1 files changed, 718 insertions, 0 deletions
diff --git a/debian/grub-extras/disabled/gpxe/src/drivers/net/ipoib.c b/debian/grub-extras/disabled/gpxe/src/drivers/net/ipoib.c
new file mode 100644
index 0000000..dde4ee5
--- /dev/null
+++ b/debian/grub-extras/disabled/gpxe/src/drivers/net/ipoib.c
@@ -0,0 +1,718 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <byteswap.h>
+#include <errno.h>
+#include <gpxe/if_arp.h>
+#include <gpxe/iobuf.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/infiniband.h>
+#include <gpxe/ib_pathrec.h>
+#include <gpxe/ib_mcast.h>
+#include <gpxe/ipoib.h>
+
+/** @file
+ *
+ * IP over Infiniband
+ */
+
+/** Number of IPoIB send work queue entries */
+#define IPOIB_NUM_SEND_WQES 2
+
+/** Number of IPoIB receive work queue entries */
+#define IPOIB_NUM_RECV_WQES 4
+
+/** Number of IPoIB completion entries */
+#define IPOIB_NUM_CQES 8
+
+/** An IPoIB device */
+struct ipoib_device {
+	/** Network device */
+	struct net_device *netdev;
+	/** Underlying Infiniband device */
+	struct ib_device *ibdev;
+	/** Completion queue */
+	struct ib_completion_queue *cq;
+	/** Queue pair */
+	struct ib_queue_pair *qp;
+	/** Broadcast MAC */
+	struct ipoib_mac broadcast;
+	/** Joined to IPv4 broadcast multicast group
+	 *
+	 * This flag indicates whether or not we have initiated the
+	 * join to the IPv4 broadcast multicast group.
+	 */
+	int broadcast_joined;
+	/** IPv4 broadcast multicast group membership */
+	struct ib_mc_membership broadcast_membership;
+};
+
+/** Broadcast IPoIB address */
+static struct ipoib_mac ipoib_broadcast = {
+	.qpn = htonl ( IB_QPN_BROADCAST ),
+	.gid.u.bytes = 	{ 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
+			  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff },
+};
+
+/****************************************************************************
+ *
+ * IPoIB peer cache
+ *
+ ****************************************************************************
+ */
+
+/**
+ * IPoIB peer address
+ *
+ * The IPoIB link-layer header is only four bytes long and so does not
+ * have sufficient room to store IPoIB MAC address(es).  We therefore
+ * maintain a cache of MAC addresses identified by a single-byte key,
+ * and abuse the spare two bytes within the link-layer header to
+ * communicate these MAC addresses between the link-layer code and the
+ * netdevice driver.
+ */
+struct ipoib_peer {
+	/** Key */
+	uint8_t key;
+	/** MAC address */
+	struct ipoib_mac mac;
+};
+
+/** Number of IPoIB peer cache entries
+ *
+ * Must be a power of two.
+ */
+#define IPOIB_NUM_CACHED_PEERS 4
+
+/** IPoIB peer address cache */
+static struct ipoib_peer ipoib_peer_cache[IPOIB_NUM_CACHED_PEERS];
+
+/** Oldest IPoIB peer cache entry index */
+static unsigned int ipoib_peer_cache_idx = 1;
+
+/**
+ * Look up cached peer by key
+ *
+ * @v key		Peer cache key
+ * @ret peer		Peer cache entry, or NULL
+ */
+static struct ipoib_peer * ipoib_lookup_peer_by_key ( unsigned int key ) {
+	struct ipoib_peer *peer;
+	unsigned int i;
+
+	for ( i = 0 ; i < IPOIB_NUM_CACHED_PEERS ; i++ ) {
+		peer = &ipoib_peer_cache[i];
+		if ( peer->key == key )
+			return peer;
+	}
+
+	if ( key != 0 ) {
+		DBG ( "IPoIB warning: peer cache lost track of key %x while "
+		      "still in use\n", key );
+	}
+	return NULL;
+}
+
+/**
+ * Store GID and QPN in peer cache
+ *
+ * @v gid		Peer GID
+ * @v qpn		Peer QPN
+ * @ret peer		Peer cache entry
+ */
+static struct ipoib_peer * ipoib_cache_peer ( const struct ipoib_mac *mac ) {
+	struct ipoib_peer *peer;
+	unsigned int key;
+	unsigned int i;
+
+	/* Look for existing cache entry */
+	for ( i = 0 ; i < IPOIB_NUM_CACHED_PEERS ; i++ ) {
+		peer = &ipoib_peer_cache[i];
+		if ( memcmp ( &peer->mac, mac, sizeof ( peer->mac ) ) == 0 )
+			return peer;
+	}
+
+	/* No entry found: create a new one */
+	key = ipoib_peer_cache_idx++;
+	peer = &ipoib_peer_cache[ key % IPOIB_NUM_CACHED_PEERS ];
+	if ( peer->key )
+		DBG ( "IPoIB peer %x evicted from cache\n", peer->key );
+
+	memset ( peer, 0, sizeof ( *peer ) );
+	peer->key = key;
+	memcpy ( &peer->mac, mac, sizeof ( peer->mac ) );
+	DBG ( "IPoIB peer %x has MAC %s\n",
+	      peer->key, ipoib_ntoa ( &peer->mac ) );
+	return peer;
+}
+
+/****************************************************************************
+ *
+ * IPoIB link layer
+ *
+ ****************************************************************************
+ */
+
+/**
+ * Add IPoIB link-layer header
+ *
+ * @v netdev		Network device
+ * @v iobuf		I/O buffer
+ * @v ll_dest		Link-layer destination address
+ * @v ll_source		Source link-layer address
+ * @v net_proto		Network-layer protocol, in network-byte order
+ * @ret rc		Return status code
+ */
+static int ipoib_push ( struct net_device *netdev __unused,
+			struct io_buffer *iobuf, const void *ll_dest,
+			const void *ll_source __unused, uint16_t net_proto ) {
+	struct ipoib_hdr *ipoib_hdr =
+		iob_push ( iobuf, sizeof ( *ipoib_hdr ) );
+	const struct ipoib_mac *dest_mac = ll_dest;
+	const struct ipoib_mac *src_mac = ll_source;
+	struct ipoib_peer *dest;
+	struct ipoib_peer *src;
+
+	/* Add link-layer addresses to cache */
+	dest = ipoib_cache_peer ( dest_mac );
+	src = ipoib_cache_peer ( src_mac );
+
+	/* Build IPoIB header */
+	ipoib_hdr->proto = net_proto;
+	ipoib_hdr->u.peer.dest = dest->key;
+	ipoib_hdr->u.peer.src = src->key;
+
+	return 0;
+}
+
+/**
+ * Remove IPoIB link-layer header
+ *
+ * @v netdev		Network device
+ * @v iobuf		I/O buffer
+ * @ret ll_dest		Link-layer destination address
+ * @ret ll_source	Source link-layer address
+ * @ret net_proto	Network-layer protocol, in network-byte order
+ * @ret rc		Return status code
+ */
+static int ipoib_pull ( struct net_device *netdev,
+			struct io_buffer *iobuf, const void **ll_dest,
+			const void **ll_source, uint16_t *net_proto ) {
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ipoib_hdr *ipoib_hdr = iobuf->data;
+	struct ipoib_peer *dest;
+	struct ipoib_peer *source;
+
+	/* Sanity check */
+	if ( iob_len ( iobuf ) < sizeof ( *ipoib_hdr ) ) {
+		DBG ( "IPoIB packet too short for link-layer header\n" );
+		DBG_HD ( iobuf->data, iob_len ( iobuf ) );
+		return -EINVAL;
+	}
+
+	/* Strip off IPoIB header */
+	iob_pull ( iobuf, sizeof ( *ipoib_hdr ) );
+
+	/* Identify source and destination addresses, and clear
+	 * reserved word in IPoIB header
+	 */
+	dest = ipoib_lookup_peer_by_key ( ipoib_hdr->u.peer.dest );
+	source = ipoib_lookup_peer_by_key ( ipoib_hdr->u.peer.src );
+	ipoib_hdr->u.reserved = 0;
+
+	/* Fill in required fields */
+	*ll_dest = ( dest ? &dest->mac : &ipoib->broadcast );
+	*ll_source = ( source ? &source->mac : &ipoib->broadcast );
+	*net_proto = ipoib_hdr->proto;
+
+	return 0;
+}
+
+/**
+ * Initialise IPoIB link-layer address
+ *
+ * @v hw_addr		Hardware address
+ * @v ll_addr		Link-layer address
+ */
+static void ipoib_init_addr ( const void *hw_addr, void *ll_addr ) {
+	const struct ib_gid_half *guid = hw_addr;
+	struct ipoib_mac *mac = ll_addr;
+
+	memset ( mac, 0, sizeof ( *mac ) );
+	memcpy ( &mac->gid.u.half[1], guid, sizeof ( mac->gid.u.half[1] ) );
+}
+
+/**
+ * Transcribe IPoIB link-layer address
+ *
+ * @v ll_addr	Link-layer address
+ * @ret string	Link-layer address in human-readable format
+ */
+const char * ipoib_ntoa ( const void *ll_addr ) {
+	static char buf[45];
+	const struct ipoib_mac *mac = ll_addr;
+
+	snprintf ( buf, sizeof ( buf ), "%08x:%08x:%08x:%08x:%08x",
+		   htonl ( mac->qpn ), htonl ( mac->gid.u.dwords[0] ),
+		   htonl ( mac->gid.u.dwords[1] ),
+		   htonl ( mac->gid.u.dwords[2] ),
+		   htonl ( mac->gid.u.dwords[3] ) );
+	return buf;
+}
+
+/**
+ * Hash multicast address
+ *
+ * @v af		Address family
+ * @v net_addr		Network-layer address
+ * @v ll_addr		Link-layer address to fill in
+ * @ret rc		Return status code
+ */
+static int ipoib_mc_hash ( unsigned int af __unused,
+			   const void *net_addr __unused,
+			   void *ll_addr __unused ) {
+
+	return -ENOTSUP;
+}
+
+/** IPoIB protocol */
+struct ll_protocol ipoib_protocol __ll_protocol = {
+	.name		= "IPoIB",
+	.ll_proto	= htons ( ARPHRD_INFINIBAND ),
+	.hw_addr_len	= sizeof ( struct ib_gid_half ),
+	.ll_addr_len	= IPOIB_ALEN,
+	.ll_header_len	= IPOIB_HLEN,
+	.push		= ipoib_push,
+	.pull		= ipoib_pull,
+	.init_addr	= ipoib_init_addr,
+	.ntoa		= ipoib_ntoa,
+	.mc_hash	= ipoib_mc_hash,
+};
+
+/**
+ * Allocate IPoIB device
+ *
+ * @v priv_size		Size of driver private data
+ * @ret netdev		Network device, or NULL
+ */
+struct net_device * alloc_ipoibdev ( size_t priv_size ) {
+	struct net_device *netdev;
+
+	netdev = alloc_netdev ( priv_size );
+	if ( netdev ) {
+		netdev->ll_protocol = &ipoib_protocol;
+		netdev->ll_broadcast = ( uint8_t * ) &ipoib_broadcast;
+		netdev->max_pkt_len = IB_MAX_PAYLOAD_SIZE;
+	}
+	return netdev;
+}
+
+/****************************************************************************
+ *
+ * IPoIB network device
+ *
+ ****************************************************************************
+ */
+
+/**
+ * Transmit packet via IPoIB network device
+ *
+ * @v netdev		Network device
+ * @v iobuf		I/O buffer
+ * @ret rc		Return status code
+ */
+static int ipoib_transmit ( struct net_device *netdev,
+			    struct io_buffer *iobuf ) {
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ib_device *ibdev = ipoib->ibdev;
+	struct ipoib_hdr *ipoib_hdr;
+	struct ipoib_peer *dest;
+	struct ib_address_vector av;
+	int rc;
+
+	/* Sanity check */
+	if ( iob_len ( iobuf ) < sizeof ( *ipoib_hdr ) ) {
+		DBGC ( ipoib, "IPoIB %p buffer too short\n", ipoib );
+		return -EINVAL;
+	}
+	ipoib_hdr = iobuf->data;
+
+	/* Attempting transmission while link is down will put the
+	 * queue pair into an error state, so don't try it.
+	 */
+	if ( ! ib_link_ok ( ibdev ) )
+		return -ENETUNREACH;
+
+	/* Identify destination address */
+	dest = ipoib_lookup_peer_by_key ( ipoib_hdr->u.peer.dest );
+	if ( ! dest )
+		return -ENXIO;
+	ipoib_hdr->u.reserved = 0;
+
+	/* Construct address vector */
+	memset ( &av, 0, sizeof ( av ) );
+	av.qpn = ntohl ( dest->mac.qpn );
+	av.gid_present = 1;
+	memcpy ( &av.gid, &dest->mac.gid, sizeof ( av.gid ) );
+	if ( ( rc = ib_resolve_path ( ibdev, &av ) ) != 0 ) {
+		/* Path not resolved yet */
+		return rc;
+	}
+
+	return ib_post_send ( ibdev, ipoib->qp, &av, iobuf );
+}
+
+/**
+ * Handle IPoIB send completion
+ *
+ * @v ibdev		Infiniband device
+ * @v qp		Queue pair
+ * @v iobuf		I/O buffer
+ * @v rc		Completion status code
+ */
+static void ipoib_complete_send ( struct ib_device *ibdev __unused,
+				  struct ib_queue_pair *qp,
+				  struct io_buffer *iobuf, int rc ) {
+	struct ipoib_device *ipoib = ib_qp_get_ownerdata ( qp );
+
+	netdev_tx_complete_err ( ipoib->netdev, iobuf, rc );
+}
+
+/**
+ * Handle IPoIB receive completion
+ *
+ * @v ibdev		Infiniband device
+ * @v qp		Queue pair
+ * @v av		Address vector, or NULL
+ * @v iobuf		I/O buffer
+ * @v rc		Completion status code
+ */
+static void ipoib_complete_recv ( struct ib_device *ibdev __unused,
+				  struct ib_queue_pair *qp,
+				  struct ib_address_vector *av,
+				  struct io_buffer *iobuf, int rc ) {
+	struct ipoib_device *ipoib = ib_qp_get_ownerdata ( qp );
+	struct net_device *netdev = ipoib->netdev;
+	struct ipoib_hdr *ipoib_hdr;
+	struct ipoib_mac ll_src;
+	struct ipoib_peer *src;
+
+	if ( rc != 0 ) {
+		netdev_rx_err ( netdev, iobuf, rc );
+		return;
+	}
+
+	/* Sanity check */
+	if ( iob_len ( iobuf ) < sizeof ( struct ipoib_hdr ) ) {
+		DBGC ( ipoib, "IPoIB %p received packet too short to "
+		       "contain IPoIB header\n", ipoib );
+		DBGC_HD ( ipoib, iobuf->data, iob_len ( iobuf ) );
+		netdev_rx_err ( netdev, iobuf, -EIO );
+		return;
+	}
+	ipoib_hdr = iobuf->data;
+
+	/* Parse source address */
+	if ( av->gid_present ) {
+		ll_src.qpn = htonl ( av->qpn );
+		memcpy ( &ll_src.gid, &av->gid, sizeof ( ll_src.gid ) );
+		src = ipoib_cache_peer ( &ll_src );
+		ipoib_hdr->u.peer.src = src->key;
+	}
+
+	/* Hand off to network layer */
+	netdev_rx ( netdev, iobuf );
+}
+
+/** IPoIB completion operations */
+static struct ib_completion_queue_operations ipoib_cq_op = {
+	.complete_send = ipoib_complete_send,
+	.complete_recv = ipoib_complete_recv,
+};
+
+/**
+ * Poll IPoIB network device
+ *
+ * @v netdev		Network device
+ */
+static void ipoib_poll ( struct net_device *netdev ) {
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ib_device *ibdev = ipoib->ibdev;
+
+	ib_poll_eq ( ibdev );
+}
+
+/**
+ * Enable/disable interrupts on IPoIB network device
+ *
+ * @v netdev		Network device
+ * @v enable		Interrupts should be enabled
+ */
+static void ipoib_irq ( struct net_device *netdev __unused,
+			int enable __unused ) {
+	/* No implementation */
+}
+
+/**
+ * Handle IPv4 broadcast multicast group join completion
+ *
+ * @v ibdev		Infiniband device
+ * @v qp		Queue pair
+ * @v membership	Multicast group membership
+ * @v rc		Status code
+ * @v mad		Response MAD (or NULL on error)
+ */
+void ipoib_join_complete ( struct ib_device *ibdev __unused,
+			   struct ib_queue_pair *qp __unused,
+			   struct ib_mc_membership *membership, int rc,
+			   union ib_mad *mad __unused ) {
+	struct ipoib_device *ipoib = container_of ( membership,
+				   struct ipoib_device, broadcast_membership );
+
+	/* Record join status as link status */
+	netdev_link_err ( ipoib->netdev, rc );
+}
+
+/**
+ * Join IPv4 broadcast multicast group
+ *
+ * @v ipoib		IPoIB device
+ * @ret rc		Return status code
+ */
+static int ipoib_join_broadcast_group ( struct ipoib_device *ipoib ) {
+	int rc;
+
+	if ( ( rc = ib_mcast_join ( ipoib->ibdev, ipoib->qp,
+				    &ipoib->broadcast_membership,
+				    &ipoib->broadcast.gid,
+				    ipoib_join_complete ) ) != 0 ) {
+		DBGC ( ipoib, "IPoIB %p could not join broadcast group: %s\n",
+		       ipoib, strerror ( rc ) );
+		return rc;
+	}
+	ipoib->broadcast_joined = 1;
+
+	return 0;
+}
+
+/**
+ * Leave IPv4 broadcast multicast group
+ *
+ * @v ipoib		IPoIB device
+ */
+static void ipoib_leave_broadcast_group ( struct ipoib_device *ipoib ) {
+
+	if ( ipoib->broadcast_joined ) {
+		ib_mcast_leave ( ipoib->ibdev, ipoib->qp,
+				 &ipoib->broadcast_membership );
+		ipoib->broadcast_joined = 0;
+	}
+}
+
+/**
+ * Open IPoIB network device
+ *
+ * @v netdev		Network device
+ * @ret rc		Return status code
+ */
+static int ipoib_open ( struct net_device *netdev ) {
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ib_device *ibdev = ipoib->ibdev;
+	struct ipoib_mac *mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
+	int rc;
+
+	/* Open IB device */
+	if ( ( rc = ib_open ( ibdev ) ) != 0 ) {
+		DBGC ( ipoib, "IPoIB %p could not open device: %s\n",
+		       ipoib, strerror ( rc ) );
+		goto err_ib_open;
+	}
+
+	/* Allocate completion queue */
+	ipoib->cq = ib_create_cq ( ibdev, IPOIB_NUM_CQES, &ipoib_cq_op );
+	if ( ! ipoib->cq ) {
+		DBGC ( ipoib, "IPoIB %p could not allocate completion queue\n",
+		       ipoib );
+		rc = -ENOMEM;
+		goto err_create_cq;
+	}
+
+	/* Allocate queue pair */
+	ipoib->qp = ib_create_qp ( ibdev, IB_QPT_UD,
+				   IPOIB_NUM_SEND_WQES, ipoib->cq,
+				   IPOIB_NUM_RECV_WQES, ipoib->cq );
+	if ( ! ipoib->qp ) {
+		DBGC ( ipoib, "IPoIB %p could not allocate queue pair\n",
+		       ipoib );
+		rc = -ENOMEM;
+		goto err_create_qp;
+	}
+	ib_qp_set_ownerdata ( ipoib->qp, ipoib );
+
+	/* Update MAC address with QPN */
+	mac->qpn = htonl ( ipoib->qp->qpn );
+
+	/* Fill receive rings */
+	ib_refill_recv ( ibdev, ipoib->qp );
+
+	/* Fake a link status change to join the broadcast group */
+	ipoib_link_state_changed ( ibdev );
+
+	return 0;
+
+	ib_destroy_qp ( ibdev, ipoib->qp );
+ err_create_qp:
+	ib_destroy_cq ( ibdev, ipoib->cq );
+ err_create_cq:
+	ib_close ( ibdev );
+ err_ib_open:
+	return rc;
+}
+
+/**
+ * Close IPoIB network device
+ *
+ * @v netdev		Network device
+ */
+static void ipoib_close ( struct net_device *netdev ) {
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ib_device *ibdev = ipoib->ibdev;
+	struct ipoib_mac *mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
+
+	/* Leave broadcast group */
+	ipoib_leave_broadcast_group ( ipoib );
+
+	/* Remove QPN from MAC address */
+	mac->qpn = 0;
+
+	/* Tear down the queues */
+	ib_destroy_qp ( ibdev, ipoib->qp );
+	ib_destroy_cq ( ibdev, ipoib->cq );
+
+	/* Close IB device */
+	ib_close ( ibdev );
+}
+
+/** IPoIB network device operations */
+static struct net_device_operations ipoib_operations = {
+	.open		= ipoib_open,
+	.close		= ipoib_close,
+	.transmit	= ipoib_transmit,
+	.poll		= ipoib_poll,
+	.irq		= ipoib_irq,
+};
+
+/**
+ * Handle link status change
+ *
+ * @v ibdev		Infiniband device
+ */
+void ipoib_link_state_changed ( struct ib_device *ibdev ) {
+	struct net_device *netdev = ib_get_ownerdata ( ibdev );
+	struct ipoib_device *ipoib = netdev->priv;
+	struct ipoib_mac *mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
+	int rc;
+
+	/* Leave existing broadcast group */
+	ipoib_leave_broadcast_group ( ipoib );
+
+	/* Update MAC address based on potentially-new GID prefix */
+	memcpy ( &mac->gid.u.half[0], &ibdev->gid.u.half[0],
+		 sizeof ( mac->gid.u.half[0] ) );
+
+	/* Update broadcast GID based on potentially-new partition key */
+	ipoib->broadcast.gid.u.words[2] = htons ( ibdev->pkey );
+
+	/* Set net device link state to reflect Infiniband link state */
+	if ( ib_link_ok ( ibdev ) ) {
+		netdev_link_up ( netdev );
+	} else {
+		netdev_link_down ( netdev );
+	}
+
+	/* Join new broadcast group */
+	if ( ib_link_ok ( ibdev ) &&
+	     ( ( rc = ipoib_join_broadcast_group ( ipoib ) ) != 0 ) ) {
+		DBGC ( ipoib, "IPoIB %p could not rejoin broadcast group: "
+		       "%s\n", ipoib, strerror ( rc ) );
+		return;
+	}
+}
+
+/**
+ * Probe IPoIB device
+ *
+ * @v ibdev		Infiniband device
+ * @ret rc		Return status code
+ */
+int ipoib_probe ( struct ib_device *ibdev ) {
+	struct net_device *netdev;
+	struct ipoib_device *ipoib;
+	int rc;
+
+	/* Allocate network device */
+	netdev = alloc_ipoibdev ( sizeof ( *ipoib ) );
+	if ( ! netdev )
+		return -ENOMEM;
+	netdev_init ( netdev, &ipoib_operations );
+	ipoib = netdev->priv;
+	ib_set_ownerdata ( ibdev, netdev );
+	netdev->dev = ibdev->dev;
+	memset ( ipoib, 0, sizeof ( *ipoib ) );
+	ipoib->netdev = netdev;
+	ipoib->ibdev = ibdev;
+
+	/* Extract hardware address */
+	memcpy ( netdev->hw_addr, &ibdev->gid.u.half[1],
+		 sizeof ( ibdev->gid.u.half[1] ) );
+
+	/* Set default broadcast address */
+	memcpy ( &ipoib->broadcast, &ipoib_broadcast,
+		 sizeof ( ipoib->broadcast ) );
+	netdev->ll_broadcast = ( ( uint8_t * ) &ipoib->broadcast );
+
+	/* Register network device */
+	if ( ( rc = register_netdev ( netdev ) ) != 0 )
+		goto err_register_netdev;
+
+	return 0;
+
+ err_register_netdev:
+	netdev_nullify ( netdev );
+	netdev_put ( netdev );
+	return rc;
+}
+
+/**
+ * Remove IPoIB device
+ *
+ * @v ibdev		Infiniband device
+ */
+void ipoib_remove ( struct ib_device *ibdev ) {
+	struct net_device *netdev = ib_get_ownerdata ( ibdev );
+
+	unregister_netdev ( netdev );
+	netdev_nullify ( netdev );
+	netdev_put ( netdev );
+}