drivers/infiniband/sw/rxe/rxe_verbs.c

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include "rxe.h"
  35 #include "rxe_loc.h"
  36 #include "rxe_queue.h"
  37
  38 static int rxe_query_device(struct ib_device *dev,
  39                             struct ib_device_attr *attr,
  40                             struct ib_udata *uhw)
  41 {
  42         struct rxe_dev *rxe = to_rdev(dev);
  43
  44         if (uhw->inlen || uhw->outlen)
  45                 return -EINVAL;
  46
  47         *attr = rxe->attr;
  48         return 0;
  49 }
  50
  51 static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
  52                                       u8 *active_width)
  53 {
  54         if (speed <= 1000) {
  55                 *active_width = IB_WIDTH_1X;
  56                 *active_speed = IB_SPEED_SDR;
  57         } else if (speed <= 10000) {
  58                 *active_width = IB_WIDTH_1X;
  59                 *active_speed = IB_SPEED_FDR10;
  60         } else if (speed <= 20000) {
  61                 *active_width = IB_WIDTH_4X;
  62                 *active_speed = IB_SPEED_DDR;
  63         } else if (speed <= 30000) {
  64                 *active_width = IB_WIDTH_4X;
  65                 *active_speed = IB_SPEED_QDR;
  66         } else if (speed <= 40000) {
  67                 *active_width = IB_WIDTH_4X;
  68                 *active_speed = IB_SPEED_FDR10;
  69         } else {
  70                 *active_width = IB_WIDTH_4X;
  71                 *active_speed = IB_SPEED_EDR;
  72         }
  73 }
  74
  75 static int rxe_query_port(struct ib_device *dev,
  76                           u8 port_num, struct ib_port_attr *attr)
  77 {
  78         struct rxe_dev *rxe = to_rdev(dev);
  79         struct rxe_port *port;
  80         u32 speed;
  81
  82         if (unlikely(port_num != 1)) {
  83                 pr_warn("invalid port_number %d\n", port_num);
  84                 goto err1;
  85         }
  86
  87         port = &rxe->port;
  88
  89         *attr = port->attr;
  90
  91         mutex_lock(&rxe->usdev_lock);
  92         if (rxe->ndev->ethtool_ops->get_link_ksettings) {
  93                 struct ethtool_link_ksettings ks;
  94
  95                 rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks);
  96                 speed = ks.base.speed;
  97         } else if (rxe->ndev->ethtool_ops->get_settings) {
  98                 struct ethtool_cmd cmd;
  99
 100                 rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
 101                 speed = cmd.speed;
 102         } else {
 103                 pr_warn("%s speed is unknown, defaulting to 1000\n", rxe->ndev->name);
 104                 speed = 1000;
 105         }
 106         rxe_eth_speed_to_ib_speed(speed, &attr->active_speed, &attr->active_width);
 107         mutex_unlock(&rxe->usdev_lock);
 108
 109         return 0;
 110
 111 err1:
 112         return -EINVAL;
 113 }
 114
 115 static int rxe_query_gid(struct ib_device *device,
 116                          u8 port_num, int index, union ib_gid *gid)
 117 {
 118         int ret;
 119
 120         if (index > RXE_PORT_GID_TBL_LEN)
 121                 return -EINVAL;
 122
 123         ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
 124         if (ret == -EAGAIN) {
 125                 memcpy(gid, &zgid, sizeof(*gid));
 126                 return 0;
 127         }
 128
 129         return ret;
 130 }
 131
 132 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
 133                        index, const union ib_gid *gid,
 134                        const struct ib_gid_attr *attr, void **context)
 135 {
 136         if (index >= RXE_PORT_GID_TBL_LEN)
 137                 return -EINVAL;
 138         return 0;
 139 }
 140
 141 static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
 142                        index, void **context)
 143 {
 144         if (index >= RXE_PORT_GID_TBL_LEN)
 145                 return -EINVAL;
 146         return 0;
 147 }
 148
 149 static struct net_device *rxe_get_netdev(struct ib_device *device,
 150                                          u8 port_num)
 151 {
 152         struct rxe_dev *rxe = to_rdev(device);
 153
 154         if (rxe->ndev) {
 155                 dev_hold(rxe->ndev);
 156                 return rxe->ndev;
 157         }
 158
 159         return NULL;
 160 }
 161
 162 static int rxe_query_pkey(struct ib_device *device,
 163                           u8 port_num, u16 index, u16 *pkey)
 164 {
 165         struct rxe_dev *rxe = to_rdev(device);
 166         struct rxe_port *port;
 167
 168         if (unlikely(port_num != 1)) {
 169                 dev_warn(device->dma_device, "invalid port_num = %d\n",
 170                          port_num);
 171                 goto err1;
 172         }
 173
 174         port = &rxe->port;
 175
 176         if (unlikely(index >= port->attr.pkey_tbl_len)) {
 177                 dev_warn(device->dma_device, "invalid index = %d\n",
 178                          index);
 179                 goto err1;
 180         }
 181
 182         *pkey = port->pkey_tbl[index];
 183         return 0;
 184
 185 err1:
 186         return -EINVAL;
 187 }
 188
 189 static int rxe_modify_device(struct ib_device *dev,
 190                              int mask, struct ib_device_modify *attr)
 191 {
 192         struct rxe_dev *rxe = to_rdev(dev);
 193
 194         if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 195                 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
 196
 197         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 198                 memcpy(rxe->ib_dev.node_desc,
 199                        attr->node_desc, sizeof(rxe->ib_dev.node_desc));
 200         }
 201
 202         return 0;
 203 }
 204
 205 static int rxe_modify_port(struct ib_device *dev,
 206                            u8 port_num, int mask, struct ib_port_modify *attr)
 207 {
 208         struct rxe_dev *rxe = to_rdev(dev);
 209         struct rxe_port *port;
 210
 211         if (unlikely(port_num != 1)) {
 212                 pr_warn("invalid port_num = %d\n", port_num);
 213                 goto err1;
 214         }
 215
 216         port = &rxe->port;
 217
 218         port->attr.port_cap_flags |= attr->set_port_cap_mask;
 219         port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
 220
 221         if (mask & IB_PORT_RESET_QKEY_CNTR)
 222                 port->attr.qkey_viol_cntr = 0;
 223
 224         return 0;
 225
 226 err1:
 227         return -EINVAL;
 228 }
 229
 230 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
 231                                                u8 port_num)
 232 {
 233         struct rxe_dev *rxe = to_rdev(dev);
 234
 235         return rxe->ifc_ops->link_layer(rxe, port_num);
 236 }
 237
 238 static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
 239                                               struct ib_udata *udata)
 240 {
 241         struct rxe_dev *rxe = to_rdev(dev);
 242         struct rxe_ucontext *uc;
 243
 244         uc = rxe_alloc(&rxe->uc_pool);
 245         return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
 246 }
 247
 248 static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
 249 {
 250         struct rxe_ucontext *uc = to_ruc(ibuc);
 251
 252         rxe_drop_ref(uc);
 253         return 0;
 254 }
 255
 256 static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
 257                               struct ib_port_immutable *immutable)
 258 {
 259         int err;
 260         struct ib_port_attr attr;
 261
 262         err = rxe_query_port(dev, port_num, &attr);
 263         if (err)
 264                 return err;
 265
 266         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 267         immutable->gid_tbl_len = attr.gid_tbl_len;
 268         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 269         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 270
 271         return 0;
 272 }
 273
 274 static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
 275                                   struct ib_ucontext *context,
 276                                   struct ib_udata *udata)
 277 {
 278         struct rxe_dev *rxe = to_rdev(dev);
 279         struct rxe_pd *pd;
 280
 281         pd = rxe_alloc(&rxe->pd_pool);
 282         return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
 283 }
 284
 285 static int rxe_dealloc_pd(struct ib_pd *ibpd)
 286 {
 287         struct rxe_pd *pd = to_rpd(ibpd);
 288
 289         rxe_drop_ref(pd);
 290         return 0;
 291 }
 292
 293 static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr,
 294                        struct rxe_av *av)
 295 {
 296         int err;
 297         union ib_gid sgid;
 298         struct ib_gid_attr sgid_attr;
 299
 300         err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num,
 301                                 attr->grh.sgid_index, &sgid,
 302                                 &sgid_attr);
 303         if (err) {
 304                 pr_err("Failed to query sgid. err = %d\n", err);
 305                 return err;
 306         }
 307
 308         err = rxe_av_from_attr(rxe, attr->port_num, av, attr);
 309         if (!err)
 310                 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
 311
 312         if (sgid_attr.ndev)
 313                 dev_put(sgid_attr.ndev);
 314         return err;
 315 }
 316
 317 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 318 {
 319         int err;
 320         struct rxe_dev *rxe = to_rdev(ibpd->device);
 321         struct rxe_pd *pd = to_rpd(ibpd);
 322         struct rxe_ah *ah;
 323
 324         err = rxe_av_chk_attr(rxe, attr);
 325         if (err)
 326                 goto err1;
 327
 328         ah = rxe_alloc(&rxe->ah_pool);
 329         if (!ah) {
 330                 err = -ENOMEM;
 331                 goto err1;
 332         }
 333
 334         rxe_add_ref(pd);
 335         ah->pd = pd;
 336
 337         err = rxe_init_av(rxe, attr, &ah->av);
 338         if (err)
 339                 goto err2;
 340
 341         return &ah->ibah;
 342
 343 err2:
 344         rxe_drop_ref(pd);
 345         rxe_drop_ref(ah);
 346 err1:
 347         return ERR_PTR(err);
 348 }
 349
 350 static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 351 {
 352         int err;
 353         struct rxe_dev *rxe = to_rdev(ibah->device);
 354         struct rxe_ah *ah = to_rah(ibah);
 355
 356         err = rxe_av_chk_attr(rxe, attr);
 357         if (err)
 358                 return err;
 359
 360         err = rxe_init_av(rxe, attr, &ah->av);
 361         if (err)
 362                 return err;
 363
 364         return 0;
 365 }
 366
 367 static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 368 {
 369         struct rxe_dev *rxe = to_rdev(ibah->device);
 370         struct rxe_ah *ah = to_rah(ibah);
 371
 372         rxe_av_to_attr(rxe, &ah->av, attr);
 373         return 0;
 374 }
 375
 376 static int rxe_destroy_ah(struct ib_ah *ibah)
 377 {
 378         struct rxe_ah *ah = to_rah(ibah);
 379
 380         rxe_drop_ref(ah->pd);
 381         rxe_drop_ref(ah);
 382         return 0;
 383 }
 384
 385 static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
 386 {
 387         int err;
 388         int i;
 389         u32 length;
 390         struct rxe_recv_wqe *recv_wqe;
 391         int num_sge = ibwr->num_sge;
 392
 393         if (unlikely(queue_full(rq->queue))) {
 394                 err = -ENOMEM;
 395                 goto err1;
 396         }
 397
 398         if (unlikely(num_sge > rq->max_sge)) {
 399                 err = -EINVAL;
 400                 goto err1;
 401         }
 402
 403         length = 0;
 404         for (i = 0; i < num_sge; i++)
 405                 length += ibwr->sg_list[i].length;
 406
 407         recv_wqe = producer_addr(rq->queue);
 408         recv_wqe->wr_id = ibwr->wr_id;
 409         recv_wqe->num_sge = num_sge;
 410
 411         memcpy(recv_wqe->dma.sge, ibwr->sg_list,
 412                num_sge * sizeof(struct ib_sge));
 413
 414         recv_wqe->dma.length            = length;
 415         recv_wqe->dma.resid             = length;
 416         recv_wqe->dma.num_sge           = num_sge;
 417         recv_wqe->dma.cur_sge           = 0;
 418         recv_wqe->dma.sge_offset        = 0;
 419
 420         /* make sure all changes to the work queue are written before we
 421          * update the producer pointer
 422          */
 423         smp_wmb();
 424
 425         advance_producer(rq->queue);
 426         return 0;
 427
 428 err1:
 429         return err;
 430 }
 431
 432 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
 433                                      struct ib_srq_init_attr *init,
 434                                      struct ib_udata *udata)
 435 {
 436         int err;
 437         struct rxe_dev *rxe = to_rdev(ibpd->device);
 438         struct rxe_pd *pd = to_rpd(ibpd);
 439         struct rxe_srq *srq;
 440         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 441
 442         err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
 443         if (err)
 444                 goto err1;
 445
 446         srq = rxe_alloc(&rxe->srq_pool);
 447         if (!srq) {
 448                 err = -ENOMEM;
 449                 goto err1;
 450         }
 451
 452         rxe_add_index(srq);
 453         rxe_add_ref(pd);
 454         srq->pd = pd;
 455
 456         err = rxe_srq_from_init(rxe, srq, init, context, udata);
 457         if (err)
 458                 goto err2;
 459
 460         return &srq->ibsrq;
 461
 462 err2:
 463         rxe_drop_ref(pd);
 464         rxe_drop_index(srq);
 465         rxe_drop_ref(srq);
 466 err1:
 467         return ERR_PTR(err);
 468 }
 469
 470 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 471                           enum ib_srq_attr_mask mask,
 472                           struct ib_udata *udata)
 473 {
 474         int err;
 475         struct rxe_srq *srq = to_rsrq(ibsrq);
 476         struct rxe_dev *rxe = to_rdev(ibsrq->device);
 477
 478         err = rxe_srq_chk_attr(rxe, srq, attr, mask);
 479         if (err)
 480                 goto err1;
 481
 482         err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
 483         if (err)
 484                 goto err1;
 485
 486         return 0;
 487
 488 err1:
 489         return err;
 490 }
 491
 492 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
 493 {
 494         struct rxe_srq *srq = to_rsrq(ibsrq);
 495
 496         if (srq->error)
 497                 return -EINVAL;
 498
 499         attr->max_wr = srq->rq.queue->buf->index_mask;
 500         attr->max_sge = srq->rq.max_sge;
 501         attr->srq_limit = srq->limit;
 502         return 0;
 503 }
 504
 505 static int rxe_destroy_srq(struct ib_srq *ibsrq)
 506 {
 507         struct rxe_srq *srq = to_rsrq(ibsrq);
 508
 509         if (srq->rq.queue)
 510                 rxe_queue_cleanup(srq->rq.queue);
 511
 512         rxe_drop_ref(srq->pd);
 513         rxe_drop_index(srq);
 514         rxe_drop_ref(srq);
 515
 516         return 0;
 517 }
 518
 519 static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 520                              struct ib_recv_wr **bad_wr)
 521 {
 522         int err = 0;
 523         unsigned long flags;
 524         struct rxe_srq *srq = to_rsrq(ibsrq);
 525
 526         spin_lock_irqsave(&srq->rq.producer_lock, flags);
 527
 528         while (wr) {
 529                 err = post_one_recv(&srq->rq, wr);
 530                 if (unlikely(err))
 531                         break;
 532                 wr = wr->next;
 533         }
 534
 535         spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
 536
 537         if (err)
 538                 *bad_wr = wr;
 539
 540         return err;
 541 }
 542
 543 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
 544                                    struct ib_qp_init_attr *init,
 545                                    struct ib_udata *udata)
 546 {
 547         int err;
 548         struct rxe_dev *rxe = to_rdev(ibpd->device);
 549         struct rxe_pd *pd = to_rpd(ibpd);
 550         struct rxe_qp *qp;
 551
 552         err = rxe_qp_chk_init(rxe, init);
 553         if (err)
 554                 goto err1;
 555
 556         qp = rxe_alloc(&rxe->qp_pool);
 557         if (!qp) {
 558                 err = -ENOMEM;
 559                 goto err1;
 560         }
 561
 562         if (udata) {
 563                 if (udata->inlen) {
 564                         err = -EINVAL;
 565                         goto err1;
 566                 }
 567                 qp->is_user = 1;
 568         }
 569
 570         rxe_add_index(qp);
 571
 572         err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
 573         if (err)
 574                 goto err2;
 575
 576         return &qp->ibqp;
 577
 578 err2:
 579         rxe_drop_index(qp);
 580         rxe_drop_ref(qp);
 581 err1:
 582         return ERR_PTR(err);
 583 }
 584
 585 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 586                          int mask, struct ib_udata *udata)
 587 {
 588         int err;
 589         struct rxe_dev *rxe = to_rdev(ibqp->device);
 590         struct rxe_qp *qp = to_rqp(ibqp);
 591
 592         err = rxe_qp_chk_attr(rxe, qp, attr, mask);
 593         if (err)
 594                 goto err1;
 595
 596         err = rxe_qp_from_attr(qp, attr, mask, udata);
 597         if (err)
 598                 goto err1;
 599
 600         return 0;
 601
 602 err1:
 603         return err;
 604 }
 605
 606 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 607                         int mask, struct ib_qp_init_attr *init)
 608 {
 609         struct rxe_qp *qp = to_rqp(ibqp);
 610
 611         rxe_qp_to_init(qp, init);
 612         rxe_qp_to_attr(qp, attr, mask);
 613
 614         return 0;
 615 }
 616
 617 static int rxe_destroy_qp(struct ib_qp *ibqp)
 618 {
 619         struct rxe_qp *qp = to_rqp(ibqp);
 620
 621         rxe_qp_destroy(qp);
 622         rxe_drop_index(qp);
 623         rxe_drop_ref(qp);
 624         return 0;
 625 }
 626
 627 static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 628                             unsigned int mask, unsigned int length)
 629 {
 630         int num_sge = ibwr->num_sge;
 631         struct rxe_sq *sq = &qp->sq;
 632
 633         if (unlikely(num_sge > sq->max_sge))
 634                 goto err1;
 635
 636         if (unlikely(mask & WR_ATOMIC_MASK)) {
 637                 if (length < 8)
 638                         goto err1;
 639
 640                 if (atomic_wr(ibwr)->remote_addr & 0x7)
 641                         goto err1;
 642         }
 643
 644         if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
 645                      (length > sq->max_inline)))
 646                 goto err1;
 647
 648         return 0;
 649
 650 err1:
 651         return -EINVAL;
 652 }
 653
 654 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
 655                          struct ib_send_wr *ibwr)
 656 {
 657         wr->wr_id = ibwr->wr_id;
 658         wr->num_sge = ibwr->num_sge;
 659         wr->opcode = ibwr->opcode;
 660         wr->send_flags = ibwr->send_flags;
 661
 662         if (qp_type(qp) == IB_QPT_UD ||
 663             qp_type(qp) == IB_QPT_SMI ||
 664             qp_type(qp) == IB_QPT_GSI) {
 665                 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
 666                 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
 667                 if (qp_type(qp) == IB_QPT_GSI)
 668                         wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
 669                 if (wr->opcode == IB_WR_SEND_WITH_IMM)
 670                         wr->ex.imm_data = ibwr->ex.imm_data;
 671         } else {
 672                 switch (wr->opcode) {
 673                 case IB_WR_RDMA_WRITE_WITH_IMM:
 674                         wr->ex.imm_data = ibwr->ex.imm_data;
 675                 case IB_WR_RDMA_READ:
 676                 case IB_WR_RDMA_WRITE:
 677                         wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
 678                         wr->wr.rdma.rkey        = rdma_wr(ibwr)->rkey;
 679                         break;
 680                 case IB_WR_SEND_WITH_IMM:
 681                         wr->ex.imm_data = ibwr->ex.imm_data;
 682                         break;
 683                 case IB_WR_SEND_WITH_INV:
 684                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 685                         break;
 686                 case IB_WR_ATOMIC_CMP_AND_SWP:
 687                 case IB_WR_ATOMIC_FETCH_AND_ADD:
 688                         wr->wr.atomic.remote_addr =
 689                                 atomic_wr(ibwr)->remote_addr;
 690                         wr->wr.atomic.compare_add =
 691                                 atomic_wr(ibwr)->compare_add;
 692                         wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
 693                         wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
 694                         break;
 695                 case IB_WR_LOCAL_INV:
 696                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 697                 break;
 698                 case IB_WR_REG_MR:
 699                         wr->wr.reg.mr = reg_wr(ibwr)->mr;
 700                         wr->wr.reg.key = reg_wr(ibwr)->key;
 701                         wr->wr.reg.access = reg_wr(ibwr)->access;
 702                 break;
 703                 default:
 704                         break;
 705                 }
 706         }
 707 }
 708
 709 static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 710                          unsigned int mask, unsigned int length,
 711                          struct rxe_send_wqe *wqe)
 712 {
 713         int num_sge = ibwr->num_sge;
 714         struct ib_sge *sge;
 715         int i;
 716         u8 *p;
 717
 718         init_send_wr(qp, &wqe->wr, ibwr);
 719
 720         if (qp_type(qp) == IB_QPT_UD ||
 721             qp_type(qp) == IB_QPT_SMI ||
 722             qp_type(qp) == IB_QPT_GSI)
 723                 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
 724
 725         if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
 726                 p = wqe->dma.inline_data;
 727
 728                 sge = ibwr->sg_list;
 729                 for (i = 0; i < num_sge; i++, sge++) {
 730                         if (qp->is_user && copy_from_user(p, (__user void *)
 731                                             (uintptr_t)sge->addr, sge->length))
 732                                 return -EFAULT;
 733
 734                         else if (!qp->is_user)
 735                                 memcpy(p, (void *)(uintptr_t)sge->addr,
 736                                        sge->length);
 737
 738                         p += sge->length;
 739                 }
 740         } else if (mask & WR_REG_MASK) {
 741                 wqe->mask = mask;
 742                 wqe->state = wqe_state_posted;
 743                 return 0;
 744         } else
 745                 memcpy(wqe->dma.sge, ibwr->sg_list,
 746                        num_sge * sizeof(struct ib_sge));
 747
 748         wqe->iova               = (mask & WR_ATOMIC_MASK) ?
 749                                         atomic_wr(ibwr)->remote_addr :
 750                                         rdma_wr(ibwr)->remote_addr;
 751         wqe->mask               = mask;
 752         wqe->dma.length         = length;
 753         wqe->dma.resid          = length;
 754         wqe->dma.num_sge        = num_sge;
 755         wqe->dma.cur_sge        = 0;
 756         wqe->dma.sge_offset     = 0;
 757         wqe->state              = wqe_state_posted;
 758         wqe->ssn                = atomic_add_return(1, &qp->ssn);
 759
 760         return 0;
 761 }
 762
 763 static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 764                          unsigned mask, u32 length)
 765 {
 766         int err;
 767         struct rxe_sq *sq = &qp->sq;
 768         struct rxe_send_wqe *send_wqe;
 769         unsigned long flags;
 770
 771         err = validate_send_wr(qp, ibwr, mask, length);
 772         if (err)
 773                 return err;
 774
 775         spin_lock_irqsave(&qp->sq.sq_lock, flags);
 776
 777         if (unlikely(queue_full(sq->queue))) {
 778                 err = -ENOMEM;
 779                 goto err1;
 780         }
 781
 782         send_wqe = producer_addr(sq->queue);
 783
 784         err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
 785         if (unlikely(err))
 786                 goto err1;
 787
 788         /*
 789          * make sure all changes to the work queue are
 790          * written before we update the producer pointer
 791          */
 792         smp_wmb();
 793
 794         advance_producer(sq->queue);
 795         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 796
 797         return 0;
 798
 799 err1:
 800         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 801         return err;
 802 }
 803
 804 static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 805                          struct ib_send_wr **bad_wr)
 806 {
 807         int err = 0;
 808         struct rxe_qp *qp = to_rqp(ibqp);
 809         unsigned int mask;
 810         unsigned int length = 0;
 811         int i;
 812         int must_sched;
 813
 814         if (unlikely(!qp->valid)) {
 815                 *bad_wr = wr;
 816                 return -EINVAL;
 817         }
 818
 819         if (unlikely(qp->req.state < QP_STATE_READY)) {
 820                 *bad_wr = wr;
 821                 return -EINVAL;
 822         }
 823
 824         while (wr) {
 825                 mask = wr_opcode_mask(wr->opcode, qp);
 826                 if (unlikely(!mask)) {
 827                         err = -EINVAL;
 828                         *bad_wr = wr;
 829                         break;
 830                 }
 831
 832                 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
 833                              !(mask & WR_INLINE_MASK))) {
 834                         err = -EINVAL;
 835                         *bad_wr = wr;
 836                         break;
 837                 }
 838
 839                 length = 0;
 840                 for (i = 0; i < wr->num_sge; i++)
 841                         length += wr->sg_list[i].length;
 842
 843                 err = post_one_send(qp, wr, mask, length);
 844
 845                 if (err) {
 846                         *bad_wr = wr;
 847                         break;
 848                 }
 849                 wr = wr->next;
 850         }
 851
 852         /*
 853          * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
 854          * and the requester call ip_local_out_sk() that takes spin_lock_bh.
 855          */
 856         must_sched = (qp_type(qp) == IB_QPT_GSI) ||
 857                         (queue_count(qp->sq.queue) > 1);
 858
 859         rxe_run_task(&qp->req.task, must_sched);
 860
 861         return err;
 862 }
 863
 864 static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 865                          struct ib_recv_wr **bad_wr)
 866 {
 867         int err = 0;
 868         struct rxe_qp *qp = to_rqp(ibqp);
 869         struct rxe_rq *rq = &qp->rq;
 870         unsigned long flags;
 871
 872         if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
 873                 *bad_wr = wr;
 874                 err = -EINVAL;
 875                 goto err1;
 876         }
 877
 878         if (unlikely(qp->srq)) {
 879                 *bad_wr = wr;
 880                 err = -EINVAL;
 881                 goto err1;
 882         }
 883
 884         spin_lock_irqsave(&rq->producer_lock, flags);
 885
 886         while (wr) {
 887                 err = post_one_recv(rq, wr);
 888                 if (unlikely(err)) {
 889                         *bad_wr = wr;
 890                         break;
 891                 }
 892                 wr = wr->next;
 893         }
 894
 895         spin_unlock_irqrestore(&rq->producer_lock, flags);
 896
 897 err1:
 898         return err;
 899 }
 900
 901 static struct ib_cq *rxe_create_cq(struct ib_device *dev,
 902                                    const struct ib_cq_init_attr *attr,
 903                                    struct ib_ucontext *context,
 904                                    struct ib_udata *udata)
 905 {
 906         int err;
 907         struct rxe_dev *rxe = to_rdev(dev);
 908         struct rxe_cq *cq;
 909
 910         if (attr->flags)
 911                 return ERR_PTR(-EINVAL);
 912
 913         err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
 914         if (err)
 915                 goto err1;
 916
 917         cq = rxe_alloc(&rxe->cq_pool);
 918         if (!cq) {
 919                 err = -ENOMEM;
 920                 goto err1;
 921         }
 922
 923         err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
 924                                context, udata);
 925         if (err)
 926                 goto err2;
 927
 928         return &cq->ibcq;
 929
 930 err2:
 931         rxe_drop_ref(cq);
 932 err1:
 933         return ERR_PTR(err);
 934 }
 935
 936 static int rxe_destroy_cq(struct ib_cq *ibcq)
 937 {
 938         struct rxe_cq *cq = to_rcq(ibcq);
 939
 940         rxe_drop_ref(cq);
 941         return 0;
 942 }
 943
 944 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
 945 {
 946         int err;
 947         struct rxe_cq *cq = to_rcq(ibcq);
 948         struct rxe_dev *rxe = to_rdev(ibcq->device);
 949
 950         err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
 951         if (err)
 952                 goto err1;
 953
 954         err = rxe_cq_resize_queue(cq, cqe, udata);
 955         if (err)
 956                 goto err1;
 957
 958         return 0;
 959
 960 err1:
 961         return err;
 962 }
 963
 964 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 965 {
 966         int i;
 967         struct rxe_cq *cq = to_rcq(ibcq);
 968         struct rxe_cqe *cqe;
 969         unsigned long flags;
 970
 971         spin_lock_irqsave(&cq->cq_lock, flags);
 972         for (i = 0; i < num_entries; i++) {
 973                 cqe = queue_head(cq->queue);
 974                 if (!cqe)
 975                         break;
 976
 977                 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
 978                 advance_consumer(cq->queue);
 979         }
 980         spin_unlock_irqrestore(&cq->cq_lock, flags);
 981
 982         return i;
 983 }
 984
 985 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
 986 {
 987         struct rxe_cq *cq = to_rcq(ibcq);
 988         int count = queue_count(cq->queue);
 989
 990         return (count > wc_cnt) ? wc_cnt : count;
 991 }
 992
 993 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
 994 {
 995         struct rxe_cq *cq = to_rcq(ibcq);
 996
 997         if (cq->notify != IB_CQ_NEXT_COMP)
 998                 cq->notify = flags & IB_CQ_SOLICITED_MASK;
 999
1000         return 0;
1001 }
1002
1003 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1004 {
1005         struct rxe_dev *rxe = to_rdev(ibpd->device);
1006         struct rxe_pd *pd = to_rpd(ibpd);
1007         struct rxe_mem *mr;
1008         int err;
1009
1010         mr = rxe_alloc(&rxe->mr_pool);
1011         if (!mr) {
1012                 err = -ENOMEM;
1013                 goto err1;
1014         }
1015
1016         rxe_add_index(mr);
1017
1018         rxe_add_ref(pd);
1019
1020         err = rxe_mem_init_dma(rxe, pd, access, mr);
1021         if (err)
1022                 goto err2;
1023
1024         return &mr->ibmr;
1025
1026 err2:
1027         rxe_drop_ref(pd);
1028         rxe_drop_index(mr);
1029         rxe_drop_ref(mr);
1030 err1:
1031         return ERR_PTR(err);
1032 }
1033
1034 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1035                                      u64 start,
1036                                      u64 length,
1037                                      u64 iova,
1038                                      int access, struct ib_udata *udata)
1039 {
1040         int err;
1041         struct rxe_dev *rxe = to_rdev(ibpd->device);
1042         struct rxe_pd *pd = to_rpd(ibpd);
1043         struct rxe_mem *mr;
1044
1045         mr = rxe_alloc(&rxe->mr_pool);
1046         if (!mr) {
1047                 err = -ENOMEM;
1048                 goto err2;
1049         }
1050
1051         rxe_add_index(mr);
1052
1053         rxe_add_ref(pd);
1054
1055         err = rxe_mem_init_user(rxe, pd, start, length, iova,
1056                                 access, udata, mr);
1057         if (err)
1058                 goto err3;
1059
1060         return &mr->ibmr;
1061
1062 err3:
1063         rxe_drop_ref(pd);
1064         rxe_drop_index(mr);
1065         rxe_drop_ref(mr);
1066 err2:
1067         return ERR_PTR(err);
1068 }
1069
1070 static int rxe_dereg_mr(struct ib_mr *ibmr)
1071 {
1072         struct rxe_mem *mr = to_rmr(ibmr);
1073
1074         mr->state = RXE_MEM_STATE_ZOMBIE;
1075         rxe_drop_ref(mr->pd);
1076         rxe_drop_index(mr);
1077         rxe_drop_ref(mr);
1078         return 0;
1079 }
1080
1081 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1082                                   enum ib_mr_type mr_type,
1083                                   u32 max_num_sg)
1084 {
1085         struct rxe_dev *rxe = to_rdev(ibpd->device);
1086         struct rxe_pd *pd = to_rpd(ibpd);
1087         struct rxe_mem *mr;
1088         int err;
1089
1090         if (mr_type != IB_MR_TYPE_MEM_REG)
1091                 return ERR_PTR(-EINVAL);
1092
1093         mr = rxe_alloc(&rxe->mr_pool);
1094         if (!mr) {
1095                 err = -ENOMEM;
1096                 goto err1;
1097         }
1098
1099         rxe_add_index(mr);
1100
1101         rxe_add_ref(pd);
1102
1103         err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1104         if (err)
1105                 goto err2;
1106
1107         return &mr->ibmr;
1108
1109 err2:
1110         rxe_drop_ref(pd);
1111         rxe_drop_index(mr);
1112         rxe_drop_ref(mr);
1113 err1:
1114         return ERR_PTR(err);
1115 }
1116
1117 static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1118 {
1119         struct rxe_mem *mr = to_rmr(ibmr);
1120         struct rxe_map *map;
1121         struct rxe_phys_buf *buf;
1122
1123         if (unlikely(mr->nbuf == mr->num_buf))
1124                 return -ENOMEM;
1125
1126         map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1127         buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1128
1129         buf->addr = addr;
1130         buf->size = ibmr->page_size;
1131         mr->nbuf++;
1132
1133         return 0;
1134 }
1135
1136 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
1137                          unsigned int *sg_offset)
1138 {
1139         struct rxe_mem *mr = to_rmr(ibmr);
1140         int n;
1141
1142         mr->nbuf = 0;
1143
1144         n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1145
1146         mr->va = ibmr->iova;
1147         mr->iova = ibmr->iova;
1148         mr->length = ibmr->length;
1149         mr->page_shift = ilog2(ibmr->page_size);
1150         mr->page_mask = ibmr->page_size - 1;
1151         mr->offset = mr->iova & mr->page_mask;
1152
1153         return n;
1154 }
1155
1156 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1157 {
1158         int err;
1159         struct rxe_dev *rxe = to_rdev(ibqp->device);
1160         struct rxe_qp *qp = to_rqp(ibqp);
1161         struct rxe_mc_grp *grp;
1162
1163         /* takes a ref on grp if successful */
1164         err = rxe_mcast_get_grp(rxe, mgid, &grp);
1165         if (err)
1166                 return err;
1167
1168         err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1169
1170         rxe_drop_ref(grp);
1171         return err;
1172 }
1173
1174 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1175 {
1176         struct rxe_dev *rxe = to_rdev(ibqp->device);
1177         struct rxe_qp *qp = to_rqp(ibqp);
1178
1179         return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1180 }
1181
1182 static ssize_t rxe_show_parent(struct device *device,
1183                                struct device_attribute *attr, char *buf)
1184 {
1185         struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1186                                            ib_dev.dev);
1187         char *name;
1188
1189         name = rxe->ifc_ops->parent_name(rxe, 1);
1190         return snprintf(buf, 16, "%s\n", name);
1191 }
1192
1193 static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1194
1195 static struct device_attribute *rxe_dev_attributes[] = {
1196         &dev_attr_parent,
1197 };
1198
1199 int rxe_register_device(struct rxe_dev *rxe)
1200 {
1201         int err;
1202         int i;
1203         struct ib_device *dev = &rxe->ib_dev;
1204
1205         strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1206         strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1207
1208         dev->owner = THIS_MODULE;
1209         dev->node_type = RDMA_NODE_IB_CA;
1210         dev->phys_port_cnt = 1;
1211         dev->num_comp_vectors = RXE_NUM_COMP_VECTORS;
1212         dev->dma_device = rxe->ifc_ops->dma_device(rxe);
1213         dev->local_dma_lkey = 0;
1214         dev->node_guid = rxe->ifc_ops->node_guid(rxe);
1215         dev->dma_ops = &rxe_dma_mapping_ops;
1216
1217         dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1218         dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1219             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1220             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1221             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1222             | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1223             | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1224             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1225             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1226             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1227             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1228             | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1229             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1230             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1231             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1232             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1233             | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1234             | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1235             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1236             | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1237             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1238             | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1239             | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1240             | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1241             | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1242             | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1243             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1244             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1245             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1246             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1247             | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1248             | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1249             ;
1250
1251         dev->query_device = rxe_query_device;
1252         dev->modify_device = rxe_modify_device;
1253         dev->query_port = rxe_query_port;
1254         dev->modify_port = rxe_modify_port;
1255         dev->get_link_layer = rxe_get_link_layer;
1256         dev->query_gid = rxe_query_gid;
1257         dev->get_netdev = rxe_get_netdev;
1258         dev->add_gid = rxe_add_gid;
1259         dev->del_gid = rxe_del_gid;
1260         dev->query_pkey = rxe_query_pkey;
1261         dev->alloc_ucontext = rxe_alloc_ucontext;
1262         dev->dealloc_ucontext = rxe_dealloc_ucontext;
1263         dev->mmap = rxe_mmap;
1264         dev->get_port_immutable = rxe_port_immutable;
1265         dev->alloc_pd = rxe_alloc_pd;
1266         dev->dealloc_pd = rxe_dealloc_pd;
1267         dev->create_ah = rxe_create_ah;
1268         dev->modify_ah = rxe_modify_ah;
1269         dev->query_ah = rxe_query_ah;
1270         dev->destroy_ah = rxe_destroy_ah;
1271         dev->create_srq = rxe_create_srq;
1272         dev->modify_srq = rxe_modify_srq;
1273         dev->query_srq = rxe_query_srq;
1274         dev->destroy_srq = rxe_destroy_srq;
1275         dev->post_srq_recv = rxe_post_srq_recv;
1276         dev->create_qp = rxe_create_qp;
1277         dev->modify_qp = rxe_modify_qp;
1278         dev->query_qp = rxe_query_qp;
1279         dev->destroy_qp = rxe_destroy_qp;
1280         dev->post_send = rxe_post_send;
1281         dev->post_recv = rxe_post_recv;
1282         dev->create_cq = rxe_create_cq;
1283         dev->destroy_cq = rxe_destroy_cq;
1284         dev->resize_cq = rxe_resize_cq;
1285         dev->poll_cq = rxe_poll_cq;
1286         dev->peek_cq = rxe_peek_cq;
1287         dev->req_notify_cq = rxe_req_notify_cq;
1288         dev->get_dma_mr = rxe_get_dma_mr;
1289         dev->reg_user_mr = rxe_reg_user_mr;
1290         dev->dereg_mr = rxe_dereg_mr;
1291         dev->alloc_mr = rxe_alloc_mr;
1292         dev->map_mr_sg = rxe_map_mr_sg;
1293         dev->attach_mcast = rxe_attach_mcast;
1294         dev->detach_mcast = rxe_detach_mcast;
1295
1296         err = ib_register_device(dev, NULL);
1297         if (err) {
1298                 pr_warn("rxe_register_device failed, err = %d\n", err);
1299                 goto err1;
1300         }
1301
1302         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1303                 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1304                 if (err) {
1305                         pr_warn("device_create_file failed, i = %d, err = %d\n",
1306                                 i, err);
1307                         goto err2;
1308                 }
1309         }
1310
1311         return 0;
1312
1313 err2:
1314         ib_unregister_device(dev);
1315 err1:
1316         return err;
1317 }
1318
1319 int rxe_unregister_device(struct rxe_dev *rxe)
1320 {
1321         int i;
1322         struct ib_device *dev = &rxe->ib_dev;
1323
1324         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1325                 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1326
1327         ib_unregister_device(dev);
1328
1329         return 0;
1330 }