v3dv/device: Support loader interface version 3.
Port of 1e41d7f7b0855934744fe578ba4eae9209ee69f7:
"anv: Support loader interface version 3 (patch v2)"
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
diff --git a/src/broadcom/vulkan/v3dv_device.c b/src/broadcom/vulkan/v3dv_device.c
index a6751fc..36d74b8 100644
--- a/src/broadcom/vulkan/v3dv_device.c
+++ b/src/broadcom/vulkan/v3dv_device.c
@@ -2264,3 +2264,50 @@
{
*pSparseMemoryRequirementCount = 0;
}
+
+/* vk_icd.h does not declare this function, so we declare it here to
+ * suppress Wmissing-prototypes.
+ */
+PUBLIC VKAPI_ATTR VkResult VKAPI_CALL
+vk_icdNegotiateLoaderICDInterfaceVersion(uint32_t* pSupportedVersion);
+
+PUBLIC VKAPI_ATTR VkResult VKAPI_CALL
+vk_icdNegotiateLoaderICDInterfaceVersion(uint32_t* pSupportedVersion)
+{
+ /* For the full details on loader interface versioning, see
+ * <https://github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers/blob/master/loader/LoaderAndLayerInterface.md>.
+ * What follows is a condensed summary, to help you navigate the large and
+ * confusing official doc.
+ *
+ * - Loader interface v0 is incompatible with later versions. We don't
+ * support it.
+ *
+ * - In loader interface v1:
+ * - The first ICD entrypoint called by the loader is
+ * vk_icdGetInstanceProcAddr(). The ICD must statically expose this
+ * entrypoint.
+ * - The ICD must statically expose no other Vulkan symbol unless it is
+ * linked with -Bsymbolic.
+ * - Each dispatchable Vulkan handle created by the ICD must be
+ * a pointer to a struct whose first member is VK_LOADER_DATA. The
+ * ICD must initialize VK_LOADER_DATA.loadMagic to ICD_LOADER_MAGIC.
+ * - The loader implements vkCreate{PLATFORM}SurfaceKHR() and
+ * vkDestroySurfaceKHR(). The ICD must be capable of working with
+ * such loader-managed surfaces.
+ *
+ * - Loader interface v2 differs from v1 in:
+ * - The first ICD entrypoint called by the loader is
+ * vk_icdNegotiateLoaderICDInterfaceVersion(). The ICD must
+ * statically expose this entrypoint.
+ *
+ * - Loader interface v3 differs from v2 in:
+ * - The ICD must implement vkCreate{PLATFORM}SurfaceKHR(),
+ * vkDestroySurfaceKHR(), and other API which uses VKSurfaceKHR,
+ * because the loader no longer does so.
+ *
+ * - Loader interface v4 differs from v3 in:
+ * - The ICD must implement vk_icdGetPhysicalDeviceProcAddr().
+ */
+ *pSupportedVersion = MIN2(*pSupportedVersion, 3u);
+ return VK_SUCCESS;
+}
