drivers/infiniband/sw/rdmavt/vt.c

   1 /*
   2  * Copyright(c) 2016 - 2018 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47
  48 #include <linux/module.h>
  49 #include <linux/kernel.h>
  50 #include <linux/dma-mapping.h>
  51 #include "vt.h"
  52 #include "cq.h"
  53 #include "trace.h"
  54
  55 #define RVT_UVERBS_ABI_VERSION 2
  56
  57 MODULE_LICENSE("Dual BSD/GPL");
  58 MODULE_DESCRIPTION("RDMA Verbs Transport Library");
  59
  60 static int rvt_init(void)
  61 {
  62         int ret = rvt_driver_cq_init();
  63
  64         if (ret)
  65                 pr_err("Error in driver CQ init.\n");
  66
  67         return ret;
  68 }
  69 module_init(rvt_init);
  70
  71 static void rvt_cleanup(void)
  72 {
  73         rvt_cq_exit();
  74 }
  75 module_exit(rvt_cleanup);
  76
  77 /**
  78  * rvt_alloc_device - allocate rdi
  79  * @size: how big of a structure to allocate
  80  * @nports: number of ports to allocate array slots for
  81  *
  82  * Use IB core device alloc to allocate space for the rdi which is assumed to be
  83  * inside of the ib_device. Any extra space that drivers require should be
  84  * included in size.
  85  *
  86  * We also allocate a port array based on the number of ports.
  87  *
  88  * Return: pointer to allocated rdi
  89  */
  90 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
  91 {
  92         struct rvt_dev_info *rdi;
  93
  94         rdi = (struct rvt_dev_info *)ib_alloc_device(size);
  95         if (!rdi)
  96                 return rdi;
  97
  98         rdi->ports = kcalloc(nports,
  99                              sizeof(struct rvt_ibport **),
 100                              GFP_KERNEL);
 101         if (!rdi->ports)
 102                 ib_dealloc_device(&rdi->ibdev);
 103
 104         return rdi;
 105 }
 106 EXPORT_SYMBOL(rvt_alloc_device);
 107
 108 /**
 109  * rvt_dealloc_device - deallocate rdi
 110  * @rdi: structure to free
 111  *
 112  * Free a structure allocated with rvt_alloc_device()
 113  */
 114 void rvt_dealloc_device(struct rvt_dev_info *rdi)
 115 {
 116         kfree(rdi->ports);
 117         ib_dealloc_device(&rdi->ibdev);
 118 }
 119 EXPORT_SYMBOL(rvt_dealloc_device);
 120
 121 static int rvt_query_device(struct ib_device *ibdev,
 122                             struct ib_device_attr *props,
 123                             struct ib_udata *uhw)
 124 {
 125         struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
 126
 127         if (uhw->inlen || uhw->outlen)
 128                 return -EINVAL;
 129         /*
 130          * Return rvt_dev_info.dparms.props contents
 131          */
 132         *props = rdi->dparms.props;
 133         return 0;
 134 }
 135
 136 static int rvt_modify_device(struct ib_device *device,
 137                              int device_modify_mask,
 138                              struct ib_device_modify *device_modify)
 139 {
 140         /*
 141          * There is currently no need to supply this based on qib and hfi1.
 142          * Future drivers may need to implement this though.
 143          */
 144
 145         return -EOPNOTSUPP;
 146 }
 147
 148 /**
 149  * rvt_query_port: Passes the query port call to the driver
 150  * @ibdev: Verbs IB dev
 151  * @port_num: port number, 1 based from ib core
 152  * @props: structure to hold returned properties
 153  *
 154  * Return: 0 on success
 155  */
 156 static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
 157                           struct ib_port_attr *props)
 158 {
 159         struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
 160         struct rvt_ibport *rvp;
 161         int port_index = ibport_num_to_idx(ibdev, port_num);
 162
 163         if (port_index < 0)
 164                 return -EINVAL;
 165
 166         rvp = rdi->ports[port_index];
 167         /* props being zeroed by the caller, avoid zeroing it here */
 168         props->sm_lid = rvp->sm_lid;
 169         props->sm_sl = rvp->sm_sl;
 170         props->port_cap_flags = rvp->port_cap_flags;
 171         props->max_msg_sz = 0x80000000;
 172         props->pkey_tbl_len = rvt_get_npkeys(rdi);
 173         props->bad_pkey_cntr = rvp->pkey_violations;
 174         props->qkey_viol_cntr = rvp->qkey_violations;
 175         props->subnet_timeout = rvp->subnet_timeout;
 176         props->init_type_reply = 0;
 177
 178         /* Populate the remaining ib_port_attr elements */
 179         return rdi->driver_f.query_port_state(rdi, port_num, props);
 180 }
 181
 182 /**
 183  * rvt_modify_port
 184  * @ibdev: Verbs IB dev
 185  * @port_num: Port number, 1 based from ib core
 186  * @port_modify_mask: How to change the port
 187  * @props: Structure to fill in
 188  *
 189  * Return: 0 on success
 190  */
 191 static int rvt_modify_port(struct ib_device *ibdev, u8 port_num,
 192                            int port_modify_mask, struct ib_port_modify *props)
 193 {
 194         struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
 195         struct rvt_ibport *rvp;
 196         int ret = 0;
 197         int port_index = ibport_num_to_idx(ibdev, port_num);
 198
 199         if (port_index < 0)
 200                 return -EINVAL;
 201
 202         rvp = rdi->ports[port_index];
 203         if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {
 204                 rvp->port_cap3_flags |= props->set_port_cap_mask;
 205                 rvp->port_cap3_flags &= ~props->clr_port_cap_mask;
 206         } else {
 207                 rvp->port_cap_flags |= props->set_port_cap_mask;
 208                 rvp->port_cap_flags &= ~props->clr_port_cap_mask;
 209         }
 210
 211         if (props->set_port_cap_mask || props->clr_port_cap_mask)
 212                 rdi->driver_f.cap_mask_chg(rdi, port_num);
 213         if (port_modify_mask & IB_PORT_SHUTDOWN)
 214                 ret = rdi->driver_f.shut_down_port(rdi, port_num);
 215         if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
 216                 rvp->qkey_violations = 0;
 217
 218         return ret;
 219 }
 220
 221 /**
 222  * rvt_query_pkey - Return a pkey from the table at a given index
 223  * @ibdev: Verbs IB dev
 224  * @port_num: Port number, 1 based from ib core
 225  * @index: Index into pkey table
 226  * @pkey: returned pkey from the port pkey table
 227  *
 228  * Return: 0 on failure pkey otherwise
 229  */
 230 static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
 231                           u16 *pkey)
 232 {
 233         /*
 234          * Driver will be responsible for keeping rvt_dev_info.pkey_table up to
 235          * date. This function will just return that value. There is no need to
 236          * lock, if a stale value is read and sent to the user so be it there is
 237          * no way to protect against that anyway.
 238          */
 239         struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
 240         int port_index;
 241
 242         port_index = ibport_num_to_idx(ibdev, port_num);
 243         if (port_index < 0)
 244                 return -EINVAL;
 245
 246         if (index >= rvt_get_npkeys(rdi))
 247                 return -EINVAL;
 248
 249         *pkey = rvt_get_pkey(rdi, port_index, index);
 250         return 0;
 251 }
 252
 253 /**
 254  * rvt_query_gid - Return a gid from the table
 255  * @ibdev: Verbs IB dev
 256  * @port_num: Port number, 1 based from ib core
 257  * @guid_index: Index in table
 258  * @gid: Gid to return
 259  *
 260  * Return: 0 on success
 261  */
 262 static int rvt_query_gid(struct ib_device *ibdev, u8 port_num,
 263                          int guid_index, union ib_gid *gid)
 264 {
 265         struct rvt_dev_info *rdi;
 266         struct rvt_ibport *rvp;
 267         int port_index;
 268
 269         /*
 270          * Driver is responsible for updating the guid table. Which will be used
 271          * to craft the return value. This will work similar to how query_pkey()
 272          * is being done.
 273          */
 274         port_index = ibport_num_to_idx(ibdev, port_num);
 275         if (port_index < 0)
 276                 return -EINVAL;
 277
 278         rdi = ib_to_rvt(ibdev);
 279         rvp = rdi->ports[port_index];
 280
 281         gid->global.subnet_prefix = rvp->gid_prefix;
 282
 283         return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,
 284                                          &gid->global.interface_id);
 285 }
 286
 287 struct rvt_ucontext {
 288         struct ib_ucontext ibucontext;
 289 };
 290
 291 static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext
 292                                                 *ibucontext)
 293 {
 294         return container_of(ibucontext, struct rvt_ucontext, ibucontext);
 295 }
 296
 297 /**
 298  * rvt_alloc_ucontext - Allocate a user context
 299  * @ibdev: Verbs IB dev
 300  * @udata: User data allocated
 301  */
 302 static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
 303                                               struct ib_udata *udata)
 304 {
 305         struct rvt_ucontext *context;
 306
 307         context = kmalloc(sizeof(*context), GFP_KERNEL);
 308         if (!context)
 309                 return ERR_PTR(-ENOMEM);
 310         return &context->ibucontext;
 311 }
 312
 313 /**
 314  *rvt_dealloc_ucontext - Free a user context
 315  *@context - Free this
 316  */
 317 static int rvt_dealloc_ucontext(struct ib_ucontext *context)
 318 {
 319         kfree(to_iucontext(context));
 320         return 0;
 321 }
 322
 323 static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num,
 324                                   struct ib_port_immutable *immutable)
 325 {
 326         struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
 327         struct ib_port_attr attr;
 328         int err, port_index;
 329
 330         port_index = ibport_num_to_idx(ibdev, port_num);
 331         if (port_index < 0)
 332                 return -EINVAL;
 333
 334         immutable->core_cap_flags = rdi->dparms.core_cap_flags;
 335
 336         err = ib_query_port(ibdev, port_num, &attr);
 337         if (err)
 338                 return err;
 339
 340         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 341         immutable->gid_tbl_len = attr.gid_tbl_len;
 342         immutable->max_mad_size = rdi->dparms.max_mad_size;
 343
 344         return 0;
 345 }
 346
 347 enum {
 348         MISC,
 349         QUERY_DEVICE,
 350         MODIFY_DEVICE,
 351         QUERY_PORT,
 352         MODIFY_PORT,
 353         QUERY_PKEY,
 354         QUERY_GID,
 355         ALLOC_UCONTEXT,
 356         DEALLOC_UCONTEXT,
 357         GET_PORT_IMMUTABLE,
 358         CREATE_QP,
 359         MODIFY_QP,
 360         DESTROY_QP,
 361         QUERY_QP,
 362         POST_SEND,
 363         POST_RECV,
 364         POST_SRQ_RECV,
 365         CREATE_AH,
 366         DESTROY_AH,
 367         MODIFY_AH,
 368         QUERY_AH,
 369         CREATE_SRQ,
 370         MODIFY_SRQ,
 371         DESTROY_SRQ,
 372         QUERY_SRQ,
 373         ATTACH_MCAST,
 374         DETACH_MCAST,
 375         GET_DMA_MR,
 376         REG_USER_MR,
 377         DEREG_MR,
 378         ALLOC_MR,
 379         MAP_MR_SG,
 380         ALLOC_FMR,
 381         MAP_PHYS_FMR,
 382         UNMAP_FMR,
 383         DEALLOC_FMR,
 384         MMAP,
 385         CREATE_CQ,
 386         DESTROY_CQ,
 387         POLL_CQ,
 388         REQ_NOTFIY_CQ,
 389         RESIZE_CQ,
 390         ALLOC_PD,
 391         DEALLOC_PD,
 392         _VERB_IDX_MAX /* Must always be last! */
 393 };
 394
 395 static inline int check_driver_override(struct rvt_dev_info *rdi,
 396                                         size_t offset, void *func)
 397 {
 398         if (!*(void **)((void *)&rdi->ibdev + offset)) {
 399                 *(void **)((void *)&rdi->ibdev + offset) = func;
 400                 return 0;
 401         }
 402
 403         return 1;
 404 }
 405
 406 static noinline int check_support(struct rvt_dev_info *rdi, int verb)
 407 {
 408         switch (verb) {
 409         case MISC:
 410                 /*
 411                  * These functions are not part of verbs specifically but are
 412                  * required for rdmavt to function.
 413                  */
 414                 if ((!rdi->driver_f.port_callback) ||
 415                     (!rdi->driver_f.get_pci_dev))
 416                         return -EINVAL;
 417                 break;
 418
 419         case QUERY_DEVICE:
 420                 check_driver_override(rdi, offsetof(struct ib_device,
 421                                                     query_device),
 422                                                     rvt_query_device);
 423                 break;
 424
 425         case MODIFY_DEVICE:
 426                 /*
 427                  * rdmavt does not support modify device currently drivers must
 428                  * provide.
 429                  */
 430                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 431                                                          modify_device),
 432                                            rvt_modify_device))
 433                         return -EOPNOTSUPP;
 434                 break;
 435
 436         case QUERY_PORT:
 437                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 438                                                          query_port),
 439                                            rvt_query_port))
 440                         if (!rdi->driver_f.query_port_state)
 441                                 return -EINVAL;
 442                 break;
 443
 444         case MODIFY_PORT:
 445                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 446                                                          modify_port),
 447                                            rvt_modify_port))
 448                         if (!rdi->driver_f.cap_mask_chg ||
 449                             !rdi->driver_f.shut_down_port)
 450                                 return -EINVAL;
 451                 break;
 452
 453         case QUERY_PKEY:
 454                 check_driver_override(rdi, offsetof(struct ib_device,
 455                                                     query_pkey),
 456                                       rvt_query_pkey);
 457                 break;
 458
 459         case QUERY_GID:
 460                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 461                                                          query_gid),
 462                                            rvt_query_gid))
 463                         if (!rdi->driver_f.get_guid_be)
 464                                 return -EINVAL;
 465                 break;
 466
 467         case ALLOC_UCONTEXT:
 468                 check_driver_override(rdi, offsetof(struct ib_device,
 469                                                     alloc_ucontext),
 470                                       rvt_alloc_ucontext);
 471                 break;
 472
 473         case DEALLOC_UCONTEXT:
 474                 check_driver_override(rdi, offsetof(struct ib_device,
 475                                                     dealloc_ucontext),
 476                                       rvt_dealloc_ucontext);
 477                 break;
 478
 479         case GET_PORT_IMMUTABLE:
 480                 check_driver_override(rdi, offsetof(struct ib_device,
 481                                                     get_port_immutable),
 482                                       rvt_get_port_immutable);
 483                 break;
 484
 485         case CREATE_QP:
 486                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 487                                                          create_qp),
 488                                            rvt_create_qp))
 489                         if (!rdi->driver_f.qp_priv_alloc ||
 490                             !rdi->driver_f.qp_priv_free ||
 491                             !rdi->driver_f.notify_qp_reset ||
 492                             !rdi->driver_f.flush_qp_waiters ||
 493                             !rdi->driver_f.stop_send_queue ||
 494                             !rdi->driver_f.quiesce_qp)
 495                                 return -EINVAL;
 496                 break;
 497
 498         case MODIFY_QP:
 499                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 500                                                          modify_qp),
 501                                            rvt_modify_qp))
 502                         if (!rdi->driver_f.notify_qp_reset ||
 503                             !rdi->driver_f.schedule_send ||
 504                             !rdi->driver_f.get_pmtu_from_attr ||
 505                             !rdi->driver_f.flush_qp_waiters ||
 506                             !rdi->driver_f.stop_send_queue ||
 507                             !rdi->driver_f.quiesce_qp ||
 508                             !rdi->driver_f.notify_error_qp ||
 509                             !rdi->driver_f.mtu_from_qp ||
 510                             !rdi->driver_f.mtu_to_path_mtu)
 511                                 return -EINVAL;
 512                 break;
 513
 514         case DESTROY_QP:
 515                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 516                                                          destroy_qp),
 517                                            rvt_destroy_qp))
 518                         if (!rdi->driver_f.qp_priv_free ||
 519                             !rdi->driver_f.notify_qp_reset ||
 520                             !rdi->driver_f.flush_qp_waiters ||
 521                             !rdi->driver_f.stop_send_queue ||
 522                             !rdi->driver_f.quiesce_qp)
 523                                 return -EINVAL;
 524                 break;
 525
 526         case QUERY_QP:
 527                 check_driver_override(rdi, offsetof(struct ib_device,
 528                                                     query_qp),
 529                                                     rvt_query_qp);
 530                 break;
 531
 532         case POST_SEND:
 533                 if (!check_driver_override(rdi, offsetof(struct ib_device,
 534                                                          post_send),
 535                                            rvt_post_send))
 536                         if (!rdi->driver_f.schedule_send ||
 537                             !rdi->driver_f.do_send ||
 538                             !rdi->post_parms)
 539                                 return -EINVAL;
 540                 break;
 541
 542         case POST_RECV:
 543                 check_driver_override(rdi, offsetof(struct ib_device,
 544                                                     post_recv),
 545                                       rvt_post_recv);
 546                 break;
 547         case POST_SRQ_RECV:
 548                 check_driver_override(rdi, offsetof(struct ib_device,
 549                                                     post_srq_recv),
 550                                       rvt_post_srq_recv);
 551                 break;
 552
 553         case CREATE_AH:
 554                 check_driver_override(rdi, offsetof(struct ib_device,
 555                                                     create_ah),
 556                                       rvt_create_ah);
 557                 break;
 558
 559         case DESTROY_AH:
 560                 check_driver_override(rdi, offsetof(struct ib_device,
 561                                                     destroy_ah),
 562                                       rvt_destroy_ah);
 563                 break;
 564
 565         case MODIFY_AH:
 566                 check_driver_override(rdi, offsetof(struct ib_device,
 567                                                     modify_ah),
 568                                       rvt_modify_ah);
 569                 break;
 570
 571         case QUERY_AH:
 572                 check_driver_override(rdi, offsetof(struct ib_device,
 573                                                     query_ah),
 574                                       rvt_query_ah);
 575                 break;
 576
 577         case CREATE_SRQ:
 578                 check_driver_override(rdi, offsetof(struct ib_device,
 579                                                     create_srq),
 580                                       rvt_create_srq);
 581                 break;
 582
 583         case MODIFY_SRQ:
 584                 check_driver_override(rdi, offsetof(struct ib_device,
 585                                                     modify_srq),
 586                                       rvt_modify_srq);
 587                 break;
 588
 589         case DESTROY_SRQ:
 590                 check_driver_override(rdi, offsetof(struct ib_device,
 591                                                     destroy_srq),
 592                                       rvt_destroy_srq);
 593                 break;
 594
 595         case QUERY_SRQ:
 596                 check_driver_override(rdi, offsetof(struct ib_device,
 597                                                     query_srq),
 598                                       rvt_query_srq);
 599                 break;
 600
 601         case ATTACH_MCAST:
 602                 check_driver_override(rdi, offsetof(struct ib_device,
 603                                                     attach_mcast),
 604                                       rvt_attach_mcast);
 605                 break;
 606
 607         case DETACH_MCAST:
 608                 check_driver_override(rdi, offsetof(struct ib_device,
 609                                                     detach_mcast),
 610                                       rvt_detach_mcast);
 611                 break;
 612
 613         case GET_DMA_MR:
 614                 check_driver_override(rdi, offsetof(struct ib_device,
 615                                                     get_dma_mr),
 616                                       rvt_get_dma_mr);
 617                 break;
 618
 619         case REG_USER_MR:
 620                 check_driver_override(rdi, offsetof(struct ib_device,
 621                                                     reg_user_mr),
 622                                       rvt_reg_user_mr);
 623                 break;
 624
 625         case DEREG_MR:
 626                 check_driver_override(rdi, offsetof(struct ib_device,
 627                                                     dereg_mr),
 628                                       rvt_dereg_mr);
 629                 break;
 630
 631         case ALLOC_FMR:
 632                 check_driver_override(rdi, offsetof(struct ib_device,
 633                                                     alloc_fmr),
 634                                       rvt_alloc_fmr);
 635                 break;
 636
 637         case ALLOC_MR:
 638                 check_driver_override(rdi, offsetof(struct ib_device,
 639                                                     alloc_mr),
 640                                       rvt_alloc_mr);
 641                 break;
 642
 643         case MAP_MR_SG:
 644                 check_driver_override(rdi, offsetof(struct ib_device,
 645                                                     map_mr_sg),
 646                                       rvt_map_mr_sg);
 647                 break;
 648
 649         case MAP_PHYS_FMR:
 650                 check_driver_override(rdi, offsetof(struct ib_device,
 651                                                     map_phys_fmr),
 652                                       rvt_map_phys_fmr);
 653                 break;
 654
 655         case UNMAP_FMR:
 656                 check_driver_override(rdi, offsetof(struct ib_device,
 657                                                     unmap_fmr),
 658                                       rvt_unmap_fmr);
 659                 break;
 660
 661         case DEALLOC_FMR:
 662                 check_driver_override(rdi, offsetof(struct ib_device,
 663                                                     dealloc_fmr),
 664                                       rvt_dealloc_fmr);
 665                 break;
 666
 667         case MMAP:
 668                 check_driver_override(rdi, offsetof(struct ib_device,
 669                                                     mmap),
 670                                       rvt_mmap);
 671                 break;
 672
 673         case CREATE_CQ:
 674                 check_driver_override(rdi, offsetof(struct ib_device,
 675                                                     create_cq),
 676                                       rvt_create_cq);
 677                 break;
 678
 679         case DESTROY_CQ:
 680                 check_driver_override(rdi, offsetof(struct ib_device,
 681                                                     destroy_cq),
 682                                       rvt_destroy_cq);
 683                 break;
 684
 685         case POLL_CQ:
 686                 check_driver_override(rdi, offsetof(struct ib_device,
 687                                                     poll_cq),
 688                                       rvt_poll_cq);
 689                 break;
 690
 691         case REQ_NOTFIY_CQ:
 692                 check_driver_override(rdi, offsetof(struct ib_device,
 693                                                     req_notify_cq),
 694                                       rvt_req_notify_cq);
 695                 break;
 696
 697         case RESIZE_CQ:
 698                 check_driver_override(rdi, offsetof(struct ib_device,
 699                                                     resize_cq),
 700                                       rvt_resize_cq);
 701                 break;
 702
 703         case ALLOC_PD:
 704                 check_driver_override(rdi, offsetof(struct ib_device,
 705                                                     alloc_pd),
 706                                       rvt_alloc_pd);
 707                 break;
 708
 709         case DEALLOC_PD:
 710                 check_driver_override(rdi, offsetof(struct ib_device,
 711                                                     dealloc_pd),
 712                                       rvt_dealloc_pd);
 713                 break;
 714
 715         default:
 716                 return -EINVAL;
 717         }
 718
 719         return 0;
 720 }
 721
 722 /**
 723  * rvt_register_device - register a driver
 724  * @rdi: main dev structure for all of rdmavt operations
 725  *
 726  * It is up to drivers to allocate the rdi and fill in the appropriate
 727  * information.
 728  *
 729  * Return: 0 on success otherwise an errno.
 730  */
 731 int rvt_register_device(struct rvt_dev_info *rdi, u32 driver_id)
 732 {
 733         int ret = 0, i;
 734
 735         if (!rdi)
 736                 return -EINVAL;
 737
 738         /*
 739          * Check to ensure drivers have setup the required helpers for the verbs
 740          * they want rdmavt to handle
 741          */
 742         for (i = 0; i < _VERB_IDX_MAX; i++)
 743                 if (check_support(rdi, i)) {
 744                         pr_err("Driver support req not met at %d\n", i);
 745                         return -EINVAL;
 746                 }
 747
 748
 749         /* Once we get past here we can use rvt_pr macros and tracepoints */
 750         trace_rvt_dbg(rdi, "Driver attempting registration");
 751         rvt_mmap_init(rdi);
 752
 753         /* Queue Pairs */
 754         ret = rvt_driver_qp_init(rdi);
 755         if (ret) {
 756                 pr_err("Error in driver QP init.\n");
 757                 return -EINVAL;
 758         }
 759
 760         /* Address Handle */
 761         spin_lock_init(&rdi->n_ahs_lock);
 762         rdi->n_ahs_allocated = 0;
 763
 764         /* Shared Receive Queue */
 765         rvt_driver_srq_init(rdi);
 766
 767         /* Multicast */
 768         rvt_driver_mcast_init(rdi);
 769
 770         /* Mem Region */
 771         ret = rvt_driver_mr_init(rdi);
 772         if (ret) {
 773                 pr_err("Error in driver MR init.\n");
 774                 goto bail_no_mr;
 775         }
 776
 777         /* Completion queues */
 778         spin_lock_init(&rdi->n_cqs_lock);
 779
 780         /* DMA Operations */
 781         rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops;
 782
 783         /* Protection Domain */
 784         spin_lock_init(&rdi->n_pds_lock);
 785         rdi->n_pds_allocated = 0;
 786
 787         /*
 788          * There are some things which could be set by underlying drivers but
 789          * really should be up to rdmavt to set. For instance drivers can't know
 790          * exactly which functions rdmavt supports, nor do they know the ABI
 791          * version, so we do all of this sort of stuff here.
 792          */
 793         rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION;
 794         rdi->ibdev.uverbs_cmd_mask =
 795                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 796                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 797                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 798                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 799                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 800                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 801                 (1ull << IB_USER_VERBS_CMD_MODIFY_AH)           |
 802                 (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 803                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH)          |
 804                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 805                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 806                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 807                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 808                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 809                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 810                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 811                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 812                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 813                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 814                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 815                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 816                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 817                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 818                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 819                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
 820                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 821                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 822                 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 823                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 824                 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 825         rdi->ibdev.node_type = RDMA_NODE_IB_CA;
 826         if (!rdi->ibdev.num_comp_vectors)
 827                 rdi->ibdev.num_comp_vectors = 1;
 828
 829         rdi->ibdev.driver_id = driver_id;
 830         /* We are now good to announce we exist */
 831         ret =  ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
 832         if (ret) {
 833                 rvt_pr_err(rdi, "Failed to register driver with ib core.\n");
 834                 goto bail_mr;
 835         }
 836
 837         rvt_create_mad_agents(rdi);
 838
 839         rvt_pr_info(rdi, "Registration with rdmavt done.\n");
 840         return ret;
 841
 842 bail_mr:
 843         rvt_mr_exit(rdi);
 844
 845 bail_no_mr:
 846         rvt_qp_exit(rdi);
 847
 848         return ret;
 849 }
 850 EXPORT_SYMBOL(rvt_register_device);
 851
 852 /**
 853  * rvt_unregister_device - remove a driver
 854  * @rdi: rvt dev struct
 855  */
 856 void rvt_unregister_device(struct rvt_dev_info *rdi)
 857 {
 858         trace_rvt_dbg(rdi, "Driver is unregistering.");
 859         if (!rdi)
 860                 return;
 861
 862         rvt_free_mad_agents(rdi);
 863
 864         ib_unregister_device(&rdi->ibdev);
 865         rvt_mr_exit(rdi);
 866         rvt_qp_exit(rdi);
 867 }
 868 EXPORT_SYMBOL(rvt_unregister_device);
 869
 870 /**
 871  * rvt_init_port - init internal data for driver port
 872  * @rdi: rvt dev strut
 873  * @port: rvt port
 874  * @port_index: 0 based index of ports, different from IB core port num
 875  *
 876  * Keep track of a list of ports. No need to have a detach port.
 877  * They persist until the driver goes away.
 878  *
 879  * Return: always 0
 880  */
 881 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
 882                   int port_index, u16 *pkey_table)
 883 {
 884
 885         rdi->ports[port_index] = port;
 886         rdi->ports[port_index]->pkey_table = pkey_table;
 887
 888         return 0;
 889 }
 890 EXPORT_SYMBOL(rvt_init_port);