1 /* 2 * Copyright(c) 2016 - 2018 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47 48 #include <linux/module.h> 49 #include <linux/kernel.h> 50 #include <linux/dma-mapping.h> 51 #include "vt.h" 52 #include "cq.h" 53 #include "trace.h" 54 55 #define RVT_UVERBS_ABI_VERSION 2 56 57 MODULE_LICENSE("Dual BSD/GPL"); 58 MODULE_DESCRIPTION("RDMA Verbs Transport Library"); 59 60 static int rvt_init(void) 61 { 62 int ret = rvt_driver_cq_init(); 63 64 if (ret) 65 pr_err("Error in driver CQ init.\n"); 66 67 return ret; 68 } 69 module_init(rvt_init); 70 71 static void rvt_cleanup(void) 72 { 73 rvt_cq_exit(); 74 } 75 module_exit(rvt_cleanup); 76 77 /** 78 * rvt_alloc_device - allocate rdi 79 * @size: how big of a structure to allocate 80 * @nports: number of ports to allocate array slots for 81 * 82 * Use IB core device alloc to allocate space for the rdi which is assumed to be 83 * inside of the ib_device. Any extra space that drivers require should be 84 * included in size. 85 * 86 * We also allocate a port array based on the number of ports. 87 * 88 * Return: pointer to allocated rdi 89 */ 90 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports) 91 { 92 struct rvt_dev_info *rdi; 93 94 rdi = (struct rvt_dev_info *)ib_alloc_device(size); 95 if (!rdi) 96 return rdi; 97 98 rdi->ports = kcalloc(nports, 99 sizeof(struct rvt_ibport **), 100 GFP_KERNEL); 101 if (!rdi->ports) 102 ib_dealloc_device(&rdi->ibdev); 103 104 return rdi; 105 } 106 EXPORT_SYMBOL(rvt_alloc_device); 107 108 /** 109 * rvt_dealloc_device - deallocate rdi 110 * @rdi: structure to free 111 * 112 * Free a structure allocated with rvt_alloc_device() 113 */ 114 void rvt_dealloc_device(struct rvt_dev_info *rdi) 115 { 116 kfree(rdi->ports); 117 ib_dealloc_device(&rdi->ibdev); 118 } 119 EXPORT_SYMBOL(rvt_dealloc_device); 120 121 static int rvt_query_device(struct ib_device *ibdev, 122 struct ib_device_attr *props, 123 struct ib_udata *uhw) 124 { 125 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 126 127 if (uhw->inlen || uhw->outlen) 128 return -EINVAL; 129 /* 130 * Return rvt_dev_info.dparms.props contents 131 */ 132 *props = rdi->dparms.props; 133 return 0; 134 } 135 136 static int rvt_modify_device(struct ib_device *device, 137 int device_modify_mask, 138 struct ib_device_modify *device_modify) 139 { 140 /* 141 * There is currently no need to supply this based on qib and hfi1. 142 * Future drivers may need to implement this though. 143 */ 144 145 return -EOPNOTSUPP; 146 } 147 148 /** 149 * rvt_query_port: Passes the query port call to the driver 150 * @ibdev: Verbs IB dev 151 * @port_num: port number, 1 based from ib core 152 * @props: structure to hold returned properties 153 * 154 * Return: 0 on success 155 */ 156 static int rvt_query_port(struct ib_device *ibdev, u8 port_num, 157 struct ib_port_attr *props) 158 { 159 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 160 struct rvt_ibport *rvp; 161 int port_index = ibport_num_to_idx(ibdev, port_num); 162 163 if (port_index < 0) 164 return -EINVAL; 165 166 rvp = rdi->ports[port_index]; 167 /* props being zeroed by the caller, avoid zeroing it here */ 168 props->sm_lid = rvp->sm_lid; 169 props->sm_sl = rvp->sm_sl; 170 props->port_cap_flags = rvp->port_cap_flags; 171 props->max_msg_sz = 0x80000000; 172 props->pkey_tbl_len = rvt_get_npkeys(rdi); 173 props->bad_pkey_cntr = rvp->pkey_violations; 174 props->qkey_viol_cntr = rvp->qkey_violations; 175 props->subnet_timeout = rvp->subnet_timeout; 176 props->init_type_reply = 0; 177 178 /* Populate the remaining ib_port_attr elements */ 179 return rdi->driver_f.query_port_state(rdi, port_num, props); 180 } 181 182 /** 183 * rvt_modify_port 184 * @ibdev: Verbs IB dev 185 * @port_num: Port number, 1 based from ib core 186 * @port_modify_mask: How to change the port 187 * @props: Structure to fill in 188 * 189 * Return: 0 on success 190 */ 191 static int rvt_modify_port(struct ib_device *ibdev, u8 port_num, 192 int port_modify_mask, struct ib_port_modify *props) 193 { 194 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 195 struct rvt_ibport *rvp; 196 int ret = 0; 197 int port_index = ibport_num_to_idx(ibdev, port_num); 198 199 if (port_index < 0) 200 return -EINVAL; 201 202 rvp = rdi->ports[port_index]; 203 if (port_modify_mask & IB_PORT_OPA_MASK_CHG) { 204 rvp->port_cap3_flags |= props->set_port_cap_mask; 205 rvp->port_cap3_flags &= ~props->clr_port_cap_mask; 206 } else { 207 rvp->port_cap_flags |= props->set_port_cap_mask; 208 rvp->port_cap_flags &= ~props->clr_port_cap_mask; 209 } 210 211 if (props->set_port_cap_mask || props->clr_port_cap_mask) 212 rdi->driver_f.cap_mask_chg(rdi, port_num); 213 if (port_modify_mask & IB_PORT_SHUTDOWN) 214 ret = rdi->driver_f.shut_down_port(rdi, port_num); 215 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR) 216 rvp->qkey_violations = 0; 217 218 return ret; 219 } 220 221 /** 222 * rvt_query_pkey - Return a pkey from the table at a given index 223 * @ibdev: Verbs IB dev 224 * @port_num: Port number, 1 based from ib core 225 * @index: Index into pkey table 226 * @pkey: returned pkey from the port pkey table 227 * 228 * Return: 0 on failure pkey otherwise 229 */ 230 static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index, 231 u16 *pkey) 232 { 233 /* 234 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to 235 * date. This function will just return that value. There is no need to 236 * lock, if a stale value is read and sent to the user so be it there is 237 * no way to protect against that anyway. 238 */ 239 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 240 int port_index; 241 242 port_index = ibport_num_to_idx(ibdev, port_num); 243 if (port_index < 0) 244 return -EINVAL; 245 246 if (index >= rvt_get_npkeys(rdi)) 247 return -EINVAL; 248 249 *pkey = rvt_get_pkey(rdi, port_index, index); 250 return 0; 251 } 252 253 /** 254 * rvt_query_gid - Return a gid from the table 255 * @ibdev: Verbs IB dev 256 * @port_num: Port number, 1 based from ib core 257 * @guid_index: Index in table 258 * @gid: Gid to return 259 * 260 * Return: 0 on success 261 */ 262 static int rvt_query_gid(struct ib_device *ibdev, u8 port_num, 263 int guid_index, union ib_gid *gid) 264 { 265 struct rvt_dev_info *rdi; 266 struct rvt_ibport *rvp; 267 int port_index; 268 269 /* 270 * Driver is responsible for updating the guid table. Which will be used 271 * to craft the return value. This will work similar to how query_pkey() 272 * is being done. 273 */ 274 port_index = ibport_num_to_idx(ibdev, port_num); 275 if (port_index < 0) 276 return -EINVAL; 277 278 rdi = ib_to_rvt(ibdev); 279 rvp = rdi->ports[port_index]; 280 281 gid->global.subnet_prefix = rvp->gid_prefix; 282 283 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index, 284 &gid->global.interface_id); 285 } 286 287 struct rvt_ucontext { 288 struct ib_ucontext ibucontext; 289 }; 290 291 static inline struct rvt_ucontext *to_iucontext(struct ib_ucontext 292 *ibucontext) 293 { 294 return container_of(ibucontext, struct rvt_ucontext, ibucontext); 295 } 296 297 /** 298 * rvt_alloc_ucontext - Allocate a user context 299 * @ibdev: Verbs IB dev 300 * @udata: User data allocated 301 */ 302 static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev, 303 struct ib_udata *udata) 304 { 305 struct rvt_ucontext *context; 306 307 context = kmalloc(sizeof(*context), GFP_KERNEL); 308 if (!context) 309 return ERR_PTR(-ENOMEM); 310 return &context->ibucontext; 311 } 312 313 /** 314 *rvt_dealloc_ucontext - Free a user context 315 *@context - Free this 316 */ 317 static int rvt_dealloc_ucontext(struct ib_ucontext *context) 318 { 319 kfree(to_iucontext(context)); 320 return 0; 321 } 322 323 static int rvt_get_port_immutable(struct ib_device *ibdev, u8 port_num, 324 struct ib_port_immutable *immutable) 325 { 326 struct rvt_dev_info *rdi = ib_to_rvt(ibdev); 327 struct ib_port_attr attr; 328 int err, port_index; 329 330 port_index = ibport_num_to_idx(ibdev, port_num); 331 if (port_index < 0) 332 return -EINVAL; 333 334 immutable->core_cap_flags = rdi->dparms.core_cap_flags; 335 336 err = ib_query_port(ibdev, port_num, &attr); 337 if (err) 338 return err; 339 340 immutable->pkey_tbl_len = attr.pkey_tbl_len; 341 immutable->gid_tbl_len = attr.gid_tbl_len; 342 immutable->max_mad_size = rdi->dparms.max_mad_size; 343 344 return 0; 345 } 346 347 enum { 348 MISC, 349 QUERY_DEVICE, 350 MODIFY_DEVICE, 351 QUERY_PORT, 352 MODIFY_PORT, 353 QUERY_PKEY, 354 QUERY_GID, 355 ALLOC_UCONTEXT, 356 DEALLOC_UCONTEXT, 357 GET_PORT_IMMUTABLE, 358 CREATE_QP, 359 MODIFY_QP, 360 DESTROY_QP, 361 QUERY_QP, 362 POST_SEND, 363 POST_RECV, 364 POST_SRQ_RECV, 365 CREATE_AH, 366 DESTROY_AH, 367 MODIFY_AH, 368 QUERY_AH, 369 CREATE_SRQ, 370 MODIFY_SRQ, 371 DESTROY_SRQ, 372 QUERY_SRQ, 373 ATTACH_MCAST, 374 DETACH_MCAST, 375 GET_DMA_MR, 376 REG_USER_MR, 377 DEREG_MR, 378 ALLOC_MR, 379 MAP_MR_SG, 380 ALLOC_FMR, 381 MAP_PHYS_FMR, 382 UNMAP_FMR, 383 DEALLOC_FMR, 384 MMAP, 385 CREATE_CQ, 386 DESTROY_CQ, 387 POLL_CQ, 388 REQ_NOTFIY_CQ, 389 RESIZE_CQ, 390 ALLOC_PD, 391 DEALLOC_PD, 392 _VERB_IDX_MAX /* Must always be last! */ 393 }; 394 395 static inline int check_driver_override(struct rvt_dev_info *rdi, 396 size_t offset, void *func) 397 { 398 if (!*(void **)((void *)&rdi->ibdev + offset)) { 399 *(void **)((void *)&rdi->ibdev + offset) = func; 400 return 0; 401 } 402 403 return 1; 404 } 405 406 static noinline int check_support(struct rvt_dev_info *rdi, int verb) 407 { 408 switch (verb) { 409 case MISC: 410 /* 411 * These functions are not part of verbs specifically but are 412 * required for rdmavt to function. 413 */ 414 if ((!rdi->driver_f.port_callback) || 415 (!rdi->driver_f.get_pci_dev)) 416 return -EINVAL; 417 break; 418 419 case QUERY_DEVICE: 420 check_driver_override(rdi, offsetof(struct ib_device, 421 query_device), 422 rvt_query_device); 423 break; 424 425 case MODIFY_DEVICE: 426 /* 427 * rdmavt does not support modify device currently drivers must 428 * provide. 429 */ 430 if (!check_driver_override(rdi, offsetof(struct ib_device, 431 modify_device), 432 rvt_modify_device)) 433 return -EOPNOTSUPP; 434 break; 435 436 case QUERY_PORT: 437 if (!check_driver_override(rdi, offsetof(struct ib_device, 438 query_port), 439 rvt_query_port)) 440 if (!rdi->driver_f.query_port_state) 441 return -EINVAL; 442 break; 443 444 case MODIFY_PORT: 445 if (!check_driver_override(rdi, offsetof(struct ib_device, 446 modify_port), 447 rvt_modify_port)) 448 if (!rdi->driver_f.cap_mask_chg || 449 !rdi->driver_f.shut_down_port) 450 return -EINVAL; 451 break; 452 453 case QUERY_PKEY: 454 check_driver_override(rdi, offsetof(struct ib_device, 455 query_pkey), 456 rvt_query_pkey); 457 break; 458 459 case QUERY_GID: 460 if (!check_driver_override(rdi, offsetof(struct ib_device, 461 query_gid), 462 rvt_query_gid)) 463 if (!rdi->driver_f.get_guid_be) 464 return -EINVAL; 465 break; 466 467 case ALLOC_UCONTEXT: 468 check_driver_override(rdi, offsetof(struct ib_device, 469 alloc_ucontext), 470 rvt_alloc_ucontext); 471 break; 472 473 case DEALLOC_UCONTEXT: 474 check_driver_override(rdi, offsetof(struct ib_device, 475 dealloc_ucontext), 476 rvt_dealloc_ucontext); 477 break; 478 479 case GET_PORT_IMMUTABLE: 480 check_driver_override(rdi, offsetof(struct ib_device, 481 get_port_immutable), 482 rvt_get_port_immutable); 483 break; 484 485 case CREATE_QP: 486 if (!check_driver_override(rdi, offsetof(struct ib_device, 487 create_qp), 488 rvt_create_qp)) 489 if (!rdi->driver_f.qp_priv_alloc || 490 !rdi->driver_f.qp_priv_free || 491 !rdi->driver_f.notify_qp_reset || 492 !rdi->driver_f.flush_qp_waiters || 493 !rdi->driver_f.stop_send_queue || 494 !rdi->driver_f.quiesce_qp) 495 return -EINVAL; 496 break; 497 498 case MODIFY_QP: 499 if (!check_driver_override(rdi, offsetof(struct ib_device, 500 modify_qp), 501 rvt_modify_qp)) 502 if (!rdi->driver_f.notify_qp_reset || 503 !rdi->driver_f.schedule_send || 504 !rdi->driver_f.get_pmtu_from_attr || 505 !rdi->driver_f.flush_qp_waiters || 506 !rdi->driver_f.stop_send_queue || 507 !rdi->driver_f.quiesce_qp || 508 !rdi->driver_f.notify_error_qp || 509 !rdi->driver_f.mtu_from_qp || 510 !rdi->driver_f.mtu_to_path_mtu) 511 return -EINVAL; 512 break; 513 514 case DESTROY_QP: 515 if (!check_driver_override(rdi, offsetof(struct ib_device, 516 destroy_qp), 517 rvt_destroy_qp)) 518 if (!rdi->driver_f.qp_priv_free || 519 !rdi->driver_f.notify_qp_reset || 520 !rdi->driver_f.flush_qp_waiters || 521 !rdi->driver_f.stop_send_queue || 522 !rdi->driver_f.quiesce_qp) 523 return -EINVAL; 524 break; 525 526 case QUERY_QP: 527 check_driver_override(rdi, offsetof(struct ib_device, 528 query_qp), 529 rvt_query_qp); 530 break; 531 532 case POST_SEND: 533 if (!check_driver_override(rdi, offsetof(struct ib_device, 534 post_send), 535 rvt_post_send)) 536 if (!rdi->driver_f.schedule_send || 537 !rdi->driver_f.do_send || 538 !rdi->post_parms) 539 return -EINVAL; 540 break; 541 542 case POST_RECV: 543 check_driver_override(rdi, offsetof(struct ib_device, 544 post_recv), 545 rvt_post_recv); 546 break; 547 case POST_SRQ_RECV: 548 check_driver_override(rdi, offsetof(struct ib_device, 549 post_srq_recv), 550 rvt_post_srq_recv); 551 break; 552 553 case CREATE_AH: 554 check_driver_override(rdi, offsetof(struct ib_device, 555 create_ah), 556 rvt_create_ah); 557 break; 558 559 case DESTROY_AH: 560 check_driver_override(rdi, offsetof(struct ib_device, 561 destroy_ah), 562 rvt_destroy_ah); 563 break; 564 565 case MODIFY_AH: 566 check_driver_override(rdi, offsetof(struct ib_device, 567 modify_ah), 568 rvt_modify_ah); 569 break; 570 571 case QUERY_AH: 572 check_driver_override(rdi, offsetof(struct ib_device, 573 query_ah), 574 rvt_query_ah); 575 break; 576 577 case CREATE_SRQ: 578 check_driver_override(rdi, offsetof(struct ib_device, 579 create_srq), 580 rvt_create_srq); 581 break; 582 583 case MODIFY_SRQ: 584 check_driver_override(rdi, offsetof(struct ib_device, 585 modify_srq), 586 rvt_modify_srq); 587 break; 588 589 case DESTROY_SRQ: 590 check_driver_override(rdi, offsetof(struct ib_device, 591 destroy_srq), 592 rvt_destroy_srq); 593 break; 594 595 case QUERY_SRQ: 596 check_driver_override(rdi, offsetof(struct ib_device, 597 query_srq), 598 rvt_query_srq); 599 break; 600 601 case ATTACH_MCAST: 602 check_driver_override(rdi, offsetof(struct ib_device, 603 attach_mcast), 604 rvt_attach_mcast); 605 break; 606 607 case DETACH_MCAST: 608 check_driver_override(rdi, offsetof(struct ib_device, 609 detach_mcast), 610 rvt_detach_mcast); 611 break; 612 613 case GET_DMA_MR: 614 check_driver_override(rdi, offsetof(struct ib_device, 615 get_dma_mr), 616 rvt_get_dma_mr); 617 break; 618 619 case REG_USER_MR: 620 check_driver_override(rdi, offsetof(struct ib_device, 621 reg_user_mr), 622 rvt_reg_user_mr); 623 break; 624 625 case DEREG_MR: 626 check_driver_override(rdi, offsetof(struct ib_device, 627 dereg_mr), 628 rvt_dereg_mr); 629 break; 630 631 case ALLOC_FMR: 632 check_driver_override(rdi, offsetof(struct ib_device, 633 alloc_fmr), 634 rvt_alloc_fmr); 635 break; 636 637 case ALLOC_MR: 638 check_driver_override(rdi, offsetof(struct ib_device, 639 alloc_mr), 640 rvt_alloc_mr); 641 break; 642 643 case MAP_MR_SG: 644 check_driver_override(rdi, offsetof(struct ib_device, 645 map_mr_sg), 646 rvt_map_mr_sg); 647 break; 648 649 case MAP_PHYS_FMR: 650 check_driver_override(rdi, offsetof(struct ib_device, 651 map_phys_fmr), 652 rvt_map_phys_fmr); 653 break; 654 655 case UNMAP_FMR: 656 check_driver_override(rdi, offsetof(struct ib_device, 657 unmap_fmr), 658 rvt_unmap_fmr); 659 break; 660 661 case DEALLOC_FMR: 662 check_driver_override(rdi, offsetof(struct ib_device, 663 dealloc_fmr), 664 rvt_dealloc_fmr); 665 break; 666 667 case MMAP: 668 check_driver_override(rdi, offsetof(struct ib_device, 669 mmap), 670 rvt_mmap); 671 break; 672 673 case CREATE_CQ: 674 check_driver_override(rdi, offsetof(struct ib_device, 675 create_cq), 676 rvt_create_cq); 677 break; 678 679 case DESTROY_CQ: 680 check_driver_override(rdi, offsetof(struct ib_device, 681 destroy_cq), 682 rvt_destroy_cq); 683 break; 684 685 case POLL_CQ: 686 check_driver_override(rdi, offsetof(struct ib_device, 687 poll_cq), 688 rvt_poll_cq); 689 break; 690 691 case REQ_NOTFIY_CQ: 692 check_driver_override(rdi, offsetof(struct ib_device, 693 req_notify_cq), 694 rvt_req_notify_cq); 695 break; 696 697 case RESIZE_CQ: 698 check_driver_override(rdi, offsetof(struct ib_device, 699 resize_cq), 700 rvt_resize_cq); 701 break; 702 703 case ALLOC_PD: 704 check_driver_override(rdi, offsetof(struct ib_device, 705 alloc_pd), 706 rvt_alloc_pd); 707 break; 708 709 case DEALLOC_PD: 710 check_driver_override(rdi, offsetof(struct ib_device, 711 dealloc_pd), 712 rvt_dealloc_pd); 713 break; 714 715 default: 716 return -EINVAL; 717 } 718 719 return 0; 720 } 721 722 /** 723 * rvt_register_device - register a driver 724 * @rdi: main dev structure for all of rdmavt operations 725 * 726 * It is up to drivers to allocate the rdi and fill in the appropriate 727 * information. 728 * 729 * Return: 0 on success otherwise an errno. 730 */ 731 int rvt_register_device(struct rvt_dev_info *rdi, u32 driver_id) 732 { 733 int ret = 0, i; 734 735 if (!rdi) 736 return -EINVAL; 737 738 /* 739 * Check to ensure drivers have setup the required helpers for the verbs 740 * they want rdmavt to handle 741 */ 742 for (i = 0; i < _VERB_IDX_MAX; i++) 743 if (check_support(rdi, i)) { 744 pr_err("Driver support req not met at %d\n", i); 745 return -EINVAL; 746 } 747 748 749 /* Once we get past here we can use rvt_pr macros and tracepoints */ 750 trace_rvt_dbg(rdi, "Driver attempting registration"); 751 rvt_mmap_init(rdi); 752 753 /* Queue Pairs */ 754 ret = rvt_driver_qp_init(rdi); 755 if (ret) { 756 pr_err("Error in driver QP init.\n"); 757 return -EINVAL; 758 } 759 760 /* Address Handle */ 761 spin_lock_init(&rdi->n_ahs_lock); 762 rdi->n_ahs_allocated = 0; 763 764 /* Shared Receive Queue */ 765 rvt_driver_srq_init(rdi); 766 767 /* Multicast */ 768 rvt_driver_mcast_init(rdi); 769 770 /* Mem Region */ 771 ret = rvt_driver_mr_init(rdi); 772 if (ret) { 773 pr_err("Error in driver MR init.\n"); 774 goto bail_no_mr; 775 } 776 777 /* Completion queues */ 778 spin_lock_init(&rdi->n_cqs_lock); 779 780 /* DMA Operations */ 781 rdi->ibdev.dev.dma_ops = rdi->ibdev.dev.dma_ops ? : &dma_virt_ops; 782 783 /* Protection Domain */ 784 spin_lock_init(&rdi->n_pds_lock); 785 rdi->n_pds_allocated = 0; 786 787 /* 788 * There are some things which could be set by underlying drivers but 789 * really should be up to rdmavt to set. For instance drivers can't know 790 * exactly which functions rdmavt supports, nor do they know the ABI 791 * version, so we do all of this sort of stuff here. 792 */ 793 rdi->ibdev.uverbs_abi_ver = RVT_UVERBS_ABI_VERSION; 794 rdi->ibdev.uverbs_cmd_mask = 795 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 796 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 797 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 798 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 799 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 800 (1ull << IB_USER_VERBS_CMD_CREATE_AH) | 801 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) | 802 (1ull << IB_USER_VERBS_CMD_QUERY_AH) | 803 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) | 804 (1ull << IB_USER_VERBS_CMD_REG_MR) | 805 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 806 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 807 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 808 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | 809 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 810 (1ull << IB_USER_VERBS_CMD_POLL_CQ) | 811 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | 812 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 813 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 814 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 815 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 816 (1ull << IB_USER_VERBS_CMD_POST_SEND) | 817 (1ull << IB_USER_VERBS_CMD_POST_RECV) | 818 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 819 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 820 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | 821 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | 822 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | 823 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | 824 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV); 825 rdi->ibdev.node_type = RDMA_NODE_IB_CA; 826 if (!rdi->ibdev.num_comp_vectors) 827 rdi->ibdev.num_comp_vectors = 1; 828 829 rdi->ibdev.driver_id = driver_id; 830 /* We are now good to announce we exist */ 831 ret = ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback); 832 if (ret) { 833 rvt_pr_err(rdi, "Failed to register driver with ib core.\n"); 834 goto bail_mr; 835 } 836 837 rvt_create_mad_agents(rdi); 838 839 rvt_pr_info(rdi, "Registration with rdmavt done.\n"); 840 return ret; 841 842 bail_mr: 843 rvt_mr_exit(rdi); 844 845 bail_no_mr: 846 rvt_qp_exit(rdi); 847 848 return ret; 849 } 850 EXPORT_SYMBOL(rvt_register_device); 851 852 /** 853 * rvt_unregister_device - remove a driver 854 * @rdi: rvt dev struct 855 */ 856 void rvt_unregister_device(struct rvt_dev_info *rdi) 857 { 858 trace_rvt_dbg(rdi, "Driver is unregistering."); 859 if (!rdi) 860 return; 861 862 rvt_free_mad_agents(rdi); 863 864 ib_unregister_device(&rdi->ibdev); 865 rvt_mr_exit(rdi); 866 rvt_qp_exit(rdi); 867 } 868 EXPORT_SYMBOL(rvt_unregister_device); 869 870 /** 871 * rvt_init_port - init internal data for driver port 872 * @rdi: rvt dev strut 873 * @port: rvt port 874 * @port_index: 0 based index of ports, different from IB core port num 875 * 876 * Keep track of a list of ports. No need to have a detach port. 877 * They persist until the driver goes away. 878 * 879 * Return: always 0 880 */ 881 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, 882 int port_index, u16 *pkey_table) 883 { 884 885 rdi->ports[port_index] = port; 886 rdi->ports[port_index]->pkey_table = pkey_table; 887 888 return 0; 889 } 890 EXPORT_SYMBOL(rvt_init_port); 891