anv: Implement VK_KHX_external_semaphore

Reviewed-by: Chad Versace <chadversary@chromium.org>

src/intel/vulkan/anv_device.c

@@ -374,6 +374,10 @@ static const VkExtensionProperties device_extensions[] = {
       .extensionName = VK_KHX_EXTERNAL_MEMORY_FD_EXTENSION_NAME,
       .specVersion = 1,
    },
+   {
+      .extensionName = VK_KHX_EXTERNAL_SEMAPHORE_EXTENSION_NAME,
+      .specVersion = 1,
+   },
    {
       .extensionName = VK_KHX_MULTIVIEW_EXTENSION_NAME,
       .specVersion = 1,

src/intel/vulkan/anv_entrypoints_gen.py

@@ -48,6 +48,7 @@ SUPPORTED_EXTENSIONS = [
     'VK_KHX_external_memory',
     'VK_KHX_external_memory_capabilities',
     'VK_KHX_external_memory_fd',
+    'VK_KHX_external_semaphore',
     'VK_KHX_external_semaphore_capabilities',
     'VK_KHX_multiview',
 ]

src/intel/vulkan/anv_queue.c

@@ -508,6 +508,14 @@ VkResult anv_CreateSemaphore(
    if (semaphore == NULL)
       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 
+   const VkExportSemaphoreCreateInfoKHX *export =
+      vk_find_struct_const(pCreateInfo->pNext, EXPORT_SEMAPHORE_CREATE_INFO_KHX);
+    VkExternalSemaphoreHandleTypeFlagsKHX handleTypes =
+      export ? export->handleTypes : 0;
+
+   /* External semaphores are not yet supported */
+   assert(handleTypes == 0);
+
    /* The DRM execbuffer ioctl always execute in-oder, even between
     * different rings. As such, a dummy no-op semaphore is a perfectly
     * valid implementation.