root/drivers/infiniband/sw/rxe/rxe_verbs.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. rxe_query_device
  2. rxe_query_port
  3. rxe_query_pkey
  4. rxe_modify_device
  5. rxe_modify_port
  6. rxe_get_link_layer
  7. rxe_alloc_ucontext
  8. rxe_dealloc_ucontext
  9. rxe_port_immutable
  10. rxe_alloc_pd
  11. rxe_dealloc_pd
  12. rxe_create_ah
  13. rxe_modify_ah
  14. rxe_query_ah
  15. rxe_destroy_ah
  16. post_one_recv
  17. rxe_create_srq
  18. rxe_modify_srq
  19. rxe_query_srq
  20. rxe_destroy_srq
  21. rxe_post_srq_recv
  22. rxe_create_qp
  23. rxe_modify_qp
  24. rxe_query_qp
  25. rxe_destroy_qp
  26. validate_send_wr
  27. init_send_wr
  28. init_send_wqe
  29. post_one_send
  30. rxe_post_send_kernel
  31. rxe_post_send
  32. rxe_post_recv
  33. rxe_create_cq
  34. rxe_destroy_cq
  35. rxe_resize_cq
  36. rxe_poll_cq
  37. rxe_peek_cq
  38. rxe_req_notify_cq
  39. rxe_get_dma_mr
  40. rxe_reg_user_mr
  41. rxe_dereg_mr
  42. rxe_alloc_mr
  43. rxe_set_page
  44. rxe_map_mr_sg
  45. rxe_attach_mcast
  46. rxe_detach_mcast
  47. parent_show
  48. rxe_enable_driver
  49. rxe_register_device

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

/* [<][>][^][v][top][bottom][index][help] */