[Mesa-dev] [PATCH 16/21] vulkan: Define new VK_MESA_query_timestamp extension

[Keith Packard]

This extension adds a single function to query the current GPU
timestamp, just like glGetInteger64v(GL_TIMESTAMP, &timestamp). This
function is needed to complete the implementation of
GOOGLE_display_timing, which needs to be able to coorelate GPU and CPU
timestamps.

Signed-off-by: Keith Packard <keithp at keithp.com>
---
 include/vulkan/vulkan.h                         |  6 ++++++
 src/Makefile.am                                 |  1 +
 src/vulkan/meson.build                          |  1 +
 src/vulkan/registry/vk_mesa_query_timestamp.xml | 22 ++++++++++++++++++++++
 4 files changed, 30 insertions(+)
 create mode 100644 src/vulkan/registry/vk_mesa_query_timestamp.xml

diff --git a/include/vulkan/vulkan.h b/include/vulkan/vulkan.h
index d3e2e246cf3..5523eb7586f 100644
--- a/include/vulkan/vulkan.h
+++ b/include/vulkan/vulkan.h
@@ -7025,6 +7025,12 @@ VKAPI_ATTR VkResult VKAPI_CALL vkGetMemoryHostPointerPropertiesEXT(
     VkMemoryHostPointerPropertiesEXT*           pMemoryHostPointerProperties);
 #endif
 
+typedef VkResult (VKAPI_PTR *PFN_vkQueryCurrentTimestampMESA)(VkDevice device, uint64_t *timestamp);
+
+VKAPI_ATTR VkResult VKAPI_CALL vkQueryCurrentTimestampMESA(
+    VkDevice                                    _device,
+    uint64_t                                    *timestamp);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/Makefile.am b/src/Makefile.am
index 014ffaf3e29..74ff305d7c6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -68,6 +68,7 @@ endif
 
 EXTRA_DIST += vulkan/registry/vk.xml
 EXTRA_DIST += vulkan/registry/vk_android_native_buffer.xml
+EXTRA_DIST += vulkan/registry/vk_mesa_query_timestamp.xml
 
 if HAVE_AMD_DRIVERS
 SUBDIRS += amd
diff --git a/src/vulkan/meson.build b/src/vulkan/meson.build
index 3908005b8a0..6ab0966b7c5 100644
--- a/src/vulkan/meson.build
+++ b/src/vulkan/meson.build
@@ -20,6 +20,7 @@
 
 vk_api_xml = files('registry/vk.xml')
 vk_android_native_buffer_xml = files('registry/vk_android_native_buffer.xml')
+vk_mesa_query_timestamp_xml = files('registry/vk_mesa_query_timestamp.xml')
 
 inc_vulkan_util = include_directories('util')
 inc_vulkan_wsi = include_directories('wsi')
diff --git a/src/vulkan/registry/vk_mesa_query_timestamp.xml b/src/vulkan/registry/vk_mesa_query_timestamp.xml
new file mode 100644
index 00000000000..7fd4d974872
--- /dev/null
+++ b/src/vulkan/registry/vk_mesa_query_timestamp.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<registry>
+    <commands>
+        <command>
+            <proto><type>VkResult</type> <name>vkQueryCurrentTimestampMESA</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint64_t</type>* <name>pTimestamp</name></param>
+        </command>
+    </commands>
+    <extensions>
+        <extension name="VK_MESA_query_timestamp" number="200"
+		   type="device" author="MESA"
+		   contact="Keith Packard @keithp"
+		   supported="vulkan">
+            <require>
+                <enum value="1"                                         name="VK_MESA_QUERY_TIMESTAMP_SPEC_VERSION"/>
+                <enum value=""VK_MESA_query_timestamp""       name="VK_MESA_QUERY_TIMESTAMP_NAME"/>
+                <command name="vkQueryCurrentTimestampMESA"/>
+            </require>
+        </extension>
+    </extensions>
+</registry>
-- 
2.15.1