Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. 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 | * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $ |
| 33 | */ |
| 34 | |
| 35 | #include "ipoib.h" |
| 36 | |
| 37 | #include <linux/version.h> |
| 38 | #include <linux/module.h> |
| 39 | |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/vmalloc.h> |
| 43 | |
| 44 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ |
| 45 | |
| 46 | #include <linux/ip.h> |
| 47 | #include <linux/in.h> |
| 48 | |
| 49 | MODULE_AUTHOR("Roland Dreier"); |
| 50 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); |
| 51 | MODULE_LICENSE("Dual BSD/GPL"); |
| 52 | |
| 53 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
| 54 | int ipoib_debug_level; |
| 55 | |
| 56 | module_param_named(debug_level, ipoib_debug_level, int, 0644); |
| 57 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); |
| 58 | #endif |
| 59 | |
| 60 | static const u8 ipv4_bcast_addr[] = { |
| 61 | 0x00, 0xff, 0xff, 0xff, |
| 62 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, |
| 63 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff |
| 64 | }; |
| 65 | |
| 66 | struct workqueue_struct *ipoib_workqueue; |
| 67 | |
| 68 | static void ipoib_add_one(struct ib_device *device); |
| 69 | static void ipoib_remove_one(struct ib_device *device); |
| 70 | |
| 71 | static struct ib_client ipoib_client = { |
| 72 | .name = "ipoib", |
| 73 | .add = ipoib_add_one, |
| 74 | .remove = ipoib_remove_one |
| 75 | }; |
| 76 | |
| 77 | int ipoib_open(struct net_device *dev) |
| 78 | { |
| 79 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 80 | |
| 81 | ipoib_dbg(priv, "bringing up interface\n"); |
| 82 | |
| 83 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
| 84 | |
| 85 | if (ipoib_pkey_dev_delay_open(dev)) |
| 86 | return 0; |
| 87 | |
| 88 | if (ipoib_ib_dev_open(dev)) |
| 89 | return -EINVAL; |
| 90 | |
| 91 | if (ipoib_ib_dev_up(dev)) |
| 92 | return -EINVAL; |
| 93 | |
| 94 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { |
| 95 | struct ipoib_dev_priv *cpriv; |
| 96 | |
| 97 | /* Bring up any child interfaces too */ |
| 98 | down(&priv->vlan_mutex); |
| 99 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
| 100 | int flags; |
| 101 | |
| 102 | flags = cpriv->dev->flags; |
| 103 | if (flags & IFF_UP) |
| 104 | continue; |
| 105 | |
| 106 | dev_change_flags(cpriv->dev, flags | IFF_UP); |
| 107 | } |
| 108 | up(&priv->vlan_mutex); |
| 109 | } |
| 110 | |
| 111 | netif_start_queue(dev); |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int ipoib_stop(struct net_device *dev) |
| 117 | { |
| 118 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 119 | |
| 120 | ipoib_dbg(priv, "stopping interface\n"); |
| 121 | |
| 122 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
| 123 | |
| 124 | netif_stop_queue(dev); |
| 125 | |
| 126 | ipoib_ib_dev_down(dev); |
| 127 | ipoib_ib_dev_stop(dev); |
| 128 | |
| 129 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { |
| 130 | struct ipoib_dev_priv *cpriv; |
| 131 | |
| 132 | /* Bring down any child interfaces too */ |
| 133 | down(&priv->vlan_mutex); |
| 134 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
| 135 | int flags; |
| 136 | |
| 137 | flags = cpriv->dev->flags; |
| 138 | if (!(flags & IFF_UP)) |
| 139 | continue; |
| 140 | |
| 141 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); |
| 142 | } |
| 143 | up(&priv->vlan_mutex); |
| 144 | } |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
| 150 | { |
| 151 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 152 | |
| 153 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) |
| 154 | return -EINVAL; |
| 155 | |
| 156 | priv->admin_mtu = new_mtu; |
| 157 | |
| 158 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static struct ipoib_path *__path_find(struct net_device *dev, |
| 164 | union ib_gid *gid) |
| 165 | { |
| 166 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 167 | struct rb_node *n = priv->path_tree.rb_node; |
| 168 | struct ipoib_path *path; |
| 169 | int ret; |
| 170 | |
| 171 | while (n) { |
| 172 | path = rb_entry(n, struct ipoib_path, rb_node); |
| 173 | |
| 174 | ret = memcmp(gid->raw, path->pathrec.dgid.raw, |
| 175 | sizeof (union ib_gid)); |
| 176 | |
| 177 | if (ret < 0) |
| 178 | n = n->rb_left; |
| 179 | else if (ret > 0) |
| 180 | n = n->rb_right; |
| 181 | else |
| 182 | return path; |
| 183 | } |
| 184 | |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | static int __path_add(struct net_device *dev, struct ipoib_path *path) |
| 189 | { |
| 190 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 191 | struct rb_node **n = &priv->path_tree.rb_node; |
| 192 | struct rb_node *pn = NULL; |
| 193 | struct ipoib_path *tpath; |
| 194 | int ret; |
| 195 | |
| 196 | while (*n) { |
| 197 | pn = *n; |
| 198 | tpath = rb_entry(pn, struct ipoib_path, rb_node); |
| 199 | |
| 200 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, |
| 201 | sizeof (union ib_gid)); |
| 202 | if (ret < 0) |
| 203 | n = &pn->rb_left; |
| 204 | else if (ret > 0) |
| 205 | n = &pn->rb_right; |
| 206 | else |
| 207 | return -EEXIST; |
| 208 | } |
| 209 | |
| 210 | rb_link_node(&path->rb_node, pn, n); |
| 211 | rb_insert_color(&path->rb_node, &priv->path_tree); |
| 212 | |
| 213 | list_add_tail(&path->list, &priv->path_list); |
| 214 | |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static void path_free(struct net_device *dev, struct ipoib_path *path) |
| 219 | { |
| 220 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 221 | struct ipoib_neigh *neigh, *tn; |
| 222 | struct sk_buff *skb; |
| 223 | unsigned long flags; |
| 224 | |
| 225 | while ((skb = __skb_dequeue(&path->queue))) |
| 226 | dev_kfree_skb_irq(skb); |
| 227 | |
| 228 | spin_lock_irqsave(&priv->lock, flags); |
| 229 | |
| 230 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
| 231 | /* |
| 232 | * It's safe to call ipoib_put_ah() inside priv->lock |
| 233 | * here, because we know that path->ah will always |
| 234 | * hold one more reference, so ipoib_put_ah() will |
| 235 | * never do more than decrement the ref count. |
| 236 | */ |
| 237 | if (neigh->ah) |
| 238 | ipoib_put_ah(neigh->ah); |
| 239 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
| 240 | neigh->neighbour->ops->destructor = NULL; |
| 241 | kfree(neigh); |
| 242 | } |
| 243 | |
| 244 | spin_unlock_irqrestore(&priv->lock, flags); |
| 245 | |
| 246 | if (path->ah) |
| 247 | ipoib_put_ah(path->ah); |
| 248 | |
| 249 | kfree(path); |
| 250 | } |
| 251 | |
| 252 | void ipoib_flush_paths(struct net_device *dev) |
| 253 | { |
| 254 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 255 | struct ipoib_path *path, *tp; |
| 256 | LIST_HEAD(remove_list); |
| 257 | unsigned long flags; |
| 258 | |
| 259 | spin_lock_irqsave(&priv->lock, flags); |
| 260 | |
| 261 | list_splice(&priv->path_list, &remove_list); |
| 262 | INIT_LIST_HEAD(&priv->path_list); |
| 263 | |
| 264 | list_for_each_entry(path, &remove_list, list) |
| 265 | rb_erase(&path->rb_node, &priv->path_tree); |
| 266 | |
| 267 | spin_unlock_irqrestore(&priv->lock, flags); |
| 268 | |
| 269 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
| 270 | if (path->query) |
| 271 | ib_sa_cancel_query(path->query_id, path->query); |
| 272 | wait_for_completion(&path->done); |
| 273 | path_free(dev, path); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | static void path_rec_completion(int status, |
| 278 | struct ib_sa_path_rec *pathrec, |
| 279 | void *path_ptr) |
| 280 | { |
| 281 | struct ipoib_path *path = path_ptr; |
| 282 | struct net_device *dev = path->dev; |
| 283 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 284 | struct ipoib_ah *ah = NULL; |
| 285 | struct ipoib_neigh *neigh; |
| 286 | struct sk_buff_head skqueue; |
| 287 | struct sk_buff *skb; |
| 288 | unsigned long flags; |
| 289 | |
| 290 | if (pathrec) |
| 291 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", |
| 292 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); |
| 293 | else |
| 294 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", |
| 295 | status, IPOIB_GID_ARG(path->pathrec.dgid)); |
| 296 | |
| 297 | skb_queue_head_init(&skqueue); |
| 298 | |
| 299 | if (!status) { |
| 300 | struct ib_ah_attr av = { |
| 301 | .dlid = be16_to_cpu(pathrec->dlid), |
| 302 | .sl = pathrec->sl, |
| 303 | .port_num = priv->port |
| 304 | }; |
Roland Dreier | e6ded99 | 2005-04-16 15:26:06 -0700 | [diff] [blame] | 305 | int path_rate = ib_sa_rate_enum_to_int(pathrec->rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Roland Dreier | e6ded99 | 2005-04-16 15:26:06 -0700 | [diff] [blame] | 307 | if (path_rate > 0 && priv->local_rate > path_rate) |
| 308 | av.static_rate = (priv->local_rate - 1) / path_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n", |
| 311 | av.static_rate, priv->local_rate, |
| 312 | ib_sa_rate_enum_to_int(pathrec->rate)); |
| 313 | |
| 314 | ah = ipoib_create_ah(dev, priv->pd, &av); |
| 315 | } |
| 316 | |
| 317 | spin_lock_irqsave(&priv->lock, flags); |
| 318 | |
| 319 | path->ah = ah; |
| 320 | |
| 321 | if (ah) { |
| 322 | path->pathrec = *pathrec; |
| 323 | |
| 324 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
| 325 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); |
| 326 | |
| 327 | while ((skb = __skb_dequeue(&path->queue))) |
| 328 | __skb_queue_tail(&skqueue, skb); |
| 329 | |
| 330 | list_for_each_entry(neigh, &path->neigh_list, list) { |
| 331 | kref_get(&path->ah->ref); |
| 332 | neigh->ah = path->ah; |
| 333 | |
| 334 | while ((skb = __skb_dequeue(&neigh->queue))) |
| 335 | __skb_queue_tail(&skqueue, skb); |
| 336 | } |
| 337 | } else |
| 338 | path->query = NULL; |
| 339 | |
| 340 | complete(&path->done); |
| 341 | |
| 342 | spin_unlock_irqrestore(&priv->lock, flags); |
| 343 | |
| 344 | while ((skb = __skb_dequeue(&skqueue))) { |
| 345 | skb->dev = dev; |
| 346 | if (dev_queue_xmit(skb)) |
| 347 | ipoib_warn(priv, "dev_queue_xmit failed " |
| 348 | "to requeue packet\n"); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | static struct ipoib_path *path_rec_create(struct net_device *dev, |
| 353 | union ib_gid *gid) |
| 354 | { |
| 355 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 356 | struct ipoib_path *path; |
| 357 | |
| 358 | path = kmalloc(sizeof *path, GFP_ATOMIC); |
| 359 | if (!path) |
| 360 | return NULL; |
| 361 | |
| 362 | path->dev = dev; |
| 363 | path->pathrec.dlid = 0; |
| 364 | path->ah = NULL; |
| 365 | |
| 366 | skb_queue_head_init(&path->queue); |
| 367 | |
| 368 | INIT_LIST_HEAD(&path->neigh_list); |
| 369 | path->query = NULL; |
| 370 | init_completion(&path->done); |
| 371 | |
| 372 | memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid)); |
| 373 | path->pathrec.sgid = priv->local_gid; |
| 374 | path->pathrec.pkey = cpu_to_be16(priv->pkey); |
| 375 | path->pathrec.numb_path = 1; |
| 376 | |
| 377 | return path; |
| 378 | } |
| 379 | |
| 380 | static int path_rec_start(struct net_device *dev, |
| 381 | struct ipoib_path *path) |
| 382 | { |
| 383 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 384 | |
| 385 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", |
| 386 | IPOIB_GID_ARG(path->pathrec.dgid)); |
| 387 | |
| 388 | path->query_id = |
| 389 | ib_sa_path_rec_get(priv->ca, priv->port, |
| 390 | &path->pathrec, |
| 391 | IB_SA_PATH_REC_DGID | |
| 392 | IB_SA_PATH_REC_SGID | |
| 393 | IB_SA_PATH_REC_NUMB_PATH | |
| 394 | IB_SA_PATH_REC_PKEY, |
| 395 | 1000, GFP_ATOMIC, |
| 396 | path_rec_completion, |
| 397 | path, &path->query); |
| 398 | if (path->query_id < 0) { |
| 399 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); |
| 400 | path->query = NULL; |
| 401 | return path->query_id; |
| 402 | } |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) |
| 408 | { |
| 409 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 410 | struct ipoib_path *path; |
| 411 | struct ipoib_neigh *neigh; |
| 412 | |
| 413 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); |
| 414 | if (!neigh) { |
| 415 | ++priv->stats.tx_dropped; |
| 416 | dev_kfree_skb_any(skb); |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | skb_queue_head_init(&neigh->queue); |
| 421 | neigh->neighbour = skb->dst->neighbour; |
| 422 | *to_ipoib_neigh(skb->dst->neighbour) = neigh; |
| 423 | |
| 424 | /* |
| 425 | * We can only be called from ipoib_start_xmit, so we're |
| 426 | * inside tx_lock -- no need to save/restore flags. |
| 427 | */ |
| 428 | spin_lock(&priv->lock); |
| 429 | |
| 430 | path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4)); |
| 431 | if (!path) { |
| 432 | path = path_rec_create(dev, |
| 433 | (union ib_gid *) (skb->dst->neighbour->ha + 4)); |
| 434 | if (!path) |
| 435 | goto err; |
| 436 | |
| 437 | __path_add(dev, path); |
| 438 | } |
| 439 | |
| 440 | list_add_tail(&neigh->list, &path->neigh_list); |
| 441 | |
| 442 | if (path->pathrec.dlid) { |
| 443 | kref_get(&path->ah->ref); |
| 444 | neigh->ah = path->ah; |
| 445 | |
| 446 | ipoib_send(dev, skb, path->ah, |
| 447 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); |
| 448 | } else { |
| 449 | neigh->ah = NULL; |
| 450 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| 451 | __skb_queue_tail(&neigh->queue, skb); |
| 452 | } else { |
| 453 | ++priv->stats.tx_dropped; |
| 454 | dev_kfree_skb_any(skb); |
| 455 | } |
| 456 | |
| 457 | if (!path->query && path_rec_start(dev, path)) |
| 458 | goto err; |
| 459 | } |
| 460 | |
| 461 | spin_unlock(&priv->lock); |
| 462 | return; |
| 463 | |
| 464 | err: |
| 465 | *to_ipoib_neigh(skb->dst->neighbour) = NULL; |
| 466 | list_del(&neigh->list); |
| 467 | neigh->neighbour->ops->destructor = NULL; |
| 468 | kfree(neigh); |
| 469 | |
| 470 | ++priv->stats.tx_dropped; |
| 471 | dev_kfree_skb_any(skb); |
| 472 | |
| 473 | spin_unlock(&priv->lock); |
| 474 | } |
| 475 | |
| 476 | static void path_lookup(struct sk_buff *skb, struct net_device *dev) |
| 477 | { |
| 478 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); |
| 479 | |
| 480 | /* Look up path record for unicasts */ |
| 481 | if (skb->dst->neighbour->ha[4] != 0xff) { |
| 482 | neigh_add_path(skb, dev); |
| 483 | return; |
| 484 | } |
| 485 | |
| 486 | /* Add in the P_Key for multicasts */ |
| 487 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; |
| 488 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; |
| 489 | ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb); |
| 490 | } |
| 491 | |
| 492 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, |
| 493 | struct ipoib_pseudoheader *phdr) |
| 494 | { |
| 495 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 496 | struct ipoib_path *path; |
| 497 | |
| 498 | /* |
| 499 | * We can only be called from ipoib_start_xmit, so we're |
| 500 | * inside tx_lock -- no need to save/restore flags. |
| 501 | */ |
| 502 | spin_lock(&priv->lock); |
| 503 | |
| 504 | path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4)); |
| 505 | if (!path) { |
| 506 | path = path_rec_create(dev, |
| 507 | (union ib_gid *) (phdr->hwaddr + 4)); |
| 508 | if (path) { |
| 509 | /* put pseudoheader back on for next time */ |
| 510 | skb_push(skb, sizeof *phdr); |
| 511 | __skb_queue_tail(&path->queue, skb); |
| 512 | |
| 513 | if (path_rec_start(dev, path)) { |
| 514 | spin_unlock(&priv->lock); |
| 515 | path_free(dev, path); |
| 516 | return; |
| 517 | } else |
| 518 | __path_add(dev, path); |
| 519 | } else { |
| 520 | ++priv->stats.tx_dropped; |
| 521 | dev_kfree_skb_any(skb); |
| 522 | } |
| 523 | |
| 524 | spin_unlock(&priv->lock); |
| 525 | return; |
| 526 | } |
| 527 | |
| 528 | if (path->pathrec.dlid) { |
| 529 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
| 530 | be16_to_cpu(path->pathrec.dlid)); |
| 531 | |
| 532 | ipoib_send(dev, skb, path->ah, |
| 533 | be32_to_cpup((__be32 *) phdr->hwaddr)); |
| 534 | } else if ((path->query || !path_rec_start(dev, path)) && |
| 535 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| 536 | /* put pseudoheader back on for next time */ |
| 537 | skb_push(skb, sizeof *phdr); |
| 538 | __skb_queue_tail(&path->queue, skb); |
| 539 | } else { |
| 540 | ++priv->stats.tx_dropped; |
| 541 | dev_kfree_skb_any(skb); |
| 542 | } |
| 543 | |
| 544 | spin_unlock(&priv->lock); |
| 545 | } |
| 546 | |
| 547 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 548 | { |
| 549 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 550 | struct ipoib_neigh *neigh; |
| 551 | unsigned long flags; |
| 552 | |
| 553 | local_irq_save(flags); |
| 554 | if (!spin_trylock(&priv->tx_lock)) { |
| 555 | local_irq_restore(flags); |
| 556 | return NETDEV_TX_LOCKED; |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * Check if our queue is stopped. Since we have the LLTX bit |
| 561 | * set, we can't rely on netif_stop_queue() preventing our |
| 562 | * xmit function from being called with a full queue. |
| 563 | */ |
| 564 | if (unlikely(netif_queue_stopped(dev))) { |
| 565 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 566 | return NETDEV_TX_BUSY; |
| 567 | } |
| 568 | |
| 569 | if (skb->dst && skb->dst->neighbour) { |
| 570 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
| 571 | path_lookup(skb, dev); |
| 572 | goto out; |
| 573 | } |
| 574 | |
| 575 | neigh = *to_ipoib_neigh(skb->dst->neighbour); |
| 576 | |
| 577 | if (likely(neigh->ah)) { |
| 578 | ipoib_send(dev, skb, neigh->ah, |
| 579 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); |
| 580 | goto out; |
| 581 | } |
| 582 | |
| 583 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| 584 | spin_lock(&priv->lock); |
| 585 | __skb_queue_tail(&neigh->queue, skb); |
| 586 | spin_unlock(&priv->lock); |
| 587 | } else { |
| 588 | ++priv->stats.tx_dropped; |
| 589 | dev_kfree_skb_any(skb); |
| 590 | } |
| 591 | } else { |
| 592 | struct ipoib_pseudoheader *phdr = |
| 593 | (struct ipoib_pseudoheader *) skb->data; |
| 594 | skb_pull(skb, sizeof *phdr); |
| 595 | |
| 596 | if (phdr->hwaddr[4] == 0xff) { |
| 597 | /* Add in the P_Key for multicast*/ |
| 598 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; |
| 599 | phdr->hwaddr[9] = priv->pkey & 0xff; |
| 600 | |
| 601 | ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb); |
| 602 | } else { |
| 603 | /* unicast GID -- should be ARP reply */ |
| 604 | |
| 605 | if (be16_to_cpup((u16 *) skb->data) != ETH_P_ARP) { |
| 606 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
| 607 | IPOIB_GID_FMT "\n", |
| 608 | skb->dst ? "neigh" : "dst", |
| 609 | be16_to_cpup((u16 *) skb->data), |
| 610 | be32_to_cpup((u32 *) phdr->hwaddr), |
| 611 | IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4))); |
| 612 | dev_kfree_skb_any(skb); |
| 613 | ++priv->stats.tx_dropped; |
| 614 | goto out; |
| 615 | } |
| 616 | |
| 617 | unicast_arp_send(skb, dev, phdr); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | out: |
| 622 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 623 | |
| 624 | return NETDEV_TX_OK; |
| 625 | } |
| 626 | |
| 627 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) |
| 628 | { |
| 629 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 630 | |
| 631 | return &priv->stats; |
| 632 | } |
| 633 | |
| 634 | static void ipoib_timeout(struct net_device *dev) |
| 635 | { |
| 636 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 637 | |
| 638 | ipoib_warn(priv, "transmit timeout: latency %ld\n", |
| 639 | jiffies - dev->trans_start); |
| 640 | /* XXX reset QP, etc. */ |
| 641 | } |
| 642 | |
| 643 | static int ipoib_hard_header(struct sk_buff *skb, |
| 644 | struct net_device *dev, |
| 645 | unsigned short type, |
| 646 | void *daddr, void *saddr, unsigned len) |
| 647 | { |
| 648 | struct ipoib_header *header; |
| 649 | |
| 650 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); |
| 651 | |
| 652 | header->proto = htons(type); |
| 653 | header->reserved = 0; |
| 654 | |
| 655 | /* |
| 656 | * If we don't have a neighbour structure, stuff the |
| 657 | * destination address onto the front of the skb so we can |
| 658 | * figure out where to send the packet later. |
| 659 | */ |
| 660 | if (!skb->dst || !skb->dst->neighbour) { |
| 661 | struct ipoib_pseudoheader *phdr = |
| 662 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); |
| 663 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); |
| 664 | } |
| 665 | |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | static void ipoib_set_mcast_list(struct net_device *dev) |
| 670 | { |
| 671 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 672 | |
| 673 | schedule_work(&priv->restart_task); |
| 674 | } |
| 675 | |
| 676 | static void ipoib_neigh_destructor(struct neighbour *n) |
| 677 | { |
| 678 | struct ipoib_neigh *neigh; |
| 679 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); |
| 680 | unsigned long flags; |
| 681 | struct ipoib_ah *ah = NULL; |
| 682 | |
| 683 | ipoib_dbg(priv, |
| 684 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", |
| 685 | be32_to_cpup((__be32 *) n->ha), |
| 686 | IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4)))); |
| 687 | |
| 688 | spin_lock_irqsave(&priv->lock, flags); |
| 689 | |
| 690 | neigh = *to_ipoib_neigh(n); |
| 691 | if (neigh) { |
| 692 | if (neigh->ah) |
| 693 | ah = neigh->ah; |
| 694 | list_del(&neigh->list); |
| 695 | *to_ipoib_neigh(n) = NULL; |
| 696 | kfree(neigh); |
| 697 | } |
| 698 | |
| 699 | spin_unlock_irqrestore(&priv->lock, flags); |
| 700 | |
| 701 | if (ah) |
| 702 | ipoib_put_ah(ah); |
| 703 | } |
| 704 | |
| 705 | static int ipoib_neigh_setup(struct neighbour *neigh) |
| 706 | { |
| 707 | /* |
| 708 | * Is this kosher? I can't find anybody in the kernel that |
| 709 | * sets neigh->destructor, so we should be able to set it here |
| 710 | * without trouble. |
| 711 | */ |
| 712 | neigh->ops->destructor = ipoib_neigh_destructor; |
| 713 | |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
| 718 | { |
| 719 | parms->neigh_setup = ipoib_neigh_setup; |
| 720 | |
| 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
| 725 | { |
| 726 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 727 | |
| 728 | /* Allocate RX/TX "rings" to hold queued skbs */ |
| 729 | |
| 730 | priv->rx_ring = kmalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf), |
| 731 | GFP_KERNEL); |
| 732 | if (!priv->rx_ring) { |
| 733 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", |
| 734 | ca->name, IPOIB_RX_RING_SIZE); |
| 735 | goto out; |
| 736 | } |
| 737 | memset(priv->rx_ring, 0, |
| 738 | IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf)); |
| 739 | |
| 740 | priv->tx_ring = kmalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf), |
| 741 | GFP_KERNEL); |
| 742 | if (!priv->tx_ring) { |
| 743 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", |
| 744 | ca->name, IPOIB_TX_RING_SIZE); |
| 745 | goto out_rx_ring_cleanup; |
| 746 | } |
| 747 | memset(priv->tx_ring, 0, |
| 748 | IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf)); |
| 749 | |
| 750 | /* priv->tx_head & tx_tail are already 0 */ |
| 751 | |
| 752 | if (ipoib_ib_dev_init(dev, ca, port)) |
| 753 | goto out_tx_ring_cleanup; |
| 754 | |
| 755 | return 0; |
| 756 | |
| 757 | out_tx_ring_cleanup: |
| 758 | kfree(priv->tx_ring); |
| 759 | |
| 760 | out_rx_ring_cleanup: |
| 761 | kfree(priv->rx_ring); |
| 762 | |
| 763 | out: |
| 764 | return -ENOMEM; |
| 765 | } |
| 766 | |
| 767 | void ipoib_dev_cleanup(struct net_device *dev) |
| 768 | { |
| 769 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; |
| 770 | |
| 771 | ipoib_delete_debug_file(dev); |
| 772 | |
| 773 | /* Delete any child interfaces first */ |
| 774 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { |
| 775 | unregister_netdev(cpriv->dev); |
| 776 | ipoib_dev_cleanup(cpriv->dev); |
| 777 | free_netdev(cpriv->dev); |
| 778 | } |
| 779 | |
| 780 | ipoib_ib_dev_cleanup(dev); |
| 781 | |
| 782 | if (priv->rx_ring) { |
| 783 | kfree(priv->rx_ring); |
| 784 | priv->rx_ring = NULL; |
| 785 | } |
| 786 | |
| 787 | if (priv->tx_ring) { |
| 788 | kfree(priv->tx_ring); |
| 789 | priv->tx_ring = NULL; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | static void ipoib_setup(struct net_device *dev) |
| 794 | { |
| 795 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 796 | |
| 797 | dev->open = ipoib_open; |
| 798 | dev->stop = ipoib_stop; |
| 799 | dev->change_mtu = ipoib_change_mtu; |
| 800 | dev->hard_start_xmit = ipoib_start_xmit; |
| 801 | dev->get_stats = ipoib_get_stats; |
| 802 | dev->tx_timeout = ipoib_timeout; |
| 803 | dev->hard_header = ipoib_hard_header; |
| 804 | dev->set_multicast_list = ipoib_set_mcast_list; |
| 805 | dev->neigh_setup = ipoib_neigh_setup_dev; |
| 806 | |
| 807 | dev->watchdog_timeo = HZ; |
| 808 | |
| 809 | dev->rebuild_header = NULL; |
| 810 | dev->set_mac_address = NULL; |
| 811 | dev->header_cache_update = NULL; |
| 812 | |
| 813 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
| 814 | |
| 815 | /* |
| 816 | * We add in INFINIBAND_ALEN to allow for the destination |
| 817 | * address "pseudoheader" for skbs without neighbour struct. |
| 818 | */ |
| 819 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; |
| 820 | dev->addr_len = INFINIBAND_ALEN; |
| 821 | dev->type = ARPHRD_INFINIBAND; |
| 822 | dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2; |
| 823 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
| 824 | |
| 825 | /* MTU will be reset when mcast join happens */ |
| 826 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; |
| 827 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; |
| 828 | |
| 829 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
| 830 | |
| 831 | netif_carrier_off(dev); |
| 832 | |
| 833 | SET_MODULE_OWNER(dev); |
| 834 | |
| 835 | priv->dev = dev; |
| 836 | |
| 837 | spin_lock_init(&priv->lock); |
| 838 | spin_lock_init(&priv->tx_lock); |
| 839 | |
| 840 | init_MUTEX(&priv->mcast_mutex); |
| 841 | init_MUTEX(&priv->vlan_mutex); |
| 842 | |
| 843 | INIT_LIST_HEAD(&priv->path_list); |
| 844 | INIT_LIST_HEAD(&priv->child_intfs); |
| 845 | INIT_LIST_HEAD(&priv->dead_ahs); |
| 846 | INIT_LIST_HEAD(&priv->multicast_list); |
| 847 | |
| 848 | INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev); |
| 849 | INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev); |
| 850 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev); |
| 851 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev); |
| 852 | INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev); |
| 853 | } |
| 854 | |
| 855 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) |
| 856 | { |
| 857 | struct net_device *dev; |
| 858 | |
| 859 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, |
| 860 | ipoib_setup); |
| 861 | if (!dev) |
| 862 | return NULL; |
| 863 | |
| 864 | return netdev_priv(dev); |
| 865 | } |
| 866 | |
| 867 | static ssize_t show_pkey(struct class_device *cdev, char *buf) |
| 868 | { |
| 869 | struct ipoib_dev_priv *priv = |
| 870 | netdev_priv(container_of(cdev, struct net_device, class_dev)); |
| 871 | |
| 872 | return sprintf(buf, "0x%04x\n", priv->pkey); |
| 873 | } |
| 874 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
| 875 | |
| 876 | static ssize_t create_child(struct class_device *cdev, |
| 877 | const char *buf, size_t count) |
| 878 | { |
| 879 | int pkey; |
| 880 | int ret; |
| 881 | |
| 882 | if (sscanf(buf, "%i", &pkey) != 1) |
| 883 | return -EINVAL; |
| 884 | |
| 885 | if (pkey < 0 || pkey > 0xffff) |
| 886 | return -EINVAL; |
| 887 | |
| 888 | ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev), |
| 889 | pkey); |
| 890 | |
| 891 | return ret ? ret : count; |
| 892 | } |
| 893 | static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); |
| 894 | |
| 895 | static ssize_t delete_child(struct class_device *cdev, |
| 896 | const char *buf, size_t count) |
| 897 | { |
| 898 | int pkey; |
| 899 | int ret; |
| 900 | |
| 901 | if (sscanf(buf, "%i", &pkey) != 1) |
| 902 | return -EINVAL; |
| 903 | |
| 904 | if (pkey < 0 || pkey > 0xffff) |
| 905 | return -EINVAL; |
| 906 | |
| 907 | ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev), |
| 908 | pkey); |
| 909 | |
| 910 | return ret ? ret : count; |
| 911 | |
| 912 | } |
| 913 | static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); |
| 914 | |
| 915 | int ipoib_add_pkey_attr(struct net_device *dev) |
| 916 | { |
| 917 | return class_device_create_file(&dev->class_dev, |
| 918 | &class_device_attr_pkey); |
| 919 | } |
| 920 | |
| 921 | static struct net_device *ipoib_add_port(const char *format, |
| 922 | struct ib_device *hca, u8 port) |
| 923 | { |
| 924 | struct ipoib_dev_priv *priv; |
| 925 | int result = -ENOMEM; |
| 926 | |
| 927 | priv = ipoib_intf_alloc(format); |
| 928 | if (!priv) |
| 929 | goto alloc_mem_failed; |
| 930 | |
| 931 | SET_NETDEV_DEV(priv->dev, hca->dma_device); |
| 932 | |
| 933 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
| 934 | if (result) { |
| 935 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", |
| 936 | hca->name, port, result); |
| 937 | goto alloc_mem_failed; |
| 938 | } |
| 939 | |
| 940 | priv->dev->broadcast[8] = priv->pkey >> 8; |
| 941 | priv->dev->broadcast[9] = priv->pkey & 0xff; |
| 942 | |
| 943 | result = ib_query_gid(hca, port, 0, &priv->local_gid); |
| 944 | if (result) { |
| 945 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", |
| 946 | hca->name, port, result); |
| 947 | goto alloc_mem_failed; |
| 948 | } else |
| 949 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); |
| 950 | |
| 951 | |
| 952 | result = ipoib_dev_init(priv->dev, hca, port); |
| 953 | if (result < 0) { |
| 954 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", |
| 955 | hca->name, port, result); |
| 956 | goto device_init_failed; |
| 957 | } |
| 958 | |
| 959 | INIT_IB_EVENT_HANDLER(&priv->event_handler, |
| 960 | priv->ca, ipoib_event); |
| 961 | result = ib_register_event_handler(&priv->event_handler); |
| 962 | if (result < 0) { |
| 963 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " |
| 964 | "port %d (ret = %d)\n", |
| 965 | hca->name, port, result); |
| 966 | goto event_failed; |
| 967 | } |
| 968 | |
| 969 | result = register_netdev(priv->dev); |
| 970 | if (result) { |
| 971 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", |
| 972 | hca->name, port, result); |
| 973 | goto register_failed; |
| 974 | } |
| 975 | |
| 976 | if (ipoib_create_debug_file(priv->dev)) |
| 977 | goto debug_failed; |
| 978 | |
| 979 | if (ipoib_add_pkey_attr(priv->dev)) |
| 980 | goto sysfs_failed; |
| 981 | if (class_device_create_file(&priv->dev->class_dev, |
| 982 | &class_device_attr_create_child)) |
| 983 | goto sysfs_failed; |
| 984 | if (class_device_create_file(&priv->dev->class_dev, |
| 985 | &class_device_attr_delete_child)) |
| 986 | goto sysfs_failed; |
| 987 | |
| 988 | return priv->dev; |
| 989 | |
| 990 | sysfs_failed: |
| 991 | ipoib_delete_debug_file(priv->dev); |
| 992 | |
| 993 | debug_failed: |
| 994 | unregister_netdev(priv->dev); |
| 995 | |
| 996 | register_failed: |
| 997 | ib_unregister_event_handler(&priv->event_handler); |
| 998 | |
| 999 | event_failed: |
| 1000 | ipoib_dev_cleanup(priv->dev); |
| 1001 | |
| 1002 | device_init_failed: |
| 1003 | free_netdev(priv->dev); |
| 1004 | |
| 1005 | alloc_mem_failed: |
| 1006 | return ERR_PTR(result); |
| 1007 | } |
| 1008 | |
| 1009 | static void ipoib_add_one(struct ib_device *device) |
| 1010 | { |
| 1011 | struct list_head *dev_list; |
| 1012 | struct net_device *dev; |
| 1013 | struct ipoib_dev_priv *priv; |
| 1014 | int s, e, p; |
| 1015 | |
| 1016 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
| 1017 | if (!dev_list) |
| 1018 | return; |
| 1019 | |
| 1020 | INIT_LIST_HEAD(dev_list); |
| 1021 | |
| 1022 | if (device->node_type == IB_NODE_SWITCH) { |
| 1023 | s = 0; |
| 1024 | e = 0; |
| 1025 | } else { |
| 1026 | s = 1; |
| 1027 | e = device->phys_port_cnt; |
| 1028 | } |
| 1029 | |
| 1030 | for (p = s; p <= e; ++p) { |
| 1031 | dev = ipoib_add_port("ib%d", device, p); |
| 1032 | if (!IS_ERR(dev)) { |
| 1033 | priv = netdev_priv(dev); |
| 1034 | list_add_tail(&priv->list, dev_list); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | ib_set_client_data(device, &ipoib_client, dev_list); |
| 1039 | } |
| 1040 | |
| 1041 | static void ipoib_remove_one(struct ib_device *device) |
| 1042 | { |
| 1043 | struct ipoib_dev_priv *priv, *tmp; |
| 1044 | struct list_head *dev_list; |
| 1045 | |
| 1046 | dev_list = ib_get_client_data(device, &ipoib_client); |
| 1047 | |
| 1048 | list_for_each_entry_safe(priv, tmp, dev_list, list) { |
| 1049 | ib_unregister_event_handler(&priv->event_handler); |
| 1050 | |
| 1051 | unregister_netdev(priv->dev); |
| 1052 | ipoib_dev_cleanup(priv->dev); |
| 1053 | free_netdev(priv->dev); |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | static int __init ipoib_init_module(void) |
| 1058 | { |
| 1059 | int ret; |
| 1060 | |
| 1061 | ret = ipoib_register_debugfs(); |
| 1062 | if (ret) |
| 1063 | return ret; |
| 1064 | |
| 1065 | /* |
| 1066 | * We create our own workqueue mainly because we want to be |
| 1067 | * able to flush it when devices are being removed. We can't |
| 1068 | * use schedule_work()/flush_scheduled_work() because both |
| 1069 | * unregister_netdev() and linkwatch_event take the rtnl lock, |
| 1070 | * so flush_scheduled_work() can deadlock during device |
| 1071 | * removal. |
| 1072 | */ |
| 1073 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); |
| 1074 | if (!ipoib_workqueue) { |
| 1075 | ret = -ENOMEM; |
| 1076 | goto err_fs; |
| 1077 | } |
| 1078 | |
| 1079 | ret = ib_register_client(&ipoib_client); |
| 1080 | if (ret) |
| 1081 | goto err_wq; |
| 1082 | |
| 1083 | return 0; |
| 1084 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | err_wq: |
| 1086 | destroy_workqueue(ipoib_workqueue); |
| 1087 | |
Roland Dreier | 9adec1a | 2005-04-16 15:26:07 -0700 | [diff] [blame] | 1088 | err_fs: |
| 1089 | ipoib_unregister_debugfs(); |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | return ret; |
| 1092 | } |
| 1093 | |
| 1094 | static void __exit ipoib_cleanup_module(void) |
| 1095 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | ib_unregister_client(&ipoib_client); |
Roland Dreier | 9adec1a | 2005-04-16 15:26:07 -0700 | [diff] [blame] | 1097 | ipoib_unregister_debugfs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | destroy_workqueue(ipoib_workqueue); |
| 1099 | } |
| 1100 | |
| 1101 | module_init(ipoib_init_module); |
| 1102 | module_exit(ipoib_cleanup_module); |