releases/3.18.49/samples-move-mic-mpssd-example-code-from-documentation.patch

From faf6aa4b129d2edb80a95a4b61f955fda5a194f4 Mon Sep 17 00:00:00 2001
From: Shuah Khan <shuahkh@osg.samsung.com>
Date: Fri, 16 Sep 2016 15:53:52 -0600
Subject: samples: move mic/mpssd example code from Documentation

From: Shuah Khan <shuahkh@osg.samsung.com>

commit 6bee835dd54e279f3d3ae2eca92a9c394b4fd028 upstream.

Move mic/mpssd examples to samples and remove it from Documentation
Makefile. Create a new Makefile to build mic/mpssd. It can be built
from top level directory or from mic/mpssd directory:

Run make -C samples/mic/mpssd or cd samples/mic/mpssd; make

Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
[backported to 3.18-stable as this code is broken on newer versions of
 gcc and we don't want to break the build for a Documentation sample.
 - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 Documentation/Makefile             |    2 
 Documentation/mic/Makefile         |    1 
 Documentation/mic/mpssd/.gitignore |    1 
 Documentation/mic/mpssd/Makefile   |   19 
 Documentation/mic/mpssd/micctrl    |  173 ---
 Documentation/mic/mpssd/mpss       |  202 ----
 Documentation/mic/mpssd/mpssd.c    | 1728 -------------------------------------
 Documentation/mic/mpssd/mpssd.h    |  102 --
 Documentation/mic/mpssd/sysfs.c    |  102 --
 samples/mic/mpssd/.gitignore       |    1 
 samples/mic/mpssd/Makefile         |   27 
 samples/mic/mpssd/micctrl          |  173 +++
 samples/mic/mpssd/mpss             |  202 ++++
 samples/mic/mpssd/mpssd.c          | 1728 +++++++++++++++++++++++++++++++++++++
 samples/mic/mpssd/mpssd.h          |  102 ++
 samples/mic/mpssd/sysfs.c          |  102 ++
 16 files changed, 2336 insertions(+), 2329 deletions(-)

--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,4 +1,4 @@
 subdir-y := accounting auxdisplay blackfin connector \
-	filesystems filesystems ia64 laptops mic misc-devices \
+	filesystems filesystems ia64 laptops misc-devices \
 	networking pcmcia prctl ptp spi timers vDSO video4linux \
 	watchdog
--- a/Documentation/mic/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-subdir-y := mpssd
--- a/Documentation/mic/mpssd/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-mpssd
--- a/Documentation/mic/mpssd/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-# List of programs to build
-hostprogs-y := mpssd
-
-mpssd-objs := mpssd.o sysfs.o
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS += -I$(objtree)/usr/include -I$(srctree)/tools/include
-
-ifdef DEBUG
-HOSTCFLAGS += -DDEBUG=$(DEBUG)
-endif
-
-HOSTLOADLIBES_mpssd := -lpthread
-
-install:
-	install mpssd /usr/sbin/mpssd
-	install micctrl /usr/sbin/micctrl
--- a/Documentation/mic/mpssd/micctrl
+++ /dev/null
@@ -1,173 +0,0 @@
-#!/bin/bash
-# Intel MIC Platform Software Stack (MPSS)
-#
-# Copyright(c) 2013 Intel Corporation.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License, version 2, as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# The full GNU General Public License is included in this distribution in
-# the file called "COPYING".
-#
-# Intel MIC User Space Tools.
-#
-# micctrl - Controls MIC boot/start/stop.
-#
-# chkconfig: 2345 95 05
-# description: start MPSS stack processing.
-#
-### BEGIN INIT INFO
-# Provides: micctrl
-### END INIT INFO
-
-# Source function library.
-. /etc/init.d/functions
-
-sysfs="/sys/class/mic"
-
-_status()
-{
-	f=$sysfs/$1
-	echo -e $1 state: "`cat $f/state`" shutdown_status: "`cat $f/shutdown_status`"
-}
-
-status()
-{
-	if [ "`echo $1 | head -c3`" == "mic" ]; then
-		_status $1
-		return $?
-	fi
-	for f in $sysfs/*
-	do
-		_status `basename $f`
-		RETVAL=$?
-		[ $RETVAL -ne 0 ] && return $RETVAL
-	done
-	return 0
-}
-
-_reset()
-{
-	f=$sysfs/$1
-	echo reset > $f/state
-}
-
-reset()
-{
-	if [ "`echo $1 | head -c3`" == "mic" ]; then
-		_reset $1
-		return $?
-	fi
-	for f in $sysfs/*
-	do
-		_reset `basename $f`
-		RETVAL=$?
-		[ $RETVAL -ne 0 ] && return $RETVAL
-	done
-	return 0
-}
-
-_boot()
-{
-	f=$sysfs/$1
-	echo "linux" > $f/bootmode
-	echo "mic/uos.img" > $f/firmware
-	echo "mic/$1.image" > $f/ramdisk
-	echo "boot" > $f/state
-}
-
-boot()
-{
-	if [ "`echo $1 | head -c3`" == "mic" ]; then
-		_boot $1
-		return $?
-	fi
-	for f in $sysfs/*
-	do
-		_boot `basename $f`
-		RETVAL=$?
-		[ $RETVAL -ne 0 ] && return $RETVAL
-	done
-	return 0
-}
-
-_shutdown()
-{
-	f=$sysfs/$1
-	echo shutdown > $f/state
-}
-
-shutdown()
-{
-	if [ "`echo $1 | head -c3`" == "mic" ]; then
-		_shutdown $1
-		return $?
-	fi
-	for f in $sysfs/*
-	do
-		_shutdown `basename $f`
-		RETVAL=$?
-		[ $RETVAL -ne 0 ] && return $RETVAL
-	done
-	return 0
-}
-
-_wait()
-{
-	f=$sysfs/$1
-	while [ "`cat $f/state`" != "offline" -a "`cat $f/state`" != "online" ]
-	do
-		sleep 1
-		echo -e "Waiting for $1 to go offline"
-	done
-}
-
-wait()
-{
-	if [ "`echo $1 | head -c3`" == "mic" ]; then
-		_wait $1
-		return $?
-	fi
-	# Wait for the cards to go offline
-	for f in $sysfs/*
-	do
-		_wait `basename $f`
-		RETVAL=$?
-		[ $RETVAL -ne 0 ] && return $RETVAL
-	done
-	return 0
-}
-
-if [ ! -d "$sysfs" ]; then
-	echo -e $"Module unloaded "
-	exit 3
-fi
-
-case $1 in
-	-s)
-		status $2
-		;;
-	-r)
-		reset $2
-		;;
-	-b)
-		boot $2
-		;;
-	-S)
-		shutdown $2
-		;;
-	-w)
-		wait $2
-		;;
-	*)
-		echo $"Usage: $0 {-s (status) |-r (reset) |-b (boot) |-S (shutdown) |-w (wait)}"
-		exit 2
-esac
-
-exit $?
--- a/Documentation/mic/mpssd/mpss
+++ /dev/null
@@ -1,202 +0,0 @@
-#!/bin/bash
-# Intel MIC Platform Software Stack (MPSS)
-#
-# Copyright(c) 2013 Intel Corporation.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License, version 2, as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# The full GNU General Public License is included in this distribution in
-# the file called "COPYING".
-#
-# Intel MIC User Space Tools.
-#
-# mpss	Start mpssd.
-#
-# chkconfig: 2345 95 05
-# description: start MPSS stack processing.
-#
-### BEGIN INIT INFO
-# Provides: mpss
-# Required-Start:
-# Required-Stop:
-# Short-Description: MPSS stack control
-# Description: MPSS stack control
-### END INIT INFO
-
-# Source function library.
-. /etc/init.d/functions
-
-exec=/usr/sbin/mpssd
-sysfs="/sys/class/mic"
-
-start()
-{
-	[ -x $exec ] || exit 5
-
-	if [ "`ps -e | awk '{print $4}' | grep mpssd | head -1`" = "mpssd" ]; then
-		echo -e $"MPSSD already running! "
-		success
-		echo
-		return 0
-	fi
-
-	echo -e $"Starting MPSS Stack"
-	echo -e $"Loading MIC_X100_DMA & MIC_HOST Modules"
-
-	for f in "mic_host" "mic_x100_dma"
-	do
-		modprobe $f
-		RETVAL=$?
-		if [ $RETVAL -ne 0 ]; then
-			failure
-			echo
-			return $RETVAL
-		fi
-	done
-
-	# Start the daemon
-	echo -n $"Starting MPSSD "
-	$exec
-	RETVAL=$?
-	if [ $RETVAL -ne 0 ]; then
-		failure
-		echo
-		return $RETVAL
-	fi
-	success
-	echo
-
-	sleep 5
-
-	# Boot the cards
-	micctrl -b
-
-	# Wait till ping works
-	for f in $sysfs/*
-	do
-		count=100
-		ipaddr=`cat $f/cmdline`
-		ipaddr=${ipaddr#*address,}
-		ipaddr=`echo $ipaddr | cut -d, -f1 | cut -d\; -f1`
-		while [ $count -ge 0 ]
-		do
-			echo -e "Pinging "`basename $f`" "
-			ping -c 1 $ipaddr &> /dev/null
-			RETVAL=$?
-			if [ $RETVAL -eq 0 ]; then
-				success
-				break
-			fi
-			sleep 1
-			count=`expr $count - 1`
-		done
-		[ $RETVAL -ne 0 ] && failure || success
-		echo
-	done
-	return $RETVAL
-}
-
-stop()
-{
-	echo -e $"Shutting down MPSS Stack: "
-
-	# Bail out if module is unloaded
-	if [ ! -d "$sysfs" ]; then
-		echo -n $"Module unloaded "
-		success
-		echo
-		return 0
-	fi
-
-	# Shut down the cards.
-	micctrl -S
-
-	# Wait for the cards to go offline
-	for f in $sysfs/*
-	do
-		while [ "`cat $f/state`" != "offline" ]
-		do
-			sleep 1
-			echo -e "Waiting for "`basename $f`" to go offline"
-		done
-	done
-
-	# Display the status of the cards
-	micctrl -s
-
-	# Kill MPSSD now
-	echo -n $"Killing MPSSD"
-	killall -9 mpssd 2>/dev/null
-	RETVAL=$?
-	[ $RETVAL -ne 0 ] && failure || success
-	echo
-	return $RETVAL
-}
-
-restart()
-{
-	stop
-	sleep 5
-	start
-}
-
-status()
-{
-	micctrl -s
-	if [ "`ps -e | awk '{print $4}' | grep mpssd | head -n 1`" = "mpssd" ]; then
-		echo "mpssd is running"
-	else
-		echo "mpssd is stopped"
-	fi
-	return 0
-}
-
-unload()
-{
-	if [ ! -d "$sysfs" ]; then
-		echo -n $"No MIC_HOST Module: "
-		success
-		echo
-		return
-	fi
-
-	stop
-
-	sleep 5
-	echo -n $"Removing MIC_HOST & MIC_X100_DMA Modules: "
-	modprobe -r mic_host mic_x100_dma
-	RETVAL=$?
-	[ $RETVAL -ne 0 ] && failure || success
-	echo
-	return $RETVAL
-}
-
-case $1 in
-	start)
-		start
-		;;
-	stop)
-		stop
-		;;
-	restart)
-		restart
-		;;
-	status)
-		status
-		;;
-	unload)
-		unload
-		;;
-	*)
-		echo $"Usage: $0 {start|stop|restart|status|unload}"
-		exit 2
-esac
-
-exit $?
--- a/Documentation/mic/mpssd/mpssd.c
+++ /dev/null
@@ -1,1728 +0,0 @@
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC User Space Tools.
- */
-
-#define _GNU_SOURCE
-
-#include <stdlib.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <assert.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <signal.h>
-#include <poll.h>
-#include <features.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/socket.h>
-#include <linux/virtio_ring.h>
-#include <linux/virtio_net.h>
-#include <linux/virtio_console.h>
-#include <linux/virtio_blk.h>
-#include <linux/version.h>
-#include "mpssd.h"
-#include <linux/mic_ioctl.h>
-#include <linux/mic_common.h>
-#include <tools/endian.h>
-
-static void init_mic(struct mic_info *mic);
-
-static FILE *logfp;
-static struct mic_info mic_list;
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
-#define min_t(type, x, y) ({				\
-		type __min1 = (x);                      \
-		type __min2 = (y);                      \
-		__min1 < __min2 ? __min1 : __min2; })
-
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_DOWN(addr, size)  ((addr)&(~((size)-1)))
-#define _ALIGN_UP(addr, size)    _ALIGN_DOWN(addr + size - 1, size)
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr, size)     _ALIGN_UP(addr, size)
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)        _ALIGN(addr, PAGE_SIZE)
-
-#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
-
-#define GSO_ENABLED		1
-#define MAX_GSO_SIZE		(64 * 1024)
-#define ETH_H_LEN		14
-#define MAX_NET_PKT_SIZE	(_ALIGN_UP(MAX_GSO_SIZE + ETH_H_LEN, 64))
-#define MIC_DEVICE_PAGE_END	0x1000
-
-#ifndef VIRTIO_NET_HDR_F_DATA_VALID
-#define VIRTIO_NET_HDR_F_DATA_VALID	2	/* Csum is valid */
-#endif
-
-static struct {
-	struct mic_device_desc dd;
-	struct mic_vqconfig vqconfig[2];
-	__u32 host_features, guest_acknowledgements;
-	struct virtio_console_config cons_config;
-} virtcons_dev_page = {
-	.dd = {
-		.type = VIRTIO_ID_CONSOLE,
-		.num_vq = ARRAY_SIZE(virtcons_dev_page.vqconfig),
-		.feature_len = sizeof(virtcons_dev_page.host_features),
-		.config_len = sizeof(virtcons_dev_page.cons_config),
-	},
-	.vqconfig[0] = {
-		.num = htole16(MIC_VRING_ENTRIES),
-	},
-	.vqconfig[1] = {
-		.num = htole16(MIC_VRING_ENTRIES),
-	},
-};
-
-static struct {
-	struct mic_device_desc dd;
-	struct mic_vqconfig vqconfig[2];
-	__u32 host_features, guest_acknowledgements;
-	struct virtio_net_config net_config;
-} virtnet_dev_page = {
-	.dd = {
-		.type = VIRTIO_ID_NET,
-		.num_vq = ARRAY_SIZE(virtnet_dev_page.vqconfig),
-		.feature_len = sizeof(virtnet_dev_page.host_features),
-		.config_len = sizeof(virtnet_dev_page.net_config),
-	},
-	.vqconfig[0] = {
-		.num = htole16(MIC_VRING_ENTRIES),
-	},
-	.vqconfig[1] = {
-		.num = htole16(MIC_VRING_ENTRIES),
-	},
-#if GSO_ENABLED
-		.host_features = htole32(
-		1 << VIRTIO_NET_F_CSUM |
-		1 << VIRTIO_NET_F_GSO |
-		1 << VIRTIO_NET_F_GUEST_TSO4 |
-		1 << VIRTIO_NET_F_GUEST_TSO6 |
-		1 << VIRTIO_NET_F_GUEST_ECN |
-		1 << VIRTIO_NET_F_GUEST_UFO),
-#else
-		.host_features = 0,
-#endif
-};
-
-static const char *mic_config_dir = "/etc/sysconfig/mic";
-static const char *virtblk_backend = "VIRTBLK_BACKEND";
-static struct {
-	struct mic_device_desc dd;
-	struct mic_vqconfig vqconfig[1];
-	__u32 host_features, guest_acknowledgements;
-	struct virtio_blk_config blk_config;
-} virtblk_dev_page = {
-	.dd = {
-		.type = VIRTIO_ID_BLOCK,
-		.num_vq = ARRAY_SIZE(virtblk_dev_page.vqconfig),
-		.feature_len = sizeof(virtblk_dev_page.host_features),
-		.config_len = sizeof(virtblk_dev_page.blk_config),
-	},
-	.vqconfig[0] = {
-		.num = htole16(MIC_VRING_ENTRIES),
-	},
-	.host_features =
-		htole32(1<<VIRTIO_BLK_F_SEG_MAX),
-	.blk_config = {
-		.seg_max = htole32(MIC_VRING_ENTRIES - 2),
-		.capacity = htole64(0),
-	 }
-};
-
-static char *myname;
-
-static int
-tap_configure(struct mic_info *mic, char *dev)
-{
-	pid_t pid;
-	char *ifargv[7];
-	char ipaddr[IFNAMSIZ];
-	int ret = 0;
-
-	pid = fork();
-	if (pid == 0) {
-		ifargv[0] = "ip";
-		ifargv[1] = "link";
-		ifargv[2] = "set";
-		ifargv[3] = dev;
-		ifargv[4] = "up";
-		ifargv[5] = NULL;
-		mpsslog("Configuring %s\n", dev);
-		ret = execvp("ip", ifargv);
-		if (ret < 0) {
-			mpsslog("%s execvp failed errno %s\n",
-				mic->name, strerror(errno));
-			return ret;
-		}
-	}
-	if (pid < 0) {
-		mpsslog("%s fork failed errno %s\n",
-			mic->name, strerror(errno));
-		return ret;
-	}
-
-	ret = waitpid(pid, NULL, 0);
-	if (ret < 0) {
-		mpsslog("%s waitpid failed errno %s\n",
-			mic->name, strerror(errno));
-		return ret;
-	}
-
-	snprintf(ipaddr, IFNAMSIZ, "172.31.%d.254/24", mic->id);
-
-	pid = fork();
-	if (pid == 0) {
-		ifargv[0] = "ip";
-		ifargv[1] = "addr";
-		ifargv[2] = "add";
-		ifargv[3] = ipaddr;
-		ifargv[4] = "dev";
-		ifargv[5] = dev;
-		ifargv[6] = NULL;
-		mpsslog("Configuring %s ipaddr %s\n", dev, ipaddr);
-		ret = execvp("ip", ifargv);
-		if (ret < 0) {
-			mpsslog("%s execvp failed errno %s\n",
-				mic->name, strerror(errno));
-			return ret;
-		}
-	}
-	if (pid < 0) {
-		mpsslog("%s fork failed errno %s\n",
-			mic->name, strerror(errno));
-		return ret;
-	}
-
-	ret = waitpid(pid, NULL, 0);
-	if (ret < 0) {
-		mpsslog("%s waitpid failed errno %s\n",
-			mic->name, strerror(errno));
-		return ret;
-	}
-	mpsslog("MIC name %s %s %d DONE!\n",
-		mic->name, __func__, __LINE__);
-	return 0;
-}
-
-static int tun_alloc(struct mic_info *mic, char *dev)
-{
-	struct ifreq ifr;
-	int fd, err;
-#if GSO_ENABLED
-	unsigned offload;
-#endif
-	fd = open("/dev/net/tun", O_RDWR);
-	if (fd < 0) {
-		mpsslog("Could not open /dev/net/tun %s\n", strerror(errno));
-		goto done;
-	}
-
-	memset(&ifr, 0, sizeof(ifr));
-
-	ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
-	if (*dev)
-		strncpy(ifr.ifr_name, dev, IFNAMSIZ);
-
-	err = ioctl(fd, TUNSETIFF, (void *)&ifr);
-	if (err < 0) {
-		mpsslog("%s %s %d TUNSETIFF failed %s\n",
-			mic->name, __func__, __LINE__, strerror(errno));
-		close(fd);
-		return err;
-	}
-#if GSO_ENABLED
-	offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 |
-		TUN_F_TSO_ECN | TUN_F_UFO;
-
-	err = ioctl(fd, TUNSETOFFLOAD, offload);
-	if (err < 0) {
-		mpsslog("%s %s %d TUNSETOFFLOAD failed %s\n",
-			mic->name, __func__, __LINE__, strerror(errno));
-		close(fd);
-		return err;
-	}
-#endif
-	strcpy(dev, ifr.ifr_name);
-	mpsslog("Created TAP %s\n", dev);
-done:
-	return fd;
-}
-
-#define NET_FD_VIRTIO_NET 0
-#define NET_FD_TUN 1
-#define MAX_NET_FD 2
-
-static void set_dp(struct mic_info *mic, int type, void *dp)
-{
-	switch (type) {
-	case VIRTIO_ID_CONSOLE:
-		mic->mic_console.console_dp = dp;
-		return;
-	case VIRTIO_ID_NET:
-		mic->mic_net.net_dp = dp;
-		return;
-	case VIRTIO_ID_BLOCK:
-		mic->mic_virtblk.block_dp = dp;
-		return;
-	}
-	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
-	assert(0);
-}
-
-static void *get_dp(struct mic_info *mic, int type)
-{
-	switch (type) {
-	case VIRTIO_ID_CONSOLE:
-		return mic->mic_console.console_dp;
-	case VIRTIO_ID_NET:
-		return mic->mic_net.net_dp;
-	case VIRTIO_ID_BLOCK:
-		return mic->mic_virtblk.block_dp;
-	}
-	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
-	assert(0);
-	return NULL;
-}
-
-static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type)
-{
-	struct mic_device_desc *d;
-	int i;
-	void *dp = get_dp(mic, type);
-
-	for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE;
-		i += mic_total_desc_size(d)) {
-		d = dp + i;
-
-		/* End of list */
-		if (d->type == 0)
-			break;
-
-		if (d->type == -1)
-			continue;
-
-		mpsslog("%s %s d-> type %d d %p\n",
-			mic->name, __func__, d->type, d);
-
-		if (d->type == (__u8)type)
-			return d;
-	}
-	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
-	assert(0);
-	return NULL;
-}
-
-/* See comments in vhost.c for explanation of next_desc() */
-static unsigned next_desc(struct vring_desc *desc)
-{
-	unsigned int next;
-
-	if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT))
-		return -1U;
-	next = le16toh(desc->next);
-	return next;
-}
-
-/* Sum up all the IOVEC length */
-static ssize_t
-sum_iovec_len(struct mic_copy_desc *copy)
-{
-	ssize_t sum = 0;
-	int i;
-
-	for (i = 0; i < copy->iovcnt; i++)
-		sum += copy->iov[i].iov_len;
-	return sum;
-}
-
-static inline void verify_out_len(struct mic_info *mic,
-	struct mic_copy_desc *copy)
-{
-	if (copy->out_len != sum_iovec_len(copy)) {
-		mpsslog("%s %s %d BUG copy->out_len 0x%x len 0x%zx\n",
-			mic->name, __func__, __LINE__,
-			copy->out_len, sum_iovec_len(copy));
-		assert(copy->out_len == sum_iovec_len(copy));
-	}
-}
-
-/* Display an iovec */
-static void
-disp_iovec(struct mic_info *mic, struct mic_copy_desc *copy,
-	   const char *s, int line)
-{
-	int i;
-
-	for (i = 0; i < copy->iovcnt; i++)
-		mpsslog("%s %s %d copy->iov[%d] addr %p len 0x%zx\n",
-			mic->name, s, line, i,
-			copy->iov[i].iov_base, copy->iov[i].iov_len);
-}
-
-static inline __u16 read_avail_idx(struct mic_vring *vr)
-{
-	return ACCESS_ONCE(vr->info->avail_idx);
-}
-
-static inline void txrx_prepare(int type, bool tx, struct mic_vring *vr,
-				struct mic_copy_desc *copy, ssize_t len)
-{
-	copy->vr_idx = tx ? 0 : 1;
-	copy->update_used = true;
-	if (type == VIRTIO_ID_NET)
-		copy->iov[1].iov_len = len - sizeof(struct virtio_net_hdr);
-	else
-		copy->iov[0].iov_len = len;
-}
-
-/* Central API which triggers the copies */
-static int
-mic_virtio_copy(struct mic_info *mic, int fd,
-		struct mic_vring *vr, struct mic_copy_desc *copy)
-{
-	int ret;
-
-	ret = ioctl(fd, MIC_VIRTIO_COPY_DESC, copy);
-	if (ret) {
-		mpsslog("%s %s %d errno %s ret %d\n",
-			mic->name, __func__, __LINE__,
-			strerror(errno), ret);
-	}
-	return ret;
-}
-
-/*
- * This initialization routine requires at least one
- * vring i.e. vr0. vr1 is optional.
- */
-static void *
-init_vr(struct mic_info *mic, int fd, int type,
-	struct mic_vring *vr0, struct mic_vring *vr1, int num_vq)
-{
-	int vr_size;
-	char *va;
-
-	vr_size = PAGE_ALIGN(vring_size(MIC_VRING_ENTRIES,
-		MIC_VIRTIO_RING_ALIGN) + sizeof(struct _mic_vring_info));
-	va = mmap(NULL, MIC_DEVICE_PAGE_END + vr_size * num_vq,
-		PROT_READ, MAP_SHARED, fd, 0);
-	if (MAP_FAILED == va) {
-		mpsslog("%s %s %d mmap failed errno %s\n",
-			mic->name, __func__, __LINE__,
-			strerror(errno));
-		goto done;
-	}
-	set_dp(mic, type, va);
-	vr0->va = (struct mic_vring *)&va[MIC_DEVICE_PAGE_END];
-	vr0->info = vr0->va +
-		vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN);
-	vring_init(&vr0->vr,
-		   MIC_VRING_ENTRIES, vr0->va, MIC_VIRTIO_RING_ALIGN);
-	mpsslog("%s %s vr0 %p vr0->info %p vr_size 0x%x vring 0x%x ",
-		__func__, mic->name, vr0->va, vr0->info, vr_size,
-		vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
-	mpsslog("magic 0x%x expected 0x%x\n",
-		le32toh(vr0->info->magic), MIC_MAGIC + type);
-	assert(le32toh(vr0->info->magic) == MIC_MAGIC + type);
-	if (vr1) {
-		vr1->va = (struct mic_vring *)
-			&va[MIC_DEVICE_PAGE_END + vr_size];
-		vr1->info = vr1->va + vring_size(MIC_VRING_ENTRIES,
-			MIC_VIRTIO_RING_ALIGN);
-		vring_init(&vr1->vr,
-			   MIC_VRING_ENTRIES, vr1->va, MIC_VIRTIO_RING_ALIGN);
-		mpsslog("%s %s vr1 %p vr1->info %p vr_size 0x%x vring 0x%x ",
-			__func__, mic->name, vr1->va, vr1->info, vr_size,
-			vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
-		mpsslog("magic 0x%x expected 0x%x\n",
-			le32toh(vr1->info->magic), MIC_MAGIC + type + 1);
-		assert(le32toh(vr1->info->magic) == MIC_MAGIC + type + 1);
-	}
-done:
-	return va;
-}
-
-static void
-wait_for_card_driver(struct mic_info *mic, int fd, int type)
-{
-	struct pollfd pollfd;
-	int err;
-	struct mic_device_desc *desc = get_device_desc(mic, type);
-
-	pollfd.fd = fd;
-	mpsslog("%s %s Waiting .... desc-> type %d status 0x%x\n",
-		mic->name, __func__, type, desc->status);
-	while (1) {
-		pollfd.events = POLLIN;
-		pollfd.revents = 0;
-		err = poll(&pollfd, 1, -1);
-		if (err < 0) {
-			mpsslog("%s %s poll failed %s\n",
-				mic->name, __func__, strerror(errno));
-			continue;
-		}
-
-		if (pollfd.revents) {
-			mpsslog("%s %s Waiting... desc-> type %d status 0x%x\n",
-				mic->name, __func__, type, desc->status);
-			if (desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
-				mpsslog("%s %s poll.revents %d\n",
-					mic->name, __func__, pollfd.revents);
-				mpsslog("%s %s desc-> type %d status 0x%x\n",
-					mic->name, __func__, type,
-					desc->status);
-				break;
-			}
-		}
-	}
-}
-
-/* Spin till we have some descriptors */
-static void
-spin_for_descriptors(struct mic_info *mic, struct mic_vring *vr)
-{
-	__u16 avail_idx = read_avail_idx(vr);
-
-	while (avail_idx == le16toh(ACCESS_ONCE(vr->vr.avail->idx))) {
-#ifdef DEBUG
-		mpsslog("%s %s waiting for desc avail %d info_avail %d\n",
-			mic->name, __func__,
-			le16toh(vr->vr.avail->idx), vr->info->avail_idx);
-#endif
-		sched_yield();
-	}
-}
-
-static void *
-virtio_net(void *arg)
-{
-	static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)];
-	static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64)));
-	struct iovec vnet_iov[2][2] = {
-		{ { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) },
-		  { .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } },
-		{ { .iov_base = vnet_hdr[1], .iov_len = sizeof(vnet_hdr[1]) },
-		  { .iov_base = vnet_buf[1], .iov_len = sizeof(vnet_buf[1]) } },
-	};
-	struct iovec *iov0 = vnet_iov[0], *iov1 = vnet_iov[1];
-	struct mic_info *mic = (struct mic_info *)arg;
-	char if_name[IFNAMSIZ];
-	struct pollfd net_poll[MAX_NET_FD];
-	struct mic_vring tx_vr, rx_vr;
-	struct mic_copy_desc copy;
-	struct mic_device_desc *desc;
-	int err;
-
-	snprintf(if_name, IFNAMSIZ, "mic%d", mic->id);
-	mic->mic_net.tap_fd = tun_alloc(mic, if_name);
-	if (mic->mic_net.tap_fd < 0)
-		goto done;
-
-	if (tap_configure(mic, if_name))
-		goto done;
-	mpsslog("MIC name %s id %d\n", mic->name, mic->id);
-
-	net_poll[NET_FD_VIRTIO_NET].fd = mic->mic_net.virtio_net_fd;
-	net_poll[NET_FD_VIRTIO_NET].events = POLLIN;
-	net_poll[NET_FD_TUN].fd = mic->mic_net.tap_fd;
-	net_poll[NET_FD_TUN].events = POLLIN;
-
-	if (MAP_FAILED == init_vr(mic, mic->mic_net.virtio_net_fd,
-				  VIRTIO_ID_NET, &tx_vr, &rx_vr,
-		virtnet_dev_page.dd.num_vq)) {
-		mpsslog("%s init_vr failed %s\n",
-			mic->name, strerror(errno));
-		goto done;
-	}
-
-	copy.iovcnt = 2;
-	desc = get_device_desc(mic, VIRTIO_ID_NET);
-
-	while (1) {
-		ssize_t len;
-
-		net_poll[NET_FD_VIRTIO_NET].revents = 0;
-		net_poll[NET_FD_TUN].revents = 0;
-
-		/* Start polling for data from tap and virtio net */
-		err = poll(net_poll, 2, -1);
-		if (err < 0) {
-			mpsslog("%s poll failed %s\n",
-				__func__, strerror(errno));
-			continue;
-		}
-		if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK))
-			wait_for_card_driver(mic, mic->mic_net.virtio_net_fd,
-					     VIRTIO_ID_NET);
-		/*
-		 * Check if there is data to be read from TUN and write to
-		 * virtio net fd if there is.
-		 */
-		if (net_poll[NET_FD_TUN].revents & POLLIN) {
-			copy.iov = iov0;
-			len = readv(net_poll[NET_FD_TUN].fd,
-				copy.iov, copy.iovcnt);
-			if (len > 0) {
-				struct virtio_net_hdr *hdr
-					= (struct virtio_net_hdr *)vnet_hdr[0];
-
-				/* Disable checksums on the card since we are on
-				   a reliable PCIe link */
-				hdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
-#ifdef DEBUG
-				mpsslog("%s %s %d hdr->flags 0x%x ", mic->name,
-					__func__, __LINE__, hdr->flags);
-				mpsslog("copy.out_len %d hdr->gso_type 0x%x\n",
-					copy.out_len, hdr->gso_type);
-#endif
-#ifdef DEBUG
-				disp_iovec(mic, copy, __func__, __LINE__);
-				mpsslog("%s %s %d read from tap 0x%lx\n",
-					mic->name, __func__, __LINE__,
-					len);
-#endif
-				spin_for_descriptors(mic, &tx_vr);
-				txrx_prepare(VIRTIO_ID_NET, 1, &tx_vr, &copy,
-					     len);
-
-				err = mic_virtio_copy(mic,
-					mic->mic_net.virtio_net_fd, &tx_vr,
-					&copy);
-				if (err < 0) {
-					mpsslog("%s %s %d mic_virtio_copy %s\n",
-						mic->name, __func__, __LINE__,
-						strerror(errno));
-				}
-				if (!err)
-					verify_out_len(mic, &copy);
-#ifdef DEBUG
-				disp_iovec(mic, copy, __func__, __LINE__);
-				mpsslog("%s %s %d wrote to net 0x%lx\n",
-					mic->name, __func__, __LINE__,
-					sum_iovec_len(&copy));
-#endif
-				/* Reinitialize IOV for next run */
-				iov0[1].iov_len = MAX_NET_PKT_SIZE;
-			} else if (len < 0) {
-				disp_iovec(mic, &copy, __func__, __LINE__);
-				mpsslog("%s %s %d read failed %s ", mic->name,
-					__func__, __LINE__, strerror(errno));
-				mpsslog("cnt %d sum %zd\n",
-					copy.iovcnt, sum_iovec_len(&copy));
-			}
-		}
-
-		/*
-		 * Check if there is data to be read from virtio net and
-		 * write to TUN if there is.
-		 */
-		if (net_poll[NET_FD_VIRTIO_NET].revents & POLLIN) {
-			while (rx_vr.info->avail_idx !=
-				le16toh(rx_vr.vr.avail->idx)) {
-				copy.iov = iov1;
-				txrx_prepare(VIRTIO_ID_NET, 0, &rx_vr, &copy,
-					     MAX_NET_PKT_SIZE
-					+ sizeof(struct virtio_net_hdr));
-
-				err = mic_virtio_copy(mic,
-					mic->mic_net.virtio_net_fd, &rx_vr,
-					&copy);
-				if (!err) {
-#ifdef DEBUG
-					struct virtio_net_hdr *hdr
-						= (struct virtio_net_hdr *)
-							vnet_hdr[1];
-
-					mpsslog("%s %s %d hdr->flags 0x%x, ",
-						mic->name, __func__, __LINE__,
-						hdr->flags);
-					mpsslog("out_len %d gso_type 0x%x\n",
-						copy.out_len,
-						hdr->gso_type);
-#endif
-					/* Set the correct output iov_len */
-					iov1[1].iov_len = copy.out_len -
-						sizeof(struct virtio_net_hdr);
-					verify_out_len(mic, &copy);
-#ifdef DEBUG
-					disp_iovec(mic, copy, __func__,
-						   __LINE__);
-					mpsslog("%s %s %d ",
-						mic->name, __func__, __LINE__);
-					mpsslog("read from net 0x%lx\n",
-						sum_iovec_len(copy));
-#endif
-					len = writev(net_poll[NET_FD_TUN].fd,
-						copy.iov, copy.iovcnt);
-					if (len != sum_iovec_len(&copy)) {
-						mpsslog("Tun write failed %s ",
-							strerror(errno));
-						mpsslog("len 0x%zx ", len);
-						mpsslog("read_len 0x%zx\n",
-							sum_iovec_len(&copy));
-					} else {
-#ifdef DEBUG
-						disp_iovec(mic, &copy, __func__,
-							   __LINE__);
-						mpsslog("%s %s %d ",
-							mic->name, __func__,
-							__LINE__);
-						mpsslog("wrote to tap 0x%lx\n",
-							len);
-#endif
-					}
-				} else {
-					mpsslog("%s %s %d mic_virtio_copy %s\n",
-						mic->name, __func__, __LINE__,
-						strerror(errno));
-					break;
-				}
-			}
-		}
-		if (net_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
-			mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
-	}
-done:
-	pthread_exit(NULL);
-}
-
-/* virtio_console */
-#define VIRTIO_CONSOLE_FD 0
-#define MONITOR_FD (VIRTIO_CONSOLE_FD + 1)
-#define MAX_CONSOLE_FD (MONITOR_FD + 1)  /* must be the last one + 1 */
-#define MAX_BUFFER_SIZE PAGE_SIZE
-
-static void *
-virtio_console(void *arg)
-{
-	static __u8 vcons_buf[2][PAGE_SIZE];
-	struct iovec vcons_iov[2] = {
-		{ .iov_base = vcons_buf[0], .iov_len = sizeof(vcons_buf[0]) },
-		{ .iov_base = vcons_buf[1], .iov_len = sizeof(vcons_buf[1]) },
-	};
-	struct iovec *iov0 = &vcons_iov[0], *iov1 = &vcons_iov[1];
-	struct mic_info *mic = (struct mic_info *)arg;
-	int err;
-	struct pollfd console_poll[MAX_CONSOLE_FD];
-	int pty_fd;
-	char *pts_name;
-	ssize_t len;
-	struct mic_vring tx_vr, rx_vr;
-	struct mic_copy_desc copy;
-	struct mic_device_desc *desc;
-
-	pty_fd = posix_openpt(O_RDWR);
-	if (pty_fd < 0) {
-		mpsslog("can't open a pseudoterminal master device: %s\n",
-			strerror(errno));
-		goto _return;
-	}
-	pts_name = ptsname(pty_fd);
-	if (pts_name == NULL) {
-		mpsslog("can't get pts name\n");
-		goto _close_pty;
-	}
-	printf("%s console message goes to %s\n", mic->name, pts_name);
-	mpsslog("%s console message goes to %s\n", mic->name, pts_name);
-	err = grantpt(pty_fd);
-	if (err < 0) {
-		mpsslog("can't grant access: %s %s\n",
-			pts_name, strerror(errno));
-		goto _close_pty;
-	}
-	err = unlockpt(pty_fd);
-	if (err < 0) {
-		mpsslog("can't unlock a pseudoterminal: %s %s\n",
-			pts_name, strerror(errno));
-		goto _close_pty;
-	}
-	console_poll[MONITOR_FD].fd = pty_fd;
-	console_poll[MONITOR_FD].events = POLLIN;
-
-	console_poll[VIRTIO_CONSOLE_FD].fd = mic->mic_console.virtio_console_fd;
-	console_poll[VIRTIO_CONSOLE_FD].events = POLLIN;
-
-	if (MAP_FAILED == init_vr(mic, mic->mic_console.virtio_console_fd,
-				  VIRTIO_ID_CONSOLE, &tx_vr, &rx_vr,
-		virtcons_dev_page.dd.num_vq)) {
-		mpsslog("%s init_vr failed %s\n",
-			mic->name, strerror(errno));
-		goto _close_pty;
-	}
-
-	copy.iovcnt = 1;
-	desc = get_device_desc(mic, VIRTIO_ID_CONSOLE);
-
-	for (;;) {
-		console_poll[MONITOR_FD].revents = 0;
-		console_poll[VIRTIO_CONSOLE_FD].revents = 0;
-		err = poll(console_poll, MAX_CONSOLE_FD, -1);
-		if (err < 0) {
-			mpsslog("%s %d: poll failed: %s\n", __func__, __LINE__,
-				strerror(errno));
-			continue;
-		}
-		if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK))
-			wait_for_card_driver(mic,
-					     mic->mic_console.virtio_console_fd,
-				VIRTIO_ID_CONSOLE);
-
-		if (console_poll[MONITOR_FD].revents & POLLIN) {
-			copy.iov = iov0;
-			len = readv(pty_fd, copy.iov, copy.iovcnt);
-			if (len > 0) {
-#ifdef DEBUG
-				disp_iovec(mic, copy, __func__, __LINE__);
-				mpsslog("%s %s %d read from tap 0x%lx\n",
-					mic->name, __func__, __LINE__,
-					len);
-#endif
-				spin_for_descriptors(mic, &tx_vr);
-				txrx_prepare(VIRTIO_ID_CONSOLE, 1, &tx_vr,
-					     &copy, len);
-
-				err = mic_virtio_copy(mic,
-					mic->mic_console.virtio_console_fd,
-					&tx_vr, &copy);
-				if (err < 0) {
-					mpsslog("%s %s %d mic_virtio_copy %s\n",
-						mic->name, __func__, __LINE__,
-						strerror(errno));
-				}
-				if (!err)
-					verify_out_len(mic, &copy);
-#ifdef DEBUG
-				disp_iovec(mic, copy, __func__, __LINE__);
-				mpsslog("%s %s %d wrote to net 0x%lx\n",
-					mic->name, __func__, __LINE__,
-					sum_iovec_len(copy));
-#endif
-				/* Reinitialize IOV for next run */
-				iov0->iov_len = PAGE_SIZE;
-			} else if (len < 0) {
-				disp_iovec(mic, &copy, __func__, __LINE__);
-				mpsslog("%s %s %d read failed %s ",
-					mic->name, __func__, __LINE__,
-					strerror(errno));
-				mpsslog("cnt %d sum %zd\n",
-					copy.iovcnt, sum_iovec_len(&copy));
-			}
-		}
-
-		if (console_poll[VIRTIO_CONSOLE_FD].revents & POLLIN) {
-			while (rx_vr.info->avail_idx !=
-				le16toh(rx_vr.vr.avail->idx)) {
-				copy.iov = iov1;
-				txrx_prepare(VIRTIO_ID_CONSOLE, 0, &rx_vr,
-					     &copy, PAGE_SIZE);
-
-				err = mic_virtio_copy(mic,
-					mic->mic_console.virtio_console_fd,
-					&rx_vr, &copy);
-				if (!err) {
-					/* Set the correct output iov_len */
-					iov1->iov_len = copy.out_len;
-					verify_out_len(mic, &copy);
-#ifdef DEBUG
-					disp_iovec(mic, copy, __func__,
-						   __LINE__);
-					mpsslog("%s %s %d ",
-						mic->name, __func__, __LINE__);
-					mpsslog("read from net 0x%lx\n",
-						sum_iovec_len(copy));
-#endif
-					len = writev(pty_fd,
-						copy.iov, copy.iovcnt);
-					if (len != sum_iovec_len(&copy)) {
-						mpsslog("Tun write failed %s ",
-							strerror(errno));
-						mpsslog("len 0x%zx ", len);
-						mpsslog("read_len 0x%zx\n",
-							sum_iovec_len(&copy));
-					} else {
-#ifdef DEBUG
-						disp_iovec(mic, copy, __func__,
-							   __LINE__);
-						mpsslog("%s %s %d ",
-							mic->name, __func__,
-							__LINE__);
-						mpsslog("wrote to tap 0x%lx\n",
-							len);
-#endif
-					}
-				} else {
-					mpsslog("%s %s %d mic_virtio_copy %s\n",
-						mic->name, __func__, __LINE__,
-						strerror(errno));
-					break;
-				}
-			}
-		}
-		if (console_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
-			mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
-	}
-_close_pty:
-	close(pty_fd);
-_return:
-	pthread_exit(NULL);
-}
-
-static void
-add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd)
-{
-	char path[PATH_MAX];
-	int fd, err;
-
-	snprintf(path, PATH_MAX, "/dev/mic%d", mic->id);
-	fd = open(path, O_RDWR);
-	if (fd < 0) {
-		mpsslog("Could not open %s %s\n", path, strerror(errno));
-		return;
-	}
-
-	err = ioctl(fd, MIC_VIRTIO_ADD_DEVICE, dd);
-	if (err < 0) {
-		mpsslog("Could not add %d %s\n", dd->type, strerror(errno));
-		close(fd);
-		return;
-	}
-	switch (dd->type) {
-	case VIRTIO_ID_NET:
-		mic->mic_net.virtio_net_fd = fd;
-		mpsslog("Added VIRTIO_ID_NET for %s\n", mic->name);
-		break;
-	case VIRTIO_ID_CONSOLE:
-		mic->mic_console.virtio_console_fd = fd;
-		mpsslog("Added VIRTIO_ID_CONSOLE for %s\n", mic->name);
-		break;
-	case VIRTIO_ID_BLOCK:
-		mic->mic_virtblk.virtio_block_fd = fd;
-		mpsslog("Added VIRTIO_ID_BLOCK for %s\n", mic->name);
-		break;
-	}
-}
-
-static bool
-set_backend_file(struct mic_info *mic)
-{
-	FILE *config;
-	char buff[PATH_MAX], *line, *evv, *p;
-
-	snprintf(buff, PATH_MAX, "%s/mpssd%03d.conf", mic_config_dir, mic->id);
-	config = fopen(buff, "r");
-	if (config == NULL)
-		return false;
-	do {  /* look for "virtblk_backend=XXXX" */
-		line = fgets(buff, PATH_MAX, config);
-		if (line == NULL)
-			break;
-		if (*line == '#')
-			continue;
-		p = strchr(line, '\n');
-		if (p)
-			*p = '\0';
-	} while (strncmp(line, virtblk_backend, strlen(virtblk_backend)) != 0);
-	fclose(config);
-	if (line == NULL)
-		return false;
-	evv = strchr(line, '=');
-	if (evv == NULL)
-		return false;
-	mic->mic_virtblk.backend_file = malloc(strlen(evv) + 1);
-	if (mic->mic_virtblk.backend_file == NULL) {
-		mpsslog("%s %d can't allocate memory\n", mic->name, mic->id);
-		return false;
-	}
-	strcpy(mic->mic_virtblk.backend_file, evv + 1);
-	return true;
-}
-
-#define SECTOR_SIZE 512
-static bool
-set_backend_size(struct mic_info *mic)
-{
-	mic->mic_virtblk.backend_size = lseek(mic->mic_virtblk.backend, 0,
-		SEEK_END);
-	if (mic->mic_virtblk.backend_size < 0) {
-		mpsslog("%s: can't seek: %s\n",
-			mic->name, mic->mic_virtblk.backend_file);
-		return false;
-	}
-	virtblk_dev_page.blk_config.capacity =
-		mic->mic_virtblk.backend_size / SECTOR_SIZE;
-	if ((mic->mic_virtblk.backend_size % SECTOR_SIZE) != 0)
-		virtblk_dev_page.blk_config.capacity++;
-
-	virtblk_dev_page.blk_config.capacity =
-		htole64(virtblk_dev_page.blk_config.capacity);
-
-	return true;
-}
-
-static bool
-open_backend(struct mic_info *mic)
-{
-	if (!set_backend_file(mic))
-		goto _error_exit;
-	mic->mic_virtblk.backend = open(mic->mic_virtblk.backend_file, O_RDWR);
-	if (mic->mic_virtblk.backend < 0) {
-		mpsslog("%s: can't open: %s\n", mic->name,
-			mic->mic_virtblk.backend_file);
-		goto _error_free;
-	}
-	if (!set_backend_size(mic))
-		goto _error_close;
-	mic->mic_virtblk.backend_addr = mmap(NULL,
-		mic->mic_virtblk.backend_size,
-		PROT_READ|PROT_WRITE, MAP_SHARED,
-		mic->mic_virtblk.backend, 0L);
-	if (mic->mic_virtblk.backend_addr == MAP_FAILED) {
-		mpsslog("%s: can't map: %s %s\n",
-			mic->name, mic->mic_virtblk.backend_file,
-			strerror(errno));
-		goto _error_close;
-	}
-	return true;
-
- _error_close:
-	close(mic->mic_virtblk.backend);
- _error_free:
-	free(mic->mic_virtblk.backend_file);
- _error_exit:
-	return false;
-}
-
-static void
-close_backend(struct mic_info *mic)
-{
-	munmap(mic->mic_virtblk.backend_addr, mic->mic_virtblk.backend_size);
-	close(mic->mic_virtblk.backend);
-	free(mic->mic_virtblk.backend_file);
-}
-
-static bool
-start_virtblk(struct mic_info *mic, struct mic_vring *vring)
-{
-	if (((unsigned long)&virtblk_dev_page.blk_config % 8) != 0) {
-		mpsslog("%s: blk_config is not 8 byte aligned.\n",
-			mic->name);
-		return false;
-	}
-	add_virtio_device(mic, &virtblk_dev_page.dd);
-	if (MAP_FAILED == init_vr(mic, mic->mic_virtblk.virtio_block_fd,
-				  VIRTIO_ID_BLOCK, vring, NULL,
-				  virtblk_dev_page.dd.num_vq)) {
-		mpsslog("%s init_vr failed %s\n",
-			mic->name, strerror(errno));
-		return false;
-	}
-	return true;
-}
-
-static void
-stop_virtblk(struct mic_info *mic)
-{
-	int vr_size, ret;
-
-	vr_size = PAGE_ALIGN(vring_size(MIC_VRING_ENTRIES,
-		MIC_VIRTIO_RING_ALIGN) + sizeof(struct _mic_vring_info));
-	ret = munmap(mic->mic_virtblk.block_dp,
-		MIC_DEVICE_PAGE_END + vr_size * virtblk_dev_page.dd.num_vq);
-	if (ret < 0)
-		mpsslog("%s munmap errno %d\n", mic->name, errno);
-	close(mic->mic_virtblk.virtio_block_fd);
-}
-
-static __u8
-header_error_check(struct vring_desc *desc)
-{
-	if (le32toh(desc->len) != sizeof(struct virtio_blk_outhdr)) {
-		mpsslog("%s() %d: length is not sizeof(virtio_blk_outhd)\n",
-			__func__, __LINE__);
-		return -EIO;
-	}
-	if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT)) {
-		mpsslog("%s() %d: alone\n",
-			__func__, __LINE__);
-		return -EIO;
-	}
-	if (le16toh(desc->flags) & VRING_DESC_F_WRITE) {
-		mpsslog("%s() %d: not read\n",
-			__func__, __LINE__);
-		return -EIO;
-	}
-	return 0;
-}
-
-static int
-read_header(int fd, struct virtio_blk_outhdr *hdr, __u32 desc_idx)
-{
-	struct iovec iovec;
-	struct mic_copy_desc copy;
-
-	iovec.iov_len = sizeof(*hdr);
-	iovec.iov_base = hdr;
-	copy.iov = &iovec;
-	copy.iovcnt = 1;
-	copy.vr_idx = 0;  /* only one vring on virtio_block */
-	copy.update_used = false;  /* do not update used index */
-	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
-}
-
-static int
-transfer_blocks(int fd, struct iovec *iovec, __u32 iovcnt)
-{
-	struct mic_copy_desc copy;
-
-	copy.iov = iovec;
-	copy.iovcnt = iovcnt;
-	copy.vr_idx = 0;  /* only one vring on virtio_block */
-	copy.update_used = false;  /* do not update used index */
-	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
-}
-
-static __u8
-status_error_check(struct vring_desc *desc)
-{
-	if (le32toh(desc->len) != sizeof(__u8)) {
-		mpsslog("%s() %d: length is not sizeof(status)\n",
-			__func__, __LINE__);
-		return -EIO;
-	}
-	return 0;
-}
-
-static int
-write_status(int fd, __u8 *status)
-{
-	struct iovec iovec;
-	struct mic_copy_desc copy;
-
-	iovec.iov_base = status;
-	iovec.iov_len = sizeof(*status);
-	copy.iov = &iovec;
-	copy.iovcnt = 1;
-	copy.vr_idx = 0;  /* only one vring on virtio_block */
-	copy.update_used = true; /* Update used index */
-	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
-}
-
-static void *
-virtio_block(void *arg)
-{
-	struct mic_info *mic = (struct mic_info *)arg;
-	int ret;
-	struct pollfd block_poll;
-	struct mic_vring vring;
-	__u16 avail_idx;
-	__u32 desc_idx;
-	struct vring_desc *desc;
-	struct iovec *iovec, *piov;
-	__u8 status;
-	__u32 buffer_desc_idx;
-	struct virtio_blk_outhdr hdr;
-	void *fos;
-
-	for (;;) {  /* forever */
-		if (!open_backend(mic)) { /* No virtblk */
-			for (mic->mic_virtblk.signaled = 0;
-				!mic->mic_virtblk.signaled;)
-				sleep(1);
-			continue;
-		}
-
-		/* backend file is specified. */
-		if (!start_virtblk(mic, &vring))
-			goto _close_backend;
-		iovec = malloc(sizeof(*iovec) *
-			le32toh(virtblk_dev_page.blk_config.seg_max));
-		if (!iovec) {
-			mpsslog("%s: can't alloc iovec: %s\n",
-				mic->name, strerror(ENOMEM));
-			goto _stop_virtblk;
-		}
-
-		block_poll.fd = mic->mic_virtblk.virtio_block_fd;
-		block_poll.events = POLLIN;
-		for (mic->mic_virtblk.signaled = 0;
-		     !mic->mic_virtblk.signaled;) {
-			block_poll.revents = 0;
-					/* timeout in 1 sec to see signaled */
-			ret = poll(&block_poll, 1, 1000);
-			if (ret < 0) {
-				mpsslog("%s %d: poll failed: %s\n",
-					__func__, __LINE__,
-					strerror(errno));
-				continue;
-			}
-
-			if (!(block_poll.revents & POLLIN)) {
-#ifdef DEBUG
-				mpsslog("%s %d: block_poll.revents=0x%x\n",
-					__func__, __LINE__, block_poll.revents);
-#endif
-				continue;
-			}
-
-			/* POLLIN */
-			while (vring.info->avail_idx !=
-				le16toh(vring.vr.avail->idx)) {
-				/* read header element */
-				avail_idx =
-					vring.info->avail_idx &
-					(vring.vr.num - 1);
-				desc_idx = le16toh(
-					vring.vr.avail->ring[avail_idx]);
-				desc = &vring.vr.desc[desc_idx];
-#ifdef DEBUG
-				mpsslog("%s() %d: avail_idx=%d ",
-					__func__, __LINE__,
-					vring.info->avail_idx);
-				mpsslog("vring.vr.num=%d desc=%p\n",
-					vring.vr.num, desc);
-#endif
-				status = header_error_check(desc);
-				ret = read_header(
-					mic->mic_virtblk.virtio_block_fd,
-					&hdr, desc_idx);
-				if (ret < 0) {
-					mpsslog("%s() %d %s: ret=%d %s\n",
-						__func__, __LINE__,
-						mic->name, ret,
-						strerror(errno));
-					break;
-				}
-				/* buffer element */
-				piov = iovec;
-				status = 0;
-				fos = mic->mic_virtblk.backend_addr +
-					(hdr.sector * SECTOR_SIZE);
-				buffer_desc_idx = next_desc(desc);
-				desc_idx = buffer_desc_idx;
-				for (desc = &vring.vr.desc[buffer_desc_idx];
-				     desc->flags & VRING_DESC_F_NEXT;
-				     desc_idx = next_desc(desc),
-					     desc = &vring.vr.desc[desc_idx]) {
-					piov->iov_len = desc->len;
-					piov->iov_base = fos;
-					piov++;
-					fos += desc->len;
-				}
-				/* Returning NULLs for VIRTIO_BLK_T_GET_ID. */
-				if (hdr.type & ~(VIRTIO_BLK_T_OUT |
-					VIRTIO_BLK_T_GET_ID)) {
-					/*
-					  VIRTIO_BLK_T_IN - does not do
-					  anything. Probably for documenting.
-					  VIRTIO_BLK_T_SCSI_CMD - for
-					  virtio_scsi.
-					  VIRTIO_BLK_T_FLUSH - turned off in
-					  config space.
-					  VIRTIO_BLK_T_BARRIER - defined but not
-					  used in anywhere.
-					*/
-					mpsslog("%s() %d: type %x ",
-						__func__, __LINE__,
-						hdr.type);
-					mpsslog("is not supported\n");
-					status = -ENOTSUP;
-
-				} else {
-					ret = transfer_blocks(
-					mic->mic_virtblk.virtio_block_fd,
-						iovec,
-						piov - iovec);
-					if (ret < 0 &&
-					    status != 0)
-						status = ret;
-				}
-				/* write status and update used pointer */
-				if (status != 0)
-					status = status_error_check(desc);
-				ret = write_status(
-					mic->mic_virtblk.virtio_block_fd,
-					&status);
-#ifdef DEBUG
-				mpsslog("%s() %d: write status=%d on desc=%p\n",
-					__func__, __LINE__,
-					status, desc);
-#endif
-			}
-		}
-		free(iovec);
-_stop_virtblk:
-		stop_virtblk(mic);
-_close_backend:
-		close_backend(mic);
-	}  /* forever */
-
-	pthread_exit(NULL);
-}
-
-static void
-reset(struct mic_info *mic)
-{
-#define RESET_TIMEOUT 120
-	int i = RESET_TIMEOUT;
-	setsysfs(mic->name, "state", "reset");
-	while (i) {
-		char *state;
-		state = readsysfs(mic->name, "state");
-		if (!state)
-			goto retry;
-		mpsslog("%s: %s %d state %s\n",
-			mic->name, __func__, __LINE__, state);
-
-		/*
-		 * If the shutdown was initiated by OSPM, the state stays
-		 * in "suspended" which is also a valid condition for reset.
-		 */
-		if ((!strcmp(state, "offline")) ||
-		    (!strcmp(state, "suspended"))) {
-			free(state);
-			break;
-		}
-		free(state);
-retry:
-		sleep(1);
-		i--;
-	}
-}
-
-static int
-get_mic_shutdown_status(struct mic_info *mic, char *shutdown_status)
-{
-	if (!strcmp(shutdown_status, "nop"))
-		return MIC_NOP;
-	if (!strcmp(shutdown_status, "crashed"))
-		return MIC_CRASHED;
-	if (!strcmp(shutdown_status, "halted"))
-		return MIC_HALTED;
-	if (!strcmp(shutdown_status, "poweroff"))
-		return MIC_POWER_OFF;
-	if (!strcmp(shutdown_status, "restart"))
-		return MIC_RESTART;
-	mpsslog("%s: BUG invalid status %s\n", mic->name, shutdown_status);
-	/* Invalid state */
-	assert(0);
-};
-
-static int get_mic_state(struct mic_info *mic, char *state)
-{
-	if (!strcmp(state, "offline"))
-		return MIC_OFFLINE;
-	if (!strcmp(state, "online"))
-		return MIC_ONLINE;
-	if (!strcmp(state, "shutting_down"))
-		return MIC_SHUTTING_DOWN;
-	if (!strcmp(state, "reset_failed"))
-		return MIC_RESET_FAILED;
-	if (!strcmp(state, "suspending"))
-		return MIC_SUSPENDING;
-	if (!strcmp(state, "suspended"))
-		return MIC_SUSPENDED;
-	mpsslog("%s: BUG invalid state %s\n", mic->name, state);
-	/* Invalid state */
-	assert(0);
-};
-
-static void mic_handle_shutdown(struct mic_info *mic)
-{
-#define SHUTDOWN_TIMEOUT 60
-	int i = SHUTDOWN_TIMEOUT, ret, stat = 0;
-	char *shutdown_status;
-	while (i) {
-		shutdown_status = readsysfs(mic->name, "shutdown_status");
-		if (!shutdown_status)
-			continue;
-		mpsslog("%s: %s %d shutdown_status %s\n",
-			mic->name, __func__, __LINE__, shutdown_status);
-		switch (get_mic_shutdown_status(mic, shutdown_status)) {
-		case MIC_RESTART:
-			mic->restart = 1;
-		case MIC_HALTED:
-		case MIC_POWER_OFF:
-		case MIC_CRASHED:
-			free(shutdown_status);
-			goto reset;
-		default:
-			break;
-		}
-		free(shutdown_status);
-		sleep(1);
-		i--;
-	}
-reset:
-	ret = kill(mic->pid, SIGTERM);
-	mpsslog("%s: %s %d kill pid %d ret %d\n",
-		mic->name, __func__, __LINE__,
-		mic->pid, ret);
-	if (!ret) {
-		ret = waitpid(mic->pid, &stat,
-			WIFSIGNALED(stat));
-		mpsslog("%s: %s %d waitpid ret %d pid %d\n",
-			mic->name, __func__, __LINE__,
-			ret, mic->pid);
-	}
-	if (ret == mic->pid)
-		reset(mic);
-}
-
-static void *
-mic_config(void *arg)
-{
-	struct mic_info *mic = (struct mic_info *)arg;
-	char *state = NULL;
-	char pathname[PATH_MAX];
-	int fd, ret;
-	struct pollfd ufds[1];
-	char value[4096];
-
-	snprintf(pathname, PATH_MAX - 1, "%s/%s/%s",
-		 MICSYSFSDIR, mic->name, "state");
-
-	fd = open(pathname, O_RDONLY);
-	if (fd < 0) {
-		mpsslog("%s: opening file %s failed %s\n",
-			mic->name, pathname, strerror(errno));
-		goto error;
-	}
-
-	do {
-		ret = lseek(fd, 0, SEEK_SET);
-		if (ret < 0) {
-			mpsslog("%s: Failed to seek to file start '%s': %s\n",
-				mic->name, pathname, strerror(errno));
-			goto close_error1;
-		}
-		ret = read(fd, value, sizeof(value));
-		if (ret < 0) {
-			mpsslog("%s: Failed to read sysfs entry '%s': %s\n",
-				mic->name, pathname, strerror(errno));
-			goto close_error1;
-		}
-retry:
-		state = readsysfs(mic->name, "state");
-		if (!state)
-			goto retry;
-		mpsslog("%s: %s %d state %s\n",
-			mic->name, __func__, __LINE__, state);
-		switch (get_mic_state(mic, state)) {
-		case MIC_SHUTTING_DOWN:
-			mic_handle_shutdown(mic);
-			goto close_error;
-		case MIC_SUSPENDING:
-			mic->boot_on_resume = 1;
-			setsysfs(mic->name, "state", "suspend");
-			mic_handle_shutdown(mic);
-			goto close_error;
-		case MIC_OFFLINE:
-			if (mic->boot_on_resume) {
-				setsysfs(mic->name, "state", "boot");
-				mic->boot_on_resume = 0;
-			}
-			break;
-		default:
-			break;
-		}
-		free(state);
-
-		ufds[0].fd = fd;
-		ufds[0].events = POLLERR | POLLPRI;
-		ret = poll(ufds, 1, -1);
-		if (ret < 0) {
-			mpsslog("%s: poll failed %s\n",
-				mic->name, strerror(errno));
-			goto close_error1;
-		}
-	} while (1);
-close_error:
-	free(state);
-close_error1:
-	close(fd);
-error:
-	init_mic(mic);
-	pthread_exit(NULL);
-}
-
-static void
-set_cmdline(struct mic_info *mic)
-{
-	char buffer[PATH_MAX];
-	int len;
-
-	len = snprintf(buffer, PATH_MAX,
-		"clocksource=tsc highres=off nohz=off ");
-	len += snprintf(buffer + len, PATH_MAX - len,
-		"cpufreq_on;corec6_off;pc3_off;pc6_off ");
-	len += snprintf(buffer + len, PATH_MAX - len,
-		"ifcfg=static;address,172.31.%d.1;netmask,255.255.255.0",
-		mic->id);
-
-	setsysfs(mic->name, "cmdline", buffer);
-	mpsslog("%s: Command line: \"%s\"\n", mic->name, buffer);
-	snprintf(buffer, PATH_MAX, "172.31.%d.1", mic->id);
-	mpsslog("%s: IPADDR: \"%s\"\n", mic->name, buffer);
-}
-
-static void
-set_log_buf_info(struct mic_info *mic)
-{
-	int fd;
-	off_t len;
-	char system_map[] = "/lib/firmware/mic/System.map";
-	char *map, *temp, log_buf[17] = {'\0'};
-
-	fd = open(system_map, O_RDONLY);
-	if (fd < 0) {
-		mpsslog("%s: Opening System.map failed: %d\n",
-			mic->name, errno);
-		return;
-	}
-	len = lseek(fd, 0, SEEK_END);
-	if (len < 0) {
-		mpsslog("%s: Reading System.map size failed: %d\n",
-			mic->name, errno);
-		close(fd);
-		return;
-	}
-	map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
-	if (map == MAP_FAILED) {
-		mpsslog("%s: mmap of System.map failed: %d\n",
-			mic->name, errno);
-		close(fd);
-		return;
-	}
-	temp = strstr(map, "__log_buf");
-	if (!temp) {
-		mpsslog("%s: __log_buf not found: %d\n", mic->name, errno);
-		munmap(map, len);
-		close(fd);
-		return;
-	}
-	strncpy(log_buf, temp - 19, 16);
-	setsysfs(mic->name, "log_buf_addr", log_buf);
-	mpsslog("%s: log_buf_addr: %s\n", mic->name, log_buf);
-	temp = strstr(map, "log_buf_len");
-	if (!temp) {
-		mpsslog("%s: log_buf_len not found: %d\n", mic->name, errno);
-		munmap(map, len);
-		close(fd);
-		return;
-	}
-	strncpy(log_buf, temp - 19, 16);
-	setsysfs(mic->name, "log_buf_len", log_buf);
-	mpsslog("%s: log_buf_len: %s\n", mic->name, log_buf);
-	munmap(map, len);
-	close(fd);
-}
-
-static void init_mic(struct mic_info *mic);
-
-static void
-change_virtblk_backend(int x, siginfo_t *siginfo, void *p)
-{
-	struct mic_info *mic;
-
-	for (mic = mic_list.next; mic != NULL; mic = mic->next)
-		mic->mic_virtblk.signaled = 1/* true */;
-}
-
-static void
-init_mic(struct mic_info *mic)
-{
-	struct sigaction ignore = {
-		.sa_flags = 0,
-		.sa_handler = SIG_IGN
-	};
-	struct sigaction act = {
-		.sa_flags = SA_SIGINFO,
-		.sa_sigaction = change_virtblk_backend,
-	};
-	char buffer[PATH_MAX];
-	int err;
-
-	/*
-	 * Currently, one virtio block device is supported for each MIC card
-	 * at a time. Any user (or test) can send a SIGUSR1 to the MIC daemon.
-	 * The signal informs the virtio block backend about a change in the
-	 * configuration file which specifies the virtio backend file name on
-	 * the host. Virtio block backend then re-reads the configuration file
-	 * and switches to the new block device. This signalling mechanism may
-	 * not be required once multiple virtio block devices are supported by
-	 * the MIC daemon.
-	 */
-	sigaction(SIGUSR1, &ignore, NULL);
-
-	mic->pid = fork();
-	switch (mic->pid) {
-	case 0:
-		set_log_buf_info(mic);
-		set_cmdline(mic);
-		add_virtio_device(mic, &virtcons_dev_page.dd);
-		add_virtio_device(mic, &virtnet_dev_page.dd);
-		err = pthread_create(&mic->mic_console.console_thread, NULL,
-			virtio_console, mic);
-		if (err)
-			mpsslog("%s virtcons pthread_create failed %s\n",
-				mic->name, strerror(err));
-		err = pthread_create(&mic->mic_net.net_thread, NULL,
-			virtio_net, mic);
-		if (err)
-			mpsslog("%s virtnet pthread_create failed %s\n",
-				mic->name, strerror(err));
-		err = pthread_create(&mic->mic_virtblk.block_thread, NULL,
-			virtio_block, mic);
-		if (err)
-			mpsslog("%s virtblk pthread_create failed %s\n",
-				mic->name, strerror(err));
-		sigemptyset(&act.sa_mask);
-		err = sigaction(SIGUSR1, &act, NULL);
-		if (err)
-			mpsslog("%s sigaction SIGUSR1 failed %s\n",
-				mic->name, strerror(errno));
-		while (1)
-			sleep(60);
-	case -1:
-		mpsslog("fork failed MIC name %s id %d errno %d\n",
-			mic->name, mic->id, errno);
-		break;
-	default:
-		if (mic->restart) {
-			snprintf(buffer, PATH_MAX, "boot");
-			setsysfs(mic->name, "state", buffer);
-			mpsslog("%s restarting mic %d\n",
-				mic->name, mic->restart);
-			mic->restart = 0;
-		}
-		pthread_create(&mic->config_thread, NULL, mic_config, mic);
-	}
-}
-
-static void
-start_daemon(void)
-{
-	struct mic_info *mic;
-
-	for (mic = mic_list.next; mic != NULL; mic = mic->next)
-		init_mic(mic);
-
-	while (1)
-		sleep(60);
-}
-
-static int
-init_mic_list(void)
-{
-	struct mic_info *mic = &mic_list;
-	struct dirent *file;
-	DIR *dp;
-	int cnt = 0;
-
-	dp = opendir(MICSYSFSDIR);
-	if (!dp)
-		return 0;
-
-	while ((file = readdir(dp)) != NULL) {
-		if (!strncmp(file->d_name, "mic", 3)) {
-			mic->next = calloc(1, sizeof(struct mic_info));
-			if (mic->next) {
-				mic = mic->next;
-				mic->id = atoi(&file->d_name[3]);
-				mic->name = malloc(strlen(file->d_name) + 16);
-				if (mic->name)
-					strcpy(mic->name, file->d_name);
-				mpsslog("MIC name %s id %d\n", mic->name,
-					mic->id);
-				cnt++;
-			}
-		}
-	}
-
-	closedir(dp);
-	return cnt;
-}
-
-void
-mpsslog(char *format, ...)
-{
-	va_list args;
-	char buffer[4096];
-	char ts[52], *ts1;
-	time_t t;
-
-	if (logfp == NULL)
-		return;
-
-	va_start(args, format);
-	vsprintf(buffer, format, args);
-	va_end(args);
-
-	time(&t);
-	ts1 = ctime_r(&t, ts);
-	ts1[strlen(ts1) - 1] = '\0';
-	fprintf(logfp, "%s: %s", ts1, buffer);
-
-	fflush(logfp);
-}
-
-int
-main(int argc, char *argv[])
-{
-	int cnt;
-	pid_t pid;
-
-	myname = argv[0];
-
-	logfp = fopen(LOGFILE_NAME, "a+");
-	if (!logfp) {
-		fprintf(stderr, "cannot open logfile '%s'\n", LOGFILE_NAME);
-		exit(1);
-	}
-	pid = fork();
-	switch (pid) {
-	case 0:
-		break;
-	case -1:
-		exit(2);
-	default:
-		exit(0);
-	}
-
-	mpsslog("MIC Daemon start\n");
-
-	cnt = init_mic_list();
-	if (cnt == 0) {
-		mpsslog("MIC module not loaded\n");
-		exit(3);
-	}
-	mpsslog("MIC found %d devices\n", cnt);
-
-	start_daemon();
-
-	exit(0);
-}
--- a/Documentation/mic/mpssd/mpssd.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC User Space Tools.
- */
-#ifndef _MPSSD_H_
-#define _MPSSD_H_
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <libgen.h>
-#include <pthread.h>
-#include <stdarg.h>
-#include <time.h>
-#include <errno.h>
-#include <sys/dir.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/utsname.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <pthread.h>
-#include <signal.h>
-#include <limits.h>
-#include <syslog.h>
-#include <getopt.h>
-#include <net/if.h>
-#include <linux/if_tun.h>
-#include <linux/if_tun.h>
-#include <linux/virtio_ids.h>
-
-#define MICSYSFSDIR "/sys/class/mic"
-#define LOGFILE_NAME "/var/log/mpssd"
-#define PAGE_SIZE 4096
-
-struct mic_console_info {
-	pthread_t       console_thread;
-	int		virtio_console_fd;
-	void		*console_dp;
-};
-
-struct mic_net_info {
-	pthread_t       net_thread;
-	int		virtio_net_fd;
-	int		tap_fd;
-	void		*net_dp;
-};
-
-struct mic_virtblk_info {
-	pthread_t       block_thread;
-	int		virtio_block_fd;
-	void		*block_dp;
-	volatile sig_atomic_t	signaled;
-	char		*backend_file;
-	int		backend;
-	void		*backend_addr;
-	long		backend_size;
-};
-
-struct mic_info {
-	int		id;
-	char		*name;
-	pthread_t       config_thread;
-	pid_t		pid;
-	struct mic_console_info	mic_console;
-	struct mic_net_info	mic_net;
-	struct mic_virtblk_info	mic_virtblk;
-	int		restart;
-	int		boot_on_resume;
-	struct mic_info *next;
-};
-
-__attribute__((format(printf, 1, 2)))
-void mpsslog(char *format, ...);
-char *readsysfs(char *dir, char *entry);
-int setsysfs(char *dir, char *entry, char *value);
-#endif
--- a/Documentation/mic/mpssd/sysfs.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC User Space Tools.
- */
-
-#include "mpssd.h"
-
-#define PAGE_SIZE 4096
-
-char *
-readsysfs(char *dir, char *entry)
-{
-	char filename[PATH_MAX];
-	char value[PAGE_SIZE];
-	char *string = NULL;
-	int fd;
-	int len;
-
-	if (dir == NULL)
-		snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
-	else
-		snprintf(filename, PATH_MAX,
-			 "%s/%s/%s", MICSYSFSDIR, dir, entry);
-
-	fd = open(filename, O_RDONLY);
-	if (fd < 0) {
-		mpsslog("Failed to open sysfs entry '%s': %s\n",
-			filename, strerror(errno));
-		return NULL;
-	}
-
-	len = read(fd, value, sizeof(value));
-	if (len < 0) {
-		mpsslog("Failed to read sysfs entry '%s': %s\n",
-			filename, strerror(errno));
-		goto readsys_ret;
-	}
-	if (len == 0)
-		goto readsys_ret;
-
-	value[len - 1] = '\0';
-
-	string = malloc(strlen(value) + 1);
-	if (string)
-		strcpy(string, value);
-
-readsys_ret:
-	close(fd);
-	return string;
-}
-
-int
-setsysfs(char *dir, char *entry, char *value)
-{
-	char filename[PATH_MAX];
-	char *oldvalue;
-	int fd, ret = 0;
-
-	if (dir == NULL)
-		snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
-	else
-		snprintf(filename, PATH_MAX, "%s/%s/%s",
-			 MICSYSFSDIR, dir, entry);
-
-	oldvalue = readsysfs(dir, entry);
-
-	fd = open(filename, O_RDWR);
-	if (fd < 0) {
-		ret = errno;
-		mpsslog("Failed to open sysfs entry '%s': %s\n",
-			filename, strerror(errno));
-		goto done;
-	}
-
-	if (!oldvalue || strcmp(value, oldvalue)) {
-		if (write(fd, value, strlen(value)) < 0) {
-			ret = errno;
-			mpsslog("Failed to write new sysfs entry '%s': %s\n",
-				filename, strerror(errno));
-		}
-	}
-	close(fd);
-done:
-	if (oldvalue)
-		free(oldvalue);
-	return ret;
-}
--- /dev/null
+++ b/samples/mic/mpssd/.gitignore
@@ -0,0 +1 @@
+mpssd
--- /dev/null
+++ b/samples/mic/mpssd/Makefile
@@ -0,0 +1,27 @@
+ifndef CROSS_COMPILE
+uname_M := $(shell uname -m 2>/dev/null || echo not)
+ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
+
+ifeq ($(ARCH),x86)
+
+PROGS := mpssd
+CC = $(CROSS_COMPILE)gcc
+CFLAGS := -I../../../usr/include -I../../../tools/include
+
+ifdef DEBUG
+CFLAGS += -DDEBUG=$(DEBUG)
+endif
+
+all: $(PROGS)
+mpssd: mpssd.c sysfs.c
+	$(CC) $(CFLAGS) mpssd.c sysfs.c -o mpssd -lpthread
+
+install:
+	install mpssd /usr/sbin/mpssd
+	install micctrl /usr/sbin/micctrl
+
+clean:
+	rm -fr $(PROGS)
+
+endif
+endif
--- /dev/null
+++ b/samples/mic/mpssd/micctrl
@@ -0,0 +1,173 @@
+#!/bin/bash
+# Intel MIC Platform Software Stack (MPSS)
+#
+# Copyright(c) 2013 Intel Corporation.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2, as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# The full GNU General Public License is included in this distribution in
+# the file called "COPYING".
+#
+# Intel MIC User Space Tools.
+#
+# micctrl - Controls MIC boot/start/stop.
+#
+# chkconfig: 2345 95 05
+# description: start MPSS stack processing.
+#
+### BEGIN INIT INFO
+# Provides: micctrl
+### END INIT INFO
+
+# Source function library.
+. /etc/init.d/functions
+
+sysfs="/sys/class/mic"
+
+_status()
+{
+	f=$sysfs/$1
+	echo -e $1 state: "`cat $f/state`" shutdown_status: "`cat $f/shutdown_status`"
+}
+
+status()
+{
+	if [ "`echo $1 | head -c3`" == "mic" ]; then
+		_status $1
+		return $?
+	fi
+	for f in $sysfs/*
+	do
+		_status `basename $f`
+		RETVAL=$?
+		[ $RETVAL -ne 0 ] && return $RETVAL
+	done
+	return 0
+}
+
+_reset()
+{
+	f=$sysfs/$1
+	echo reset > $f/state
+}
+
+reset()
+{
+	if [ "`echo $1 | head -c3`" == "mic" ]; then
+		_reset $1
+		return $?
+	fi
+	for f in $sysfs/*
+	do
+		_reset `basename $f`
+		RETVAL=$?
+		[ $RETVAL -ne 0 ] && return $RETVAL
+	done
+	return 0
+}
+
+_boot()
+{
+	f=$sysfs/$1
+	echo "linux" > $f/bootmode
+	echo "mic/uos.img" > $f/firmware
+	echo "mic/$1.image" > $f/ramdisk
+	echo "boot" > $f/state
+}
+
+boot()
+{
+	if [ "`echo $1 | head -c3`" == "mic" ]; then
+		_boot $1
+		return $?
+	fi
+	for f in $sysfs/*
+	do
+		_boot `basename $f`
+		RETVAL=$?
+		[ $RETVAL -ne 0 ] && return $RETVAL
+	done
+	return 0
+}
+
+_shutdown()
+{
+	f=$sysfs/$1
+	echo shutdown > $f/state
+}
+
+shutdown()
+{
+	if [ "`echo $1 | head -c3`" == "mic" ]; then
+		_shutdown $1
+		return $?
+	fi
+	for f in $sysfs/*
+	do
+		_shutdown `basename $f`
+		RETVAL=$?
+		[ $RETVAL -ne 0 ] && return $RETVAL
+	done
+	return 0
+}
+
+_wait()
+{
+	f=$sysfs/$1
+	while [ "`cat $f/state`" != "offline" -a "`cat $f/state`" != "online" ]
+	do
+		sleep 1
+		echo -e "Waiting for $1 to go offline"
+	done
+}
+
+wait()
+{
+	if [ "`echo $1 | head -c3`" == "mic" ]; then
+		_wait $1
+		return $?
+	fi
+	# Wait for the cards to go offline
+	for f in $sysfs/*
+	do
+		_wait `basename $f`
+		RETVAL=$?
+		[ $RETVAL -ne 0 ] && return $RETVAL
+	done
+	return 0
+}
+
+if [ ! -d "$sysfs" ]; then
+	echo -e $"Module unloaded "
+	exit 3
+fi
+
+case $1 in
+	-s)
+		status $2
+		;;
+	-r)
+		reset $2
+		;;
+	-b)
+		boot $2
+		;;
+	-S)
+		shutdown $2
+		;;
+	-w)
+		wait $2
+		;;
+	*)
+		echo $"Usage: $0 {-s (status) |-r (reset) |-b (boot) |-S (shutdown) |-w (wait)}"
+		exit 2
+esac
+
+exit $?
--- /dev/null
+++ b/samples/mic/mpssd/mpss
@@ -0,0 +1,202 @@
+#!/bin/bash
+# Intel MIC Platform Software Stack (MPSS)
+#
+# Copyright(c) 2013 Intel Corporation.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2, as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# The full GNU General Public License is included in this distribution in
+# the file called "COPYING".
+#
+# Intel MIC User Space Tools.
+#
+# mpss	Start mpssd.
+#
+# chkconfig: 2345 95 05
+# description: start MPSS stack processing.
+#
+### BEGIN INIT INFO
+# Provides: mpss
+# Required-Start:
+# Required-Stop:
+# Short-Description: MPSS stack control
+# Description: MPSS stack control
+### END INIT INFO
+
+# Source function library.
+. /etc/init.d/functions
+
+exec=/usr/sbin/mpssd
+sysfs="/sys/class/mic"
+
+start()
+{
+	[ -x $exec ] || exit 5
+
+	if [ "`ps -e | awk '{print $4}' | grep mpssd | head -1`" = "mpssd" ]; then
+		echo -e $"MPSSD already running! "
+		success
+		echo
+		return 0
+	fi
+
+	echo -e $"Starting MPSS Stack"
+	echo -e $"Loading MIC_X100_DMA & MIC_HOST Modules"
+
+	for f in "mic_host" "mic_x100_dma"
+	do
+		modprobe $f
+		RETVAL=$?
+		if [ $RETVAL -ne 0 ]; then
+			failure
+			echo
+			return $RETVAL
+		fi
+	done
+
+	# Start the daemon
+	echo -n $"Starting MPSSD "
+	$exec
+	RETVAL=$?
+	if [ $RETVAL -ne 0 ]; then
+		failure
+		echo
+		return $RETVAL
+	fi
+	success
+	echo
+
+	sleep 5
+
+	# Boot the cards
+	micctrl -b
+
+	# Wait till ping works
+	for f in $sysfs/*
+	do
+		count=100
+		ipaddr=`cat $f/cmdline`
+		ipaddr=${ipaddr#*address,}
+		ipaddr=`echo $ipaddr | cut -d, -f1 | cut -d\; -f1`
+		while [ $count -ge 0 ]
+		do
+			echo -e "Pinging "`basename $f`" "
+			ping -c 1 $ipaddr &> /dev/null
+			RETVAL=$?
+			if [ $RETVAL -eq 0 ]; then
+				success
+				break
+			fi
+			sleep 1
+			count=`expr $count - 1`
+		done
+		[ $RETVAL -ne 0 ] && failure || success
+		echo
+	done
+	return $RETVAL
+}
+
+stop()
+{
+	echo -e $"Shutting down MPSS Stack: "
+
+	# Bail out if module is unloaded
+	if [ ! -d "$sysfs" ]; then
+		echo -n $"Module unloaded "
+		success
+		echo
+		return 0
+	fi
+
+	# Shut down the cards.
+	micctrl -S
+
+	# Wait for the cards to go offline
+	for f in $sysfs/*
+	do
+		while [ "`cat $f/state`" != "offline" ]
+		do
+			sleep 1
+			echo -e "Waiting for "`basename $f`" to go offline"
+		done
+	done
+
+	# Display the status of the cards
+	micctrl -s
+
+	# Kill MPSSD now
+	echo -n $"Killing MPSSD"
+	killall -9 mpssd 2>/dev/null
+	RETVAL=$?
+	[ $RETVAL -ne 0 ] && failure || success
+	echo
+	return $RETVAL
+}
+
+restart()
+{
+	stop
+	sleep 5
+	start
+}
+
+status()
+{
+	micctrl -s
+	if [ "`ps -e | awk '{print $4}' | grep mpssd | head -n 1`" = "mpssd" ]; then
+		echo "mpssd is running"
+	else
+		echo "mpssd is stopped"
+	fi
+	return 0
+}
+
+unload()
+{
+	if [ ! -d "$sysfs" ]; then
+		echo -n $"No MIC_HOST Module: "
+		success
+		echo
+		return
+	fi
+
+	stop
+
+	sleep 5
+	echo -n $"Removing MIC_HOST & MIC_X100_DMA Modules: "
+	modprobe -r mic_host mic_x100_dma
+	RETVAL=$?
+	[ $RETVAL -ne 0 ] && failure || success
+	echo
+	return $RETVAL
+}
+
+case $1 in
+	start)
+		start
+		;;
+	stop)
+		stop
+		;;
+	restart)
+		restart
+		;;
+	status)
+		status
+		;;
+	unload)
+		unload
+		;;
+	*)
+		echo $"Usage: $0 {start|stop|restart|status|unload}"
+		exit 2
+esac
+
+exit $?
--- /dev/null
+++ b/samples/mic/mpssd/mpssd.c
@@ -0,0 +1,1728 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC User Space Tools.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <signal.h>
+#include <poll.h>
+#include <features.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <linux/virtio_ring.h>
+#include <linux/virtio_net.h>
+#include <linux/virtio_console.h>
+#include <linux/virtio_blk.h>
+#include <linux/version.h>
+#include "mpssd.h"
+#include <linux/mic_ioctl.h>
+#include <linux/mic_common.h>
+#include <tools/endian.h>
+
+static void init_mic(struct mic_info *mic);
+
+static FILE *logfp;
+static struct mic_info mic_list;
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+#define min_t(type, x, y) ({				\
+		type __min1 = (x);                      \
+		type __min2 = (y);                      \
+		__min1 < __min2 ? __min1 : __min2; })
+
+/* align addr on a size boundary - adjust address up/down if needed */
+#define _ALIGN_DOWN(addr, size)  ((addr)&(~((size)-1)))
+#define _ALIGN_UP(addr, size)    _ALIGN_DOWN(addr + size - 1, size)
+
+/* align addr on a size boundary - adjust address up if needed */
+#define _ALIGN(addr, size)     _ALIGN_UP(addr, size)
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        _ALIGN(addr, PAGE_SIZE)
+
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+
+#define GSO_ENABLED		1
+#define MAX_GSO_SIZE		(64 * 1024)
+#define ETH_H_LEN		14
+#define MAX_NET_PKT_SIZE	(_ALIGN_UP(MAX_GSO_SIZE + ETH_H_LEN, 64))
+#define MIC_DEVICE_PAGE_END	0x1000
+
+#ifndef VIRTIO_NET_HDR_F_DATA_VALID
+#define VIRTIO_NET_HDR_F_DATA_VALID	2	/* Csum is valid */
+#endif
+
+static struct {
+	struct mic_device_desc dd;
+	struct mic_vqconfig vqconfig[2];
+	__u32 host_features, guest_acknowledgements;
+	struct virtio_console_config cons_config;
+} virtcons_dev_page = {
+	.dd = {
+		.type = VIRTIO_ID_CONSOLE,
+		.num_vq = ARRAY_SIZE(virtcons_dev_page.vqconfig),
+		.feature_len = sizeof(virtcons_dev_page.host_features),
+		.config_len = sizeof(virtcons_dev_page.cons_config),
+	},
+	.vqconfig[0] = {
+		.num = htole16(MIC_VRING_ENTRIES),
+	},
+	.vqconfig[1] = {
+		.num = htole16(MIC_VRING_ENTRIES),
+	},
+};
+
+static struct {
+	struct mic_device_desc dd;
+	struct mic_vqconfig vqconfig[2];
+	__u32 host_features, guest_acknowledgements;
+	struct virtio_net_config net_config;
+} virtnet_dev_page = {
+	.dd = {
+		.type = VIRTIO_ID_NET,
+		.num_vq = ARRAY_SIZE(virtnet_dev_page.vqconfig),
+		.feature_len = sizeof(virtnet_dev_page.host_features),
+		.config_len = sizeof(virtnet_dev_page.net_config),
+	},
+	.vqconfig[0] = {
+		.num = htole16(MIC_VRING_ENTRIES),
+	},
+	.vqconfig[1] = {
+		.num = htole16(MIC_VRING_ENTRIES),
+	},
+#if GSO_ENABLED
+		.host_features = htole32(
+		1 << VIRTIO_NET_F_CSUM |
+		1 << VIRTIO_NET_F_GSO |
+		1 << VIRTIO_NET_F_GUEST_TSO4 |
+		1 << VIRTIO_NET_F_GUEST_TSO6 |
+		1 << VIRTIO_NET_F_GUEST_ECN |
+		1 << VIRTIO_NET_F_GUEST_UFO),
+#else
+		.host_features = 0,
+#endif
+};
+
+static const char *mic_config_dir = "/etc/sysconfig/mic";
+static const char *virtblk_backend = "VIRTBLK_BACKEND";
+static struct {
+	struct mic_device_desc dd;
+	struct mic_vqconfig vqconfig[1];
+	__u32 host_features, guest_acknowledgements;
+	struct virtio_blk_config blk_config;
+} virtblk_dev_page = {
+	.dd = {
+		.type = VIRTIO_ID_BLOCK,
+		.num_vq = ARRAY_SIZE(virtblk_dev_page.vqconfig),
+		.feature_len = sizeof(virtblk_dev_page.host_features),
+		.config_len = sizeof(virtblk_dev_page.blk_config),
+	},
+	.vqconfig[0] = {
+		.num = htole16(MIC_VRING_ENTRIES),
+	},
+	.host_features =
+		htole32(1<<VIRTIO_BLK_F_SEG_MAX),
+	.blk_config = {
+		.seg_max = htole32(MIC_VRING_ENTRIES - 2),
+		.capacity = htole64(0),
+	 }
+};
+
+static char *myname;
+
+static int
+tap_configure(struct mic_info *mic, char *dev)
+{
+	pid_t pid;
+	char *ifargv[7];
+	char ipaddr[IFNAMSIZ];
+	int ret = 0;
+
+	pid = fork();
+	if (pid == 0) {
+		ifargv[0] = "ip";
+		ifargv[1] = "link";
+		ifargv[2] = "set";
+		ifargv[3] = dev;
+		ifargv[4] = "up";
+		ifargv[5] = NULL;
+		mpsslog("Configuring %s\n", dev);
+		ret = execvp("ip", ifargv);
+		if (ret < 0) {
+			mpsslog("%s execvp failed errno %s\n",
+				mic->name, strerror(errno));
+			return ret;
+		}
+	}
+	if (pid < 0) {
+		mpsslog("%s fork failed errno %s\n",
+			mic->name, strerror(errno));
+		return ret;
+	}
+
+	ret = waitpid(pid, NULL, 0);
+	if (ret < 0) {
+		mpsslog("%s waitpid failed errno %s\n",
+			mic->name, strerror(errno));
+		return ret;
+	}
+
+	snprintf(ipaddr, IFNAMSIZ, "172.31.%d.254/24", mic->id);
+
+	pid = fork();
+	if (pid == 0) {
+		ifargv[0] = "ip";
+		ifargv[1] = "addr";
+		ifargv[2] = "add";
+		ifargv[3] = ipaddr;
+		ifargv[4] = "dev";
+		ifargv[5] = dev;
+		ifargv[6] = NULL;
+		mpsslog("Configuring %s ipaddr %s\n", dev, ipaddr);
+		ret = execvp("ip", ifargv);
+		if (ret < 0) {
+			mpsslog("%s execvp failed errno %s\n",
+				mic->name, strerror(errno));
+			return ret;
+		}
+	}
+	if (pid < 0) {
+		mpsslog("%s fork failed errno %s\n",
+			mic->name, strerror(errno));
+		return ret;
+	}
+
+	ret = waitpid(pid, NULL, 0);
+	if (ret < 0) {
+		mpsslog("%s waitpid failed errno %s\n",
+			mic->name, strerror(errno));
+		return ret;
+	}
+	mpsslog("MIC name %s %s %d DONE!\n",
+		mic->name, __func__, __LINE__);
+	return 0;
+}
+
+static int tun_alloc(struct mic_info *mic, char *dev)
+{
+	struct ifreq ifr;
+	int fd, err;
+#if GSO_ENABLED
+	unsigned offload;
+#endif
+	fd = open("/dev/net/tun", O_RDWR);
+	if (fd < 0) {
+		mpsslog("Could not open /dev/net/tun %s\n", strerror(errno));
+		goto done;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
+	if (*dev)
+		strncpy(ifr.ifr_name, dev, IFNAMSIZ);
+
+	err = ioctl(fd, TUNSETIFF, (void *)&ifr);
+	if (err < 0) {
+		mpsslog("%s %s %d TUNSETIFF failed %s\n",
+			mic->name, __func__, __LINE__, strerror(errno));
+		close(fd);
+		return err;
+	}
+#if GSO_ENABLED
+	offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 |
+		TUN_F_TSO_ECN | TUN_F_UFO;
+
+	err = ioctl(fd, TUNSETOFFLOAD, offload);
+	if (err < 0) {
+		mpsslog("%s %s %d TUNSETOFFLOAD failed %s\n",
+			mic->name, __func__, __LINE__, strerror(errno));
+		close(fd);
+		return err;
+	}
+#endif
+	strcpy(dev, ifr.ifr_name);
+	mpsslog("Created TAP %s\n", dev);
+done:
+	return fd;
+}
+
+#define NET_FD_VIRTIO_NET 0
+#define NET_FD_TUN 1
+#define MAX_NET_FD 2
+
+static void set_dp(struct mic_info *mic, int type, void *dp)
+{
+	switch (type) {
+	case VIRTIO_ID_CONSOLE:
+		mic->mic_console.console_dp = dp;
+		return;
+	case VIRTIO_ID_NET:
+		mic->mic_net.net_dp = dp;
+		return;
+	case VIRTIO_ID_BLOCK:
+		mic->mic_virtblk.block_dp = dp;
+		return;
+	}
+	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
+	assert(0);
+}
+
+static void *get_dp(struct mic_info *mic, int type)
+{
+	switch (type) {
+	case VIRTIO_ID_CONSOLE:
+		return mic->mic_console.console_dp;
+	case VIRTIO_ID_NET:
+		return mic->mic_net.net_dp;
+	case VIRTIO_ID_BLOCK:
+		return mic->mic_virtblk.block_dp;
+	}
+	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
+	assert(0);
+	return NULL;
+}
+
+static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type)
+{
+	struct mic_device_desc *d;
+	int i;
+	void *dp = get_dp(mic, type);
+
+	for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE;
+		i += mic_total_desc_size(d)) {
+		d = dp + i;
+
+		/* End of list */
+		if (d->type == 0)
+			break;
+
+		if (d->type == -1)
+			continue;
+
+		mpsslog("%s %s d-> type %d d %p\n",
+			mic->name, __func__, d->type, d);
+
+		if (d->type == (__u8)type)
+			return d;
+	}
+	mpsslog("%s %s %d not found\n", mic->name, __func__, type);
+	assert(0);
+	return NULL;
+}
+
+/* See comments in vhost.c for explanation of next_desc() */
+static unsigned next_desc(struct vring_desc *desc)
+{
+	unsigned int next;
+
+	if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT))
+		return -1U;
+	next = le16toh(desc->next);
+	return next;
+}
+
+/* Sum up all the IOVEC length */
+static ssize_t
+sum_iovec_len(struct mic_copy_desc *copy)
+{
+	ssize_t sum = 0;
+	int i;
+
+	for (i = 0; i < copy->iovcnt; i++)
+		sum += copy->iov[i].iov_len;
+	return sum;
+}
+
+static inline void verify_out_len(struct mic_info *mic,
+	struct mic_copy_desc *copy)
+{
+	if (copy->out_len != sum_iovec_len(copy)) {
+		mpsslog("%s %s %d BUG copy->out_len 0x%x len 0x%zx\n",
+			mic->name, __func__, __LINE__,
+			copy->out_len, sum_iovec_len(copy));
+		assert(copy->out_len == sum_iovec_len(copy));
+	}
+}
+
+/* Display an iovec */
+static void
+disp_iovec(struct mic_info *mic, struct mic_copy_desc *copy,
+	   const char *s, int line)
+{
+	int i;
+
+	for (i = 0; i < copy->iovcnt; i++)
+		mpsslog("%s %s %d copy->iov[%d] addr %p len 0x%zx\n",
+			mic->name, s, line, i,
+			copy->iov[i].iov_base, copy->iov[i].iov_len);
+}
+
+static inline __u16 read_avail_idx(struct mic_vring *vr)
+{
+	return ACCESS_ONCE(vr->info->avail_idx);
+}
+
+static inline void txrx_prepare(int type, bool tx, struct mic_vring *vr,
+				struct mic_copy_desc *copy, ssize_t len)
+{
+	copy->vr_idx = tx ? 0 : 1;
+	copy->update_used = true;
+	if (type == VIRTIO_ID_NET)
+		copy->iov[1].iov_len = len - sizeof(struct virtio_net_hdr);
+	else
+		copy->iov[0].iov_len = len;
+}
+
+/* Central API which triggers the copies */
+static int
+mic_virtio_copy(struct mic_info *mic, int fd,
+		struct mic_vring *vr, struct mic_copy_desc *copy)
+{
+	int ret;
+
+	ret = ioctl(fd, MIC_VIRTIO_COPY_DESC, copy);
+	if (ret) {
+		mpsslog("%s %s %d errno %s ret %d\n",
+			mic->name, __func__, __LINE__,
+			strerror(errno), ret);
+	}
+	return ret;
+}
+
+/*
+ * This initialization routine requires at least one
+ * vring i.e. vr0. vr1 is optional.
+ */
+static void *
+init_vr(struct mic_info *mic, int fd, int type,
+	struct mic_vring *vr0, struct mic_vring *vr1, int num_vq)
+{
+	int vr_size;
+	char *va;
+
+	vr_size = PAGE_ALIGN(vring_size(MIC_VRING_ENTRIES,
+		MIC_VIRTIO_RING_ALIGN) + sizeof(struct _mic_vring_info));
+	va = mmap(NULL, MIC_DEVICE_PAGE_END + vr_size * num_vq,
+		PROT_READ, MAP_SHARED, fd, 0);
+	if (MAP_FAILED == va) {
+		mpsslog("%s %s %d mmap failed errno %s\n",
+			mic->name, __func__, __LINE__,
+			strerror(errno));
+		goto done;
+	}
+	set_dp(mic, type, va);
+	vr0->va = (struct mic_vring *)&va[MIC_DEVICE_PAGE_END];
+	vr0->info = vr0->va +
+		vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN);
+	vring_init(&vr0->vr,
+		   MIC_VRING_ENTRIES, vr0->va, MIC_VIRTIO_RING_ALIGN);
+	mpsslog("%s %s vr0 %p vr0->info %p vr_size 0x%x vring 0x%x ",
+		__func__, mic->name, vr0->va, vr0->info, vr_size,
+		vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
+	mpsslog("magic 0x%x expected 0x%x\n",
+		le32toh(vr0->info->magic), MIC_MAGIC + type);
+	assert(le32toh(vr0->info->magic) == MIC_MAGIC + type);
+	if (vr1) {
+		vr1->va = (struct mic_vring *)
+			&va[MIC_DEVICE_PAGE_END + vr_size];
+		vr1->info = vr1->va + vring_size(MIC_VRING_ENTRIES,
+			MIC_VIRTIO_RING_ALIGN);
+		vring_init(&vr1->vr,
+			   MIC_VRING_ENTRIES, vr1->va, MIC_VIRTIO_RING_ALIGN);
+		mpsslog("%s %s vr1 %p vr1->info %p vr_size 0x%x vring 0x%x ",
+			__func__, mic->name, vr1->va, vr1->info, vr_size,
+			vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
+		mpsslog("magic 0x%x expected 0x%x\n",
+			le32toh(vr1->info->magic), MIC_MAGIC + type + 1);
+		assert(le32toh(vr1->info->magic) == MIC_MAGIC + type + 1);
+	}
+done:
+	return va;
+}
+
+static void
+wait_for_card_driver(struct mic_info *mic, int fd, int type)
+{
+	struct pollfd pollfd;
+	int err;
+	struct mic_device_desc *desc = get_device_desc(mic, type);
+
+	pollfd.fd = fd;
+	mpsslog("%s %s Waiting .... desc-> type %d status 0x%x\n",
+		mic->name, __func__, type, desc->status);
+	while (1) {
+		pollfd.events = POLLIN;
+		pollfd.revents = 0;
+		err = poll(&pollfd, 1, -1);
+		if (err < 0) {
+			mpsslog("%s %s poll failed %s\n",
+				mic->name, __func__, strerror(errno));
+			continue;
+		}
+
+		if (pollfd.revents) {
+			mpsslog("%s %s Waiting... desc-> type %d status 0x%x\n",
+				mic->name, __func__, type, desc->status);
+			if (desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
+				mpsslog("%s %s poll.revents %d\n",
+					mic->name, __func__, pollfd.revents);
+				mpsslog("%s %s desc-> type %d status 0x%x\n",
+					mic->name, __func__, type,
+					desc->status);
+				break;
+			}
+		}
+	}
+}
+
+/* Spin till we have some descriptors */
+static void
+spin_for_descriptors(struct mic_info *mic, struct mic_vring *vr)
+{
+	__u16 avail_idx = read_avail_idx(vr);
+
+	while (avail_idx == le16toh(ACCESS_ONCE(vr->vr.avail->idx))) {
+#ifdef DEBUG
+		mpsslog("%s %s waiting for desc avail %d info_avail %d\n",
+			mic->name, __func__,
+			le16toh(vr->vr.avail->idx), vr->info->avail_idx);
+#endif
+		sched_yield();
+	}
+}
+
+static void *
+virtio_net(void *arg)
+{
+	static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)];
+	static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64)));
+	struct iovec vnet_iov[2][2] = {
+		{ { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) },
+		  { .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } },
+		{ { .iov_base = vnet_hdr[1], .iov_len = sizeof(vnet_hdr[1]) },
+		  { .iov_base = vnet_buf[1], .iov_len = sizeof(vnet_buf[1]) } },
+	};
+	struct iovec *iov0 = vnet_iov[0], *iov1 = vnet_iov[1];
+	struct mic_info *mic = (struct mic_info *)arg;
+	char if_name[IFNAMSIZ];
+	struct pollfd net_poll[MAX_NET_FD];
+	struct mic_vring tx_vr, rx_vr;
+	struct mic_copy_desc copy;
+	struct mic_device_desc *desc;
+	int err;
+
+	snprintf(if_name, IFNAMSIZ, "mic%d", mic->id);
+	mic->mic_net.tap_fd = tun_alloc(mic, if_name);
+	if (mic->mic_net.tap_fd < 0)
+		goto done;
+
+	if (tap_configure(mic, if_name))
+		goto done;
+	mpsslog("MIC name %s id %d\n", mic->name, mic->id);
+
+	net_poll[NET_FD_VIRTIO_NET].fd = mic->mic_net.virtio_net_fd;
+	net_poll[NET_FD_VIRTIO_NET].events = POLLIN;
+	net_poll[NET_FD_TUN].fd = mic->mic_net.tap_fd;
+	net_poll[NET_FD_TUN].events = POLLIN;
+
+	if (MAP_FAILED == init_vr(mic, mic->mic_net.virtio_net_fd,
+				  VIRTIO_ID_NET, &tx_vr, &rx_vr,
+		virtnet_dev_page.dd.num_vq)) {
+		mpsslog("%s init_vr failed %s\n",
+			mic->name, strerror(errno));
+		goto done;
+	}
+
+	copy.iovcnt = 2;
+	desc = get_device_desc(mic, VIRTIO_ID_NET);
+
+	while (1) {
+		ssize_t len;
+
+		net_poll[NET_FD_VIRTIO_NET].revents = 0;
+		net_poll[NET_FD_TUN].revents = 0;
+
+		/* Start polling for data from tap and virtio net */
+		err = poll(net_poll, 2, -1);
+		if (err < 0) {
+			mpsslog("%s poll failed %s\n",
+				__func__, strerror(errno));
+			continue;
+		}
+		if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK))
+			wait_for_card_driver(mic, mic->mic_net.virtio_net_fd,
+					     VIRTIO_ID_NET);
+		/*
+		 * Check if there is data to be read from TUN and write to
+		 * virtio net fd if there is.
+		 */
+		if (net_poll[NET_FD_TUN].revents & POLLIN) {
+			copy.iov = iov0;
+			len = readv(net_poll[NET_FD_TUN].fd,
+				copy.iov, copy.iovcnt);
+			if (len > 0) {
+				struct virtio_net_hdr *hdr
+					= (struct virtio_net_hdr *)vnet_hdr[0];
+
+				/* Disable checksums on the card since we are on
+				   a reliable PCIe link */
+				hdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
+#ifdef DEBUG
+				mpsslog("%s %s %d hdr->flags 0x%x ", mic->name,
+					__func__, __LINE__, hdr->flags);
+				mpsslog("copy.out_len %d hdr->gso_type 0x%x\n",
+					copy.out_len, hdr->gso_type);
+#endif
+#ifdef DEBUG
+				disp_iovec(mic, copy, __func__, __LINE__);
+				mpsslog("%s %s %d read from tap 0x%lx\n",
+					mic->name, __func__, __LINE__,
+					len);
+#endif
+				spin_for_descriptors(mic, &tx_vr);
+				txrx_prepare(VIRTIO_ID_NET, 1, &tx_vr, &copy,
+					     len);
+
+				err = mic_virtio_copy(mic,
+					mic->mic_net.virtio_net_fd, &tx_vr,
+					&copy);
+				if (err < 0) {
+					mpsslog("%s %s %d mic_virtio_copy %s\n",
+						mic->name, __func__, __LINE__,
+						strerror(errno));
+				}
+				if (!err)
+					verify_out_len(mic, &copy);
+#ifdef DEBUG
+				disp_iovec(mic, copy, __func__, __LINE__);
+				mpsslog("%s %s %d wrote to net 0x%lx\n",
+					mic->name, __func__, __LINE__,
+					sum_iovec_len(&copy));
+#endif
+				/* Reinitialize IOV for next run */
+				iov0[1].iov_len = MAX_NET_PKT_SIZE;
+			} else if (len < 0) {
+				disp_iovec(mic, &copy, __func__, __LINE__);
+				mpsslog("%s %s %d read failed %s ", mic->name,
+					__func__, __LINE__, strerror(errno));
+				mpsslog("cnt %d sum %zd\n",
+					copy.iovcnt, sum_iovec_len(&copy));
+			}
+		}
+
+		/*
+		 * Check if there is data to be read from virtio net and
+		 * write to TUN if there is.
+		 */
+		if (net_poll[NET_FD_VIRTIO_NET].revents & POLLIN) {
+			while (rx_vr.info->avail_idx !=
+				le16toh(rx_vr.vr.avail->idx)) {
+				copy.iov = iov1;
+				txrx_prepare(VIRTIO_ID_NET, 0, &rx_vr, &copy,
+					     MAX_NET_PKT_SIZE
+					+ sizeof(struct virtio_net_hdr));
+
+				err = mic_virtio_copy(mic,
+					mic->mic_net.virtio_net_fd, &rx_vr,
+					&copy);
+				if (!err) {
+#ifdef DEBUG
+					struct virtio_net_hdr *hdr
+						= (struct virtio_net_hdr *)
+							vnet_hdr[1];
+
+					mpsslog("%s %s %d hdr->flags 0x%x, ",
+						mic->name, __func__, __LINE__,
+						hdr->flags);
+					mpsslog("out_len %d gso_type 0x%x\n",
+						copy.out_len,
+						hdr->gso_type);
+#endif
+					/* Set the correct output iov_len */
+					iov1[1].iov_len = copy.out_len -
+						sizeof(struct virtio_net_hdr);
+					verify_out_len(mic, &copy);
+#ifdef DEBUG
+					disp_iovec(mic, copy, __func__,
+						   __LINE__);
+					mpsslog("%s %s %d ",
+						mic->name, __func__, __LINE__);
+					mpsslog("read from net 0x%lx\n",
+						sum_iovec_len(copy));
+#endif
+					len = writev(net_poll[NET_FD_TUN].fd,
+						copy.iov, copy.iovcnt);
+					if (len != sum_iovec_len(&copy)) {
+						mpsslog("Tun write failed %s ",
+							strerror(errno));
+						mpsslog("len 0x%zx ", len);
+						mpsslog("read_len 0x%zx\n",
+							sum_iovec_len(&copy));
+					} else {
+#ifdef DEBUG
+						disp_iovec(mic, &copy, __func__,
+							   __LINE__);
+						mpsslog("%s %s %d ",
+							mic->name, __func__,
+							__LINE__);
+						mpsslog("wrote to tap 0x%lx\n",
+							len);
+#endif
+					}
+				} else {
+					mpsslog("%s %s %d mic_virtio_copy %s\n",
+						mic->name, __func__, __LINE__,
+						strerror(errno));
+					break;
+				}
+			}
+		}
+		if (net_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
+			mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
+	}
+done:
+	pthread_exit(NULL);
+}
+
+/* virtio_console */
+#define VIRTIO_CONSOLE_FD 0
+#define MONITOR_FD (VIRTIO_CONSOLE_FD + 1)
+#define MAX_CONSOLE_FD (MONITOR_FD + 1)  /* must be the last one + 1 */
+#define MAX_BUFFER_SIZE PAGE_SIZE
+
+static void *
+virtio_console(void *arg)
+{
+	static __u8 vcons_buf[2][PAGE_SIZE];
+	struct iovec vcons_iov[2] = {
+		{ .iov_base = vcons_buf[0], .iov_len = sizeof(vcons_buf[0]) },
+		{ .iov_base = vcons_buf[1], .iov_len = sizeof(vcons_buf[1]) },
+	};
+	struct iovec *iov0 = &vcons_iov[0], *iov1 = &vcons_iov[1];
+	struct mic_info *mic = (struct mic_info *)arg;
+	int err;
+	struct pollfd console_poll[MAX_CONSOLE_FD];
+	int pty_fd;
+	char *pts_name;
+	ssize_t len;
+	struct mic_vring tx_vr, rx_vr;
+	struct mic_copy_desc copy;
+	struct mic_device_desc *desc;
+
+	pty_fd = posix_openpt(O_RDWR);
+	if (pty_fd < 0) {
+		mpsslog("can't open a pseudoterminal master device: %s\n",
+			strerror(errno));
+		goto _return;
+	}
+	pts_name = ptsname(pty_fd);
+	if (pts_name == NULL) {
+		mpsslog("can't get pts name\n");
+		goto _close_pty;
+	}
+	printf("%s console message goes to %s\n", mic->name, pts_name);
+	mpsslog("%s console message goes to %s\n", mic->name, pts_name);
+	err = grantpt(pty_fd);
+	if (err < 0) {
+		mpsslog("can't grant access: %s %s\n",
+			pts_name, strerror(errno));
+		goto _close_pty;
+	}
+	err = unlockpt(pty_fd);
+	if (err < 0) {
+		mpsslog("can't unlock a pseudoterminal: %s %s\n",
+			pts_name, strerror(errno));
+		goto _close_pty;
+	}
+	console_poll[MONITOR_FD].fd = pty_fd;
+	console_poll[MONITOR_FD].events = POLLIN;
+
+	console_poll[VIRTIO_CONSOLE_FD].fd = mic->mic_console.virtio_console_fd;
+	console_poll[VIRTIO_CONSOLE_FD].events = POLLIN;
+
+	if (MAP_FAILED == init_vr(mic, mic->mic_console.virtio_console_fd,
+				  VIRTIO_ID_CONSOLE, &tx_vr, &rx_vr,
+		virtcons_dev_page.dd.num_vq)) {
+		mpsslog("%s init_vr failed %s\n",
+			mic->name, strerror(errno));
+		goto _close_pty;
+	}
+
+	copy.iovcnt = 1;
+	desc = get_device_desc(mic, VIRTIO_ID_CONSOLE);
+
+	for (;;) {
+		console_poll[MONITOR_FD].revents = 0;
+		console_poll[VIRTIO_CONSOLE_FD].revents = 0;
+		err = poll(console_poll, MAX_CONSOLE_FD, -1);
+		if (err < 0) {
+			mpsslog("%s %d: poll failed: %s\n", __func__, __LINE__,
+				strerror(errno));
+			continue;
+		}
+		if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK))
+			wait_for_card_driver(mic,
+					     mic->mic_console.virtio_console_fd,
+				VIRTIO_ID_CONSOLE);
+
+		if (console_poll[MONITOR_FD].revents & POLLIN) {
+			copy.iov = iov0;
+			len = readv(pty_fd, copy.iov, copy.iovcnt);
+			if (len > 0) {
+#ifdef DEBUG
+				disp_iovec(mic, copy, __func__, __LINE__);
+				mpsslog("%s %s %d read from tap 0x%lx\n",
+					mic->name, __func__, __LINE__,
+					len);
+#endif
+				spin_for_descriptors(mic, &tx_vr);
+				txrx_prepare(VIRTIO_ID_CONSOLE, 1, &tx_vr,
+					     &copy, len);
+
+				err = mic_virtio_copy(mic,
+					mic->mic_console.virtio_console_fd,
+					&tx_vr, &copy);
+				if (err < 0) {
+					mpsslog("%s %s %d mic_virtio_copy %s\n",
+						mic->name, __func__, __LINE__,
+						strerror(errno));
+				}
+				if (!err)
+					verify_out_len(mic, &copy);
+#ifdef DEBUG
+				disp_iovec(mic, copy, __func__, __LINE__);
+				mpsslog("%s %s %d wrote to net 0x%lx\n",
+					mic->name, __func__, __LINE__,
+					sum_iovec_len(copy));
+#endif
+				/* Reinitialize IOV for next run */
+				iov0->iov_len = PAGE_SIZE;
+			} else if (len < 0) {
+				disp_iovec(mic, &copy, __func__, __LINE__);
+				mpsslog("%s %s %d read failed %s ",
+					mic->name, __func__, __LINE__,
+					strerror(errno));
+				mpsslog("cnt %d sum %zd\n",
+					copy.iovcnt, sum_iovec_len(&copy));
+			}
+		}
+
+		if (console_poll[VIRTIO_CONSOLE_FD].revents & POLLIN) {
+			while (rx_vr.info->avail_idx !=
+				le16toh(rx_vr.vr.avail->idx)) {
+				copy.iov = iov1;
+				txrx_prepare(VIRTIO_ID_CONSOLE, 0, &rx_vr,
+					     &copy, PAGE_SIZE);
+
+				err = mic_virtio_copy(mic,
+					mic->mic_console.virtio_console_fd,
+					&rx_vr, &copy);
+				if (!err) {
+					/* Set the correct output iov_len */
+					iov1->iov_len = copy.out_len;
+					verify_out_len(mic, &copy);
+#ifdef DEBUG
+					disp_iovec(mic, copy, __func__,
+						   __LINE__);
+					mpsslog("%s %s %d ",
+						mic->name, __func__, __LINE__);
+					mpsslog("read from net 0x%lx\n",
+						sum_iovec_len(copy));
+#endif
+					len = writev(pty_fd,
+						copy.iov, copy.iovcnt);
+					if (len != sum_iovec_len(&copy)) {
+						mpsslog("Tun write failed %s ",
+							strerror(errno));
+						mpsslog("len 0x%zx ", len);
+						mpsslog("read_len 0x%zx\n",
+							sum_iovec_len(&copy));
+					} else {
+#ifdef DEBUG
+						disp_iovec(mic, copy, __func__,
+							   __LINE__);
+						mpsslog("%s %s %d ",
+							mic->name, __func__,
+							__LINE__);
+						mpsslog("wrote to tap 0x%lx\n",
+							len);
+#endif
+					}
+				} else {
+					mpsslog("%s %s %d mic_virtio_copy %s\n",
+						mic->name, __func__, __LINE__,
+						strerror(errno));
+					break;
+				}
+			}
+		}
+		if (console_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
+			mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
+	}
+_close_pty:
+	close(pty_fd);
+_return:
+	pthread_exit(NULL);
+}
+
+static void
+add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd)
+{
+	char path[PATH_MAX];
+	int fd, err;
+
+	snprintf(path, PATH_MAX, "/dev/mic%d", mic->id);
+	fd = open(path, O_RDWR);
+	if (fd < 0) {
+		mpsslog("Could not open %s %s\n", path, strerror(errno));
+		return;
+	}
+
+	err = ioctl(fd, MIC_VIRTIO_ADD_DEVICE, dd);
+	if (err < 0) {
+		mpsslog("Could not add %d %s\n", dd->type, strerror(errno));
+		close(fd);
+		return;
+	}
+	switch (dd->type) {
+	case VIRTIO_ID_NET:
+		mic->mic_net.virtio_net_fd = fd;
+		mpsslog("Added VIRTIO_ID_NET for %s\n", mic->name);
+		break;
+	case VIRTIO_ID_CONSOLE:
+		mic->mic_console.virtio_console_fd = fd;
+		mpsslog("Added VIRTIO_ID_CONSOLE for %s\n", mic->name);
+		break;
+	case VIRTIO_ID_BLOCK:
+		mic->mic_virtblk.virtio_block_fd = fd;
+		mpsslog("Added VIRTIO_ID_BLOCK for %s\n", mic->name);
+		break;
+	}
+}
+
+static bool
+set_backend_file(struct mic_info *mic)
+{
+	FILE *config;
+	char buff[PATH_MAX], *line, *evv, *p;
+
+	snprintf(buff, PATH_MAX, "%s/mpssd%03d.conf", mic_config_dir, mic->id);
+	config = fopen(buff, "r");
+	if (config == NULL)
+		return false;
+	do {  /* look for "virtblk_backend=XXXX" */
+		line = fgets(buff, PATH_MAX, config);
+		if (line == NULL)
+			break;
+		if (*line == '#')
+			continue;
+		p = strchr(line, '\n');
+		if (p)
+			*p = '\0';
+	} while (strncmp(line, virtblk_backend, strlen(virtblk_backend)) != 0);
+	fclose(config);
+	if (line == NULL)
+		return false;
+	evv = strchr(line, '=');
+	if (evv == NULL)
+		return false;
+	mic->mic_virtblk.backend_file = malloc(strlen(evv) + 1);
+	if (mic->mic_virtblk.backend_file == NULL) {
+		mpsslog("%s %d can't allocate memory\n", mic->name, mic->id);
+		return false;
+	}
+	strcpy(mic->mic_virtblk.backend_file, evv + 1);
+	return true;
+}
+
+#define SECTOR_SIZE 512
+static bool
+set_backend_size(struct mic_info *mic)
+{
+	mic->mic_virtblk.backend_size = lseek(mic->mic_virtblk.backend, 0,
+		SEEK_END);
+	if (mic->mic_virtblk.backend_size < 0) {
+		mpsslog("%s: can't seek: %s\n",
+			mic->name, mic->mic_virtblk.backend_file);
+		return false;
+	}
+	virtblk_dev_page.blk_config.capacity =
+		mic->mic_virtblk.backend_size / SECTOR_SIZE;
+	if ((mic->mic_virtblk.backend_size % SECTOR_SIZE) != 0)
+		virtblk_dev_page.blk_config.capacity++;
+
+	virtblk_dev_page.blk_config.capacity =
+		htole64(virtblk_dev_page.blk_config.capacity);
+
+	return true;
+}
+
+static bool
+open_backend(struct mic_info *mic)
+{
+	if (!set_backend_file(mic))
+		goto _error_exit;
+	mic->mic_virtblk.backend = open(mic->mic_virtblk.backend_file, O_RDWR);
+	if (mic->mic_virtblk.backend < 0) {
+		mpsslog("%s: can't open: %s\n", mic->name,
+			mic->mic_virtblk.backend_file);
+		goto _error_free;
+	}
+	if (!set_backend_size(mic))
+		goto _error_close;
+	mic->mic_virtblk.backend_addr = mmap(NULL,
+		mic->mic_virtblk.backend_size,
+		PROT_READ|PROT_WRITE, MAP_SHARED,
+		mic->mic_virtblk.backend, 0L);
+	if (mic->mic_virtblk.backend_addr == MAP_FAILED) {
+		mpsslog("%s: can't map: %s %s\n",
+			mic->name, mic->mic_virtblk.backend_file,
+			strerror(errno));
+		goto _error_close;
+	}
+	return true;
+
+ _error_close:
+	close(mic->mic_virtblk.backend);
+ _error_free:
+	free(mic->mic_virtblk.backend_file);
+ _error_exit:
+	return false;
+}
+
+static void
+close_backend(struct mic_info *mic)
+{
+	munmap(mic->mic_virtblk.backend_addr, mic->mic_virtblk.backend_size);
+	close(mic->mic_virtblk.backend);
+	free(mic->mic_virtblk.backend_file);
+}
+
+static bool
+start_virtblk(struct mic_info *mic, struct mic_vring *vring)
+{
+	if (((unsigned long)&virtblk_dev_page.blk_config % 8) != 0) {
+		mpsslog("%s: blk_config is not 8 byte aligned.\n",
+			mic->name);
+		return false;
+	}
+	add_virtio_device(mic, &virtblk_dev_page.dd);
+	if (MAP_FAILED == init_vr(mic, mic->mic_virtblk.virtio_block_fd,
+				  VIRTIO_ID_BLOCK, vring, NULL,
+				  virtblk_dev_page.dd.num_vq)) {
+		mpsslog("%s init_vr failed %s\n",
+			mic->name, strerror(errno));
+		return false;
+	}
+	return true;
+}
+
+static void
+stop_virtblk(struct mic_info *mic)
+{
+	int vr_size, ret;
+
+	vr_size = PAGE_ALIGN(vring_size(MIC_VRING_ENTRIES,
+		MIC_VIRTIO_RING_ALIGN) + sizeof(struct _mic_vring_info));
+	ret = munmap(mic->mic_virtblk.block_dp,
+		MIC_DEVICE_PAGE_END + vr_size * virtblk_dev_page.dd.num_vq);
+	if (ret < 0)
+		mpsslog("%s munmap errno %d\n", mic->name, errno);
+	close(mic->mic_virtblk.virtio_block_fd);
+}
+
+static __u8
+header_error_check(struct vring_desc *desc)
+{
+	if (le32toh(desc->len) != sizeof(struct virtio_blk_outhdr)) {
+		mpsslog("%s() %d: length is not sizeof(virtio_blk_outhd)\n",
+			__func__, __LINE__);
+		return -EIO;
+	}
+	if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT)) {
+		mpsslog("%s() %d: alone\n",
+			__func__, __LINE__);
+		return -EIO;
+	}
+	if (le16toh(desc->flags) & VRING_DESC_F_WRITE) {
+		mpsslog("%s() %d: not read\n",
+			__func__, __LINE__);
+		return -EIO;
+	}
+	return 0;
+}
+
+static int
+read_header(int fd, struct virtio_blk_outhdr *hdr, __u32 desc_idx)
+{
+	struct iovec iovec;
+	struct mic_copy_desc copy;
+
+	iovec.iov_len = sizeof(*hdr);
+	iovec.iov_base = hdr;
+	copy.iov = &iovec;
+	copy.iovcnt = 1;
+	copy.vr_idx = 0;  /* only one vring on virtio_block */
+	copy.update_used = false;  /* do not update used index */
+	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
+}
+
+static int
+transfer_blocks(int fd, struct iovec *iovec, __u32 iovcnt)
+{
+	struct mic_copy_desc copy;
+
+	copy.iov = iovec;
+	copy.iovcnt = iovcnt;
+	copy.vr_idx = 0;  /* only one vring on virtio_block */
+	copy.update_used = false;  /* do not update used index */
+	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
+}
+
+static __u8
+status_error_check(struct vring_desc *desc)
+{
+	if (le32toh(desc->len) != sizeof(__u8)) {
+		mpsslog("%s() %d: length is not sizeof(status)\n",
+			__func__, __LINE__);
+		return -EIO;
+	}
+	return 0;
+}
+
+static int
+write_status(int fd, __u8 *status)
+{
+	struct iovec iovec;
+	struct mic_copy_desc copy;
+
+	iovec.iov_base = status;
+	iovec.iov_len = sizeof(*status);
+	copy.iov = &iovec;
+	copy.iovcnt = 1;
+	copy.vr_idx = 0;  /* only one vring on virtio_block */
+	copy.update_used = true; /* Update used index */
+	return ioctl(fd, MIC_VIRTIO_COPY_DESC, &copy);
+}
+
+static void *
+virtio_block(void *arg)
+{
+	struct mic_info *mic = (struct mic_info *)arg;
+	int ret;
+	struct pollfd block_poll;
+	struct mic_vring vring;
+	__u16 avail_idx;
+	__u32 desc_idx;
+	struct vring_desc *desc;
+	struct iovec *iovec, *piov;
+	__u8 status;
+	__u32 buffer_desc_idx;
+	struct virtio_blk_outhdr hdr;
+	void *fos;
+
+	for (;;) {  /* forever */
+		if (!open_backend(mic)) { /* No virtblk */
+			for (mic->mic_virtblk.signaled = 0;
+				!mic->mic_virtblk.signaled;)
+				sleep(1);
+			continue;
+		}
+
+		/* backend file is specified. */
+		if (!start_virtblk(mic, &vring))
+			goto _close_backend;
+		iovec = malloc(sizeof(*iovec) *
+			le32toh(virtblk_dev_page.blk_config.seg_max));
+		if (!iovec) {
+			mpsslog("%s: can't alloc iovec: %s\n",
+				mic->name, strerror(ENOMEM));
+			goto _stop_virtblk;
+		}
+
+		block_poll.fd = mic->mic_virtblk.virtio_block_fd;
+		block_poll.events = POLLIN;
+		for (mic->mic_virtblk.signaled = 0;
+		     !mic->mic_virtblk.signaled;) {
+			block_poll.revents = 0;
+					/* timeout in 1 sec to see signaled */
+			ret = poll(&block_poll, 1, 1000);
+			if (ret < 0) {
+				mpsslog("%s %d: poll failed: %s\n",
+					__func__, __LINE__,
+					strerror(errno));
+				continue;
+			}
+
+			if (!(block_poll.revents & POLLIN)) {
+#ifdef DEBUG
+				mpsslog("%s %d: block_poll.revents=0x%x\n",
+					__func__, __LINE__, block_poll.revents);
+#endif
+				continue;
+			}
+
+			/* POLLIN */
+			while (vring.info->avail_idx !=
+				le16toh(vring.vr.avail->idx)) {
+				/* read header element */
+				avail_idx =
+					vring.info->avail_idx &
+					(vring.vr.num - 1);
+				desc_idx = le16toh(
+					vring.vr.avail->ring[avail_idx]);
+				desc = &vring.vr.desc[desc_idx];
+#ifdef DEBUG
+				mpsslog("%s() %d: avail_idx=%d ",
+					__func__, __LINE__,
+					vring.info->avail_idx);
+				mpsslog("vring.vr.num=%d desc=%p\n",
+					vring.vr.num, desc);
+#endif
+				status = header_error_check(desc);
+				ret = read_header(
+					mic->mic_virtblk.virtio_block_fd,
+					&hdr, desc_idx);
+				if (ret < 0) {
+					mpsslog("%s() %d %s: ret=%d %s\n",
+						__func__, __LINE__,
+						mic->name, ret,
+						strerror(errno));
+					break;
+				}
+				/* buffer element */
+				piov = iovec;
+				status = 0;
+				fos = mic->mic_virtblk.backend_addr +
+					(hdr.sector * SECTOR_SIZE);
+				buffer_desc_idx = next_desc(desc);
+				desc_idx = buffer_desc_idx;
+				for (desc = &vring.vr.desc[buffer_desc_idx];
+				     desc->flags & VRING_DESC_F_NEXT;
+				     desc_idx = next_desc(desc),
+					     desc = &vring.vr.desc[desc_idx]) {
+					piov->iov_len = desc->len;
+					piov->iov_base = fos;
+					piov++;
+					fos += desc->len;
+				}
+				/* Returning NULLs for VIRTIO_BLK_T_GET_ID. */
+				if (hdr.type & ~(VIRTIO_BLK_T_OUT |
+					VIRTIO_BLK_T_GET_ID)) {
+					/*
+					  VIRTIO_BLK_T_IN - does not do
+					  anything. Probably for documenting.
+					  VIRTIO_BLK_T_SCSI_CMD - for
+					  virtio_scsi.
+					  VIRTIO_BLK_T_FLUSH - turned off in
+					  config space.
+					  VIRTIO_BLK_T_BARRIER - defined but not
+					  used in anywhere.
+					*/
+					mpsslog("%s() %d: type %x ",
+						__func__, __LINE__,
+						hdr.type);
+					mpsslog("is not supported\n");
+					status = -ENOTSUP;
+
+				} else {
+					ret = transfer_blocks(
+					mic->mic_virtblk.virtio_block_fd,
+						iovec,
+						piov - iovec);
+					if (ret < 0 &&
+					    status != 0)
+						status = ret;
+				}
+				/* write status and update used pointer */
+				if (status != 0)
+					status = status_error_check(desc);
+				ret = write_status(
+					mic->mic_virtblk.virtio_block_fd,
+					&status);
+#ifdef DEBUG
+				mpsslog("%s() %d: write status=%d on desc=%p\n",
+					__func__, __LINE__,
+					status, desc);
+#endif
+			}
+		}
+		free(iovec);
+_stop_virtblk:
+		stop_virtblk(mic);
+_close_backend:
+		close_backend(mic);
+	}  /* forever */
+
+	pthread_exit(NULL);
+}
+
+static void
+reset(struct mic_info *mic)
+{
+#define RESET_TIMEOUT 120
+	int i = RESET_TIMEOUT;
+	setsysfs(mic->name, "state", "reset");
+	while (i) {
+		char *state;
+		state = readsysfs(mic->name, "state");
+		if (!state)
+			goto retry;
+		mpsslog("%s: %s %d state %s\n",
+			mic->name, __func__, __LINE__, state);
+
+		/*
+		 * If the shutdown was initiated by OSPM, the state stays
+		 * in "suspended" which is also a valid condition for reset.
+		 */
+		if ((!strcmp(state, "offline")) ||
+		    (!strcmp(state, "suspended"))) {
+			free(state);
+			break;
+		}
+		free(state);
+retry:
+		sleep(1);
+		i--;
+	}
+}
+
+static int
+get_mic_shutdown_status(struct mic_info *mic, char *shutdown_status)
+{
+	if (!strcmp(shutdown_status, "nop"))
+		return MIC_NOP;
+	if (!strcmp(shutdown_status, "crashed"))
+		return MIC_CRASHED;
+	if (!strcmp(shutdown_status, "halted"))
+		return MIC_HALTED;
+	if (!strcmp(shutdown_status, "poweroff"))
+		return MIC_POWER_OFF;
+	if (!strcmp(shutdown_status, "restart"))
+		return MIC_RESTART;
+	mpsslog("%s: BUG invalid status %s\n", mic->name, shutdown_status);
+	/* Invalid state */
+	assert(0);
+};
+
+static int get_mic_state(struct mic_info *mic, char *state)
+{
+	if (!strcmp(state, "offline"))
+		return MIC_OFFLINE;
+	if (!strcmp(state, "online"))
+		return MIC_ONLINE;
+	if (!strcmp(state, "shutting_down"))
+		return MIC_SHUTTING_DOWN;
+	if (!strcmp(state, "reset_failed"))
+		return MIC_RESET_FAILED;
+	if (!strcmp(state, "suspending"))
+		return MIC_SUSPENDING;
+	if (!strcmp(state, "suspended"))
+		return MIC_SUSPENDED;
+	mpsslog("%s: BUG invalid state %s\n", mic->name, state);
+	/* Invalid state */
+	assert(0);
+};
+
+static void mic_handle_shutdown(struct mic_info *mic)
+{
+#define SHUTDOWN_TIMEOUT 60
+	int i = SHUTDOWN_TIMEOUT, ret, stat = 0;
+	char *shutdown_status;
+	while (i) {
+		shutdown_status = readsysfs(mic->name, "shutdown_status");
+		if (!shutdown_status)
+			continue;
+		mpsslog("%s: %s %d shutdown_status %s\n",
+			mic->name, __func__, __LINE__, shutdown_status);
+		switch (get_mic_shutdown_status(mic, shutdown_status)) {
+		case MIC_RESTART:
+			mic->restart = 1;
+		case MIC_HALTED:
+		case MIC_POWER_OFF:
+		case MIC_CRASHED:
+			free(shutdown_status);
+			goto reset;
+		default:
+			break;
+		}
+		free(shutdown_status);
+		sleep(1);
+		i--;
+	}
+reset:
+	ret = kill(mic->pid, SIGTERM);
+	mpsslog("%s: %s %d kill pid %d ret %d\n",
+		mic->name, __func__, __LINE__,
+		mic->pid, ret);
+	if (!ret) {
+		ret = waitpid(mic->pid, &stat,
+			WIFSIGNALED(stat));
+		mpsslog("%s: %s %d waitpid ret %d pid %d\n",
+			mic->name, __func__, __LINE__,
+			ret, mic->pid);
+	}
+	if (ret == mic->pid)
+		reset(mic);
+}
+
+static void *
+mic_config(void *arg)
+{
+	struct mic_info *mic = (struct mic_info *)arg;
+	char *state = NULL;
+	char pathname[PATH_MAX];
+	int fd, ret;
+	struct pollfd ufds[1];
+	char value[4096];
+
+	snprintf(pathname, PATH_MAX - 1, "%s/%s/%s",
+		 MICSYSFSDIR, mic->name, "state");
+
+	fd = open(pathname, O_RDONLY);
+	if (fd < 0) {
+		mpsslog("%s: opening file %s failed %s\n",
+			mic->name, pathname, strerror(errno));
+		goto error;
+	}
+
+	do {
+		ret = lseek(fd, 0, SEEK_SET);
+		if (ret < 0) {
+			mpsslog("%s: Failed to seek to file start '%s': %s\n",
+				mic->name, pathname, strerror(errno));
+			goto close_error1;
+		}
+		ret = read(fd, value, sizeof(value));
+		if (ret < 0) {
+			mpsslog("%s: Failed to read sysfs entry '%s': %s\n",
+				mic->name, pathname, strerror(errno));
+			goto close_error1;
+		}
+retry:
+		state = readsysfs(mic->name, "state");
+		if (!state)
+			goto retry;
+		mpsslog("%s: %s %d state %s\n",
+			mic->name, __func__, __LINE__, state);
+		switch (get_mic_state(mic, state)) {
+		case MIC_SHUTTING_DOWN:
+			mic_handle_shutdown(mic);
+			goto close_error;
+		case MIC_SUSPENDING:
+			mic->boot_on_resume = 1;
+			setsysfs(mic->name, "state", "suspend");
+			mic_handle_shutdown(mic);
+			goto close_error;
+		case MIC_OFFLINE:
+			if (mic->boot_on_resume) {
+				setsysfs(mic->name, "state", "boot");
+				mic->boot_on_resume = 0;
+			}
+			break;
+		default:
+			break;
+		}
+		free(state);
+
+		ufds[0].fd = fd;
+		ufds[0].events = POLLERR | POLLPRI;
+		ret = poll(ufds, 1, -1);
+		if (ret < 0) {
+			mpsslog("%s: poll failed %s\n",
+				mic->name, strerror(errno));
+			goto close_error1;
+		}
+	} while (1);
+close_error:
+	free(state);
+close_error1:
+	close(fd);
+error:
+	init_mic(mic);
+	pthread_exit(NULL);
+}
+
+static void
+set_cmdline(struct mic_info *mic)
+{
+	char buffer[PATH_MAX];
+	int len;
+
+	len = snprintf(buffer, PATH_MAX,
+		"clocksource=tsc highres=off nohz=off ");
+	len += snprintf(buffer + len, PATH_MAX - len,
+		"cpufreq_on;corec6_off;pc3_off;pc6_off ");
+	len += snprintf(buffer + len, PATH_MAX - len,
+		"ifcfg=static;address,172.31.%d.1;netmask,255.255.255.0",
+		mic->id);
+
+	setsysfs(mic->name, "cmdline", buffer);
+	mpsslog("%s: Command line: \"%s\"\n", mic->name, buffer);
+	snprintf(buffer, PATH_MAX, "172.31.%d.1", mic->id);
+	mpsslog("%s: IPADDR: \"%s\"\n", mic->name, buffer);
+}
+
+static void
+set_log_buf_info(struct mic_info *mic)
+{
+	int fd;
+	off_t len;
+	char system_map[] = "/lib/firmware/mic/System.map";
+	char *map, *temp, log_buf[17] = {'\0'};
+
+	fd = open(system_map, O_RDONLY);
+	if (fd < 0) {
+		mpsslog("%s: Opening System.map failed: %d\n",
+			mic->name, errno);
+		return;
+	}
+	len = lseek(fd, 0, SEEK_END);
+	if (len < 0) {
+		mpsslog("%s: Reading System.map size failed: %d\n",
+			mic->name, errno);
+		close(fd);
+		return;
+	}
+	map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
+	if (map == MAP_FAILED) {
+		mpsslog("%s: mmap of System.map failed: %d\n",
+			mic->name, errno);
+		close(fd);
+		return;
+	}
+	temp = strstr(map, "__log_buf");
+	if (!temp) {
+		mpsslog("%s: __log_buf not found: %d\n", mic->name, errno);
+		munmap(map, len);
+		close(fd);
+		return;
+	}
+	strncpy(log_buf, temp - 19, 16);
+	setsysfs(mic->name, "log_buf_addr", log_buf);
+	mpsslog("%s: log_buf_addr: %s\n", mic->name, log_buf);
+	temp = strstr(map, "log_buf_len");
+	if (!temp) {
+		mpsslog("%s: log_buf_len not found: %d\n", mic->name, errno);
+		munmap(map, len);
+		close(fd);
+		return;
+	}
+	strncpy(log_buf, temp - 19, 16);
+	setsysfs(mic->name, "log_buf_len", log_buf);
+	mpsslog("%s: log_buf_len: %s\n", mic->name, log_buf);
+	munmap(map, len);
+	close(fd);
+}
+
+static void init_mic(struct mic_info *mic);
+
+static void
+change_virtblk_backend(int x, siginfo_t *siginfo, void *p)
+{
+	struct mic_info *mic;
+
+	for (mic = mic_list.next; mic != NULL; mic = mic->next)
+		mic->mic_virtblk.signaled = 1/* true */;
+}
+
+static void
+init_mic(struct mic_info *mic)
+{
+	struct sigaction ignore = {
+		.sa_flags = 0,
+		.sa_handler = SIG_IGN
+	};
+	struct sigaction act = {
+		.sa_flags = SA_SIGINFO,
+		.sa_sigaction = change_virtblk_backend,
+	};
+	char buffer[PATH_MAX];
+	int err;
+
+	/*
+	 * Currently, one virtio block device is supported for each MIC card
+	 * at a time. Any user (or test) can send a SIGUSR1 to the MIC daemon.
+	 * The signal informs the virtio block backend about a change in the
+	 * configuration file which specifies the virtio backend file name on
+	 * the host. Virtio block backend then re-reads the configuration file
+	 * and switches to the new block device. This signalling mechanism may
+	 * not be required once multiple virtio block devices are supported by
+	 * the MIC daemon.
+	 */
+	sigaction(SIGUSR1, &ignore, NULL);
+
+	mic->pid = fork();
+	switch (mic->pid) {
+	case 0:
+		set_log_buf_info(mic);
+		set_cmdline(mic);
+		add_virtio_device(mic, &virtcons_dev_page.dd);
+		add_virtio_device(mic, &virtnet_dev_page.dd);
+		err = pthread_create(&mic->mic_console.console_thread, NULL,
+			virtio_console, mic);
+		if (err)
+			mpsslog("%s virtcons pthread_create failed %s\n",
+				mic->name, strerror(err));
+		err = pthread_create(&mic->mic_net.net_thread, NULL,
+			virtio_net, mic);
+		if (err)
+			mpsslog("%s virtnet pthread_create failed %s\n",
+				mic->name, strerror(err));
+		err = pthread_create(&mic->mic_virtblk.block_thread, NULL,
+			virtio_block, mic);
+		if (err)
+			mpsslog("%s virtblk pthread_create failed %s\n",
+				mic->name, strerror(err));
+		sigemptyset(&act.sa_mask);
+		err = sigaction(SIGUSR1, &act, NULL);
+		if (err)
+			mpsslog("%s sigaction SIGUSR1 failed %s\n",
+				mic->name, strerror(errno));
+		while (1)
+			sleep(60);
+	case -1:
+		mpsslog("fork failed MIC name %s id %d errno %d\n",
+			mic->name, mic->id, errno);
+		break;
+	default:
+		if (mic->restart) {
+			snprintf(buffer, PATH_MAX, "boot");
+			setsysfs(mic->name, "state", buffer);
+			mpsslog("%s restarting mic %d\n",
+				mic->name, mic->restart);
+			mic->restart = 0;
+		}
+		pthread_create(&mic->config_thread, NULL, mic_config, mic);
+	}
+}
+
+static void
+start_daemon(void)
+{
+	struct mic_info *mic;
+
+	for (mic = mic_list.next; mic != NULL; mic = mic->next)
+		init_mic(mic);
+
+	while (1)
+		sleep(60);
+}
+
+static int
+init_mic_list(void)
+{
+	struct mic_info *mic = &mic_list;
+	struct dirent *file;
+	DIR *dp;
+	int cnt = 0;
+
+	dp = opendir(MICSYSFSDIR);
+	if (!dp)
+		return 0;
+
+	while ((file = readdir(dp)) != NULL) {
+		if (!strncmp(file->d_name, "mic", 3)) {
+			mic->next = calloc(1, sizeof(struct mic_info));
+			if (mic->next) {
+				mic = mic->next;
+				mic->id = atoi(&file->d_name[3]);
+				mic->name = malloc(strlen(file->d_name) + 16);
+				if (mic->name)
+					strcpy(mic->name, file->d_name);
+				mpsslog("MIC name %s id %d\n", mic->name,
+					mic->id);
+				cnt++;
+			}
+		}
+	}
+
+	closedir(dp);
+	return cnt;
+}
+
+void
+mpsslog(char *format, ...)
+{
+	va_list args;
+	char buffer[4096];
+	char ts[52], *ts1;
+	time_t t;
+
+	if (logfp == NULL)
+		return;
+
+	va_start(args, format);
+	vsprintf(buffer, format, args);
+	va_end(args);
+
+	time(&t);
+	ts1 = ctime_r(&t, ts);
+	ts1[strlen(ts1) - 1] = '\0';
+	fprintf(logfp, "%s: %s", ts1, buffer);
+
+	fflush(logfp);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int cnt;
+	pid_t pid;
+
+	myname = argv[0];
+
+	logfp = fopen(LOGFILE_NAME, "a+");
+	if (!logfp) {
+		fprintf(stderr, "cannot open logfile '%s'\n", LOGFILE_NAME);
+		exit(1);
+	}
+	pid = fork();
+	switch (pid) {
+	case 0:
+		break;
+	case -1:
+		exit(2);
+	default:
+		exit(0);
+	}
+
+	mpsslog("MIC Daemon start\n");
+
+	cnt = init_mic_list();
+	if (cnt == 0) {
+		mpsslog("MIC module not loaded\n");
+		exit(3);
+	}
+	mpsslog("MIC found %d devices\n", cnt);
+
+	start_daemon();
+
+	exit(0);
+}
--- /dev/null
+++ b/samples/mic/mpssd/mpssd.h
@@ -0,0 +1,102 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC User Space Tools.
+ */
+#ifndef _MPSSD_H_
+#define _MPSSD_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <libgen.h>
+#include <pthread.h>
+#include <stdarg.h>
+#include <time.h>
+#include <errno.h>
+#include <sys/dir.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/utsname.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <pthread.h>
+#include <signal.h>
+#include <limits.h>
+#include <syslog.h>
+#include <getopt.h>
+#include <net/if.h>
+#include <linux/if_tun.h>
+#include <linux/if_tun.h>
+#include <linux/virtio_ids.h>
+
+#define MICSYSFSDIR "/sys/class/mic"
+#define LOGFILE_NAME "/var/log/mpssd"
+#define PAGE_SIZE 4096
+
+struct mic_console_info {
+	pthread_t       console_thread;
+	int		virtio_console_fd;
+	void		*console_dp;
+};
+
+struct mic_net_info {
+	pthread_t       net_thread;
+	int		virtio_net_fd;
+	int		tap_fd;
+	void		*net_dp;
+};
+
+struct mic_virtblk_info {
+	pthread_t       block_thread;
+	int		virtio_block_fd;
+	void		*block_dp;
+	volatile sig_atomic_t	signaled;
+	char		*backend_file;
+	int		backend;
+	void		*backend_addr;
+	long		backend_size;
+};
+
+struct mic_info {
+	int		id;
+	char		*name;
+	pthread_t       config_thread;
+	pid_t		pid;
+	struct mic_console_info	mic_console;
+	struct mic_net_info	mic_net;
+	struct mic_virtblk_info	mic_virtblk;
+	int		restart;
+	int		boot_on_resume;
+	struct mic_info *next;
+};
+
+__attribute__((format(printf, 1, 2)))
+void mpsslog(char *format, ...);
+char *readsysfs(char *dir, char *entry);
+int setsysfs(char *dir, char *entry, char *value);
+#endif
--- /dev/null
+++ b/samples/mic/mpssd/sysfs.c
@@ -0,0 +1,102 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC User Space Tools.
+ */
+
+#include "mpssd.h"
+
+#define PAGE_SIZE 4096
+
+char *
+readsysfs(char *dir, char *entry)
+{
+	char filename[PATH_MAX];
+	char value[PAGE_SIZE];
+	char *string = NULL;
+	int fd;
+	int len;
+
+	if (dir == NULL)
+		snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
+	else
+		snprintf(filename, PATH_MAX,
+			 "%s/%s/%s", MICSYSFSDIR, dir, entry);
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		mpsslog("Failed to open sysfs entry '%s': %s\n",
+			filename, strerror(errno));
+		return NULL;
+	}
+
+	len = read(fd, value, sizeof(value));
+	if (len < 0) {
+		mpsslog("Failed to read sysfs entry '%s': %s\n",
+			filename, strerror(errno));
+		goto readsys_ret;
+	}
+	if (len == 0)
+		goto readsys_ret;
+
+	value[len - 1] = '\0';
+
+	string = malloc(strlen(value) + 1);
+	if (string)
+		strcpy(string, value);
+
+readsys_ret:
+	close(fd);
+	return string;
+}
+
+int
+setsysfs(char *dir, char *entry, char *value)
+{
+	char filename[PATH_MAX];
+	char *oldvalue;
+	int fd, ret = 0;
+
+	if (dir == NULL)
+		snprintf(filename, PATH_MAX, "%s/%s", MICSYSFSDIR, entry);
+	else
+		snprintf(filename, PATH_MAX, "%s/%s/%s",
+			 MICSYSFSDIR, dir, entry);
+
+	oldvalue = readsysfs(dir, entry);
+
+	fd = open(filename, O_RDWR);
+	if (fd < 0) {
+		ret = errno;
+		mpsslog("Failed to open sysfs entry '%s': %s\n",
+			filename, strerror(errno));
+		goto done;
+	}
+
+	if (!oldvalue || strcmp(value, oldvalue)) {
+		if (write(fd, value, strlen(value)) < 0) {
+			ret = errno;
+			mpsslog("Failed to write new sysfs entry '%s': %s\n",
+				filename, strerror(errno));
+		}
+	}
+	close(fd);
+done:
+	if (oldvalue)
+		free(oldvalue);
+	return ret;
+}