1/* 2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved. 4 * Copyright (c) 2004 Intel Corporation. All rights reserved. 5 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 9 * 10 * This software is available to you under a choice of one of two 11 * licenses. You may choose to be licensed under the terms of the GNU 12 * General Public License (GPL) Version 2, available from the file 13 * COPYING in the main directory of this source tree, or the 14 * OpenIB.org BSD license below: 15 * 16 * Redistribution and use in source and binary forms, with or 17 * without modification, are permitted provided that the following 18 * conditions are met: 19 * 20 * - Redistributions of source code must retain the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer. 23 * 24 * - Redistributions in binary form must reproduce the above 25 * copyright notice, this list of conditions and the following 26 * disclaimer in the documentation and/or other materials 27 * provided with the distribution. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 36 * SOFTWARE. 37 * 38 * $Id: verbs.c,v 1.1.1.1 2007/10/11 23:31:50 Exp $ 39 */ 40 41#include <linux/errno.h> 42#include <linux/err.h> 43#include <linux/string.h> 44 45#include <rdma/ib_verbs.h> 46#include <rdma/ib_cache.h> 47 48int ib_rate_to_mult(enum ib_rate rate) 49{ 50 switch (rate) { 51 case IB_RATE_2_5_GBPS: return 1; 52 case IB_RATE_5_GBPS: return 2; 53 case IB_RATE_10_GBPS: return 4; 54 case IB_RATE_20_GBPS: return 8; 55 case IB_RATE_30_GBPS: return 12; 56 case IB_RATE_40_GBPS: return 16; 57 case IB_RATE_60_GBPS: return 24; 58 case IB_RATE_80_GBPS: return 32; 59 case IB_RATE_120_GBPS: return 48; 60 default: return -1; 61 } 62} 63EXPORT_SYMBOL(ib_rate_to_mult); 64 65enum ib_rate mult_to_ib_rate(int mult) 66{ 67 switch (mult) { 68 case 1: return IB_RATE_2_5_GBPS; 69 case 2: return IB_RATE_5_GBPS; 70 case 4: return IB_RATE_10_GBPS; 71 case 8: return IB_RATE_20_GBPS; 72 case 12: return IB_RATE_30_GBPS; 73 case 16: return IB_RATE_40_GBPS; 74 case 24: return IB_RATE_60_GBPS; 75 case 32: return IB_RATE_80_GBPS; 76 case 48: return IB_RATE_120_GBPS; 77 default: return IB_RATE_PORT_CURRENT; 78 } 79} 80EXPORT_SYMBOL(mult_to_ib_rate); 81 82enum rdma_transport_type 83rdma_node_get_transport(enum rdma_node_type node_type) 84{ 85 switch (node_type) { 86 case RDMA_NODE_IB_CA: 87 case RDMA_NODE_IB_SWITCH: 88 case RDMA_NODE_IB_ROUTER: 89 return RDMA_TRANSPORT_IB; 90 case RDMA_NODE_RNIC: 91 return RDMA_TRANSPORT_IWARP; 92 default: 93 BUG(); 94 return 0; 95 } 96} 97EXPORT_SYMBOL(rdma_node_get_transport); 98 99/* Protection domains */ 100 101struct ib_pd *ib_alloc_pd(struct ib_device *device) 102{ 103 struct ib_pd *pd; 104 105 pd = device->alloc_pd(device, NULL, NULL); 106 107 if (!IS_ERR(pd)) { 108 pd->device = device; 109 pd->uobject = NULL; 110 atomic_set(&pd->usecnt, 0); 111 } 112 113 return pd; 114} 115EXPORT_SYMBOL(ib_alloc_pd); 116 117int ib_dealloc_pd(struct ib_pd *pd) 118{ 119 if (atomic_read(&pd->usecnt)) 120 return -EBUSY; 121 122 return pd->device->dealloc_pd(pd); 123} 124EXPORT_SYMBOL(ib_dealloc_pd); 125 126/* Address handles */ 127 128struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 129{ 130 struct ib_ah *ah; 131 132 ah = pd->device->create_ah(pd, ah_attr); 133 134 if (!IS_ERR(ah)) { 135 ah->device = pd->device; 136 ah->pd = pd; 137 ah->uobject = NULL; 138 atomic_inc(&pd->usecnt); 139 } 140 141 return ah; 142} 143EXPORT_SYMBOL(ib_create_ah); 144 145int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc, 146 struct ib_grh *grh, struct ib_ah_attr *ah_attr) 147{ 148 u32 flow_class; 149 u16 gid_index; 150 int ret; 151 152 memset(ah_attr, 0, sizeof *ah_attr); 153 ah_attr->dlid = wc->slid; 154 ah_attr->sl = wc->sl; 155 ah_attr->src_path_bits = wc->dlid_path_bits; 156 ah_attr->port_num = port_num; 157 158 if (wc->wc_flags & IB_WC_GRH) { 159 ah_attr->ah_flags = IB_AH_GRH; 160 ah_attr->grh.dgid = grh->sgid; 161 162 ret = ib_find_cached_gid(device, &grh->dgid, &port_num, 163 &gid_index); 164 if (ret) 165 return ret; 166 167 ah_attr->grh.sgid_index = (u8) gid_index; 168 flow_class = be32_to_cpu(grh->version_tclass_flow); 169 ah_attr->grh.flow_label = flow_class & 0xFFFFF; 170 ah_attr->grh.hop_limit = 0xFF; 171 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF; 172 } 173 return 0; 174} 175EXPORT_SYMBOL(ib_init_ah_from_wc); 176 177struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc, 178 struct ib_grh *grh, u8 port_num) 179{ 180 struct ib_ah_attr ah_attr; 181 int ret; 182 183 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr); 184 if (ret) 185 return ERR_PTR(ret); 186 187 return ib_create_ah(pd, &ah_attr); 188} 189EXPORT_SYMBOL(ib_create_ah_from_wc); 190 191int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 192{ 193 return ah->device->modify_ah ? 194 ah->device->modify_ah(ah, ah_attr) : 195 -ENOSYS; 196} 197EXPORT_SYMBOL(ib_modify_ah); 198 199int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 200{ 201 return ah->device->query_ah ? 202 ah->device->query_ah(ah, ah_attr) : 203 -ENOSYS; 204} 205EXPORT_SYMBOL(ib_query_ah); 206 207int ib_destroy_ah(struct ib_ah *ah) 208{ 209 struct ib_pd *pd; 210 int ret; 211 212 pd = ah->pd; 213 ret = ah->device->destroy_ah(ah); 214 if (!ret) 215 atomic_dec(&pd->usecnt); 216 217 return ret; 218} 219EXPORT_SYMBOL(ib_destroy_ah); 220 221/* Shared receive queues */ 222 223struct ib_srq *ib_create_srq(struct ib_pd *pd, 224 struct ib_srq_init_attr *srq_init_attr) 225{ 226 struct ib_srq *srq; 227 228 if (!pd->device->create_srq) 229 return ERR_PTR(-ENOSYS); 230 231 srq = pd->device->create_srq(pd, srq_init_attr, NULL); 232 233 if (!IS_ERR(srq)) { 234 srq->device = pd->device; 235 srq->pd = pd; 236 srq->uobject = NULL; 237 srq->event_handler = srq_init_attr->event_handler; 238 srq->srq_context = srq_init_attr->srq_context; 239 atomic_inc(&pd->usecnt); 240 atomic_set(&srq->usecnt, 0); 241 } 242 243 return srq; 244} 245EXPORT_SYMBOL(ib_create_srq); 246 247int ib_modify_srq(struct ib_srq *srq, 248 struct ib_srq_attr *srq_attr, 249 enum ib_srq_attr_mask srq_attr_mask) 250{ 251 return srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL); 252} 253EXPORT_SYMBOL(ib_modify_srq); 254 255int ib_query_srq(struct ib_srq *srq, 256 struct ib_srq_attr *srq_attr) 257{ 258 return srq->device->query_srq ? 259 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 260} 261EXPORT_SYMBOL(ib_query_srq); 262 263int ib_destroy_srq(struct ib_srq *srq) 264{ 265 struct ib_pd *pd; 266 int ret; 267 268 if (atomic_read(&srq->usecnt)) 269 return -EBUSY; 270 271 pd = srq->pd; 272 273 ret = srq->device->destroy_srq(srq); 274 if (!ret) 275 atomic_dec(&pd->usecnt); 276 277 return ret; 278} 279EXPORT_SYMBOL(ib_destroy_srq); 280 281/* Queue pairs */ 282 283struct ib_qp *ib_create_qp(struct ib_pd *pd, 284 struct ib_qp_init_attr *qp_init_attr) 285{ 286 struct ib_qp *qp; 287 288 qp = pd->device->create_qp(pd, qp_init_attr, NULL); 289 290 if (!IS_ERR(qp)) { 291 qp->device = pd->device; 292 qp->pd = pd; 293 qp->send_cq = qp_init_attr->send_cq; 294 qp->recv_cq = qp_init_attr->recv_cq; 295 qp->srq = qp_init_attr->srq; 296 qp->uobject = NULL; 297 qp->event_handler = qp_init_attr->event_handler; 298 qp->qp_context = qp_init_attr->qp_context; 299 qp->qp_type = qp_init_attr->qp_type; 300 atomic_inc(&pd->usecnt); 301 atomic_inc(&qp_init_attr->send_cq->usecnt); 302 atomic_inc(&qp_init_attr->recv_cq->usecnt); 303 if (qp_init_attr->srq) 304 atomic_inc(&qp_init_attr->srq->usecnt); 305 } 306 307 return qp; 308} 309EXPORT_SYMBOL(ib_create_qp); 310 311static const struct { 312 int valid; 313 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1]; 314 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1]; 315} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 316 [IB_QPS_RESET] = { 317 [IB_QPS_RESET] = { .valid = 1 }, 318 [IB_QPS_ERR] = { .valid = 1 }, 319 [IB_QPS_INIT] = { 320 .valid = 1, 321 .req_param = { 322 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 323 IB_QP_PORT | 324 IB_QP_QKEY), 325 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 326 IB_QP_PORT | 327 IB_QP_ACCESS_FLAGS), 328 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 329 IB_QP_PORT | 330 IB_QP_ACCESS_FLAGS), 331 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 332 IB_QP_QKEY), 333 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 334 IB_QP_QKEY), 335 } 336 }, 337 }, 338 [IB_QPS_INIT] = { 339 [IB_QPS_RESET] = { .valid = 1 }, 340 [IB_QPS_ERR] = { .valid = 1 }, 341 [IB_QPS_INIT] = { 342 .valid = 1, 343 .opt_param = { 344 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 345 IB_QP_PORT | 346 IB_QP_QKEY), 347 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 348 IB_QP_PORT | 349 IB_QP_ACCESS_FLAGS), 350 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 351 IB_QP_PORT | 352 IB_QP_ACCESS_FLAGS), 353 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 354 IB_QP_QKEY), 355 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 356 IB_QP_QKEY), 357 } 358 }, 359 [IB_QPS_RTR] = { 360 .valid = 1, 361 .req_param = { 362 [IB_QPT_UC] = (IB_QP_AV | 363 IB_QP_PATH_MTU | 364 IB_QP_DEST_QPN | 365 IB_QP_RQ_PSN), 366 [IB_QPT_RC] = (IB_QP_AV | 367 IB_QP_PATH_MTU | 368 IB_QP_DEST_QPN | 369 IB_QP_RQ_PSN | 370 IB_QP_MAX_DEST_RD_ATOMIC | 371 IB_QP_MIN_RNR_TIMER), 372 }, 373 .opt_param = { 374 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 375 IB_QP_QKEY), 376 [IB_QPT_UC] = (IB_QP_ALT_PATH | 377 IB_QP_ACCESS_FLAGS | 378 IB_QP_PKEY_INDEX), 379 [IB_QPT_RC] = (IB_QP_ALT_PATH | 380 IB_QP_ACCESS_FLAGS | 381 IB_QP_PKEY_INDEX), 382 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 383 IB_QP_QKEY), 384 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 385 IB_QP_QKEY), 386 } 387 } 388 }, 389 [IB_QPS_RTR] = { 390 [IB_QPS_RESET] = { .valid = 1 }, 391 [IB_QPS_ERR] = { .valid = 1 }, 392 [IB_QPS_RTS] = { 393 .valid = 1, 394 .req_param = { 395 [IB_QPT_UD] = IB_QP_SQ_PSN, 396 [IB_QPT_UC] = IB_QP_SQ_PSN, 397 [IB_QPT_RC] = (IB_QP_TIMEOUT | 398 IB_QP_RETRY_CNT | 399 IB_QP_RNR_RETRY | 400 IB_QP_SQ_PSN | 401 IB_QP_MAX_QP_RD_ATOMIC), 402 [IB_QPT_SMI] = IB_QP_SQ_PSN, 403 [IB_QPT_GSI] = IB_QP_SQ_PSN, 404 }, 405 .opt_param = { 406 [IB_QPT_UD] = (IB_QP_CUR_STATE | 407 IB_QP_QKEY), 408 [IB_QPT_UC] = (IB_QP_CUR_STATE | 409 IB_QP_ALT_PATH | 410 IB_QP_ACCESS_FLAGS | 411 IB_QP_PATH_MIG_STATE), 412 [IB_QPT_RC] = (IB_QP_CUR_STATE | 413 IB_QP_ALT_PATH | 414 IB_QP_ACCESS_FLAGS | 415 IB_QP_MIN_RNR_TIMER | 416 IB_QP_PATH_MIG_STATE), 417 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 418 IB_QP_QKEY), 419 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 420 IB_QP_QKEY), 421 } 422 } 423 }, 424 [IB_QPS_RTS] = { 425 [IB_QPS_RESET] = { .valid = 1 }, 426 [IB_QPS_ERR] = { .valid = 1 }, 427 [IB_QPS_RTS] = { 428 .valid = 1, 429 .opt_param = { 430 [IB_QPT_UD] = (IB_QP_CUR_STATE | 431 IB_QP_QKEY), 432 [IB_QPT_UC] = (IB_QP_CUR_STATE | 433 IB_QP_ACCESS_FLAGS | 434 IB_QP_ALT_PATH | 435 IB_QP_PATH_MIG_STATE), 436 [IB_QPT_RC] = (IB_QP_CUR_STATE | 437 IB_QP_ACCESS_FLAGS | 438 IB_QP_ALT_PATH | 439 IB_QP_PATH_MIG_STATE | 440 IB_QP_MIN_RNR_TIMER), 441 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 442 IB_QP_QKEY), 443 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 444 IB_QP_QKEY), 445 } 446 }, 447 [IB_QPS_SQD] = { 448 .valid = 1, 449 .opt_param = { 450 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 451 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 452 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 453 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 454 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 455 } 456 }, 457 }, 458 [IB_QPS_SQD] = { 459 [IB_QPS_RESET] = { .valid = 1 }, 460 [IB_QPS_ERR] = { .valid = 1 }, 461 [IB_QPS_RTS] = { 462 .valid = 1, 463 .opt_param = { 464 [IB_QPT_UD] = (IB_QP_CUR_STATE | 465 IB_QP_QKEY), 466 [IB_QPT_UC] = (IB_QP_CUR_STATE | 467 IB_QP_ALT_PATH | 468 IB_QP_ACCESS_FLAGS | 469 IB_QP_PATH_MIG_STATE), 470 [IB_QPT_RC] = (IB_QP_CUR_STATE | 471 IB_QP_ALT_PATH | 472 IB_QP_ACCESS_FLAGS | 473 IB_QP_MIN_RNR_TIMER | 474 IB_QP_PATH_MIG_STATE), 475 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 476 IB_QP_QKEY), 477 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 478 IB_QP_QKEY), 479 } 480 }, 481 [IB_QPS_SQD] = { 482 .valid = 1, 483 .opt_param = { 484 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 485 IB_QP_QKEY), 486 [IB_QPT_UC] = (IB_QP_AV | 487 IB_QP_ALT_PATH | 488 IB_QP_ACCESS_FLAGS | 489 IB_QP_PKEY_INDEX | 490 IB_QP_PATH_MIG_STATE), 491 [IB_QPT_RC] = (IB_QP_PORT | 492 IB_QP_AV | 493 IB_QP_TIMEOUT | 494 IB_QP_RETRY_CNT | 495 IB_QP_RNR_RETRY | 496 IB_QP_MAX_QP_RD_ATOMIC | 497 IB_QP_MAX_DEST_RD_ATOMIC | 498 IB_QP_ALT_PATH | 499 IB_QP_ACCESS_FLAGS | 500 IB_QP_PKEY_INDEX | 501 IB_QP_MIN_RNR_TIMER | 502 IB_QP_PATH_MIG_STATE), 503 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 504 IB_QP_QKEY), 505 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 506 IB_QP_QKEY), 507 } 508 } 509 }, 510 [IB_QPS_SQE] = { 511 [IB_QPS_RESET] = { .valid = 1 }, 512 [IB_QPS_ERR] = { .valid = 1 }, 513 [IB_QPS_RTS] = { 514 .valid = 1, 515 .opt_param = { 516 [IB_QPT_UD] = (IB_QP_CUR_STATE | 517 IB_QP_QKEY), 518 [IB_QPT_UC] = (IB_QP_CUR_STATE | 519 IB_QP_ACCESS_FLAGS), 520 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 521 IB_QP_QKEY), 522 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 523 IB_QP_QKEY), 524 } 525 } 526 }, 527 [IB_QPS_ERR] = { 528 [IB_QPS_RESET] = { .valid = 1 }, 529 [IB_QPS_ERR] = { .valid = 1 } 530 } 531}; 532 533int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 534 enum ib_qp_type type, enum ib_qp_attr_mask mask) 535{ 536 enum ib_qp_attr_mask req_param, opt_param; 537 538 if (cur_state < 0 || cur_state > IB_QPS_ERR || 539 next_state < 0 || next_state > IB_QPS_ERR) 540 return 0; 541 542 if (mask & IB_QP_CUR_STATE && 543 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 544 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 545 return 0; 546 547 if (!qp_state_table[cur_state][next_state].valid) 548 return 0; 549 550 req_param = qp_state_table[cur_state][next_state].req_param[type]; 551 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 552 553 if ((mask & req_param) != req_param) 554 return 0; 555 556 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 557 return 0; 558 559 return 1; 560} 561EXPORT_SYMBOL(ib_modify_qp_is_ok); 562 563int ib_modify_qp(struct ib_qp *qp, 564 struct ib_qp_attr *qp_attr, 565 int qp_attr_mask) 566{ 567 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL); 568} 569EXPORT_SYMBOL(ib_modify_qp); 570 571int ib_query_qp(struct ib_qp *qp, 572 struct ib_qp_attr *qp_attr, 573 int qp_attr_mask, 574 struct ib_qp_init_attr *qp_init_attr) 575{ 576 return qp->device->query_qp ? 577 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) : 578 -ENOSYS; 579} 580EXPORT_SYMBOL(ib_query_qp); 581 582int ib_destroy_qp(struct ib_qp *qp) 583{ 584 struct ib_pd *pd; 585 struct ib_cq *scq, *rcq; 586 struct ib_srq *srq; 587 int ret; 588 589 pd = qp->pd; 590 scq = qp->send_cq; 591 rcq = qp->recv_cq; 592 srq = qp->srq; 593 594 ret = qp->device->destroy_qp(qp); 595 if (!ret) { 596 atomic_dec(&pd->usecnt); 597 atomic_dec(&scq->usecnt); 598 atomic_dec(&rcq->usecnt); 599 if (srq) 600 atomic_dec(&srq->usecnt); 601 } 602 603 return ret; 604} 605EXPORT_SYMBOL(ib_destroy_qp); 606 607/* Completion queues */ 608 609struct ib_cq *ib_create_cq(struct ib_device *device, 610 ib_comp_handler comp_handler, 611 void (*event_handler)(struct ib_event *, void *), 612 void *cq_context, int cqe, int comp_vector) 613{ 614 struct ib_cq *cq; 615 616 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL); 617 618 if (!IS_ERR(cq)) { 619 cq->device = device; 620 cq->uobject = NULL; 621 cq->comp_handler = comp_handler; 622 cq->event_handler = event_handler; 623 cq->cq_context = cq_context; 624 atomic_set(&cq->usecnt, 0); 625 } 626 627 return cq; 628} 629EXPORT_SYMBOL(ib_create_cq); 630 631int ib_destroy_cq(struct ib_cq *cq) 632{ 633 if (atomic_read(&cq->usecnt)) 634 return -EBUSY; 635 636 return cq->device->destroy_cq(cq); 637} 638EXPORT_SYMBOL(ib_destroy_cq); 639 640int ib_resize_cq(struct ib_cq *cq, int cqe) 641{ 642 return cq->device->resize_cq ? 643 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 644} 645EXPORT_SYMBOL(ib_resize_cq); 646 647/* Memory regions */ 648 649struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) 650{ 651 struct ib_mr *mr; 652 653 mr = pd->device->get_dma_mr(pd, mr_access_flags); 654 655 if (!IS_ERR(mr)) { 656 mr->device = pd->device; 657 mr->pd = pd; 658 mr->uobject = NULL; 659 atomic_inc(&pd->usecnt); 660 atomic_set(&mr->usecnt, 0); 661 } 662 663 return mr; 664} 665EXPORT_SYMBOL(ib_get_dma_mr); 666 667struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, 668 struct ib_phys_buf *phys_buf_array, 669 int num_phys_buf, 670 int mr_access_flags, 671 u64 *iova_start) 672{ 673 struct ib_mr *mr; 674 675 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, 676 mr_access_flags, iova_start); 677 678 if (!IS_ERR(mr)) { 679 mr->device = pd->device; 680 mr->pd = pd; 681 mr->uobject = NULL; 682 atomic_inc(&pd->usecnt); 683 atomic_set(&mr->usecnt, 0); 684 } 685 686 return mr; 687} 688EXPORT_SYMBOL(ib_reg_phys_mr); 689 690int ib_rereg_phys_mr(struct ib_mr *mr, 691 int mr_rereg_mask, 692 struct ib_pd *pd, 693 struct ib_phys_buf *phys_buf_array, 694 int num_phys_buf, 695 int mr_access_flags, 696 u64 *iova_start) 697{ 698 struct ib_pd *old_pd; 699 int ret; 700 701 if (!mr->device->rereg_phys_mr) 702 return -ENOSYS; 703 704 if (atomic_read(&mr->usecnt)) 705 return -EBUSY; 706 707 old_pd = mr->pd; 708 709 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, 710 phys_buf_array, num_phys_buf, 711 mr_access_flags, iova_start); 712 713 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { 714 atomic_dec(&old_pd->usecnt); 715 atomic_inc(&pd->usecnt); 716 } 717 718 return ret; 719} 720EXPORT_SYMBOL(ib_rereg_phys_mr); 721 722int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) 723{ 724 return mr->device->query_mr ? 725 mr->device->query_mr(mr, mr_attr) : -ENOSYS; 726} 727EXPORT_SYMBOL(ib_query_mr); 728 729int ib_dereg_mr(struct ib_mr *mr) 730{ 731 struct ib_pd *pd; 732 int ret; 733 734 if (atomic_read(&mr->usecnt)) 735 return -EBUSY; 736 737 pd = mr->pd; 738 ret = mr->device->dereg_mr(mr); 739 if (!ret) 740 atomic_dec(&pd->usecnt); 741 742 return ret; 743} 744EXPORT_SYMBOL(ib_dereg_mr); 745 746/* Memory windows */ 747 748struct ib_mw *ib_alloc_mw(struct ib_pd *pd) 749{ 750 struct ib_mw *mw; 751 752 if (!pd->device->alloc_mw) 753 return ERR_PTR(-ENOSYS); 754 755 mw = pd->device->alloc_mw(pd); 756 if (!IS_ERR(mw)) { 757 mw->device = pd->device; 758 mw->pd = pd; 759 mw->uobject = NULL; 760 atomic_inc(&pd->usecnt); 761 } 762 763 return mw; 764} 765EXPORT_SYMBOL(ib_alloc_mw); 766 767int ib_dealloc_mw(struct ib_mw *mw) 768{ 769 struct ib_pd *pd; 770 int ret; 771 772 pd = mw->pd; 773 ret = mw->device->dealloc_mw(mw); 774 if (!ret) 775 atomic_dec(&pd->usecnt); 776 777 return ret; 778} 779EXPORT_SYMBOL(ib_dealloc_mw); 780 781/* "Fast" memory regions */ 782 783struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 784 int mr_access_flags, 785 struct ib_fmr_attr *fmr_attr) 786{ 787 struct ib_fmr *fmr; 788 789 if (!pd->device->alloc_fmr) 790 return ERR_PTR(-ENOSYS); 791 792 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 793 if (!IS_ERR(fmr)) { 794 fmr->device = pd->device; 795 fmr->pd = pd; 796 atomic_inc(&pd->usecnt); 797 } 798 799 return fmr; 800} 801EXPORT_SYMBOL(ib_alloc_fmr); 802 803int ib_unmap_fmr(struct list_head *fmr_list) 804{ 805 struct ib_fmr *fmr; 806 807 if (list_empty(fmr_list)) 808 return 0; 809 810 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 811 return fmr->device->unmap_fmr(fmr_list); 812} 813EXPORT_SYMBOL(ib_unmap_fmr); 814 815int ib_dealloc_fmr(struct ib_fmr *fmr) 816{ 817 struct ib_pd *pd; 818 int ret; 819 820 pd = fmr->pd; 821 ret = fmr->device->dealloc_fmr(fmr); 822 if (!ret) 823 atomic_dec(&pd->usecnt); 824 825 return ret; 826} 827EXPORT_SYMBOL(ib_dealloc_fmr); 828 829/* Multicast groups */ 830 831int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 832{ 833 if (!qp->device->attach_mcast) 834 return -ENOSYS; 835 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 836 return -EINVAL; 837 838 return qp->device->attach_mcast(qp, gid, lid); 839} 840EXPORT_SYMBOL(ib_attach_mcast); 841 842int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 843{ 844 if (!qp->device->detach_mcast) 845 return -ENOSYS; 846 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 847 return -EINVAL; 848 849 return qp->device->detach_mcast(qp, gid, lid); 850} 851EXPORT_SYMBOL(ib_detach_mcast); 852