Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| 4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 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. |
| 33 | * |
| 34 | * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $ |
| 35 | */ |
| 36 | |
| 37 | #include "ipoib.h" |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/module.h> |
| 40 | |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/vmalloc.h> |
| 44 | |
| 45 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ |
| 46 | |
| 47 | #include <linux/ip.h> |
| 48 | #include <linux/in.h> |
| 49 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 50 | #include <net/dst.h> |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | MODULE_AUTHOR("Roland Dreier"); |
| 53 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); |
| 54 | MODULE_LICENSE("Dual BSD/GPL"); |
| 55 | |
| 56 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
| 57 | int ipoib_debug_level; |
| 58 | |
| 59 | module_param_named(debug_level, ipoib_debug_level, int, 0644); |
| 60 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); |
| 61 | #endif |
| 62 | |
Roland Dreier | 1732b0e | 2005-11-07 10:33:11 -0800 | [diff] [blame] | 63 | struct ipoib_path_iter { |
| 64 | struct net_device *dev; |
| 65 | struct ipoib_path path; |
| 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static const u8 ipv4_bcast_addr[] = { |
| 69 | 0x00, 0xff, 0xff, 0xff, |
| 70 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, |
| 71 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff |
| 72 | }; |
| 73 | |
| 74 | struct workqueue_struct *ipoib_workqueue; |
| 75 | |
| 76 | static void ipoib_add_one(struct ib_device *device); |
| 77 | static void ipoib_remove_one(struct ib_device *device); |
| 78 | |
| 79 | static struct ib_client ipoib_client = { |
| 80 | .name = "ipoib", |
| 81 | .add = ipoib_add_one, |
| 82 | .remove = ipoib_remove_one |
| 83 | }; |
| 84 | |
| 85 | int ipoib_open(struct net_device *dev) |
| 86 | { |
| 87 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 88 | |
| 89 | ipoib_dbg(priv, "bringing up interface\n"); |
| 90 | |
| 91 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
| 92 | |
| 93 | if (ipoib_pkey_dev_delay_open(dev)) |
| 94 | return 0; |
| 95 | |
| 96 | if (ipoib_ib_dev_open(dev)) |
| 97 | return -EINVAL; |
| 98 | |
Roland Dreier | 267ee88 | 2005-11-29 10:55:58 -0800 | [diff] [blame] | 99 | if (ipoib_ib_dev_up(dev)) { |
| 100 | ipoib_ib_dev_stop(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | return -EINVAL; |
Roland Dreier | 267ee88 | 2005-11-29 10:55:58 -0800 | [diff] [blame] | 102 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { |
| 105 | struct ipoib_dev_priv *cpriv; |
| 106 | |
| 107 | /* Bring up any child interfaces too */ |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 108 | mutex_lock(&priv->vlan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
| 110 | int flags; |
| 111 | |
| 112 | flags = cpriv->dev->flags; |
| 113 | if (flags & IFF_UP) |
| 114 | continue; |
| 115 | |
| 116 | dev_change_flags(cpriv->dev, flags | IFF_UP); |
| 117 | } |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 118 | mutex_unlock(&priv->vlan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | netif_start_queue(dev); |
| 122 | |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | static int ipoib_stop(struct net_device *dev) |
| 127 | { |
| 128 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 129 | |
| 130 | ipoib_dbg(priv, "stopping interface\n"); |
| 131 | |
| 132 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
| 133 | |
| 134 | netif_stop_queue(dev); |
| 135 | |
Jack Morgenstein | 0b3ea08 | 2006-03-20 10:08:24 -0800 | [diff] [blame] | 136 | /* |
| 137 | * Now flush workqueue to make sure a scheduled task doesn't |
| 138 | * bring our internal state back up. |
| 139 | */ |
| 140 | flush_workqueue(ipoib_workqueue); |
| 141 | |
| 142 | ipoib_ib_dev_down(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | ipoib_ib_dev_stop(dev); |
| 144 | |
| 145 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { |
| 146 | struct ipoib_dev_priv *cpriv; |
| 147 | |
| 148 | /* Bring down any child interfaces too */ |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 149 | mutex_lock(&priv->vlan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
| 151 | int flags; |
| 152 | |
| 153 | flags = cpriv->dev->flags; |
| 154 | if (!(flags & IFF_UP)) |
| 155 | continue; |
| 156 | |
| 157 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); |
| 158 | } |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 159 | mutex_unlock(&priv->vlan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
| 166 | { |
| 167 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 168 | |
| 169 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) |
| 170 | return -EINVAL; |
| 171 | |
| 172 | priv->admin_mtu = new_mtu; |
| 173 | |
| 174 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static struct ipoib_path *__path_find(struct net_device *dev, |
| 180 | union ib_gid *gid) |
| 181 | { |
| 182 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 183 | struct rb_node *n = priv->path_tree.rb_node; |
| 184 | struct ipoib_path *path; |
| 185 | int ret; |
| 186 | |
| 187 | while (n) { |
| 188 | path = rb_entry(n, struct ipoib_path, rb_node); |
| 189 | |
| 190 | ret = memcmp(gid->raw, path->pathrec.dgid.raw, |
| 191 | sizeof (union ib_gid)); |
| 192 | |
| 193 | if (ret < 0) |
| 194 | n = n->rb_left; |
| 195 | else if (ret > 0) |
| 196 | n = n->rb_right; |
| 197 | else |
| 198 | return path; |
| 199 | } |
| 200 | |
| 201 | return NULL; |
| 202 | } |
| 203 | |
| 204 | static int __path_add(struct net_device *dev, struct ipoib_path *path) |
| 205 | { |
| 206 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 207 | struct rb_node **n = &priv->path_tree.rb_node; |
| 208 | struct rb_node *pn = NULL; |
| 209 | struct ipoib_path *tpath; |
| 210 | int ret; |
| 211 | |
| 212 | while (*n) { |
| 213 | pn = *n; |
| 214 | tpath = rb_entry(pn, struct ipoib_path, rb_node); |
| 215 | |
| 216 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, |
| 217 | sizeof (union ib_gid)); |
| 218 | if (ret < 0) |
| 219 | n = &pn->rb_left; |
| 220 | else if (ret > 0) |
| 221 | n = &pn->rb_right; |
| 222 | else |
| 223 | return -EEXIST; |
| 224 | } |
| 225 | |
| 226 | rb_link_node(&path->rb_node, pn, n); |
| 227 | rb_insert_color(&path->rb_node, &priv->path_tree); |
| 228 | |
| 229 | list_add_tail(&path->list, &priv->path_list); |
| 230 | |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static void path_free(struct net_device *dev, struct ipoib_path *path) |
| 235 | { |
| 236 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 237 | struct ipoib_neigh *neigh, *tn; |
| 238 | struct sk_buff *skb; |
| 239 | unsigned long flags; |
| 240 | |
| 241 | while ((skb = __skb_dequeue(&path->queue))) |
| 242 | dev_kfree_skb_irq(skb); |
| 243 | |
| 244 | spin_lock_irqsave(&priv->lock, flags); |
| 245 | |
| 246 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
| 247 | /* |
| 248 | * It's safe to call ipoib_put_ah() inside priv->lock |
| 249 | * here, because we know that path->ah will always |
| 250 | * hold one more reference, so ipoib_put_ah() will |
| 251 | * never do more than decrement the ref count. |
| 252 | */ |
| 253 | if (neigh->ah) |
| 254 | ipoib_put_ah(neigh->ah); |
| 255 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | kfree(neigh); |
| 257 | } |
| 258 | |
| 259 | spin_unlock_irqrestore(&priv->lock, flags); |
| 260 | |
| 261 | if (path->ah) |
| 262 | ipoib_put_ah(path->ah); |
| 263 | |
| 264 | kfree(path); |
| 265 | } |
| 266 | |
Roland Dreier | 1732b0e | 2005-11-07 10:33:11 -0800 | [diff] [blame] | 267 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
| 268 | |
| 269 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) |
| 270 | { |
| 271 | struct ipoib_path_iter *iter; |
| 272 | |
| 273 | iter = kmalloc(sizeof *iter, GFP_KERNEL); |
| 274 | if (!iter) |
| 275 | return NULL; |
| 276 | |
| 277 | iter->dev = dev; |
| 278 | memset(iter->path.pathrec.dgid.raw, 0, 16); |
| 279 | |
| 280 | if (ipoib_path_iter_next(iter)) { |
| 281 | kfree(iter); |
| 282 | return NULL; |
| 283 | } |
| 284 | |
| 285 | return iter; |
| 286 | } |
| 287 | |
| 288 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) |
| 289 | { |
| 290 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); |
| 291 | struct rb_node *n; |
| 292 | struct ipoib_path *path; |
| 293 | int ret = 1; |
| 294 | |
| 295 | spin_lock_irq(&priv->lock); |
| 296 | |
| 297 | n = rb_first(&priv->path_tree); |
| 298 | |
| 299 | while (n) { |
| 300 | path = rb_entry(n, struct ipoib_path, rb_node); |
| 301 | |
| 302 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, |
| 303 | sizeof (union ib_gid)) < 0) { |
| 304 | iter->path = *path; |
| 305 | ret = 0; |
| 306 | break; |
| 307 | } |
| 308 | |
| 309 | n = rb_next(n); |
| 310 | } |
| 311 | |
| 312 | spin_unlock_irq(&priv->lock); |
| 313 | |
| 314 | return ret; |
| 315 | } |
| 316 | |
| 317 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, |
| 318 | struct ipoib_path *path) |
| 319 | { |
| 320 | *path = iter->path; |
| 321 | } |
| 322 | |
| 323 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |
| 324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | void ipoib_flush_paths(struct net_device *dev) |
| 326 | { |
| 327 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 328 | struct ipoib_path *path, *tp; |
| 329 | LIST_HEAD(remove_list); |
| 330 | unsigned long flags; |
| 331 | |
| 332 | spin_lock_irqsave(&priv->lock, flags); |
| 333 | |
| 334 | list_splice(&priv->path_list, &remove_list); |
| 335 | INIT_LIST_HEAD(&priv->path_list); |
| 336 | |
| 337 | list_for_each_entry(path, &remove_list, list) |
| 338 | rb_erase(&path->rb_node, &priv->path_tree); |
| 339 | |
| 340 | spin_unlock_irqrestore(&priv->lock, flags); |
| 341 | |
| 342 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
| 343 | if (path->query) |
| 344 | ib_sa_cancel_query(path->query_id, path->query); |
| 345 | wait_for_completion(&path->done); |
| 346 | path_free(dev, path); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | static void path_rec_completion(int status, |
| 351 | struct ib_sa_path_rec *pathrec, |
| 352 | void *path_ptr) |
| 353 | { |
| 354 | struct ipoib_path *path = path_ptr; |
| 355 | struct net_device *dev = path->dev; |
| 356 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 357 | struct ipoib_ah *ah = NULL; |
| 358 | struct ipoib_neigh *neigh; |
| 359 | struct sk_buff_head skqueue; |
| 360 | struct sk_buff *skb; |
| 361 | unsigned long flags; |
| 362 | |
| 363 | if (pathrec) |
| 364 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", |
| 365 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); |
| 366 | else |
| 367 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", |
| 368 | status, IPOIB_GID_ARG(path->pathrec.dgid)); |
| 369 | |
| 370 | skb_queue_head_init(&skqueue); |
| 371 | |
| 372 | if (!status) { |
| 373 | struct ib_ah_attr av = { |
| 374 | .dlid = be16_to_cpu(pathrec->dlid), |
| 375 | .sl = pathrec->sl, |
| 376 | .port_num = priv->port |
| 377 | }; |
Roland Dreier | e6ded99 | 2005-04-16 15:26:06 -0700 | [diff] [blame] | 378 | int path_rate = ib_sa_rate_enum_to_int(pathrec->rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Roland Dreier | e6ded99 | 2005-04-16 15:26:06 -0700 | [diff] [blame] | 380 | if (path_rate > 0 && priv->local_rate > path_rate) |
| 381 | av.static_rate = (priv->local_rate - 1) / path_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n", |
| 384 | av.static_rate, priv->local_rate, |
| 385 | ib_sa_rate_enum_to_int(pathrec->rate)); |
| 386 | |
| 387 | ah = ipoib_create_ah(dev, priv->pd, &av); |
| 388 | } |
| 389 | |
| 390 | spin_lock_irqsave(&priv->lock, flags); |
| 391 | |
| 392 | path->ah = ah; |
| 393 | |
| 394 | if (ah) { |
| 395 | path->pathrec = *pathrec; |
| 396 | |
| 397 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
| 398 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); |
| 399 | |
| 400 | while ((skb = __skb_dequeue(&path->queue))) |
| 401 | __skb_queue_tail(&skqueue, skb); |
| 402 | |
| 403 | list_for_each_entry(neigh, &path->neigh_list, list) { |
| 404 | kref_get(&path->ah->ref); |
| 405 | neigh->ah = path->ah; |
| 406 | |
| 407 | while ((skb = __skb_dequeue(&neigh->queue))) |
| 408 | __skb_queue_tail(&skqueue, skb); |
| 409 | } |
Roland Dreier | 5872a9f | 2005-11-29 10:13:54 -0800 | [diff] [blame] | 410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Roland Dreier | 5872a9f | 2005-11-29 10:13:54 -0800 | [diff] [blame] | 412 | path->query = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | complete(&path->done); |
| 414 | |
| 415 | spin_unlock_irqrestore(&priv->lock, flags); |
| 416 | |
| 417 | while ((skb = __skb_dequeue(&skqueue))) { |
| 418 | skb->dev = dev; |
| 419 | if (dev_queue_xmit(skb)) |
| 420 | ipoib_warn(priv, "dev_queue_xmit failed " |
| 421 | "to requeue packet\n"); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | static struct ipoib_path *path_rec_create(struct net_device *dev, |
| 426 | union ib_gid *gid) |
| 427 | { |
| 428 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 429 | struct ipoib_path *path; |
| 430 | |
Roland Dreier | 21a3848 | 2005-11-02 10:07:59 -0800 | [diff] [blame] | 431 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | if (!path) |
| 433 | return NULL; |
| 434 | |
Roland Dreier | 21a3848 | 2005-11-02 10:07:59 -0800 | [diff] [blame] | 435 | path->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
| 437 | skb_queue_head_init(&path->queue); |
| 438 | |
| 439 | INIT_LIST_HEAD(&path->neigh_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid)); |
| 442 | path->pathrec.sgid = priv->local_gid; |
| 443 | path->pathrec.pkey = cpu_to_be16(priv->pkey); |
| 444 | path->pathrec.numb_path = 1; |
| 445 | |
| 446 | return path; |
| 447 | } |
| 448 | |
| 449 | static int path_rec_start(struct net_device *dev, |
| 450 | struct ipoib_path *path) |
| 451 | { |
| 452 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 453 | |
| 454 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", |
| 455 | IPOIB_GID_ARG(path->pathrec.dgid)); |
| 456 | |
Roland Dreier | 65c7edd | 2005-11-28 21:20:34 -0800 | [diff] [blame] | 457 | init_completion(&path->done); |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | path->query_id = |
| 460 | ib_sa_path_rec_get(priv->ca, priv->port, |
| 461 | &path->pathrec, |
| 462 | IB_SA_PATH_REC_DGID | |
| 463 | IB_SA_PATH_REC_SGID | |
| 464 | IB_SA_PATH_REC_NUMB_PATH | |
| 465 | IB_SA_PATH_REC_PKEY, |
| 466 | 1000, GFP_ATOMIC, |
| 467 | path_rec_completion, |
| 468 | path, &path->query); |
| 469 | if (path->query_id < 0) { |
| 470 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); |
| 471 | path->query = NULL; |
| 472 | return path->query_id; |
| 473 | } |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) |
| 479 | { |
| 480 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 481 | struct ipoib_path *path; |
| 482 | struct ipoib_neigh *neigh; |
| 483 | |
| 484 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); |
| 485 | if (!neigh) { |
| 486 | ++priv->stats.tx_dropped; |
| 487 | dev_kfree_skb_any(skb); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | skb_queue_head_init(&neigh->queue); |
| 492 | neigh->neighbour = skb->dst->neighbour; |
| 493 | *to_ipoib_neigh(skb->dst->neighbour) = neigh; |
| 494 | |
| 495 | /* |
| 496 | * We can only be called from ipoib_start_xmit, so we're |
| 497 | * inside tx_lock -- no need to save/restore flags. |
| 498 | */ |
| 499 | spin_lock(&priv->lock); |
| 500 | |
| 501 | path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4)); |
| 502 | if (!path) { |
| 503 | path = path_rec_create(dev, |
| 504 | (union ib_gid *) (skb->dst->neighbour->ha + 4)); |
| 505 | if (!path) |
| 506 | goto err; |
| 507 | |
| 508 | __path_add(dev, path); |
| 509 | } |
| 510 | |
| 511 | list_add_tail(&neigh->list, &path->neigh_list); |
| 512 | |
Michael S. Tsirkin | 47f7a07 | 2006-01-17 09:22:05 -0800 | [diff] [blame] | 513 | if (path->ah) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | kref_get(&path->ah->ref); |
| 515 | neigh->ah = path->ah; |
| 516 | |
| 517 | ipoib_send(dev, skb, path->ah, |
| 518 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); |
| 519 | } else { |
| 520 | neigh->ah = NULL; |
Roland Dreier | bfef73f | 2006-03-20 10:08:26 -0800 | [diff] [blame] | 521 | __skb_queue_tail(&neigh->queue, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | if (!path->query && path_rec_start(dev, path)) |
| 524 | goto err; |
| 525 | } |
| 526 | |
| 527 | spin_unlock(&priv->lock); |
| 528 | return; |
| 529 | |
| 530 | err: |
| 531 | *to_ipoib_neigh(skb->dst->neighbour) = NULL; |
| 532 | list_del(&neigh->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | kfree(neigh); |
| 534 | |
| 535 | ++priv->stats.tx_dropped; |
| 536 | dev_kfree_skb_any(skb); |
| 537 | |
| 538 | spin_unlock(&priv->lock); |
| 539 | } |
| 540 | |
Roland Dreier | d70ed60 | 2005-09-28 19:56:57 -0700 | [diff] [blame] | 541 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
| 543 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); |
| 544 | |
| 545 | /* Look up path record for unicasts */ |
| 546 | if (skb->dst->neighbour->ha[4] != 0xff) { |
| 547 | neigh_add_path(skb, dev); |
| 548 | return; |
| 549 | } |
| 550 | |
| 551 | /* Add in the P_Key for multicasts */ |
| 552 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; |
| 553 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; |
| 554 | ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb); |
| 555 | } |
| 556 | |
| 557 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, |
| 558 | struct ipoib_pseudoheader *phdr) |
| 559 | { |
| 560 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 561 | struct ipoib_path *path; |
| 562 | |
| 563 | /* |
| 564 | * We can only be called from ipoib_start_xmit, so we're |
| 565 | * inside tx_lock -- no need to save/restore flags. |
| 566 | */ |
| 567 | spin_lock(&priv->lock); |
| 568 | |
| 569 | path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4)); |
| 570 | if (!path) { |
| 571 | path = path_rec_create(dev, |
| 572 | (union ib_gid *) (phdr->hwaddr + 4)); |
| 573 | if (path) { |
| 574 | /* put pseudoheader back on for next time */ |
| 575 | skb_push(skb, sizeof *phdr); |
| 576 | __skb_queue_tail(&path->queue, skb); |
| 577 | |
| 578 | if (path_rec_start(dev, path)) { |
| 579 | spin_unlock(&priv->lock); |
| 580 | path_free(dev, path); |
| 581 | return; |
| 582 | } else |
| 583 | __path_add(dev, path); |
| 584 | } else { |
| 585 | ++priv->stats.tx_dropped; |
| 586 | dev_kfree_skb_any(skb); |
| 587 | } |
| 588 | |
| 589 | spin_unlock(&priv->lock); |
| 590 | return; |
| 591 | } |
| 592 | |
Michael S. Tsirkin | 47f7a07 | 2006-01-17 09:22:05 -0800 | [diff] [blame] | 593 | if (path->ah) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
| 595 | be16_to_cpu(path->pathrec.dlid)); |
| 596 | |
| 597 | ipoib_send(dev, skb, path->ah, |
| 598 | be32_to_cpup((__be32 *) phdr->hwaddr)); |
| 599 | } else if ((path->query || !path_rec_start(dev, path)) && |
| 600 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| 601 | /* put pseudoheader back on for next time */ |
| 602 | skb_push(skb, sizeof *phdr); |
| 603 | __skb_queue_tail(&path->queue, skb); |
| 604 | } else { |
| 605 | ++priv->stats.tx_dropped; |
| 606 | dev_kfree_skb_any(skb); |
| 607 | } |
| 608 | |
| 609 | spin_unlock(&priv->lock); |
| 610 | } |
| 611 | |
| 612 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 613 | { |
| 614 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 615 | struct ipoib_neigh *neigh; |
| 616 | unsigned long flags; |
| 617 | |
Roland Dreier | a20583a | 2005-10-29 13:54:40 -0700 | [diff] [blame] | 618 | if (!spin_trylock_irqsave(&priv->tx_lock, flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | return NETDEV_TX_LOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
| 621 | /* |
| 622 | * Check if our queue is stopped. Since we have the LLTX bit |
| 623 | * set, we can't rely on netif_stop_queue() preventing our |
| 624 | * xmit function from being called with a full queue. |
| 625 | */ |
| 626 | if (unlikely(netif_queue_stopped(dev))) { |
| 627 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 628 | return NETDEV_TX_BUSY; |
| 629 | } |
| 630 | |
| 631 | if (skb->dst && skb->dst->neighbour) { |
| 632 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
Roland Dreier | d70ed60 | 2005-09-28 19:56:57 -0700 | [diff] [blame] | 633 | ipoib_path_lookup(skb, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | goto out; |
| 635 | } |
| 636 | |
| 637 | neigh = *to_ipoib_neigh(skb->dst->neighbour); |
| 638 | |
| 639 | if (likely(neigh->ah)) { |
| 640 | ipoib_send(dev, skb, neigh->ah, |
| 641 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); |
| 642 | goto out; |
| 643 | } |
| 644 | |
| 645 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| 646 | spin_lock(&priv->lock); |
| 647 | __skb_queue_tail(&neigh->queue, skb); |
| 648 | spin_unlock(&priv->lock); |
| 649 | } else { |
| 650 | ++priv->stats.tx_dropped; |
| 651 | dev_kfree_skb_any(skb); |
| 652 | } |
| 653 | } else { |
| 654 | struct ipoib_pseudoheader *phdr = |
| 655 | (struct ipoib_pseudoheader *) skb->data; |
| 656 | skb_pull(skb, sizeof *phdr); |
| 657 | |
| 658 | if (phdr->hwaddr[4] == 0xff) { |
| 659 | /* Add in the P_Key for multicast*/ |
| 660 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; |
| 661 | phdr->hwaddr[9] = priv->pkey & 0xff; |
| 662 | |
| 663 | ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb); |
| 664 | } else { |
Hal Rosenstock | 0dca0f7 | 2005-07-28 13:17:26 -0700 | [diff] [blame] | 665 | /* unicast GID -- should be ARP or RARP reply */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Hal Rosenstock | 0dca0f7 | 2005-07-28 13:17:26 -0700 | [diff] [blame] | 667 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
| 668 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
| 670 | IPOIB_GID_FMT "\n", |
| 671 | skb->dst ? "neigh" : "dst", |
Sean Hefty | 97f52eb | 2005-08-13 21:05:57 -0700 | [diff] [blame] | 672 | be16_to_cpup((__be16 *) skb->data), |
| 673 | be32_to_cpup((__be32 *) phdr->hwaddr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4))); |
| 675 | dev_kfree_skb_any(skb); |
| 676 | ++priv->stats.tx_dropped; |
| 677 | goto out; |
| 678 | } |
| 679 | |
| 680 | unicast_arp_send(skb, dev, phdr); |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | out: |
| 685 | spin_unlock_irqrestore(&priv->tx_lock, flags); |
| 686 | |
| 687 | return NETDEV_TX_OK; |
| 688 | } |
| 689 | |
| 690 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) |
| 691 | { |
| 692 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 693 | |
| 694 | return &priv->stats; |
| 695 | } |
| 696 | |
| 697 | static void ipoib_timeout(struct net_device *dev) |
| 698 | { |
| 699 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 700 | |
Roland Dreier | 4b2d319 | 2005-10-18 12:20:06 -0700 | [diff] [blame] | 701 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
| 702 | jiffies_to_msecs(jiffies - dev->trans_start)); |
| 703 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", |
| 704 | netif_queue_stopped(dev), |
| 705 | priv->tx_head, priv->tx_tail); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | /* XXX reset QP, etc. */ |
| 707 | } |
| 708 | |
| 709 | static int ipoib_hard_header(struct sk_buff *skb, |
| 710 | struct net_device *dev, |
| 711 | unsigned short type, |
| 712 | void *daddr, void *saddr, unsigned len) |
| 713 | { |
| 714 | struct ipoib_header *header; |
| 715 | |
| 716 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); |
| 717 | |
| 718 | header->proto = htons(type); |
| 719 | header->reserved = 0; |
| 720 | |
| 721 | /* |
| 722 | * If we don't have a neighbour structure, stuff the |
| 723 | * destination address onto the front of the skb so we can |
| 724 | * figure out where to send the packet later. |
| 725 | */ |
Roland Dreier | ef12d45 | 2006-03-29 09:36:46 -0800 | [diff] [blame] | 726 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | struct ipoib_pseudoheader *phdr = |
| 728 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); |
| 729 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); |
| 730 | } |
| 731 | |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | static void ipoib_set_mcast_list(struct net_device *dev) |
| 736 | { |
| 737 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 738 | |
Leonid Arsh | 7a343d4 | 2006-03-23 19:52:51 +0200 | [diff] [blame] | 739 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
| 740 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); |
| 741 | return; |
| 742 | } |
| 743 | |
Michael S. Tsirkin | 1ad62a1 | 2005-08-24 14:41:51 -0700 | [diff] [blame] | 744 | queue_work(ipoib_workqueue, &priv->restart_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | static void ipoib_neigh_destructor(struct neighbour *n) |
| 748 | { |
| 749 | struct ipoib_neigh *neigh; |
| 750 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); |
| 751 | unsigned long flags; |
| 752 | struct ipoib_ah *ah = NULL; |
| 753 | |
| 754 | ipoib_dbg(priv, |
| 755 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", |
| 756 | be32_to_cpup((__be32 *) n->ha), |
| 757 | IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4)))); |
| 758 | |
| 759 | spin_lock_irqsave(&priv->lock, flags); |
| 760 | |
| 761 | neigh = *to_ipoib_neigh(n); |
| 762 | if (neigh) { |
| 763 | if (neigh->ah) |
| 764 | ah = neigh->ah; |
| 765 | list_del(&neigh->list); |
| 766 | *to_ipoib_neigh(n) = NULL; |
| 767 | kfree(neigh); |
| 768 | } |
| 769 | |
| 770 | spin_unlock_irqrestore(&priv->lock, flags); |
| 771 | |
| 772 | if (ah) |
| 773 | ipoib_put_ah(ah); |
| 774 | } |
| 775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
| 777 | { |
Michael S. Tsirkin | c5ecd62 | 2006-03-20 22:25:41 -0800 | [diff] [blame] | 778 | parms->neigh_destructor = ipoib_neigh_destructor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | return 0; |
| 781 | } |
| 782 | |
| 783 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
| 784 | { |
| 785 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 786 | |
| 787 | /* Allocate RX/TX "rings" to hold queued skbs */ |
| 788 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 789 | priv->rx_ring = kzalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_rx_buf), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | GFP_KERNEL); |
| 791 | if (!priv->rx_ring) { |
| 792 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", |
| 793 | ca->name, IPOIB_RX_RING_SIZE); |
| 794 | goto out; |
| 795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 797 | priv->tx_ring = kzalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_tx_buf), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | GFP_KERNEL); |
| 799 | if (!priv->tx_ring) { |
| 800 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", |
| 801 | ca->name, IPOIB_TX_RING_SIZE); |
| 802 | goto out_rx_ring_cleanup; |
| 803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
| 805 | /* priv->tx_head & tx_tail are already 0 */ |
| 806 | |
| 807 | if (ipoib_ib_dev_init(dev, ca, port)) |
| 808 | goto out_tx_ring_cleanup; |
| 809 | |
| 810 | return 0; |
| 811 | |
| 812 | out_tx_ring_cleanup: |
| 813 | kfree(priv->tx_ring); |
| 814 | |
| 815 | out_rx_ring_cleanup: |
| 816 | kfree(priv->rx_ring); |
| 817 | |
| 818 | out: |
| 819 | return -ENOMEM; |
| 820 | } |
| 821 | |
| 822 | void ipoib_dev_cleanup(struct net_device *dev) |
| 823 | { |
| 824 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; |
| 825 | |
Roland Dreier | 1732b0e | 2005-11-07 10:33:11 -0800 | [diff] [blame] | 826 | ipoib_delete_debug_files(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
| 828 | /* Delete any child interfaces first */ |
| 829 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { |
| 830 | unregister_netdev(cpriv->dev); |
| 831 | ipoib_dev_cleanup(cpriv->dev); |
| 832 | free_netdev(cpriv->dev); |
| 833 | } |
| 834 | |
| 835 | ipoib_ib_dev_cleanup(dev); |
| 836 | |
Hal Rosenstock | 92a6b34 | 2005-08-13 20:50:27 -0700 | [diff] [blame] | 837 | kfree(priv->rx_ring); |
| 838 | kfree(priv->tx_ring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Hal Rosenstock | 92a6b34 | 2005-08-13 20:50:27 -0700 | [diff] [blame] | 840 | priv->rx_ring = NULL; |
| 841 | priv->tx_ring = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | static void ipoib_setup(struct net_device *dev) |
| 845 | { |
| 846 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
| 847 | |
| 848 | dev->open = ipoib_open; |
| 849 | dev->stop = ipoib_stop; |
| 850 | dev->change_mtu = ipoib_change_mtu; |
| 851 | dev->hard_start_xmit = ipoib_start_xmit; |
| 852 | dev->get_stats = ipoib_get_stats; |
| 853 | dev->tx_timeout = ipoib_timeout; |
| 854 | dev->hard_header = ipoib_hard_header; |
| 855 | dev->set_multicast_list = ipoib_set_mcast_list; |
| 856 | dev->neigh_setup = ipoib_neigh_setup_dev; |
| 857 | |
| 858 | dev->watchdog_timeo = HZ; |
| 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
| 861 | |
| 862 | /* |
| 863 | * We add in INFINIBAND_ALEN to allow for the destination |
| 864 | * address "pseudoheader" for skbs without neighbour struct. |
| 865 | */ |
| 866 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; |
| 867 | dev->addr_len = INFINIBAND_ALEN; |
| 868 | dev->type = ARPHRD_INFINIBAND; |
| 869 | dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2; |
| 870 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
| 871 | |
| 872 | /* MTU will be reset when mcast join happens */ |
| 873 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; |
| 874 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; |
| 875 | |
| 876 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
| 877 | |
| 878 | netif_carrier_off(dev); |
| 879 | |
| 880 | SET_MODULE_OWNER(dev); |
| 881 | |
| 882 | priv->dev = dev; |
| 883 | |
| 884 | spin_lock_init(&priv->lock); |
| 885 | spin_lock_init(&priv->tx_lock); |
| 886 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 887 | mutex_init(&priv->mcast_mutex); |
| 888 | mutex_init(&priv->vlan_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
| 890 | INIT_LIST_HEAD(&priv->path_list); |
| 891 | INIT_LIST_HEAD(&priv->child_intfs); |
| 892 | INIT_LIST_HEAD(&priv->dead_ahs); |
| 893 | INIT_LIST_HEAD(&priv->multicast_list); |
| 894 | |
| 895 | INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev); |
| 896 | INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev); |
| 897 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev); |
| 898 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev); |
| 899 | INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev); |
| 900 | } |
| 901 | |
| 902 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) |
| 903 | { |
| 904 | struct net_device *dev; |
| 905 | |
| 906 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, |
| 907 | ipoib_setup); |
| 908 | if (!dev) |
| 909 | return NULL; |
| 910 | |
| 911 | return netdev_priv(dev); |
| 912 | } |
| 913 | |
| 914 | static ssize_t show_pkey(struct class_device *cdev, char *buf) |
| 915 | { |
| 916 | struct ipoib_dev_priv *priv = |
| 917 | netdev_priv(container_of(cdev, struct net_device, class_dev)); |
| 918 | |
| 919 | return sprintf(buf, "0x%04x\n", priv->pkey); |
| 920 | } |
| 921 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
| 922 | |
| 923 | static ssize_t create_child(struct class_device *cdev, |
| 924 | const char *buf, size_t count) |
| 925 | { |
| 926 | int pkey; |
| 927 | int ret; |
| 928 | |
| 929 | if (sscanf(buf, "%i", &pkey) != 1) |
| 930 | return -EINVAL; |
| 931 | |
| 932 | if (pkey < 0 || pkey > 0xffff) |
| 933 | return -EINVAL; |
| 934 | |
Roland Dreier | 4ce0593 | 2005-08-19 12:03:17 -0700 | [diff] [blame] | 935 | /* |
| 936 | * Set the full membership bit, so that we join the right |
| 937 | * broadcast group, etc. |
| 938 | */ |
| 939 | pkey |= 0x8000; |
| 940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev), |
| 942 | pkey); |
| 943 | |
| 944 | return ret ? ret : count; |
| 945 | } |
| 946 | static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); |
| 947 | |
| 948 | static ssize_t delete_child(struct class_device *cdev, |
| 949 | const char *buf, size_t count) |
| 950 | { |
| 951 | int pkey; |
| 952 | int ret; |
| 953 | |
| 954 | if (sscanf(buf, "%i", &pkey) != 1) |
| 955 | return -EINVAL; |
| 956 | |
| 957 | if (pkey < 0 || pkey > 0xffff) |
| 958 | return -EINVAL; |
| 959 | |
| 960 | ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev), |
| 961 | pkey); |
| 962 | |
| 963 | return ret ? ret : count; |
| 964 | |
| 965 | } |
| 966 | static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); |
| 967 | |
| 968 | int ipoib_add_pkey_attr(struct net_device *dev) |
| 969 | { |
| 970 | return class_device_create_file(&dev->class_dev, |
| 971 | &class_device_attr_pkey); |
| 972 | } |
| 973 | |
| 974 | static struct net_device *ipoib_add_port(const char *format, |
| 975 | struct ib_device *hca, u8 port) |
| 976 | { |
| 977 | struct ipoib_dev_priv *priv; |
| 978 | int result = -ENOMEM; |
| 979 | |
| 980 | priv = ipoib_intf_alloc(format); |
| 981 | if (!priv) |
| 982 | goto alloc_mem_failed; |
| 983 | |
| 984 | SET_NETDEV_DEV(priv->dev, hca->dma_device); |
| 985 | |
| 986 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
| 987 | if (result) { |
| 988 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", |
| 989 | hca->name, port, result); |
| 990 | goto alloc_mem_failed; |
| 991 | } |
| 992 | |
Roland Dreier | 4ce0593 | 2005-08-19 12:03:17 -0700 | [diff] [blame] | 993 | /* |
| 994 | * Set the full membership bit, so that we join the right |
| 995 | * broadcast group, etc. |
| 996 | */ |
| 997 | priv->pkey |= 0x8000; |
| 998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | priv->dev->broadcast[8] = priv->pkey >> 8; |
| 1000 | priv->dev->broadcast[9] = priv->pkey & 0xff; |
| 1001 | |
| 1002 | result = ib_query_gid(hca, port, 0, &priv->local_gid); |
| 1003 | if (result) { |
| 1004 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", |
| 1005 | hca->name, port, result); |
| 1006 | goto alloc_mem_failed; |
| 1007 | } else |
| 1008 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); |
| 1009 | |
| 1010 | |
| 1011 | result = ipoib_dev_init(priv->dev, hca, port); |
| 1012 | if (result < 0) { |
| 1013 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", |
| 1014 | hca->name, port, result); |
| 1015 | goto device_init_failed; |
| 1016 | } |
| 1017 | |
| 1018 | INIT_IB_EVENT_HANDLER(&priv->event_handler, |
| 1019 | priv->ca, ipoib_event); |
| 1020 | result = ib_register_event_handler(&priv->event_handler); |
| 1021 | if (result < 0) { |
| 1022 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " |
| 1023 | "port %d (ret = %d)\n", |
| 1024 | hca->name, port, result); |
| 1025 | goto event_failed; |
| 1026 | } |
| 1027 | |
| 1028 | result = register_netdev(priv->dev); |
| 1029 | if (result) { |
| 1030 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", |
| 1031 | hca->name, port, result); |
| 1032 | goto register_failed; |
| 1033 | } |
| 1034 | |
Roland Dreier | 1732b0e | 2005-11-07 10:33:11 -0800 | [diff] [blame] | 1035 | ipoib_create_debug_files(priv->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
| 1037 | if (ipoib_add_pkey_attr(priv->dev)) |
| 1038 | goto sysfs_failed; |
| 1039 | if (class_device_create_file(&priv->dev->class_dev, |
| 1040 | &class_device_attr_create_child)) |
| 1041 | goto sysfs_failed; |
| 1042 | if (class_device_create_file(&priv->dev->class_dev, |
| 1043 | &class_device_attr_delete_child)) |
| 1044 | goto sysfs_failed; |
| 1045 | |
| 1046 | return priv->dev; |
| 1047 | |
| 1048 | sysfs_failed: |
Roland Dreier | 1732b0e | 2005-11-07 10:33:11 -0800 | [diff] [blame] | 1049 | ipoib_delete_debug_files(priv->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | unregister_netdev(priv->dev); |
| 1051 | |
| 1052 | register_failed: |
| 1053 | ib_unregister_event_handler(&priv->event_handler); |
Michael S. Tsirkin | 51574e0 | 2005-09-12 09:52:28 -0700 | [diff] [blame] | 1054 | flush_scheduled_work(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
| 1056 | event_failed: |
| 1057 | ipoib_dev_cleanup(priv->dev); |
| 1058 | |
| 1059 | device_init_failed: |
| 1060 | free_netdev(priv->dev); |
| 1061 | |
| 1062 | alloc_mem_failed: |
| 1063 | return ERR_PTR(result); |
| 1064 | } |
| 1065 | |
| 1066 | static void ipoib_add_one(struct ib_device *device) |
| 1067 | { |
| 1068 | struct list_head *dev_list; |
| 1069 | struct net_device *dev; |
| 1070 | struct ipoib_dev_priv *priv; |
| 1071 | int s, e, p; |
| 1072 | |
| 1073 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
| 1074 | if (!dev_list) |
| 1075 | return; |
| 1076 | |
| 1077 | INIT_LIST_HEAD(dev_list); |
| 1078 | |
| 1079 | if (device->node_type == IB_NODE_SWITCH) { |
| 1080 | s = 0; |
| 1081 | e = 0; |
| 1082 | } else { |
| 1083 | s = 1; |
| 1084 | e = device->phys_port_cnt; |
| 1085 | } |
| 1086 | |
| 1087 | for (p = s; p <= e; ++p) { |
| 1088 | dev = ipoib_add_port("ib%d", device, p); |
| 1089 | if (!IS_ERR(dev)) { |
| 1090 | priv = netdev_priv(dev); |
| 1091 | list_add_tail(&priv->list, dev_list); |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | ib_set_client_data(device, &ipoib_client, dev_list); |
| 1096 | } |
| 1097 | |
| 1098 | static void ipoib_remove_one(struct ib_device *device) |
| 1099 | { |
| 1100 | struct ipoib_dev_priv *priv, *tmp; |
| 1101 | struct list_head *dev_list; |
| 1102 | |
| 1103 | dev_list = ib_get_client_data(device, &ipoib_client); |
| 1104 | |
| 1105 | list_for_each_entry_safe(priv, tmp, dev_list, list) { |
| 1106 | ib_unregister_event_handler(&priv->event_handler); |
Michael S. Tsirkin | 51574e0 | 2005-09-12 09:52:28 -0700 | [diff] [blame] | 1107 | flush_scheduled_work(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | |
| 1109 | unregister_netdev(priv->dev); |
| 1110 | ipoib_dev_cleanup(priv->dev); |
| 1111 | free_netdev(priv->dev); |
| 1112 | } |
Michael S. Tsirkin | 06c56e4 | 2005-09-01 09:19:02 -0700 | [diff] [blame] | 1113 | |
| 1114 | kfree(dev_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | } |
| 1116 | |
| 1117 | static int __init ipoib_init_module(void) |
| 1118 | { |
| 1119 | int ret; |
| 1120 | |
| 1121 | ret = ipoib_register_debugfs(); |
| 1122 | if (ret) |
| 1123 | return ret; |
| 1124 | |
| 1125 | /* |
| 1126 | * We create our own workqueue mainly because we want to be |
| 1127 | * able to flush it when devices are being removed. We can't |
| 1128 | * use schedule_work()/flush_scheduled_work() because both |
| 1129 | * unregister_netdev() and linkwatch_event take the rtnl lock, |
| 1130 | * so flush_scheduled_work() can deadlock during device |
| 1131 | * removal. |
| 1132 | */ |
| 1133 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); |
| 1134 | if (!ipoib_workqueue) { |
| 1135 | ret = -ENOMEM; |
| 1136 | goto err_fs; |
| 1137 | } |
| 1138 | |
| 1139 | ret = ib_register_client(&ipoib_client); |
| 1140 | if (ret) |
| 1141 | goto err_wq; |
| 1142 | |
| 1143 | return 0; |
| 1144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | err_wq: |
| 1146 | destroy_workqueue(ipoib_workqueue); |
| 1147 | |
Roland Dreier | 9adec1a | 2005-04-16 15:26:07 -0700 | [diff] [blame] | 1148 | err_fs: |
| 1149 | ipoib_unregister_debugfs(); |
| 1150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | return ret; |
| 1152 | } |
| 1153 | |
| 1154 | static void __exit ipoib_cleanup_module(void) |
| 1155 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | ib_unregister_client(&ipoib_client); |
Roland Dreier | 9adec1a | 2005-04-16 15:26:07 -0700 | [diff] [blame] | 1157 | ipoib_unregister_debugfs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | destroy_workqueue(ipoib_workqueue); |
| 1159 | } |
| 1160 | |
| 1161 | module_init(ipoib_init_module); |
| 1162 | module_exit(ipoib_cleanup_module); |