st/va: add support to export a surface as dmabuf

I.e. implements:
VaAcquireBufferHandle
VaReleaseBufferHandle
for memory of type VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME

And apply relatives change to:
vlVaMapBuffer
vlVaUnMapBuffer
vlVaDestroyBuffer

Implementation inspired from cgit.freedesktop.org/vaapi/intel-driver

Tested with gstreamer-vaapi with nouveau driver.

Signed-off-by: Julien Isorce <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Christian König <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/va/va_private.h b/src/gallium/state_trackers/va/va_private.h
index 3ae51a766a0..2b645d08a03 100644
--- a/src/gallium/state_trackers/va/va_private.h
+++ b/src/gallium/state_trackers/va/va_private.h
@@ -34,6 +34,7 @@
 #include <va/va.h>
 #include <va/va_backend.h>
 #include <va/va_backend_vpp.h>
+#include <va/va_drmcommon.h>
 
 #include "pipe/p_video_enums.h"
 #include "pipe/p_video_codec.h"
@@ -238,6 +239,8 @@ typedef struct {
       struct pipe_transfer *transfer;
       struct pipe_fence_handle *fence;
    } derived_surface;
+   unsigned int export_refcount;
+   VABufferInfo export_state;
 } vlVaBuffer;
 
 typedef struct {
@@ -328,6 +331,9 @@ VAStatus vlVaCreateSurfaces2(VADriverContextP ctx, unsigned int format, unsigned
 VAStatus vlVaQuerySurfaceAttributes(VADriverContextP ctx, VAConfigID config, VASurfaceAttrib *attrib_list,
                                     unsigned int *num_attribs);
 
+VAStatus vlVaAcquireBufferHandle(VADriverContextP ctx, VABufferID buf_id, VABufferInfo *out_buf_info);
+VAStatus vlVaReleaseBufferHandle(VADriverContextP ctx, VABufferID buf_id);
+
 VAStatus vlVaQueryVideoProcFilters(VADriverContextP ctx, VAContextID context, VAProcFilterType *filters,
                                    unsigned int *num_filters);
 VAStatus vlVaQueryVideoProcFilterCaps(VADriverContextP ctx, VAContextID context, VAProcFilterType type,