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