kk: add mtl_device_get_gpu_timestamp bridge

Reviewed-by: Aitor Camacho <aitor@lunarg.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38965>

src/kosmickrisp/bridge/mtl_device.h

@@ -29,6 +29,9 @@ uint32_t mtl_device_get_peer_index(mtl_device *dev);
 uint64_t mtl_device_get_registry_id(mtl_device *dev);
 struct mtl_size mtl_device_max_threads_per_threadgroup(mtl_device *dev);
 
+/* Timestamp query */
+uint64_t mtl_device_get_gpu_timestamp(mtl_device *dev);
+
 /* Resource queries */
 void mtl_heap_buffer_size_and_align_with_length(mtl_device *device,
                                                 uint64_t *size_B,
@@ -37,4 +40,4 @@ void
 mtl_heap_texture_size_and_align_with_descriptor(mtl_device *device,
                                                 struct kk_image_layout *layout);
 
-#endif /* MTL_DEVICE_H */
+#endif /* MTL_DEVICE_H */

src/kosmickrisp/bridge/mtl_device.m

@@ -129,6 +129,20 @@ mtl_device_max_threads_per_threadgroup(mtl_device *dev)
    }
 }
 
+/* Timestamp query */
+uint64_t
+mtl_device_get_gpu_timestamp(mtl_device *dev)
+{
+   @autoreleasepool {
+      id<MTLDevice> device = (id<MTLDevice>)dev;
+      MTLTimestamp cpu_ts, gpu_ts;
+
+      [device sampleTimestamps:&cpu_ts gpuTimestamp:&gpu_ts];
+
+      return (uint64_t)gpu_ts;
+   }
+}
+
 /* Resource queries */
 /* TODO_KOSMICKRISP Return a struct */
 void

src/kosmickrisp/bridge/stubs/mtl_device.c

@@ -59,6 +59,13 @@ mtl_device_max_threads_per_threadgroup(mtl_device *dev)
    return (struct mtl_size){};
 }
 
+/* Timestamp query */
+uint64_t
+mtl_device_get_gpu_timestamp(mtl_device *dev)
+{
+   return 0u;
+}
+
 /* Resource queries */
 void
 mtl_heap_buffer_size_and_align_with_length(mtl_device *device, uint64_t *size_B,