src/gallium/winsys/virgl/vtest/virgl_vtest_winsys.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * 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 AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <stdio.h>
  24 #include "util/u_memory.h"
  25 #include "util/u_format.h"
  26 #include "util/u_inlines.h"
  27 #include "util/os_time.h"
  28 #include "state_tracker/sw_winsys.h"
  29
  30 #include "virgl_vtest_winsys.h"
  31 #include "virgl_vtest_public.h"
  32
  33 static void *virgl_vtest_resource_map(struct virgl_winsys *vws,
  34                                       struct virgl_hw_res *res);
  35 static void virgl_vtest_resource_unmap(struct virgl_winsys *vws,
  36                                        struct virgl_hw_res *res);
  37
  38 static inline boolean can_cache_resource(struct virgl_hw_res *res)
  39 {
  40    return res->cacheable == TRUE;
  41 }
  42
  43 static uint32_t vtest_get_transfer_size(struct virgl_hw_res *res,
  44                                         const struct pipe_box *box,
  45                                         uint32_t stride, uint32_t layer_stride,
  46                                         uint32_t level, uint32_t *valid_stride_p)
  47 {
  48    uint32_t valid_stride, valid_layer_stride;
  49
  50    valid_stride = util_format_get_stride(res->format, box->width);
  51    if (stride) {
  52       if (box->height > 1)
  53          valid_stride = stride;
  54    }
  55
  56    valid_layer_stride = util_format_get_2d_size(res->format, valid_stride,
  57                                                 box->height);
  58    if (layer_stride) {
  59       if (box->depth > 1)
  60          valid_layer_stride = layer_stride;
  61    }
  62
  63    *valid_stride_p = valid_stride;
  64    return valid_layer_stride * box->depth;
  65 }
  66
  67 static int
  68 virgl_vtest_transfer_put(struct virgl_winsys *vws,
  69                          struct virgl_hw_res *res,
  70                          const struct pipe_box *box,
  71                          uint32_t stride, uint32_t layer_stride,
  72                          uint32_t buf_offset, uint32_t level)
  73 {
  74    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
  75    uint32_t size;
  76    void *ptr;
  77    uint32_t valid_stride;
  78
  79    size = vtest_get_transfer_size(res, box, stride, layer_stride, level,
  80                                   &valid_stride);
  81
  82    /* The size calculated above is the full box size, but if this box origin
  83     * is not zero we may have to correct the transfer size to not read past the
  84     * end of the resource. The correct adjustment depends on various factors
  85     * that are not documented, so instead of going though all the hops to get
  86     * the size right up-front, we just make sure we don't read past the end.
  87     * FIXME: figure out what it takes to actually get this right.
  88     */
  89    if (size + buf_offset > res->size)
  90       size = res->size - buf_offset;
  91
  92    virgl_vtest_send_transfer_put(vtws, res->res_handle,
  93                                  level, stride, layer_stride,
  94                                  box, size, buf_offset);
  95    ptr = virgl_vtest_resource_map(vws, res);
  96    virgl_vtest_send_transfer_put_data(vtws, ptr + buf_offset, size);
  97    virgl_vtest_resource_unmap(vws, res);
  98    return 0;
  99 }
 100
 101 static int
 102 virgl_vtest_transfer_get(struct virgl_winsys *vws,
 103                          struct virgl_hw_res *res,
 104                          const struct pipe_box *box,
 105                          uint32_t stride, uint32_t layer_stride,
 106                          uint32_t buf_offset, uint32_t level)
 107 {
 108    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 109    uint32_t size;
 110    void *ptr;
 111    uint32_t valid_stride;
 112
 113    size = vtest_get_transfer_size(res, box, stride, layer_stride, level,
 114                                   &valid_stride);
 115    /* Don't ask for more pixels than available (see above) */
 116    if (size + buf_offset > res->size)
 117       size = res->size - buf_offset;
 118
 119    virgl_vtest_send_transfer_get(vtws, res->res_handle,
 120                                  level, stride, layer_stride,
 121                                  box, size, buf_offset);
 122
 123    ptr = virgl_vtest_resource_map(vws, res);
 124
 125    /* This functions seems to be using a specific transfer resource that
 126     * has exactly the box size and hence its src stride is equal to the target
 127     * stride */
 128    virgl_vtest_recv_transfer_get_data(vtws, ptr + buf_offset, size,
 129                                       valid_stride, box, res->format, valid_stride);
 130
 131    virgl_vtest_resource_unmap(vws, res);
 132    return 0;
 133 }
 134
 135 static void virgl_hw_res_destroy(struct virgl_vtest_winsys *vtws,
 136                                  struct virgl_hw_res *res)
 137 {
 138    virgl_vtest_send_resource_unref(vtws, res->res_handle);
 139    if (res->dt)
 140       vtws->sws->displaytarget_destroy(vtws->sws, res->dt);
 141    free(res->ptr);
 142    FREE(res);
 143 }
 144
 145 static boolean virgl_vtest_resource_is_busy(struct virgl_vtest_winsys *vtws,
 146                                             struct virgl_hw_res *res)
 147 {
 148    /* implement busy check */
 149    int ret;
 150    ret = virgl_vtest_busy_wait(vtws, res->res_handle, 0);
 151
 152    if (ret < 0)
 153       return FALSE;
 154
 155    return ret == 1 ? TRUE : FALSE;
 156 }
 157
 158 static void
 159 virgl_cache_flush(struct virgl_vtest_winsys *vtws)
 160 {
 161    struct list_head *curr, *next;
 162    struct virgl_hw_res *res;
 163
 164    mtx_lock(&vtws->mutex);
 165    curr = vtws->delayed.next;
 166    next = curr->next;
 167
 168    while (curr != &vtws->delayed) {
 169       res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 170       LIST_DEL(&res->head);
 171       virgl_hw_res_destroy(vtws, res);
 172       curr = next;
 173       next = curr->next;
 174    }
 175    mtx_unlock(&vtws->mutex);
 176 }
 177
 178 static void
 179 virgl_cache_list_check_free(struct virgl_vtest_winsys *vtws)
 180 {
 181    struct list_head *curr, *next;
 182    struct virgl_hw_res *res;
 183    int64_t now;
 184
 185    now = os_time_get();
 186    curr = vtws->delayed.next;
 187    next = curr->next;
 188    while (curr != &vtws->delayed) {
 189       res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 190       if (!os_time_timeout(res->start, res->end, now))
 191          break;
 192
 193       LIST_DEL(&res->head);
 194       virgl_hw_res_destroy(vtws, res);
 195       curr = next;
 196       next = curr->next;
 197    }
 198 }
 199
 200 static void virgl_vtest_resource_reference(struct virgl_vtest_winsys *vtws,
 201                                            struct virgl_hw_res **dres,
 202                                            struct virgl_hw_res *sres)
 203 {
 204    struct virgl_hw_res *old = *dres;
 205    if (pipe_reference(&(*dres)->reference, &sres->reference)) {
 206       if (!can_cache_resource(old)) {
 207          virgl_hw_res_destroy(vtws, old);
 208       } else {
 209          mtx_lock(&vtws->mutex);
 210          virgl_cache_list_check_free(vtws);
 211
 212          old->start = os_time_get();
 213          old->end = old->start + vtws->usecs;
 214          LIST_ADDTAIL(&old->head, &vtws->delayed);
 215          vtws->num_delayed++;
 216          mtx_unlock(&vtws->mutex);
 217       }
 218    }
 219    *dres = sres;
 220 }
 221
 222 static struct virgl_hw_res *
 223 virgl_vtest_winsys_resource_create(struct virgl_winsys *vws,
 224                                    enum pipe_texture_target target,
 225                                    uint32_t format,
 226                                    uint32_t bind,
 227                                    uint32_t width,
 228                                    uint32_t height,
 229                                    uint32_t depth,
 230                                    uint32_t array_size,
 231                                    uint32_t last_level,
 232                                    uint32_t nr_samples,
 233                                    uint32_t size)
 234 {
 235    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 236    struct virgl_hw_res *res;
 237    static int handle = 1;
 238
 239    res = CALLOC_STRUCT(virgl_hw_res);
 240    if (!res)
 241       return NULL;
 242
 243    if (bind & (VIRGL_BIND_DISPLAY_TARGET | VIRGL_BIND_SCANOUT)) {
 244       res->dt = vtws->sws->displaytarget_create(vtws->sws, bind, format,
 245                                                 width, height, 64, NULL,
 246                                                 &res->stride);
 247
 248    } else {
 249       res->ptr = align_malloc(size, 64);
 250       if (!res->ptr) {
 251          FREE(res);
 252          return NULL;
 253       }
 254    }
 255
 256    res->bind = bind;
 257    res->format = format;
 258    res->height = height;
 259    res->width = width;
 260    res->size = size;
 261    virgl_vtest_send_resource_create(vtws, handle, target, format, bind,
 262                                     width, height, depth, array_size,
 263                                     last_level, nr_samples, size);
 264
 265    res->res_handle = handle++;
 266    pipe_reference_init(&res->reference, 1);
 267    return res;
 268 }
 269
 270 static void virgl_vtest_winsys_resource_unref(struct virgl_winsys *vws,
 271                                               struct virgl_hw_res *hres)
 272 {
 273    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 274    virgl_vtest_resource_reference(vtws, &hres, NULL);
 275 }
 276
 277 static void *virgl_vtest_resource_map(struct virgl_winsys *vws,
 278                                       struct virgl_hw_res *res)
 279 {
 280    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 281
 282    if (res->dt) {
 283       return vtws->sws->displaytarget_map(vtws->sws, res->dt, 0);
 284    } else {
 285       res->mapped = res->ptr;
 286       return res->mapped;
 287    }
 288 }
 289
 290 static void virgl_vtest_resource_unmap(struct virgl_winsys *vws,
 291                                        struct virgl_hw_res *res)
 292 {
 293    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 294    if (res->mapped)
 295       res->mapped = NULL;
 296
 297    if (res->dt)
 298       vtws->sws->displaytarget_unmap(vtws->sws, res->dt);
 299 }
 300
 301 static void virgl_vtest_resource_wait(struct virgl_winsys *vws,
 302                                       struct virgl_hw_res *res)
 303 {
 304    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 305
 306    virgl_vtest_busy_wait(vtws, res->res_handle, VCMD_BUSY_WAIT_FLAG_WAIT);
 307 }
 308
 309 static inline int virgl_is_res_compat(struct virgl_vtest_winsys *vtws,
 310                                       struct virgl_hw_res *res,
 311                                       uint32_t size, uint32_t bind,
 312                                       uint32_t format)
 313 {
 314    if (res->bind != bind)
 315       return 0;
 316    if (res->format != format)
 317       return 0;
 318    if (res->size < size)
 319       return 0;
 320    if (res->size > size * 2)
 321       return 0;
 322
 323    if (virgl_vtest_resource_is_busy(vtws, res)) {
 324       return -1;
 325    }
 326
 327    return 1;
 328 }
 329
 330 static struct virgl_hw_res *
 331 virgl_vtest_winsys_resource_cache_create(struct virgl_winsys *vws,
 332                                          enum pipe_texture_target target,
 333                                          uint32_t format,
 334                                          uint32_t bind,
 335                                          uint32_t width,
 336                                          uint32_t height,
 337                                          uint32_t depth,
 338                                          uint32_t array_size,
 339                                          uint32_t last_level,
 340                                          uint32_t nr_samples,
 341                                          uint32_t size)
 342 {
 343    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 344    struct virgl_hw_res *res, *curr_res;
 345    struct list_head *curr, *next;
 346    int64_t now;
 347    int ret;
 348
 349    /* only store binds for vertex/index/const buffers */
 350    if (bind != VIRGL_BIND_CONSTANT_BUFFER && bind != VIRGL_BIND_INDEX_BUFFER &&
 351        bind != VIRGL_BIND_VERTEX_BUFFER && bind != VIRGL_BIND_CUSTOM)
 352       goto alloc;
 353
 354    mtx_lock(&vtws->mutex);
 355
 356    res = NULL;
 357    curr = vtws->delayed.next;
 358    next = curr->next;
 359
 360    now = os_time_get();
 361    while (curr != &vtws->delayed) {
 362       curr_res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 363
 364       if (!res && ((ret = virgl_is_res_compat(vtws, curr_res, size, bind, format)) > 0))
 365          res = curr_res;
 366       else if (os_time_timeout(curr_res->start, curr_res->end, now)) {
 367          LIST_DEL(&curr_res->head);
 368          virgl_hw_res_destroy(vtws, curr_res);
 369       } else
 370          break;
 371
 372       if (ret == -1)
 373          break;
 374
 375       curr = next;
 376       next = curr->next;
 377    }
 378
 379    if (!res && ret != -1) {
 380       while (curr != &vtws->delayed) {
 381          curr_res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 382          ret = virgl_is_res_compat(vtws, curr_res, size, bind, format);
 383          if (ret > 0) {
 384             res = curr_res;
 385             break;
 386          }
 387          if (ret == -1)
 388             break;
 389          curr = next;
 390          next = curr->next;
 391       }
 392    }
 393
 394    if (res) {
 395       LIST_DEL(&res->head);
 396       --vtws->num_delayed;
 397       mtx_unlock(&vtws->mutex);
 398       pipe_reference_init(&res->reference, 1);
 399       return res;
 400    }
 401
 402    mtx_unlock(&vtws->mutex);
 403
 404 alloc:
 405    res = virgl_vtest_winsys_resource_create(vws, target, format, bind,
 406                                             width, height, depth, array_size,
 407                                             last_level, nr_samples, size);
 408    if (bind == VIRGL_BIND_CONSTANT_BUFFER || bind == VIRGL_BIND_INDEX_BUFFER ||
 409        bind == VIRGL_BIND_VERTEX_BUFFER)
 410       res->cacheable = TRUE;
 411    return res;
 412 }
 413
 414 static struct virgl_cmd_buf *virgl_vtest_cmd_buf_create(struct virgl_winsys *vws)
 415 {
 416    struct virgl_vtest_cmd_buf *cbuf;
 417
 418    cbuf = CALLOC_STRUCT(virgl_vtest_cmd_buf);
 419    if (!cbuf)
 420       return NULL;
 421
 422    cbuf->nres = 512;
 423    cbuf->res_bo = CALLOC(cbuf->nres, sizeof(struct virgl_hw_buf*));
 424    if (!cbuf->res_bo) {
 425       FREE(cbuf);
 426       return NULL;
 427    }
 428    cbuf->ws = vws;
 429    cbuf->base.buf = cbuf->buf;
 430    return &cbuf->base;
 431 }
 432
 433 static void virgl_vtest_cmd_buf_destroy(struct virgl_cmd_buf *_cbuf)
 434 {
 435    struct virgl_vtest_cmd_buf *cbuf = virgl_vtest_cmd_buf(_cbuf);
 436
 437    FREE(cbuf->res_bo);
 438    FREE(cbuf);
 439 }
 440
 441 static boolean virgl_vtest_lookup_res(struct virgl_vtest_cmd_buf *cbuf,
 442                                       struct virgl_hw_res *res)
 443 {
 444    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
 445    int i;
 446
 447    if (cbuf->is_handle_added[hash]) {
 448       i = cbuf->reloc_indices_hashlist[hash];
 449       if (cbuf->res_bo[i] == res)
 450          return true;
 451
 452       for (i = 0; i < cbuf->cres; i++) {
 453          if (cbuf->res_bo[i] == res) {
 454             cbuf->reloc_indices_hashlist[hash] = i;
 455             return true;
 456          }
 457       }
 458    }
 459    return false;
 460 }
 461
 462 static void virgl_vtest_release_all_res(struct virgl_vtest_winsys *vtws,
 463                                         struct virgl_vtest_cmd_buf *cbuf)
 464 {
 465    int i;
 466
 467    for (i = 0; i < cbuf->cres; i++) {
 468       p_atomic_dec(&cbuf->res_bo[i]->num_cs_references);
 469       virgl_vtest_resource_reference(vtws, &cbuf->res_bo[i], NULL);
 470    }
 471    cbuf->cres = 0;
 472 }
 473
 474 static void virgl_vtest_add_res(struct virgl_vtest_winsys *vtws,
 475                                 struct virgl_vtest_cmd_buf *cbuf,
 476                                 struct virgl_hw_res *res)
 477 {
 478    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
 479
 480    if (cbuf->cres >= cbuf->nres) {
 481       unsigned new_nres = cbuf->nres + 256;
 482       struct virgl_hw_res **new_re_bo = REALLOC(cbuf->res_bo,
 483                                                 cbuf->nres * sizeof(struct virgl_hw_buf*),
 484                                                 new_nres * sizeof(struct virgl_hw_buf*));
 485       if (!new_re_bo) {
 486           fprintf(stderr,"failure to add relocation %d, %d\n", cbuf->cres, cbuf->nres);
 487           return;
 488       }
 489
 490       cbuf->res_bo = new_re_bo;
 491       cbuf->nres = new_nres;
 492    }
 493
 494    cbuf->res_bo[cbuf->cres] = NULL;
 495    virgl_vtest_resource_reference(vtws, &cbuf->res_bo[cbuf->cres], res);
 496    cbuf->is_handle_added[hash] = TRUE;
 497
 498    cbuf->reloc_indices_hashlist[hash] = cbuf->cres;
 499    p_atomic_inc(&res->num_cs_references);
 500    cbuf->cres++;
 501 }
 502
 503 static int virgl_vtest_winsys_submit_cmd(struct virgl_winsys *vws,
 504                                          struct virgl_cmd_buf *_cbuf,
 505                                          int in_fence_fd, int *out_fence_fd)
 506 {
 507    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 508    struct virgl_vtest_cmd_buf *cbuf = virgl_vtest_cmd_buf(_cbuf);
 509    int ret;
 510
 511    if (cbuf->base.cdw == 0)
 512       return 0;
 513
 514    assert(in_fence_fd == -1);
 515    assert(out_fence_fd == NULL);
 516
 517    ret = virgl_vtest_submit_cmd(vtws, cbuf);
 518
 519    virgl_vtest_release_all_res(vtws, cbuf);
 520    memset(cbuf->is_handle_added, 0, sizeof(cbuf->is_handle_added));
 521    cbuf->base.cdw = 0;
 522    return ret;
 523 }
 524
 525 static void virgl_vtest_emit_res(struct virgl_winsys *vws,
 526                                  struct virgl_cmd_buf *_cbuf,
 527                                  struct virgl_hw_res *res, boolean write_buf)
 528 {
 529    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 530    struct virgl_vtest_cmd_buf *cbuf = virgl_vtest_cmd_buf(_cbuf);
 531    boolean already_in_list = virgl_vtest_lookup_res(cbuf, res);
 532
 533    if (write_buf)
 534       cbuf->base.buf[cbuf->base.cdw++] = res->res_handle;
 535    if (!already_in_list)
 536       virgl_vtest_add_res(vtws, cbuf, res);
 537 }
 538
 539 static boolean virgl_vtest_res_is_ref(struct virgl_winsys *vws,
 540                                       struct virgl_cmd_buf *_cbuf,
 541                                       struct virgl_hw_res *res)
 542 {
 543    if (!res->num_cs_references)
 544       return FALSE;
 545
 546    return TRUE;
 547 }
 548
 549 static int virgl_vtest_get_caps(struct virgl_winsys *vws,
 550                                 struct virgl_drm_caps *caps)
 551 {
 552    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 553
 554    virgl_ws_fill_new_caps_defaults(caps);
 555    return virgl_vtest_send_get_caps(vtws, caps);
 556 }
 557
 558 static struct pipe_fence_handle *
 559 virgl_cs_create_fence(struct virgl_winsys *vws, int fd)
 560 {
 561    struct virgl_hw_res *res;
 562
 563    res = virgl_vtest_winsys_resource_cache_create(vws,
 564                                                 PIPE_BUFFER,
 565                                                 PIPE_FORMAT_R8_UNORM,
 566                                                 VIRGL_BIND_CUSTOM,
 567                                                 8, 1, 1, 0, 0, 0, 8);
 568
 569    return (struct pipe_fence_handle *)res;
 570 }
 571
 572 static bool virgl_fence_wait(struct virgl_winsys *vws,
 573                              struct pipe_fence_handle *fence,
 574                              uint64_t timeout)
 575 {
 576    struct virgl_vtest_winsys *vdws = virgl_vtest_winsys(vws);
 577    struct virgl_hw_res *res = virgl_hw_res(fence);
 578
 579    if (timeout == 0)
 580       return !virgl_vtest_resource_is_busy(vdws, res);
 581
 582    if (timeout != PIPE_TIMEOUT_INFINITE) {
 583       int64_t start_time = os_time_get();
 584       timeout /= 1000;
 585       while (virgl_vtest_resource_is_busy(vdws, res)) {
 586          if (os_time_get() - start_time >= timeout)
 587             return FALSE;
 588          os_time_sleep(10);
 589       }
 590       return TRUE;
 591    }
 592    virgl_vtest_resource_wait(vws, res);
 593    return TRUE;
 594 }
 595
 596 static void virgl_fence_reference(struct virgl_winsys *vws,
 597                                   struct pipe_fence_handle **dst,
 598                                   struct pipe_fence_handle *src)
 599 {
 600    struct virgl_vtest_winsys *vdws = virgl_vtest_winsys(vws);
 601    virgl_vtest_resource_reference(vdws, (struct virgl_hw_res **)dst,
 602                                   virgl_hw_res(src));
 603 }
 604
 605 static void virgl_vtest_flush_frontbuffer(struct virgl_winsys *vws,
 606                                           struct virgl_hw_res *res,
 607                                           unsigned level, unsigned layer,
 608                                           void *winsys_drawable_handle,
 609                                           struct pipe_box *sub_box)
 610 {
 611    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 612    struct pipe_box box;
 613    void *map;
 614    uint32_t size;
 615    uint32_t offset = 0, valid_stride;
 616    if (!res->dt)
 617       return;
 618
 619    memset(&box, 0, sizeof(box));
 620
 621    if (sub_box) {
 622       box = *sub_box;
 623       offset = box.y / util_format_get_blockheight(res->format) * res->stride +
 624                box.x / util_format_get_blockwidth(res->format) * util_format_get_blocksize(res->format);
 625    } else {
 626       box.z = layer;
 627       box.width = res->width;
 628       box.height = res->height;
 629       box.depth = 1;
 630    }
 631
 632    size = vtest_get_transfer_size(res, &box, res->stride, 0, level, &valid_stride);
 633
 634    virgl_vtest_busy_wait(vtws, res->res_handle, VCMD_BUSY_WAIT_FLAG_WAIT);
 635    map = vtws->sws->displaytarget_map(vtws->sws, res->dt, 0);
 636
 637    /* execute a transfer */
 638    virgl_vtest_send_transfer_get(vtws, res->res_handle,
 639                                  level, res->stride, 0, &box, size, offset);
 640
 641    /* This functions gets the resource from the hardware backend that may have
 642     * a hardware imposed stride that is different from the IOV stride used to
 643     * get the data. */
 644    virgl_vtest_recv_transfer_get_data(vtws, map + offset, size, valid_stride,
 645                                       &box, res->format,
 646                                       util_format_get_stride(res->format, res->width));
 647
 648    vtws->sws->displaytarget_unmap(vtws->sws, res->dt);
 649
 650    vtws->sws->displaytarget_display(vtws->sws, res->dt, winsys_drawable_handle,
 651                                     sub_box);
 652 }
 653
 654 static void
 655 virgl_vtest_winsys_destroy(struct virgl_winsys *vws)
 656 {
 657    struct virgl_vtest_winsys *vtws = virgl_vtest_winsys(vws);
 658
 659    virgl_cache_flush(vtws);
 660
 661    mtx_destroy(&vtws->mutex);
 662    FREE(vtws);
 663 }
 664
 665 struct virgl_winsys *
 666 virgl_vtest_winsys_wrap(struct sw_winsys *sws)
 667 {
 668    struct virgl_vtest_winsys *vtws;
 669
 670    vtws = CALLOC_STRUCT(virgl_vtest_winsys);
 671    if (!vtws)
 672       return NULL;
 673
 674    virgl_vtest_connect(vtws);
 675    vtws->sws = sws;
 676
 677    vtws->usecs = 1000000;
 678    LIST_INITHEAD(&vtws->delayed);
 679    (void) mtx_init(&vtws->mutex, mtx_plain);
 680
 681    vtws->base.destroy = virgl_vtest_winsys_destroy;
 682
 683    vtws->base.transfer_put = virgl_vtest_transfer_put;
 684    vtws->base.transfer_get = virgl_vtest_transfer_get;
 685
 686    vtws->base.resource_create = virgl_vtest_winsys_resource_cache_create;
 687    vtws->base.resource_unref = virgl_vtest_winsys_resource_unref;
 688    vtws->base.resource_map = virgl_vtest_resource_map;
 689    vtws->base.resource_wait = virgl_vtest_resource_wait;
 690    vtws->base.cmd_buf_create = virgl_vtest_cmd_buf_create;
 691    vtws->base.cmd_buf_destroy = virgl_vtest_cmd_buf_destroy;
 692    vtws->base.submit_cmd = virgl_vtest_winsys_submit_cmd;
 693
 694    vtws->base.emit_res = virgl_vtest_emit_res;
 695    vtws->base.res_is_referenced = virgl_vtest_res_is_ref;
 696    vtws->base.get_caps = virgl_vtest_get_caps;
 697
 698    vtws->base.cs_create_fence = virgl_cs_create_fence;
 699    vtws->base.fence_wait = virgl_fence_wait;
 700    vtws->base.fence_reference = virgl_fence_reference;
 701    vtws->base.supports_fences =  0;
 702
 703    vtws->base.flush_frontbuffer = virgl_vtest_flush_frontbuffer;
 704
 705    return &vtws->base;
 706 }