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",
 104                         rxe->ndev->name);
 105                 speed = 1000;
 106         }
 107         rxe_eth_speed_to_ib_speed(speed, &attr->active_speed,
 108                                   &attr->active_width);
 109         mutex_unlock(&rxe->usdev_lock);
 110
 111         return 0;
 112
 113 err1:
 114         return -EINVAL;
 115 }
 116
 117 static int rxe_query_gid(struct ib_device *device,
 118                          u8 port_num, int index, union ib_gid *gid)
 119 {
 120         int ret;
 121
 122         if (index > RXE_PORT_GID_TBL_LEN)
 123                 return -EINVAL;
 124
 125         ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
 126         if (ret == -EAGAIN) {
 127                 memcpy(gid, &zgid, sizeof(*gid));
 128                 return 0;
 129         }
 130
 131         return ret;
 132 }
 133
 134 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
 135                        index, const union ib_gid *gid,
 136                        const struct ib_gid_attr *attr, void **context)
 137 {
 138         if (index >= RXE_PORT_GID_TBL_LEN)
 139                 return -EINVAL;
 140         return 0;
 141 }
 142
 143 static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
 144                        index, void **context)
 145 {
 146         if (index >= RXE_PORT_GID_TBL_LEN)
 147                 return -EINVAL;
 148         return 0;
 149 }
 150
 151 static struct net_device *rxe_get_netdev(struct ib_device *device,
 152                                          u8 port_num)
 153 {
 154         struct rxe_dev *rxe = to_rdev(device);
 155
 156         if (rxe->ndev) {
 157                 dev_hold(rxe->ndev);
 158                 return rxe->ndev;
 159         }
 160
 161         return NULL;
 162 }
 163
 164 static int rxe_query_pkey(struct ib_device *device,
 165                           u8 port_num, u16 index, u16 *pkey)
 166 {
 167         struct rxe_dev *rxe = to_rdev(device);
 168         struct rxe_port *port;
 169
 170         if (unlikely(port_num != 1)) {
 171                 dev_warn(device->dma_device, "invalid port_num = %d\n",
 172                          port_num);
 173                 goto err1;
 174         }
 175
 176         port = &rxe->port;
 177
 178         if (unlikely(index >= port->attr.pkey_tbl_len)) {
 179                 dev_warn(device->dma_device, "invalid index = %d\n",
 180                          index);
 181                 goto err1;
 182         }
 183
 184         *pkey = port->pkey_tbl[index];
 185         return 0;
 186
 187 err1:
 188         return -EINVAL;
 189 }
 190
 191 static int rxe_modify_device(struct ib_device *dev,
 192                              int mask, struct ib_device_modify *attr)
 193 {
 194         struct rxe_dev *rxe = to_rdev(dev);
 195
 196         if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 197                 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
 198
 199         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 200                 memcpy(rxe->ib_dev.node_desc,
 201                        attr->node_desc, sizeof(rxe->ib_dev.node_desc));
 202         }
 203
 204         return 0;
 205 }
 206
 207 static int rxe_modify_port(struct ib_device *dev,
 208                            u8 port_num, int mask, struct ib_port_modify *attr)
 209 {
 210         struct rxe_dev *rxe = to_rdev(dev);
 211         struct rxe_port *port;
 212
 213         if (unlikely(port_num != 1)) {
 214                 pr_warn("invalid port_num = %d\n", port_num);
 215                 goto err1;
 216         }
 217
 218         port = &rxe->port;
 219
 220         port->attr.port_cap_flags |= attr->set_port_cap_mask;
 221         port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
 222
 223         if (mask & IB_PORT_RESET_QKEY_CNTR)
 224                 port->attr.qkey_viol_cntr = 0;
 225
 226         return 0;
 227
 228 err1:
 229         return -EINVAL;
 230 }
 231
 232 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
 233                                                u8 port_num)
 234 {
 235         struct rxe_dev *rxe = to_rdev(dev);
 236
 237         return rxe->ifc_ops->link_layer(rxe, port_num);
 238 }
 239
 240 static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
 241                                               struct ib_udata *udata)
 242 {
 243         struct rxe_dev *rxe = to_rdev(dev);
 244         struct rxe_ucontext *uc;
 245
 246         uc = rxe_alloc(&rxe->uc_pool);
 247         return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
 248 }
 249
 250 static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
 251 {
 252         struct rxe_ucontext *uc = to_ruc(ibuc);
 253
 254         rxe_drop_ref(uc);
 255         return 0;
 256 }
 257
 258 static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
 259                               struct ib_port_immutable *immutable)
 260 {
 261         int err;
 262         struct ib_port_attr attr;
 263
 264         err = rxe_query_port(dev, port_num, &attr);
 265         if (err)
 266                 return err;
 267
 268         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 269         immutable->gid_tbl_len = attr.gid_tbl_len;
 270         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 271         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 272
 273         return 0;
 274 }
 275
 276 static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
 277                                   struct ib_ucontext *context,
 278                                   struct ib_udata *udata)
 279 {
 280         struct rxe_dev *rxe = to_rdev(dev);
 281         struct rxe_pd *pd;
 282
 283         pd = rxe_alloc(&rxe->pd_pool);
 284         return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
 285 }
 286
 287 static int rxe_dealloc_pd(struct ib_pd *ibpd)
 288 {
 289         struct rxe_pd *pd = to_rpd(ibpd);
 290
 291         rxe_drop_ref(pd);
 292         return 0;
 293 }
 294
 295 static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr,
 296                        struct rxe_av *av)
 297 {
 298         int err;
 299         union ib_gid sgid;
 300         struct ib_gid_attr sgid_attr;
 301
 302         err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num,
 303                                 attr->grh.sgid_index, &sgid,
 304                                 &sgid_attr);
 305         if (err) {
 306                 pr_err("Failed to query sgid. err = %d\n", err);
 307                 return err;
 308         }
 309
 310         err = rxe_av_from_attr(rxe, attr->port_num, av, attr);
 311         if (!err)
 312                 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
 313
 314         if (sgid_attr.ndev)
 315                 dev_put(sgid_attr.ndev);
 316         return err;
 317 }
 318
 319 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 320 {
 321         int err;
 322         struct rxe_dev *rxe = to_rdev(ibpd->device);
 323         struct rxe_pd *pd = to_rpd(ibpd);
 324         struct rxe_ah *ah;
 325
 326         err = rxe_av_chk_attr(rxe, attr);
 327         if (err)
 328                 goto err1;
 329
 330         ah = rxe_alloc(&rxe->ah_pool);
 331         if (!ah) {
 332                 err = -ENOMEM;
 333                 goto err1;
 334         }
 335
 336         rxe_add_ref(pd);
 337         ah->pd = pd;
 338
 339         err = rxe_init_av(rxe, attr, &ah->av);
 340         if (err)
 341                 goto err2;
 342
 343         return &ah->ibah;
 344
 345 err2:
 346         rxe_drop_ref(pd);
 347         rxe_drop_ref(ah);
 348 err1:
 349         return ERR_PTR(err);
 350 }
 351
 352 static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 353 {
 354         int err;
 355         struct rxe_dev *rxe = to_rdev(ibah->device);
 356         struct rxe_ah *ah = to_rah(ibah);
 357
 358         err = rxe_av_chk_attr(rxe, attr);
 359         if (err)
 360                 return err;
 361
 362         err = rxe_init_av(rxe, attr, &ah->av);
 363         if (err)
 364                 return err;
 365
 366         return 0;
 367 }
 368
 369 static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 370 {
 371         struct rxe_dev *rxe = to_rdev(ibah->device);
 372         struct rxe_ah *ah = to_rah(ibah);
 373
 374         rxe_av_to_attr(rxe, &ah->av, attr);
 375         return 0;
 376 }
 377
 378 static int rxe_destroy_ah(struct ib_ah *ibah)
 379 {
 380         struct rxe_ah *ah = to_rah(ibah);
 381
 382         rxe_drop_ref(ah->pd);
 383         rxe_drop_ref(ah);
 384         return 0;
 385 }
 386
 387 static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
 388 {
 389         int err;
 390         int i;
 391         u32 length;
 392         struct rxe_recv_wqe *recv_wqe;
 393         int num_sge = ibwr->num_sge;
 394
 395         if (unlikely(queue_full(rq->queue))) {
 396                 err = -ENOMEM;
 397                 goto err1;
 398         }
 399
 400         if (unlikely(num_sge > rq->max_sge)) {
 401                 err = -EINVAL;
 402                 goto err1;
 403         }
 404
 405         length = 0;
 406         for (i = 0; i < num_sge; i++)
 407                 length += ibwr->sg_list[i].length;
 408
 409         recv_wqe = producer_addr(rq->queue);
 410         recv_wqe->wr_id = ibwr->wr_id;
 411         recv_wqe->num_sge = num_sge;
 412
 413         memcpy(recv_wqe->dma.sge, ibwr->sg_list,
 414                num_sge * sizeof(struct ib_sge));
 415
 416         recv_wqe->dma.length            = length;
 417         recv_wqe->dma.resid             = length;
 418         recv_wqe->dma.num_sge           = num_sge;
 419         recv_wqe->dma.cur_sge           = 0;
 420         recv_wqe->dma.sge_offset        = 0;
 421
 422         /* make sure all changes to the work queue are written before we
 423          * update the producer pointer
 424          */
 425         smp_wmb();
 426
 427         advance_producer(rq->queue);
 428         return 0;
 429
 430 err1:
 431         return err;
 432 }
 433
 434 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
 435                                      struct ib_srq_init_attr *init,
 436                                      struct ib_udata *udata)
 437 {
 438         int err;
 439         struct rxe_dev *rxe = to_rdev(ibpd->device);
 440         struct rxe_pd *pd = to_rpd(ibpd);
 441         struct rxe_srq *srq;
 442         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 443
 444         err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
 445         if (err)
 446                 goto err1;
 447
 448         srq = rxe_alloc(&rxe->srq_pool);
 449         if (!srq) {
 450                 err = -ENOMEM;
 451                 goto err1;
 452         }
 453
 454         rxe_add_index(srq);
 455         rxe_add_ref(pd);
 456         srq->pd = pd;
 457
 458         err = rxe_srq_from_init(rxe, srq, init, context, udata);
 459         if (err)
 460                 goto err2;
 461
 462         return &srq->ibsrq;
 463
 464 err2:
 465         rxe_drop_ref(pd);
 466         rxe_drop_index(srq);
 467         rxe_drop_ref(srq);
 468 err1:
 469         return ERR_PTR(err);
 470 }
 471
 472 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 473                           enum ib_srq_attr_mask mask,
 474                           struct ib_udata *udata)
 475 {
 476         int err;
 477         struct rxe_srq *srq = to_rsrq(ibsrq);
 478         struct rxe_dev *rxe = to_rdev(ibsrq->device);
 479
 480         err = rxe_srq_chk_attr(rxe, srq, attr, mask);
 481         if (err)
 482                 goto err1;
 483
 484         err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
 485         if (err)
 486                 goto err1;
 487
 488         return 0;
 489
 490 err1:
 491         return err;
 492 }
 493
 494 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
 495 {
 496         struct rxe_srq *srq = to_rsrq(ibsrq);
 497
 498         if (srq->error)
 499                 return -EINVAL;
 500
 501         attr->max_wr = srq->rq.queue->buf->index_mask;
 502         attr->max_sge = srq->rq.max_sge;
 503         attr->srq_limit = srq->limit;
 504         return 0;
 505 }
 506
 507 static int rxe_destroy_srq(struct ib_srq *ibsrq)
 508 {
 509         struct rxe_srq *srq = to_rsrq(ibsrq);
 510
 511         if (srq->rq.queue)
 512                 rxe_queue_cleanup(srq->rq.queue);
 513
 514         rxe_drop_ref(srq->pd);
 515         rxe_drop_index(srq);
 516         rxe_drop_ref(srq);
 517
 518         return 0;
 519 }
 520
 521 static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 522                              struct ib_recv_wr **bad_wr)
 523 {
 524         int err = 0;
 525         unsigned long flags;
 526         struct rxe_srq *srq = to_rsrq(ibsrq);
 527
 528         spin_lock_irqsave(&srq->rq.producer_lock, flags);
 529
 530         while (wr) {
 531                 err = post_one_recv(&srq->rq, wr);
 532                 if (unlikely(err))
 533                         break;
 534                 wr = wr->next;
 535         }
 536
 537         spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
 538
 539         if (err)
 540                 *bad_wr = wr;
 541
 542         return err;
 543 }
 544
 545 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
 546                                    struct ib_qp_init_attr *init,
 547                                    struct ib_udata *udata)
 548 {
 549         int err;
 550         struct rxe_dev *rxe = to_rdev(ibpd->device);
 551         struct rxe_pd *pd = to_rpd(ibpd);
 552         struct rxe_qp *qp;
 553
 554         err = rxe_qp_chk_init(rxe, init);
 555         if (err)
 556                 goto err1;
 557
 558         qp = rxe_alloc(&rxe->qp_pool);
 559         if (!qp) {
 560                 err = -ENOMEM;
 561                 goto err1;
 562         }
 563
 564         if (udata) {
 565                 if (udata->inlen) {
 566                         err = -EINVAL;
 567                         goto err1;
 568                 }
 569                 qp->is_user = 1;
 570         }
 571
 572         rxe_add_index(qp);
 573
 574         err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
 575         if (err)
 576                 goto err2;
 577
 578         return &qp->ibqp;
 579
 580 err2:
 581         rxe_drop_index(qp);
 582         rxe_drop_ref(qp);
 583 err1:
 584         return ERR_PTR(err);
 585 }
 586
 587 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 588                          int mask, struct ib_udata *udata)
 589 {
 590         int err;
 591         struct rxe_dev *rxe = to_rdev(ibqp->device);
 592         struct rxe_qp *qp = to_rqp(ibqp);
 593
 594         err = rxe_qp_chk_attr(rxe, qp, attr, mask);
 595         if (err)
 596                 goto err1;
 597
 598         err = rxe_qp_from_attr(qp, attr, mask, udata);
 599         if (err)
 600                 goto err1;
 601
 602         return 0;
 603
 604 err1:
 605         return err;
 606 }
 607
 608 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 609                         int mask, struct ib_qp_init_attr *init)
 610 {
 611         struct rxe_qp *qp = to_rqp(ibqp);
 612
 613         rxe_qp_to_init(qp, init);
 614         rxe_qp_to_attr(qp, attr, mask);
 615
 616         return 0;
 617 }
 618
 619 static int rxe_destroy_qp(struct ib_qp *ibqp)
 620 {
 621         struct rxe_qp *qp = to_rqp(ibqp);
 622
 623         rxe_qp_destroy(qp);
 624         rxe_drop_index(qp);
 625         rxe_drop_ref(qp);
 626         return 0;
 627 }
 628
 629 static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 630                             unsigned int mask, unsigned int length)
 631 {
 632         int num_sge = ibwr->num_sge;
 633         struct rxe_sq *sq = &qp->sq;
 634
 635         if (unlikely(num_sge > sq->max_sge))
 636                 goto err1;
 637
 638         if (unlikely(mask & WR_ATOMIC_MASK)) {
 639                 if (length < 8)
 640                         goto err1;
 641
 642                 if (atomic_wr(ibwr)->remote_addr & 0x7)
 643                         goto err1;
 644         }
 645
 646         if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
 647                      (length > sq->max_inline)))
 648                 goto err1;
 649
 650         return 0;
 651
 652 err1:
 653         return -EINVAL;
 654 }
 655
 656 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
 657                          struct ib_send_wr *ibwr)
 658 {
 659         wr->wr_id = ibwr->wr_id;
 660         wr->num_sge = ibwr->num_sge;
 661         wr->opcode = ibwr->opcode;
 662         wr->send_flags = ibwr->send_flags;
 663
 664         if (qp_type(qp) == IB_QPT_UD ||
 665             qp_type(qp) == IB_QPT_SMI ||
 666             qp_type(qp) == IB_QPT_GSI) {
 667                 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
 668                 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
 669                 if (qp_type(qp) == IB_QPT_GSI)
 670                         wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
 671                 if (wr->opcode == IB_WR_SEND_WITH_IMM)
 672                         wr->ex.imm_data = ibwr->ex.imm_data;
 673         } else {
 674                 switch (wr->opcode) {
 675                 case IB_WR_RDMA_WRITE_WITH_IMM:
 676                         wr->ex.imm_data = ibwr->ex.imm_data;
 677                 case IB_WR_RDMA_READ:
 678                 case IB_WR_RDMA_WRITE:
 679                         wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
 680                         wr->wr.rdma.rkey        = rdma_wr(ibwr)->rkey;
 681                         break;
 682                 case IB_WR_SEND_WITH_IMM:
 683                         wr->ex.imm_data = ibwr->ex.imm_data;
 684                         break;
 685                 case IB_WR_SEND_WITH_INV:
 686                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 687                         break;
 688                 case IB_WR_ATOMIC_CMP_AND_SWP:
 689                 case IB_WR_ATOMIC_FETCH_AND_ADD:
 690                         wr->wr.atomic.remote_addr =
 691                                 atomic_wr(ibwr)->remote_addr;
 692                         wr->wr.atomic.compare_add =
 693                                 atomic_wr(ibwr)->compare_add;
 694                         wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
 695                         wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
 696                         break;
 697                 case IB_WR_LOCAL_INV:
 698                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 699                 break;
 700                 case IB_WR_REG_MR:
 701                         wr->wr.reg.mr = reg_wr(ibwr)->mr;
 702                         wr->wr.reg.key = reg_wr(ibwr)->key;
 703                         wr->wr.reg.access = reg_wr(ibwr)->access;
 704                 break;
 705                 default:
 706                         break;
 707                 }
 708         }
 709 }
 710
 711 static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 712                          unsigned int mask, unsigned int length,
 713                          struct rxe_send_wqe *wqe)
 714 {
 715         int num_sge = ibwr->num_sge;
 716         struct ib_sge *sge;
 717         int i;
 718         u8 *p;
 719
 720         init_send_wr(qp, &wqe->wr, ibwr);
 721
 722         if (qp_type(qp) == IB_QPT_UD ||
 723             qp_type(qp) == IB_QPT_SMI ||
 724             qp_type(qp) == IB_QPT_GSI)
 725                 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
 726
 727         if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
 728                 p = wqe->dma.inline_data;
 729
 730                 sge = ibwr->sg_list;
 731                 for (i = 0; i < num_sge; i++, sge++) {
 732                         if (qp->is_user && copy_from_user(p, (__user void *)
 733                                             (uintptr_t)sge->addr, sge->length))
 734                                 return -EFAULT;
 735
 736                         else if (!qp->is_user)
 737                                 memcpy(p, (void *)(uintptr_t)sge->addr,
 738                                        sge->length);
 739
 740                         p += sge->length;
 741                 }
 742         } else if (mask & WR_REG_MASK) {
 743                 wqe->mask = mask;
 744                 wqe->state = wqe_state_posted;
 745                 return 0;
 746         } else
 747                 memcpy(wqe->dma.sge, ibwr->sg_list,
 748                        num_sge * sizeof(struct ib_sge));
 749
 750         wqe->iova               = (mask & WR_ATOMIC_MASK) ?
 751                                         atomic_wr(ibwr)->remote_addr :
 752                                         rdma_wr(ibwr)->remote_addr;
 753         wqe->mask               = mask;
 754         wqe->dma.length         = length;
 755         wqe->dma.resid          = length;
 756         wqe->dma.num_sge        = num_sge;
 757         wqe->dma.cur_sge        = 0;
 758         wqe->dma.sge_offset     = 0;
 759         wqe->state              = wqe_state_posted;
 760         wqe->ssn                = atomic_add_return(1, &qp->ssn);
 761
 762         return 0;
 763 }
 764
 765 static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 766                          unsigned int mask, u32 length)
 767 {
 768         int err;
 769         struct rxe_sq *sq = &qp->sq;
 770         struct rxe_send_wqe *send_wqe;
 771         unsigned long flags;
 772
 773         err = validate_send_wr(qp, ibwr, mask, length);
 774         if (err)
 775                 return err;
 776
 777         spin_lock_irqsave(&qp->sq.sq_lock, flags);
 778
 779         if (unlikely(queue_full(sq->queue))) {
 780                 err = -ENOMEM;
 781                 goto err1;
 782         }
 783
 784         send_wqe = producer_addr(sq->queue);
 785
 786         err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
 787         if (unlikely(err))
 788                 goto err1;
 789
 790         /*
 791          * make sure all changes to the work queue are
 792          * written before we update the producer pointer
 793          */
 794         smp_wmb();
 795
 796         advance_producer(sq->queue);
 797         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 798
 799         return 0;
 800
 801 err1:
 802         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 803         return err;
 804 }
 805
 806 static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
 807                                 struct ib_send_wr **bad_wr)
 808 {
 809         int err = 0;
 810         unsigned int mask;
 811         unsigned int length = 0;
 812         int i;
 813         int must_sched;
 814
 815         while (wr) {
 816                 mask = wr_opcode_mask(wr->opcode, qp);
 817                 if (unlikely(!mask)) {
 818                         err = -EINVAL;
 819                         *bad_wr = wr;
 820                         break;
 821                 }
 822
 823                 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
 824                              !(mask & WR_INLINE_MASK))) {
 825                         err = -EINVAL;
 826                         *bad_wr = wr;
 827                         break;
 828                 }
 829
 830                 length = 0;
 831                 for (i = 0; i < wr->num_sge; i++)
 832                         length += wr->sg_list[i].length;
 833
 834                 err = post_one_send(qp, wr, mask, length);
 835
 836                 if (err) {
 837                         *bad_wr = wr;
 838                         break;
 839                 }
 840                 wr = wr->next;
 841         }
 842
 843         /*
 844          * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
 845          * and the requester call ip_local_out_sk() that takes spin_lock_bh.
 846          */
 847         must_sched = (qp_type(qp) == IB_QPT_GSI) ||
 848                         (queue_count(qp->sq.queue) > 1);
 849
 850         rxe_run_task(&qp->req.task, must_sched);
 851
 852         return err;
 853 }
 854
 855 static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 856                          struct ib_send_wr **bad_wr)
 857 {
 858         struct rxe_qp *qp = to_rqp(ibqp);
 859
 860         if (unlikely(!qp->valid)) {
 861                 *bad_wr = wr;
 862                 return -EINVAL;
 863         }
 864
 865         if (unlikely(qp->req.state < QP_STATE_READY)) {
 866                 *bad_wr = wr;
 867                 return -EINVAL;
 868         }
 869
 870         if (qp->is_user) {
 871                 /* Utilize process context to do protocol processing */
 872                 rxe_run_task(&qp->req.task, 0);
 873                 return 0;
 874         } else
 875                 return rxe_post_send_kernel(qp, wr, bad_wr);
 876 }
 877
 878 static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 879                          struct ib_recv_wr **bad_wr)
 880 {
 881         int err = 0;
 882         struct rxe_qp *qp = to_rqp(ibqp);
 883         struct rxe_rq *rq = &qp->rq;
 884         unsigned long flags;
 885
 886         if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
 887                 *bad_wr = wr;
 888                 err = -EINVAL;
 889                 goto err1;
 890         }
 891
 892         if (unlikely(qp->srq)) {
 893                 *bad_wr = wr;
 894                 err = -EINVAL;
 895                 goto err1;
 896         }
 897
 898         spin_lock_irqsave(&rq->producer_lock, flags);
 899
 900         while (wr) {
 901                 err = post_one_recv(rq, wr);
 902                 if (unlikely(err)) {
 903                         *bad_wr = wr;
 904                         break;
 905                 }
 906                 wr = wr->next;
 907         }
 908
 909         spin_unlock_irqrestore(&rq->producer_lock, flags);
 910
 911 err1:
 912         return err;
 913 }
 914
 915 static struct ib_cq *rxe_create_cq(struct ib_device *dev,
 916                                    const struct ib_cq_init_attr *attr,
 917                                    struct ib_ucontext *context,
 918                                    struct ib_udata *udata)
 919 {
 920         int err;
 921         struct rxe_dev *rxe = to_rdev(dev);
 922         struct rxe_cq *cq;
 923
 924         if (attr->flags)
 925                 return ERR_PTR(-EINVAL);
 926
 927         err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
 928         if (err)
 929                 goto err1;
 930
 931         cq = rxe_alloc(&rxe->cq_pool);
 932         if (!cq) {
 933                 err = -ENOMEM;
 934                 goto err1;
 935         }
 936
 937         err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
 938                                context, udata);
 939         if (err)
 940                 goto err2;
 941
 942         return &cq->ibcq;
 943
 944 err2:
 945         rxe_drop_ref(cq);
 946 err1:
 947         return ERR_PTR(err);
 948 }
 949
 950 static int rxe_destroy_cq(struct ib_cq *ibcq)
 951 {
 952         struct rxe_cq *cq = to_rcq(ibcq);
 953
 954         rxe_drop_ref(cq);
 955         return 0;
 956 }
 957
 958 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
 959 {
 960         int err;
 961         struct rxe_cq *cq = to_rcq(ibcq);
 962         struct rxe_dev *rxe = to_rdev(ibcq->device);
 963
 964         err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
 965         if (err)
 966                 goto err1;
 967
 968         err = rxe_cq_resize_queue(cq, cqe, udata);
 969         if (err)
 970                 goto err1;
 971
 972         return 0;
 973
 974 err1:
 975         return err;
 976 }
 977
 978 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 979 {
 980         int i;
 981         struct rxe_cq *cq = to_rcq(ibcq);
 982         struct rxe_cqe *cqe;
 983         unsigned long flags;
 984
 985         spin_lock_irqsave(&cq->cq_lock, flags);
 986         for (i = 0; i < num_entries; i++) {
 987                 cqe = queue_head(cq->queue);
 988                 if (!cqe)
 989                         break;
 990
 991                 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
 992                 advance_consumer(cq->queue);
 993         }
 994         spin_unlock_irqrestore(&cq->cq_lock, flags);
 995
 996         return i;
 997 }
 998
 999 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
1000 {
1001         struct rxe_cq *cq = to_rcq(ibcq);
1002         int count = queue_count(cq->queue);
1003
1004         return (count > wc_cnt) ? wc_cnt : count;
1005 }
1006
1007 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
1008 {
1009         struct rxe_cq *cq = to_rcq(ibcq);
1010
1011         if (cq->notify != IB_CQ_NEXT_COMP)
1012                 cq->notify = flags & IB_CQ_SOLICITED_MASK;
1013
1014         return 0;
1015 }
1016
1017 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1018 {
1019         struct rxe_dev *rxe = to_rdev(ibpd->device);
1020         struct rxe_pd *pd = to_rpd(ibpd);
1021         struct rxe_mem *mr;
1022         int err;
1023
1024         mr = rxe_alloc(&rxe->mr_pool);
1025         if (!mr) {
1026                 err = -ENOMEM;
1027                 goto err1;
1028         }
1029
1030         rxe_add_index(mr);
1031
1032         rxe_add_ref(pd);
1033
1034         err = rxe_mem_init_dma(rxe, pd, access, mr);
1035         if (err)
1036                 goto err2;
1037
1038         return &mr->ibmr;
1039
1040 err2:
1041         rxe_drop_ref(pd);
1042         rxe_drop_index(mr);
1043         rxe_drop_ref(mr);
1044 err1:
1045         return ERR_PTR(err);
1046 }
1047
1048 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1049                                      u64 start,
1050                                      u64 length,
1051                                      u64 iova,
1052                                      int access, struct ib_udata *udata)
1053 {
1054         int err;
1055         struct rxe_dev *rxe = to_rdev(ibpd->device);
1056         struct rxe_pd *pd = to_rpd(ibpd);
1057         struct rxe_mem *mr;
1058
1059         mr = rxe_alloc(&rxe->mr_pool);
1060         if (!mr) {
1061                 err = -ENOMEM;
1062                 goto err2;
1063         }
1064
1065         rxe_add_index(mr);
1066
1067         rxe_add_ref(pd);
1068
1069         err = rxe_mem_init_user(rxe, pd, start, length, iova,
1070                                 access, udata, mr);
1071         if (err)
1072                 goto err3;
1073
1074         return &mr->ibmr;
1075
1076 err3:
1077         rxe_drop_ref(pd);
1078         rxe_drop_index(mr);
1079         rxe_drop_ref(mr);
1080 err2:
1081         return ERR_PTR(err);
1082 }
1083
1084 static int rxe_dereg_mr(struct ib_mr *ibmr)
1085 {
1086         struct rxe_mem *mr = to_rmr(ibmr);
1087
1088         mr->state = RXE_MEM_STATE_ZOMBIE;
1089         rxe_drop_ref(mr->pd);
1090         rxe_drop_index(mr);
1091         rxe_drop_ref(mr);
1092         return 0;
1093 }
1094
1095 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1096                                   enum ib_mr_type mr_type,
1097                                   u32 max_num_sg)
1098 {
1099         struct rxe_dev *rxe = to_rdev(ibpd->device);
1100         struct rxe_pd *pd = to_rpd(ibpd);
1101         struct rxe_mem *mr;
1102         int err;
1103
1104         if (mr_type != IB_MR_TYPE_MEM_REG)
1105                 return ERR_PTR(-EINVAL);
1106
1107         mr = rxe_alloc(&rxe->mr_pool);
1108         if (!mr) {
1109                 err = -ENOMEM;
1110                 goto err1;
1111         }
1112
1113         rxe_add_index(mr);
1114
1115         rxe_add_ref(pd);
1116
1117         err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1118         if (err)
1119                 goto err2;
1120
1121         return &mr->ibmr;
1122
1123 err2:
1124         rxe_drop_ref(pd);
1125         rxe_drop_index(mr);
1126         rxe_drop_ref(mr);
1127 err1:
1128         return ERR_PTR(err);
1129 }
1130
1131 static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1132 {
1133         struct rxe_mem *mr = to_rmr(ibmr);
1134         struct rxe_map *map;
1135         struct rxe_phys_buf *buf;
1136
1137         if (unlikely(mr->nbuf == mr->num_buf))
1138                 return -ENOMEM;
1139
1140         map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1141         buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1142
1143         buf->addr = addr;
1144         buf->size = ibmr->page_size;
1145         mr->nbuf++;
1146
1147         return 0;
1148 }
1149
1150 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1151                          int sg_nents, unsigned int *sg_offset)
1152 {
1153         struct rxe_mem *mr = to_rmr(ibmr);
1154         int n;
1155
1156         mr->nbuf = 0;
1157
1158         n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1159
1160         mr->va = ibmr->iova;
1161         mr->iova = ibmr->iova;
1162         mr->length = ibmr->length;
1163         mr->page_shift = ilog2(ibmr->page_size);
1164         mr->page_mask = ibmr->page_size - 1;
1165         mr->offset = mr->iova & mr->page_mask;
1166
1167         return n;
1168 }
1169
1170 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1171 {
1172         int err;
1173         struct rxe_dev *rxe = to_rdev(ibqp->device);
1174         struct rxe_qp *qp = to_rqp(ibqp);
1175         struct rxe_mc_grp *grp;
1176
1177         /* takes a ref on grp if successful */
1178         err = rxe_mcast_get_grp(rxe, mgid, &grp);
1179         if (err)
1180                 return err;
1181
1182         err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1183
1184         rxe_drop_ref(grp);
1185         return err;
1186 }
1187
1188 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1189 {
1190         struct rxe_dev *rxe = to_rdev(ibqp->device);
1191         struct rxe_qp *qp = to_rqp(ibqp);
1192
1193         return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1194 }
1195
1196 static ssize_t rxe_show_parent(struct device *device,
1197                                struct device_attribute *attr, char *buf)
1198 {
1199         struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1200                                            ib_dev.dev);
1201         char *name;
1202
1203         name = rxe->ifc_ops->parent_name(rxe, 1);
1204         return snprintf(buf, 16, "%s\n", name);
1205 }
1206
1207 static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1208
1209 static struct device_attribute *rxe_dev_attributes[] = {
1210         &dev_attr_parent,
1211 };
1212
1213 int rxe_register_device(struct rxe_dev *rxe)
1214 {
1215         int err;
1216         int i;
1217         struct ib_device *dev = &rxe->ib_dev;
1218
1219         strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1220         strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1221
1222         dev->owner = THIS_MODULE;
1223         dev->node_type = RDMA_NODE_IB_CA;
1224         dev->phys_port_cnt = 1;
1225         dev->num_comp_vectors = RXE_NUM_COMP_VECTORS;
1226         dev->dma_device = rxe->ifc_ops->dma_device(rxe);
1227         dev->local_dma_lkey = 0;
1228         dev->node_guid = rxe->ifc_ops->node_guid(rxe);
1229         dev->dma_ops = &rxe_dma_mapping_ops;
1230
1231         dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1232         dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1233             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1234             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1235             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1236             | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1237             | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1238             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1239             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1240             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1241             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1242             | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1243             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1244             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1245             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1246             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1247             | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1248             | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1249             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1250             | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1251             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1252             | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1253             | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1254             | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1255             | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1256             | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1257             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1258             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1259             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1260             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1261             | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1262             | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1263             ;
1264
1265         dev->query_device = rxe_query_device;
1266         dev->modify_device = rxe_modify_device;
1267         dev->query_port = rxe_query_port;
1268         dev->modify_port = rxe_modify_port;
1269         dev->get_link_layer = rxe_get_link_layer;
1270         dev->query_gid = rxe_query_gid;
1271         dev->get_netdev = rxe_get_netdev;
1272         dev->add_gid = rxe_add_gid;
1273         dev->del_gid = rxe_del_gid;
1274         dev->query_pkey = rxe_query_pkey;
1275         dev->alloc_ucontext = rxe_alloc_ucontext;
1276         dev->dealloc_ucontext = rxe_dealloc_ucontext;
1277         dev->mmap = rxe_mmap;
1278         dev->get_port_immutable = rxe_port_immutable;
1279         dev->alloc_pd = rxe_alloc_pd;
1280         dev->dealloc_pd = rxe_dealloc_pd;
1281         dev->create_ah = rxe_create_ah;
1282         dev->modify_ah = rxe_modify_ah;
1283         dev->query_ah = rxe_query_ah;
1284         dev->destroy_ah = rxe_destroy_ah;
1285         dev->create_srq = rxe_create_srq;
1286         dev->modify_srq = rxe_modify_srq;
1287         dev->query_srq = rxe_query_srq;
1288         dev->destroy_srq = rxe_destroy_srq;
1289         dev->post_srq_recv = rxe_post_srq_recv;
1290         dev->create_qp = rxe_create_qp;
1291         dev->modify_qp = rxe_modify_qp;
1292         dev->query_qp = rxe_query_qp;
1293         dev->destroy_qp = rxe_destroy_qp;
1294         dev->post_send = rxe_post_send;
1295         dev->post_recv = rxe_post_recv;
1296         dev->create_cq = rxe_create_cq;
1297         dev->destroy_cq = rxe_destroy_cq;
1298         dev->resize_cq = rxe_resize_cq;
1299         dev->poll_cq = rxe_poll_cq;
1300         dev->peek_cq = rxe_peek_cq;
1301         dev->req_notify_cq = rxe_req_notify_cq;
1302         dev->get_dma_mr = rxe_get_dma_mr;
1303         dev->reg_user_mr = rxe_reg_user_mr;
1304         dev->dereg_mr = rxe_dereg_mr;
1305         dev->alloc_mr = rxe_alloc_mr;
1306         dev->map_mr_sg = rxe_map_mr_sg;
1307         dev->attach_mcast = rxe_attach_mcast;
1308         dev->detach_mcast = rxe_detach_mcast;
1309
1310         err = ib_register_device(dev, NULL);
1311         if (err) {
1312                 pr_warn("rxe_register_device failed, err = %d\n", err);
1313                 goto err1;
1314         }
1315
1316         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1317                 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1318                 if (err) {
1319                         pr_warn("device_create_file failed, i = %d, err = %d\n",
1320                                 i, err);
1321                         goto err2;
1322                 }
1323         }
1324
1325         return 0;
1326
1327 err2:
1328         ib_unregister_device(dev);
1329 err1:
1330         return err;
1331 }
1332
1333 int rxe_unregister_device(struct rxe_dev *rxe)
1334 {
1335         int i;
1336         struct ib_device *dev = &rxe->ib_dev;
1337
1338         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1339                 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1340
1341         ib_unregister_device(dev);
1342
1343         return 0;
1344 }