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 <linux/dma-mapping.h> 51 #include "vt.h" 52 #include "trace.h" 53 54 #define RVT_UVERBS_ABI_VERSION 2 55 56 MODULE_LICENSE("Dual BSD/GPL"); 57 MODULE_DESCRIPTION("RDMA Verbs Transport Library"); 58 59 static int rvt_init(void) 60 { 61 /* 62 * rdmavt does not need to do anything special when it starts up. All it 63 * needs to do is sit and wait until a driver attempts registration. 64 */ 65 return 0; 66 } 67 module_init(rvt_init); 68 69 static void rvt_cleanup(void) 70 { 71 /* 72 * Nothing to do at exit time either. The module won't be able to be 73 * removed until all drivers are gone which means all the dev structs 74 * are gone so there is really nothing to do. 75 */ 76 } 77 module_exit(rvt_cleanup); 78 79 /** 80 * rvt_alloc_device - allocate rdi 81 * @size: how big of a structure to allocate 82 * @nports: number of ports to allocate array slots for 83 * 84 * Use IB core device alloc to allocate space for the rdi which is assumed to be 85 * inside of the ib_device. Any extra space that drivers require should be 86 * included in size. 87 * 88 * We also allocate a port array based on the number of ports. 89 * 90 * Return: pointer to allocated rdi 91 */ 92 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports) 93 { 94 struct rvt_dev_info *rdi = ERR_PTR(-ENOMEM); 95 96 rdi = (struct rvt_dev_info *)ib_alloc_device(size); 97 if (!rdi) 98 return rdi; 99 100 rdi->ports = kcalloc(nports, 101 sizeof(struct rvt_ibport **), 102 GFP_KERNEL); 103 if (!rdi->ports) 104 ib_dealloc_device(&rdi->ibdev); 105 106 return rdi; 107 } 108 EXPORT_SYMBOL(rvt_alloc_device); 109 110 /** 111 * rvt_dealloc_device - deallocate rdi 112 * @rdi: structure to free 113 * 114 * Free a structure allocated with rvt_alloc_device() 115 */ 116 void rvt_dealloc_device(struct rvt_dev_info *rdi) 117 { 118 kfree(rdi->ports); 119 ib_dealloc_device(&rdi->ibdev); 120 } 121 EXPORT_SYMBOL(rvt_dealloc_device); 122 123 static int rvt_query_device(struct ib_device *ibdev, 124 struct ib_device_attr *props, 125 struct ib_udata *uhw) 126 { 127 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 128 129 if (uhw->inlen || uhw->outlen) 130 return -EINVAL; 131 /* 132 * Return rvt_dev_info.dparms.props contents 133 */ 134 *props = rdi->dparms.props; 135 return 0; 136 } 137 138 static int rvt_modify_device(struct ib_device *device, 139 int device_modify_mask, 140 struct ib_device_modify *device_modify) 141 { 142 /* 143 * There is currently no need to supply this based on qib and hfi1. 144 * Future drivers may need to implement this though. 145 */ 146 147 return -EOPNOTSUPP; 148 } 149 150 /** 151 * rvt_query_port: Passes the query port call to the driver 152 * @ibdev: Verbs IB dev 153 * @port_num: port number, 1 based from ib core 154 * @props: structure to hold returned properties 155 * 156 * Return: 0 on success 157 */ 158 static int rvt_query_port(struct ib_device *ibdev, u8 port_num, 159 struct ib_port_attr *props) 160 { 161 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 162 struct rvt_ibport *rvp; 163 int port_index = ibport_num_to_idx(ibdev, port_num); 164 165 if (port_index < 0) 166 return -EINVAL; 167 168 rvp = rdi->ports[port_index]; 169 memset(props, 0, sizeof(*props)); 170 props->sm_lid = rvp->sm_lid; 171 props->sm_sl = rvp->sm_sl; 172 props->port_cap_flags = rvp->port_cap_flags; 173 props->max_msg_sz = 0x80000000; 174 props->pkey_tbl_len = rvt_get_npkeys(rdi); 175 props->bad_pkey_cntr = rvp->pkey_violations; 176 props->qkey_viol_cntr = rvp->qkey_violations; 177 props->subnet_timeout = rvp->subnet_timeout; 178 props->init_type_reply = 0; 179 180 /* Populate the remaining ib_port_attr elements */ 181 return rdi->driver_f.query_port_state(rdi, port_num, props); 182 } 183 184 /** 185 * rvt_modify_port 186 * @ibdev: Verbs IB dev 187 * @port_num: Port number, 1 based from ib core 188 * @port_modify_mask: How to change the port 189 * @props: Structure to fill in 190 * 191 * Return: 0 on success 192 */ 193 static int rvt_modify_port(struct ib_device *ibdev, u8 port_num, 194 int port_modify_mask, struct ib_port_modify *props) 195 { 196 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 197 struct rvt_ibport *rvp; 198 int ret = 0; 199 int port_index = ibport_num_to_idx(ibdev, port_num); 200 201 if (port_index < 0) 202 return -EINVAL; 203 204 rvp = rdi->ports[port_index]; 205 rvp->port_cap_flags |= props->set_port_cap_mask; 206 rvp->port_cap_flags &= ~props->clr_port_cap_mask; 207 208 if (props->set_port_cap_mask || props->clr_port_cap_mask) 209 rdi->driver_f.cap_mask_chg(rdi, port_num); 210 if (port_modify_mask & IB_PORT_SHUTDOWN) 211 ret = rdi->driver_f.shut_down_port(rdi, port_num); 212 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR) 213 rvp->qkey_violations = 0; 214 215 return ret; 216 } 217 218 /** 219 * rvt_query_pkey - Return a pkey from the table at a given index 220 * @ibdev: Verbs IB dev 221 * @port_num: Port number, 1 based from ib core 222 * @intex: Index into pkey table 223 * 224 * Return: 0 on failure pkey otherwise 225 */ 226 static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index, 227 u16 *pkey) 228 { 229 /* 230 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to 231 * date. This function will just return that value. There is no need to 232 * lock, if a stale value is read and sent to the user so be it there is 233 * no way to protect against that anyway. 234 */ 235 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 236 int port_index; 237 238 port_index = ibport_num_to_idx(ibdev, port_num); 239 if (port_index < 0) 240 return -EINVAL; 241 242 if (index >= rvt_get_npkeys(rdi)) 243 return -EINVAL; 244 245 *pkey = rvt_get_pkey(rdi, port_index, index); 246 return 0; 247 } 248 249 /** 250 * rvt_query_gid - Return a gid from the table 251 * @ibdev: Verbs IB dev 252 * @port_num: Port number, 1 based from ib core 253 * @index: = Index in table 254 * @gid: Gid to return 255 * 256 * Return: 0 on success 257 */ 258 static int rvt_query_gid(struct ib_device *ibdev, u8 port_num, 259 int guid_index, union ib_gid *gid) 260 { 261 struct rvt_dev_info *rdi; 262 struct rvt_ibport *rvp; 263 int port_index; 264 265 /* 266 * Driver is responsible for updating the guid table. Which will be used 267 * to craft the return value. This will work similar to how query_pkey() 268 * is being done. 269 */ 270 port_index = ibport_num_to_idx(ibdev, port_num); 271 if (port_index < 0) 272 return -EINVAL; 273 274 rdi = ib_to_rvt(ibdev); 275 rvp = rdi->ports[port_index]; 276 277 gid->global.subnet_prefix = rvp->gid_prefix; 278 279 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index, 280 &gid->global.interface_id); 281 } 282 283 struct rvt_ucontext { 284 struct ib_ucontext ibucontext; 285 }; 286 287 static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext 288 *ibucontext) 289 { 290 return container_of(ibucontext, struct rvt_ucontext, ibucontext); 291 } 292 293 /** 294 * rvt_alloc_ucontext - Allocate a user context 295 * @ibdev: Vers IB dev 296 * @data: User data allocated 297 */ 298 static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev, 299 struct ib_udata *udata) 300 { 301 struct rvt_ucontext *context; 302 303 context = kmalloc(sizeof(*context), GFP_KERNEL); 304 if (!context) 305 return ERR_PTR(-ENOMEM); 306 return &context->ibucontext; 307 } 308 309 /** 310 *rvt_dealloc_ucontext - Free a user context 311 *@context - Free this 312 */ 313 static int rvt_dealloc_ucontext(struct ib_ucontext *context) 314 { 315 kfree(to_iucontext(context)); 316 return 0; 317 } 318 319 static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num, 320 struct ib_port_immutable *immutable) 321 { 322 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 323 struct ib_port_attr attr; 324 int err, port_index; 325 326 port_index = ibport_num_to_idx(ibdev, port_num); 327 if (port_index < 0) 328 return -EINVAL; 329 330 err = rvt_query_port(ibdev, port_num, &attr); 331 if (err) 332 return err; 333 334 immutable->pkey_tbl_len = attr.pkey_tbl_len; 335 immutable->gid_tbl_len = attr.gid_tbl_len; 336 immutable->core_cap_flags = rdi->dparms.core_cap_flags; 337 immutable->max_mad_size = rdi->dparms.max_mad_size; 338 339 return 0; 340 } 341 342 enum { 343 MISC, 344 QUERY_DEVICE, 345 MODIFY_DEVICE, 346 QUERY_PORT, 347 MODIFY_PORT, 348 QUERY_PKEY, 349 QUERY_GID, 350 ALLOC_UCONTEXT, 351 DEALLOC_UCONTEXT, 352 GET_PORT_IMMUTABLE, 353 CREATE_QP, 354 MODIFY_QP, 355 DESTROY_QP, 356 QUERY_QP, 357 POST_SEND, 358 POST_RECV, 359 POST_SRQ_RECV, 360 CREATE_AH, 361 DESTROY_AH, 362 MODIFY_AH, 363 QUERY_AH, 364 CREATE_SRQ, 365 MODIFY_SRQ, 366 DESTROY_SRQ, 367 QUERY_SRQ, 368 ATTACH_MCAST, 369 DETACH_MCAST, 370 GET_DMA_MR, 371 REG_USER_MR, 372 DEREG_MR, 373 ALLOC_MR, 374 MAP_MR_SG, 375 ALLOC_FMR, 376 MAP_PHYS_FMR, 377 UNMAP_FMR, 378 DEALLOC_FMR, 379 MMAP, 380 CREATE_CQ, 381 DESTROY_CQ, 382 POLL_CQ, 383 REQ_NOTFIY_CQ, 384 RESIZE_CQ, 385 ALLOC_PD, 386 DEALLOC_PD, 387 _VERB_IDX_MAX /* Must always be last! */ 388 }; 389 390 static inline int check_driver_override(struct rvt_dev_info *rdi, 391 size_t offset, void *func) 392 { 393 if (!*(void **)((void *)&rdi->ibdev + offset)) { 394 *(void **)((void *)&rdi->ibdev + offset) = func; 395 return 0; 396 } 397 398 return 1; 399 } 400 401 static noinline int check_support(struct rvt_dev_info *rdi, int verb) 402 { 403 switch (verb) { 404 case MISC: 405 /* 406 * These functions are not part of verbs specifically but are 407 * required for rdmavt to function. 408 */ 409 if ((!rdi->driver_f.port_callback) || 410 (!rdi->driver_f.get_card_name) || 411 (!rdi->driver_f.get_pci_dev)) 412 return -EINVAL; 413 break; 414 415 case QUERY_DEVICE: 416 check_driver_override(rdi, offsetof(struct ib_device, 417 query_device), 418 rvt_query_device); 419 break; 420 421 case MODIFY_DEVICE: 422 /* 423 * rdmavt does not support modify device currently drivers must 424 * provide. 425 */ 426 if (!check_driver_override(rdi, offsetof(struct ib_device, 427 modify_device), 428 rvt_modify_device)) 429 return -EOPNOTSUPP; 430 break; 431 432 case QUERY_PORT: 433 if (!check_driver_override(rdi, offsetof(struct ib_device, 434 query_port), 435 rvt_query_port)) 436 if (!rdi->driver_f.query_port_state) 437 return -EINVAL; 438 break; 439 440 case MODIFY_PORT: 441 if (!check_driver_override(rdi, offsetof(struct ib_device, 442 modify_port), 443 rvt_modify_port)) 444 if (!rdi->driver_f.cap_mask_chg || 445 !rdi->driver_f.shut_down_port) 446 return -EINVAL; 447 break; 448 449 case QUERY_PKEY: 450 check_driver_override(rdi, offsetof(struct ib_device, 451 query_pkey), 452 rvt_query_pkey); 453 break; 454 455 case QUERY_GID: 456 if (!check_driver_override(rdi, offsetof(struct ib_device, 457 query_gid), 458 rvt_query_gid)) 459 if (!rdi->driver_f.get_guid_be) 460 return -EINVAL; 461 break; 462 463 case ALLOC_UCONTEXT: 464 check_driver_override(rdi, offsetof(struct ib_device, 465 alloc_ucontext), 466 rvt_alloc_ucontext); 467 break; 468 469 case DEALLOC_UCONTEXT: 470 check_driver_override(rdi, offsetof(struct ib_device, 471 dealloc_ucontext), 472 rvt_dealloc_ucontext); 473 break; 474 475 case GET_PORT_IMMUTABLE: 476 check_driver_override(rdi, offsetof(struct ib_device, 477 get_port_immutable), 478 rvt_get_port_immutable); 479 break; 480 481 case CREATE_QP: 482 if (!check_driver_override(rdi, offsetof(struct ib_device, 483 create_qp), 484 rvt_create_qp)) 485 if (!rdi->driver_f.qp_priv_alloc || 486 !rdi->driver_f.qp_priv_free || 487 !rdi->driver_f.notify_qp_reset || 488 !rdi->driver_f.flush_qp_waiters || 489 !rdi->driver_f.stop_send_queue || 490 !rdi->driver_f.quiesce_qp) 491 return -EINVAL; 492 break; 493 494 case MODIFY_QP: 495 if (!check_driver_override(rdi, offsetof(struct ib_device, 496 modify_qp), 497 rvt_modify_qp)) 498 if (!rdi->driver_f.notify_qp_reset || 499 !rdi->driver_f.schedule_send || 500 !rdi->driver_f.get_pmtu_from_attr || 501 !rdi->driver_f.flush_qp_waiters || 502 !rdi->driver_f.stop_send_queue || 503 !rdi->driver_f.quiesce_qp || 504 !rdi->driver_f.notify_error_qp || 505 !rdi->driver_f.mtu_from_qp || 506 !rdi->driver_f.mtu_to_path_mtu) 507 return -EINVAL; 508 break; 509 510 case DESTROY_QP: 511 if (!check_driver_override(rdi, offsetof(struct ib_device, 512 destroy_qp), 513 rvt_destroy_qp)) 514 if (!rdi->driver_f.qp_priv_free || 515 !rdi->driver_f.notify_qp_reset || 516 !rdi->driver_f.flush_qp_waiters || 517 !rdi->driver_f.stop_send_queue || 518 !rdi->driver_f.quiesce_qp) 519 return -EINVAL; 520 break; 521 522 case QUERY_QP: 523 check_driver_override(rdi, offsetof(struct ib_device, 524 query_qp), 525 rvt_query_qp); 526 break; 527 528 case POST_SEND: 529 if (!check_driver_override(rdi, offsetof(struct ib_device, 530 post_send), 531 rvt_post_send)) 532 if (!rdi->driver_f.schedule_send || 533 !rdi->driver_f.do_send || 534 !rdi->post_parms) 535 return -EINVAL; 536 break; 537 538 case POST_RECV: 539 check_driver_override(rdi, offsetof(struct ib_device, 540 post_recv), 541 rvt_post_recv); 542 break; 543 case POST_SRQ_RECV: 544 check_driver_override(rdi, offsetof(struct ib_device, 545 post_srq_recv), 546 rvt_post_srq_recv); 547 break; 548 549 case CREATE_AH: 550 check_driver_override(rdi, offsetof(struct ib_device, 551 create_ah), 552 rvt_create_ah); 553 break; 554 555 case DESTROY_AH: 556 check_driver_override(rdi, offsetof(struct ib_device, 557 destroy_ah), 558 rvt_destroy_ah); 559 break; 560 561 case MODIFY_AH: 562 check_driver_override(rdi, offsetof(struct ib_device, 563 modify_ah), 564 rvt_modify_ah); 565 break; 566 567 case QUERY_AH: 568 check_driver_override(rdi, offsetof(struct ib_device, 569 query_ah), 570 rvt_query_ah); 571 break; 572 573 case CREATE_SRQ: 574 check_driver_override(rdi, offsetof(struct ib_device, 575 create_srq), 576 rvt_create_srq); 577 break; 578 579 case MODIFY_SRQ: 580 check_driver_override(rdi, offsetof(struct ib_device, 581 modify_srq), 582 rvt_modify_srq); 583 break; 584 585 case DESTROY_SRQ: 586 check_driver_override(rdi, offsetof(struct ib_device, 587 destroy_srq), 588 rvt_destroy_srq); 589 break; 590 591 case QUERY_SRQ: 592 check_driver_override(rdi, offsetof(struct ib_device, 593 query_srq), 594 rvt_query_srq); 595 break; 596 597 case ATTACH_MCAST: 598 check_driver_override(rdi, offsetof(struct ib_device, 599 attach_mcast), 600 rvt_attach_mcast); 601 break; 602 603 case DETACH_MCAST: 604 check_driver_override(rdi, offsetof(struct ib_device, 605 detach_mcast), 606 rvt_detach_mcast); 607 break; 608 609 case GET_DMA_MR: 610 check_driver_override(rdi, offsetof(struct ib_device, 611 get_dma_mr), 612 rvt_get_dma_mr); 613 break; 614 615 case REG_USER_MR: 616 check_driver_override(rdi, offsetof(struct ib_device, 617 reg_user_mr), 618 rvt_reg_user_mr); 619 break; 620 621 case DEREG_MR: 622 check_driver_override(rdi, offsetof(struct ib_device, 623 dereg_mr), 624 rvt_dereg_mr); 625 break; 626 627 case ALLOC_FMR: 628 check_driver_override(rdi, offsetof(struct ib_device, 629 alloc_fmr), 630 rvt_alloc_fmr); 631 break; 632 633 case ALLOC_MR: 634 check_driver_override(rdi, offsetof(struct ib_device, 635 alloc_mr), 636 rvt_alloc_mr); 637 break; 638 639 case MAP_MR_SG: 640 check_driver_override(rdi, offsetof(struct ib_device, 641 map_mr_sg), 642 rvt_map_mr_sg); 643 break; 644 645 case MAP_PHYS_FMR: 646 check_driver_override(rdi, offsetof(struct ib_device, 647 map_phys_fmr), 648 rvt_map_phys_fmr); 649 break; 650 651 case UNMAP_FMR: 652 check_driver_override(rdi, offsetof(struct ib_device, 653 unmap_fmr), 654 rvt_unmap_fmr); 655 break; 656 657 case DEALLOC_FMR: 658 check_driver_override(rdi, offsetof(struct ib_device, 659 dealloc_fmr), 660 rvt_dealloc_fmr); 661 break; 662 663 case MMAP: 664 check_driver_override(rdi, offsetof(struct ib_device, 665 mmap), 666 rvt_mmap); 667 break; 668 669 case CREATE_CQ: 670 check_driver_override(rdi, offsetof(struct ib_device, 671 create_cq), 672 rvt_create_cq); 673 break; 674 675 case DESTROY_CQ: 676 check_driver_override(rdi, offsetof(struct ib_device, 677 destroy_cq), 678 rvt_destroy_cq); 679 break; 680 681 case POLL_CQ: 682 check_driver_override(rdi, offsetof(struct ib_device, 683 poll_cq), 684 rvt_poll_cq); 685 break; 686 687 case REQ_NOTFIY_CQ: 688 check_driver_override(rdi, offsetof(struct ib_device, 689 req_notify_cq), 690 rvt_req_notify_cq); 691 break; 692 693 case RESIZE_CQ: 694 check_driver_override(rdi, offsetof(struct ib_device, 695 resize_cq), 696 rvt_resize_cq); 697 break; 698 699 case ALLOC_PD: 700 check_driver_override(rdi, offsetof(struct ib_device, 701 alloc_pd), 702 rvt_alloc_pd); 703 break; 704 705 case DEALLOC_PD: 706 check_driver_override(rdi, offsetof(struct ib_device, 707 dealloc_pd), 708 rvt_dealloc_pd); 709 break; 710 711 default: 712 return -EINVAL; 713 } 714 715 return 0; 716 } 717 718 /** 719 * rvt_register_device - register a driver 720 * @rdi: main dev structure for all of rdmavt operations 721 * 722 * It is up to drivers to allocate the rdi and fill in the appropriate 723 * information. 724 * 725 * Return: 0 on success otherwise an errno. 726 */ 727 int rvt_register_device(struct rvt_dev_info *rdi) 728 { 729 int ret = 0, i; 730 731 if (!rdi) 732 return -EINVAL; 733 734 /* 735 * Check to ensure drivers have setup the required helpers for the verbs 736 * they want rdmavt to handle 737 */ 738 for (i = 0; i < _VERB_IDX_MAX; i++) 739 if (check_support(rdi, i)) { 740 pr_err("Driver support req not met at %d\n", i); 741 return -EINVAL; 742 } 743 744 745 /* Once we get past here we can use rvt_pr macros and tracepoints */ 746 trace_rvt_dbg(rdi, "Driver attempting registration"); 747 rvt_mmap_init(rdi); 748 749 /* Queue Pairs */ 750 ret = rvt_driver_qp_init(rdi); 751 if (ret) { 752 pr_err("Error in driver QP init.\n"); 753 return -EINVAL; 754 } 755 756 /* Address Handle */ 757 spin_lock_init(&rdi->n_ahs_lock); 758 rdi->n_ahs_allocated = 0; 759 760 /* Shared Receive Queue */ 761 rvt_driver_srq_init(rdi); 762 763 /* Multicast */ 764 rvt_driver_mcast_init(rdi); 765 766 /* Mem Region */ 767 ret = rvt_driver_mr_init(rdi); 768 if (ret) { 769 pr_err("Error in driver MR init.\n"); 770 goto bail_no_mr; 771 } 772 773 /* Completion queues */ 774 ret = rvt_driver_cq_init(rdi); 775 if (ret) { 776 pr_err("Error in driver CQ init.\n"); 777 goto bail_mr; 778 } 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 rdi->ibdev.num_comp_vectors = 1; 827 828 /* 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_cq; 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_cq: 841 rvt_cq_exit(rdi); 842 843 bail_mr: 844 rvt_mr_exit(rdi); 845 846 bail_no_mr: 847 rvt_qp_exit(rdi); 848 849 return ret; 850 } 851 EXPORT_SYMBOL(rvt_register_device); 852 853 /** 854 * rvt_unregister_device - remove a driver 855 * @rdi: rvt dev struct 856 */ 857 void rvt_unregister_device(struct rvt_dev_info *rdi) 858 { 859 trace_rvt_dbg(rdi, "Driver is unregistering."); 860 if (!rdi) 861 return; 862 863 rvt_free_mad_agents(rdi); 864 865 ib_unregister_device(&rdi->ibdev); 866 rvt_cq_exit(rdi); 867 rvt_mr_exit(rdi); 868 rvt_qp_exit(rdi); 869 } 870 EXPORT_SYMBOL(rvt_unregister_device); 871 872 /** 873 * rvt_init_port - init internal data for driver port 874 * @rdi: rvt dev strut 875 * @port: rvt port 876 * @port_index: 0 based index of ports, different from IB core port num 877 * 878 * Keep track of a list of ports. No need to have a detach port. 879 * They persist until the driver goes away. 880 * 881 * Return: always 0 882 */ 883 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, 884 int port_index, u16 *pkey_table) 885 { 886 887 rdi->ports[port_index] = port; 888 rdi->ports[port_index]->pkey_table = pkey_table; 889 890 return 0; 891 } 892 EXPORT_SYMBOL(rvt_init_port); 893