diff mbox

[dpdk-dev,5/7] hv: poll mode driver

Message ID 1423098809-21305-6-git-send-email-stephen@networkplumber.org (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Stephen Hemminger Feb. 5, 2015, 1:13 a.m. UTC
From: Stephen Hemminger <shemming@brocade.com>

This is new Poll Mode driver for using hyper-v virtual network
interface.

Signed-off-by: Stas Egorov <segorov@mirantis.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/Makefile                          |    1 +
 lib/librte_pmd_hyperv/Makefile        |   28 +
 lib/librte_pmd_hyperv/hyperv.h        |  169 ++++
 lib/librte_pmd_hyperv/hyperv_drv.c    | 1660 +++++++++++++++++++++++++++++++++
 lib/librte_pmd_hyperv/hyperv_drv.h    |  558 +++++++++++
 lib/librte_pmd_hyperv/hyperv_ethdev.c |  334 +++++++
 lib/librte_pmd_hyperv/hyperv_logs.h   |   68 ++
 lib/librte_pmd_hyperv/hyperv_rxtx.c   |  402 ++++++++
 lib/librte_pmd_hyperv/hyperv_rxtx.h   |   35 +
 mk/rte.app.mk                         |    4 +
 10 files changed, 3259 insertions(+)
 create mode 100644 lib/librte_pmd_hyperv/Makefile
 create mode 100644 lib/librte_pmd_hyperv/hyperv.h
 create mode 100644 lib/librte_pmd_hyperv/hyperv_drv.c
 create mode 100644 lib/librte_pmd_hyperv/hyperv_drv.h
 create mode 100644 lib/librte_pmd_hyperv/hyperv_ethdev.c
 create mode 100644 lib/librte_pmd_hyperv/hyperv_logs.h
 create mode 100644 lib/librte_pmd_hyperv/hyperv_rxtx.c
 create mode 100644 lib/librte_pmd_hyperv/hyperv_rxtx.h
diff mbox

Patch

diff --git a/lib/Makefile b/lib/Makefile
index d617d81..2b48ba7 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -45,6 +45,7 @@  DIRS-$(CONFIG_RTE_LIBRTE_E1000_PMD) += librte_pmd_e1000
 DIRS-$(CONFIG_RTE_LIBRTE_IXGBE_PMD) += librte_pmd_ixgbe
 DIRS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += librte_pmd_i40e
 DIRS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += librte_pmd_enic
+DIRS-$(CONFIG_RTE_LIBRTE_HV_PMD) += librte_pmd_hyperv
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_BOND) += librte_pmd_bond
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += librte_pmd_ring
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += librte_pmd_pcap
diff --git a/lib/librte_pmd_hyperv/Makefile b/lib/librte_pmd_hyperv/Makefile
new file mode 100644
index 0000000..4ba08c8
--- /dev/null
+++ b/lib/librte_pmd_hyperv/Makefile
@@ -0,0 +1,28 @@ 
+#   BSD LICENSE
+#
+#   Copyright(c) 2013-2015 Brocade Communications Systems, Inc.
+#   All rights reserved.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+#
+# library name
+#
+LIB = librte_pmd_hyperv.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_HV_PMD) += hyperv_ethdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_HV_PMD) += hyperv_rxtx.c
+SRCS-$(CONFIG_RTE_LIBRTE_HV_PMD) += hyperv_drv.c
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_HV_PMD) += lib/librte_eal lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_HV_PMD) += lib/librte_mempool lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_HV_PMD) += lib/librte_malloc
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_pmd_hyperv/hyperv.h b/lib/librte_pmd_hyperv/hyperv.h
new file mode 100644
index 0000000..b011b6d
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv.h
@@ -0,0 +1,169 @@ 
+/*-
+ * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
+ * All rights reserved.
+ */
+
+#ifndef _HYPERV_H_
+#define _HYPERV_H_
+
+#include <sys/param.h>
+#include <rte_log.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memzone.h>
+#include <rte_cycles.h>
+#include <rte_dev.h>
+
+#include "hyperv_logs.h"
+
+#define PAGE_SHIFT		12
+#define PAGE_SIZE		(1 << PAGE_SHIFT)
+
+/*
+ * Tunable ethdev params
+ */
+#define HV_MIN_RX_BUF_SIZE 1024
+#define HV_MAX_RX_PKT_LEN  4096
+#define HV_MAX_MAC_ADDRS   1
+#define HV_MAX_RX_QUEUES   1
+#define HV_MAX_TX_QUEUES   1
+#define HV_MAX_PKT_BURST   32
+#define HV_MAX_LINK_REQ    10
+
+/*
+ * List of resources mapped from kspace
+ * need to be the same as defined in hv_uio.c
+ */
+enum {
+	TXRX_RING_MAP,
+	INT_PAGE_MAP,
+	MON_PAGE_MAP,
+	RECV_BUF_MAP
+};
+
+/*
+ * Statistics
+ */
+struct hv_stats {
+	uint64_t opkts;
+	uint64_t obytes;
+	uint64_t oerrors;
+
+	uint64_t ipkts;
+	uint64_t ibytes;
+	uint64_t ierrors;
+	uint64_t rx_nombuf;
+};
+
+struct hv_data;
+struct netvsc_packet;
+struct rndis_msg;
+typedef void (*receive_callback_t)(struct hv_data *hv, struct rndis_msg *msg,
+		struct netvsc_packet *pkt);
+
+/*
+ * Main driver structure
+ */
+struct hv_data {
+	int vmbus_device;
+	uint8_t monitor_bit;
+	uint8_t monitor_group;
+	uint8_t kernel_initialized;
+	int uio_fd;
+	/* Flag indicates channel state. If closed, RX/TX shouldn't work further */
+	uint8_t closed;
+	/* Flag indicates whether HALT rndis request was received by host */
+	uint8_t hlt_req_sent;
+	/* Flag indicates pending state for HALT request */
+	uint8_t hlt_req_pending;
+	/* Counter for RNDIS requests */
+	uint32_t new_request_id;
+	/* State of RNDIS device */
+	uint8_t rndis_dev_state;
+	/* Number of transmitted packets but not completed yet by Hyper-V */
+	int num_outstanding_sends;
+	/* Max pkt len to fit in rx mbufs */
+	uint32_t max_rx_pkt_len;
+
+	uint8_t jumbo_frame_support;
+
+	struct hv_vmbus_ring_buffer *in;
+	struct hv_vmbus_ring_buffer *out;
+
+	/* Size of each ring_buffer(in/out) */
+	uint32_t rb_size;
+	/* Size of data in each ring_buffer(in/out) */
+	uint32_t rb_data_size;
+
+	void* int_page;
+	struct hv_vmbus_monitor_page *monitor_pages;
+	void* recv_interrupt_page;
+	void* send_interrupt_page;
+	void* ring_pages;
+	void* recv_buf;
+
+	uint8_t link_req_cnt;
+	uint32_t link_status;
+	uint8_t  hw_mac_addr[ETHER_ADDR_LEN];
+	struct rndis_request *req;
+	struct netvsc_packet *netvsc_packet;
+	struct nvsp_msg *rx_comp_msg;
+	struct hv_rx_queue *rxq;
+	struct hv_tx_queue *txq;
+	struct hv_vm_packet_descriptor *desc;
+	receive_callback_t receive_callback;
+	int pkt_rxed;
+
+	uint32_t debug;
+	struct hv_stats stats;
+};
+
+/*
+ * Extern functions declarations
+ */
+int hyperv_dev_tx_queue_setup(struct rte_eth_dev *dev,
+			 uint16_t queue_idx,
+			 uint16_t nb_desc,
+			 unsigned int socket_id,
+			 const struct rte_eth_txconf *tx_conf);
+
+void hyperv_dev_tx_queue_release(void *ptxq);
+
+int hyperv_dev_rx_queue_setup(struct rte_eth_dev *dev,
+			 uint16_t queue_idx,
+			 uint16_t nb_desc,
+			 unsigned int socket_id,
+			 const struct rte_eth_rxconf *rx_conf,
+			 struct rte_mempool *mp);
+
+void hyperv_dev_rx_queue_release(void *prxq);
+
+uint16_t
+hyperv_recv_pkts(void *prxq,
+		 struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+
+uint16_t
+hyperv_xmit_pkts(void *ptxq,
+		 struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
+
+int hv_rf_on_device_add(struct hv_data *hv);
+int hv_rf_on_device_remove(struct hv_data *hv);
+int hv_rf_on_send(struct hv_data *hv, struct netvsc_packet *pkt);
+int hv_rf_on_open(struct hv_data *hv);
+int hv_rf_on_close(struct hv_data *hv);
+int hv_rf_set_device_mac(struct hv_data *hv, uint8_t *mac);
+void hyperv_start_rx(struct hv_data *hv);
+void hyperv_stop_rx(struct hv_data *hv);
+int hyperv_get_buffer(struct hv_data *hv, void* buffer, uint32_t bufferlen);
+void hyperv_scan_comps(struct hv_data *hv, int allow_rx_drop);
+uint8_t hyperv_get_link_status(struct hv_data *hv);
+int hyperv_set_rx_mode(struct hv_data *hv, uint8_t promisc, uint8_t mcast);
+
+inline int rte_hv_dev_atomic_write_link_status(struct rte_eth_dev *dev,
+		struct rte_eth_link *link);
+inline int rte_hv_dev_atomic_read_link_status(struct rte_eth_dev *dev,
+		struct rte_eth_link *link);
+
+#endif /* _HYPERV_H_ */
diff --git a/lib/librte_pmd_hyperv/hyperv_drv.c b/lib/librte_pmd_hyperv/hyperv_drv.c
new file mode 100644
index 0000000..4ff2efa
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_drv.c
@@ -0,0 +1,1660 @@ 
+/*-
+ * Copyright (c) 2009-2012 Microsoft Corp.
+ * Copyright (c) 2010-2012 Citrix Inc.
+ * Copyright (c) 2012 NetApp Inc.
+ * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "hyperv.h"
+#include "hyperv_drv.h"
+#include "hyperv_rxtx.h"
+
+#define LOOP_CNT 10000
+#define MAC_STRLEN 14
+#define MAC_PARAM_STR "NetworkAddress"
+
+#define hex "0123456789abcdef"
+#define high(x) hex[(x & 0xf0) >> 4]
+#define low(x) hex[x & 0x0f]
+
+static int hv_rf_on_receive(struct hv_data *hv, struct netvsc_packet *pkt);
+
+/*
+ * Ring buffer
+ */
+
+/* Amount of space to write to */
+#define HV_BYTES_AVAIL_TO_WRITE(r, w, z) \
+	(((w) >= (r)) ? ((z) - ((w) - (r))) : ((r) - (w)))
+
+/*
+ * Get number of bytes available to read and to write to
+ * for the specified ring buffer
+ */
+static inline void
+get_ring_buffer_avail_bytes(
+	struct hv_data               *hv,
+	struct hv_vmbus_ring_buffer  *ring_buffer,
+	uint32_t                     *read,
+	uint32_t                     *write)
+{
+	rte_compiler_barrier();
+
+	/*
+	 * Capture the read/write indices before they changed
+	 */
+	uint32_t read_loc = ring_buffer->read_index;
+	uint32_t write_loc = ring_buffer->write_index;
+
+	*write = HV_BYTES_AVAIL_TO_WRITE(
+			read_loc, write_loc, hv->rb_data_size);
+	*read = hv->rb_data_size - *write;
+}
+
+/*
+ * Helper routine to copy from source to ring buffer.
+ *
+ * Assume there is enough room. Handles wrap-around in dest case only!
+ */
+static uint32_t
+copy_to_ring_buffer(
+	struct hv_vmbus_ring_buffer  *ring_buffer,
+	uint32_t                     ring_buffer_size,
+	uint32_t                     start_write_offset,
+	char                         *src,
+	uint32_t                     src_len)
+{
+	char *ring_buf = (char *)ring_buffer->buffer;
+	uint32_t fragLen;
+
+	if (src_len > ring_buffer_size - start_write_offset)  {
+		/* wrap-around detected! */
+		fragLen = ring_buffer_size - start_write_offset;
+		rte_memcpy(ring_buf + start_write_offset, src, fragLen);
+		rte_memcpy(ring_buf, src + fragLen, src_len - fragLen);
+	} else {
+		rte_memcpy(ring_buf + start_write_offset, src, src_len);
+	}
+
+	start_write_offset += src_len;
+	start_write_offset %= ring_buffer_size;
+
+	return start_write_offset;
+}
+
+/*
+ * Helper routine to copy to dest from ring buffer.
+ *
+ * Assume there is enough room. Handles wrap-around in src case only!
+ */
+static uint32_t
+copy_from_ring_buffer(
+	struct hv_data               *hv,
+	struct hv_vmbus_ring_buffer  *ring_buffer,
+	char                         *dest,
+	uint32_t                     dest_len,
+	uint32_t                     start_read_offset)
+{
+	uint32_t fragLen;
+	char *ring_buf = (char *)ring_buffer->buffer;
+
+	if (dest_len > hv->rb_data_size - start_read_offset) {
+		/*  wrap-around detected at the src */
+		fragLen = hv->rb_data_size - start_read_offset;
+		rte_memcpy(dest, ring_buf + start_read_offset, fragLen);
+		rte_memcpy(dest + fragLen, ring_buf, dest_len - fragLen);
+	} else {
+		rte_memcpy(dest, ring_buf + start_read_offset, dest_len);
+	}
+
+	start_read_offset += dest_len;
+	start_read_offset %= hv->rb_data_size;
+
+	return start_read_offset;
+}
+
+/*
+ * Write to the ring buffer.
+ */
+static int
+hv_ring_buffer_write(
+	struct hv_data                 *hv,
+	struct hv_vmbus_sg_buffer_list sg_buffers[],
+	uint32_t                       sg_buffer_count)
+{
+	struct hv_vmbus_ring_buffer *ring_buffer = hv->out;
+	uint32_t i = 0;
+	uint32_t byte_avail_to_write;
+	uint32_t byte_avail_to_read;
+	uint32_t total_bytes_to_write = 0;
+	volatile uint32_t next_write_location;
+	uint64_t prev_indices = 0;
+
+	for (i = 0; i < sg_buffer_count; i++)
+		total_bytes_to_write += sg_buffers[i].length;
+
+	total_bytes_to_write += sizeof(uint64_t);
+
+	get_ring_buffer_avail_bytes(hv, ring_buffer, &byte_avail_to_read,
+			&byte_avail_to_write);
+
+	/*
+	 * If there is only room for the packet, assume it is full.
+	 * Otherwise, the next time around, we think the ring buffer
+	 * is empty since the read index == write index
+	 */
+	if (byte_avail_to_write <= total_bytes_to_write) {
+		PMD_PERROR_LOG(hv, DBG_RB,
+				"byte_avail_to_write = %u, total_bytes_to_write = %u",
+				byte_avail_to_write, total_bytes_to_write);
+		return -EAGAIN;
+	}
+
+	/*
+	 * Write to the ring buffer
+	 */
+	next_write_location = ring_buffer->write_index;
+
+	for (i = 0; i < sg_buffer_count; i++) {
+		next_write_location = copy_to_ring_buffer(ring_buffer,
+				hv->rb_data_size, next_write_location,
+				(char *) sg_buffers[i].data, sg_buffers[i].length);
+	}
+
+	/*
+	 * Set previous packet start
+	 */
+	prev_indices = (uint64_t)ring_buffer->write_index << 32;
+
+	next_write_location = copy_to_ring_buffer(
+			ring_buffer, hv->rb_data_size, next_write_location,
+			(char *) &prev_indices, sizeof(uint64_t));
+
+	/*
+	 * Make sure we flush all writes before updating the writeIndex
+	 */
+	rte_compiler_barrier();
+
+	/*
+	 * Now, update the write location
+	 */
+	ring_buffer->write_index = next_write_location;
+
+	return 0;
+}
+
+/*
+ * Read without advancing the read index.
+ */
+static int
+hv_ring_buffer_peek(
+	struct hv_data  *hv,
+	void*           buffer,
+	uint32_t        buffer_len)
+{
+	struct hv_vmbus_ring_buffer *ring_buffer = hv->in;
+	uint32_t bytesAvailToWrite;
+	uint32_t bytesAvailToRead;
+
+	get_ring_buffer_avail_bytes(hv, ring_buffer,
+			&bytesAvailToRead,
+			&bytesAvailToWrite);
+
+	/* Make sure there is something to read */
+	if (bytesAvailToRead < buffer_len)
+		return -EAGAIN;
+
+	copy_from_ring_buffer(
+		hv, ring_buffer,
+		(char *)buffer, buffer_len, ring_buffer->read_index);
+
+	return 0;
+}
+
+/*
+ * Read and advance the read index.
+ */
+static int
+hv_ring_buffer_read(
+	struct hv_data  *hv,
+	void*           buffer,
+	uint32_t        buffer_len,
+	uint32_t        offset)
+{
+	struct hv_vmbus_ring_buffer *ring_buffer = hv->in;
+	uint32_t bytes_avail_to_write;
+	uint32_t bytes_avail_to_read;
+	uint32_t next_read_location = 0;
+	uint64_t prev_indices = 0;
+
+	if (buffer_len <= 0)
+		return -EINVAL;
+
+	get_ring_buffer_avail_bytes(
+			hv,
+			ring_buffer,
+			&bytes_avail_to_read,
+			&bytes_avail_to_write);
+
+	/*
+	 * Make sure there is something to read
+	 */
+	if (bytes_avail_to_read < buffer_len) {
+		PMD_PERROR_LOG(hv, DBG_RB, "bytes_avail_to_read = %u, buffer_len = %u",
+				bytes_avail_to_read, buffer_len);
+		return -EAGAIN;
+	}
+
+	next_read_location = (ring_buffer->read_index + offset) % hv->rb_data_size;
+
+	next_read_location = copy_from_ring_buffer(
+			hv,
+			ring_buffer,
+			(char *) buffer,
+			buffer_len,
+			next_read_location);
+
+	next_read_location = copy_from_ring_buffer(
+			hv,
+			ring_buffer,
+			(char *) &prev_indices,
+			sizeof(uint64_t),
+			next_read_location);
+
+	/*
+	 * Make sure all reads are done before we update the read index since
+	 * the writer may start writing to the read area once the read index
+	 * is updated.
+	 */
+	rte_compiler_barrier();
+
+	/*
+	 * Update the read index
+	 */
+	ring_buffer->read_index = next_read_location;
+
+	return 0;
+}
+
+/*
+ * VMBus
+ */
+
+/*
+ * Retrieve the raw packet on the specified channel
+ */
+static int
+hv_vmbus_channel_recv_packet_raw(
+	struct hv_data  *hv,
+	void*           buffer,
+	uint32_t        buffer_len,
+	uint32_t        *buffer_actual_len,
+	uint64_t        *request_id,
+	int             mode)
+{
+	int ret;
+	uint32_t packetLen;
+	struct hv_vm_packet_descriptor desc;
+
+	*buffer_actual_len = 0;
+	*request_id = 0;
+
+	ret = hv_ring_buffer_peek(hv, &desc,
+			sizeof(struct hv_vm_packet_descriptor));
+
+	if (ret != 0)
+		return 0;
+
+	if ((desc.type == HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES
+				&& !(mode & 1)) ||
+			((desc.type == HV_VMBUS_PACKET_TYPE_COMPLETION) && !(mode & 2))) {
+		return -1;
+	}
+
+	packetLen = desc.length8 << 3;
+
+	*buffer_actual_len = packetLen;
+
+	if (unlikely(packetLen > buffer_len)) {
+		PMD_PERROR_LOG(hv, DBG_RX, "The buffer desc is too big, will drop it");
+		return -ENOMEM;
+	}
+
+	*request_id = desc.transaction_id;
+
+	/* Copy over the entire packet to the user buffer */
+	ret = hv_ring_buffer_read(hv, buffer, packetLen, 0);
+
+	return 0;
+}
+
+/*
+ * Trigger an event notification on the specified channel
+ */
+static void
+vmbus_channel_set_event(struct hv_data *hv)
+{
+	/* Here we assume that channel->offer_msg.monitor_allocated == 1,
+	 * in another case our driver will not work */
+	/* Each uint32_t represents 32 channels */
+	__sync_or_and_fetch(((uint32_t *)hv->send_interrupt_page
+		+ ((hv->vmbus_device >> 5))), 1 << (hv->vmbus_device & 31)
+	);
+	__sync_or_and_fetch((uint32_t *)&hv->monitor_pages->
+			trigger_group[hv->monitor_group].u.pending, 1 << hv->monitor_bit);
+}
+
+/**
+ * @brief Send the specified buffer on the given channel
+ */
+static int
+hv_vmbus_channel_send_packet(
+	struct hv_data          *hv,
+	void*                   buffer,
+	uint32_t                buffer_len,
+	uint64_t                request_id,
+	enum hv_vmbus_packet_type    type,
+	uint32_t                flags)
+{
+	struct hv_vmbus_sg_buffer_list buffer_list[3];
+	struct hv_vm_packet_descriptor desc;
+	uint32_t packet_len_aligned;
+	uint64_t aligned_data;
+	uint32_t packet_len;
+	int ret = 0;
+	uint32_t old_write = hv->out->write_index;
+
+	packet_len = sizeof(struct hv_vm_packet_descriptor) + buffer_len;
+	packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t));
+	aligned_data = 0;
+
+	/* Setup the descriptor */
+	desc.type = type;   /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND;             */
+	desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */
+	/* in 8-bytes granularity */
+	desc.data_offset8 = sizeof(struct hv_vm_packet_descriptor) >> 3;
+	desc.length8 = (uint16_t) (packet_len_aligned >> 3);
+	desc.transaction_id = request_id;
+
+	buffer_list[0].data = &desc;
+	buffer_list[0].length = sizeof(struct hv_vm_packet_descriptor);
+
+	buffer_list[1].data = buffer;
+	buffer_list[1].length = buffer_len;
+
+	buffer_list[2].data = &aligned_data;
+	buffer_list[2].length = packet_len_aligned - packet_len;
+
+	ret = hv_ring_buffer_write(hv, buffer_list, 3);
+
+	rte_mb();
+	if (!ret && !hv->out->interrupt_mask && hv->out->read_index == old_write)
+		vmbus_channel_set_event(hv);
+
+	return ret;
+}
+
+/*
+ * Send a range of single-page buffer packets using
+ * a GPADL Direct packet type
+ */
+static int
+hv_vmbus_channel_send_packet_pagebuffer(
+	struct hv_data  *hv,
+	struct hv_vmbus_page_buffer	page_buffers[],
+	uint32_t		page_count,
+	void*			buffer,
+	uint32_t		buffer_len,
+	uint64_t		request_id)
+{
+
+	int ret = 0;
+	uint32_t packet_len, packetLen_aligned, descSize, i = 0;
+	struct hv_vmbus_sg_buffer_list buffer_list[3];
+	struct hv_vmbus_channel_packet_page_buffer desc;
+	uint64_t alignedData = 0;
+	uint32_t old_write = hv->out->write_index;
+
+	if (page_count > HV_MAX_PAGE_BUFFER_COUNT) {
+		PMD_PERROR_LOG(hv, DBG_VMBUS, "page_count %u goes out of the limit",
+				page_count);
+		return -EINVAL;
+	}
+
+	/*
+	 * Adjust the size down since hv_vmbus_channel_packet_page_buffer
+	 * is the largest size we support
+	 */
+	descSize = sizeof(struct hv_vmbus_channel_packet_page_buffer) -
+		((HV_MAX_PAGE_BUFFER_COUNT - page_count) *
+		 sizeof(struct hv_vmbus_page_buffer));
+	packet_len = descSize + buffer_len;
+	packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t));
+
+	/* Setup the descriptor */
+	desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT;
+	desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
+	desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */
+	desc.length8 = (uint16_t) (packetLen_aligned >> 3);
+	desc.transaction_id = request_id;
+	desc.range_count = page_count;
+
+	for (i = 0; i < page_count; i++) {
+		desc.range[i].length = page_buffers[i].length;
+		desc.range[i].offset = page_buffers[i].offset;
+		desc.range[i].pfn = page_buffers[i].pfn;
+	}
+
+	buffer_list[0].data = &desc;
+	buffer_list[0].length = descSize;
+
+	buffer_list[1].data = buffer;
+	buffer_list[1].length = buffer_len;
+
+	buffer_list[2].data = &alignedData;
+	buffer_list[2].length = packetLen_aligned - packet_len;
+
+	ret = hv_ring_buffer_write(hv, buffer_list, 3);
+	if (likely(ret == 0))
+		++hv->num_outstanding_sends;
+
+	rte_mb();
+	if (!ret && !hv->out->interrupt_mask &&
+			hv->out->read_index == old_write)
+		vmbus_channel_set_event(hv);
+
+	return ret;
+}
+
+/*
+ * NetVSC
+ */
+
+/*
+ * Net VSC on send
+ * Sends a packet on the specified Hyper-V device.
+ * Returns 0 on success, non-zero on failure.
+ */
+static int
+hv_nv_on_send(struct hv_data *hv, struct netvsc_packet *pkt)
+{
+	struct nvsp_msg send_msg;
+	int ret;
+
+	send_msg.msg_type = nvsp_msg_1_type_send_rndis_pkt;
+	if (pkt->is_data_pkt) {
+		/* 0 is RMC_DATA */
+		send_msg.msgs.send_rndis_pkt.chan_type = 0;
+	} else {
+		/* 1 is RMC_CONTROL */
+		send_msg.msgs.send_rndis_pkt.chan_type = 1;
+	}
+
+	/* Not using send buffer section */
+	send_msg.msgs.send_rndis_pkt.send_buf_section_idx =
+	    0xFFFFFFFF;
+	send_msg.msgs.send_rndis_pkt.send_buf_section_size = 0;
+
+	if (likely(pkt->page_buf_count)) {
+		ret = hv_vmbus_channel_send_packet_pagebuffer(hv,
+				pkt->page_buffers, pkt->page_buf_count,
+				&send_msg, sizeof(struct nvsp_msg),
+				(uint64_t)pkt->is_data_pkt ? (hv->txq->tx_tail + 1) : 0);
+	} else {
+		PMD_PERROR_LOG(hv, DBG_TX, "pkt->page_buf_count value can't be zero");
+		ret = -1;
+	}
+
+	return ret;
+}
+
+/*
+ * Net VSC on receive
+ *
+ * This function deals exclusively with virtual addresses.
+ */
+static void
+hv_nv_on_receive(struct hv_data *hv, struct hv_vm_packet_descriptor *pkt)
+{
+	struct hv_vm_transfer_page_packet_header *vm_xfer_page_pkt;
+	struct nvsp_msg *nvsp_msg_pkt;
+	struct netvsc_packet *net_vsc_pkt = NULL;
+	unsigned long start;
+	int count, i;
+
+	nvsp_msg_pkt = (struct nvsp_msg *)((unsigned long)pkt
+			+ (pkt->data_offset8 << 3));
+
+	/* Make sure this is a valid nvsp packet */
+	if (unlikely(nvsp_msg_pkt->msg_type != nvsp_msg_1_type_send_rndis_pkt)) {
+		PMD_PERROR_LOG(hv, DBG_RX, "NVSP packet is not valid");
+		return;
+	}
+
+	vm_xfer_page_pkt = (struct hv_vm_transfer_page_packet_header *)pkt;
+
+	if (unlikely(vm_xfer_page_pkt->transfer_page_set_id
+			!= NETVSC_RECEIVE_BUFFER_ID)) {
+		PMD_PERROR_LOG(hv, DBG_RX, "transfer_page_set_id is not valid");
+		return;
+	}
+
+	count = vm_xfer_page_pkt->range_count;
+
+	/*
+	 * Initialize the netvsc packet
+	 */
+	for (i = 0; i < count; ++i) {
+		net_vsc_pkt = hv->netvsc_packet;
+
+		net_vsc_pkt->tot_data_buf_len =
+			vm_xfer_page_pkt->ranges[i].byte_count;
+		net_vsc_pkt->page_buf_count = 1;
+
+		net_vsc_pkt->page_buffers[0].length =
+			vm_xfer_page_pkt->ranges[i].byte_count;
+
+		/* The virtual address of the packet in the receive buffer */
+		start = ((unsigned long)hv->recv_buf +
+				vm_xfer_page_pkt->ranges[i].byte_offset);
+
+		/* Page number of the virtual page containing packet start */
+		net_vsc_pkt->page_buffers[0].pfn = start >> PAGE_SHIFT;
+
+		/* Calculate the page relative offset */
+		net_vsc_pkt->page_buffers[0].offset =
+			vm_xfer_page_pkt->ranges[i].byte_offset & (PAGE_SIZE - 1);
+
+		/*
+		 * In this implementation, we are dealing with virtual
+		 * addresses exclusively.  Since we aren't using physical
+		 * addresses at all, we don't care if a packet crosses a
+		 * page boundary.  For this reason, the original code to
+		 * check for and handle page crossings has been removed.
+		 */
+
+		/*
+		 * Pass it to the upper layer.  The receive completion call
+		 * has been moved into this function.
+		 */
+		hv_rf_on_receive(hv, net_vsc_pkt);
+	}
+	/* Send a receive completion packet to RNDIS device (ie NetVsp) */
+	hv_vmbus_channel_send_packet(hv, hv->rx_comp_msg, sizeof(struct nvsp_msg),
+			vm_xfer_page_pkt->d.transaction_id,
+			HV_VMBUS_PACKET_TYPE_COMPLETION, 0);
+}
+
+/*
+ * Net VSC on send completion
+ */
+static void
+hv_nv_on_send_completion(struct hv_data *hv, struct hv_vm_packet_descriptor *pkt)
+{
+	struct nvsp_msg *nvsp_msg_pkt;
+
+	nvsp_msg_pkt =
+	    (struct nvsp_msg *)((unsigned long)pkt + (pkt->data_offset8 << 3));
+
+	if (likely(nvsp_msg_pkt->msg_type ==
+				nvsp_msg_1_type_send_rndis_pkt_complete)) {
+
+		if (unlikely(hv->hlt_req_pending))
+			hv->hlt_req_sent = 1;
+		else
+			if (pkt->transaction_id)
+				++hv->txq->tx_free;
+		--hv->num_outstanding_sends;
+		return;
+	}
+	PMD_PINFO_LOG(hv, DBG_TX, "unhandled completion (for kernel req or so)");
+}
+
+/*
+ * Analogue of bsd hv_nv_on_channel_callback
+ */
+static void
+hv_nv_complete_request(struct hv_data *hv, struct rndis_request *request)
+{
+	uint32_t bytes_rxed, cnt = 0;
+	uint64_t request_id;
+	struct hv_vm_packet_descriptor *desc;
+	uint8_t *buffer;
+	int     bufferlen = NETVSC_PACKET_SIZE;
+	int     ret = 0;
+
+	PMD_INIT_FUNC_TRACE();
+
+	hv->req = request;
+
+	buffer = rte_malloc(NULL, bufferlen, RTE_CACHE_LINE_SIZE);
+	if (!buffer) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "failed to allocate packet");
+		return;
+	}
+
+	do {
+		rte_delay_us(1);
+		ret = hv_vmbus_channel_recv_packet_raw(hv,
+				buffer, bufferlen, &bytes_rxed, &request_id, 3);
+		if (ret == 0) {
+			if (bytes_rxed > 0) {
+				desc = (struct hv_vm_packet_descriptor *)buffer;
+
+				switch (desc->type) {
+				case HV_VMBUS_PACKET_TYPE_COMPLETION:
+					hv_nv_on_send_completion(hv, desc);
+					break;
+				case HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES:
+					hv_nv_on_receive(hv, desc);
+					break;
+				default:
+					break;
+				}
+				PMD_PDEBUG_LOG(hv, DBG_LOAD, "Did %d attempts"
+						" until non-empty data was"
+						" receieved", cnt);
+				cnt = 0;
+			} else {
+				cnt++;
+			}
+		} else if (ret == -ENOMEM) {
+			/* Handle large packet */
+			PMD_PDEBUG_LOG(hv, DBG_LOAD, "recv_packet_raw returned -ENOMEM");
+			rte_free(buffer);
+			buffer = rte_malloc(NULL, bytes_rxed, RTE_CACHE_LINE_SIZE);
+			if (buffer == NULL) {
+				PMD_PERROR_LOG(hv, DBG_LOAD, "failed to allocate buffer");
+				break;
+			}
+			bufferlen = bytes_rxed;
+		} else {
+			PMD_PERROR_LOG(hv, DBG_LOAD, "Unexpected return code (%d)", ret);
+		}
+		if (!hv->req) {
+			PMD_PINFO_LOG(hv, DBG_LOAD, "Single request processed");
+			break;
+		}
+		if (cnt >= LOOP_CNT) {
+			PMD_PERROR_LOG(hv, DBG_LOAD, "Emergency break from the loop");
+			break;
+		}
+		if (hv->hlt_req_sent) {
+			PMD_PINFO_LOG(hv, DBG_LOAD, "Halt request processed");
+			break;
+		}
+		/* The field hv->req->response_msg.ndis_msg_type
+		 * should be set to non-zero value when response received
+		 */
+	} while (!hv->req->response_msg.ndis_msg_type);
+
+	rte_free(buffer);
+}
+
+/*
+ * RNDIS
+ */
+
+/*
+ * Create new RNDIS request
+ */
+static inline struct rndis_request *
+hv_rndis_request(struct hv_data *hv, uint32_t message_type,
+		uint32_t message_length)
+{
+	struct rndis_request *request;
+	struct rndis_msg *rndis_mesg;
+	struct rndis_set_request *set;
+	char mz_name[RTE_MEMZONE_NAMESIZE];
+	uint32_t size;
+
+	PMD_INIT_FUNC_TRACE();
+
+	request = rte_zmalloc("rndis_req", sizeof(struct rndis_request),
+			      RTE_CACHE_LINE_SIZE);
+
+	if (!request)
+		return NULL;
+
+	sprintf(mz_name, "hv_%d_%u_%d_%p", hv->vmbus_device, message_type,
+			hv->new_request_id, request);
+
+	size = MAX(message_length, sizeof(struct rndis_msg));
+
+	request->request_msg_memzone = rte_memzone_reserve_aligned(mz_name,
+			size, rte_lcore_to_socket_id(rte_lcore_id()), 0, PAGE_SIZE);
+	if (!request->request_msg_memzone) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "memzone_reserve failed");
+		rte_free(request);
+		return NULL;
+	}
+	request->request_msg = request->request_msg_memzone->addr;
+	rndis_mesg = request->request_msg;
+	rndis_mesg->ndis_msg_type = message_type;
+	rndis_mesg->msg_len = message_length;
+
+	/*
+	 * Set the request id. This field is always after the rndis header
+	 * for request/response packet types so we just use the set_request
+	 * as a template.
+	 */
+	set = &rndis_mesg->msg.set_request;
+	hv->new_request_id++;
+	set->request_id = hv->new_request_id;
+
+	return request;
+}
+
+/*
+ * RNDIS filter
+ */
+
+static void
+hv_rf_receive_response(
+	struct hv_data       *hv,
+	struct rndis_msg     *response)
+{
+	struct rndis_request *request = hv->req;
+	PMD_INIT_FUNC_TRACE();
+
+	if (response->msg_len <= sizeof(struct rndis_msg)) {
+		rte_memcpy(&request->response_msg, response,
+				response->msg_len);
+	} else {
+		if (response->ndis_msg_type == REMOTE_NDIS_INITIALIZE_CMPLT) {
+			request->response_msg.msg.init_complete.status =
+				STATUS_BUFFER_OVERFLOW;
+		}
+		PMD_PERROR_LOG(hv, DBG_LOAD, "response buffer overflow\n");
+	}
+}
+
+/*
+ * RNDIS filter receive indicate status
+ */
+static void
+hv_rf_receive_indicate_status(struct hv_data *hv, struct rndis_msg *response)
+{
+	struct rndis_indicate_status *indicate = &response->msg.indicate_status;
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT)
+		hv->link_status = 1;
+	else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT)
+		hv->link_status = 0;
+	else if (indicate->status == RNDIS_STATUS_INVALID_DATA)
+		PMD_PERROR_LOG(hv, DBG_RX, "Invalid data in RNDIS message");
+	else
+		PMD_PERROR_LOG(hv, DBG_RX, "Unsupported status: %u", indicate->status);
+}
+
+/*
+ * RNDIS filter receive data
+ */
+static void
+hv_rf_receive_data(struct hv_data *hv, struct rndis_msg *msg,
+		struct netvsc_packet *pkt)
+{
+	struct rte_mbuf *m_new;
+	struct hv_rx_queue *rxq = hv->rxq;
+	struct rndis_packet *rndis_pkt;
+	uint32_t data_offset;
+
+	if (unlikely(hv->closed))
+		return;
+
+	rndis_pkt = &msg->msg.packet;
+
+	if (unlikely(hv->max_rx_pkt_len < rndis_pkt->data_length)) {
+		PMD_PWARN_LOG(hv, DBG_RX, "Packet is too large (%db), dropping.",
+				rndis_pkt->data_length);
+		++hv->stats.ierrors;
+		return;
+	}
+
+	/* Remove rndis header, then pass data packet up the stack */
+	data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
+
+	/* L2 frame length, with L2 header, not including CRC */
+	pkt->tot_data_buf_len        = rndis_pkt->data_length;
+	pkt->page_buffers[0].offset += data_offset;
+	/* Buffer length now L2 frame length plus trailing junk */
+	pkt->page_buffers[0].length -= data_offset;
+
+	pkt->vlan_tci = 0;
+
+	/*
+	 * Just put data into appropriate mbuf, all further work will be done
+	 * by the upper layer (mbuf replacement, index adjustment, etc)
+	 */
+	m_new = rxq->sw_ring[rxq->rx_tail];
+	if (++rxq->rx_tail == rxq->nb_rx_desc)
+		rxq->rx_tail = 0;
+
+	/*
+	 * Copy the received packet to mbuf.
+	 * The copy is required since the memory pointed to by netvsc_packet
+	 * cannot be reallocated
+	 */
+	uint8_t *vaddr = (uint8_t *)
+		(pkt->page_buffers[0].pfn << PAGE_SHIFT)
+		+ pkt->page_buffers[0].offset;
+
+	m_new->nb_segs = 1;
+	m_new->pkt_len = m_new->data_len = pkt->tot_data_buf_len;
+	rte_memcpy(rte_pktmbuf_mtod(m_new, void *), vaddr, m_new->data_len);
+
+	if (pkt->vlan_tci) {
+		m_new->vlan_tci = pkt->vlan_tci;
+		m_new->ol_flags |= PKT_RX_VLAN_PKT;
+	}
+
+	hv->pkt_rxed = 1;
+}
+
+/*
+ * RNDIS filter receive data, jumbo frames support
+ */
+static void
+hv_rf_receive_data_sg(struct hv_data *hv, struct rndis_msg *msg,
+		struct netvsc_packet *pkt)
+{
+	struct rte_mbuf *m_new;
+	struct hv_rx_queue *rxq = hv->rxq;
+	struct rndis_packet *rndis_pkt;
+	uint32_t data_offset;
+
+	if (unlikely(hv->closed))
+		return;
+
+	rndis_pkt = &msg->msg.packet;
+
+	/* Remove rndis header, then pass data packet up the stack */
+	data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
+
+	/* L2 frame length, with L2 header, not including CRC */
+	pkt->tot_data_buf_len        = rndis_pkt->data_length;
+	pkt->page_buffers[0].offset += data_offset;
+	/* Buffer length now L2 frame length plus trailing junk */
+	pkt->page_buffers[0].length -= data_offset;
+
+	pkt->vlan_tci = 0;
+
+	/*
+	 * Just put data into appropriate mbuf, all further work will be done
+	 * by the upper layer (mbuf replacement, index adjustment, etc)
+	 */
+	m_new = rxq->sw_ring[rxq->rx_tail];
+	if (++rxq->rx_tail == rxq->nb_rx_desc)
+		rxq->rx_tail = 0;
+
+	/*
+	 * Copy the received packet to mbuf.
+	 * The copy is required since the memory pointed to by netvsc_packet
+	 * cannot be reallocated
+	 */
+	uint8_t *vaddr = (uint8_t *)
+		(pkt->page_buffers[0].pfn << PAGE_SHIFT)
+		+ pkt->page_buffers[0].offset;
+
+	/* Scatter-gather emulation */
+	uint32_t carry_len = pkt->tot_data_buf_len;
+	struct rte_mbuf *m_next;
+	m_new->pkt_len = carry_len;
+	m_new->nb_segs = (carry_len - 1) / hv->max_rx_pkt_len + 1;
+
+	while (1) {
+		m_new->data_len = MIN(carry_len, hv->max_rx_pkt_len);
+		rte_memcpy(rte_pktmbuf_mtod(m_new, void *),
+			   vaddr, m_new->data_len);
+		vaddr += m_new->data_len;
+	
+		if (carry_len <= hv->max_rx_pkt_len)
+			break;
+
+		carry_len -= hv->max_rx_pkt_len;
+		m_next = rxq->sw_ring[rxq->rx_tail];
+		if (++rxq->rx_tail == rxq->nb_rx_desc)
+			rxq->rx_tail = 0;
+		m_new->next = m_next;
+		m_new = m_next;
+	}
+
+	if (pkt->vlan_tci) {
+		m_new->vlan_tci = pkt->vlan_tci;
+		m_new->ol_flags |= PKT_RX_VLAN_PKT;
+	}
+
+	hv->pkt_rxed = 1;
+}
+
+static int
+hv_rf_send_request(struct hv_data *hv, struct rndis_request *request)
+{
+	struct netvsc_packet *packet;
+
+	PMD_INIT_FUNC_TRACE();
+	/* Set up the packet to send it */
+	packet = &request->pkt;
+
+	packet->is_data_pkt = 0;
+	packet->tot_data_buf_len = request->request_msg->msg_len;
+	packet->page_buf_count = 1;
+
+	packet->page_buffers[0].pfn =
+		(request->request_msg_memzone->phys_addr) >> PAGE_SHIFT;
+	packet->page_buffers[0].length = request->request_msg->msg_len;
+	packet->page_buffers[0].offset =
+	    (unsigned long)request->request_msg & (PAGE_SIZE - 1);
+
+	return hv_nv_on_send(hv, packet);
+}
+
+static void u8_to_u16(const char *src, int len, char *dst)
+{
+	int i;
+
+	for (i = 0; i < len; ++i) {
+		dst[2 * i] = src[i];
+		dst[2 * i + 1] = 0;
+	}
+}
+
+int
+hv_rf_set_device_mac(struct hv_data *hv, uint8_t *macaddr)
+{
+	struct rndis_request *request;
+	struct rndis_set_request *set_request;
+	struct rndis_config_parameter_info *info;
+	struct rndis_set_complete *set_complete;
+	char mac_str[2*ETHER_ADDR_LEN+1];
+	wchar_t *param_value, *param_name;
+	uint32_t status;
+	uint32_t message_len = sizeof(struct rndis_config_parameter_info) +
+		2 * MAC_STRLEN + 4 * ETHER_ADDR_LEN;
+	int ret, i;
+
+	request = hv_rndis_request(hv, REMOTE_NDIS_SET_MSG,
+		RNDIS_MESSAGE_SIZE(struct rndis_set_request) + message_len);
+	if (!request)
+		return -ENOMEM;
+
+	set_request = &request->request_msg->msg.set_request;
+	set_request->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
+	set_request->device_vc_handle = 0;
+	set_request->info_buffer_offset = sizeof(struct rndis_set_request);
+	set_request->info_buffer_length = message_len;
+
+	info = (struct rndis_config_parameter_info *)((ulong)set_request +
+		set_request->info_buffer_offset);
+	info->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
+	info->parameter_name_offset =
+		sizeof(struct rndis_config_parameter_info);
+	info->parameter_name_length = 2 * MAC_STRLEN;
+	info->parameter_value_offset =
+		info->parameter_name_offset + info->parameter_name_length;
+	/* Multiply by 2 because of string representation and by 2
+	 * because of utf16 representaion
+	 */
+	info->parameter_value_length = 4 * ETHER_ADDR_LEN;
+	param_name = (wchar_t *)((ulong)info + info->parameter_name_offset);
+	param_value = (wchar_t *)((ulong)info + info->parameter_value_offset);
+
+	u8_to_u16(MAC_PARAM_STR, MAC_STRLEN, (char *)param_name);
+	for (i = 0; i < ETHER_ADDR_LEN; ++i) {
+		mac_str[2*i] = high(macaddr[i]);
+		mac_str[2*i+1] = low(macaddr[i]);
+	}
+
+	u8_to_u16((const char *)mac_str, 2 * ETHER_ADDR_LEN, (char *)param_value);
+
+	ret = hv_rf_send_request(hv, request);
+	if (ret)
+		goto cleanup;
+
+	request->response_msg.msg.set_complete.status = 0xFFFF;
+	hv_nv_complete_request(hv, request);
+	set_complete = &request->response_msg.msg.set_complete;
+	if (set_complete->status == 0xFFFF) {
+		/* Host is not responding, we can't free request in this case */
+		ret = -1;
+		PMD_PERROR_LOG(hv, DBG_LOAD, "Host is not responding");
+		goto exit;
+	}
+	/* Response received, check status */
+	status = set_complete->status;
+	if (status) {
+		/* Bad response status, return error */
+		PMD_PERROR_LOG(hv, DBG_LOAD, "set_complete->status = %u\n", status);
+		ret = -EINVAL;
+	}
+
+cleanup:
+	rte_free(request);
+exit:
+	return ret;
+}
+
+/*
+ * RNDIS filter on receive
+ */
+static int
+hv_rf_on_receive(struct hv_data *hv, struct netvsc_packet *pkt)
+{
+	struct rndis_msg rndis_mesg;
+	struct rndis_msg *rndis_hdr;
+
+	/* Shift virtual page number to form virtual page address */
+	rndis_hdr = (struct rndis_msg *)(pkt->page_buffers[0].pfn << PAGE_SHIFT);
+
+	rndis_hdr = (void *)((unsigned long)rndis_hdr
+			+ pkt->page_buffers[0].offset);
+
+	/*
+	 * Make sure we got a valid rndis message
+	 * Fixme:  There seems to be a bug in set completion msg where
+	 * its msg_len is 16 bytes but the byte_count field in the
+	 * xfer page range shows 52 bytes
+	 */
+	if (unlikely(pkt->tot_data_buf_len != rndis_hdr->msg_len)) {
+		++hv->stats.ierrors;
+		PMD_PERROR_LOG(hv, DBG_RX, "invalid rndis message? (expected %u "
+		    "bytes got %u)... dropping this message",
+		    rndis_hdr->msg_len, pkt->tot_data_buf_len);
+		return -1;
+	}
+
+	rte_memcpy(&rndis_mesg, rndis_hdr,
+	    (rndis_hdr->msg_len > sizeof(struct rndis_msg)) ?
+	    sizeof(struct rndis_msg) : rndis_hdr->msg_len);
+
+	switch (rndis_mesg.ndis_msg_type) {
+
+	/* data message */
+	case REMOTE_NDIS_PACKET_MSG:
+		hv->receive_callback(hv, &rndis_mesg, pkt);
+		break;
+	/* completion messages */
+	case REMOTE_NDIS_INITIALIZE_CMPLT:
+	case REMOTE_NDIS_QUERY_CMPLT:
+	case REMOTE_NDIS_SET_CMPLT:
+	case REMOTE_NDIS_RESET_CMPLT:
+	case REMOTE_NDIS_KEEPALIVE_CMPLT:
+		hv_rf_receive_response(hv, &rndis_mesg);
+		break;
+	/* notification message */
+	case REMOTE_NDIS_INDICATE_STATUS_MSG:
+		hv_rf_receive_indicate_status(hv, &rndis_mesg);
+		break;
+	default:
+		PMD_PERROR_LOG(hv, DBG_RX, "hv_rf_on_receive():  Unknown msg_type 0x%x",
+		    rndis_mesg.ndis_msg_type);
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * RNDIS filter on send
+ */
+int
+hv_rf_on_send(struct hv_data *hv, struct netvsc_packet *pkt)
+{
+	struct rndis_msg *rndis_mesg;
+	struct rndis_packet *rndis_pkt;
+	uint32_t rndis_msg_size;
+
+	/* Add the rndis header */
+	rndis_mesg = (struct rndis_msg *)pkt->extension;
+
+	memset(rndis_mesg, 0, sizeof(struct rndis_msg));
+
+	rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
+
+	rndis_mesg->ndis_msg_type = REMOTE_NDIS_PACKET_MSG;
+	rndis_mesg->msg_len = pkt->tot_data_buf_len + rndis_msg_size;
+
+	rndis_pkt = &rndis_mesg->msg.packet;
+	rndis_pkt->data_offset = sizeof(struct rndis_packet);
+	rndis_pkt->data_length = pkt->tot_data_buf_len;
+
+	pkt->is_data_pkt = 1;
+
+	/*
+	 * Invoke netvsc send.  If return status is bad, the caller now
+	 * resets the context pointers before retrying.
+	 */
+	return hv_nv_on_send(hv, pkt);
+}
+
+static int
+hv_rf_init_device(struct hv_data *hv)
+{
+	struct rndis_request *request;
+	struct rndis_initialize_request *init;
+	struct rndis_initialize_complete *init_complete;
+	uint32_t status;
+	int ret;
+
+	PMD_INIT_FUNC_TRACE();
+
+	request = hv_rndis_request(hv, REMOTE_NDIS_INITIALIZE_MSG,
+	    RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
+	if (!request) {
+		ret = -1;
+		goto cleanup;
+	}
+
+	/* Set up the rndis set */
+	init = &request->request_msg->msg.init_request;
+	init->major_version = RNDIS_MAJOR_VERSION;
+	init->minor_version = RNDIS_MINOR_VERSION;
+	/*
+	 * Per the RNDIS document, this should be set to the max MTU
+	 * plus the header size.  However, 2048 works fine, so leaving
+	 * it as is.
+	 */
+	init->max_xfer_size = 2048;
+
+	hv->rndis_dev_state = RNDIS_DEV_INITIALIZING;
+
+	ret = hv_rf_send_request(hv, request);
+	if (ret != 0) {
+		hv->rndis_dev_state = RNDIS_DEV_UNINITIALIZED;
+		goto cleanup;
+	}
+
+	/* Putting -1 here to ensure that HyperV really answered us */
+	request->response_msg.msg.init_complete.status = -1;
+	hv_nv_complete_request(hv, request);
+
+	init_complete = &request->response_msg.msg.init_complete;
+	status = init_complete->status;
+	if (status == 0) {
+		PMD_PINFO_LOG(hv, DBG_LOAD, "Remote NDIS device is initialized");
+		hv->rndis_dev_state = RNDIS_DEV_INITIALIZED;
+		ret = 0;
+	} else {
+		PMD_PINFO_LOG(hv, DBG_LOAD, "Remote NDIS device left uninitialized");
+		hv->rndis_dev_state = RNDIS_DEV_UNINITIALIZED;
+		ret = -1;
+	}
+
+cleanup:
+	rte_free(request);
+
+	return ret;
+}
+
+/*
+ * RNDIS filter query device
+ */
+static int
+hv_rf_query_device(struct hv_data *hv, uint32_t oid, void* result,
+		   uint32_t result_size)
+{
+	struct rndis_request *request;
+	struct rndis_query_request *query;
+	struct rndis_query_complete *query_complete;
+	int ret = 0;
+
+	PMD_INIT_FUNC_TRACE();
+
+	request = hv_rndis_request(hv, REMOTE_NDIS_QUERY_MSG,
+	    RNDIS_MESSAGE_SIZE(struct rndis_query_request));
+	if (request == NULL) {
+		ret = -1;
+		goto cleanup;
+	}
+
+	/* Set up the rndis query */
+	query = &request->request_msg->msg.query_request;
+	query->oid = oid;
+	query->info_buffer_offset = sizeof(struct rndis_query_request);
+	query->info_buffer_length = 0;
+	query->device_vc_handle = 0;
+
+	ret = hv_rf_send_request(hv, request);
+	if (ret != 0) {
+		PMD_PERROR_LOG(hv, DBG_TX, "RNDISFILTER request failed to Send!");
+		goto cleanup;
+	}
+
+	hv_nv_complete_request(hv, request);
+
+	/* Copy the response back */
+	query_complete = &request->response_msg.msg.query_complete;
+
+	if (query_complete->info_buffer_length > result_size) {
+		ret = -EINVAL;
+		goto cleanup;
+	}
+
+	rte_memcpy(result, (void *)((unsigned long)query_complete +
+	    query_complete->info_buffer_offset),
+	    query_complete->info_buffer_length);
+
+cleanup:
+	rte_free(request);
+
+	return ret;
+}
+
+/*
+ * RNDIS filter query device MAC address
+ */
+static inline int
+hv_rf_query_device_mac(struct hv_data *hv)
+{
+	uint32_t size = HW_MACADDR_LEN;
+
+	int ret = hv_rf_query_device(hv, RNDIS_OID_802_3_PERMANENT_ADDRESS,
+			&hv->hw_mac_addr, size);
+	PMD_PDEBUG_LOG(hv, DBG_TX, "MAC: %02x:%02x:%02x:%02x:%02x:%02x, ret = %d",
+			hv->hw_mac_addr[0], hv->hw_mac_addr[1], hv->hw_mac_addr[2],
+			hv->hw_mac_addr[3], hv->hw_mac_addr[4], hv->hw_mac_addr[5],
+			ret);
+	return ret;
+}
+
+/*
+ * RNDIS filter query device link status
+ */
+static inline int
+hv_rf_query_device_link_status(struct hv_data *hv)
+{
+	uint32_t size = sizeof(uint32_t);
+	/* Set all bits to 1, it's to ensure that the response is actual */
+	uint32_t status = -1;
+
+	int ret = hv_rf_query_device(hv, RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
+			&status, size);
+	hv->link_status = status ? 0 : 1;
+	PMD_PDEBUG_LOG(hv, DBG_TX, "Link Status: %s",
+			hv->link_status ? "Up" : "Down");
+	return ret;
+}
+
+int
+hv_rf_on_device_add(struct hv_data *hv)
+{
+	int ret;
+
+	PMD_INIT_FUNC_TRACE();
+
+	hv->closed = 0;
+	hv->rb_data_size = hv->rb_size - sizeof(struct hv_vmbus_ring_buffer);
+	PMD_PDEBUG_LOG(hv, DBG_LOAD, "hv->rb_data_size = %u", hv->rb_data_size);
+
+	if (unlikely(hv->in->interrupt_mask == 0)) {
+		PMD_PINFO_LOG(hv, DBG_LOAD, "Disabling interrupts from host");
+		hv->in->interrupt_mask = 1;
+		rte_mb();
+	}
+
+	hv->netvsc_packet = rte_zmalloc("", sizeof(struct netvsc_packet),
+					RTE_CACHE_LINE_SIZE);
+	if (hv->netvsc_packet == NULL)
+		return -ENOMEM;
+	hv->netvsc_packet->is_data_pkt = 1;
+
+	hv->rx_comp_msg = rte_zmalloc("", sizeof(struct nvsp_msg),
+				      RTE_CACHE_LINE_SIZE);
+	if (hv->rx_comp_msg == NULL)
+		return -ENOMEM;
+
+	hv->rx_comp_msg->msg_type = nvsp_msg_1_type_send_rndis_pkt_complete;
+	hv->rx_comp_msg->msgs.send_rndis_pkt_complete.status =
+		nvsp_status_success;
+
+	memset(&hv->stats, 0, sizeof(struct hv_stats));
+
+	hv->receive_callback = hv_rf_receive_data;
+
+	/* It's for completion of requests which were sent from kernel-space part */
+	hv_nv_complete_request(hv, NULL);
+	hv_nv_complete_request(hv, NULL);
+
+	hv->rndis_dev_state = RNDIS_DEV_UNINITIALIZED;
+
+	/* Send the rndis initialization message */
+	ret = hv_rf_init_device(hv);
+	if (ret != 0) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "rndis init failed!");
+		hv_rf_on_device_remove(hv);
+		return ret;
+	}
+
+	/* Get the mac address */
+	ret = hv_rf_query_device_mac(hv);
+	if (ret != 0) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "rndis query mac failed!");
+		hv_rf_on_device_remove(hv);
+		return ret;
+	}
+
+	return ret;
+}
+
+#define HALT_COMPLETION_WAIT_COUNT      25
+
+/*
+ * RNDIS filter halt device
+ */
+static int
+hv_rf_halt_device(struct hv_data *hv)
+{
+	struct rndis_request *request;
+	struct rndis_halt_request *halt;
+	int i, ret;
+
+	PMD_INIT_FUNC_TRACE();
+
+	/* Attempt to do a rndis device halt */
+	request = hv_rndis_request(hv, REMOTE_NDIS_HALT_MSG,
+	    RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
+	if (!request) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "Unable to create RNDIS_HALT request");
+		return -1;
+	}
+
+	/* initialize "poor man's semaphore" */
+	hv->hlt_req_sent = 0;
+
+	/* Set up the rndis set */
+	halt = &request->request_msg->msg.halt_request;
+	hv->new_request_id++;
+	halt->request_id = hv->new_request_id;
+
+	ret = hv_rf_send_request(hv, request);
+	if (ret) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "Failed to send RNDIS_HALT request: %d",
+				ret);
+		return ret;
+	}
+
+	/*
+	 * Wait for halt response from halt callback.  We must wait for
+	 * the transaction response before freeing the request and other
+	 * resources.
+	 */
+	for (i = HALT_COMPLETION_WAIT_COUNT; i > 0; i--) {
+		hv_nv_complete_request(hv, request);
+		if (hv->hlt_req_sent != 0) {
+			PMD_PDEBUG_LOG(hv, DBG_LOAD, "Completed HALT request at %d try",
+					HALT_COMPLETION_WAIT_COUNT - i + 1);
+			break;
+		}
+	}
+	hv->hlt_req_sent = 0;
+	if (i == 0) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "RNDIS_HALT request was not completed!");
+		rte_free(request);
+		return -1;
+	}
+
+	hv->rndis_dev_state = RNDIS_DEV_UNINITIALIZED;
+
+	rte_free(request);
+
+	return 0;
+}
+
+#define HV_TX_DRAIN_TRIES 50
+static inline int
+hyperv_tx_drain(struct hv_data *hv)
+{
+	int i = HV_TX_DRAIN_TRIES;
+
+	PMD_PDEBUG_LOG(hv, DBG_LOAD, "Waiting for TXs to be completed...");
+	while (hv->num_outstanding_sends > 0 && --i) {
+		hv_nv_complete_request(hv, NULL);
+		rte_delay_ms(100);
+	}
+
+	return hv->num_outstanding_sends;
+}
+
+/*
+ * RNDIS filter on device remove
+ */
+int
+hv_rf_on_device_remove(struct hv_data *hv)
+{
+	int ret;
+
+	PMD_INIT_FUNC_TRACE();
+	hv->closed = 1;
+	if (hyperv_tx_drain(hv) > 0) {
+		/* Hypervisor is not responding, exit with error here */
+		PMD_PWARN_LOG(hv, DBG_LOAD, "Can't drain TX queue: no response");
+		return -EAGAIN;
+	}
+	PMD_PDEBUG_LOG(hv, DBG_LOAD, "TX queue is empty, can halt the device");
+
+	/* Halt and release the rndis device */
+	hv->hlt_req_pending = 1;
+	ret = hv_rf_halt_device(hv);
+	hv->hlt_req_pending = 0;
+
+	rte_free(hv->netvsc_packet);
+
+	return ret;
+}
+
+/*
+ * RNDIS filter set packet filter
+ * Sends an rndis request with the new filter, then waits for a response
+ * from the host.
+ * Returns zero on success, non-zero on failure.
+ */
+static int
+hv_rf_set_packet_filter(struct hv_data *hv, uint32_t new_filter)
+{
+	struct rndis_request *request;
+	struct rndis_set_request *set;
+	struct rndis_set_complete *set_complete;
+	uint32_t status;
+	int ret;
+
+	PMD_INIT_FUNC_TRACE();
+
+	request = hv_rndis_request(hv, REMOTE_NDIS_SET_MSG,
+			RNDIS_MESSAGE_SIZE(struct rndis_set_request) + sizeof(uint32_t));
+	if (!request) {
+		ret = -1;
+		goto cleanup;
+	}
+
+	/* Set up the rndis set */
+	set = &request->request_msg->msg.set_request;
+	set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
+	set->info_buffer_length = sizeof(uint32_t);
+	set->info_buffer_offset = sizeof(struct rndis_set_request);
+
+	rte_memcpy((void *)((unsigned long)set + sizeof(struct rndis_set_request)),
+			&new_filter, sizeof(uint32_t));
+
+	ret = hv_rf_send_request(hv, request);
+	if (ret)
+		goto cleanup;
+
+	/*
+	 * Wait for the response from the host.
+	 */
+	request->response_msg.msg.set_complete.status = 0xFFFF;
+	hv_nv_complete_request(hv, request);
+
+	set_complete = &request->response_msg.msg.set_complete;
+	if (set_complete->status == 0xFFFF) {
+		/* Host is not responding, we can't free request in this case */
+		ret = -1;
+		goto exit;
+	}
+	/* Response received, check status */
+	status = set_complete->status;
+	if (status)
+		/* Bad response status, return error */
+		ret = -2;
+
+cleanup:
+	rte_free(request);
+exit:
+	return ret;
+}
+
+/*
+ * RNDIS filter open device
+ */
+int
+hv_rf_on_open(struct hv_data *hv)
+{
+	int ret;
+
+	if (hv->closed)
+		return 0;
+
+	if (hv->jumbo_frame_support)
+		hv->receive_callback = hv_rf_receive_data_sg;
+
+	ret = hyperv_set_rx_mode(hv, 1, 0);
+	if (!ret) {
+		PMD_PDEBUG_LOG(hv, DBG_LOAD, "RNDIS device opened");
+		hv->rndis_dev_state = RNDIS_DEV_DATAINITIALIZED;
+	} else
+		PMD_PERROR_LOG(hv, DBG_LOAD, "RNDIS device is left unopened");
+
+	return ret;
+}
+
+/*
+ * RNDIS filter on close
+ */
+int
+hv_rf_on_close(struct hv_data *hv)
+{
+	int ret;
+	PMD_INIT_FUNC_TRACE();
+
+	if (hv->closed)
+		return 0;
+
+	if (hv->rndis_dev_state != RNDIS_DEV_DATAINITIALIZED) {
+		PMD_PDEBUG_LOG(hv, DBG_LOAD, "RNDIS device state should be"
+				" RNDIS_DEV_DATAINITIALIZED, but now it is %u",
+				hv->rndis_dev_state);
+		return 0;
+	}
+
+	ret = hv_rf_set_packet_filter(hv, 0);
+	if (!ret) {
+		PMD_PDEBUG_LOG(hv, DBG_LOAD, "RNDIS device closed");
+		hv->rndis_dev_state = RNDIS_DEV_INITIALIZED;
+	} else
+		PMD_PDEBUG_LOG(hv, DBG_LOAD, "RNDIS device is left unclosed");
+
+	return ret;
+}
+
+/*
+ * RX Flow
+ */
+int
+hyperv_get_buffer(struct hv_data *hv, void* buffer, uint32_t bufferlen)
+{
+	uint32_t bytes_rxed;
+	uint64_t request_id;
+	struct hv_vm_packet_descriptor *desc;
+
+	int ret = hv_vmbus_channel_recv_packet_raw(hv, buffer, bufferlen,
+			&bytes_rxed, &request_id, 1);
+	if (likely(ret == 0)) {
+		if (bytes_rxed) {
+			desc = (struct hv_vm_packet_descriptor *)buffer;
+
+			if (likely(desc->type ==
+						HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES)) {
+				hv->pkt_rxed = 0;
+				hv_nv_on_receive(hv, desc);
+				return hv->pkt_rxed;
+			}
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * TX completions handler
+ */
+void
+hyperv_scan_comps(struct hv_data *hv, int allow_rx_drop)
+{
+	uint32_t bytes_rxed;
+	uint64_t request_id;
+
+	while (1) {
+		int ret = hv_vmbus_channel_recv_packet_raw(hv, hv->desc, PAGE_SIZE,
+			&bytes_rxed, &request_id, 2 | allow_rx_drop);
+
+		if (ret != 0 || !bytes_rxed)
+			break;
+
+		if (likely(hv->desc->type == HV_VMBUS_PACKET_TYPE_COMPLETION))
+			hv_nv_on_send_completion(hv, hv->desc);
+	}
+}
+
+/*
+ * Get link status
+ */
+uint8_t
+hyperv_get_link_status(struct hv_data *hv)
+{
+	if (hv_rf_query_device_link_status(hv))
+		return 2;
+	return hv->link_status;
+}
+
+/*
+ * Set/Reset RX mode
+ */
+int
+hyperv_set_rx_mode(struct hv_data *hv, uint8_t promisc, uint8_t mcast)
+{
+	PMD_INIT_FUNC_TRACE();
+
+	if (!promisc) {
+		return hv_rf_set_packet_filter(hv,
+				NDIS_PACKET_TYPE_BROADCAST                   |
+				(mcast ? NDIS_PACKET_TYPE_ALL_MULTICAST : 0) |
+				NDIS_PACKET_TYPE_DIRECTED);
+	}
+
+	return hv_rf_set_packet_filter(hv, NDIS_PACKET_TYPE_PROMISCUOUS);
+}
diff --git a/lib/librte_pmd_hyperv/hyperv_drv.h b/lib/librte_pmd_hyperv/hyperv_drv.h
new file mode 100644
index 0000000..602b3d5
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_drv.h
@@ -0,0 +1,558 @@ 
+/*-
+ * Copyright (c) 2009-2012 Microsoft Corp.
+ * Copyright (c) 2010-2012 Citrix Inc.
+ * Copyright (c) 2012 NetApp Inc.
+ * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _HYPERV_DRV_H_
+#define _HYPERV_DRV_H_
+
+/*
+ * Definitions from hyperv.h
+ */
+#define HW_MACADDR_LEN	6
+#define HV_MAX_PAGE_BUFFER_COUNT	19
+
+#define HV_ALIGN_UP(value, align) \
+		(((value) & (align-1)) ? \
+		    (((value) + (align-1)) & ~(align-1)) : (value))
+
+/*
+ *  Connection identifier type
+ */
+union hv_vmbus_connection_id {
+	uint32_t                as_uint32_t;
+	struct {
+		uint32_t        id:24;
+		uint32_t        reserved:8;
+	} u;
+
+} __attribute__((packed));
+
+union hv_vmbus_monitor_trigger_state {
+	uint32_t as_uint32_t;
+	struct {
+		uint32_t group_enable:4;
+		uint32_t rsvd_z:28;
+	} u;
+};
+
+union hv_vmbus_monitor_trigger_group {
+	uint64_t as_uint64_t;
+	struct {
+		uint32_t pending;
+		uint32_t armed;
+	} u;
+};
+
+struct hv_vmbus_monitor_parameter {
+	union hv_vmbus_connection_id  connection_id;
+	uint16_t                flag_number;
+	uint16_t                rsvd_z;
+};
+
+/*
+ * hv_vmbus_monitor_page Layout
+ * ------------------------------------------------------
+ * | 0   | trigger_state (4 bytes) | Rsvd1 (4 bytes)     |
+ * | 8   | trigger_group[0]                              |
+ * | 10  | trigger_group[1]                              |
+ * | 18  | trigger_group[2]                              |
+ * | 20  | trigger_group[3]                              |
+ * | 28  | Rsvd2[0]                                      |
+ * | 30  | Rsvd2[1]                                      |
+ * | 38  | Rsvd2[2]                                      |
+ * | 40  | next_check_time[0][0] | next_check_time[0][1] |
+ * | ...                                                 |
+ * | 240 | latency[0][0..3]                              |
+ * | 340 | Rsvz3[0]                                      |
+ * | 440 | parameter[0][0]                               |
+ * | 448 | parameter[0][1]                               |
+ * | ...                                                 |
+ * | 840 | Rsvd4[0]                                      |
+ * ------------------------------------------------------
+ */
+
+struct hv_vmbus_monitor_page {
+	union hv_vmbus_monitor_trigger_state  trigger_state;
+	uint32_t                        rsvd_z1;
+
+	union hv_vmbus_monitor_trigger_group  trigger_group[4];
+	uint64_t                        rsvd_z2[3];
+
+	int32_t                         next_check_time[4][32];
+
+	uint16_t                        latency[4][32];
+	uint64_t                        rsvd_z3[32];
+
+	struct hv_vmbus_monitor_parameter      parameter[4][32];
+
+	uint8_t                         rsvd_z4[1984];
+};
+
+enum hv_vmbus_packet_type {
+	HV_VMBUS_PACKET_TYPE_DATA_USING_TRANSFER_PAGES		= 0x7,
+	HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT		= 0x9,
+	HV_VMBUS_PACKET_TYPE_COMPLETION				= 0xb,
+};
+
+#define HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED    1
+
+struct hv_vm_packet_descriptor {
+	uint16_t type;
+	uint16_t data_offset8;
+	uint16_t length8;
+	uint16_t flags;
+	uint64_t transaction_id;
+} __attribute__((packed));
+
+struct hv_vm_transfer_page {
+	uint32_t byte_count;
+	uint32_t byte_offset;
+} __attribute__((packed));
+
+struct hv_vm_transfer_page_packet_header {
+	struct hv_vm_packet_descriptor d;
+	uint16_t                       transfer_page_set_id;
+	uint8_t                        sender_owns_set;
+	uint8_t                        reserved;
+	uint32_t                       range_count;
+	struct hv_vm_transfer_page     ranges[1];
+} __attribute__((packed));
+
+struct hv_vmbus_ring_buffer {
+	volatile uint32_t       write_index;
+	volatile uint32_t       read_index;
+	/*
+	 * NOTE: The interrupt_mask field is used only for channels, but
+	 * vmbus connection also uses this data structure
+	 */
+	volatile uint32_t       interrupt_mask;
+	/* pad it to PAGE_SIZE so that data starts on a page */
+	uint8_t                 reserved[4084];
+
+	/*
+	 * WARNING: Ring data starts here + ring_data_start_offset
+	 *  !!! DO NOT place any fields below this !!!
+	 */
+	uint8_t			buffer[0];	/* doubles as interrupt mask */
+} __attribute__((packed));
+
+struct hv_vmbus_page_buffer {
+	uint32_t	length;
+	uint32_t	offset;
+	uint64_t	pfn;
+} __attribute__((packed));
+
+/*
+ * Definitions from hv_vmbus_priv.h
+ */
+struct hv_vmbus_sg_buffer_list {
+	void*		data;
+	uint32_t	length;
+};
+
+struct hv_vmbus_channel_packet_page_buffer {
+	uint16_t		type;
+	uint16_t		data_offset8;
+	uint16_t		length8;
+	uint16_t		flags;
+	uint64_t		transaction_id;
+	uint32_t		reserved;
+	uint32_t		range_count;
+	struct hv_vmbus_page_buffer	range[HV_MAX_PAGE_BUFFER_COUNT];
+} __attribute__((packed));
+
+/*
+ * Definitions from hv_net_vsc.h
+ */
+#define NETVSC_PACKET_MAXPAGE 16
+#define NETVSC_PACKET_SIZE    256
+
+/*
+ * This message is used by both the VSP and the VSC to complete
+ * a RNDIS message to the opposite channel endpoint.  At this
+ * point, the initiator of this message cannot use any resources
+ * associated with the original RNDIS packet.
+ */
+enum nvsp_status_ {
+	nvsp_status_none = 0,
+	nvsp_status_success,
+	nvsp_status_failure,
+};
+
+struct nvsp_1_msg_send_rndis_pkt_complete {
+	uint32_t                                status;
+} __attribute__((packed));
+
+enum nvsp_msg_type {
+	/*
+	 * Version 1 Messages
+	 */
+	nvsp_msg_1_type_send_ndis_vers          = 100,
+
+	nvsp_msg_1_type_send_rx_buf,
+	nvsp_msg_1_type_send_rx_buf_complete,
+	nvsp_msg_1_type_revoke_rx_buf,
+
+	nvsp_msg_1_type_send_send_buf,
+	nvsp_msg_1_type_send_send_buf_complete,
+	nvsp_msg_1_type_revoke_send_buf,
+
+	nvsp_msg_1_type_send_rndis_pkt,
+	nvsp_msg_1_type_send_rndis_pkt_complete,
+};
+
+struct nvsp_1_msg_send_rndis_pkt {
+	/*
+	 * This field is specified by RNDIS.  They assume there's
+	 * two different channels of communication. However,
+	 * the Network VSP only has one.  Therefore, the channel
+	 * travels with the RNDIS packet.
+	 */
+	uint32_t                                chan_type;
+
+	/*
+	 * This field is used to send part or all of the data
+	 * through a send buffer. This value specifies an
+	 * index into the send buffer.  If the index is
+	 * 0xFFFFFFFF, then the send buffer is not being used
+	 * and all of the data was sent through other VMBus
+	 * mechanisms.
+	 */
+	uint32_t                                send_buf_section_idx;
+	uint32_t                                send_buf_section_size;
+} __attribute__((packed));
+
+/*
+ * ALL Messages
+ */
+struct nvsp_msg {
+	uint32_t                                msg_type;
+	union {
+		struct nvsp_1_msg_send_rndis_pkt               send_rndis_pkt;
+		struct nvsp_1_msg_send_rndis_pkt_complete      send_rndis_pkt_complete;
+		/* size is set like in linux kernel driver */
+		uint8_t raw[24];
+	} msgs;
+} __attribute__((packed));
+
+#define NETVSC_RECEIVE_BUFFER_ID                0xcafe
+
+struct netvsc_packet {
+	uint8_t             is_data_pkt;      /* One byte */
+	uint8_t             ext_pages;
+	uint16_t            vlan_tci;
+
+	void                *extension;
+	uint64_t            extension_phys_addr;
+	uint32_t            tot_data_buf_len;
+	uint32_t            page_buf_count;
+	struct hv_vmbus_page_buffer page_buffers[NETVSC_PACKET_MAXPAGE];
+};
+
+/*
+ * Definitions from hv_rndis.h
+ */
+#define RNDIS_MAJOR_VERSION                             0x00000001
+#define RNDIS_MINOR_VERSION                             0x00000000
+
+#define STATUS_BUFFER_OVERFLOW                          (0x80000005L)
+
+/*
+ * Remote NDIS message types
+ */
+#define REMOTE_NDIS_PACKET_MSG                          0x00000001
+#define REMOTE_NDIS_INITIALIZE_MSG                      0x00000002
+#define REMOTE_NDIS_HALT_MSG                            0x00000003
+#define REMOTE_NDIS_QUERY_MSG                           0x00000004
+#define REMOTE_NDIS_SET_MSG                             0x00000005
+#define REMOTE_NDIS_RESET_MSG                           0x00000006
+#define REMOTE_NDIS_INDICATE_STATUS_MSG                 0x00000007
+#define REMOTE_NDIS_KEEPALIVE_MSG                       0x00000008
+/*
+ * Remote NDIS message completion types
+ */
+#define REMOTE_NDIS_INITIALIZE_CMPLT                    0x80000002
+#define REMOTE_NDIS_QUERY_CMPLT                         0x80000004
+#define REMOTE_NDIS_SET_CMPLT                           0x80000005
+#define REMOTE_NDIS_RESET_CMPLT                         0x80000006
+#define REMOTE_NDIS_KEEPALIVE_CMPLT                     0x80000008
+
+#define RNDIS_OID_GEN_MEDIA_CONNECT_STATUS              0x00010114
+#define RNDIS_OID_GEN_CURRENT_PACKET_FILTER             0x0001010E
+#define RNDIS_OID_802_3_PERMANENT_ADDRESS               0x01010101
+#define RNDIS_OID_802_3_CURRENT_ADDRESS                 0x01010102
+#define RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER            0x0001021B
+
+#define RNDIS_CONFIG_PARAM_TYPE_STRING      2
+/* extended info after the RNDIS request message */
+#define RNDIS_EXT_LEN                       100
+/*
+ * Packet extension field contents associated with a Data message.
+ */
+struct rndis_per_packet_info {
+	uint32_t            size;
+	uint32_t            type;
+	uint32_t            per_packet_info_offset;
+};
+
+#define ieee_8021q_info 6
+
+struct ndis_8021q_info {
+	union {
+		struct {
+			uint32_t   user_pri:3;  /* User Priority */
+			uint32_t   cfi:1;  /* Canonical Format ID */
+			uint32_t   vlan_id:12;
+			uint32_t   reserved:16;
+		} s1;
+		uint32_t    value;
+	} u1;
+};
+
+/* Format of Information buffer passed in a SetRequest for the OID */
+/* OID_GEN_RNDIS_CONFIG_PARAMETER. */
+struct rndis_config_parameter_info {
+	uint32_t parameter_name_offset;
+	uint32_t parameter_name_length;
+	uint32_t parameter_type;
+	uint32_t parameter_value_offset;
+	uint32_t parameter_value_length;
+};
+
+/*
+ * NdisInitialize message
+ */
+struct rndis_initialize_request {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	uint32_t            major_version;
+	uint32_t            minor_version;
+	uint32_t            max_xfer_size;
+};
+
+/*
+ * Response to NdisInitialize
+ */
+struct rndis_initialize_complete {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	/* RNDIS status */
+	uint32_t            status;
+	uint32_t            major_version;
+	uint32_t            minor_version;
+	uint32_t            device_flags;
+	/* RNDIS medium */
+	uint32_t            medium;
+	uint32_t            max_pkts_per_msg;
+	uint32_t            max_xfer_size;
+	uint32_t            pkt_align_factor;
+	uint32_t            af_list_offset;
+	uint32_t            af_list_size;
+};
+
+/*
+ * NdisSetRequest message
+ */
+struct rndis_set_request {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	/* RNDIS OID */
+	uint32_t            oid;
+	uint32_t            info_buffer_length;
+	uint32_t            info_buffer_offset;
+	/* RNDIS handle */
+	uint32_t            device_vc_handle;
+};
+
+/*
+ * Response to NdisSetRequest
+ */
+struct rndis_set_complete {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	/* RNDIS status */
+	uint32_t            status;
+};
+
+/*
+ * NdisQueryRequest message
+ */
+struct rndis_query_request {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	/* RNDIS OID */
+	uint32_t            oid;
+	uint32_t            info_buffer_length;
+	uint32_t            info_buffer_offset;
+	/* RNDIS handle */
+	uint32_t            device_vc_handle;
+};
+
+/*
+ * Response to NdisQueryRequest
+ */
+struct rndis_query_complete {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+	/* RNDIS status */
+	uint32_t            status;
+	uint32_t            info_buffer_length;
+	uint32_t            info_buffer_offset;
+};
+
+/*
+ * Data message. All offset fields contain byte offsets from the beginning
+ * of the rndis_packet structure. All length fields are in bytes.
+ * VcHandle is set to 0 for connectionless data, otherwise it
+ * contains the VC handle.
+ */
+struct rndis_packet {
+	uint32_t            data_offset;
+	uint32_t            data_length;
+	uint32_t            oob_data_offset;
+	uint32_t            oob_data_length;
+	uint32_t            num_oob_data_elements;
+	uint32_t            per_pkt_info_offset;
+	uint32_t            per_pkt_info_length;
+	/* RNDIS handle */
+	uint32_t            vc_handle;
+	uint32_t            reserved;
+};
+
+/*
+ * NdisHalt message
+ */
+struct rndis_halt_request {
+	/* RNDIS request ID */
+	uint32_t            request_id;
+};
+
+/*
+ * NdisMIndicateStatus message
+ */
+struct rndis_indicate_status {
+	/* RNDIS status */
+	uint32_t                                status;
+	uint32_t                                status_buf_length;
+	uint32_t                                status_buf_offset;
+};
+
+#define RNDIS_STATUS_MEDIA_CONNECT              (0x4001000BL)
+#define RNDIS_STATUS_MEDIA_DISCONNECT           (0x4001000CL)
+#define RNDIS_STATUS_INVALID_DATA               (0xC0010015L)
+
+/*
+ * union with all of the RNDIS messages
+ */
+union rndis_msg_container {
+	struct rndis_initialize_request                init_request;
+	struct rndis_initialize_complete               init_complete;
+	struct rndis_set_request                       set_request;
+	struct rndis_set_complete                      set_complete;
+	struct rndis_query_request                     query_request;
+	struct rndis_query_complete                    query_complete;
+	struct rndis_packet                            packet;
+	struct rndis_halt_request                      halt_request;
+	struct rndis_indicate_status                   indicate_status;
+#if 0
+	rndis_keepalive_request                 keepalive_request;
+	rndis_reset_request                     reset_request;
+	rndis_reset_complete                    reset_complete;
+	rndis_keepalive_complete                keepalive_complete;
+	rcondis_mp_create_vc                    co_miniport_create_vc;
+	rcondis_mp_delete_vc                    co_miniport_delete_vc;
+	rcondis_indicate_status                 co_miniport_status;
+	rcondis_mp_activate_vc_request          co_miniport_activate_vc;
+	rcondis_mp_deactivate_vc_request        co_miniport_deactivate_vc;
+	rcondis_mp_create_vc_complete           co_miniport_create_vc_complete;
+	rcondis_mp_delete_vc_complete           co_miniport_delete_vc_complete;
+	rcondis_mp_activate_vc_complete         co_miniport_activate_vc_complete;
+	rcondis_mp_deactivate_vc_complete       co_miniport_deactivate_vc_complete;
+#endif
+	uint32_t packet_ex[16]; /* to pad the union size */
+};
+
+struct rndis_msg {
+	uint32_t         ndis_msg_type;
+
+	/*
+	 * Total length of this message, from the beginning
+	 * of the rndis_msg struct, in bytes.
+	 */
+	uint32_t         msg_len;
+
+	/* Actual message */
+	union rndis_msg_container msg;
+};
+
+#define RNDIS_HEADER_SIZE (sizeof(struct rndis_msg) - sizeof(union rndis_msg_container))
+
+#define NDIS_PACKET_TYPE_DIRECTED       0x00000001
+#define NDIS_PACKET_TYPE_MULTICAST      0x00000002
+#define NDIS_PACKET_TYPE_ALL_MULTICAST  0x00000004
+#define NDIS_PACKET_TYPE_BROADCAST      0x00000008
+#define NDIS_PACKET_TYPE_SOURCE_ROUTING 0x00000010
+#define NDIS_PACKET_TYPE_PROMISCUOUS    0x00000020
+
+/*
+ * get the size of an RNDIS message. Pass in the message type,
+ * rndis_set_request, rndis_packet for example
+ */
+#define RNDIS_MESSAGE_SIZE(message) \
+	(sizeof(message) + (sizeof(struct rndis_msg) - sizeof(union rndis_msg_container)))
+
+
+/*
+ * Definitions from hv_rndis_filter.h
+ */
+enum {
+	RNDIS_DEV_UNINITIALIZED = 0,
+	RNDIS_DEV_INITIALIZING,
+	RNDIS_DEV_INITIALIZED,
+	RNDIS_DEV_DATAINITIALIZED,
+};
+
+struct rndis_request {
+	/* assumed a fixed size response here. */
+	struct rndis_msg    response_msg;
+
+	/* Simplify allocation by having a netvsc packet inline */
+	struct netvsc_packet pkt;
+	/* set additional buffer since packet can cross page boundary */
+	struct hv_vmbus_page_buffer buffer;
+	/* assumed a fixed size request here. */
+	struct rndis_msg    *request_msg;
+	const struct rte_memzone *request_msg_memzone;
+};
+
+struct rndis_filter_packet {
+	struct rndis_msg                       message;
+};
+
+#endif /* _HYPERV_DRV_H_ */
diff --git a/lib/librte_pmd_hyperv/hyperv_ethdev.c b/lib/librte_pmd_hyperv/hyperv_ethdev.c
new file mode 100644
index 0000000..cf6d12f
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_ethdev.c
@@ -0,0 +1,334 @@ 
+/*-
+ * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
+ * All rights reserved.
+ */
+
+#include <assert.h>
+#include <unistd.h>
+#include "hyperv.h"
+
+static struct rte_vmbus_id vmbus_id_hyperv_map[] = {
+	{
+		.device_id = 0x0,
+	},
+};
+
+static void
+hyperv_dev_info_get(__rte_unused struct rte_eth_dev *dev,
+		struct rte_eth_dev_info *dev_info)
+{
+	PMD_INIT_FUNC_TRACE();
+	dev_info->max_rx_queues  = HV_MAX_RX_QUEUES;
+	dev_info->max_tx_queues  = HV_MAX_TX_QUEUES;
+	dev_info->min_rx_bufsize = HV_MIN_RX_BUF_SIZE;
+	dev_info->max_rx_pktlen  = HV_MAX_RX_PKT_LEN;
+	dev_info->max_mac_addrs  = HV_MAX_MAC_ADDRS;
+}
+
+inline int
+rte_hv_dev_atomic_write_link_status(struct rte_eth_dev *dev,
+		struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = &(dev->data->dev_link);
+	struct rte_eth_link *src = link;
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+				*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+inline int
+rte_hv_dev_atomic_read_link_status(struct rte_eth_dev *dev,
+		struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = link;
+	struct rte_eth_link *src = &(dev->data->dev_link);
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+				*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+/* return 0 means link status changed, -1 means not changed */
+static int
+hyperv_dev_link_update(struct rte_eth_dev *dev,
+		__rte_unused int wait_to_complete)
+{
+	uint8_t ret;
+	struct rte_eth_link old, link;
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	memset(&old, 0, sizeof(old));
+	memset(&link, 0, sizeof(link));
+	rte_hv_dev_atomic_read_link_status(dev, &old);
+	if (!hv->link_status && (hv->link_req_cnt == HV_MAX_LINK_REQ)) {
+		ret = hyperv_get_link_status(hv);
+		if (ret > 1)
+			return -1;
+		hv->link_req_cnt = 0;
+	}
+	link.link_duplex = ETH_LINK_FULL_DUPLEX;
+	link.link_speed = ETH_LINK_SPEED_10000;
+	link.link_status = hv->link_status;
+	hv->link_req_cnt++;
+	rte_hv_dev_atomic_write_link_status(dev, &link);
+
+	return (old.link_status == link.link_status) ? -1 : 0;
+}
+
+static int
+hyperv_dev_configure(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+	const struct rte_eth_rxmode *rxmode
+		= &dev->data->dev_conf.rxmode;
+
+	PMD_INIT_FUNC_TRACE();
+
+	rte_memcpy(dev->data->mac_addrs->addr_bytes, hv->hw_mac_addr,
+			ETHER_ADDR_LEN);
+	hv->jumbo_frame_support = rxmode->jumbo_frame;
+
+	return 0;
+}
+
+static int
+hyperv_init(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+	struct rte_vmbus_device *vmbus_dev;
+
+	vmbus_dev = dev->vmbus_dev;
+	hv->uio_fd = vmbus_dev->uio_fd;
+	hv->kernel_initialized = 1;
+	hv->vmbus_device = vmbus_dev->id.device_id;
+	hv->monitor_bit = (uint8_t)(vmbus_dev->vmbus_monitor_id % 32);
+	hv->monitor_group = (uint8_t)(vmbus_dev->vmbus_monitor_id / 32);
+	PMD_PDEBUG_LOG(hv, DBG_LOAD, "hyperv_init for vmbus device %d",
+			vmbus_dev->id.device_id);
+
+	/* get the memory mappings */
+	hv->ring_pages = vmbus_dev->mem_resource[TXRX_RING_MAP].addr;
+	hv->int_page = vmbus_dev->mem_resource[INT_PAGE_MAP].addr;
+	hv->monitor_pages =
+		(struct hv_vmbus_monitor_page *)
+		vmbus_dev->mem_resource[MON_PAGE_MAP].addr;
+	hv->recv_buf = vmbus_dev->mem_resource[RECV_BUF_MAP].addr;
+	assert(hv->ring_pages);
+	assert(hv->int_page);
+	assert(hv->monitor_pages);
+	assert(hv->recv_buf);
+
+	/* separate send/recv int_pages */
+	hv->recv_interrupt_page = hv->int_page;
+
+	hv->send_interrupt_page =
+		((uint8_t *) hv->int_page + (PAGE_SIZE >> 1));
+
+	/* retrieve in/out ring_buffers */
+	hv->out = hv->ring_pages;
+	hv->in  = (void*)((uint64_t)hv->out +
+			(vmbus_dev->mem_resource[TXRX_RING_MAP].len / 2));
+	hv->rb_size = (vmbus_dev->mem_resource[TXRX_RING_MAP].len / 2);
+
+	dev->rx_pkt_burst = hyperv_recv_pkts;
+	dev->tx_pkt_burst = hyperv_xmit_pkts;
+
+	return hv_rf_on_device_add(hv);
+}
+
+#define HV_DEV_ID (hv->vmbus_device << 1)
+#define HV_MTU (dev->data->dev_conf.rxmode.max_rx_pkt_len << 9)
+
+static int
+hyperv_dev_start(struct rte_eth_dev *dev)
+{
+	int ret;
+	uint32_t cmd;
+	size_t bytes;
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	if (!hv->kernel_initialized) {
+		cmd = HV_DEV_ID | HV_MTU;
+		bytes = write(hv->uio_fd, &cmd, sizeof(uint32_t));
+		if (bytes < sizeof(uint32_t)) {
+			PMD_PERROR_LOG(hv, DBG_LOAD, "write on uio_fd %d failed",
+					hv->uio_fd);
+			return -1;
+		}
+		ret = vmbus_uio_map_resource(dev->vmbus_dev);
+		if (ret < 0) {
+			PMD_PERROR_LOG(hv, DBG_LOAD, "Failed to map resources");
+			return ret;
+		}
+		ret = hyperv_init(dev);
+		if (ret)
+			return ret;
+	}
+	ret = hv_rf_on_open(hv);
+	if (ret) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "hv_rf_on_open failed");
+		return ret;
+	}
+	hv->link_req_cnt = HV_MAX_LINK_REQ;
+
+	return ret;
+}
+
+static void
+hyperv_dev_stop(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+	uint32_t cmd;
+	size_t bytes;
+
+	PMD_INIT_FUNC_TRACE();
+	if (!hv->closed) {
+		hv_rf_on_close(hv);
+		hv_rf_on_device_remove(hv);
+		if (hv->kernel_initialized) {
+			cmd = 1 | HV_DEV_ID;
+			bytes = write(hv->uio_fd, &cmd, sizeof(uint32_t));
+			if (bytes)
+				hv->kernel_initialized = 0;
+			else
+				PMD_PWARN_LOG(hv, DBG_LOAD, "write to uio_fd %d failed: (%zu)b",
+						hv->uio_fd, bytes);
+		}
+		hv->link_status = 0;
+	}
+}
+
+static void
+hyperv_dev_close(struct rte_eth_dev *dev)
+{
+	PMD_INIT_FUNC_TRACE();
+	hyperv_dev_stop(dev);
+}
+
+static void
+hyperv_dev_promisc_enable(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	hyperv_set_rx_mode(hv, 1, dev->data->all_multicast);
+}
+
+static void
+hyperv_dev_promisc_disable(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	hyperv_set_rx_mode(hv, 0, dev->data->all_multicast);
+}
+
+static void
+hyperv_dev_allmulticast_enable(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	hyperv_set_rx_mode(hv, dev->data->promiscuous, 1);
+}
+
+static void
+hyperv_dev_allmulticast_disable(struct rte_eth_dev *dev)
+{
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	hyperv_set_rx_mode(hv, dev->data->promiscuous, 0);
+}
+
+static void
+hyperv_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	struct hv_data *hv = dev->data->dev_private;
+	struct hv_stats *st = &hv->stats;
+
+	PMD_INIT_FUNC_TRACE();
+
+	memset(stats, 0, sizeof(struct rte_eth_stats));
+
+	stats->opackets = st->opkts;
+	stats->obytes = st->obytes;
+	stats->oerrors = st->oerrors;
+	stats->ipackets = st->ipkts;
+	stats->ibytes = st->ibytes;
+	stats->ierrors = st->ierrors;
+	stats->rx_nombuf = st->rx_nombuf;
+}
+
+static struct eth_dev_ops hyperv_eth_dev_ops = {
+	.dev_configure		= hyperv_dev_configure,
+	.dev_start		= hyperv_dev_start,
+	.dev_stop		= hyperv_dev_stop,
+	.dev_infos_get		= hyperv_dev_info_get,
+	.rx_queue_release	= hyperv_dev_rx_queue_release,
+	.tx_queue_release	= hyperv_dev_tx_queue_release,
+	.rx_queue_setup		= hyperv_dev_rx_queue_setup,
+	.tx_queue_setup		= hyperv_dev_tx_queue_setup,
+	.dev_close		= hyperv_dev_close,
+	.promiscuous_enable	= hyperv_dev_promisc_enable,
+	.promiscuous_disable	= hyperv_dev_promisc_disable,
+	.allmulticast_enable	= hyperv_dev_allmulticast_enable,
+	.allmulticast_disable	= hyperv_dev_allmulticast_disable,
+	.link_update		= hyperv_dev_link_update,
+	.stats_get		= hyperv_dev_stats_get,
+};
+
+static int
+eth_hyperv_dev_init(__rte_unused struct eth_driver *eth_drv,
+		    struct rte_eth_dev *eth_dev)
+{
+	int ret;
+
+	PMD_INIT_FUNC_TRACE();
+
+	eth_dev->dev_ops = &hyperv_eth_dev_ops;
+	eth_dev->data->mac_addrs = rte_malloc("mac_addrs",
+					      sizeof(struct ether_addr),
+					      RTE_CACHE_LINE_SIZE);
+	if (!eth_dev->data->mac_addrs) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "unable to allocate memory for mac addrs");
+		return -1;
+	}
+
+	ret = hyperv_init(eth_dev);
+
+	return ret;
+}
+
+static struct eth_driver rte_hyperv_pmd = {
+	.vmbus_drv = {
+		.name = "rte_hyperv_pmd",
+		.module_name = "hv_uio",
+		.id_table = vmbus_id_hyperv_map,
+	},
+	.bus_type = RTE_BUS_VMBUS,
+	.eth_dev_init = eth_hyperv_dev_init,
+	.dev_private_size = sizeof(struct hv_data),
+};
+
+static int
+rte_hyperv_pmd_init(const char *name __rte_unused,
+		    const char *param __rte_unused)
+{
+	rte_eth_driver_register(&rte_hyperv_pmd);
+	return 0;
+}
+
+static struct rte_driver rte_hyperv_driver = {
+	.type = PMD_PDEV,
+	.init = rte_hyperv_pmd_init,
+};
+
+PMD_REGISTER_DRIVER(rte_hyperv_driver);
diff --git a/lib/librte_pmd_hyperv/hyperv_logs.h b/lib/librte_pmd_hyperv/hyperv_logs.h
new file mode 100644
index 0000000..e203aa3
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_logs.h
@@ -0,0 +1,68 @@ 
+/*-
+ *   Copyright(c) 2013-2015 Brocade Communications Systems, Inc.
+ *   All rights reserved.
+ */
+
+#ifndef _HYPERV_LOGS_H_
+#define _HYPERV_LOGS_H_
+
+#ifdef RTE_LIBRTE_HV_DEBUG_INIT
+#define PMD_INIT_LOG(level, fmt, args...) \
+	RTE_LOG(level, PMD, "%s(): " fmt "\n", __func__, ## args); fflush(stdout);
+#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_HV_DEBUG
+
+#define RTE_DBG_LOAD   INIT
+#define RTE_DBG_STATS  STATS
+#define RTE_DBG_TX     TX
+#define RTE_DBG_RX     RX
+#define RTE_DBG_MBUF   MBUF
+#define RTE_DBG_ASSERT ASRT
+#define RTE_DBG_RB     RB
+#define RTE_DBG_VMBUS  VMBUS
+#define RTE_DBG_ALL    ALL
+
+#define STR(x) #x
+
+#define HV_RTE_LOG(hv, codepath, level, fmt, args...) \
+	RTE_LOG(level, PMD, "[%d]: %-6s: %s: " fmt "\n", hv->vmbus_device, STR(codepath), __func__, ## args);
+
+#define PMD_PDEBUG_LOG(hv, codepath, fmt, args...) \
+do { \
+	if (unlikely(hv->debug & (codepath))) \
+		HV_RTE_LOG(hv, RTE_##codepath, DEBUG, fmt, ## args) \
+} while (0)
+
+#define PMD_PINFO_LOG(hv, codepath, fmt, args...) \
+do { \
+	if (unlikely(hv->debug & (codepath))) \
+		HV_RTE_LOG(hv, RTE_##codepath, INFO, fmt, ## args) \
+} while (0)
+
+#define PMD_PWARN_LOG(hv, codepath, fmt, args...) \
+do { \
+	if (unlikely(hv->debug & (codepath))) \
+		HV_RTE_LOG(hv, RTE_##codepath, WARNING, fmt, ## args) \
+} while (0)
+
+#define PMD_PERROR_LOG(hv, codepath, fmt, args...) \
+do { \
+	if (unlikely(hv->debug & (codepath))) \
+		HV_RTE_LOG(hv, RTE_##codepath, ERR, fmt, ## args) \
+} while (0)
+#else
+#define HV_RTE_LOG(level, fmt, args...) do { } while (0)
+#define PMD_PDEBUG_LOG(fmt, args...) do { } while (0)
+#define PMD_PINFO_LOG(fmt, args...) do { } while (0)
+#define PMD_PWARN_LOG(fmt, args...) do { } while (0)
+#define PMD_PERROR_LOG(fmt, args...) do { } while (0)
+#undef RTE_LIBRTE_HV_DEBUG_TX
+#undef RTE_LIBRTE_HV_DEBUG_RX
+#endif
+
+#endif /* _HYPERV_LOGS_H_ */
diff --git a/lib/librte_pmd_hyperv/hyperv_rxtx.c b/lib/librte_pmd_hyperv/hyperv_rxtx.c
new file mode 100644
index 0000000..a9f80f9
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_rxtx.c
@@ -0,0 +1,402 @@ 
+/*-
+ *   Copyright(c) 2013-2015 Brocade Communications Systems, Inc.
+ *   All rights reserved.
+ */
+
+#include "hyperv.h"
+#include "hyperv_rxtx.h"
+#include "hyperv_drv.h"
+
+#define RTE_MBUF_DATA_DMA_ADDR(mb) \
+	(uint64_t) ((mb)->buf_physaddr + (mb)->data_off)
+
+#define RPPI_SIZE 	(sizeof(struct rndis_per_packet_info)\
+			 + sizeof(struct ndis_8021q_info))
+#define RNDIS_OFF 	(sizeof(struct netvsc_packet) + RPPI_SIZE)
+#define TX_PKT_SIZE	(RNDIS_OFF + sizeof(struct rndis_filter_packet) * 2)
+
+static inline struct rte_mbuf *
+hv_rxmbuf_alloc(struct rte_mempool *mp)
+{
+	return  __rte_mbuf_raw_alloc(mp);
+}
+
+static inline int
+hyperv_has_rx_work(struct hv_data *hv)
+{
+	return hv->in->read_index != hv->in->write_index;
+}
+
+#ifndef DEFAULT_TX_FREE_THRESHOLD
+#define DEFAULT_TX_FREE_THRESHOLD 32
+#endif
+
+int
+hyperv_dev_tx_queue_setup(struct rte_eth_dev *dev,
+			  uint16_t queue_idx,
+			  uint16_t nb_desc,
+			  unsigned int socket_id,
+			  const struct rte_eth_txconf *tx_conf)
+
+{
+	struct hv_data *hv = dev->data->dev_private;
+	const struct rte_memzone *tz;
+	struct hv_tx_queue *txq;
+	char tz_name[RTE_MEMZONE_NAMESIZE];
+	uint32_t i, delta = 0, new_delta;
+	struct netvsc_packet *pkt;
+
+	PMD_INIT_FUNC_TRACE();
+
+	txq = rte_zmalloc_socket("ethdev TX queue", sizeof(struct hv_tx_queue),
+				 RTE_CACHE_LINE_SIZE, socket_id);
+	if (txq == NULL) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "rte_zmalloc for tx_queue failed");
+		return -ENOMEM;
+	}
+
+	if (tx_conf->tx_free_thresh >= nb_desc) {
+		PMD_PERROR_LOG(hv, DBG_LOAD,
+			       "tx_free_thresh should be less then nb_desc");
+		return -EINVAL;
+	}
+	txq->tx_free_thresh = (tx_conf->tx_free_thresh ? tx_conf->tx_free_thresh :
+			       DEFAULT_TX_FREE_THRESHOLD);
+	txq->pkts = rte_calloc_socket("TX pkts", sizeof(void*), nb_desc,
+				       RTE_CACHE_LINE_SIZE, socket_id);
+	if (txq->pkts == NULL) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "rte_zmalloc for pkts failed");
+		return -ENOMEM;
+	}
+	sprintf(tz_name, "hv_%d_%u_%u", hv->vmbus_device, queue_idx, socket_id);
+	tz = rte_memzone_reserve_aligned(tz_name,
+					 (uint32_t)nb_desc * TX_PKT_SIZE,
+					 rte_lcore_to_socket_id(rte_lcore_id()),
+					 0, PAGE_SIZE);
+	if (tz == NULL) {
+		PMD_PERROR_LOG(hv, DBG_LOAD, "netvsc packet ring alloc fail");
+		return -ENOMEM;
+	}
+	for (i = 0; i < nb_desc; i++) {
+		pkt = txq->pkts[i] = (struct netvsc_packet *)((uint8_t *)tz->addr +
+							      i * TX_PKT_SIZE + delta);
+		pkt->extension = (uint8_t *)tz->addr + i * TX_PKT_SIZE + RNDIS_OFF + delta;
+		if (!pkt->extension) {
+			PMD_PERROR_LOG(hv, DBG_TX,
+				       "pkt->extension is NULL for %d-th pkt", i);
+			return -EINVAL;
+		}
+		pkt->extension_phys_addr =
+			tz->phys_addr + i * TX_PKT_SIZE + RNDIS_OFF + delta;
+		pkt->ext_pages = 1;
+		pkt->page_buffers[0].pfn = pkt->extension_phys_addr >> PAGE_SHIFT;
+		pkt->page_buffers[0].offset =
+			(unsigned long)pkt->extension & (PAGE_SIZE - 1);
+		pkt->page_buffers[0].length = RNDIS_MESSAGE_SIZE(struct rndis_packet);
+		if (pkt->page_buffers[0].offset + pkt->page_buffers[0].length
+		    > PAGE_SIZE) {
+			new_delta = PAGE_SIZE - pkt->page_buffers[0].offset;
+			pkt->page_buffers[0].pfn++;
+			delta += new_delta;
+			pkt->page_buffers[0].offset = 0;
+			pkt->extension = (uint8_t *)pkt->extension + new_delta;
+			pkt->extension_phys_addr += new_delta;
+		}
+	}
+	txq->sw_ring = rte_calloc_socket("txq_sw_ring",
+					 sizeof(struct rte_mbuf *), nb_desc,
+					 RTE_CACHE_LINE_SIZE, socket_id);
+	if (txq->sw_ring == NULL) {
+		hyperv_dev_tx_queue_release(txq);
+		return -ENOMEM;
+	}
+	txq->port_id = dev->data->port_id;
+	txq->nb_tx_desc = txq->tx_avail = nb_desc;
+	txq->tx_free_thresh = tx_conf->tx_free_thresh;
+	txq->hv = hv;
+	dev->data->tx_queues[queue_idx] = txq;
+	hv->txq = txq;
+
+	return 0;
+}
+
+void
+hyperv_dev_tx_queue_release(void *ptxq)
+{
+	struct hv_tx_queue *txq = ptxq;
+
+	PMD_INIT_FUNC_TRACE();
+	if (txq == NULL)
+		return;
+	rte_free(txq->sw_ring);
+	rte_free(txq->pkts);
+	rte_free(txq);
+}
+
+int
+hyperv_dev_rx_queue_setup(struct rte_eth_dev *dev,
+			  uint16_t queue_idx,
+			  uint16_t nb_desc,
+			  unsigned int socket_id,
+			  const struct rte_eth_rxconf *rx_conf,
+			  struct rte_mempool *mp)
+{
+	uint16_t i;
+	struct hv_rx_queue *rxq;
+	struct rte_mbuf *mbuf;
+	struct hv_data *hv = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+
+	rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct hv_rx_queue),
+				 RTE_CACHE_LINE_SIZE, socket_id);
+	if (rxq == NULL) {
+		PMD_PERROR_LOG(hv, DBG_LOAD,
+			       "rte_zmalloc for rx_queue failed!");
+		return -ENOMEM;
+	}
+	hv->desc = rxq->desc = rte_zmalloc_socket(NULL, PAGE_SIZE,
+						  RTE_CACHE_LINE_SIZE, socket_id);
+	if (rxq->desc == NULL) {
+		PMD_PERROR_LOG(hv, DBG_LOAD,
+			       "rte_zmalloc for vmbus_desc failed!");
+		hyperv_dev_rx_queue_release(rxq);
+		return -ENOMEM;
+	}
+	rxq->sw_ring = rte_calloc_socket("rxq->sw_ring",
+					 sizeof(struct mbuf *), nb_desc,
+					 RTE_CACHE_LINE_SIZE, socket_id);
+	if (rxq->sw_ring == NULL) {
+		hyperv_dev_rx_queue_release(rxq);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < nb_desc; i++) {
+		mbuf = hv_rxmbuf_alloc(mp);
+		if (mbuf == NULL) {
+			PMD_PERROR_LOG(hv, DBG_LOAD, "RX mbuf alloc failed");
+			return -ENOMEM;
+		}
+
+		mbuf->nb_segs = 1;
+		mbuf->next = NULL;
+		mbuf->port = rxq->port_id;
+		rxq->sw_ring[i] = mbuf;
+	}
+
+	rxq->mb_pool = mp;
+	rxq->nb_rx_desc = nb_desc;
+	rxq->rx_head = 0;
+	rxq->rx_tail = 0;
+	rxq->rx_free_thresh = rx_conf->rx_free_thresh;
+	rxq->port_id = dev->data->port_id;
+	rxq->hv = hv;
+	dev->data->rx_queues[queue_idx] = rxq;
+	hv->rxq = rxq;
+	hv->max_rx_pkt_len = mp->elt_size -
+		(sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM);
+
+	return 0;
+}
+
+void
+hyperv_dev_rx_queue_release(void *prxq)
+{
+	struct hv_rx_queue *rxq = prxq;
+
+	PMD_INIT_FUNC_TRACE();
+	if (rxq == NULL)
+		return;
+	rte_free(rxq->sw_ring);
+	rte_free(rxq->desc);
+	rte_free(rxq);
+}
+
+uint16_t
+hyperv_recv_pkts(void *prxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+	struct hv_rx_queue *rxq = prxq;
+	struct hv_data *hv = rxq->hv;
+	struct rte_mbuf *new_mb, *rx_mbuf, *first_mbuf;
+	uint16_t nb_rx = 0;
+	uint16_t segs, i;
+
+	if (unlikely(hv->closed))
+		return 0;
+
+	nb_pkts = MIN(nb_pkts, HV_MAX_PKT_BURST);
+	hyperv_scan_comps(hv, 0);
+
+	while (nb_rx < nb_pkts) {
+		/*
+		 * if there are no mbufs in sw_ring,
+		 * we need to trigger receive procedure
+		 */
+		if (rxq->rx_head == rxq->rx_tail) {
+			if (!hyperv_has_rx_work(hv))
+				break;
+
+			if (unlikely(!hyperv_get_buffer(hv, rxq->desc, PAGE_SIZE))) {
+				hyperv_scan_comps(hv, 0);
+				continue;
+			}
+		}
+
+		/*
+		 * Now the received data is in sw_ring of our rxq
+		 * we need to extract it and replace in sw_ring with new mbuf
+		 */
+		rx_mbuf = first_mbuf = rxq->sw_ring[rxq->rx_head];
+		segs = first_mbuf->nb_segs;
+		for (i = 0; i < segs; ++i) {
+			new_mb = hv_rxmbuf_alloc(rxq->mb_pool);
+			if (unlikely(!new_mb)) {
+				PMD_PERROR_LOG(hv, DBG_RX, "mbuf alloc fail");
+				++hv->stats.rx_nombuf;
+				return nb_rx;
+			}
+
+			rx_mbuf = rxq->sw_ring[rxq->rx_head];
+			rxq->sw_ring[rxq->rx_head] = new_mb;
+
+			if (++rxq->rx_head == rxq->nb_rx_desc)
+				rxq->rx_head = 0;
+
+			rx_mbuf->ol_flags |= PKT_RX_IPV4_HDR;
+			rx_mbuf->port = rxq->port_id;
+		}
+		rx_mbuf->next = NULL;
+
+		rx_pkts[nb_rx++] = first_mbuf;
+		++hv->stats.ipkts;
+		hv->stats.ibytes += first_mbuf->pkt_len;
+	}
+
+	return nb_rx;
+}
+
+static void hyperv_txeof(struct hv_tx_queue *txq)
+{
+	struct rte_mbuf *mb, *mb_next;
+
+	txq->tx_avail += txq->tx_free;
+	while (txq->tx_free) {
+		--txq->tx_free;
+		mb = txq->sw_ring[txq->tx_head];
+		while (mb) {
+			mb_next = mb->next;
+			rte_mempool_put(mb->pool, mb);
+			mb = mb_next;
+		}
+		if (++txq->tx_head == txq->nb_tx_desc)
+			txq->tx_head = 0;
+	}
+}
+
+uint16_t
+hyperv_xmit_pkts(void *ptxq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+	struct hv_tx_queue *txq = ptxq;
+	struct hv_data *hv = txq->hv;
+	struct netvsc_packet *packet;
+	struct rte_mbuf *m;
+	uint32_t data_pages;
+	uint64_t first_data_page;
+	uint32_t total_len;
+	uint32_t len;
+	uint16_t i, nb_tx;
+	uint8_t rndis_pages;
+	int ret;
+
+	if (unlikely(hv->closed))
+		return 0;
+
+	for (nb_tx = 0; nb_tx < nb_pkts; ++nb_tx) {
+		hyperv_scan_comps(hv, 0);
+		/* Determine if the descriptor ring needs to be cleaned. */
+		if (txq->tx_free > txq->tx_free_thresh)
+			hyperv_txeof(txq);
+
+		if (!txq->tx_avail) {
+			hyperv_scan_comps(hv, 1);
+			hyperv_txeof(txq);
+			if (!txq->tx_avail) {
+				PMD_PWARN_LOG(hv, DBG_TX, "No TX mbuf available");
+				break;
+			}
+		}
+		m = tx_pkts[nb_tx];
+		len = m->data_len;
+		total_len = m->pkt_len;
+		first_data_page = RTE_MBUF_DATA_DMA_ADDR(m) >> PAGE_SHIFT;
+		data_pages = ((RTE_MBUF_DATA_DMA_ADDR(m) + len - 1) >> PAGE_SHIFT) -
+			first_data_page + 1;
+
+		packet = txq->pkts[txq->tx_tail];
+		rndis_pages = packet->ext_pages;
+
+		txq->sw_ring[txq->tx_tail] = m;
+		packet->tot_data_buf_len = total_len;
+		packet->page_buffers[rndis_pages].pfn =
+			RTE_MBUF_DATA_DMA_ADDR(m) >> PAGE_SHIFT;
+		packet->page_buffers[rndis_pages].offset =
+			RTE_MBUF_DATA_DMA_ADDR(m) & (PAGE_SIZE - 1);
+		if (data_pages == 1)
+			packet->page_buffers[rndis_pages].length = len;
+		else
+			packet->page_buffers[rndis_pages].length = PAGE_SIZE -
+				packet->page_buffers[rndis_pages].offset;
+
+		for (i = 1; i < data_pages; ++i) {
+			packet->page_buffers[rndis_pages + i].pfn = first_data_page + i;
+			packet->page_buffers[rndis_pages + i].offset = 0;
+			packet->page_buffers[rndis_pages + i].length = PAGE_SIZE;
+		}
+		if (data_pages > 1)
+			packet->page_buffers[rndis_pages - 1 + data_pages].length =
+				((rte_pktmbuf_mtod(m, unsigned long) + len - 1)
+				 & (PAGE_SIZE - 1)) + 1;
+
+		uint16_t index = data_pages + rndis_pages;
+		for (i = 1; i < m->nb_segs; ++i) {
+			m = m->next;
+			len = m->data_len;
+			first_data_page = RTE_MBUF_DATA_DMA_ADDR(m) >> PAGE_SHIFT;
+			data_pages = ((RTE_MBUF_DATA_DMA_ADDR(m) + len - 1) >> PAGE_SHIFT) -
+				first_data_page + 1;
+			packet->page_buffers[index].pfn =
+				RTE_MBUF_DATA_DMA_ADDR(m) >> PAGE_SHIFT;
+			packet->page_buffers[index].offset =
+				rte_pktmbuf_mtod(m, unsigned long)
+				& (PAGE_SIZE - 1);
+			packet->page_buffers[index].length = m->data_len;
+			if (data_pages > 1) {
+				/* It can be 2 in case of usual mbuf_size=2048 */
+				packet->page_buffers[index].length = PAGE_SIZE -
+					packet->page_buffers[index].offset;
+				packet->page_buffers[++index].offset = 0;
+				packet->page_buffers[index].pfn =
+					packet->page_buffers[index - 1].pfn + 1;
+				packet->page_buffers[index].length =
+					m->data_len
+					- packet->page_buffers[index - 1].length;
+			}
+			++index;
+		}
+		packet->page_buf_count = index;
+
+		ret = hv_rf_on_send(hv, packet);
+		if (likely(ret == 0)) {
+			++hv->stats.opkts;
+			hv->stats.obytes += total_len;
+			if (++txq->tx_tail == txq->nb_tx_desc)
+				txq->tx_tail = 0;
+			--txq->tx_avail;
+		} else {
+			++hv->stats.oerrors;
+			PMD_PERROR_LOG(hv, DBG_TX, "TX ring buffer is busy");
+		}
+	}
+
+	return nb_tx;
+}
diff --git a/lib/librte_pmd_hyperv/hyperv_rxtx.h b/lib/librte_pmd_hyperv/hyperv_rxtx.h
new file mode 100644
index 0000000..c45a704
--- /dev/null
+++ b/lib/librte_pmd_hyperv/hyperv_rxtx.h
@@ -0,0 +1,35 @@ 
+/*-
+ *   Copyright(c) 2013-2015 Brocade Communications Systems, Inc.
+ *   All rights reserved.
+ */
+
+/**
+ * Structure associated with each TX queue.
+ */
+struct hv_tx_queue {
+	struct netvsc_packet    **pkts;
+	struct rte_mbuf         **sw_ring;
+	uint16_t                nb_tx_desc;
+	uint16_t                tx_avail;
+	uint16_t                tx_head;
+	uint16_t                tx_tail;
+	uint16_t                tx_free_thresh;
+	uint16_t                tx_free;
+	uint8_t                 port_id;
+	struct hv_data          *hv;
+} __rte_cache_aligned;
+
+/**
+ * Structure associated with each RX queue.
+ */
+struct hv_rx_queue {
+	struct rte_mempool      *mb_pool;
+	struct rte_mbuf         **sw_ring;
+	uint16_t                nb_rx_desc;
+	uint16_t                rx_head;
+	uint16_t                rx_tail;
+	uint16_t                rx_free_thresh;
+	uint8_t                 port_id;
+	struct hv_data          *hv;
+	struct hv_vm_packet_descriptor *desc;
+} __rte_cache_aligned;
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 95dbb0b..8012922 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -199,6 +199,10 @@  ifeq ($(CONFIG_RTE_LIBRTE_VIRTIO_PMD),y)
 LDLIBS += -lrte_pmd_virtio_uio
 endif
 
+ifeq ($(CONFIG_RTE_LIBRTE_HV_PMD),y)
+LDLIBS += -lrte_pmd_hyperv
+endif
+
 ifeq ($(CONFIG_RTE_LIBRTE_VHOST), y)
 LDLIBS += -lrte_vhost
 endif