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 #include <rdma/ib_addr.h> 48 49 #include "core_priv.h" 50 51 int ib_rate_to_mult(enum ib_rate rate) 52 { 53 switch (rate) { 54 case IB_RATE_2_5_GBPS: return 1; 55 case IB_RATE_5_GBPS: return 2; 56 case IB_RATE_10_GBPS: return 4; 57 case IB_RATE_20_GBPS: return 8; 58 case IB_RATE_30_GBPS: return 12; 59 case IB_RATE_40_GBPS: return 16; 60 case IB_RATE_60_GBPS: return 24; 61 case IB_RATE_80_GBPS: return 32; 62 case IB_RATE_120_GBPS: return 48; 63 default: return -1; 64 } 65 } 66 EXPORT_SYMBOL(ib_rate_to_mult); 67 68 enum ib_rate mult_to_ib_rate(int mult) 69 { 70 switch (mult) { 71 case 1: return IB_RATE_2_5_GBPS; 72 case 2: return IB_RATE_5_GBPS; 73 case 4: return IB_RATE_10_GBPS; 74 case 8: return IB_RATE_20_GBPS; 75 case 12: return IB_RATE_30_GBPS; 76 case 16: return IB_RATE_40_GBPS; 77 case 24: return IB_RATE_60_GBPS; 78 case 32: return IB_RATE_80_GBPS; 79 case 48: return IB_RATE_120_GBPS; 80 default: return IB_RATE_PORT_CURRENT; 81 } 82 } 83 EXPORT_SYMBOL(mult_to_ib_rate); 84 85 int ib_rate_to_mbps(enum ib_rate rate) 86 { 87 switch (rate) { 88 case IB_RATE_2_5_GBPS: return 2500; 89 case IB_RATE_5_GBPS: return 5000; 90 case IB_RATE_10_GBPS: return 10000; 91 case IB_RATE_20_GBPS: return 20000; 92 case IB_RATE_30_GBPS: return 30000; 93 case IB_RATE_40_GBPS: return 40000; 94 case IB_RATE_60_GBPS: return 60000; 95 case IB_RATE_80_GBPS: return 80000; 96 case IB_RATE_120_GBPS: return 120000; 97 case IB_RATE_14_GBPS: return 14062; 98 case IB_RATE_56_GBPS: return 56250; 99 case IB_RATE_112_GBPS: return 112500; 100 case IB_RATE_168_GBPS: return 168750; 101 case IB_RATE_25_GBPS: return 25781; 102 case IB_RATE_100_GBPS: return 103125; 103 case IB_RATE_200_GBPS: return 206250; 104 case IB_RATE_300_GBPS: return 309375; 105 default: return -1; 106 } 107 } 108 EXPORT_SYMBOL(ib_rate_to_mbps); 109 110 enum rdma_transport_type 111 rdma_node_get_transport(enum rdma_node_type node_type) 112 { 113 switch (node_type) { 114 case RDMA_NODE_IB_CA: 115 case RDMA_NODE_IB_SWITCH: 116 case RDMA_NODE_IB_ROUTER: 117 return RDMA_TRANSPORT_IB; 118 case RDMA_NODE_RNIC: 119 return RDMA_TRANSPORT_IWARP; 120 case RDMA_NODE_USNIC: 121 return RDMA_TRANSPORT_USNIC; 122 case RDMA_NODE_USNIC_UDP: 123 return RDMA_TRANSPORT_USNIC_UDP; 124 default: 125 BUG(); 126 return 0; 127 } 128 } 129 EXPORT_SYMBOL(rdma_node_get_transport); 130 131 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num) 132 { 133 if (device->get_link_layer) 134 return device->get_link_layer(device, port_num); 135 136 switch (rdma_node_get_transport(device->node_type)) { 137 case RDMA_TRANSPORT_IB: 138 return IB_LINK_LAYER_INFINIBAND; 139 case RDMA_TRANSPORT_IWARP: 140 case RDMA_TRANSPORT_USNIC: 141 case RDMA_TRANSPORT_USNIC_UDP: 142 return IB_LINK_LAYER_ETHERNET; 143 default: 144 return IB_LINK_LAYER_UNSPECIFIED; 145 } 146 } 147 EXPORT_SYMBOL(rdma_port_get_link_layer); 148 149 /* Protection domains */ 150 151 struct ib_pd *ib_alloc_pd(struct ib_device *device) 152 { 153 struct ib_pd *pd; 154 155 pd = device->alloc_pd(device, NULL, NULL); 156 157 if (!IS_ERR(pd)) { 158 pd->device = device; 159 pd->uobject = NULL; 160 atomic_set(&pd->usecnt, 0); 161 } 162 163 return pd; 164 } 165 EXPORT_SYMBOL(ib_alloc_pd); 166 167 int ib_dealloc_pd(struct ib_pd *pd) 168 { 169 if (atomic_read(&pd->usecnt)) 170 return -EBUSY; 171 172 return pd->device->dealloc_pd(pd); 173 } 174 EXPORT_SYMBOL(ib_dealloc_pd); 175 176 /* Address handles */ 177 178 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 179 { 180 struct ib_ah *ah; 181 182 ah = pd->device->create_ah(pd, ah_attr); 183 184 if (!IS_ERR(ah)) { 185 ah->device = pd->device; 186 ah->pd = pd; 187 ah->uobject = NULL; 188 atomic_inc(&pd->usecnt); 189 } 190 191 return ah; 192 } 193 EXPORT_SYMBOL(ib_create_ah); 194 195 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc, 196 struct ib_grh *grh, struct ib_ah_attr *ah_attr) 197 { 198 u32 flow_class; 199 u16 gid_index; 200 int ret; 201 int is_eth = (rdma_port_get_link_layer(device, port_num) == 202 IB_LINK_LAYER_ETHERNET); 203 204 memset(ah_attr, 0, sizeof *ah_attr); 205 if (is_eth) { 206 if (!(wc->wc_flags & IB_WC_GRH)) 207 return -EPROTOTYPE; 208 209 if (wc->wc_flags & IB_WC_WITH_SMAC && 210 wc->wc_flags & IB_WC_WITH_VLAN) { 211 memcpy(ah_attr->dmac, wc->smac, ETH_ALEN); 212 ah_attr->vlan_id = wc->vlan_id; 213 } else { 214 ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid, 215 ah_attr->dmac, &ah_attr->vlan_id); 216 if (ret) 217 return ret; 218 } 219 } else { 220 ah_attr->vlan_id = 0xffff; 221 } 222 223 ah_attr->dlid = wc->slid; 224 ah_attr->sl = wc->sl; 225 ah_attr->src_path_bits = wc->dlid_path_bits; 226 ah_attr->port_num = port_num; 227 228 if (wc->wc_flags & IB_WC_GRH) { 229 ah_attr->ah_flags = IB_AH_GRH; 230 ah_attr->grh.dgid = grh->sgid; 231 232 ret = ib_find_cached_gid(device, &grh->dgid, &port_num, 233 &gid_index); 234 if (ret) 235 return ret; 236 237 ah_attr->grh.sgid_index = (u8) gid_index; 238 flow_class = be32_to_cpu(grh->version_tclass_flow); 239 ah_attr->grh.flow_label = flow_class & 0xFFFFF; 240 ah_attr->grh.hop_limit = 0xFF; 241 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF; 242 } 243 return 0; 244 } 245 EXPORT_SYMBOL(ib_init_ah_from_wc); 246 247 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc, 248 struct ib_grh *grh, u8 port_num) 249 { 250 struct ib_ah_attr ah_attr; 251 int ret; 252 253 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr); 254 if (ret) 255 return ERR_PTR(ret); 256 257 return ib_create_ah(pd, &ah_attr); 258 } 259 EXPORT_SYMBOL(ib_create_ah_from_wc); 260 261 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 262 { 263 return ah->device->modify_ah ? 264 ah->device->modify_ah(ah, ah_attr) : 265 -ENOSYS; 266 } 267 EXPORT_SYMBOL(ib_modify_ah); 268 269 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 270 { 271 return ah->device->query_ah ? 272 ah->device->query_ah(ah, ah_attr) : 273 -ENOSYS; 274 } 275 EXPORT_SYMBOL(ib_query_ah); 276 277 int ib_destroy_ah(struct ib_ah *ah) 278 { 279 struct ib_pd *pd; 280 int ret; 281 282 pd = ah->pd; 283 ret = ah->device->destroy_ah(ah); 284 if (!ret) 285 atomic_dec(&pd->usecnt); 286 287 return ret; 288 } 289 EXPORT_SYMBOL(ib_destroy_ah); 290 291 /* Shared receive queues */ 292 293 struct ib_srq *ib_create_srq(struct ib_pd *pd, 294 struct ib_srq_init_attr *srq_init_attr) 295 { 296 struct ib_srq *srq; 297 298 if (!pd->device->create_srq) 299 return ERR_PTR(-ENOSYS); 300 301 srq = pd->device->create_srq(pd, srq_init_attr, NULL); 302 303 if (!IS_ERR(srq)) { 304 srq->device = pd->device; 305 srq->pd = pd; 306 srq->uobject = NULL; 307 srq->event_handler = srq_init_attr->event_handler; 308 srq->srq_context = srq_init_attr->srq_context; 309 srq->srq_type = srq_init_attr->srq_type; 310 if (srq->srq_type == IB_SRQT_XRC) { 311 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 312 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq; 313 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 314 atomic_inc(&srq->ext.xrc.cq->usecnt); 315 } 316 atomic_inc(&pd->usecnt); 317 atomic_set(&srq->usecnt, 0); 318 } 319 320 return srq; 321 } 322 EXPORT_SYMBOL(ib_create_srq); 323 324 int ib_modify_srq(struct ib_srq *srq, 325 struct ib_srq_attr *srq_attr, 326 enum ib_srq_attr_mask srq_attr_mask) 327 { 328 return srq->device->modify_srq ? 329 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 330 -ENOSYS; 331 } 332 EXPORT_SYMBOL(ib_modify_srq); 333 334 int ib_query_srq(struct ib_srq *srq, 335 struct ib_srq_attr *srq_attr) 336 { 337 return srq->device->query_srq ? 338 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 339 } 340 EXPORT_SYMBOL(ib_query_srq); 341 342 int ib_destroy_srq(struct ib_srq *srq) 343 { 344 struct ib_pd *pd; 345 enum ib_srq_type srq_type; 346 struct ib_xrcd *uninitialized_var(xrcd); 347 struct ib_cq *uninitialized_var(cq); 348 int ret; 349 350 if (atomic_read(&srq->usecnt)) 351 return -EBUSY; 352 353 pd = srq->pd; 354 srq_type = srq->srq_type; 355 if (srq_type == IB_SRQT_XRC) { 356 xrcd = srq->ext.xrc.xrcd; 357 cq = srq->ext.xrc.cq; 358 } 359 360 ret = srq->device->destroy_srq(srq); 361 if (!ret) { 362 atomic_dec(&pd->usecnt); 363 if (srq_type == IB_SRQT_XRC) { 364 atomic_dec(&xrcd->usecnt); 365 atomic_dec(&cq->usecnt); 366 } 367 } 368 369 return ret; 370 } 371 EXPORT_SYMBOL(ib_destroy_srq); 372 373 /* Queue pairs */ 374 375 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 376 { 377 struct ib_qp *qp = context; 378 unsigned long flags; 379 380 spin_lock_irqsave(&qp->device->event_handler_lock, flags); 381 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 382 if (event->element.qp->event_handler) 383 event->element.qp->event_handler(event, event->element.qp->qp_context); 384 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); 385 } 386 387 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 388 { 389 mutex_lock(&xrcd->tgt_qp_mutex); 390 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 391 mutex_unlock(&xrcd->tgt_qp_mutex); 392 } 393 394 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 395 void (*event_handler)(struct ib_event *, void *), 396 void *qp_context) 397 { 398 struct ib_qp *qp; 399 unsigned long flags; 400 401 qp = kzalloc(sizeof *qp, GFP_KERNEL); 402 if (!qp) 403 return ERR_PTR(-ENOMEM); 404 405 qp->real_qp = real_qp; 406 atomic_inc(&real_qp->usecnt); 407 qp->device = real_qp->device; 408 qp->event_handler = event_handler; 409 qp->qp_context = qp_context; 410 qp->qp_num = real_qp->qp_num; 411 qp->qp_type = real_qp->qp_type; 412 413 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 414 list_add(&qp->open_list, &real_qp->open_list); 415 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 416 417 return qp; 418 } 419 420 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 421 struct ib_qp_open_attr *qp_open_attr) 422 { 423 struct ib_qp *qp, *real_qp; 424 425 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 426 return ERR_PTR(-EINVAL); 427 428 qp = ERR_PTR(-EINVAL); 429 mutex_lock(&xrcd->tgt_qp_mutex); 430 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 431 if (real_qp->qp_num == qp_open_attr->qp_num) { 432 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 433 qp_open_attr->qp_context); 434 break; 435 } 436 } 437 mutex_unlock(&xrcd->tgt_qp_mutex); 438 return qp; 439 } 440 EXPORT_SYMBOL(ib_open_qp); 441 442 struct ib_qp *ib_create_qp(struct ib_pd *pd, 443 struct ib_qp_init_attr *qp_init_attr) 444 { 445 struct ib_qp *qp, *real_qp; 446 struct ib_device *device; 447 448 device = pd ? pd->device : qp_init_attr->xrcd->device; 449 qp = device->create_qp(pd, qp_init_attr, NULL); 450 451 if (!IS_ERR(qp)) { 452 qp->device = device; 453 qp->real_qp = qp; 454 qp->uobject = NULL; 455 qp->qp_type = qp_init_attr->qp_type; 456 457 atomic_set(&qp->usecnt, 0); 458 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) { 459 qp->event_handler = __ib_shared_qp_event_handler; 460 qp->qp_context = qp; 461 qp->pd = NULL; 462 qp->send_cq = qp->recv_cq = NULL; 463 qp->srq = NULL; 464 qp->xrcd = qp_init_attr->xrcd; 465 atomic_inc(&qp_init_attr->xrcd->usecnt); 466 INIT_LIST_HEAD(&qp->open_list); 467 468 real_qp = qp; 469 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 470 qp_init_attr->qp_context); 471 if (!IS_ERR(qp)) 472 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 473 else 474 real_qp->device->destroy_qp(real_qp); 475 } else { 476 qp->event_handler = qp_init_attr->event_handler; 477 qp->qp_context = qp_init_attr->qp_context; 478 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 479 qp->recv_cq = NULL; 480 qp->srq = NULL; 481 } else { 482 qp->recv_cq = qp_init_attr->recv_cq; 483 atomic_inc(&qp_init_attr->recv_cq->usecnt); 484 qp->srq = qp_init_attr->srq; 485 if (qp->srq) 486 atomic_inc(&qp_init_attr->srq->usecnt); 487 } 488 489 qp->pd = pd; 490 qp->send_cq = qp_init_attr->send_cq; 491 qp->xrcd = NULL; 492 493 atomic_inc(&pd->usecnt); 494 atomic_inc(&qp_init_attr->send_cq->usecnt); 495 } 496 } 497 498 return qp; 499 } 500 EXPORT_SYMBOL(ib_create_qp); 501 502 static const struct { 503 int valid; 504 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 505 enum ib_qp_attr_mask req_param_add_eth[IB_QPT_MAX]; 506 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 507 enum ib_qp_attr_mask opt_param_add_eth[IB_QPT_MAX]; 508 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 509 [IB_QPS_RESET] = { 510 [IB_QPS_RESET] = { .valid = 1 }, 511 [IB_QPS_INIT] = { 512 .valid = 1, 513 .req_param = { 514 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 515 IB_QP_PORT | 516 IB_QP_QKEY), 517 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 518 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 519 IB_QP_PORT | 520 IB_QP_ACCESS_FLAGS), 521 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 522 IB_QP_PORT | 523 IB_QP_ACCESS_FLAGS), 524 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 525 IB_QP_PORT | 526 IB_QP_ACCESS_FLAGS), 527 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 528 IB_QP_PORT | 529 IB_QP_ACCESS_FLAGS), 530 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 531 IB_QP_QKEY), 532 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 533 IB_QP_QKEY), 534 } 535 }, 536 }, 537 [IB_QPS_INIT] = { 538 [IB_QPS_RESET] = { .valid = 1 }, 539 [IB_QPS_ERR] = { .valid = 1 }, 540 [IB_QPS_INIT] = { 541 .valid = 1, 542 .opt_param = { 543 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 544 IB_QP_PORT | 545 IB_QP_QKEY), 546 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 547 IB_QP_PORT | 548 IB_QP_ACCESS_FLAGS), 549 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 550 IB_QP_PORT | 551 IB_QP_ACCESS_FLAGS), 552 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 553 IB_QP_PORT | 554 IB_QP_ACCESS_FLAGS), 555 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 556 IB_QP_PORT | 557 IB_QP_ACCESS_FLAGS), 558 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 559 IB_QP_QKEY), 560 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 561 IB_QP_QKEY), 562 } 563 }, 564 [IB_QPS_RTR] = { 565 .valid = 1, 566 .req_param = { 567 [IB_QPT_UC] = (IB_QP_AV | 568 IB_QP_PATH_MTU | 569 IB_QP_DEST_QPN | 570 IB_QP_RQ_PSN), 571 [IB_QPT_RC] = (IB_QP_AV | 572 IB_QP_PATH_MTU | 573 IB_QP_DEST_QPN | 574 IB_QP_RQ_PSN | 575 IB_QP_MAX_DEST_RD_ATOMIC | 576 IB_QP_MIN_RNR_TIMER), 577 [IB_QPT_XRC_INI] = (IB_QP_AV | 578 IB_QP_PATH_MTU | 579 IB_QP_DEST_QPN | 580 IB_QP_RQ_PSN), 581 [IB_QPT_XRC_TGT] = (IB_QP_AV | 582 IB_QP_PATH_MTU | 583 IB_QP_DEST_QPN | 584 IB_QP_RQ_PSN | 585 IB_QP_MAX_DEST_RD_ATOMIC | 586 IB_QP_MIN_RNR_TIMER), 587 }, 588 .req_param_add_eth = { 589 [IB_QPT_RC] = (IB_QP_SMAC), 590 [IB_QPT_UC] = (IB_QP_SMAC), 591 [IB_QPT_XRC_INI] = (IB_QP_SMAC), 592 [IB_QPT_XRC_TGT] = (IB_QP_SMAC) 593 }, 594 .opt_param = { 595 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 596 IB_QP_QKEY), 597 [IB_QPT_UC] = (IB_QP_ALT_PATH | 598 IB_QP_ACCESS_FLAGS | 599 IB_QP_PKEY_INDEX), 600 [IB_QPT_RC] = (IB_QP_ALT_PATH | 601 IB_QP_ACCESS_FLAGS | 602 IB_QP_PKEY_INDEX), 603 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 604 IB_QP_ACCESS_FLAGS | 605 IB_QP_PKEY_INDEX), 606 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 607 IB_QP_ACCESS_FLAGS | 608 IB_QP_PKEY_INDEX), 609 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 610 IB_QP_QKEY), 611 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 612 IB_QP_QKEY), 613 }, 614 .opt_param_add_eth = { 615 [IB_QPT_RC] = (IB_QP_ALT_SMAC | 616 IB_QP_VID | 617 IB_QP_ALT_VID), 618 [IB_QPT_UC] = (IB_QP_ALT_SMAC | 619 IB_QP_VID | 620 IB_QP_ALT_VID), 621 [IB_QPT_XRC_INI] = (IB_QP_ALT_SMAC | 622 IB_QP_VID | 623 IB_QP_ALT_VID), 624 [IB_QPT_XRC_TGT] = (IB_QP_ALT_SMAC | 625 IB_QP_VID | 626 IB_QP_ALT_VID) 627 } 628 } 629 }, 630 [IB_QPS_RTR] = { 631 [IB_QPS_RESET] = { .valid = 1 }, 632 [IB_QPS_ERR] = { .valid = 1 }, 633 [IB_QPS_RTS] = { 634 .valid = 1, 635 .req_param = { 636 [IB_QPT_UD] = IB_QP_SQ_PSN, 637 [IB_QPT_UC] = IB_QP_SQ_PSN, 638 [IB_QPT_RC] = (IB_QP_TIMEOUT | 639 IB_QP_RETRY_CNT | 640 IB_QP_RNR_RETRY | 641 IB_QP_SQ_PSN | 642 IB_QP_MAX_QP_RD_ATOMIC), 643 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 644 IB_QP_RETRY_CNT | 645 IB_QP_RNR_RETRY | 646 IB_QP_SQ_PSN | 647 IB_QP_MAX_QP_RD_ATOMIC), 648 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 649 IB_QP_SQ_PSN), 650 [IB_QPT_SMI] = IB_QP_SQ_PSN, 651 [IB_QPT_GSI] = IB_QP_SQ_PSN, 652 }, 653 .opt_param = { 654 [IB_QPT_UD] = (IB_QP_CUR_STATE | 655 IB_QP_QKEY), 656 [IB_QPT_UC] = (IB_QP_CUR_STATE | 657 IB_QP_ALT_PATH | 658 IB_QP_ACCESS_FLAGS | 659 IB_QP_PATH_MIG_STATE), 660 [IB_QPT_RC] = (IB_QP_CUR_STATE | 661 IB_QP_ALT_PATH | 662 IB_QP_ACCESS_FLAGS | 663 IB_QP_MIN_RNR_TIMER | 664 IB_QP_PATH_MIG_STATE), 665 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 666 IB_QP_ALT_PATH | 667 IB_QP_ACCESS_FLAGS | 668 IB_QP_PATH_MIG_STATE), 669 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 670 IB_QP_ALT_PATH | 671 IB_QP_ACCESS_FLAGS | 672 IB_QP_MIN_RNR_TIMER | 673 IB_QP_PATH_MIG_STATE), 674 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 675 IB_QP_QKEY), 676 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 677 IB_QP_QKEY), 678 } 679 } 680 }, 681 [IB_QPS_RTS] = { 682 [IB_QPS_RESET] = { .valid = 1 }, 683 [IB_QPS_ERR] = { .valid = 1 }, 684 [IB_QPS_RTS] = { 685 .valid = 1, 686 .opt_param = { 687 [IB_QPT_UD] = (IB_QP_CUR_STATE | 688 IB_QP_QKEY), 689 [IB_QPT_UC] = (IB_QP_CUR_STATE | 690 IB_QP_ACCESS_FLAGS | 691 IB_QP_ALT_PATH | 692 IB_QP_PATH_MIG_STATE), 693 [IB_QPT_RC] = (IB_QP_CUR_STATE | 694 IB_QP_ACCESS_FLAGS | 695 IB_QP_ALT_PATH | 696 IB_QP_PATH_MIG_STATE | 697 IB_QP_MIN_RNR_TIMER), 698 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 699 IB_QP_ACCESS_FLAGS | 700 IB_QP_ALT_PATH | 701 IB_QP_PATH_MIG_STATE), 702 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 703 IB_QP_ACCESS_FLAGS | 704 IB_QP_ALT_PATH | 705 IB_QP_PATH_MIG_STATE | 706 IB_QP_MIN_RNR_TIMER), 707 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 708 IB_QP_QKEY), 709 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 710 IB_QP_QKEY), 711 } 712 }, 713 [IB_QPS_SQD] = { 714 .valid = 1, 715 .opt_param = { 716 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 717 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 718 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 719 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 720 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 721 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 722 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 723 } 724 }, 725 }, 726 [IB_QPS_SQD] = { 727 [IB_QPS_RESET] = { .valid = 1 }, 728 [IB_QPS_ERR] = { .valid = 1 }, 729 [IB_QPS_RTS] = { 730 .valid = 1, 731 .opt_param = { 732 [IB_QPT_UD] = (IB_QP_CUR_STATE | 733 IB_QP_QKEY), 734 [IB_QPT_UC] = (IB_QP_CUR_STATE | 735 IB_QP_ALT_PATH | 736 IB_QP_ACCESS_FLAGS | 737 IB_QP_PATH_MIG_STATE), 738 [IB_QPT_RC] = (IB_QP_CUR_STATE | 739 IB_QP_ALT_PATH | 740 IB_QP_ACCESS_FLAGS | 741 IB_QP_MIN_RNR_TIMER | 742 IB_QP_PATH_MIG_STATE), 743 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 744 IB_QP_ALT_PATH | 745 IB_QP_ACCESS_FLAGS | 746 IB_QP_PATH_MIG_STATE), 747 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 748 IB_QP_ALT_PATH | 749 IB_QP_ACCESS_FLAGS | 750 IB_QP_MIN_RNR_TIMER | 751 IB_QP_PATH_MIG_STATE), 752 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 753 IB_QP_QKEY), 754 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 755 IB_QP_QKEY), 756 } 757 }, 758 [IB_QPS_SQD] = { 759 .valid = 1, 760 .opt_param = { 761 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 762 IB_QP_QKEY), 763 [IB_QPT_UC] = (IB_QP_AV | 764 IB_QP_ALT_PATH | 765 IB_QP_ACCESS_FLAGS | 766 IB_QP_PKEY_INDEX | 767 IB_QP_PATH_MIG_STATE), 768 [IB_QPT_RC] = (IB_QP_PORT | 769 IB_QP_AV | 770 IB_QP_TIMEOUT | 771 IB_QP_RETRY_CNT | 772 IB_QP_RNR_RETRY | 773 IB_QP_MAX_QP_RD_ATOMIC | 774 IB_QP_MAX_DEST_RD_ATOMIC | 775 IB_QP_ALT_PATH | 776 IB_QP_ACCESS_FLAGS | 777 IB_QP_PKEY_INDEX | 778 IB_QP_MIN_RNR_TIMER | 779 IB_QP_PATH_MIG_STATE), 780 [IB_QPT_XRC_INI] = (IB_QP_PORT | 781 IB_QP_AV | 782 IB_QP_TIMEOUT | 783 IB_QP_RETRY_CNT | 784 IB_QP_RNR_RETRY | 785 IB_QP_MAX_QP_RD_ATOMIC | 786 IB_QP_ALT_PATH | 787 IB_QP_ACCESS_FLAGS | 788 IB_QP_PKEY_INDEX | 789 IB_QP_PATH_MIG_STATE), 790 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 791 IB_QP_AV | 792 IB_QP_TIMEOUT | 793 IB_QP_MAX_DEST_RD_ATOMIC | 794 IB_QP_ALT_PATH | 795 IB_QP_ACCESS_FLAGS | 796 IB_QP_PKEY_INDEX | 797 IB_QP_MIN_RNR_TIMER | 798 IB_QP_PATH_MIG_STATE), 799 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 800 IB_QP_QKEY), 801 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 802 IB_QP_QKEY), 803 } 804 } 805 }, 806 [IB_QPS_SQE] = { 807 [IB_QPS_RESET] = { .valid = 1 }, 808 [IB_QPS_ERR] = { .valid = 1 }, 809 [IB_QPS_RTS] = { 810 .valid = 1, 811 .opt_param = { 812 [IB_QPT_UD] = (IB_QP_CUR_STATE | 813 IB_QP_QKEY), 814 [IB_QPT_UC] = (IB_QP_CUR_STATE | 815 IB_QP_ACCESS_FLAGS), 816 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 817 IB_QP_QKEY), 818 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 819 IB_QP_QKEY), 820 } 821 } 822 }, 823 [IB_QPS_ERR] = { 824 [IB_QPS_RESET] = { .valid = 1 }, 825 [IB_QPS_ERR] = { .valid = 1 } 826 } 827 }; 828 829 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 830 enum ib_qp_type type, enum ib_qp_attr_mask mask, 831 enum rdma_link_layer ll) 832 { 833 enum ib_qp_attr_mask req_param, opt_param; 834 835 if (cur_state < 0 || cur_state > IB_QPS_ERR || 836 next_state < 0 || next_state > IB_QPS_ERR) 837 return 0; 838 839 if (mask & IB_QP_CUR_STATE && 840 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 841 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 842 return 0; 843 844 if (!qp_state_table[cur_state][next_state].valid) 845 return 0; 846 847 req_param = qp_state_table[cur_state][next_state].req_param[type]; 848 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 849 850 if (ll == IB_LINK_LAYER_ETHERNET) { 851 req_param |= qp_state_table[cur_state][next_state]. 852 req_param_add_eth[type]; 853 opt_param |= qp_state_table[cur_state][next_state]. 854 opt_param_add_eth[type]; 855 } 856 857 if ((mask & req_param) != req_param) 858 return 0; 859 860 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 861 return 0; 862 863 return 1; 864 } 865 EXPORT_SYMBOL(ib_modify_qp_is_ok); 866 867 int ib_resolve_eth_l2_attrs(struct ib_qp *qp, 868 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 869 { 870 int ret = 0; 871 union ib_gid sgid; 872 873 if ((*qp_attr_mask & IB_QP_AV) && 874 (rdma_port_get_link_layer(qp->device, qp_attr->ah_attr.port_num) == IB_LINK_LAYER_ETHERNET)) { 875 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num, 876 qp_attr->ah_attr.grh.sgid_index, &sgid); 877 if (ret) 878 goto out; 879 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) { 880 rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac); 881 rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac); 882 qp_attr->vlan_id = rdma_get_vlan_id(&sgid); 883 } else { 884 ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid, 885 qp_attr->ah_attr.dmac, &qp_attr->vlan_id); 886 if (ret) 887 goto out; 888 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL); 889 if (ret) 890 goto out; 891 } 892 *qp_attr_mask |= IB_QP_SMAC; 893 if (qp_attr->vlan_id < 0xFFFF) 894 *qp_attr_mask |= IB_QP_VID; 895 } 896 out: 897 return ret; 898 } 899 EXPORT_SYMBOL(ib_resolve_eth_l2_attrs); 900 901 902 int ib_modify_qp(struct ib_qp *qp, 903 struct ib_qp_attr *qp_attr, 904 int qp_attr_mask) 905 { 906 int ret; 907 908 ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask); 909 if (ret) 910 return ret; 911 912 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 913 } 914 EXPORT_SYMBOL(ib_modify_qp); 915 916 int ib_query_qp(struct ib_qp *qp, 917 struct ib_qp_attr *qp_attr, 918 int qp_attr_mask, 919 struct ib_qp_init_attr *qp_init_attr) 920 { 921 return qp->device->query_qp ? 922 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 923 -ENOSYS; 924 } 925 EXPORT_SYMBOL(ib_query_qp); 926 927 int ib_close_qp(struct ib_qp *qp) 928 { 929 struct ib_qp *real_qp; 930 unsigned long flags; 931 932 real_qp = qp->real_qp; 933 if (real_qp == qp) 934 return -EINVAL; 935 936 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 937 list_del(&qp->open_list); 938 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 939 940 atomic_dec(&real_qp->usecnt); 941 kfree(qp); 942 943 return 0; 944 } 945 EXPORT_SYMBOL(ib_close_qp); 946 947 static int __ib_destroy_shared_qp(struct ib_qp *qp) 948 { 949 struct ib_xrcd *xrcd; 950 struct ib_qp *real_qp; 951 int ret; 952 953 real_qp = qp->real_qp; 954 xrcd = real_qp->xrcd; 955 956 mutex_lock(&xrcd->tgt_qp_mutex); 957 ib_close_qp(qp); 958 if (atomic_read(&real_qp->usecnt) == 0) 959 list_del(&real_qp->xrcd_list); 960 else 961 real_qp = NULL; 962 mutex_unlock(&xrcd->tgt_qp_mutex); 963 964 if (real_qp) { 965 ret = ib_destroy_qp(real_qp); 966 if (!ret) 967 atomic_dec(&xrcd->usecnt); 968 else 969 __ib_insert_xrcd_qp(xrcd, real_qp); 970 } 971 972 return 0; 973 } 974 975 int ib_destroy_qp(struct ib_qp *qp) 976 { 977 struct ib_pd *pd; 978 struct ib_cq *scq, *rcq; 979 struct ib_srq *srq; 980 int ret; 981 982 if (atomic_read(&qp->usecnt)) 983 return -EBUSY; 984 985 if (qp->real_qp != qp) 986 return __ib_destroy_shared_qp(qp); 987 988 pd = qp->pd; 989 scq = qp->send_cq; 990 rcq = qp->recv_cq; 991 srq = qp->srq; 992 993 ret = qp->device->destroy_qp(qp); 994 if (!ret) { 995 if (pd) 996 atomic_dec(&pd->usecnt); 997 if (scq) 998 atomic_dec(&scq->usecnt); 999 if (rcq) 1000 atomic_dec(&rcq->usecnt); 1001 if (srq) 1002 atomic_dec(&srq->usecnt); 1003 } 1004 1005 return ret; 1006 } 1007 EXPORT_SYMBOL(ib_destroy_qp); 1008 1009 /* Completion queues */ 1010 1011 struct ib_cq *ib_create_cq(struct ib_device *device, 1012 ib_comp_handler comp_handler, 1013 void (*event_handler)(struct ib_event *, void *), 1014 void *cq_context, int cqe, int comp_vector) 1015 { 1016 struct ib_cq *cq; 1017 1018 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL); 1019 1020 if (!IS_ERR(cq)) { 1021 cq->device = device; 1022 cq->uobject = NULL; 1023 cq->comp_handler = comp_handler; 1024 cq->event_handler = event_handler; 1025 cq->cq_context = cq_context; 1026 atomic_set(&cq->usecnt, 0); 1027 } 1028 1029 return cq; 1030 } 1031 EXPORT_SYMBOL(ib_create_cq); 1032 1033 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1034 { 1035 return cq->device->modify_cq ? 1036 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS; 1037 } 1038 EXPORT_SYMBOL(ib_modify_cq); 1039 1040 int ib_destroy_cq(struct ib_cq *cq) 1041 { 1042 if (atomic_read(&cq->usecnt)) 1043 return -EBUSY; 1044 1045 return cq->device->destroy_cq(cq); 1046 } 1047 EXPORT_SYMBOL(ib_destroy_cq); 1048 1049 int ib_resize_cq(struct ib_cq *cq, int cqe) 1050 { 1051 return cq->device->resize_cq ? 1052 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 1053 } 1054 EXPORT_SYMBOL(ib_resize_cq); 1055 1056 /* Memory regions */ 1057 1058 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) 1059 { 1060 struct ib_mr *mr; 1061 int err; 1062 1063 err = ib_check_mr_access(mr_access_flags); 1064 if (err) 1065 return ERR_PTR(err); 1066 1067 mr = pd->device->get_dma_mr(pd, mr_access_flags); 1068 1069 if (!IS_ERR(mr)) { 1070 mr->device = pd->device; 1071 mr->pd = pd; 1072 mr->uobject = NULL; 1073 atomic_inc(&pd->usecnt); 1074 atomic_set(&mr->usecnt, 0); 1075 } 1076 1077 return mr; 1078 } 1079 EXPORT_SYMBOL(ib_get_dma_mr); 1080 1081 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, 1082 struct ib_phys_buf *phys_buf_array, 1083 int num_phys_buf, 1084 int mr_access_flags, 1085 u64 *iova_start) 1086 { 1087 struct ib_mr *mr; 1088 int err; 1089 1090 err = ib_check_mr_access(mr_access_flags); 1091 if (err) 1092 return ERR_PTR(err); 1093 1094 if (!pd->device->reg_phys_mr) 1095 return ERR_PTR(-ENOSYS); 1096 1097 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, 1098 mr_access_flags, iova_start); 1099 1100 if (!IS_ERR(mr)) { 1101 mr->device = pd->device; 1102 mr->pd = pd; 1103 mr->uobject = NULL; 1104 atomic_inc(&pd->usecnt); 1105 atomic_set(&mr->usecnt, 0); 1106 } 1107 1108 return mr; 1109 } 1110 EXPORT_SYMBOL(ib_reg_phys_mr); 1111 1112 int ib_rereg_phys_mr(struct ib_mr *mr, 1113 int mr_rereg_mask, 1114 struct ib_pd *pd, 1115 struct ib_phys_buf *phys_buf_array, 1116 int num_phys_buf, 1117 int mr_access_flags, 1118 u64 *iova_start) 1119 { 1120 struct ib_pd *old_pd; 1121 int ret; 1122 1123 ret = ib_check_mr_access(mr_access_flags); 1124 if (ret) 1125 return ret; 1126 1127 if (!mr->device->rereg_phys_mr) 1128 return -ENOSYS; 1129 1130 if (atomic_read(&mr->usecnt)) 1131 return -EBUSY; 1132 1133 old_pd = mr->pd; 1134 1135 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, 1136 phys_buf_array, num_phys_buf, 1137 mr_access_flags, iova_start); 1138 1139 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { 1140 atomic_dec(&old_pd->usecnt); 1141 atomic_inc(&pd->usecnt); 1142 } 1143 1144 return ret; 1145 } 1146 EXPORT_SYMBOL(ib_rereg_phys_mr); 1147 1148 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) 1149 { 1150 return mr->device->query_mr ? 1151 mr->device->query_mr(mr, mr_attr) : -ENOSYS; 1152 } 1153 EXPORT_SYMBOL(ib_query_mr); 1154 1155 int ib_dereg_mr(struct ib_mr *mr) 1156 { 1157 struct ib_pd *pd; 1158 int ret; 1159 1160 if (atomic_read(&mr->usecnt)) 1161 return -EBUSY; 1162 1163 pd = mr->pd; 1164 ret = mr->device->dereg_mr(mr); 1165 if (!ret) 1166 atomic_dec(&pd->usecnt); 1167 1168 return ret; 1169 } 1170 EXPORT_SYMBOL(ib_dereg_mr); 1171 1172 struct ib_mr *ib_create_mr(struct ib_pd *pd, 1173 struct ib_mr_init_attr *mr_init_attr) 1174 { 1175 struct ib_mr *mr; 1176 1177 if (!pd->device->create_mr) 1178 return ERR_PTR(-ENOSYS); 1179 1180 mr = pd->device->create_mr(pd, mr_init_attr); 1181 1182 if (!IS_ERR(mr)) { 1183 mr->device = pd->device; 1184 mr->pd = pd; 1185 mr->uobject = NULL; 1186 atomic_inc(&pd->usecnt); 1187 atomic_set(&mr->usecnt, 0); 1188 } 1189 1190 return mr; 1191 } 1192 EXPORT_SYMBOL(ib_create_mr); 1193 1194 int ib_destroy_mr(struct ib_mr *mr) 1195 { 1196 struct ib_pd *pd; 1197 int ret; 1198 1199 if (atomic_read(&mr->usecnt)) 1200 return -EBUSY; 1201 1202 pd = mr->pd; 1203 ret = mr->device->destroy_mr(mr); 1204 if (!ret) 1205 atomic_dec(&pd->usecnt); 1206 1207 return ret; 1208 } 1209 EXPORT_SYMBOL(ib_destroy_mr); 1210 1211 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len) 1212 { 1213 struct ib_mr *mr; 1214 1215 if (!pd->device->alloc_fast_reg_mr) 1216 return ERR_PTR(-ENOSYS); 1217 1218 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len); 1219 1220 if (!IS_ERR(mr)) { 1221 mr->device = pd->device; 1222 mr->pd = pd; 1223 mr->uobject = NULL; 1224 atomic_inc(&pd->usecnt); 1225 atomic_set(&mr->usecnt, 0); 1226 } 1227 1228 return mr; 1229 } 1230 EXPORT_SYMBOL(ib_alloc_fast_reg_mr); 1231 1232 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device, 1233 int max_page_list_len) 1234 { 1235 struct ib_fast_reg_page_list *page_list; 1236 1237 if (!device->alloc_fast_reg_page_list) 1238 return ERR_PTR(-ENOSYS); 1239 1240 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len); 1241 1242 if (!IS_ERR(page_list)) { 1243 page_list->device = device; 1244 page_list->max_page_list_len = max_page_list_len; 1245 } 1246 1247 return page_list; 1248 } 1249 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list); 1250 1251 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) 1252 { 1253 page_list->device->free_fast_reg_page_list(page_list); 1254 } 1255 EXPORT_SYMBOL(ib_free_fast_reg_page_list); 1256 1257 /* Memory windows */ 1258 1259 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) 1260 { 1261 struct ib_mw *mw; 1262 1263 if (!pd->device->alloc_mw) 1264 return ERR_PTR(-ENOSYS); 1265 1266 mw = pd->device->alloc_mw(pd, type); 1267 if (!IS_ERR(mw)) { 1268 mw->device = pd->device; 1269 mw->pd = pd; 1270 mw->uobject = NULL; 1271 mw->type = type; 1272 atomic_inc(&pd->usecnt); 1273 } 1274 1275 return mw; 1276 } 1277 EXPORT_SYMBOL(ib_alloc_mw); 1278 1279 int ib_dealloc_mw(struct ib_mw *mw) 1280 { 1281 struct ib_pd *pd; 1282 int ret; 1283 1284 pd = mw->pd; 1285 ret = mw->device->dealloc_mw(mw); 1286 if (!ret) 1287 atomic_dec(&pd->usecnt); 1288 1289 return ret; 1290 } 1291 EXPORT_SYMBOL(ib_dealloc_mw); 1292 1293 /* "Fast" memory regions */ 1294 1295 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1296 int mr_access_flags, 1297 struct ib_fmr_attr *fmr_attr) 1298 { 1299 struct ib_fmr *fmr; 1300 1301 if (!pd->device->alloc_fmr) 1302 return ERR_PTR(-ENOSYS); 1303 1304 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1305 if (!IS_ERR(fmr)) { 1306 fmr->device = pd->device; 1307 fmr->pd = pd; 1308 atomic_inc(&pd->usecnt); 1309 } 1310 1311 return fmr; 1312 } 1313 EXPORT_SYMBOL(ib_alloc_fmr); 1314 1315 int ib_unmap_fmr(struct list_head *fmr_list) 1316 { 1317 struct ib_fmr *fmr; 1318 1319 if (list_empty(fmr_list)) 1320 return 0; 1321 1322 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1323 return fmr->device->unmap_fmr(fmr_list); 1324 } 1325 EXPORT_SYMBOL(ib_unmap_fmr); 1326 1327 int ib_dealloc_fmr(struct ib_fmr *fmr) 1328 { 1329 struct ib_pd *pd; 1330 int ret; 1331 1332 pd = fmr->pd; 1333 ret = fmr->device->dealloc_fmr(fmr); 1334 if (!ret) 1335 atomic_dec(&pd->usecnt); 1336 1337 return ret; 1338 } 1339 EXPORT_SYMBOL(ib_dealloc_fmr); 1340 1341 /* Multicast groups */ 1342 1343 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1344 { 1345 int ret; 1346 1347 if (!qp->device->attach_mcast) 1348 return -ENOSYS; 1349 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1350 return -EINVAL; 1351 1352 ret = qp->device->attach_mcast(qp, gid, lid); 1353 if (!ret) 1354 atomic_inc(&qp->usecnt); 1355 return ret; 1356 } 1357 EXPORT_SYMBOL(ib_attach_mcast); 1358 1359 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1360 { 1361 int ret; 1362 1363 if (!qp->device->detach_mcast) 1364 return -ENOSYS; 1365 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) 1366 return -EINVAL; 1367 1368 ret = qp->device->detach_mcast(qp, gid, lid); 1369 if (!ret) 1370 atomic_dec(&qp->usecnt); 1371 return ret; 1372 } 1373 EXPORT_SYMBOL(ib_detach_mcast); 1374 1375 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) 1376 { 1377 struct ib_xrcd *xrcd; 1378 1379 if (!device->alloc_xrcd) 1380 return ERR_PTR(-ENOSYS); 1381 1382 xrcd = device->alloc_xrcd(device, NULL, NULL); 1383 if (!IS_ERR(xrcd)) { 1384 xrcd->device = device; 1385 xrcd->inode = NULL; 1386 atomic_set(&xrcd->usecnt, 0); 1387 mutex_init(&xrcd->tgt_qp_mutex); 1388 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1389 } 1390 1391 return xrcd; 1392 } 1393 EXPORT_SYMBOL(ib_alloc_xrcd); 1394 1395 int ib_dealloc_xrcd(struct ib_xrcd *xrcd) 1396 { 1397 struct ib_qp *qp; 1398 int ret; 1399 1400 if (atomic_read(&xrcd->usecnt)) 1401 return -EBUSY; 1402 1403 while (!list_empty(&xrcd->tgt_qp_list)) { 1404 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1405 ret = ib_destroy_qp(qp); 1406 if (ret) 1407 return ret; 1408 } 1409 1410 return xrcd->device->dealloc_xrcd(xrcd); 1411 } 1412 EXPORT_SYMBOL(ib_dealloc_xrcd); 1413 1414 struct ib_flow *ib_create_flow(struct ib_qp *qp, 1415 struct ib_flow_attr *flow_attr, 1416 int domain) 1417 { 1418 struct ib_flow *flow_id; 1419 if (!qp->device->create_flow) 1420 return ERR_PTR(-ENOSYS); 1421 1422 flow_id = qp->device->create_flow(qp, flow_attr, domain); 1423 if (!IS_ERR(flow_id)) 1424 atomic_inc(&qp->usecnt); 1425 return flow_id; 1426 } 1427 EXPORT_SYMBOL(ib_create_flow); 1428 1429 int ib_destroy_flow(struct ib_flow *flow_id) 1430 { 1431 int err; 1432 struct ib_qp *qp = flow_id->qp; 1433 1434 err = qp->device->destroy_flow(flow_id); 1435 if (!err) 1436 atomic_dec(&qp->usecnt); 1437 return err; 1438 } 1439 EXPORT_SYMBOL(ib_destroy_flow); 1440 1441 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 1442 struct ib_mr_status *mr_status) 1443 { 1444 return mr->device->check_mr_status ? 1445 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS; 1446 } 1447 EXPORT_SYMBOL(ib_check_mr_status); 1448