 620                                 DBG("Unimplemented: reads from AFBC");
 621                         } else if (rsrc->layout == PAN_TILED) {
 622                                 panfrost_load_tiled_image(
 623                                         transfer->map,
 624                                         bo->cpu + rsrc->slices[level].offset,
 625                                         box,
 626                                         transfer->base.stride,
 627                                         rsrc->slices[level].stride,
 628                                         util_format_get_blocksize(resource->format));
 629                         }
 630                 }
 631
 632                 return transfer->map;
 633         } else {
 634                 transfer->base.stride = rsrc->slices[level].stride;
 635                 transfer->base.layer_stride = rsrc->cubemap_stride;
 636
 637                 /* By mapping direct-write, we're implicitly already
 638                  * initialized (maybe), so be conservative */
 639
 640                 if ((usage & PIPE_TRANSFER_WRITE) && (usage & PIPE_TRANSFER_MAP_DIRECTLY))
 641                         rsrc->slices[level].initialized = true;
 642
 643                 return bo->cpu
 644                        + rsrc->slices[level].offset
 645                        + transfer->base.box.z * rsrc->cubemap_stride
 646                        + transfer->base.box.y * rsrc->slices[level].stride
 647                        + transfer->base.box.x * bytes_per_pixel;
 648         }
 649 }
 650
 651 static void
 652 panfrost_transfer_unmap(struct pipe_context *pctx,
 653                         struct pipe_transfer *transfer)
 654 {
 655         /* Gallium expects writeback here, so we tile */
 656
 657         struct panfrost_gtransfer *trans = pan_transfer(transfer);
 658         struct panfrost_resource *prsrc = (struct panfrost_resource *) transfer->resource;
 659
 660         /* Mark whatever we wrote as written */
 661         if (transfer->usage & PIPE_TRANSFER_WRITE)
 662                 prsrc->slices[transfer->level].initialized = true;
 663
 664         if (trans->map) {
 665                 struct panfrost_bo *bo = prsrc->bo;
 666
 667                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 668                         if (prsrc->layout == PAN_AFBC) {
 669                                 DBG("Unimplemented: writes to AFBC\n");
 670                         } else if (prsrc->layout == PAN_TILED) {
 671                                 assert(transfer->box.depth == 1);
 672
 673                                 panfrost_store_tiled_image(
 674                                         bo->cpu + prsrc->slices[transfer->level].offset,
 675                                         trans->map,
 676                                         &transfer->box,
 677                                         prsrc->slices[transfer->level].stride,
 678                                         transfer->stride,
 679                                         util_format_get_blocksize(prsrc->base.format));
 680                         }
 681                 }
 682         }
 683
 684
 685         util_range_add(&prsrc->valid_buffer_range,
 686                        transfer->box.x,
 687                        transfer->box.x + transfer->box.width);
 688
 689         /* Derefence the resource */
 690         pipe_resource_reference(&transfer->resource, NULL);
 691
 692         /* Transfer itself is RALLOCed at the moment */
 693         ralloc_free(transfer);
 694 }
 695
 696 static void
 697 panfrost_transfer_flush_region(struct pipe_context *pctx,
 698                                struct pipe_transfer *transfer,
 699                                const struct pipe_box *box)
 700 {
 701         struct panfrost_resource *rsc = pan_resource(transfer->resource);
 702
 703         if (transfer->resource->target == PIPE_BUFFER) {
 704                 util_range_add(&rsc->valid_buffer_range,
 705                                transfer->box.x + box->x,
 706                                transfer->box.x + box->x + box->width);
 707         } else {
 708                 unsigned level = transfer->level;
 709                 rsc->slices[level].initialized = true;
 710         }
 711 }
 712
 713 static void
 714 panfrost_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 715 {
 716         //DBG("TODO %s\n", __func__);
 717 }
 718
 719 static enum pipe_format
 720 panfrost_resource_get_internal_format(struct pipe_resource *prsrc) {
 721         return prsrc->format;
 722 }
 723
 724 static bool
 725 panfrost_generate_mipmap(
 726         struct pipe_context *pctx,
 727         struct pipe_resource *prsrc,
 728         enum pipe_format format,
 729         unsigned base_level,
 730         unsigned last_level,
 731         unsigned first_layer,
 732         unsigned last_layer)
 733 {
 734         struct panfrost_context *ctx = pan_context(pctx);
 735         struct panfrost_resource *rsrc = pan_resource(prsrc);
 736
 737         /* Generating a mipmap invalidates the written levels, so make that
 738          * explicit so we don't try to wallpaper them back and end up with
 739          * u_blitter recursion */
 740
 741         assert(rsrc->bo);
 742         for (unsigned l = base_level + 1; l <= last_level; ++l)
 743                 rsrc->slices[l].initialized = false;
 744
 745         /* Beyond that, we just delegate the hard stuff. We're careful to
 746          * include flushes on both ends to make sure the data is really valid.
 747          * We could be doing a lot better perf-wise, especially once we have
 748          * reorder-type optimizations in place. But for now prioritize
 749          * correctness. */
 750
 751         struct panfrost_batch *batch = panfrost_get_batch_for_fbo(ctx);
 752         bool has_draws = batch->last_job.gpu;
 753
 754         if (has_draws)
 755                 panfrost_flush_all_batches(ctx, true);
 756
 757         /* We've flushed the original buffer if needed, now trigger a blit */
 758
 759         bool blit_res = util_gen_mipmap(
 760                                 pctx, prsrc, format,
 761                                 base_level, last_level,
 762                                 first_layer, last_layer,
 763                                 PIPE_TEX_FILTER_LINEAR);
 764
 765         /* If the blit was successful, flush once more. If it wasn't, well, let
 766          * the state tracker deal with it. */
 767
 768         if (blit_res)
 769                 panfrost_flush_all_batches(ctx, true);
 770
 771         return blit_res;
 772 }
 773
 774 /* Computes the address to a texture at a particular slice */
 775
 776 mali_ptr
 777 panfrost_get_texture_address(
 778         struct panfrost_resource *rsrc,
 779         unsigned level, unsigned face)
 780 {
 781         unsigned level_offset = rsrc->slices[level].offset;
 782         unsigned face_offset = face * rsrc->cubemap_stride;
 783
 784         return rsrc->bo->gpu + level_offset + face_offset;
 785 }
 786
 787 /* Given a resource that has already been allocated, hint that it should use a
 788  * given layout. These are suggestions, not commands; it is perfectly legal to
 789  * stub out this function, but there will be performance implications. */
 790
 791 void
 792 panfrost_resource_hint_layout(
 793                 struct panfrost_screen *screen,
 794                 struct panfrost_resource *rsrc,
 795                 enum panfrost_memory_layout layout,
 796                 signed weight)
 797 {
 798         /* Nothing to do, although a sophisticated implementation might store
 799          * the hint */
 800
 801         if (rsrc->layout == layout)
 802                 return;
 803
 804         /* We don't use the weight yet, but we should check that it's positive
 805          * (semantically meaning that we should choose the given `layout`) */
 806
 807         if (weight <= 0)
 808                 return;
 809
 810         /* Check if the preferred layout is legal for this buffer */
 811
 812         if (layout == PAN_AFBC) {
 813                 bool can_afbc = panfrost_format_supports_afbc(rsrc->base.format);
 814                 bool is_scanout = rsrc->base.bind &
 815                         (PIPE_BIND_DISPLAY_TARGET | PIPE_BIND_SCANOUT | PIPE_BIND_SHARED);
 816
 817                 if (!can_afbc || is_scanout)
 818                         return;
 819         }
 820
 821         /* Simple heuristic so far: if the resource is uninitialized, switch to
 822          * the hinted layout. If it is initialized, keep the original layout.
 823          * This misses some cases where it would be beneficial to switch and
 824          * blit. */
 825
 826         bool is_initialized = false;
 827
 828         for (unsigned i = 0; i < MAX_MIP_LEVELS; ++i)
 829                 is_initialized |= rsrc->slices[i].initialized;
 830
 831         if (is_initialized)
 832                 return;
 833
 834         /* We're uninitialized, so do a layout switch. Reinitialize slices. */
 835
 836         size_t new_size;
 837         rsrc->layout = layout;
 838         panfrost_setup_slices(rsrc, &new_size);
 839
 840         /* If we grew in size, reallocate the BO */
 841         if (new_size > rsrc->bo->size) {
 842                 panfrost_bo_unreference(rsrc->bo);
 843                 rsrc->bo = panfrost_bo_create(screen, new_size, PAN_BO_DELAY_MMAP);
 844         }
 845 }
 846
 847 static void
 848 panfrost_resource_set_stencil(struct pipe_resource *prsrc,
 849                               struct pipe_resource *stencil)
 850 {
 851         pan_resource(prsrc)->separate_stencil = pan_resource(stencil);
 852 }
 853
 854 static struct pipe_resource *
 855 panfrost_resource_get_stencil(struct pipe_resource *prsrc)
 856 {
 857         return &pan_resource(prsrc)->separate_stencil->base;
 858 }
 859
 860 static const struct u_transfer_vtbl transfer_vtbl = {
 861         .resource_create          = panfrost_resource_create,
 862         .resource_destroy         = panfrost_resource_destroy,
 863         .transfer_map             = panfrost_transfer_map,
 864         .transfer_unmap           = panfrost_transfer_unmap,
 865         .transfer_flush_region    = panfrost_transfer_flush_region,
 866         .get_internal_format      = panfrost_resource_get_internal_format,
 867         .set_stencil              = panfrost_resource_set_stencil,
 868         .get_stencil              = panfrost_resource_get_stencil,
 869 };
 870
 871 void
 872 panfrost_resource_screen_init(struct panfrost_screen *pscreen)
 873 {
 874         //pscreen->base.resource_create_with_modifiers =
 875         //        panfrost_resource_create_with_modifiers;
 876         pscreen->base.resource_create = u_transfer_helper_resource_create;
 877         pscreen->base.resource_destroy = u_transfer_helper_resource_destroy;
 878         pscreen->base.resource_from_handle = panfrost_resource_from_handle;
 879         pscreen->base.resource_get_handle = panfrost_resource_get_handle;
 880         pscreen->base.transfer_helper = u_transfer_helper_create(&transfer_vtbl,
 881                                         true, false,
 882                                         true, true);
 883 }
 884
 885 void
 886 panfrost_resource_context_init(struct pipe_context *pctx)
 887 {
 888         pctx->transfer_map = u_transfer_helper_transfer_map;
 889         pctx->transfer_unmap = u_transfer_helper_transfer_unmap;
 890         pctx->create_surface = panfrost_create_surface;
 891         pctx->surface_destroy = panfrost_surface_destroy;
 892         pctx->resource_copy_region = util_resource_copy_region;
 893         pctx->blit = panfrost_blit;
 894         pctx->generate_mipmap = panfrost_generate_mipmap;
 895         pctx->flush_resource = panfrost_flush_resource;
 896         pctx->invalidate_resource = panfrost_invalidate_resource;
 897         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 898         pctx->buffer_subdata = u_default_buffer_subdata;
 899         pctx->texture_subdata = u_default_texture_subdata;
 900 }