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 39 #include <linux/errno.h> 40 #include <linux/err.h> 41 #include <linux/export.h> 42 #include <linux/string.h> 43 #include <linux/slab.h> 44 45 #include <rdma/ib_verbs.h> 46 #include <rdma/ib_cache.h> 47 48 int 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 } 63 EXPORT_SYMBOL(ib_rate_to_mult); 64 65 enum 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 } 80 EXPORT_SYMBOL(mult_to_ib_rate); 81 82 int ib_rate_to_mbps(enum ib_rate rate) 83 { 84 switch (rate) { 85 case IB_RATE_2_5_GBPS: return 2500; 86 case IB_RATE_5_GBPS: return 5000; 87 case IB_RATE_10_GBPS: return 10000; 88 case IB_RATE_20_GBPS: return 20000; 89 case IB_RATE_30_GBPS: return 30000; 90 case IB_RATE_40_GBPS: return 40000; 91 case IB_RATE_60_GBPS: return 60000; 92 case IB_RATE_80_GBPS: return 80000; 93 case IB_RATE_120_GBPS: return 120000; 94 case IB_RATE_14_GBPS: return 14062; 95 case IB_RATE_56_GBPS: return 56250; 96 case IB_RATE_112_GBPS: return 112500; 97 case IB_RATE_168_GBPS: return 168750; 98 case IB_RATE_25_GBPS: return 25781; 99 case IB_RATE_100_GBPS: return 103125; 100 case IB_RATE_200_GBPS: return 206250; 101 case IB_RATE_300_GBPS: return 309375; 102 default: return -1; 103 } 104 } 105 EXPORT_SYMBOL(ib_rate_to_mbps); 106 107 enum rdma_transport_type 108 rdma_node_get_transport(enum rdma_node_type node_type) 109 { 110 switch (node_type) { 111 case RDMA_NODE_IB_CA: 112 case RDMA_NODE_IB_SWITCH: 113 case RDMA_NODE_IB_ROUTER: 114 return RDMA_TRANSPORT_IB; 115 case RDMA_NODE_RNIC: 116 return RDMA_TRANSPORT_IWARP; 117 default: 118 BUG(); 119 return 0; 120 } 121 } 122 EXPORT_SYMBOL(rdma_node_get_transport); 123 124 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num) 125 { 126 if (device->get_link_layer) 127 return device->get_link_layer(device, port_num); 128 129 switch (rdma_node_get_transport(device->node_type)) { 130 case RDMA_TRANSPORT_IB: 131 return IB_LINK_LAYER_INFINIBAND; 132 case RDMA_TRANSPORT_IWARP: 133 return IB_LINK_LAYER_ETHERNET; 134 default: 135 return IB_LINK_LAYER_UNSPECIFIED; 136 } 137 } 138 EXPORT_SYMBOL(rdma_port_get_link_layer); 139 140 /* Protection domains */ 141 142 struct ib_pd *ib_alloc_pd(struct ib_device *device) 143 { 144 struct ib_pd *pd; 145 146 pd = device->alloc_pd(device, NULL, NULL); 147 148 if (!IS_ERR(pd)) { 149 pd->device = device; 150 pd->uobject = NULL; 151 atomic_set(&pd->usecnt, 0); 152 } 153 154 return pd; 155 } 156 EXPORT_SYMBOL(ib_alloc_pd); 157 158 int ib_dealloc_pd(struct ib_pd *pd) 159 { 160 if (atomic_read(&pd->usecnt)) 161 return -EBUSY; 162 163 return pd->device->dealloc_pd(pd); 164 } 165 EXPORT_SYMBOL(ib_dealloc_pd); 166 167 /* Address handles */ 168 169 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 170 { 171 struct ib_ah *ah; 172 173 ah = pd->device->create_ah(pd, ah_attr); 174 175 if (!IS_ERR(ah)) { 176 ah->device = pd->device; 177 ah->pd = pd; 178 ah->uobject = NULL; 179 atomic_inc(&pd->usecnt); 180 } 181 182 return ah; 183 } 184 EXPORT_SYMBOL(ib_create_ah); 185 186 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc, 187 struct ib_grh *grh, struct ib_ah_attr *ah_attr) 188 { 189 u32 flow_class; 190 u16 gid_index; 191 int ret; 192 193 memset(ah_attr, 0, sizeof *ah_attr); 194 ah_attr->dlid = wc->slid; 195 ah_attr->sl = wc->sl; 196 ah_attr->src_path_bits = wc->dlid_path_bits; 197 ah_attr->port_num = port_num; 198 199 if (wc->wc_flags & IB_WC_GRH) { 200 ah_attr->ah_flags = IB_AH_GRH; 201 ah_attr->grh.dgid = grh->sgid; 202 203 ret = ib_find_cached_gid(device, &grh->dgid, &port_num, 204 &gid_index); 205 if (ret) 206 return ret; 207 208 ah_attr->grh.sgid_index = (u8) gid_index; 209 flow_class = be32_to_cpu(grh->version_tclass_flow); 210 ah_attr->grh.flow_label = flow_class & 0xFFFFF; 211 ah_attr->grh.hop_limit = 0xFF; 212 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF; 213 } 214 return 0; 215 } 216 EXPORT_SYMBOL(ib_init_ah_from_wc); 217 218 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc, 219 struct ib_grh *grh, u8 port_num) 220 { 221 struct ib_ah_attr ah_attr; 222 int ret; 223 224 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr); 225 if (ret) 226 return ERR_PTR(ret); 227 228 return ib_create_ah(pd, &ah_attr); 229 } 230 EXPORT_SYMBOL(ib_create_ah_from_wc); 231 232 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 233 { 234 return ah->device->modify_ah ? 235 ah->device->modify_ah(ah, ah_attr) : 236 -ENOSYS; 237 } 238 EXPORT_SYMBOL(ib_modify_ah); 239 240 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 241 { 242 return ah->device->query_ah ? 243 ah->device->query_ah(ah, ah_attr) : 244 -ENOSYS; 245 } 246 EXPORT_SYMBOL(ib_query_ah); 247 248 int ib_destroy_ah(struct ib_ah *ah) 249 { 250 struct ib_pd *pd; 251 int ret; 252 253 pd = ah->pd; 254 ret = ah->device->destroy_ah(ah); 255 if (!ret) 256 atomic_dec(&pd->usecnt); 257 258 return ret; 259 } 260 EXPORT_SYMBOL(ib_destroy_ah); 261 262 /* Shared receive queues */ 263 264 struct ib_srq *ib_create_srq(struct ib_pd *pd, 265 struct ib_srq_init_attr *srq_init_attr) 266 { 267 struct ib_srq *srq; 268 269 if (!pd->device->create_srq) 270 return ERR_PTR(-ENOSYS); 271 272 srq = pd->device->create_srq(pd, srq_init_attr, NULL); 273 274 if (!IS_ERR(srq)) { 275 srq->device = pd->device; 276 srq->pd = pd; 277 srq->uobject = NULL; 278 srq->event_handler = srq_init_attr->event_handler; 279 srq->srq_context = srq_init_attr->srq_context; 280 srq->srq_type = srq_init_attr->srq_type; 281 if (srq->srq_type == IB_SRQT_XRC) { 282 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 283 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq; 284 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 285 atomic_inc(&srq->ext.xrc.cq->usecnt); 286 } 287 atomic_inc(&pd->usecnt); 288 atomic_set(&srq->usecnt, 0); 289 } 290 291 return srq; 292 } 293 EXPORT_SYMBOL(ib_create_srq); 294 295 int ib_modify_srq(struct ib_srq *srq, 296 struct ib_srq_attr *srq_attr, 297 enum ib_srq_attr_mask srq_attr_mask) 298 { 299 return srq->device->modify_srq ? 300 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 301 -ENOSYS; 302 } 303 EXPORT_SYMBOL(ib_modify_srq); 304 305 int ib_query_srq(struct ib_srq *srq, 306 struct ib_srq_attr *srq_attr) 307 { 308 return srq->device->query_srq ? 309 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 310 } 311 EXPORT_SYMBOL(ib_query_srq); 312 313 int ib_destroy_srq(struct ib_srq *srq) 314 { 315 struct ib_pd *pd; 316 enum ib_srq_type srq_type; 317 struct ib_xrcd *uninitialized_var(xrcd); 318 struct ib_cq *uninitialized_var(cq); 319 int ret; 320 321 if (atomic_read(&srq->usecnt)) 322 return -EBUSY; 323 324 pd = srq->pd; 325 srq_type = srq->srq_type; 326 if (srq_type == IB_SRQT_XRC) { 327 xrcd = srq->ext.xrc.xrcd; 328 cq = srq->ext.xrc.cq; 329 } 330 331 ret = srq->device->destroy_srq(srq); 332 if (!ret) { 333 atomic_dec(&pd->usecnt); 334 if (srq_type == IB_SRQT_XRC) { 335 atomic_dec(&xrcd->usecnt); 336 atomic_dec(&cq->usecnt); 337 } 338 } 339 340 return ret; 341 } 342 EXPORT_SYMBOL(ib_destroy_srq); 343 344 /* Queue pairs */ 345 346 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 347 { 348 struct ib_qp *qp = context; 349 350 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 351 if (event->element.qp->event_handler) 352 event->element.qp->event_handler(event, event->element.qp->qp_context); 353 } 354 355 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 356 { 357 mutex_lock(&xrcd->tgt_qp_mutex); 358 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 359 mutex_unlock(&xrcd->tgt_qp_mutex); 360 } 361 362 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 363 void (*event_handler)(struct ib_event *, void *), 364 void *qp_context) 365 { 366 struct ib_qp *qp; 367 unsigned long flags; 368 369 qp = kzalloc(sizeof *qp, GFP_KERNEL); 370 if (!qp) 371 return ERR_PTR(-ENOMEM); 372 373 qp->real_qp = real_qp; 374 atomic_inc(&real_qp->usecnt); 375 qp->device = real_qp->device; 376 qp->event_handler = event_handler; 377 qp->qp_context = qp_context; 378 qp->qp_num = real_qp->qp_num; 379 qp->qp_type = real_qp->qp_type; 380 381 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 382 list_add(&qp->open_list, &real_qp->open_list); 383 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 384 385 return qp; 386 } 387 388 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 389 struct ib_qp_open_attr *qp_open_attr) 390 { 391 struct ib_qp *qp, *real_qp; 392 393 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 394 return ERR_PTR(-EINVAL); 395 396 qp = ERR_PTR(-EINVAL); 397 mutex_lock(&xrcd->tgt_qp_mutex); 398 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 399 if (real_qp->qp_num == qp_open_attr->qp_num) { 400 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 401 qp_open_attr->qp_context); 402 break; 403 } 404 } 405 mutex_unlock(&xrcd->tgt_qp_mutex); 406 return qp; 407 } 408 EXPORT_SYMBOL(ib_open_qp); 409 410 struct ib_qp *ib_create_qp(struct ib_pd *pd, 411 struct ib_qp_init_attr *qp_init_attr) 412 { 413 struct ib_qp *qp, *real_qp; 414 struct ib_device *device; 415 416 device = pd ? pd->device : qp_init_attr->xrcd->device; 417 qp = device->create_qp(pd, qp_init_attr, NULL); 418 419 if (!IS_ERR(qp)) { 420 qp->device = device; 421 qp->real_qp = qp; 422 qp->uobject = NULL; 423 qp->qp_type = qp_init_attr->qp_type; 424 425 atomic_set(&qp->usecnt, 0); 426 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) { 427 qp->event_handler = __ib_shared_qp_event_handler; 428 qp->qp_context = qp; 429 qp->pd = NULL; 430 qp->send_cq = qp->recv_cq = NULL; 431 qp->srq = NULL; 432 qp->xrcd = qp_init_attr->xrcd; 433 atomic_inc(&qp_init_attr->xrcd->usecnt); 434 INIT_LIST_HEAD(&qp->open_list); 435 436 real_qp = qp; 437 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 438 qp_init_attr->qp_context); 439 if (!IS_ERR(qp)) 440 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 441 else 442 real_qp->device->destroy_qp(real_qp); 443 } else { 444 qp->event_handler = qp_init_attr->event_handler; 445 qp->qp_context = qp_init_attr->qp_context; 446 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 447 qp->recv_cq = NULL; 448 qp->srq = NULL; 449 } else { 450 qp->recv_cq = qp_init_attr->recv_cq; 451 atomic_inc(&qp_init_attr->recv_cq->usecnt); 452 qp->srq = qp_init_attr->srq; 453 if (qp->srq) 454 atomic_inc(&qp_init_attr->srq->usecnt); 455 } 456 457 qp->pd = pd; 458 qp->send_cq = qp_init_attr->send_cq; 459 qp->xrcd = NULL; 460 461 atomic_inc(&pd->usecnt); 462 atomic_inc(&qp_init_attr->send_cq->usecnt); 463 } 464 } 465 466 return qp; 467 } 468 EXPORT_SYMBOL(ib_create_qp); 469 470 static const struct { 471 int valid; 472 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 473 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 474 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 475 [IB_QPS_RESET] = { 476 [IB_QPS_RESET] = { .valid = 1 }, 477 [IB_QPS_INIT] = { 478 .valid = 1, 479 .req_param = { 480 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 481 IB_QP_PORT | 482 IB_QP_QKEY), 483 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 484 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 485 IB_QP_PORT | 486 IB_QP_ACCESS_FLAGS), 487 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 488 IB_QP_PORT | 489 IB_QP_ACCESS_FLAGS), 490 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 491 IB_QP_PORT | 492 IB_QP_ACCESS_FLAGS), 493 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 494 IB_QP_PORT | 495 IB_QP_ACCESS_FLAGS), 496 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 497 IB_QP_QKEY), 498 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 499 IB_QP_QKEY), 500 } 501 }, 502 }, 503 [IB_QPS_INIT] = { 504 [IB_QPS_RESET] = { .valid = 1 }, 505 [IB_QPS_ERR] = { .valid = 1 }, 506 [IB_QPS_INIT] = { 507 .valid = 1, 508 .opt_param = { 509 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 510 IB_QP_PORT | 511 IB_QP_QKEY), 512 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 513 IB_QP_PORT | 514 IB_QP_ACCESS_FLAGS), 515 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 516 IB_QP_PORT | 517 IB_QP_ACCESS_FLAGS), 518 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 519 IB_QP_PORT | 520 IB_QP_ACCESS_FLAGS), 521 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 522 IB_QP_PORT | 523 IB_QP_ACCESS_FLAGS), 524 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 525 IB_QP_QKEY), 526 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 527 IB_QP_QKEY), 528 } 529 }, 530 [IB_QPS_RTR] = { 531 .valid = 1, 532 .req_param = { 533 [IB_QPT_UC] = (IB_QP_AV | 534 IB_QP_PATH_MTU | 535 IB_QP_DEST_QPN | 536 IB_QP_RQ_PSN), 537 [IB_QPT_RC] = (IB_QP_AV | 538 IB_QP_PATH_MTU | 539 IB_QP_DEST_QPN | 540 IB_QP_RQ_PSN | 541 IB_QP_MAX_DEST_RD_ATOMIC | 542 IB_QP_MIN_RNR_TIMER), 543 [IB_QPT_XRC_INI] = (IB_QP_AV | 544 IB_QP_PATH_MTU | 545 IB_QP_DEST_QPN | 546 IB_QP_RQ_PSN), 547 [IB_QPT_XRC_TGT] = (IB_QP_AV | 548 IB_QP_PATH_MTU | 549 IB_QP_DEST_QPN | 550 IB_QP_RQ_PSN | 551 IB_QP_MAX_DEST_RD_ATOMIC | 552 IB_QP_MIN_RNR_TIMER), 553 }, 554 .opt_param = { 555 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 556 IB_QP_QKEY), 557 [IB_QPT_UC] = (IB_QP_ALT_PATH | 558 IB_QP_ACCESS_FLAGS | 559 IB_QP_PKEY_INDEX), 560 [IB_QPT_RC] = (IB_QP_ALT_PATH | 561 IB_QP_ACCESS_FLAGS | 562 IB_QP_PKEY_INDEX), 563 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 564 IB_QP_ACCESS_FLAGS | 565 IB_QP_PKEY_INDEX), 566 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 567 IB_QP_ACCESS_FLAGS | 568 IB_QP_PKEY_INDEX), 569 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 570 IB_QP_QKEY), 571 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 572 IB_QP_QKEY), 573 } 574 } 575 }, 576 [IB_QPS_RTR] = { 577 [IB_QPS_RESET] = { .valid = 1 }, 578 [IB_QPS_ERR] = { .valid = 1 }, 579 [IB_QPS_RTS] = { 580 .valid = 1, 581 .req_param = { 582 [IB_QPT_UD] = IB_QP_SQ_PSN, 583 [IB_QPT_UC] = IB_QP_SQ_PSN, 584 [IB_QPT_RC] = (IB_QP_TIMEOUT | 585 IB_QP_RETRY_CNT | 586 IB_QP_RNR_RETRY | 587 IB_QP_SQ_PSN | 588 IB_QP_MAX_QP_RD_ATOMIC), 589 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 590 IB_QP_RETRY_CNT | 591 IB_QP_RNR_RETRY | 592 IB_QP_SQ_PSN | 593 IB_QP_MAX_QP_RD_ATOMIC), 594 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 595 IB_QP_SQ_PSN), 596 [IB_QPT_SMI] = IB_QP_SQ_PSN, 597 [IB_QPT_GSI] = IB_QP_SQ_PSN, 598 }, 599 .opt_param = { 600 [IB_QPT_UD] = (IB_QP_CUR_STATE | 601 IB_QP_QKEY), 602 [IB_QPT_UC] = (IB_QP_CUR_STATE | 603 IB_QP_ALT_PATH | 604 IB_QP_ACCESS_FLAGS | 605 IB_QP_PATH_MIG_STATE), 606 [IB_QPT_RC] = (IB_QP_CUR_STATE | 607 IB_QP_ALT_PATH | 608 IB_QP_ACCESS_FLAGS | 609 IB_QP_MIN_RNR_TIMER | 610 IB_QP_PATH_MIG_STATE), 611 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 612 IB_QP_ALT_PATH | 613 IB_QP_ACCESS_FLAGS | 614 IB_QP_PATH_MIG_STATE), 615 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 616 IB_QP_ALT_PATH | 617 IB_QP_ACCESS_FLAGS | 618 IB_QP_MIN_RNR_TIMER | 619 IB_QP_PATH_MIG_STATE), 620 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 621 IB_QP_QKEY), 622 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 623 IB_QP_QKEY), 624 } 625 } 626 }, 627 [IB_QPS_RTS] = { 628 [IB_QPS_RESET] = { .valid = 1 }, 629 [IB_QPS_ERR] = { .valid = 1 }, 630 [IB_QPS_RTS] = { 631 .valid = 1, 632 .opt_param = { 633 [IB_QPT_UD] = (IB_QP_CUR_STATE | 634 IB_QP_QKEY), 635 [IB_QPT_UC] = (IB_QP_CUR_STATE | 636 IB_QP_ACCESS_FLAGS | 637 IB_QP_ALT_PATH | 638 IB_QP_PATH_MIG_STATE), 639 [IB_QPT_RC] = (IB_QP_CUR_STATE | 640 IB_QP_ACCESS_FLAGS | 641 IB_QP_ALT_PATH | 642 IB_QP_PATH_MIG_STATE | 643 IB_QP_MIN_RNR_TIMER), 644 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 645 IB_QP_ACCESS_FLAGS | 646 IB_QP_ALT_PATH | 647 IB_QP_PATH_MIG_STATE), 648 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 649 IB_QP_ACCESS_FLAGS | 650 IB_QP_ALT_PATH | 651 IB_QP_PATH_MIG_STATE | 652 IB_QP_MIN_RNR_TIMER), 653 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 654 IB_QP_QKEY), 655 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 656 IB_QP_QKEY), 657 } 658 }, 659 [IB_QPS_SQD] = { 660 .valid = 1, 661 .opt_param = { 662 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 663 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 664 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 665 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 666 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 667 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 668 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 669 } 670 }, 671 }, 672 [IB_QPS_SQD] = { 673 [IB_QPS_RESET] = { .valid = 1 }, 674 [IB_QPS_ERR] = { .valid = 1 }, 675 [IB_QPS_RTS] = { 676 .valid = 1, 677 .opt_param = { 678 [IB_QPT_UD] = (IB_QP_CUR_STATE | 679 IB_QP_QKEY), 680 [IB_QPT_UC] = (IB_QP_CUR_STATE | 681 IB_QP_ALT_PATH | 682 IB_QP_ACCESS_FLAGS | 683 IB_QP_PATH_MIG_STATE), 684 [IB_QPT_RC] = (IB_QP_CUR_STATE | 685 IB_QP_ALT_PATH | 686 IB_QP_ACCESS_FLAGS | 687 IB_QP_MIN_RNR_TIMER | 688 IB_QP_PATH_MIG_STATE), 689 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 690 IB_QP_ALT_PATH | 691 IB_QP_ACCESS_FLAGS | 692 IB_QP_PATH_MIG_STATE), 693 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 694 IB_QP_ALT_PATH | 695 IB_QP_ACCESS_FLAGS | 696 IB_QP_MIN_RNR_TIMER | 697 IB_QP_PATH_MIG_STATE), 698 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 699 IB_QP_QKEY), 700 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 701 IB_QP_QKEY), 702 } 703 }, 704 [IB_QPS_SQD] = { 705 .valid = 1, 706 .opt_param = { 707 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 708 IB_QP_QKEY), 709 [IB_QPT_UC] = (IB_QP_AV | 710 IB_QP_ALT_PATH | 711 IB_QP_ACCESS_FLAGS | 712 IB_QP_PKEY_INDEX | 713 IB_QP_PATH_MIG_STATE), 714 [IB_QPT_RC] = (IB_QP_PORT | 715 IB_QP_AV | 716 IB_QP_TIMEOUT | 717 IB_QP_RETRY_CNT | 718 IB_QP_RNR_RETRY | 719 IB_QP_MAX_QP_RD_ATOMIC | 720 IB_QP_MAX_DEST_RD_ATOMIC | 721 IB_QP_ALT_PATH | 722 IB_QP_ACCESS_FLAGS | 723 IB_QP_PKEY_INDEX | 724 IB_QP_MIN_RNR_TIMER | 725 IB_QP_PATH_MIG_STATE), 726 [IB_QPT_XRC_INI] = (IB_QP_PORT | 727 IB_QP_AV | 728 IB_QP_TIMEOUT | 729 IB_QP_RETRY_CNT | 730 IB_QP_RNR_RETRY | 731 IB_QP_MAX_QP_RD_ATOMIC | 732 IB_QP_ALT_PATH | 733 IB_QP_ACCESS_FLAGS | 734 IB_QP_PKEY_INDEX | 735 IB_QP_PATH_MIG_STATE), 736 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 737 IB_QP_AV | 738 IB_QP_TIMEOUT | 739 IB_QP_MAX_DEST_RD_ATOMIC | 740 IB_QP_ALT_PATH | 741 IB_QP_ACCESS_FLAGS | 742 IB_QP_PKEY_INDEX | 743 IB_QP_MIN_RNR_TIMER | 744 IB_QP_PATH_MIG_STATE), 745 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 746 IB_QP_QKEY), 747 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 748 IB_QP_QKEY), 749 } 750 } 751 }, 752 [IB_QPS_SQE] = { 753 [IB_QPS_RESET] = { .valid = 1 }, 754 [IB_QPS_ERR] = { .valid = 1 }, 755 [IB_QPS_RTS] = { 756 .valid = 1, 757 .opt_param = { 758 [IB_QPT_UD] = (IB_QP_CUR_STATE | 759 IB_QP_QKEY), 760 [IB_QPT_UC] = (IB_QP_CUR_STATE | 761 IB_QP_ACCESS_FLAGS), 762 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 763 IB_QP_QKEY), 764 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 765 IB_QP_QKEY), 766 } 767 } 768 }, 769 [IB_QPS_ERR] = { 770 [IB_QPS_RESET] = { .valid = 1 }, 771 [IB_QPS_ERR] = { .valid = 1 } 772 } 773 }; 774 775 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 776 enum ib_qp_type type, enum ib_qp_attr_mask mask) 777 { 778 enum ib_qp_attr_mask req_param, opt_param; 779 780 if (cur_state < 0 || cur_state > IB_QPS_ERR || 781 next_state < 0 || next_state > IB_QPS_ERR) 782 return 0; 783 784 if (mask & IB_QP_CUR_STATE && 785 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 786 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 787 return 0; 788 789 if (!qp_state_table[cur_state][next_state].valid) 790 return 0; 791 792 req_param = qp_state_table[cur_state][next_state].req_param[type]; 793 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 794 795 if ((mask & req_param) != req_param) 796 return 0; 797 798 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 799 return 0; 800 801 return 1; 802 } 803 EXPORT_SYMBOL(ib_modify_qp_is_ok); 804 805 int ib_modify_qp(struct ib_qp *qp, 806 struct ib_qp_attr *qp_attr, 807 int qp_attr_mask) 808 { 809 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 810 } 811 EXPORT_SYMBOL(ib_modify_qp); 812 813 int ib_query_qp(struct ib_qp *qp, 814 struct ib_qp_attr *qp_attr, 815 int qp_attr_mask, 816 struct ib_qp_init_attr *qp_init_attr) 817 { 818 return qp->device->query_qp ? 819 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 820 -ENOSYS; 821 } 822 EXPORT_SYMBOL(ib_query_qp); 823 824 int ib_close_qp(struct ib_qp *qp) 825 { 826 struct ib_qp *real_qp; 827 unsigned long flags; 828 829 real_qp = qp->real_qp; 830 if (real_qp == qp) 831 return -EINVAL; 832 833 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 834 list_del(&qp->open_list); 835 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 836 837 atomic_dec(&real_qp->usecnt); 838 kfree(qp); 839 840 return 0; 841 } 842 EXPORT_SYMBOL(ib_close_qp); 843 844 static int __ib_destroy_shared_qp(struct ib_qp *qp) 845 { 846 struct ib_xrcd *xrcd; 847 struct ib_qp *real_qp; 848 int ret; 849 850 real_qp = qp->real_qp; 851 xrcd = real_qp->xrcd; 852 853 mutex_lock(&xrcd->tgt_qp_mutex); 854 ib_close_qp(qp); 855 if (atomic_read(&real_qp->usecnt) == 0) 856 list_del(&real_qp->xrcd_list); 857 else 858 real_qp = NULL; 859 mutex_unlock(&xrcd->tgt_qp_mutex); 860 861 if (real_qp) { 862 ret = ib_destroy_qp(real_qp); 863 if (!ret) 864 atomic_dec(&xrcd->usecnt); 865 else 866 __ib_insert_xrcd_qp(xrcd, real_qp); 867 } 868 869 return 0; 870 } 871 872 int ib_destroy_qp(struct ib_qp *qp) 873 { 874 struct ib_pd *pd; 875 struct ib_cq *scq, *rcq; 876 struct ib_srq *srq; 877 int ret; 878 879 if (atomic_read(&qp->usecnt)) 880 return -EBUSY; 881 882 if (qp->real_qp != qp) 883 return __ib_destroy_shared_qp(qp); 884 885 pd = qp->pd; 886 scq = qp->send_cq; 887 rcq = qp->recv_cq; 888 srq = qp->srq; 889 890 ret = qp->device->destroy_qp(qp); 891 if (!ret) { 892 if (pd) 893 atomic_dec(&pd->usecnt); 894 if (scq) 895 atomic_dec(&scq->usecnt); 896 if (rcq) 897 atomic_dec(&rcq->usecnt); 898 if (srq) 899 atomic_dec(&srq->usecnt); 900 } 901 902 return ret; 903 } 904 EXPORT_SYMBOL(ib_destroy_qp); 905 906 /* Completion queues */ 907 908 struct ib_cq *ib_create_cq(struct ib_device *device, 909 ib_comp_handler comp_handler, 910 void (*event_handler)(struct ib_event *, void *), 911 void *cq_context, int cqe, int comp_vector) 912 { 913 struct ib_cq *cq; 914 915 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL); 916 917 if (!IS_ERR(cq)) { 918 cq->device = device; 919 cq->uobject = NULL; 920 cq->comp_handler = comp_handler; 921 cq->event_handler = event_handler; 922 cq->cq_context = cq_context; 923 atomic_set(&cq->usecnt, 0); 924 } 925 926 return cq; 927 } 928 EXPORT_SYMBOL(ib_create_cq); 929 930 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 931 { 932 return cq->device->modify_cq ? 933 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS; 934 } 935 EXPORT_SYMBOL(ib_modify_cq); 936 937 int ib_destroy_cq(struct ib_cq *cq) 938 { 939 if (atomic_read(&cq->usecnt)) 940 return -EBUSY; 941 942 return cq->device->destroy_cq(cq); 943 } 944 EXPORT_SYMBOL(ib_destroy_cq); 945 946 int ib_resize_cq(struct ib_cq *cq, int cqe) 947 { 948 return cq->device->resize_cq ? 949 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 950 } 951 EXPORT_SYMBOL(ib_resize_cq); 952 953 /* Memory regions */ 954 955 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) 956 { 957 struct ib_mr *mr; 958 959 mr = pd->device->get_dma_mr(pd, mr_access_flags); 960 961 if (!IS_ERR(mr)) { 962 mr->device = pd->device; 963 mr->pd = pd; 964 mr->uobject = NULL; 965 atomic_inc(&pd->usecnt); 966 atomic_set(&mr->usecnt, 0); 967 } 968 969 return mr; 970 } 971 EXPORT_SYMBOL(ib_get_dma_mr); 972 973 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, 974 struct ib_phys_buf *phys_buf_array, 975 int num_phys_buf, 976 int mr_access_flags, 977 u64 *iova_start) 978 { 979 struct ib_mr *mr; 980 981 if (!pd->device->reg_phys_mr) 982 return ERR_PTR(-ENOSYS); 983 984 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, 985 mr_access_flags, iova_start); 986 987 if (!IS_ERR(mr)) { 988 mr->device = pd->device; 989 mr->pd = pd; 990 mr->uobject = NULL; 991 atomic_inc(&pd->usecnt); 992 atomic_set(&mr->usecnt, 0); 993 } 994 995 return mr; 996 } 997 EXPORT_SYMBOL(ib_reg_phys_mr); 998 999 int ib_rereg_phys_mr(struct ib_mr *mr, 1000 int mr_rereg_mask, 1001 struct ib_pd *pd, 1002 struct ib_phys_buf *phys_buf_array, 1003 int num_phys_buf, 1004 int mr_access_flags, 1005 u64 *iova_start) 1006 { 1007 struct ib_pd *old_pd; 1008 int ret; 1009 1010 if (!mr->device->rereg_phys_mr) 1011 return -ENOSYS; 1012 1013 if (atomic_read(&mr->usecnt)) 1014 return -EBUSY; 1015 1016 old_pd = mr->pd; 1017 1018 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, 1019 phys_buf_array, num_phys_buf, 1020 mr_access_flags, iova_start); 1021 1022 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { 1023 atomic_dec(&old_pd->usecnt); 1024 atomic_inc(&pd->usecnt); 1025 } 1026 1027 return ret; 1028 } 1029 EXPORT_SYMBOL(ib_rereg_phys_mr); 1030 1031 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) 1032 { 1033 return mr->device->query_mr ? 1034 mr->device->query_mr(mr, mr_attr) : -ENOSYS; 1035 } 1036 EXPORT_SYMBOL(ib_query_mr); 1037 1038 int ib_dereg_mr(struct ib_mr *mr) 1039 { 1040 struct ib_pd *pd; 1041 int ret; 1042 1043 if (atomic_read(&mr->usecnt)) 1044 return -EBUSY; 1045 1046 pd = mr->pd; 1047 ret = mr->device->dereg_mr(mr); 1048 if (!ret) 1049 atomic_dec(&pd->usecnt); 1050 1051 return ret; 1052 } 1053 EXPORT_SYMBOL(ib_dereg_mr); 1054 1055 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len) 1056 { 1057 struct ib_mr *mr; 1058 1059 if (!pd->device->alloc_fast_reg_mr) 1060 return ERR_PTR(-ENOSYS); 1061 1062 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len); 1063 1064 if (!IS_ERR(mr)) { 1065 mr->device = pd->device; 1066 mr->pd = pd; 1067 mr->uobject = NULL; 1068 atomic_inc(&pd->usecnt); 1069 atomic_set(&mr->usecnt, 0); 1070 } 1071 1072 return mr; 1073 } 1074 EXPORT_SYMBOL(ib_alloc_fast_reg_mr); 1075 1076 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device, 1077 int max_page_list_len) 1078 { 1079 struct ib_fast_reg_page_list *page_list; 1080 1081 if (!device->alloc_fast_reg_page_list) 1082 return ERR_PTR(-ENOSYS); 1083 1084 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len); 1085 1086 if (!IS_ERR(page_list)) { 1087 page_list->device = device; 1088 page_list->max_page_list_len = max_page_list_len; 1089 } 1090 1091 return page_list; 1092 } 1093 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list); 1094 1095 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) 1096 { 1097 page_list->device->free_fast_reg_page_list(page_list); 1098 } 1099 EXPORT_SYMBOL(ib_free_fast_reg_page_list); 1100 1101 /* Memory windows */ 1102 1103 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) 1104 { 1105 struct ib_mw *mw; 1106 1107 if (!pd->device->alloc_mw) 1108 return ERR_PTR(-ENOSYS); 1109 1110 mw = pd->device->alloc_mw(pd, type); 1111 if (!IS_ERR(mw)) { 1112 mw->device = pd->device; 1113 mw->pd = pd; 1114 mw->uobject = NULL; 1115 mw->type = type; 1116 atomic_inc(&pd->usecnt); 1117 } 1118 1119 return mw; 1120 } 1121 EXPORT_SYMBOL(ib_alloc_mw); 1122 1123 int ib_dealloc_mw(struct ib_mw *mw) 1124 { 1125 struct ib_pd *pd; 1126 int ret; 1127 1128 pd = mw->pd; 1129 ret = mw->device->dealloc_mw(mw); 1130 if (!ret) 1131 atomic_dec(&pd->usecnt); 1132 1133 return ret; 1134 } 1135 EXPORT_SYMBOL(ib_dealloc_mw); 1136 1137 /* "Fast" memory regions */ 1138 1139 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1140 int mr_access_flags, 1141 struct ib_fmr_attr *fmr_attr) 1142 { 1143 struct ib_fmr *fmr; 1144 1145 if (!pd->device->alloc_fmr) 1146 return ERR_PTR(-ENOSYS); 1147 1148 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1149 if (!IS_ERR(fmr)) { 1150 fmr->device = pd->device; 1151 fmr->pd = pd; 1152 atomic_inc(&pd->usecnt); 1153 } 1154 1155 return fmr; 1156 } 1157 EXPORT_SYMBOL(ib_alloc_fmr); 1158 1159 int ib_unmap_fmr(struct list_head *fmr_list) 1160 { 1161 struct ib_fmr *fmr; 1162 1163 if (list_empty(fmr_list)) 1164 return 0; 1165 1166 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1167 return fmr->device->unmap_fmr(fmr_list); 1168 } 1169 EXPORT_SYMBOL(ib_unmap_fmr); 1170 1171 int ib_dealloc_fmr(struct ib_fmr *fmr) 1172 { 1173 struct ib_pd *pd; 1174 int ret; 1175 1176 pd = fmr->pd; 1177 ret = fmr->device->dealloc_fmr(fmr); 1178 if (!ret) 1179 atomic_dec(&pd->usecnt); 1180 1181 return ret; 1182 } 1183 EXPORT_SYMBOL(ib_dealloc_fmr); 1184 1185 /* Multicast groups */ 1186 1187 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1188 { 1189 int ret; 1190 1191 if (!qp->device->attach_mcast) 1192 return -ENOSYS; 1193 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1194 return -EINVAL; 1195 1196 ret = qp->device->attach_mcast(qp, gid, lid); 1197 if (!ret) 1198 atomic_inc(&qp->usecnt); 1199 return ret; 1200 } 1201 EXPORT_SYMBOL(ib_attach_mcast); 1202 1203 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1204 { 1205 int ret; 1206 1207 if (!qp->device->detach_mcast) 1208 return -ENOSYS; 1209 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1210 return -EINVAL; 1211 1212 ret = qp->device->detach_mcast(qp, gid, lid); 1213 if (!ret) 1214 atomic_dec(&qp->usecnt); 1215 return ret; 1216 } 1217 EXPORT_SYMBOL(ib_detach_mcast); 1218 1219 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) 1220 { 1221 struct ib_xrcd *xrcd; 1222 1223 if (!device->alloc_xrcd) 1224 return ERR_PTR(-ENOSYS); 1225 1226 xrcd = device->alloc_xrcd(device, NULL, NULL); 1227 if (!IS_ERR(xrcd)) { 1228 xrcd->device = device; 1229 xrcd->inode = NULL; 1230 atomic_set(&xrcd->usecnt, 0); 1231 mutex_init(&xrcd->tgt_qp_mutex); 1232 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1233 } 1234 1235 return xrcd; 1236 } 1237 EXPORT_SYMBOL(ib_alloc_xrcd); 1238 1239 int ib_dealloc_xrcd(struct ib_xrcd *xrcd) 1240 { 1241 struct ib_qp *qp; 1242 int ret; 1243 1244 if (atomic_read(&xrcd->usecnt)) 1245 return -EBUSY; 1246 1247 while (!list_empty(&xrcd->tgt_qp_list)) { 1248 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1249 ret = ib_destroy_qp(qp); 1250 if (ret) 1251 return ret; 1252 } 1253 1254 return xrcd->device->dealloc_xrcd(xrcd); 1255 } 1256 EXPORT_SYMBOL(ib_dealloc_xrcd); 1257