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 IS_ENABLED(CONFIG_VLAN_8021Q)
 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 IS_ENABLED(CONFIG_IPV6)
 206
 207 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
 208                                   unsigned long event, void *ptr)
 209 {
 210         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 211         struct net_device *netdev = ifa->idev->dev;
 212         struct ib_event gid_event;
 213         struct ocrdma_dev *dev;
 214         bool found = false;
 215         bool updated = false;
 216         bool is_vlan = false;
 217         u16 vid = 0;
 218
 219         is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
 220         if (is_vlan) {
 221                 vid = vlan_dev_vlan_id(netdev);
 222                 netdev = vlan_dev_real_dev(netdev);
 223         }
 224
 225         rcu_read_lock();
 226         list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
 227                 if (dev->nic_info.netdev == netdev) {
 228                         found = true;
 229                         break;
 230                 }
 231         }
 232         rcu_read_unlock();
 233
 234         if (!found)
 235                 return NOTIFY_DONE;
 236         if (!rdma_link_local_addr((struct in6_addr *)&ifa->addr))
 237                 return NOTIFY_DONE;
 238
 239         mutex_lock(&dev->dev_lock);
 240         switch (event) {
 241         case NETDEV_UP:
 242                 updated = ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
 243                 break;
 244         case NETDEV_DOWN:
 245                 updated = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
 246                 break;
 247         default:
 248                 break;
 249         }
 250         if (updated) {
 251                 /* GID table updated, notify the consumers about it */
 252                 gid_event.device = &dev->ibdev;
 253                 gid_event.element.port_num = 1;
 254                 gid_event.event = IB_EVENT_GID_CHANGE;
 255                 ib_dispatch_event(&gid_event);
 256         }
 257         mutex_unlock(&dev->dev_lock);
 258         return NOTIFY_OK;
 259 }
 260
 261 static struct notifier_block ocrdma_inet6addr_notifier = {
 262         .notifier_call = ocrdma_inet6addr_event
 263 };
 264
 265 #endif /* IPV6 and VLAN */
 266
 267 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
 268                                               u8 port_num)
 269 {
 270         return IB_LINK_LAYER_ETHERNET;
 271 }
 272
 273 static int ocrdma_register_device(struct ocrdma_dev *dev)
 274 {
 275         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 276         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 277         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 278                sizeof(OCRDMA_NODE_DESC));
 279         dev->ibdev.owner = THIS_MODULE;
 280         dev->ibdev.uverbs_cmd_mask =
 281             OCRDMA_UVERBS(GET_CONTEXT) |
 282             OCRDMA_UVERBS(QUERY_DEVICE) |
 283             OCRDMA_UVERBS(QUERY_PORT) |
 284             OCRDMA_UVERBS(ALLOC_PD) |
 285             OCRDMA_UVERBS(DEALLOC_PD) |
 286             OCRDMA_UVERBS(REG_MR) |
 287             OCRDMA_UVERBS(DEREG_MR) |
 288             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 289             OCRDMA_UVERBS(CREATE_CQ) |
 290             OCRDMA_UVERBS(RESIZE_CQ) |
 291             OCRDMA_UVERBS(DESTROY_CQ) |
 292             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 293             OCRDMA_UVERBS(CREATE_QP) |
 294             OCRDMA_UVERBS(MODIFY_QP) |
 295             OCRDMA_UVERBS(QUERY_QP) |
 296             OCRDMA_UVERBS(DESTROY_QP) |
 297             OCRDMA_UVERBS(POLL_CQ) |
 298             OCRDMA_UVERBS(POST_SEND) |
 299             OCRDMA_UVERBS(POST_RECV);
 300
 301         dev->ibdev.uverbs_cmd_mask |=
 302             OCRDMA_UVERBS(CREATE_AH) |
 303              OCRDMA_UVERBS(MODIFY_AH) |
 304              OCRDMA_UVERBS(QUERY_AH) |
 305              OCRDMA_UVERBS(DESTROY_AH);
 306
 307         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 308         dev->ibdev.phys_port_cnt = 1;
 309         dev->ibdev.num_comp_vectors = 1;
 310
 311         /* mandatory verbs. */
 312         dev->ibdev.query_device = ocrdma_query_device;
 313         dev->ibdev.query_port = ocrdma_query_port;
 314         dev->ibdev.modify_port = ocrdma_modify_port;
 315         dev->ibdev.query_gid = ocrdma_query_gid;
 316         dev->ibdev.get_link_layer = ocrdma_link_layer;
 317         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 318         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 319
 320         dev->ibdev.create_cq = ocrdma_create_cq;
 321         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 322         dev->ibdev.resize_cq = ocrdma_resize_cq;
 323
 324         dev->ibdev.create_qp = ocrdma_create_qp;
 325         dev->ibdev.modify_qp = ocrdma_modify_qp;
 326         dev->ibdev.query_qp = ocrdma_query_qp;
 327         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 328
 329         dev->ibdev.query_pkey = ocrdma_query_pkey;
 330         dev->ibdev.create_ah = ocrdma_create_ah;
 331         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 332         dev->ibdev.query_ah = ocrdma_query_ah;
 333         dev->ibdev.modify_ah = ocrdma_modify_ah;
 334
 335         dev->ibdev.poll_cq = ocrdma_poll_cq;
 336         dev->ibdev.post_send = ocrdma_post_send;
 337         dev->ibdev.post_recv = ocrdma_post_recv;
 338         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 339
 340         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 341         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 342         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 343
 344         /* mandatory to support user space verbs consumer. */
 345         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 346         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 347         dev->ibdev.mmap = ocrdma_mmap;
 348         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 349
 350         dev->ibdev.process_mad = ocrdma_process_mad;
 351
 352         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
 353                 dev->ibdev.uverbs_cmd_mask |=
 354                      OCRDMA_UVERBS(CREATE_SRQ) |
 355                      OCRDMA_UVERBS(MODIFY_SRQ) |
 356                      OCRDMA_UVERBS(QUERY_SRQ) |
 357                      OCRDMA_UVERBS(DESTROY_SRQ) |
 358                      OCRDMA_UVERBS(POST_SRQ_RECV);
 359
 360                 dev->ibdev.create_srq = ocrdma_create_srq;
 361                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 362                 dev->ibdev.query_srq = ocrdma_query_srq;
 363                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 364                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 365         }
 366         return ib_register_device(&dev->ibdev, NULL);
 367 }
 368
 369 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 370 {
 371         mutex_init(&dev->dev_lock);
 372         dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
 373                                 OCRDMA_MAX_SGID, GFP_KERNEL);
 374         if (!dev->sgid_tbl)
 375                 goto alloc_err;
 376         spin_lock_init(&dev->sgid_lock);
 377
 378         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 379                               OCRDMA_MAX_CQ, GFP_KERNEL);
 380         if (!dev->cq_tbl)
 381                 goto alloc_err;
 382
 383         if (dev->attr.max_qp) {
 384                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 385                                       OCRDMA_MAX_QP, GFP_KERNEL);
 386                 if (!dev->qp_tbl)
 387                         goto alloc_err;
 388         }
 389         spin_lock_init(&dev->av_tbl.lock);
 390         spin_lock_init(&dev->flush_q_lock);
 391         return 0;
 392 alloc_err:
 393         ocrdma_err("%s(%d) error.\n", __func__, dev->id);
 394         return -ENOMEM;
 395 }
 396
 397 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 398 {
 399         kfree(dev->qp_tbl);
 400         kfree(dev->cq_tbl);
 401         kfree(dev->sgid_tbl);
 402 }
 403
 404 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 405 {
 406         int status = 0;
 407         struct ocrdma_dev *dev;
 408
 409         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 410         if (!dev) {
 411                 ocrdma_err("Unable to allocate ib device\n");
 412                 return NULL;
 413         }
 414         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 415         if (!dev->mbx_cmd)
 416                 goto idr_err;
 417
 418         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 419         dev->id = ocrdma_get_instance();
 420         if (dev->id < 0)
 421                 goto idr_err;
 422
 423         status = ocrdma_init_hw(dev);
 424         if (status)
 425                 goto init_err;
 426
 427         status = ocrdma_alloc_resources(dev);
 428         if (status)
 429                 goto alloc_err;
 430
 431         status = ocrdma_build_sgid_tbl(dev);
 432         if (status)
 433                 goto alloc_err;
 434
 435         status = ocrdma_register_device(dev);
 436         if (status)
 437                 goto alloc_err;
 438
 439         spin_lock(&ocrdma_devlist_lock);
 440         list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
 441         spin_unlock(&ocrdma_devlist_lock);
 442         return dev;
 443
 444 alloc_err:
 445         ocrdma_free_resources(dev);
 446         ocrdma_cleanup_hw(dev);
 447 init_err:
 448         idr_remove(&ocrdma_dev_id, dev->id);
 449 idr_err:
 450         kfree(dev->mbx_cmd);
 451         ib_dealloc_device(&dev->ibdev);
 452         ocrdma_err("%s() leaving. ret=%d\n", __func__, status);
 453         return NULL;
 454 }
 455
 456 static void ocrdma_remove_free(struct rcu_head *rcu)
 457 {
 458         struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
 459
 460         ocrdma_free_resources(dev);
 461         ocrdma_cleanup_hw(dev);
 462
 463         idr_remove(&ocrdma_dev_id, dev->id);
 464         kfree(dev->mbx_cmd);
 465         ib_dealloc_device(&dev->ibdev);
 466 }
 467
 468 static void ocrdma_remove(struct ocrdma_dev *dev)
 469 {
 470         /* first unregister with stack to stop all the active traffic
 471          * of the registered clients.
 472          */
 473         ib_unregister_device(&dev->ibdev);
 474
 475         spin_lock(&ocrdma_devlist_lock);
 476         list_del_rcu(&dev->entry);
 477         spin_unlock(&ocrdma_devlist_lock);
 478         call_rcu(&dev->rcu, ocrdma_remove_free);
 479 }
 480
 481 static int ocrdma_open(struct ocrdma_dev *dev)
 482 {
 483         struct ib_event port_event;
 484
 485         port_event.event = IB_EVENT_PORT_ACTIVE;
 486         port_event.element.port_num = 1;
 487         port_event.device = &dev->ibdev;
 488         ib_dispatch_event(&port_event);
 489         return 0;
 490 }
 491
 492 static int ocrdma_close(struct ocrdma_dev *dev)
 493 {
 494         int i;
 495         struct ocrdma_qp *qp, **cur_qp;
 496         struct ib_event err_event;
 497         struct ib_qp_attr attrs;
 498         int attr_mask = IB_QP_STATE;
 499
 500         attrs.qp_state = IB_QPS_ERR;
 501         mutex_lock(&dev->dev_lock);
 502         if (dev->qp_tbl) {
 503                 cur_qp = dev->qp_tbl;
 504                 for (i = 0; i < OCRDMA_MAX_QP; i++) {
 505                         qp = cur_qp[i];
 506                         if (qp) {
 507                                 /* change the QP state to ERROR */
 508                                 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
 509
 510                                 err_event.event = IB_EVENT_QP_FATAL;
 511                                 err_event.element.qp = &qp->ibqp;
 512                                 err_event.device = &dev->ibdev;
 513                                 ib_dispatch_event(&err_event);
 514                         }
 515                 }
 516         }
 517         mutex_unlock(&dev->dev_lock);
 518
 519         err_event.event = IB_EVENT_PORT_ERR;
 520         err_event.element.port_num = 1;
 521         err_event.device = &dev->ibdev;
 522         ib_dispatch_event(&err_event);
 523         return 0;
 524 }
 525
 526 /* event handling via NIC driver ensures that all the NIC specific
 527  * initialization done before RoCE driver notifies
 528  * event to stack.
 529  */
 530 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 531 {
 532         switch (event) {
 533         case BE_DEV_UP:
 534                 ocrdma_open(dev);
 535                 break;
 536         case BE_DEV_DOWN:
 537                 ocrdma_close(dev);
 538                 break;
 539         };
 540 }
 541
 542 static struct ocrdma_driver ocrdma_drv = {
 543         .name                   = "ocrdma_driver",
 544         .add                    = ocrdma_add,
 545         .remove                 = ocrdma_remove,
 546         .state_change_handler   = ocrdma_event_handler,
 547 };
 548
 549 static void ocrdma_unregister_inet6addr_notifier(void)
 550 {
 551 #if IS_ENABLED(CONFIG_IPV6)
 552         unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 553 #endif
 554 }
 555
 556 static int __init ocrdma_init_module(void)
 557 {
 558         int status;
 559
 560 #if IS_ENABLED(CONFIG_IPV6)
 561         status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 562         if (status)
 563                 return status;
 564 #endif
 565
 566         status = be_roce_register_driver(&ocrdma_drv);
 567         if (status)
 568                 ocrdma_unregister_inet6addr_notifier();
 569
 570         return status;
 571 }
 572
 573 static void __exit ocrdma_exit_module(void)
 574 {
 575         be_roce_unregister_driver(&ocrdma_drv);
 576         ocrdma_unregister_inet6addr_notifier();
 577 }
 578
 579 module_init(ocrdma_init_module);
 580 module_exit(ocrdma_exit_module);