src/vulkan/wsi/wsi_common_x11.c

   1 /*
   2  * Copyright © 2015 Intel Corporation
   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, sublicense,
   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 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 NONINFRINGEMENT.  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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <X11/Xlib-xcb.h>
  25 #include <X11/xshmfence.h>
  26 #include <xcb/xcb.h>
  27 #include <xcb/dri3.h>
  28 #include <xcb/present.h>
  29
  30 #include "util/macros.h"
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <string.h>
  36
  37 #include <poll.h>
  38 #include "util/hash_table.h"
  39
  40 #include "wsi_common.h"
  41 #include "wsi_common_x11.h"
  42
  43 #define typed_memcpy(dest, src, count) ({ \
  44    static_assert(sizeof(*src) == sizeof(*dest), ""); \
  45    memcpy((dest), (src), (count) * sizeof(*(src))); \
  46 })
  47
  48 struct wsi_x11_connection {
  49    bool has_dri3;
  50    bool has_present;
  51 };
  52
  53 struct wsi_x11 {
  54    struct wsi_interface base;
  55
  56    pthread_mutex_t                              mutex;
  57    /* Hash table of xcb_connection -> wsi_x11_connection mappings */
  58    struct hash_table *connections;
  59 };
  60
  61 static struct wsi_x11_connection *
  62 wsi_x11_connection_create(const VkAllocationCallbacks *alloc,
  63                           xcb_connection_t *conn)
  64 {
  65    xcb_query_extension_cookie_t dri3_cookie, pres_cookie;
  66    xcb_query_extension_reply_t *dri3_reply, *pres_reply;
  67
  68    struct wsi_x11_connection *wsi_conn =
  69       vk_alloc(alloc, sizeof(*wsi_conn), 8,
  70                 VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
  71    if (!wsi_conn)
  72       return NULL;
  73
  74    dri3_cookie = xcb_query_extension(conn, 4, "DRI3");
  75    pres_cookie = xcb_query_extension(conn, 7, "PRESENT");
  76
  77    dri3_reply = xcb_query_extension_reply(conn, dri3_cookie, NULL);
  78    pres_reply = xcb_query_extension_reply(conn, pres_cookie, NULL);
  79    if (dri3_reply == NULL || pres_reply == NULL) {
  80       free(dri3_reply);
  81       free(pres_reply);
  82       vk_free(alloc, wsi_conn);
  83       return NULL;
  84    }
  85
  86    wsi_conn->has_dri3 = dri3_reply->present != 0;
  87    wsi_conn->has_present = pres_reply->present != 0;
  88
  89    free(dri3_reply);
  90    free(pres_reply);
  91
  92    return wsi_conn;
  93 }
  94
  95 static void
  96 wsi_x11_connection_destroy(const VkAllocationCallbacks *alloc,
  97                            struct wsi_x11_connection *conn)
  98 {
  99    vk_free(alloc, conn);
 100 }
 101
 102 static struct wsi_x11_connection *
 103 wsi_x11_get_connection(struct wsi_device *wsi_dev,
 104                        const VkAllocationCallbacks *alloc,
 105                        xcb_connection_t *conn)
 106 {
 107    struct wsi_x11 *wsi =
 108       (struct wsi_x11 *)wsi_dev->wsi[VK_ICD_WSI_PLATFORM_XCB];
 109
 110    pthread_mutex_lock(&wsi->mutex);
 111
 112    struct hash_entry *entry = _mesa_hash_table_search(wsi->connections, conn);
 113    if (!entry) {
 114       /* We're about to make a bunch of blocking calls.  Let's drop the
 115        * mutex for now so we don't block up too badly.
 116        */
 117       pthread_mutex_unlock(&wsi->mutex);
 118
 119       struct wsi_x11_connection *wsi_conn =
 120          wsi_x11_connection_create(alloc, conn);
 121       if (!wsi_conn)
 122          return NULL;
 123
 124       pthread_mutex_lock(&wsi->mutex);
 125
 126       entry = _mesa_hash_table_search(wsi->connections, conn);
 127       if (entry) {
 128          /* Oops, someone raced us to it */
 129          wsi_x11_connection_destroy(alloc, wsi_conn);
 130       } else {
 131          entry = _mesa_hash_table_insert(wsi->connections, conn, wsi_conn);
 132       }
 133    }
 134
 135    pthread_mutex_unlock(&wsi->mutex);
 136
 137    return entry->data;
 138 }
 139
 140 static const VkSurfaceFormatKHR formats[] = {
 141    { .format = VK_FORMAT_B8G8R8A8_SRGB, },
 142    { .format = VK_FORMAT_B8G8R8A8_UNORM, },
 143 };
 144
 145 static const VkPresentModeKHR present_modes[] = {
 146    VK_PRESENT_MODE_IMMEDIATE_KHR,
 147    VK_PRESENT_MODE_MAILBOX_KHR,
 148 };
 149
 150 static xcb_screen_t *
 151 get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
 152 {
 153    xcb_screen_iterator_t screen_iter =
 154       xcb_setup_roots_iterator(xcb_get_setup(conn));
 155
 156    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 157       if (screen_iter.data->root == root)
 158          return screen_iter.data;
 159    }
 160
 161    return NULL;
 162 }
 163
 164 static xcb_visualtype_t *
 165 screen_get_visualtype(xcb_screen_t *screen, xcb_visualid_t visual_id,
 166                       unsigned *depth)
 167 {
 168    xcb_depth_iterator_t depth_iter =
 169       xcb_screen_allowed_depths_iterator(screen);
 170
 171    for (; depth_iter.rem; xcb_depth_next (&depth_iter)) {
 172       xcb_visualtype_iterator_t visual_iter =
 173          xcb_depth_visuals_iterator (depth_iter.data);
 174
 175       for (; visual_iter.rem; xcb_visualtype_next (&visual_iter)) {
 176          if (visual_iter.data->visual_id == visual_id) {
 177             if (depth)
 178                *depth = depth_iter.data->depth;
 179             return visual_iter.data;
 180          }
 181       }
 182    }
 183
 184    return NULL;
 185 }
 186
 187 static xcb_visualtype_t *
 188 connection_get_visualtype(xcb_connection_t *conn, xcb_visualid_t visual_id,
 189                           unsigned *depth)
 190 {
 191    xcb_screen_iterator_t screen_iter =
 192       xcb_setup_roots_iterator(xcb_get_setup(conn));
 193
 194    /* For this we have to iterate over all of the screens which is rather
 195     * annoying.  Fortunately, there is probably only 1.
 196     */
 197    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 198       xcb_visualtype_t *visual = screen_get_visualtype(screen_iter.data,
 199                                                        visual_id, depth);
 200       if (visual)
 201          return visual;
 202    }
 203
 204    return NULL;
 205 }
 206
 207 static xcb_visualtype_t *
 208 get_visualtype_for_window(xcb_connection_t *conn, xcb_window_t window,
 209                           unsigned *depth)
 210 {
 211    xcb_query_tree_cookie_t tree_cookie;
 212    xcb_get_window_attributes_cookie_t attrib_cookie;
 213    xcb_query_tree_reply_t *tree;
 214    xcb_get_window_attributes_reply_t *attrib;
 215
 216    tree_cookie = xcb_query_tree(conn, window);
 217    attrib_cookie = xcb_get_window_attributes(conn, window);
 218
 219    tree = xcb_query_tree_reply(conn, tree_cookie, NULL);
 220    attrib = xcb_get_window_attributes_reply(conn, attrib_cookie, NULL);
 221    if (attrib == NULL || tree == NULL) {
 222       free(attrib);
 223       free(tree);
 224       return NULL;
 225    }
 226
 227    xcb_window_t root = tree->root;
 228    xcb_visualid_t visual_id = attrib->visual;
 229    free(attrib);
 230    free(tree);
 231
 232    xcb_screen_t *screen = get_screen_for_root(conn, root);
 233    if (screen == NULL)
 234       return NULL;
 235
 236    return screen_get_visualtype(screen, visual_id, depth);
 237 }
 238
 239 static bool
 240 visual_has_alpha(xcb_visualtype_t *visual, unsigned depth)
 241 {
 242    uint32_t rgb_mask = visual->red_mask |
 243                        visual->green_mask |
 244                        visual->blue_mask;
 245
 246    uint32_t all_mask = 0xffffffff >> (32 - depth);
 247
 248    /* Do we have bits left over after RGB? */
 249    return (all_mask & ~rgb_mask) != 0;
 250 }
 251
 252 VkBool32 wsi_get_physical_device_xcb_presentation_support(
 253     struct wsi_device *wsi_device,
 254     VkAllocationCallbacks *alloc,
 255     uint32_t                                    queueFamilyIndex,
 256     xcb_connection_t*                           connection,
 257     xcb_visualid_t                              visual_id)
 258 {
 259    struct wsi_x11_connection *wsi_conn =
 260       wsi_x11_get_connection(wsi_device, alloc, connection);
 261
 262    if (!wsi_conn->has_dri3) {
 263       fprintf(stderr, "vulkan: No DRI3 support\n");
 264       return false;
 265    }
 266
 267    unsigned visual_depth;
 268    if (!connection_get_visualtype(connection, visual_id, &visual_depth))
 269       return false;
 270
 271    if (visual_depth != 24 && visual_depth != 32)
 272       return false;
 273
 274    return true;
 275 }
 276
 277 static xcb_connection_t*
 278 x11_surface_get_connection(VkIcdSurfaceBase *icd_surface)
 279 {
 280    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 281       return XGetXCBConnection(((VkIcdSurfaceXlib *)icd_surface)->dpy);
 282    else
 283       return ((VkIcdSurfaceXcb *)icd_surface)->connection;
 284 }
 285
 286 static xcb_window_t
 287 x11_surface_get_window(VkIcdSurfaceBase *icd_surface)
 288 {
 289    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 290       return ((VkIcdSurfaceXlib *)icd_surface)->window;
 291    else
 292       return ((VkIcdSurfaceXcb *)icd_surface)->window;
 293 }
 294
 295 static VkResult
 296 x11_surface_get_support(VkIcdSurfaceBase *icd_surface,
 297                         struct wsi_device *wsi_device,
 298                         const VkAllocationCallbacks *alloc,
 299                         uint32_t queueFamilyIndex,
 300                         VkBool32* pSupported)
 301 {
 302    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 303    xcb_window_t window = x11_surface_get_window(icd_surface);
 304
 305    struct wsi_x11_connection *wsi_conn =
 306       wsi_x11_get_connection(wsi_device, alloc, conn);
 307    if (!wsi_conn)
 308       return VK_ERROR_OUT_OF_HOST_MEMORY;
 309
 310    if (!wsi_conn->has_dri3) {
 311       fprintf(stderr, "vulkan: No DRI3 support\n");
 312       *pSupported = false;
 313       return VK_SUCCESS;
 314    }
 315
 316    unsigned visual_depth;
 317    if (!get_visualtype_for_window(conn, window, &visual_depth)) {
 318       *pSupported = false;
 319       return VK_SUCCESS;
 320    }
 321
 322    if (visual_depth != 24 && visual_depth != 32) {
 323       *pSupported = false;
 324       return VK_SUCCESS;
 325    }
 326
 327    *pSupported = true;
 328    return VK_SUCCESS;
 329 }
 330
 331 static VkResult
 332 x11_surface_get_capabilities(VkIcdSurfaceBase *icd_surface,
 333                              VkSurfaceCapabilitiesKHR *caps)
 334 {
 335    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 336    xcb_window_t window = x11_surface_get_window(icd_surface);
 337    xcb_get_geometry_cookie_t geom_cookie;
 338    xcb_generic_error_t *err;
 339    xcb_get_geometry_reply_t *geom;
 340    unsigned visual_depth;
 341
 342    geom_cookie = xcb_get_geometry(conn, window);
 343
 344    /* This does a round-trip.  This is why we do get_geometry first and
 345     * wait to read the reply until after we have a visual.
 346     */
 347    xcb_visualtype_t *visual =
 348       get_visualtype_for_window(conn, window, &visual_depth);
 349
 350    geom = xcb_get_geometry_reply(conn, geom_cookie, &err);
 351    if (geom) {
 352       VkExtent2D extent = { geom->width, geom->height };
 353       caps->currentExtent = extent;
 354       caps->minImageExtent = extent;
 355       caps->maxImageExtent = extent;
 356    } else {
 357       /* This can happen if the client didn't wait for the configure event
 358        * to come back from the compositor.  In that case, we don't know the
 359        * size of the window so we just return valid "I don't know" stuff.
 360        */
 361       caps->currentExtent = (VkExtent2D) { -1, -1 };
 362       caps->minImageExtent = (VkExtent2D) { 1, 1 };
 363       caps->maxImageExtent = (VkExtent2D) { INT16_MAX, INT16_MAX };
 364    }
 365    free(err);
 366    free(geom);
 367
 368    if (visual_has_alpha(visual, visual_depth)) {
 369       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 370                                       VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR;
 371    } else {
 372       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 373                                       VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 374    }
 375
 376    /* For true mailbox mode, we need at least 4 images:
 377     *  1) One to scan out from
 378     *  2) One to have queued for scan-out
 379     *  3) One to be currently held by the X server
 380     *  4) One to render to
 381     */
 382    caps->minImageCount = 2;
 383    /* There is no real maximum */
 384    caps->maxImageCount = 0;
 385
 386    caps->supportedTransforms = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 387    caps->currentTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 388    caps->maxImageArrayLayers = 1;
 389    caps->supportedUsageFlags =
 390       VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
 391       VK_IMAGE_USAGE_SAMPLED_BIT |
 392       VK_IMAGE_USAGE_TRANSFER_DST_BIT |
 393       VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 394
 395    return VK_SUCCESS;
 396 }
 397
 398 static VkResult
 399 x11_surface_get_formats(VkIcdSurfaceBase *surface,
 400                         struct wsi_device *wsi_device,
 401                         uint32_t *pSurfaceFormatCount,
 402                         VkSurfaceFormatKHR *pSurfaceFormats)
 403 {
 404    if (pSurfaceFormats == NULL) {
 405       *pSurfaceFormatCount = ARRAY_SIZE(formats);
 406       return VK_SUCCESS;
 407    }
 408
 409    *pSurfaceFormatCount = MIN2(*pSurfaceFormatCount, ARRAY_SIZE(formats));
 410    typed_memcpy(pSurfaceFormats, formats, *pSurfaceFormatCount);
 411
 412    return *pSurfaceFormatCount < ARRAY_SIZE(formats) ?
 413       VK_INCOMPLETE : VK_SUCCESS;
 414 }
 415
 416 static VkResult
 417 x11_surface_get_present_modes(VkIcdSurfaceBase *surface,
 418                               uint32_t *pPresentModeCount,
 419                               VkPresentModeKHR *pPresentModes)
 420 {
 421    if (pPresentModes == NULL) {
 422       *pPresentModeCount = ARRAY_SIZE(present_modes);
 423       return VK_SUCCESS;
 424    }
 425
 426    *pPresentModeCount = MIN2(*pPresentModeCount, ARRAY_SIZE(present_modes));
 427    typed_memcpy(pPresentModes, present_modes, *pPresentModeCount);
 428
 429    return *pPresentModeCount < ARRAY_SIZE(present_modes) ?
 430       VK_INCOMPLETE : VK_SUCCESS;
 431 }
 432
 433 VkResult wsi_create_xcb_surface(const VkAllocationCallbacks *pAllocator,
 434                                 const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
 435                                 VkSurfaceKHR *pSurface)
 436 {
 437    VkIcdSurfaceXcb *surface;
 438
 439    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 440                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 441    if (surface == NULL)
 442       return VK_ERROR_OUT_OF_HOST_MEMORY;
 443
 444    surface->base.platform = VK_ICD_WSI_PLATFORM_XCB;
 445    surface->connection = pCreateInfo->connection;
 446    surface->window = pCreateInfo->window;
 447
 448    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 449    return VK_SUCCESS;
 450 }
 451
 452 VkResult wsi_create_xlib_surface(const VkAllocationCallbacks *pAllocator,
 453                                  const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
 454                                  VkSurfaceKHR *pSurface)
 455 {
 456    VkIcdSurfaceXlib *surface;
 457
 458    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 459                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 460    if (surface == NULL)
 461       return VK_ERROR_OUT_OF_HOST_MEMORY;
 462
 463    surface->base.platform = VK_ICD_WSI_PLATFORM_XLIB;
 464    surface->dpy = pCreateInfo->dpy;
 465    surface->window = pCreateInfo->window;
 466
 467    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 468    return VK_SUCCESS;
 469 }
 470
 471 struct x11_image {
 472    VkImage image;
 473    VkDeviceMemory memory;
 474    xcb_pixmap_t                              pixmap;
 475    bool                                      busy;
 476    struct xshmfence *                        shm_fence;
 477    uint32_t                                  sync_fence;
 478 };
 479
 480 struct x11_swapchain {
 481    struct wsi_swapchain                        base;
 482
 483    xcb_connection_t *                           conn;
 484    xcb_window_t                                 window;
 485    xcb_gc_t                                     gc;
 486    uint32_t                                     depth;
 487    VkExtent2D                                   extent;
 488    uint32_t                                     image_count;
 489
 490    xcb_present_event_t                          event_id;
 491    xcb_special_event_t *                        special_event;
 492    uint64_t                                     send_sbc;
 493    uint32_t                                     stamp;
 494
 495    struct x11_image                             images[0];
 496 };
 497
 498 static VkResult
 499 x11_get_images(struct wsi_swapchain *anv_chain,
 500                uint32_t* pCount, VkImage *pSwapchainImages)
 501 {
 502    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 503
 504    if (pSwapchainImages == NULL) {
 505       *pCount = chain->image_count;
 506       return VK_SUCCESS;
 507    }
 508
 509    assert(chain->image_count <= *pCount);
 510    for (uint32_t i = 0; i < chain->image_count; i++)
 511       pSwapchainImages[i] = chain->images[i].image;
 512
 513    *pCount = chain->image_count;
 514
 515    return VK_SUCCESS;
 516 }
 517
 518 static VkResult
 519 x11_handle_dri3_present_event(struct x11_swapchain *chain,
 520                               xcb_present_generic_event_t *event)
 521 {
 522    switch (event->evtype) {
 523    case XCB_PRESENT_CONFIGURE_NOTIFY: {
 524       xcb_present_configure_notify_event_t *config = (void *) event;
 525
 526       if (config->width != chain->extent.width ||
 527           config->height != chain->extent.height)
 528          return VK_ERROR_OUT_OF_DATE_KHR;
 529
 530       break;
 531    }
 532
 533    case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
 534       xcb_present_idle_notify_event_t *idle = (void *) event;
 535
 536       for (unsigned i = 0; i < chain->image_count; i++) {
 537          if (chain->images[i].pixmap == idle->pixmap) {
 538             chain->images[i].busy = false;
 539             break;
 540          }
 541       }
 542
 543       break;
 544    }
 545
 546    case XCB_PRESENT_COMPLETE_NOTIFY:
 547    default:
 548       break;
 549    }
 550
 551    return VK_SUCCESS;
 552 }
 553
 554
 555 static uint64_t wsi_get_current_time(void)
 556 {
 557    uint64_t current_time;
 558    struct timespec tv;
 559
 560    clock_gettime(CLOCK_MONOTONIC, &tv);
 561    current_time = tv.tv_nsec + tv.tv_sec*1000000000ull;
 562    return current_time;
 563 }
 564
 565 static uint64_t wsi_get_absolute_timeout(uint64_t timeout)
 566 {
 567    uint64_t current_time = wsi_get_current_time();
 568
 569    timeout = MIN2(UINT64_MAX - current_time, timeout);
 570
 571    return current_time + timeout;
 572 }
 573
 574 static VkResult
 575 x11_acquire_next_image(struct wsi_swapchain *anv_chain,
 576                        uint64_t timeout,
 577                        VkSemaphore semaphore,
 578                        uint32_t *image_index)
 579 {
 580    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 581    xcb_generic_event_t *event;
 582    struct pollfd pfds;
 583    uint64_t atimeout;
 584    while (1) {
 585       for (uint32_t i = 0; i < chain->image_count; i++) {
 586          if (!chain->images[i].busy) {
 587             /* We found a non-busy image */
 588             xshmfence_await(chain->images[i].shm_fence);
 589             *image_index = i;
 590             chain->images[i].busy = true;
 591             return VK_SUCCESS;
 592          }
 593       }
 594
 595       xcb_flush(chain->conn);
 596
 597       if (timeout == UINT64_MAX) {
 598          event = xcb_wait_for_special_event(chain->conn, chain->special_event);
 599          if (!event)
 600             return VK_ERROR_OUT_OF_DATE_KHR;
 601       } else {
 602          event = xcb_poll_for_special_event(chain->conn, chain->special_event);
 603          if (!event) {
 604             int ret;
 605             if (timeout == 0)
 606                return VK_NOT_READY;
 607
 608             atimeout = wsi_get_absolute_timeout(timeout);
 609
 610             pfds.fd = xcb_get_file_descriptor(chain->conn);
 611             pfds.events = POLLIN;
 612             ret = poll(&pfds, 1, timeout / 1000 / 1000);
 613             if (ret == 0)
 614                return VK_TIMEOUT;
 615             if (ret == -1)
 616                return VK_ERROR_OUT_OF_DATE_KHR;
 617
 618             /* If a non-special event happens, the fd will still
 619              * poll. So recalculate the timeout now just in case.
 620              */
 621             uint64_t current_time = wsi_get_current_time();
 622             if (atimeout > current_time)
 623                timeout = atimeout - current_time;
 624             else
 625                timeout = 0;
 626             continue;
 627          }
 628       }
 629
 630       VkResult result = x11_handle_dri3_present_event(chain, (void *)event);
 631       free(event);
 632       if (result != VK_SUCCESS)
 633          return result;
 634    }
 635 }
 636
 637 static VkResult
 638 x11_queue_present(struct wsi_swapchain *anv_chain,
 639                   uint32_t image_index)
 640 {
 641    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 642    struct x11_image *image = &chain->images[image_index];
 643
 644    assert(image_index < chain->image_count);
 645
 646    uint32_t options = XCB_PRESENT_OPTION_NONE;
 647
 648    int64_t target_msc = 0;
 649    int64_t divisor = 0;
 650    int64_t remainder = 0;
 651
 652    if (chain->base.present_mode == VK_PRESENT_MODE_IMMEDIATE_KHR)
 653       options |= XCB_PRESENT_OPTION_ASYNC;
 654
 655    xshmfence_reset(image->shm_fence);
 656
 657    ++chain->send_sbc;
 658    xcb_void_cookie_t cookie =
 659       xcb_present_pixmap(chain->conn,
 660                          chain->window,
 661                          image->pixmap,
 662                          (uint32_t) chain->send_sbc,
 663                          0,                                    /* valid */
 664                          0,                                    /* update */
 665                          0,                                    /* x_off */
 666                          0,                                    /* y_off */
 667                          XCB_NONE,                             /* target_crtc */
 668                          XCB_NONE,
 669                          image->sync_fence,
 670                          options,
 671                          target_msc,
 672                          divisor,
 673                          remainder, 0, NULL);
 674    xcb_discard_reply(chain->conn, cookie.sequence);
 675    image->busy = true;
 676
 677    xcb_flush(chain->conn);
 678
 679    return VK_SUCCESS;
 680 }
 681
 682 static VkResult
 683 x11_image_init(VkDevice device_h, struct x11_swapchain *chain,
 684                const VkSwapchainCreateInfoKHR *pCreateInfo,
 685                const VkAllocationCallbacks* pAllocator,
 686                struct x11_image *image)
 687 {
 688    xcb_void_cookie_t cookie;
 689    VkResult result;
 690    uint32_t row_pitch;
 691    uint32_t offset;
 692    uint32_t bpp = 32;
 693    int fd;
 694    uint32_t size;
 695
 696    result = chain->base.image_fns->create_wsi_image(device_h,
 697                                                     pCreateInfo,
 698                                                     pAllocator,
 699                                                     &image->image,
 700                                                     &image->memory,
 701                                                     &size,
 702                                                     &offset,
 703                                                     &row_pitch,
 704                                                     &fd);
 705    if (result != VK_SUCCESS)
 706       return result;
 707
 708    image->pixmap = xcb_generate_id(chain->conn);
 709
 710    cookie =
 711       xcb_dri3_pixmap_from_buffer_checked(chain->conn,
 712                                           image->pixmap,
 713                                           chain->window,
 714                                           size,
 715                                           pCreateInfo->imageExtent.width,
 716                                           pCreateInfo->imageExtent.height,
 717                                           row_pitch,
 718                                           chain->depth, bpp, fd);
 719    xcb_discard_reply(chain->conn, cookie.sequence);
 720
 721    int fence_fd = xshmfence_alloc_shm();
 722    if (fence_fd < 0)
 723       goto fail_pixmap;
 724
 725    image->shm_fence = xshmfence_map_shm(fence_fd);
 726    if (image->shm_fence == NULL)
 727       goto fail_shmfence_alloc;
 728
 729    image->sync_fence = xcb_generate_id(chain->conn);
 730    xcb_dri3_fence_from_fd(chain->conn,
 731                           image->pixmap,
 732                           image->sync_fence,
 733                           false,
 734                           fence_fd);
 735
 736    image->busy = false;
 737    xshmfence_trigger(image->shm_fence);
 738
 739    return VK_SUCCESS;
 740
 741 fail_shmfence_alloc:
 742    close(fence_fd);
 743
 744 fail_pixmap:
 745    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 746    xcb_discard_reply(chain->conn, cookie.sequence);
 747
 748    chain->base.image_fns->free_wsi_image(device_h, pAllocator,
 749                                         image->image, image->memory);
 750
 751    return result;
 752 }
 753
 754 static void
 755 x11_image_finish(struct x11_swapchain *chain,
 756                  const VkAllocationCallbacks* pAllocator,
 757                  struct x11_image *image)
 758 {
 759    xcb_void_cookie_t cookie;
 760
 761    cookie = xcb_sync_destroy_fence(chain->conn, image->sync_fence);
 762    xcb_discard_reply(chain->conn, cookie.sequence);
 763    xshmfence_unmap_shm(image->shm_fence);
 764
 765    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 766    xcb_discard_reply(chain->conn, cookie.sequence);
 767
 768    chain->base.image_fns->free_wsi_image(chain->base.device, pAllocator,
 769                                         image->image, image->memory);
 770 }
 771
 772 static VkResult
 773 x11_swapchain_destroy(struct wsi_swapchain *anv_chain,
 774                       const VkAllocationCallbacks *pAllocator)
 775 {
 776    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 777    for (uint32_t i = 0; i < chain->image_count; i++)
 778       x11_image_finish(chain, pAllocator, &chain->images[i]);
 779
 780    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 781
 782    vk_free(pAllocator, chain);
 783
 784    return VK_SUCCESS;
 785 }
 786
 787 static VkResult
 788 x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
 789                              VkDevice device,
 790                              struct wsi_device *wsi_device,
 791                              const VkSwapchainCreateInfoKHR *pCreateInfo,
 792                              const VkAllocationCallbacks* pAllocator,
 793                              const struct wsi_image_fns *image_fns,
 794                              struct wsi_swapchain **swapchain_out)
 795 {
 796    struct x11_swapchain *chain;
 797    xcb_void_cookie_t cookie;
 798    VkResult result;
 799
 800    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR);
 801
 802    const unsigned num_images = pCreateInfo->minImageCount;
 803
 804    size_t size = sizeof(*chain) + num_images * sizeof(chain->images[0]);
 805    chain = vk_alloc(pAllocator, size, 8,
 806                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 807    if (chain == NULL)
 808       return VK_ERROR_OUT_OF_HOST_MEMORY;
 809
 810    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 811    xcb_window_t window = x11_surface_get_window(icd_surface);
 812    xcb_get_geometry_reply_t *geometry =
 813       xcb_get_geometry_reply(conn, xcb_get_geometry(conn, window), NULL);
 814
 815    if (geometry == NULL)
 816       return VK_ERROR_SURFACE_LOST_KHR;
 817
 818    chain->base.device = device;
 819    chain->base.destroy = x11_swapchain_destroy;
 820    chain->base.get_images = x11_get_images;
 821    chain->base.acquire_next_image = x11_acquire_next_image;
 822    chain->base.queue_present = x11_queue_present;
 823    chain->base.image_fns = image_fns;
 824    chain->base.present_mode = pCreateInfo->presentMode;
 825    chain->conn = conn;
 826    chain->window = window;
 827    chain->depth = geometry->depth;
 828    chain->extent = pCreateInfo->imageExtent;
 829    chain->image_count = num_images;
 830    chain->send_sbc = 0;
 831
 832    free(geometry);
 833
 834    chain->event_id = xcb_generate_id(chain->conn);
 835    xcb_present_select_input(chain->conn, chain->event_id, chain->window,
 836                             XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
 837                             XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
 838                             XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
 839
 840    /* Create an XCB event queue to hold present events outside of the usual
 841     * application event queue
 842     */
 843    chain->special_event =
 844       xcb_register_for_special_xge(chain->conn, &xcb_present_id,
 845                                    chain->event_id, NULL);
 846
 847    chain->gc = xcb_generate_id(chain->conn);
 848    if (!chain->gc) {
 849       /* FINISHME: Choose a better error. */
 850       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 851       goto fail_register;
 852    }
 853
 854    cookie = xcb_create_gc(chain->conn,
 855                           chain->gc,
 856                           chain->window,
 857                           XCB_GC_GRAPHICS_EXPOSURES,
 858                           (uint32_t []) { 0 });
 859    xcb_discard_reply(chain->conn, cookie.sequence);
 860
 861    uint32_t image = 0;
 862    for (; image < chain->image_count; image++) {
 863       result = x11_image_init(device, chain, pCreateInfo, pAllocator,
 864                               &chain->images[image]);
 865       if (result != VK_SUCCESS)
 866          goto fail_init_images;
 867    }
 868
 869    *swapchain_out = &chain->base;
 870
 871    return VK_SUCCESS;
 872
 873 fail_init_images:
 874    for (uint32_t j = 0; j < image; j++)
 875       x11_image_finish(chain, pAllocator, &chain->images[j]);
 876
 877 fail_register:
 878    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 879
 880    vk_free(pAllocator, chain);
 881
 882    return result;
 883 }
 884
 885 VkResult
 886 wsi_x11_init_wsi(struct wsi_device *wsi_device,
 887                  const VkAllocationCallbacks *alloc)
 888 {
 889    struct wsi_x11 *wsi;
 890    VkResult result;
 891
 892    wsi = vk_alloc(alloc, sizeof(*wsi), 8,
 893                    VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
 894    if (!wsi) {
 895       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 896       goto fail;
 897    }
 898
 899    int ret = pthread_mutex_init(&wsi->mutex, NULL);
 900    if (ret != 0) {
 901       if (ret == ENOMEM) {
 902          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 903       } else {
 904          /* FINISHME: Choose a better error. */
 905          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 906       }
 907
 908       goto fail_alloc;
 909    }
 910
 911    wsi->connections = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
 912                                               _mesa_key_pointer_equal);
 913    if (!wsi->connections) {
 914       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 915       goto fail_mutex;
 916    }
 917
 918    wsi->base.get_support = x11_surface_get_support;
 919    wsi->base.get_capabilities = x11_surface_get_capabilities;
 920    wsi->base.get_formats = x11_surface_get_formats;
 921    wsi->base.get_present_modes = x11_surface_get_present_modes;
 922    wsi->base.create_swapchain = x11_surface_create_swapchain;
 923
 924    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = &wsi->base;
 925    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = &wsi->base;
 926
 927    return VK_SUCCESS;
 928
 929 fail_mutex:
 930    pthread_mutex_destroy(&wsi->mutex);
 931 fail_alloc:
 932    vk_free(alloc, wsi);
 933 fail:
 934    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = NULL;
 935    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = NULL;
 936
 937    return result;
 938 }
 939
 940 void
 941 wsi_x11_finish_wsi(struct wsi_device *wsi_device,
 942                    const VkAllocationCallbacks *alloc)
 943 {
 944    struct wsi_x11 *wsi =
 945       (struct wsi_x11 *)wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB];
 946
 947    if (wsi) {
 948       struct hash_entry *entry;
 949       hash_table_foreach(wsi->connections, entry)
 950          wsi_x11_connection_destroy(alloc, entry->data);
 951
 952       _mesa_hash_table_destroy(wsi->connections, NULL);
 953
 954       pthread_mutex_destroy(&wsi->mutex);
 955
 956       vk_free(alloc, wsi);
 957    }
 958 }