src/gallium/drivers/panfrost/pan_resource.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * Copyright 2014 Broadcom
   5  * Copyright 2018 Alyssa Rosenzweig
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  **************************************************************************/
  29
  30 #include <xf86drm.h>
  31 #include <fcntl.h>
  32 #include "drm-uapi/drm_fourcc.h"
  33
  34 #include "state_tracker/winsys_handle.h"
  35 #include "util/u_format.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_surface.h"
  38 #include "util/u_transfer.h"
  39 #include "util/u_transfer_helper.h"
  40
  41 #include "pan_context.h"
  42 #include "pan_screen.h"
  43 #include "pan_resource.h"
  44 #include "pan_swizzle.h"
  45 #include "pan_util.h"
  46
  47 static struct pipe_resource *
  48 panfrost_resource_from_handle(struct pipe_screen *pscreen,
  49                               const struct pipe_resource *templat,
  50                               struct winsys_handle *whandle,
  51                               unsigned usage)
  52 {
  53         struct panfrost_screen *screen = pan_screen(pscreen);
  54         struct panfrost_resource *rsc;
  55         struct pipe_resource *prsc;
  56
  57         assert(whandle->type == WINSYS_HANDLE_TYPE_FD);
  58
  59         rsc = CALLOC_STRUCT(panfrost_resource);
  60         if (!rsc)
  61                 return NULL;
  62
  63         prsc = &rsc->base;
  64
  65         *prsc = *templat;
  66
  67         pipe_reference_init(&prsc->reference, 1);
  68         prsc->screen = pscreen;
  69
  70         rsc->bo = screen->driver->import_bo(screen, whandle);
  71
  72         if (screen->ro) {
  73                 rsc->scanout =
  74                         renderonly_create_gpu_import_for_resource(prsc, screen->ro, NULL);
  75                 /* failure is expected in some cases.. */
  76         }
  77
  78         return prsc;
  79 }
  80
  81 static boolean
  82 panfrost_resource_get_handle(struct pipe_screen *pscreen,
  83                              struct pipe_context *ctx,
  84                              struct pipe_resource *pt,
  85                              struct winsys_handle *handle,
  86                              unsigned usage)
  87 {
  88         struct panfrost_screen *screen = pan_screen(pscreen);
  89         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
  90         struct renderonly_scanout *scanout = rsrc->scanout;
  91         int bytes_per_pixel = util_format_get_blocksize(rsrc->base.format);
  92         int stride = bytes_per_pixel * rsrc->base.width0; /* TODO: Alignment? */
  93
  94         handle->stride = stride;
  95         handle->modifier = DRM_FORMAT_MOD_INVALID;
  96
  97         if (handle->type == WINSYS_HANDLE_TYPE_SHARED) {
  98                 return FALSE;
  99         } else if (handle->type == WINSYS_HANDLE_TYPE_KMS) {
 100                 if (renderonly_get_handle(scanout, handle))
 101                         return TRUE;
 102
 103                 handle->handle = rsrc->bo->gem_handle;
 104                 return TRUE;
 105         } else if (handle->type == WINSYS_HANDLE_TYPE_FD) {
 106                 if (scanout) {
 107                         struct drm_prime_handle args = {
 108                                 .handle = scanout->handle,
 109                                 .flags = DRM_CLOEXEC,
 110                         };
 111
 112                         int ret = drmIoctl(screen->ro->kms_fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 113                         if (ret == -1)
 114                                 return FALSE;
 115
 116                         handle->handle = args.fd;
 117
 118                         return TRUE;
 119                 } else
 120                         return screen->driver->export_bo(screen, rsrc->bo->gem_handle, handle);
 121         }
 122
 123         return FALSE;
 124 }
 125
 126 static void
 127 panfrost_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 128 {
 129         //DBG("TODO %s\n", __func__);
 130 }
 131
 132 static void
 133 panfrost_blit(struct pipe_context *pipe,
 134               const struct pipe_blit_info *info)
 135 {
 136         /* STUB */
 137         DBG("Skipping blit XXX\n");
 138         return;
 139 }
 140
 141 static struct pipe_surface *
 142 panfrost_create_surface(struct pipe_context *pipe,
 143                         struct pipe_resource *pt,
 144                         const struct pipe_surface *surf_tmpl)
 145 {
 146         struct pipe_surface *ps = NULL;
 147
 148         ps = CALLOC_STRUCT(pipe_surface);
 149
 150         if (ps) {
 151                 pipe_reference_init(&ps->reference, 1);
 152                 pipe_resource_reference(&ps->texture, pt);
 153                 ps->context = pipe;
 154                 ps->format = surf_tmpl->format;
 155
 156                 if (pt->target != PIPE_BUFFER) {
 157                         assert(surf_tmpl->u.tex.level <= pt->last_level);
 158                         ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 159                         ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 160                         ps->u.tex.level = surf_tmpl->u.tex.level;
 161                         ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 162                         ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 163                 } else {
 164                         /* setting width as number of elements should get us correct renderbuffer width */
 165                         ps->width = surf_tmpl->u.buf.last_element - surf_tmpl->u.buf.first_element + 1;
 166                         ps->height = pt->height0;
 167                         ps->u.buf.first_element = surf_tmpl->u.buf.first_element;
 168                         ps->u.buf.last_element = surf_tmpl->u.buf.last_element;
 169                         assert(ps->u.buf.first_element <= ps->u.buf.last_element);
 170                         assert(ps->u.buf.last_element < ps->width);
 171                 }
 172         }
 173
 174         return ps;
 175 }
 176
 177 static void
 178 panfrost_surface_destroy(struct pipe_context *pipe,
 179                          struct pipe_surface *surf)
 180 {
 181         assert(surf->texture);
 182         pipe_resource_reference(&surf->texture, NULL);
 183         free(surf);
 184 }
 185
 186 static struct panfrost_bo *
 187 panfrost_create_bo(struct panfrost_screen *screen, const struct pipe_resource *template)
 188 {
 189         struct panfrost_bo *bo = CALLOC_STRUCT(panfrost_bo);
 190
 191         /* Calculate the size of the bo */
 192
 193         int bytes_per_pixel = util_format_get_blocksize(template->format);
 194         int stride = bytes_per_pixel * template->width0; /* TODO: Alignment? */
 195         size_t sz = stride;
 196
 197         if (template->height0) sz *= template->height0;
 198         if (template->depth0) sz *= template->depth0;
 199
 200         /* Tiling textures is almost always faster, unless we only use it once */
 201         bo->tiled = (template->usage != PIPE_USAGE_STREAM) && (template->bind & PIPE_BIND_SAMPLER_VIEW);
 202
 203         if (bo->tiled) {
 204                 /* For tiled, we don't map directly, so just malloc any old buffer */
 205
 206                 for (int l = 0; l < (template->last_level + 1); ++l) {
 207                         bo->cpu[l] = malloc(sz);
 208                         sz >>= 2;
 209                 }
 210         } else {
 211                 /* But for linear, we can! */
 212
 213                 struct pb_slab_entry *entry = pb_slab_alloc(&screen->slabs, sz, HEAP_TEXTURE);
 214                 struct panfrost_memory_entry *p_entry = (struct panfrost_memory_entry *) entry;
 215                 struct panfrost_memory *backing = (struct panfrost_memory *) entry->slab;
 216                 bo->entry[0] = p_entry;
 217                 bo->cpu[0] = backing->cpu + p_entry->offset;
 218                 bo->gpu[0] = backing->gpu + p_entry->offset;
 219
 220                 /* TODO: Mipmap */
 221         }
 222
 223         return bo;
 224 }
 225
 226 static struct pipe_resource *
 227 panfrost_resource_create(struct pipe_screen *screen,
 228                          const struct pipe_resource *template)
 229 {
 230         struct panfrost_resource *so = CALLOC_STRUCT(panfrost_resource);
 231         struct panfrost_screen *pscreen = (struct panfrost_screen *) screen;
 232
 233         so->base = *template;
 234         so->base.screen = screen;
 235
 236         pipe_reference_init(&so->base.reference, 1);
 237
 238         /* Make sure we're familiar */
 239         switch (template->target) {
 240                 case PIPE_BUFFER:
 241                 case PIPE_TEXTURE_1D:
 242                 case PIPE_TEXTURE_2D:
 243                 case PIPE_TEXTURE_3D:
 244                 case PIPE_TEXTURE_RECT:
 245                         break;
 246                 default:
 247                         DBG("Unknown texture target %d\n", template->target);
 248                         assert(0);
 249         }
 250
 251         if (template->bind & PIPE_BIND_DISPLAY_TARGET ||
 252             template->bind & PIPE_BIND_SCANOUT ||
 253             template->bind & PIPE_BIND_SHARED) {
 254                 struct pipe_resource scanout_templat = *template;
 255                 struct renderonly_scanout *scanout;
 256                 struct winsys_handle handle;
 257
 258                 /* TODO: align width0 and height0? */
 259
 260                 scanout = renderonly_scanout_for_resource(&scanout_templat,
 261                                                           pscreen->ro, &handle);
 262                 if (!scanout)
 263                         return NULL;
 264
 265                 assert(handle.type == WINSYS_HANDLE_TYPE_FD);
 266                 /* TODO: handle modifiers? */
 267                 so = pan_resource(screen->resource_from_handle(screen, template,
 268                                                                  &handle,
 269                                                                  PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE));
 270                 close(handle.handle);
 271                 if (!so)
 272                         return NULL;
 273
 274                 so->scanout = scanout;
 275                 pscreen->display_target = so;
 276         } else {
 277                 so->bo = panfrost_create_bo(pscreen, template);
 278         }
 279
 280         return (struct pipe_resource *)so;
 281 }
 282
 283 static void
 284 panfrost_destroy_bo(struct panfrost_screen *screen, struct panfrost_bo *pbo)
 285 {
 286         struct panfrost_bo *bo = (struct panfrost_bo *)pbo;
 287
 288         for (int l = 0; l < MAX_MIP_LEVELS; ++l) {
 289                 if (bo->entry[l] != NULL) {
 290                         /* Most allocations have an entry to free */
 291                         bo->entry[l]->freed = true;
 292                         pb_slab_free(&screen->slabs, &bo->entry[l]->base);
 293                 }
 294         }
 295
 296         if (bo->tiled) {
 297                 /* Tiled has a malloc'd CPU, so just plain ol' free needed */
 298
 299                 for (int l = 0; l < MAX_MIP_LEVELS; ++l) {
 300                         free(bo->cpu[l]);
 301                 }
 302         }
 303
 304         if (bo->has_afbc) {
 305                 /* TODO */
 306                 DBG("--leaking afbc (%d bytes)--\n", bo->afbc_metadata_size);
 307         }
 308
 309         if (bo->has_checksum) {
 310                 /* TODO */
 311                 DBG("--leaking checksum (%zd bytes)--\n", bo->checksum_slab.size);
 312         }
 313
 314         if (bo->imported) {
 315                 screen->driver->free_imported_bo(screen, bo);
 316         }
 317 }
 318
 319 static void
 320 panfrost_resource_destroy(struct pipe_screen *screen,
 321                           struct pipe_resource *pt)
 322 {
 323         struct panfrost_screen *pscreen = pan_screen(screen);
 324         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
 325
 326         if (rsrc->scanout)
 327                 renderonly_scanout_destroy(rsrc->scanout, pscreen->ro);
 328
 329         if (rsrc->bo)
 330                 panfrost_destroy_bo(pscreen, rsrc->bo);
 331
 332         FREE(rsrc);
 333 }
 334
 335 static uint8_t *
 336 panfrost_map_bo(struct panfrost_context *ctx, struct pipe_transfer *transfer)
 337 {
 338         struct panfrost_bo *bo = (struct panfrost_bo *)pan_resource(transfer->resource)->bo;
 339
 340         /* If non-zero level, it's a mipmapped resource and needs to be treated as such */
 341         bo->is_mipmap |= transfer->level;
 342
 343         if (transfer->usage & PIPE_TRANSFER_MAP_DIRECTLY && bo->tiled) {
 344                 /* We cannot directly map tiled textures */
 345                 return NULL;
 346         }
 347
 348         if (transfer->resource->bind & PIPE_BIND_DEPTH_STENCIL) {
 349                 /* Mipmapped readpixels?! */
 350                 assert(transfer->level == 0);
 351
 352                 /* Set the CPU mapping to that of the depth/stencil buffer in memory, untiled */
 353                 bo->cpu[transfer->level] = ctx->depth_stencil_buffer.cpu;
 354         }
 355
 356         return bo->cpu[transfer->level];
 357 }
 358
 359 static void *
 360 panfrost_transfer_map(struct pipe_context *pctx,
 361                       struct pipe_resource *resource,
 362                       unsigned level,
 363                       unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 364                       const struct pipe_box *box,
 365                       struct pipe_transfer **out_transfer)
 366 {
 367         struct panfrost_context *ctx = pan_context(pctx);
 368         int bytes_per_pixel = util_format_get_blocksize(resource->format);
 369         int stride = bytes_per_pixel * resource->width0; /* TODO: Alignment? */
 370         uint8_t *cpu;
 371
 372         struct pipe_transfer *transfer = CALLOC_STRUCT(pipe_transfer);
 373         transfer->level = level;
 374         transfer->usage = usage;
 375         transfer->box = *box;
 376         transfer->stride = stride;
 377         assert(!transfer->box.z);
 378
 379         pipe_resource_reference(&transfer->resource, resource);
 380
 381         *out_transfer = transfer;
 382
 383         if (resource->bind & PIPE_BIND_DISPLAY_TARGET ||
 384             resource->bind & PIPE_BIND_SCANOUT ||
 385             resource->bind & PIPE_BIND_SHARED) {
 386                 /* Mipmapped readpixels?! */
 387                 assert(level == 0);
 388
 389                 /* Force a flush -- kill the pipeline */
 390                 panfrost_flush(pctx, NULL, PIPE_FLUSH_END_OF_FRAME);
 391         }
 392
 393         cpu = panfrost_map_bo(ctx, transfer);
 394         if (cpu == NULL)
 395                 return NULL;
 396
 397         return cpu + transfer->box.x * bytes_per_pixel + transfer->box.y * stride;
 398 }
 399
 400 static void
 401 panfrost_tile_texture(struct panfrost_screen *screen, struct panfrost_resource *rsrc, int level)
 402 {
 403         struct panfrost_bo *bo = (struct panfrost_bo *)rsrc->bo;
 404         int bytes_per_pixel = util_format_get_blocksize(rsrc->base.format);
 405         int stride = bytes_per_pixel * rsrc->base.width0; /* TODO: Alignment? */
 406
 407         int width = rsrc->base.width0 >> level;
 408         int height = rsrc->base.height0 >> level;
 409
 410         /* Estimate swizzled bitmap size. Slight overestimates are fine.
 411          * Underestimates will result in memory corruption or worse. */
 412
 413         int swizzled_sz = panfrost_swizzled_size(width, height, bytes_per_pixel);
 414
 415         /* Save the entry. But if there was already an entry here (from a
 416          * previous upload of the resource), free that one so we don't leak */
 417
 418         if (bo->entry[level] != NULL) {
 419                 bo->entry[level]->freed = true;
 420                 pb_slab_free(&screen->slabs, &bo->entry[level]->base);
 421         }
 422
 423         /* Allocate the transfer given that known size but do not copy */
 424         struct pb_slab_entry *entry = pb_slab_alloc(&screen->slabs, swizzled_sz, HEAP_TEXTURE);
 425         struct panfrost_memory_entry *p_entry = (struct panfrost_memory_entry *) entry;
 426         struct panfrost_memory *backing = (struct panfrost_memory *) entry->slab;
 427         uint8_t *swizzled = backing->cpu + p_entry->offset;
 428
 429         bo->entry[level] = p_entry;
 430         bo->gpu[level] = backing->gpu + p_entry->offset;
 431
 432         /* Run actual texture swizzle, writing directly to the mapped
 433          * GPU chunk we allocated */
 434
 435         panfrost_texture_swizzle(width, height, bytes_per_pixel, stride, bo->cpu[level], swizzled);
 436 }
 437
 438 static void
 439 panfrost_unmap_bo(struct panfrost_context *ctx,
 440                          struct pipe_transfer *transfer)
 441 {
 442         struct panfrost_bo *bo = (struct panfrost_bo *)pan_resource(transfer->resource)->bo;
 443
 444         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 445                 if (transfer->resource->target == PIPE_TEXTURE_2D) {
 446                         struct panfrost_resource *prsrc = (struct panfrost_resource *) transfer->resource;
 447
 448                         /* Gallium thinks writeback happens here; instead, this is our cue to tile */
 449                         if (bo->has_afbc) {
 450                                 DBG("Warning: writes to afbc surface can't possibly work out well for you...\n");
 451                         } else if (bo->tiled) {
 452                                 struct pipe_context *gallium = (struct pipe_context *) ctx;
 453                                 struct panfrost_screen *screen = pan_screen(gallium->screen);
 454                                 panfrost_tile_texture(screen, prsrc, transfer->level);
 455                         }
 456                 }
 457         }
 458 }
 459
 460 static void
 461 panfrost_transfer_unmap(struct pipe_context *pctx,
 462                         struct pipe_transfer *transfer)
 463 {
 464         struct panfrost_context *ctx = pan_context(pctx);
 465
 466         panfrost_unmap_bo(ctx, transfer);
 467
 468         /* Derefence the resource */
 469         pipe_resource_reference(&transfer->resource, NULL);
 470
 471         /* Transfer itself is CALLOCed at the moment */
 472         free(transfer);
 473 }
 474
 475 static struct pb_slab *
 476 panfrost_slab_alloc(void *priv, unsigned heap, unsigned entry_size, unsigned group_index)
 477 {
 478         struct panfrost_screen *screen = (struct panfrost_screen *) priv;
 479         struct panfrost_memory *mem = CALLOC_STRUCT(panfrost_memory);
 480
 481         size_t slab_size = (1 << (MAX_SLAB_ENTRY_SIZE + 1));
 482
 483         mem->slab.num_entries = slab_size / entry_size;
 484         mem->slab.num_free = mem->slab.num_entries;
 485
 486         LIST_INITHEAD(&mem->slab.free);
 487         for (unsigned i = 0; i < mem->slab.num_entries; ++i) {
 488                 /* Create a slab entry */
 489                 struct panfrost_memory_entry *entry = CALLOC_STRUCT(panfrost_memory_entry);
 490                 entry->offset = entry_size * i;
 491
 492                 entry->base.slab = &mem->slab;
 493                 entry->base.group_index = group_index;
 494
 495                 LIST_ADDTAIL(&entry->base.head, &mem->slab.free);
 496         }
 497
 498         /* Actually allocate the memory from kernel-space. Mapped, same_va, no
 499          * special flags */
 500
 501         screen->driver->allocate_slab(screen, mem, slab_size / 4096, true, 0, 0, 0);
 502
 503         return &mem->slab;
 504 }
 505
 506 static bool
 507 panfrost_slab_can_reclaim(void *priv, struct pb_slab_entry *entry)
 508 {
 509         struct panfrost_memory_entry *p_entry = (struct panfrost_memory_entry *) entry;
 510         return p_entry->freed;
 511 }
 512
 513 static void
 514 panfrost_slab_free(void *priv, struct pb_slab *slab)
 515 {
 516         struct panfrost_memory *mem = (struct panfrost_memory *) slab;
 517         struct panfrost_screen *screen = (struct panfrost_screen *) priv;
 518
 519         screen->driver->free_slab(screen, mem);
 520 }
 521
 522 static void
 523 panfrost_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 524 {
 525         //DBG("TODO %s\n", __func__);
 526 }
 527
 528 static enum pipe_format
 529 panfrost_resource_get_internal_format(struct pipe_resource *prsrc)
 530 {
 531         return prsrc->format;
 532 }
 533
 534 static void
 535 panfrost_resource_set_stencil(struct pipe_resource *prsrc,
 536                               struct pipe_resource *stencil)
 537 {
 538         pan_resource(prsrc)->separate_stencil = pan_resource(stencil);
 539 }
 540
 541 static struct pipe_resource *
 542 panfrost_resource_get_stencil(struct pipe_resource *prsrc)
 543 {
 544         return &pan_resource(prsrc)->separate_stencil->base;
 545 }
 546
 547 static const struct u_transfer_vtbl transfer_vtbl = {
 548         .resource_create          = panfrost_resource_create,
 549         .resource_destroy         = panfrost_resource_destroy,
 550         .transfer_map             = panfrost_transfer_map,
 551         .transfer_unmap           = panfrost_transfer_unmap,
 552         .transfer_flush_region    = u_default_transfer_flush_region,
 553         .get_internal_format      = panfrost_resource_get_internal_format,
 554         .set_stencil              = panfrost_resource_set_stencil,
 555         .get_stencil              = panfrost_resource_get_stencil,
 556 };
 557
 558 void
 559 panfrost_resource_screen_init(struct panfrost_screen *pscreen)
 560 {
 561         //pscreen->base.resource_create_with_modifiers =
 562         //        panfrost_resource_create_with_modifiers;
 563         pscreen->base.resource_create = u_transfer_helper_resource_create;
 564         pscreen->base.resource_destroy = u_transfer_helper_resource_destroy;
 565         pscreen->base.resource_from_handle = panfrost_resource_from_handle;
 566         pscreen->base.resource_get_handle = panfrost_resource_get_handle;
 567         pscreen->base.transfer_helper = u_transfer_helper_create(&transfer_vtbl,
 568                                                             true, false,
 569                                                             true, true);
 570
 571         pb_slabs_init(&pscreen->slabs,
 572                         MIN_SLAB_ENTRY_SIZE,
 573                         MAX_SLAB_ENTRY_SIZE,
 574
 575                         3, /* Number of heaps */
 576
 577                         pscreen,
 578
 579                         panfrost_slab_can_reclaim,
 580                         panfrost_slab_alloc,
 581                         panfrost_slab_free);
 582 }
 583
 584 void
 585 panfrost_resource_context_init(struct pipe_context *pctx)
 586 {
 587         pctx->transfer_map = u_transfer_helper_transfer_map;
 588         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 589         pctx->transfer_unmap = u_transfer_helper_transfer_unmap;
 590         pctx->buffer_subdata = u_default_buffer_subdata;
 591         pctx->create_surface = panfrost_create_surface;
 592         pctx->surface_destroy = panfrost_surface_destroy;
 593         pctx->resource_copy_region = util_resource_copy_region;
 594         pctx->blit = panfrost_blit;
 595         //pctx->generate_mipmap = panfrost_generate_mipmap;
 596         pctx->flush_resource = panfrost_flush_resource;
 597         pctx->invalidate_resource = panfrost_invalidate_resource;
 598         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
 599         pctx->buffer_subdata = u_default_buffer_subdata;
 600         pctx->texture_subdata = u_default_texture_subdata;
 601 }