src/gallium/drivers/etnaviv/etnaviv_resource.c

   1 /*
   2  * Copyright (c) 2012-2015 Etnaviv Project
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Wladimir J. van der Laan <laanwj@gmail.com>
  25  */
  26
  27 #include "etnaviv_resource.h"
  28
  29 #include "hw/common.xml.h"
  30
  31 #include "etnaviv_context.h"
  32 #include "etnaviv_debug.h"
  33 #include "etnaviv_screen.h"
  34 #include "etnaviv_translate.h"
  35
  36 #include "util/u_inlines.h"
  37 #include "util/u_memory.h"
  38
  39 #include <drm_fourcc.h>
  40
  41 #ifndef DRM_FORMAT_MOD_INVALID
  42 #define DRM_FORMAT_MOD_INVALID ((1ULL<<56) - 1)
  43 #endif
  44
  45 static enum etna_surface_layout modifier_to_layout(uint64_t modifier)
  46 {
  47    switch (modifier) {
  48    case DRM_FORMAT_MOD_VIVANTE_TILED:
  49       return ETNA_LAYOUT_TILED;
  50    case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
  51       return ETNA_LAYOUT_SUPER_TILED;
  52    case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
  53       return ETNA_LAYOUT_MULTI_TILED;
  54    case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
  55       return ETNA_LAYOUT_MULTI_SUPERTILED;
  56    case DRM_FORMAT_MOD_LINEAR:
  57    default:
  58       return ETNA_LAYOUT_LINEAR;
  59    }
  60 }
  61
  62 static uint64_t layout_to_modifier(enum etna_surface_layout layout)
  63 {
  64    switch (layout) {
  65    case ETNA_LAYOUT_TILED:
  66       return DRM_FORMAT_MOD_VIVANTE_TILED;
  67    case ETNA_LAYOUT_SUPER_TILED:
  68       return DRM_FORMAT_MOD_VIVANTE_SUPER_TILED;
  69    case ETNA_LAYOUT_MULTI_TILED:
  70       return DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED;
  71    case ETNA_LAYOUT_MULTI_SUPERTILED:
  72       return DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED;
  73    case ETNA_LAYOUT_LINEAR:
  74       return DRM_FORMAT_MOD_LINEAR;
  75    default:
  76       return DRM_FORMAT_MOD_INVALID;
  77    }
  78 }
  79
  80 /* A tile is 4x4 pixels, having 'screen->specs.bits_per_tile' of tile status.
  81  * So, in a buffer of N pixels, there are N / (4 * 4) tiles.
  82  * We need N * screen->specs.bits_per_tile / (4 * 4) bits of tile status, or
  83  * N * screen->specs.bits_per_tile / (4 * 4 * 8) bytes.
  84  */
  85 bool
  86 etna_screen_resource_alloc_ts(struct pipe_screen *pscreen,
  87                               struct etna_resource *rsc)
  88 {
  89    struct etna_screen *screen = etna_screen(pscreen);
  90    size_t rt_ts_size, ts_layer_stride, pixels;
  91
  92    assert(!rsc->ts_bo);
  93
  94    /* TS only for level 0 -- XXX is this formula correct? */
  95    pixels = rsc->levels[0].layer_stride / util_format_get_blocksize(rsc->base.format);
  96    ts_layer_stride = align(pixels * screen->specs.bits_per_tile / 0x80,
  97                            0x100 * screen->specs.pixel_pipes);
  98    rt_ts_size = ts_layer_stride * rsc->base.array_size;
  99    if (rt_ts_size == 0)
 100       return true;
 101
 102    DBG_F(ETNA_DBG_RESOURCE_MSGS, "%p: Allocating tile status of size %zu",
 103          rsc, rt_ts_size);
 104
 105    struct etna_bo *rt_ts;
 106    rt_ts = etna_bo_new(screen->dev, rt_ts_size, DRM_ETNA_GEM_CACHE_WC);
 107
 108    if (unlikely(!rt_ts)) {
 109       BUG("Problem allocating tile status for resource");
 110       return false;
 111    }
 112
 113    rsc->ts_bo = rt_ts;
 114    rsc->levels[0].ts_offset = 0;
 115    rsc->levels[0].ts_layer_stride = ts_layer_stride;
 116    rsc->levels[0].ts_size = rt_ts_size;
 117
 118    /* It is important to initialize the TS, as random pattern
 119     * can result in crashes. Do this on the CPU as this only happens once
 120     * per surface anyway and it's a small area, so it may not be worth
 121     * queuing this to the GPU. */
 122    void *ts_map = etna_bo_map(rt_ts);
 123    memset(ts_map, screen->specs.ts_clear_value, rt_ts_size);
 124
 125    return true;
 126 }
 127
 128 static boolean
 129 etna_screen_can_create_resource(struct pipe_screen *pscreen,
 130                                 const struct pipe_resource *templat)
 131 {
 132    struct etna_screen *screen = etna_screen(pscreen);
 133    if (!translate_samples_to_xyscale(templat->nr_samples, NULL, NULL, NULL))
 134       return false;
 135
 136    /* templat->bind is not set here, so we must use the minimum sizes */
 137    uint max_size =
 138       MIN2(screen->specs.max_rendertarget_size, screen->specs.max_texture_size);
 139
 140    if (templat->width0 > max_size || templat->height0 > max_size)
 141       return false;
 142
 143    return true;
 144 }
 145
 146 static unsigned
 147 setup_miptree(struct etna_resource *rsc, unsigned paddingX, unsigned paddingY,
 148               unsigned msaa_xscale, unsigned msaa_yscale)
 149 {
 150    struct pipe_resource *prsc = &rsc->base;
 151    unsigned level, size = 0;
 152    unsigned width = prsc->width0;
 153    unsigned height = prsc->height0;
 154    unsigned depth = prsc->depth0;
 155
 156    for (level = 0; level <= prsc->last_level; level++) {
 157       struct etna_resource_level *mip = &rsc->levels[level];
 158
 159       mip->width = width;
 160       mip->height = height;
 161       mip->padded_width = align(width * msaa_xscale, paddingX);
 162       mip->padded_height = align(height * msaa_yscale, paddingY);
 163       mip->stride = util_format_get_stride(prsc->format, mip->padded_width);
 164       mip->offset = size;
 165       mip->layer_stride = mip->stride * util_format_get_nblocksy(prsc->format, mip->padded_height);
 166       mip->size = prsc->array_size * mip->layer_stride;
 167
 168       /* align levels to 64 bytes to be able to render to them */
 169       size += align(mip->size, ETNA_PE_ALIGNMENT) * depth;
 170
 171       width = u_minify(width, 1);
 172       height = u_minify(height, 1);
 173       depth = u_minify(depth, 1);
 174    }
 175
 176    return size;
 177 }
 178
 179 /* Create a new resource object, using the given template info */
 180 struct pipe_resource *
 181 etna_resource_alloc(struct pipe_screen *pscreen, unsigned layout,
 182                     uint64_t modifier, const struct pipe_resource *templat)
 183 {
 184    struct etna_screen *screen = etna_screen(pscreen);
 185    struct etna_resource *rsc;
 186    unsigned size;
 187
 188    DBG_F(ETNA_DBG_RESOURCE_MSGS,
 189          "target=%d, format=%s, %ux%ux%u, array_size=%u, "
 190          "last_level=%u, nr_samples=%u, usage=%u, bind=%x, flags=%x",
 191          templat->target, util_format_name(templat->format), templat->width0,
 192          templat->height0, templat->depth0, templat->array_size,
 193          templat->last_level, templat->nr_samples, templat->usage,
 194          templat->bind, templat->flags);
 195
 196    /* Determine scaling for antialiasing, allow override using debug flag */
 197    int nr_samples = templat->nr_samples;
 198    if ((templat->bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_DEPTH_STENCIL)) &&
 199        !(templat->bind & PIPE_BIND_SAMPLER_VIEW)) {
 200       if (DBG_ENABLED(ETNA_DBG_MSAA_2X))
 201          nr_samples = 2;
 202       if (DBG_ENABLED(ETNA_DBG_MSAA_4X))
 203          nr_samples = 4;
 204    }
 205
 206    int msaa_xscale = 1, msaa_yscale = 1;
 207    if (!translate_samples_to_xyscale(nr_samples, &msaa_xscale, &msaa_yscale, NULL)) {
 208       /* Number of samples not supported */
 209       return NULL;
 210    }
 211
 212    /* Determine needed padding (alignment of height/width) */
 213    unsigned paddingX = 0, paddingY = 0;
 214    unsigned halign = TEXTURE_HALIGN_FOUR;
 215    if (!util_format_is_compressed(templat->format)) {
 216       /* If we have the TEXTURE_HALIGN feature, we can always align to the
 217        * resolve engine's width.  If not, we must not align resources used
 218        * only for textures. */
 219       bool rs_align = VIV_FEATURE(screen, chipMinorFeatures1, TEXTURE_HALIGN) ||
 220                       !etna_resource_sampler_only(templat);
 221       etna_layout_multiple(layout, screen->specs.pixel_pipes, rs_align, &paddingX,
 222                            &paddingY, &halign);
 223       assert(paddingX && paddingY);
 224    } else {
 225       /* Compressed textures are padded to their block size, but we don't have
 226        * to do anything special for that. */
 227       paddingX = 1;
 228       paddingY = 1;
 229    }
 230
 231    if (templat->target != PIPE_BUFFER)
 232       etna_adjust_rs_align(screen->specs.pixel_pipes, NULL, &paddingY);
 233
 234    if (templat->bind & PIPE_BIND_SCANOUT) {
 235       struct pipe_resource scanout_templat = *templat;
 236       struct renderonly_scanout *scanout;
 237       struct winsys_handle handle;
 238
 239       /* pad scanout buffer size to be compatible with the RS */
 240       if (modifier == DRM_FORMAT_MOD_LINEAR)
 241          etna_adjust_rs_align(screen->specs.pixel_pipes, &paddingX, &paddingY);
 242
 243       scanout_templat.width0 = align(scanout_templat.width0, paddingX);
 244       scanout_templat.height0 = align(scanout_templat.height0, paddingY);
 245
 246       scanout = renderonly_scanout_for_resource(&scanout_templat,
 247                                                 screen->ro, &handle);
 248       if (!scanout)
 249          return NULL;
 250
 251       assert(handle.type == DRM_API_HANDLE_TYPE_FD);
 252       handle.modifier = modifier;
 253       rsc = etna_resource(pscreen->resource_from_handle(pscreen, templat,
 254                                                         &handle,
 255                                                         PIPE_HANDLE_USAGE_WRITE));
 256       close(handle.handle);
 257       if (!rsc)
 258          return NULL;
 259
 260       rsc->scanout = scanout;
 261
 262       return &rsc->base;
 263    }
 264
 265    rsc = CALLOC_STRUCT(etna_resource);
 266    if (!rsc)
 267       return NULL;
 268
 269    rsc->base = *templat;
 270    rsc->base.screen = pscreen;
 271    rsc->base.nr_samples = nr_samples;
 272    rsc->layout = layout;
 273    rsc->halign = halign;
 274
 275    pipe_reference_init(&rsc->base.reference, 1);
 276    list_inithead(&rsc->list);
 277
 278    size = setup_miptree(rsc, paddingX, paddingY, msaa_xscale, msaa_yscale);
 279
 280    uint32_t flags = DRM_ETNA_GEM_CACHE_WC;
 281    if (templat->bind & PIPE_BIND_VERTEX_BUFFER)
 282       flags |= DRM_ETNA_GEM_FORCE_MMU;
 283    struct etna_bo *bo = etna_bo_new(screen->dev, size, flags);
 284    if (unlikely(bo == NULL)) {
 285       BUG("Problem allocating video memory for resource");
 286       goto free_rsc;
 287    }
 288
 289    rsc->bo = bo;
 290    rsc->ts_bo = 0; /* TS is only created when first bound to surface */
 291
 292    if (DBG_ENABLED(ETNA_DBG_ZERO)) {
 293       void *map = etna_bo_map(bo);
 294       memset(map, 0, size);
 295    }
 296
 297    return &rsc->base;
 298
 299 free_rsc:
 300    FREE(rsc);
 301    return NULL;
 302 }
 303
 304 static struct pipe_resource *
 305 etna_resource_create(struct pipe_screen *pscreen,
 306                      const struct pipe_resource *templat)
 307 {
 308    struct etna_screen *screen = etna_screen(pscreen);
 309
 310    /* Figure out what tiling to use -- for now, assume that texture cannot be linear.
 311     * there is a capability LINEAR_TEXTURE_SUPPORT (supported on gc880 and
 312     * gc2000 at least), but not sure how it works.
 313     * Buffers always have LINEAR layout.
 314     */
 315    unsigned layout = ETNA_LAYOUT_LINEAR;
 316    if (etna_resource_sampler_only(templat)) {
 317       /* The buffer is only used for texturing, so create something
 318        * directly compatible with the sampler.  Such a buffer can
 319        * never be rendered to. */
 320       layout = ETNA_LAYOUT_TILED;
 321
 322       if (util_format_is_compressed(templat->format))
 323          layout = ETNA_LAYOUT_LINEAR;
 324    } else if (templat->target != PIPE_BUFFER) {
 325       bool want_multitiled = false;
 326       bool want_supertiled = screen->specs.can_supertile;
 327
 328       /* When this GPU supports single-buffer rendering, don't ever enable
 329        * multi-tiling. This replicates the blob behavior on GC3000.
 330        */
 331       if (!screen->specs.single_buffer)
 332          want_multitiled = screen->specs.pixel_pipes > 1;
 333
 334       /* Keep single byte blocksized resources as tiled, since we
 335        * are unable to use the RS blit to de-tile them. However,
 336        * if they're used as a render target or depth/stencil, they
 337        * must be multi-tiled for GPUs with multiple pixel pipes.
 338        * Ignore depth/stencil here, but it is an error for a render
 339        * target.
 340        */
 341       if (util_format_get_blocksize(templat->format) == 1 &&
 342           !(templat->bind & PIPE_BIND_DEPTH_STENCIL)) {
 343          assert(!(templat->bind & PIPE_BIND_RENDER_TARGET && want_multitiled));
 344          want_multitiled = want_supertiled = false;
 345       }
 346
 347       layout = ETNA_LAYOUT_BIT_TILE;
 348       if (want_multitiled)
 349          layout |= ETNA_LAYOUT_BIT_MULTI;
 350       if (want_supertiled)
 351          layout |= ETNA_LAYOUT_BIT_SUPER;
 352    }
 353
 354    if (templat->target == PIPE_TEXTURE_3D)
 355       layout = ETNA_LAYOUT_LINEAR;
 356
 357    /* modifier is only used for scanout surfaces, so safe to use LINEAR here */
 358    return etna_resource_alloc(pscreen, layout, DRM_FORMAT_MOD_LINEAR, templat);
 359 }
 360
 361 enum modifier_priority {
 362    MODIFIER_PRIORITY_INVALID = 0,
 363    MODIFIER_PRIORITY_LINEAR,
 364    MODIFIER_PRIORITY_SPLIT_TILED,
 365    MODIFIER_PRIORITY_SPLIT_SUPER_TILED,
 366    MODIFIER_PRIORITY_TILED,
 367    MODIFIER_PRIORITY_SUPER_TILED,
 368 };
 369
 370 const uint64_t priority_to_modifier[] = {
 371    [MODIFIER_PRIORITY_INVALID] = DRM_FORMAT_MOD_INVALID,
 372    [MODIFIER_PRIORITY_LINEAR] = DRM_FORMAT_MOD_LINEAR,
 373    [MODIFIER_PRIORITY_SPLIT_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED,
 374    [MODIFIER_PRIORITY_SPLIT_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED,
 375    [MODIFIER_PRIORITY_TILED] = DRM_FORMAT_MOD_VIVANTE_TILED,
 376    [MODIFIER_PRIORITY_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SUPER_TILED,
 377 };
 378
 379 static uint64_t
 380 select_best_modifier(const struct etna_screen * screen,
 381                      const uint64_t *modifiers, const unsigned count)
 382 {
 383    enum modifier_priority prio = MODIFIER_PRIORITY_INVALID;
 384
 385    for (int i = 0; i < count; i++) {
 386       switch (modifiers[i]) {
 387       case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
 388          if ((screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer) ||
 389              !screen->specs.can_supertile)
 390             break;
 391          prio = MAX2(prio, MODIFIER_PRIORITY_SUPER_TILED);
 392          break;
 393       case DRM_FORMAT_MOD_VIVANTE_TILED:
 394          if (screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer)
 395             break;
 396          prio = MAX2(prio, MODIFIER_PRIORITY_TILED);
 397          break;
 398       case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
 399          if ((screen->specs.pixel_pipes < 2) || !screen->specs.can_supertile)
 400             break;
 401          prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_SUPER_TILED);
 402          break;
 403       case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
 404          if (screen->specs.pixel_pipes < 2)
 405             break;
 406          prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_TILED);
 407          break;
 408       case DRM_FORMAT_MOD_LINEAR:
 409          prio = MAX2(prio, MODIFIER_PRIORITY_LINEAR);
 410          break;
 411       case DRM_FORMAT_MOD_INVALID:
 412       default:
 413          break;
 414       }
 415    }
 416
 417    return priority_to_modifier[prio];
 418 }
 419
 420 static struct pipe_resource *
 421 etna_resource_create_modifiers(struct pipe_screen *pscreen,
 422                                const struct pipe_resource *templat,
 423                                const uint64_t *modifiers, int count)
 424 {
 425    struct etna_screen *screen = etna_screen(pscreen);
 426    struct pipe_resource tmpl = *templat;
 427    uint64_t modifier = select_best_modifier(screen, modifiers, count);
 428
 429    if (modifier == DRM_FORMAT_MOD_INVALID)
 430       return NULL;
 431
 432    /*
 433     * We currently assume that all buffers allocated through this interface
 434     * should be scanout enabled.
 435     */
 436    tmpl.bind |= PIPE_BIND_SCANOUT;
 437
 438    return etna_resource_alloc(pscreen, modifier_to_layout(modifier),
 439                               modifier, &tmpl);
 440 }
 441
 442 static void
 443 etna_resource_changed(struct pipe_screen *pscreen, struct pipe_resource *prsc)
 444 {
 445    struct etna_resource *res = etna_resource(prsc);
 446
 447    if (res->external)
 448       etna_resource(res->external)->seqno++;
 449    else
 450       res->seqno++;
 451 }
 452
 453 static void
 454 etna_resource_destroy(struct pipe_screen *pscreen, struct pipe_resource *prsc)
 455 {
 456    struct etna_resource *rsc = etna_resource(prsc);
 457
 458    if (rsc->bo)
 459       etna_bo_del(rsc->bo);
 460
 461    if (rsc->ts_bo)
 462       etna_bo_del(rsc->ts_bo);
 463
 464    if (rsc->scanout)
 465       renderonly_scanout_destroy(rsc->scanout, etna_screen(pscreen)->ro);
 466
 467    list_delinit(&rsc->list);
 468
 469    pipe_resource_reference(&rsc->texture, NULL);
 470    pipe_resource_reference(&rsc->external, NULL);
 471
 472    FREE(rsc);
 473 }
 474
 475 static struct pipe_resource *
 476 etna_resource_from_handle(struct pipe_screen *pscreen,
 477                           const struct pipe_resource *tmpl,
 478                           struct winsys_handle *handle, unsigned usage)
 479 {
 480    struct etna_screen *screen = etna_screen(pscreen);
 481    struct etna_resource *rsc;
 482    struct etna_resource_level *level;
 483    struct pipe_resource *prsc;
 484    struct pipe_resource *ptiled = NULL;
 485
 486    DBG("target=%d, format=%s, %ux%ux%u, array_size=%u, last_level=%u, "
 487        "nr_samples=%u, usage=%u, bind=%x, flags=%x",
 488        tmpl->target, util_format_name(tmpl->format), tmpl->width0,
 489        tmpl->height0, tmpl->depth0, tmpl->array_size, tmpl->last_level,
 490        tmpl->nr_samples, tmpl->usage, tmpl->bind, tmpl->flags);
 491
 492    rsc = CALLOC_STRUCT(etna_resource);
 493    if (!rsc)
 494       return NULL;
 495
 496    level = &rsc->levels[0];
 497    prsc = &rsc->base;
 498
 499    *prsc = *tmpl;
 500
 501    pipe_reference_init(&prsc->reference, 1);
 502    list_inithead(&rsc->list);
 503    prsc->screen = pscreen;
 504
 505    rsc->bo = etna_screen_bo_from_handle(pscreen, handle, &level->stride);
 506    if (!rsc->bo)
 507       goto fail;
 508
 509    rsc->seqno = 1;
 510    rsc->layout = modifier_to_layout(handle->modifier);
 511    rsc->halign = TEXTURE_HALIGN_FOUR;
 512
 513
 514    level->width = tmpl->width0;
 515    level->height = tmpl->height0;
 516
 517    /* Determine padding of the imported resource. */
 518    unsigned paddingX = 0, paddingY = 0;
 519    etna_layout_multiple(rsc->layout, screen->specs.pixel_pipes,
 520                         VIV_FEATURE(screen, chipMinorFeatures1, TEXTURE_HALIGN),
 521                         &paddingX, &paddingY, &rsc->halign);
 522
 523    etna_adjust_rs_align(screen->specs.pixel_pipes, NULL, &paddingY);
 524    level->padded_width = align(level->width, paddingX);
 525    level->padded_height = align(level->height, paddingY);
 526
 527    level->layer_stride = level->stride * util_format_get_nblocksy(prsc->format,
 528                                                                   level->padded_height);
 529
 530    /* The DDX must give us a BO which conforms to our padding size.
 531     * The stride of the BO must be greater or equal to our padded
 532     * stride. The size of the BO must accomodate the padded height. */
 533    if (level->stride < util_format_get_stride(tmpl->format, level->padded_width)) {
 534       BUG("BO stride is too small for RS engine width padding");
 535       goto fail;
 536    }
 537    if (etna_bo_size(rsc->bo) < level->stride * level->padded_height) {
 538       BUG("BO size is too small for RS engine height padding");
 539       goto fail;
 540    }
 541
 542    if (rsc->layout == ETNA_LAYOUT_LINEAR) {
 543       /*
 544        * Both sampler and pixel pipes can't handle linear, create a compatible
 545        * base resource, where we can attach the imported buffer as an external
 546        * resource.
 547        */
 548       struct pipe_resource tiled_templat = *tmpl;
 549
 550       /*
 551        * Remove BIND_SCANOUT to avoid recursion, as etna_resource_create uses
 552        * this function to import the scanout buffer and get a tiled resource.
 553        */
 554       tiled_templat.bind &= ~PIPE_BIND_SCANOUT;
 555
 556       ptiled = etna_resource_create(pscreen, &tiled_templat);
 557       if (!ptiled)
 558          goto fail;
 559
 560       etna_resource(ptiled)->external = prsc;
 561
 562       return ptiled;
 563    }
 564
 565    return prsc;
 566
 567 fail:
 568    etna_resource_destroy(pscreen, prsc);
 569    if (ptiled)
 570       etna_resource_destroy(pscreen, ptiled);
 571
 572    return NULL;
 573 }
 574
 575 static boolean
 576 etna_resource_get_handle(struct pipe_screen *pscreen,
 577                          struct pipe_context *pctx,
 578                          struct pipe_resource *prsc,
 579                          struct winsys_handle *handle, unsigned usage)
 580 {
 581    struct etna_resource *rsc = etna_resource(prsc);
 582    /* Scanout is always attached to the base resource */
 583    struct renderonly_scanout *scanout = rsc->scanout;
 584
 585    /*
 586     * External resources are preferred, so a import->export chain of
 587     * render/sampler incompatible buffers yield the same handle.
 588     */
 589    if (rsc->external)
 590       rsc = etna_resource(rsc->external);
 591
 592    handle->stride = rsc->levels[0].stride;
 593    handle->modifier = layout_to_modifier(rsc->layout);
 594
 595    if (handle->type == DRM_API_HANDLE_TYPE_SHARED) {
 596       return etna_bo_get_name(rsc->bo, &handle->handle) == 0;
 597    } else if (handle->type == DRM_API_HANDLE_TYPE_KMS) {
 598       if (renderonly_get_handle(scanout, handle)) {
 599          return TRUE;
 600       } else {
 601          handle->handle = etna_bo_handle(rsc->bo);
 602          return TRUE;
 603       }
 604    } else if (handle->type == DRM_API_HANDLE_TYPE_FD) {
 605       handle->handle = etna_bo_dmabuf(rsc->bo);
 606       return TRUE;
 607    } else {
 608       return FALSE;
 609    }
 610 }
 611
 612 void
 613 etna_resource_used(struct etna_context *ctx, struct pipe_resource *prsc,
 614                    enum etna_resource_status status)
 615 {
 616    struct etna_resource *rsc;
 617
 618    if (!prsc)
 619       return;
 620
 621    rsc = etna_resource(prsc);
 622    rsc->status |= status;
 623
 624    /* TODO resources can actually be shared across contexts,
 625     * so I'm not sure a single list-head will do the trick? */
 626    debug_assert((rsc->pending_ctx == ctx) || !rsc->pending_ctx);
 627    list_delinit(&rsc->list);
 628    list_addtail(&rsc->list, &ctx->used_resources);
 629    rsc->pending_ctx = ctx;
 630 }
 631
 632 bool
 633 etna_resource_has_valid_ts(struct etna_resource *rsc)
 634 {
 635    if (!rsc->ts_bo)
 636       return false;
 637
 638    for (int level = 0; level <= rsc->base.last_level; level++)
 639       if (rsc->levels[level].ts_valid)
 640          return true;
 641
 642    return false;
 643 }
 644
 645 void
 646 etna_resource_screen_init(struct pipe_screen *pscreen)
 647 {
 648    pscreen->can_create_resource = etna_screen_can_create_resource;
 649    pscreen->resource_create = etna_resource_create;
 650    pscreen->resource_create_with_modifiers = etna_resource_create_modifiers;
 651    pscreen->resource_from_handle = etna_resource_from_handle;
 652    pscreen->resource_get_handle = etna_resource_get_handle;
 653    pscreen->resource_changed = etna_resource_changed;
 654    pscreen->resource_destroy = etna_resource_destroy;
 655 }