From 75f833ca829f4afda54bfb1e17ebc1915af2e28e Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olvaffe@gmail.com>
Date: Mon, 14 Oct 2024 14:23:06 -0700
Subject: [PATCH] panvk: fill in VkExternalBufferProperties

Opaque fds are internally dma-bufs.  We also support both export and
import.

Fixes: 17b81d1fdcc ("panvk: expose KHR_external_memory and KHR_external_memory_capabilities")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31649>
---
 src/panfrost/vulkan/panvk_physical_device.c | 24 ++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/panfrost/vulkan/panvk_physical_device.c b/src/panfrost/vulkan/panvk_physical_device.c
index d9c964b4878..9451f8ee85d 100644
--- a/src/panfrost/vulkan/panvk_physical_device.c
+++ b/src/panfrost/vulkan/panvk_physical_device.c
@@ -1477,5 +1477,27 @@ panvk_GetPhysicalDeviceExternalBufferProperties(
    const VkPhysicalDeviceExternalBufferInfo *pExternalBufferInfo,
    VkExternalBufferProperties *pExternalBufferProperties)
 {
-   panvk_stub();
+   const VkExternalMemoryHandleTypeFlags supported_handle_types =
+      VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT |
+      VK_EXTERNAL_MEMORY_HANDLE_TYPE_DMA_BUF_BIT_EXT;
+
+   /* From the Vulkan 1.3.298 spec:
+    *
+    *    compatibleHandleTypes must include at least handleType.
+    */
+   VkExternalMemoryHandleTypeFlags handle_types =
+      pExternalBufferInfo->handleType;
+   VkExternalMemoryFeatureFlags features = 0;
+   if (pExternalBufferInfo->handleType & supported_handle_types) {
+      handle_types |= supported_handle_types;
+      features |= VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT |
+                  VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT;
+   }
+
+   pExternalBufferProperties->externalMemoryProperties =
+      (VkExternalMemoryProperties){
+         .externalMemoryFeatures = features,
+         .exportFromImportedHandleTypes = handle_types,
+         .compatibleHandleTypes = handle_types,
+      };
 }