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 unsigned long flags; 350 351 spin_lock_irqsave(&qp->device->event_handler_lock, flags); 352 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 353 if (event->element.qp->event_handler) 354 event->element.qp->event_handler(event, event->element.qp->qp_context); 355 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); 356 } 357 358 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 359 { 360 mutex_lock(&xrcd->tgt_qp_mutex); 361 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 362 mutex_unlock(&xrcd->tgt_qp_mutex); 363 } 364 365 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 366 void (*event_handler)(struct ib_event *, void *), 367 void *qp_context) 368 { 369 struct ib_qp *qp; 370 unsigned long flags; 371 372 qp = kzalloc(sizeof *qp, GFP_KERNEL); 373 if (!qp) 374 return ERR_PTR(-ENOMEM); 375 376 qp->real_qp = real_qp; 377 atomic_inc(&real_qp->usecnt); 378 qp->device = real_qp->device; 379 qp->event_handler = event_handler; 380 qp->qp_context = qp_context; 381 qp->qp_num = real_qp->qp_num; 382 qp->qp_type = real_qp->qp_type; 383 384 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 385 list_add(&qp->open_list, &real_qp->open_list); 386 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 387 388 return qp; 389 } 390 391 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 392 struct ib_qp_open_attr *qp_open_attr) 393 { 394 struct ib_qp *qp, *real_qp; 395 396 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 397 return ERR_PTR(-EINVAL); 398 399 qp = ERR_PTR(-EINVAL); 400 mutex_lock(&xrcd->tgt_qp_mutex); 401 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 402 if (real_qp->qp_num == qp_open_attr->qp_num) { 403 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 404 qp_open_attr->qp_context); 405 break; 406 } 407 } 408 mutex_unlock(&xrcd->tgt_qp_mutex); 409 return qp; 410 } 411 EXPORT_SYMBOL(ib_open_qp); 412 413 struct ib_qp *ib_create_qp(struct ib_pd *pd, 414 struct ib_qp_init_attr *qp_init_attr) 415 { 416 struct ib_qp *qp, *real_qp; 417 struct ib_device *device; 418 419 device = pd ? pd->device : qp_init_attr->xrcd->device; 420 qp = device->create_qp(pd, qp_init_attr, NULL); 421 422 if (!IS_ERR(qp)) { 423 qp->device = device; 424 qp->real_qp = qp; 425 qp->uobject = NULL; 426 qp->qp_type = qp_init_attr->qp_type; 427 428 atomic_set(&qp->usecnt, 0); 429 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) { 430 qp->event_handler = __ib_shared_qp_event_handler; 431 qp->qp_context = qp; 432 qp->pd = NULL; 433 qp->send_cq = qp->recv_cq = NULL; 434 qp->srq = NULL; 435 qp->xrcd = qp_init_attr->xrcd; 436 atomic_inc(&qp_init_attr->xrcd->usecnt); 437 INIT_LIST_HEAD(&qp->open_list); 438 439 real_qp = qp; 440 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 441 qp_init_attr->qp_context); 442 if (!IS_ERR(qp)) 443 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 444 else 445 real_qp->device->destroy_qp(real_qp); 446 } else { 447 qp->event_handler = qp_init_attr->event_handler; 448 qp->qp_context = qp_init_attr->qp_context; 449 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 450 qp->recv_cq = NULL; 451 qp->srq = NULL; 452 } else { 453 qp->recv_cq = qp_init_attr->recv_cq; 454 atomic_inc(&qp_init_attr->recv_cq->usecnt); 455 qp->srq = qp_init_attr->srq; 456 if (qp->srq) 457 atomic_inc(&qp_init_attr->srq->usecnt); 458 } 459 460 qp->pd = pd; 461 qp->send_cq = qp_init_attr->send_cq; 462 qp->xrcd = NULL; 463 464 atomic_inc(&pd->usecnt); 465 atomic_inc(&qp_init_attr->send_cq->usecnt); 466 } 467 } 468 469 return qp; 470 } 471 EXPORT_SYMBOL(ib_create_qp); 472 473 static const struct { 474 int valid; 475 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 476 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 477 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 478 [IB_QPS_RESET] = { 479 [IB_QPS_RESET] = { .valid = 1 }, 480 [IB_QPS_INIT] = { 481 .valid = 1, 482 .req_param = { 483 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 484 IB_QP_PORT | 485 IB_QP_QKEY), 486 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 487 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 488 IB_QP_PORT | 489 IB_QP_ACCESS_FLAGS), 490 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 491 IB_QP_PORT | 492 IB_QP_ACCESS_FLAGS), 493 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 494 IB_QP_PORT | 495 IB_QP_ACCESS_FLAGS), 496 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 497 IB_QP_PORT | 498 IB_QP_ACCESS_FLAGS), 499 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 500 IB_QP_QKEY), 501 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 502 IB_QP_QKEY), 503 } 504 }, 505 }, 506 [IB_QPS_INIT] = { 507 [IB_QPS_RESET] = { .valid = 1 }, 508 [IB_QPS_ERR] = { .valid = 1 }, 509 [IB_QPS_INIT] = { 510 .valid = 1, 511 .opt_param = { 512 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 513 IB_QP_PORT | 514 IB_QP_QKEY), 515 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 516 IB_QP_PORT | 517 IB_QP_ACCESS_FLAGS), 518 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 519 IB_QP_PORT | 520 IB_QP_ACCESS_FLAGS), 521 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 522 IB_QP_PORT | 523 IB_QP_ACCESS_FLAGS), 524 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 525 IB_QP_PORT | 526 IB_QP_ACCESS_FLAGS), 527 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 528 IB_QP_QKEY), 529 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 530 IB_QP_QKEY), 531 } 532 }, 533 [IB_QPS_RTR] = { 534 .valid = 1, 535 .req_param = { 536 [IB_QPT_UC] = (IB_QP_AV | 537 IB_QP_PATH_MTU | 538 IB_QP_DEST_QPN | 539 IB_QP_RQ_PSN), 540 [IB_QPT_RC] = (IB_QP_AV | 541 IB_QP_PATH_MTU | 542 IB_QP_DEST_QPN | 543 IB_QP_RQ_PSN | 544 IB_QP_MAX_DEST_RD_ATOMIC | 545 IB_QP_MIN_RNR_TIMER), 546 [IB_QPT_XRC_INI] = (IB_QP_AV | 547 IB_QP_PATH_MTU | 548 IB_QP_DEST_QPN | 549 IB_QP_RQ_PSN), 550 [IB_QPT_XRC_TGT] = (IB_QP_AV | 551 IB_QP_PATH_MTU | 552 IB_QP_DEST_QPN | 553 IB_QP_RQ_PSN | 554 IB_QP_MAX_DEST_RD_ATOMIC | 555 IB_QP_MIN_RNR_TIMER), 556 }, 557 .opt_param = { 558 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 559 IB_QP_QKEY), 560 [IB_QPT_UC] = (IB_QP_ALT_PATH | 561 IB_QP_ACCESS_FLAGS | 562 IB_QP_PKEY_INDEX), 563 [IB_QPT_RC] = (IB_QP_ALT_PATH | 564 IB_QP_ACCESS_FLAGS | 565 IB_QP_PKEY_INDEX), 566 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 567 IB_QP_ACCESS_FLAGS | 568 IB_QP_PKEY_INDEX), 569 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 570 IB_QP_ACCESS_FLAGS | 571 IB_QP_PKEY_INDEX), 572 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 573 IB_QP_QKEY), 574 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 575 IB_QP_QKEY), 576 } 577 } 578 }, 579 [IB_QPS_RTR] = { 580 [IB_QPS_RESET] = { .valid = 1 }, 581 [IB_QPS_ERR] = { .valid = 1 }, 582 [IB_QPS_RTS] = { 583 .valid = 1, 584 .req_param = { 585 [IB_QPT_UD] = IB_QP_SQ_PSN, 586 [IB_QPT_UC] = IB_QP_SQ_PSN, 587 [IB_QPT_RC] = (IB_QP_TIMEOUT | 588 IB_QP_RETRY_CNT | 589 IB_QP_RNR_RETRY | 590 IB_QP_SQ_PSN | 591 IB_QP_MAX_QP_RD_ATOMIC), 592 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 593 IB_QP_RETRY_CNT | 594 IB_QP_RNR_RETRY | 595 IB_QP_SQ_PSN | 596 IB_QP_MAX_QP_RD_ATOMIC), 597 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 598 IB_QP_SQ_PSN), 599 [IB_QPT_SMI] = IB_QP_SQ_PSN, 600 [IB_QPT_GSI] = IB_QP_SQ_PSN, 601 }, 602 .opt_param = { 603 [IB_QPT_UD] = (IB_QP_CUR_STATE | 604 IB_QP_QKEY), 605 [IB_QPT_UC] = (IB_QP_CUR_STATE | 606 IB_QP_ALT_PATH | 607 IB_QP_ACCESS_FLAGS | 608 IB_QP_PATH_MIG_STATE), 609 [IB_QPT_RC] = (IB_QP_CUR_STATE | 610 IB_QP_ALT_PATH | 611 IB_QP_ACCESS_FLAGS | 612 IB_QP_MIN_RNR_TIMER | 613 IB_QP_PATH_MIG_STATE), 614 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 615 IB_QP_ALT_PATH | 616 IB_QP_ACCESS_FLAGS | 617 IB_QP_PATH_MIG_STATE), 618 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 619 IB_QP_ALT_PATH | 620 IB_QP_ACCESS_FLAGS | 621 IB_QP_MIN_RNR_TIMER | 622 IB_QP_PATH_MIG_STATE), 623 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 624 IB_QP_QKEY), 625 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 626 IB_QP_QKEY), 627 } 628 } 629 }, 630 [IB_QPS_RTS] = { 631 [IB_QPS_RESET] = { .valid = 1 }, 632 [IB_QPS_ERR] = { .valid = 1 }, 633 [IB_QPS_RTS] = { 634 .valid = 1, 635 .opt_param = { 636 [IB_QPT_UD] = (IB_QP_CUR_STATE | 637 IB_QP_QKEY), 638 [IB_QPT_UC] = (IB_QP_CUR_STATE | 639 IB_QP_ACCESS_FLAGS | 640 IB_QP_ALT_PATH | 641 IB_QP_PATH_MIG_STATE), 642 [IB_QPT_RC] = (IB_QP_CUR_STATE | 643 IB_QP_ACCESS_FLAGS | 644 IB_QP_ALT_PATH | 645 IB_QP_PATH_MIG_STATE | 646 IB_QP_MIN_RNR_TIMER), 647 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 648 IB_QP_ACCESS_FLAGS | 649 IB_QP_ALT_PATH | 650 IB_QP_PATH_MIG_STATE), 651 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 652 IB_QP_ACCESS_FLAGS | 653 IB_QP_ALT_PATH | 654 IB_QP_PATH_MIG_STATE | 655 IB_QP_MIN_RNR_TIMER), 656 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 657 IB_QP_QKEY), 658 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 659 IB_QP_QKEY), 660 } 661 }, 662 [IB_QPS_SQD] = { 663 .valid = 1, 664 .opt_param = { 665 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 666 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 667 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 668 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 669 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 670 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 671 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 672 } 673 }, 674 }, 675 [IB_QPS_SQD] = { 676 [IB_QPS_RESET] = { .valid = 1 }, 677 [IB_QPS_ERR] = { .valid = 1 }, 678 [IB_QPS_RTS] = { 679 .valid = 1, 680 .opt_param = { 681 [IB_QPT_UD] = (IB_QP_CUR_STATE | 682 IB_QP_QKEY), 683 [IB_QPT_UC] = (IB_QP_CUR_STATE | 684 IB_QP_ALT_PATH | 685 IB_QP_ACCESS_FLAGS | 686 IB_QP_PATH_MIG_STATE), 687 [IB_QPT_RC] = (IB_QP_CUR_STATE | 688 IB_QP_ALT_PATH | 689 IB_QP_ACCESS_FLAGS | 690 IB_QP_MIN_RNR_TIMER | 691 IB_QP_PATH_MIG_STATE), 692 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 693 IB_QP_ALT_PATH | 694 IB_QP_ACCESS_FLAGS | 695 IB_QP_PATH_MIG_STATE), 696 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 697 IB_QP_ALT_PATH | 698 IB_QP_ACCESS_FLAGS | 699 IB_QP_MIN_RNR_TIMER | 700 IB_QP_PATH_MIG_STATE), 701 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 702 IB_QP_QKEY), 703 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 704 IB_QP_QKEY), 705 } 706 }, 707 [IB_QPS_SQD] = { 708 .valid = 1, 709 .opt_param = { 710 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 711 IB_QP_QKEY), 712 [IB_QPT_UC] = (IB_QP_AV | 713 IB_QP_ALT_PATH | 714 IB_QP_ACCESS_FLAGS | 715 IB_QP_PKEY_INDEX | 716 IB_QP_PATH_MIG_STATE), 717 [IB_QPT_RC] = (IB_QP_PORT | 718 IB_QP_AV | 719 IB_QP_TIMEOUT | 720 IB_QP_RETRY_CNT | 721 IB_QP_RNR_RETRY | 722 IB_QP_MAX_QP_RD_ATOMIC | 723 IB_QP_MAX_DEST_RD_ATOMIC | 724 IB_QP_ALT_PATH | 725 IB_QP_ACCESS_FLAGS | 726 IB_QP_PKEY_INDEX | 727 IB_QP_MIN_RNR_TIMER | 728 IB_QP_PATH_MIG_STATE), 729 [IB_QPT_XRC_INI] = (IB_QP_PORT | 730 IB_QP_AV | 731 IB_QP_TIMEOUT | 732 IB_QP_RETRY_CNT | 733 IB_QP_RNR_RETRY | 734 IB_QP_MAX_QP_RD_ATOMIC | 735 IB_QP_ALT_PATH | 736 IB_QP_ACCESS_FLAGS | 737 IB_QP_PKEY_INDEX | 738 IB_QP_PATH_MIG_STATE), 739 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 740 IB_QP_AV | 741 IB_QP_TIMEOUT | 742 IB_QP_MAX_DEST_RD_ATOMIC | 743 IB_QP_ALT_PATH | 744 IB_QP_ACCESS_FLAGS | 745 IB_QP_PKEY_INDEX | 746 IB_QP_MIN_RNR_TIMER | 747 IB_QP_PATH_MIG_STATE), 748 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 749 IB_QP_QKEY), 750 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 751 IB_QP_QKEY), 752 } 753 } 754 }, 755 [IB_QPS_SQE] = { 756 [IB_QPS_RESET] = { .valid = 1 }, 757 [IB_QPS_ERR] = { .valid = 1 }, 758 [IB_QPS_RTS] = { 759 .valid = 1, 760 .opt_param = { 761 [IB_QPT_UD] = (IB_QP_CUR_STATE | 762 IB_QP_QKEY), 763 [IB_QPT_UC] = (IB_QP_CUR_STATE | 764 IB_QP_ACCESS_FLAGS), 765 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 766 IB_QP_QKEY), 767 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 768 IB_QP_QKEY), 769 } 770 } 771 }, 772 [IB_QPS_ERR] = { 773 [IB_QPS_RESET] = { .valid = 1 }, 774 [IB_QPS_ERR] = { .valid = 1 } 775 } 776 }; 777 778 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 779 enum ib_qp_type type, enum ib_qp_attr_mask mask) 780 { 781 enum ib_qp_attr_mask req_param, opt_param; 782 783 if (cur_state < 0 || cur_state > IB_QPS_ERR || 784 next_state < 0 || next_state > IB_QPS_ERR) 785 return 0; 786 787 if (mask & IB_QP_CUR_STATE && 788 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 789 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 790 return 0; 791 792 if (!qp_state_table[cur_state][next_state].valid) 793 return 0; 794 795 req_param = qp_state_table[cur_state][next_state].req_param[type]; 796 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 797 798 if ((mask & req_param) != req_param) 799 return 0; 800 801 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 802 return 0; 803 804 return 1; 805 } 806 EXPORT_SYMBOL(ib_modify_qp_is_ok); 807 808 int ib_modify_qp(struct ib_qp *qp, 809 struct ib_qp_attr *qp_attr, 810 int qp_attr_mask) 811 { 812 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 813 } 814 EXPORT_SYMBOL(ib_modify_qp); 815 816 int ib_query_qp(struct ib_qp *qp, 817 struct ib_qp_attr *qp_attr, 818 int qp_attr_mask, 819 struct ib_qp_init_attr *qp_init_attr) 820 { 821 return qp->device->query_qp ? 822 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 823 -ENOSYS; 824 } 825 EXPORT_SYMBOL(ib_query_qp); 826 827 int ib_close_qp(struct ib_qp *qp) 828 { 829 struct ib_qp *real_qp; 830 unsigned long flags; 831 832 real_qp = qp->real_qp; 833 if (real_qp == qp) 834 return -EINVAL; 835 836 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 837 list_del(&qp->open_list); 838 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 839 840 atomic_dec(&real_qp->usecnt); 841 kfree(qp); 842 843 return 0; 844 } 845 EXPORT_SYMBOL(ib_close_qp); 846 847 static int __ib_destroy_shared_qp(struct ib_qp *qp) 848 { 849 struct ib_xrcd *xrcd; 850 struct ib_qp *real_qp; 851 int ret; 852 853 real_qp = qp->real_qp; 854 xrcd = real_qp->xrcd; 855 856 mutex_lock(&xrcd->tgt_qp_mutex); 857 ib_close_qp(qp); 858 if (atomic_read(&real_qp->usecnt) == 0) 859 list_del(&real_qp->xrcd_list); 860 else 861 real_qp = NULL; 862 mutex_unlock(&xrcd->tgt_qp_mutex); 863 864 if (real_qp) { 865 ret = ib_destroy_qp(real_qp); 866 if (!ret) 867 atomic_dec(&xrcd->usecnt); 868 else 869 __ib_insert_xrcd_qp(xrcd, real_qp); 870 } 871 872 return 0; 873 } 874 875 int ib_destroy_qp(struct ib_qp *qp) 876 { 877 struct ib_pd *pd; 878 struct ib_cq *scq, *rcq; 879 struct ib_srq *srq; 880 int ret; 881 882 if (atomic_read(&qp->usecnt)) 883 return -EBUSY; 884 885 if (qp->real_qp != qp) 886 return __ib_destroy_shared_qp(qp); 887 888 pd = qp->pd; 889 scq = qp->send_cq; 890 rcq = qp->recv_cq; 891 srq = qp->srq; 892 893 ret = qp->device->destroy_qp(qp); 894 if (!ret) { 895 if (pd) 896 atomic_dec(&pd->usecnt); 897 if (scq) 898 atomic_dec(&scq->usecnt); 899 if (rcq) 900 atomic_dec(&rcq->usecnt); 901 if (srq) 902 atomic_dec(&srq->usecnt); 903 } 904 905 return ret; 906 } 907 EXPORT_SYMBOL(ib_destroy_qp); 908 909 /* Completion queues */ 910 911 struct ib_cq *ib_create_cq(struct ib_device *device, 912 ib_comp_handler comp_handler, 913 void (*event_handler)(struct ib_event *, void *), 914 void *cq_context, int cqe, int comp_vector) 915 { 916 struct ib_cq *cq; 917 918 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL); 919 920 if (!IS_ERR(cq)) { 921 cq->device = device; 922 cq->uobject = NULL; 923 cq->comp_handler = comp_handler; 924 cq->event_handler = event_handler; 925 cq->cq_context = cq_context; 926 atomic_set(&cq->usecnt, 0); 927 } 928 929 return cq; 930 } 931 EXPORT_SYMBOL(ib_create_cq); 932 933 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 934 { 935 return cq->device->modify_cq ? 936 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS; 937 } 938 EXPORT_SYMBOL(ib_modify_cq); 939 940 int ib_destroy_cq(struct ib_cq *cq) 941 { 942 if (atomic_read(&cq->usecnt)) 943 return -EBUSY; 944 945 return cq->device->destroy_cq(cq); 946 } 947 EXPORT_SYMBOL(ib_destroy_cq); 948 949 int ib_resize_cq(struct ib_cq *cq, int cqe) 950 { 951 return cq->device->resize_cq ? 952 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 953 } 954 EXPORT_SYMBOL(ib_resize_cq); 955 956 /* Memory regions */ 957 958 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) 959 { 960 struct ib_mr *mr; 961 962 mr = pd->device->get_dma_mr(pd, mr_access_flags); 963 964 if (!IS_ERR(mr)) { 965 mr->device = pd->device; 966 mr->pd = pd; 967 mr->uobject = NULL; 968 atomic_inc(&pd->usecnt); 969 atomic_set(&mr->usecnt, 0); 970 } 971 972 return mr; 973 } 974 EXPORT_SYMBOL(ib_get_dma_mr); 975 976 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, 977 struct ib_phys_buf *phys_buf_array, 978 int num_phys_buf, 979 int mr_access_flags, 980 u64 *iova_start) 981 { 982 struct ib_mr *mr; 983 984 if (!pd->device->reg_phys_mr) 985 return ERR_PTR(-ENOSYS); 986 987 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, 988 mr_access_flags, iova_start); 989 990 if (!IS_ERR(mr)) { 991 mr->device = pd->device; 992 mr->pd = pd; 993 mr->uobject = NULL; 994 atomic_inc(&pd->usecnt); 995 atomic_set(&mr->usecnt, 0); 996 } 997 998 return mr; 999 } 1000 EXPORT_SYMBOL(ib_reg_phys_mr); 1001 1002 int ib_rereg_phys_mr(struct ib_mr *mr, 1003 int mr_rereg_mask, 1004 struct ib_pd *pd, 1005 struct ib_phys_buf *phys_buf_array, 1006 int num_phys_buf, 1007 int mr_access_flags, 1008 u64 *iova_start) 1009 { 1010 struct ib_pd *old_pd; 1011 int ret; 1012 1013 if (!mr->device->rereg_phys_mr) 1014 return -ENOSYS; 1015 1016 if (atomic_read(&mr->usecnt)) 1017 return -EBUSY; 1018 1019 old_pd = mr->pd; 1020 1021 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, 1022 phys_buf_array, num_phys_buf, 1023 mr_access_flags, iova_start); 1024 1025 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { 1026 atomic_dec(&old_pd->usecnt); 1027 atomic_inc(&pd->usecnt); 1028 } 1029 1030 return ret; 1031 } 1032 EXPORT_SYMBOL(ib_rereg_phys_mr); 1033 1034 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) 1035 { 1036 return mr->device->query_mr ? 1037 mr->device->query_mr(mr, mr_attr) : -ENOSYS; 1038 } 1039 EXPORT_SYMBOL(ib_query_mr); 1040 1041 int ib_dereg_mr(struct ib_mr *mr) 1042 { 1043 struct ib_pd *pd; 1044 int ret; 1045 1046 if (atomic_read(&mr->usecnt)) 1047 return -EBUSY; 1048 1049 pd = mr->pd; 1050 ret = mr->device->dereg_mr(mr); 1051 if (!ret) 1052 atomic_dec(&pd->usecnt); 1053 1054 return ret; 1055 } 1056 EXPORT_SYMBOL(ib_dereg_mr); 1057 1058 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len) 1059 { 1060 struct ib_mr *mr; 1061 1062 if (!pd->device->alloc_fast_reg_mr) 1063 return ERR_PTR(-ENOSYS); 1064 1065 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len); 1066 1067 if (!IS_ERR(mr)) { 1068 mr->device = pd->device; 1069 mr->pd = pd; 1070 mr->uobject = NULL; 1071 atomic_inc(&pd->usecnt); 1072 atomic_set(&mr->usecnt, 0); 1073 } 1074 1075 return mr; 1076 } 1077 EXPORT_SYMBOL(ib_alloc_fast_reg_mr); 1078 1079 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device, 1080 int max_page_list_len) 1081 { 1082 struct ib_fast_reg_page_list *page_list; 1083 1084 if (!device->alloc_fast_reg_page_list) 1085 return ERR_PTR(-ENOSYS); 1086 1087 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len); 1088 1089 if (!IS_ERR(page_list)) { 1090 page_list->device = device; 1091 page_list->max_page_list_len = max_page_list_len; 1092 } 1093 1094 return page_list; 1095 } 1096 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list); 1097 1098 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) 1099 { 1100 page_list->device->free_fast_reg_page_list(page_list); 1101 } 1102 EXPORT_SYMBOL(ib_free_fast_reg_page_list); 1103 1104 /* Memory windows */ 1105 1106 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) 1107 { 1108 struct ib_mw *mw; 1109 1110 if (!pd->device->alloc_mw) 1111 return ERR_PTR(-ENOSYS); 1112 1113 mw = pd->device->alloc_mw(pd, type); 1114 if (!IS_ERR(mw)) { 1115 mw->device = pd->device; 1116 mw->pd = pd; 1117 mw->uobject = NULL; 1118 mw->type = type; 1119 atomic_inc(&pd->usecnt); 1120 } 1121 1122 return mw; 1123 } 1124 EXPORT_SYMBOL(ib_alloc_mw); 1125 1126 int ib_dealloc_mw(struct ib_mw *mw) 1127 { 1128 struct ib_pd *pd; 1129 int ret; 1130 1131 pd = mw->pd; 1132 ret = mw->device->dealloc_mw(mw); 1133 if (!ret) 1134 atomic_dec(&pd->usecnt); 1135 1136 return ret; 1137 } 1138 EXPORT_SYMBOL(ib_dealloc_mw); 1139 1140 /* "Fast" memory regions */ 1141 1142 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1143 int mr_access_flags, 1144 struct ib_fmr_attr *fmr_attr) 1145 { 1146 struct ib_fmr *fmr; 1147 1148 if (!pd->device->alloc_fmr) 1149 return ERR_PTR(-ENOSYS); 1150 1151 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1152 if (!IS_ERR(fmr)) { 1153 fmr->device = pd->device; 1154 fmr->pd = pd; 1155 atomic_inc(&pd->usecnt); 1156 } 1157 1158 return fmr; 1159 } 1160 EXPORT_SYMBOL(ib_alloc_fmr); 1161 1162 int ib_unmap_fmr(struct list_head *fmr_list) 1163 { 1164 struct ib_fmr *fmr; 1165 1166 if (list_empty(fmr_list)) 1167 return 0; 1168 1169 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1170 return fmr->device->unmap_fmr(fmr_list); 1171 } 1172 EXPORT_SYMBOL(ib_unmap_fmr); 1173 1174 int ib_dealloc_fmr(struct ib_fmr *fmr) 1175 { 1176 struct ib_pd *pd; 1177 int ret; 1178 1179 pd = fmr->pd; 1180 ret = fmr->device->dealloc_fmr(fmr); 1181 if (!ret) 1182 atomic_dec(&pd->usecnt); 1183 1184 return ret; 1185 } 1186 EXPORT_SYMBOL(ib_dealloc_fmr); 1187 1188 /* Multicast groups */ 1189 1190 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1191 { 1192 int ret; 1193 1194 if (!qp->device->attach_mcast) 1195 return -ENOSYS; 1196 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1197 return -EINVAL; 1198 1199 ret = qp->device->attach_mcast(qp, gid, lid); 1200 if (!ret) 1201 atomic_inc(&qp->usecnt); 1202 return ret; 1203 } 1204 EXPORT_SYMBOL(ib_attach_mcast); 1205 1206 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1207 { 1208 int ret; 1209 1210 if (!qp->device->detach_mcast) 1211 return -ENOSYS; 1212 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1213 return -EINVAL; 1214 1215 ret = qp->device->detach_mcast(qp, gid, lid); 1216 if (!ret) 1217 atomic_dec(&qp->usecnt); 1218 return ret; 1219 } 1220 EXPORT_SYMBOL(ib_detach_mcast); 1221 1222 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) 1223 { 1224 struct ib_xrcd *xrcd; 1225 1226 if (!device->alloc_xrcd) 1227 return ERR_PTR(-ENOSYS); 1228 1229 xrcd = device->alloc_xrcd(device, NULL, NULL); 1230 if (!IS_ERR(xrcd)) { 1231 xrcd->device = device; 1232 xrcd->inode = NULL; 1233 atomic_set(&xrcd->usecnt, 0); 1234 mutex_init(&xrcd->tgt_qp_mutex); 1235 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1236 } 1237 1238 return xrcd; 1239 } 1240 EXPORT_SYMBOL(ib_alloc_xrcd); 1241 1242 int ib_dealloc_xrcd(struct ib_xrcd *xrcd) 1243 { 1244 struct ib_qp *qp; 1245 int ret; 1246 1247 if (atomic_read(&xrcd->usecnt)) 1248 return -EBUSY; 1249 1250 while (!list_empty(&xrcd->tgt_qp_list)) { 1251 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1252 ret = ib_destroy_qp(qp); 1253 if (ret) 1254 return ret; 1255 } 1256 1257 return xrcd->device->dealloc_xrcd(xrcd); 1258 } 1259 EXPORT_SYMBOL(ib_dealloc_xrcd); 1260 1261 struct ib_flow *ib_create_flow(struct ib_qp *qp, 1262 struct ib_flow_attr *flow_attr, 1263 int domain) 1264 { 1265 struct ib_flow *flow_id; 1266 if (!qp->device->create_flow) 1267 return ERR_PTR(-ENOSYS); 1268 1269 flow_id = qp->device->create_flow(qp, flow_attr, domain); 1270 if (!IS_ERR(flow_id)) 1271 atomic_inc(&qp->usecnt); 1272 return flow_id; 1273 } 1274 EXPORT_SYMBOL(ib_create_flow); 1275 1276 int ib_destroy_flow(struct ib_flow *flow_id) 1277 { 1278 int err; 1279 struct ib_qp *qp = flow_id->qp; 1280 1281 err = qp->device->destroy_flow(flow_id); 1282 if (!err) 1283 atomic_dec(&qp->usecnt); 1284 return err; 1285 } 1286 EXPORT_SYMBOL(ib_destroy_flow); 1287