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