src/gallium/winsys/virgl/drm/virgl_drm_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
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <stdio.h>
  27 #include <sys/ioctl.h>
  28 #include <sys/stat.h>
  29
  30 #include "os/os_mman.h"
  31 #include "os/os_time.h"
  32 #include "util/u_memory.h"
  33 #include "util/u_format.h"
  34 #include "util/u_hash_table.h"
  35 #include "util/u_inlines.h"
  36 #include "state_tracker/drm_driver.h"
  37 #include "virgl/virgl_screen.h"
  38 #include "virgl/virgl_public.h"
  39
  40 #include <xf86drm.h>
  41 #include "virtgpu_drm.h"
  42
  43 #include "virgl_drm_winsys.h"
  44 #include "virgl_drm_public.h"
  45
  46 static inline boolean can_cache_resource(struct virgl_hw_res *res)
  47 {
  48    return res->cacheable == TRUE;
  49 }
  50
  51 static void virgl_hw_res_destroy(struct virgl_drm_winsys *qdws,
  52                                  struct virgl_hw_res *res)
  53 {
  54       struct drm_gem_close args;
  55
  56       if (res->flinked) {
  57          pipe_mutex_lock(qdws->bo_handles_mutex);
  58          util_hash_table_remove(qdws->bo_names,
  59                                 (void *)(uintptr_t)res->flink);
  60          pipe_mutex_unlock(qdws->bo_handles_mutex);
  61       }
  62
  63       if (res->bo_handle) {
  64          pipe_mutex_lock(qdws->bo_handles_mutex);
  65          util_hash_table_remove(qdws->bo_handles,
  66                                 (void *)(uintptr_t)res->bo_handle);
  67          pipe_mutex_unlock(qdws->bo_handles_mutex);
  68       }
  69
  70       if (res->ptr)
  71          os_munmap(res->ptr, res->size);
  72
  73       memset(&args, 0, sizeof(args));
  74       args.handle = res->bo_handle;
  75       drmIoctl(qdws->fd, DRM_IOCTL_GEM_CLOSE, &args);
  76       FREE(res);
  77 }
  78
  79 static boolean virgl_drm_resource_is_busy(struct virgl_drm_winsys *qdws,
  80                                           struct virgl_hw_res *res)
  81 {
  82    struct drm_virtgpu_3d_wait waitcmd;
  83    int ret;
  84
  85    memset(&waitcmd, 0, sizeof(waitcmd));
  86    waitcmd.handle = res->bo_handle;
  87    waitcmd.flags = VIRTGPU_WAIT_NOWAIT;
  88
  89    ret = drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_WAIT, &waitcmd);
  90    if (ret && errno == EBUSY)
  91       return TRUE;
  92    return FALSE;
  93 }
  94
  95 static void
  96 virgl_cache_flush(struct virgl_drm_winsys *qdws)
  97 {
  98    struct list_head *curr, *next;
  99    struct virgl_hw_res *res;
 100
 101    pipe_mutex_lock(qdws->mutex);
 102    curr = qdws->delayed.next;
 103    next = curr->next;
 104
 105    while (curr != &qdws->delayed) {
 106       res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 107       LIST_DEL(&res->head);
 108       virgl_hw_res_destroy(qdws, res);
 109       curr = next;
 110       next = curr->next;
 111    }
 112    pipe_mutex_unlock(qdws->mutex);
 113 }
 114 static void
 115 virgl_drm_winsys_destroy(struct virgl_winsys *qws)
 116 {
 117    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 118
 119    virgl_cache_flush(qdws);
 120
 121    util_hash_table_destroy(qdws->bo_handles);
 122    util_hash_table_destroy(qdws->bo_names);
 123    pipe_mutex_destroy(qdws->bo_handles_mutex);
 124    pipe_mutex_destroy(qdws->mutex);
 125
 126    FREE(qdws);
 127 }
 128
 129 static void
 130 virgl_cache_list_check_free(struct virgl_drm_winsys *qdws)
 131 {
 132    struct list_head *curr, *next;
 133    struct virgl_hw_res *res;
 134    int64_t now;
 135
 136    now = os_time_get();
 137    curr = qdws->delayed.next;
 138    next = curr->next;
 139    while (curr != &qdws->delayed) {
 140       res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 141       if (!os_time_timeout(res->start, res->end, now))
 142          break;
 143
 144       LIST_DEL(&res->head);
 145       virgl_hw_res_destroy(qdws, res);
 146       curr = next;
 147       next = curr->next;
 148    }
 149 }
 150
 151 static void virgl_drm_resource_reference(struct virgl_drm_winsys *qdws,
 152                                        struct virgl_hw_res **dres,
 153                                        struct virgl_hw_res *sres)
 154 {
 155    struct virgl_hw_res *old = *dres;
 156    if (pipe_reference(&(*dres)->reference, &sres->reference)) {
 157
 158       if (!can_cache_resource(old)) {
 159          virgl_hw_res_destroy(qdws, old);
 160       } else {
 161          pipe_mutex_lock(qdws->mutex);
 162          virgl_cache_list_check_free(qdws);
 163
 164          old->start = os_time_get();
 165          old->end = old->start + qdws->usecs;
 166          LIST_ADDTAIL(&old->head, &qdws->delayed);
 167          qdws->num_delayed++;
 168          pipe_mutex_unlock(qdws->mutex);
 169       }
 170    }
 171    *dres = sres;
 172 }
 173
 174 static struct virgl_hw_res *
 175 virgl_drm_winsys_resource_create(struct virgl_winsys *qws,
 176                                  enum pipe_texture_target target,
 177                                  uint32_t format,
 178                                  uint32_t bind,
 179                                  uint32_t width,
 180                                  uint32_t height,
 181                                  uint32_t depth,
 182                                  uint32_t array_size,
 183                                  uint32_t last_level,
 184                                  uint32_t nr_samples,
 185                                  uint32_t size)
 186 {
 187    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 188    struct drm_virtgpu_resource_create createcmd;
 189    int ret;
 190    struct virgl_hw_res *res;
 191    uint32_t stride = width * util_format_get_blocksize(format);
 192
 193    res = CALLOC_STRUCT(virgl_hw_res);
 194    if (!res)
 195       return NULL;
 196
 197    memset(&createcmd, 0, sizeof(createcmd));
 198    createcmd.target = target;
 199    createcmd.format = format;
 200    createcmd.bind = bind;
 201    createcmd.width = width;
 202    createcmd.height = height;
 203    createcmd.depth = depth;
 204    createcmd.array_size = array_size;
 205    createcmd.last_level = last_level;
 206    createcmd.nr_samples = nr_samples;
 207    createcmd.stride = stride;
 208    createcmd.size = size;
 209
 210    ret = drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_RESOURCE_CREATE, &createcmd);
 211    if (ret != 0) {
 212       FREE(res);
 213       return NULL;
 214    }
 215
 216    res->bind = bind;
 217    res->format = format;
 218
 219    res->res_handle = createcmd.res_handle;
 220    res->bo_handle = createcmd.bo_handle;
 221    res->size = size;
 222    res->stride = stride;
 223    pipe_reference_init(&res->reference, 1);
 224    res->num_cs_references = 0;
 225    return res;
 226 }
 227
 228 static inline int virgl_is_res_compat(struct virgl_drm_winsys *qdws,
 229                                       struct virgl_hw_res *res,
 230                                       uint32_t size, uint32_t bind,
 231                                       uint32_t format)
 232 {
 233    if (res->bind != bind)
 234       return 0;
 235    if (res->format != format)
 236       return 0;
 237    if (res->size < size)
 238       return 0;
 239    if (res->size > size * 2)
 240       return 0;
 241
 242    if (virgl_drm_resource_is_busy(qdws, res)) {
 243       return -1;
 244    }
 245
 246    return 1;
 247 }
 248
 249 static int
 250 virgl_bo_transfer_put(struct virgl_winsys *vws,
 251                       struct virgl_hw_res *res,
 252                       const struct pipe_box *box,
 253                       uint32_t stride, uint32_t layer_stride,
 254                       uint32_t buf_offset, uint32_t level)
 255 {
 256    struct virgl_drm_winsys *vdws = virgl_drm_winsys(vws);
 257    struct drm_virtgpu_3d_transfer_to_host tohostcmd;
 258
 259    memset(&tohostcmd, 0, sizeof(tohostcmd));
 260    tohostcmd.bo_handle = res->bo_handle;
 261    tohostcmd.box = *(struct drm_virtgpu_3d_box *)box;
 262    tohostcmd.offset = buf_offset;
 263    tohostcmd.level = level;
 264   // tohostcmd.stride = stride;
 265   // tohostcmd.layer_stride = stride;
 266    return drmIoctl(vdws->fd, DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST, &tohostcmd);
 267 }
 268
 269 static int
 270 virgl_bo_transfer_get(struct virgl_winsys *vws,
 271                       struct virgl_hw_res *res,
 272                       const struct pipe_box *box,
 273                       uint32_t stride, uint32_t layer_stride,
 274                       uint32_t buf_offset, uint32_t level)
 275 {
 276    struct virgl_drm_winsys *vdws = virgl_drm_winsys(vws);
 277    struct drm_virtgpu_3d_transfer_from_host fromhostcmd;
 278
 279    memset(&fromhostcmd, 0, sizeof(fromhostcmd));
 280    fromhostcmd.bo_handle = res->bo_handle;
 281    fromhostcmd.level = level;
 282    fromhostcmd.offset = buf_offset;
 283   // fromhostcmd.stride = stride;
 284   // fromhostcmd.layer_stride = layer_stride;
 285    fromhostcmd.box = *(struct drm_virtgpu_3d_box *)box;
 286    return drmIoctl(vdws->fd, DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST, &fromhostcmd);
 287 }
 288
 289 static struct virgl_hw_res *
 290 virgl_drm_winsys_resource_cache_create(struct virgl_winsys *qws,
 291                                        enum pipe_texture_target target,
 292                                        uint32_t format,
 293                                        uint32_t bind,
 294                                        uint32_t width,
 295                                        uint32_t height,
 296                                        uint32_t depth,
 297                                        uint32_t array_size,
 298                                        uint32_t last_level,
 299                                        uint32_t nr_samples,
 300                                        uint32_t size)
 301 {
 302    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 303    struct virgl_hw_res *res, *curr_res;
 304    struct list_head *curr, *next;
 305    int64_t now;
 306    int ret;
 307
 308    /* only store binds for vertex/index/const buffers */
 309    if (bind != VIRGL_BIND_CONSTANT_BUFFER && bind != VIRGL_BIND_INDEX_BUFFER &&
 310        bind != VIRGL_BIND_VERTEX_BUFFER && bind != VIRGL_BIND_CUSTOM)
 311       goto alloc;
 312
 313    pipe_mutex_lock(qdws->mutex);
 314
 315    res = NULL;
 316    curr = qdws->delayed.next;
 317    next = curr->next;
 318
 319    now = os_time_get();
 320    while (curr != &qdws->delayed) {
 321       curr_res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 322
 323       if (!res && ((ret = virgl_is_res_compat(qdws, curr_res, size, bind, format)) > 0))
 324          res = curr_res;
 325       else if (os_time_timeout(curr_res->start, curr_res->end, now)) {
 326          LIST_DEL(&curr_res->head);
 327          virgl_hw_res_destroy(qdws, curr_res);
 328       } else
 329          break;
 330
 331       if (ret == -1)
 332          break;
 333
 334       curr = next;
 335       next = curr->next;
 336    }
 337
 338    if (!res && ret != -1) {
 339       while (curr != &qdws->delayed) {
 340          curr_res = LIST_ENTRY(struct virgl_hw_res, curr, head);
 341          ret = virgl_is_res_compat(qdws, curr_res, size, bind, format);
 342          if (ret > 0) {
 343             res = curr_res;
 344             break;
 345          }
 346          if (ret == -1)
 347             break;
 348          curr = next;
 349          next = curr->next;
 350       }
 351    }
 352
 353    if (res) {
 354       LIST_DEL(&res->head);
 355       --qdws->num_delayed;
 356       pipe_mutex_unlock(qdws->mutex);
 357       pipe_reference_init(&res->reference, 1);
 358       return res;
 359    }
 360
 361    pipe_mutex_unlock(qdws->mutex);
 362
 363 alloc:
 364    res = virgl_drm_winsys_resource_create(qws, target, format, bind,
 365                                            width, height, depth, array_size,
 366                                            last_level, nr_samples, size);
 367    if (bind == VIRGL_BIND_CONSTANT_BUFFER || bind == VIRGL_BIND_INDEX_BUFFER ||
 368        bind == VIRGL_BIND_VERTEX_BUFFER)
 369       res->cacheable = TRUE;
 370    return res;
 371 }
 372
 373 static struct virgl_hw_res *
 374 virgl_drm_winsys_resource_create_handle(struct virgl_winsys *qws,
 375                                         struct winsys_handle *whandle)
 376 {
 377    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 378    struct drm_gem_open open_arg = {};
 379    struct drm_virtgpu_resource_info info_arg = {};
 380    struct virgl_hw_res *res;
 381    uint32_t handle = whandle->handle;
 382
 383    if (whandle->offset != 0) {
 384       fprintf(stderr, "attempt to import unsupported winsys offset %u\n",
 385               whandle->offset);
 386       return NULL;
 387    }
 388
 389    pipe_mutex_lock(qdws->bo_handles_mutex);
 390
 391    if (whandle->type == DRM_API_HANDLE_TYPE_SHARED) {
 392       res = util_hash_table_get(qdws->bo_names, (void*)(uintptr_t)handle);
 393       if (res) {
 394          struct virgl_hw_res *r = NULL;
 395          virgl_drm_resource_reference(qdws, &r, res);
 396          goto done;
 397       }
 398    }
 399
 400    if (whandle->type == DRM_API_HANDLE_TYPE_FD) {
 401       int r;
 402       r = drmPrimeFDToHandle(qdws->fd, whandle->handle, &handle);
 403       if (r) {
 404          res = NULL;
 405          goto done;
 406       }
 407    }
 408
 409    res = util_hash_table_get(qdws->bo_handles, (void*)(uintptr_t)handle);
 410    fprintf(stderr, "resource %p for handle %d, pfd=%d\n", res, handle, whandle->handle);
 411    if (res) {
 412       struct virgl_hw_res *r = NULL;
 413       virgl_drm_resource_reference(qdws, &r, res);
 414       goto done;
 415    }
 416
 417    res = CALLOC_STRUCT(virgl_hw_res);
 418    if (!res)
 419       goto done;
 420
 421    if (whandle->type == DRM_API_HANDLE_TYPE_FD) {
 422       res->bo_handle = handle;
 423    } else {
 424       fprintf(stderr, "gem open handle %d\n", handle);
 425       memset(&open_arg, 0, sizeof(open_arg));
 426       open_arg.name = whandle->handle;
 427       if (drmIoctl(qdws->fd, DRM_IOCTL_GEM_OPEN, &open_arg)) {
 428          FREE(res);
 429          res = NULL;
 430          goto done;
 431       }
 432       res->bo_handle = open_arg.handle;
 433    }
 434    res->name = handle;
 435
 436    memset(&info_arg, 0, sizeof(info_arg));
 437    info_arg.bo_handle = res->bo_handle;
 438
 439    if (drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_RESOURCE_INFO, &info_arg)) {
 440       /* close */
 441       FREE(res);
 442       res = NULL;
 443       goto done;
 444    }
 445
 446    res->res_handle = info_arg.res_handle;
 447
 448    res->size = info_arg.size;
 449    res->stride = info_arg.stride;
 450    pipe_reference_init(&res->reference, 1);
 451    res->num_cs_references = 0;
 452
 453    util_hash_table_set(qdws->bo_handles, (void *)(uintptr_t)handle, res);
 454
 455 done:
 456    pipe_mutex_unlock(qdws->bo_handles_mutex);
 457    return res;
 458 }
 459
 460 static boolean virgl_drm_winsys_resource_get_handle(struct virgl_winsys *qws,
 461                                                     struct virgl_hw_res *res,
 462                                                     uint32_t stride,
 463                                                     struct winsys_handle *whandle)
 464  {
 465    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 466    struct drm_gem_flink flink;
 467
 468    if (!res)
 469        return FALSE;
 470
 471    if (whandle->type == DRM_API_HANDLE_TYPE_SHARED) {
 472       if (!res->flinked) {
 473          memset(&flink, 0, sizeof(flink));
 474          flink.handle = res->bo_handle;
 475
 476          if (drmIoctl(qdws->fd, DRM_IOCTL_GEM_FLINK, &flink)) {
 477             return FALSE;
 478          }
 479          res->flinked = TRUE;
 480          res->flink = flink.name;
 481
 482          pipe_mutex_lock(qdws->bo_handles_mutex);
 483          util_hash_table_set(qdws->bo_names, (void *)(uintptr_t)res->flink, res);
 484          pipe_mutex_unlock(qdws->bo_handles_mutex);
 485       }
 486       whandle->handle = res->flink;
 487    } else if (whandle->type == DRM_API_HANDLE_TYPE_KMS) {
 488       whandle->handle = res->bo_handle;
 489    } else if (whandle->type == DRM_API_HANDLE_TYPE_FD) {
 490       if (drmPrimeHandleToFD(qdws->fd, res->bo_handle, DRM_CLOEXEC, (int*)&whandle->handle))
 491             return FALSE;
 492    }
 493    whandle->stride = stride;
 494    return TRUE;
 495 }
 496
 497 static void virgl_drm_winsys_resource_unref(struct virgl_winsys *qws,
 498                                             struct virgl_hw_res *hres)
 499 {
 500    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 501
 502    virgl_drm_resource_reference(qdws, &hres, NULL);
 503 }
 504
 505 static void *virgl_drm_resource_map(struct virgl_winsys *qws,
 506                                     struct virgl_hw_res *res)
 507 {
 508    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 509    struct drm_virtgpu_map mmap_arg;
 510    void *ptr;
 511
 512    if (res->ptr)
 513       return res->ptr;
 514
 515    memset(&mmap_arg, 0, sizeof(mmap_arg));
 516    mmap_arg.handle = res->bo_handle;
 517    if (drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_MAP, &mmap_arg))
 518       return NULL;
 519
 520    ptr = os_mmap(0, res->size, PROT_READ|PROT_WRITE, MAP_SHARED,
 521                  qdws->fd, mmap_arg.offset);
 522    if (ptr == MAP_FAILED)
 523       return NULL;
 524
 525    res->ptr = ptr;
 526    return ptr;
 527
 528 }
 529
 530 static void virgl_drm_resource_wait(struct virgl_winsys *qws,
 531                                     struct virgl_hw_res *res)
 532 {
 533    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 534    struct drm_virtgpu_3d_wait waitcmd;
 535    int ret;
 536
 537    memset(&waitcmd, 0, sizeof(waitcmd));
 538    waitcmd.handle = res->bo_handle;
 539  again:
 540    ret = drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_WAIT, &waitcmd);
 541    if (ret == -EAGAIN)
 542       goto again;
 543 }
 544
 545 static struct virgl_cmd_buf *virgl_drm_cmd_buf_create(struct virgl_winsys *qws)
 546 {
 547    struct virgl_drm_cmd_buf *cbuf;
 548
 549    cbuf = CALLOC_STRUCT(virgl_drm_cmd_buf);
 550    if (!cbuf)
 551       return NULL;
 552
 553    cbuf->ws = qws;
 554
 555    cbuf->nres = 512;
 556    cbuf->res_bo = CALLOC(cbuf->nres, sizeof(struct virgl_hw_buf*));
 557    if (!cbuf->res_bo) {
 558       FREE(cbuf);
 559       return NULL;
 560    }
 561    cbuf->res_hlist = MALLOC(cbuf->nres * sizeof(uint32_t));
 562    if (!cbuf->res_hlist) {
 563       FREE(cbuf->res_bo);
 564       FREE(cbuf);
 565       return NULL;
 566    }
 567
 568    cbuf->base.buf = cbuf->buf;
 569    return &cbuf->base;
 570 }
 571
 572 static void virgl_drm_cmd_buf_destroy(struct virgl_cmd_buf *_cbuf)
 573 {
 574    struct virgl_drm_cmd_buf *cbuf = virgl_drm_cmd_buf(_cbuf);
 575
 576    FREE(cbuf->res_hlist);
 577    FREE(cbuf->res_bo);
 578    FREE(cbuf);
 579
 580 }
 581
 582 static int virgl_drm_lookup_res(struct virgl_drm_cmd_buf *cbuf,
 583                                     struct virgl_hw_res *res)
 584 {
 585    if (!res) return false;
 586    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
 587    int i;
 588
 589    if (cbuf->is_handle_added[hash]) {
 590       i = cbuf->reloc_indices_hashlist[hash];
 591       if (cbuf->res_bo[i] == res)
 592          return i;
 593
 594       for (i = 0; i < cbuf->cres; i++) {
 595          if (cbuf->res_bo[i] == res) {
 596             cbuf->reloc_indices_hashlist[hash] = i;
 597             return i;
 598          }
 599       }
 600    }
 601    return -1;
 602 }
 603
 604 static void virgl_drm_add_res(struct virgl_drm_winsys *qdws,
 605                               struct virgl_drm_cmd_buf *cbuf,
 606                               struct virgl_hw_res *res,
 607                               enum virgl_bo_usage usage)
 608 {
 609    if (!res) return;
 610    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
 611
 612    if (cbuf->cres > cbuf->nres) {
 613       fprintf(stderr,"failure to add relocation\n");
 614       return;
 615    }
 616
 617    cbuf->res_bo[cbuf->cres] = NULL;
 618    virgl_drm_resource_reference(qdws, &cbuf->res_bo[cbuf->cres], res);
 619    cbuf->bo_usage[cbuf->cres] = usage;
 620    cbuf->res_hlist[cbuf->cres] = res->bo_handle;
 621    cbuf->is_handle_added[hash] = TRUE;
 622
 623    cbuf->reloc_indices_hashlist[hash] = cbuf->cres;
 624    p_atomic_inc(&res->num_cs_references);
 625    cbuf->cres++;
 626 }
 627
 628 static void virgl_drm_release_all_res(struct virgl_drm_winsys *qdws,
 629                                       struct virgl_drm_cmd_buf *cbuf)
 630 {
 631    int i;
 632
 633    for (i = 0; i < cbuf->cres; i++) {
 634       p_atomic_dec(&cbuf->res_bo[i]->num_cs_references);
 635       virgl_drm_resource_reference(qdws, &cbuf->res_bo[i], NULL);
 636    }
 637    cbuf->cres = 0;
 638 }
 639
 640 static void virgl_drm_emit_res(struct virgl_winsys *qws,
 641                                struct virgl_cmd_buf *_cbuf,
 642                                struct virgl_hw_res *res,
 643                                boolean write_buf,
 644                                enum virgl_bo_usage usage)
 645 {
 646    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 647    struct virgl_drm_cmd_buf *cbuf = virgl_drm_cmd_buf(_cbuf);
 648    int index_in_list = virgl_drm_lookup_res(cbuf, res);
 649
 650    if (write_buf)
 651       cbuf->base.buf[cbuf->base.cdw++] = res->res_handle;
 652
 653    if (index_in_list == -1)
 654       virgl_drm_add_res(qdws, cbuf, res, usage);
 655    else
 656       cbuf->bo_usage[index_in_list] |= usage;
 657 }
 658
 659 static boolean virgl_drm_res_is_ref(struct virgl_winsys *qws,
 660                                     struct virgl_cmd_buf *_cbuf,
 661                                     struct virgl_hw_res *res,
 662                                     enum virgl_bo_usage usage)
 663 {
 664    struct virgl_drm_cmd_buf *cbuf = virgl_drm_cmd_buf(_cbuf);
 665    int index;
 666
 667    /* no commands in cbuf yet */
 668    if (cbuf->base.cdw <= 2)
 669       return FALSE;
 670    if (!res->num_cs_references)
 671       return FALSE;
 672
 673    index = virgl_drm_lookup_res(cbuf, res);
 674    if (index == -1)
 675       return FALSE;
 676
 677    if (cbuf->bo_usage[index] & usage)
 678       return true;
 679    return false;
 680 }
 681
 682 static int virgl_drm_winsys_submit_cmd(struct virgl_winsys *qws,
 683                                        struct virgl_cmd_buf *_cbuf)
 684 {
 685    struct virgl_drm_winsys *qdws = virgl_drm_winsys(qws);
 686    struct virgl_drm_cmd_buf *cbuf = virgl_drm_cmd_buf(_cbuf);
 687    struct drm_virtgpu_execbuffer eb;
 688    int ret;
 689
 690    if (cbuf->base.cdw == 0)
 691       return 0;
 692
 693    memset(&eb, 0, sizeof(struct drm_virtgpu_execbuffer));
 694    eb.command = (unsigned long)(void*)cbuf->buf;
 695    eb.size = cbuf->base.cdw * 4;
 696    eb.num_bo_handles = cbuf->cres;
 697    eb.bo_handles = (unsigned long)(void *)cbuf->res_hlist;
 698
 699    ret = drmIoctl(qdws->fd, DRM_IOCTL_VIRTGPU_EXECBUFFER, &eb);
 700    if (ret == -1)
 701       fprintf(stderr,"got error from kernel - expect bad rendering %d\n", errno);
 702    cbuf->base.cdw = 0;
 703
 704    virgl_drm_release_all_res(qdws, cbuf);
 705
 706    memset(cbuf->is_handle_added, 0, sizeof(cbuf->is_handle_added));
 707    memset(cbuf->bo_usage, 0, sizeof(cbuf->bo_usage));
 708    return ret;
 709 }
 710
 711 static int virgl_drm_get_caps(struct virgl_winsys *vws,
 712                               struct virgl_drm_caps *caps)
 713 {
 714    struct virgl_drm_winsys *vdws = virgl_drm_winsys(vws);
 715    struct drm_virtgpu_get_caps args;
 716
 717    memset(&args, 0, sizeof(args));
 718
 719    args.cap_set_id = 1;
 720    args.addr = (unsigned long)&caps->caps;
 721    args.size = sizeof(union virgl_caps);
 722    return drmIoctl(vdws->fd, DRM_IOCTL_VIRTGPU_GET_CAPS, &args);
 723 }
 724
 725 #define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
 726
 727 static unsigned handle_hash(void *key)
 728 {
 729     return PTR_TO_UINT(key);
 730 }
 731
 732 static int handle_compare(void *key1, void *key2)
 733 {
 734     return PTR_TO_UINT(key1) != PTR_TO_UINT(key2);
 735 }
 736
 737 static struct pipe_fence_handle *
 738 virgl_cs_create_fence(struct virgl_winsys *vws)
 739 {
 740    struct virgl_hw_res *res;
 741
 742    res = virgl_drm_winsys_resource_cache_create(vws,
 743                                                 PIPE_BUFFER,
 744                                                 PIPE_FORMAT_R8_UNORM,
 745                                                 VIRGL_BIND_CUSTOM,
 746                                                 8, 1, 1, 0, 0, 0, 8);
 747
 748    return (struct pipe_fence_handle *)res;
 749 }
 750
 751 static bool virgl_fence_wait(struct virgl_winsys *vws,
 752                              struct pipe_fence_handle *fence,
 753                              uint64_t timeout)
 754 {
 755    struct virgl_drm_winsys *vdws = virgl_drm_winsys(vws);
 756    struct virgl_hw_res *res = virgl_hw_res(fence);
 757
 758    if (timeout == 0)
 759       return !virgl_drm_resource_is_busy(vdws, res);
 760
 761    if (timeout != PIPE_TIMEOUT_INFINITE) {
 762       int64_t start_time = os_time_get();
 763       timeout /= 1000;
 764       while (virgl_drm_resource_is_busy(vdws, res)) {
 765          if (os_time_get() - start_time >= timeout)
 766             return FALSE;
 767          os_time_sleep(10);
 768       }
 769       return TRUE;
 770    }
 771    virgl_drm_resource_wait(vws, res);
 772    return TRUE;
 773 }
 774
 775 static void virgl_fence_reference(struct virgl_winsys *vws,
 776                                   struct pipe_fence_handle **dst,
 777                                   struct pipe_fence_handle *src)
 778 {
 779    struct virgl_drm_winsys *vdws = virgl_drm_winsys(vws);
 780    virgl_drm_resource_reference(vdws, (struct virgl_hw_res **)dst,
 781                                 virgl_hw_res(src));
 782 }
 783
 784
 785 static struct virgl_winsys *
 786 virgl_drm_winsys_create(int drmFD)
 787 {
 788    struct virgl_drm_winsys *qdws;
 789
 790    qdws = CALLOC_STRUCT(virgl_drm_winsys);
 791    if (!qdws)
 792       return NULL;
 793
 794    qdws->fd = drmFD;
 795    qdws->num_delayed = 0;
 796    qdws->usecs = 1000000;
 797    LIST_INITHEAD(&qdws->delayed);
 798    pipe_mutex_init(qdws->mutex);
 799    pipe_mutex_init(qdws->bo_handles_mutex);
 800    qdws->bo_handles = util_hash_table_create(handle_hash, handle_compare);
 801    qdws->bo_names = util_hash_table_create(handle_hash, handle_compare);
 802    qdws->base.destroy = virgl_drm_winsys_destroy;
 803
 804    qdws->base.transfer_put = virgl_bo_transfer_put;
 805    qdws->base.transfer_get = virgl_bo_transfer_get;
 806    qdws->base.resource_create = virgl_drm_winsys_resource_cache_create;
 807    qdws->base.resource_unref = virgl_drm_winsys_resource_unref;
 808    qdws->base.resource_create_from_handle = virgl_drm_winsys_resource_create_handle;
 809    qdws->base.resource_get_handle = virgl_drm_winsys_resource_get_handle;
 810    qdws->base.resource_map = virgl_drm_resource_map;
 811    qdws->base.resource_wait = virgl_drm_resource_wait;
 812    qdws->base.cmd_buf_create = virgl_drm_cmd_buf_create;
 813    qdws->base.cmd_buf_destroy = virgl_drm_cmd_buf_destroy;
 814    qdws->base.submit_cmd = virgl_drm_winsys_submit_cmd;
 815    qdws->base.emit_res = virgl_drm_emit_res;
 816    qdws->base.res_is_referenced = virgl_drm_res_is_ref;
 817
 818    qdws->base.cs_create_fence = virgl_cs_create_fence;
 819    qdws->base.fence_wait = virgl_fence_wait;
 820    qdws->base.fence_reference = virgl_fence_reference;
 821
 822    qdws->base.get_caps = virgl_drm_get_caps;
 823    return &qdws->base;
 824
 825 }
 826
 827 static struct util_hash_table *fd_tab = NULL;
 828 pipe_static_mutex(virgl_screen_mutex);
 829
 830 static void
 831 virgl_drm_screen_destroy(struct pipe_screen *pscreen)
 832 {
 833    struct virgl_screen *screen = virgl_screen(pscreen);
 834    boolean destroy;
 835
 836    pipe_mutex_lock(virgl_screen_mutex);
 837    destroy = --screen->refcnt == 0;
 838    if (destroy) {
 839       int fd = virgl_drm_winsys(screen->vws)->fd;
 840       util_hash_table_remove(fd_tab, intptr_to_pointer(fd));
 841    }
 842    pipe_mutex_unlock(virgl_screen_mutex);
 843
 844    if (destroy) {
 845       pscreen->destroy = screen->winsys_priv;
 846       pscreen->destroy(pscreen);
 847    }
 848 }
 849
 850 static unsigned hash_fd(void *key)
 851 {
 852    int fd = pointer_to_intptr(key);
 853    struct stat stat;
 854    fstat(fd, &stat);
 855
 856    return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
 857 }
 858
 859 static int compare_fd(void *key1, void *key2)
 860 {
 861    int fd1 = pointer_to_intptr(key1);
 862    int fd2 = pointer_to_intptr(key2);
 863    struct stat stat1, stat2;
 864    fstat(fd1, &stat1);
 865    fstat(fd2, &stat2);
 866
 867    return stat1.st_dev != stat2.st_dev ||
 868          stat1.st_ino != stat2.st_ino ||
 869          stat1.st_rdev != stat2.st_rdev;
 870 }
 871
 872 struct pipe_screen *
 873 virgl_drm_screen_create(int fd)
 874 {
 875    struct pipe_screen *pscreen = NULL;
 876
 877    pipe_mutex_lock(virgl_screen_mutex);
 878    if (!fd_tab) {
 879       fd_tab = util_hash_table_create(hash_fd, compare_fd);
 880       if (!fd_tab)
 881          goto unlock;
 882    }
 883
 884    pscreen = util_hash_table_get(fd_tab, intptr_to_pointer(fd));
 885    if (pscreen) {
 886       virgl_screen(pscreen)->refcnt++;
 887    } else {
 888       struct virgl_winsys *vws;
 889       int dup_fd = dup(fd);
 890
 891       vws = virgl_drm_winsys_create(dup_fd);
 892
 893       pscreen = virgl_create_screen(vws);
 894       if (pscreen) {
 895          util_hash_table_set(fd_tab, intptr_to_pointer(dup_fd), pscreen);
 896
 897          /* Bit of a hack, to avoid circular linkage dependency,
 898           * ie. pipe driver having to call in to winsys, we
 899           * override the pipe drivers screen->destroy():
 900           */
 901          virgl_screen(pscreen)->winsys_priv = pscreen->destroy;
 902          pscreen->destroy = virgl_drm_screen_destroy;
 903       }
 904    }
 905
 906 unlock:
 907    pipe_mutex_unlock(virgl_screen_mutex);
 908    return pscreen;
 909 }