Add native NETMAP driver

This is first drop of native NETMAP driver.
It is mainly tested with NETMAP pipes but also
support for native interfaces should work.

New CLI:
create netmap [<intf name>|valeXXX:YYY] [hw-addr <mac>] [pipe]
[master|slave]

Following example creates NETMAP pipe where VPP acts as master:

 create netmap name vale00:vpp1 pipe master

then NETMAP pkt-gen tool can be used to send traffic:

 pkt-gen -i vale00:vpp1}0  -f tx

Change-Id: Ie0ddaa5facc75285b78467420e8a9f9c8dfc39e5
Signed-off-by: Damjan Marion <damarion@cisco.com>

10 files changed, 1666 insertions, 5 deletions

diff --git a/vnet/Makefile.am b/vnet/Makefile.am
index f7c1f30b..5fdffcaa 100644
--- a/vnet/Makefile.am
+++ b/vnet/Makefile.am
@@ -684,6 +684,20 @@ nobase_include_HEADERS +=			\
   vnet/devices/af_packet/af_packet.h
 
 ########################################
+# NETMAP interface
+########################################
+
+libvnet_la_SOURCES +=				\
+  vnet/devices/netmap/netmap.c			\
+  vnet/devices/netmap/device.c			\
+  vnet/devices/netmap/node.c			\
+  vnet/devices/netmap/cli.c
+
+nobase_include_HEADERS +=			\
+  vnet/devices/netmap/netmap.h
+
+
+########################################
 # Unix kernel related
 ########################################
 
diff --git a/vnet/vnet/devices/dpdk/threads.c b/vnet/vnet/devices/dpdk/threads.c
index b1f13ef3..eeb440e2 100644
--- a/vnet/vnet/devices/dpdk/threads.c
+++ b/vnet/vnet/devices/dpdk/threads.c
@@ -20,6 +20,7 @@
 
 #include <vnet/ethernet/ethernet.h>
 #include <vnet/devices/dpdk/dpdk.h>
+#include <vnet/devices/dpdk/threads.h>
 
 #include <vlibmemory/api.h>
 #include <vlibmemory/vl_memory_msg_enum.h> /* enumerate all vlib messages */
diff --git a/vnet/vnet/devices/netmap/cli.c b/vnet/vnet/devices/netmap/cli.c
new file mode 100644
index 00000000..9c8fb783
--- /dev/null
+++ b/vnet/vnet/devices/netmap/cli.c
@@ -0,0 +1,121 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/netmap/netmap.h>
+
+static clib_error_t *
+netmap_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			     vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, * line_input = &_line_input;
+  u8 * host_if_name = NULL;
+  u8 hwaddr [6];
+  u8 * hw_addr_ptr = 0;
+  int r;
+  u8 is_pipe = 0;
+  u8 is_master = 0;
+
+  /* Get a line of input. */
+  if (! unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "name %s", &host_if_name))
+	;
+      else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address, hwaddr))
+	hw_addr_ptr = hwaddr;
+      else if (unformat (line_input, "pipe"))
+	is_pipe = 1;
+      else if (unformat (line_input, "master"))
+	is_master = 1;
+      else if (unformat (line_input, "slave"))
+	is_master = 0;
+      else
+	return clib_error_return (0, "unknown input `%U'", format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  if (host_if_name == NULL)
+      return clib_error_return (0, "missing host interface name");
+
+  r = netmap_create_if(vm, host_if_name, hw_addr_ptr, is_pipe, is_master);
+
+  if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
+    return clib_error_return(0, "%s (errno %d)", strerror (errno), errno);
+
+  if (r == VNET_API_ERROR_INVALID_INTERFACE)
+    return clib_error_return(0, "Invalid interface name");
+
+  if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
+    return clib_error_return(0, "Interface elready exists");
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (netmap_create_command, static) = {
+  .path = "create netmap",
+  .short_help = "create netmap name [<intf name>|valeXXX:YYY] "
+    "[hw-addr <mac>] [pipe] [master|slave]",
+  .function = netmap_create_command_fn,
+};
+
+static clib_error_t *
+netmap_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
+                             vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, * line_input = &_line_input;
+  u8 * host_if_name = NULL;
+
+  /* Get a line of input. */
+  if (! unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "name %s", &host_if_name))
+        ;
+      else
+        return clib_error_return (0, "unknown input `%U'", format_unformat_error, input);
+    }
+  unformat_free (line_input);
+
+  if (host_if_name == NULL)
+      return clib_error_return (0, "missing host interface name");
+
+  netmap_delete_if(vm, host_if_name);
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (netmap_delete_command, static) = {
+  .path = "delete netmap",
+  .short_help = "delete netmap name <interface name>",
+  .function = netmap_delete_command_fn,
+};
+
+clib_error_t *
+netmap_cli_init (vlib_main_t * vm)
+{
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (netmap_cli_init);
diff --git a/vnet/vnet/devices/netmap/device.c b/vnet/vnet/devices/netmap/device.c
new file mode 100644
index 00000000..36e17da2
--- /dev/null
+++ b/vnet/vnet/devices/netmap/device.c
@@ -0,0 +1,221 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/netmap/netmap.h>
+
+#define foreach_netmap_tx_func_error	       \
+_(NO_FREE_SLOTS, "no free tx slots")
+
+typedef enum {
+#define _(f,s) NETMAP_TX_ERROR_##f,
+  foreach_netmap_tx_func_error
+#undef _
+  NETMAP_TX_N_ERROR,
+} netmap_tx_func_error_t;
+
+static char * netmap_tx_func_error_strings[] = {
+#define _(n,s) s,
+    foreach_netmap_tx_func_error
+#undef _
+};
+
+
+static u8 * format_netmap_device_name (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  netmap_main_t * apm = &netmap_main;
+  netmap_if_t * nif = pool_elt_at_index (apm->interfaces, i);
+
+  s = format (s, "netmap-%s", nif->host_if_name);
+  return s;
+}
+
+static u8 * format_netmap_device (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  int verbose = va_arg (*args, int);
+  netmap_main_t * nm = &netmap_main;
+  netmap_if_t * nif = vec_elt_at_index (nm->interfaces, dev_instance);
+  uword indent = format_get_indent (s);
+
+  s = format (s, "NETMAP interface");
+  if (verbose)
+    {
+      s = format (s, "\n%U version %d flags 0x%x"
+		  "\n%U region %u memsize 0x%x offset 0x%x"
+		  "\n%U tx_slots %u rx_slots %u tx_rings %u rx_rings %u",
+		  format_white_space, indent + 2,
+		  nif->req->nr_version,
+		  nif->req->nr_flags,
+		  format_white_space, indent + 2,
+		  nif->mem_region,
+		  nif->req->nr_memsize,
+		  nif->req->nr_offset,
+		  format_white_space, indent + 2,
+		  nif->req->nr_tx_slots,
+		  nif->req->nr_rx_slots,
+		  nif->req->nr_tx_rings,
+		  nif->req->nr_rx_rings);
+    }
+  return s;
+}
+
+static u8 * format_netmap_tx_trace (u8 * s, va_list * args)
+{
+  s = format (s, "Unimplemented...");
+  return s;
+}
+
+static uword
+netmap_interface_tx (vlib_main_t * vm,
+		       vlib_node_runtime_t * node,
+		       vlib_frame_t * frame)
+{
+  netmap_main_t * nm = &netmap_main;
+  u32 * buffers = vlib_frame_args (frame);
+  u32 n_left = frame->n_vectors;
+  vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
+  netmap_if_t * nif = pool_elt_at_index (nm->interfaces, rd->dev_instance);
+  int cur_ring;
+
+  cur_ring = nif->first_tx_ring;
+
+  while(n_left && cur_ring <= nif->last_tx_ring)
+    {
+      struct netmap_ring * ring = NETMAP_TXRING(nif->nifp, cur_ring);
+      int n_free_slots = nm_ring_space(ring);
+      uint cur = ring->cur;
+
+      if (!n_free_slots)
+	{
+	  cur_ring++;
+	  continue;
+	}
+
+      while (n_left && n_free_slots)
+	{
+	  vlib_buffer_t * b0;
+	  u32 bi = buffers[0];
+	  u32 len;
+	  u32 offset = 0;
+	  buffers++;
+
+	  struct netmap_slot * slot = &ring->slot[cur];
+
+	  do
+	    {
+	      b0 = vlib_get_buffer (vm, bi);
+	      len = b0->current_length;
+	      /* memcpy */
+	      clib_memcpy ((u8 *) NETMAP_BUF(ring, slot->buf_idx) + offset,
+		      vlib_buffer_get_current(b0), len);
+	      offset += len;
+	    }
+          while ((bi = b0->next_buffer));
+
+	  slot->len = offset;
+	  cur = (cur + 1) % ring->num_slots;
+	  n_free_slots--;
+          n_left--;
+	}
+      CLIB_MEMORY_BARRIER();
+      ring->head = ring->cur = cur;
+    }
+
+  if (n_left < frame->n_vectors)
+      ioctl(nif->fd, NIOCTXSYNC, NULL);
+
+  if (n_left)
+    vlib_error_count (vm, node->node_index, NETMAP_TX_ERROR_NO_FREE_SLOTS,
+		      n_left);
+
+  vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
+  return frame->n_vectors;
+}
+
+static void
+netmap_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
+				  u32 node_index)
+{
+  netmap_main_t * apm = &netmap_main;
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+  netmap_if_t * nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
+
+  /* Shut off redirection */
+  if (node_index == ~0)
+    {
+      nif->per_interface_next_index = node_index;
+      return;
+    }
+
+  nif->per_interface_next_index =
+    vlib_node_add_next (vlib_get_main(), netmap_input_node.index, node_index);
+}
+
+static void netmap_clear_hw_interface_counters (u32 instance)
+{
+  /* Nothing for now */
+}
+
+static clib_error_t *
+netmap_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+  netmap_main_t * apm = &netmap_main;
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+  netmap_if_t * nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
+  u32 hw_flags;
+
+  nif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+  if (nif->is_admin_up)
+    hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
+  else
+    hw_flags = 0;
+
+  vnet_hw_interface_set_flags(vnm, hw_if_index, hw_flags);
+
+  return 0;
+}
+
+static clib_error_t *
+netmap_subif_add_del_function (vnet_main_t * vnm,
+				 u32 hw_if_index,
+				 struct vnet_sw_interface_t * st,
+				 int is_add)
+{
+  /* Nothing for now */
+  return 0;
+}
+
+VNET_DEVICE_CLASS (netmap_device_class) = {
+  .name = "netmap",
+  .tx_function = netmap_interface_tx,
+  .format_device_name = format_netmap_device_name,
+  .format_device = format_netmap_device,
+  .format_tx_trace = format_netmap_tx_trace,
+  .tx_function_n_errors = NETMAP_TX_N_ERROR,
+  .tx_function_error_strings = netmap_tx_func_error_strings,
+  .rx_redirect_to_node = netmap_set_interface_next_node,
+  .clear_counters = netmap_clear_hw_interface_counters,
+  .admin_up_down_function = netmap_interface_admin_up_down,
+  .subif_add_del_function = netmap_subif_add_del_function,
+  .no_flatten_output_chains = 1,
+};
diff --git a/vnet/vnet/devices/netmap/net_netmap.h b/vnet/vnet/devices/netmap/net_netmap.h
new file mode 100644
index 00000000..fd4253b7
--- /dev/null
+++ b/vnet/vnet/devices/netmap/net_netmap.h
@@ -0,0 +1,650 @@
+/*
+ * Copyright (C) 2011-2014 Matteo Landi, Luigi Rizzo. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``S 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 OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * $FreeBSD: head/sys/net/netmap.h 251139 2013-05-30 14:07:14Z luigi $
+ *
+ * Definitions of constants and the structures used by the netmap
+ * framework, for the part visible to both kernel and userspace.
+ * Detailed info on netmap is available with "man netmap" or at
+ *
+ *	http://info.iet.unipi.it/~luigi/netmap/
+ *
+ * This API is also used to communicate with the VALE software switch
+ */
+
+#ifndef _NET_NETMAP_H_
+#define _NET_NETMAP_H_
+
+#define	NETMAP_API	11		/* current API version */
+
+#define	NETMAP_MIN_API	11		/* min and max versions accepted */
+#define	NETMAP_MAX_API	15
+/*
+ * Some fields should be cache-aligned to reduce contention.
+ * The alignment is architecture and OS dependent, but rather than
+ * digging into OS headers to find the exact value we use an estimate
+ * that should cover most architectures.
+ */
+#define NM_CACHE_ALIGN	128
+
+/*
+ * --- Netmap data structures ---
+ *
+ * The userspace data structures used by netmap are shown below.
+ * They are allocated by the kernel and mmap()ed by userspace threads.
+ * Pointers are implemented as memory offsets or indexes,
+ * so that they can be easily dereferenced in kernel and userspace.
+
+   KERNEL (opaque, obviously)
+
+  ====================================================================
+                                         |
+   USERSPACE                             |      struct netmap_ring
+                                         +---->+---------------+
+                                             / | head,cur,tail |
+   struct netmap_if (nifp, 1 per fd)        /  | buf_ofs       |
+    +---------------+                      /   | other fields  |
+    | ni_tx_rings   |                     /    +===============+
+    | ni_rx_rings   |                    /     | buf_idx, len  | slot[0]
+    |               |                   /      | flags, ptr    |
+    |               |                  /       +---------------+
+    +===============+                 /        | buf_idx, len  | slot[1]
+    | txring_ofs[0] | (rel.to nifp)--'         | flags, ptr    |
+    | txring_ofs[1] |                          +---------------+
+     (tx+1 entries)                           (num_slots entries)
+    | txring_ofs[t] |                          | buf_idx, len  | slot[n-1]
+    +---------------+                          | flags, ptr    |
+    | rxring_ofs[0] |                          +---------------+
+    | rxring_ofs[1] |
+     (rx+1 entries)
+    | rxring_ofs[r] |
+    +---------------+
+
+ * For each "interface" (NIC, host stack, PIPE, VALE switch port) bound to
+ * a file descriptor, the mmap()ed region contains a (logically readonly)
+ * struct netmap_if pointing to struct netmap_ring's.
+ *
+ * There is one netmap_ring per physical NIC ring, plus one tx/rx ring
+ * pair attached to the host stack (this pair is unused for non-NIC ports).
+ *
+ * All physical/host stack ports share the same memory region,
+ * so that zero-copy can be implemented between them.
+ * VALE switch ports instead have separate memory regions.
+ *
+ * The netmap_ring is the userspace-visible replica of the NIC ring.
+ * Each slot has the index of a buffer (MTU-sized and residing in the
+ * mmapped region), its length and some flags. An extra 64-bit pointer
+ * is provided for user-supplied buffers in the tx path.
+ *
+ * In user space, the buffer address is computed as
+ *	(char *)ring + buf_ofs + index * NETMAP_BUF_SIZE
+ *
+ * Added in NETMAP_API 11:
+ *
+ * + NIOCREGIF can request the allocation of extra spare buffers from
+ *   the same memory pool. The desired number of buffers must be in
+ *   nr_arg3. The ioctl may return fewer buffers, depending on memory
+ *   availability. nr_arg3 will return the actual value, and, once
+ *   mapped, nifp->ni_bufs_head will be the index of the first buffer.
+ *
+ *   The buffers are linked to each other using the first uint32_t
+ *   as the index. On close, ni_bufs_head must point to the list of
+ *   buffers to be released.
+ *
+ * + NIOCREGIF can request space for extra rings (and buffers)
+ *   allocated in the same memory space. The number of extra rings
+ *   is in nr_arg1, and is advisory. This is a no-op on NICs where
+ *   the size of the memory space is fixed.
+ *
+ * + NIOCREGIF can attach to PIPE rings sharing the same memory
+ *   space with a parent device. The ifname indicates the parent device,
+ *   which must already exist. Flags in nr_flags indicate if we want to
+ *   bind the master or slave side, the index (from nr_ringid)
+ *   is just a cookie and does not need to be sequential.
+ *
+ * + NIOCREGIF can also attach to 'monitor' rings that replicate
+ *   the content of specific rings, also from the same memory space.
+ *
+ *   Extra flags in nr_flags support the above functions.
+ *   Application libraries may use the following naming scheme:
+ *	netmap:foo			all NIC ring pairs
+ *	netmap:foo^			only host ring pair
+ *	netmap:foo+			all NIC ring + host ring pairs
+ *	netmap:foo-k			the k-th NIC ring pair
+ *	netmap:foo{k			PIPE ring pair k, master side
+ *	netmap:foo}k			PIPE ring pair k, slave side
+ */
+
+/*
+ * struct netmap_slot is a buffer descriptor
+ */
+struct netmap_slot {
+	uint32_t buf_idx;	/* buffer index */
+	uint16_t len;		/* length for this slot */
+	uint16_t flags;		/* buf changed, etc. */
+	uint64_t ptr;		/* pointer for indirect buffers */
+};
+
+/*
+ * The following flags control how the slot is used
+ */
+
+#define	NS_BUF_CHANGED	0x0001	/* buf_idx changed */
+	/*
+	 * must be set whenever buf_idx is changed (as it might be
+	 * necessary to recompute the physical address and mapping)
+	 *
+	 * It is also set by the kernel whenever the buf_idx is
+	 * changed internally (e.g., by pipes). Applications may
+	 * use this information to know when they can reuse the
+	 * contents of previously prepared buffers.
+	 */
+
+#define	NS_REPORT	0x0002	/* ask the hardware to report results */
+	/*
+	 * Request notification when slot is used by the hardware.
+	 * Normally transmit completions are handled lazily and
+	 * may be unreported. This flag lets us know when a slot
+	 * has been sent (e.g. to terminate the sender).
+	 */
+
+#define	NS_FORWARD	0x0004	/* pass packet 'forward' */
+	/*
+	 * (Only for physical ports, rx rings with NR_FORWARD set).
+	 * Slot released to the kernel (i.e. before ring->head) with
+	 * this flag set are passed to the peer ring (host/NIC),
+	 * thus restoring the host-NIC connection for these slots.
+	 * This supports efficient traffic monitoring or firewalling.
+	 */
+
+#define	NS_NO_LEARN	0x0008	/* disable bridge learning */
+ 	/*
+	 * On a VALE switch, do not 'learn' the source port for
+ 	 * this buffer.
+	 */
+
+#define	NS_INDIRECT	0x0010	/* userspace buffer */
+ 	/*
+	 * (VALE tx rings only) data is in a userspace buffer,
+	 * whose address is in the 'ptr' field in the slot.
+	 */
+
+#define	NS_MOREFRAG	0x0020	/* packet has more fragments */
+ 	/*
+	 * (VALE ports only)
+	 * Set on all but the last slot of a multi-segment packet.
+	 * The 'len' field refers to the individual fragment.
+	 */
+
+#define	NS_PORT_SHIFT	8
+#define	NS_PORT_MASK	(0xff << NS_PORT_SHIFT)
+	/*
+ 	 * The high 8 bits of the flag, if not zero, indicate the
+	 * destination port for the VALE switch, overriding
+ 	 * the lookup table.
+ 	 */
+
+#define	NS_RFRAGS(_slot)	( ((_slot)->flags >> 8) & 0xff)
+	/*
+	 * (VALE rx rings only) the high 8 bits
+	 *  are the number of fragments.
+	 */
+
+
+/*
+ * struct netmap_ring
+ *
+ * Netmap representation of a TX or RX ring (also known as "queue").
+ * This is a queue implemented as a fixed-size circular array.
+ * At the software level the important fields are: head, cur, tail.
+ *
+ * In TX rings:
+ *
+ *	head	first slot available for transmission.
+ *	cur	wakeup point. select() and poll() will unblock
+ *		when 'tail' moves past 'cur'
+ *	tail	(readonly) first slot reserved to the kernel
+ *
+ *	[head .. tail-1] can be used for new packets to send;
+ *	'head' and 'cur' must be incremented as slots are filled
+ *	    with new packets to be sent;
+ *	'cur' can be moved further ahead if we need more space
+ *	for new transmissions. XXX todo (2014-03-12)
+ *
+ * In RX rings:
+ *
+ *	head	first valid received packet
+ *	cur	wakeup point. select() and poll() will unblock
+ *		when 'tail' moves past 'cur'
+ *	tail	(readonly) first slot reserved to the kernel
+ *
+ *	[head .. tail-1] contain received packets;
+ *	'head' and 'cur' must be incremented as slots are consumed
+ *		and can be returned to the kernel;
+ *	'cur' can be moved further ahead if we want to wait for
+ *		new packets without returning the previous ones.
+ *
+ * DATA OWNERSHIP/LOCKING:
+ *	The netmap_ring, and all slots and buffers in the range
+ *	[head .. tail-1] are owned by the user program;
+ *	the kernel only accesses them during a netmap system call
+ *	and in the user thread context.
+ *
+ *	Other slots and buffers are reserved for use by the kernel
+ */
+struct netmap_ring {
+	/*
+	 * buf_ofs is meant to be used through macros.
+	 * It contains the offset of the buffer region from this
+	 * descriptor.
+	 */
+	const int64_t	buf_ofs;
+	const uint32_t	num_slots;	/* number of slots in the ring. */
+	const uint32_t	nr_buf_size;
+	const uint16_t	ringid;
+	const uint16_t	dir;		/* 0: tx, 1: rx */
+
+	uint32_t        head;		/* (u) first user slot */
+	uint32_t        cur;		/* (u) wakeup point */
+	uint32_t	tail;		/* (k) first kernel slot */
+
+	uint32_t	flags;
+
+	struct timeval	ts;		/* (k) time of last *sync() */
+
+	/* opaque room for a mutex or similar object */
+#if !defined(_WIN32) || defined(__CYGWIN__)
+	uint8_t	__attribute__((__aligned__(NM_CACHE_ALIGN))) sem[128];
+#else
+	uint8_t	__declspec(align(NM_CACHE_ALIGN)) sem[128];
+#endif
+
+	/* the slots follow. This struct has variable size */
+	struct netmap_slot slot[0];	/* array of slots. */
+};
+
+
+/*
+ * RING FLAGS
+ */
+#define	NR_TIMESTAMP	0x0002		/* set timestamp on *sync() */
+	/*
+	 * updates the 'ts' field on each netmap syscall. This saves
+	 * saves a separate gettimeofday(), and is not much worse than
+	 * software timestamps generated in the interrupt handler.
+	 */
+
+#define	NR_FORWARD	0x0004		/* enable NS_FORWARD for ring */
+ 	/*
+	 * Enables the NS_FORWARD slot flag for the ring.
+	 */
+
+
+/*
+ * Netmap representation of an interface and its queue(s).
+ * This is initialized by the kernel when binding a file
+ * descriptor to a port, and should be considered as readonly
+ * by user programs. The kernel never uses it.
+ *
+ * There is one netmap_if for each file descriptor on which we want
+ * to select/poll.
+ * select/poll operates on one or all pairs depending on the value of
+ * nmr_queueid passed on the ioctl.
+ */
+struct netmap_if {
+	char		ni_name[IFNAMSIZ]; /* name of the interface. */
+	const uint32_t	ni_version;	/* API version, currently unused */
+	const uint32_t	ni_flags;	/* properties */
+#define	NI_PRIV_MEM	0x1		/* private memory region */
+
+	/*
+	 * The number of packet rings available in netmap mode.
+	 * Physical NICs can have different numbers of tx and rx rings.
+	 * Physical NICs also have a 'host' ring pair.
+	 * Additionally, clients can request additional ring pairs to
+	 * be used for internal communication.
+	 */
+	const uint32_t	ni_tx_rings;	/* number of HW tx rings */
+	const uint32_t	ni_rx_rings;	/* number of HW rx rings */
+
+	uint32_t	ni_bufs_head;	/* head index for extra bufs */
+	uint32_t	ni_spare1[5];
+	/*
+	 * The following array contains the offset of each netmap ring
+	 * from this structure, in the following order:
+	 * NIC tx rings (ni_tx_rings); host tx ring (1); extra tx rings;
+	 * NIC rx rings (ni_rx_rings); host tx ring (1); extra rx rings.
+	 *
+	 * The area is filled up by the kernel on NIOCREGIF,
+	 * and then only read by userspace code.
+	 */
+	const ssize_t	ring_ofs[0];
+};
+
+
+#ifndef NIOCREGIF
+/*
+ * ioctl names and related fields
+ *
+ * NIOCTXSYNC, NIOCRXSYNC synchronize tx or rx queues,
+ *	whose identity is set in NIOCREGIF through nr_ringid.
+ *	These are non blocking and take no argument.
+ *
+ * NIOCGINFO takes a struct ifreq, the interface name is the input,
+ *	the outputs are number of queues and number of descriptor
+ *	for each queue (useful to set number of threads etc.).
+ *	The info returned is only advisory and may change before
+ *	the interface is bound to a file descriptor.
+ *
+ * NIOCREGIF takes an interface name within a struct nmre,
+ *	and activates netmap mode on the interface (if possible).
+ *
+ * The argument to NIOCGINFO/NIOCREGIF overlays struct ifreq so we
+ * can pass it down to other NIC-related ioctls.
+ *
+ * The actual argument (struct nmreq) has a number of options to request
+ * different functions.
+ * The following are used in NIOCREGIF when nr_cmd == 0:
+ *
+ * nr_name	(in)
+ *	The name of the port (em0, valeXXX:YYY, etc.)
+ *	limited to IFNAMSIZ for backward compatibility.
+ *
+ * nr_version	(in/out)
+ *	Must match NETMAP_API as used in the kernel, error otherwise.
+ *	Always returns the desired value on output.
+ *
+ * nr_tx_slots, nr_tx_slots, nr_tx_rings, nr_rx_rings (in/out)
+ *	On input, non-zero values may be used to reconfigure the port
+ *	according to the requested values, but this is not guaranteed.
+ *	On output the actual values in use are reported.
+ *
+ * nr_ringid (in)
+ *	Indicates how rings should be bound to the file descriptors.
+ *	If nr_flags != 0, then the low bits (in NETMAP_RING_MASK)
+ *	are used to indicate the ring number, and nr_flags specifies
+ *	the actual rings to bind. NETMAP_NO_TX_POLL is unaffected.
+ *
+ *	NOTE: THE FOLLOWING (nr_flags == 0) IS DEPRECATED:
+ *	If nr_flags == 0, NETMAP_HW_RING and NETMAP_SW_RING control
+ *	the binding as follows:
+ *	0 (default)			binds all physical rings
+ *	NETMAP_HW_RING | ring number	binds a single ring pair
+ *	NETMAP_SW_RING			binds only the host tx/rx rings
+ *
+ *	NETMAP_NO_TX_POLL can be OR-ed to make select()/poll() push
+ *		packets on tx rings only if POLLOUT is set.
+ *		The default is to push any pending packet.
+ *
+ *	NETMAP_DO_RX_POLL can be OR-ed to make select()/poll() release
+ *		packets on rx rings also when POLLIN is NOT set.
+ *		The default is to touch the rx ring only with POLLIN.
+ *		Note that this is the opposite of TX because it
+ *		reflects the common usage.
+ *
+ *	NOTE: NETMAP_PRIV_MEM IS DEPRECATED, use nr_arg2 instead.
+ *	NETMAP_PRIV_MEM is set on return for ports that do not use
+ *		the global memory allocator.
+ *		This information is not significant and applications
+ *		should look at the region id in nr_arg2
+ *
+ * nr_flags	is the recommended mode to indicate which rings should
+ *		be bound to a file descriptor. Values are NR_REG_*
+ *
+ * nr_arg1 (in)	The number of extra rings to be reserved.
+ *		Especially when allocating a VALE port the system only
+ *		allocates the amount of memory needed for the port.
+ *		If more shared memory rings are desired (e.g. for pipes),
+ *		the first invocation for the same basename/allocator
+ *		should specify a suitable number. Memory cannot be
+ *		extended after the first allocation without closing
+ *		all ports on the same region.
+ *
+ * nr_arg2 (in/out) The identity of the memory region used.
+ *		On input, 0 means the system decides autonomously,
+ *		other values may try to select a specific region.
+ *		On return the actual value is reported.
+ *		Region '1' is the global allocator, normally shared
+ *		by all interfaces. Other values are private regions.
+ *		If two ports the same region zero-copy is possible.
+ *
+ * nr_arg3 (in/out)	number of extra buffers to be allocated.
+ *
+ *
+ *
+ * nr_cmd (in)	if non-zero indicates a special command:
+ *	NETMAP_BDG_ATTACH	 and nr_name = vale*:ifname
+ *		attaches the NIC to the switch; nr_ringid specifies
+ *		which rings to use. Used by vale-ctl -a ...
+ *	    nr_arg1 = NETMAP_BDG_HOST also attaches the host port
+ *		as in vale-ctl -h ...
+ *
+ *	NETMAP_BDG_DETACH	and nr_name = vale*:ifname
+ *		disconnects a previously attached NIC.
+ *		Used by vale-ctl -d ...
+ *
+ *	NETMAP_BDG_LIST
+ *		list the configuration of VALE switches.
+ *
+ *	NETMAP_BDG_VNET_HDR
+ *		Set the virtio-net header length used by the client
+ *		of a VALE switch port.
+ *
+ *	NETMAP_BDG_NEWIF
+ *		create a persistent VALE port with name nr_name.
+ *		Used by vale-ctl -n ...
+ *
+ *	NETMAP_BDG_DELIF
+ *		delete a persistent VALE port. Used by vale-ctl -d ...
+ *
+ * nr_arg1, nr_arg2, nr_arg3  (in/out)		command specific
+ *
+ *
+ *
+ */
+
+
+/*
+ * struct nmreq overlays a struct ifreq (just the name)
+ */
+struct nmreq {
+	char		nr_name[IFNAMSIZ];
+	uint32_t	nr_version;	/* API version */
+	uint32_t	nr_offset;	/* nifp offset in the shared region */
+	uint32_t	nr_memsize;	/* size of the shared region */
+	uint32_t	nr_tx_slots;	/* slots in tx rings */
+	uint32_t	nr_rx_slots;	/* slots in rx rings */
+	uint16_t	nr_tx_rings;	/* number of tx rings */
+	uint16_t	nr_rx_rings;	/* number of rx rings */
+
+	uint16_t	nr_ringid;	/* ring(s) we care about */
+#define NETMAP_HW_RING		0x4000	/* single NIC ring pair */
+#define NETMAP_SW_RING		0x2000	/* only host ring pair */
+
+#define NETMAP_RING_MASK	0x0fff	/* the ring number */
+
+#define NETMAP_NO_TX_POLL	0x1000	/* no automatic txsync on poll */
+
+#define NETMAP_DO_RX_POLL	0x8000	/* DO automatic rxsync on poll */
+
+	uint16_t	nr_cmd;
+#define NETMAP_BDG_ATTACH	1	/* attach the NIC */
+#define NETMAP_BDG_DETACH	2	/* detach the NIC */
+#define NETMAP_BDG_REGOPS	3	/* register bridge callbacks */
+#define NETMAP_BDG_LIST		4	/* get bridge's info */
+#define NETMAP_BDG_VNET_HDR     5       /* set the port virtio-net-hdr length */
+#define NETMAP_BDG_OFFSET	NETMAP_BDG_VNET_HDR	/* deprecated alias */
+#define NETMAP_BDG_NEWIF	6	/* create a virtual port */
+#define NETMAP_BDG_DELIF	7	/* destroy a virtual port */
+#define NETMAP_PT_HOST_CREATE	8	/* create ptnetmap kthreads */
+#define NETMAP_PT_HOST_DELETE	9	/* delete ptnetmap kthreads */
+#define NETMAP_BDG_POLLING_ON	10	/* delete polling kthread */
+#define NETMAP_BDG_POLLING_OFF	11	/* delete polling kthread */
+#define NETMAP_VNET_HDR_GET	12      /* get the port virtio-net-hdr length */
+	uint16_t	nr_arg1;	/* reserve extra rings in NIOCREGIF */
+#define NETMAP_BDG_HOST		1	/* attach the host stack on ATTACH */
+
+	uint16_t	nr_arg2;
+	uint32_t	nr_arg3;	/* req. extra buffers in NIOCREGIF */
+	uint32_t	nr_flags;
+	/* various modes, extends nr_ringid */
+	uint32_t	spare2[1];
+};
+
+#define NR_REG_MASK		0xf /* values for nr_flags */
+enum {	NR_REG_DEFAULT	= 0,	/* backward compat, should not be used. */
+	NR_REG_ALL_NIC	= 1,
+	NR_REG_SW	= 2,
+	NR_REG_NIC_SW	= 3,
+	NR_REG_ONE_NIC	= 4,
+	NR_REG_PIPE_MASTER = 5,
+	NR_REG_PIPE_SLAVE = 6,
+};
+/* monitor uses the NR_REG to select the rings to monitor */
+#define NR_MONITOR_TX	0x100
+#define NR_MONITOR_RX	0x200
+#define NR_ZCOPY_MON	0x400
+/* request exclusive access to the selected rings */
+#define NR_EXCLUSIVE	0x800
+/* request ptnetmap host support */
+#define NR_PASSTHROUGH_HOST	NR_PTNETMAP_HOST /* deprecated */
+#define NR_PTNETMAP_HOST	0x1000
+#define NR_RX_RINGS_ONLY	0x2000
+#define NR_TX_RINGS_ONLY	0x4000
+/* Applications set this flag if they are able to deal with virtio-net headers,
+ * that is send/receive frames that start with a virtio-net header.
+ * If not set, NIOCREGIF will fail with netmap ports that require applications
+ * to use those headers. If the flag is set, the application can use the
+ * NETMAP_VNET_HDR_GET command to figure out the header length. */
+#define NR_ACCEPT_VNET_HDR	0x8000
+
+
+/*
+ * Windows does not have _IOWR(). _IO(), _IOW() and _IOR() are defined
+ * in ws2def.h but not sure if they are in the form we need.
+ * XXX so we redefine them
+ * in a convenient way to use for DeviceIoControl signatures
+ */
+#ifdef _WIN32
+#undef _IO	// ws2def.h
+#define _WIN_NM_IOCTL_TYPE 40000
+#define _IO(_c, _n)	CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
+		METHOD_BUFFERED, FILE_ANY_ACCESS  )
+#define _IO_direct(_c, _n)	CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
+		METHOD_OUT_DIRECT, FILE_ANY_ACCESS  )
+
+#define _IOWR(_c, _n, _s)	_IO(_c, _n)
+
+/* We havesome internal sysctl in addition to the externally visible ones */
+#define NETMAP_MMAP _IO_direct('i', 160)	// note METHOD_OUT_DIRECT
+#define NETMAP_POLL _IO('i', 162)
+
+/* and also two setsockopt for sysctl emulation */
+#define NETMAP_SETSOCKOPT _IO('i', 140)
+#define NETMAP_GETSOCKOPT _IO('i', 141)
+
+
+//These linknames are for the Netmap Core Driver
+#define NETMAP_NT_DEVICE_NAME			L"\\Device\\NETMAP"
+#define NETMAP_DOS_DEVICE_NAME			L"\\DosDevices\\netmap"
+
+//Definition of a structure used to pass a virtual address within an IOCTL
+typedef struct _MEMORY_ENTRY {
+	PVOID       pUsermodeVirtualAddress;
+} MEMORY_ENTRY, *PMEMORY_ENTRY;
+
+typedef struct _POLL_REQUEST_DATA {
+	int events;
+	int timeout;
+	int revents;
+} POLL_REQUEST_DATA;
+
+#endif /* _WIN32 */
+
+/*
+ * FreeBSD uses the size value embedded in the _IOWR to determine
+ * how much to copy in/out. So we need it to match the actual
+ * data structure we pass. We put some spares in the structure
+ * to ease compatibility with other versions
+ */
+#define NIOCGINFO	_IOWR('i', 145, struct nmreq) /* return IF info */
+#define NIOCREGIF	_IOWR('i', 146, struct nmreq) /* interface register */
+#define NIOCTXSYNC	_IO('i', 148) /* sync tx queues */
+#define NIOCRXSYNC	_IO('i', 149) /* sync rx queues */
+#define NIOCCONFIG	_IOWR('i',150, struct nm_ifreq) /* for ext. modules */
+#endif /* !NIOCREGIF */
+
+
+/*
+ * Helper functions for kernel and userspace
+ */
+
+/*
+ * check if space is available in the ring.
+ */
+static inline int
+nm_ring_empty(struct netmap_ring *ring)
+{
+	return (ring->cur == ring->tail);
+}
+
+/*
+ * Opaque structure that is passed to an external kernel
+ * module via ioctl(fd, NIOCCONFIG, req) for a user-owned
+ * bridge port (at this point ephemeral VALE interface).
+ */
+#define NM_IFRDATA_LEN 256
+struct nm_ifreq {
+	char nifr_name[IFNAMSIZ];
+	char data[NM_IFRDATA_LEN];
+};
+
+/*
+ * netmap kernel thread configuration
+ */
+/* bhyve/vmm.ko MSIX parameters for IOCTL */
+struct ptn_vmm_ioctl_msix {
+	uint64_t        msg;
+	uint64_t        addr;
+};
+
+/* IOCTL parameters */
+struct nm_kth_ioctl {
+	u_long				com;
+	/* TODO: use union */
+	union {
+		struct ptn_vmm_ioctl_msix msix;
+	} data;
+};
+
+/* Configuration of a ptnetmap ring */
+struct ptnet_ring_cfg {
+	uint64_t ioeventfd;		/* eventfd in linux, tsleep() parameter in FreeBSD */
+	uint64_t irqfd;			/* eventfd in linux, ioctl fd in FreeBSD */
+	struct nm_kth_ioctl ioctl;	/* ioctl parameter to send irq (only used in bhyve/FreeBSD) */
+};
+#endif /* _NET_NETMAP_H_ */
diff --git a/vnet/vnet/devices/netmap/netmap.c b/vnet/vnet/devices/netmap/netmap.c
new file mode 100644
index 00000000..2f3233a2
--- /dev/null
+++ b/vnet/vnet/devices/netmap/netmap.c
@@ -0,0 +1,240 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <stdint.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <vnet/devices/netmap/net_netmap.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/netmap/netmap.h>
+
+static u32
+netmap_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
+{
+  /* nothing for now */
+  return 0;
+}
+
+static clib_error_t * netmap_fd_read_ready (unix_file_t * uf)
+{
+  vlib_main_t * vm = vlib_get_main();
+  netmap_main_t * nm = &netmap_main;
+  u32 idx = uf->private_data;
+
+  nm->pending_input_bitmap = clib_bitmap_set (nm->pending_input_bitmap, idx, 1);
+
+  /* Schedule the rx node */
+  vlib_node_set_interrupt_pending (vm, netmap_input_node.index);
+
+  return 0;
+}
+
+static void
+close_netmap_if(netmap_main_t * nm, netmap_if_t * nif)
+{
+  if (nif->unix_file_index != ~0) {
+    unix_file_del(&unix_main, unix_main.file_pool + nif->unix_file_index);
+    nif->unix_file_index = ~0;
+  }
+
+  if (nif->fd > -1)
+    close(nif->fd);
+
+  if (nif->mem_region)
+    {
+      netmap_mem_region_t * reg = &nm->mem_regions[nif->mem_region];
+      if (--reg->refcnt == 0)
+	{
+	  munmap(reg->mem, reg->region_size);
+	  reg->region_size = 0;
+	}
+    }
+
+
+  mhash_unset(&nm->if_index_by_host_if_name, nif->host_if_name, &nif->if_index);
+  vec_free(nif->host_if_name);
+  vec_free(nif->req);
+
+  memset(nif, 0, sizeof(*nif));
+  pool_put(nm->interfaces, nif);
+}
+
+int
+netmap_create_if(vlib_main_t * vm, u8 * if_name, u8 * hw_addr_set,
+		 u8 is_pipe, u8 is_master)
+{
+  netmap_main_t * nm = &netmap_main;
+  int ret = 0;
+  netmap_if_t * nif = 0;
+  u8 hw_addr[6];
+  clib_error_t * error = 0;
+  vnet_sw_interface_t * sw;
+  vnet_main_t *vnm = vnet_get_main();
+  uword * p;
+  struct nmreq * req = 0;
+  netmap_mem_region_t * reg;
+  int fd;
+
+  p = mhash_get (&nm->if_index_by_host_if_name, if_name);
+  if (p)
+      return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+
+  fd = open("/dev/netmap", O_RDWR);
+  if (fd < 0)
+      return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+
+  pool_get (nm->interfaces, nif);
+  nif->if_index = nif - nm->interfaces;
+  nif->fd = fd;
+  nif->unix_file_index = ~0;
+
+  vec_validate(req, 0);
+  nif->req = req;
+  req->nr_version = NETMAP_API;
+  req->nr_flags = NR_REG_ALL_NIC;
+
+  if (is_pipe)
+    req->nr_flags = is_master ? NR_REG_PIPE_MASTER : NR_REG_PIPE_SLAVE;
+  else
+    req->nr_flags = NR_REG_ALL_NIC;
+
+  req->nr_flags |= NR_ACCEPT_VNET_HDR;
+  snprintf(req->nr_name, IFNAMSIZ, "%s", if_name);
+  req->nr_name[IFNAMSIZ-1] = 0;
+
+  if (ioctl(nif->fd, NIOCREGIF, req))
+    {
+      ret = VNET_API_ERROR_NOT_CONNECTED;
+      goto error;
+    }
+
+  nif->mem_region = req->nr_arg2;
+  vec_validate (nm->mem_regions, nif->mem_region);
+  reg = &nm->mem_regions[nif->mem_region];
+  if (reg->region_size == 0)
+    {
+      reg->mem = mmap(NULL, req->nr_memsize, PROT_READ | PROT_WRITE,
+		      MAP_SHARED, fd, 0);
+      clib_warning("mem %p", reg->mem);
+      if (reg->mem == MAP_FAILED)
+	{
+	  ret = VNET_API_ERROR_NOT_CONNECTED;
+	  goto error;
+	}
+      reg->region_size = req->nr_memsize;
+    }
+  reg->refcnt++;
+
+  nif->nifp = NETMAP_IF(reg->mem, req->nr_offset);
+  nif->first_rx_ring = 0;
+  nif->last_rx_ring = 0;
+  nif->first_tx_ring = 0;
+  nif->last_tx_ring = 0;
+  nif->host_if_name = if_name;
+  nif->per_interface_next_index = ~0;
+
+  {
+    unix_file_t template = {0};
+    template.read_function = netmap_fd_read_ready;
+    template.file_descriptor = nif->fd;
+    template.private_data = nif->if_index;
+    nif->unix_file_index = unix_file_add (&unix_main, &template);
+  }
+
+  /*use configured or generate random MAC address */
+  if (hw_addr_set)
+    memcpy(hw_addr, hw_addr_set, 6);
+  else
+    {
+      f64 now = vlib_time_now(vm);
+      u32 rnd;
+      rnd = (u32) (now * 1e6);
+      rnd = random_u32 (&rnd);
+
+      memcpy (hw_addr+2, &rnd, sizeof(rnd));
+      hw_addr[0] = 2;
+      hw_addr[1] = 0xfe;
+    }
+
+  error = ethernet_register_interface(vnm, netmap_device_class.index,
+				      nif->if_index, hw_addr, &nif->hw_if_index,
+				      netmap_eth_flag_change);
+
+  if (error)
+    {
+      clib_error_report (error);
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  sw = vnet_get_hw_sw_interface (vnm, nif->hw_if_index);
+  nif->sw_if_index = sw->sw_if_index;
+
+  vnet_hw_interface_set_flags (vnm, nif->hw_if_index,
+			       VNET_HW_INTERFACE_FLAG_LINK_UP);
+
+  mhash_set_mem (&nm->if_index_by_host_if_name, if_name, &nif->if_index, 0);
+
+  return 0;
+
+error:
+  close_netmap_if(nm, nif);
+  return ret;
+}
+
+int
+netmap_delete_if(vlib_main_t *vm, u8 *host_if_name)
+{
+  vnet_main_t *vnm = vnet_get_main();
+  netmap_main_t *nm = &netmap_main;
+  netmap_if_t *nif;
+  uword *p;
+
+  p = mhash_get(&nm->if_index_by_host_if_name, host_if_name);
+  if (p == NULL) {
+    clib_warning("Host interface %s does not exist", host_if_name);
+    return VNET_API_ERROR_SYSCALL_ERROR_1;
+  }
+  nif = pool_elt_at_index(nm->interfaces, p[0]);
+
+  /* bring down the interface */
+  vnet_hw_interface_set_flags(vnm, nif->hw_if_index, 0);
+
+  ethernet_delete_interface(vnm, nif->hw_if_index);
+
+  close_netmap_if(nm, nif);
+  return 0;
+}
+
+static clib_error_t *
+netmap_init (vlib_main_t * vm)
+{
+  netmap_main_t * nm = &netmap_main;
+
+  memset (nm, 0, sizeof (netmap_main_t));
+
+  mhash_init_vec_string (&nm->if_index_by_host_if_name, sizeof (uword));
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (netmap_init);
diff --git a/vnet/vnet/devices/netmap/netmap.h b/vnet/vnet/devices/netmap/netmap.h
new file mode 100644
index 00000000..d9a476b6
--- /dev/null
+++ b/vnet/vnet/devices/netmap/netmap.h
@@ -0,0 +1,131 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+/*
+ * Copyright (C) 2011-2014 Universita` di Pisa. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <vnet/devices/netmap/net_netmap.h>
+
+typedef struct {
+  CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
+  u8 * host_if_name;
+  uword if_index;
+  u32 hw_if_index;
+  u32 sw_if_index;
+  u32 unix_file_index;
+
+  u32 per_interface_next_index;
+  u8 is_admin_up;
+
+  /* netmap */
+  struct nmreq * req;
+  u16 mem_region;
+  int fd;
+  struct netmap_if * nifp;
+  u16 first_tx_ring;
+  u16 last_tx_ring;
+  u16 first_rx_ring;
+  u16 last_rx_ring;
+
+} netmap_if_t;
+
+typedef struct {
+  char * mem;
+  u32 region_size;
+  int refcnt;
+} netmap_mem_region_t;
+
+typedef struct {
+  CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
+  netmap_if_t * interfaces;
+
+  /* bitmap of pending rx interfaces */
+  uword * pending_input_bitmap;
+
+  /* rx buffer cache */
+  u32 * rx_buffers;
+
+  /* hash of host interface names */
+  mhash_t if_index_by_host_if_name;
+
+  /* vector of memory regions */
+  netmap_mem_region_t * mem_regions;
+} netmap_main_t;
+
+netmap_main_t netmap_main;
+extern vnet_device_class_t netmap_device_class;
+extern vlib_node_registration_t netmap_input_node;
+
+int netmap_create_if(vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set, u8 is_pipe, u8 is_master);
+int netmap_delete_if(vlib_main_t * vm, u8 * host_if_name);
+
+
+/* Macros and helper functions from sys/net/netmap_user.h */
+
+#define _NETMAP_OFFSET(type, ptr, offset) \
+	((type)(void *)((char *)(ptr) + (offset)))
+
+#define NETMAP_IF(_base, _ofs)	_NETMAP_OFFSET(struct netmap_if *, _base, _ofs)
+
+#define NETMAP_TXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *, \
+	nifp, (nifp)->ring_ofs[index] )
+
+#define NETMAP_RXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *,	\
+	nifp, (nifp)->ring_ofs[index + (nifp)->ni_tx_rings + 1] )
+
+#define NETMAP_BUF(ring, index)				\
+	((char *)(ring) + (ring)->buf_ofs + ((index)*(ring)->nr_buf_size))
+
+#define NETMAP_BUF_IDX(ring, buf)			\
+	( ((char *)(buf) - ((char *)(ring) + (ring)->buf_ofs) ) / \
+		(ring)->nr_buf_size )
+
+static inline uint32_t
+nm_ring_space(struct netmap_ring *ring)
+{
+        int ret = ring->tail - ring->cur;
+        if (ret < 0)
+                ret += ring->num_slots;
+        return ret;
+}
+
+
diff --git a/vnet/vnet/devices/netmap/node.c b/vnet/vnet/devices/netmap/node.c
new file mode 100644
index 00000000..f866a282
--- /dev/null
+++ b/vnet/vnet/devices/netmap/node.c
@@ -0,0 +1,284 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/netmap/netmap.h>
+
+#define foreach_netmap_input_error
+
+typedef enum {
+#define _(f,s) NETMAP_INPUT_ERROR_##f,
+  foreach_netmap_input_error
+#undef _
+  NETMAP_INPUT_N_ERROR,
+} netmap_input_error_t;
+
+static char * netmap_input_error_strings[] = {
+#define _(n,s) s,
+    foreach_netmap_input_error
+#undef _
+};
+
+enum {
+  NETMAP_INPUT_NEXT_DROP,
+  NETMAP_INPUT_NEXT_ETHERNET_INPUT,
+  NETMAP_INPUT_N_NEXT,
+};
+
+typedef struct {
+  u32 next_index;
+  u32 hw_if_index;
+  struct netmap_slot slot;
+} netmap_input_trace_t;
+
+static u8 * format_netmap_input_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  netmap_input_trace_t * t = va_arg (*args, netmap_input_trace_t *);
+  uword indent = format_get_indent (s);
+
+  s = format (s, "netmap: hw_if_index %d next-index %d",
+	      t->hw_if_index, t->next_index);
+  s = format (s, "\n%Uslot: flags 0x%x len %u buf_idx %u",
+	      format_white_space, indent + 2,
+	      t->slot.flags, t->slot.len, t->slot.buf_idx);
+  return s;
+}
+
+always_inline void
+buffer_add_to_chain(vlib_main_t *vm, u32 bi, u32 first_bi, u32 prev_bi)
+{
+  vlib_buffer_t * b = vlib_get_buffer (vm, bi);
+  vlib_buffer_t * first_b = vlib_get_buffer (vm, first_bi);
+  vlib_buffer_t * prev_b = vlib_get_buffer (vm, prev_bi);
+
+  /* update first buffer */
+  first_b->total_length_not_including_first_buffer +=  b->current_length;
+
+  /* update previous buffer */
+  prev_b->next_buffer = bi;
+  prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+  /* update current buffer */
+  b->next_buffer = 0;
+
+#if DPDK > 0
+  struct rte_mbuf * mbuf = rte_mbuf_from_vlib_buffer(b);
+  struct rte_mbuf * first_mbuf = rte_mbuf_from_vlib_buffer(first_b);
+  struct rte_mbuf * prev_mbuf = rte_mbuf_from_vlib_buffer(prev_b);
+  first_mbuf->nb_segs++;
+  prev_mbuf->next = mbuf;
+  mbuf->data_len = b->current_length;
+  mbuf->data_off = RTE_PKTMBUF_HEADROOM + b->current_data;
+  mbuf->next = 0;
+#endif
+}
+
+always_inline uword
+netmap_device_input_fn  (vlib_main_t * vm, vlib_node_runtime_t * node,
+			    vlib_frame_t * frame, u32 device_idx)
+{
+  u32 next_index = NETMAP_INPUT_NEXT_ETHERNET_INPUT;
+  uword n_trace = vlib_get_trace_count (vm, node);
+  netmap_main_t * nm = &netmap_main;
+  netmap_if_t * nif = pool_elt_at_index(nm->interfaces, device_idx);
+  u32 n_rx_packets = 0;
+  u32 n_rx_bytes = 0;
+  u32 * to_next = 0;
+  u32 n_free_bufs;
+  struct netmap_ring * ring;
+  int cur_ring;
+  u32 n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm,
+    VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+
+  if (nif->per_interface_next_index != ~0)
+      next_index = nif->per_interface_next_index;
+
+  n_free_bufs = vec_len (nm->rx_buffers);
+  if (PREDICT_FALSE(n_free_bufs < VLIB_FRAME_SIZE))
+    {
+      vec_validate(nm->rx_buffers, VLIB_FRAME_SIZE + n_free_bufs - 1);
+      n_free_bufs += vlib_buffer_alloc(vm, &nm->rx_buffers[n_free_bufs], VLIB_FRAME_SIZE);
+      _vec_len (nm->rx_buffers) = n_free_bufs;
+    }
+
+  cur_ring = nif->first_rx_ring;
+  while (cur_ring <= nif->last_rx_ring && n_free_bufs)
+    {
+      int r = 0;
+      u32 cur_slot_index;
+      ring = NETMAP_RXRING(nif->nifp, cur_ring);
+      r = nm_ring_space(ring);
+
+      if (!r)
+	{
+	  cur_ring++;
+	  continue;
+	}
+
+      if (r > n_free_bufs)
+	r = n_free_bufs;
+
+      cur_slot_index = ring->cur;
+      while (r)
+	{
+          u32 n_left_to_next;
+          u32 next0 = next_index;
+          vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+	  while (r && n_left_to_next)
+	    {
+	      vlib_buffer_t * b0, * first_b0 = 0;
+	      u32 offset = 0;
+	      u32 bi0 = 0, first_bi0 = 0, prev_bi0;
+	      u32 next_slot_index = (cur_slot_index + 1) % ring->num_slots;
+	      u32 next2_slot_index = (cur_slot_index + 2) % ring->num_slots;
+	      struct netmap_slot * slot = &ring->slot[cur_slot_index];
+	      u32 data_len = slot->len;
+
+	      /* prefetch 2 slots in advance */
+	      CLIB_PREFETCH (&ring->slot[next2_slot_index], CLIB_CACHE_LINE_BYTES, LOAD);
+	      /* prefetch start of next packet */
+	      CLIB_PREFETCH (NETMAP_BUF(ring, ring->slot[next_slot_index].buf_idx),
+			     CLIB_CACHE_LINE_BYTES, LOAD);
+
+	      while (data_len && n_free_bufs)
+		{
+		  /* grab free buffer */
+		  u32 last_empty_buffer = vec_len (nm->rx_buffers) - 1;
+		  prev_bi0 = bi0;
+		  bi0 = nm->rx_buffers[last_empty_buffer];
+		  b0 = vlib_get_buffer (vm, bi0);
+		  _vec_len (nm->rx_buffers) = last_empty_buffer;
+		  n_free_bufs--;
+
+		  /* copy data */
+		  u32 bytes_to_copy = data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
+		  b0->current_data = 0;
+		  clib_memcpy (vlib_buffer_get_current (b0),
+			  (u8 *) NETMAP_BUF(ring, slot->buf_idx) + offset,
+			  bytes_to_copy);
+
+		  /* fill buffer header */
+		  b0->clone_count = 0;
+		  b0->current_length = bytes_to_copy;
+
+		  if (offset == 0)
+		    {
+#if DPDK > 0
+		      struct rte_mbuf * mb = rte_mbuf_from_vlib_buffer(b0);
+		      rte_pktmbuf_data_len (mb) = b0->current_length;
+		      rte_pktmbuf_pkt_len (mb) = b0->current_length;
+#endif
+		      b0->total_length_not_including_first_buffer = 0;
+		      b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+		      vnet_buffer(b0)->sw_if_index[VLIB_RX] = nif->sw_if_index;
+		      vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
+		      first_bi0 = bi0;
+		      first_b0 = vlib_get_buffer(vm, first_bi0);
+		    }
+		  else
+		    buffer_add_to_chain(vm, bi0, first_bi0, prev_bi0);
+
+		  offset += bytes_to_copy;
+		  data_len -= bytes_to_copy;
+		}
+
+	      /* trace */
+	      VLIB_BUFFER_TRACE_TRAJECTORY_INIT(first_b0);
+	      if (PREDICT_FALSE(n_trace > 0))
+	        {
+	          netmap_input_trace_t *tr;
+	          vlib_trace_buffer (vm, node, next0, first_b0, /* follow_chain */ 0);
+	          vlib_set_trace_count (vm, node, --n_trace);
+	          tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+	          tr->next_index = next0;
+		  tr->hw_if_index = nif->hw_if_index;
+		  memcpy (&tr->slot, slot, sizeof (struct netmap_slot));
+	        }
+	      /* enque and take next packet */
+	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					       n_left_to_next, first_bi0, next0);
+
+	      /* next packet */
+	      n_rx_packets++;
+	      n_rx_bytes += slot->len;
+	      to_next[0] = first_bi0;
+	      to_next += 1;
+	      n_left_to_next--;
+	      cur_slot_index = next_slot_index;
+
+	      r--;
+	    }
+          vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+	}
+       ring->head = ring->cur = cur_slot_index;
+       cur_ring++;
+    }
+
+  if (n_rx_packets)
+    ioctl(nif->fd, NIOCTXSYNC, NULL);
+
+  vlib_increment_combined_counter
+    (vnet_get_main()->interface_main.combined_sw_if_counters
+     + VNET_INTERFACE_COUNTER_RX,
+     os_get_cpu_number(),
+     nif->hw_if_index,
+     n_rx_packets, n_rx_bytes);
+
+  return n_rx_packets;
+}
+
+static uword
+netmap_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+		    vlib_frame_t * frame)
+{
+  int i;
+  u32 n_rx_packets = 0;
+
+  netmap_main_t * nm = &netmap_main;
+
+  clib_bitmap_foreach (i, nm->pending_input_bitmap,
+    ({
+      clib_bitmap_set (nm->pending_input_bitmap, i, 0);
+      n_rx_packets += netmap_device_input_fn(vm, node, frame, i);
+    }));
+
+  return n_rx_packets;
+}
+
+
+VLIB_REGISTER_NODE (netmap_input_node) = {
+  .function = netmap_input_fn,
+  .name = "netmap-input",
+  .format_trace = format_netmap_input_trace,
+  .type = VLIB_NODE_TYPE_INPUT,
+  .state = VLIB_NODE_STATE_INTERRUPT,
+  .n_errors = NETMAP_INPUT_N_ERROR,
+  .error_strings = netmap_input_error_strings,
+
+  .n_next_nodes = NETMAP_INPUT_N_NEXT,
+  .next_nodes = {
+    [NETMAP_INPUT_NEXT_DROP] = "error-drop",
+    [NETMAP_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
+  },
+};
+
diff --git a/vnet/vnet/vcgn/cnat_cli_handler.c b/vnet/vnet/vcgn/cnat_cli_handler.c
index 46c84935..e76d7cc4 100644
--- a/vnet/vnet/vcgn/cnat_cli_handler.c
+++ b/vnet/vnet/vcgn/cnat_cli_handler.c
@@ -37,6 +37,10 @@
 
 #include <arpa/inet.h>
 
+#if DPDK
+#include <vnet/devices/dpdk/dpdk.h>
+#endif
+
 u32 show_debug_level = 0;
 
 u32
diff --git a/vnet/vnet/vnet.h b/vnet/vnet/vnet.h
index 2378c242..9254da62 100644
--- a/vnet/vnet/vnet.h
+++ b/vnet/vnet/vnet.h
@@ -84,9 +84,4 @@ vnet_main_t **vnet_mains;
 #include <vnet/interface_funcs.h>
 #include <vnet/global_funcs.h>
 
-#if DPDK > 0
-#include <vnet/devices/dpdk/threads.h>
-#include <vnet/dpdk_replication.h>
-#endif
-
 #endif /* included_vnet_vnet_h */