[linux.git] / net / rds / iw.c

/*
 * Copyright (c) 2006 Oracle.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/kernel.h>
#include <linux/in.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>

#include "rds.h"
#include "iw.h"

unsigned int fastreg_pool_size = RDS_FASTREG_POOL_SIZE;
unsigned int fastreg_message_size = RDS_FASTREG_SIZE + 1; /* +1 allows for unaligned MRs */

module_param(fastreg_pool_size, int, 0444);
MODULE_PARM_DESC(fastreg_pool_size, " Max number of fastreg MRs per device");
module_param(fastreg_message_size, int, 0444);
MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MRs)");

struct list_head rds_iw_devices;

/* NOTE: if also grabbing iwdev lock, grab this first */
DEFINE_SPINLOCK(iw_nodev_conns_lock);
LIST_HEAD(iw_nodev_conns);

void rds_iw_add_one(struct ib_device *device)
{
	struct rds_iw_device *rds_iwdev;
	struct ib_device_attr *dev_attr;

	/* Only handle iwarp devices */
	if (device->node_type != RDMA_NODE_RNIC)
		return;

	dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
	if (!dev_attr)
		return;

	if (ib_query_device(device, dev_attr)) {
		rdsdebug("Query device failed for %s\n", device->name);
		goto free_attr;
	}

	rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL);
	if (!rds_iwdev)
		goto free_attr;

	spin_lock_init(&rds_iwdev->spinlock);

	rds_iwdev->dma_local_lkey = !!(dev_attr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY);
	rds_iwdev->max_wrs = dev_attr->max_qp_wr;
	rds_iwdev->max_sge = min(dev_attr->max_sge, RDS_IW_MAX_SGE);

	rds_iwdev->page_shift = max(PAGE_SHIFT, ffs(dev_attr->page_size_cap) - 1);

	rds_iwdev->dev = device;
	rds_iwdev->pd = ib_alloc_pd(device);
	if (IS_ERR(rds_iwdev->pd))
		goto free_dev;

	if (!rds_iwdev->dma_local_lkey) {
		if (device->node_type != RDMA_NODE_RNIC) {
			rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
						IB_ACCESS_LOCAL_WRITE);
		} else {
			rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
						IB_ACCESS_REMOTE_READ |
						IB_ACCESS_REMOTE_WRITE |
						IB_ACCESS_LOCAL_WRITE);
		}
		if (IS_ERR(rds_iwdev->mr))
			goto err_pd;
	} else
		rds_iwdev->mr = NULL;

	rds_iwdev->mr_pool = rds_iw_create_mr_pool(rds_iwdev);
	if (IS_ERR(rds_iwdev->mr_pool)) {
		rds_iwdev->mr_pool = NULL;
		goto err_mr;
	}

	INIT_LIST_HEAD(&rds_iwdev->cm_id_list);
	INIT_LIST_HEAD(&rds_iwdev->conn_list);
	list_add_tail(&rds_iwdev->list, &rds_iw_devices);

	ib_set_client_data(device, &rds_iw_client, rds_iwdev);

	goto free_attr;

err_mr:
	if (rds_iwdev->mr)
		ib_dereg_mr(rds_iwdev->mr);
err_pd:
	ib_dealloc_pd(rds_iwdev->pd);
free_dev:
	kfree(rds_iwdev);
free_attr:
	kfree(dev_attr);
}

void rds_iw_remove_one(struct ib_device *device)
{
	struct rds_iw_device *rds_iwdev;
	struct rds_iw_cm_id *i_cm_id, *next;

	rds_iwdev = ib_get_client_data(device, &rds_iw_client);
	if (!rds_iwdev)
		return;

	spin_lock_irq(&rds_iwdev->spinlock);
	list_for_each_entry_safe(i_cm_id, next, &rds_iwdev->cm_id_list, list) {
		list_del(&i_cm_id->list);
		kfree(i_cm_id);
	}
	spin_unlock_irq(&rds_iwdev->spinlock);

	rds_iw_destroy_conns(rds_iwdev);

	if (rds_iwdev->mr_pool)
		rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);

	if (rds_iwdev->mr)
		ib_dereg_mr(rds_iwdev->mr);

	while (ib_dealloc_pd(rds_iwdev->pd)) {
		rdsdebug("Failed to dealloc pd %p\n", rds_iwdev->pd);
		msleep(1);
	}

	list_del(&rds_iwdev->list);
	kfree(rds_iwdev);
}

struct ib_client rds_iw_client = {
	.name   = "rds_iw",
	.add    = rds_iw_add_one,
	.remove = rds_iw_remove_one
};

static int rds_iw_conn_info_visitor(struct rds_connection *conn,
				    void *buffer)
{
	struct rds_info_rdma_connection *iinfo = buffer;
	struct rds_iw_connection *ic;

	/* We will only ever look at IB transports */
	if (conn->c_trans != &rds_iw_transport)
		return 0;

	iinfo->src_addr = conn->c_laddr;
	iinfo->dst_addr = conn->c_faddr;

	memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
	memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
	if (rds_conn_state(conn) == RDS_CONN_UP) {
		struct rds_iw_device *rds_iwdev;
		struct rdma_dev_addr *dev_addr;

		ic = conn->c_transport_data;
		dev_addr = &ic->i_cm_id->route.addr.dev_addr;

		ib_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
		ib_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);

		rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
		iinfo->max_send_wr = ic->i_send_ring.w_nr;
		iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
		iinfo->max_send_sge = rds_iwdev->max_sge;
		rds_iw_get_mr_info(rds_iwdev, iinfo);
	}
	return 1;
}

static void rds_iw_ic_info(struct socket *sock, unsigned int len,
			   struct rds_info_iterator *iter,
			   struct rds_info_lengths *lens)
{
	rds_for_each_conn_info(sock, len, iter, lens,
				rds_iw_conn_info_visitor,
				sizeof(struct rds_info_rdma_connection));
}


/*
 * Early RDS/IB was built to only bind to an address if there is an IPoIB
 * device with that address set.
 *
 * If it were me, I'd advocate for something more flexible.  Sending and
 * receiving should be device-agnostic.  Transports would try and maintain
 * connections between peers who have messages queued.  Userspace would be
 * allowed to influence which paths have priority.  We could call userspace
 * asserting this policy "routing".
 */
static int rds_iw_laddr_check(__be32 addr)
{
	int ret;
	struct rdma_cm_id *cm_id;
	struct sockaddr_in sin;

	/* Create a CMA ID and try to bind it. This catches both
	 * IB and iWARP capable NICs.
	 */
	cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
	if (IS_ERR(cm_id))
		return PTR_ERR(cm_id);

	memset(&sin, 0, sizeof(sin));
	sin.sin_family = AF_INET;
	sin.sin_addr.s_addr = addr;

	/* rdma_bind_addr will only succeed for IB & iWARP devices */
	ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
	/* due to this, we will claim to support IB devices unless we
	   check node_type. */
	if (ret || cm_id->device->node_type != RDMA_NODE_RNIC)
		ret = -EADDRNOTAVAIL;

	rdsdebug("addr %pI4 ret %d node type %d\n",
		&addr, ret,
		cm_id->device ? cm_id->device->node_type : -1);

	rdma_destroy_id(cm_id);

	return ret;
}

void rds_iw_exit(void)
{
	rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
	rds_iw_destroy_nodev_conns();
	ib_unregister_client(&rds_iw_client);
	rds_iw_sysctl_exit();
	rds_iw_recv_exit();
	rds_trans_unregister(&rds_iw_transport);
}

struct rds_transport rds_iw_transport = {
	.laddr_check		= rds_iw_laddr_check,
	.xmit_complete		= rds_iw_xmit_complete,
	.xmit			= rds_iw_xmit,
	.xmit_cong_map		= NULL,
	.xmit_rdma		= rds_iw_xmit_rdma,
	.recv			= rds_iw_recv,
	.conn_alloc		= rds_iw_conn_alloc,
	.conn_free		= rds_iw_conn_free,
	.conn_connect		= rds_iw_conn_connect,
	.conn_shutdown		= rds_iw_conn_shutdown,
	.inc_copy_to_user	= rds_iw_inc_copy_to_user,
	.inc_purge		= rds_iw_inc_purge,
	.inc_free		= rds_iw_inc_free,
	.cm_initiate_connect	= rds_iw_cm_initiate_connect,
	.cm_handle_connect	= rds_iw_cm_handle_connect,
	.cm_connect_complete	= rds_iw_cm_connect_complete,
	.stats_info_copy	= rds_iw_stats_info_copy,
	.exit			= rds_iw_exit,
	.get_mr			= rds_iw_get_mr,
	.sync_mr		= rds_iw_sync_mr,
	.free_mr		= rds_iw_free_mr,
	.flush_mrs		= rds_iw_flush_mrs,
	.t_owner		= THIS_MODULE,
	.t_name			= "iwarp",
	.t_prefer_loopback	= 1,
};

int __init rds_iw_init(void)
{
	int ret;

	INIT_LIST_HEAD(&rds_iw_devices);

	ret = ib_register_client(&rds_iw_client);
	if (ret)
		goto out;

	ret = rds_iw_sysctl_init();
	if (ret)
		goto out_ibreg;

	ret = rds_iw_recv_init();
	if (ret)
		goto out_sysctl;

	ret = rds_trans_register(&rds_iw_transport);
	if (ret)
		goto out_recv;

	rds_info_register_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);

	goto out;

out_recv:
	rds_iw_recv_exit();
out_sysctl:
	rds_iw_sysctl_exit();
out_ibreg:
	ib_unregister_client(&rds_iw_client);
out:
	return ret;
}

MODULE_LICENSE("GPL");
Commit	Line	Data
fcd8b7c0 AG	1	/*
	2	* Copyright (c) 2006 Oracle. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*
	32	*/
	33	#include <linux/kernel.h>
	34	#include <linux/in.h>
	35	#include <linux/if.h>
	36	#include <linux/netdevice.h>
	37	#include <linux/inetdevice.h>
	38	#include <linux/if_arp.h>
	39	#include <linux/delay.h>
	40
	41	#include "rds.h"
	42	#include "iw.h"
	43
	44	unsigned int fastreg_pool_size = RDS_FASTREG_POOL_SIZE;
	45	unsigned int fastreg_message_size = RDS_FASTREG_SIZE + 1; /* +1 allows for unaligned MRs */
	46
	47	module_param(fastreg_pool_size, int, 0444);
	48	MODULE_PARM_DESC(fastreg_pool_size, " Max number of fastreg MRs per device");
	49	module_param(fastreg_message_size, int, 0444);
	50	MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MRs)");
	51
	52	struct list_head rds_iw_devices;
	53
745cbcca	54	/* NOTE: if also grabbing iwdev lock, grab this first */
fcd8b7c0 AG	55	DEFINE_SPINLOCK(iw_nodev_conns_lock);
	56	LIST_HEAD(iw_nodev_conns);
	57
	58	void rds_iw_add_one(struct ib_device *device)
	59	{
	60	struct rds_iw_device *rds_iwdev;
	61	struct ib_device_attr *dev_attr;
	62
	63	/* Only handle iwarp devices */
	64	if (device->node_type != RDMA_NODE_RNIC)
	65	return;
	66
	67	dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
	68	if (!dev_attr)
	69	return;
	70
	71	if (ib_query_device(device, dev_attr)) {
	72	rdsdebug("Query device failed for %s\n", device->name);
	73	goto free_attr;
	74	}
	75
	76	rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL);
	77	if (!rds_iwdev)
	78	goto free_attr;
	79
	80	spin_lock_init(&rds_iwdev->spinlock);
	81
	82	rds_iwdev->dma_local_lkey = !!(dev_attr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY);
	83	rds_iwdev->max_wrs = dev_attr->max_qp_wr;
	84	rds_iwdev->max_sge = min(dev_attr->max_sge, RDS_IW_MAX_SGE);
	85
	86	rds_iwdev->page_shift = max(PAGE_SHIFT, ffs(dev_attr->page_size_cap) - 1);
	87
	88	rds_iwdev->dev = device;
	89	rds_iwdev->pd = ib_alloc_pd(device);
	90	if (IS_ERR(rds_iwdev->pd))
	91	goto free_dev;
	92
	93	if (!rds_iwdev->dma_local_lkey) {
	94	if (device->node_type != RDMA_NODE_RNIC) {
	95	rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
	96	IB_ACCESS_LOCAL_WRITE);
	97	} else {
	98	rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
	99	IB_ACCESS_REMOTE_READ \|
	100	IB_ACCESS_REMOTE_WRITE \|
	101	IB_ACCESS_LOCAL_WRITE);
	102	}
	103	if (IS_ERR(rds_iwdev->mr))
	104	goto err_pd;
	105	} else
	106	rds_iwdev->mr = NULL;
	107
	108	rds_iwdev->mr_pool = rds_iw_create_mr_pool(rds_iwdev);
	109	if (IS_ERR(rds_iwdev->mr_pool)) {
	110	rds_iwdev->mr_pool = NULL;
	111	goto err_mr;
	112	}
	113
	114	INIT_LIST_HEAD(&rds_iwdev->cm_id_list);
	115	INIT_LIST_HEAD(&rds_iwdev->conn_list);
	116	list_add_tail(&rds_iwdev->list, &rds_iw_devices);
	117
	118	ib_set_client_data(device, &rds_iw_client, rds_iwdev);
119
120	goto free_attr;
121
122	err_mr:
123	if (rds_iwdev->mr)
124	ib_dereg_mr(rds_iwdev->mr);
125	err_pd:
126	ib_dealloc_pd(rds_iwdev->pd);
127	free_dev:
128	kfree(rds_iwdev);
129	free_attr:
130	kfree(dev_attr);
131	}
132
133	void rds_iw_remove_one(struct ib_device *device)
134	{
135	struct rds_iw_device *rds_iwdev;
136	struct rds_iw_cm_id i_cm_id, next;
137
138	rds_iwdev = ib_get_client_data(device, &rds_iw_client);
139	if (!rds_iwdev)
140	return;
141
142	spin_lock_irq(&rds_iwdev->spinlock);
143	list_for_each_entry_safe(i_cm_id, next, &rds_iwdev->cm_id_list, list) {
144	list_del(&i_cm_id->list);
145	kfree(i_cm_id);
146	}
147	spin_unlock_irq(&rds_iwdev->spinlock);
148
745cbcca	149	rds_iw_destroy_conns(rds_iwdev);
fcd8b7c0 AG	150
	151	if (rds_iwdev->mr_pool)
	152	rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);
	153
	154	if (rds_iwdev->mr)
	155	ib_dereg_mr(rds_iwdev->mr);
	156
	157	while (ib_dealloc_pd(rds_iwdev->pd)) {
	158	rdsdebug("Failed to dealloc pd %p\n", rds_iwdev->pd);
	159	msleep(1);
	160	}
	161
	162	list_del(&rds_iwdev->list);
	163	kfree(rds_iwdev);
	164	}
	165
	166	struct ib_client rds_iw_client = {
	167	.name = "rds_iw",
	168	.add = rds_iw_add_one,
	169	.remove = rds_iw_remove_one
	170	};
	171
	172	static int rds_iw_conn_info_visitor(struct rds_connection *conn,
	173	void *buffer)
	174	{
	175	struct rds_info_rdma_connection *iinfo = buffer;
	176	struct rds_iw_connection *ic;
	177
	178	/* We will only ever look at IB transports */
	179	if (conn->c_trans != &rds_iw_transport)
	180	return 0;
	181
	182	iinfo->src_addr = conn->c_laddr;
	183	iinfo->dst_addr = conn->c_faddr;
	184
	185	memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
	186	memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
	187	if (rds_conn_state(conn) == RDS_CONN_UP) {
	188	struct rds_iw_device *rds_iwdev;
	189	struct rdma_dev_addr *dev_addr;
	190
	191	ic = conn->c_transport_data;
	192	dev_addr = &ic->i_cm_id->route.addr.dev_addr;
	193
	194	ib_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
	195	ib_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
	196
	197	rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
	198	iinfo->max_send_wr = ic->i_send_ring.w_nr;
	199	iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
	200	iinfo->max_send_sge = rds_iwdev->max_sge;
	201	rds_iw_get_mr_info(rds_iwdev, iinfo);
	202	}
	203	return 1;
	204	}
	205
	206	static void rds_iw_ic_info(struct socket *sock, unsigned int len,
	207	struct rds_info_iterator *iter,
	208	struct rds_info_lengths *lens)
	209	{
	210	rds_for_each_conn_info(sock, len, iter, lens,
	211	rds_iw_conn_info_visitor,
	212	sizeof(struct rds_info_rdma_connection));
	213	}
214
215
216	/*
217	* Early RDS/IB was built to only bind to an address if there is an IPoIB
218	* device with that address set.
219	*
220	* If it were me, I'd advocate for something more flexible. Sending and
221	* receiving should be device-agnostic. Transports would try and maintain
222	* connections between peers who have messages queued. Userspace would be
223	* allowed to influence which paths have priority. We could call userspace
224	* asserting this policy "routing".
225	*/
226	static int rds_iw_laddr_check(__be32 addr)
227	{
228	int ret;
229	struct rdma_cm_id *cm_id;
230	struct sockaddr_in sin;
231
232	/* Create a CMA ID and try to bind it. This catches both
233	* IB and iWARP capable NICs.
234	*/
235	cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
5d57eeb5 DC	236	if (IS_ERR(cm_id))
5d57eeb5 DC	237	return PTR_ERR(cm_id);
fcd8b7c0 AG	238
	239	memset(&sin, 0, sizeof(sin));
	240	sin.sin_family = AF_INET;
	241	sin.sin_addr.s_addr = addr;
	242
	243	/* rdma_bind_addr will only succeed for IB & iWARP devices */
	244	ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
	245	/* due to this, we will claim to support IB devices unless we
	246	check node_type. */
	247	if (ret \|\| cm_id->device->node_type != RDMA_NODE_RNIC)
	248	ret = -EADDRNOTAVAIL;
	249
	250	rdsdebug("addr %pI4 ret %d node type %d\n",
	251	&addr, ret,
	252	cm_id->device ? cm_id->device->node_type : -1);
	253
	254	rdma_destroy_id(cm_id);
	255
	256	return ret;
	257	}
	258
	259	void rds_iw_exit(void)
	260	{
	261	rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
745cbcca	262	rds_iw_destroy_nodev_conns();
fcd8b7c0 AG	263	ib_unregister_client(&rds_iw_client);
	264	rds_iw_sysctl_exit();
	265	rds_iw_recv_exit();
	266	rds_trans_unregister(&rds_iw_transport);
	267	}
	268
	269	struct rds_transport rds_iw_transport = {
	270	.laddr_check = rds_iw_laddr_check,
	271	.xmit_complete = rds_iw_xmit_complete,
	272	.xmit = rds_iw_xmit,
	273	.xmit_cong_map = NULL,
	274	.xmit_rdma = rds_iw_xmit_rdma,
	275	.recv = rds_iw_recv,
	276	.conn_alloc = rds_iw_conn_alloc,
	277	.conn_free = rds_iw_conn_free,
	278	.conn_connect = rds_iw_conn_connect,
	279	.conn_shutdown = rds_iw_conn_shutdown,
	280	.inc_copy_to_user = rds_iw_inc_copy_to_user,
	281	.inc_purge = rds_iw_inc_purge,
	282	.inc_free = rds_iw_inc_free,
	283	.cm_initiate_connect = rds_iw_cm_initiate_connect,
	284	.cm_handle_connect = rds_iw_cm_handle_connect,
	285	.cm_connect_complete = rds_iw_cm_connect_complete,
	286	.stats_info_copy = rds_iw_stats_info_copy,
	287	.exit = rds_iw_exit,
	288	.get_mr = rds_iw_get_mr,
	289	.sync_mr = rds_iw_sync_mr,
	290	.free_mr = rds_iw_free_mr,
	291	.flush_mrs = rds_iw_flush_mrs,
	292	.t_owner = THIS_MODULE,
	293	.t_name = "iwarp",
	294	.t_prefer_loopback = 1,
	295	};
	296
	297	int __init rds_iw_init(void)
	298	{
	299	int ret;
	300
	301	INIT_LIST_HEAD(&rds_iw_devices);
	302
	303	ret = ib_register_client(&rds_iw_client);
	304	if (ret)
	305	goto out;
	306
	307	ret = rds_iw_sysctl_init();
	308	if (ret)
	309	goto out_ibreg;
	310
	311	ret = rds_iw_recv_init();
	312	if (ret)
	313	goto out_sysctl;
	314
	315	ret = rds_trans_register(&rds_iw_transport);
	316	if (ret)
	317	goto out_recv;
	318
	319	rds_info_register_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
	320
	321	goto out;
	322
	323	out_recv:
	324	rds_iw_recv_exit();
	325	out_sysctl:
	326	rds_iw_sysctl_exit();
327	out_ibreg:
328	ib_unregister_client(&rds_iw_client);
329	out:
330	return ret;
331	}
332
333	MODULE_LICENSE("GPL");
334