From fd55eea2ba7da057bd444cb8b7402fae85b1f247 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Mon, 8 Feb 2021 10:58:39 +1000
Subject: [PATCH] lavapipe: add calibrated timestamp support

This is a bit of a lie, but it's enough to get zink support
for timer queries to work.

Acked-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8909>
---
 src/gallium/frontends/lavapipe/lvp_device.c   | 39 +++++++++++++++++++
 .../frontends/lavapipe/lvp_extensions.py      |  2 +-
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/gallium/frontends/lavapipe/lvp_device.c b/src/gallium/frontends/lavapipe/lvp_device.c
index 1839bcc6448..af130be3c69 100644
--- a/src/gallium/frontends/lavapipe/lvp_device.c
+++ b/src/gallium/frontends/lavapipe/lvp_device.c
@@ -1698,3 +1698,42 @@ VKAPI_ATTR void VKAPI_CALL lvp_GetPhysicalDeviceExternalSemaphoreProperties(
    pExternalSemaphoreProperties->compatibleHandleTypes = 0;
    pExternalSemaphoreProperties->externalSemaphoreFeatures = 0;
 }
+
+static const VkTimeDomainEXT lvp_time_domains[] = {
+        VK_TIME_DOMAIN_DEVICE_EXT,
+        VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT,
+};
+
+VKAPI_ATTR VkResult VKAPI_CALL lvp_GetPhysicalDeviceCalibrateableTimeDomainsEXT(
+   VkPhysicalDevice physicalDevice,
+   uint32_t *pTimeDomainCount,
+   VkTimeDomainEXT *pTimeDomains)
+{
+   int d;
+   VK_OUTARRAY_MAKE_TYPED(VkTimeDomainEXT, out, pTimeDomains,
+                          pTimeDomainCount);
+
+   for (d = 0; d < ARRAY_SIZE(lvp_time_domains); d++) {
+      vk_outarray_append_typed(VkTimeDomainEXT, &out, i) {
+         *i = lvp_time_domains[d];
+      }
+    }
+
+    return vk_outarray_status(&out);
+}
+
+VKAPI_ATTR VkResult VKAPI_CALL lvp_GetCalibratedTimestampsEXT(
+   VkDevice device,
+   uint32_t timestampCount,
+   const VkCalibratedTimestampInfoEXT *pTimestampInfos,
+   uint64_t *pTimestamps,
+   uint64_t *pMaxDeviation)
+{
+   *pMaxDeviation = 1;
+
+   uint64_t now = os_time_get_nano();
+   for (unsigned i = 0; i < timestampCount; i++) {
+      pTimestamps[i] = now;
+   }
+   return VK_SUCCESS;
+}
diff --git a/src/gallium/frontends/lavapipe/lvp_extensions.py b/src/gallium/frontends/lavapipe/lvp_extensions.py
index b20e9ba2cd6..54b38cf8df9 100644
--- a/src/gallium/frontends/lavapipe/lvp_extensions.py
+++ b/src/gallium/frontends/lavapipe/lvp_extensions.py
@@ -107,7 +107,7 @@ EXTENSIONS = [
     Extension('VK_KHR_xlib_surface',                      6, 'VK_USE_PLATFORM_XLIB_KHR'),
     Extension('VK_EXT_acquire_xlib_display',              1, 'VK_USE_PLATFORM_XLIB_XRANDR_EXT'),
     Extension('VK_EXT_buffer_device_address',             1, False),
-    Extension('VK_EXT_calibrated_timestamps',             1, False),
+    Extension('VK_EXT_calibrated_timestamps',             1, True),
     Extension('VK_EXT_conditional_rendering',             1, True),
     Extension('VK_EXT_conservative_rasterization',        1, False),
     Extension('VK_EXT_debug_report',                      9, True),