diff mbox

[dpdk-dev,v2,16/19] xenvirt: move xenvirt PMD to drivers/net

Message ID 1431705423-16134-17-git-send-email-bruce.richardson@intel.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Bruce Richardson May 15, 2015, 3:57 p.m. UTC
Move xenvirt PMD to drivers/net directory

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/Makefile                               |   2 +-
 drivers/net/xenvirt/Makefile                       |  62 ++
 drivers/net/xenvirt/rte_eth_xenvirt.c              | 714 +++++++++++++++++++++
 drivers/net/xenvirt/rte_eth_xenvirt.h              |  62 ++
 drivers/net/xenvirt/rte_eth_xenvirt_version.map    |   7 +
 drivers/net/xenvirt/rte_mempool_gntalloc.c         | 298 +++++++++
 drivers/net/xenvirt/rte_xen_lib.c                  | 428 ++++++++++++
 drivers/net/xenvirt/rte_xen_lib.h                  | 113 ++++
 drivers/net/xenvirt/virtio_logs.h                  |  70 ++
 drivers/net/xenvirt/virtqueue.h                    | 280 ++++++++
 lib/Makefile                                       |   1 -
 lib/librte_eal/linuxapp/eal/Makefile               |   2 +-
 lib/librte_pmd_xenvirt/Makefile                    |  62 --
 lib/librte_pmd_xenvirt/rte_eth_xenvirt.c           | 714 ---------------------
 lib/librte_pmd_xenvirt/rte_eth_xenvirt.h           |  62 --
 lib/librte_pmd_xenvirt/rte_eth_xenvirt_version.map |   7 -
 lib/librte_pmd_xenvirt/rte_mempool_gntalloc.c      | 298 ---------
 lib/librte_pmd_xenvirt/rte_xen_lib.c               | 428 ------------
 lib/librte_pmd_xenvirt/rte_xen_lib.h               | 113 ----
 lib/librte_pmd_xenvirt/virtio_logs.h               |  70 --
 lib/librte_pmd_xenvirt/virtqueue.h                 | 280 --------
 21 files changed, 2036 insertions(+), 2037 deletions(-)
 create mode 100644 drivers/net/xenvirt/Makefile
 create mode 100644 drivers/net/xenvirt/rte_eth_xenvirt.c
 create mode 100644 drivers/net/xenvirt/rte_eth_xenvirt.h
 create mode 100644 drivers/net/xenvirt/rte_eth_xenvirt_version.map
 create mode 100644 drivers/net/xenvirt/rte_mempool_gntalloc.c
 create mode 100644 drivers/net/xenvirt/rte_xen_lib.c
 create mode 100644 drivers/net/xenvirt/rte_xen_lib.h
 create mode 100644 drivers/net/xenvirt/virtio_logs.h
 create mode 100644 drivers/net/xenvirt/virtqueue.h
 delete mode 100644 lib/librte_pmd_xenvirt/Makefile
 delete mode 100644 lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
 delete mode 100644 lib/librte_pmd_xenvirt/rte_eth_xenvirt.h
 delete mode 100644 lib/librte_pmd_xenvirt/rte_eth_xenvirt_version.map
 delete mode 100644 lib/librte_pmd_xenvirt/rte_mempool_gntalloc.c
 delete mode 100644 lib/librte_pmd_xenvirt/rte_xen_lib.c
 delete mode 100644 lib/librte_pmd_xenvirt/rte_xen_lib.h
 delete mode 100644 lib/librte_pmd_xenvirt/virtio_logs.h
 delete mode 100644 lib/librte_pmd_xenvirt/virtqueue.h
diff mbox

Patch

diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 1940393..1e6648a 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -44,7 +44,7 @@  DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += pcap
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += ring
 DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio
 DIRS-$(CONFIG_RTE_LIBRTE_VMXNET3_PMD) += vmxnet3
-#DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += librte_pmd_xenvirt
+DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += xenvirt
 
 include $(RTE_SDK)/mk/rte.sharelib.mk
 include $(RTE_SDK)/mk/rte.subdir.mk
diff --git a/drivers/net/xenvirt/Makefile b/drivers/net/xenvirt/Makefile
new file mode 100644
index 0000000..f0c796c
--- /dev/null
+++ b/drivers/net/xenvirt/Makefile
@@ -0,0 +1,62 @@ 
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * 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.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   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
+#   OWNER 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_SDK)/mk/rte.vars.mk
+
+#
+# library name
+#
+LIB = librte_pmd_xenvirt.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+EXPORT_MAP := rte_eth_xenvirt_version.map
+
+LIBABIVER := 1
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += rte_eth_xenvirt.c rte_mempool_gntalloc.c rte_xen_lib.c
+
+#
+# Export include files
+#
+SYMLINK-y-include += rte_eth_xenvirt.h
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_eal lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_mempool lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_net lib/librte_malloc
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_cmdline
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/drivers/net/xenvirt/rte_eth_xenvirt.c b/drivers/net/xenvirt/rte_eth_xenvirt.c
new file mode 100644
index 0000000..73e8bce
--- /dev/null
+++ b/drivers/net/xenvirt/rte_eth_xenvirt.c
@@ -0,0 +1,714 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/user.h>
+#include <linux/binfmts.h>
+#include <xen/xen-compat.h>
+#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
+#include <xs.h>
+#else
+#include <xenstore.h>
+#endif
+#include <linux/virtio_ring.h>
+
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_string_fns.h>
+#include <rte_dev.h>
+#include <cmdline_parse.h>
+#include <cmdline_parse_etheraddr.h>
+
+#include "rte_xen_lib.h"
+#include "virtqueue.h"
+#include "rte_eth_xenvirt.h"
+
+#define VQ_DESC_NUM 256
+#define VIRTIO_MBUF_BURST_SZ 64
+
+/* virtio_idx is increased after new device is created.*/
+static int virtio_idx = 0;
+
+static const char *drivername = "xen dummy virtio PMD";
+
+static struct rte_eth_link pmd_link = {
+		.link_speed = 10000,
+		.link_duplex = ETH_LINK_FULL_DUPLEX,
+		.link_status = 0
+};
+
+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 uint16_t
+eth_xenvirt_rx(void *q, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+	struct virtqueue *rxvq = q;
+	struct rte_mbuf *rxm, *new_mbuf;
+	uint16_t nb_used, num;
+	uint32_t len[VIRTIO_MBUF_BURST_SZ];
+	uint32_t i;
+	struct pmd_internals *pi = rxvq->internals;
+
+	nb_used = VIRTQUEUE_NUSED(rxvq);
+
+	rte_compiler_barrier(); /* rmb */
+	num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
+	num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ) ? num : VIRTIO_MBUF_BURST_SZ);
+	if (unlikely(num == 0)) return 0;
+
+	num = virtqueue_dequeue_burst(rxvq, rx_pkts, len, num);
+	PMD_RX_LOG(DEBUG, "used:%d dequeue:%d\n", nb_used, num);
+	for (i = 0; i < num ; i ++) {
+		rxm = rx_pkts[i];
+		PMD_RX_LOG(DEBUG, "packet len:%d\n", len[i]);
+		rxm->next = NULL;
+		rxm->data_off = RTE_PKTMBUF_HEADROOM;
+		rxm->data_len = (uint16_t)(len[i] - sizeof(struct virtio_net_hdr));
+		rxm->nb_segs = 1;
+		rxm->port = pi->port_id;
+		rxm->pkt_len  = (uint32_t)(len[i] - sizeof(struct virtio_net_hdr));
+	}
+	/* allocate new mbuf for the used descriptor */
+	while (likely(!virtqueue_full(rxvq))) {
+		new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
+		if (unlikely(new_mbuf == NULL)) {
+			break;
+		}
+		if (unlikely(virtqueue_enqueue_recv_refill(rxvq, new_mbuf))) {
+			rte_pktmbuf_free_seg(new_mbuf);
+			break;
+		}
+	}
+	pi->eth_stats.ipackets += num;
+	return num;
+}
+
+static uint16_t
+eth_xenvirt_tx(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+	struct virtqueue *txvq = tx_queue;
+	struct rte_mbuf *txm;
+	uint16_t nb_used, nb_tx, num, i;
+	int error;
+	uint32_t len[VIRTIO_MBUF_BURST_SZ];
+	struct rte_mbuf *snd_pkts[VIRTIO_MBUF_BURST_SZ];
+	struct pmd_internals *pi = txvq->internals;
+
+	nb_tx = 0;
+
+	if (unlikely(nb_pkts == 0))
+		return 0;
+
+	PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
+	nb_used = VIRTQUEUE_NUSED(txvq);
+
+	rte_compiler_barrier();   /* rmb */
+
+	num = (uint16_t)(likely(nb_used <= VIRTIO_MBUF_BURST_SZ) ? nb_used : VIRTIO_MBUF_BURST_SZ);
+	num = virtqueue_dequeue_burst(txvq, snd_pkts, len, num);
+
+	for (i = 0; i < num ; i ++) {
+		/* mergable not supported, one segment only */
+		rte_pktmbuf_free_seg(snd_pkts[i]);
+	}
+
+	while (nb_tx < nb_pkts) {
+		if (likely(!virtqueue_full(txvq))) {
+		/* TODO drop tx_pkts if it contains multiple segments */
+			txm = tx_pkts[nb_tx];
+			error = virtqueue_enqueue_xmit(txvq, txm);
+			if (unlikely(error)) {
+				if (error == ENOSPC)
+					PMD_TX_LOG(ERR, "virtqueue_enqueue Free count = 0\n");
+				else if (error == EMSGSIZE)
+					PMD_TX_LOG(ERR, "virtqueue_enqueue Free count < 1\n");
+				else
+					PMD_TX_LOG(ERR, "virtqueue_enqueue error: %d\n", error);
+				break;
+			}
+			nb_tx++;
+		} else {
+			PMD_TX_LOG(ERR, "No free tx descriptors to transmit\n");
+			/* virtqueue_notify not needed in our para-virt solution */
+			break;
+		}
+	}
+	pi->eth_stats.opackets += nb_tx;
+	return nb_tx;
+}
+
+static int
+eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
+{
+	RTE_LOG(ERR, PMD, "%s\n", __func__);
+	return 0;
+}
+
+/*
+ * Create a shared page between guest and host.
+ * Host monitors this page if it is cleared on unmap, and then
+ * do necessary clean up.
+ */
+static void
+gntalloc_vring_flag(int vtidx)
+{
+	char key_str[PATH_MAX];
+	char val_str[PATH_MAX];
+	uint32_t gref_tmp;
+	void *ptr;
+
+	if (grefwatch_from_alloc(&gref_tmp, &ptr)) {
+		RTE_LOG(ERR, PMD, "grefwatch_from_alloc error\n");
+		exit(0);
+	}
+
+	*(uint8_t *)ptr = MAP_FLAG;
+	snprintf(val_str, sizeof(val_str), "%u", gref_tmp);
+	snprintf(key_str, sizeof(key_str),
+		DPDK_XENSTORE_PATH"%d"VRING_FLAG_STR, vtidx);
+	xenstore_write(key_str, val_str);
+}
+
+/*
+ * Notify host this virtio device is started.
+ * Host could start polling this device.
+ */
+static void
+dev_start_notify(int vtidx)
+{
+	char key_str[PATH_MAX];
+	char val_str[PATH_MAX];
+
+	RTE_LOG(INFO, PMD, "%s: virtio %d is started\n", __func__, vtidx);
+	gntalloc_vring_flag(vtidx);
+
+	snprintf(key_str, sizeof(key_str), "%s%s%d",
+		DPDK_XENSTORE_PATH, EVENT_TYPE_START_STR,
+			vtidx);
+	snprintf(val_str, sizeof(val_str), "1");
+	xenstore_write(key_str, val_str);
+}
+
+/*
+ * Notify host this virtio device is stopped.
+ * Host could stop polling this device.
+ */
+static void
+dev_stop_notify(int vtidx)
+{
+	RTE_SET_USED(vtidx);
+}
+
+
+static int
+update_mac_address(struct ether_addr *mac_addrs, int vtidx)
+{
+	char key_str[PATH_MAX];
+	char val_str[PATH_MAX];
+	int rv;
+
+	if (mac_addrs == NULL) {
+		RTE_LOG(ERR, PMD, "%s: NULL pointer mac specified\n", __func__);
+		return -1;
+	}
+	rv = snprintf(key_str, sizeof(key_str),
+			DPDK_XENSTORE_PATH"%d_ether_addr", vtidx);
+	if (rv == -1)
+		return rv;
+	rv = snprintf(val_str, sizeof(val_str), "%02x:%02x:%02x:%02x:%02x:%02x",
+			mac_addrs->addr_bytes[0],
+			mac_addrs->addr_bytes[1],
+			mac_addrs->addr_bytes[2],
+			mac_addrs->addr_bytes[3],
+			mac_addrs->addr_bytes[4],
+			mac_addrs->addr_bytes[5]);
+	if (rv == -1)
+		return rv;
+	if (xenstore_write(key_str, val_str))
+		return rv;
+	return 0;
+}
+
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+	struct virtqueue *rxvq = dev->data->rx_queues[0];
+	struct virtqueue *txvq = dev->data->tx_queues[0];
+	struct rte_mbuf *m;
+	struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
+	int rv;
+
+	dev->data->dev_link.link_status = 1;
+	while (!virtqueue_full(rxvq)) {
+		m = rte_rxmbuf_alloc(rxvq->mpool);
+		if (m == NULL)
+			break;
+		/* Enqueue allocated buffers. */
+		if (virtqueue_enqueue_recv_refill(rxvq, m)) {
+			rte_pktmbuf_free_seg(m);
+			break;
+		}
+	}
+
+	rxvq->internals = pi;
+	txvq->internals = pi;
+
+	rv = update_mac_address(dev->data->mac_addrs, pi->virtio_idx);
+	if (rv)
+		return -1;
+	dev_start_notify(pi->virtio_idx);
+
+	return 0;
+}
+
+static void
+eth_dev_stop(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
+
+	dev->data->dev_link.link_status = 0;
+	dev_stop_notify(pi->virtio_idx);
+}
+
+/*
+ * Notify host this virtio device is closed.
+ * Host could do necessary clean up to this device.
+ */
+static void
+eth_dev_close(struct rte_eth_dev *dev)
+{
+	RTE_SET_USED(dev);
+}
+
+static void
+eth_dev_info(struct rte_eth_dev *dev,
+		struct rte_eth_dev_info *dev_info)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	RTE_SET_USED(internals);
+	dev_info->driver_name = drivername;
+	dev_info->max_mac_addrs = 1;
+	dev_info->max_rx_pktlen = (uint32_t)2048;
+	dev_info->max_rx_queues = (uint16_t)1;
+	dev_info->max_tx_queues = (uint16_t)1;
+	dev_info->min_rx_bufsize = 0;
+	dev_info->pci_dev = NULL;
+}
+
+static void
+eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	if(stats)
+		rte_memcpy(stats, &internals->eth_stats, sizeof(*stats));
+}
+
+static void
+eth_stats_reset(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	/* Reset software totals */
+	memset(&internals->eth_stats, 0, sizeof(internals->eth_stats));
+}
+
+static void
+eth_queue_release(void *q __rte_unused)
+{
+}
+
+static int
+eth_link_update(struct rte_eth_dev *dev __rte_unused,
+		int wait_to_complete __rte_unused)
+{
+	return 0;
+}
+
+/*
+ * Create shared vring between guest and host.
+ * Memory is allocated through grant alloc driver, so it is not physical continuous.
+ */
+static void *
+gntalloc_vring_create(int queue_type, uint32_t size, int vtidx)
+{
+	char key_str[PATH_MAX] = {0};
+	char val_str[PATH_MAX] = {0};
+	void *va = NULL;
+	int pg_size;
+	uint32_t pg_num;
+	uint32_t *gref_arr = NULL;
+	phys_addr_t *pa_arr = NULL;
+	uint64_t start_index;
+	int rv;
+
+	pg_size = getpagesize();
+	size    = RTE_ALIGN_CEIL(size, pg_size);
+	pg_num  = size / pg_size;
+
+	gref_arr = calloc(pg_num, sizeof(gref_arr[0]));
+	pa_arr  = calloc(pg_num, sizeof(pa_arr[0]));
+
+	if (gref_arr == NULL || pa_arr == NULL) {
+		RTE_LOG(ERR, PMD, "%s: calloc failed\n", __func__);
+		goto out;
+	}
+
+	va  = gntalloc(size, gref_arr, &start_index);
+	if (va == NULL) {
+		RTE_LOG(ERR, PMD, "%s: gntalloc failed\n", __func__);
+		goto out;
+	}
+
+	if (get_phys_map(va, pa_arr, pg_num, pg_size))
+		goto out;
+
+	/* write in xenstore gref and pfn for each page of vring */
+	if (grant_node_create(pg_num, gref_arr, pa_arr, val_str, sizeof(val_str))) {
+		gntfree(va, size, start_index);
+		va = NULL;
+		goto out;
+	}
+
+	if (queue_type == VTNET_RQ)
+		rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"RXVRING_XENSTORE_STR, vtidx);
+	else
+		rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"TXVRING_XENSTORE_STR, vtidx);
+	if (rv == -1 || xenstore_write(key_str, val_str) == -1) {
+		gntfree(va, size, start_index);
+		va = NULL;
+	}
+out:
+	if (pa_arr)
+		free(pa_arr);
+	if (gref_arr)
+		free(gref_arr);
+
+	return va;
+}
+
+
+
+static struct virtqueue *
+virtio_queue_setup(struct rte_eth_dev *dev, int queue_type)
+{
+	struct virtqueue *vq = NULL;
+	uint16_t vq_size = VQ_DESC_NUM;
+	int i = 0;
+	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
+	size_t size;
+	struct vring *vr;
+
+	/* Allocate memory for virtqueue. */
+	if (queue_type == VTNET_RQ) {
+		snprintf(vq_name, sizeof(vq_name), "port%d_rvq",
+				dev->data->port_id);
+		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+		if (vq == NULL) {
+			RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
+			return NULL;
+		}
+		memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
+	} else if(queue_type == VTNET_TQ) {
+		snprintf(vq_name, sizeof(vq_name), "port%d_tvq",
+			dev->data->port_id);
+		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+		if (vq == NULL) {
+			RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
+			return NULL;
+		}
+		memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
+	}
+
+	memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
+
+	vq->vq_alignment = VIRTIO_PCI_VRING_ALIGN;
+	vq->vq_nentries = vq_size;
+	vq->vq_free_cnt = vq_size;
+	/* Calcuate vring size according to virtio spec */
+	size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
+	vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
+	/* Allocate memory for virtio vring through gntalloc driver*/
+	vq->vq_ring_virt_mem = gntalloc_vring_create(queue_type, vq->vq_ring_size,
+		((struct pmd_internals *)dev->data->dev_private)->virtio_idx);
+	memset(vq->vq_ring_virt_mem, 0, vq->vq_ring_size);
+	vr = &vq->vq_ring;
+	vring_init(vr, vq_size, vq->vq_ring_virt_mem, vq->vq_alignment);
+	/*
+	 * Locally maintained last consumed index, this idex trails
+	 * vq_ring.used->idx.
+	 */
+	vq->vq_used_cons_idx = 0;
+	vq->vq_desc_head_idx = 0;
+	vq->vq_free_cnt = vq->vq_nentries;
+	memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
+
+	/* Chain all the descriptors in the ring with an END */
+	for (i = 0; i < vq_size - 1; i++)
+		vr->desc[i].next = (uint16_t)(i + 1);
+	vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
+
+	return vq;
+}
+
+static int
+eth_rx_queue_setup(struct rte_eth_dev *dev,uint16_t rx_queue_id,
+				uint16_t nb_rx_desc __rte_unused,
+				unsigned int socket_id __rte_unused,
+				const struct rte_eth_rxconf *rx_conf __rte_unused,
+				struct rte_mempool *mb_pool)
+{
+	struct virtqueue *vq;
+	vq = dev->data->rx_queues[rx_queue_id] = virtio_queue_setup(dev, VTNET_RQ);
+	vq->mpool = mb_pool;
+	return 0;
+}
+
+static int
+eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+				uint16_t nb_tx_desc __rte_unused,
+				unsigned int socket_id __rte_unused,
+				const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+	dev->data->tx_queues[tx_queue_id] = virtio_queue_setup(dev, VTNET_TQ);
+	return 0;
+}
+
+
+
+static const struct eth_dev_ops ops = {
+	.dev_start = eth_dev_start,
+	.dev_stop = eth_dev_stop,
+	.dev_close = eth_dev_close,
+	.dev_configure = eth_dev_configure,
+	.dev_infos_get = eth_dev_info,
+	.rx_queue_setup = eth_rx_queue_setup,
+	.tx_queue_setup = eth_tx_queue_setup,
+	.rx_queue_release = eth_queue_release,
+	.tx_queue_release = eth_queue_release,
+	.link_update = eth_link_update,
+	.stats_get = eth_stats_get,
+	.stats_reset = eth_stats_reset,
+};
+
+
+static int
+rte_eth_xenvirt_parse_args(struct xenvirt_dict *dict,
+			const char *name, const char *params)
+{
+	int i;
+	char *pairs[RTE_ETH_XENVIRT_MAX_ARGS];
+	int num_of_pairs;
+	char *pair[2];
+	char *args;
+	int ret = -1;
+
+	if (params == NULL)
+		return 0;
+
+	args = rte_zmalloc(NULL, strlen(params) + 1, RTE_CACHE_LINE_SIZE);
+	if (args == NULL) {
+		RTE_LOG(ERR, PMD, "Couldn't parse %s device \n", name);
+		return -1;
+	}
+	rte_memcpy(args, params, strlen(params));
+
+	num_of_pairs = rte_strsplit(args, strnlen(args, MAX_ARG_STRLEN),
+					pairs,
+					RTE_ETH_XENVIRT_MAX_ARGS ,
+					RTE_ETH_XENVIRT_PAIRS_DELIM);
+
+	for (i = 0; i < num_of_pairs; i++) {
+		pair[0] = NULL;
+		pair[1] = NULL;
+		rte_strsplit(pairs[i], strnlen(pairs[i], MAX_ARG_STRLEN),
+					pair, 2,
+					RTE_ETH_XENVIRT_KEY_VALUE_DELIM);
+
+		if (pair[0] == NULL || pair[1] == NULL || pair[0][0] == 0
+			|| pair[1][0] == 0) {
+			RTE_LOG(ERR, PMD,
+				"Couldn't parse %s device,"
+				"wrong key or value \n", name);
+			goto err;
+		}
+
+		if (!strncmp(pair[0], RTE_ETH_XENVIRT_MAC_PARAM,
+				sizeof(RTE_ETH_XENVIRT_MAC_PARAM))) {
+			if (cmdline_parse_etheraddr(NULL,
+						    pair[1],
+						    &dict->addr,
+						    sizeof(dict->addr)) < 0) {
+				RTE_LOG(ERR, PMD,
+					"Invalid %s device ether address\n",
+					name);
+				goto err;
+			}
+
+			dict->addr_valid = 1;
+		}
+	}
+
+	ret = 0;
+err:
+	rte_free(args);
+	return ret;
+}
+
+enum dev_action {
+	DEV_CREATE,
+	DEV_ATTACH
+};
+
+
+static int
+eth_dev_xenvirt_create(const char *name, const char *params,
+		const unsigned numa_node,
+                enum dev_action action)
+{
+	struct rte_eth_dev_data *data = NULL;
+	struct rte_pci_device *pci_dev = NULL;
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+	struct xenvirt_dict dict;
+	bzero(&dict, sizeof(struct xenvirt_dict));
+
+	RTE_LOG(INFO, PMD, "Creating virtio rings backed ethdev on numa socket %u\n",
+			numa_node);
+	RTE_SET_USED(action);
+
+	if (rte_eth_xenvirt_parse_args(&dict, name, params) < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to parse ethdev parameters\n", __func__);
+		return -1;
+	}
+
+	/* now do all data allocation - for eth_dev structure, dummy pci driver
+	 * and internal (private) data
+	 */
+	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+	if (data == NULL)
+		goto err;
+
+	pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
+	if (pci_dev == NULL)
+		goto err;
+
+	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
+	if (internals == NULL)
+		goto err;
+
+	/* reserve an ethdev entry */
+	eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+	if (eth_dev == NULL)
+		goto err;
+
+	pci_dev->numa_node = numa_node;
+
+	data->dev_private = internals;
+	data->port_id = eth_dev->data->port_id;
+	data->nb_rx_queues = (uint16_t)1;
+	data->nb_tx_queues = (uint16_t)1;
+	data->dev_link = pmd_link;
+	data->mac_addrs = rte_zmalloc("xen_virtio", ETHER_ADDR_LEN, 0);
+
+	if(dict.addr_valid)
+		memcpy(&data->mac_addrs->addr_bytes, &dict.addr, sizeof(struct ether_addr));
+	else
+		eth_random_addr(&data->mac_addrs->addr_bytes[0]);
+
+	eth_dev->data = data;
+	eth_dev->dev_ops = &ops;
+	eth_dev->pci_dev = pci_dev;
+
+	eth_dev->rx_pkt_burst = eth_xenvirt_rx;
+	eth_dev->tx_pkt_burst = eth_xenvirt_tx;
+
+	internals->virtio_idx = virtio_idx++;
+	internals->port_id = eth_dev->data->port_id;
+
+	return 0;
+
+err:
+	rte_free(data);
+	rte_free(pci_dev);
+	rte_free(internals);
+
+	return -1;
+}
+
+
+/*TODO: Support multiple process model */
+static int
+rte_pmd_xenvirt_devinit(const char *name, const char *params)
+{
+	if (virtio_idx == 0) {
+		if (xenstore_init() != 0) {
+			RTE_LOG(ERR, PMD, "%s: xenstore init failed\n", __func__);
+			return -1;
+		}
+		if (gntalloc_open() != 0) {
+			RTE_LOG(ERR, PMD, "%s: grant init failed\n", __func__);
+			return -1;
+		}
+	}
+	eth_dev_xenvirt_create(name, params, rte_socket_id(), DEV_CREATE);
+	return 0;
+}
+
+static struct rte_driver pmd_xenvirt_drv = {
+	.name = "eth_xenvirt",
+	.type = PMD_VDEV,
+	.init = rte_pmd_xenvirt_devinit,
+};
+
+PMD_REGISTER_DRIVER(pmd_xenvirt_drv);
diff --git a/drivers/net/xenvirt/rte_eth_xenvirt.h b/drivers/net/xenvirt/rte_eth_xenvirt.h
new file mode 100644
index 0000000..fc15a63
--- /dev/null
+++ b/drivers/net/xenvirt/rte_eth_xenvirt.h
@@ -0,0 +1,62 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 _RTE_ETH_XENVIRT_H_
+#define _RTE_ETH_XENVIRT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_mempool.h>
+#include <rte_ring.h>
+
+/**
+ * Creates mempool for xen virtio PMD.
+ * This function uses memzone_reserve to allocate memory for meta data,
+ * and uses grant alloc driver to allocate memory for data area.
+ * The input parameters are exactly the same as rte_mempool_create.
+ */
+struct rte_mempool *
+rte_mempool_gntalloc_create(const char *name, unsigned elt_num, unsigned elt_size,
+		   unsigned cache_size, unsigned private_data_size,
+		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
+		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
+		   int socket_id, unsigned flags);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/drivers/net/xenvirt/rte_eth_xenvirt_version.map b/drivers/net/xenvirt/rte_eth_xenvirt_version.map
new file mode 100644
index 0000000..dd636f7
--- /dev/null
+++ b/drivers/net/xenvirt/rte_eth_xenvirt_version.map
@@ -0,0 +1,7 @@ 
+DPDK_2.0 {
+	global:
+
+	rte_mempool_gntalloc_create;
+
+	local: *;
+};
diff --git a/drivers/net/xenvirt/rte_mempool_gntalloc.c b/drivers/net/xenvirt/rte_mempool_gntalloc.c
new file mode 100644
index 0000000..3a650e8
--- /dev/null
+++ b/drivers/net/xenvirt/rte_mempool_gntalloc.c
@@ -0,0 +1,298 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include <xen/sys/gntalloc.h>
+
+#include <rte_common.h>
+#include <rte_mempool.h>
+#include <rte_memory.h>
+#include <rte_errno.h>
+
+#include "rte_xen_lib.h"
+#include "rte_eth_xenvirt.h"
+
+struct _gntarr {
+	uint32_t gref;
+	phys_addr_t pa;
+	uint64_t index;
+	void *va;
+};
+
+struct _mempool_gntalloc_info {
+	struct rte_mempool *mp;
+	uint32_t pg_num;
+	uint32_t *gref_arr;
+	phys_addr_t *pa_arr;
+	void *va;
+	uint32_t mempool_idx;
+	uint64_t start_index;
+};
+
+
+static rte_atomic32_t global_xenvirt_mempool_idx = RTE_ATOMIC32_INIT(-1);
+
+static int
+compare(const void *p1, const void *p2)
+{
+	return ((const struct _gntarr *)p1)->pa  - ((const struct _gntarr *)p2)->pa;
+}
+
+
+static struct _mempool_gntalloc_info
+_create_mempool(const char *name, unsigned elt_num, unsigned elt_size,
+		   unsigned cache_size, unsigned private_data_size,
+		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
+		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
+		   int socket_id, unsigned flags)
+{
+	struct _mempool_gntalloc_info mgi;
+	struct rte_mempool *mp = NULL;
+	struct rte_mempool_objsz  objsz;
+	uint32_t pg_num, rpg_num, pg_shift, pg_sz;
+	char *va, *orig_va, *uv; /* uv: from which, the pages could be freed */
+	ssize_t sz, usz; /* usz: unused size */
+	/*
+	 * for each page allocated through xen_gntalloc driver,
+	 * gref_arr:stores grant references,
+	 * pa_arr: stores physical address,
+	 * gnt_arr: stores all meta dat
+	 */
+	uint32_t *gref_arr = NULL;
+	phys_addr_t *pa_arr = NULL;
+	struct _gntarr *gnt_arr = NULL;
+	/* start index of the grant referances, used for dealloc*/
+	uint64_t start_index;
+	uint32_t i, j;
+	int rv = 0;
+	struct ioctl_gntalloc_dealloc_gref arg;
+
+	mgi.mp = NULL;
+	va = orig_va = uv = NULL;
+	pg_num = rpg_num = 0;
+	sz = 0;
+
+	pg_sz = getpagesize();
+	if (rte_is_power_of_2(pg_sz) == 0) {
+		goto out;
+	}
+	pg_shift = rte_bsf32(pg_sz);
+
+	rte_mempool_calc_obj_size(elt_size, flags, &objsz);
+	sz = rte_mempool_xmem_size(elt_num, objsz.total_size, pg_shift);
+	pg_num = sz >> pg_shift;
+
+	pa_arr = calloc(pg_num, sizeof(pa_arr[0]));
+	gref_arr = calloc(pg_num, sizeof(gref_arr[0]));
+	gnt_arr  = calloc(pg_num, sizeof(gnt_arr[0]));
+	if ((gnt_arr == NULL) || (gref_arr == NULL) || (pa_arr == NULL))
+		goto out;
+
+	/* grant index is continuous in ascending order */
+	orig_va = gntalloc(sz, gref_arr, &start_index);
+	if (orig_va == NULL)
+		goto out;
+
+	get_phys_map(orig_va, pa_arr, pg_num, pg_sz);
+	for (i = 0; i < pg_num; i++) {
+		gnt_arr[i].index = start_index + i * pg_sz;
+		gnt_arr[i].gref = gref_arr[i];
+		gnt_arr[i].pa = pa_arr[i];
+		gnt_arr[i].va  = RTE_PTR_ADD(orig_va, i * pg_sz);
+	}
+	qsort(gnt_arr, pg_num, sizeof(struct _gntarr), compare);
+
+	va = get_xen_virtual(sz, pg_sz);
+	if (va == NULL) {
+		goto out;
+	}
+
+	/*
+	 * map one by one, as index isn't continuous now.
+	 * pg_num VMAs, doesn't linux has a limitation on this?
+	 */
+	for (i = 0; i < pg_num; i++) {
+	/* update gref_arr and pa_arr after sort */
+		gref_arr[i] = gnt_arr[i].gref;
+		pa_arr[i]   = gnt_arr[i].pa;
+		gnt_arr[i].va = mmap(va + i * pg_sz, pg_sz, PROT_READ | PROT_WRITE,
+			MAP_SHARED | MAP_FIXED, gntalloc_fd, gnt_arr[i].index);
+		if ((gnt_arr[i].va == MAP_FAILED) || (gnt_arr[i].va != (va + i * pg_sz))) {
+			RTE_LOG(ERR, PMD, "failed to map %d pages\n", i);
+			goto mmap_failed;
+		}
+	}
+
+	/*
+	 * Check that allocated size is big enough to hold elt_num
+	 * objects and a calcualte how many bytes are actually required.
+	 */
+	usz = rte_mempool_xmem_usage(va, elt_num, objsz.total_size, pa_arr, pg_num, pg_shift);
+	if (usz < 0) {
+		mp = NULL;
+		i = pg_num;
+		goto mmap_failed;
+	} else {
+		/* unmap unused pages if any */
+		uv = RTE_PTR_ADD(va, usz);
+		if ((usz = va + sz - uv) > 0) {
+
+			RTE_LOG(ERR, PMD,
+				"%s(%s): unmap unused %zu of %zu "
+				"mmaped bytes @%p orig:%p\n",
+				__func__, name, usz, sz, uv, va);
+			munmap(uv, usz);
+			i = (sz - usz) / pg_sz;
+			for (; i < pg_num; i++) {
+				arg.count = 1;
+				arg.index = gnt_arr[i].index;
+				rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg);
+				if (rv) {
+					/* shouldn't fail here */
+					RTE_LOG(ERR, PMD, "va=%p pa=%p index=%p %s\n",
+						gnt_arr[i].va,
+						(void *)gnt_arr[i].pa,
+						(void *)arg.index, strerror(errno));
+					rte_panic("gntdealloc failed when freeing pages\n");
+				}
+			}
+
+			rpg_num = (sz - usz) >> pg_shift;
+		} else
+			rpg_num = pg_num;
+
+		mp = rte_mempool_xmem_create(name, elt_num, elt_size,
+				cache_size, private_data_size,
+				mp_init, mp_init_arg,
+				obj_init, obj_init_arg,
+				socket_id, flags, va, pa_arr, rpg_num, pg_shift);
+
+		RTE_VERIFY(elt_num == mp->size);
+	}
+	mgi.mp = mp;
+	mgi.pg_num = rpg_num;
+	mgi.gref_arr = gref_arr;
+	mgi.pa_arr = pa_arr;
+	if (mp)
+		mgi.mempool_idx = rte_atomic32_add_return(&global_xenvirt_mempool_idx, 1);
+	mgi.start_index = start_index;
+	mgi.va = va;
+
+	if (mp == NULL) {
+		i = pg_num;
+		goto mmap_failed;
+	}
+
+/*
+ * unmap only, without deallocate grant reference.
+ * unused pages have already been unmaped,
+ * unmap twice will fail, but it is safe.
+ */
+mmap_failed:
+	for (j = 0; j < i; j++) {
+		if (gnt_arr[i].va)
+			munmap(gnt_arr[i].va, pg_sz);
+	}
+out:
+	if (gnt_arr)
+		free(gnt_arr);
+	if (orig_va)
+		munmap(orig_va, sz);
+	if (mp == NULL) {
+		if (gref_arr)
+			free(gref_arr);
+		if (pa_arr)
+			free(pa_arr);
+
+		/* some gref has already been de-allocated from the list in the driver,
+		 * so dealloc one by one, and it is safe to deallocate twice
+		 */
+		if (orig_va) {
+			for (i = 0; i < pg_num; i++) {
+				arg.index = start_index + i * pg_sz;
+				rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg);
+			}
+		}
+	}
+	return mgi;
+}
+
+struct rte_mempool *
+rte_mempool_gntalloc_create(const char *name, unsigned elt_num, unsigned elt_size,
+		   unsigned cache_size, unsigned private_data_size,
+		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
+		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
+		   int socket_id, unsigned flags)
+{
+	int rv;
+	uint32_t i;
+	struct _mempool_gntalloc_info mgi;
+	struct ioctl_gntalloc_dealloc_gref arg;
+	int pg_sz = getpagesize();
+
+	mgi = _create_mempool(name, elt_num, elt_size,
+			cache_size, private_data_size,
+			mp_init, mp_init_arg,
+			obj_init, obj_init_arg,
+			socket_id, flags);
+	if (mgi.mp) {
+		rv = grant_gntalloc_mbuf_pool(mgi.mp,
+			mgi.pg_num,
+			mgi.gref_arr,
+			mgi.pa_arr,
+			mgi.mempool_idx);
+		free(mgi.gref_arr);
+		free(mgi.pa_arr);
+		if (rv == 0)
+			return mgi.mp;
+		/*
+		 * in _create_mempool, unused pages have already been unmapped, deallocagted
+		 * unmap and dealloc the remained ones here.
+		 */
+		munmap(mgi.va, pg_sz * mgi.pg_num);
+		for (i = 0; i < mgi.pg_num; i++) {
+			arg.index = mgi.start_index + i * pg_sz;
+			rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg);
+		}
+		return NULL;
+	}
+	return NULL;
+
+
+
+}
diff --git a/drivers/net/xenvirt/rte_xen_lib.c b/drivers/net/xenvirt/rte_xen_lib.c
new file mode 100644
index 0000000..b3932f0
--- /dev/null
+++ b/drivers/net/xenvirt/rte_xen_lib.c
@@ -0,0 +1,428 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <xen/xen-compat.h>
+#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
+#include <xs.h>
+#else
+#include <xenstore.h>
+#endif
+#include <xen/sys/gntalloc.h>
+
+#include <rte_common.h>
+#include <rte_string_fns.h>
+
+#include "rte_xen_lib.h"
+
+/*
+ * The grant node format in xenstore for vring/mpool is:
+ * 0_rx_vring_gref = "gref1#, gref2#, gref3#"
+ * 0_mempool_gref  = "gref1#, gref2#, gref3#"
+ * each gref# is a grant reference for a shared page.
+ * In each shared page, we store the grant_node_item items.
+ */
+struct grant_node_item {
+	uint32_t gref;
+	uint32_t pfn;
+} __attribute__((packed));
+
+/* fd for xen_gntalloc driver, used to allocate grant pages*/
+int gntalloc_fd = -1;
+
+/* xenstore path for local domain, now it is '/local/domain/domid/' */
+static char *dompath = NULL;
+/* handle to xenstore read/write operations */
+static struct xs_handle *xs = NULL;
+
+/*
+ * Reserve a virtual address space.
+ * On success, returns the pointer. On failure, returns NULL.
+ */
+void *
+get_xen_virtual(size_t size, size_t page_sz)
+{
+	void *addr;
+	uintptr_t aligned_addr;
+
+	addr = mmap(NULL, size + page_sz, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+	if (addr == MAP_FAILED) {
+		RTE_LOG(ERR, PMD, "failed get a virtual area\n");
+		return NULL;
+	}
+
+	aligned_addr = RTE_ALIGN_CEIL((uintptr_t)addr, page_sz);
+	addr = (void *)(aligned_addr);
+
+	return addr;
+}
+
+/*
+ * Get the physical address for virtual memory starting at va.
+ */
+int
+get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz)
+{
+	int32_t fd, rc = 0;
+	uint32_t i, nb;
+	off_t ofs;
+
+	ofs = (uintptr_t)va / pg_sz * sizeof(*pa);
+	nb = pg_num * sizeof(*pa);
+
+	if ((fd = open(PAGEMAP_FNAME, O_RDONLY)) < 0 ||
+			(rc = pread(fd, pa, nb, ofs)) < 0 ||
+			(rc -= nb) != 0) {
+		RTE_LOG(ERR, PMD, "%s: failed read of %u bytes from \'%s\' "
+			"at offset %zu, error code: %d\n",
+			__func__, nb, PAGEMAP_FNAME, ofs, errno);
+		rc = ENOENT;
+	}
+
+	close(fd);
+	for (i = 0; i != pg_num; i++)
+		pa[i] = (pa[i] & PAGEMAP_PFN_MASK) * pg_sz;
+
+	return rc;
+}
+
+int
+gntalloc_open(void)
+{
+	gntalloc_fd = open(XEN_GNTALLOC_FNAME, O_RDWR);
+	return (gntalloc_fd != -1) ? 0 : -1;
+}
+
+void
+gntalloc_close(void)
+{
+	if (gntalloc_fd != -1)
+		close(gntalloc_fd);
+	gntalloc_fd = -1;
+}
+
+void *
+gntalloc(size_t size, uint32_t *gref, uint64_t *start_index)
+{
+	int page_size = getpagesize();
+	uint32_t i, pg_num;
+	void *va;
+	int rv;
+	struct ioctl_gntalloc_alloc_gref *arg;
+	struct ioctl_gntalloc_dealloc_gref arg_d;
+
+	if (size % page_size) {
+		RTE_LOG(ERR, PMD, "%s: %zu isn't multiple of page size\n",
+			__func__, size);
+		return NULL;
+	}
+
+	pg_num = size / page_size;
+	arg = malloc(sizeof(*arg) + (pg_num - 1) * sizeof(uint32_t));
+	if (arg == NULL)
+		return NULL;
+	arg->domid = DOM0_DOMID;
+	arg->flags = GNTALLOC_FLAG_WRITABLE;
+	arg->count = pg_num;
+
+	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_ALLOC_GREF, arg);
+	if (rv) {
+		RTE_LOG(ERR, PMD, "%s: ioctl error\n", __func__);
+		free(arg);
+		return NULL;
+	}
+
+	va = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, gntalloc_fd, arg->index);
+	if (va == MAP_FAILED) {
+		RTE_LOG(ERR, PMD, "%s: mmap failed\n", __func__);
+		arg_d.count = pg_num;
+		arg_d.index = arg->index;
+		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg_d);
+		free(arg);
+		return NULL;
+	}
+
+	if (gref) {
+		for (i = 0; i < pg_num; i++) {
+			gref[i] = arg->gref_ids[i];
+		}
+	}
+	if (start_index)
+		*start_index = arg->index;
+
+	free(arg);
+
+	return va;
+}
+
+int
+grefwatch_from_alloc(uint32_t *gref, void **pptr)
+{
+	int rv;
+	void *ptr;
+	int pg_size = getpagesize();
+	struct ioctl_gntalloc_alloc_gref arg = {
+		.domid = DOM0_DOMID,
+		.flags = GNTALLOC_FLAG_WRITABLE,
+		.count = 1
+	};
+	struct ioctl_gntalloc_dealloc_gref arg_d;
+	struct ioctl_gntalloc_unmap_notify notify = {
+		.action = UNMAP_NOTIFY_CLEAR_BYTE
+	};
+
+	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_ALLOC_GREF, &arg);
+	if (rv) {
+		RTE_LOG(ERR, PMD, "%s: ioctl error\n", __func__);
+		return -1;
+	}
+
+	ptr = (void *)mmap(NULL, pg_size, PROT_READ|PROT_WRITE, MAP_SHARED, gntalloc_fd, arg.index);
+	arg_d.index = arg.index;
+	arg_d.count = 1;
+	if (ptr == MAP_FAILED) {
+		RTE_LOG(ERR, PMD, "%s: mmap failed\n", __func__);
+		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
+		return -1;
+	}
+	if (pptr)
+		*pptr = ptr;
+	if (gref)
+		*gref = arg.gref_ids[0];
+
+	notify.index = arg.index;
+	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_SET_UNMAP_NOTIFY, &notify);
+	if (rv) {
+		RTE_LOG(ERR, PMD, "%s: unmap notify failed\n", __func__);
+		munmap(ptr, pg_size);
+		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
+		return -1;
+	}
+
+	return 0;
+}
+
+void
+gntfree(void *va, size_t sz, uint64_t start_index)
+{
+	struct ioctl_gntalloc_dealloc_gref arg_d;
+
+	if (va && sz) {
+		munmap(va, sz);
+		arg_d.count = sz / getpagesize();
+		arg_d.index = start_index;
+		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
+	}
+}
+
+static int
+xenstore_cleanup(void)
+{
+	char store_path[PATH_MAX] = {0};
+
+	if (snprintf(store_path, sizeof(store_path),
+		"%s%s", dompath, DPDK_XENSTORE_NODE) == -1)
+		return -1;
+
+	if (xs_rm(xs, XBT_NULL, store_path) == false) {
+		RTE_LOG(ERR, PMD, "%s: failed cleanup node\n", __func__);
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+xenstore_init(void)
+{
+	unsigned int len, domid;
+	char *buf;
+	static int cleanup = 0;
+	char *end;
+
+	xs = xs_domain_open();
+	if (xs == NULL) {
+		RTE_LOG(ERR, PMD,"%s: xs_domain_open failed\n", __func__);
+		return -1;
+	}
+	buf = xs_read(xs, XBT_NULL, "domid", &len);
+	if (buf == NULL) {
+		RTE_LOG(ERR, PMD, "%s: failed read domid\n", __func__);
+		return -1;
+	}
+	errno = 0;
+	domid = strtoul(buf, &end, 0);
+	if (errno != 0 || end == NULL || end == buf ||  domid == 0)
+		return -1;
+
+	RTE_LOG(INFO, PMD, "retrieved dom ID = %d\n", domid);
+
+	dompath = xs_get_domain_path(xs, domid);
+	if (dompath == NULL)
+		return -1;
+
+	xs_transaction_start(xs); /* When to stop transaction */
+
+	if (cleanup == 0) {
+		if (xenstore_cleanup())
+			return -1;
+		cleanup = 1;
+	}
+
+	return 0;
+}
+
+int
+xenstore_write(const char *key_str, const char *val_str)
+{
+	char grant_path[PATH_MAX];
+	int rv, len;
+
+	if (xs == NULL) {
+		RTE_LOG(ERR, PMD, "%s: xenstore init failed\n", __func__);
+		return -1;
+	}
+	rv = snprintf(grant_path, sizeof(grant_path), "%s%s", dompath, key_str);
+	if (rv == -1) {
+		RTE_LOG(ERR, PMD, "%s: snprintf %s %s failed\n",
+			__func__, dompath, key_str);
+		return -1;
+	}
+	len = strnlen(val_str, PATH_MAX);
+
+	if (xs_write(xs, XBT_NULL, grant_path, val_str, len) == false) {
+		RTE_LOG(ERR, PMD, "%s: xs_write failed\n", __func__);
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+grant_node_create(uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, char *val_str, size_t str_size)
+{
+	uint64_t start_index;
+	int pg_size;
+	uint32_t pg_shift;
+	void *ptr = NULL;
+	uint32_t count, entries_per_pg;
+	uint32_t i, j = 0, k = 0;;
+	uint32_t *gref_tmp;
+	int first = 1;
+	char tmp_str[PATH_MAX] = {0};
+	int rv = -1;
+
+	pg_size = getpagesize();
+	if (rte_is_power_of_2(pg_size) == 0) {
+		return -1;
+	}
+	pg_shift = rte_bsf32(pg_size);
+	if (pg_size % sizeof(struct grant_node_item)) {
+		RTE_LOG(ERR, PMD, "pg_size isn't a multiple of grant node item\n");
+		return -1;
+	}
+
+	entries_per_pg = pg_size / sizeof(struct grant_node_item);
+	count  = (pg_num +  entries_per_pg - 1 ) / entries_per_pg;
+	gref_tmp = malloc(count * sizeof(uint32_t));
+	if (gref_tmp == NULL)
+		return -1;
+	ptr = gntalloc(pg_size * count, gref_tmp, &start_index);
+	if (ptr == NULL) {
+		RTE_LOG(ERR, PMD, "%s: gntalloc error of %d pages\n", __func__, count);
+		free(gref_tmp);
+		return -1;
+	}
+
+	while (j < pg_num) {
+		if (first) {
+			rv = snprintf(val_str, str_size, "%u", gref_tmp[k]);
+			first = 0;
+		} else {
+			snprintf(tmp_str, PATH_MAX, "%s", val_str);
+			rv = snprintf(val_str, str_size, "%s,%u", tmp_str, gref_tmp[k]);
+		}
+		k++;
+		if (rv == -1)
+			break;
+
+		for (i = 0; i < entries_per_pg && j < pg_num ; i++) {
+			((struct grant_node_item *)ptr)->gref = gref_arr[j];
+			((struct grant_node_item *)ptr)->pfn =  pa_arr[j] >> pg_shift;
+			ptr = RTE_PTR_ADD(ptr, sizeof(struct grant_node_item));
+			j++;
+		}
+	}
+	if (rv == -1) {
+		gntfree(ptr, pg_size * count, start_index);
+	} else
+		rv = 0;
+	free(gref_tmp);
+	return rv;
+}
+
+
+int
+grant_gntalloc_mbuf_pool(struct rte_mempool *mpool, uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, int mempool_idx)
+{
+	char key_str[PATH_MAX] = {0};
+	char val_str[PATH_MAX] = {0};
+
+	if (grant_node_create(pg_num, gref_arr, pa_arr, val_str, sizeof(val_str))) {
+		return -1;
+	}
+
+	if (snprintf(key_str, sizeof(key_str),
+		DPDK_XENSTORE_PATH"%d"MEMPOOL_XENSTORE_STR, mempool_idx) == -1)
+		return -1;
+	if (xenstore_write(key_str, val_str) == -1)
+		return -1;
+
+	if (snprintf(key_str, sizeof(key_str),
+		DPDK_XENSTORE_PATH"%d"MEMPOOL_VA_XENSTORE_STR, mempool_idx) == -1)
+		return -1;
+	if (snprintf(val_str, sizeof(val_str), "%"PRIxPTR, (uintptr_t)mpool->elt_va_start) == -1)
+		return -1;
+	if (xenstore_write(key_str, val_str) == -1)
+		return -1;
+
+	return 0;
+}
diff --git a/drivers/net/xenvirt/rte_xen_lib.h b/drivers/net/xenvirt/rte_xen_lib.h
new file mode 100644
index 0000000..0ba7148
--- /dev/null
+++ b/drivers/net/xenvirt/rte_xen_lib.h
@@ -0,0 +1,113 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 _RTE_XEN_DUMMY_PMD_H
+#define _RTE_XEN_DUMMY_PMD_H
+
+#include <stdint.h>
+
+#include <rte_common.h>
+#include <rte_mempool.h>
+#include <rte_ether.h>
+
+#define	PAGEMAP_FNAME           "/proc/self/pagemap"
+#define XEN_GNTALLOC_FNAME      "/dev/xen/gntalloc"
+#define DPDK_XENSTORE_PATH      "/control/dpdk/"
+#define DPDK_XENSTORE_NODE      "/control/dpdk"
+/*format 0_mempool_gref = "1537,1524,1533" */
+#define MEMPOOL_XENSTORE_STR    "_mempool_gref"
+/*format 0_mempool_va = 0x80340000 */
+#define MEMPOOL_VA_XENSTORE_STR "_mempool_va"
+/*format 0_rx_vring_gref  = "1537,1524,1533" */
+#define RXVRING_XENSTORE_STR    "_rx_vring_gref"
+/*format 0_tx_vring_gref  = "1537,1524,1533" */
+#define TXVRING_XENSTORE_STR    "_tx_vring_gref"
+#define VRING_FLAG_STR          "_vring_flag"
+/*format: event_type_start_0 = 1*/
+#define EVENT_TYPE_START_STR    "event_type_start_"
+
+#define DOM0_DOMID 0
+/*
+ * the pfn (page frame number) are bits 0-54 (see pagemap.txt in linux
+ * Documentation).
+ */
+#define PAGEMAP_PFN_BITS	54
+#define PAGEMAP_PFN_MASK	RTE_LEN2MASK(PAGEMAP_PFN_BITS, phys_addr_t)
+
+#define MAP_FLAG	0xA5
+
+#define RTE_ETH_XENVIRT_PAIRS_DELIM ';'
+#define RTE_ETH_XENVIRT_KEY_VALUE_DELIM '='
+#define RTE_ETH_XENVIRT_MAX_ARGS 1
+#define RTE_ETH_XENVIRT_MAC_PARAM "mac"
+struct xenvirt_dict {
+	uint8_t addr_valid;
+	struct ether_addr addr;
+};
+
+extern int gntalloc_fd;
+
+int
+gntalloc_open(void);
+
+void
+gntalloc_close(void);
+
+void *
+gntalloc(size_t sz, uint32_t *gref, uint64_t *start_index);
+
+void
+gntfree(void *va, size_t sz, uint64_t start_index);
+
+int
+xenstore_init(void);
+
+int
+xenstore_write(const char *key_str, const char *val_str);
+
+int
+get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz);
+
+void *
+get_xen_virtual(size_t size, size_t page_sz);
+
+int
+grefwatch_from_alloc(uint32_t *gref, void **pptr);
+
+
+int grant_node_create(uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, char *val_str, size_t str_size);
+
+int
+grant_gntalloc_mbuf_pool(struct rte_mempool *mpool, uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, int mempool_idx);
+
+#endif
diff --git a/drivers/net/xenvirt/virtio_logs.h b/drivers/net/xenvirt/virtio_logs.h
new file mode 100644
index 0000000..d6c33f7
--- /dev/null
+++ b/drivers/net/xenvirt/virtio_logs.h
@@ -0,0 +1,70 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 _VIRTIO_LOGS_H_
+#define _VIRTIO_LOGS_H_
+
+#include <rte_log.h>
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_INIT
+#define PMD_INIT_LOG(level, fmt, args...) \
+	RTE_LOG(level, PMD, "%s(): " fmt "\n", __func__, ## args)
+#define PMD_INIT_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>")
+#else
+#define PMD_INIT_LOG(level, fmt, args...) do { } while(0)
+#define PMD_INIT_FUNC_TRACE() do { } while(0)
+#endif
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_RX
+#define PMD_RX_LOG(level, fmt, args...) \
+	RTE_LOG(level, PMD, "%s() rx: " fmt , __func__, ## args)
+#else
+#define PMD_RX_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_TX
+#define PMD_TX_LOG(level, fmt, args...) \
+	RTE_LOG(level, PMD, "%s() tx: " fmt , __func__, ## args)
+#else
+#define PMD_TX_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DRIVER
+#define PMD_DRV_LOG(level, fmt, args...) \
+	RTE_LOG(level, PMD, "%s(): " fmt , __func__, ## args)
+#else
+#define PMD_DRV_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+#endif /* _VIRTIO_LOGS_H_ */
diff --git a/drivers/net/xenvirt/virtqueue.h b/drivers/net/xenvirt/virtqueue.h
new file mode 100644
index 0000000..eff6208
--- /dev/null
+++ b/drivers/net/xenvirt/virtqueue.h
@@ -0,0 +1,280 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   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
+ *   OWNER 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 _VIRTQUEUE_H_
+#define _VIRTQUEUE_H_
+
+#include <stdint.h>
+#include <linux/virtio_ring.h>
+#include <linux/virtio_net.h>
+
+#include <rte_atomic.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_mempool.h>
+
+#include "virtio_logs.h"
+
+struct rte_mbuf;
+
+/* The alignment to use between consumer and producer parts of vring. */
+#define VIRTIO_PCI_VRING_ALIGN 4096
+
+/*
+ * Address translatio is between gva<->hva,
+ * rather than gpa<->hva in virito spec.
+ */
+#define RTE_MBUF_DATA_DMA_ADDR(mb) \
+	rte_pktmbuf_mtod(mb, uint64_t)
+
+enum { VTNET_RQ = 0, VTNET_TQ = 1, VTNET_CQ = 2 };
+
+/**
+ * The maximum virtqueue size is 2^15. Use that value as the end of
+ * descriptor chain terminator since it will never be a valid index
+ * in the descriptor table. This is used to verify we are correctly
+ * handling vq_free_cnt.
+ */
+#define VQ_RING_DESC_CHAIN_END 32768
+
+#define VIRTQUEUE_MAX_NAME_SZ  32
+
+struct pmd_internals {
+	struct rte_eth_stats eth_stats;
+	int port_id;
+	int virtio_idx;
+};
+
+
+struct virtqueue {
+	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
+	struct rte_mempool       *mpool;  /**< mempool for mbuf allocation */
+	uint16_t    queue_id;             /**< DPDK queue index. */
+	uint16_t    vq_queue_index;       /**< PCI queue index */
+	uint8_t     port_id;              /**< Device port identifier. */
+
+	void        *vq_ring_virt_mem;    /**< virtual address of vring*/
+	int         vq_alignment;
+	int         vq_ring_size;
+
+	struct vring vq_ring;    /**< vring keeping desc, used and avail */
+	struct pmd_internals *internals;  /**< virtio device internal info. */
+	uint16_t    vq_nentries; /**< vring desc numbers */
+	uint16_t    vq_desc_head_idx;
+	uint16_t    vq_free_cnt; /**< num of desc available */
+	uint16_t vq_used_cons_idx; /**< Last consumed desc in used table, trails vq_ring.used->idx*/
+
+	struct vq_desc_extra {
+		void              *cookie;
+		uint16_t          ndescs;
+	} vq_descx[0] __rte_cache_aligned;
+};
+
+
+#ifdef  RTE_LIBRTE_XENVIRT_DEBUG_DUMP
+#define VIRTQUEUE_DUMP(vq) do { \
+	uint16_t used_idx, nused; \
+	used_idx = (vq)->vq_ring.used->idx; \
+	nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
+	PMD_INIT_LOG(DEBUG, \
+	  "VQ: %s - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
+	  " avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \
+	  " avail.flags=0x%x; used.flags=0x%x\n", \
+	  (vq)->vq_name, (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
+	  (vq)->vq_desc_head_idx, (vq)->vq_ring.avail->idx, \
+	  (vq)->vq_used_cons_idx, (vq)->vq_ring.used->idx, \
+	  (vq)->vq_ring.avail->flags, (vq)->vq_ring.used->flags); \
+} while (0)
+#else
+#define VIRTQUEUE_DUMP(vq) do { } while (0)
+#endif
+
+
+/**
+ *  Dump virtqueue internal structures, for debug purpose only.
+ */
+void virtqueue_dump(struct virtqueue *vq);
+
+/**
+ *  Get all mbufs to be freed.
+ */
+struct rte_mbuf * virtqueue_detatch_unused(struct virtqueue *vq);
+
+static inline int __attribute__((always_inline))
+virtqueue_full(const struct virtqueue *vq)
+{
+	return (vq->vq_free_cnt == 0);
+}
+
+#define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx))
+
+static inline void __attribute__((always_inline))
+vq_ring_update_avail(struct virtqueue *vq, uint16_t desc_idx)
+{
+	uint16_t avail_idx;
+	/*
+	 * Place the head of the descriptor chain into the next slot and make
+	 * it usable to the host. The chain is made available now rather than
+	 * deferring to virtqueue_notify() in the hopes that if the host is
+	 * currently running on another CPU, we can keep it processing the new
+	 * descriptor.
+	 */
+	avail_idx = (uint16_t)(vq->vq_ring.avail->idx & (vq->vq_nentries - 1));
+	vq->vq_ring.avail->ring[avail_idx] = desc_idx;
+	rte_compiler_barrier();  /* wmb , for IA memory model barrier is enough*/
+	vq->vq_ring.avail->idx++;
+}
+
+static inline void  __attribute__((always_inline))
+vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
+{
+	struct vring_desc *dp;
+	struct vq_desc_extra *dxp;
+
+	dp  = &vq->vq_ring.desc[desc_idx];
+	dxp = &vq->vq_descx[desc_idx];
+	vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
+	while (dp->flags & VRING_DESC_F_NEXT) {
+		dp = &vq->vq_ring.desc[dp->next];
+	}
+	dxp->ndescs = 0;
+
+	/*
+	 * We must append the existing free chain, if any, to the end of
+	 * newly freed chain. If the virtqueue was completely used, then
+	 * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
+	 */
+	dp->next = vq->vq_desc_head_idx;
+	vq->vq_desc_head_idx = desc_idx;
+}
+
+static inline int  __attribute__((always_inline))
+virtqueue_enqueue_recv_refill(struct virtqueue *rxvq, struct rte_mbuf *cookie)
+{
+	const uint16_t needed = 1;
+	const uint16_t head_idx = rxvq->vq_desc_head_idx;
+	struct vring_desc *start_dp = rxvq->vq_ring.desc;
+	struct vq_desc_extra *dxp;
+
+	if (unlikely(rxvq->vq_free_cnt == 0))
+		return -ENOSPC;
+	if (unlikely(rxvq->vq_free_cnt < needed))
+		return -EMSGSIZE;
+	if (unlikely(head_idx >= rxvq->vq_nentries))
+		return -EFAULT;
+
+	dxp = &rxvq->vq_descx[head_idx];
+	dxp->cookie = (void *)cookie;
+	dxp->ndescs = needed;
+
+	start_dp[head_idx].addr  =
+		(uint64_t) ((uint64_t)cookie->buf_addr + RTE_PKTMBUF_HEADROOM - sizeof(struct virtio_net_hdr));
+	start_dp[head_idx].len   = cookie->buf_len - RTE_PKTMBUF_HEADROOM + sizeof(struct virtio_net_hdr);
+	start_dp[head_idx].flags = VRING_DESC_F_WRITE;
+	rxvq->vq_desc_head_idx   = start_dp[head_idx].next;
+	rxvq->vq_free_cnt        = (uint16_t)(rxvq->vq_free_cnt - needed);
+	vq_ring_update_avail(rxvq, head_idx);
+
+	return 0;
+}
+
+static inline int  __attribute__((always_inline))
+virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
+{
+
+	const uint16_t needed = 2;
+	struct vring_desc *start_dp =  txvq->vq_ring.desc;
+	uint16_t head_idx = txvq->vq_desc_head_idx;
+	uint16_t idx      = head_idx;
+	struct vq_desc_extra *dxp;
+
+	if (unlikely(txvq->vq_free_cnt == 0))
+		return -ENOSPC;
+	if (unlikely(txvq->vq_free_cnt < needed))
+		return -EMSGSIZE;
+	if (unlikely(head_idx >= txvq->vq_nentries))
+		return -EFAULT;
+
+	dxp = &txvq->vq_descx[idx];
+	dxp->cookie = (void *)cookie;
+	dxp->ndescs = needed;
+
+	start_dp = txvq->vq_ring.desc;
+	start_dp[idx].addr  = 0;
+/*
+ * TODO: save one desc here?
+ */
+	start_dp[idx].len   = sizeof(struct virtio_net_hdr);
+	start_dp[idx].flags = VRING_DESC_F_NEXT;
+	start_dp[idx].addr  = (uintptr_t)NULL;
+	idx = start_dp[idx].next;
+	start_dp[idx].addr  = RTE_MBUF_DATA_DMA_ADDR(cookie);
+	start_dp[idx].len   = cookie->data_len;
+	start_dp[idx].flags = 0;
+	idx = start_dp[idx].next;
+	txvq->vq_desc_head_idx = idx;
+	txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
+	vq_ring_update_avail(txvq, head_idx);
+
+	return 0;
+}
+
+static inline uint16_t  __attribute__((always_inline))
+virtqueue_dequeue_burst(struct virtqueue *vq, struct rte_mbuf **rx_pkts, uint32_t *len, uint16_t num)
+{
+	struct vring_used_elem *uep;
+	struct rte_mbuf *cookie;
+	uint16_t used_idx, desc_idx;
+	uint16_t i;
+	/*  Caller does the check */
+	for (i = 0; i < num ; i ++) {
+		used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
+		uep = &vq->vq_ring.used->ring[used_idx];
+		desc_idx = (uint16_t) uep->id;
+		cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
+		if (unlikely(cookie == NULL)) {
+			PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u\n",
+				vq->vq_used_cons_idx);
+			RTE_LOG(ERR, PMD, "%s: inconsistent (%u, %u)\n", __func__, used_idx , desc_idx);
+			break;
+		}
+		len[i] = uep->len;
+		rx_pkts[i]  = cookie;
+		vq->vq_used_cons_idx++;
+		vq_ring_free_chain(vq, desc_idx);
+		vq->vq_descx[desc_idx].cookie = NULL;
+	}
+	return i;
+}
+
+#endif /* _VIRTQUEUE_H_ */
diff --git a/lib/Makefile b/lib/Makefile
index 81cf0c1..5f480f9 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -41,7 +41,6 @@  DIRS-$(CONFIG_RTE_LIBRTE_TIMER) += librte_timer
 DIRS-$(CONFIG_RTE_LIBRTE_CFGFILE) += librte_cfgfile
 DIRS-$(CONFIG_RTE_LIBRTE_CMDLINE) += librte_cmdline
 DIRS-$(CONFIG_RTE_LIBRTE_ETHER) += librte_ether
-DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += librte_pmd_xenvirt
 DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += librte_vhost
 DIRS-$(CONFIG_RTE_LIBRTE_HASH) += librte_hash
 DIRS-$(CONFIG_RTE_LIBRTE_LPM) += librte_lpm
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index bc1e90d..077ea99 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -50,7 +50,7 @@  CFLAGS += -I$(RTE_SDK)/lib/librte_ivshmem
 CFLAGS += -I$(RTE_SDK)/drivers/net/ring
 CFLAGS += -I$(RTE_SDK)/drivers/net/pcap
 CFLAGS += -I$(RTE_SDK)/drivers/net/af_packet
-CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_xenvirt
+CFLAGS += -I$(RTE_SDK)/drivers/net/xenvirt
 CFLAGS += $(WERROR_FLAGS) -O3
 
 # specific to linuxapp exec-env
diff --git a/lib/librte_pmd_xenvirt/Makefile b/lib/librte_pmd_xenvirt/Makefile
deleted file mode 100644
index f0c796c..0000000
--- a/lib/librte_pmd_xenvirt/Makefile
+++ /dev/null
@@ -1,62 +0,0 @@ 
-#   BSD LICENSE
-#
-#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
-#   All rights reserved.
-#
-#   Redistribution and use in source and binary forms, with or without
-#   modification, are permitted provided that the following conditions
-#   are met:
-#
-#     * Redistributions of source code must retain the above copyright
-#       notice, this list of conditions and the following disclaimer.
-#     * 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.
-#     * Neither the name of Intel Corporation nor the names of its
-#       contributors may be used to endorse or promote products derived
-#       from this software without specific prior written permission.
-#
-#   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
-#   OWNER 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_SDK)/mk/rte.vars.mk
-
-#
-# library name
-#
-LIB = librte_pmd_xenvirt.a
-
-CFLAGS += -O3
-CFLAGS += $(WERROR_FLAGS)
-
-EXPORT_MAP := rte_eth_xenvirt_version.map
-
-LIBABIVER := 1
-
-#
-# all source are stored in SRCS-y
-#
-SRCS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += rte_eth_xenvirt.c rte_mempool_gntalloc.c rte_xen_lib.c
-
-#
-# Export include files
-#
-SYMLINK-y-include += rte_eth_xenvirt.h
-
-# this lib depends upon:
-DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_eal lib/librte_ether
-DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_mempool lib/librte_mbuf
-DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_net lib/librte_malloc
-DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += lib/librte_cmdline
-
-include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c b/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
deleted file mode 100644
index 73e8bce..0000000
--- a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
+++ /dev/null
@@ -1,714 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <errno.h>
-#include <sys/user.h>
-#include <linux/binfmts.h>
-#include <xen/xen-compat.h>
-#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
-#include <xs.h>
-#else
-#include <xenstore.h>
-#endif
-#include <linux/virtio_ring.h>
-
-#include <rte_mbuf.h>
-#include <rte_ethdev.h>
-#include <rte_malloc.h>
-#include <rte_memcpy.h>
-#include <rte_string_fns.h>
-#include <rte_dev.h>
-#include <cmdline_parse.h>
-#include <cmdline_parse_etheraddr.h>
-
-#include "rte_xen_lib.h"
-#include "virtqueue.h"
-#include "rte_eth_xenvirt.h"
-
-#define VQ_DESC_NUM 256
-#define VIRTIO_MBUF_BURST_SZ 64
-
-/* virtio_idx is increased after new device is created.*/
-static int virtio_idx = 0;
-
-static const char *drivername = "xen dummy virtio PMD";
-
-static struct rte_eth_link pmd_link = {
-		.link_speed = 10000,
-		.link_duplex = ETH_LINK_FULL_DUPLEX,
-		.link_status = 0
-};
-
-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 uint16_t
-eth_xenvirt_rx(void *q, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
-{
-	struct virtqueue *rxvq = q;
-	struct rte_mbuf *rxm, *new_mbuf;
-	uint16_t nb_used, num;
-	uint32_t len[VIRTIO_MBUF_BURST_SZ];
-	uint32_t i;
-	struct pmd_internals *pi = rxvq->internals;
-
-	nb_used = VIRTQUEUE_NUSED(rxvq);
-
-	rte_compiler_barrier(); /* rmb */
-	num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
-	num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ) ? num : VIRTIO_MBUF_BURST_SZ);
-	if (unlikely(num == 0)) return 0;
-
-	num = virtqueue_dequeue_burst(rxvq, rx_pkts, len, num);
-	PMD_RX_LOG(DEBUG, "used:%d dequeue:%d\n", nb_used, num);
-	for (i = 0; i < num ; i ++) {
-		rxm = rx_pkts[i];
-		PMD_RX_LOG(DEBUG, "packet len:%d\n", len[i]);
-		rxm->next = NULL;
-		rxm->data_off = RTE_PKTMBUF_HEADROOM;
-		rxm->data_len = (uint16_t)(len[i] - sizeof(struct virtio_net_hdr));
-		rxm->nb_segs = 1;
-		rxm->port = pi->port_id;
-		rxm->pkt_len  = (uint32_t)(len[i] - sizeof(struct virtio_net_hdr));
-	}
-	/* allocate new mbuf for the used descriptor */
-	while (likely(!virtqueue_full(rxvq))) {
-		new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
-		if (unlikely(new_mbuf == NULL)) {
-			break;
-		}
-		if (unlikely(virtqueue_enqueue_recv_refill(rxvq, new_mbuf))) {
-			rte_pktmbuf_free_seg(new_mbuf);
-			break;
-		}
-	}
-	pi->eth_stats.ipackets += num;
-	return num;
-}
-
-static uint16_t
-eth_xenvirt_tx(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
-{
-	struct virtqueue *txvq = tx_queue;
-	struct rte_mbuf *txm;
-	uint16_t nb_used, nb_tx, num, i;
-	int error;
-	uint32_t len[VIRTIO_MBUF_BURST_SZ];
-	struct rte_mbuf *snd_pkts[VIRTIO_MBUF_BURST_SZ];
-	struct pmd_internals *pi = txvq->internals;
-
-	nb_tx = 0;
-
-	if (unlikely(nb_pkts == 0))
-		return 0;
-
-	PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
-	nb_used = VIRTQUEUE_NUSED(txvq);
-
-	rte_compiler_barrier();   /* rmb */
-
-	num = (uint16_t)(likely(nb_used <= VIRTIO_MBUF_BURST_SZ) ? nb_used : VIRTIO_MBUF_BURST_SZ);
-	num = virtqueue_dequeue_burst(txvq, snd_pkts, len, num);
-
-	for (i = 0; i < num ; i ++) {
-		/* mergable not supported, one segment only */
-		rte_pktmbuf_free_seg(snd_pkts[i]);
-	}
-
-	while (nb_tx < nb_pkts) {
-		if (likely(!virtqueue_full(txvq))) {
-		/* TODO drop tx_pkts if it contains multiple segments */
-			txm = tx_pkts[nb_tx];
-			error = virtqueue_enqueue_xmit(txvq, txm);
-			if (unlikely(error)) {
-				if (error == ENOSPC)
-					PMD_TX_LOG(ERR, "virtqueue_enqueue Free count = 0\n");
-				else if (error == EMSGSIZE)
-					PMD_TX_LOG(ERR, "virtqueue_enqueue Free count < 1\n");
-				else
-					PMD_TX_LOG(ERR, "virtqueue_enqueue error: %d\n", error);
-				break;
-			}
-			nb_tx++;
-		} else {
-			PMD_TX_LOG(ERR, "No free tx descriptors to transmit\n");
-			/* virtqueue_notify not needed in our para-virt solution */
-			break;
-		}
-	}
-	pi->eth_stats.opackets += nb_tx;
-	return nb_tx;
-}
-
-static int
-eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
-{
-	RTE_LOG(ERR, PMD, "%s\n", __func__);
-	return 0;
-}
-
-/*
- * Create a shared page between guest and host.
- * Host monitors this page if it is cleared on unmap, and then
- * do necessary clean up.
- */
-static void
-gntalloc_vring_flag(int vtidx)
-{
-	char key_str[PATH_MAX];
-	char val_str[PATH_MAX];
-	uint32_t gref_tmp;
-	void *ptr;
-
-	if (grefwatch_from_alloc(&gref_tmp, &ptr)) {
-		RTE_LOG(ERR, PMD, "grefwatch_from_alloc error\n");
-		exit(0);
-	}
-
-	*(uint8_t *)ptr = MAP_FLAG;
-	snprintf(val_str, sizeof(val_str), "%u", gref_tmp);
-	snprintf(key_str, sizeof(key_str),
-		DPDK_XENSTORE_PATH"%d"VRING_FLAG_STR, vtidx);
-	xenstore_write(key_str, val_str);
-}
-
-/*
- * Notify host this virtio device is started.
- * Host could start polling this device.
- */
-static void
-dev_start_notify(int vtidx)
-{
-	char key_str[PATH_MAX];
-	char val_str[PATH_MAX];
-
-	RTE_LOG(INFO, PMD, "%s: virtio %d is started\n", __func__, vtidx);
-	gntalloc_vring_flag(vtidx);
-
-	snprintf(key_str, sizeof(key_str), "%s%s%d",
-		DPDK_XENSTORE_PATH, EVENT_TYPE_START_STR,
-			vtidx);
-	snprintf(val_str, sizeof(val_str), "1");
-	xenstore_write(key_str, val_str);
-}
-
-/*
- * Notify host this virtio device is stopped.
- * Host could stop polling this device.
- */
-static void
-dev_stop_notify(int vtidx)
-{
-	RTE_SET_USED(vtidx);
-}
-
-
-static int
-update_mac_address(struct ether_addr *mac_addrs, int vtidx)
-{
-	char key_str[PATH_MAX];
-	char val_str[PATH_MAX];
-	int rv;
-
-	if (mac_addrs == NULL) {
-		RTE_LOG(ERR, PMD, "%s: NULL pointer mac specified\n", __func__);
-		return -1;
-	}
-	rv = snprintf(key_str, sizeof(key_str),
-			DPDK_XENSTORE_PATH"%d_ether_addr", vtidx);
-	if (rv == -1)
-		return rv;
-	rv = snprintf(val_str, sizeof(val_str), "%02x:%02x:%02x:%02x:%02x:%02x",
-			mac_addrs->addr_bytes[0],
-			mac_addrs->addr_bytes[1],
-			mac_addrs->addr_bytes[2],
-			mac_addrs->addr_bytes[3],
-			mac_addrs->addr_bytes[4],
-			mac_addrs->addr_bytes[5]);
-	if (rv == -1)
-		return rv;
-	if (xenstore_write(key_str, val_str))
-		return rv;
-	return 0;
-}
-
-
-static int
-eth_dev_start(struct rte_eth_dev *dev)
-{
-	struct virtqueue *rxvq = dev->data->rx_queues[0];
-	struct virtqueue *txvq = dev->data->tx_queues[0];
-	struct rte_mbuf *m;
-	struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
-	int rv;
-
-	dev->data->dev_link.link_status = 1;
-	while (!virtqueue_full(rxvq)) {
-		m = rte_rxmbuf_alloc(rxvq->mpool);
-		if (m == NULL)
-			break;
-		/* Enqueue allocated buffers. */
-		if (virtqueue_enqueue_recv_refill(rxvq, m)) {
-			rte_pktmbuf_free_seg(m);
-			break;
-		}
-	}
-
-	rxvq->internals = pi;
-	txvq->internals = pi;
-
-	rv = update_mac_address(dev->data->mac_addrs, pi->virtio_idx);
-	if (rv)
-		return -1;
-	dev_start_notify(pi->virtio_idx);
-
-	return 0;
-}
-
-static void
-eth_dev_stop(struct rte_eth_dev *dev)
-{
-	struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
-
-	dev->data->dev_link.link_status = 0;
-	dev_stop_notify(pi->virtio_idx);
-}
-
-/*
- * Notify host this virtio device is closed.
- * Host could do necessary clean up to this device.
- */
-static void
-eth_dev_close(struct rte_eth_dev *dev)
-{
-	RTE_SET_USED(dev);
-}
-
-static void
-eth_dev_info(struct rte_eth_dev *dev,
-		struct rte_eth_dev_info *dev_info)
-{
-	struct pmd_internals *internals = dev->data->dev_private;
-
-	RTE_SET_USED(internals);
-	dev_info->driver_name = drivername;
-	dev_info->max_mac_addrs = 1;
-	dev_info->max_rx_pktlen = (uint32_t)2048;
-	dev_info->max_rx_queues = (uint16_t)1;
-	dev_info->max_tx_queues = (uint16_t)1;
-	dev_info->min_rx_bufsize = 0;
-	dev_info->pci_dev = NULL;
-}
-
-static void
-eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
-{
-	struct pmd_internals *internals = dev->data->dev_private;
-	if(stats)
-		rte_memcpy(stats, &internals->eth_stats, sizeof(*stats));
-}
-
-static void
-eth_stats_reset(struct rte_eth_dev *dev)
-{
-	struct pmd_internals *internals = dev->data->dev_private;
-	/* Reset software totals */
-	memset(&internals->eth_stats, 0, sizeof(internals->eth_stats));
-}
-
-static void
-eth_queue_release(void *q __rte_unused)
-{
-}
-
-static int
-eth_link_update(struct rte_eth_dev *dev __rte_unused,
-		int wait_to_complete __rte_unused)
-{
-	return 0;
-}
-
-/*
- * Create shared vring between guest and host.
- * Memory is allocated through grant alloc driver, so it is not physical continuous.
- */
-static void *
-gntalloc_vring_create(int queue_type, uint32_t size, int vtidx)
-{
-	char key_str[PATH_MAX] = {0};
-	char val_str[PATH_MAX] = {0};
-	void *va = NULL;
-	int pg_size;
-	uint32_t pg_num;
-	uint32_t *gref_arr = NULL;
-	phys_addr_t *pa_arr = NULL;
-	uint64_t start_index;
-	int rv;
-
-	pg_size = getpagesize();
-	size    = RTE_ALIGN_CEIL(size, pg_size);
-	pg_num  = size / pg_size;
-
-	gref_arr = calloc(pg_num, sizeof(gref_arr[0]));
-	pa_arr  = calloc(pg_num, sizeof(pa_arr[0]));
-
-	if (gref_arr == NULL || pa_arr == NULL) {
-		RTE_LOG(ERR, PMD, "%s: calloc failed\n", __func__);
-		goto out;
-	}
-
-	va  = gntalloc(size, gref_arr, &start_index);
-	if (va == NULL) {
-		RTE_LOG(ERR, PMD, "%s: gntalloc failed\n", __func__);
-		goto out;
-	}
-
-	if (get_phys_map(va, pa_arr, pg_num, pg_size))
-		goto out;
-
-	/* write in xenstore gref and pfn for each page of vring */
-	if (grant_node_create(pg_num, gref_arr, pa_arr, val_str, sizeof(val_str))) {
-		gntfree(va, size, start_index);
-		va = NULL;
-		goto out;
-	}
-
-	if (queue_type == VTNET_RQ)
-		rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"RXVRING_XENSTORE_STR, vtidx);
-	else
-		rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"TXVRING_XENSTORE_STR, vtidx);
-	if (rv == -1 || xenstore_write(key_str, val_str) == -1) {
-		gntfree(va, size, start_index);
-		va = NULL;
-	}
-out:
-	if (pa_arr)
-		free(pa_arr);
-	if (gref_arr)
-		free(gref_arr);
-
-	return va;
-}
-
-
-
-static struct virtqueue *
-virtio_queue_setup(struct rte_eth_dev *dev, int queue_type)
-{
-	struct virtqueue *vq = NULL;
-	uint16_t vq_size = VQ_DESC_NUM;
-	int i = 0;
-	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
-	size_t size;
-	struct vring *vr;
-
-	/* Allocate memory for virtqueue. */
-	if (queue_type == VTNET_RQ) {
-		snprintf(vq_name, sizeof(vq_name), "port%d_rvq",
-				dev->data->port_id);
-		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
-			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
-		if (vq == NULL) {
-			RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
-			return NULL;
-		}
-		memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
-	} else if(queue_type == VTNET_TQ) {
-		snprintf(vq_name, sizeof(vq_name), "port%d_tvq",
-			dev->data->port_id);
-		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
-			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
-		if (vq == NULL) {
-			RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
-			return NULL;
-		}
-		memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
-	}
-
-	memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
-
-	vq->vq_alignment = VIRTIO_PCI_VRING_ALIGN;
-	vq->vq_nentries = vq_size;
-	vq->vq_free_cnt = vq_size;
-	/* Calcuate vring size according to virtio spec */
-	size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
-	vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
-	/* Allocate memory for virtio vring through gntalloc driver*/
-	vq->vq_ring_virt_mem = gntalloc_vring_create(queue_type, vq->vq_ring_size,
-		((struct pmd_internals *)dev->data->dev_private)->virtio_idx);
-	memset(vq->vq_ring_virt_mem, 0, vq->vq_ring_size);
-	vr = &vq->vq_ring;
-	vring_init(vr, vq_size, vq->vq_ring_virt_mem, vq->vq_alignment);
-	/*
-	 * Locally maintained last consumed index, this idex trails
-	 * vq_ring.used->idx.
-	 */
-	vq->vq_used_cons_idx = 0;
-	vq->vq_desc_head_idx = 0;
-	vq->vq_free_cnt = vq->vq_nentries;
-	memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
-
-	/* Chain all the descriptors in the ring with an END */
-	for (i = 0; i < vq_size - 1; i++)
-		vr->desc[i].next = (uint16_t)(i + 1);
-	vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
-
-	return vq;
-}
-
-static int
-eth_rx_queue_setup(struct rte_eth_dev *dev,uint16_t rx_queue_id,
-				uint16_t nb_rx_desc __rte_unused,
-				unsigned int socket_id __rte_unused,
-				const struct rte_eth_rxconf *rx_conf __rte_unused,
-				struct rte_mempool *mb_pool)
-{
-	struct virtqueue *vq;
-	vq = dev->data->rx_queues[rx_queue_id] = virtio_queue_setup(dev, VTNET_RQ);
-	vq->mpool = mb_pool;
-	return 0;
-}
-
-static int
-eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
-				uint16_t nb_tx_desc __rte_unused,
-				unsigned int socket_id __rte_unused,
-				const struct rte_eth_txconf *tx_conf __rte_unused)
-{
-	dev->data->tx_queues[tx_queue_id] = virtio_queue_setup(dev, VTNET_TQ);
-	return 0;
-}
-
-
-
-static const struct eth_dev_ops ops = {
-	.dev_start = eth_dev_start,
-	.dev_stop = eth_dev_stop,
-	.dev_close = eth_dev_close,
-	.dev_configure = eth_dev_configure,
-	.dev_infos_get = eth_dev_info,
-	.rx_queue_setup = eth_rx_queue_setup,
-	.tx_queue_setup = eth_tx_queue_setup,
-	.rx_queue_release = eth_queue_release,
-	.tx_queue_release = eth_queue_release,
-	.link_update = eth_link_update,
-	.stats_get = eth_stats_get,
-	.stats_reset = eth_stats_reset,
-};
-
-
-static int
-rte_eth_xenvirt_parse_args(struct xenvirt_dict *dict,
-			const char *name, const char *params)
-{
-	int i;
-	char *pairs[RTE_ETH_XENVIRT_MAX_ARGS];
-	int num_of_pairs;
-	char *pair[2];
-	char *args;
-	int ret = -1;
-
-	if (params == NULL)
-		return 0;
-
-	args = rte_zmalloc(NULL, strlen(params) + 1, RTE_CACHE_LINE_SIZE);
-	if (args == NULL) {
-		RTE_LOG(ERR, PMD, "Couldn't parse %s device \n", name);
-		return -1;
-	}
-	rte_memcpy(args, params, strlen(params));
-
-	num_of_pairs = rte_strsplit(args, strnlen(args, MAX_ARG_STRLEN),
-					pairs,
-					RTE_ETH_XENVIRT_MAX_ARGS ,
-					RTE_ETH_XENVIRT_PAIRS_DELIM);
-
-	for (i = 0; i < num_of_pairs; i++) {
-		pair[0] = NULL;
-		pair[1] = NULL;
-		rte_strsplit(pairs[i], strnlen(pairs[i], MAX_ARG_STRLEN),
-					pair, 2,
-					RTE_ETH_XENVIRT_KEY_VALUE_DELIM);
-
-		if (pair[0] == NULL || pair[1] == NULL || pair[0][0] == 0
-			|| pair[1][0] == 0) {
-			RTE_LOG(ERR, PMD,
-				"Couldn't parse %s device,"
-				"wrong key or value \n", name);
-			goto err;
-		}
-
-		if (!strncmp(pair[0], RTE_ETH_XENVIRT_MAC_PARAM,
-				sizeof(RTE_ETH_XENVIRT_MAC_PARAM))) {
-			if (cmdline_parse_etheraddr(NULL,
-						    pair[1],
-						    &dict->addr,
-						    sizeof(dict->addr)) < 0) {
-				RTE_LOG(ERR, PMD,
-					"Invalid %s device ether address\n",
-					name);
-				goto err;
-			}
-
-			dict->addr_valid = 1;
-		}
-	}
-
-	ret = 0;
-err:
-	rte_free(args);
-	return ret;
-}
-
-enum dev_action {
-	DEV_CREATE,
-	DEV_ATTACH
-};
-
-
-static int
-eth_dev_xenvirt_create(const char *name, const char *params,
-		const unsigned numa_node,
-                enum dev_action action)
-{
-	struct rte_eth_dev_data *data = NULL;
-	struct rte_pci_device *pci_dev = NULL;
-	struct pmd_internals *internals = NULL;
-	struct rte_eth_dev *eth_dev = NULL;
-	struct xenvirt_dict dict;
-	bzero(&dict, sizeof(struct xenvirt_dict));
-
-	RTE_LOG(INFO, PMD, "Creating virtio rings backed ethdev on numa socket %u\n",
-			numa_node);
-	RTE_SET_USED(action);
-
-	if (rte_eth_xenvirt_parse_args(&dict, name, params) < 0) {
-		RTE_LOG(ERR, PMD, "%s: Failed to parse ethdev parameters\n", __func__);
-		return -1;
-	}
-
-	/* now do all data allocation - for eth_dev structure, dummy pci driver
-	 * and internal (private) data
-	 */
-	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
-	if (data == NULL)
-		goto err;
-
-	pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
-	if (pci_dev == NULL)
-		goto err;
-
-	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
-	if (internals == NULL)
-		goto err;
-
-	/* reserve an ethdev entry */
-	eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
-	if (eth_dev == NULL)
-		goto err;
-
-	pci_dev->numa_node = numa_node;
-
-	data->dev_private = internals;
-	data->port_id = eth_dev->data->port_id;
-	data->nb_rx_queues = (uint16_t)1;
-	data->nb_tx_queues = (uint16_t)1;
-	data->dev_link = pmd_link;
-	data->mac_addrs = rte_zmalloc("xen_virtio", ETHER_ADDR_LEN, 0);
-
-	if(dict.addr_valid)
-		memcpy(&data->mac_addrs->addr_bytes, &dict.addr, sizeof(struct ether_addr));
-	else
-		eth_random_addr(&data->mac_addrs->addr_bytes[0]);
-
-	eth_dev->data = data;
-	eth_dev->dev_ops = &ops;
-	eth_dev->pci_dev = pci_dev;
-
-	eth_dev->rx_pkt_burst = eth_xenvirt_rx;
-	eth_dev->tx_pkt_burst = eth_xenvirt_tx;
-
-	internals->virtio_idx = virtio_idx++;
-	internals->port_id = eth_dev->data->port_id;
-
-	return 0;
-
-err:
-	rte_free(data);
-	rte_free(pci_dev);
-	rte_free(internals);
-
-	return -1;
-}
-
-
-/*TODO: Support multiple process model */
-static int
-rte_pmd_xenvirt_devinit(const char *name, const char *params)
-{
-	if (virtio_idx == 0) {
-		if (xenstore_init() != 0) {
-			RTE_LOG(ERR, PMD, "%s: xenstore init failed\n", __func__);
-			return -1;
-		}
-		if (gntalloc_open() != 0) {
-			RTE_LOG(ERR, PMD, "%s: grant init failed\n", __func__);
-			return -1;
-		}
-	}
-	eth_dev_xenvirt_create(name, params, rte_socket_id(), DEV_CREATE);
-	return 0;
-}
-
-static struct rte_driver pmd_xenvirt_drv = {
-	.name = "eth_xenvirt",
-	.type = PMD_VDEV,
-	.init = rte_pmd_xenvirt_devinit,
-};
-
-PMD_REGISTER_DRIVER(pmd_xenvirt_drv);
diff --git a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.h b/lib/librte_pmd_xenvirt/rte_eth_xenvirt.h
deleted file mode 100644
index fc15a63..0000000
--- a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.h
+++ /dev/null
@@ -1,62 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 _RTE_ETH_XENVIRT_H_
-#define _RTE_ETH_XENVIRT_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <rte_mempool.h>
-#include <rte_ring.h>
-
-/**
- * Creates mempool for xen virtio PMD.
- * This function uses memzone_reserve to allocate memory for meta data,
- * and uses grant alloc driver to allocate memory for data area.
- * The input parameters are exactly the same as rte_mempool_create.
- */
-struct rte_mempool *
-rte_mempool_gntalloc_create(const char *name, unsigned elt_num, unsigned elt_size,
-		   unsigned cache_size, unsigned private_data_size,
-		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
-		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
-		   int socket_id, unsigned flags);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/lib/librte_pmd_xenvirt/rte_eth_xenvirt_version.map b/lib/librte_pmd_xenvirt/rte_eth_xenvirt_version.map
deleted file mode 100644
index dd636f7..0000000
--- a/lib/librte_pmd_xenvirt/rte_eth_xenvirt_version.map
+++ /dev/null
@@ -1,7 +0,0 @@ 
-DPDK_2.0 {
-	global:
-
-	rte_mempool_gntalloc_create;
-
-	local: *;
-};
diff --git a/lib/librte_pmd_xenvirt/rte_mempool_gntalloc.c b/lib/librte_pmd_xenvirt/rte_mempool_gntalloc.c
deleted file mode 100644
index 3a650e8..0000000
--- a/lib/librte_pmd_xenvirt/rte_mempool_gntalloc.c
+++ /dev/null
@@ -1,298 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <string.h>
-#include <xen/sys/gntalloc.h>
-
-#include <rte_common.h>
-#include <rte_mempool.h>
-#include <rte_memory.h>
-#include <rte_errno.h>
-
-#include "rte_xen_lib.h"
-#include "rte_eth_xenvirt.h"
-
-struct _gntarr {
-	uint32_t gref;
-	phys_addr_t pa;
-	uint64_t index;
-	void *va;
-};
-
-struct _mempool_gntalloc_info {
-	struct rte_mempool *mp;
-	uint32_t pg_num;
-	uint32_t *gref_arr;
-	phys_addr_t *pa_arr;
-	void *va;
-	uint32_t mempool_idx;
-	uint64_t start_index;
-};
-
-
-static rte_atomic32_t global_xenvirt_mempool_idx = RTE_ATOMIC32_INIT(-1);
-
-static int
-compare(const void *p1, const void *p2)
-{
-	return ((const struct _gntarr *)p1)->pa  - ((const struct _gntarr *)p2)->pa;
-}
-
-
-static struct _mempool_gntalloc_info
-_create_mempool(const char *name, unsigned elt_num, unsigned elt_size,
-		   unsigned cache_size, unsigned private_data_size,
-		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
-		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
-		   int socket_id, unsigned flags)
-{
-	struct _mempool_gntalloc_info mgi;
-	struct rte_mempool *mp = NULL;
-	struct rte_mempool_objsz  objsz;
-	uint32_t pg_num, rpg_num, pg_shift, pg_sz;
-	char *va, *orig_va, *uv; /* uv: from which, the pages could be freed */
-	ssize_t sz, usz; /* usz: unused size */
-	/*
-	 * for each page allocated through xen_gntalloc driver,
-	 * gref_arr:stores grant references,
-	 * pa_arr: stores physical address,
-	 * gnt_arr: stores all meta dat
-	 */
-	uint32_t *gref_arr = NULL;
-	phys_addr_t *pa_arr = NULL;
-	struct _gntarr *gnt_arr = NULL;
-	/* start index of the grant referances, used for dealloc*/
-	uint64_t start_index;
-	uint32_t i, j;
-	int rv = 0;
-	struct ioctl_gntalloc_dealloc_gref arg;
-
-	mgi.mp = NULL;
-	va = orig_va = uv = NULL;
-	pg_num = rpg_num = 0;
-	sz = 0;
-
-	pg_sz = getpagesize();
-	if (rte_is_power_of_2(pg_sz) == 0) {
-		goto out;
-	}
-	pg_shift = rte_bsf32(pg_sz);
-
-	rte_mempool_calc_obj_size(elt_size, flags, &objsz);
-	sz = rte_mempool_xmem_size(elt_num, objsz.total_size, pg_shift);
-	pg_num = sz >> pg_shift;
-
-	pa_arr = calloc(pg_num, sizeof(pa_arr[0]));
-	gref_arr = calloc(pg_num, sizeof(gref_arr[0]));
-	gnt_arr  = calloc(pg_num, sizeof(gnt_arr[0]));
-	if ((gnt_arr == NULL) || (gref_arr == NULL) || (pa_arr == NULL))
-		goto out;
-
-	/* grant index is continuous in ascending order */
-	orig_va = gntalloc(sz, gref_arr, &start_index);
-	if (orig_va == NULL)
-		goto out;
-
-	get_phys_map(orig_va, pa_arr, pg_num, pg_sz);
-	for (i = 0; i < pg_num; i++) {
-		gnt_arr[i].index = start_index + i * pg_sz;
-		gnt_arr[i].gref = gref_arr[i];
-		gnt_arr[i].pa = pa_arr[i];
-		gnt_arr[i].va  = RTE_PTR_ADD(orig_va, i * pg_sz);
-	}
-	qsort(gnt_arr, pg_num, sizeof(struct _gntarr), compare);
-
-	va = get_xen_virtual(sz, pg_sz);
-	if (va == NULL) {
-		goto out;
-	}
-
-	/*
-	 * map one by one, as index isn't continuous now.
-	 * pg_num VMAs, doesn't linux has a limitation on this?
-	 */
-	for (i = 0; i < pg_num; i++) {
-	/* update gref_arr and pa_arr after sort */
-		gref_arr[i] = gnt_arr[i].gref;
-		pa_arr[i]   = gnt_arr[i].pa;
-		gnt_arr[i].va = mmap(va + i * pg_sz, pg_sz, PROT_READ | PROT_WRITE,
-			MAP_SHARED | MAP_FIXED, gntalloc_fd, gnt_arr[i].index);
-		if ((gnt_arr[i].va == MAP_FAILED) || (gnt_arr[i].va != (va + i * pg_sz))) {
-			RTE_LOG(ERR, PMD, "failed to map %d pages\n", i);
-			goto mmap_failed;
-		}
-	}
-
-	/*
-	 * Check that allocated size is big enough to hold elt_num
-	 * objects and a calcualte how many bytes are actually required.
-	 */
-	usz = rte_mempool_xmem_usage(va, elt_num, objsz.total_size, pa_arr, pg_num, pg_shift);
-	if (usz < 0) {
-		mp = NULL;
-		i = pg_num;
-		goto mmap_failed;
-	} else {
-		/* unmap unused pages if any */
-		uv = RTE_PTR_ADD(va, usz);
-		if ((usz = va + sz - uv) > 0) {
-
-			RTE_LOG(ERR, PMD,
-				"%s(%s): unmap unused %zu of %zu "
-				"mmaped bytes @%p orig:%p\n",
-				__func__, name, usz, sz, uv, va);
-			munmap(uv, usz);
-			i = (sz - usz) / pg_sz;
-			for (; i < pg_num; i++) {
-				arg.count = 1;
-				arg.index = gnt_arr[i].index;
-				rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg);
-				if (rv) {
-					/* shouldn't fail here */
-					RTE_LOG(ERR, PMD, "va=%p pa=%p index=%p %s\n",
-						gnt_arr[i].va,
-						(void *)gnt_arr[i].pa,
-						(void *)arg.index, strerror(errno));
-					rte_panic("gntdealloc failed when freeing pages\n");
-				}
-			}
-
-			rpg_num = (sz - usz) >> pg_shift;
-		} else
-			rpg_num = pg_num;
-
-		mp = rte_mempool_xmem_create(name, elt_num, elt_size,
-				cache_size, private_data_size,
-				mp_init, mp_init_arg,
-				obj_init, obj_init_arg,
-				socket_id, flags, va, pa_arr, rpg_num, pg_shift);
-
-		RTE_VERIFY(elt_num == mp->size);
-	}
-	mgi.mp = mp;
-	mgi.pg_num = rpg_num;
-	mgi.gref_arr = gref_arr;
-	mgi.pa_arr = pa_arr;
-	if (mp)
-		mgi.mempool_idx = rte_atomic32_add_return(&global_xenvirt_mempool_idx, 1);
-	mgi.start_index = start_index;
-	mgi.va = va;
-
-	if (mp == NULL) {
-		i = pg_num;
-		goto mmap_failed;
-	}
-
-/*
- * unmap only, without deallocate grant reference.
- * unused pages have already been unmaped,
- * unmap twice will fail, but it is safe.
- */
-mmap_failed:
-	for (j = 0; j < i; j++) {
-		if (gnt_arr[i].va)
-			munmap(gnt_arr[i].va, pg_sz);
-	}
-out:
-	if (gnt_arr)
-		free(gnt_arr);
-	if (orig_va)
-		munmap(orig_va, sz);
-	if (mp == NULL) {
-		if (gref_arr)
-			free(gref_arr);
-		if (pa_arr)
-			free(pa_arr);
-
-		/* some gref has already been de-allocated from the list in the driver,
-		 * so dealloc one by one, and it is safe to deallocate twice
-		 */
-		if (orig_va) {
-			for (i = 0; i < pg_num; i++) {
-				arg.index = start_index + i * pg_sz;
-				rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg);
-			}
-		}
-	}
-	return mgi;
-}
-
-struct rte_mempool *
-rte_mempool_gntalloc_create(const char *name, unsigned elt_num, unsigned elt_size,
-		   unsigned cache_size, unsigned private_data_size,
-		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
-		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
-		   int socket_id, unsigned flags)
-{
-	int rv;
-	uint32_t i;
-	struct _mempool_gntalloc_info mgi;
-	struct ioctl_gntalloc_dealloc_gref arg;
-	int pg_sz = getpagesize();
-
-	mgi = _create_mempool(name, elt_num, elt_size,
-			cache_size, private_data_size,
-			mp_init, mp_init_arg,
-			obj_init, obj_init_arg,
-			socket_id, flags);
-	if (mgi.mp) {
-		rv = grant_gntalloc_mbuf_pool(mgi.mp,
-			mgi.pg_num,
-			mgi.gref_arr,
-			mgi.pa_arr,
-			mgi.mempool_idx);
-		free(mgi.gref_arr);
-		free(mgi.pa_arr);
-		if (rv == 0)
-			return mgi.mp;
-		/*
-		 * in _create_mempool, unused pages have already been unmapped, deallocagted
-		 * unmap and dealloc the remained ones here.
-		 */
-		munmap(mgi.va, pg_sz * mgi.pg_num);
-		for (i = 0; i < mgi.pg_num; i++) {
-			arg.index = mgi.start_index + i * pg_sz;
-			rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg);
-		}
-		return NULL;
-	}
-	return NULL;
-
-
-
-}
diff --git a/lib/librte_pmd_xenvirt/rte_xen_lib.c b/lib/librte_pmd_xenvirt/rte_xen_lib.c
deleted file mode 100644
index b3932f0..0000000
--- a/lib/librte_pmd_xenvirt/rte_xen_lib.c
+++ /dev/null
@@ -1,428 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <xen/xen-compat.h>
-#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
-#include <xs.h>
-#else
-#include <xenstore.h>
-#endif
-#include <xen/sys/gntalloc.h>
-
-#include <rte_common.h>
-#include <rte_string_fns.h>
-
-#include "rte_xen_lib.h"
-
-/*
- * The grant node format in xenstore for vring/mpool is:
- * 0_rx_vring_gref = "gref1#, gref2#, gref3#"
- * 0_mempool_gref  = "gref1#, gref2#, gref3#"
- * each gref# is a grant reference for a shared page.
- * In each shared page, we store the grant_node_item items.
- */
-struct grant_node_item {
-	uint32_t gref;
-	uint32_t pfn;
-} __attribute__((packed));
-
-/* fd for xen_gntalloc driver, used to allocate grant pages*/
-int gntalloc_fd = -1;
-
-/* xenstore path for local domain, now it is '/local/domain/domid/' */
-static char *dompath = NULL;
-/* handle to xenstore read/write operations */
-static struct xs_handle *xs = NULL;
-
-/*
- * Reserve a virtual address space.
- * On success, returns the pointer. On failure, returns NULL.
- */
-void *
-get_xen_virtual(size_t size, size_t page_sz)
-{
-	void *addr;
-	uintptr_t aligned_addr;
-
-	addr = mmap(NULL, size + page_sz, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
-	if (addr == MAP_FAILED) {
-		RTE_LOG(ERR, PMD, "failed get a virtual area\n");
-		return NULL;
-	}
-
-	aligned_addr = RTE_ALIGN_CEIL((uintptr_t)addr, page_sz);
-	addr = (void *)(aligned_addr);
-
-	return addr;
-}
-
-/*
- * Get the physical address for virtual memory starting at va.
- */
-int
-get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz)
-{
-	int32_t fd, rc = 0;
-	uint32_t i, nb;
-	off_t ofs;
-
-	ofs = (uintptr_t)va / pg_sz * sizeof(*pa);
-	nb = pg_num * sizeof(*pa);
-
-	if ((fd = open(PAGEMAP_FNAME, O_RDONLY)) < 0 ||
-			(rc = pread(fd, pa, nb, ofs)) < 0 ||
-			(rc -= nb) != 0) {
-		RTE_LOG(ERR, PMD, "%s: failed read of %u bytes from \'%s\' "
-			"at offset %zu, error code: %d\n",
-			__func__, nb, PAGEMAP_FNAME, ofs, errno);
-		rc = ENOENT;
-	}
-
-	close(fd);
-	for (i = 0; i != pg_num; i++)
-		pa[i] = (pa[i] & PAGEMAP_PFN_MASK) * pg_sz;
-
-	return rc;
-}
-
-int
-gntalloc_open(void)
-{
-	gntalloc_fd = open(XEN_GNTALLOC_FNAME, O_RDWR);
-	return (gntalloc_fd != -1) ? 0 : -1;
-}
-
-void
-gntalloc_close(void)
-{
-	if (gntalloc_fd != -1)
-		close(gntalloc_fd);
-	gntalloc_fd = -1;
-}
-
-void *
-gntalloc(size_t size, uint32_t *gref, uint64_t *start_index)
-{
-	int page_size = getpagesize();
-	uint32_t i, pg_num;
-	void *va;
-	int rv;
-	struct ioctl_gntalloc_alloc_gref *arg;
-	struct ioctl_gntalloc_dealloc_gref arg_d;
-
-	if (size % page_size) {
-		RTE_LOG(ERR, PMD, "%s: %zu isn't multiple of page size\n",
-			__func__, size);
-		return NULL;
-	}
-
-	pg_num = size / page_size;
-	arg = malloc(sizeof(*arg) + (pg_num - 1) * sizeof(uint32_t));
-	if (arg == NULL)
-		return NULL;
-	arg->domid = DOM0_DOMID;
-	arg->flags = GNTALLOC_FLAG_WRITABLE;
-	arg->count = pg_num;
-
-	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_ALLOC_GREF, arg);
-	if (rv) {
-		RTE_LOG(ERR, PMD, "%s: ioctl error\n", __func__);
-		free(arg);
-		return NULL;
-	}
-
-	va = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, gntalloc_fd, arg->index);
-	if (va == MAP_FAILED) {
-		RTE_LOG(ERR, PMD, "%s: mmap failed\n", __func__);
-		arg_d.count = pg_num;
-		arg_d.index = arg->index;
-		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, arg_d);
-		free(arg);
-		return NULL;
-	}
-
-	if (gref) {
-		for (i = 0; i < pg_num; i++) {
-			gref[i] = arg->gref_ids[i];
-		}
-	}
-	if (start_index)
-		*start_index = arg->index;
-
-	free(arg);
-
-	return va;
-}
-
-int
-grefwatch_from_alloc(uint32_t *gref, void **pptr)
-{
-	int rv;
-	void *ptr;
-	int pg_size = getpagesize();
-	struct ioctl_gntalloc_alloc_gref arg = {
-		.domid = DOM0_DOMID,
-		.flags = GNTALLOC_FLAG_WRITABLE,
-		.count = 1
-	};
-	struct ioctl_gntalloc_dealloc_gref arg_d;
-	struct ioctl_gntalloc_unmap_notify notify = {
-		.action = UNMAP_NOTIFY_CLEAR_BYTE
-	};
-
-	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_ALLOC_GREF, &arg);
-	if (rv) {
-		RTE_LOG(ERR, PMD, "%s: ioctl error\n", __func__);
-		return -1;
-	}
-
-	ptr = (void *)mmap(NULL, pg_size, PROT_READ|PROT_WRITE, MAP_SHARED, gntalloc_fd, arg.index);
-	arg_d.index = arg.index;
-	arg_d.count = 1;
-	if (ptr == MAP_FAILED) {
-		RTE_LOG(ERR, PMD, "%s: mmap failed\n", __func__);
-		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
-		return -1;
-	}
-	if (pptr)
-		*pptr = ptr;
-	if (gref)
-		*gref = arg.gref_ids[0];
-
-	notify.index = arg.index;
-	rv = ioctl(gntalloc_fd, IOCTL_GNTALLOC_SET_UNMAP_NOTIFY, &notify);
-	if (rv) {
-		RTE_LOG(ERR, PMD, "%s: unmap notify failed\n", __func__);
-		munmap(ptr, pg_size);
-		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
-		return -1;
-	}
-
-	return 0;
-}
-
-void
-gntfree(void *va, size_t sz, uint64_t start_index)
-{
-	struct ioctl_gntalloc_dealloc_gref arg_d;
-
-	if (va && sz) {
-		munmap(va, sz);
-		arg_d.count = sz / getpagesize();
-		arg_d.index = start_index;
-		ioctl(gntalloc_fd, IOCTL_GNTALLOC_DEALLOC_GREF, &arg_d);
-	}
-}
-
-static int
-xenstore_cleanup(void)
-{
-	char store_path[PATH_MAX] = {0};
-
-	if (snprintf(store_path, sizeof(store_path),
-		"%s%s", dompath, DPDK_XENSTORE_NODE) == -1)
-		return -1;
-
-	if (xs_rm(xs, XBT_NULL, store_path) == false) {
-		RTE_LOG(ERR, PMD, "%s: failed cleanup node\n", __func__);
-		return -1;
-	}
-
-	return 0;
-}
-
-int
-xenstore_init(void)
-{
-	unsigned int len, domid;
-	char *buf;
-	static int cleanup = 0;
-	char *end;
-
-	xs = xs_domain_open();
-	if (xs == NULL) {
-		RTE_LOG(ERR, PMD,"%s: xs_domain_open failed\n", __func__);
-		return -1;
-	}
-	buf = xs_read(xs, XBT_NULL, "domid", &len);
-	if (buf == NULL) {
-		RTE_LOG(ERR, PMD, "%s: failed read domid\n", __func__);
-		return -1;
-	}
-	errno = 0;
-	domid = strtoul(buf, &end, 0);
-	if (errno != 0 || end == NULL || end == buf ||  domid == 0)
-		return -1;
-
-	RTE_LOG(INFO, PMD, "retrieved dom ID = %d\n", domid);
-
-	dompath = xs_get_domain_path(xs, domid);
-	if (dompath == NULL)
-		return -1;
-
-	xs_transaction_start(xs); /* When to stop transaction */
-
-	if (cleanup == 0) {
-		if (xenstore_cleanup())
-			return -1;
-		cleanup = 1;
-	}
-
-	return 0;
-}
-
-int
-xenstore_write(const char *key_str, const char *val_str)
-{
-	char grant_path[PATH_MAX];
-	int rv, len;
-
-	if (xs == NULL) {
-		RTE_LOG(ERR, PMD, "%s: xenstore init failed\n", __func__);
-		return -1;
-	}
-	rv = snprintf(grant_path, sizeof(grant_path), "%s%s", dompath, key_str);
-	if (rv == -1) {
-		RTE_LOG(ERR, PMD, "%s: snprintf %s %s failed\n",
-			__func__, dompath, key_str);
-		return -1;
-	}
-	len = strnlen(val_str, PATH_MAX);
-
-	if (xs_write(xs, XBT_NULL, grant_path, val_str, len) == false) {
-		RTE_LOG(ERR, PMD, "%s: xs_write failed\n", __func__);
-		return -1;
-	}
-
-	return 0;
-}
-
-int
-grant_node_create(uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, char *val_str, size_t str_size)
-{
-	uint64_t start_index;
-	int pg_size;
-	uint32_t pg_shift;
-	void *ptr = NULL;
-	uint32_t count, entries_per_pg;
-	uint32_t i, j = 0, k = 0;;
-	uint32_t *gref_tmp;
-	int first = 1;
-	char tmp_str[PATH_MAX] = {0};
-	int rv = -1;
-
-	pg_size = getpagesize();
-	if (rte_is_power_of_2(pg_size) == 0) {
-		return -1;
-	}
-	pg_shift = rte_bsf32(pg_size);
-	if (pg_size % sizeof(struct grant_node_item)) {
-		RTE_LOG(ERR, PMD, "pg_size isn't a multiple of grant node item\n");
-		return -1;
-	}
-
-	entries_per_pg = pg_size / sizeof(struct grant_node_item);
-	count  = (pg_num +  entries_per_pg - 1 ) / entries_per_pg;
-	gref_tmp = malloc(count * sizeof(uint32_t));
-	if (gref_tmp == NULL)
-		return -1;
-	ptr = gntalloc(pg_size * count, gref_tmp, &start_index);
-	if (ptr == NULL) {
-		RTE_LOG(ERR, PMD, "%s: gntalloc error of %d pages\n", __func__, count);
-		free(gref_tmp);
-		return -1;
-	}
-
-	while (j < pg_num) {
-		if (first) {
-			rv = snprintf(val_str, str_size, "%u", gref_tmp[k]);
-			first = 0;
-		} else {
-			snprintf(tmp_str, PATH_MAX, "%s", val_str);
-			rv = snprintf(val_str, str_size, "%s,%u", tmp_str, gref_tmp[k]);
-		}
-		k++;
-		if (rv == -1)
-			break;
-
-		for (i = 0; i < entries_per_pg && j < pg_num ; i++) {
-			((struct grant_node_item *)ptr)->gref = gref_arr[j];
-			((struct grant_node_item *)ptr)->pfn =  pa_arr[j] >> pg_shift;
-			ptr = RTE_PTR_ADD(ptr, sizeof(struct grant_node_item));
-			j++;
-		}
-	}
-	if (rv == -1) {
-		gntfree(ptr, pg_size * count, start_index);
-	} else
-		rv = 0;
-	free(gref_tmp);
-	return rv;
-}
-
-
-int
-grant_gntalloc_mbuf_pool(struct rte_mempool *mpool, uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, int mempool_idx)
-{
-	char key_str[PATH_MAX] = {0};
-	char val_str[PATH_MAX] = {0};
-
-	if (grant_node_create(pg_num, gref_arr, pa_arr, val_str, sizeof(val_str))) {
-		return -1;
-	}
-
-	if (snprintf(key_str, sizeof(key_str),
-		DPDK_XENSTORE_PATH"%d"MEMPOOL_XENSTORE_STR, mempool_idx) == -1)
-		return -1;
-	if (xenstore_write(key_str, val_str) == -1)
-		return -1;
-
-	if (snprintf(key_str, sizeof(key_str),
-		DPDK_XENSTORE_PATH"%d"MEMPOOL_VA_XENSTORE_STR, mempool_idx) == -1)
-		return -1;
-	if (snprintf(val_str, sizeof(val_str), "%"PRIxPTR, (uintptr_t)mpool->elt_va_start) == -1)
-		return -1;
-	if (xenstore_write(key_str, val_str) == -1)
-		return -1;
-
-	return 0;
-}
diff --git a/lib/librte_pmd_xenvirt/rte_xen_lib.h b/lib/librte_pmd_xenvirt/rte_xen_lib.h
deleted file mode 100644
index 0ba7148..0000000
--- a/lib/librte_pmd_xenvirt/rte_xen_lib.h
+++ /dev/null
@@ -1,113 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 _RTE_XEN_DUMMY_PMD_H
-#define _RTE_XEN_DUMMY_PMD_H
-
-#include <stdint.h>
-
-#include <rte_common.h>
-#include <rte_mempool.h>
-#include <rte_ether.h>
-
-#define	PAGEMAP_FNAME           "/proc/self/pagemap"
-#define XEN_GNTALLOC_FNAME      "/dev/xen/gntalloc"
-#define DPDK_XENSTORE_PATH      "/control/dpdk/"
-#define DPDK_XENSTORE_NODE      "/control/dpdk"
-/*format 0_mempool_gref = "1537,1524,1533" */
-#define MEMPOOL_XENSTORE_STR    "_mempool_gref"
-/*format 0_mempool_va = 0x80340000 */
-#define MEMPOOL_VA_XENSTORE_STR "_mempool_va"
-/*format 0_rx_vring_gref  = "1537,1524,1533" */
-#define RXVRING_XENSTORE_STR    "_rx_vring_gref"
-/*format 0_tx_vring_gref  = "1537,1524,1533" */
-#define TXVRING_XENSTORE_STR    "_tx_vring_gref"
-#define VRING_FLAG_STR          "_vring_flag"
-/*format: event_type_start_0 = 1*/
-#define EVENT_TYPE_START_STR    "event_type_start_"
-
-#define DOM0_DOMID 0
-/*
- * the pfn (page frame number) are bits 0-54 (see pagemap.txt in linux
- * Documentation).
- */
-#define PAGEMAP_PFN_BITS	54
-#define PAGEMAP_PFN_MASK	RTE_LEN2MASK(PAGEMAP_PFN_BITS, phys_addr_t)
-
-#define MAP_FLAG	0xA5
-
-#define RTE_ETH_XENVIRT_PAIRS_DELIM ';'
-#define RTE_ETH_XENVIRT_KEY_VALUE_DELIM '='
-#define RTE_ETH_XENVIRT_MAX_ARGS 1
-#define RTE_ETH_XENVIRT_MAC_PARAM "mac"
-struct xenvirt_dict {
-	uint8_t addr_valid;
-	struct ether_addr addr;
-};
-
-extern int gntalloc_fd;
-
-int
-gntalloc_open(void);
-
-void
-gntalloc_close(void);
-
-void *
-gntalloc(size_t sz, uint32_t *gref, uint64_t *start_index);
-
-void
-gntfree(void *va, size_t sz, uint64_t start_index);
-
-int
-xenstore_init(void);
-
-int
-xenstore_write(const char *key_str, const char *val_str);
-
-int
-get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz);
-
-void *
-get_xen_virtual(size_t size, size_t page_sz);
-
-int
-grefwatch_from_alloc(uint32_t *gref, void **pptr);
-
-
-int grant_node_create(uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, char *val_str, size_t str_size);
-
-int
-grant_gntalloc_mbuf_pool(struct rte_mempool *mpool, uint32_t pg_num, uint32_t *gref_arr, phys_addr_t *pa_arr, int mempool_idx);
-
-#endif
diff --git a/lib/librte_pmd_xenvirt/virtio_logs.h b/lib/librte_pmd_xenvirt/virtio_logs.h
deleted file mode 100644
index d6c33f7..0000000
--- a/lib/librte_pmd_xenvirt/virtio_logs.h
+++ /dev/null
@@ -1,70 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 _VIRTIO_LOGS_H_
-#define _VIRTIO_LOGS_H_
-
-#include <rte_log.h>
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_INIT
-#define PMD_INIT_LOG(level, fmt, args...) \
-	RTE_LOG(level, PMD, "%s(): " fmt "\n", __func__, ## args)
-#define PMD_INIT_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>")
-#else
-#define PMD_INIT_LOG(level, fmt, args...) do { } while(0)
-#define PMD_INIT_FUNC_TRACE() do { } while(0)
-#endif
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_RX
-#define PMD_RX_LOG(level, fmt, args...) \
-	RTE_LOG(level, PMD, "%s() rx: " fmt , __func__, ## args)
-#else
-#define PMD_RX_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_TX
-#define PMD_TX_LOG(level, fmt, args...) \
-	RTE_LOG(level, PMD, "%s() tx: " fmt , __func__, ## args)
-#else
-#define PMD_TX_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DRIVER
-#define PMD_DRV_LOG(level, fmt, args...) \
-	RTE_LOG(level, PMD, "%s(): " fmt , __func__, ## args)
-#else
-#define PMD_DRV_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-#endif /* _VIRTIO_LOGS_H_ */
diff --git a/lib/librte_pmd_xenvirt/virtqueue.h b/lib/librte_pmd_xenvirt/virtqueue.h
deleted file mode 100644
index eff6208..0000000
--- a/lib/librte_pmd_xenvirt/virtqueue.h
+++ /dev/null
@@ -1,280 +0,0 @@ 
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   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
- *   OWNER 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 _VIRTQUEUE_H_
-#define _VIRTQUEUE_H_
-
-#include <stdint.h>
-#include <linux/virtio_ring.h>
-#include <linux/virtio_net.h>
-
-#include <rte_atomic.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_mempool.h>
-
-#include "virtio_logs.h"
-
-struct rte_mbuf;
-
-/* The alignment to use between consumer and producer parts of vring. */
-#define VIRTIO_PCI_VRING_ALIGN 4096
-
-/*
- * Address translatio is between gva<->hva,
- * rather than gpa<->hva in virito spec.
- */
-#define RTE_MBUF_DATA_DMA_ADDR(mb) \
-	rte_pktmbuf_mtod(mb, uint64_t)
-
-enum { VTNET_RQ = 0, VTNET_TQ = 1, VTNET_CQ = 2 };
-
-/**
- * The maximum virtqueue size is 2^15. Use that value as the end of
- * descriptor chain terminator since it will never be a valid index
- * in the descriptor table. This is used to verify we are correctly
- * handling vq_free_cnt.
- */
-#define VQ_RING_DESC_CHAIN_END 32768
-
-#define VIRTQUEUE_MAX_NAME_SZ  32
-
-struct pmd_internals {
-	struct rte_eth_stats eth_stats;
-	int port_id;
-	int virtio_idx;
-};
-
-
-struct virtqueue {
-	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
-	struct rte_mempool       *mpool;  /**< mempool for mbuf allocation */
-	uint16_t    queue_id;             /**< DPDK queue index. */
-	uint16_t    vq_queue_index;       /**< PCI queue index */
-	uint8_t     port_id;              /**< Device port identifier. */
-
-	void        *vq_ring_virt_mem;    /**< virtual address of vring*/
-	int         vq_alignment;
-	int         vq_ring_size;
-
-	struct vring vq_ring;    /**< vring keeping desc, used and avail */
-	struct pmd_internals *internals;  /**< virtio device internal info. */
-	uint16_t    vq_nentries; /**< vring desc numbers */
-	uint16_t    vq_desc_head_idx;
-	uint16_t    vq_free_cnt; /**< num of desc available */
-	uint16_t vq_used_cons_idx; /**< Last consumed desc in used table, trails vq_ring.used->idx*/
-
-	struct vq_desc_extra {
-		void              *cookie;
-		uint16_t          ndescs;
-	} vq_descx[0] __rte_cache_aligned;
-};
-
-
-#ifdef  RTE_LIBRTE_XENVIRT_DEBUG_DUMP
-#define VIRTQUEUE_DUMP(vq) do { \
-	uint16_t used_idx, nused; \
-	used_idx = (vq)->vq_ring.used->idx; \
-	nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
-	PMD_INIT_LOG(DEBUG, \
-	  "VQ: %s - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
-	  " avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \
-	  " avail.flags=0x%x; used.flags=0x%x\n", \
-	  (vq)->vq_name, (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
-	  (vq)->vq_desc_head_idx, (vq)->vq_ring.avail->idx, \
-	  (vq)->vq_used_cons_idx, (vq)->vq_ring.used->idx, \
-	  (vq)->vq_ring.avail->flags, (vq)->vq_ring.used->flags); \
-} while (0)
-#else
-#define VIRTQUEUE_DUMP(vq) do { } while (0)
-#endif
-
-
-/**
- *  Dump virtqueue internal structures, for debug purpose only.
- */
-void virtqueue_dump(struct virtqueue *vq);
-
-/**
- *  Get all mbufs to be freed.
- */
-struct rte_mbuf * virtqueue_detatch_unused(struct virtqueue *vq);
-
-static inline int __attribute__((always_inline))
-virtqueue_full(const struct virtqueue *vq)
-{
-	return (vq->vq_free_cnt == 0);
-}
-
-#define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx))
-
-static inline void __attribute__((always_inline))
-vq_ring_update_avail(struct virtqueue *vq, uint16_t desc_idx)
-{
-	uint16_t avail_idx;
-	/*
-	 * Place the head of the descriptor chain into the next slot and make
-	 * it usable to the host. The chain is made available now rather than
-	 * deferring to virtqueue_notify() in the hopes that if the host is
-	 * currently running on another CPU, we can keep it processing the new
-	 * descriptor.
-	 */
-	avail_idx = (uint16_t)(vq->vq_ring.avail->idx & (vq->vq_nentries - 1));
-	vq->vq_ring.avail->ring[avail_idx] = desc_idx;
-	rte_compiler_barrier();  /* wmb , for IA memory model barrier is enough*/
-	vq->vq_ring.avail->idx++;
-}
-
-static inline void  __attribute__((always_inline))
-vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
-{
-	struct vring_desc *dp;
-	struct vq_desc_extra *dxp;
-
-	dp  = &vq->vq_ring.desc[desc_idx];
-	dxp = &vq->vq_descx[desc_idx];
-	vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
-	while (dp->flags & VRING_DESC_F_NEXT) {
-		dp = &vq->vq_ring.desc[dp->next];
-	}
-	dxp->ndescs = 0;
-
-	/*
-	 * We must append the existing free chain, if any, to the end of
-	 * newly freed chain. If the virtqueue was completely used, then
-	 * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
-	 */
-	dp->next = vq->vq_desc_head_idx;
-	vq->vq_desc_head_idx = desc_idx;
-}
-
-static inline int  __attribute__((always_inline))
-virtqueue_enqueue_recv_refill(struct virtqueue *rxvq, struct rte_mbuf *cookie)
-{
-	const uint16_t needed = 1;
-	const uint16_t head_idx = rxvq->vq_desc_head_idx;
-	struct vring_desc *start_dp = rxvq->vq_ring.desc;
-	struct vq_desc_extra *dxp;
-
-	if (unlikely(rxvq->vq_free_cnt == 0))
-		return -ENOSPC;
-	if (unlikely(rxvq->vq_free_cnt < needed))
-		return -EMSGSIZE;
-	if (unlikely(head_idx >= rxvq->vq_nentries))
-		return -EFAULT;
-
-	dxp = &rxvq->vq_descx[head_idx];
-	dxp->cookie = (void *)cookie;
-	dxp->ndescs = needed;
-
-	start_dp[head_idx].addr  =
-		(uint64_t) ((uint64_t)cookie->buf_addr + RTE_PKTMBUF_HEADROOM - sizeof(struct virtio_net_hdr));
-	start_dp[head_idx].len   = cookie->buf_len - RTE_PKTMBUF_HEADROOM + sizeof(struct virtio_net_hdr);
-	start_dp[head_idx].flags = VRING_DESC_F_WRITE;
-	rxvq->vq_desc_head_idx   = start_dp[head_idx].next;
-	rxvq->vq_free_cnt        = (uint16_t)(rxvq->vq_free_cnt - needed);
-	vq_ring_update_avail(rxvq, head_idx);
-
-	return 0;
-}
-
-static inline int  __attribute__((always_inline))
-virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
-{
-
-	const uint16_t needed = 2;
-	struct vring_desc *start_dp =  txvq->vq_ring.desc;
-	uint16_t head_idx = txvq->vq_desc_head_idx;
-	uint16_t idx      = head_idx;
-	struct vq_desc_extra *dxp;
-
-	if (unlikely(txvq->vq_free_cnt == 0))
-		return -ENOSPC;
-	if (unlikely(txvq->vq_free_cnt < needed))
-		return -EMSGSIZE;
-	if (unlikely(head_idx >= txvq->vq_nentries))
-		return -EFAULT;
-
-	dxp = &txvq->vq_descx[idx];
-	dxp->cookie = (void *)cookie;
-	dxp->ndescs = needed;
-
-	start_dp = txvq->vq_ring.desc;
-	start_dp[idx].addr  = 0;
-/*
- * TODO: save one desc here?
- */
-	start_dp[idx].len   = sizeof(struct virtio_net_hdr);
-	start_dp[idx].flags = VRING_DESC_F_NEXT;
-	start_dp[idx].addr  = (uintptr_t)NULL;
-	idx = start_dp[idx].next;
-	start_dp[idx].addr  = RTE_MBUF_DATA_DMA_ADDR(cookie);
-	start_dp[idx].len   = cookie->data_len;
-	start_dp[idx].flags = 0;
-	idx = start_dp[idx].next;
-	txvq->vq_desc_head_idx = idx;
-	txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
-	vq_ring_update_avail(txvq, head_idx);
-
-	return 0;
-}
-
-static inline uint16_t  __attribute__((always_inline))
-virtqueue_dequeue_burst(struct virtqueue *vq, struct rte_mbuf **rx_pkts, uint32_t *len, uint16_t num)
-{
-	struct vring_used_elem *uep;
-	struct rte_mbuf *cookie;
-	uint16_t used_idx, desc_idx;
-	uint16_t i;
-	/*  Caller does the check */
-	for (i = 0; i < num ; i ++) {
-		used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
-		uep = &vq->vq_ring.used->ring[used_idx];
-		desc_idx = (uint16_t) uep->id;
-		cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
-		if (unlikely(cookie == NULL)) {
-			PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u\n",
-				vq->vq_used_cons_idx);
-			RTE_LOG(ERR, PMD, "%s: inconsistent (%u, %u)\n", __func__, used_idx , desc_idx);
-			break;
-		}
-		len[i] = uep->len;
-		rx_pkts[i]  = cookie;
-		vq->vq_used_cons_idx++;
-		vq_ring_free_chain(vq, desc_idx);
-		vq->vq_descx[desc_idx].cookie = NULL;
-	}
-	return i;
-}
-
-#endif /* _VIRTQUEUE_H_ */