svga/winsys: Implement surface sharing using prime fd handles

This needs a prime-aware vmwgfx kernel module to work properly.

(With additions by Christopher James Halse Rogers <[email protected]>)

Signed-off-by: Christopher James Halse Rogers <[email protected]>
Signed-off-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Maarten Lankhorst <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/gallium/targets/dri-vmwgfx/target.c b/src/gallium/targets/dri-vmwgfx/target.c
index e01e4652ada..aaf37b0c4fc 100644
--- a/src/gallium/targets/dri-vmwgfx/target.c
+++ b/src/gallium/targets/dri-vmwgfx/target.c
@@ -31,11 +31,24 @@ static const struct drm_conf_ret throttle_ret = {
    .val.val_int = 2,
 };
 
+/* Technically this requires kernel support that is not yet
+ * widespread.
+ *
+ * We could check for support in create_screen and return the correct
+ * value, but for now just return true in all cases.
+ */
+static const struct drm_conf_ret share_fd_ret = {
+   .type = DRM_CONF_BOOL,
+   .val.val_int = true,
+};
+
 static const struct drm_conf_ret *drm_configuration(enum drm_conf conf)
 {
    switch (conf) {
    case DRM_CONF_THROTTLE:
       return &throttle_ret;
+   case DRM_CONF_SHARE_FD:
+      return &share_fd_ret;
    default:
       break;
    }