Pileus Git - ~andy/linux/blob - drivers/infiniband/hw/ocrdma/ocrdma_main.c

   1 /*******************************************************************
   2  * This file is part of the Emulex RoCE Device Driver for          *
   3  * RoCE (RDMA over Converged Ethernet) adapters.                   *
   4  * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  *                                                                 *
   8  * This program is free software; you can redistribute it and/or   *
   9  * modify it under the terms of version 2 of the GNU General       *
  10  * Public License as published by the Free Software Foundation.    *
  11  * This program is distributed in the hope that it will be useful. *
  12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  17  * more details, a copy of which can be found in the file COPYING  *
  18  * included with this package.                                     *
  19  *
  20  * Contact Information:
  21  * linux-drivers@emulex.com
  22  *
  23  * Emulex
  24  * 3333 Susan Street
  25  * Costa Mesa, CA 92626
  26  *******************************************************************/
  27
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/idr.h>
  31 #include <rdma/ib_verbs.h>
  32 #include <rdma/ib_user_verbs.h>
  33 #include <rdma/ib_addr.h>
  34
  35 #include <linux/netdevice.h>
  36 #include <net/addrconf.h>
  37
  38 #include "ocrdma.h"
  39 #include "ocrdma_verbs.h"
  40 #include "ocrdma_ah.h"
  41 #include "be_roce.h"
  42 #include "ocrdma_hw.h"
  43
  44 MODULE_VERSION(OCRDMA_ROCE_DEV_VERSION);
  45 MODULE_DESCRIPTION("Emulex RoCE HCA Driver");
  46 MODULE_AUTHOR("Emulex Corporation");
  47 MODULE_LICENSE("GPL");
  48
  49 static LIST_HEAD(ocrdma_dev_list);
  50 static DEFINE_SPINLOCK(ocrdma_devlist_lock);
  51 static DEFINE_IDR(ocrdma_dev_id);
  52
  53 static union ib_gid ocrdma_zero_sgid;
  54
  55 static int ocrdma_get_instance(void)
  56 {
  57         int instance = 0;
  58
  59         /* Assign an unused number */
  60         if (!idr_pre_get(&ocrdma_dev_id, GFP_KERNEL))
  61                 return -1;
  62         if (idr_get_new(&ocrdma_dev_id, NULL, &instance))
  63                 return -1;
  64         return instance;
  65 }
  66
  67 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
  68 {
  69         u8 mac_addr[6];
  70
  71         memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
  72         guid[0] = mac_addr[0] ^ 2;
  73         guid[1] = mac_addr[1];
  74         guid[2] = mac_addr[2];
  75         guid[3] = 0xff;
  76         guid[4] = 0xfe;
  77         guid[5] = mac_addr[3];
  78         guid[6] = mac_addr[4];
  79         guid[7] = mac_addr[5];
  80 }
  81
  82 static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char *mac_addr,
  83                                   bool is_vlan, u16 vlan_id)
  84 {
  85         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
  86         sgid->raw[8] = mac_addr[0] ^ 2;
  87         sgid->raw[9] = mac_addr[1];
  88         sgid->raw[10] = mac_addr[2];
  89         if (is_vlan) {
  90                 sgid->raw[11] = vlan_id >> 8;
  91                 sgid->raw[12] = vlan_id & 0xff;
  92         } else {
  93                 sgid->raw[11] = 0xff;
  94                 sgid->raw[12] = 0xfe;
  95         }
  96         sgid->raw[13] = mac_addr[3];
  97         sgid->raw[14] = mac_addr[4];
  98         sgid->raw[15] = mac_addr[5];
  99 }
 100
 101 static void ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
 102                             bool is_vlan, u16 vlan_id)
 103 {
 104         int i;
 105         bool found = false;
 106         union ib_gid new_sgid;
 107         int free_idx = OCRDMA_MAX_SGID;
 108         unsigned long flags;
 109
 110         memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
 111
 112         ocrdma_build_sgid_mac(&new_sgid, mac_addr, is_vlan, vlan_id);
 113
 114         spin_lock_irqsave(&dev->sgid_lock, flags);
 115         for (i = 0; i < OCRDMA_MAX_SGID; i++) {
 116                 if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
 117                             sizeof(union ib_gid))) {
 118                         /* found free entry */
 119                         if (!found) {
 120                                 free_idx = i;
 121                                 found = true;
 122                                 break;
 123                         }
 124                 } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
 125                                    sizeof(union ib_gid))) {
 126                         /* entry already present, no addition is required. */
 127                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 128                         return;
 129                 }
 130         }
 131         /* if entry doesn't exist and if table has some space, add entry */
 132         if (found)
 133                 memcpy(&dev->sgid_tbl[free_idx], &new_sgid,
 134                        sizeof(union ib_gid));
 135         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 136 }
 137
 138 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
 139                             bool is_vlan, u16 vlan_id)
 140 {
 141         int found = false;
 142         int i;
 143         union ib_gid sgid;
 144         unsigned long flags;
 145
 146         ocrdma_build_sgid_mac(&sgid, mac_addr, is_vlan, vlan_id);
 147
 148         spin_lock_irqsave(&dev->sgid_lock, flags);
 149         /* first is default sgid, which cannot be deleted. */
 150         for (i = 1; i < OCRDMA_MAX_SGID; i++) {
 151                 if (!memcmp(&dev->sgid_tbl[i], &sgid, sizeof(union ib_gid))) {
 152                         /* found matching entry */
 153                         memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
 154                         found = true;
 155                         break;
 156                 }
 157         }
 158         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 159         return found;
 160 }
 161
 162 static void ocrdma_add_default_sgid(struct ocrdma_dev *dev)
 163 {
 164         /* GID Index 0 - Invariant manufacturer-assigned EUI-64 */
 165         union ib_gid *sgid = &dev->sgid_tbl[0];
 166
 167         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
 168         ocrdma_get_guid(dev, &sgid->raw[8]);
 169 }
 170
 171 static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
 172 {
 173         struct net_device *netdev, *tmp;
 174         u16 vlan_id;
 175         bool is_vlan;
 176
 177         netdev = dev->nic_info.netdev;
 178
 179         ocrdma_add_default_sgid(dev);
 180
 181         rcu_read_lock();
 182         for_each_netdev_rcu(&init_net, tmp) {
 183                 if (netdev == tmp || vlan_dev_real_dev(tmp) == netdev) {
 184                         if (!netif_running(tmp) || !netif_oper_up(tmp))
 185                                 continue;
 186                         if (netdev != tmp) {
 187                                 vlan_id = vlan_dev_vlan_id(tmp);
 188                                 is_vlan = true;
 189                         } else {
 190                                 is_vlan = false;
 191                                 vlan_id = 0;
 192                                 tmp = netdev;
 193                         }
 194                         ocrdma_add_sgid(dev, tmp->dev_addr, is_vlan, vlan_id);
 195                 }
 196         }
 197         rcu_read_unlock();
 198         return 0;
 199 }
 200
 201 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 202
 203 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
 204                                   unsigned long event, void *ptr)
 205 {
 206         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 207         struct net_device *event_netdev = ifa->idev->dev;
 208         struct net_device *netdev = NULL;
 209         struct ib_event gid_event;
 210         struct ocrdma_dev *dev;
 211         bool found = false;
 212         bool is_vlan = false;
 213         u16 vid = 0;
 214
 215         netdev = vlan_dev_real_dev(event_netdev);
 216         if (netdev != event_netdev) {
 217                 is_vlan = true;
 218                 vid = vlan_dev_vlan_id(event_netdev);
 219         }
 220         rcu_read_lock();
 221         list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
 222                 if (dev->nic_info.netdev == netdev) {
 223                         found = true;
 224                         break;
 225                 }
 226         }
 227         rcu_read_unlock();
 228
 229         if (!found)
 230                 return NOTIFY_DONE;
 231         if (!rdma_link_local_addr((struct in6_addr *)&ifa->addr))
 232                 return NOTIFY_DONE;
 233
 234         mutex_lock(&dev->dev_lock);
 235         switch (event) {
 236         case NETDEV_UP:
 237                 ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
 238                 break;
 239         case NETDEV_DOWN:
 240                 found = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
 241                 if (found) {
 242                         /* found the matching entry, notify
 243                          * the consumers about it
 244                          */
 245                         gid_event.device = &dev->ibdev;
 246                         gid_event.element.port_num = 1;
 247                         gid_event.event = IB_EVENT_GID_CHANGE;
 248                         ib_dispatch_event(&gid_event);
 249                 }
 250                 break;
 251         default:
 252                 break;
 253         }
 254         mutex_unlock(&dev->dev_lock);
 255         return NOTIFY_OK;
 256 }
 257
 258 static struct notifier_block ocrdma_inet6addr_notifier = {
 259         .notifier_call = ocrdma_inet6addr_event
 260 };
 261
 262 #endif /* IPV6 */
 263
 264 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
 265                                               u8 port_num)
 266 {
 267         return IB_LINK_LAYER_ETHERNET;
 268 }
 269
 270 static int ocrdma_register_device(struct ocrdma_dev *dev)
 271 {
 272         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 273         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 274         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 275                sizeof(OCRDMA_NODE_DESC));
 276         dev->ibdev.owner = THIS_MODULE;
 277         dev->ibdev.uverbs_cmd_mask =
 278             OCRDMA_UVERBS(GET_CONTEXT) |
 279             OCRDMA_UVERBS(QUERY_DEVICE) |
 280             OCRDMA_UVERBS(QUERY_PORT) |
 281             OCRDMA_UVERBS(ALLOC_PD) |
 282             OCRDMA_UVERBS(DEALLOC_PD) |
 283             OCRDMA_UVERBS(REG_MR) |
 284             OCRDMA_UVERBS(DEREG_MR) |
 285             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 286             OCRDMA_UVERBS(CREATE_CQ) |
 287             OCRDMA_UVERBS(RESIZE_CQ) |
 288             OCRDMA_UVERBS(DESTROY_CQ) |
 289             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 290             OCRDMA_UVERBS(CREATE_QP) |
 291             OCRDMA_UVERBS(MODIFY_QP) |
 292             OCRDMA_UVERBS(QUERY_QP) |
 293             OCRDMA_UVERBS(DESTROY_QP) |
 294             OCRDMA_UVERBS(POLL_CQ) |
 295             OCRDMA_UVERBS(POST_SEND) |
 296             OCRDMA_UVERBS(POST_RECV);
 297
 298         dev->ibdev.uverbs_cmd_mask |=
 299             OCRDMA_UVERBS(CREATE_AH) |
 300              OCRDMA_UVERBS(MODIFY_AH) |
 301              OCRDMA_UVERBS(QUERY_AH) |
 302              OCRDMA_UVERBS(DESTROY_AH);
 303
 304         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 305         dev->ibdev.phys_port_cnt = 1;
 306         dev->ibdev.num_comp_vectors = 1;
 307
 308         /* mandatory verbs. */
 309         dev->ibdev.query_device = ocrdma_query_device;
 310         dev->ibdev.query_port = ocrdma_query_port;
 311         dev->ibdev.modify_port = ocrdma_modify_port;
 312         dev->ibdev.query_gid = ocrdma_query_gid;
 313         dev->ibdev.get_link_layer = ocrdma_link_layer;
 314         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 315         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 316
 317         dev->ibdev.create_cq = ocrdma_create_cq;
 318         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 319         dev->ibdev.resize_cq = ocrdma_resize_cq;
 320
 321         dev->ibdev.create_qp = ocrdma_create_qp;
 322         dev->ibdev.modify_qp = ocrdma_modify_qp;
 323         dev->ibdev.query_qp = ocrdma_query_qp;
 324         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 325
 326         dev->ibdev.query_pkey = ocrdma_query_pkey;
 327         dev->ibdev.create_ah = ocrdma_create_ah;
 328         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 329         dev->ibdev.query_ah = ocrdma_query_ah;
 330         dev->ibdev.modify_ah = ocrdma_modify_ah;
 331
 332         dev->ibdev.poll_cq = ocrdma_poll_cq;
 333         dev->ibdev.post_send = ocrdma_post_send;
 334         dev->ibdev.post_recv = ocrdma_post_recv;
 335         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 336
 337         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 338         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 339         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 340
 341         /* mandatory to support user space verbs consumer. */
 342         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 343         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 344         dev->ibdev.mmap = ocrdma_mmap;
 345         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 346
 347         dev->ibdev.process_mad = ocrdma_process_mad;
 348
 349         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
 350                 dev->ibdev.uverbs_cmd_mask |=
 351                      OCRDMA_UVERBS(CREATE_SRQ) |
 352                      OCRDMA_UVERBS(MODIFY_SRQ) |
 353                      OCRDMA_UVERBS(QUERY_SRQ) |
 354                      OCRDMA_UVERBS(DESTROY_SRQ) |
 355                      OCRDMA_UVERBS(POST_SRQ_RECV);
 356
 357                 dev->ibdev.create_srq = ocrdma_create_srq;
 358                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 359                 dev->ibdev.query_srq = ocrdma_query_srq;
 360                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 361                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 362         }
 363         return ib_register_device(&dev->ibdev, NULL);
 364 }
 365
 366 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 367 {
 368         mutex_init(&dev->dev_lock);
 369         dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
 370                                 OCRDMA_MAX_SGID, GFP_KERNEL);
 371         if (!dev->sgid_tbl)
 372                 goto alloc_err;
 373         spin_lock_init(&dev->sgid_lock);
 374
 375         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 376                               OCRDMA_MAX_CQ, GFP_KERNEL);
 377         if (!dev->cq_tbl)
 378                 goto alloc_err;
 379
 380         if (dev->attr.max_qp) {
 381                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 382                                       OCRDMA_MAX_QP, GFP_KERNEL);
 383                 if (!dev->qp_tbl)
 384                         goto alloc_err;
 385         }
 386         spin_lock_init(&dev->av_tbl.lock);
 387         spin_lock_init(&dev->flush_q_lock);
 388         return 0;
 389 alloc_err:
 390         ocrdma_err("%s(%d) error.\n", __func__, dev->id);
 391         return -ENOMEM;
 392 }
 393
 394 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 395 {
 396         kfree(dev->qp_tbl);
 397         kfree(dev->cq_tbl);
 398         kfree(dev->sgid_tbl);
 399 }
 400
 401 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 402 {
 403         int status = 0;
 404         struct ocrdma_dev *dev;
 405
 406         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 407         if (!dev) {
 408                 ocrdma_err("Unable to allocate ib device\n");
 409                 return NULL;
 410         }
 411         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 412         if (!dev->mbx_cmd)
 413                 goto idr_err;
 414
 415         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 416         dev->id = ocrdma_get_instance();
 417         if (dev->id < 0)
 418                 goto idr_err;
 419
 420         status = ocrdma_init_hw(dev);
 421         if (status)
 422                 goto init_err;
 423
 424         status = ocrdma_alloc_resources(dev);
 425         if (status)
 426                 goto alloc_err;
 427
 428         status = ocrdma_build_sgid_tbl(dev);
 429         if (status)
 430                 goto alloc_err;
 431
 432         status = ocrdma_register_device(dev);
 433         if (status)
 434                 goto alloc_err;
 435
 436         spin_lock(&ocrdma_devlist_lock);
 437         list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
 438         spin_unlock(&ocrdma_devlist_lock);
 439         return dev;
 440
 441 alloc_err:
 442         ocrdma_free_resources(dev);
 443         ocrdma_cleanup_hw(dev);
 444 init_err:
 445         idr_remove(&ocrdma_dev_id, dev->id);
 446 idr_err:
 447         kfree(dev->mbx_cmd);
 448         ib_dealloc_device(&dev->ibdev);
 449         ocrdma_err("%s() leaving. ret=%d\n", __func__, status);
 450         return NULL;
 451 }
 452
 453 static void ocrdma_remove_free(struct rcu_head *rcu)
 454 {
 455         struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
 456
 457         ocrdma_free_resources(dev);
 458         ocrdma_cleanup_hw(dev);
 459
 460         idr_remove(&ocrdma_dev_id, dev->id);
 461         kfree(dev->mbx_cmd);
 462         ib_dealloc_device(&dev->ibdev);
 463 }
 464
 465 static void ocrdma_remove(struct ocrdma_dev *dev)
 466 {
 467         /* first unregister with stack to stop all the active traffic
 468          * of the registered clients.
 469          */
 470         ib_unregister_device(&dev->ibdev);
 471
 472         spin_lock(&ocrdma_devlist_lock);
 473         list_del_rcu(&dev->entry);
 474         spin_unlock(&ocrdma_devlist_lock);
 475         call_rcu(&dev->rcu, ocrdma_remove_free);
 476 }
 477
 478 static int ocrdma_open(struct ocrdma_dev *dev)
 479 {
 480         struct ib_event port_event;
 481
 482         port_event.event = IB_EVENT_PORT_ACTIVE;
 483         port_event.element.port_num = 1;
 484         port_event.device = &dev->ibdev;
 485         ib_dispatch_event(&port_event);
 486         return 0;
 487 }
 488
 489 static int ocrdma_close(struct ocrdma_dev *dev)
 490 {
 491         int i;
 492         struct ocrdma_qp *qp, **cur_qp;
 493         struct ib_event err_event;
 494         struct ib_qp_attr attrs;
 495         int attr_mask = IB_QP_STATE;
 496
 497         attrs.qp_state = IB_QPS_ERR;
 498         mutex_lock(&dev->dev_lock);
 499         if (dev->qp_tbl) {
 500                 cur_qp = dev->qp_tbl;
 501                 for (i = 0; i < OCRDMA_MAX_QP; i++) {
 502                         qp = cur_qp[i];
 503                         if (qp) {
 504                                 /* change the QP state to ERROR */
 505                                 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
 506
 507                                 err_event.event = IB_EVENT_QP_FATAL;
 508                                 err_event.element.qp = &qp->ibqp;
 509                                 err_event.device = &dev->ibdev;
 510                                 ib_dispatch_event(&err_event);
 511                         }
 512                 }
 513         }
 514         mutex_unlock(&dev->dev_lock);
 515
 516         err_event.event = IB_EVENT_PORT_ERR;
 517         err_event.element.port_num = 1;
 518         err_event.device = &dev->ibdev;
 519         ib_dispatch_event(&err_event);
 520         return 0;
 521 }
 522
 523 /* event handling via NIC driver ensures that all the NIC specific
 524  * initialization done before RoCE driver notifies
 525  * event to stack.
 526  */
 527 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 528 {
 529         switch (event) {
 530         case BE_DEV_UP:
 531                 ocrdma_open(dev);
 532                 break;
 533         case BE_DEV_DOWN:
 534                 ocrdma_close(dev);
 535                 break;
 536         };
 537 }
 538
 539 static struct ocrdma_driver ocrdma_drv = {
 540         .name                   = "ocrdma_driver",
 541         .add                    = ocrdma_add,
 542         .remove                 = ocrdma_remove,
 543         .state_change_handler   = ocrdma_event_handler,
 544 };
 545
 546 static void ocrdma_unregister_inet6addr_notifier(void)
 547 {
 548 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 549         unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 550 #endif
 551 }
 552
 553 static int __init ocrdma_init_module(void)
 554 {
 555         int status;
 556
 557 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 558         status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 559         if (status)
 560                 return status;
 561 #endif
 562
 563         status = be_roce_register_driver(&ocrdma_drv);
 564         if (status)
 565                 ocrdma_unregister_inet6addr_notifier();
 566
 567         return status;
 568 }
 569
 570 static void __exit ocrdma_exit_module(void)
 571 {
 572         be_roce_unregister_driver(&ocrdma_drv);
 573         ocrdma_unregister_inet6addr_notifier();
 574 }
 575
 576 module_init(ocrdma_init_module);
 577 module_exit(ocrdma_exit_module);