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 #include "ocrdma_abi.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 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
  56 {
  57         u8 mac_addr[6];
  58
  59         memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
  60         guid[0] = mac_addr[0] ^ 2;
  61         guid[1] = mac_addr[1];
  62         guid[2] = mac_addr[2];
  63         guid[3] = 0xff;
  64         guid[4] = 0xfe;
  65         guid[5] = mac_addr[3];
  66         guid[6] = mac_addr[4];
  67         guid[7] = mac_addr[5];
  68 }
  69
  70 static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char *mac_addr,
  71                                   bool is_vlan, u16 vlan_id)
  72 {
  73         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
  74         sgid->raw[8] = mac_addr[0] ^ 2;
  75         sgid->raw[9] = mac_addr[1];
  76         sgid->raw[10] = mac_addr[2];
  77         if (is_vlan) {
  78                 sgid->raw[11] = vlan_id >> 8;
  79                 sgid->raw[12] = vlan_id & 0xff;
  80         } else {
  81                 sgid->raw[11] = 0xff;
  82                 sgid->raw[12] = 0xfe;
  83         }
  84         sgid->raw[13] = mac_addr[3];
  85         sgid->raw[14] = mac_addr[4];
  86         sgid->raw[15] = mac_addr[5];
  87 }
  88
  89 static bool ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
  90                             bool is_vlan, u16 vlan_id)
  91 {
  92         int i;
  93         union ib_gid new_sgid;
  94         unsigned long flags;
  95
  96         memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
  97
  98         ocrdma_build_sgid_mac(&new_sgid, mac_addr, is_vlan, vlan_id);
  99
 100         spin_lock_irqsave(&dev->sgid_lock, flags);
 101         for (i = 0; i < OCRDMA_MAX_SGID; i++) {
 102                 if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
 103                             sizeof(union ib_gid))) {
 104                         /* found free entry */
 105                         memcpy(&dev->sgid_tbl[i], &new_sgid,
 106                                sizeof(union ib_gid));
 107                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 108                         return true;
 109                 } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
 110                                    sizeof(union ib_gid))) {
 111                         /* entry already present, no addition is required. */
 112                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 113                         return false;
 114                 }
 115         }
 116         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 117         return false;
 118 }
 119
 120 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
 121                             bool is_vlan, u16 vlan_id)
 122 {
 123         int found = false;
 124         int i;
 125         union ib_gid sgid;
 126         unsigned long flags;
 127
 128         ocrdma_build_sgid_mac(&sgid, mac_addr, is_vlan, vlan_id);
 129
 130         spin_lock_irqsave(&dev->sgid_lock, flags);
 131         /* first is default sgid, which cannot be deleted. */
 132         for (i = 1; i < OCRDMA_MAX_SGID; i++) {
 133                 if (!memcmp(&dev->sgid_tbl[i], &sgid, sizeof(union ib_gid))) {
 134                         /* found matching entry */
 135                         memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
 136                         found = true;
 137                         break;
 138                 }
 139         }
 140         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 141         return found;
 142 }
 143
 144 static void ocrdma_add_default_sgid(struct ocrdma_dev *dev)
 145 {
 146         /* GID Index 0 - Invariant manufacturer-assigned EUI-64 */
 147         union ib_gid *sgid = &dev->sgid_tbl[0];
 148
 149         sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
 150         ocrdma_get_guid(dev, &sgid->raw[8]);
 151 }
 152
 153 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 154 static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
 155 {
 156         struct net_device *netdev, *tmp;
 157         u16 vlan_id;
 158         bool is_vlan;
 159
 160         netdev = dev->nic_info.netdev;
 161
 162         rcu_read_lock();
 163         for_each_netdev_rcu(&init_net, tmp) {
 164                 if (netdev == tmp || vlan_dev_real_dev(tmp) == netdev) {
 165                         if (!netif_running(tmp) || !netif_oper_up(tmp))
 166                                 continue;
 167                         if (netdev != tmp) {
 168                                 vlan_id = vlan_dev_vlan_id(tmp);
 169                                 is_vlan = true;
 170                         } else {
 171                                 is_vlan = false;
 172                                 vlan_id = 0;
 173                                 tmp = netdev;
 174                         }
 175                         ocrdma_add_sgid(dev, tmp->dev_addr, is_vlan, vlan_id);
 176                 }
 177         }
 178         rcu_read_unlock();
 179 }
 180 #else
 181 static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
 182 {
 183
 184 }
 185 #endif /* VLAN */
 186
 187 static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
 188 {
 189         ocrdma_add_default_sgid(dev);
 190         ocrdma_add_vlan_sgids(dev);
 191         return 0;
 192 }
 193
 194 #if IS_ENABLED(CONFIG_IPV6)
 195
 196 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
 197                                   unsigned long event, void *ptr)
 198 {
 199         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 200         struct net_device *netdev = ifa->idev->dev;
 201         struct ib_event gid_event;
 202         struct ocrdma_dev *dev;
 203         bool found = false;
 204         bool updated = false;
 205         bool is_vlan = false;
 206         u16 vid = 0;
 207
 208         is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
 209         if (is_vlan) {
 210                 vid = vlan_dev_vlan_id(netdev);
 211                 netdev = vlan_dev_real_dev(netdev);
 212         }
 213
 214         rcu_read_lock();
 215         list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
 216                 if (dev->nic_info.netdev == netdev) {
 217                         found = true;
 218                         break;
 219                 }
 220         }
 221         rcu_read_unlock();
 222
 223         if (!found)
 224                 return NOTIFY_DONE;
 225         if (!rdma_link_local_addr((struct in6_addr *)&ifa->addr))
 226                 return NOTIFY_DONE;
 227
 228         mutex_lock(&dev->dev_lock);
 229         switch (event) {
 230         case NETDEV_UP:
 231                 updated = ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
 232                 break;
 233         case NETDEV_DOWN:
 234                 updated = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
 235                 break;
 236         default:
 237                 break;
 238         }
 239         if (updated) {
 240                 /* GID table updated, notify the consumers about it */
 241                 gid_event.device = &dev->ibdev;
 242                 gid_event.element.port_num = 1;
 243                 gid_event.event = IB_EVENT_GID_CHANGE;
 244                 ib_dispatch_event(&gid_event);
 245         }
 246         mutex_unlock(&dev->dev_lock);
 247         return NOTIFY_OK;
 248 }
 249
 250 static struct notifier_block ocrdma_inet6addr_notifier = {
 251         .notifier_call = ocrdma_inet6addr_event
 252 };
 253
 254 #endif /* IPV6 and VLAN */
 255
 256 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
 257                                               u8 port_num)
 258 {
 259         return IB_LINK_LAYER_ETHERNET;
 260 }
 261
 262 static int ocrdma_register_device(struct ocrdma_dev *dev)
 263 {
 264         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 265         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 266         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 267                sizeof(OCRDMA_NODE_DESC));
 268         dev->ibdev.owner = THIS_MODULE;
 269         dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
 270         dev->ibdev.uverbs_cmd_mask =
 271             OCRDMA_UVERBS(GET_CONTEXT) |
 272             OCRDMA_UVERBS(QUERY_DEVICE) |
 273             OCRDMA_UVERBS(QUERY_PORT) |
 274             OCRDMA_UVERBS(ALLOC_PD) |
 275             OCRDMA_UVERBS(DEALLOC_PD) |
 276             OCRDMA_UVERBS(REG_MR) |
 277             OCRDMA_UVERBS(DEREG_MR) |
 278             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 279             OCRDMA_UVERBS(CREATE_CQ) |
 280             OCRDMA_UVERBS(RESIZE_CQ) |
 281             OCRDMA_UVERBS(DESTROY_CQ) |
 282             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 283             OCRDMA_UVERBS(CREATE_QP) |
 284             OCRDMA_UVERBS(MODIFY_QP) |
 285             OCRDMA_UVERBS(QUERY_QP) |
 286             OCRDMA_UVERBS(DESTROY_QP) |
 287             OCRDMA_UVERBS(POLL_CQ) |
 288             OCRDMA_UVERBS(POST_SEND) |
 289             OCRDMA_UVERBS(POST_RECV);
 290
 291         dev->ibdev.uverbs_cmd_mask |=
 292             OCRDMA_UVERBS(CREATE_AH) |
 293              OCRDMA_UVERBS(MODIFY_AH) |
 294              OCRDMA_UVERBS(QUERY_AH) |
 295              OCRDMA_UVERBS(DESTROY_AH);
 296
 297         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 298         dev->ibdev.phys_port_cnt = 1;
 299         dev->ibdev.num_comp_vectors = 1;
 300
 301         /* mandatory verbs. */
 302         dev->ibdev.query_device = ocrdma_query_device;
 303         dev->ibdev.query_port = ocrdma_query_port;
 304         dev->ibdev.modify_port = ocrdma_modify_port;
 305         dev->ibdev.query_gid = ocrdma_query_gid;
 306         dev->ibdev.get_link_layer = ocrdma_link_layer;
 307         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 308         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 309
 310         dev->ibdev.create_cq = ocrdma_create_cq;
 311         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 312         dev->ibdev.resize_cq = ocrdma_resize_cq;
 313
 314         dev->ibdev.create_qp = ocrdma_create_qp;
 315         dev->ibdev.modify_qp = ocrdma_modify_qp;
 316         dev->ibdev.query_qp = ocrdma_query_qp;
 317         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 318
 319         dev->ibdev.query_pkey = ocrdma_query_pkey;
 320         dev->ibdev.create_ah = ocrdma_create_ah;
 321         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 322         dev->ibdev.query_ah = ocrdma_query_ah;
 323         dev->ibdev.modify_ah = ocrdma_modify_ah;
 324
 325         dev->ibdev.poll_cq = ocrdma_poll_cq;
 326         dev->ibdev.post_send = ocrdma_post_send;
 327         dev->ibdev.post_recv = ocrdma_post_recv;
 328         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 329
 330         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 331         dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr;
 332         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 333         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 334
 335         dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
 336         dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
 337         dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;
 338
 339         /* mandatory to support user space verbs consumer. */
 340         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 341         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 342         dev->ibdev.mmap = ocrdma_mmap;
 343         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 344
 345         dev->ibdev.process_mad = ocrdma_process_mad;
 346
 347         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
 348                 dev->ibdev.uverbs_cmd_mask |=
 349                      OCRDMA_UVERBS(CREATE_SRQ) |
 350                      OCRDMA_UVERBS(MODIFY_SRQ) |
 351                      OCRDMA_UVERBS(QUERY_SRQ) |
 352                      OCRDMA_UVERBS(DESTROY_SRQ) |
 353                      OCRDMA_UVERBS(POST_SRQ_RECV);
 354
 355                 dev->ibdev.create_srq = ocrdma_create_srq;
 356                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 357                 dev->ibdev.query_srq = ocrdma_query_srq;
 358                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 359                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 360         }
 361         return ib_register_device(&dev->ibdev, NULL);
 362 }
 363
 364 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 365 {
 366         mutex_init(&dev->dev_lock);
 367         dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
 368                                 OCRDMA_MAX_SGID, GFP_KERNEL);
 369         if (!dev->sgid_tbl)
 370                 goto alloc_err;
 371         spin_lock_init(&dev->sgid_lock);
 372
 373         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 374                               OCRDMA_MAX_CQ, GFP_KERNEL);
 375         if (!dev->cq_tbl)
 376                 goto alloc_err;
 377
 378         if (dev->attr.max_qp) {
 379                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 380                                       OCRDMA_MAX_QP, GFP_KERNEL);
 381                 if (!dev->qp_tbl)
 382                         goto alloc_err;
 383         }
 384         spin_lock_init(&dev->av_tbl.lock);
 385         spin_lock_init(&dev->flush_q_lock);
 386         return 0;
 387 alloc_err:
 388         pr_err("%s(%d) error.\n", __func__, dev->id);
 389         return -ENOMEM;
 390 }
 391
 392 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 393 {
 394         kfree(dev->qp_tbl);
 395         kfree(dev->cq_tbl);
 396         kfree(dev->sgid_tbl);
 397 }
 398
 399 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 400 {
 401         int status = 0;
 402         struct ocrdma_dev *dev;
 403
 404         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 405         if (!dev) {
 406                 pr_err("Unable to allocate ib device\n");
 407                 return NULL;
 408         }
 409         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 410         if (!dev->mbx_cmd)
 411                 goto idr_err;
 412
 413         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 414         dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
 415         if (dev->id < 0)
 416                 goto idr_err;
 417
 418         status = ocrdma_init_hw(dev);
 419         if (status)
 420                 goto init_err;
 421
 422         status = ocrdma_alloc_resources(dev);
 423         if (status)
 424                 goto alloc_err;
 425
 426         status = ocrdma_build_sgid_tbl(dev);
 427         if (status)
 428                 goto alloc_err;
 429
 430         status = ocrdma_register_device(dev);
 431         if (status)
 432                 goto alloc_err;
 433
 434         spin_lock(&ocrdma_devlist_lock);
 435         list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
 436         spin_unlock(&ocrdma_devlist_lock);
 437         return dev;
 438
 439 alloc_err:
 440         ocrdma_free_resources(dev);
 441         ocrdma_cleanup_hw(dev);
 442 init_err:
 443         idr_remove(&ocrdma_dev_id, dev->id);
 444 idr_err:
 445         kfree(dev->mbx_cmd);
 446         ib_dealloc_device(&dev->ibdev);
 447         pr_err("%s() leaving. ret=%d\n", __func__, status);
 448         return NULL;
 449 }
 450
 451 static void ocrdma_remove_free(struct rcu_head *rcu)
 452 {
 453         struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
 454
 455         ocrdma_free_resources(dev);
 456         ocrdma_cleanup_hw(dev);
 457
 458         idr_remove(&ocrdma_dev_id, dev->id);
 459         kfree(dev->mbx_cmd);
 460         ib_dealloc_device(&dev->ibdev);
 461 }
 462
 463 static void ocrdma_remove(struct ocrdma_dev *dev)
 464 {
 465         /* first unregister with stack to stop all the active traffic
 466          * of the registered clients.
 467          */
 468         ib_unregister_device(&dev->ibdev);
 469
 470         spin_lock(&ocrdma_devlist_lock);
 471         list_del_rcu(&dev->entry);
 472         spin_unlock(&ocrdma_devlist_lock);
 473         call_rcu(&dev->rcu, ocrdma_remove_free);
 474 }
 475
 476 static int ocrdma_open(struct ocrdma_dev *dev)
 477 {
 478         struct ib_event port_event;
 479
 480         port_event.event = IB_EVENT_PORT_ACTIVE;
 481         port_event.element.port_num = 1;
 482         port_event.device = &dev->ibdev;
 483         ib_dispatch_event(&port_event);
 484         return 0;
 485 }
 486
 487 static int ocrdma_close(struct ocrdma_dev *dev)
 488 {
 489         int i;
 490         struct ocrdma_qp *qp, **cur_qp;
 491         struct ib_event err_event;
 492         struct ib_qp_attr attrs;
 493         int attr_mask = IB_QP_STATE;
 494
 495         attrs.qp_state = IB_QPS_ERR;
 496         mutex_lock(&dev->dev_lock);
 497         if (dev->qp_tbl) {
 498                 cur_qp = dev->qp_tbl;
 499                 for (i = 0; i < OCRDMA_MAX_QP; i++) {
 500                         qp = cur_qp[i];
 501                         if (qp) {
 502                                 /* change the QP state to ERROR */
 503                                 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
 504
 505                                 err_event.event = IB_EVENT_QP_FATAL;
 506                                 err_event.element.qp = &qp->ibqp;
 507                                 err_event.device = &dev->ibdev;
 508                                 ib_dispatch_event(&err_event);
 509                         }
 510                 }
 511         }
 512         mutex_unlock(&dev->dev_lock);
 513
 514         err_event.event = IB_EVENT_PORT_ERR;
 515         err_event.element.port_num = 1;
 516         err_event.device = &dev->ibdev;
 517         ib_dispatch_event(&err_event);
 518         return 0;
 519 }
 520
 521 /* event handling via NIC driver ensures that all the NIC specific
 522  * initialization done before RoCE driver notifies
 523  * event to stack.
 524  */
 525 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 526 {
 527         switch (event) {
 528         case BE_DEV_UP:
 529                 ocrdma_open(dev);
 530                 break;
 531         case BE_DEV_DOWN:
 532                 ocrdma_close(dev);
 533                 break;
 534         }
 535 }
 536
 537 static struct ocrdma_driver ocrdma_drv = {
 538         .name                   = "ocrdma_driver",
 539         .add                    = ocrdma_add,
 540         .remove                 = ocrdma_remove,
 541         .state_change_handler   = ocrdma_event_handler,
 542 };
 543
 544 static void ocrdma_unregister_inet6addr_notifier(void)
 545 {
 546 #if IS_ENABLED(CONFIG_IPV6)
 547         unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 548 #endif
 549 }
 550
 551 static int __init ocrdma_init_module(void)
 552 {
 553         int status;
 554
 555 #if IS_ENABLED(CONFIG_IPV6)
 556         status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 557         if (status)
 558                 return status;
 559 #endif
 560
 561         status = be_roce_register_driver(&ocrdma_drv);
 562         if (status)
 563                 ocrdma_unregister_inet6addr_notifier();
 564
 565         return status;
 566 }
 567
 568 static void __exit ocrdma_exit_module(void)
 569 {
 570         be_roce_unregister_driver(&ocrdma_drv);
 571         ocrdma_unregister_inet6addr_notifier();
 572 }
 573
 574 module_init(ocrdma_init_module);
 575 module_exit(ocrdma_exit_module);