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 /* Is rs alignment needed? */
 180 static bool is_rs_align(struct etna_screen *screen,
 181                         const struct pipe_resource *tmpl)
 182 {
 183    return screen->specs.use_blt ? false : (
 184       VIV_FEATURE(screen, chipMinorFeatures1, TEXTURE_HALIGN) ||
 185       !etna_resource_sampler_only(tmpl));
 186 }
 187
 188 /* Create a new resource object, using the given template info */
 189 struct pipe_resource *
 190 etna_resource_alloc(struct pipe_screen *pscreen, unsigned layout,
 191                     uint64_t modifier, const struct pipe_resource *templat)
 192 {
 193    struct etna_screen *screen = etna_screen(pscreen);
 194    struct etna_resource *rsc;
 195    unsigned size;
 196
 197    DBG_F(ETNA_DBG_RESOURCE_MSGS,
 198          "target=%d, format=%s, %ux%ux%u, array_size=%u, "
 199          "last_level=%u, nr_samples=%u, usage=%u, bind=%x, flags=%x",
 200          templat->target, util_format_name(templat->format), templat->width0,
 201          templat->height0, templat->depth0, templat->array_size,
 202          templat->last_level, templat->nr_samples, templat->usage,
 203          templat->bind, templat->flags);
 204
 205    /* Determine scaling for antialiasing, allow override using debug flag */
 206    int nr_samples = templat->nr_samples;
 207    if ((templat->bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_DEPTH_STENCIL)) &&
 208        !(templat->bind & PIPE_BIND_SAMPLER_VIEW)) {
 209       if (DBG_ENABLED(ETNA_DBG_MSAA_2X))
 210          nr_samples = 2;
 211       if (DBG_ENABLED(ETNA_DBG_MSAA_4X))
 212          nr_samples = 4;
 213    }
 214
 215    int msaa_xscale = 1, msaa_yscale = 1;
 216    if (!translate_samples_to_xyscale(nr_samples, &msaa_xscale, &msaa_yscale, NULL)) {
 217       /* Number of samples not supported */
 218       return NULL;
 219    }
 220
 221    /* Determine needed padding (alignment of height/width) */
 222    unsigned paddingX = 0, paddingY = 0;
 223    unsigned halign = TEXTURE_HALIGN_FOUR;
 224    if (!util_format_is_compressed(templat->format)) {
 225       /* If we have the TEXTURE_HALIGN feature, we can always align to the
 226        * resolve engine's width.  If not, we must not align resources used
 227        * only for textures. If this GPU uses the BLT engine, never do RS align.
 228        */
 229       etna_layout_multiple(layout, screen->specs.pixel_pipes,
 230                            is_rs_align (screen, templat),
 231                            &paddingX, &paddingY, &halign);
 232       assert(paddingX && paddingY);
 233    } else {
 234       /* Compressed textures are padded to their block size, but we don't have
 235        * to do anything special for that. */
 236       paddingX = 1;
 237       paddingY = 1;
 238    }
 239
 240    if (!screen->specs.use_blt && templat->target != PIPE_BUFFER)
 241       etna_adjust_rs_align(screen->specs.pixel_pipes, NULL, &paddingY);
 242
 243    if (templat->bind & PIPE_BIND_SCANOUT) {
 244       struct pipe_resource scanout_templat = *templat;
 245       struct renderonly_scanout *scanout;
 246       struct winsys_handle handle;
 247
 248       /* pad scanout buffer size to be compatible with the RS */
 249       if (!screen->specs.use_blt && modifier == DRM_FORMAT_MOD_LINEAR)
 250          etna_adjust_rs_align(screen->specs.pixel_pipes, &paddingX, &paddingY);
 251
 252       scanout_templat.width0 = align(scanout_templat.width0, paddingX);
 253       scanout_templat.height0 = align(scanout_templat.height0, paddingY);
 254
 255       scanout = renderonly_scanout_for_resource(&scanout_templat,
 256                                                 screen->ro, &handle);
 257       if (!scanout)
 258          return NULL;
 259
 260       assert(handle.type == WINSYS_HANDLE_TYPE_FD);
 261       handle.modifier = modifier;
 262       rsc = etna_resource(pscreen->resource_from_handle(pscreen, templat,
 263                                                         &handle,
 264                                                         PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE));
 265       close(handle.handle);
 266       if (!rsc)
 267          return NULL;
 268
 269       rsc->scanout = scanout;
 270
 271       return &rsc->base;
 272    }
 273
 274    rsc = CALLOC_STRUCT(etna_resource);
 275    if (!rsc)
 276       return NULL;
 277
 278    rsc->base = *templat;
 279    rsc->base.screen = pscreen;
 280    rsc->base.nr_samples = nr_samples;
 281    rsc->layout = layout;
 282    rsc->halign = halign;
 283
 284    pipe_reference_init(&rsc->base.reference, 1);
 285    list_inithead(&rsc->list);
 286
 287    size = setup_miptree(rsc, paddingX, paddingY, msaa_xscale, msaa_yscale);
 288
 289    uint32_t flags = DRM_ETNA_GEM_CACHE_WC;
 290    if (templat->bind & PIPE_BIND_VERTEX_BUFFER)
 291       flags |= DRM_ETNA_GEM_FORCE_MMU;
 292    struct etna_bo *bo = etna_bo_new(screen->dev, size, flags);
 293    if (unlikely(bo == NULL)) {
 294       BUG("Problem allocating video memory for resource");
 295       goto free_rsc;
 296    }
 297
 298    rsc->bo = bo;
 299    rsc->ts_bo = 0; /* TS is only created when first bound to surface */
 300
 301    if (DBG_ENABLED(ETNA_DBG_ZERO)) {
 302       void *map = etna_bo_map(bo);
 303       memset(map, 0, size);
 304    }
 305
 306    return &rsc->base;
 307
 308 free_rsc:
 309    FREE(rsc);
 310    return NULL;
 311 }
 312
 313 static struct pipe_resource *
 314 etna_resource_create(struct pipe_screen *pscreen,
 315                      const struct pipe_resource *templat)
 316 {
 317    struct etna_screen *screen = etna_screen(pscreen);
 318
 319    /* Figure out what tiling to use -- for now, assume that texture cannot be linear.
 320     * there is a capability LINEAR_TEXTURE_SUPPORT (supported on gc880 and
 321     * gc2000 at least), but not sure how it works.
 322     * Buffers always have LINEAR layout.
 323     */
 324    unsigned layout = ETNA_LAYOUT_LINEAR;
 325    if (etna_resource_sampler_only(templat)) {
 326       /* The buffer is only used for texturing, so create something
 327        * directly compatible with the sampler.  Such a buffer can
 328        * never be rendered to. */
 329       layout = ETNA_LAYOUT_TILED;
 330
 331       if (util_format_is_compressed(templat->format))
 332          layout = ETNA_LAYOUT_LINEAR;
 333    } else if (templat->target != PIPE_BUFFER) {
 334       bool want_multitiled = false;
 335       bool want_supertiled = screen->specs.can_supertile;
 336
 337       /* When this GPU supports single-buffer rendering, don't ever enable
 338        * multi-tiling. This replicates the blob behavior on GC3000.
 339        */
 340       if (!screen->specs.single_buffer)
 341          want_multitiled = screen->specs.pixel_pipes > 1;
 342
 343       /* Keep single byte blocksized resources as tiled, since we
 344        * are unable to use the RS blit to de-tile them. However,
 345        * if they're used as a render target or depth/stencil, they
 346        * must be multi-tiled for GPUs with multiple pixel pipes.
 347        * Ignore depth/stencil here, but it is an error for a render
 348        * target.
 349        */
 350       if (util_format_get_blocksize(templat->format) == 1 &&
 351           !(templat->bind & PIPE_BIND_DEPTH_STENCIL)) {
 352          assert(!(templat->bind & PIPE_BIND_RENDER_TARGET && want_multitiled));
 353          want_multitiled = want_supertiled = false;
 354       }
 355
 356       layout = ETNA_LAYOUT_BIT_TILE;
 357       if (want_multitiled)
 358          layout |= ETNA_LAYOUT_BIT_MULTI;
 359       if (want_supertiled)
 360          layout |= ETNA_LAYOUT_BIT_SUPER;
 361    }
 362
 363    if (templat->target == PIPE_TEXTURE_3D)
 364       layout = ETNA_LAYOUT_LINEAR;
 365
 366    /* modifier is only used for scanout surfaces, so safe to use LINEAR here */
 367    return etna_resource_alloc(pscreen, layout, DRM_FORMAT_MOD_LINEAR, templat);
 368 }
 369
 370 enum modifier_priority {
 371    MODIFIER_PRIORITY_INVALID = 0,
 372    MODIFIER_PRIORITY_LINEAR,
 373    MODIFIER_PRIORITY_SPLIT_TILED,
 374    MODIFIER_PRIORITY_SPLIT_SUPER_TILED,
 375    MODIFIER_PRIORITY_TILED,
 376    MODIFIER_PRIORITY_SUPER_TILED,
 377 };
 378
 379 const uint64_t priority_to_modifier[] = {
 380    [MODIFIER_PRIORITY_INVALID] = DRM_FORMAT_MOD_INVALID,
 381    [MODIFIER_PRIORITY_LINEAR] = DRM_FORMAT_MOD_LINEAR,
 382    [MODIFIER_PRIORITY_SPLIT_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED,
 383    [MODIFIER_PRIORITY_SPLIT_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED,
 384    [MODIFIER_PRIORITY_TILED] = DRM_FORMAT_MOD_VIVANTE_TILED,
 385    [MODIFIER_PRIORITY_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SUPER_TILED,
 386 };
 387
 388 static uint64_t
 389 select_best_modifier(const struct etna_screen * screen,
 390                      const uint64_t *modifiers, const unsigned count)
 391 {
 392    enum modifier_priority prio = MODIFIER_PRIORITY_INVALID;
 393
 394    for (int i = 0; i < count; i++) {
 395       switch (modifiers[i]) {
 396       case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
 397          if ((screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer) ||
 398              !screen->specs.can_supertile)
 399             break;
 400          prio = MAX2(prio, MODIFIER_PRIORITY_SUPER_TILED);
 401          break;
 402       case DRM_FORMAT_MOD_VIVANTE_TILED:
 403          if (screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer)
 404             break;
 405          prio = MAX2(prio, MODIFIER_PRIORITY_TILED);
 406          break;
 407       case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
 408          if ((screen->specs.pixel_pipes < 2) || !screen->specs.can_supertile)
 409             break;
 410          prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_SUPER_TILED);
 411          break;
 412       case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
 413          if (screen->specs.pixel_pipes < 2)
 414             break;
 415          prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_TILED);
 416          break;
 417       case DRM_FORMAT_MOD_LINEAR:
 418          prio = MAX2(prio, MODIFIER_PRIORITY_LINEAR);
 419          break;
 420       case DRM_FORMAT_MOD_INVALID:
 421       default:
 422          break;
 423       }
 424    }
 425
 426    return priority_to_modifier[prio];
 427 }
 428
 429 static struct pipe_resource *
 430 etna_resource_create_modifiers(struct pipe_screen *pscreen,
 431                                const struct pipe_resource *templat,
 432                                const uint64_t *modifiers, int count)
 433 {
 434    struct etna_screen *screen = etna_screen(pscreen);
 435    struct pipe_resource tmpl = *templat;
 436    uint64_t modifier = select_best_modifier(screen, modifiers, count);
 437
 438    if (modifier == DRM_FORMAT_MOD_INVALID)
 439       return NULL;
 440
 441    /*
 442     * We currently assume that all buffers allocated through this interface
 443     * should be scanout enabled.
 444     */
 445    tmpl.bind |= PIPE_BIND_SCANOUT;
 446
 447    return etna_resource_alloc(pscreen, modifier_to_layout(modifier),
 448                               modifier, &tmpl);
 449 }
 450
 451 static void
 452 etna_resource_changed(struct pipe_screen *pscreen, struct pipe_resource *prsc)
 453 {
 454    struct etna_resource *res = etna_resource(prsc);
 455
 456    if (res->external)
 457       etna_resource(res->external)->seqno++;
 458    else
 459       res->seqno++;
 460 }
 461
 462 static void
 463 etna_resource_destroy(struct pipe_screen *pscreen, struct pipe_resource *prsc)
 464 {
 465    struct etna_resource *rsc = etna_resource(prsc);
 466
 467    if (rsc->bo)
 468       etna_bo_del(rsc->bo);
 469
 470    if (rsc->ts_bo)
 471       etna_bo_del(rsc->ts_bo);
 472
 473    if (rsc->scanout)
 474       renderonly_scanout_destroy(rsc->scanout, etna_screen(pscreen)->ro);
 475
 476    list_delinit(&rsc->list);
 477
 478    pipe_resource_reference(&rsc->texture, NULL);
 479    pipe_resource_reference(&rsc->external, NULL);
 480
 481    FREE(rsc);
 482 }
 483
 484 static struct pipe_resource *
 485 etna_resource_from_handle(struct pipe_screen *pscreen,
 486                           const struct pipe_resource *tmpl,
 487                           struct winsys_handle *handle, unsigned usage)
 488 {
 489    struct etna_screen *screen = etna_screen(pscreen);
 490    struct etna_resource *rsc;
 491    struct etna_resource_level *level;
 492    struct pipe_resource *prsc;
 493    struct pipe_resource *ptiled = NULL;
 494
 495    DBG("target=%d, format=%s, %ux%ux%u, array_size=%u, last_level=%u, "
 496        "nr_samples=%u, usage=%u, bind=%x, flags=%x",
 497        tmpl->target, util_format_name(tmpl->format), tmpl->width0,
 498        tmpl->height0, tmpl->depth0, tmpl->array_size, tmpl->last_level,
 499        tmpl->nr_samples, tmpl->usage, tmpl->bind, tmpl->flags);
 500
 501    rsc = CALLOC_STRUCT(etna_resource);
 502    if (!rsc)
 503       return NULL;
 504
 505    level = &rsc->levels[0];
 506    prsc = &rsc->base;
 507
 508    *prsc = *tmpl;
 509
 510    pipe_reference_init(&prsc->reference, 1);
 511    list_inithead(&rsc->list);
 512    prsc->screen = pscreen;
 513
 514    rsc->bo = etna_screen_bo_from_handle(pscreen, handle, &level->stride);
 515    if (!rsc->bo)
 516       goto fail;
 517
 518    rsc->seqno = 1;
 519    rsc->layout = modifier_to_layout(handle->modifier);
 520    rsc->halign = TEXTURE_HALIGN_FOUR;
 521
 522
 523    level->width = tmpl->width0;
 524    level->height = tmpl->height0;
 525
 526    /* Determine padding of the imported resource. */
 527    unsigned paddingX = 0, paddingY = 0;
 528    etna_layout_multiple(rsc->layout, screen->specs.pixel_pipes,
 529                         is_rs_align(screen, tmpl),
 530                         &paddingX, &paddingY, &rsc->halign);
 531
 532    if (!screen->specs.use_blt)
 533       etna_adjust_rs_align(screen->specs.pixel_pipes, NULL, &paddingY);
 534    level->padded_width = align(level->width, paddingX);
 535    level->padded_height = align(level->height, paddingY);
 536
 537    level->layer_stride = level->stride * util_format_get_nblocksy(prsc->format,
 538                                                                   level->padded_height);
 539    level->size = level->layer_stride;
 540
 541    /* The DDX must give us a BO which conforms to our padding size.
 542     * The stride of the BO must be greater or equal to our padded
 543     * stride. The size of the BO must accomodate the padded height. */
 544    if (level->stride < util_format_get_stride(tmpl->format, level->padded_width)) {
 545       BUG("BO stride %u is too small for RS engine width padding (%zu, format %s)",
 546           level->stride, util_format_get_stride(tmpl->format, level->padded_width),
 547           util_format_name(tmpl->format));
 548       goto fail;
 549    }
 550    if (etna_bo_size(rsc->bo) < level->stride * level->padded_height) {
 551       BUG("BO size %u is too small for RS engine height padding (%u, format %s)",
 552           etna_bo_size(rsc->bo), level->stride * level->padded_height,
 553           util_format_name(tmpl->format));
 554       goto fail;
 555    }
 556
 557    if (rsc->layout == ETNA_LAYOUT_LINEAR) {
 558       /*
 559        * Both sampler and pixel pipes can't handle linear, create a compatible
 560        * base resource, where we can attach the imported buffer as an external
 561        * resource.
 562        */
 563       struct pipe_resource tiled_templat = *tmpl;
 564
 565       /*
 566        * Remove BIND_SCANOUT to avoid recursion, as etna_resource_create uses
 567        * this function to import the scanout buffer and get a tiled resource.
 568        */
 569       tiled_templat.bind &= ~PIPE_BIND_SCANOUT;
 570
 571       ptiled = etna_resource_create(pscreen, &tiled_templat);
 572       if (!ptiled)
 573          goto fail;
 574
 575       etna_resource(ptiled)->external = prsc;
 576
 577       return ptiled;
 578    }
 579
 580    return prsc;
 581
 582 fail:
 583    etna_resource_destroy(pscreen, prsc);
 584    if (ptiled)
 585       etna_resource_destroy(pscreen, ptiled);
 586
 587    return NULL;
 588 }
 589
 590 static boolean
 591 etna_resource_get_handle(struct pipe_screen *pscreen,
 592                          struct pipe_context *pctx,
 593                          struct pipe_resource *prsc,
 594                          struct winsys_handle *handle, unsigned usage)
 595 {
 596    struct etna_resource *rsc = etna_resource(prsc);
 597    /* Scanout is always attached to the base resource */
 598    struct renderonly_scanout *scanout = rsc->scanout;
 599
 600    /*
 601     * External resources are preferred, so a import->export chain of
 602     * render/sampler incompatible buffers yield the same handle.
 603     */
 604    if (rsc->external)
 605       rsc = etna_resource(rsc->external);
 606
 607    handle->stride = rsc->levels[0].stride;
 608    handle->modifier = layout_to_modifier(rsc->layout);
 609
 610    if (handle->type == WINSYS_HANDLE_TYPE_SHARED) {
 611       return etna_bo_get_name(rsc->bo, &handle->handle) == 0;
 612    } else if (handle->type == WINSYS_HANDLE_TYPE_KMS) {
 613       if (renderonly_get_handle(scanout, handle)) {
 614          return TRUE;
 615       } else {
 616          handle->handle = etna_bo_handle(rsc->bo);
 617          return TRUE;
 618       }
 619    } else if (handle->type == WINSYS_HANDLE_TYPE_FD) {
 620       handle->handle = etna_bo_dmabuf(rsc->bo);
 621       return TRUE;
 622    } else {
 623       return FALSE;
 624    }
 625 }
 626
 627 void
 628 etna_resource_used(struct etna_context *ctx, struct pipe_resource *prsc,
 629                    enum etna_resource_status status)
 630 {
 631    struct etna_resource *rsc;
 632
 633    if (!prsc)
 634       return;
 635
 636    rsc = etna_resource(prsc);
 637    rsc->status |= status;
 638
 639    /* TODO resources can actually be shared across contexts,
 640     * so I'm not sure a single list-head will do the trick? */
 641    debug_assert((rsc->pending_ctx == ctx) || !rsc->pending_ctx);
 642    list_delinit(&rsc->list);
 643    list_addtail(&rsc->list, &ctx->used_resources);
 644    rsc->pending_ctx = ctx;
 645 }
 646
 647 bool
 648 etna_resource_has_valid_ts(struct etna_resource *rsc)
 649 {
 650    if (!rsc->ts_bo)
 651       return false;
 652
 653    for (int level = 0; level <= rsc->base.last_level; level++)
 654       if (rsc->levels[level].ts_valid)
 655          return true;
 656
 657    return false;
 658 }
 659
 660 void
 661 etna_resource_screen_init(struct pipe_screen *pscreen)
 662 {
 663    pscreen->can_create_resource = etna_screen_can_create_resource;
 664    pscreen->resource_create = etna_resource_create;
 665    pscreen->resource_create_with_modifiers = etna_resource_create_modifiers;
 666    pscreen->resource_from_handle = etna_resource_from_handle;
 667    pscreen->resource_get_handle = etna_resource_get_handle;
 668    pscreen->resource_changed = etna_resource_changed;
 669    pscreen->resource_destroy = etna_resource_destroy;
 670 }