verbs.c revision 7ce5eacb45a7c819a6bec6ed486f27db9aab6ab6
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 1349 2004-12-16 21:09:43Z roland $ 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 ? 252 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 253 -ENOSYS; 254} 255EXPORT_SYMBOL(ib_modify_srq); 256 257int ib_query_srq(struct ib_srq *srq, 258 struct ib_srq_attr *srq_attr) 259{ 260 return srq->device->query_srq ? 261 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 262} 263EXPORT_SYMBOL(ib_query_srq); 264 265int ib_destroy_srq(struct ib_srq *srq) 266{ 267 struct ib_pd *pd; 268 int ret; 269 270 if (atomic_read(&srq->usecnt)) 271 return -EBUSY; 272 273 pd = srq->pd; 274 275 ret = srq->device->destroy_srq(srq); 276 if (!ret) 277 atomic_dec(&pd->usecnt); 278 279 return ret; 280} 281EXPORT_SYMBOL(ib_destroy_srq); 282 283/* Queue pairs */ 284 285struct ib_qp *ib_create_qp(struct ib_pd *pd, 286 struct ib_qp_init_attr *qp_init_attr) 287{ 288 struct ib_qp *qp; 289 290 qp = pd->device->create_qp(pd, qp_init_attr, NULL); 291 292 if (!IS_ERR(qp)) { 293 qp->device = pd->device; 294 qp->pd = pd; 295 qp->send_cq = qp_init_attr->send_cq; 296 qp->recv_cq = qp_init_attr->recv_cq; 297 qp->srq = qp_init_attr->srq; 298 qp->uobject = NULL; 299 qp->event_handler = qp_init_attr->event_handler; 300 qp->qp_context = qp_init_attr->qp_context; 301 qp->qp_type = qp_init_attr->qp_type; 302 atomic_inc(&pd->usecnt); 303 atomic_inc(&qp_init_attr->send_cq->usecnt); 304 atomic_inc(&qp_init_attr->recv_cq->usecnt); 305 if (qp_init_attr->srq) 306 atomic_inc(&qp_init_attr->srq->usecnt); 307 } 308 309 return qp; 310} 311EXPORT_SYMBOL(ib_create_qp); 312 313static const struct { 314 int valid; 315 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1]; 316 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1]; 317} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 318 [IB_QPS_RESET] = { 319 [IB_QPS_RESET] = { .valid = 1 }, 320 [IB_QPS_ERR] = { .valid = 1 }, 321 [IB_QPS_INIT] = { 322 .valid = 1, 323 .req_param = { 324 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 325 IB_QP_PORT | 326 IB_QP_QKEY), 327 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 328 IB_QP_PORT | 329 IB_QP_ACCESS_FLAGS), 330 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 331 IB_QP_PORT | 332 IB_QP_ACCESS_FLAGS), 333 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 334 IB_QP_QKEY), 335 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 336 IB_QP_QKEY), 337 } 338 }, 339 }, 340 [IB_QPS_INIT] = { 341 [IB_QPS_RESET] = { .valid = 1 }, 342 [IB_QPS_ERR] = { .valid = 1 }, 343 [IB_QPS_INIT] = { 344 .valid = 1, 345 .opt_param = { 346 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 347 IB_QP_PORT | 348 IB_QP_QKEY), 349 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 350 IB_QP_PORT | 351 IB_QP_ACCESS_FLAGS), 352 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 353 IB_QP_PORT | 354 IB_QP_ACCESS_FLAGS), 355 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 356 IB_QP_QKEY), 357 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 358 IB_QP_QKEY), 359 } 360 }, 361 [IB_QPS_RTR] = { 362 .valid = 1, 363 .req_param = { 364 [IB_QPT_UC] = (IB_QP_AV | 365 IB_QP_PATH_MTU | 366 IB_QP_DEST_QPN | 367 IB_QP_RQ_PSN), 368 [IB_QPT_RC] = (IB_QP_AV | 369 IB_QP_PATH_MTU | 370 IB_QP_DEST_QPN | 371 IB_QP_RQ_PSN | 372 IB_QP_MAX_DEST_RD_ATOMIC | 373 IB_QP_MIN_RNR_TIMER), 374 }, 375 .opt_param = { 376 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 377 IB_QP_QKEY), 378 [IB_QPT_UC] = (IB_QP_ALT_PATH | 379 IB_QP_ACCESS_FLAGS | 380 IB_QP_PKEY_INDEX), 381 [IB_QPT_RC] = (IB_QP_ALT_PATH | 382 IB_QP_ACCESS_FLAGS | 383 IB_QP_PKEY_INDEX), 384 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 385 IB_QP_QKEY), 386 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 387 IB_QP_QKEY), 388 } 389 } 390 }, 391 [IB_QPS_RTR] = { 392 [IB_QPS_RESET] = { .valid = 1 }, 393 [IB_QPS_ERR] = { .valid = 1 }, 394 [IB_QPS_RTS] = { 395 .valid = 1, 396 .req_param = { 397 [IB_QPT_UD] = IB_QP_SQ_PSN, 398 [IB_QPT_UC] = IB_QP_SQ_PSN, 399 [IB_QPT_RC] = (IB_QP_TIMEOUT | 400 IB_QP_RETRY_CNT | 401 IB_QP_RNR_RETRY | 402 IB_QP_SQ_PSN | 403 IB_QP_MAX_QP_RD_ATOMIC), 404 [IB_QPT_SMI] = IB_QP_SQ_PSN, 405 [IB_QPT_GSI] = IB_QP_SQ_PSN, 406 }, 407 .opt_param = { 408 [IB_QPT_UD] = (IB_QP_CUR_STATE | 409 IB_QP_QKEY), 410 [IB_QPT_UC] = (IB_QP_CUR_STATE | 411 IB_QP_ALT_PATH | 412 IB_QP_ACCESS_FLAGS | 413 IB_QP_PATH_MIG_STATE), 414 [IB_QPT_RC] = (IB_QP_CUR_STATE | 415 IB_QP_ALT_PATH | 416 IB_QP_ACCESS_FLAGS | 417 IB_QP_MIN_RNR_TIMER | 418 IB_QP_PATH_MIG_STATE), 419 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 420 IB_QP_QKEY), 421 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 422 IB_QP_QKEY), 423 } 424 } 425 }, 426 [IB_QPS_RTS] = { 427 [IB_QPS_RESET] = { .valid = 1 }, 428 [IB_QPS_ERR] = { .valid = 1 }, 429 [IB_QPS_RTS] = { 430 .valid = 1, 431 .opt_param = { 432 [IB_QPT_UD] = (IB_QP_CUR_STATE | 433 IB_QP_QKEY), 434 [IB_QPT_UC] = (IB_QP_CUR_STATE | 435 IB_QP_ACCESS_FLAGS | 436 IB_QP_ALT_PATH | 437 IB_QP_PATH_MIG_STATE), 438 [IB_QPT_RC] = (IB_QP_CUR_STATE | 439 IB_QP_ACCESS_FLAGS | 440 IB_QP_ALT_PATH | 441 IB_QP_PATH_MIG_STATE | 442 IB_QP_MIN_RNR_TIMER), 443 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 444 IB_QP_QKEY), 445 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 446 IB_QP_QKEY), 447 } 448 }, 449 [IB_QPS_SQD] = { 450 .valid = 1, 451 .opt_param = { 452 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 453 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 454 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 455 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 456 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 457 } 458 }, 459 }, 460 [IB_QPS_SQD] = { 461 [IB_QPS_RESET] = { .valid = 1 }, 462 [IB_QPS_ERR] = { .valid = 1 }, 463 [IB_QPS_RTS] = { 464 .valid = 1, 465 .opt_param = { 466 [IB_QPT_UD] = (IB_QP_CUR_STATE | 467 IB_QP_QKEY), 468 [IB_QPT_UC] = (IB_QP_CUR_STATE | 469 IB_QP_ALT_PATH | 470 IB_QP_ACCESS_FLAGS | 471 IB_QP_PATH_MIG_STATE), 472 [IB_QPT_RC] = (IB_QP_CUR_STATE | 473 IB_QP_ALT_PATH | 474 IB_QP_ACCESS_FLAGS | 475 IB_QP_MIN_RNR_TIMER | 476 IB_QP_PATH_MIG_STATE), 477 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 478 IB_QP_QKEY), 479 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 480 IB_QP_QKEY), 481 } 482 }, 483 [IB_QPS_SQD] = { 484 .valid = 1, 485 .opt_param = { 486 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 487 IB_QP_QKEY), 488 [IB_QPT_UC] = (IB_QP_AV | 489 IB_QP_ALT_PATH | 490 IB_QP_ACCESS_FLAGS | 491 IB_QP_PKEY_INDEX | 492 IB_QP_PATH_MIG_STATE), 493 [IB_QPT_RC] = (IB_QP_PORT | 494 IB_QP_AV | 495 IB_QP_TIMEOUT | 496 IB_QP_RETRY_CNT | 497 IB_QP_RNR_RETRY | 498 IB_QP_MAX_QP_RD_ATOMIC | 499 IB_QP_MAX_DEST_RD_ATOMIC | 500 IB_QP_ALT_PATH | 501 IB_QP_ACCESS_FLAGS | 502 IB_QP_PKEY_INDEX | 503 IB_QP_MIN_RNR_TIMER | 504 IB_QP_PATH_MIG_STATE), 505 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 506 IB_QP_QKEY), 507 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 508 IB_QP_QKEY), 509 } 510 } 511 }, 512 [IB_QPS_SQE] = { 513 [IB_QPS_RESET] = { .valid = 1 }, 514 [IB_QPS_ERR] = { .valid = 1 }, 515 [IB_QPS_RTS] = { 516 .valid = 1, 517 .opt_param = { 518 [IB_QPT_UD] = (IB_QP_CUR_STATE | 519 IB_QP_QKEY), 520 [IB_QPT_UC] = (IB_QP_CUR_STATE | 521 IB_QP_ACCESS_FLAGS), 522 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 523 IB_QP_QKEY), 524 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 525 IB_QP_QKEY), 526 } 527 } 528 }, 529 [IB_QPS_ERR] = { 530 [IB_QPS_RESET] = { .valid = 1 }, 531 [IB_QPS_ERR] = { .valid = 1 } 532 } 533}; 534 535int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 536 enum ib_qp_type type, enum ib_qp_attr_mask mask) 537{ 538 enum ib_qp_attr_mask req_param, opt_param; 539 540 if (cur_state < 0 || cur_state > IB_QPS_ERR || 541 next_state < 0 || next_state > IB_QPS_ERR) 542 return 0; 543 544 if (mask & IB_QP_CUR_STATE && 545 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 546 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 547 return 0; 548 549 if (!qp_state_table[cur_state][next_state].valid) 550 return 0; 551 552 req_param = qp_state_table[cur_state][next_state].req_param[type]; 553 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 554 555 if ((mask & req_param) != req_param) 556 return 0; 557 558 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 559 return 0; 560 561 return 1; 562} 563EXPORT_SYMBOL(ib_modify_qp_is_ok); 564 565int ib_modify_qp(struct ib_qp *qp, 566 struct ib_qp_attr *qp_attr, 567 int qp_attr_mask) 568{ 569 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL); 570} 571EXPORT_SYMBOL(ib_modify_qp); 572 573int ib_query_qp(struct ib_qp *qp, 574 struct ib_qp_attr *qp_attr, 575 int qp_attr_mask, 576 struct ib_qp_init_attr *qp_init_attr) 577{ 578 return qp->device->query_qp ? 579 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) : 580 -ENOSYS; 581} 582EXPORT_SYMBOL(ib_query_qp); 583 584int ib_destroy_qp(struct ib_qp *qp) 585{ 586 struct ib_pd *pd; 587 struct ib_cq *scq, *rcq; 588 struct ib_srq *srq; 589 int ret; 590 591 pd = qp->pd; 592 scq = qp->send_cq; 593 rcq = qp->recv_cq; 594 srq = qp->srq; 595 596 ret = qp->device->destroy_qp(qp); 597 if (!ret) { 598 atomic_dec(&pd->usecnt); 599 atomic_dec(&scq->usecnt); 600 atomic_dec(&rcq->usecnt); 601 if (srq) 602 atomic_dec(&srq->usecnt); 603 } 604 605 return ret; 606} 607EXPORT_SYMBOL(ib_destroy_qp); 608 609/* Completion queues */ 610 611struct ib_cq *ib_create_cq(struct ib_device *device, 612 ib_comp_handler comp_handler, 613 void (*event_handler)(struct ib_event *, void *), 614 void *cq_context, int cqe, int comp_vector) 615{ 616 struct ib_cq *cq; 617 618 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL); 619 620 if (!IS_ERR(cq)) { 621 cq->device = device; 622 cq->uobject = NULL; 623 cq->comp_handler = comp_handler; 624 cq->event_handler = event_handler; 625 cq->cq_context = cq_context; 626 atomic_set(&cq->usecnt, 0); 627 } 628 629 return cq; 630} 631EXPORT_SYMBOL(ib_create_cq); 632 633int ib_destroy_cq(struct ib_cq *cq) 634{ 635 if (atomic_read(&cq->usecnt)) 636 return -EBUSY; 637 638 return cq->device->destroy_cq(cq); 639} 640EXPORT_SYMBOL(ib_destroy_cq); 641 642int ib_resize_cq(struct ib_cq *cq, int cqe) 643{ 644 return cq->device->resize_cq ? 645 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 646} 647EXPORT_SYMBOL(ib_resize_cq); 648 649/* Memory regions */ 650 651struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) 652{ 653 struct ib_mr *mr; 654 655 mr = pd->device->get_dma_mr(pd, mr_access_flags); 656 657 if (!IS_ERR(mr)) { 658 mr->device = pd->device; 659 mr->pd = pd; 660 mr->uobject = NULL; 661 atomic_inc(&pd->usecnt); 662 atomic_set(&mr->usecnt, 0); 663 } 664 665 return mr; 666} 667EXPORT_SYMBOL(ib_get_dma_mr); 668 669struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, 670 struct ib_phys_buf *phys_buf_array, 671 int num_phys_buf, 672 int mr_access_flags, 673 u64 *iova_start) 674{ 675 struct ib_mr *mr; 676 677 if (!pd->device->reg_phys_mr) 678 return ERR_PTR(-ENOSYS); 679 680 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, 681 mr_access_flags, iova_start); 682 683 if (!IS_ERR(mr)) { 684 mr->device = pd->device; 685 mr->pd = pd; 686 mr->uobject = NULL; 687 atomic_inc(&pd->usecnt); 688 atomic_set(&mr->usecnt, 0); 689 } 690 691 return mr; 692} 693EXPORT_SYMBOL(ib_reg_phys_mr); 694 695int ib_rereg_phys_mr(struct ib_mr *mr, 696 int mr_rereg_mask, 697 struct ib_pd *pd, 698 struct ib_phys_buf *phys_buf_array, 699 int num_phys_buf, 700 int mr_access_flags, 701 u64 *iova_start) 702{ 703 struct ib_pd *old_pd; 704 int ret; 705 706 if (!mr->device->rereg_phys_mr) 707 return -ENOSYS; 708 709 if (atomic_read(&mr->usecnt)) 710 return -EBUSY; 711 712 old_pd = mr->pd; 713 714 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, 715 phys_buf_array, num_phys_buf, 716 mr_access_flags, iova_start); 717 718 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { 719 atomic_dec(&old_pd->usecnt); 720 atomic_inc(&pd->usecnt); 721 } 722 723 return ret; 724} 725EXPORT_SYMBOL(ib_rereg_phys_mr); 726 727int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) 728{ 729 return mr->device->query_mr ? 730 mr->device->query_mr(mr, mr_attr) : -ENOSYS; 731} 732EXPORT_SYMBOL(ib_query_mr); 733 734int ib_dereg_mr(struct ib_mr *mr) 735{ 736 struct ib_pd *pd; 737 int ret; 738 739 if (atomic_read(&mr->usecnt)) 740 return -EBUSY; 741 742 pd = mr->pd; 743 ret = mr->device->dereg_mr(mr); 744 if (!ret) 745 atomic_dec(&pd->usecnt); 746 747 return ret; 748} 749EXPORT_SYMBOL(ib_dereg_mr); 750 751/* Memory windows */ 752 753struct ib_mw *ib_alloc_mw(struct ib_pd *pd) 754{ 755 struct ib_mw *mw; 756 757 if (!pd->device->alloc_mw) 758 return ERR_PTR(-ENOSYS); 759 760 mw = pd->device->alloc_mw(pd); 761 if (!IS_ERR(mw)) { 762 mw->device = pd->device; 763 mw->pd = pd; 764 mw->uobject = NULL; 765 atomic_inc(&pd->usecnt); 766 } 767 768 return mw; 769} 770EXPORT_SYMBOL(ib_alloc_mw); 771 772int ib_dealloc_mw(struct ib_mw *mw) 773{ 774 struct ib_pd *pd; 775 int ret; 776 777 pd = mw->pd; 778 ret = mw->device->dealloc_mw(mw); 779 if (!ret) 780 atomic_dec(&pd->usecnt); 781 782 return ret; 783} 784EXPORT_SYMBOL(ib_dealloc_mw); 785 786/* "Fast" memory regions */ 787 788struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 789 int mr_access_flags, 790 struct ib_fmr_attr *fmr_attr) 791{ 792 struct ib_fmr *fmr; 793 794 if (!pd->device->alloc_fmr) 795 return ERR_PTR(-ENOSYS); 796 797 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 798 if (!IS_ERR(fmr)) { 799 fmr->device = pd->device; 800 fmr->pd = pd; 801 atomic_inc(&pd->usecnt); 802 } 803 804 return fmr; 805} 806EXPORT_SYMBOL(ib_alloc_fmr); 807 808int ib_unmap_fmr(struct list_head *fmr_list) 809{ 810 struct ib_fmr *fmr; 811 812 if (list_empty(fmr_list)) 813 return 0; 814 815 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 816 return fmr->device->unmap_fmr(fmr_list); 817} 818EXPORT_SYMBOL(ib_unmap_fmr); 819 820int ib_dealloc_fmr(struct ib_fmr *fmr) 821{ 822 struct ib_pd *pd; 823 int ret; 824 825 pd = fmr->pd; 826 ret = fmr->device->dealloc_fmr(fmr); 827 if (!ret) 828 atomic_dec(&pd->usecnt); 829 830 return ret; 831} 832EXPORT_SYMBOL(ib_dealloc_fmr); 833 834/* Multicast groups */ 835 836int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 837{ 838 if (!qp->device->attach_mcast) 839 return -ENOSYS; 840 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 841 return -EINVAL; 842 843 return qp->device->attach_mcast(qp, gid, lid); 844} 845EXPORT_SYMBOL(ib_attach_mcast); 846 847int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 848{ 849 if (!qp->device->detach_mcast) 850 return -ENOSYS; 851 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 852 return -EINVAL; 853 854 return qp->device->detach_mcast(qp, gid, lid); 855} 856EXPORT_SYMBOL(ib_detach_mcast); 857