+/* Special case to drop or hand off packets for sync/async modes.
+ *
+ * Different than sync mode, async mode only enqueue drop or hand-off packets
+ * to next nodes.
+ */
+always_inline void
+esp_set_next_index (int is_async, u32 * from, u16 * nexts, u32 bi,
+ u16 * drop_index, u16 drop_next, u16 * next)
+{
+ if (is_async)
+ {
+ from[*drop_index] = bi;
+ nexts[*drop_index] = drop_next;
+ *drop_index += 1;
+ }
+ else
+ next[0] = drop_next;
+}
+
+/* when submitting a frame is failed, drop all buffers in the frame */
+always_inline void
+esp_async_recycle_failed_submit (vnet_crypto_async_frame_t * f,
+ vlib_buffer_t ** b, u32 * from, u16 * nexts,
+ u16 * n_dropped, u16 drop_next_index,
+ vlib_error_t err)
+{
+ u32 n_drop = f->n_elts;
+ u32 *bi = f->buffer_indices;
+ b -= n_drop;
+ while (n_drop--)
+ {
+ b[0]->error = err;
+ esp_set_next_index (1, from, nexts, bi[0], n_dropped, drop_next_index,
+ NULL);
+ bi++;
+ b++;
+ }
+ vnet_crypto_async_reset_frame (f);
+}
+