Mesa (master): virgl: honor winsys supplied metadata

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Module: Mesa
Branch: master
Commit: a1a567211828731f263c977865b51832f90f15ea
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a1a567211828731f263c977865b51832f90f15ea

Author: Gurchetan Singh <gurchetansingh at chromium.org>
Date:   Wed Sep 25 10:44:44 2019 -0700

virgl: honor winsys supplied metadata

To truly to do this correctly, we'll have to fix the discrepancy between
drm_virtgpu_3d_transfer_to_host and virtio_gpu_transfer_host_3d. However,
this is a good starting point.

Since virtio-gpu only supports self-import and export, this should be fine.
Let's only do WINSYS_HANDLE_TYPE_FD for this currently.

Reviewed by: Robert Tarasov <tutankhamen at chromium.org>

---

 src/gallium/winsys/virgl/drm/virgl_drm_winsys.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
index 01e1f51d757..0fe61bbe465 100644
--- a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
+++ b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
@@ -313,10 +313,15 @@ virgl_drm_winsys_resource_create_handle(struct virgl_winsys *qws,
    struct virgl_hw_res *res = NULL;
    uint32_t handle = whandle->handle;
 
-   if (whandle->offset != 0) {
+   if (whandle->offset != 0 && whandle->type == WINSYS_HANDLE_TYPE_SHARED) {
       _debug_printf("attempt to import unsupported winsys offset %u\n",
                     whandle->offset);
       return NULL;
+   } else if (whandle->type == WINSYS_HANDLE_TYPE_FD) {
+      *plane = whandle->plane;
+      *stride = whandle->stride;
+      *plane_offset = whandle->offset;
+      *modifier = whandle->modifier;
    }
 
    mtx_lock(&qdws->bo_handles_mutex);