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 /* props being zeroed by the caller, avoid zeroing it here */ 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 if (port_modify_mask & IB_PORT_OPA_MASK_CHG) { 206 rvp->port_cap3_flags |= props->set_port_cap_mask; 207 rvp->port_cap3_flags &= ~props->clr_port_cap_mask; 208 } else { 209 rvp->port_cap_flags |= props->set_port_cap_mask; 210 rvp->port_cap_flags &= ~props->clr_port_cap_mask; 211 } 212 213 if (props->set_port_cap_mask || props->clr_port_cap_mask) 214 rdi->driver_f.cap_mask_chg(rdi, port_num); 215 if (port_modify_mask & IB_PORT_SHUTDOWN) 216 ret = rdi->driver_f.shut_down_port(rdi, port_num); 217 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR) 218 rvp->qkey_violations = 0; 219 220 return ret; 221 } 222 223 /** 224 * rvt_query_pkey - Return a pkey from the table at a given index 225 * @ibdev: Verbs IB dev 226 * @port_num: Port number, 1 based from ib core 227 * @index: Index into pkey table 228 * @pkey: returned pkey from the port pkey table 229 * 230 * Return: 0 on failure pkey otherwise 231 */ 232 static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index, 233 u16 *pkey) 234 { 235 /* 236 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to 237 * date. This function will just return that value. There is no need to 238 * lock, if a stale value is read and sent to the user so be it there is 239 * no way to protect against that anyway. 240 */ 241 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 242 int port_index; 243 244 port_index = ibport_num_to_idx(ibdev, port_num); 245 if (port_index < 0) 246 return -EINVAL; 247 248 if (index >= rvt_get_npkeys(rdi)) 249 return -EINVAL; 250 251 *pkey = rvt_get_pkey(rdi, port_index, index); 252 return 0; 253 } 254 255 /** 256 * rvt_query_gid - Return a gid from the table 257 * @ibdev: Verbs IB dev 258 * @port_num: Port number, 1 based from ib core 259 * @guid_index: Index in table 260 * @gid: Gid to return 261 * 262 * Return: 0 on success 263 */ 264 static int rvt_query_gid(struct ib_device *ibdev, u8 port_num, 265 int guid_index, union ib_gid *gid) 266 { 267 struct rvt_dev_info *rdi; 268 struct rvt_ibport *rvp; 269 int port_index; 270 271 /* 272 * Driver is responsible for updating the guid table. Which will be used 273 * to craft the return value. This will work similar to how query_pkey() 274 * is being done. 275 */ 276 port_index = ibport_num_to_idx(ibdev, port_num); 277 if (port_index < 0) 278 return -EINVAL; 279 280 rdi = ib_to_rvt(ibdev); 281 rvp = rdi->ports[port_index]; 282 283 gid->global.subnet_prefix = rvp->gid_prefix; 284 285 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index, 286 &gid->global.interface_id); 287 } 288 289 struct rvt_ucontext { 290 struct ib_ucontext ibucontext; 291 }; 292 293 static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext 294 *ibucontext) 295 { 296 return container_of(ibucontext, struct rvt_ucontext, ibucontext); 297 } 298 299 /** 300 * rvt_alloc_ucontext - Allocate a user context 301 * @ibdev: Verbs IB dev 302 * @udata: User data allocated 303 */ 304 static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev, 305 struct ib_udata *udata) 306 { 307 struct rvt_ucontext *context; 308 309 context = kmalloc(sizeof(*context), GFP_KERNEL); 310 if (!context) 311 return ERR_PTR(-ENOMEM); 312 return &context->ibucontext; 313 } 314 315 /** 316 *rvt_dealloc_ucontext - Free a user context 317 *@context - Free this 318 */ 319 static int rvt_dealloc_ucontext(struct ib_ucontext *context) 320 { 321 kfree(to_iucontext(context)); 322 return 0; 323 } 324 325 static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num, 326 struct ib_port_immutable *immutable) 327 { 328 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 329 struct ib_port_attr attr; 330 int err, port_index; 331 332 port_index = ibport_num_to_idx(ibdev, port_num); 333 if (port_index < 0) 334 return -EINVAL; 335 336 immutable->core_cap_flags = rdi->dparms.core_cap_flags; 337 338 err = ib_query_port(ibdev, port_num, &attr); 339 if (err) 340 return err; 341 342 immutable->pkey_tbl_len = attr.pkey_tbl_len; 343 immutable->gid_tbl_len = attr.gid_tbl_len; 344 immutable->max_mad_size = rdi->dparms.max_mad_size; 345 346 return 0; 347 } 348 349 enum { 350 MISC, 351 QUERY_DEVICE, 352 MODIFY_DEVICE, 353 QUERY_PORT, 354 MODIFY_PORT, 355 QUERY_PKEY, 356 QUERY_GID, 357 ALLOC_UCONTEXT, 358 DEALLOC_UCONTEXT, 359 GET_PORT_IMMUTABLE, 360 CREATE_QP, 361 MODIFY_QP, 362 DESTROY_QP, 363 QUERY_QP, 364 POST_SEND, 365 POST_RECV, 366 POST_SRQ_RECV, 367 CREATE_AH, 368 DESTROY_AH, 369 MODIFY_AH, 370 QUERY_AH, 371 CREATE_SRQ, 372 MODIFY_SRQ, 373 DESTROY_SRQ, 374 QUERY_SRQ, 375 ATTACH_MCAST, 376 DETACH_MCAST, 377 GET_DMA_MR, 378 REG_USER_MR, 379 DEREG_MR, 380 ALLOC_MR, 381 MAP_MR_SG, 382 ALLOC_FMR, 383 MAP_PHYS_FMR, 384 UNMAP_FMR, 385 DEALLOC_FMR, 386 MMAP, 387 CREATE_CQ, 388 DESTROY_CQ, 389 POLL_CQ, 390 REQ_NOTFIY_CQ, 391 RESIZE_CQ, 392 ALLOC_PD, 393 DEALLOC_PD, 394 _VERB_IDX_MAX /* Must always be last! */ 395 }; 396 397 static inline int check_driver_override(struct rvt_dev_info *rdi, 398 size_t offset, void *func) 399 { 400 if (!*(void **)((void *)&rdi->ibdev + offset)) { 401 *(void **)((void *)&rdi->ibdev + offset) = func; 402 return 0; 403 } 404 405 return 1; 406 } 407 408 static noinline int check_support(struct rvt_dev_info *rdi, int verb) 409 { 410 switch (verb) { 411 case MISC: 412 /* 413 * These functions are not part of verbs specifically but are 414 * required for rdmavt to function. 415 */ 416 if ((!rdi->driver_f.port_callback) || 417 (!rdi->driver_f.get_pci_dev)) 418 return -EINVAL; 419 break; 420 421 case QUERY_DEVICE: 422 check_driver_override(rdi, offsetof(struct ib_device, 423 query_device), 424 rvt_query_device); 425 break; 426 427 case MODIFY_DEVICE: 428 /* 429 * rdmavt does not support modify device currently drivers must 430 * provide. 431 */ 432 if (!check_driver_override(rdi, offsetof(struct ib_device, 433 modify_device), 434 rvt_modify_device)) 435 return -EOPNOTSUPP; 436 break; 437 438 case QUERY_PORT: 439 if (!check_driver_override(rdi, offsetof(struct ib_device, 440 query_port), 441 rvt_query_port)) 442 if (!rdi->driver_f.query_port_state) 443 return -EINVAL; 444 break; 445 446 case MODIFY_PORT: 447 if (!check_driver_override(rdi, offsetof(struct ib_device, 448 modify_port), 449 rvt_modify_port)) 450 if (!rdi->driver_f.cap_mask_chg || 451 !rdi->driver_f.shut_down_port) 452 return -EINVAL; 453 break; 454 455 case QUERY_PKEY: 456 check_driver_override(rdi, offsetof(struct ib_device, 457 query_pkey), 458 rvt_query_pkey); 459 break; 460 461 case QUERY_GID: 462 if (!check_driver_override(rdi, offsetof(struct ib_device, 463 query_gid), 464 rvt_query_gid)) 465 if (!rdi->driver_f.get_guid_be) 466 return -EINVAL; 467 break; 468 469 case ALLOC_UCONTEXT: 470 check_driver_override(rdi, offsetof(struct ib_device, 471 alloc_ucontext), 472 rvt_alloc_ucontext); 473 break; 474 475 case DEALLOC_UCONTEXT: 476 check_driver_override(rdi, offsetof(struct ib_device, 477 dealloc_ucontext), 478 rvt_dealloc_ucontext); 479 break; 480 481 case GET_PORT_IMMUTABLE: 482 check_driver_override(rdi, offsetof(struct ib_device, 483 get_port_immutable), 484 rvt_get_port_immutable); 485 break; 486 487 case CREATE_QP: 488 if (!check_driver_override(rdi, offsetof(struct ib_device, 489 create_qp), 490 rvt_create_qp)) 491 if (!rdi->driver_f.qp_priv_alloc || 492 !rdi->driver_f.qp_priv_free || 493 !rdi->driver_f.notify_qp_reset || 494 !rdi->driver_f.flush_qp_waiters || 495 !rdi->driver_f.stop_send_queue || 496 !rdi->driver_f.quiesce_qp) 497 return -EINVAL; 498 break; 499 500 case MODIFY_QP: 501 if (!check_driver_override(rdi, offsetof(struct ib_device, 502 modify_qp), 503 rvt_modify_qp)) 504 if (!rdi->driver_f.notify_qp_reset || 505 !rdi->driver_f.schedule_send || 506 !rdi->driver_f.get_pmtu_from_attr || 507 !rdi->driver_f.flush_qp_waiters || 508 !rdi->driver_f.stop_send_queue || 509 !rdi->driver_f.quiesce_qp || 510 !rdi->driver_f.notify_error_qp || 511 !rdi->driver_f.mtu_from_qp || 512 !rdi->driver_f.mtu_to_path_mtu) 513 return -EINVAL; 514 break; 515 516 case DESTROY_QP: 517 if (!check_driver_override(rdi, offsetof(struct ib_device, 518 destroy_qp), 519 rvt_destroy_qp)) 520 if (!rdi->driver_f.qp_priv_free || 521 !rdi->driver_f.notify_qp_reset || 522 !rdi->driver_f.flush_qp_waiters || 523 !rdi->driver_f.stop_send_queue || 524 !rdi->driver_f.quiesce_qp) 525 return -EINVAL; 526 break; 527 528 case QUERY_QP: 529 check_driver_override(rdi, offsetof(struct ib_device, 530 query_qp), 531 rvt_query_qp); 532 break; 533 534 case POST_SEND: 535 if (!check_driver_override(rdi, offsetof(struct ib_device, 536 post_send), 537 rvt_post_send)) 538 if (!rdi->driver_f.schedule_send || 539 !rdi->driver_f.do_send || 540 !rdi->post_parms) 541 return -EINVAL; 542 break; 543 544 case POST_RECV: 545 check_driver_override(rdi, offsetof(struct ib_device, 546 post_recv), 547 rvt_post_recv); 548 break; 549 case POST_SRQ_RECV: 550 check_driver_override(rdi, offsetof(struct ib_device, 551 post_srq_recv), 552 rvt_post_srq_recv); 553 break; 554 555 case CREATE_AH: 556 check_driver_override(rdi, offsetof(struct ib_device, 557 create_ah), 558 rvt_create_ah); 559 break; 560 561 case DESTROY_AH: 562 check_driver_override(rdi, offsetof(struct ib_device, 563 destroy_ah), 564 rvt_destroy_ah); 565 break; 566 567 case MODIFY_AH: 568 check_driver_override(rdi, offsetof(struct ib_device, 569 modify_ah), 570 rvt_modify_ah); 571 break; 572 573 case QUERY_AH: 574 check_driver_override(rdi, offsetof(struct ib_device, 575 query_ah), 576 rvt_query_ah); 577 break; 578 579 case CREATE_SRQ: 580 check_driver_override(rdi, offsetof(struct ib_device, 581 create_srq), 582 rvt_create_srq); 583 break; 584 585 case MODIFY_SRQ: 586 check_driver_override(rdi, offsetof(struct ib_device, 587 modify_srq), 588 rvt_modify_srq); 589 break; 590 591 case DESTROY_SRQ: 592 check_driver_override(rdi, offsetof(struct ib_device, 593 destroy_srq), 594 rvt_destroy_srq); 595 break; 596 597 case QUERY_SRQ: 598 check_driver_override(rdi, offsetof(struct ib_device, 599 query_srq), 600 rvt_query_srq); 601 break; 602 603 case ATTACH_MCAST: 604 check_driver_override(rdi, offsetof(struct ib_device, 605 attach_mcast), 606 rvt_attach_mcast); 607 break; 608 609 case DETACH_MCAST: 610 check_driver_override(rdi, offsetof(struct ib_device, 611 detach_mcast), 612 rvt_detach_mcast); 613 break; 614 615 case GET_DMA_MR: 616 check_driver_override(rdi, offsetof(struct ib_device, 617 get_dma_mr), 618 rvt_get_dma_mr); 619 break; 620 621 case REG_USER_MR: 622 check_driver_override(rdi, offsetof(struct ib_device, 623 reg_user_mr), 624 rvt_reg_user_mr); 625 break; 626 627 case DEREG_MR: 628 check_driver_override(rdi, offsetof(struct ib_device, 629 dereg_mr), 630 rvt_dereg_mr); 631 break; 632 633 case ALLOC_FMR: 634 check_driver_override(rdi, offsetof(struct ib_device, 635 alloc_fmr), 636 rvt_alloc_fmr); 637 break; 638 639 case ALLOC_MR: 640 check_driver_override(rdi, offsetof(struct ib_device, 641 alloc_mr), 642 rvt_alloc_mr); 643 break; 644 645 case MAP_MR_SG: 646 check_driver_override(rdi, offsetof(struct ib_device, 647 map_mr_sg), 648 rvt_map_mr_sg); 649 break; 650 651 case MAP_PHYS_FMR: 652 check_driver_override(rdi, offsetof(struct ib_device, 653 map_phys_fmr), 654 rvt_map_phys_fmr); 655 break; 656 657 case UNMAP_FMR: 658 check_driver_override(rdi, offsetof(struct ib_device, 659 unmap_fmr), 660 rvt_unmap_fmr); 661 break; 662 663 case DEALLOC_FMR: 664 check_driver_override(rdi, offsetof(struct ib_device, 665 dealloc_fmr), 666 rvt_dealloc_fmr); 667 break; 668 669 case MMAP: 670 check_driver_override(rdi, offsetof(struct ib_device, 671 mmap), 672 rvt_mmap); 673 break; 674 675 case CREATE_CQ: 676 check_driver_override(rdi, offsetof(struct ib_device, 677 create_cq), 678 rvt_create_cq); 679 break; 680 681 case DESTROY_CQ: 682 check_driver_override(rdi, offsetof(struct ib_device, 683 destroy_cq), 684 rvt_destroy_cq); 685 break; 686 687 case POLL_CQ: 688 check_driver_override(rdi, offsetof(struct ib_device, 689 poll_cq), 690 rvt_poll_cq); 691 break; 692 693 case REQ_NOTFIY_CQ: 694 check_driver_override(rdi, offsetof(struct ib_device, 695 req_notify_cq), 696 rvt_req_notify_cq); 697 break; 698 699 case RESIZE_CQ: 700 check_driver_override(rdi, offsetof(struct ib_device, 701 resize_cq), 702 rvt_resize_cq); 703 break; 704 705 case ALLOC_PD: 706 check_driver_override(rdi, offsetof(struct ib_device, 707 alloc_pd), 708 rvt_alloc_pd); 709 break; 710 711 case DEALLOC_PD: 712 check_driver_override(rdi, offsetof(struct ib_device, 713 dealloc_pd), 714 rvt_dealloc_pd); 715 break; 716 717 default: 718 return -EINVAL; 719 } 720 721 return 0; 722 } 723 724 /** 725 * rvt_register_device - register a driver 726 * @rdi: main dev structure for all of rdmavt operations 727 * 728 * It is up to drivers to allocate the rdi and fill in the appropriate 729 * information. 730 * 731 * Return: 0 on success otherwise an errno. 732 */ 733 int rvt_register_device(struct rvt_dev_info *rdi) 734 { 735 int ret = 0, i; 736 737 if (!rdi) 738 return -EINVAL; 739 740 /* 741 * Check to ensure drivers have setup the required helpers for the verbs 742 * they want rdmavt to handle 743 */ 744 for (i = 0; i < _VERB_IDX_MAX; i++) 745 if (check_support(rdi, i)) { 746 pr_err("Driver support req not met at %d\n", i); 747 return -EINVAL; 748 } 749 750 751 /* Once we get past here we can use rvt_pr macros and tracepoints */ 752 trace_rvt_dbg(rdi, "Driver attempting registration"); 753 rvt_mmap_init(rdi); 754 755 /* Queue Pairs */ 756 ret = rvt_driver_qp_init(rdi); 757 if (ret) { 758 pr_err("Error in driver QP init.\n"); 759 return -EINVAL; 760 } 761 762 /* Address Handle */ 763 spin_lock_init(&rdi->n_ahs_lock); 764 rdi->n_ahs_allocated = 0; 765 766 /* Shared Receive Queue */ 767 rvt_driver_srq_init(rdi); 768 769 /* Multicast */ 770 rvt_driver_mcast_init(rdi); 771 772 /* Mem Region */ 773 ret = rvt_driver_mr_init(rdi); 774 if (ret) { 775 pr_err("Error in driver MR init.\n"); 776 goto bail_no_mr; 777 } 778 779 /* Completion queues */ 780 ret = rvt_driver_cq_init(rdi); 781 if (ret) { 782 pr_err("Error in driver CQ init.\n"); 783 goto bail_mr; 784 } 785 786 /* DMA Operations */ 787 rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops; 788 789 /* Protection Domain */ 790 spin_lock_init(&rdi->n_pds_lock); 791 rdi->n_pds_allocated = 0; 792 793 /* 794 * There are some things which could be set by underlying drivers but 795 * really should be up to rdmavt to set. For instance drivers can't know 796 * exactly which functions rdmavt supports, nor do they know the ABI 797 * version, so we do all of this sort of stuff here. 798 */ 799 rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION; 800 rdi->ibdev.uverbs_cmd_mask = 801 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 802 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 803 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 804 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 805 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 806 (1ull << IB_USER_VERBS_CMD_CREATE_AH) | 807 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) | 808 (1ull << IB_USER_VERBS_CMD_QUERY_AH) | 809 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) | 810 (1ull << IB_USER_VERBS_CMD_REG_MR) | 811 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 812 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 813 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 814 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | 815 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 816 (1ull << IB_USER_VERBS_CMD_POLL_CQ) | 817 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | 818 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 819 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 820 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 821 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 822 (1ull << IB_USER_VERBS_CMD_POST_SEND) | 823 (1ull << IB_USER_VERBS_CMD_POST_RECV) | 824 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 825 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 826 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | 827 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | 828 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | 829 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | 830 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV); 831 rdi->ibdev.node_type = RDMA_NODE_IB_CA; 832 rdi->ibdev.num_comp_vectors = 1; 833 834 /* We are now good to announce we exist */ 835 ret = ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback); 836 if (ret) { 837 rvt_pr_err(rdi, "Failed to register driver with ib core.\n"); 838 goto bail_cq; 839 } 840 841 rvt_create_mad_agents(rdi); 842 843 rvt_pr_info(rdi, "Registration with rdmavt done.\n"); 844 return ret; 845 846 bail_cq: 847 rvt_cq_exit(rdi); 848 849 bail_mr: 850 rvt_mr_exit(rdi); 851 852 bail_no_mr: 853 rvt_qp_exit(rdi); 854 855 return ret; 856 } 857 EXPORT_SYMBOL(rvt_register_device); 858 859 /** 860 * rvt_unregister_device - remove a driver 861 * @rdi: rvt dev struct 862 */ 863 void rvt_unregister_device(struct rvt_dev_info *rdi) 864 { 865 trace_rvt_dbg(rdi, "Driver is unregistering."); 866 if (!rdi) 867 return; 868 869 rvt_free_mad_agents(rdi); 870 871 ib_unregister_device(&rdi->ibdev); 872 rvt_cq_exit(rdi); 873 rvt_mr_exit(rdi); 874 rvt_qp_exit(rdi); 875 } 876 EXPORT_SYMBOL(rvt_unregister_device); 877 878 /** 879 * rvt_init_port - init internal data for driver port 880 * @rdi: rvt dev strut 881 * @port: rvt port 882 * @port_index: 0 based index of ports, different from IB core port num 883 * 884 * Keep track of a list of ports. No need to have a detach port. 885 * They persist until the driver goes away. 886 * 887 * Return: always 0 888 */ 889 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, 890 int port_index, u16 *pkey_table) 891 { 892 893 rdi->ports[port_index] = port; 894 rdi->ports[port_index]->pkey_table = pkey_table; 895 896 return 0; 897 } 898 EXPORT_SYMBOL(rvt_init_port); 899