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
 122       pthread_mutex_lock(&wsi->mutex);
 123
 124       entry = _mesa_hash_table_search(wsi->connections, conn);
 125       if (entry) {
 126          /* Oops, someone raced us to it */
 127          wsi_x11_connection_destroy(alloc, wsi_conn);
 128       } else {
 129          entry = _mesa_hash_table_insert(wsi->connections, conn, wsi_conn);
 130       }
 131    }
 132
 133    pthread_mutex_unlock(&wsi->mutex);
 134
 135    return entry->data;
 136 }
 137
 138 static const VkSurfaceFormatKHR formats[] = {
 139    { .format = VK_FORMAT_B8G8R8A8_SRGB, },
 140    { .format = VK_FORMAT_B8G8R8A8_UNORM, },
 141 };
 142
 143 static const VkPresentModeKHR present_modes[] = {
 144    VK_PRESENT_MODE_IMMEDIATE_KHR,
 145    VK_PRESENT_MODE_MAILBOX_KHR,
 146 };
 147
 148 static xcb_screen_t *
 149 get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
 150 {
 151    xcb_screen_iterator_t screen_iter =
 152       xcb_setup_roots_iterator(xcb_get_setup(conn));
 153
 154    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 155       if (screen_iter.data->root == root)
 156          return screen_iter.data;
 157    }
 158
 159    return NULL;
 160 }
 161
 162 static xcb_visualtype_t *
 163 screen_get_visualtype(xcb_screen_t *screen, xcb_visualid_t visual_id,
 164                       unsigned *depth)
 165 {
 166    xcb_depth_iterator_t depth_iter =
 167       xcb_screen_allowed_depths_iterator(screen);
 168
 169    for (; depth_iter.rem; xcb_depth_next (&depth_iter)) {
 170       xcb_visualtype_iterator_t visual_iter =
 171          xcb_depth_visuals_iterator (depth_iter.data);
 172
 173       for (; visual_iter.rem; xcb_visualtype_next (&visual_iter)) {
 174          if (visual_iter.data->visual_id == visual_id) {
 175             if (depth)
 176                *depth = depth_iter.data->depth;
 177             return visual_iter.data;
 178          }
 179       }
 180    }
 181
 182    return NULL;
 183 }
 184
 185 static xcb_visualtype_t *
 186 connection_get_visualtype(xcb_connection_t *conn, xcb_visualid_t visual_id,
 187                           unsigned *depth)
 188 {
 189    xcb_screen_iterator_t screen_iter =
 190       xcb_setup_roots_iterator(xcb_get_setup(conn));
 191
 192    /* For this we have to iterate over all of the screens which is rather
 193     * annoying.  Fortunately, there is probably only 1.
 194     */
 195    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 196       xcb_visualtype_t *visual = screen_get_visualtype(screen_iter.data,
 197                                                        visual_id, depth);
 198       if (visual)
 199          return visual;
 200    }
 201
 202    return NULL;
 203 }
 204
 205 static xcb_visualtype_t *
 206 get_visualtype_for_window(xcb_connection_t *conn, xcb_window_t window,
 207                           unsigned *depth)
 208 {
 209    xcb_query_tree_cookie_t tree_cookie;
 210    xcb_get_window_attributes_cookie_t attrib_cookie;
 211    xcb_query_tree_reply_t *tree;
 212    xcb_get_window_attributes_reply_t *attrib;
 213
 214    tree_cookie = xcb_query_tree(conn, window);
 215    attrib_cookie = xcb_get_window_attributes(conn, window);
 216
 217    tree = xcb_query_tree_reply(conn, tree_cookie, NULL);
 218    attrib = xcb_get_window_attributes_reply(conn, attrib_cookie, NULL);
 219    if (attrib == NULL || tree == NULL) {
 220       free(attrib);
 221       free(tree);
 222       return NULL;
 223    }
 224
 225    xcb_window_t root = tree->root;
 226    xcb_visualid_t visual_id = attrib->visual;
 227    free(attrib);
 228    free(tree);
 229
 230    xcb_screen_t *screen = get_screen_for_root(conn, root);
 231    if (screen == NULL)
 232       return NULL;
 233
 234    return screen_get_visualtype(screen, visual_id, depth);
 235 }
 236
 237 static bool
 238 visual_has_alpha(xcb_visualtype_t *visual, unsigned depth)
 239 {
 240    uint32_t rgb_mask = visual->red_mask |
 241                        visual->green_mask |
 242                        visual->blue_mask;
 243
 244    uint32_t all_mask = 0xffffffff >> (32 - depth);
 245
 246    /* Do we have bits left over after RGB? */
 247    return (all_mask & ~rgb_mask) != 0;
 248 }
 249
 250 VkBool32 wsi_get_physical_device_xcb_presentation_support(
 251     struct wsi_device *wsi_device,
 252     VkAllocationCallbacks *alloc,
 253     uint32_t                                    queueFamilyIndex,
 254     xcb_connection_t*                           connection,
 255     xcb_visualid_t                              visual_id)
 256 {
 257    struct wsi_x11_connection *wsi_conn =
 258       wsi_x11_get_connection(wsi_device, alloc, connection);
 259
 260    if (!wsi_conn->has_dri3) {
 261       fprintf(stderr, "vulkan: No DRI3 support\n");
 262       return false;
 263    }
 264
 265    unsigned visual_depth;
 266    if (!connection_get_visualtype(connection, visual_id, &visual_depth))
 267       return false;
 268
 269    if (visual_depth != 24 && visual_depth != 32)
 270       return false;
 271
 272    return true;
 273 }
 274
 275 static xcb_connection_t*
 276 x11_surface_get_connection(VkIcdSurfaceBase *icd_surface)
 277 {
 278    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 279       return XGetXCBConnection(((VkIcdSurfaceXlib *)icd_surface)->dpy);
 280    else
 281       return ((VkIcdSurfaceXcb *)icd_surface)->connection;
 282 }
 283
 284 static xcb_window_t
 285 x11_surface_get_window(VkIcdSurfaceBase *icd_surface)
 286 {
 287    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 288       return ((VkIcdSurfaceXlib *)icd_surface)->window;
 289    else
 290       return ((VkIcdSurfaceXcb *)icd_surface)->window;
 291 }
 292
 293 static VkResult
 294 x11_surface_get_support(VkIcdSurfaceBase *icd_surface,
 295                         struct wsi_device *wsi_device,
 296                         const VkAllocationCallbacks *alloc,
 297                         uint32_t queueFamilyIndex,
 298                         VkBool32* pSupported)
 299 {
 300    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 301    xcb_window_t window = x11_surface_get_window(icd_surface);
 302
 303    struct wsi_x11_connection *wsi_conn =
 304       wsi_x11_get_connection(wsi_device, alloc, conn);
 305    if (!wsi_conn)
 306       return VK_ERROR_OUT_OF_HOST_MEMORY;
 307
 308    if (!wsi_conn->has_dri3) {
 309       fprintf(stderr, "vulkan: No DRI3 support\n");
 310       *pSupported = false;
 311       return VK_SUCCESS;
 312    }
 313
 314    unsigned visual_depth;
 315    if (!get_visualtype_for_window(conn, window, &visual_depth)) {
 316       *pSupported = false;
 317       return VK_SUCCESS;
 318    }
 319
 320    if (visual_depth != 24 && visual_depth != 32) {
 321       *pSupported = false;
 322       return VK_SUCCESS;
 323    }
 324
 325    *pSupported = true;
 326    return VK_SUCCESS;
 327 }
 328
 329 static VkResult
 330 x11_surface_get_capabilities(VkIcdSurfaceBase *icd_surface,
 331                              VkSurfaceCapabilitiesKHR *caps)
 332 {
 333    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 334    xcb_window_t window = x11_surface_get_window(icd_surface);
 335    xcb_get_geometry_cookie_t geom_cookie;
 336    xcb_generic_error_t *err;
 337    xcb_get_geometry_reply_t *geom;
 338    unsigned visual_depth;
 339
 340    geom_cookie = xcb_get_geometry(conn, window);
 341
 342    /* This does a round-trip.  This is why we do get_geometry first and
 343     * wait to read the reply until after we have a visual.
 344     */
 345    xcb_visualtype_t *visual =
 346       get_visualtype_for_window(conn, window, &visual_depth);
 347
 348    geom = xcb_get_geometry_reply(conn, geom_cookie, &err);
 349    if (geom) {
 350       VkExtent2D extent = { geom->width, geom->height };
 351       caps->currentExtent = extent;
 352       caps->minImageExtent = extent;
 353       caps->maxImageExtent = extent;
 354    } else {
 355       /* This can happen if the client didn't wait for the configure event
 356        * to come back from the compositor.  In that case, we don't know the
 357        * size of the window so we just return valid "I don't know" stuff.
 358        */
 359       caps->currentExtent = (VkExtent2D) { -1, -1 };
 360       caps->minImageExtent = (VkExtent2D) { 1, 1 };
 361       caps->maxImageExtent = (VkExtent2D) { INT16_MAX, INT16_MAX };
 362    }
 363    free(err);
 364    free(geom);
 365
 366    if (visual_has_alpha(visual, visual_depth)) {
 367       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 368                                       VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR;
 369    } else {
 370       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 371                                       VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 372    }
 373
 374    caps->minImageCount = 2;
 375    caps->maxImageCount = 4;
 376    caps->supportedTransforms = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 377    caps->currentTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 378    caps->maxImageArrayLayers = 1;
 379    caps->supportedUsageFlags =
 380       VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
 381       VK_IMAGE_USAGE_SAMPLED_BIT |
 382       VK_IMAGE_USAGE_TRANSFER_DST_BIT |
 383       VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 384
 385    return VK_SUCCESS;
 386 }
 387
 388 static VkResult
 389 x11_surface_get_formats(VkIcdSurfaceBase *surface,
 390                         struct wsi_device *wsi_device,
 391                         uint32_t *pSurfaceFormatCount,
 392                         VkSurfaceFormatKHR *pSurfaceFormats)
 393 {
 394    if (pSurfaceFormats == NULL) {
 395       *pSurfaceFormatCount = ARRAY_SIZE(formats);
 396       return VK_SUCCESS;
 397    }
 398
 399    VkResult result = VK_SUCCESS;
 400
 401    if (*pSurfaceFormatCount > ARRAY_SIZE(formats))
 402       *pSurfaceFormatCount = ARRAY_SIZE(formats);
 403    else if (*pSurfaceFormatCount < ARRAY_SIZE(formats))
 404       result = VK_INCOMPLETE;
 405
 406    typed_memcpy(pSurfaceFormats, formats, *pSurfaceFormatCount);
 407
 408    return result;
 409 }
 410
 411 static VkResult
 412 x11_surface_get_present_modes(VkIcdSurfaceBase *surface,
 413                               uint32_t *pPresentModeCount,
 414                               VkPresentModeKHR *pPresentModes)
 415 {
 416    if (pPresentModes == NULL) {
 417       *pPresentModeCount = ARRAY_SIZE(present_modes);
 418       return VK_SUCCESS;
 419    }
 420
 421    *pPresentModeCount = MIN2(*pPresentModeCount, ARRAY_SIZE(present_modes));
 422    typed_memcpy(pPresentModes, present_modes, *pPresentModeCount);
 423
 424    return *pPresentModeCount < ARRAY_SIZE(present_modes) ?
 425       VK_INCOMPLETE : VK_SUCCESS;
 426 }
 427
 428 VkResult wsi_create_xcb_surface(const VkAllocationCallbacks *pAllocator,
 429                                 const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
 430                                 VkSurfaceKHR *pSurface)
 431 {
 432    VkIcdSurfaceXcb *surface;
 433
 434    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 435                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 436    if (surface == NULL)
 437       return VK_ERROR_OUT_OF_HOST_MEMORY;
 438
 439    surface->base.platform = VK_ICD_WSI_PLATFORM_XCB;
 440    surface->connection = pCreateInfo->connection;
 441    surface->window = pCreateInfo->window;
 442
 443    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 444    return VK_SUCCESS;
 445 }
 446
 447 VkResult wsi_create_xlib_surface(const VkAllocationCallbacks *pAllocator,
 448                                  const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
 449                                  VkSurfaceKHR *pSurface)
 450 {
 451    VkIcdSurfaceXlib *surface;
 452
 453    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 454                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 455    if (surface == NULL)
 456       return VK_ERROR_OUT_OF_HOST_MEMORY;
 457
 458    surface->base.platform = VK_ICD_WSI_PLATFORM_XLIB;
 459    surface->dpy = pCreateInfo->dpy;
 460    surface->window = pCreateInfo->window;
 461
 462    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 463    return VK_SUCCESS;
 464 }
 465
 466 struct x11_image {
 467    VkImage image;
 468    VkDeviceMemory memory;
 469    xcb_pixmap_t                              pixmap;
 470    bool                                      busy;
 471    struct xshmfence *                        shm_fence;
 472    uint32_t                                  sync_fence;
 473 };
 474
 475 struct x11_swapchain {
 476    struct wsi_swapchain                        base;
 477
 478    xcb_connection_t *                           conn;
 479    xcb_window_t                                 window;
 480    xcb_gc_t                                     gc;
 481    uint32_t                                     depth;
 482    VkExtent2D                                   extent;
 483    uint32_t                                     image_count;
 484
 485    xcb_present_event_t                          event_id;
 486    xcb_special_event_t *                        special_event;
 487    uint64_t                                     send_sbc;
 488    uint32_t                                     stamp;
 489
 490    struct x11_image                             images[0];
 491 };
 492
 493 static VkResult
 494 x11_get_images(struct wsi_swapchain *anv_chain,
 495                uint32_t* pCount, VkImage *pSwapchainImages)
 496 {
 497    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 498
 499    if (pSwapchainImages == NULL) {
 500       *pCount = chain->image_count;
 501       return VK_SUCCESS;
 502    }
 503
 504    assert(chain->image_count <= *pCount);
 505    for (uint32_t i = 0; i < chain->image_count; i++)
 506       pSwapchainImages[i] = chain->images[i].image;
 507
 508    *pCount = chain->image_count;
 509
 510    return VK_SUCCESS;
 511 }
 512
 513 static VkResult
 514 x11_handle_dri3_present_event(struct x11_swapchain *chain,
 515                               xcb_present_generic_event_t *event)
 516 {
 517    switch (event->evtype) {
 518    case XCB_PRESENT_CONFIGURE_NOTIFY: {
 519       xcb_present_configure_notify_event_t *config = (void *) event;
 520
 521       if (config->width != chain->extent.width ||
 522           config->height != chain->extent.height)
 523          return VK_ERROR_OUT_OF_DATE_KHR;
 524
 525       break;
 526    }
 527
 528    case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
 529       xcb_present_idle_notify_event_t *idle = (void *) event;
 530
 531       for (unsigned i = 0; i < chain->image_count; i++) {
 532          if (chain->images[i].pixmap == idle->pixmap) {
 533             chain->images[i].busy = false;
 534             break;
 535          }
 536       }
 537
 538       break;
 539    }
 540
 541    case XCB_PRESENT_COMPLETE_NOTIFY:
 542    default:
 543       break;
 544    }
 545
 546    return VK_SUCCESS;
 547 }
 548
 549
 550 static uint64_t wsi_get_current_time(void)
 551 {
 552    uint64_t current_time;
 553    struct timespec tv;
 554
 555    clock_gettime(CLOCK_MONOTONIC, &tv);
 556    current_time = tv.tv_nsec + tv.tv_sec*1000000000ull;
 557    return current_time;
 558 }
 559
 560 static uint64_t wsi_get_absolute_timeout(uint64_t timeout)
 561 {
 562    uint64_t current_time = wsi_get_current_time();
 563
 564    timeout = MIN2(UINT64_MAX - current_time, timeout);
 565
 566    return current_time + timeout;
 567 }
 568
 569 static VkResult
 570 x11_acquire_next_image(struct wsi_swapchain *anv_chain,
 571                        uint64_t timeout,
 572                        VkSemaphore semaphore,
 573                        uint32_t *image_index)
 574 {
 575    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 576    xcb_generic_event_t *event;
 577    struct pollfd pfds;
 578    uint64_t atimeout;
 579    while (1) {
 580       for (uint32_t i = 0; i < chain->image_count; i++) {
 581          if (!chain->images[i].busy) {
 582             /* We found a non-busy image */
 583             xshmfence_await(chain->images[i].shm_fence);
 584             *image_index = i;
 585             chain->images[i].busy = true;
 586             return VK_SUCCESS;
 587          }
 588       }
 589
 590       xcb_flush(chain->conn);
 591
 592       if (timeout == UINT64_MAX) {
 593          event = xcb_wait_for_special_event(chain->conn, chain->special_event);
 594          if (!event)
 595             return VK_ERROR_OUT_OF_DATE_KHR;
 596       } else {
 597          event = xcb_poll_for_special_event(chain->conn, chain->special_event);
 598          if (!event) {
 599             int ret;
 600             if (timeout == 0)
 601                return VK_NOT_READY;
 602
 603             atimeout = wsi_get_absolute_timeout(timeout);
 604
 605             pfds.fd = xcb_get_file_descriptor(chain->conn);
 606             pfds.events = POLLIN;
 607             ret = poll(&pfds, 1, timeout / 1000 / 1000);
 608             if (ret == 0)
 609                return VK_TIMEOUT;
 610             if (ret == -1)
 611                return VK_ERROR_OUT_OF_DATE_KHR;
 612
 613             /* If a non-special event happens, the fd will still
 614              * poll. So recalculate the timeout now just in case.
 615              */
 616             uint64_t current_time = wsi_get_current_time();
 617             if (atimeout > current_time)
 618                timeout = atimeout - current_time;
 619             else
 620                timeout = 0;
 621             continue;
 622          }
 623       }
 624
 625       VkResult result = x11_handle_dri3_present_event(chain, (void *)event);
 626       free(event);
 627       if (result != VK_SUCCESS)
 628          return result;
 629    }
 630 }
 631
 632 static VkResult
 633 x11_queue_present(struct wsi_swapchain *anv_chain,
 634                   uint32_t image_index)
 635 {
 636    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 637    struct x11_image *image = &chain->images[image_index];
 638
 639    assert(image_index < chain->image_count);
 640
 641    uint32_t options = XCB_PRESENT_OPTION_NONE;
 642
 643    int64_t target_msc = 0;
 644    int64_t divisor = 0;
 645    int64_t remainder = 0;
 646
 647    if (chain->base.present_mode == VK_PRESENT_MODE_IMMEDIATE_KHR)
 648       options |= XCB_PRESENT_OPTION_ASYNC;
 649
 650    xshmfence_reset(image->shm_fence);
 651
 652    ++chain->send_sbc;
 653    xcb_void_cookie_t cookie =
 654       xcb_present_pixmap(chain->conn,
 655                          chain->window,
 656                          image->pixmap,
 657                          (uint32_t) chain->send_sbc,
 658                          0,                                    /* valid */
 659                          0,                                    /* update */
 660                          0,                                    /* x_off */
 661                          0,                                    /* y_off */
 662                          XCB_NONE,                             /* target_crtc */
 663                          XCB_NONE,
 664                          image->sync_fence,
 665                          options,
 666                          target_msc,
 667                          divisor,
 668                          remainder, 0, NULL);
 669    xcb_discard_reply(chain->conn, cookie.sequence);
 670    image->busy = true;
 671
 672    xcb_flush(chain->conn);
 673
 674    return VK_SUCCESS;
 675 }
 676
 677 static VkResult
 678 x11_image_init(VkDevice device_h, struct x11_swapchain *chain,
 679                const VkSwapchainCreateInfoKHR *pCreateInfo,
 680                const VkAllocationCallbacks* pAllocator,
 681                struct x11_image *image)
 682 {
 683    xcb_void_cookie_t cookie;
 684    VkResult result;
 685    uint32_t row_pitch;
 686    uint32_t offset;
 687    uint32_t bpp = 32;
 688    int fd;
 689    uint32_t size;
 690
 691    result = chain->base.image_fns->create_wsi_image(device_h,
 692                                                     pCreateInfo,
 693                                                     pAllocator,
 694                                                     &image->image,
 695                                                     &image->memory,
 696                                                     &size,
 697                                                     &offset,
 698                                                     &row_pitch,
 699                                                     &fd);
 700    if (result != VK_SUCCESS)
 701       return result;
 702
 703    image->pixmap = xcb_generate_id(chain->conn);
 704
 705    cookie =
 706       xcb_dri3_pixmap_from_buffer_checked(chain->conn,
 707                                           image->pixmap,
 708                                           chain->window,
 709                                           size,
 710                                           pCreateInfo->imageExtent.width,
 711                                           pCreateInfo->imageExtent.height,
 712                                           row_pitch,
 713                                           chain->depth, bpp, fd);
 714    xcb_discard_reply(chain->conn, cookie.sequence);
 715
 716    int fence_fd = xshmfence_alloc_shm();
 717    if (fence_fd < 0)
 718       goto fail_pixmap;
 719
 720    image->shm_fence = xshmfence_map_shm(fence_fd);
 721    if (image->shm_fence == NULL)
 722       goto fail_shmfence_alloc;
 723
 724    image->sync_fence = xcb_generate_id(chain->conn);
 725    xcb_dri3_fence_from_fd(chain->conn,
 726                           image->pixmap,
 727                           image->sync_fence,
 728                           false,
 729                           fence_fd);
 730
 731    image->busy = false;
 732    xshmfence_trigger(image->shm_fence);
 733
 734    return VK_SUCCESS;
 735
 736 fail_shmfence_alloc:
 737    close(fence_fd);
 738
 739 fail_pixmap:
 740    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 741    xcb_discard_reply(chain->conn, cookie.sequence);
 742
 743    chain->base.image_fns->free_wsi_image(device_h, pAllocator,
 744                                         image->image, image->memory);
 745
 746    return result;
 747 }
 748
 749 static void
 750 x11_image_finish(struct x11_swapchain *chain,
 751                  const VkAllocationCallbacks* pAllocator,
 752                  struct x11_image *image)
 753 {
 754    xcb_void_cookie_t cookie;
 755
 756    cookie = xcb_sync_destroy_fence(chain->conn, image->sync_fence);
 757    xcb_discard_reply(chain->conn, cookie.sequence);
 758    xshmfence_unmap_shm(image->shm_fence);
 759
 760    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 761    xcb_discard_reply(chain->conn, cookie.sequence);
 762
 763    chain->base.image_fns->free_wsi_image(chain->base.device, pAllocator,
 764                                         image->image, image->memory);
 765 }
 766
 767 static VkResult
 768 x11_swapchain_destroy(struct wsi_swapchain *anv_chain,
 769                       const VkAllocationCallbacks *pAllocator)
 770 {
 771    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 772    for (uint32_t i = 0; i < chain->image_count; i++)
 773       x11_image_finish(chain, pAllocator, &chain->images[i]);
 774
 775    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 776
 777    vk_free(pAllocator, chain);
 778
 779    return VK_SUCCESS;
 780 }
 781
 782 static VkResult
 783 x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
 784                              VkDevice device,
 785                              struct wsi_device *wsi_device,
 786                              const VkSwapchainCreateInfoKHR *pCreateInfo,
 787                              const VkAllocationCallbacks* pAllocator,
 788                              const struct wsi_image_fns *image_fns,
 789                              struct wsi_swapchain **swapchain_out)
 790 {
 791    struct x11_swapchain *chain;
 792    xcb_void_cookie_t cookie;
 793    VkResult result;
 794
 795    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR);
 796
 797    int num_images = pCreateInfo->minImageCount;
 798
 799    /* For true mailbox mode, we need at least 4 images:
 800     *  1) One to scan out from
 801     *  2) One to have queued for scan-out
 802     *  3) One to be currently held by the Wayland compositor
 803     *  4) One to render to
 804     */
 805    if (pCreateInfo->presentMode == VK_PRESENT_MODE_MAILBOX_KHR)
 806       num_images = MAX2(num_images, 4);
 807
 808    size_t size = sizeof(*chain) + num_images * sizeof(chain->images[0]);
 809    chain = vk_alloc(pAllocator, size, 8,
 810                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 811    if (chain == NULL)
 812       return VK_ERROR_OUT_OF_HOST_MEMORY;
 813
 814    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 815    xcb_window_t window = x11_surface_get_window(icd_surface);
 816    xcb_get_geometry_reply_t *geometry =
 817       xcb_get_geometry_reply(conn, xcb_get_geometry(conn, window), NULL);
 818
 819    if (geometry == NULL)
 820       return VK_ERROR_SURFACE_LOST_KHR;
 821
 822    chain->base.device = device;
 823    chain->base.destroy = x11_swapchain_destroy;
 824    chain->base.get_images = x11_get_images;
 825    chain->base.acquire_next_image = x11_acquire_next_image;
 826    chain->base.queue_present = x11_queue_present;
 827    chain->base.image_fns = image_fns;
 828    chain->base.present_mode = pCreateInfo->presentMode;
 829    chain->conn = conn;
 830    chain->window = window;
 831    chain->depth = geometry->depth;
 832    chain->extent = pCreateInfo->imageExtent;
 833    chain->image_count = num_images;
 834    chain->send_sbc = 0;
 835
 836    free(geometry);
 837
 838    chain->event_id = xcb_generate_id(chain->conn);
 839    xcb_present_select_input(chain->conn, chain->event_id, chain->window,
 840                             XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
 841                             XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
 842                             XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
 843
 844    /* Create an XCB event queue to hold present events outside of the usual
 845     * application event queue
 846     */
 847    chain->special_event =
 848       xcb_register_for_special_xge(chain->conn, &xcb_present_id,
 849                                    chain->event_id, NULL);
 850
 851    chain->gc = xcb_generate_id(chain->conn);
 852    if (!chain->gc) {
 853       /* FINISHME: Choose a better error. */
 854       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 855       goto fail_register;
 856    }
 857
 858    cookie = xcb_create_gc(chain->conn,
 859                           chain->gc,
 860                           chain->window,
 861                           XCB_GC_GRAPHICS_EXPOSURES,
 862                           (uint32_t []) { 0 });
 863    xcb_discard_reply(chain->conn, cookie.sequence);
 864
 865    uint32_t image = 0;
 866    for (; image < chain->image_count; image++) {
 867       result = x11_image_init(device, chain, pCreateInfo, pAllocator,
 868                               &chain->images[image]);
 869       if (result != VK_SUCCESS)
 870          goto fail_init_images;
 871    }
 872
 873    *swapchain_out = &chain->base;
 874
 875    return VK_SUCCESS;
 876
 877 fail_init_images:
 878    for (uint32_t j = 0; j < image; j++)
 879       x11_image_finish(chain, pAllocator, &chain->images[j]);
 880
 881 fail_register:
 882    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 883
 884    vk_free(pAllocator, chain);
 885
 886    return result;
 887 }
 888
 889 VkResult
 890 wsi_x11_init_wsi(struct wsi_device *wsi_device,
 891                  const VkAllocationCallbacks *alloc)
 892 {
 893    struct wsi_x11 *wsi;
 894    VkResult result;
 895
 896    wsi = vk_alloc(alloc, sizeof(*wsi), 8,
 897                    VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
 898    if (!wsi) {
 899       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 900       goto fail;
 901    }
 902
 903    int ret = pthread_mutex_init(&wsi->mutex, NULL);
 904    if (ret != 0) {
 905       if (ret == ENOMEM) {
 906          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 907       } else {
 908          /* FINISHME: Choose a better error. */
 909          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 910       }
 911
 912       goto fail_alloc;
 913    }
 914
 915    wsi->connections = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
 916                                               _mesa_key_pointer_equal);
 917    if (!wsi->connections) {
 918       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 919       goto fail_mutex;
 920    }
 921
 922    wsi->base.get_support = x11_surface_get_support;
 923    wsi->base.get_capabilities = x11_surface_get_capabilities;
 924    wsi->base.get_formats = x11_surface_get_formats;
 925    wsi->base.get_present_modes = x11_surface_get_present_modes;
 926    wsi->base.create_swapchain = x11_surface_create_swapchain;
 927
 928    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = &wsi->base;
 929    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = &wsi->base;
 930
 931    return VK_SUCCESS;
 932
 933 fail_mutex:
 934    pthread_mutex_destroy(&wsi->mutex);
 935 fail_alloc:
 936    vk_free(alloc, wsi);
 937 fail:
 938    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = NULL;
 939    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = NULL;
 940
 941    return result;
 942 }
 943
 944 void
 945 wsi_x11_finish_wsi(struct wsi_device *wsi_device,
 946                    const VkAllocationCallbacks *alloc)
 947 {
 948    struct wsi_x11 *wsi =
 949       (struct wsi_x11 *)wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB];
 950
 951    if (wsi) {
 952       _mesa_hash_table_destroy(wsi->connections, NULL);
 953
 954       pthread_mutex_destroy(&wsi->mutex);
 955
 956       vk_free(alloc, wsi);
 957    }
 958 }