+#ifndef _IQ_RING_
+#define _IQ_RING_
+
+#include <stdint.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_malloc.h>
+#include <rte_eventdev.h>
+
+#define IQ_RING_NAMESIZE 12
+#define QID_IQ_DEPTH 512
+#define QID_IQ_MASK (uint16_t)(QID_IQ_DEPTH - 1)
+
+struct iq_ring {
+	char name[IQ_RING_NAMESIZE] __rte_cache_aligned;
+	uint16_t write_idx;
+	uint16_t read_idx;
+
+	struct rte_event ring[QID_IQ_DEPTH];
+};
+
+#ifndef force_inline
+#define force_inline inline __attribute__((always_inline))
+#endif
+
+static inline struct iq_ring *
+iq_ring_create(const char *name, unsigned int socket_id)
+{
+	struct iq_ring *retval;
+
+	retval = rte_malloc_socket(NULL, sizeof(*retval), 0, socket_id);
+	if (retval == NULL)
+		goto end;
+
+	snprintf(retval->name, sizeof(retval->name), "%s", name);
+	retval->write_idx = retval->read_idx = 0;
+end:
+	return retval;
+}
+
+static inline void
+iq_ring_destroy(struct iq_ring *r)
+{
+	rte_free(r);
+}
+
+static force_inline uint16_t
+iq_ring_count(const struct iq_ring *r)
+{
+	return r->write_idx - r->read_idx;
+}
+
+static force_inline uint16_t
+iq_ring_free_count(const struct iq_ring *r)
+{
+	return QID_IQ_MASK - iq_ring_count(r);
+}
+
+static force_inline uint16_t
+iq_ring_enqueue_burst(struct iq_ring *r, struct rte_event *qes, uint16_t nb_qes)
+{
+	const uint16_t read = r->read_idx;
+	uint16_t write = r->write_idx;
+	const uint16_t space = read + QID_IQ_MASK - write;
+	uint16_t i;
+
+	if (space < nb_qes)
+		nb_qes = space;
+
+	for (i = 0; i < nb_qes; i++, write++)
+		r->ring[write & QID_IQ_MASK] = qes[i];
+
+	r->write_idx = write;
+
+	return nb_qes;
+}
+

diff --git a/drivers/event/sw/sw_evdev.h b/drivers/event/sw/sw_evdev.h
index 65f00e4..aaa8056 100644
--- a/drivers/event/sw/sw_evdev.h
+++ b/drivers/event/sw/sw_evdev.h

@@ -49,6 +49,78 @@
 #define SW_INFLIGHT_EVENTS_TOTAL 4096
 /* allow for lots of over-provisioning */
 #define MAX_SW_PROD_Q_DEPTH 4096
+#define SW_FRAGMENTS_MAX 16
+
+/* have a new scheduling type for 1:1 queue to port links */
+#define RTE_SCHED_TYPE_DIRECT (RTE_SCHED_TYPE_PARALLEL + 1)