src/intel/vulkan/anv_wsi_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 "anv_wsi.h"
  31
  32 #include "vk_format_info.h"
  33 #include "util/hash_table.h"
  34
  35 struct wsi_x11_connection {
  36    bool has_dri3;
  37    bool has_present;
  38 };
  39
  40 struct wsi_x11 {
  41    struct anv_wsi_interface base;
  42
  43    pthread_mutex_t                              mutex;
  44    /* Hash table of xcb_connection -> wsi_x11_connection mappings */
  45    struct hash_table *connections;
  46 };
  47
  48 static struct wsi_x11_connection *
  49 wsi_x11_connection_create(const VkAllocationCallbacks *alloc,
  50                           xcb_connection_t *conn)
  51 {
  52    xcb_query_extension_cookie_t dri3_cookie, pres_cookie;
  53    xcb_query_extension_reply_t *dri3_reply, *pres_reply;
  54
  55    struct wsi_x11_connection *wsi_conn =
  56       vk_alloc(alloc, sizeof(*wsi_conn), 8,
  57                 VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
  58    if (!wsi_conn)
  59       return NULL;
  60
  61    dri3_cookie = xcb_query_extension(conn, 4, "DRI3");
  62    pres_cookie = xcb_query_extension(conn, 7, "PRESENT");
  63
  64    dri3_reply = xcb_query_extension_reply(conn, dri3_cookie, NULL);
  65    pres_reply = xcb_query_extension_reply(conn, pres_cookie, NULL);
  66    if (dri3_reply == NULL || pres_reply == NULL) {
  67       free(dri3_reply);
  68       free(pres_reply);
  69       vk_free(alloc, wsi_conn);
  70       return NULL;
  71    }
  72
  73    wsi_conn->has_dri3 = dri3_reply->present != 0;
  74    wsi_conn->has_present = pres_reply->present != 0;
  75
  76    free(dri3_reply);
  77    free(pres_reply);
  78
  79    return wsi_conn;
  80 }
  81
  82 static void
  83 wsi_x11_connection_destroy(const VkAllocationCallbacks *alloc,
  84                            struct wsi_x11_connection *conn)
  85 {
  86    vk_free(alloc, conn);
  87 }
  88
  89 static struct wsi_x11_connection *
  90 wsi_x11_get_connection(struct anv_wsi_device *wsi_dev,
  91                        const VkAllocationCallbacks *alloc,
  92                        xcb_connection_t *conn)
  93 {
  94    struct wsi_x11 *wsi =
  95       (struct wsi_x11 *)wsi_dev->wsi[VK_ICD_WSI_PLATFORM_XCB];
  96
  97    pthread_mutex_lock(&wsi->mutex);
  98
  99    struct hash_entry *entry = _mesa_hash_table_search(wsi->connections, conn);
 100    if (!entry) {
 101       /* We're about to make a bunch of blocking calls.  Let's drop the
 102        * mutex for now so we don't block up too badly.
 103        */
 104       pthread_mutex_unlock(&wsi->mutex);
 105
 106       struct wsi_x11_connection *wsi_conn =
 107          wsi_x11_connection_create(alloc, conn);
 108
 109       pthread_mutex_lock(&wsi->mutex);
 110
 111       entry = _mesa_hash_table_search(wsi->connections, conn);
 112       if (entry) {
 113          /* Oops, someone raced us to it */
 114          wsi_x11_connection_destroy(alloc, wsi_conn);
 115       } else {
 116          entry = _mesa_hash_table_insert(wsi->connections, conn, wsi_conn);
 117       }
 118    }
 119
 120    pthread_mutex_unlock(&wsi->mutex);
 121
 122    return entry->data;
 123 }
 124
 125 static const VkSurfaceFormatKHR formats[] = {
 126    { .format = VK_FORMAT_B8G8R8A8_SRGB, },
 127    { .format = VK_FORMAT_B8G8R8A8_UNORM, },
 128 };
 129
 130 static const VkPresentModeKHR present_modes[] = {
 131    VK_PRESENT_MODE_MAILBOX_KHR,
 132 };
 133
 134 static xcb_screen_t *
 135 get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
 136 {
 137    xcb_screen_iterator_t screen_iter =
 138       xcb_setup_roots_iterator(xcb_get_setup(conn));
 139
 140    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 141       if (screen_iter.data->root == root)
 142          return screen_iter.data;
 143    }
 144
 145    return NULL;
 146 }
 147
 148 static xcb_visualtype_t *
 149 screen_get_visualtype(xcb_screen_t *screen, xcb_visualid_t visual_id,
 150                       unsigned *depth)
 151 {
 152    xcb_depth_iterator_t depth_iter =
 153       xcb_screen_allowed_depths_iterator(screen);
 154
 155    for (; depth_iter.rem; xcb_depth_next (&depth_iter)) {
 156       xcb_visualtype_iterator_t visual_iter =
 157          xcb_depth_visuals_iterator (depth_iter.data);
 158
 159       for (; visual_iter.rem; xcb_visualtype_next (&visual_iter)) {
 160          if (visual_iter.data->visual_id == visual_id) {
 161             if (depth)
 162                *depth = depth_iter.data->depth;
 163             return visual_iter.data;
 164          }
 165       }
 166    }
 167
 168    return NULL;
 169 }
 170
 171 static xcb_visualtype_t *
 172 connection_get_visualtype(xcb_connection_t *conn, xcb_visualid_t visual_id,
 173                           unsigned *depth)
 174 {
 175    xcb_screen_iterator_t screen_iter =
 176       xcb_setup_roots_iterator(xcb_get_setup(conn));
 177
 178    /* For this we have to iterate over all of the screens which is rather
 179     * annoying.  Fortunately, there is probably only 1.
 180     */
 181    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 182       xcb_visualtype_t *visual = screen_get_visualtype(screen_iter.data,
 183                                                        visual_id, depth);
 184       if (visual)
 185          return visual;
 186    }
 187
 188    return NULL;
 189 }
 190
 191 static xcb_visualtype_t *
 192 get_visualtype_for_window(xcb_connection_t *conn, xcb_window_t window,
 193                           unsigned *depth)
 194 {
 195    xcb_query_tree_cookie_t tree_cookie;
 196    xcb_get_window_attributes_cookie_t attrib_cookie;
 197    xcb_query_tree_reply_t *tree;
 198    xcb_get_window_attributes_reply_t *attrib;
 199
 200    tree_cookie = xcb_query_tree(conn, window);
 201    attrib_cookie = xcb_get_window_attributes(conn, window);
 202
 203    tree = xcb_query_tree_reply(conn, tree_cookie, NULL);
 204    attrib = xcb_get_window_attributes_reply(conn, attrib_cookie, NULL);
 205    if (attrib == NULL || tree == NULL) {
 206       free(attrib);
 207       free(tree);
 208       return NULL;
 209    }
 210
 211    xcb_window_t root = tree->root;
 212    xcb_visualid_t visual_id = attrib->visual;
 213    free(attrib);
 214    free(tree);
 215
 216    xcb_screen_t *screen = get_screen_for_root(conn, root);
 217    if (screen == NULL)
 218       return NULL;
 219
 220    return screen_get_visualtype(screen, visual_id, depth);
 221 }
 222
 223 static bool
 224 visual_has_alpha(xcb_visualtype_t *visual, unsigned depth)
 225 {
 226    uint32_t rgb_mask = visual->red_mask |
 227                        visual->green_mask |
 228                        visual->blue_mask;
 229
 230    uint32_t all_mask = 0xffffffff >> (32 - depth);
 231
 232    /* Do we have bits left over after RGB? */
 233    return (all_mask & ~rgb_mask) != 0;
 234 }
 235
 236 static VkBool32 anv_get_physical_device_xcb_presentation_support(
 237     struct anv_wsi_device *wsi_device,
 238     VkAllocationCallbacks *alloc,
 239     uint32_t                                    queueFamilyIndex,
 240     xcb_connection_t*                           connection,
 241     xcb_visualid_t                              visual_id)
 242 {
 243    struct wsi_x11_connection *wsi_conn =
 244       wsi_x11_get_connection(wsi_device, alloc, connection);
 245
 246    if (!wsi_conn->has_dri3) {
 247       fprintf(stderr, "vulkan: No DRI3 support\n");
 248       return false;
 249    }
 250
 251    unsigned visual_depth;
 252    if (!connection_get_visualtype(connection, visual_id, &visual_depth))
 253       return false;
 254
 255    if (visual_depth != 24 && visual_depth != 32)
 256       return false;
 257
 258    return true;
 259 }
 260
 261 VkBool32 anv_GetPhysicalDeviceXcbPresentationSupportKHR(
 262     VkPhysicalDevice                            physicalDevice,
 263     uint32_t                                    queueFamilyIndex,
 264     xcb_connection_t*                           connection,
 265     xcb_visualid_t                              visual_id)
 266 {
 267    ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
 268
 269    return anv_get_physical_device_xcb_presentation_support(
 270       &device->wsi_device,
 271       &device->instance->alloc,
 272       queueFamilyIndex, connection, visual_id);
 273 }
 274
 275 VkBool32 anv_GetPhysicalDeviceXlibPresentationSupportKHR(
 276     VkPhysicalDevice                            physicalDevice,
 277     uint32_t                                    queueFamilyIndex,
 278     Display*                                    dpy,
 279     VisualID                                    visualID)
 280 {
 281    ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
 282
 283    return anv_get_physical_device_xcb_presentation_support(
 284       &device->wsi_device,
 285       &device->instance->alloc,
 286       queueFamilyIndex, XGetXCBConnection(dpy), visualID);
 287 }
 288
 289 static xcb_connection_t*
 290 x11_surface_get_connection(VkIcdSurfaceBase *icd_surface)
 291 {
 292    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 293       return XGetXCBConnection(((VkIcdSurfaceXlib *)icd_surface)->dpy);
 294    else
 295       return ((VkIcdSurfaceXcb *)icd_surface)->connection;
 296 }
 297
 298 static xcb_window_t
 299 x11_surface_get_window(VkIcdSurfaceBase *icd_surface)
 300 {
 301    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 302       return ((VkIcdSurfaceXlib *)icd_surface)->window;
 303    else
 304       return ((VkIcdSurfaceXcb *)icd_surface)->window;
 305 }
 306
 307 static VkResult
 308 x11_surface_get_support(VkIcdSurfaceBase *icd_surface,
 309                         struct anv_wsi_device *wsi_device,
 310                         const VkAllocationCallbacks *alloc,
 311                         uint32_t queueFamilyIndex,
 312                         VkBool32* pSupported)
 313 {
 314    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 315    xcb_window_t window = x11_surface_get_window(icd_surface);
 316
 317    struct wsi_x11_connection *wsi_conn =
 318       wsi_x11_get_connection(wsi_device, alloc, conn);
 319    if (!wsi_conn)
 320       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 321
 322    if (!wsi_conn->has_dri3) {
 323       fprintf(stderr, "vulkan: No DRI3 support\n");
 324       *pSupported = false;
 325       return VK_SUCCESS;
 326    }
 327
 328    unsigned visual_depth;
 329    if (!get_visualtype_for_window(conn, window, &visual_depth)) {
 330       *pSupported = false;
 331       return VK_SUCCESS;
 332    }
 333
 334    if (visual_depth != 24 && visual_depth != 32) {
 335       *pSupported = false;
 336       return VK_SUCCESS;
 337    }
 338
 339    *pSupported = true;
 340    return VK_SUCCESS;
 341 }
 342
 343 static VkResult
 344 x11_surface_get_capabilities(VkIcdSurfaceBase *icd_surface,
 345                              VkSurfaceCapabilitiesKHR *caps)
 346 {
 347    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 348    xcb_window_t window = x11_surface_get_window(icd_surface);
 349    xcb_get_geometry_cookie_t geom_cookie;
 350    xcb_generic_error_t *err;
 351    xcb_get_geometry_reply_t *geom;
 352    unsigned visual_depth;
 353
 354    geom_cookie = xcb_get_geometry(conn, window);
 355
 356    /* This does a round-trip.  This is why we do get_geometry first and
 357     * wait to read the reply until after we have a visual.
 358     */
 359    xcb_visualtype_t *visual =
 360       get_visualtype_for_window(conn, window, &visual_depth);
 361
 362    geom = xcb_get_geometry_reply(conn, geom_cookie, &err);
 363    if (geom) {
 364       VkExtent2D extent = { geom->width, geom->height };
 365       caps->currentExtent = extent;
 366       caps->minImageExtent = extent;
 367       caps->maxImageExtent = extent;
 368    } else {
 369       /* This can happen if the client didn't wait for the configure event
 370        * to come back from the compositor.  In that case, we don't know the
 371        * size of the window so we just return valid "I don't know" stuff.
 372        */
 373       caps->currentExtent = (VkExtent2D) { -1, -1 };
 374       caps->minImageExtent = (VkExtent2D) { 1, 1 };
 375       caps->maxImageExtent = (VkExtent2D) { INT16_MAX, INT16_MAX };
 376    }
 377    free(err);
 378    free(geom);
 379
 380    if (visual_has_alpha(visual, visual_depth)) {
 381       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 382                                       VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR;
 383    } else {
 384       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 385                                       VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 386    }
 387
 388    caps->minImageCount = 2;
 389    caps->maxImageCount = 4;
 390    caps->supportedTransforms = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 391    caps->currentTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 392    caps->maxImageArrayLayers = 1;
 393    caps->supportedUsageFlags =
 394       VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
 395       VK_IMAGE_USAGE_SAMPLED_BIT |
 396       VK_IMAGE_USAGE_TRANSFER_DST_BIT |
 397       VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 398
 399    return VK_SUCCESS;
 400 }
 401
 402 static VkResult
 403 x11_surface_get_formats(VkIcdSurfaceBase *surface,
 404                         struct anv_wsi_device *wsi_device,
 405                         uint32_t *pSurfaceFormatCount,
 406                         VkSurfaceFormatKHR *pSurfaceFormats)
 407 {
 408    if (pSurfaceFormats == NULL) {
 409       *pSurfaceFormatCount = ARRAY_SIZE(formats);
 410       return VK_SUCCESS;
 411    }
 412
 413    assert(*pSurfaceFormatCount >= ARRAY_SIZE(formats));
 414    typed_memcpy(pSurfaceFormats, formats, *pSurfaceFormatCount);
 415    *pSurfaceFormatCount = ARRAY_SIZE(formats);
 416
 417    return VK_SUCCESS;
 418 }
 419
 420 static VkResult
 421 x11_surface_get_present_modes(VkIcdSurfaceBase *surface,
 422                               uint32_t *pPresentModeCount,
 423                               VkPresentModeKHR *pPresentModes)
 424 {
 425    if (pPresentModes == NULL) {
 426       *pPresentModeCount = ARRAY_SIZE(present_modes);
 427       return VK_SUCCESS;
 428    }
 429
 430    assert(*pPresentModeCount >= ARRAY_SIZE(present_modes));
 431    typed_memcpy(pPresentModes, present_modes, *pPresentModeCount);
 432    *pPresentModeCount = ARRAY_SIZE(present_modes);
 433
 434    return VK_SUCCESS;
 435 }
 436
 437 static VkResult anv_create_xcb_surface(const VkAllocationCallbacks *pAllocator,
 438                                        const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
 439                                        VkSurfaceKHR *pSurface)
 440 {
 441    VkIcdSurfaceXcb *surface;
 442
 443    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 444                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 445    if (surface == NULL)
 446       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 447
 448    surface->base.platform = VK_ICD_WSI_PLATFORM_XCB;
 449    surface->connection = pCreateInfo->connection;
 450    surface->window = pCreateInfo->window;
 451
 452    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 453    return VK_SUCCESS;
 454 }
 455
 456 VkResult anv_CreateXcbSurfaceKHR(
 457     VkInstance                                  _instance,
 458     const VkXcbSurfaceCreateInfoKHR*            pCreateInfo,
 459     const VkAllocationCallbacks*                pAllocator,
 460     VkSurfaceKHR*                               pSurface)
 461 {
 462    ANV_FROM_HANDLE(anv_instance, instance, _instance);
 463    const VkAllocationCallbacks *alloc;
 464    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR);
 465
 466    if (pAllocator)
 467      alloc = pAllocator;
 468    else
 469      alloc = &instance->alloc;
 470
 471    return anv_create_xcb_surface(alloc, pCreateInfo, pSurface);
 472 }
 473
 474 static VkResult anv_create_xlib_surface(const VkAllocationCallbacks *pAllocator,
 475                                         const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
 476                                         VkSurfaceKHR *pSurface)
 477 {
 478    VkIcdSurfaceXlib *surface;
 479
 480    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 481                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 482    if (surface == NULL)
 483       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 484
 485    surface->base.platform = VK_ICD_WSI_PLATFORM_XLIB;
 486    surface->dpy = pCreateInfo->dpy;
 487    surface->window = pCreateInfo->window;
 488
 489    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 490    return VK_SUCCESS;
 491 }
 492
 493 VkResult anv_CreateXlibSurfaceKHR(
 494     VkInstance                                  _instance,
 495     const VkXlibSurfaceCreateInfoKHR*           pCreateInfo,
 496     const VkAllocationCallbacks*                pAllocator,
 497     VkSurfaceKHR*                               pSurface)
 498 {
 499    ANV_FROM_HANDLE(anv_instance, instance, _instance);
 500    const VkAllocationCallbacks *alloc;
 501
 502    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR);
 503
 504    if (pAllocator)
 505      alloc = pAllocator;
 506    else
 507      alloc = &instance->alloc;
 508
 509    return anv_create_xlib_surface(alloc, pCreateInfo, pSurface);
 510 }
 511
 512 struct x11_image {
 513    VkImage image;
 514    VkDeviceMemory memory;
 515    xcb_pixmap_t                              pixmap;
 516    bool                                      busy;
 517    struct xshmfence *                        shm_fence;
 518    uint32_t                                  sync_fence;
 519 };
 520
 521 struct x11_swapchain {
 522    struct anv_swapchain                        base;
 523
 524    xcb_connection_t *                           conn;
 525    xcb_window_t                                 window;
 526    xcb_gc_t                                     gc;
 527    VkExtent2D                                   extent;
 528    uint32_t                                     image_count;
 529
 530    xcb_present_event_t                          event_id;
 531    xcb_special_event_t *                        special_event;
 532    uint64_t                                     send_sbc;
 533    uint32_t                                     stamp;
 534
 535    struct x11_image                             images[0];
 536 };
 537
 538 static VkResult
 539 x11_get_images(struct anv_swapchain *anv_chain,
 540                uint32_t* pCount, VkImage *pSwapchainImages)
 541 {
 542    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 543
 544    if (pSwapchainImages == NULL) {
 545       *pCount = chain->image_count;
 546       return VK_SUCCESS;
 547    }
 548
 549    assert(chain->image_count <= *pCount);
 550    for (uint32_t i = 0; i < chain->image_count; i++)
 551       pSwapchainImages[i] = chain->images[i].image;
 552
 553    *pCount = chain->image_count;
 554
 555    return VK_SUCCESS;
 556 }
 557
 558 static VkResult
 559 x11_handle_dri3_present_event(struct x11_swapchain *chain,
 560                               xcb_present_generic_event_t *event)
 561 {
 562    switch (event->evtype) {
 563    case XCB_PRESENT_CONFIGURE_NOTIFY: {
 564       xcb_present_configure_notify_event_t *config = (void *) event;
 565
 566       if (config->width != chain->extent.width ||
 567           config->height != chain->extent.height)
 568          return vk_error(VK_ERROR_OUT_OF_DATE_KHR);
 569
 570       break;
 571    }
 572
 573    case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
 574       xcb_present_idle_notify_event_t *idle = (void *) event;
 575
 576       for (unsigned i = 0; i < chain->image_count; i++) {
 577          if (chain->images[i].pixmap == idle->pixmap) {
 578             chain->images[i].busy = false;
 579             break;
 580          }
 581       }
 582
 583       break;
 584    }
 585
 586    case XCB_PRESENT_COMPLETE_NOTIFY:
 587    default:
 588       break;
 589    }
 590
 591    return VK_SUCCESS;
 592 }
 593
 594 static VkResult
 595 x11_acquire_next_image(struct anv_swapchain *anv_chain,
 596                        uint64_t timeout,
 597                        VkSemaphore semaphore,
 598                        uint32_t *image_index)
 599 {
 600    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 601
 602    while (1) {
 603       for (uint32_t i = 0; i < chain->image_count; i++) {
 604          if (!chain->images[i].busy) {
 605             /* We found a non-busy image */
 606             xshmfence_await(chain->images[i].shm_fence);
 607             *image_index = i;
 608             chain->images[i].busy = true;
 609             return VK_SUCCESS;
 610          }
 611       }
 612
 613       xcb_flush(chain->conn);
 614       xcb_generic_event_t *event =
 615          xcb_wait_for_special_event(chain->conn, chain->special_event);
 616       if (!event)
 617          return vk_error(VK_ERROR_OUT_OF_DATE_KHR);
 618
 619       VkResult result = x11_handle_dri3_present_event(chain, (void *)event);
 620       free(event);
 621       if (result != VK_SUCCESS)
 622          return result;
 623    }
 624 }
 625
 626 static VkResult
 627 x11_queue_present(struct anv_swapchain *anv_chain,
 628                   uint32_t image_index)
 629 {
 630    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 631    struct x11_image *image = &chain->images[image_index];
 632
 633    assert(image_index < chain->image_count);
 634
 635    uint32_t options = XCB_PRESENT_OPTION_NONE;
 636
 637    int64_t target_msc = 0;
 638    int64_t divisor = 0;
 639    int64_t remainder = 0;
 640
 641    options |= XCB_PRESENT_OPTION_ASYNC;
 642
 643    xshmfence_reset(image->shm_fence);
 644
 645    ++chain->send_sbc;
 646    xcb_void_cookie_t cookie =
 647       xcb_present_pixmap(chain->conn,
 648                          chain->window,
 649                          image->pixmap,
 650                          (uint32_t) chain->send_sbc,
 651                          0,                                    /* valid */
 652                          0,                                    /* update */
 653                          0,                                    /* x_off */
 654                          0,                                    /* y_off */
 655                          XCB_NONE,                             /* target_crtc */
 656                          XCB_NONE,
 657                          image->sync_fence,
 658                          options,
 659                          target_msc,
 660                          divisor,
 661                          remainder, 0, NULL);
 662    xcb_discard_reply(chain->conn, cookie.sequence);
 663    image->busy = true;
 664
 665    xcb_flush(chain->conn);
 666
 667    return VK_SUCCESS;
 668 }
 669
 670 static VkResult
 671 x11_image_init(VkDevice device_h, struct x11_swapchain *chain,
 672                const VkSwapchainCreateInfoKHR *pCreateInfo,
 673                const VkAllocationCallbacks* pAllocator,
 674                struct x11_image *image)
 675 {
 676    xcb_void_cookie_t cookie;
 677    VkResult result;
 678    uint32_t row_pitch;
 679    uint32_t offset;
 680    uint32_t bpp = 32;
 681    uint32_t depth = 24;
 682    int fd;
 683    uint32_t size;
 684
 685    result = chain->base.image_fns->create_wsi_image(device_h,
 686                                                     pCreateInfo,
 687                                                     pAllocator,
 688                                                     &image->image,
 689                                                     &image->memory,
 690                                                     &size,
 691                                                     &offset,
 692                                                     &row_pitch,
 693                                                     &fd);
 694    if (result != VK_SUCCESS)
 695       return result;
 696
 697    image->pixmap = xcb_generate_id(chain->conn);
 698
 699    cookie =
 700       xcb_dri3_pixmap_from_buffer_checked(chain->conn,
 701                                           image->pixmap,
 702                                           chain->window,
 703                                           size,
 704                                           pCreateInfo->imageExtent.width,
 705                                           pCreateInfo->imageExtent.height,
 706                                           row_pitch,
 707                                           depth, bpp, fd);
 708    xcb_discard_reply(chain->conn, cookie.sequence);
 709
 710    int fence_fd = xshmfence_alloc_shm();
 711    if (fence_fd < 0)
 712       goto fail_pixmap;
 713
 714    image->shm_fence = xshmfence_map_shm(fence_fd);
 715    if (image->shm_fence == NULL)
 716       goto fail_shmfence_alloc;
 717
 718    image->sync_fence = xcb_generate_id(chain->conn);
 719    xcb_dri3_fence_from_fd(chain->conn,
 720                           image->pixmap,
 721                           image->sync_fence,
 722                           false,
 723                           fence_fd);
 724
 725    image->busy = false;
 726    xshmfence_trigger(image->shm_fence);
 727
 728    return VK_SUCCESS;
 729
 730 fail_shmfence_alloc:
 731    close(fence_fd);
 732
 733 fail_pixmap:
 734    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 735    xcb_discard_reply(chain->conn, cookie.sequence);
 736
 737    chain->base.image_fns->free_wsi_image(device_h, pAllocator,
 738                                          image->image, image->memory);
 739    return result;
 740 }
 741
 742 static void
 743 x11_image_finish(struct x11_swapchain *chain,
 744                  const VkAllocationCallbacks* pAllocator,
 745                  struct x11_image *image)
 746 {
 747    xcb_void_cookie_t cookie;
 748
 749    cookie = xcb_sync_destroy_fence(chain->conn, image->sync_fence);
 750    xcb_discard_reply(chain->conn, cookie.sequence);
 751    xshmfence_unmap_shm(image->shm_fence);
 752
 753    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 754    xcb_discard_reply(chain->conn, cookie.sequence);
 755
 756    chain->base.image_fns->free_wsi_image(chain->base.device, pAllocator,
 757                                          image->image, image->memory);
 758 }
 759
 760 static VkResult
 761 x11_swapchain_destroy(struct anv_swapchain *anv_chain,
 762                       const VkAllocationCallbacks *pAllocator)
 763 {
 764    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 765    for (uint32_t i = 0; i < chain->image_count; i++)
 766       x11_image_finish(chain, pAllocator, &chain->images[i]);
 767
 768    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 769
 770    vk_free(pAllocator, chain);
 771
 772    return VK_SUCCESS;
 773 }
 774
 775 static VkResult
 776 x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
 777                              VkDevice device,
 778                              struct anv_wsi_device *wsi_device,
 779                              const VkSwapchainCreateInfoKHR *pCreateInfo,
 780                              const VkAllocationCallbacks* pAllocator,
 781                              const struct anv_wsi_image_fns *image_fns,
 782                              struct anv_swapchain **swapchain_out)
 783 {
 784    struct x11_swapchain *chain;
 785    xcb_void_cookie_t cookie;
 786    VkResult result;
 787
 788    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR);
 789
 790    int num_images = pCreateInfo->minImageCount;
 791
 792    /* For true mailbox mode, we need at least 4 images:
 793     *  1) One to scan out from
 794     *  2) One to have queued for scan-out
 795     *  3) One to be currently held by the Wayland compositor
 796     *  4) One to render to
 797     */
 798    if (pCreateInfo->presentMode == VK_PRESENT_MODE_MAILBOX_KHR)
 799       num_images = MAX2(num_images, 4);
 800
 801    size_t size = sizeof(*chain) + num_images * sizeof(chain->images[0]);
 802    chain = vk_alloc(pAllocator, size, 8,
 803                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 804    if (chain == NULL)
 805       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 806
 807    chain->base.device = device;
 808    chain->base.destroy = x11_swapchain_destroy;
 809    chain->base.get_images = x11_get_images;
 810    chain->base.acquire_next_image = x11_acquire_next_image;
 811    chain->base.queue_present = x11_queue_present;
 812    chain->base.image_fns = image_fns;
 813    chain->conn = x11_surface_get_connection(icd_surface);
 814    chain->window = x11_surface_get_window(icd_surface);
 815    chain->extent = pCreateInfo->imageExtent;
 816    chain->image_count = num_images;
 817    chain->send_sbc = 0;
 818
 819    chain->event_id = xcb_generate_id(chain->conn);
 820    xcb_present_select_input(chain->conn, chain->event_id, chain->window,
 821                             XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
 822                             XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
 823                             XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
 824
 825    /* Create an XCB event queue to hold present events outside of the usual
 826     * application event queue
 827     */
 828    chain->special_event =
 829       xcb_register_for_special_xge(chain->conn, &xcb_present_id,
 830                                    chain->event_id, NULL);
 831
 832    chain->gc = xcb_generate_id(chain->conn);
 833    if (!chain->gc) {
 834       /* FINISHME: Choose a better error. */
 835       result = vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 836       goto fail_register;
 837    }
 838
 839    cookie = xcb_create_gc(chain->conn,
 840                           chain->gc,
 841                           chain->window,
 842                           XCB_GC_GRAPHICS_EXPOSURES,
 843                           (uint32_t []) { 0 });
 844    xcb_discard_reply(chain->conn, cookie.sequence);
 845
 846    uint32_t image = 0;
 847    for (; image < chain->image_count; image++) {
 848       result = x11_image_init(device, chain, pCreateInfo, pAllocator,
 849                               &chain->images[image]);
 850       if (result != VK_SUCCESS)
 851          goto fail_init_images;
 852    }
 853
 854    *swapchain_out = &chain->base;
 855
 856    return VK_SUCCESS;
 857
 858 fail_init_images:
 859    for (uint32_t j = 0; j < image; j++)
 860       x11_image_finish(chain, pAllocator, &chain->images[j]);
 861
 862 fail_register:
 863    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 864
 865    vk_free(pAllocator, chain);
 866
 867    return result;
 868 }
 869
 870 VkResult
 871 anv_x11_init_wsi(struct anv_wsi_device *wsi_device,
 872                  const VkAllocationCallbacks *alloc)
 873 {
 874    struct wsi_x11 *wsi;
 875    VkResult result;
 876
 877    wsi = vk_alloc(alloc, sizeof(*wsi), 8,
 878                    VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
 879    if (!wsi) {
 880       result = vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 881       goto fail;
 882    }
 883
 884    int ret = pthread_mutex_init(&wsi->mutex, NULL);
 885    if (ret != 0) {
 886       if (ret == ENOMEM) {
 887          result = vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 888       } else {
 889          /* FINISHME: Choose a better error. */
 890          result = vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 891       }
 892
 893       goto fail_alloc;
 894    }
 895
 896    wsi->connections = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
 897                                               _mesa_key_pointer_equal);
 898    if (!wsi->connections) {
 899       result = vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 900       goto fail_mutex;
 901    }
 902
 903    wsi->base.get_support = x11_surface_get_support;
 904    wsi->base.get_capabilities = x11_surface_get_capabilities;
 905    wsi->base.get_formats = x11_surface_get_formats;
 906    wsi->base.get_present_modes = x11_surface_get_present_modes;
 907    wsi->base.create_swapchain = x11_surface_create_swapchain;
 908
 909    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = &wsi->base;
 910    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = &wsi->base;
 911
 912    return VK_SUCCESS;
 913
 914 fail_mutex:
 915    pthread_mutex_destroy(&wsi->mutex);
 916 fail_alloc:
 917    vk_free(alloc, wsi);
 918 fail:
 919    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = NULL;
 920    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = NULL;
 921
 922    return result;
 923 }
 924
 925 void
 926 anv_x11_finish_wsi(struct anv_wsi_device *wsi_device,
 927                    const VkAllocationCallbacks *alloc)
 928 {
 929    struct wsi_x11 *wsi =
 930       (struct wsi_x11 *)wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB];
 931
 932    if (wsi) {
 933       _mesa_hash_table_destroy(wsi->connections, NULL);
 934
 935       pthread_mutex_destroy(&wsi->mutex);
 936
 937       vk_free(alloc, wsi);
 938    }
 939 }