vpp/dpdk/dpdk-2.2.0_patches/0026-enic-Optimization-of-Tx-path-to-reduce-Host-CPU-over.patch

From ca6bbb723880e91d006de6cc485259da988859aa Mon Sep 17 00:00:00 2001
From: John Daley <johndale@cisco.com>
Date: Tue, 5 Apr 2016 15:19:06 -0700
Subject: [PATCH 3/3] enic: Optimization of Tx path to reduce Host CPU
 overhead, cleanup

Optimizations and cleanup:
- flatten packet send path
- flatten mbuf free path
- disable CQ entry writing and use CQ messages instead
- use rte_mempool_put_bulk() to bulk return freed mbufs
- remove unnecessary fields vnic_bufs struct, use contiguous array of cache
  aligned divisible elements. No next pointers.
- use local variables inside per packet loop instead of fields in structs.
- factor book keeping out of the per packet tx loop where possible
  (removed several conditionals)
- put Tx and Rx code in 1 file (enic_rxtx.c)

Reviewed-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
---
 drivers/net/enic/Makefile            |   2 +-
 drivers/net/enic/base/enic_vnic_wq.h |  79 ------
 drivers/net/enic/base/vnic_cq.h      |  37 +--
 drivers/net/enic/base/vnic_rq.h      |   2 +-
 drivers/net/enic/base/vnic_wq.c      |  89 +++---
 drivers/net/enic/base/vnic_wq.h      | 113 +-------
 drivers/net/enic/enic.h              |  27 +-
 drivers/net/enic/enic_ethdev.c       |  67 +----
 drivers/net/enic/enic_main.c         | 132 +++------
 drivers/net/enic/enic_res.h          |  81 +-----
 drivers/net/enic/enic_rx.c           | 361 -------------------------
 drivers/net/enic/enic_rxtx.c         | 505 +++++++++++++++++++++++++++++++++++
 12 files changed, 635 insertions(+), 860 deletions(-)
 delete mode 100644 drivers/net/enic/base/enic_vnic_wq.h
 delete mode 100644 drivers/net/enic/enic_rx.c
 create mode 100644 drivers/net/enic/enic_rxtx.c

diff --git a/drivers/net/enic/Makefile b/drivers/net/enic/Makefile
index f316274..3926b79 100644
--- a/drivers/net/enic/Makefile
+++ b/drivers/net/enic/Makefile
@@ -53,7 +53,7 @@ VPATH += $(SRCDIR)/src
 #
 SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_ethdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_main.c
-SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_rx.c
+SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_rxtx.c
 SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_clsf.c
 SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic_res.c
 SRCS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += base/vnic_cq.c
diff --git a/drivers/net/enic/base/enic_vnic_wq.h b/drivers/net/enic/base/enic_vnic_wq.h
deleted file mode 100644
index b019109..0000000
--- a/drivers/net/enic/base/enic_vnic_wq.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright 2008-2015 Cisco Systems, Inc.  All rights reserved.
- * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
- *
- * Copyright (c) 2015, Cisco Systems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef _ENIC_VNIC_WQ_H_
-#define _ENIC_VNIC_WQ_H_
-
-#include "vnic_dev.h"
-#include "vnic_cq.h"
-
-static inline void enic_vnic_post_wq_index(struct vnic_wq *wq)
-{
-	struct vnic_wq_buf *buf = wq->to_use;
-
-	/* Adding write memory barrier prevents compiler and/or CPU
-	 * reordering, thus avoiding descriptor posting before
-	 * descriptor is initialized. Otherwise, hardware can read
-	 * stale descriptor fields.
-	*/
-	wmb();
-	iowrite32(buf->index, &wq->ctrl->posted_index);
-}
-
-static inline void enic_vnic_post_wq(struct vnic_wq *wq,
-				     void *os_buf, dma_addr_t dma_addr,
-				     unsigned int len, int sop,
-				     uint8_t desc_skip_cnt, uint8_t cq_entry,
-				     uint8_t compressed_send, uint64_t wrid)
-{
-	struct vnic_wq_buf *buf = wq->to_use;
-
-	buf->sop = sop;
-	buf->cq_entry = cq_entry;
-	buf->compressed_send = compressed_send;
-	buf->desc_skip_cnt = desc_skip_cnt;
-	buf->os_buf = os_buf;
-	buf->dma_addr = dma_addr;
-	buf->len = len;
-	buf->wr_id = wrid;
-
-	buf = buf->next;
-	wq->ring.desc_avail -= desc_skip_cnt;
-	wq->to_use = buf;
-
-	if (cq_entry)
-		enic_vnic_post_wq_index(wq);
-}
-
-#endif /* _ENIC_VNIC_WQ_H_ */
diff --git a/drivers/net/enic/base/vnic_cq.h b/drivers/net/enic/base/vnic_cq.h
index 922391b..ffc1aaa 100644
--- a/drivers/net/enic/base/vnic_cq.h
+++ b/drivers/net/enic/base/vnic_cq.h
@@ -96,41 +96,46 @@ static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
 	u8 type, u16 q_number, u16 completed_index, void *opaque),
 	void *opaque)
 {
-	struct cq_desc *cq_desc;
+	struct cq_desc *cq_desc, *cq_desc_last;
 	unsigned int work_done = 0;
 	u16 q_number, completed_index;
-	u8 type, color;
-	struct rte_mbuf **rx_pkts = opaque;
-	unsigned int ret;
+	u8 type, color, type_color;
 
 	cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
 		cq->ring.desc_size * cq->to_clean);
-	cq_desc_dec(cq_desc, &type, &color,
-		&q_number, &completed_index);
+
+	type_color = cq_desc->type_color;
+	color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK;
+	if (color == cq->last_color)
+		return 0;
 
 	while (color != cq->last_color) {
-		if (opaque)
-			opaque = (void *)&(rx_pkts[work_done]);
+		cq_desc_last = cq_desc;
 
-		ret = (*q_service)(cq->vdev, cq_desc, type,
-			q_number, completed_index, opaque);
 		cq->to_clean++;
 		if (cq->to_clean == cq->ring.desc_count) {
 			cq->to_clean = 0;
 			cq->last_color = cq->last_color ? 0 : 1;
 		}
 
+		work_done++;
+		if (work_done >= work_to_do)
+			break;
+
 		cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
 			cq->ring.desc_size * cq->to_clean);
-		cq_desc_dec(cq_desc, &type, &color,
-			&q_number, &completed_index);
 
-		if (ret)
-			work_done++;
-		if (work_done >= work_to_do)
-			break;
+		type_color = cq_desc->type_color;
+		color = (type_color >> CQ_DESC_COLOR_SHIFT)
+			& CQ_DESC_COLOR_MASK;
+
 	}
 
+	cq_desc_dec(cq_desc_last, &type, &color,
+		&q_number, &completed_index);
+
+	(*q_service)(cq->vdev, cq_desc, type,
+		q_number, completed_index, opaque);
 	return work_done;
 }
 
diff --git a/drivers/net/enic/base/vnic_rq.h b/drivers/net/enic/base/vnic_rq.h
index e083ccc..424415c 100644
--- a/drivers/net/enic/base/vnic_rq.h
+++ b/drivers/net/enic/base/vnic_rq.h
@@ -74,7 +74,7 @@ struct vnic_rq {
 	struct vnic_dev_ring ring;
 	struct rte_mbuf **mbuf_ring;		/* array of allocated mbufs */
 	unsigned int mbuf_next_idx;		/* next mb to consume */
-	void *os_buf_head;
+	void *mb_head;
 	unsigned int pkts_outstanding;
 	uint16_t rx_nb_hold;
 	uint16_t rx_free_thresh;
diff --git a/drivers/net/enic/base/vnic_wq.c b/drivers/net/enic/base/vnic_wq.c
index a3ef417..ccbbd61 100644
--- a/drivers/net/enic/base/vnic_wq.c
+++ b/drivers/net/enic/base/vnic_wq.c
@@ -59,71 +59,30 @@ int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
 
 static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
 {
-	struct vnic_wq_buf *buf;
-	unsigned int i, j, count = wq->ring.desc_count;
-	unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
-
-	for (i = 0; i < blks; i++) {
-		wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC);
-		if (!wq->bufs[i])
-			return -ENOMEM;
-	}
-
-	for (i = 0; i < blks; i++) {
-		buf = wq->bufs[i];
-		for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) {
-			buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j;
-			buf->desc = (u8 *)wq->ring.descs +
-				wq->ring.desc_size * buf->index;
-			if (buf->index + 1 == count) {
-				buf->next = wq->bufs[0];
-				break;
-			} else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) {
-				buf->next = wq->bufs[i + 1];
-			} else {
-				buf->next = buf + 1;
-				buf++;
-			}
-		}
-	}
-
-	wq->to_use = wq->to_clean = wq->bufs[0];
-
+	unsigned int count = wq->ring.desc_count;
+       /* Allocate the mbuf ring */
+	wq->bufs = (struct vnic_wq_buf *)rte_zmalloc_socket("wq->bufs",
+		    sizeof(struct vnic_wq_buf) * count,
+		    RTE_CACHE_LINE_SIZE, wq->socket_id);
+	wq->head_idx = 0;
+	wq->tail_idx = 0;
+	if (wq->bufs == NULL)
+		return -ENOMEM;
 	return 0;
 }
 
 void vnic_wq_free(struct vnic_wq *wq)
 {
 	struct vnic_dev *vdev;
-	unsigned int i;
 
 	vdev = wq->vdev;
 
 	vnic_dev_free_desc_ring(vdev, &wq->ring);
 
-	for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
-		if (wq->bufs[i]) {
-			kfree(wq->bufs[i]);
-			wq->bufs[i] = NULL;
-		}
-	}
-
+	rte_free(wq->bufs);
 	wq->ctrl = NULL;
 }
 
-int vnic_wq_mem_size(struct vnic_wq *wq, unsigned int desc_count,
-	unsigned int desc_size)
-{
-	int mem_size = 0;
-
-	mem_size += vnic_dev_desc_ring_size(&wq->ring, desc_count, desc_size);
-
-	mem_size += VNIC_WQ_BUF_BLKS_NEEDED(wq->ring.desc_count) *
-		VNIC_WQ_BUF_BLK_SZ(wq->ring.desc_count);
-
-	return mem_size;
-}
-
 
 int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
 	unsigned int desc_count, unsigned int desc_size)
@@ -172,9 +131,8 @@ void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
 	iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
 	iowrite32(0, &wq->ctrl->error_status);
 
-	wq->to_use = wq->to_clean =
-		&wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
-			[fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)];
+	wq->head_idx = fetch_index;
+	wq->tail_idx = wq->head_idx;
 }
 
 void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
@@ -184,6 +142,7 @@ void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
 	vnic_wq_init_start(wq, cq_index, 0, 0,
 		error_interrupt_enable,
 		error_interrupt_offset);
+	wq->last_completed_index = 0;
 }
 
 void vnic_wq_error_out(struct vnic_wq *wq, unsigned int error)
@@ -219,22 +178,34 @@ int vnic_wq_disable(struct vnic_wq *wq)
 	return -ETIMEDOUT;
 }
 
+static inline uint32_t
+buf_idx_incr(uint32_t n_descriptors, uint32_t idx)
+{
+	idx++;
+	if (unlikely(idx == n_descriptors))
+		idx = 0;
+	return idx;
+}
+
 void vnic_wq_clean(struct vnic_wq *wq,
-	void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
+		   void (*buf_clean)(struct vnic_wq_buf *buf))
 {
 	struct vnic_wq_buf *buf;
+	unsigned int  to_clean = wq->tail_idx;
 
-	buf = wq->to_clean;
+	buf = &wq->bufs[to_clean];
 
 	while (vnic_wq_desc_used(wq) > 0) {
 
-		(*buf_clean)(wq, buf);
+		(*buf_clean)(buf);
+		to_clean = buf_idx_incr(wq->ring.desc_count, to_clean);
 
-		buf = wq->to_clean = buf->next;
+		buf = &wq->bufs[to_clean];
 		wq->ring.desc_avail++;
 	}
 
-	wq->to_use = wq->to_clean = wq->bufs[0];
+	wq->head_idx = 0;
+	wq->tail_idx = 0;
 
 	iowrite32(0, &wq->ctrl->fetch_index);
 	iowrite32(0, &wq->ctrl->posted_index);
diff --git a/drivers/net/enic/base/vnic_wq.h b/drivers/net/enic/base/vnic_wq.h
index c23de62..37c3ff9 100644
--- a/drivers/net/enic/base/vnic_wq.h
+++ b/drivers/net/enic/base/vnic_wq.h
@@ -64,42 +64,23 @@ struct vnic_wq_ctrl {
 	u32 pad9;
 };
 
+/* 16 bytes */
 struct vnic_wq_buf {
-	struct vnic_wq_buf *next;
-	dma_addr_t dma_addr;
-	void *os_buf;
-	unsigned int len;
-	unsigned int index;
-	int sop;
-	void *desc;
-	uint64_t wr_id; /* Cookie */
-	uint8_t cq_entry; /* Gets completion event from hw */
-	uint8_t desc_skip_cnt; /* Num descs to occupy */
-	uint8_t compressed_send; /* Both hdr and payload in one desc */
+	struct rte_mempool *pool;
+	void *mb;
 };
 
-/* Break the vnic_wq_buf allocations into blocks of 32/64 entries */
-#define VNIC_WQ_BUF_MIN_BLK_ENTRIES 32
-#define VNIC_WQ_BUF_DFLT_BLK_ENTRIES 64
-#define VNIC_WQ_BUF_BLK_ENTRIES(entries) \
-	((unsigned int)((entries < VNIC_WQ_BUF_DFLT_BLK_ENTRIES) ? \
-	VNIC_WQ_BUF_MIN_BLK_ENTRIES : VNIC_WQ_BUF_DFLT_BLK_ENTRIES))
-#define VNIC_WQ_BUF_BLK_SZ(entries) \
-	(VNIC_WQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_wq_buf))
-#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
-	DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES(entries))
-#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
-
 struct vnic_wq {
 	unsigned int index;
 	struct vnic_dev *vdev;
 	struct vnic_wq_ctrl __iomem *ctrl;              /* memory-mapped */
 	struct vnic_dev_ring ring;
-	struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
-	struct vnic_wq_buf *to_use;
-	struct vnic_wq_buf *to_clean;
-	unsigned int pkts_outstanding;
+	struct vnic_wq_buf *bufs;
+	unsigned int head_idx;
+	unsigned int tail_idx;
 	unsigned int socket_id;
+	const struct rte_memzone *cqmsg_rz;
+	uint16_t last_completed_index;
 };
 
 static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
@@ -114,11 +95,6 @@ static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
 	return wq->ring.desc_count - wq->ring.desc_avail - 1;
 }
 
-static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
-{
-	return wq->to_use->desc;
-}
-
 #define PI_LOG2_CACHE_LINE_SIZE        5
 #define PI_INDEX_BITS            12
 #define PI_INDEX_MASK ((1U << PI_INDEX_BITS) - 1)
@@ -191,75 +167,6 @@ static inline u64 vnic_cached_posted_index(dma_addr_t addr, unsigned int len,
 	PI_PREFETCH_ADDR_MASK) << PI_PREFETCH_ADDR_OFF);
 }
 
-static inline void vnic_wq_post(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr,
-	unsigned int len, int sop, int eop,
-	uint8_t desc_skip_cnt, uint8_t cq_entry,
-	uint8_t compressed_send, uint64_t wrid)
-{
-	struct vnic_wq_buf *buf = wq->to_use;
-
-	buf->sop = sop;
-	buf->cq_entry = cq_entry;
-	buf->compressed_send = compressed_send;
-	buf->desc_skip_cnt = desc_skip_cnt;
-	buf->os_buf = os_buf;
-	buf->dma_addr = dma_addr;
-	buf->len = len;
-	buf->wr_id = wrid;
-
-	buf = buf->next;
-	if (eop) {
-#ifdef DO_PREFETCH
-		uint64_t wr = vnic_cached_posted_index(dma_addr, len,
-							buf->index);
-#endif
-		/* Adding write memory barrier prevents compiler and/or CPU
-		 * reordering, thus avoiding descriptor posting before
-		 * descriptor is initialized. Otherwise, hardware can read
-		 * stale descriptor fields.
-		 */
-		wmb();
-#ifdef DO_PREFETCH
-		/* Intel chipsets seem to limit the rate of PIOs that we can
-		 * push on the bus.  Thus, it is very important to do a single
-		 * 64 bit write here.  With two 32-bit writes, my maximum
-		 * pkt/sec rate was cut almost in half. -AJF
-		 */
-		iowrite64((uint64_t)wr, &wq->ctrl->posted_index);
-#else
-		iowrite32(buf->index, &wq->ctrl->posted_index);
-#endif
-	}
-	wq->to_use = buf;
-
-	wq->ring.desc_avail -= desc_skip_cnt;
-}
-
-static inline void vnic_wq_service(struct vnic_wq *wq,
-	struct cq_desc *cq_desc, u16 completed_index,
-	void (*buf_service)(struct vnic_wq *wq,
-	struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
-	void *opaque)
-{
-	struct vnic_wq_buf *buf;
-
-	buf = wq->to_clean;
-	while (1) {
-
-		(*buf_service)(wq, cq_desc, buf, opaque);
-
-		wq->ring.desc_avail++;
-
-		wq->to_clean = buf->next;
-
-		if (buf->index == completed_index)
-			break;
-
-		buf = wq->to_clean;
-	}
-}
-
 void vnic_wq_free(struct vnic_wq *wq);
 int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
 	unsigned int desc_count, unsigned int desc_size);
@@ -275,8 +182,6 @@ unsigned int vnic_wq_error_status(struct vnic_wq *wq);
 void vnic_wq_enable(struct vnic_wq *wq);
 int vnic_wq_disable(struct vnic_wq *wq);
 void vnic_wq_clean(struct vnic_wq *wq,
-	void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
-int vnic_wq_mem_size(struct vnic_wq *wq, unsigned int desc_count,
-	unsigned int desc_size);
+	void (*buf_clean)(struct vnic_wq_buf *buf));
 
 #endif /* _VNIC_WQ_H_ */
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 8c914f5..43b82a6 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -155,6 +155,30 @@ static inline struct enic *pmd_priv(struct rte_eth_dev *eth_dev)
 	return (struct enic *)eth_dev->data->dev_private;
 }
 
+static inline uint32_t
+enic_ring_add(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
+{
+	uint32_t d = i0 + i1;
+	d -= (d >= n_descriptors) ? n_descriptors : 0;
+	return d;
+}
+
+static inline uint32_t
+enic_ring_sub(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
+{
+	int32_t d = i1 - i0;
+	return (uint32_t)((d < 0) ? ((int32_t)n_descriptors + d) : d);
+}
+
+static inline uint32_t
+enic_ring_incr(uint32_t n_descriptors, uint32_t idx)
+{
+	idx++;
+	if (unlikely(idx == n_descriptors))
+		idx = 0;
+	return idx;
+}
+
 #define RTE_LIBRTE_ENIC_ASSERT_ENABLE
 #ifdef RTE_LIBRTE_ENIC_ASSERT_ENABLE
 #define ASSERT(x) do {			\
@@ -209,5 +233,6 @@ extern int enic_clsf_init(struct enic *enic);
 extern void enic_clsf_destroy(struct enic *enic);
 uint16_t enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 			uint16_t nb_pkts);
-
+uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+			uint16_t nb_pkts);
 #endif /* _ENIC_H_ */
diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index 6bea940..697ff82 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -519,71 +519,6 @@ static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, __rte_unused ui
 	enic_del_mac_address(enic);
 }
 
-
-static uint16_t enicpmd_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
-	uint16_t nb_pkts)
-{
-	uint16_t index;
-	unsigned int frags;
-	unsigned int pkt_len;
-	unsigned int seg_len;
-	unsigned int inc_len;
-	unsigned int nb_segs;
-	struct rte_mbuf *tx_pkt, *next_tx_pkt;
-	struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
-	struct enic *enic = vnic_dev_priv(wq->vdev);
-	unsigned short vlan_id;
-	unsigned short ol_flags;
-	uint8_t last_seg, eop;
-	unsigned int host_tx_descs = 0;
-
-	for (index = 0; index < nb_pkts; index++) {
-		tx_pkt = *tx_pkts++;
-		inc_len = 0;
-		nb_segs = tx_pkt->nb_segs;
-		if (nb_segs > vnic_wq_desc_avail(wq)) {
-			if (index > 0)
-				enic_post_wq_index(wq);
-
-			/* wq cleanup and try again */
-			if (!enic_cleanup_wq(enic, wq) ||
-				(nb_segs > vnic_wq_desc_avail(wq))) {
-				return index;
-			}
-		}
-
-		pkt_len = tx_pkt->pkt_len;
-		vlan_id = tx_pkt->vlan_tci;
-		ol_flags = tx_pkt->ol_flags;
-		for (frags = 0; inc_len < pkt_len; frags++) {
-			if (!tx_pkt)
-				break;
-			next_tx_pkt = tx_pkt->next;
-			seg_len = tx_pkt->data_len;
-			inc_len += seg_len;
-
-			host_tx_descs++;
-			last_seg = 0;
-			eop = 0;
-			if ((pkt_len == inc_len) || !next_tx_pkt) {
-				eop = 1;
-				/* post if last packet in batch or > thresh */
-				if ((index == (nb_pkts - 1)) ||
-				   (host_tx_descs > ENIC_TX_POST_THRESH)) {
-					last_seg = 1;
-					host_tx_descs = 0;
-				}
-			}
-			enic_send_pkt(enic, wq, tx_pkt, (unsigned short)seg_len,
-				      !frags, eop, last_seg, ol_flags, vlan_id);
-			tx_pkt = next_tx_pkt;
-		}
-	}
-
-	enic_cleanup_wq(enic, wq);
-	return index;
-}
-
 static const struct eth_dev_ops enicpmd_eth_dev_ops = {
 	.dev_configure        = enicpmd_dev_configure,
 	.dev_start            = enicpmd_dev_start,
@@ -642,7 +577,7 @@ static int eth_enicpmd_dev_init(struct rte_eth_dev *eth_dev)
 	enic->rte_dev = eth_dev;
 	eth_dev->dev_ops = &enicpmd_eth_dev_ops;
 	eth_dev->rx_pkt_burst = &enic_recv_pkts;
-	eth_dev->tx_pkt_burst = &enicpmd_xmit_pkts;
+	eth_dev->tx_pkt_burst = &enic_xmit_pkts;
 
 	pdev = eth_dev->pci_dev;
 	rte_eth_copy_pci_info(eth_dev, pdev);
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 646d87f..ba73604 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -40,11 +40,11 @@
 #include <libgen.h>
 
 #include <rte_pci.h>
-#include <rte_memzone.h>
 #include <rte_malloc.h>
 #include <rte_mbuf.h>
 #include <rte_string_fns.h>
 #include <rte_ethdev.h>
+#include <rte_memzone.h>
 
 #include "enic_compat.h"
 #include "enic.h"
@@ -58,7 +58,6 @@
 #include "vnic_cq.h"
 #include "vnic_intr.h"
 #include "vnic_nic.h"
-#include "enic_vnic_wq.h"
 
 static inline struct rte_mbuf *
 rte_rxmbuf_alloc(struct rte_mempool *mp)
@@ -109,38 +108,17 @@ enic_rxmbuf_queue_release(struct enic *enic, struct vnic_rq *rq)
 	}
 }
 
-
 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 {
 	vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 }
 
-static void enic_free_wq_buf(__rte_unused struct vnic_wq *wq, struct vnic_wq_buf *buf)
+static void enic_free_wq_buf(struct vnic_wq_buf *buf)
 {
-	struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->os_buf;
+	struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
 
 	rte_mempool_put(mbuf->pool, mbuf);
-	buf->os_buf = NULL;
-}
-
-static void enic_wq_free_buf(struct vnic_wq *wq,
-	__rte_unused struct cq_desc *cq_desc,
-	struct vnic_wq_buf *buf,
-	__rte_unused void *opaque)
-{
-	enic_free_wq_buf(wq, buf);
-}
-
-static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
-	__rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
-{
-	struct enic *enic = vnic_dev_priv(vdev);
-
-	vnic_wq_service(&enic->wq[q_number], cq_desc,
-		completed_index, enic_wq_free_buf,
-		opaque);
-
-	return 0;
+	buf->mb = NULL;
 }
 
 static void enic_log_q_error(struct enic *enic)
@@ -163,64 +141,6 @@ static void enic_log_q_error(struct enic *enic)
 	}
 }
 
-unsigned int enic_cleanup_wq(struct enic *enic, struct vnic_wq *wq)
-{
-	unsigned int cq = enic_cq_wq(enic, wq->index);
-
-	/* Return the work done */
-	return vnic_cq_service(&enic->cq[cq],
-		-1 /*wq_work_to_do*/, enic_wq_service, NULL);
-}
-
-void enic_post_wq_index(struct vnic_wq *wq)
-{
-	enic_vnic_post_wq_index(wq);
-}
-
-void enic_send_pkt(struct enic *enic, struct vnic_wq *wq,
-		   struct rte_mbuf *tx_pkt, unsigned short len,
-		   uint8_t sop, uint8_t eop, uint8_t cq_entry,
-		   uint16_t ol_flags, uint16_t vlan_tag)
-{
-	struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
-	uint16_t mss = 0;
-	uint8_t vlan_tag_insert = 0;
-	uint64_t bus_addr = (dma_addr_t)
-	    (tx_pkt->buf_physaddr + tx_pkt->data_off);
-
-	if (sop) {
-		if (ol_flags & PKT_TX_VLAN_PKT)
-			vlan_tag_insert = 1;
-
-		if (enic->hw_ip_checksum) {
-			if (ol_flags & PKT_TX_IP_CKSUM)
-				mss |= ENIC_CALC_IP_CKSUM;
-
-			if (ol_flags & PKT_TX_TCP_UDP_CKSUM)
-				mss |= ENIC_CALC_TCP_UDP_CKSUM;
-		}
-	}
-
-	wq_enet_desc_enc(desc,
-		bus_addr,
-		len,
-		mss,
-		0 /* header_length */,
-		0 /* offload_mode WQ_ENET_OFFLOAD_MODE_CSUM */,
-		eop,
-		cq_entry,
-		0 /* fcoe_encap */,
-		vlan_tag_insert,
-		vlan_tag,
-		0 /* loopback */);
-
-	enic_vnic_post_wq(wq, (void *)tx_pkt, bus_addr, len,
-			  sop,
-			  1 /*desc_skip_cnt*/,
-			  cq_entry,
-			  0 /*compressed send*/,
-			  0 /*wrid*/);
-}
 
 void enic_dev_stats_clear(struct enic *enic)
 {
@@ -297,12 +217,28 @@ void enic_init_vnic_resources(struct enic *enic)
 	unsigned int error_interrupt_enable = 1;
 	unsigned int error_interrupt_offset = 0;
 	unsigned int index = 0;
+	unsigned int cq_idx;
+
+	vnic_dev_stats_clear(enic->vdev);
 
 	for (index = 0; index < enic->rq_count; index++) {
 		vnic_rq_init(&enic->rq[index],
 			enic_cq_rq(enic, index),
 			error_interrupt_enable,
 			error_interrupt_offset);
+
+		cq_idx = enic_cq_rq(enic, index);
+		vnic_cq_init(&enic->cq[cq_idx],
+			0 /* flow_control_enable */,
+			1 /* color_enable */,
+			0 /* cq_head */,
+			0 /* cq_tail */,
+			1 /* cq_tail_color */,
+			0 /* interrupt_enable */,
+			1 /* cq_entry_enable */,
+			0 /* cq_message_enable */,
+			0 /* interrupt offset */,
+			0 /* cq_message_addr */);
 	}
 
 	for (index = 0; index < enic->wq_count; index++) {
@@ -310,22 +246,19 @@ void enic_init_vnic_resources(struct enic *enic)
 			enic_cq_wq(enic, index),
 			error_interrupt_enable,
 			error_interrupt_offset);
-	}
-
-	vnic_dev_stats_clear(enic->vdev);
 
-	for (index = 0; index < enic->cq_count; index++) {
-		vnic_cq_init(&enic->cq[index],
+		cq_idx = enic_cq_wq(enic, index);
+		vnic_cq_init(&enic->cq[cq_idx],
 			0 /* flow_control_enable */,
 			1 /* color_enable */,
 			0 /* cq_head */,
 			0 /* cq_tail */,
 			1 /* cq_tail_color */,
 			0 /* interrupt_enable */,
-			1 /* cq_entry_enable */,
-			0 /* cq_message_enable */,
+			0 /* cq_entry_enable */,
+			1 /* cq_message_enable */,
 			0 /* interrupt offset */,
-			0 /* cq_message_addr */);
+			(u64)enic->wq[index].cqmsg_rz->phys_addr);
 	}
 
 	vnic_intr_init(&enic->intr,
@@ -569,6 +502,7 @@ void enic_free_wq(void *txq)
 	struct vnic_wq *wq = (struct vnic_wq *)txq;
 	struct enic *enic = vnic_dev_priv(wq->vdev);
 
+	rte_memzone_free(wq->cqmsg_rz);
 	vnic_wq_free(wq);
 	vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 }
@@ -579,6 +513,8 @@ int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 	int err;
 	struct vnic_wq *wq = &enic->wq[queue_idx];
 	unsigned int cq_index = enic_cq_wq(enic, queue_idx);
+	char name[NAME_MAX];
+	static int instance;
 
 	wq->socket_id = socket_id;
 	if (nb_desc) {
@@ -614,6 +550,18 @@ int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 		dev_err(enic, "error in allocation of cq for wq\n");
 	}
 
+	/* setup up CQ message */
+	snprintf((char *)name, sizeof(name),
+		 "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
+		instance++);
+
+	wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
+						   sizeof(uint32_t),
+						   SOCKET_ID_ANY, 0,
+						   ENIC_ALIGN);
+	if (!wq->cqmsg_rz)
+		return -ENOMEM;
+
 	return err;
 }
 
diff --git a/drivers/net/enic/enic_res.h b/drivers/net/enic/enic_res.h
index 00fa71d..3e1bdf5 100644
--- a/drivers/net/enic/enic_res.h
+++ b/drivers/net/enic/enic_res.h
@@ -53,89 +53,10 @@
 
 #define ENIC_NON_TSO_MAX_DESC		16
 #define ENIC_DEFAULT_RX_FREE_THRESH	32
-#define ENIC_TX_POST_THRESH		(ENIC_MIN_WQ_DESCS / 2)
+#define ENIC_TX_XMIT_MAX		64
 
 #define ENIC_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
 
-static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr, unsigned int len,
-	unsigned int mss_or_csum_offset, unsigned int hdr_len,
-	int vlan_tag_insert, unsigned int vlan_tag,
-	int offload_mode, int cq_entry, int sop, int eop, int loopback)
-{
-	struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
-	u8 desc_skip_cnt = 1;
-	u8 compressed_send = 0;
-	u64 wrid = 0;
-
-	wq_enet_desc_enc(desc,
-		(u64)dma_addr | VNIC_PADDR_TARGET,
-		(u16)len,
-		(u16)mss_or_csum_offset,
-		(u16)hdr_len, (u8)offload_mode,
-		(u8)eop, (u8)cq_entry,
-		0, /* fcoe_encap */
-		(u8)vlan_tag_insert,
-		(u16)vlan_tag,
-		(u8)loopback);
-
-	vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop, desc_skip_cnt,
-			(u8)cq_entry, compressed_send, wrid);
-}
-
-static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr, unsigned int len,
-	int eop, int loopback)
-{
-	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
-		0, 0, 0, 0, 0,
-		eop, 0 /* !SOP */, eop, loopback);
-}
-
-static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
-	dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
-	unsigned int vlan_tag, int eop, int loopback)
-{
-	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
-		0, 0, vlan_tag_insert, vlan_tag,
-		WQ_ENET_OFFLOAD_MODE_CSUM,
-		eop, 1 /* SOP */, eop, loopback);
-}
-
-static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr, unsigned int len,
-	int ip_csum, int tcpudp_csum, int vlan_tag_insert,
-	unsigned int vlan_tag, int eop, int loopback)
-{
-	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
-		(ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
-		0, vlan_tag_insert, vlan_tag,
-		WQ_ENET_OFFLOAD_MODE_CSUM,
-		eop, 1 /* SOP */, eop, loopback);
-}
-
-static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr, unsigned int len,
-	unsigned int csum_offset, unsigned int hdr_len,
-	int vlan_tag_insert, unsigned int vlan_tag, int eop, int loopback)
-{
-	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
-		csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
-		WQ_ENET_OFFLOAD_MODE_CSUM_L4,
-		eop, 1 /* SOP */, eop, loopback);
-}
-
-static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
-	void *os_buf, dma_addr_t dma_addr, unsigned int len,
-	unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
-	unsigned int vlan_tag, int eop, int loopback)
-{
-	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
-		mss, hdr_len, vlan_tag_insert, vlan_tag,
-		WQ_ENET_OFFLOAD_MODE_TSO,
-		eop, 1 /* SOP */, eop, loopback);
-}
-
 struct enic;
 
 int enic_get_vnic_config(struct enic *);
diff --git a/drivers/net/enic/enic_rx.c b/drivers/net/enic/enic_rx.c
deleted file mode 100644
index 39bb55c..0000000
--- a/drivers/net/enic/enic_rx.c
+++ /dev/null
@@ -1,361 +0,0 @@
-/*
- * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
- * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
- *
- * Copyright (c) 2014, Cisco Systems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <rte_mbuf.h>
-#include <rte_ethdev.h>
-#include <rte_prefetch.h>
-
-#include "enic_compat.h"
-#include "rq_enet_desc.h"
-#include "enic.h"
-
-#define RTE_PMD_USE_PREFETCH
-
-#ifdef RTE_PMD_USE_PREFETCH
-/*
- * Prefetch a cache line into all cache levels.
- */
-#define rte_enic_prefetch(p) rte_prefetch0(p)
-#else
-#define rte_enic_prefetch(p) do {} while (0)
-#endif
-
-#ifdef RTE_PMD_PACKET_PREFETCH
-#define rte_packet_prefetch(p) rte_prefetch1(p)
-#else
-#define rte_packet_prefetch(p) do {} while (0)
-#endif
-
-static inline struct rte_mbuf *
-rte_rxmbuf_alloc(struct rte_mempool *mp)
-{
-	struct rte_mbuf *m;
-
-	m = __rte_mbuf_raw_alloc(mp);
-	__rte_mbuf_sanity_check_raw(m, 0);
-	return m;
-}
-
-static inline uint16_t
-enic_cq_rx_desc_ciflags(struct cq_enet_rq_desc *crd)
-{
-	return le16_to_cpu(crd->completed_index_flags) & ~CQ_DESC_COMP_NDX_MASK;
-}
-
-static inline uint16_t
-enic_cq_rx_desc_bwflags(struct cq_enet_rq_desc *crd)
-{
-	return(le16_to_cpu(crd->bytes_written_flags) &
-		~CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_packet_error(uint16_t bwflags)
-{
-	return((bwflags & CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ==
-		CQ_ENET_RQ_DESC_FLAGS_TRUNCATED);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_eop(uint16_t ciflags)
-{
-	return (ciflags & CQ_ENET_RQ_DESC_FLAGS_EOP)
-		== CQ_ENET_RQ_DESC_FLAGS_EOP;
-}
-
-static inline uint8_t
-enic_cq_rx_desc_csum_not_calc(struct cq_enet_rq_desc *cqrd)
-{
-	return ((le16_to_cpu(cqrd->q_number_rss_type_flags) &
-		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ==
-		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_ipv4_csum_ok(struct cq_enet_rq_desc *cqrd)
-{
-	return ((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ==
-		CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_tcp_udp_csum_ok(struct cq_enet_rq_desc *cqrd)
-{
-	return((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ==
-		CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK);
-}
-
-static inline uint8_t
-enic_cq_rx_desc_rss_type(struct cq_enet_rq_desc *cqrd)
-{
-	return (uint8_t)((le16_to_cpu(cqrd->q_number_rss_type_flags) >>
-		CQ_DESC_Q_NUM_BITS) & CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
-}
-
-static inline uint32_t
-enic_cq_rx_desc_rss_hash(struct cq_enet_rq_desc *cqrd)
-{
-	return le32_to_cpu(cqrd->rss_hash);
-}
-
-static inline uint16_t
-enic_cq_rx_desc_vlan(struct cq_enet_rq_desc *cqrd)
-{
-	return le16_to_cpu(cqrd->vlan);
-}
-
-static inline uint16_t
-enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
-{
-	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
-	return le16_to_cpu(cqrd->bytes_written_flags) &
-		CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
-}
-
-static inline uint8_t
-enic_cq_rx_to_pkt_err_flags(struct cq_desc *cqd, uint64_t *pkt_err_flags_out)
-{
-	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
-	uint16_t bwflags;
-	int ret = 0;
-	uint64_t pkt_err_flags = 0;
-
-	bwflags = enic_cq_rx_desc_bwflags(cqrd);
-	if (unlikely(enic_cq_rx_desc_packet_error(bwflags))) {
-		pkt_err_flags = PKT_RX_MAC_ERR;
-		ret = 1;
-	}
-	*pkt_err_flags_out = pkt_err_flags;
-	return ret;
-}
-
-/*
- * Lookup table to translate RX CQ flags to mbuf flags.
- */
-static inline uint32_t
-enic_cq_rx_flags_to_pkt_type(struct cq_desc *cqd)
-{
-	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
-	uint8_t cqrd_flags = cqrd->flags;
-	static const uint32_t cq_type_table[128] __rte_cache_aligned = {
-		[32] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4,
-		[34] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
-			| RTE_PTYPE_L4_UDP,
-		[36] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
-			| RTE_PTYPE_L4_TCP,
-		[96] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
-			| RTE_PTYPE_L4_FRAG,
-		[16] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6,
-		[18] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
-			| RTE_PTYPE_L4_UDP,
-		[20] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
-			| RTE_PTYPE_L4_TCP,
-		[80] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
-			| RTE_PTYPE_L4_FRAG,
-		/* All others reserved */
-	};
-	cqrd_flags &= CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT
-		| CQ_ENET_RQ_DESC_FLAGS_IPV4 | CQ_ENET_RQ_DESC_FLAGS_IPV6
-		| CQ_ENET_RQ_DESC_FLAGS_TCP | CQ_ENET_RQ_DESC_FLAGS_UDP;
-	return cq_type_table[cqrd_flags];
-}
-
-static inline void
-enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf)
-{
-	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
-	uint16_t ciflags, bwflags, pkt_flags = 0;
-	ciflags = enic_cq_rx_desc_ciflags(cqrd);
-	bwflags = enic_cq_rx_desc_bwflags(cqrd);
-
-	mbuf->ol_flags = 0;
-
-	/* flags are meaningless if !EOP */
-	if (unlikely(!enic_cq_rx_desc_eop(ciflags)))
-		goto mbuf_flags_done;
-
-	/* VLAN stripping */
-	if (bwflags & CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) {
-		pkt_flags |= PKT_RX_VLAN_PKT;
-		mbuf->vlan_tci = enic_cq_rx_desc_vlan(cqrd);
-	} else {
-		mbuf->vlan_tci = 0;
-	}
-
-	/* RSS flag */
-	if (enic_cq_rx_desc_rss_type(cqrd)) {
-		pkt_flags |= PKT_RX_RSS_HASH;
-		mbuf->hash.rss = enic_cq_rx_desc_rss_hash(cqrd);
-	}
-
-	/* checksum flags */
-	if (!enic_cq_rx_desc_csum_not_calc(cqrd) &&
-		(mbuf->packet_type & RTE_PTYPE_L3_IPV4)) {
-		if (unlikely(!enic_cq_rx_desc_ipv4_csum_ok(cqrd)))
-			pkt_flags |= PKT_RX_IP_CKSUM_BAD;
-		if (mbuf->packet_type & (RTE_PTYPE_L4_UDP | RTE_PTYPE_L4_TCP)) {
-			if (unlikely(!enic_cq_rx_desc_tcp_udp_csum_ok(cqrd)))
-				pkt_flags |= PKT_RX_L4_CKSUM_BAD;
-		}
-	}
-
- mbuf_flags_done:
-	mbuf->ol_flags = pkt_flags;
-}
-
-static inline uint32_t
-enic_ring_add(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
-{
-	uint32_t d = i0 + i1;
-	ASSERT(i0 < n_descriptors);
-	ASSERT(i1 < n_descriptors);
-	d -= (d >= n_descriptors) ? n_descriptors : 0;
-	return d;
-}
-
-
-uint16_t
-enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
-	       uint16_t nb_pkts)
-{
-	struct vnic_rq *rq = rx_queue;
-	struct enic *enic = vnic_dev_priv(rq->vdev);
-	unsigned int rx_id;
-	struct rte_mbuf *nmb, *rxmb;
-	uint16_t nb_rx = 0;
-	uint16_t nb_hold;
-	struct vnic_cq *cq;
-	volatile struct cq_desc *cqd_ptr;
-	uint8_t color;
-
-	cq = &enic->cq[enic_cq_rq(enic, rq->index)];
-	rx_id = cq->to_clean;		/* index of cqd, rqd, mbuf_table */
-	cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
-
-	nb_hold = rq->rx_nb_hold;	/* mbufs held by software */
-
-	while (nb_rx < nb_pkts) {
-		volatile struct rq_enet_desc *rqd_ptr;
-		dma_addr_t dma_addr;
-		struct cq_desc cqd;
-		uint64_t ol_err_flags;
-		uint8_t packet_error;
-
-		/* Check for pkts available */
-		color = (cqd_ptr->type_color >> CQ_DESC_COLOR_SHIFT)
-			& CQ_DESC_COLOR_MASK;
-		if (color == cq->last_color)
-			break;
-
-		/* Get the cq descriptor and rq pointer */
-		cqd = *cqd_ptr;
-		rqd_ptr = (struct rq_enet_desc *)(rq->ring.descs) + rx_id;
-
-		/* allocate a new mbuf */
-		nmb = rte_rxmbuf_alloc(rq->mp);
-		if (nmb == NULL) {
-			dev_err(enic, "RX mbuf alloc failed port=%u qid=%u",
-			enic->port_id, (unsigned)rq->index);
-			rte_eth_devices[enic->port_id].
-					data->rx_mbuf_alloc_failed++;
-			break;
-		}
-
-		/* A packet error means descriptor and data are untrusted */
-		packet_error = enic_cq_rx_to_pkt_err_flags(&cqd, &ol_err_flags);
-
-		/* Get the mbuf to return and replace with one just allocated */
-		rxmb = rq->mbuf_ring[rx_id];
-		rq->mbuf_ring[rx_id] = nmb;
-
-		/* Increment cqd, rqd, mbuf_table index */
-		rx_id++;
-		if (unlikely(rx_id == rq->ring.desc_count)) {
-			rx_id = 0;
-			cq->last_color = cq->last_color ? 0 : 1;
-		}
-
-		/* Prefetch next mbuf & desc while processing current one */
-		cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
-		rte_enic_prefetch(cqd_ptr);
-		rte_enic_prefetch(rq->mbuf_ring[rx_id]);
-		rte_enic_prefetch((struct rq_enet_desc *)(rq->ring.descs)
-				 + rx_id);
-
-		/* Push descriptor for newly allocated mbuf */
-		dma_addr = (dma_addr_t)(nmb->buf_physaddr
-			   + RTE_PKTMBUF_HEADROOM);
-		rqd_ptr->address = rte_cpu_to_le_64(dma_addr);
-		rqd_ptr->length_type = cpu_to_le16(nmb->buf_len
-				       - RTE_PKTMBUF_HEADROOM);
-
-		/* Fill in the rest of the mbuf */
-		rxmb->data_off = RTE_PKTMBUF_HEADROOM;
-		rxmb->nb_segs = 1;
-		rxmb->next = NULL;
-		rxmb->port = enic->port_id;
-		if (!packet_error) {
-			rxmb->pkt_len = enic_cq_rx_desc_n_bytes(&cqd);
-			rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
-			enic_cq_rx_to_pkt_flags(&cqd, rxmb);
-		} else {
-			rxmb->pkt_len = 0;
-			rxmb->packet_type = 0;
-			rxmb->ol_flags = 0;
-		}
-		rxmb->data_len = rxmb->pkt_len;
-
-		/* prefetch mbuf data for caller */
-		rte_packet_prefetch(RTE_PTR_ADD(rxmb->buf_addr,
-				    RTE_PKTMBUF_HEADROOM));
-
-		/* store the mbuf address into the next entry of the array */
-		rx_pkts[nb_rx++] = rxmb;
-	}
-
-	nb_hold += nb_rx;
-	cq->to_clean = rx_id;
-
-	if (nb_hold > rq->rx_free_thresh) {
-		rq->posted_index = enic_ring_add(rq->ring.desc_count,
-				rq->posted_index, nb_hold);
-		nb_hold = 0;
-		rte_mb();
-		iowrite32(rq->posted_index, &rq->ctrl->posted_index);
-	}
-
-	rq->rx_nb_hold = nb_hold;
-
-	return nb_rx;
-}
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
new file mode 100644
index 0000000..71ca34e
--- /dev/null
+++ b/drivers/net/enic/enic_rxtx.c
@@ -0,0 +1,505 @@
+/*
+ * Copyright 2008-2016 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * Copyright (c) 2016, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_prefetch.h>
+#include <rte_memzone.h>
+
+#include "enic_compat.h"
+#include "rq_enet_desc.h"
+#include "enic.h"
+
+#define RTE_PMD_USE_PREFETCH
+
+#ifdef RTE_PMD_USE_PREFETCH
+/*
+ * Prefetch a cache line into all cache levels.
+ */
+#define rte_enic_prefetch(p) rte_prefetch0(p)
+#else
+#define rte_enic_prefetch(p) do {} while (0)
+#endif
+
+#ifdef RTE_PMD_PACKET_PREFETCH
+#define rte_packet_prefetch(p) rte_prefetch1(p)
+#else
+#define rte_packet_prefetch(p) do {} while (0)
+#endif
+
+static inline struct rte_mbuf *
+rte_rxmbuf_alloc(struct rte_mempool *mp)
+{
+	struct rte_mbuf *m;
+
+	m = __rte_mbuf_raw_alloc(mp);
+	__rte_mbuf_sanity_check_raw(m, 0);
+	return m;
+}
+
+static inline uint16_t
+enic_cq_rx_desc_ciflags(struct cq_enet_rq_desc *crd)
+{
+	return le16_to_cpu(crd->completed_index_flags) & ~CQ_DESC_COMP_NDX_MASK;
+}
+
+static inline uint16_t
+enic_cq_rx_desc_bwflags(struct cq_enet_rq_desc *crd)
+{
+	return(le16_to_cpu(crd->bytes_written_flags) &
+		~CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK);
+}
+
+static inline uint8_t
+enic_cq_rx_desc_packet_error(uint16_t bwflags)
+{
+	return((bwflags & CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ==
+		CQ_ENET_RQ_DESC_FLAGS_TRUNCATED);
+}
+
+static inline uint8_t
+enic_cq_rx_desc_eop(uint16_t ciflags)
+{
+	return (ciflags & CQ_ENET_RQ_DESC_FLAGS_EOP)
+		== CQ_ENET_RQ_DESC_FLAGS_EOP;
+}
+
+static inline uint8_t
+enic_cq_rx_desc_csum_not_calc(struct cq_enet_rq_desc *cqrd)
+{
+	return ((le16_to_cpu(cqrd->q_number_rss_type_flags) &
+		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ==
+		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC);
+}
+
+static inline uint8_t
+enic_cq_rx_desc_ipv4_csum_ok(struct cq_enet_rq_desc *cqrd)
+{
+	return ((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ==
+		CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK);
+}
+
+static inline uint8_t
+enic_cq_rx_desc_tcp_udp_csum_ok(struct cq_enet_rq_desc *cqrd)
+{
+	return((cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ==
+		CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK);
+}
+
+static inline uint8_t
+enic_cq_rx_desc_rss_type(struct cq_enet_rq_desc *cqrd)
+{
+	return (uint8_t)((le16_to_cpu(cqrd->q_number_rss_type_flags) >>
+		CQ_DESC_Q_NUM_BITS) & CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
+}
+
+static inline uint32_t
+enic_cq_rx_desc_rss_hash(struct cq_enet_rq_desc *cqrd)
+{
+	return le32_to_cpu(cqrd->rss_hash);
+}
+
+static inline uint16_t
+enic_cq_rx_desc_vlan(struct cq_enet_rq_desc *cqrd)
+{
+	return le16_to_cpu(cqrd->vlan);
+}
+
+static inline uint16_t
+enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
+{
+	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
+	return le16_to_cpu(cqrd->bytes_written_flags) &
+		CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
+}
+
+static inline uint8_t
+enic_cq_rx_to_pkt_err_flags(struct cq_desc *cqd, uint64_t *pkt_err_flags_out)
+{
+	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
+	uint16_t bwflags;
+	int ret = 0;
+	uint64_t pkt_err_flags = 0;
+
+	bwflags = enic_cq_rx_desc_bwflags(cqrd);
+	if (unlikely(enic_cq_rx_desc_packet_error(bwflags))) {
+		pkt_err_flags = PKT_RX_MAC_ERR;
+		ret = 1;
+	}
+	*pkt_err_flags_out = pkt_err_flags;
+	return ret;
+}
+
+/*
+ * Lookup table to translate RX CQ flags to mbuf flags.
+ */
+static inline uint32_t
+enic_cq_rx_flags_to_pkt_type(struct cq_desc *cqd)
+{
+	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
+	uint8_t cqrd_flags = cqrd->flags;
+	static const uint32_t cq_type_table[128] __rte_cache_aligned = {
+		[32] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4,
+		[34] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
+			| RTE_PTYPE_L4_UDP,
+		[36] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
+			| RTE_PTYPE_L4_TCP,
+		[96] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4
+			| RTE_PTYPE_L4_FRAG,
+		[16] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6,
+		[18] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
+			| RTE_PTYPE_L4_UDP,
+		[20] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
+			| RTE_PTYPE_L4_TCP,
+		[80] =  RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6
+			| RTE_PTYPE_L4_FRAG,
+		/* All others reserved */
+	};
+	cqrd_flags &= CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT
+		| CQ_ENET_RQ_DESC_FLAGS_IPV4 | CQ_ENET_RQ_DESC_FLAGS_IPV6
+		| CQ_ENET_RQ_DESC_FLAGS_TCP | CQ_ENET_RQ_DESC_FLAGS_UDP;
+	return cq_type_table[cqrd_flags];
+}
+
+static inline void
+enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf)
+{
+	struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
+	uint16_t ciflags, bwflags, pkt_flags = 0;
+	ciflags = enic_cq_rx_desc_ciflags(cqrd);
+	bwflags = enic_cq_rx_desc_bwflags(cqrd);
+
+	mbuf->ol_flags = 0;
+
+	/* flags are meaningless if !EOP */
+	if (unlikely(!enic_cq_rx_desc_eop(ciflags)))
+		goto mbuf_flags_done;
+
+	/* VLAN stripping */
+	if (bwflags & CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) {
+		pkt_flags |= PKT_RX_VLAN_PKT;
+		mbuf->vlan_tci = enic_cq_rx_desc_vlan(cqrd);
+	} else {
+		mbuf->vlan_tci = 0;
+	}
+
+	/* RSS flag */
+	if (enic_cq_rx_desc_rss_type(cqrd)) {
+		pkt_flags |= PKT_RX_RSS_HASH;
+		mbuf->hash.rss = enic_cq_rx_desc_rss_hash(cqrd);
+	}
+
+	/* checksum flags */
+	if (!enic_cq_rx_desc_csum_not_calc(cqrd) &&
+		(mbuf->packet_type & RTE_PTYPE_L3_IPV4)) {
+		if (unlikely(!enic_cq_rx_desc_ipv4_csum_ok(cqrd)))
+			pkt_flags |= PKT_RX_IP_CKSUM_BAD;
+		if (mbuf->packet_type & (RTE_PTYPE_L4_UDP | RTE_PTYPE_L4_TCP)) {
+			if (unlikely(!enic_cq_rx_desc_tcp_udp_csum_ok(cqrd)))
+				pkt_flags |= PKT_RX_L4_CKSUM_BAD;
+		}
+	}
+
+ mbuf_flags_done:
+	mbuf->ol_flags = pkt_flags;
+}
+
+uint16_t
+enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+	       uint16_t nb_pkts)
+{
+	struct vnic_rq *rq = rx_queue;
+	struct enic *enic = vnic_dev_priv(rq->vdev);
+	unsigned int rx_id;
+	struct rte_mbuf *nmb, *rxmb;
+	uint16_t nb_rx = 0;
+	uint16_t nb_hold;
+	struct vnic_cq *cq;
+	volatile struct cq_desc *cqd_ptr;
+	uint8_t color;
+
+	cq = &enic->cq[enic_cq_rq(enic, rq->index)];
+	rx_id = cq->to_clean;		/* index of cqd, rqd, mbuf_table */
+	cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
+
+	nb_hold = rq->rx_nb_hold;	/* mbufs held by software */
+
+	while (nb_rx < nb_pkts) {
+		volatile struct rq_enet_desc *rqd_ptr;
+		dma_addr_t dma_addr;
+		struct cq_desc cqd;
+		uint64_t ol_err_flags;
+		uint8_t packet_error;
+
+		/* Check for pkts available */
+		color = (cqd_ptr->type_color >> CQ_DESC_COLOR_SHIFT)
+			& CQ_DESC_COLOR_MASK;
+		if (color == cq->last_color)
+			break;
+
+		/* Get the cq descriptor and rq pointer */
+		cqd = *cqd_ptr;
+		rqd_ptr = (struct rq_enet_desc *)(rq->ring.descs) + rx_id;
+
+		/* allocate a new mbuf */
+		nmb = rte_rxmbuf_alloc(rq->mp);
+		if (nmb == NULL) {
+			dev_err(enic, "RX mbuf alloc failed port=%u qid=%u",
+			enic->port_id, (unsigned)rq->index);
+			rte_eth_devices[enic->port_id].
+					data->rx_mbuf_alloc_failed++;
+			break;
+		}
+
+		/* A packet error means descriptor and data are untrusted */
+		packet_error = enic_cq_rx_to_pkt_err_flags(&cqd, &ol_err_flags);
+
+		/* Get the mbuf to return and replace with one just allocated */
+		rxmb = rq->mbuf_ring[rx_id];
+		rq->mbuf_ring[rx_id] = nmb;
+
+		/* Increment cqd, rqd, mbuf_table index */
+		rx_id++;
+		if (unlikely(rx_id == rq->ring.desc_count)) {
+			rx_id = 0;
+			cq->last_color = cq->last_color ? 0 : 1;
+		}
+
+		/* Prefetch next mbuf & desc while processing current one */
+		cqd_ptr = (struct cq_desc *)(cq->ring.descs) + rx_id;
+		rte_enic_prefetch(cqd_ptr);
+		rte_enic_prefetch(rq->mbuf_ring[rx_id]);
+		rte_enic_prefetch((struct rq_enet_desc *)(rq->ring.descs)
+				 + rx_id);
+
+		/* Push descriptor for newly allocated mbuf */
+		dma_addr = (dma_addr_t)(nmb->buf_physaddr
+			   + RTE_PKTMBUF_HEADROOM);
+		rqd_ptr->address = rte_cpu_to_le_64(dma_addr);
+		rqd_ptr->length_type = cpu_to_le16(nmb->buf_len
+				       - RTE_PKTMBUF_HEADROOM);
+
+		/* Fill in the rest of the mbuf */
+		rxmb->data_off = RTE_PKTMBUF_HEADROOM;
+		rxmb->nb_segs = 1;
+		rxmb->next = NULL;
+		rxmb->port = enic->port_id;
+		if (!packet_error) {
+			rxmb->pkt_len = enic_cq_rx_desc_n_bytes(&cqd);
+			rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
+			enic_cq_rx_to_pkt_flags(&cqd, rxmb);
+		} else {
+			rxmb->pkt_len = 0;
+			rxmb->packet_type = 0;
+			rxmb->ol_flags = 0;
+		}
+		rxmb->data_len = rxmb->pkt_len;
+
+		/* prefetch mbuf data for caller */
+		rte_packet_prefetch(RTE_PTR_ADD(rxmb->buf_addr,
+				    RTE_PKTMBUF_HEADROOM));
+
+		/* store the mbuf address into the next entry of the array */
+		rx_pkts[nb_rx++] = rxmb;
+	}
+
+	nb_hold += nb_rx;
+	cq->to_clean = rx_id;
+
+	if (nb_hold > rq->rx_free_thresh) {
+		rq->posted_index = enic_ring_add(rq->ring.desc_count,
+				rq->posted_index, nb_hold);
+		nb_hold = 0;
+		rte_mb();
+		iowrite32(rq->posted_index, &rq->ctrl->posted_index);
+	}
+
+	rq->rx_nb_hold = nb_hold;
+
+	return nb_rx;
+}
+
+static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
+{
+	struct vnic_wq_buf *buf;
+	struct rte_mbuf *m, *free[ENIC_MAX_WQ_DESCS];
+	unsigned int nb_to_free, nb_free = 0, i;
+	struct rte_mempool *pool;
+	unsigned int tail_idx;
+	unsigned int desc_count = wq->ring.desc_count;
+
+	nb_to_free = enic_ring_sub(desc_count, wq->tail_idx, completed_index)
+				   + 1;
+	tail_idx = wq->tail_idx;
+	buf = &wq->bufs[tail_idx];
+	pool = ((struct rte_mbuf *)buf->mb)->pool;
+	for (i = 0; i < nb_to_free; i++) {
+		buf = &wq->bufs[tail_idx];
+		m = (struct rte_mbuf *)(buf->mb);
+		if (likely(m->pool == pool)) {
+			ASSERT(nb_free < ENIC_MAX_WQ_DESCS);
+			free[nb_free++] = m;
+		} else {
+			rte_mempool_put_bulk(pool, (void *)free, nb_free);
+			free[0] = m;
+			nb_free = 1;
+			pool = m->pool;
+		}
+		tail_idx = enic_ring_incr(desc_count, tail_idx);
+		buf->mb = NULL;
+	}
+
+	rte_mempool_put_bulk(pool, (void **)free, nb_free);
+
+	wq->tail_idx = tail_idx;
+	wq->ring.desc_avail += nb_to_free;
+}
+
+unsigned int enic_cleanup_wq(__rte_unused struct enic *enic, struct vnic_wq *wq)
+{
+	u16 completed_index;
+
+	completed_index = *((uint32_t *)wq->cqmsg_rz->addr) & 0xffff;
+
+	if (wq->last_completed_index != completed_index) {
+		enic_free_wq_bufs(wq, completed_index);
+		wq->last_completed_index = completed_index;
+	}
+	return 0;
+}
+
+uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+	uint16_t nb_pkts)
+{
+	uint16_t index;
+	unsigned int pkt_len, data_len;
+	unsigned int nb_segs;
+	struct rte_mbuf *tx_pkt;
+	struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
+	struct enic *enic = vnic_dev_priv(wq->vdev);
+	unsigned short vlan_id;
+	unsigned short ol_flags;
+	unsigned int wq_desc_avail;
+	int head_idx;
+	struct vnic_wq_buf *buf;
+	unsigned int hw_ip_cksum_enabled;
+	unsigned int desc_count;
+	struct wq_enet_desc *descs, *desc_p, desc_tmp;
+	uint16_t mss;
+	uint8_t vlan_tag_insert;
+	uint8_t eop;
+	uint64_t bus_addr;
+
+	enic_cleanup_wq(enic, wq);
+	wq_desc_avail = vnic_wq_desc_avail(wq);
+	head_idx = wq->head_idx;
+	desc_count = wq->ring.desc_count;
+
+	nb_pkts = RTE_MIN(nb_pkts, ENIC_TX_XMIT_MAX);
+
+	hw_ip_cksum_enabled = enic->hw_ip_checksum;
+	for (index = 0; index < nb_pkts; index++) {
+		tx_pkt = *tx_pkts++;
+		nb_segs = tx_pkt->nb_segs;
+		if (nb_segs > wq_desc_avail) {
+			if (index > 0)
+				goto post;
+			goto done;
+		}
+
+		pkt_len = tx_pkt->pkt_len;
+		data_len = tx_pkt->data_len;
+		vlan_id = tx_pkt->vlan_tci;
+		ol_flags = tx_pkt->ol_flags;
+
+		mss = 0;
+		vlan_tag_insert = 0;
+		bus_addr = (dma_addr_t)
+			   (tx_pkt->buf_physaddr + tx_pkt->data_off);
+
+		descs = (struct wq_enet_desc *)wq->ring.descs;
+		desc_p = descs + head_idx;
+
+		eop = (data_len == pkt_len);
+
+		if (ol_flags & PKT_TX_VLAN_PKT)
+			vlan_tag_insert = 1;
+
+		if (hw_ip_cksum_enabled && (ol_flags & PKT_TX_IP_CKSUM))
+			mss |= ENIC_CALC_IP_CKSUM;
+
+		if (hw_ip_cksum_enabled && (ol_flags & PKT_TX_TCP_UDP_CKSUM))
+			mss |= ENIC_CALC_TCP_UDP_CKSUM;
+
+		wq_enet_desc_enc(&desc_tmp, bus_addr, data_len, mss, 0, 0, eop,
+				 eop, 0, vlan_tag_insert, vlan_id, 0);
+
+		*desc_p = desc_tmp;
+		buf = &wq->bufs[head_idx];
+		buf->mb = (void *)tx_pkt;
+		head_idx = enic_ring_incr(desc_count, head_idx);
+		wq_desc_avail--;
+
+		if (!eop) {
+			for (tx_pkt = tx_pkt->next; tx_pkt; tx_pkt =
+			    tx_pkt->next) {
+				data_len = tx_pkt->data_len;
+
+				if (tx_pkt->next == NULL)
+					eop = 1;
+				desc_p = descs + head_idx;
+				bus_addr = (dma_addr_t)(tx_pkt->buf_physaddr
+					   + tx_pkt->data_off);
+				wq_enet_desc_enc((struct wq_enet_desc *)
+						 &desc_tmp, bus_addr, data_len,
+						 mss, 0, 0, eop, eop, 0,
+						 vlan_tag_insert, vlan_id, 0);
+
+				*desc_p = desc_tmp;
+				buf = &wq->bufs[head_idx];
+				buf->mb = (void *)tx_pkt;
+				head_idx = enic_ring_incr(desc_count, head_idx);
+				wq_desc_avail--;
+			}
+		}
+	}
+ post:
+	rte_wmb();
+	iowrite32(head_idx, &wq->ctrl->posted_index);
+ done:
+	wq->ring.desc_avail = wq_desc_avail;
+	wq->head_idx = head_idx;
+
+	return index;
+}
-- 
2.7.0