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 <linux/dma-mapping.h>
  35 #include <net/addrconf.h>
  36 #include "rxe.h"
  37 #include "rxe_loc.h"
  38 #include "rxe_queue.h"
  39 #include "rxe_hw_counters.h"
  40
  41 static int rxe_query_device(struct ib_device *dev,
  42                             struct ib_device_attr *attr,
  43                             struct ib_udata *uhw)
  44 {
  45         struct rxe_dev *rxe = to_rdev(dev);
  46
  47         if (uhw->inlen || uhw->outlen)
  48                 return -EINVAL;
  49
  50         *attr = rxe->attr;
  51         return 0;
  52 }
  53
  54 static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
  55                                       u8 *active_width)
  56 {
  57         if (speed <= 1000) {
  58                 *active_width = IB_WIDTH_1X;
  59                 *active_speed = IB_SPEED_SDR;
  60         } else if (speed <= 10000) {
  61                 *active_width = IB_WIDTH_1X;
  62                 *active_speed = IB_SPEED_FDR10;
  63         } else if (speed <= 20000) {
  64                 *active_width = IB_WIDTH_4X;
  65                 *active_speed = IB_SPEED_DDR;
  66         } else if (speed <= 30000) {
  67                 *active_width = IB_WIDTH_4X;
  68                 *active_speed = IB_SPEED_QDR;
  69         } else if (speed <= 40000) {
  70                 *active_width = IB_WIDTH_4X;
  71                 *active_speed = IB_SPEED_FDR10;
  72         } else {
  73                 *active_width = IB_WIDTH_4X;
  74                 *active_speed = IB_SPEED_EDR;
  75         }
  76 }
  77
  78 static int rxe_query_port(struct ib_device *dev,
  79                           u8 port_num, struct ib_port_attr *attr)
  80 {
  81         struct rxe_dev *rxe = to_rdev(dev);
  82         struct rxe_port *port;
  83         u32 speed;
  84
  85         if (unlikely(port_num != 1)) {
  86                 pr_warn("invalid port_number %d\n", port_num);
  87                 goto err1;
  88         }
  89
  90         port = &rxe->port;
  91
  92         /* *attr being zeroed by the caller, avoid zeroing it here */
  93         *attr = port->attr;
  94
  95         mutex_lock(&rxe->usdev_lock);
  96         if (rxe->ndev->ethtool_ops->get_link_ksettings) {
  97                 struct ethtool_link_ksettings ks;
  98
  99                 rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks);
 100                 speed = ks.base.speed;
 101         } else if (rxe->ndev->ethtool_ops->get_settings) {
 102                 struct ethtool_cmd cmd;
 103
 104                 rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
 105                 speed = cmd.speed;
 106         } else {
 107                 pr_warn("%s speed is unknown, defaulting to 1000\n",
 108                         rxe->ndev->name);
 109                 speed = 1000;
 110         }
 111         rxe_eth_speed_to_ib_speed(speed, &attr->active_speed,
 112                                   &attr->active_width);
 113         mutex_unlock(&rxe->usdev_lock);
 114
 115         return 0;
 116
 117 err1:
 118         return -EINVAL;
 119 }
 120
 121 static int rxe_query_gid(struct ib_device *device,
 122                          u8 port_num, int index, union ib_gid *gid)
 123 {
 124         int ret;
 125
 126         if (index > RXE_PORT_GID_TBL_LEN)
 127                 return -EINVAL;
 128
 129         ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
 130         if (ret == -EAGAIN) {
 131                 memcpy(gid, &zgid, sizeof(*gid));
 132                 return 0;
 133         }
 134
 135         return ret;
 136 }
 137
 138 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
 139                        index, const union ib_gid *gid,
 140                        const struct ib_gid_attr *attr, void **context)
 141 {
 142         if (index >= RXE_PORT_GID_TBL_LEN)
 143                 return -EINVAL;
 144         return 0;
 145 }
 146
 147 static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
 148                        index, void **context)
 149 {
 150         if (index >= RXE_PORT_GID_TBL_LEN)
 151                 return -EINVAL;
 152         return 0;
 153 }
 154
 155 static struct net_device *rxe_get_netdev(struct ib_device *device,
 156                                          u8 port_num)
 157 {
 158         struct rxe_dev *rxe = to_rdev(device);
 159
 160         if (rxe->ndev) {
 161                 dev_hold(rxe->ndev);
 162                 return rxe->ndev;
 163         }
 164
 165         return NULL;
 166 }
 167
 168 static int rxe_query_pkey(struct ib_device *device,
 169                           u8 port_num, u16 index, u16 *pkey)
 170 {
 171         struct rxe_dev *rxe = to_rdev(device);
 172         struct rxe_port *port;
 173
 174         if (unlikely(port_num != 1)) {
 175                 dev_warn(device->dev.parent, "invalid port_num = %d\n",
 176                          port_num);
 177                 goto err1;
 178         }
 179
 180         port = &rxe->port;
 181
 182         if (unlikely(index >= port->attr.pkey_tbl_len)) {
 183                 dev_warn(device->dev.parent, "invalid index = %d\n",
 184                          index);
 185                 goto err1;
 186         }
 187
 188         *pkey = port->pkey_tbl[index];
 189         return 0;
 190
 191 err1:
 192         return -EINVAL;
 193 }
 194
 195 static int rxe_modify_device(struct ib_device *dev,
 196                              int mask, struct ib_device_modify *attr)
 197 {
 198         struct rxe_dev *rxe = to_rdev(dev);
 199
 200         if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 201                 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
 202
 203         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 204                 memcpy(rxe->ib_dev.node_desc,
 205                        attr->node_desc, sizeof(rxe->ib_dev.node_desc));
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int rxe_modify_port(struct ib_device *dev,
 212                            u8 port_num, int mask, struct ib_port_modify *attr)
 213 {
 214         struct rxe_dev *rxe = to_rdev(dev);
 215         struct rxe_port *port;
 216
 217         if (unlikely(port_num != 1)) {
 218                 pr_warn("invalid port_num = %d\n", port_num);
 219                 goto err1;
 220         }
 221
 222         port = &rxe->port;
 223
 224         port->attr.port_cap_flags |= attr->set_port_cap_mask;
 225         port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
 226
 227         if (mask & IB_PORT_RESET_QKEY_CNTR)
 228                 port->attr.qkey_viol_cntr = 0;
 229
 230         return 0;
 231
 232 err1:
 233         return -EINVAL;
 234 }
 235
 236 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
 237                                                u8 port_num)
 238 {
 239         struct rxe_dev *rxe = to_rdev(dev);
 240
 241         return rxe_link_layer(rxe, port_num);
 242 }
 243
 244 static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
 245                                               struct ib_udata *udata)
 246 {
 247         struct rxe_dev *rxe = to_rdev(dev);
 248         struct rxe_ucontext *uc;
 249
 250         uc = rxe_alloc(&rxe->uc_pool);
 251         return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
 252 }
 253
 254 static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
 255 {
 256         struct rxe_ucontext *uc = to_ruc(ibuc);
 257
 258         rxe_drop_ref(uc);
 259         return 0;
 260 }
 261
 262 static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
 263                               struct ib_port_immutable *immutable)
 264 {
 265         int err;
 266         struct ib_port_attr attr;
 267
 268         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 269
 270         err = ib_query_port(dev, port_num, &attr);
 271         if (err)
 272                 return err;
 273
 274         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 275         immutable->gid_tbl_len = attr.gid_tbl_len;
 276         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 277
 278         return 0;
 279 }
 280
 281 static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
 282                                   struct ib_ucontext *context,
 283                                   struct ib_udata *udata)
 284 {
 285         struct rxe_dev *rxe = to_rdev(dev);
 286         struct rxe_pd *pd;
 287
 288         pd = rxe_alloc(&rxe->pd_pool);
 289         return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
 290 }
 291
 292 static int rxe_dealloc_pd(struct ib_pd *ibpd)
 293 {
 294         struct rxe_pd *pd = to_rpd(ibpd);
 295
 296         rxe_drop_ref(pd);
 297         return 0;
 298 }
 299
 300 static int rxe_init_av(struct rxe_dev *rxe, struct rdma_ah_attr *attr,
 301                        struct rxe_av *av)
 302 {
 303         int err;
 304         union ib_gid sgid;
 305         struct ib_gid_attr sgid_attr;
 306
 307         err = ib_get_cached_gid(&rxe->ib_dev, rdma_ah_get_port_num(attr),
 308                                 rdma_ah_read_grh(attr)->sgid_index, &sgid,
 309                                 &sgid_attr);
 310         if (err) {
 311                 pr_err("Failed to query sgid. err = %d\n", err);
 312                 return err;
 313         }
 314
 315         err = rxe_av_from_attr(rxe, rdma_ah_get_port_num(attr), av, attr);
 316         if (!err)
 317                 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
 318
 319         if (sgid_attr.ndev)
 320                 dev_put(sgid_attr.ndev);
 321         return err;
 322 }
 323
 324 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd,
 325                                    struct rdma_ah_attr *attr,
 326                                    struct ib_udata *udata)
 327
 328 {
 329         int err;
 330         struct rxe_dev *rxe = to_rdev(ibpd->device);
 331         struct rxe_pd *pd = to_rpd(ibpd);
 332         struct rxe_ah *ah;
 333
 334         err = rxe_av_chk_attr(rxe, attr);
 335         if (err)
 336                 goto err1;
 337
 338         ah = rxe_alloc(&rxe->ah_pool);
 339         if (!ah) {
 340                 err = -ENOMEM;
 341                 goto err1;
 342         }
 343
 344         rxe_add_ref(pd);
 345         ah->pd = pd;
 346
 347         err = rxe_init_av(rxe, attr, &ah->av);
 348         if (err)
 349                 goto err2;
 350
 351         return &ah->ibah;
 352
 353 err2:
 354         rxe_drop_ref(pd);
 355         rxe_drop_ref(ah);
 356 err1:
 357         return ERR_PTR(err);
 358 }
 359
 360 static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
 361 {
 362         int err;
 363         struct rxe_dev *rxe = to_rdev(ibah->device);
 364         struct rxe_ah *ah = to_rah(ibah);
 365
 366         err = rxe_av_chk_attr(rxe, attr);
 367         if (err)
 368                 return err;
 369
 370         err = rxe_init_av(rxe, attr, &ah->av);
 371         if (err)
 372                 return err;
 373
 374         return 0;
 375 }
 376
 377 static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
 378 {
 379         struct rxe_dev *rxe = to_rdev(ibah->device);
 380         struct rxe_ah *ah = to_rah(ibah);
 381
 382         memset(attr, 0, sizeof(*attr));
 383         attr->type = ibah->type;
 384         rxe_av_to_attr(rxe, &ah->av, attr);
 385         return 0;
 386 }
 387
 388 static int rxe_destroy_ah(struct ib_ah *ibah)
 389 {
 390         struct rxe_ah *ah = to_rah(ibah);
 391
 392         rxe_drop_ref(ah->pd);
 393         rxe_drop_ref(ah);
 394         return 0;
 395 }
 396
 397 static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
 398 {
 399         int err;
 400         int i;
 401         u32 length;
 402         struct rxe_recv_wqe *recv_wqe;
 403         int num_sge = ibwr->num_sge;
 404
 405         if (unlikely(queue_full(rq->queue))) {
 406                 err = -ENOMEM;
 407                 goto err1;
 408         }
 409
 410         if (unlikely(num_sge > rq->max_sge)) {
 411                 err = -EINVAL;
 412                 goto err1;
 413         }
 414
 415         length = 0;
 416         for (i = 0; i < num_sge; i++)
 417                 length += ibwr->sg_list[i].length;
 418
 419         recv_wqe = producer_addr(rq->queue);
 420         recv_wqe->wr_id = ibwr->wr_id;
 421         recv_wqe->num_sge = num_sge;
 422
 423         memcpy(recv_wqe->dma.sge, ibwr->sg_list,
 424                num_sge * sizeof(struct ib_sge));
 425
 426         recv_wqe->dma.length            = length;
 427         recv_wqe->dma.resid             = length;
 428         recv_wqe->dma.num_sge           = num_sge;
 429         recv_wqe->dma.cur_sge           = 0;
 430         recv_wqe->dma.sge_offset        = 0;
 431
 432         /* make sure all changes to the work queue are written before we
 433          * update the producer pointer
 434          */
 435         smp_wmb();
 436
 437         advance_producer(rq->queue);
 438         return 0;
 439
 440 err1:
 441         return err;
 442 }
 443
 444 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
 445                                      struct ib_srq_init_attr *init,
 446                                      struct ib_udata *udata)
 447 {
 448         int err;
 449         struct rxe_dev *rxe = to_rdev(ibpd->device);
 450         struct rxe_pd *pd = to_rpd(ibpd);
 451         struct rxe_srq *srq;
 452         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 453
 454         err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
 455         if (err)
 456                 goto err1;
 457
 458         srq = rxe_alloc(&rxe->srq_pool);
 459         if (!srq) {
 460                 err = -ENOMEM;
 461                 goto err1;
 462         }
 463
 464         rxe_add_index(srq);
 465         rxe_add_ref(pd);
 466         srq->pd = pd;
 467
 468         err = rxe_srq_from_init(rxe, srq, init, context, udata);
 469         if (err)
 470                 goto err2;
 471
 472         return &srq->ibsrq;
 473
 474 err2:
 475         rxe_drop_ref(pd);
 476         rxe_drop_index(srq);
 477         rxe_drop_ref(srq);
 478 err1:
 479         return ERR_PTR(err);
 480 }
 481
 482 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 483                           enum ib_srq_attr_mask mask,
 484                           struct ib_udata *udata)
 485 {
 486         int err;
 487         struct rxe_srq *srq = to_rsrq(ibsrq);
 488         struct rxe_dev *rxe = to_rdev(ibsrq->device);
 489
 490         err = rxe_srq_chk_attr(rxe, srq, attr, mask);
 491         if (err)
 492                 goto err1;
 493
 494         err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
 495         if (err)
 496                 goto err1;
 497
 498         return 0;
 499
 500 err1:
 501         return err;
 502 }
 503
 504 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
 505 {
 506         struct rxe_srq *srq = to_rsrq(ibsrq);
 507
 508         if (srq->error)
 509                 return -EINVAL;
 510
 511         attr->max_wr = srq->rq.queue->buf->index_mask;
 512         attr->max_sge = srq->rq.max_sge;
 513         attr->srq_limit = srq->limit;
 514         return 0;
 515 }
 516
 517 static int rxe_destroy_srq(struct ib_srq *ibsrq)
 518 {
 519         struct rxe_srq *srq = to_rsrq(ibsrq);
 520
 521         if (srq->rq.queue)
 522                 rxe_queue_cleanup(srq->rq.queue);
 523
 524         rxe_drop_ref(srq->pd);
 525         rxe_drop_index(srq);
 526         rxe_drop_ref(srq);
 527
 528         return 0;
 529 }
 530
 531 static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 532                              struct ib_recv_wr **bad_wr)
 533 {
 534         int err = 0;
 535         unsigned long flags;
 536         struct rxe_srq *srq = to_rsrq(ibsrq);
 537
 538         spin_lock_irqsave(&srq->rq.producer_lock, flags);
 539
 540         while (wr) {
 541                 err = post_one_recv(&srq->rq, wr);
 542                 if (unlikely(err))
 543                         break;
 544                 wr = wr->next;
 545         }
 546
 547         spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
 548
 549         if (err)
 550                 *bad_wr = wr;
 551
 552         return err;
 553 }
 554
 555 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
 556                                    struct ib_qp_init_attr *init,
 557                                    struct ib_udata *udata)
 558 {
 559         int err;
 560         struct rxe_dev *rxe = to_rdev(ibpd->device);
 561         struct rxe_pd *pd = to_rpd(ibpd);
 562         struct rxe_qp *qp;
 563
 564         err = rxe_qp_chk_init(rxe, init);
 565         if (err)
 566                 goto err1;
 567
 568         qp = rxe_alloc(&rxe->qp_pool);
 569         if (!qp) {
 570                 err = -ENOMEM;
 571                 goto err1;
 572         }
 573
 574         if (udata) {
 575                 if (udata->inlen) {
 576                         err = -EINVAL;
 577                         goto err2;
 578                 }
 579                 qp->is_user = 1;
 580         }
 581
 582         rxe_add_index(qp);
 583
 584         err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
 585         if (err)
 586                 goto err3;
 587
 588         return &qp->ibqp;
 589
 590 err3:
 591         rxe_drop_index(qp);
 592 err2:
 593         rxe_drop_ref(qp);
 594 err1:
 595         return ERR_PTR(err);
 596 }
 597
 598 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 599                          int mask, struct ib_udata *udata)
 600 {
 601         int err;
 602         struct rxe_dev *rxe = to_rdev(ibqp->device);
 603         struct rxe_qp *qp = to_rqp(ibqp);
 604
 605         err = rxe_qp_chk_attr(rxe, qp, attr, mask);
 606         if (err)
 607                 goto err1;
 608
 609         err = rxe_qp_from_attr(qp, attr, mask, udata);
 610         if (err)
 611                 goto err1;
 612
 613         return 0;
 614
 615 err1:
 616         return err;
 617 }
 618
 619 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 620                         int mask, struct ib_qp_init_attr *init)
 621 {
 622         struct rxe_qp *qp = to_rqp(ibqp);
 623
 624         rxe_qp_to_init(qp, init);
 625         rxe_qp_to_attr(qp, attr, mask);
 626
 627         return 0;
 628 }
 629
 630 static int rxe_destroy_qp(struct ib_qp *ibqp)
 631 {
 632         struct rxe_qp *qp = to_rqp(ibqp);
 633
 634         rxe_qp_destroy(qp);
 635         rxe_drop_index(qp);
 636         rxe_drop_ref(qp);
 637         return 0;
 638 }
 639
 640 static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 641                             unsigned int mask, unsigned int length)
 642 {
 643         int num_sge = ibwr->num_sge;
 644         struct rxe_sq *sq = &qp->sq;
 645
 646         if (unlikely(num_sge > sq->max_sge))
 647                 goto err1;
 648
 649         if (unlikely(mask & WR_ATOMIC_MASK)) {
 650                 if (length < 8)
 651                         goto err1;
 652
 653                 if (atomic_wr(ibwr)->remote_addr & 0x7)
 654                         goto err1;
 655         }
 656
 657         if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
 658                      (length > sq->max_inline)))
 659                 goto err1;
 660
 661         return 0;
 662
 663 err1:
 664         return -EINVAL;
 665 }
 666
 667 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
 668                          struct ib_send_wr *ibwr)
 669 {
 670         wr->wr_id = ibwr->wr_id;
 671         wr->num_sge = ibwr->num_sge;
 672         wr->opcode = ibwr->opcode;
 673         wr->send_flags = ibwr->send_flags;
 674
 675         if (qp_type(qp) == IB_QPT_UD ||
 676             qp_type(qp) == IB_QPT_SMI ||
 677             qp_type(qp) == IB_QPT_GSI) {
 678                 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
 679                 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
 680                 if (qp_type(qp) == IB_QPT_GSI)
 681                         wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
 682                 if (wr->opcode == IB_WR_SEND_WITH_IMM)
 683                         wr->ex.imm_data = ibwr->ex.imm_data;
 684         } else {
 685                 switch (wr->opcode) {
 686                 case IB_WR_RDMA_WRITE_WITH_IMM:
 687                         wr->ex.imm_data = ibwr->ex.imm_data;
 688                 case IB_WR_RDMA_READ:
 689                 case IB_WR_RDMA_WRITE:
 690                         wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
 691                         wr->wr.rdma.rkey        = rdma_wr(ibwr)->rkey;
 692                         break;
 693                 case IB_WR_SEND_WITH_IMM:
 694                         wr->ex.imm_data = ibwr->ex.imm_data;
 695                         break;
 696                 case IB_WR_SEND_WITH_INV:
 697                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 698                         break;
 699                 case IB_WR_ATOMIC_CMP_AND_SWP:
 700                 case IB_WR_ATOMIC_FETCH_AND_ADD:
 701                         wr->wr.atomic.remote_addr =
 702                                 atomic_wr(ibwr)->remote_addr;
 703                         wr->wr.atomic.compare_add =
 704                                 atomic_wr(ibwr)->compare_add;
 705                         wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
 706                         wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
 707                         break;
 708                 case IB_WR_LOCAL_INV:
 709                         wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
 710                 break;
 711                 case IB_WR_REG_MR:
 712                         wr->wr.reg.mr = reg_wr(ibwr)->mr;
 713                         wr->wr.reg.key = reg_wr(ibwr)->key;
 714                         wr->wr.reg.access = reg_wr(ibwr)->access;
 715                 break;
 716                 default:
 717                         break;
 718                 }
 719         }
 720 }
 721
 722 static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 723                          unsigned int mask, unsigned int length,
 724                          struct rxe_send_wqe *wqe)
 725 {
 726         int num_sge = ibwr->num_sge;
 727         struct ib_sge *sge;
 728         int i;
 729         u8 *p;
 730
 731         init_send_wr(qp, &wqe->wr, ibwr);
 732
 733         if (qp_type(qp) == IB_QPT_UD ||
 734             qp_type(qp) == IB_QPT_SMI ||
 735             qp_type(qp) == IB_QPT_GSI)
 736                 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
 737
 738         if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
 739                 p = wqe->dma.inline_data;
 740
 741                 sge = ibwr->sg_list;
 742                 for (i = 0; i < num_sge; i++, sge++) {
 743                         memcpy(p, (void *)(uintptr_t)sge->addr,
 744                                         sge->length);
 745
 746                         p += sge->length;
 747                 }
 748         } else if (mask & WR_REG_MASK) {
 749                 wqe->mask = mask;
 750                 wqe->state = wqe_state_posted;
 751                 return 0;
 752         } else
 753                 memcpy(wqe->dma.sge, ibwr->sg_list,
 754                        num_sge * sizeof(struct ib_sge));
 755
 756         wqe->iova               = (mask & WR_ATOMIC_MASK) ?
 757                                         atomic_wr(ibwr)->remote_addr :
 758                                         rdma_wr(ibwr)->remote_addr;
 759         wqe->mask               = mask;
 760         wqe->dma.length         = length;
 761         wqe->dma.resid          = length;
 762         wqe->dma.num_sge        = num_sge;
 763         wqe->dma.cur_sge        = 0;
 764         wqe->dma.sge_offset     = 0;
 765         wqe->state              = wqe_state_posted;
 766         wqe->ssn                = atomic_add_return(1, &qp->ssn);
 767
 768         return 0;
 769 }
 770
 771 static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
 772                          unsigned int mask, u32 length)
 773 {
 774         int err;
 775         struct rxe_sq *sq = &qp->sq;
 776         struct rxe_send_wqe *send_wqe;
 777         unsigned long flags;
 778
 779         err = validate_send_wr(qp, ibwr, mask, length);
 780         if (err)
 781                 return err;
 782
 783         spin_lock_irqsave(&qp->sq.sq_lock, flags);
 784
 785         if (unlikely(queue_full(sq->queue))) {
 786                 err = -ENOMEM;
 787                 goto err1;
 788         }
 789
 790         send_wqe = producer_addr(sq->queue);
 791
 792         err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
 793         if (unlikely(err))
 794                 goto err1;
 795
 796         /*
 797          * make sure all changes to the work queue are
 798          * written before we update the producer pointer
 799          */
 800         smp_wmb();
 801
 802         advance_producer(sq->queue);
 803         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 804
 805         return 0;
 806
 807 err1:
 808         spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
 809         return err;
 810 }
 811
 812 static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
 813                                 struct ib_send_wr **bad_wr)
 814 {
 815         int err = 0;
 816         unsigned int mask;
 817         unsigned int length = 0;
 818         int i;
 819         int must_sched;
 820
 821         while (wr) {
 822                 mask = wr_opcode_mask(wr->opcode, qp);
 823                 if (unlikely(!mask)) {
 824                         err = -EINVAL;
 825                         *bad_wr = wr;
 826                         break;
 827                 }
 828
 829                 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
 830                              !(mask & WR_INLINE_MASK))) {
 831                         err = -EINVAL;
 832                         *bad_wr = wr;
 833                         break;
 834                 }
 835
 836                 length = 0;
 837                 for (i = 0; i < wr->num_sge; i++)
 838                         length += wr->sg_list[i].length;
 839
 840                 err = post_one_send(qp, wr, mask, length);
 841
 842                 if (err) {
 843                         *bad_wr = wr;
 844                         break;
 845                 }
 846                 wr = wr->next;
 847         }
 848
 849         /*
 850          * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
 851          * and the requester call ip_local_out_sk() that takes spin_lock_bh.
 852          */
 853         must_sched = (qp_type(qp) == IB_QPT_GSI) ||
 854                         (queue_count(qp->sq.queue) > 1);
 855
 856         rxe_run_task(&qp->req.task, must_sched);
 857
 858         return err;
 859 }
 860
 861 static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 862                          struct ib_send_wr **bad_wr)
 863 {
 864         struct rxe_qp *qp = to_rqp(ibqp);
 865
 866         if (unlikely(!qp->valid)) {
 867                 *bad_wr = wr;
 868                 return -EINVAL;
 869         }
 870
 871         if (unlikely(qp->req.state < QP_STATE_READY)) {
 872                 *bad_wr = wr;
 873                 return -EINVAL;
 874         }
 875
 876         if (qp->is_user) {
 877                 /* Utilize process context to do protocol processing */
 878                 rxe_run_task(&qp->req.task, 0);
 879                 return 0;
 880         } else
 881                 return rxe_post_send_kernel(qp, wr, bad_wr);
 882 }
 883
 884 static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 885                          struct ib_recv_wr **bad_wr)
 886 {
 887         int err = 0;
 888         struct rxe_qp *qp = to_rqp(ibqp);
 889         struct rxe_rq *rq = &qp->rq;
 890         unsigned long flags;
 891
 892         if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
 893                 *bad_wr = wr;
 894                 err = -EINVAL;
 895                 goto err1;
 896         }
 897
 898         if (unlikely(qp->srq)) {
 899                 *bad_wr = wr;
 900                 err = -EINVAL;
 901                 goto err1;
 902         }
 903
 904         spin_lock_irqsave(&rq->producer_lock, flags);
 905
 906         while (wr) {
 907                 err = post_one_recv(rq, wr);
 908                 if (unlikely(err)) {
 909                         *bad_wr = wr;
 910                         break;
 911                 }
 912                 wr = wr->next;
 913         }
 914
 915         spin_unlock_irqrestore(&rq->producer_lock, flags);
 916
 917 err1:
 918         return err;
 919 }
 920
 921 static struct ib_cq *rxe_create_cq(struct ib_device *dev,
 922                                    const struct ib_cq_init_attr *attr,
 923                                    struct ib_ucontext *context,
 924                                    struct ib_udata *udata)
 925 {
 926         int err;
 927         struct rxe_dev *rxe = to_rdev(dev);
 928         struct rxe_cq *cq;
 929
 930         if (attr->flags)
 931                 return ERR_PTR(-EINVAL);
 932
 933         err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
 934         if (err)
 935                 goto err1;
 936
 937         cq = rxe_alloc(&rxe->cq_pool);
 938         if (!cq) {
 939                 err = -ENOMEM;
 940                 goto err1;
 941         }
 942
 943         err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
 944                                context, udata);
 945         if (err)
 946                 goto err2;
 947
 948         return &cq->ibcq;
 949
 950 err2:
 951         rxe_drop_ref(cq);
 952 err1:
 953         return ERR_PTR(err);
 954 }
 955
 956 static int rxe_destroy_cq(struct ib_cq *ibcq)
 957 {
 958         struct rxe_cq *cq = to_rcq(ibcq);
 959
 960         rxe_drop_ref(cq);
 961         return 0;
 962 }
 963
 964 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
 965 {
 966         int err;
 967         struct rxe_cq *cq = to_rcq(ibcq);
 968         struct rxe_dev *rxe = to_rdev(ibcq->device);
 969
 970         err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
 971         if (err)
 972                 goto err1;
 973
 974         err = rxe_cq_resize_queue(cq, cqe, udata);
 975         if (err)
 976                 goto err1;
 977
 978         return 0;
 979
 980 err1:
 981         return err;
 982 }
 983
 984 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 985 {
 986         int i;
 987         struct rxe_cq *cq = to_rcq(ibcq);
 988         struct rxe_cqe *cqe;
 989         unsigned long flags;
 990
 991         spin_lock_irqsave(&cq->cq_lock, flags);
 992         for (i = 0; i < num_entries; i++) {
 993                 cqe = queue_head(cq->queue);
 994                 if (!cqe)
 995                         break;
 996
 997                 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
 998                 advance_consumer(cq->queue);
 999         }
1000         spin_unlock_irqrestore(&cq->cq_lock, flags);
1001
1002         return i;
1003 }
1004
1005 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
1006 {
1007         struct rxe_cq *cq = to_rcq(ibcq);
1008         int count = queue_count(cq->queue);
1009
1010         return (count > wc_cnt) ? wc_cnt : count;
1011 }
1012
1013 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
1014 {
1015         struct rxe_cq *cq = to_rcq(ibcq);
1016         unsigned long irq_flags;
1017         int ret = 0;
1018
1019         spin_lock_irqsave(&cq->cq_lock, irq_flags);
1020         if (cq->notify != IB_CQ_NEXT_COMP)
1021                 cq->notify = flags & IB_CQ_SOLICITED_MASK;
1022
1023         if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue))
1024                 ret = 1;
1025
1026         spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
1027
1028         return ret;
1029 }
1030
1031 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1032 {
1033         struct rxe_dev *rxe = to_rdev(ibpd->device);
1034         struct rxe_pd *pd = to_rpd(ibpd);
1035         struct rxe_mem *mr;
1036         int err;
1037
1038         mr = rxe_alloc(&rxe->mr_pool);
1039         if (!mr) {
1040                 err = -ENOMEM;
1041                 goto err1;
1042         }
1043
1044         rxe_add_index(mr);
1045
1046         rxe_add_ref(pd);
1047
1048         err = rxe_mem_init_dma(rxe, pd, access, mr);
1049         if (err)
1050                 goto err2;
1051
1052         return &mr->ibmr;
1053
1054 err2:
1055         rxe_drop_ref(pd);
1056         rxe_drop_index(mr);
1057         rxe_drop_ref(mr);
1058 err1:
1059         return ERR_PTR(err);
1060 }
1061
1062 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1063                                      u64 start,
1064                                      u64 length,
1065                                      u64 iova,
1066                                      int access, struct ib_udata *udata)
1067 {
1068         int err;
1069         struct rxe_dev *rxe = to_rdev(ibpd->device);
1070         struct rxe_pd *pd = to_rpd(ibpd);
1071         struct rxe_mem *mr;
1072
1073         mr = rxe_alloc(&rxe->mr_pool);
1074         if (!mr) {
1075                 err = -ENOMEM;
1076                 goto err2;
1077         }
1078
1079         rxe_add_index(mr);
1080
1081         rxe_add_ref(pd);
1082
1083         err = rxe_mem_init_user(rxe, pd, start, length, iova,
1084                                 access, udata, mr);
1085         if (err)
1086                 goto err3;
1087
1088         return &mr->ibmr;
1089
1090 err3:
1091         rxe_drop_ref(pd);
1092         rxe_drop_index(mr);
1093         rxe_drop_ref(mr);
1094 err2:
1095         return ERR_PTR(err);
1096 }
1097
1098 static int rxe_dereg_mr(struct ib_mr *ibmr)
1099 {
1100         struct rxe_mem *mr = to_rmr(ibmr);
1101
1102         mr->state = RXE_MEM_STATE_ZOMBIE;
1103         rxe_drop_ref(mr->pd);
1104         rxe_drop_index(mr);
1105         rxe_drop_ref(mr);
1106         return 0;
1107 }
1108
1109 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1110                                   enum ib_mr_type mr_type,
1111                                   u32 max_num_sg)
1112 {
1113         struct rxe_dev *rxe = to_rdev(ibpd->device);
1114         struct rxe_pd *pd = to_rpd(ibpd);
1115         struct rxe_mem *mr;
1116         int err;
1117
1118         if (mr_type != IB_MR_TYPE_MEM_REG)
1119                 return ERR_PTR(-EINVAL);
1120
1121         mr = rxe_alloc(&rxe->mr_pool);
1122         if (!mr) {
1123                 err = -ENOMEM;
1124                 goto err1;
1125         }
1126
1127         rxe_add_index(mr);
1128
1129         rxe_add_ref(pd);
1130
1131         err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1132         if (err)
1133                 goto err2;
1134
1135         return &mr->ibmr;
1136
1137 err2:
1138         rxe_drop_ref(pd);
1139         rxe_drop_index(mr);
1140         rxe_drop_ref(mr);
1141 err1:
1142         return ERR_PTR(err);
1143 }
1144
1145 static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1146 {
1147         struct rxe_mem *mr = to_rmr(ibmr);
1148         struct rxe_map *map;
1149         struct rxe_phys_buf *buf;
1150
1151         if (unlikely(mr->nbuf == mr->num_buf))
1152                 return -ENOMEM;
1153
1154         map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1155         buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1156
1157         buf->addr = addr;
1158         buf->size = ibmr->page_size;
1159         mr->nbuf++;
1160
1161         return 0;
1162 }
1163
1164 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1165                          int sg_nents, unsigned int *sg_offset)
1166 {
1167         struct rxe_mem *mr = to_rmr(ibmr);
1168         int n;
1169
1170         mr->nbuf = 0;
1171
1172         n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1173
1174         mr->va = ibmr->iova;
1175         mr->iova = ibmr->iova;
1176         mr->length = ibmr->length;
1177         mr->page_shift = ilog2(ibmr->page_size);
1178         mr->page_mask = ibmr->page_size - 1;
1179         mr->offset = mr->iova & mr->page_mask;
1180
1181         return n;
1182 }
1183
1184 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1185 {
1186         int err;
1187         struct rxe_dev *rxe = to_rdev(ibqp->device);
1188         struct rxe_qp *qp = to_rqp(ibqp);
1189         struct rxe_mc_grp *grp;
1190
1191         /* takes a ref on grp if successful */
1192         err = rxe_mcast_get_grp(rxe, mgid, &grp);
1193         if (err)
1194                 return err;
1195
1196         err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1197
1198         rxe_drop_ref(grp);
1199         return err;
1200 }
1201
1202 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1203 {
1204         struct rxe_dev *rxe = to_rdev(ibqp->device);
1205         struct rxe_qp *qp = to_rqp(ibqp);
1206
1207         return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1208 }
1209
1210 static ssize_t rxe_show_parent(struct device *device,
1211                                struct device_attribute *attr, char *buf)
1212 {
1213         struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1214                                            ib_dev.dev);
1215
1216         return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1));
1217 }
1218
1219 static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1220
1221 static struct device_attribute *rxe_dev_attributes[] = {
1222         &dev_attr_parent,
1223 };
1224
1225 int rxe_register_device(struct rxe_dev *rxe)
1226 {
1227         int err;
1228         int i;
1229         struct ib_device *dev = &rxe->ib_dev;
1230
1231         strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1232         strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1233
1234         dev->owner = THIS_MODULE;
1235         dev->node_type = RDMA_NODE_IB_CA;
1236         dev->phys_port_cnt = 1;
1237         dev->num_comp_vectors = num_possible_cpus();
1238         dev->dev.parent = rxe_dma_device(rxe);
1239         dev->local_dma_lkey = 0;
1240         addrconf_addr_eui48((unsigned char *)&dev->node_guid,
1241                             rxe->ndev->dev_addr);
1242         dev->dev.dma_ops = &dma_virt_ops;
1243
1244         dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1245         dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1246             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1247             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1248             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1249             | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1250             | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1251             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1252             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1253             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1254             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1255             | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1256             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1257             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1258             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1259             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1260             | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1261             | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1262             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1263             | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1264             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1265             | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1266             | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1267             | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1268             | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1269             | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1270             | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1271             | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1272             | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1273             | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1274             | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1275             | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1276             ;
1277
1278         dev->query_device = rxe_query_device;
1279         dev->modify_device = rxe_modify_device;
1280         dev->query_port = rxe_query_port;
1281         dev->modify_port = rxe_modify_port;
1282         dev->get_link_layer = rxe_get_link_layer;
1283         dev->query_gid = rxe_query_gid;
1284         dev->get_netdev = rxe_get_netdev;
1285         dev->add_gid = rxe_add_gid;
1286         dev->del_gid = rxe_del_gid;
1287         dev->query_pkey = rxe_query_pkey;
1288         dev->alloc_ucontext = rxe_alloc_ucontext;
1289         dev->dealloc_ucontext = rxe_dealloc_ucontext;
1290         dev->mmap = rxe_mmap;
1291         dev->get_port_immutable = rxe_port_immutable;
1292         dev->alloc_pd = rxe_alloc_pd;
1293         dev->dealloc_pd = rxe_dealloc_pd;
1294         dev->create_ah = rxe_create_ah;
1295         dev->modify_ah = rxe_modify_ah;
1296         dev->query_ah = rxe_query_ah;
1297         dev->destroy_ah = rxe_destroy_ah;
1298         dev->create_srq = rxe_create_srq;
1299         dev->modify_srq = rxe_modify_srq;
1300         dev->query_srq = rxe_query_srq;
1301         dev->destroy_srq = rxe_destroy_srq;
1302         dev->post_srq_recv = rxe_post_srq_recv;
1303         dev->create_qp = rxe_create_qp;
1304         dev->modify_qp = rxe_modify_qp;
1305         dev->query_qp = rxe_query_qp;
1306         dev->destroy_qp = rxe_destroy_qp;
1307         dev->post_send = rxe_post_send;
1308         dev->post_recv = rxe_post_recv;
1309         dev->create_cq = rxe_create_cq;
1310         dev->destroy_cq = rxe_destroy_cq;
1311         dev->resize_cq = rxe_resize_cq;
1312         dev->poll_cq = rxe_poll_cq;
1313         dev->peek_cq = rxe_peek_cq;
1314         dev->req_notify_cq = rxe_req_notify_cq;
1315         dev->get_dma_mr = rxe_get_dma_mr;
1316         dev->reg_user_mr = rxe_reg_user_mr;
1317         dev->dereg_mr = rxe_dereg_mr;
1318         dev->alloc_mr = rxe_alloc_mr;
1319         dev->map_mr_sg = rxe_map_mr_sg;
1320         dev->attach_mcast = rxe_attach_mcast;
1321         dev->detach_mcast = rxe_detach_mcast;
1322         dev->get_hw_stats = rxe_ib_get_hw_stats;
1323         dev->alloc_hw_stats = rxe_ib_alloc_hw_stats;
1324
1325         rxe->tfm = crypto_alloc_shash("crc32", 0, 0);
1326         if (IS_ERR(rxe->tfm)) {
1327                 pr_err("failed to allocate crc algorithm err:%ld\n",
1328                        PTR_ERR(rxe->tfm));
1329                 return PTR_ERR(rxe->tfm);
1330         }
1331
1332         err = ib_register_device(dev, NULL);
1333         if (err) {
1334                 pr_warn("rxe_register_device failed, err = %d\n", err);
1335                 goto err1;
1336         }
1337
1338         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1339                 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1340                 if (err) {
1341                         pr_warn("device_create_file failed, i = %d, err = %d\n",
1342                                 i, err);
1343                         goto err2;
1344                 }
1345         }
1346
1347         return 0;
1348
1349 err2:
1350         ib_unregister_device(dev);
1351 err1:
1352         crypto_free_shash(rxe->tfm);
1353
1354         return err;
1355 }
1356
1357 int rxe_unregister_device(struct rxe_dev *rxe)
1358 {
1359         int i;
1360         struct ib_device *dev = &rxe->ib_dev;
1361
1362         for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1363                 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1364
1365         ib_unregister_device(dev);
1366
1367         return 0;
1368 }