mg2d: add a function for getting maximum supported fd_stencil

This is needed for the caller to know the number of boundary zones that
can be filled.

API bump.

1 files changed, 5 insertions, 0 deletions

diff --git a/mg2d.c b/mg2d.c
index 55b8ed9..6b94def 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -714,3 +714,8 @@ void mg2d_print_stats(MG2DContext *ctx, const char *prefix)
               other / 1e6, other / 1e3 / priv->count_solve);
 
 }
+
+unsigned int mg2d_max_fd_stencil(void)
+{
+    return FD_STENCIL_MAX;
+}