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/idr.h>
  30 #include <rdma/ib_verbs.h>
  31 #include <rdma/ib_user_verbs.h>
  32 #include <rdma/ib_addr.h>
  33
  34 #include <linux/netdevice.h>
  35 #include <net/addrconf.h>
  36
  37 #include "ocrdma.h"
  38 #include "ocrdma_verbs.h"
  39 #include "ocrdma_ah.h"
  40 #include "be_roce.h"
  41 #include "ocrdma_hw.h"
  42
  43 MODULE_VERSION(OCRDMA_ROCE_DEV_VERSION);
  44 MODULE_DESCRIPTION("Emulex RoCE HCA Driver");
  45 MODULE_AUTHOR("Emulex Corporation");
  46 MODULE_LICENSE("GPL");
  47
  48 static LIST_HEAD(ocrdma_dev_list);
  49 static DEFINE_SPINLOCK(ocrdma_devlist_lock);
  50 static DEFINE_IDR(ocrdma_dev_id);
  51
  52 static union ib_gid ocrdma_zero_sgid;
  53
  54 static int ocrdma_get_instance(void)
  55 {
  56         int instance = 0;
  57
  58         /* Assign an unused number */
  59         if (!idr_pre_get(&ocrdma_dev_id, GFP_KERNEL))
  60                 return -1;
  61         if (idr_get_new(&ocrdma_dev_id, NULL, &instance))
  62                 return -1;
  63         return instance;
  64 }
  65
  66 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
  67 {
  68         u8 mac_addr[6];
  69
  70         memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
  71         guid[0] = mac_addr[0] ^ 2;
  72         guid[1] = mac_addr[1];
  73         guid[2] = mac_addr[2];
  74         guid[3] = 0xff;
  75         guid[4] = 0xfe;
  76         guid[5] = mac_addr[3];
  77         guid[6] = mac_addr[4];
  78         guid[7] = mac_addr[5];
  79 }
  80
  81 static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char *mac_addr,
  82                                   bool is_vlan, u16 vlan_id)
  83 {
  84         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
  85         sgid->raw[8] = mac_addr[0] ^ 2;
  86         sgid->raw[9] = mac_addr[1];
  87         sgid->raw[10] = mac_addr[2];
  88         if (is_vlan) {
  89                 sgid->raw[11] = vlan_id >> 8;
  90                 sgid->raw[12] = vlan_id & 0xff;
  91         } else {
  92                 sgid->raw[11] = 0xff;
  93                 sgid->raw[12] = 0xfe;
  94         }
  95         sgid->raw[13] = mac_addr[3];
  96         sgid->raw[14] = mac_addr[4];
  97         sgid->raw[15] = mac_addr[5];
  98 }
  99
 100 static bool ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
 101                             bool is_vlan, u16 vlan_id)
 102 {
 103         int i;
 104         union ib_gid new_sgid;
 105         unsigned long flags;
 106
 107         memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
 108
 109         ocrdma_build_sgid_mac(&new_sgid, mac_addr, is_vlan, vlan_id);
 110
 111         spin_lock_irqsave(&dev->sgid_lock, flags);
 112         for (i = 0; i < OCRDMA_MAX_SGID; i++) {
 113                 if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
 114                             sizeof(union ib_gid))) {
 115                         /* found free entry */
 116                         memcpy(&dev->sgid_tbl[i], &new_sgid,
 117                                sizeof(union ib_gid));
 118                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 119                         return true;
 120                 } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
 121                                    sizeof(union ib_gid))) {
 122                         /* entry already present, no addition is required. */
 123                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 124                         return false;
 125                 }
 126         }
 127         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 128         return false;
 129 }
 130
 131 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
 132                             bool is_vlan, u16 vlan_id)
 133 {
 134         int found = false;
 135         int i;
 136         union ib_gid sgid;
 137         unsigned long flags;
 138
 139         ocrdma_build_sgid_mac(&sgid, mac_addr, is_vlan, vlan_id);
 140
 141         spin_lock_irqsave(&dev->sgid_lock, flags);
 142         /* first is default sgid, which cannot be deleted. */
 143         for (i = 1; i < OCRDMA_MAX_SGID; i++) {
 144                 if (!memcmp(&dev->sgid_tbl[i], &sgid, sizeof(union ib_gid))) {
 145                         /* found matching entry */
 146                         memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
 147                         found = true;
 148                         break;
 149                 }
 150         }
 151         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 152         return found;
 153 }
 154
 155 static void ocrdma_add_default_sgid(struct ocrdma_dev *dev)
 156 {
 157         /* GID Index 0 - Invariant manufacturer-assigned EUI-64 */
 158         union ib_gid *sgid = &dev->sgid_tbl[0];
 159
 160         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
 161         ocrdma_get_guid(dev, &sgid->raw[8]);
 162 }
 163
 164 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 165 static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
 166 {
 167         struct net_device *netdev, *tmp;
 168         u16 vlan_id;
 169         bool is_vlan;
 170
 171         netdev = dev->nic_info.netdev;
 172
 173         rcu_read_lock();
 174         for_each_netdev_rcu(&init_net, tmp) {
 175                 if (netdev == tmp || vlan_dev_real_dev(tmp) == netdev) {
 176                         if (!netif_running(tmp) || !netif_oper_up(tmp))
 177                                 continue;
 178                         if (netdev != tmp) {
 179                                 vlan_id = vlan_dev_vlan_id(tmp);
 180                                 is_vlan = true;
 181                         } else {
 182                                 is_vlan = false;
 183                                 vlan_id = 0;
 184                                 tmp = netdev;
 185                         }
 186                         ocrdma_add_sgid(dev, tmp->dev_addr, is_vlan, vlan_id);
 187                 }
 188         }
 189         rcu_read_unlock();
 190 }
 191 #else
 192 static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
 193 {
 194
 195 }
 196 #endif /* VLAN */
 197
 198 static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
 199 {
 200         ocrdma_add_default_sgid(dev);
 201         ocrdma_add_vlan_sgids(dev);
 202         return 0;
 203 }
 204
 205 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) || \
 206 defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 207
 208 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
 209                                   unsigned long event, void *ptr)
 210 {
 211         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 212         struct net_device *event_netdev = ifa->idev->dev;
 213         struct net_device *netdev = NULL;
 214         struct ib_event gid_event;
 215         struct ocrdma_dev *dev;
 216         bool found = false;
 217         bool updated = false;
 218         bool is_vlan = false;
 219         u16 vid = 0;
 220
 221         netdev = vlan_dev_real_dev(event_netdev);
 222         if (netdev != event_netdev) {
 223                 is_vlan = true;
 224                 vid = vlan_dev_vlan_id(event_netdev);
 225         }
 226         rcu_read_lock();
 227         list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
 228                 if (dev->nic_info.netdev == netdev) {
 229                         found = true;
 230                         break;
 231                 }
 232         }
 233         rcu_read_unlock();
 234
 235         if (!found)
 236                 return NOTIFY_DONE;
 237         if (!rdma_link_local_addr((struct in6_addr *)&ifa->addr))
 238                 return NOTIFY_DONE;
 239
 240         mutex_lock(&dev->dev_lock);
 241         switch (event) {
 242         case NETDEV_UP:
 243                 updated = ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
 244                 break;
 245         case NETDEV_DOWN:
 246                 updated = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
 247                 break;
 248         default:
 249                 break;
 250         }
 251         if (updated) {
 252                 /* GID table updated, notify the consumers about it */
 253                 gid_event.device = &dev->ibdev;
 254                 gid_event.element.port_num = 1;
 255                 gid_event.event = IB_EVENT_GID_CHANGE;
 256                 ib_dispatch_event(&gid_event);
 257         }
 258         mutex_unlock(&dev->dev_lock);
 259         return NOTIFY_OK;
 260 }
 261
 262 static struct notifier_block ocrdma_inet6addr_notifier = {
 263         .notifier_call = ocrdma_inet6addr_event
 264 };
 265
 266 #endif /* IPV6 and VLAN */
 267
 268 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
 269                                               u8 port_num)
 270 {
 271         return IB_LINK_LAYER_ETHERNET;
 272 }
 273
 274 static int ocrdma_register_device(struct ocrdma_dev *dev)
 275 {
 276         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 277         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 278         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 279                sizeof(OCRDMA_NODE_DESC));
 280         dev->ibdev.owner = THIS_MODULE;
 281         dev->ibdev.uverbs_cmd_mask =
 282             OCRDMA_UVERBS(GET_CONTEXT) |
 283             OCRDMA_UVERBS(QUERY_DEVICE) |
 284             OCRDMA_UVERBS(QUERY_PORT) |
 285             OCRDMA_UVERBS(ALLOC_PD) |
 286             OCRDMA_UVERBS(DEALLOC_PD) |
 287             OCRDMA_UVERBS(REG_MR) |
 288             OCRDMA_UVERBS(DEREG_MR) |
 289             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 290             OCRDMA_UVERBS(CREATE_CQ) |
 291             OCRDMA_UVERBS(RESIZE_CQ) |
 292             OCRDMA_UVERBS(DESTROY_CQ) |
 293             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 294             OCRDMA_UVERBS(CREATE_QP) |
 295             OCRDMA_UVERBS(MODIFY_QP) |
 296             OCRDMA_UVERBS(QUERY_QP) |
 297             OCRDMA_UVERBS(DESTROY_QP) |
 298             OCRDMA_UVERBS(POLL_CQ) |
 299             OCRDMA_UVERBS(POST_SEND) |
 300             OCRDMA_UVERBS(POST_RECV);
 301
 302         dev->ibdev.uverbs_cmd_mask |=
 303             OCRDMA_UVERBS(CREATE_AH) |
 304              OCRDMA_UVERBS(MODIFY_AH) |
 305              OCRDMA_UVERBS(QUERY_AH) |
 306              OCRDMA_UVERBS(DESTROY_AH);
 307
 308         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 309         dev->ibdev.phys_port_cnt = 1;
 310         dev->ibdev.num_comp_vectors = 1;
 311
 312         /* mandatory verbs. */
 313         dev->ibdev.query_device = ocrdma_query_device;
 314         dev->ibdev.query_port = ocrdma_query_port;
 315         dev->ibdev.modify_port = ocrdma_modify_port;
 316         dev->ibdev.query_gid = ocrdma_query_gid;
 317         dev->ibdev.get_link_layer = ocrdma_link_layer;
 318         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 319         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 320
 321         dev->ibdev.create_cq = ocrdma_create_cq;
 322         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 323         dev->ibdev.resize_cq = ocrdma_resize_cq;
 324
 325         dev->ibdev.create_qp = ocrdma_create_qp;
 326         dev->ibdev.modify_qp = ocrdma_modify_qp;
 327         dev->ibdev.query_qp = ocrdma_query_qp;
 328         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 329
 330         dev->ibdev.query_pkey = ocrdma_query_pkey;
 331         dev->ibdev.create_ah = ocrdma_create_ah;
 332         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 333         dev->ibdev.query_ah = ocrdma_query_ah;
 334         dev->ibdev.modify_ah = ocrdma_modify_ah;
 335
 336         dev->ibdev.poll_cq = ocrdma_poll_cq;
 337         dev->ibdev.post_send = ocrdma_post_send;
 338         dev->ibdev.post_recv = ocrdma_post_recv;
 339         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 340
 341         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 342         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 343         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 344
 345         /* mandatory to support user space verbs consumer. */
 346         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 347         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 348         dev->ibdev.mmap = ocrdma_mmap;
 349         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 350
 351         dev->ibdev.process_mad = ocrdma_process_mad;
 352
 353         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
 354                 dev->ibdev.uverbs_cmd_mask |=
 355                      OCRDMA_UVERBS(CREATE_SRQ) |
 356                      OCRDMA_UVERBS(MODIFY_SRQ) |
 357                      OCRDMA_UVERBS(QUERY_SRQ) |
 358                      OCRDMA_UVERBS(DESTROY_SRQ) |
 359                      OCRDMA_UVERBS(POST_SRQ_RECV);
 360
 361                 dev->ibdev.create_srq = ocrdma_create_srq;
 362                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 363                 dev->ibdev.query_srq = ocrdma_query_srq;
 364                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 365                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 366         }
 367         return ib_register_device(&dev->ibdev, NULL);
 368 }
 369
 370 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 371 {
 372         mutex_init(&dev->dev_lock);
 373         dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
 374                                 OCRDMA_MAX_SGID, GFP_KERNEL);
 375         if (!dev->sgid_tbl)
 376                 goto alloc_err;
 377         spin_lock_init(&dev->sgid_lock);
 378
 379         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 380                               OCRDMA_MAX_CQ, GFP_KERNEL);
 381         if (!dev->cq_tbl)
 382                 goto alloc_err;
 383
 384         if (dev->attr.max_qp) {
 385                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 386                                       OCRDMA_MAX_QP, GFP_KERNEL);
 387                 if (!dev->qp_tbl)
 388                         goto alloc_err;
 389         }
 390         spin_lock_init(&dev->av_tbl.lock);
 391         spin_lock_init(&dev->flush_q_lock);
 392         return 0;
 393 alloc_err:
 394         ocrdma_err("%s(%d) error.\n", __func__, dev->id);
 395         return -ENOMEM;
 396 }
 397
 398 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 399 {
 400         kfree(dev->qp_tbl);
 401         kfree(dev->cq_tbl);
 402         kfree(dev->sgid_tbl);
 403 }
 404
 405 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 406 {
 407         int status = 0;
 408         struct ocrdma_dev *dev;
 409
 410         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 411         if (!dev) {
 412                 ocrdma_err("Unable to allocate ib device\n");
 413                 return NULL;
 414         }
 415         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 416         if (!dev->mbx_cmd)
 417                 goto idr_err;
 418
 419         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 420         dev->id = ocrdma_get_instance();
 421         if (dev->id < 0)
 422                 goto idr_err;
 423
 424         status = ocrdma_init_hw(dev);
 425         if (status)
 426                 goto init_err;
 427
 428         status = ocrdma_alloc_resources(dev);
 429         if (status)
 430                 goto alloc_err;
 431
 432         status = ocrdma_build_sgid_tbl(dev);
 433         if (status)
 434                 goto alloc_err;
 435
 436         status = ocrdma_register_device(dev);
 437         if (status)
 438                 goto alloc_err;
 439
 440         spin_lock(&ocrdma_devlist_lock);
 441         list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
 442         spin_unlock(&ocrdma_devlist_lock);
 443         return dev;
 444
 445 alloc_err:
 446         ocrdma_free_resources(dev);
 447         ocrdma_cleanup_hw(dev);
 448 init_err:
 449         idr_remove(&ocrdma_dev_id, dev->id);
 450 idr_err:
 451         kfree(dev->mbx_cmd);
 452         ib_dealloc_device(&dev->ibdev);
 453         ocrdma_err("%s() leaving. ret=%d\n", __func__, status);
 454         return NULL;
 455 }
 456
 457 static void ocrdma_remove_free(struct rcu_head *rcu)
 458 {
 459         struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
 460
 461         ocrdma_free_resources(dev);
 462         ocrdma_cleanup_hw(dev);
 463
 464         idr_remove(&ocrdma_dev_id, dev->id);
 465         kfree(dev->mbx_cmd);
 466         ib_dealloc_device(&dev->ibdev);
 467 }
 468
 469 static void ocrdma_remove(struct ocrdma_dev *dev)
 470 {
 471         /* first unregister with stack to stop all the active traffic
 472          * of the registered clients.
 473          */
 474         ib_unregister_device(&dev->ibdev);
 475
 476         spin_lock(&ocrdma_devlist_lock);
 477         list_del_rcu(&dev->entry);
 478         spin_unlock(&ocrdma_devlist_lock);
 479         call_rcu(&dev->rcu, ocrdma_remove_free);
 480 }
 481
 482 static int ocrdma_open(struct ocrdma_dev *dev)
 483 {
 484         struct ib_event port_event;
 485
 486         port_event.event = IB_EVENT_PORT_ACTIVE;
 487         port_event.element.port_num = 1;
 488         port_event.device = &dev->ibdev;
 489         ib_dispatch_event(&port_event);
 490         return 0;
 491 }
 492
 493 static int ocrdma_close(struct ocrdma_dev *dev)
 494 {
 495         int i;
 496         struct ocrdma_qp *qp, **cur_qp;
 497         struct ib_event err_event;
 498         struct ib_qp_attr attrs;
 499         int attr_mask = IB_QP_STATE;
 500
 501         attrs.qp_state = IB_QPS_ERR;
 502         mutex_lock(&dev->dev_lock);
 503         if (dev->qp_tbl) {
 504                 cur_qp = dev->qp_tbl;
 505                 for (i = 0; i < OCRDMA_MAX_QP; i++) {
 506                         qp = cur_qp[i];
 507                         if (qp) {
 508                                 /* change the QP state to ERROR */
 509                                 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
 510
 511                                 err_event.event = IB_EVENT_QP_FATAL;
 512                                 err_event.element.qp = &qp->ibqp;
 513                                 err_event.device = &dev->ibdev;
 514                                 ib_dispatch_event(&err_event);
 515                         }
 516                 }
 517         }
 518         mutex_unlock(&dev->dev_lock);
 519
 520         err_event.event = IB_EVENT_PORT_ERR;
 521         err_event.element.port_num = 1;
 522         err_event.device = &dev->ibdev;
 523         ib_dispatch_event(&err_event);
 524         return 0;
 525 }
 526
 527 /* event handling via NIC driver ensures that all the NIC specific
 528  * initialization done before RoCE driver notifies
 529  * event to stack.
 530  */
 531 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 532 {
 533         switch (event) {
 534         case BE_DEV_UP:
 535                 ocrdma_open(dev);
 536                 break;
 537         case BE_DEV_DOWN:
 538                 ocrdma_close(dev);
 539                 break;
 540         };
 541 }
 542
 543 static struct ocrdma_driver ocrdma_drv = {
 544         .name                   = "ocrdma_driver",
 545         .add                    = ocrdma_add,
 546         .remove                 = ocrdma_remove,
 547         .state_change_handler   = ocrdma_event_handler,
 548 };
 549
 550 static void ocrdma_unregister_inet6addr_notifier(void)
 551 {
 552 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 553         unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 554 #endif
 555 }
 556
 557 static int __init ocrdma_init_module(void)
 558 {
 559         int status;
 560
 561 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 562         status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 563         if (status)
 564                 return status;
 565 #endif
 566
 567         status = be_roce_register_driver(&ocrdma_drv);
 568         if (status)
 569                 ocrdma_unregister_inet6addr_notifier();
 570
 571         return status;
 572 }
 573
 574 static void __exit ocrdma_exit_module(void)
 575 {
 576         be_roce_unregister_driver(&ocrdma_drv);
 577         ocrdma_unregister_inet6addr_notifier();
 578 }
 579
 580 module_init(ocrdma_init_module);
 581 module_exit(ocrdma_exit_module);