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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
Roland Dreier2a1d9b72005-08-10 23:03:10 -07003 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
34
35#include "ipoib.h"
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/module.h>
38
39#include <linux/init.h>
40#include <linux/slab.h>
Shirley Ma0f485252006-04-10 09:43:58 -070041#include <linux/kernel.h>
Roland Dreier10313cb2008-03-12 07:51:03 -070042#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44#include <linux/if_arp.h> /* For ARPHRD_xxx */
45
46#include <linux/ip.h>
47#include <linux/in.h>
48
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020049#include <net/dst.h>
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051MODULE_AUTHOR("Roland Dreier");
52MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
53MODULE_LICENSE("Dual BSD/GPL");
54
Shirley Ma0f485252006-04-10 09:43:58 -070055int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
56int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
57
58module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
59MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
60module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
61MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
64int ipoib_debug_level;
65
66module_param_named(debug_level, ipoib_debug_level, int, 0644);
67MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
68#endif
69
Roland Dreier1732b0e2005-11-07 10:33:11 -080070struct ipoib_path_iter {
71 struct net_device *dev;
72 struct ipoib_path path;
73};
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075static const u8 ipv4_bcast_addr[] = {
76 0x00, 0xff, 0xff, 0xff,
77 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
79};
80
81struct workqueue_struct *ipoib_workqueue;
82
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -070083struct ib_sa_client ipoib_sa_client;
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static void ipoib_add_one(struct ib_device *device);
86static void ipoib_remove_one(struct ib_device *device);
87
88static struct ib_client ipoib_client = {
89 .name = "ipoib",
90 .add = ipoib_add_one,
91 .remove = ipoib_remove_one
92};
93
94int ipoib_open(struct net_device *dev)
95{
96 struct ipoib_dev_priv *priv = netdev_priv(dev);
97
98 ipoib_dbg(priv, "bringing up interface\n");
99
Yossi Etigine028cc52009-04-20 13:58:08 -0700100 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102 if (ipoib_pkey_dev_delay_open(dev))
103 return 0;
104
Roland Dreierb8a1b1c2009-01-14 14:55:41 -0800105 if (ipoib_ib_dev_open(dev))
106 goto err_disable;
Yossi Etiginfe25c562008-11-12 10:24:36 -0800107
Roland Dreierb8a1b1c2009-01-14 14:55:41 -0800108 if (ipoib_ib_dev_up(dev))
109 goto err_stop;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
112 struct ipoib_dev_priv *cpriv;
113
114 /* Bring up any child interfaces too */
Ingo Molnar95ed6442006-01-13 14:51:39 -0800115 mutex_lock(&priv->vlan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 list_for_each_entry(cpriv, &priv->child_intfs, list) {
117 int flags;
118
119 flags = cpriv->dev->flags;
120 if (flags & IFF_UP)
121 continue;
122
123 dev_change_flags(cpriv->dev, flags | IFF_UP);
124 }
Ingo Molnar95ed6442006-01-13 14:51:39 -0800125 mutex_unlock(&priv->vlan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 }
127
128 netif_start_queue(dev);
129
130 return 0;
Roland Dreierb8a1b1c2009-01-14 14:55:41 -0800131
132err_stop:
133 ipoib_ib_dev_stop(dev, 1);
134
135err_disable:
Roland Dreierb8a1b1c2009-01-14 14:55:41 -0800136 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
137
138 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139}
140
141static int ipoib_stop(struct net_device *dev)
142{
143 struct ipoib_dev_priv *priv = netdev_priv(dev);
144
145 ipoib_dbg(priv, "stopping interface\n");
146
147 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
148
149 netif_stop_queue(dev);
150
Roland Dreiera77a57a2008-08-19 15:01:32 -0700151 ipoib_ib_dev_down(dev, 0);
152 ipoib_ib_dev_stop(dev, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
155 struct ipoib_dev_priv *cpriv;
156
157 /* Bring down any child interfaces too */
Ingo Molnar95ed6442006-01-13 14:51:39 -0800158 mutex_lock(&priv->vlan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 list_for_each_entry(cpriv, &priv->child_intfs, list) {
160 int flags;
161
162 flags = cpriv->dev->flags;
163 if (!(flags & IFF_UP))
164 continue;
165
166 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
167 }
Ingo Molnar95ed6442006-01-13 14:51:39 -0800168 mutex_unlock(&priv->vlan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 }
170
171 return 0;
172}
173
David S. Miller9ca36f72011-11-16 18:05:50 -0500174static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features)
Michał Mirosław3d96c742011-04-19 00:43:20 +0000175{
176 struct ipoib_dev_priv *priv = netdev_priv(dev);
177
178 if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags))
179 features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
180
181 return features;
182}
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
185{
186 struct ipoib_dev_priv *priv = netdev_priv(dev);
187
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200188 /* dev->mtu > 2K ==> connected mode */
Pradeep Satyanarayana586a6932007-12-21 13:08:23 -0800189 if (ipoib_cm_admin_enabled(dev)) {
190 if (new_mtu > ipoib_cm_max_mtu(dev))
191 return -EINVAL;
192
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200193 if (new_mtu > priv->mcast_mtu)
194 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
195 priv->mcast_mtu);
Pradeep Satyanarayana586a6932007-12-21 13:08:23 -0800196
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200197 dev->mtu = new_mtu;
198 return 0;
199 }
200
Shirley Mabc7b3a32008-04-23 11:55:45 -0700201 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 return -EINVAL;
203
204 priv->admin_mtu = new_mtu;
205
206 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
207
208 return 0;
209}
210
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300211static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 struct ipoib_dev_priv *priv = netdev_priv(dev);
214 struct rb_node *n = priv->path_tree.rb_node;
215 struct ipoib_path *path;
216 int ret;
217
218 while (n) {
219 path = rb_entry(n, struct ipoib_path, rb_node);
220
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300221 ret = memcmp(gid, path->pathrec.dgid.raw,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 sizeof (union ib_gid));
223
224 if (ret < 0)
225 n = n->rb_left;
226 else if (ret > 0)
227 n = n->rb_right;
228 else
229 return path;
230 }
231
232 return NULL;
233}
234
235static int __path_add(struct net_device *dev, struct ipoib_path *path)
236{
237 struct ipoib_dev_priv *priv = netdev_priv(dev);
238 struct rb_node **n = &priv->path_tree.rb_node;
239 struct rb_node *pn = NULL;
240 struct ipoib_path *tpath;
241 int ret;
242
243 while (*n) {
244 pn = *n;
245 tpath = rb_entry(pn, struct ipoib_path, rb_node);
246
247 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
248 sizeof (union ib_gid));
249 if (ret < 0)
250 n = &pn->rb_left;
251 else if (ret > 0)
252 n = &pn->rb_right;
253 else
254 return -EEXIST;
255 }
256
257 rb_link_node(&path->rb_node, pn, n);
258 rb_insert_color(&path->rb_node, &priv->path_tree);
259
260 list_add_tail(&path->list, &priv->path_list);
261
262 return 0;
263}
264
265static void path_free(struct net_device *dev, struct ipoib_path *path)
266{
267 struct ipoib_dev_priv *priv = netdev_priv(dev);
268 struct ipoib_neigh *neigh, *tn;
269 struct sk_buff *skb;
270 unsigned long flags;
271
272 while ((skb = __skb_dequeue(&path->queue)))
273 dev_kfree_skb_irq(skb);
274
275 spin_lock_irqsave(&priv->lock, flags);
276
277 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
278 /*
279 * It's safe to call ipoib_put_ah() inside priv->lock
280 * here, because we know that path->ah will always
281 * hold one more reference, so ipoib_put_ah() will
282 * never do more than decrement the ref count.
283 */
284 if (neigh->ah)
285 ipoib_put_ah(neigh->ah);
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300286
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200287 ipoib_neigh_free(dev, neigh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 }
289
290 spin_unlock_irqrestore(&priv->lock, flags);
291
292 if (path->ah)
293 ipoib_put_ah(path->ah);
294
295 kfree(path);
296}
297
Roland Dreier1732b0e2005-11-07 10:33:11 -0800298#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
299
300struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
301{
302 struct ipoib_path_iter *iter;
303
304 iter = kmalloc(sizeof *iter, GFP_KERNEL);
305 if (!iter)
306 return NULL;
307
308 iter->dev = dev;
309 memset(iter->path.pathrec.dgid.raw, 0, 16);
310
311 if (ipoib_path_iter_next(iter)) {
312 kfree(iter);
313 return NULL;
314 }
315
316 return iter;
317}
318
319int ipoib_path_iter_next(struct ipoib_path_iter *iter)
320{
321 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
322 struct rb_node *n;
323 struct ipoib_path *path;
324 int ret = 1;
325
326 spin_lock_irq(&priv->lock);
327
328 n = rb_first(&priv->path_tree);
329
330 while (n) {
331 path = rb_entry(n, struct ipoib_path, rb_node);
332
333 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
334 sizeof (union ib_gid)) < 0) {
335 iter->path = *path;
336 ret = 0;
337 break;
338 }
339
340 n = rb_next(n);
341 }
342
343 spin_unlock_irq(&priv->lock);
344
345 return ret;
346}
347
348void ipoib_path_iter_read(struct ipoib_path_iter *iter,
349 struct ipoib_path *path)
350{
351 *path = iter->path;
352}
353
354#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
355
Moni Shouaee1e2c82008-07-14 23:48:49 -0700356void ipoib_mark_paths_invalid(struct net_device *dev)
357{
358 struct ipoib_dev_priv *priv = netdev_priv(dev);
359 struct ipoib_path *path, *tp;
360
361 spin_lock_irq(&priv->lock);
362
363 list_for_each_entry_safe(path, tp, &priv->path_list, list) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700364 ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n",
Moni Shouaee1e2c82008-07-14 23:48:49 -0700365 be16_to_cpu(path->pathrec.dlid),
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700366 path->pathrec.dgid.raw);
Moni Shouaee1e2c82008-07-14 23:48:49 -0700367 path->valid = 0;
368 }
369
370 spin_unlock_irq(&priv->lock);
371}
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373void ipoib_flush_paths(struct net_device *dev)
374{
375 struct ipoib_dev_priv *priv = netdev_priv(dev);
376 struct ipoib_path *path, *tp;
377 LIST_HEAD(remove_list);
Roland Dreier943c2462008-09-30 10:36:21 -0700378 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Roland Dreier943c2462008-09-30 10:36:21 -0700380 netif_tx_lock_bh(dev);
381 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Robert P. J. Day157de222008-04-16 21:09:26 -0700383 list_splice_init(&priv->path_list, &remove_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 list_for_each_entry(path, &remove_list, list)
386 rb_erase(&path->rb_node, &priv->path_tree);
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 list_for_each_entry_safe(path, tp, &remove_list, list) {
389 if (path->query)
390 ib_sa_cancel_query(path->query_id, path->query);
Roland Dreier943c2462008-09-30 10:36:21 -0700391 spin_unlock_irqrestore(&priv->lock, flags);
392 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 wait_for_completion(&path->done);
394 path_free(dev, path);
Roland Dreier943c2462008-09-30 10:36:21 -0700395 netif_tx_lock_bh(dev);
396 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 }
Roland Dreier943c2462008-09-30 10:36:21 -0700398
399 spin_unlock_irqrestore(&priv->lock, flags);
400 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401}
402
403static void path_rec_completion(int status,
404 struct ib_sa_path_rec *pathrec,
405 void *path_ptr)
406{
407 struct ipoib_path *path = path_ptr;
408 struct net_device *dev = path->dev;
409 struct ipoib_dev_priv *priv = netdev_priv(dev);
410 struct ipoib_ah *ah = NULL;
Roland Dreierc9da4ba2008-09-25 15:26:15 -0700411 struct ipoib_ah *old_ah = NULL;
Michael S. Tsirkind04d01b2007-03-22 14:40:16 -0700412 struct ipoib_neigh *neigh, *tn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 struct sk_buff_head skqueue;
414 struct sk_buff *skb;
415 unsigned long flags;
416
Roland Dreier843613b2007-02-26 12:57:08 -0800417 if (!status)
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700418 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700419 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 else
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700421 ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700422 status, path->pathrec.dgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 skb_queue_head_init(&skqueue);
425
426 if (!status) {
Sean Hefty46f1b3d2007-04-05 11:50:11 -0700427 struct ib_ah_attr av;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Sean Hefty46f1b3d2007-04-05 11:50:11 -0700429 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
430 ah = ipoib_create_ah(dev, priv->pd, &av);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 }
432
433 spin_lock_irqsave(&priv->lock, flags);
434
Mike Marciniszyn38743972011-11-21 08:43:54 -0500435 if (!IS_ERR_OR_NULL(ah)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 path->pathrec = *pathrec;
437
Roland Dreierc9da4ba2008-09-25 15:26:15 -0700438 old_ah = path->ah;
439 path->ah = ah;
440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
442 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
443
444 while ((skb = __skb_dequeue(&path->queue)))
445 __skb_queue_tail(&skqueue, skb);
446
Michael S. Tsirkind04d01b2007-03-22 14:40:16 -0700447 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
Moni Shouaee1e2c82008-07-14 23:48:49 -0700448 if (neigh->ah) {
449 WARN_ON(neigh->ah != old_ah);
450 /*
451 * Dropping the ah reference inside
452 * priv->lock is safe here, because we
453 * will hold one more reference from
454 * the original value of path->ah (ie
455 * old_ah).
456 */
457 ipoib_put_ah(neigh->ah);
458 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 kref_get(&path->ah->ref);
460 neigh->ah = path->ah;
Michael S. Tsirkin8a7f7522006-07-19 17:44:37 +0300461 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
462 sizeof(union ib_gid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200464 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
465 if (!ipoib_cm_get(neigh))
466 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
467 path,
468 neigh));
469 if (!ipoib_cm_get(neigh)) {
470 list_del(&neigh->list);
471 if (neigh->ah)
472 ipoib_put_ah(neigh->ah);
473 ipoib_neigh_free(dev, neigh);
474 continue;
475 }
476 }
477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 while ((skb = __skb_dequeue(&neigh->queue)))
479 __skb_queue_tail(&skqueue, skb);
480 }
Moni Shouaee1e2c82008-07-14 23:48:49 -0700481 path->valid = 1;
Roland Dreier5872a9f2005-11-29 10:13:54 -0800482 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Roland Dreier5872a9f2005-11-29 10:13:54 -0800484 path->query = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 complete(&path->done);
486
487 spin_unlock_irqrestore(&priv->lock, flags);
488
Moni Shouaee1e2c82008-07-14 23:48:49 -0700489 if (old_ah)
490 ipoib_put_ah(old_ah);
491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 while ((skb = __skb_dequeue(&skqueue))) {
493 skb->dev = dev;
494 if (dev_queue_xmit(skb))
495 ipoib_warn(priv, "dev_queue_xmit failed "
496 "to requeue packet\n");
497 }
498}
499
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300500static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501{
502 struct ipoib_dev_priv *priv = netdev_priv(dev);
503 struct ipoib_path *path;
504
Jack Morgenstein1401b532007-11-26 10:41:19 +0200505 if (!priv->broadcast)
506 return NULL;
507
Roland Dreier21a38482005-11-02 10:07:59 -0800508 path = kzalloc(sizeof *path, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (!path)
510 return NULL;
511
Roland Dreier21a38482005-11-02 10:07:59 -0800512 path->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 skb_queue_head_init(&path->queue);
515
516 INIT_LIST_HEAD(&path->neigh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300518 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
Roland Dreier2337f802007-10-23 19:57:54 -0700519 path->pathrec.sgid = priv->local_gid;
520 path->pathrec.pkey = cpu_to_be16(priv->pkey);
Sean Hefty81668832007-08-02 12:21:31 -0700521 path->pathrec.numb_path = 1;
522 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
524 return path;
525}
526
527static int path_rec_start(struct net_device *dev,
528 struct ipoib_path *path)
529{
530 struct ipoib_dev_priv *priv = netdev_priv(dev);
531
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700532 ipoib_dbg(priv, "Start path record lookup for %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700533 path->pathrec.dgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Roland Dreier65c7edd2005-11-28 21:20:34 -0800535 init_completion(&path->done);
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 path->query_id =
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -0700538 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 &path->pathrec,
540 IB_SA_PATH_REC_DGID |
541 IB_SA_PATH_REC_SGID |
542 IB_SA_PATH_REC_NUMB_PATH |
Sean Hefty81668832007-08-02 12:21:31 -0700543 IB_SA_PATH_REC_TRAFFIC_CLASS |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 IB_SA_PATH_REC_PKEY,
545 1000, GFP_ATOMIC,
546 path_rec_completion,
547 path, &path->query);
548 if (path->query_id < 0) {
Or Gerlitz01b3fc82008-07-22 14:18:34 -0700549 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 path->query = NULL;
Yossi Etigin93a3ab92008-11-12 10:24:38 -0800551 complete(&path->done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 return path->query_id;
553 }
554
555 return 0;
556}
557
Eric Dumazet580da352011-11-29 22:31:23 +0100558/* called with rcu_read_lock */
David Miller17e6abe2011-12-02 16:52:44 +0000559static void neigh_add_path(struct sk_buff *skb, struct neighbour *n, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560{
561 struct ipoib_dev_priv *priv = netdev_priv(dev);
562 struct ipoib_path *path;
563 struct ipoib_neigh *neigh;
Roland Dreier943c2462008-09-30 10:36:21 -0700564 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
David S. Miller69cce1d2011-07-17 23:09:49 -0700566 neigh = ipoib_neigh_alloc(n, skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 if (!neigh) {
Roland Dreierde903512007-09-28 15:33:51 -0700568 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 dev_kfree_skb_any(skb);
570 return;
571 }
572
Roland Dreier943c2462008-09-30 10:36:21 -0700573 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
David S. Miller69cce1d2011-07-17 23:09:49 -0700575 path = __path_find(dev, n->ha + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 if (!path) {
David S. Miller69cce1d2011-07-17 23:09:49 -0700577 path = path_rec_create(dev, n->ha + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (!path)
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300579 goto err_path;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
581 __path_add(dev, path);
582 }
583
584 list_add_tail(&neigh->list, &path->neigh_list);
585
Michael S. Tsirkin47f7a072006-01-17 09:22:05 -0800586 if (path->ah) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 kref_get(&path->ah->ref);
588 neigh->ah = path->ah;
Michael S. Tsirkin8a7f7522006-07-19 17:44:37 +0300589 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
590 sizeof(union ib_gid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200592 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
593 if (!ipoib_cm_get(neigh))
594 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
595 if (!ipoib_cm_get(neigh)) {
596 list_del(&neigh->list);
597 if (neigh->ah)
598 ipoib_put_ah(neigh->ah);
599 ipoib_neigh_free(dev, neigh);
600 goto err_drop;
601 }
602 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
603 __skb_queue_tail(&neigh->queue, skb);
604 else {
605 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
606 skb_queue_len(&neigh->queue));
607 goto err_drop;
608 }
Roland Dreier721d67c2009-09-05 20:23:40 -0700609 } else {
610 spin_unlock_irqrestore(&priv->lock, flags);
David S. Miller69cce1d2011-07-17 23:09:49 -0700611 ipoib_send(dev, skb, path->ah, IPOIB_QPN(n->ha));
Roland Dreier721d67c2009-09-05 20:23:40 -0700612 return;
613 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 } else {
615 neigh->ah = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617 if (!path->query && path_rec_start(dev, path))
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300618 goto err_list;
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200619
620 __skb_queue_tail(&neigh->queue, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 }
622
Roland Dreier943c2462008-09-30 10:36:21 -0700623 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 return;
625
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300626err_list:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 list_del(&neigh->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300629err_path:
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200630 ipoib_neigh_free(dev, neigh);
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200631err_drop:
Roland Dreierde903512007-09-28 15:33:51 -0700632 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 dev_kfree_skb_any(skb);
634
Roland Dreier943c2462008-09-30 10:36:21 -0700635 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636}
637
Eric Dumazet580da352011-11-29 22:31:23 +0100638/* called with rcu_read_lock */
David Miller17e6abe2011-12-02 16:52:44 +0000639static void ipoib_path_lookup(struct sk_buff *skb, struct neighbour *n, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640{
641 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
642
643 /* Look up path record for unicasts */
David S. Miller69cce1d2011-07-17 23:09:49 -0700644 if (n->ha[4] != 0xff) {
David Miller17e6abe2011-12-02 16:52:44 +0000645 neigh_add_path(skb, n, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 return;
647 }
648
649 /* Add in the P_Key for multicasts */
David S. Miller69cce1d2011-07-17 23:09:49 -0700650 n->ha[8] = (priv->pkey >> 8) & 0xff;
651 n->ha[9] = priv->pkey & 0xff;
652 ipoib_mcast_send(dev, n->ha + 4, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653}
654
655static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
Roland Dreier936d7de2012-02-07 14:51:21 +0000656 struct ipoib_cb *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657{
658 struct ipoib_dev_priv *priv = netdev_priv(dev);
659 struct ipoib_path *path;
Roland Dreier943c2462008-09-30 10:36:21 -0700660 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Roland Dreier943c2462008-09-30 10:36:21 -0700662 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Roland Dreier936d7de2012-02-07 14:51:21 +0000664 path = __path_find(dev, cb->hwaddr + 4);
Moni Shouaee1e2c82008-07-14 23:48:49 -0700665 if (!path || !path->valid) {
Jack Morgenstein71d98b42009-02-17 14:51:47 -0800666 int new_path = 0;
667
668 if (!path) {
Roland Dreier936d7de2012-02-07 14:51:21 +0000669 path = path_rec_create(dev, cb->hwaddr + 4);
Jack Morgenstein71d98b42009-02-17 14:51:47 -0800670 new_path = 1;
671 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 if (path) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 __skb_queue_tail(&path->queue, skb);
674
Yossi Etiginff79ae82008-11-12 10:24:39 -0800675 if (!path->query && path_rec_start(dev, path)) {
Roland Dreier943c2462008-09-30 10:36:21 -0700676 spin_unlock_irqrestore(&priv->lock, flags);
Jack Morgenstein71d98b42009-02-17 14:51:47 -0800677 if (new_path)
678 path_free(dev, path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 return;
680 } else
681 __path_add(dev, path);
682 } else {
Roland Dreierde903512007-09-28 15:33:51 -0700683 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 dev_kfree_skb_any(skb);
685 }
686
Roland Dreier943c2462008-09-30 10:36:21 -0700687 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 return;
689 }
690
Michael S. Tsirkin47f7a072006-01-17 09:22:05 -0800691 if (path->ah) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
693 be16_to_cpu(path->pathrec.dlid));
694
Roland Dreier721d67c2009-09-05 20:23:40 -0700695 spin_unlock_irqrestore(&priv->lock, flags);
Roland Dreier936d7de2012-02-07 14:51:21 +0000696 ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr));
Roland Dreier721d67c2009-09-05 20:23:40 -0700697 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 } else if ((path->query || !path_rec_start(dev, path)) &&
699 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 __skb_queue_tail(&path->queue, skb);
701 } else {
Roland Dreierde903512007-09-28 15:33:51 -0700702 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 dev_kfree_skb_any(skb);
704 }
705
Roland Dreier943c2462008-09-30 10:36:21 -0700706 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707}
708
709static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
710{
711 struct ipoib_dev_priv *priv = netdev_priv(dev);
712 struct ipoib_neigh *neigh;
Bernd Schubert22cfb0b2011-08-16 10:56:54 +0000713 struct neighbour *n = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 unsigned long flags;
715
Eric Dumazet580da352011-11-29 22:31:23 +0100716 rcu_read_lock();
David Miller17e6abe2011-12-02 16:52:44 +0000717 if (likely(skb_dst(skb))) {
David S. Miller178709b2012-07-02 22:00:03 -0700718 n = dst_neigh_lookup_skb(skb_dst(skb), skb);
David Miller17e6abe2011-12-02 16:52:44 +0000719 if (!n) {
720 ++dev->stats.tx_dropped;
721 dev_kfree_skb_any(skb);
722 goto unlock;
723 }
724 }
Bernd Schubert22cfb0b2011-08-16 10:56:54 +0000725 if (likely(n)) {
David S. Miller69cce1d2011-07-17 23:09:49 -0700726 if (unlikely(!*to_ipoib_neigh(n))) {
David Miller17e6abe2011-12-02 16:52:44 +0000727 ipoib_path_lookup(skb, n, dev);
Eric Dumazet580da352011-11-29 22:31:23 +0100728 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 }
730
David S. Miller69cce1d2011-07-17 23:09:49 -0700731 neigh = *to_ipoib_neigh(n);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
Yossi Etigina50df392009-01-09 14:05:11 -0800733 if (unlikely((memcmp(&neigh->dgid.raw,
David S. Miller69cce1d2011-07-17 23:09:49 -0700734 n->ha + 4,
Yossi Etigina50df392009-01-09 14:05:11 -0800735 sizeof(union ib_gid))) ||
736 (neigh->dev != dev))) {
737 spin_lock_irqsave(&priv->lock, flags);
738 /*
739 * It's safe to call ipoib_put_ah() inside
740 * priv->lock here, because we know that
741 * path->ah will always hold one more reference,
742 * so ipoib_put_ah() will never do more than
743 * decrement the ref count.
744 */
745 if (neigh->ah)
Michael S. Tsirkin8a7f7522006-07-19 17:44:37 +0300746 ipoib_put_ah(neigh->ah);
Yossi Etigina50df392009-01-09 14:05:11 -0800747 list_del(&neigh->list);
748 ipoib_neigh_free(dev, neigh);
749 spin_unlock_irqrestore(&priv->lock, flags);
David Miller17e6abe2011-12-02 16:52:44 +0000750 ipoib_path_lookup(skb, n, dev);
Eric Dumazet580da352011-11-29 22:31:23 +0100751 goto unlock;
Yossi Etigina50df392009-01-09 14:05:11 -0800752 }
Michael S. Tsirkin8a7f7522006-07-19 17:44:37 +0300753
Or Gerlitzbafff972008-01-17 17:03:45 +0200754 if (ipoib_cm_get(neigh)) {
755 if (ipoib_cm_up(neigh)) {
756 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
Eric Dumazet580da352011-11-29 22:31:23 +0100757 goto unlock;
Or Gerlitzbafff972008-01-17 17:03:45 +0200758 }
759 } else if (neigh->ah) {
David S. Miller69cce1d2011-07-17 23:09:49 -0700760 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(n->ha));
Eric Dumazet580da352011-11-29 22:31:23 +0100761 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 }
763
764 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
Roland Dreier943c2462008-09-30 10:36:21 -0700765 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 __skb_queue_tail(&neigh->queue, skb);
Roland Dreier943c2462008-09-30 10:36:21 -0700767 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 } else {
Roland Dreierde903512007-09-28 15:33:51 -0700769 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 dev_kfree_skb_any(skb);
771 }
772 } else {
Roland Dreier936d7de2012-02-07 14:51:21 +0000773 struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
Roland Dreier936d7de2012-02-07 14:51:21 +0000775 if (cb->hwaddr[4] == 0xff) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 /* Add in the P_Key for multicast*/
Roland Dreier936d7de2012-02-07 14:51:21 +0000777 cb->hwaddr[8] = (priv->pkey >> 8) & 0xff;
778 cb->hwaddr[9] = priv->pkey & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
Roland Dreier936d7de2012-02-07 14:51:21 +0000780 ipoib_mcast_send(dev, cb->hwaddr + 4, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 } else {
Hal Rosenstock0dca0f72005-07-28 13:17:26 -0700782 /* unicast GID -- should be ARP or RARP reply */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Hal Rosenstock0dca0f72005-07-28 13:17:26 -0700784 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
785 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700786 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n",
Eric Dumazetadf30902009-06-02 05:19:30 +0000787 skb_dst(skb) ? "neigh" : "dst",
Sean Hefty97f52eb2005-08-13 21:05:57 -0700788 be16_to_cpup((__be16 *) skb->data),
Roland Dreier936d7de2012-02-07 14:51:21 +0000789 IPOIB_QPN(cb->hwaddr),
790 cb->hwaddr + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 dev_kfree_skb_any(skb);
Roland Dreierde903512007-09-28 15:33:51 -0700792 ++dev->stats.tx_dropped;
Eric Dumazet580da352011-11-29 22:31:23 +0100793 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 }
795
Roland Dreier936d7de2012-02-07 14:51:21 +0000796 unicast_arp_send(skb, dev, cb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 }
798 }
Eric Dumazet580da352011-11-29 22:31:23 +0100799unlock:
David S. Miller178709b2012-07-02 22:00:03 -0700800 if (n)
801 neigh_release(n);
Eric Dumazet580da352011-11-29 22:31:23 +0100802 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 return NETDEV_TX_OK;
804}
805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806static void ipoib_timeout(struct net_device *dev)
807{
808 struct ipoib_dev_priv *priv = netdev_priv(dev);
809
Roland Dreier4b2d3192005-10-18 12:20:06 -0700810 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
811 jiffies_to_msecs(jiffies - dev->trans_start));
812 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
813 netif_queue_stopped(dev),
814 priv->tx_head, priv->tx_tail);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 /* XXX reset QP, etc. */
816}
817
818static int ipoib_hard_header(struct sk_buff *skb,
819 struct net_device *dev,
820 unsigned short type,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700821 const void *daddr, const void *saddr, unsigned len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822{
823 struct ipoib_header *header;
824
825 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
826
827 header->proto = htons(type);
828 header->reserved = 0;
829
830 /*
Roland Dreier936d7de2012-02-07 14:51:21 +0000831 * If we don't have a dst_entry structure, stuff the
832 * destination address into skb->cb so we can figure out where
833 * to send the packet later.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 */
Roland Dreier936d7de2012-02-07 14:51:21 +0000835 if (!skb_dst(skb)) {
836 struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
837 memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 }
839
840 return 0;
841}
842
843static void ipoib_set_mcast_list(struct net_device *dev)
844{
845 struct ipoib_dev_priv *priv = netdev_priv(dev);
846
Leonid Arsh7a343d42006-03-23 19:52:51 +0200847 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
848 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
849 return;
850 }
851
Michael S. Tsirkin1ad62a12005-08-24 14:41:51 -0700852 queue_work(ipoib_workqueue, &priv->restart_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853}
854
Alexey Kuznetsovecbb4162007-03-24 12:52:16 -0700855static void ipoib_neigh_cleanup(struct neighbour *n)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856{
857 struct ipoib_neigh *neigh;
858 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
859 unsigned long flags;
860 struct ipoib_ah *ah = NULL;
861
Moni Shoua732a2172007-10-09 19:43:36 -0700862 neigh = *to_ipoib_neigh(n);
Or Gerlitz7bc531d2008-01-29 12:57:56 +0200863 if (neigh)
Moni Shoua732a2172007-10-09 19:43:36 -0700864 priv = netdev_priv(neigh->dev);
Or Gerlitz7bc531d2008-01-29 12:57:56 +0200865 else
Moni Shoua732a2172007-10-09 19:43:36 -0700866 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 ipoib_dbg(priv,
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700868 "neigh_cleanup for %06x %pI6\n",
Michael S. Tsirkin073ae842006-11-16 10:59:12 +0200869 IPOIB_QPN(n->ha),
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700870 n->ha + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 spin_lock_irqsave(&priv->lock, flags);
873
Moni Shoua732a2172007-10-09 19:43:36 -0700874 if (neigh->ah)
875 ah = neigh->ah;
876 list_del(&neigh->list);
877 ipoib_neigh_free(n->dev, neigh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
879 spin_unlock_irqrestore(&priv->lock, flags);
880
881 if (ah)
882 ipoib_put_ah(ah);
883}
884
Moni Shoua732a2172007-10-09 19:43:36 -0700885struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
886 struct net_device *dev)
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300887{
888 struct ipoib_neigh *neigh;
889
890 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
891 if (!neigh)
892 return NULL;
893
894 neigh->neighbour = neighbour;
Moni Shoua732a2172007-10-09 19:43:36 -0700895 neigh->dev = dev;
David J. Wilder0cd4d0f2009-12-09 10:03:00 -0800896 memset(&neigh->dgid.raw, 0, sizeof (union ib_gid));
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300897 *to_ipoib_neigh(neighbour) = neigh;
Roland Dreier82b39912006-12-12 14:48:18 -0800898 skb_queue_head_init(&neigh->queue);
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200899 ipoib_cm_set(neigh, NULL);
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300900
901 return neigh;
902}
903
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200904void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300905{
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200906 struct sk_buff *skb;
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300907 *to_ipoib_neigh(neigh->neighbour) = NULL;
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200908 while ((skb = __skb_dequeue(&neigh->queue))) {
Roland Dreierde903512007-09-28 15:33:51 -0700909 ++dev->stats.tx_dropped;
Michael S. Tsirkin2745b5b2006-11-16 14:16:47 +0200910 dev_kfree_skb_any(skb);
911 }
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +0200912 if (ipoib_cm_get(neigh))
913 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
Michael S. Tsirkind2e06552006-04-04 19:59:40 +0300914 kfree(neigh);
915}
916
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
918{
Alexey Kuznetsovecbb4162007-03-24 12:52:16 -0700919 parms->neigh_cleanup = ipoib_neigh_cleanup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
921 return 0;
922}
923
924int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
925{
926 struct ipoib_dev_priv *priv = netdev_priv(dev);
927
928 /* Allocate RX/TX "rings" to hold queued skbs */
Shirley Ma0f485252006-04-10 09:43:58 -0700929 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 GFP_KERNEL);
931 if (!priv->rx_ring) {
932 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
Shirley Ma0f485252006-04-10 09:43:58 -0700933 ca->name, ipoib_recvq_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 goto out;
935 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Joe Perches948579c2010-11-05 03:07:36 +0000937 priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 if (!priv->tx_ring) {
939 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
Shirley Ma0f485252006-04-10 09:43:58 -0700940 ca->name, ipoib_sendq_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 goto out_rx_ring_cleanup;
942 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Michael S. Tsirkin1b524962007-08-16 15:36:16 +0300944 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
946 if (ipoib_ib_dev_init(dev, ca, port))
947 goto out_tx_ring_cleanup;
948
949 return 0;
950
951out_tx_ring_cleanup:
Roland Dreier10313cb2008-03-12 07:51:03 -0700952 vfree(priv->tx_ring);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954out_rx_ring_cleanup:
955 kfree(priv->rx_ring);
956
957out:
958 return -ENOMEM;
959}
960
961void ipoib_dev_cleanup(struct net_device *dev)
962{
963 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
964
Roland Dreier1732b0e2005-11-07 10:33:11 -0800965 ipoib_delete_debug_files(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967 /* Delete any child interfaces first */
968 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
969 unregister_netdev(cpriv->dev);
970 ipoib_dev_cleanup(cpriv->dev);
971 free_netdev(cpriv->dev);
972 }
973
974 ipoib_ib_dev_cleanup(dev);
975
Hal Rosenstock92a6b342005-08-13 20:50:27 -0700976 kfree(priv->rx_ring);
Roland Dreier10313cb2008-03-12 07:51:03 -0700977 vfree(priv->tx_ring);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Hal Rosenstock92a6b342005-08-13 20:50:27 -0700979 priv->rx_ring = NULL;
980 priv->tx_ring = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981}
982
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700983static const struct header_ops ipoib_header_ops = {
984 .create = ipoib_hard_header,
985};
986
Stephen Hemmingerfe8114e2009-03-20 19:35:32 +0000987static const struct net_device_ops ipoib_netdev_ops = {
988 .ndo_open = ipoib_open,
989 .ndo_stop = ipoib_stop,
990 .ndo_change_mtu = ipoib_change_mtu,
Michał Mirosław3d96c742011-04-19 00:43:20 +0000991 .ndo_fix_features = ipoib_fix_features,
Stephen Hemmingerfe8114e2009-03-20 19:35:32 +0000992 .ndo_start_xmit = ipoib_start_xmit,
993 .ndo_tx_timeout = ipoib_timeout,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000994 .ndo_set_rx_mode = ipoib_set_mcast_list,
Stephen Hemmingerfe8114e2009-03-20 19:35:32 +0000995 .ndo_neigh_setup = ipoib_neigh_setup_dev,
996};
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998static void ipoib_setup(struct net_device *dev)
999{
1000 struct ipoib_dev_priv *priv = netdev_priv(dev);
1001
Stephen Hemmingerfe8114e2009-03-20 19:35:32 +00001002 dev->netdev_ops = &ipoib_netdev_ops;
Roland Dreier2337f802007-10-23 19:57:54 -07001003 dev->header_ops = &ipoib_header_ops;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001004
Eli Cohen82c24c12008-04-16 21:09:32 -07001005 ipoib_set_ethtool_ops(dev);
1006
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001007 netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008
Roland Dreier2337f802007-10-23 19:57:54 -07001009 dev->watchdog_timeo = HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Roland Dreier2337f802007-10-23 19:57:54 -07001011 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012
Roland Dreier936d7de2012-02-07 14:51:21 +00001013 dev->hard_header_len = IPOIB_ENCAP_LEN;
Roland Dreier2337f802007-10-23 19:57:54 -07001014 dev->addr_len = INFINIBAND_ALEN;
1015 dev->type = ARPHRD_INFINIBAND;
1016 dev->tx_queue_len = ipoib_sendq_size * 2;
Eli Coheneb14032f2008-01-30 18:30:46 +02001017 dev->features = (NETIF_F_VLAN_CHALLENGED |
Eli Coheneb14032f2008-01-30 18:30:46 +02001018 NETIF_F_HIGHDMA);
Eric Dumazet86d15cd2009-05-30 23:04:46 -07001019 dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
1022
1023 netif_carrier_off(dev);
1024
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 priv->dev = dev;
1026
1027 spin_lock_init(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
Ingo Molnar95ed6442006-01-13 14:51:39 -08001029 mutex_init(&priv->vlan_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
1031 INIT_LIST_HEAD(&priv->path_list);
1032 INIT_LIST_HEAD(&priv->child_intfs);
1033 INIT_LIST_HEAD(&priv->dead_ahs);
1034 INIT_LIST_HEAD(&priv->multicast_list);
1035
Yosef Etigin26bbf132007-05-19 08:51:54 -07001036 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
David Howellsc4028952006-11-22 14:57:56 +00001037 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
Yossi Etigine8224e42008-09-16 11:57:45 -07001038 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
Moni Shouaee1e2c82008-07-14 23:48:49 -07001039 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
1040 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
1041 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
David Howellsc4028952006-11-22 14:57:56 +00001042 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
1043 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
1047{
1048 struct net_device *dev;
1049
1050 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
1051 ipoib_setup);
1052 if (!dev)
1053 return NULL;
1054
1055 return netdev_priv(dev);
1056}
1057
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001058static ssize_t show_pkey(struct device *dev,
1059 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001061 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
1063 return sprintf(buf, "0x%04x\n", priv->pkey);
1064}
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001065static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
Or Gerlitz335a64a5a2007-10-08 10:13:00 +02001067static ssize_t show_umcast(struct device *dev,
1068 struct device_attribute *attr, char *buf)
1069{
1070 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1071
1072 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
1073}
1074
1075static ssize_t set_umcast(struct device *dev,
1076 struct device_attribute *attr,
1077 const char *buf, size_t count)
1078{
1079 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1080 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
1081
1082 if (umcast_val > 0) {
1083 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1084 ipoib_warn(priv, "ignoring multicast groups joined directly "
1085 "by userspace\n");
1086 } else
1087 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1088
1089 return count;
1090}
1091static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
1092
1093int ipoib_add_umcast_attr(struct net_device *dev)
1094{
1095 return device_create_file(&dev->dev, &dev_attr_umcast);
1096}
1097
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001098static ssize_t create_child(struct device *dev,
1099 struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 const char *buf, size_t count)
1101{
1102 int pkey;
1103 int ret;
1104
1105 if (sscanf(buf, "%i", &pkey) != 1)
1106 return -EINVAL;
1107
1108 if (pkey < 0 || pkey > 0xffff)
1109 return -EINVAL;
1110
Roland Dreier4ce05932005-08-19 12:03:17 -07001111 /*
1112 * Set the full membership bit, so that we join the right
1113 * broadcast group, etc.
1114 */
1115 pkey |= 0x8000;
1116
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001117 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119 return ret ? ret : count;
1120}
Or Gerlitz7a52b342010-06-06 04:59:16 +00001121static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001123static ssize_t delete_child(struct device *dev,
1124 struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 const char *buf, size_t count)
1126{
1127 int pkey;
1128 int ret;
1129
1130 if (sscanf(buf, "%i", &pkey) != 1)
1131 return -EINVAL;
1132
1133 if (pkey < 0 || pkey > 0xffff)
1134 return -EINVAL;
1135
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001136 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
1138 return ret ? ret : count;
1139
1140}
Or Gerlitz7a52b342010-06-06 04:59:16 +00001141static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
1143int ipoib_add_pkey_attr(struct net_device *dev)
1144{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001145 return device_create_file(&dev->dev, &dev_attr_pkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146}
1147
Or Gerlitz83bb63f2008-10-22 15:49:49 -07001148int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
1149{
1150 struct ib_device_attr *device_attr;
1151 int result = -ENOMEM;
1152
1153 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
1154 if (!device_attr) {
1155 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
1156 hca->name, sizeof *device_attr);
1157 return result;
1158 }
1159
1160 result = ib_query_device(hca, device_attr);
1161 if (result) {
1162 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
1163 hca->name, result);
1164 kfree(device_attr);
1165 return result;
1166 }
1167 priv->hca_caps = device_attr->device_cap_flags;
1168
1169 kfree(device_attr);
1170
1171 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
Michał Mirosław3d96c742011-04-19 00:43:20 +00001172 priv->dev->hw_features = NETIF_F_SG |
1173 NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1174
1175 if (priv->hca_caps & IB_DEVICE_UD_TSO)
1176 priv->dev->hw_features |= NETIF_F_TSO;
1177
1178 priv->dev->features |= priv->dev->hw_features;
Or Gerlitz83bb63f2008-10-22 15:49:49 -07001179 }
1180
Or Gerlitz83bb63f2008-10-22 15:49:49 -07001181 return 0;
1182}
1183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184static struct net_device *ipoib_add_port(const char *format,
1185 struct ib_device *hca, u8 port)
1186{
1187 struct ipoib_dev_priv *priv;
Shirley Mabc7b3a32008-04-23 11:55:45 -07001188 struct ib_port_attr attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 int result = -ENOMEM;
1190
1191 priv = ipoib_intf_alloc(format);
1192 if (!priv)
1193 goto alloc_mem_failed;
1194
1195 SET_NETDEV_DEV(priv->dev, hca->dma_device);
Eli Cohenc3aa9b12010-09-20 07:05:06 +00001196 priv->dev->dev_id = port - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
Shirley Mabc7b3a32008-04-23 11:55:45 -07001198 if (!ib_query_port(hca, port, &attr))
1199 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1200 else {
1201 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
1202 hca->name, port);
1203 goto device_init_failed;
1204 }
1205
1206 /* MTU will be reset when mcast join happens */
1207 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1208 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
1209
David Miller596b9b62011-07-25 00:01:25 +00001210 priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh);
1211
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1213 if (result) {
1214 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1215 hca->name, port, result);
Eli Cohenca6de172007-08-21 18:46:10 +03001216 goto device_init_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 }
1218
Or Gerlitz83bb63f2008-10-22 15:49:49 -07001219 if (ipoib_set_dev_features(priv, hca))
Eli Cohen60461362008-04-16 21:01:10 -07001220 goto device_init_failed;
Vladimir Sokolovskyaf40da82008-07-14 23:48:48 -07001221
Roland Dreier4ce05932005-08-19 12:03:17 -07001222 /*
1223 * Set the full membership bit, so that we join the right
1224 * broadcast group, etc.
1225 */
1226 priv->pkey |= 0x8000;
1227
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 priv->dev->broadcast[8] = priv->pkey >> 8;
1229 priv->dev->broadcast[9] = priv->pkey & 0xff;
1230
1231 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1232 if (result) {
1233 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1234 hca->name, port, result);
Eli Cohenca6de172007-08-21 18:46:10 +03001235 goto device_init_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 } else
1237 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1238
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 result = ipoib_dev_init(priv->dev, hca, port);
1240 if (result < 0) {
1241 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1242 hca->name, port, result);
1243 goto device_init_failed;
1244 }
1245
1246 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1247 priv->ca, ipoib_event);
1248 result = ib_register_event_handler(&priv->event_handler);
1249 if (result < 0) {
1250 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1251 "port %d (ret = %d)\n",
1252 hca->name, port, result);
1253 goto event_failed;
1254 }
1255
1256 result = register_netdev(priv->dev);
1257 if (result) {
1258 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1259 hca->name, port, result);
1260 goto register_failed;
1261 }
1262
Roland Dreier1732b0e2005-11-07 10:33:11 -08001263 ipoib_create_debug_files(priv->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Michael S. Tsirkin839fcab2007-02-05 22:12:23 +02001265 if (ipoib_cm_add_mode_attr(priv->dev))
1266 goto sysfs_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 if (ipoib_add_pkey_attr(priv->dev))
1268 goto sysfs_failed;
Or Gerlitz335a64a5a2007-10-08 10:13:00 +02001269 if (ipoib_add_umcast_attr(priv->dev))
1270 goto sysfs_failed;
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001271 if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 goto sysfs_failed;
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001273 if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 goto sysfs_failed;
1275
1276 return priv->dev;
1277
1278sysfs_failed:
Roland Dreier1732b0e2005-11-07 10:33:11 -08001279 ipoib_delete_debug_files(priv->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 unregister_netdev(priv->dev);
1281
1282register_failed:
1283 ib_unregister_event_handler(&priv->event_handler);
Roland Dreiera77a57a2008-08-19 15:01:32 -07001284 flush_workqueue(ipoib_workqueue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
1286event_failed:
1287 ipoib_dev_cleanup(priv->dev);
1288
1289device_init_failed:
1290 free_netdev(priv->dev);
1291
1292alloc_mem_failed:
1293 return ERR_PTR(result);
1294}
1295
1296static void ipoib_add_one(struct ib_device *device)
1297{
1298 struct list_head *dev_list;
1299 struct net_device *dev;
1300 struct ipoib_dev_priv *priv;
1301 int s, e, p;
1302
Tom Tucker07ebafb2006-08-03 16:02:42 -05001303 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1304 return;
1305
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1307 if (!dev_list)
1308 return;
1309
1310 INIT_LIST_HEAD(dev_list);
1311
Tom Tucker07ebafb2006-08-03 16:02:42 -05001312 if (device->node_type == RDMA_NODE_IB_SWITCH) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 s = 0;
1314 e = 0;
1315 } else {
1316 s = 1;
1317 e = device->phys_port_cnt;
1318 }
1319
1320 for (p = s; p <= e; ++p) {
Eli Cohen7b4c8762010-09-27 17:51:11 -07001321 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND)
1322 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 dev = ipoib_add_port("ib%d", device, p);
1324 if (!IS_ERR(dev)) {
1325 priv = netdev_priv(dev);
1326 list_add_tail(&priv->list, dev_list);
1327 }
1328 }
1329
1330 ib_set_client_data(device, &ipoib_client, dev_list);
1331}
1332
1333static void ipoib_remove_one(struct ib_device *device)
1334{
1335 struct ipoib_dev_priv *priv, *tmp;
1336 struct list_head *dev_list;
1337
Tom Tucker07ebafb2006-08-03 16:02:42 -05001338 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1339 return;
1340
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 dev_list = ib_get_client_data(device, &ipoib_client);
1342
1343 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1344 ib_unregister_event_handler(&priv->event_handler);
Roland Dreiera77a57a2008-08-19 15:01:32 -07001345
1346 rtnl_lock();
1347 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
1348 rtnl_unlock();
1349
1350 flush_workqueue(ipoib_workqueue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
1352 unregister_netdev(priv->dev);
1353 ipoib_dev_cleanup(priv->dev);
1354 free_netdev(priv->dev);
1355 }
Michael S. Tsirkin06c56e42005-09-01 09:19:02 -07001356
1357 kfree(dev_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358}
1359
1360static int __init ipoib_init_module(void)
1361{
1362 int ret;
1363
Shirley Ma0f485252006-04-10 09:43:58 -07001364 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1365 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1366 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1367
1368 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1369 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
Hagen Paul Pfeifer732eacc2010-10-26 14:22:23 -07001370 ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
Pradeep Satyanarayana68e995a2008-01-25 14:15:24 -08001371#ifdef CONFIG_INFINIBAND_IPOIB_CM
1372 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1373#endif
Shirley Ma0f485252006-04-10 09:43:58 -07001374
Eli Cohenf89271da2008-07-14 23:48:44 -07001375 /*
1376 * When copying small received packets, we only copy from the
1377 * linear data part of the SKB, so we rely on this condition.
1378 */
1379 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 ret = ipoib_register_debugfs();
1382 if (ret)
1383 return ret;
1384
1385 /*
1386 * We create our own workqueue mainly because we want to be
1387 * able to flush it when devices are being removed. We can't
1388 * use schedule_work()/flush_scheduled_work() because both
1389 * unregister_netdev() and linkwatch_event take the rtnl lock,
1390 * so flush_scheduled_work() can deadlock during device
1391 * removal.
1392 */
1393 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1394 if (!ipoib_workqueue) {
1395 ret = -ENOMEM;
1396 goto err_fs;
1397 }
1398
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -07001399 ib_sa_register_client(&ipoib_sa_client);
1400
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 ret = ib_register_client(&ipoib_client);
1402 if (ret)
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -07001403 goto err_sa;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
1405 return 0;
1406
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -07001407err_sa:
1408 ib_sa_unregister_client(&ipoib_sa_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 destroy_workqueue(ipoib_workqueue);
1410
Roland Dreier9adec1a2005-04-16 15:26:07 -07001411err_fs:
1412 ipoib_unregister_debugfs();
1413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 return ret;
1415}
1416
1417static void __exit ipoib_cleanup_module(void)
1418{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 ib_unregister_client(&ipoib_client);
Michael S. Tsirkinc1a0b232006-08-21 16:40:12 -07001420 ib_sa_unregister_client(&ipoib_sa_client);
Roland Dreier9adec1a2005-04-16 15:26:07 -07001421 ipoib_unregister_debugfs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 destroy_workqueue(ipoib_workqueue);
1423}
1424
1425module_init(ipoib_init_module);
1426module_exit(ipoib_cleanup_module);