vkr: move memory fd export into vkr_device_memory

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>

src/venus/vkr_context.c

@@ -273,6 +273,7 @@ vkr_context_get_blob_locked(struct virgl_context *base,
    struct vkr_context *ctx = (struct vkr_context *)base;
    struct vkr_device_memory *mem;
    enum virgl_resource_fd_type fd_type = VIRGL_RESOURCE_FD_INVALID;
+   int fd = -1;
 
    mem = vkr_context_get_object(ctx, blob_id);
    if (!mem || mem->base.type != VK_OBJECT_TYPE_DEVICE_MEMORY)
@@ -308,9 +309,10 @@ vkr_context_get_blob_locked(struct virgl_context *base,
          fd_type = VIRGL_RESOURCE_FD_OPAQUE;
    }
 
-   int fd = -1;
    if (fd_type != VIRGL_RESOURCE_FD_INVALID) {
       VkExternalMemoryHandleTypeFlagBits handle_type;
+      int ret;
+
       switch (fd_type) {
       case VIRGL_RESOURCE_FD_DMABUF:
          handle_type = VK_EXTERNAL_MEMORY_HANDLE_TYPE_DMA_BUF_BIT_EXT;
@@ -322,16 +324,9 @@ vkr_context_get_blob_locked(struct virgl_context *base,
          return -EINVAL;
       }
 
-      VkResult result =
-         mem->device->get_memory_fd(mem->device->base.handle.device,
-                                    &(VkMemoryGetFdInfoKHR){
-                                       .sType = VK_STRUCTURE_TYPE_MEMORY_GET_FD_INFO_KHR,
-                                       .memory = mem->base.handle.device_memory,
-                                       .handleType = handle_type,
-                                    },
-                                    &fd);
-      if (result != VK_SUCCESS)
-         return -EINVAL;
+      ret = vkr_device_memory_export_fd(mem, handle_type, &fd);
+      if (ret)
+         return ret;
    }
 
    blob->type = fd_type;

src/venus/vkr_device_memory.c

@@ -249,3 +249,26 @@ vkr_device_memory_release(struct vkr_device_memory *mem)
 {
    list_del(&mem->exported_head);
 }
+
+int
+vkr_device_memory_export_fd(struct vkr_device_memory *mem,
+                            VkExternalMemoryHandleTypeFlagBits handle_type,
+                            int *out_fd)
+{
+   VkDevice dev_handle = mem->device->base.handle.device;
+   VkDeviceMemory mem_handle = mem->base.handle.device_memory;
+   const VkMemoryGetFdInfoKHR fd_info = {
+      .sType = VK_STRUCTURE_TYPE_MEMORY_GET_FD_INFO_KHR,
+      .memory = mem_handle,
+      .handleType = handle_type,
+   };
+   VkResult result;
+   int fd = -1;
+
+   result = mem->device->get_memory_fd(dev_handle, &fd_info, &fd);
+   if (result != VK_SUCCESS)
+      return result == VK_ERROR_TOO_MANY_OBJECTS ? -EMFILE : -ENOMEM;
+
+   *out_fd = fd;
+   return 0;
+}

src/venus/vkr_device_memory.h

@@ -27,4 +27,9 @@ vkr_context_init_device_memory_dispatch(struct vkr_context *ctx);
 void
 vkr_device_memory_release(struct vkr_device_memory *mem);
 
+int
+vkr_device_memory_export_fd(struct vkr_device_memory *mem,
+                            VkExternalMemoryHandleTypeFlagBits handle_type,
+                            int *out_fd);
+
 #endif /* VKR_DEVICE_MEMORY_H */