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ec16227e 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> | |
5a0e3ad6 | 40 | #include <linux/slab.h> |
3a9a231d | 41 | #include <linux/module.h> |
ec16227e | 42 | |
0cb43965 | 43 | #include "rds_single_path.h" |
ec16227e AG |
44 | #include "rds.h" |
45 | #include "ib.h" | |
f6df683f | 46 | #include "ib_mr.h" |
ec16227e | 47 | |
4f7bfb39 ZY |
48 | static unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE; |
49 | static unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE; | |
3ba23ade | 50 | unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT; |
ebeeb1ad | 51 | static atomic_t rds_ib_unloading; |
ec16227e | 52 | |
f6df683f | 53 | module_param(rds_ib_mr_1m_pool_size, int, 0444); |
54 | MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA"); | |
55 | module_param(rds_ib_mr_8k_pool_size, int, 0444); | |
56 | MODULE_PARM_DESC(rds_ib_mr_8k_pool_size, " Max number of 8K mr per HCA"); | |
3ba23ade AG |
57 | module_param(rds_ib_retry_count, int, 0444); |
58 | MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error"); | |
ec16227e | 59 | |
ea819867 ZB |
60 | /* |
61 | * we have a clumsy combination of RCU and a rwsem protecting this list | |
62 | * because it is used both in the get_mr fast path and while blocking in | |
63 | * the FMR flushing path. | |
64 | */ | |
65 | DECLARE_RWSEM(rds_ib_devices_lock); | |
ec16227e AG |
66 | struct list_head rds_ib_devices; |
67 | ||
745cbcca | 68 | /* NOTE: if also grabbing ibdev lock, grab this first */ |
ec16227e AG |
69 | DEFINE_SPINLOCK(ib_nodev_conns_lock); |
70 | LIST_HEAD(ib_nodev_conns); | |
71 | ||
ff51bf84 | 72 | static void rds_ib_nodev_connect(void) |
fc19de38 ZB |
73 | { |
74 | struct rds_ib_connection *ic; | |
75 | ||
76 | spin_lock(&ib_nodev_conns_lock); | |
77 | list_for_each_entry(ic, &ib_nodev_conns, ib_node) | |
78 | rds_conn_connect_if_down(ic->conn); | |
79 | spin_unlock(&ib_nodev_conns_lock); | |
80 | } | |
81 | ||
ff51bf84 | 82 | static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev) |
fc19de38 ZB |
83 | { |
84 | struct rds_ib_connection *ic; | |
85 | unsigned long flags; | |
86 | ||
87 | spin_lock_irqsave(&rds_ibdev->spinlock, flags); | |
88 | list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node) | |
89 | rds_conn_drop(ic->conn); | |
90 | spin_unlock_irqrestore(&rds_ibdev->spinlock, flags); | |
91 | } | |
92 | ||
3e0249f9 ZB |
93 | /* |
94 | * rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references | |
95 | * from interrupt context so we push freing off into a work struct in krdsd. | |
96 | */ | |
97 | static void rds_ib_dev_free(struct work_struct *work) | |
98 | { | |
99 | struct rds_ib_ipaddr *i_ipaddr, *i_next; | |
100 | struct rds_ib_device *rds_ibdev = container_of(work, | |
101 | struct rds_ib_device, free_work); | |
102 | ||
06766513 SS |
103 | if (rds_ibdev->mr_8k_pool) |
104 | rds_ib_destroy_mr_pool(rds_ibdev->mr_8k_pool); | |
105 | if (rds_ibdev->mr_1m_pool) | |
106 | rds_ib_destroy_mr_pool(rds_ibdev->mr_1m_pool); | |
3e0249f9 ZB |
107 | if (rds_ibdev->pd) |
108 | ib_dealloc_pd(rds_ibdev->pd); | |
109 | ||
110 | list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) { | |
111 | list_del(&i_ipaddr->list); | |
112 | kfree(i_ipaddr); | |
113 | } | |
114 | ||
77cc7aee | 115 | kfree(rds_ibdev->vector_load); |
be2f76ea | 116 | |
3e0249f9 ZB |
117 | kfree(rds_ibdev); |
118 | } | |
119 | ||
120 | void rds_ib_dev_put(struct rds_ib_device *rds_ibdev) | |
121 | { | |
50d61ff7 RE |
122 | BUG_ON(refcount_read(&rds_ibdev->refcount) == 0); |
123 | if (refcount_dec_and_test(&rds_ibdev->refcount)) | |
3e0249f9 ZB |
124 | queue_work(rds_wq, &rds_ibdev->free_work); |
125 | } | |
126 | ||
ff51bf84 | 127 | static void rds_ib_add_one(struct ib_device *device) |
ec16227e AG |
128 | { |
129 | struct rds_ib_device *rds_ibdev; | |
9dff9936 | 130 | bool has_fr, has_fmr; |
ec16227e AG |
131 | |
132 | /* Only handle IB (no iWARP) devices */ | |
133 | if (device->node_type != RDMA_NODE_IB_CA) | |
134 | return; | |
135 | ||
3e0249f9 ZB |
136 | rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL, |
137 | ibdev_to_node(device)); | |
ec16227e | 138 | if (!rds_ibdev) |
0353261c | 139 | return; |
ec16227e AG |
140 | |
141 | spin_lock_init(&rds_ibdev->spinlock); | |
50d61ff7 | 142 | refcount_set(&rds_ibdev->refcount, 1); |
3e0249f9 | 143 | INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free); |
ec16227e | 144 | |
0353261c OG |
145 | rds_ibdev->max_wrs = device->attrs.max_qp_wr; |
146 | rds_ibdev->max_sge = min(device->attrs.max_sge, RDS_IB_MAX_SGE); | |
ec16227e | 147 | |
9dff9936 AR |
148 | has_fr = (device->attrs.device_cap_flags & |
149 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
150 | has_fmr = (device->alloc_fmr && device->dealloc_fmr && | |
151 | device->map_phys_fmr && device->unmap_fmr); | |
152 | rds_ibdev->use_fastreg = (has_fr && !has_fmr); | |
2cb2912d | 153 | |
0353261c | 154 | rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32; |
f6df683f | 155 | rds_ibdev->max_1m_mrs = device->attrs.max_mr ? |
0353261c | 156 | min_t(unsigned int, (device->attrs.max_mr / 2), |
f6df683f | 157 | rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size; |
06766513 | 158 | |
f6df683f | 159 | rds_ibdev->max_8k_mrs = device->attrs.max_mr ? |
0353261c | 160 | min_t(unsigned int, ((device->attrs.max_mr / 2) * RDS_MR_8K_SCALE), |
f6df683f | 161 | rds_ib_mr_8k_pool_size) : rds_ib_mr_8k_pool_size; |
ec16227e | 162 | |
0353261c OG |
163 | rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom; |
164 | rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom; | |
40589e74 | 165 | |
6396bb22 KC |
166 | rds_ibdev->vector_load = kcalloc(device->num_comp_vectors, |
167 | sizeof(int), | |
be2f76ea SS |
168 | GFP_KERNEL); |
169 | if (!rds_ibdev->vector_load) { | |
170 | pr_err("RDS/IB: %s failed to allocate vector memory\n", | |
171 | __func__); | |
172 | goto put_dev; | |
173 | } | |
174 | ||
ec16227e | 175 | rds_ibdev->dev = device; |
ed082d36 | 176 | rds_ibdev->pd = ib_alloc_pd(device, 0); |
3e0249f9 ZB |
177 | if (IS_ERR(rds_ibdev->pd)) { |
178 | rds_ibdev->pd = NULL; | |
179 | goto put_dev; | |
180 | } | |
ec16227e | 181 | |
06766513 SS |
182 | rds_ibdev->mr_1m_pool = |
183 | rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL); | |
184 | if (IS_ERR(rds_ibdev->mr_1m_pool)) { | |
185 | rds_ibdev->mr_1m_pool = NULL; | |
3e0249f9 | 186 | goto put_dev; |
ec16227e AG |
187 | } |
188 | ||
06766513 SS |
189 | rds_ibdev->mr_8k_pool = |
190 | rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL); | |
191 | if (IS_ERR(rds_ibdev->mr_8k_pool)) { | |
192 | rds_ibdev->mr_8k_pool = NULL; | |
193 | goto put_dev; | |
194 | } | |
195 | ||
f6df683f | 196 | rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, fmr_max_remaps = %d, max_1m_mrs = %d, max_8k_mrs = %d\n", |
0353261c | 197 | device->attrs.max_fmr, rds_ibdev->max_wrs, rds_ibdev->max_sge, |
f6df683f | 198 | rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs, |
199 | rds_ibdev->max_8k_mrs); | |
06766513 | 200 | |
2cb2912d | 201 | pr_info("RDS/IB: %s: %s supported and preferred\n", |
202 | device->name, | |
203 | rds_ibdev->use_fastreg ? "FRMR" : "FMR"); | |
204 | ||
ec16227e AG |
205 | INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); |
206 | INIT_LIST_HEAD(&rds_ibdev->conn_list); | |
ea819867 ZB |
207 | |
208 | down_write(&rds_ib_devices_lock); | |
209 | list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices); | |
210 | up_write(&rds_ib_devices_lock); | |
50d61ff7 | 211 | refcount_inc(&rds_ibdev->refcount); |
ec16227e AG |
212 | |
213 | ib_set_client_data(device, &rds_ib_client, rds_ibdev); | |
50d61ff7 | 214 | refcount_inc(&rds_ibdev->refcount); |
ec16227e | 215 | |
fc19de38 ZB |
216 | rds_ib_nodev_connect(); |
217 | ||
3e0249f9 ZB |
218 | put_dev: |
219 | rds_ib_dev_put(rds_ibdev); | |
ec16227e AG |
220 | } |
221 | ||
3e0249f9 ZB |
222 | /* |
223 | * New connections use this to find the device to associate with the | |
224 | * connection. It's not in the fast path so we're not concerned about the | |
225 | * performance of the IB call. (As of this writing, it uses an interrupt | |
226 | * blocking spinlock to serialize walking a per-device list of all registered | |
227 | * clients.) | |
228 | * | |
229 | * RCU is used to handle incoming connections racing with device teardown. | |
230 | * Rather than use a lock to serialize removal from the client_data and | |
231 | * getting a new reference, we use an RCU grace period. The destruction | |
232 | * path removes the device from client_data and then waits for all RCU | |
233 | * readers to finish. | |
234 | * | |
235 | * A new connection can get NULL from this if its arriving on a | |
236 | * device that is in the process of being removed. | |
237 | */ | |
238 | struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device) | |
239 | { | |
240 | struct rds_ib_device *rds_ibdev; | |
241 | ||
242 | rcu_read_lock(); | |
243 | rds_ibdev = ib_get_client_data(device, &rds_ib_client); | |
244 | if (rds_ibdev) | |
50d61ff7 | 245 | refcount_inc(&rds_ibdev->refcount); |
3e0249f9 ZB |
246 | rcu_read_unlock(); |
247 | return rds_ibdev; | |
248 | } | |
249 | ||
250 | /* | |
251 | * The IB stack is letting us know that a device is going away. This can | |
252 | * happen if the underlying HCA driver is removed or if PCI hotplug is removing | |
253 | * the pci function, for example. | |
254 | * | |
255 | * This can be called at any time and can be racing with any other RDS path. | |
256 | */ | |
7c1eb45a | 257 | static void rds_ib_remove_one(struct ib_device *device, void *client_data) |
ec16227e | 258 | { |
7c1eb45a | 259 | struct rds_ib_device *rds_ibdev = client_data; |
ec16227e | 260 | |
ec16227e AG |
261 | if (!rds_ibdev) |
262 | return; | |
263 | ||
fc19de38 | 264 | rds_ib_dev_shutdown(rds_ibdev); |
ec16227e | 265 | |
ea819867 ZB |
266 | /* stop connection attempts from getting a reference to this device. */ |
267 | ib_set_client_data(device, &rds_ib_client, NULL); | |
268 | ||
269 | down_write(&rds_ib_devices_lock); | |
270 | list_del_rcu(&rds_ibdev->list); | |
271 | up_write(&rds_ib_devices_lock); | |
272 | ||
3e0249f9 | 273 | /* |
ea819867 ZB |
274 | * This synchronize rcu is waiting for readers of both the ib |
275 | * client data and the devices list to finish before we drop | |
276 | * both of those references. | |
3e0249f9 | 277 | */ |
3e0249f9 ZB |
278 | synchronize_rcu(); |
279 | rds_ib_dev_put(rds_ibdev); | |
3e0249f9 | 280 | rds_ib_dev_put(rds_ibdev); |
ec16227e AG |
281 | } |
282 | ||
283 | struct ib_client rds_ib_client = { | |
284 | .name = "rds_ib", | |
285 | .add = rds_ib_add_one, | |
286 | .remove = rds_ib_remove_one | |
287 | }; | |
288 | ||
289 | static int rds_ib_conn_info_visitor(struct rds_connection *conn, | |
290 | void *buffer) | |
291 | { | |
292 | struct rds_info_rdma_connection *iinfo = buffer; | |
293 | struct rds_ib_connection *ic; | |
294 | ||
295 | /* We will only ever look at IB transports */ | |
296 | if (conn->c_trans != &rds_ib_transport) | |
297 | return 0; | |
298 | ||
299 | iinfo->src_addr = conn->c_laddr; | |
300 | iinfo->dst_addr = conn->c_faddr; | |
301 | ||
302 | memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid)); | |
303 | memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid)); | |
304 | if (rds_conn_state(conn) == RDS_CONN_UP) { | |
305 | struct rds_ib_device *rds_ibdev; | |
ec16227e AG |
306 | |
307 | ic = conn->c_transport_data; | |
ec16227e | 308 | |
a2e812ea PP |
309 | rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo->src_gid, |
310 | (union ib_gid *)&iinfo->dst_gid); | |
ec16227e | 311 | |
3e0249f9 | 312 | rds_ibdev = ic->rds_ibdev; |
ec16227e AG |
313 | iinfo->max_send_wr = ic->i_send_ring.w_nr; |
314 | iinfo->max_recv_wr = ic->i_recv_ring.w_nr; | |
315 | iinfo->max_send_sge = rds_ibdev->max_sge; | |
316 | rds_ib_get_mr_info(rds_ibdev, iinfo); | |
317 | } | |
318 | return 1; | |
319 | } | |
320 | ||
321 | static void rds_ib_ic_info(struct socket *sock, unsigned int len, | |
322 | struct rds_info_iterator *iter, | |
323 | struct rds_info_lengths *lens) | |
324 | { | |
f1cb9d68 SM |
325 | u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8]; |
326 | ||
ec16227e AG |
327 | rds_for_each_conn_info(sock, len, iter, lens, |
328 | rds_ib_conn_info_visitor, | |
f1cb9d68 | 329 | buffer, |
ec16227e AG |
330 | sizeof(struct rds_info_rdma_connection)); |
331 | } | |
332 | ||
333 | ||
334 | /* | |
335 | * Early RDS/IB was built to only bind to an address if there is an IPoIB | |
336 | * device with that address set. | |
337 | * | |
338 | * If it were me, I'd advocate for something more flexible. Sending and | |
339 | * receiving should be device-agnostic. Transports would try and maintain | |
340 | * connections between peers who have messages queued. Userspace would be | |
341 | * allowed to influence which paths have priority. We could call userspace | |
342 | * asserting this policy "routing". | |
343 | */ | |
d5a8ac28 | 344 | static int rds_ib_laddr_check(struct net *net, __be32 addr) |
ec16227e AG |
345 | { |
346 | int ret; | |
347 | struct rdma_cm_id *cm_id; | |
348 | struct sockaddr_in sin; | |
349 | ||
350 | /* Create a CMA ID and try to bind it. This catches both | |
351 | * IB and iWARP capable NICs. | |
352 | */ | |
2c0aa086 GL |
353 | cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler, |
354 | NULL, RDMA_PS_TCP, IB_QPT_RC); | |
94713bab DC |
355 | if (IS_ERR(cm_id)) |
356 | return PTR_ERR(cm_id); | |
ec16227e AG |
357 | |
358 | memset(&sin, 0, sizeof(sin)); | |
359 | sin.sin_family = AF_INET; | |
360 | sin.sin_addr.s_addr = addr; | |
361 | ||
362 | /* rdma_bind_addr will only succeed for IB & iWARP devices */ | |
363 | ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin); | |
364 | /* due to this, we will claim to support iWARP devices unless we | |
365 | check node_type. */ | |
c2349758 SL |
366 | if (ret || !cm_id->device || |
367 | cm_id->device->node_type != RDMA_NODE_IB_CA) | |
ec16227e AG |
368 | ret = -EADDRNOTAVAIL; |
369 | ||
370 | rdsdebug("addr %pI4 ret %d node type %d\n", | |
371 | &addr, ret, | |
372 | cm_id->device ? cm_id->device->node_type : -1); | |
373 | ||
374 | rdma_destroy_id(cm_id); | |
375 | ||
376 | return ret; | |
377 | } | |
378 | ||
24fa163a ZB |
379 | static void rds_ib_unregister_client(void) |
380 | { | |
381 | ib_unregister_client(&rds_ib_client); | |
382 | /* wait for rds_ib_dev_free() to complete */ | |
383 | flush_workqueue(rds_wq); | |
384 | } | |
385 | ||
ebeeb1ad SV |
386 | static void rds_ib_set_unloading(void) |
387 | { | |
388 | atomic_set(&rds_ib_unloading, 1); | |
389 | } | |
390 | ||
391 | static bool rds_ib_is_unloading(struct rds_connection *conn) | |
392 | { | |
393 | struct rds_conn_path *cp = &conn->c_path[0]; | |
394 | ||
395 | return (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags) || | |
396 | atomic_read(&rds_ib_unloading) != 0); | |
397 | } | |
398 | ||
ec16227e AG |
399 | void rds_ib_exit(void) |
400 | { | |
ebeeb1ad SV |
401 | rds_ib_set_unloading(); |
402 | synchronize_rcu(); | |
ec16227e | 403 | rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info); |
24fa163a | 404 | rds_ib_unregister_client(); |
8aeb1ba6 | 405 | rds_ib_destroy_nodev_conns(); |
ec16227e AG |
406 | rds_ib_sysctl_exit(); |
407 | rds_ib_recv_exit(); | |
408 | rds_trans_unregister(&rds_ib_transport); | |
f6df683f | 409 | rds_ib_mr_exit(); |
ec16227e AG |
410 | } |
411 | ||
412 | struct rds_transport rds_ib_transport = { | |
413 | .laddr_check = rds_ib_laddr_check, | |
226f7a7d | 414 | .xmit_path_complete = rds_ib_xmit_path_complete, |
ec16227e | 415 | .xmit = rds_ib_xmit, |
ec16227e | 416 | .xmit_rdma = rds_ib_xmit_rdma, |
15133f6e | 417 | .xmit_atomic = rds_ib_xmit_atomic, |
2da43c4a | 418 | .recv_path = rds_ib_recv_path, |
ec16227e AG |
419 | .conn_alloc = rds_ib_conn_alloc, |
420 | .conn_free = rds_ib_conn_free, | |
b04e8554 | 421 | .conn_path_connect = rds_ib_conn_path_connect, |
226f7a7d | 422 | .conn_path_shutdown = rds_ib_conn_path_shutdown, |
ec16227e | 423 | .inc_copy_to_user = rds_ib_inc_copy_to_user, |
ec16227e AG |
424 | .inc_free = rds_ib_inc_free, |
425 | .cm_initiate_connect = rds_ib_cm_initiate_connect, | |
426 | .cm_handle_connect = rds_ib_cm_handle_connect, | |
427 | .cm_connect_complete = rds_ib_cm_connect_complete, | |
428 | .stats_info_copy = rds_ib_stats_info_copy, | |
429 | .exit = rds_ib_exit, | |
430 | .get_mr = rds_ib_get_mr, | |
431 | .sync_mr = rds_ib_sync_mr, | |
432 | .free_mr = rds_ib_free_mr, | |
433 | .flush_mrs = rds_ib_flush_mrs, | |
434 | .t_owner = THIS_MODULE, | |
435 | .t_name = "infiniband", | |
ebeeb1ad | 436 | .t_unloading = rds_ib_is_unloading, |
335776bd | 437 | .t_type = RDS_TRANS_IB |
ec16227e AG |
438 | }; |
439 | ||
ef87b7ea | 440 | int rds_ib_init(void) |
ec16227e AG |
441 | { |
442 | int ret; | |
443 | ||
444 | INIT_LIST_HEAD(&rds_ib_devices); | |
445 | ||
f6df683f | 446 | ret = rds_ib_mr_init(); |
515e079d | 447 | if (ret) |
c534a107 | 448 | goto out; |
515e079d | 449 | |
ad1d7dc0 | 450 | ret = ib_register_client(&rds_ib_client); |
451 | if (ret) | |
f6df683f | 452 | goto out_mr_exit; |
ad1d7dc0 | 453 | |
ec16227e AG |
454 | ret = rds_ib_sysctl_init(); |
455 | if (ret) | |
456 | goto out_ibreg; | |
457 | ||
458 | ret = rds_ib_recv_init(); | |
459 | if (ret) | |
460 | goto out_sysctl; | |
461 | ||
a8d63a53 | 462 | rds_trans_register(&rds_ib_transport); |
ec16227e AG |
463 | |
464 | rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info); | |
465 | ||
466 | goto out; | |
467 | ||
ec16227e AG |
468 | out_sysctl: |
469 | rds_ib_sysctl_exit(); | |
470 | out_ibreg: | |
24fa163a | 471 | rds_ib_unregister_client(); |
f6df683f | 472 | out_mr_exit: |
473 | rds_ib_mr_exit(); | |
ec16227e AG |
474 | out: |
475 | return ret; | |
476 | } | |
477 | ||
478 | MODULE_LICENSE("GPL"); | |
479 |