drivers/infiniband/core/verbs.c

   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 static const char * const ib_events[] = {
  52         [IB_EVENT_CQ_ERR]               = "CQ error",
  53         [IB_EVENT_QP_FATAL]             = "QP fatal error",
  54         [IB_EVENT_QP_REQ_ERR]           = "QP request error",
  55         [IB_EVENT_QP_ACCESS_ERR]        = "QP access error",
  56         [IB_EVENT_COMM_EST]             = "communication established",
  57         [IB_EVENT_SQ_DRAINED]           = "send queue drained",
  58         [IB_EVENT_PATH_MIG]             = "path migration successful",
  59         [IB_EVENT_PATH_MIG_ERR]         = "path migration error",
  60         [IB_EVENT_DEVICE_FATAL]         = "device fatal error",
  61         [IB_EVENT_PORT_ACTIVE]          = "port active",
  62         [IB_EVENT_PORT_ERR]             = "port error",
  63         [IB_EVENT_LID_CHANGE]           = "LID change",
  64         [IB_EVENT_PKEY_CHANGE]          = "P_key change",
  65         [IB_EVENT_SM_CHANGE]            = "SM change",
  66         [IB_EVENT_SRQ_ERR]              = "SRQ error",
  67         [IB_EVENT_SRQ_LIMIT_REACHED]    = "SRQ limit reached",
  68         [IB_EVENT_QP_LAST_WQE_REACHED]  = "last WQE reached",
  69         [IB_EVENT_CLIENT_REREGISTER]    = "client reregister",
  70         [IB_EVENT_GID_CHANGE]           = "GID changed",
  71 };
  72
  73 const char *ib_event_msg(enum ib_event_type event)
  74 {
  75         size_t index = event;
  76
  77         return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
  78                         ib_events[index] : "unrecognized event";
  79 }
  80 EXPORT_SYMBOL(ib_event_msg);
  81
  82 static const char * const wc_statuses[] = {
  83         [IB_WC_SUCCESS]                 = "success",
  84         [IB_WC_LOC_LEN_ERR]             = "local length error",
  85         [IB_WC_LOC_QP_OP_ERR]           = "local QP operation error",
  86         [IB_WC_LOC_EEC_OP_ERR]          = "local EE context operation error",
  87         [IB_WC_LOC_PROT_ERR]            = "local protection error",
  88         [IB_WC_WR_FLUSH_ERR]            = "WR flushed",
  89         [IB_WC_MW_BIND_ERR]             = "memory management operation error",
  90         [IB_WC_BAD_RESP_ERR]            = "bad response error",
  91         [IB_WC_LOC_ACCESS_ERR]          = "local access error",
  92         [IB_WC_REM_INV_REQ_ERR]         = "invalid request error",
  93         [IB_WC_REM_ACCESS_ERR]          = "remote access error",
  94         [IB_WC_REM_OP_ERR]              = "remote operation error",
  95         [IB_WC_RETRY_EXC_ERR]           = "transport retry counter exceeded",
  96         [IB_WC_RNR_RETRY_EXC_ERR]       = "RNR retry counter exceeded",
  97         [IB_WC_LOC_RDD_VIOL_ERR]        = "local RDD violation error",
  98         [IB_WC_REM_INV_RD_REQ_ERR]      = "remote invalid RD request",
  99         [IB_WC_REM_ABORT_ERR]           = "operation aborted",
 100         [IB_WC_INV_EECN_ERR]            = "invalid EE context number",
 101         [IB_WC_INV_EEC_STATE_ERR]       = "invalid EE context state",
 102         [IB_WC_FATAL_ERR]               = "fatal error",
 103         [IB_WC_RESP_TIMEOUT_ERR]        = "response timeout error",
 104         [IB_WC_GENERAL_ERR]             = "general error",
 105 };
 106
 107 const char *ib_wc_status_msg(enum ib_wc_status status)
 108 {
 109         size_t index = status;
 110
 111         return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
 112                         wc_statuses[index] : "unrecognized status";
 113 }
 114 EXPORT_SYMBOL(ib_wc_status_msg);
 115
 116 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
 117 {
 118         switch (rate) {
 119         case IB_RATE_2_5_GBPS: return  1;
 120         case IB_RATE_5_GBPS:   return  2;
 121         case IB_RATE_10_GBPS:  return  4;
 122         case IB_RATE_20_GBPS:  return  8;
 123         case IB_RATE_30_GBPS:  return 12;
 124         case IB_RATE_40_GBPS:  return 16;
 125         case IB_RATE_60_GBPS:  return 24;
 126         case IB_RATE_80_GBPS:  return 32;
 127         case IB_RATE_120_GBPS: return 48;
 128         default:               return -1;
 129         }
 130 }
 131 EXPORT_SYMBOL(ib_rate_to_mult);
 132
 133 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
 134 {
 135         switch (mult) {
 136         case 1:  return IB_RATE_2_5_GBPS;
 137         case 2:  return IB_RATE_5_GBPS;
 138         case 4:  return IB_RATE_10_GBPS;
 139         case 8:  return IB_RATE_20_GBPS;
 140         case 12: return IB_RATE_30_GBPS;
 141         case 16: return IB_RATE_40_GBPS;
 142         case 24: return IB_RATE_60_GBPS;
 143         case 32: return IB_RATE_80_GBPS;
 144         case 48: return IB_RATE_120_GBPS;
 145         default: return IB_RATE_PORT_CURRENT;
 146         }
 147 }
 148 EXPORT_SYMBOL(mult_to_ib_rate);
 149
 150 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
 151 {
 152         switch (rate) {
 153         case IB_RATE_2_5_GBPS: return 2500;
 154         case IB_RATE_5_GBPS:   return 5000;
 155         case IB_RATE_10_GBPS:  return 10000;
 156         case IB_RATE_20_GBPS:  return 20000;
 157         case IB_RATE_30_GBPS:  return 30000;
 158         case IB_RATE_40_GBPS:  return 40000;
 159         case IB_RATE_60_GBPS:  return 60000;
 160         case IB_RATE_80_GBPS:  return 80000;
 161         case IB_RATE_120_GBPS: return 120000;
 162         case IB_RATE_14_GBPS:  return 14062;
 163         case IB_RATE_56_GBPS:  return 56250;
 164         case IB_RATE_112_GBPS: return 112500;
 165         case IB_RATE_168_GBPS: return 168750;
 166         case IB_RATE_25_GBPS:  return 25781;
 167         case IB_RATE_100_GBPS: return 103125;
 168         case IB_RATE_200_GBPS: return 206250;
 169         case IB_RATE_300_GBPS: return 309375;
 170         default:               return -1;
 171         }
 172 }
 173 EXPORT_SYMBOL(ib_rate_to_mbps);
 174
 175 __attribute_const__ enum rdma_transport_type
 176 rdma_node_get_transport(enum rdma_node_type node_type)
 177 {
 178         switch (node_type) {
 179         case RDMA_NODE_IB_CA:
 180         case RDMA_NODE_IB_SWITCH:
 181         case RDMA_NODE_IB_ROUTER:
 182                 return RDMA_TRANSPORT_IB;
 183         case RDMA_NODE_RNIC:
 184                 return RDMA_TRANSPORT_IWARP;
 185         case RDMA_NODE_USNIC:
 186                 return RDMA_TRANSPORT_USNIC;
 187         case RDMA_NODE_USNIC_UDP:
 188                 return RDMA_TRANSPORT_USNIC_UDP;
 189         default:
 190                 BUG();
 191                 return 0;
 192         }
 193 }
 194 EXPORT_SYMBOL(rdma_node_get_transport);
 195
 196 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
 197 {
 198         if (device->get_link_layer)
 199                 return device->get_link_layer(device, port_num);
 200
 201         switch (rdma_node_get_transport(device->node_type)) {
 202         case RDMA_TRANSPORT_IB:
 203                 return IB_LINK_LAYER_INFINIBAND;
 204         case RDMA_TRANSPORT_IWARP:
 205         case RDMA_TRANSPORT_USNIC:
 206         case RDMA_TRANSPORT_USNIC_UDP:
 207                 return IB_LINK_LAYER_ETHERNET;
 208         default:
 209                 return IB_LINK_LAYER_UNSPECIFIED;
 210         }
 211 }
 212 EXPORT_SYMBOL(rdma_port_get_link_layer);
 213
 214 /* Protection domains */
 215
 216 struct ib_pd *ib_alloc_pd(struct ib_device *device)
 217 {
 218         struct ib_pd *pd;
 219
 220         pd = device->alloc_pd(device, NULL, NULL);
 221
 222         if (!IS_ERR(pd)) {
 223                 pd->device  = device;
 224                 pd->uobject = NULL;
 225                 atomic_set(&pd->usecnt, 0);
 226         }
 227
 228         return pd;
 229 }
 230 EXPORT_SYMBOL(ib_alloc_pd);
 231
 232 int ib_dealloc_pd(struct ib_pd *pd)
 233 {
 234         if (atomic_read(&pd->usecnt))
 235                 return -EBUSY;
 236
 237         return pd->device->dealloc_pd(pd);
 238 }
 239 EXPORT_SYMBOL(ib_dealloc_pd);
 240
 241 /* Address handles */
 242
 243 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 244 {
 245         struct ib_ah *ah;
 246
 247         ah = pd->device->create_ah(pd, ah_attr);
 248
 249         if (!IS_ERR(ah)) {
 250                 ah->device  = pd->device;
 251                 ah->pd      = pd;
 252                 ah->uobject = NULL;
 253                 atomic_inc(&pd->usecnt);
 254         }
 255
 256         return ah;
 257 }
 258 EXPORT_SYMBOL(ib_create_ah);
 259
 260 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
 261                        const struct ib_wc *wc, const struct ib_grh *grh,
 262                        struct ib_ah_attr *ah_attr)
 263 {
 264         u32 flow_class;
 265         u16 gid_index;
 266         int ret;
 267
 268         memset(ah_attr, 0, sizeof *ah_attr);
 269         if (rdma_cap_eth_ah(device, port_num)) {
 270                 if (!(wc->wc_flags & IB_WC_GRH))
 271                         return -EPROTOTYPE;
 272
 273                 if (wc->wc_flags & IB_WC_WITH_SMAC &&
 274                     wc->wc_flags & IB_WC_WITH_VLAN) {
 275                         memcpy(ah_attr->dmac, wc->smac, ETH_ALEN);
 276                         ah_attr->vlan_id = wc->vlan_id;
 277                 } else {
 278                         ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid,
 279                                         ah_attr->dmac, &ah_attr->vlan_id);
 280                         if (ret)
 281                                 return ret;
 282                 }
 283         } else {
 284                 ah_attr->vlan_id = 0xffff;
 285         }
 286
 287         ah_attr->dlid = wc->slid;
 288         ah_attr->sl = wc->sl;
 289         ah_attr->src_path_bits = wc->dlid_path_bits;
 290         ah_attr->port_num = port_num;
 291
 292         if (wc->wc_flags & IB_WC_GRH) {
 293                 ah_attr->ah_flags = IB_AH_GRH;
 294                 ah_attr->grh.dgid = grh->sgid;
 295
 296                 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
 297                                          &gid_index);
 298                 if (ret)
 299                         return ret;
 300
 301                 ah_attr->grh.sgid_index = (u8) gid_index;
 302                 flow_class = be32_to_cpu(grh->version_tclass_flow);
 303                 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
 304                 ah_attr->grh.hop_limit = 0xFF;
 305                 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
 306         }
 307         return 0;
 308 }
 309 EXPORT_SYMBOL(ib_init_ah_from_wc);
 310
 311 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
 312                                    const struct ib_grh *grh, u8 port_num)
 313 {
 314         struct ib_ah_attr ah_attr;
 315         int ret;
 316
 317         ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
 318         if (ret)
 319                 return ERR_PTR(ret);
 320
 321         return ib_create_ah(pd, &ah_attr);
 322 }
 323 EXPORT_SYMBOL(ib_create_ah_from_wc);
 324
 325 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 326 {
 327         return ah->device->modify_ah ?
 328                 ah->device->modify_ah(ah, ah_attr) :
 329                 -ENOSYS;
 330 }
 331 EXPORT_SYMBOL(ib_modify_ah);
 332
 333 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 334 {
 335         return ah->device->query_ah ?
 336                 ah->device->query_ah(ah, ah_attr) :
 337                 -ENOSYS;
 338 }
 339 EXPORT_SYMBOL(ib_query_ah);
 340
 341 int ib_destroy_ah(struct ib_ah *ah)
 342 {
 343         struct ib_pd *pd;
 344         int ret;
 345
 346         pd = ah->pd;
 347         ret = ah->device->destroy_ah(ah);
 348         if (!ret)
 349                 atomic_dec(&pd->usecnt);
 350
 351         return ret;
 352 }
 353 EXPORT_SYMBOL(ib_destroy_ah);
 354
 355 /* Shared receive queues */
 356
 357 struct ib_srq *ib_create_srq(struct ib_pd *pd,
 358                              struct ib_srq_init_attr *srq_init_attr)
 359 {
 360         struct ib_srq *srq;
 361
 362         if (!pd->device->create_srq)
 363                 return ERR_PTR(-ENOSYS);
 364
 365         srq = pd->device->create_srq(pd, srq_init_attr, NULL);
 366
 367         if (!IS_ERR(srq)) {
 368                 srq->device        = pd->device;
 369                 srq->pd            = pd;
 370                 srq->uobject       = NULL;
 371                 srq->event_handler = srq_init_attr->event_handler;
 372                 srq->srq_context   = srq_init_attr->srq_context;
 373                 srq->srq_type      = srq_init_attr->srq_type;
 374                 if (srq->srq_type == IB_SRQT_XRC) {
 375                         srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
 376                         srq->ext.xrc.cq   = srq_init_attr->ext.xrc.cq;
 377                         atomic_inc(&srq->ext.xrc.xrcd->usecnt);
 378                         atomic_inc(&srq->ext.xrc.cq->usecnt);
 379                 }
 380                 atomic_inc(&pd->usecnt);
 381                 atomic_set(&srq->usecnt, 0);
 382         }
 383
 384         return srq;
 385 }
 386 EXPORT_SYMBOL(ib_create_srq);
 387
 388 int ib_modify_srq(struct ib_srq *srq,
 389                   struct ib_srq_attr *srq_attr,
 390                   enum ib_srq_attr_mask srq_attr_mask)
 391 {
 392         return srq->device->modify_srq ?
 393                 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
 394                 -ENOSYS;
 395 }
 396 EXPORT_SYMBOL(ib_modify_srq);
 397
 398 int ib_query_srq(struct ib_srq *srq,
 399                  struct ib_srq_attr *srq_attr)
 400 {
 401         return srq->device->query_srq ?
 402                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 403 }
 404 EXPORT_SYMBOL(ib_query_srq);
 405
 406 int ib_destroy_srq(struct ib_srq *srq)
 407 {
 408         struct ib_pd *pd;
 409         enum ib_srq_type srq_type;
 410         struct ib_xrcd *uninitialized_var(xrcd);
 411         struct ib_cq *uninitialized_var(cq);
 412         int ret;
 413
 414         if (atomic_read(&srq->usecnt))
 415                 return -EBUSY;
 416
 417         pd = srq->pd;
 418         srq_type = srq->srq_type;
 419         if (srq_type == IB_SRQT_XRC) {
 420                 xrcd = srq->ext.xrc.xrcd;
 421                 cq = srq->ext.xrc.cq;
 422         }
 423
 424         ret = srq->device->destroy_srq(srq);
 425         if (!ret) {
 426                 atomic_dec(&pd->usecnt);
 427                 if (srq_type == IB_SRQT_XRC) {
 428                         atomic_dec(&xrcd->usecnt);
 429                         atomic_dec(&cq->usecnt);
 430                 }
 431         }
 432
 433         return ret;
 434 }
 435 EXPORT_SYMBOL(ib_destroy_srq);
 436
 437 /* Queue pairs */
 438
 439 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
 440 {
 441         struct ib_qp *qp = context;
 442         unsigned long flags;
 443
 444         spin_lock_irqsave(&qp->device->event_handler_lock, flags);
 445         list_for_each_entry(event->element.qp, &qp->open_list, open_list)
 446                 if (event->element.qp->event_handler)
 447                         event->element.qp->event_handler(event, event->element.qp->qp_context);
 448         spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
 449 }
 450
 451 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
 452 {
 453         mutex_lock(&xrcd->tgt_qp_mutex);
 454         list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
 455         mutex_unlock(&xrcd->tgt_qp_mutex);
 456 }
 457
 458 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
 459                                   void (*event_handler)(struct ib_event *, void *),
 460                                   void *qp_context)
 461 {
 462         struct ib_qp *qp;
 463         unsigned long flags;
 464
 465         qp = kzalloc(sizeof *qp, GFP_KERNEL);
 466         if (!qp)
 467                 return ERR_PTR(-ENOMEM);
 468
 469         qp->real_qp = real_qp;
 470         atomic_inc(&real_qp->usecnt);
 471         qp->device = real_qp->device;
 472         qp->event_handler = event_handler;
 473         qp->qp_context = qp_context;
 474         qp->qp_num = real_qp->qp_num;
 475         qp->qp_type = real_qp->qp_type;
 476
 477         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
 478         list_add(&qp->open_list, &real_qp->open_list);
 479         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
 480
 481         return qp;
 482 }
 483
 484 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
 485                          struct ib_qp_open_attr *qp_open_attr)
 486 {
 487         struct ib_qp *qp, *real_qp;
 488
 489         if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
 490                 return ERR_PTR(-EINVAL);
 491
 492         qp = ERR_PTR(-EINVAL);
 493         mutex_lock(&xrcd->tgt_qp_mutex);
 494         list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
 495                 if (real_qp->qp_num == qp_open_attr->qp_num) {
 496                         qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
 497                                           qp_open_attr->qp_context);
 498                         break;
 499                 }
 500         }
 501         mutex_unlock(&xrcd->tgt_qp_mutex);
 502         return qp;
 503 }
 504 EXPORT_SYMBOL(ib_open_qp);
 505
 506 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 507                            struct ib_qp_init_attr *qp_init_attr)
 508 {
 509         struct ib_qp *qp, *real_qp;
 510         struct ib_device *device;
 511
 512         device = pd ? pd->device : qp_init_attr->xrcd->device;
 513         qp = device->create_qp(pd, qp_init_attr, NULL);
 514
 515         if (!IS_ERR(qp)) {
 516                 qp->device     = device;
 517                 qp->real_qp    = qp;
 518                 qp->uobject    = NULL;
 519                 qp->qp_type    = qp_init_attr->qp_type;
 520
 521                 atomic_set(&qp->usecnt, 0);
 522                 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
 523                         qp->event_handler = __ib_shared_qp_event_handler;
 524                         qp->qp_context = qp;
 525                         qp->pd = NULL;
 526                         qp->send_cq = qp->recv_cq = NULL;
 527                         qp->srq = NULL;
 528                         qp->xrcd = qp_init_attr->xrcd;
 529                         atomic_inc(&qp_init_attr->xrcd->usecnt);
 530                         INIT_LIST_HEAD(&qp->open_list);
 531
 532                         real_qp = qp;
 533                         qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
 534                                           qp_init_attr->qp_context);
 535                         if (!IS_ERR(qp))
 536                                 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
 537                         else
 538                                 real_qp->device->destroy_qp(real_qp);
 539                 } else {
 540                         qp->event_handler = qp_init_attr->event_handler;
 541                         qp->qp_context = qp_init_attr->qp_context;
 542                         if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
 543                                 qp->recv_cq = NULL;
 544                                 qp->srq = NULL;
 545                         } else {
 546                                 qp->recv_cq = qp_init_attr->recv_cq;
 547                                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 548                                 qp->srq = qp_init_attr->srq;
 549                                 if (qp->srq)
 550                                         atomic_inc(&qp_init_attr->srq->usecnt);
 551                         }
 552
 553                         qp->pd      = pd;
 554                         qp->send_cq = qp_init_attr->send_cq;
 555                         qp->xrcd    = NULL;
 556
 557                         atomic_inc(&pd->usecnt);
 558                         atomic_inc(&qp_init_attr->send_cq->usecnt);
 559                 }
 560         }
 561
 562         return qp;
 563 }
 564 EXPORT_SYMBOL(ib_create_qp);
 565
 566 static const struct {
 567         int                     valid;
 568         enum ib_qp_attr_mask    req_param[IB_QPT_MAX];
 569         enum ib_qp_attr_mask    req_param_add_eth[IB_QPT_MAX];
 570         enum ib_qp_attr_mask    opt_param[IB_QPT_MAX];
 571         enum ib_qp_attr_mask    opt_param_add_eth[IB_QPT_MAX];
 572 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 573         [IB_QPS_RESET] = {
 574                 [IB_QPS_RESET] = { .valid = 1 },
 575                 [IB_QPS_INIT]  = {
 576                         .valid = 1,
 577                         .req_param = {
 578                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 579                                                 IB_QP_PORT                      |
 580                                                 IB_QP_QKEY),
 581                                 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
 582                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 583                                                 IB_QP_PORT                      |
 584                                                 IB_QP_ACCESS_FLAGS),
 585                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 586                                                 IB_QP_PORT                      |
 587                                                 IB_QP_ACCESS_FLAGS),
 588                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 589                                                 IB_QP_PORT                      |
 590                                                 IB_QP_ACCESS_FLAGS),
 591                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 592                                                 IB_QP_PORT                      |
 593                                                 IB_QP_ACCESS_FLAGS),
 594                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 595                                                 IB_QP_QKEY),
 596                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 597                                                 IB_QP_QKEY),
 598                         }
 599                 },
 600         },
 601         [IB_QPS_INIT]  = {
 602                 [IB_QPS_RESET] = { .valid = 1 },
 603                 [IB_QPS_ERR] =   { .valid = 1 },
 604                 [IB_QPS_INIT]  = {
 605                         .valid = 1,
 606                         .opt_param = {
 607                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 608                                                 IB_QP_PORT                      |
 609                                                 IB_QP_QKEY),
 610                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 611                                                 IB_QP_PORT                      |
 612                                                 IB_QP_ACCESS_FLAGS),
 613                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 614                                                 IB_QP_PORT                      |
 615                                                 IB_QP_ACCESS_FLAGS),
 616                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 617                                                 IB_QP_PORT                      |
 618                                                 IB_QP_ACCESS_FLAGS),
 619                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 620                                                 IB_QP_PORT                      |
 621                                                 IB_QP_ACCESS_FLAGS),
 622                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 623                                                 IB_QP_QKEY),
 624                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 625                                                 IB_QP_QKEY),
 626                         }
 627                 },
 628                 [IB_QPS_RTR]   = {
 629                         .valid = 1,
 630                         .req_param = {
 631                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 632                                                 IB_QP_PATH_MTU                  |
 633                                                 IB_QP_DEST_QPN                  |
 634                                                 IB_QP_RQ_PSN),
 635                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 636                                                 IB_QP_PATH_MTU                  |
 637                                                 IB_QP_DEST_QPN                  |
 638                                                 IB_QP_RQ_PSN                    |
 639                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 640                                                 IB_QP_MIN_RNR_TIMER),
 641                                 [IB_QPT_XRC_INI] = (IB_QP_AV                    |
 642                                                 IB_QP_PATH_MTU                  |
 643                                                 IB_QP_DEST_QPN                  |
 644                                                 IB_QP_RQ_PSN),
 645                                 [IB_QPT_XRC_TGT] = (IB_QP_AV                    |
 646                                                 IB_QP_PATH_MTU                  |
 647                                                 IB_QP_DEST_QPN                  |
 648                                                 IB_QP_RQ_PSN                    |
 649                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 650                                                 IB_QP_MIN_RNR_TIMER),
 651                         },
 652                         .req_param_add_eth = {
 653                                 [IB_QPT_RC]  = (IB_QP_SMAC),
 654                                 [IB_QPT_UC]  = (IB_QP_SMAC),
 655                                 [IB_QPT_XRC_INI]  = (IB_QP_SMAC),
 656                                 [IB_QPT_XRC_TGT]  = (IB_QP_SMAC)
 657                         },
 658                         .opt_param = {
 659                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 660                                                  IB_QP_QKEY),
 661                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 662                                                  IB_QP_ACCESS_FLAGS             |
 663                                                  IB_QP_PKEY_INDEX),
 664                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 665                                                  IB_QP_ACCESS_FLAGS             |
 666                                                  IB_QP_PKEY_INDEX),
 667                                  [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH             |
 668                                                  IB_QP_ACCESS_FLAGS             |
 669                                                  IB_QP_PKEY_INDEX),
 670                                  [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH             |
 671                                                  IB_QP_ACCESS_FLAGS             |
 672                                                  IB_QP_PKEY_INDEX),
 673                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 674                                                  IB_QP_QKEY),
 675                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 676                                                  IB_QP_QKEY),
 677                          },
 678                         .opt_param_add_eth = {
 679                                 [IB_QPT_RC]  = (IB_QP_ALT_SMAC                  |
 680                                                 IB_QP_VID                       |
 681                                                 IB_QP_ALT_VID),
 682                                 [IB_QPT_UC]  = (IB_QP_ALT_SMAC                  |
 683                                                 IB_QP_VID                       |
 684                                                 IB_QP_ALT_VID),
 685                                 [IB_QPT_XRC_INI]  = (IB_QP_ALT_SMAC                     |
 686                                                 IB_QP_VID                       |
 687                                                 IB_QP_ALT_VID),
 688                                 [IB_QPT_XRC_TGT]  = (IB_QP_ALT_SMAC                     |
 689                                                 IB_QP_VID                       |
 690                                                 IB_QP_ALT_VID)
 691                         }
 692                 }
 693         },
 694         [IB_QPS_RTR]   = {
 695                 [IB_QPS_RESET] = { .valid = 1 },
 696                 [IB_QPS_ERR] =   { .valid = 1 },
 697                 [IB_QPS_RTS]   = {
 698                         .valid = 1,
 699                         .req_param = {
 700                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 701                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 702                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 703                                                 IB_QP_RETRY_CNT                 |
 704                                                 IB_QP_RNR_RETRY                 |
 705                                                 IB_QP_SQ_PSN                    |
 706                                                 IB_QP_MAX_QP_RD_ATOMIC),
 707                                 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT               |
 708                                                 IB_QP_RETRY_CNT                 |
 709                                                 IB_QP_RNR_RETRY                 |
 710                                                 IB_QP_SQ_PSN                    |
 711                                                 IB_QP_MAX_QP_RD_ATOMIC),
 712                                 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT               |
 713                                                 IB_QP_SQ_PSN),
 714                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 715                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 716                         },
 717                         .opt_param = {
 718                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 719                                                  IB_QP_QKEY),
 720                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 721                                                  IB_QP_ALT_PATH                 |
 722                                                  IB_QP_ACCESS_FLAGS             |
 723                                                  IB_QP_PATH_MIG_STATE),
 724                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 725                                                  IB_QP_ALT_PATH                 |
 726                                                  IB_QP_ACCESS_FLAGS             |
 727                                                  IB_QP_MIN_RNR_TIMER            |
 728                                                  IB_QP_PATH_MIG_STATE),
 729                                  [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE            |
 730                                                  IB_QP_ALT_PATH                 |
 731                                                  IB_QP_ACCESS_FLAGS             |
 732                                                  IB_QP_PATH_MIG_STATE),
 733                                  [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE            |
 734                                                  IB_QP_ALT_PATH                 |
 735                                                  IB_QP_ACCESS_FLAGS             |
 736                                                  IB_QP_MIN_RNR_TIMER            |
 737                                                  IB_QP_PATH_MIG_STATE),
 738                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 739                                                  IB_QP_QKEY),
 740                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 741                                                  IB_QP_QKEY),
 742                          }
 743                 }
 744         },
 745         [IB_QPS_RTS]   = {
 746                 [IB_QPS_RESET] = { .valid = 1 },
 747                 [IB_QPS_ERR] =   { .valid = 1 },
 748                 [IB_QPS_RTS]   = {
 749                         .valid = 1,
 750                         .opt_param = {
 751                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 752                                                 IB_QP_QKEY),
 753                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 754                                                 IB_QP_ACCESS_FLAGS              |
 755                                                 IB_QP_ALT_PATH                  |
 756                                                 IB_QP_PATH_MIG_STATE),
 757                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 758                                                 IB_QP_ACCESS_FLAGS              |
 759                                                 IB_QP_ALT_PATH                  |
 760                                                 IB_QP_PATH_MIG_STATE            |
 761                                                 IB_QP_MIN_RNR_TIMER),
 762                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 763                                                 IB_QP_ACCESS_FLAGS              |
 764                                                 IB_QP_ALT_PATH                  |
 765                                                 IB_QP_PATH_MIG_STATE),
 766                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 767                                                 IB_QP_ACCESS_FLAGS              |
 768                                                 IB_QP_ALT_PATH                  |
 769                                                 IB_QP_PATH_MIG_STATE            |
 770                                                 IB_QP_MIN_RNR_TIMER),
 771                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 772                                                 IB_QP_QKEY),
 773                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 774                                                 IB_QP_QKEY),
 775                         }
 776                 },
 777                 [IB_QPS_SQD]   = {
 778                         .valid = 1,
 779                         .opt_param = {
 780                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 781                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 782                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 783                                 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 784                                 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
 785                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 786                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 787                         }
 788                 },
 789         },
 790         [IB_QPS_SQD]   = {
 791                 [IB_QPS_RESET] = { .valid = 1 },
 792                 [IB_QPS_ERR] =   { .valid = 1 },
 793                 [IB_QPS_RTS]   = {
 794                         .valid = 1,
 795                         .opt_param = {
 796                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 797                                                 IB_QP_QKEY),
 798                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 799                                                 IB_QP_ALT_PATH                  |
 800                                                 IB_QP_ACCESS_FLAGS              |
 801                                                 IB_QP_PATH_MIG_STATE),
 802                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 803                                                 IB_QP_ALT_PATH                  |
 804                                                 IB_QP_ACCESS_FLAGS              |
 805                                                 IB_QP_MIN_RNR_TIMER             |
 806                                                 IB_QP_PATH_MIG_STATE),
 807                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 808                                                 IB_QP_ALT_PATH                  |
 809                                                 IB_QP_ACCESS_FLAGS              |
 810                                                 IB_QP_PATH_MIG_STATE),
 811                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 812                                                 IB_QP_ALT_PATH                  |
 813                                                 IB_QP_ACCESS_FLAGS              |
 814                                                 IB_QP_MIN_RNR_TIMER             |
 815                                                 IB_QP_PATH_MIG_STATE),
 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                 [IB_QPS_SQD]   = {
 823                         .valid = 1,
 824                         .opt_param = {
 825                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 826                                                 IB_QP_QKEY),
 827                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 828                                                 IB_QP_ALT_PATH                  |
 829                                                 IB_QP_ACCESS_FLAGS              |
 830                                                 IB_QP_PKEY_INDEX                |
 831                                                 IB_QP_PATH_MIG_STATE),
 832                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 833                                                 IB_QP_AV                        |
 834                                                 IB_QP_TIMEOUT                   |
 835                                                 IB_QP_RETRY_CNT                 |
 836                                                 IB_QP_RNR_RETRY                 |
 837                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 838                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 839                                                 IB_QP_ALT_PATH                  |
 840                                                 IB_QP_ACCESS_FLAGS              |
 841                                                 IB_QP_PKEY_INDEX                |
 842                                                 IB_QP_MIN_RNR_TIMER             |
 843                                                 IB_QP_PATH_MIG_STATE),
 844                                 [IB_QPT_XRC_INI] = (IB_QP_PORT                  |
 845                                                 IB_QP_AV                        |
 846                                                 IB_QP_TIMEOUT                   |
 847                                                 IB_QP_RETRY_CNT                 |
 848                                                 IB_QP_RNR_RETRY                 |
 849                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 850                                                 IB_QP_ALT_PATH                  |
 851                                                 IB_QP_ACCESS_FLAGS              |
 852                                                 IB_QP_PKEY_INDEX                |
 853                                                 IB_QP_PATH_MIG_STATE),
 854                                 [IB_QPT_XRC_TGT] = (IB_QP_PORT                  |
 855                                                 IB_QP_AV                        |
 856                                                 IB_QP_TIMEOUT                   |
 857                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 858                                                 IB_QP_ALT_PATH                  |
 859                                                 IB_QP_ACCESS_FLAGS              |
 860                                                 IB_QP_PKEY_INDEX                |
 861                                                 IB_QP_MIN_RNR_TIMER             |
 862                                                 IB_QP_PATH_MIG_STATE),
 863                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 864                                                 IB_QP_QKEY),
 865                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 866                                                 IB_QP_QKEY),
 867                         }
 868                 }
 869         },
 870         [IB_QPS_SQE]   = {
 871                 [IB_QPS_RESET] = { .valid = 1 },
 872                 [IB_QPS_ERR] =   { .valid = 1 },
 873                 [IB_QPS_RTS]   = {
 874                         .valid = 1,
 875                         .opt_param = {
 876                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 877                                                 IB_QP_QKEY),
 878                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 879                                                 IB_QP_ACCESS_FLAGS),
 880                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 881                                                 IB_QP_QKEY),
 882                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 883                                                 IB_QP_QKEY),
 884                         }
 885                 }
 886         },
 887         [IB_QPS_ERR] = {
 888                 [IB_QPS_RESET] = { .valid = 1 },
 889                 [IB_QPS_ERR] =   { .valid = 1 }
 890         }
 891 };
 892
 893 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 894                        enum ib_qp_type type, enum ib_qp_attr_mask mask,
 895                        enum rdma_link_layer ll)
 896 {
 897         enum ib_qp_attr_mask req_param, opt_param;
 898
 899         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 900             next_state < 0 || next_state > IB_QPS_ERR)
 901                 return 0;
 902
 903         if (mask & IB_QP_CUR_STATE  &&
 904             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 905             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 906                 return 0;
 907
 908         if (!qp_state_table[cur_state][next_state].valid)
 909                 return 0;
 910
 911         req_param = qp_state_table[cur_state][next_state].req_param[type];
 912         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 913
 914         if (ll == IB_LINK_LAYER_ETHERNET) {
 915                 req_param |= qp_state_table[cur_state][next_state].
 916                         req_param_add_eth[type];
 917                 opt_param |= qp_state_table[cur_state][next_state].
 918                         opt_param_add_eth[type];
 919         }
 920
 921         if ((mask & req_param) != req_param)
 922                 return 0;
 923
 924         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 925                 return 0;
 926
 927         return 1;
 928 }
 929 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 930
 931 int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
 932                             struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 933 {
 934         int           ret = 0;
 935         union ib_gid  sgid;
 936
 937         if ((*qp_attr_mask & IB_QP_AV)  &&
 938             (rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))) {
 939                 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
 940                                    qp_attr->ah_attr.grh.sgid_index, &sgid);
 941                 if (ret)
 942                         goto out;
 943                 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
 944                         rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
 945                         rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
 946                         if (!(*qp_attr_mask & IB_QP_VID))
 947                                 qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
 948                 } else {
 949                         ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
 950                                         qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
 951                         if (ret)
 952                                 goto out;
 953                         ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
 954                         if (ret)
 955                                 goto out;
 956                 }
 957                 *qp_attr_mask |= IB_QP_SMAC;
 958                 if (qp_attr->vlan_id < 0xFFFF)
 959                         *qp_attr_mask |= IB_QP_VID;
 960         }
 961 out:
 962         return ret;
 963 }
 964 EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
 965
 966
 967 int ib_modify_qp(struct ib_qp *qp,
 968                  struct ib_qp_attr *qp_attr,
 969                  int qp_attr_mask)
 970 {
 971         int ret;
 972
 973         ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
 974         if (ret)
 975                 return ret;
 976
 977         return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
 978 }
 979 EXPORT_SYMBOL(ib_modify_qp);
 980
 981 int ib_query_qp(struct ib_qp *qp,
 982                 struct ib_qp_attr *qp_attr,
 983                 int qp_attr_mask,
 984                 struct ib_qp_init_attr *qp_init_attr)
 985 {
 986         return qp->device->query_qp ?
 987                 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
 988                 -ENOSYS;
 989 }
 990 EXPORT_SYMBOL(ib_query_qp);
 991
 992 int ib_close_qp(struct ib_qp *qp)
 993 {
 994         struct ib_qp *real_qp;
 995         unsigned long flags;
 996
 997         real_qp = qp->real_qp;
 998         if (real_qp == qp)
 999                 return -EINVAL;
1000
1001         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1002         list_del(&qp->open_list);
1003         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1004
1005         atomic_dec(&real_qp->usecnt);
1006         kfree(qp);
1007
1008         return 0;
1009 }
1010 EXPORT_SYMBOL(ib_close_qp);
1011
1012 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1013 {
1014         struct ib_xrcd *xrcd;
1015         struct ib_qp *real_qp;
1016         int ret;
1017
1018         real_qp = qp->real_qp;
1019         xrcd = real_qp->xrcd;
1020
1021         mutex_lock(&xrcd->tgt_qp_mutex);
1022         ib_close_qp(qp);
1023         if (atomic_read(&real_qp->usecnt) == 0)
1024                 list_del(&real_qp->xrcd_list);
1025         else
1026                 real_qp = NULL;
1027         mutex_unlock(&xrcd->tgt_qp_mutex);
1028
1029         if (real_qp) {
1030                 ret = ib_destroy_qp(real_qp);
1031                 if (!ret)
1032                         atomic_dec(&xrcd->usecnt);
1033                 else
1034                         __ib_insert_xrcd_qp(xrcd, real_qp);
1035         }
1036
1037         return 0;
1038 }
1039
1040 int ib_destroy_qp(struct ib_qp *qp)
1041 {
1042         struct ib_pd *pd;
1043         struct ib_cq *scq, *rcq;
1044         struct ib_srq *srq;
1045         int ret;
1046
1047         if (atomic_read(&qp->usecnt))
1048                 return -EBUSY;
1049
1050         if (qp->real_qp != qp)
1051                 return __ib_destroy_shared_qp(qp);
1052
1053         pd   = qp->pd;
1054         scq  = qp->send_cq;
1055         rcq  = qp->recv_cq;
1056         srq  = qp->srq;
1057
1058         ret = qp->device->destroy_qp(qp);
1059         if (!ret) {
1060                 if (pd)
1061                         atomic_dec(&pd->usecnt);
1062                 if (scq)
1063                         atomic_dec(&scq->usecnt);
1064                 if (rcq)
1065                         atomic_dec(&rcq->usecnt);
1066                 if (srq)
1067                         atomic_dec(&srq->usecnt);
1068         }
1069
1070         return ret;
1071 }
1072 EXPORT_SYMBOL(ib_destroy_qp);
1073
1074 /* Completion queues */
1075
1076 struct ib_cq *ib_create_cq(struct ib_device *device,
1077                            ib_comp_handler comp_handler,
1078                            void (*event_handler)(struct ib_event *, void *),
1079                            void *cq_context,
1080                            const struct ib_cq_init_attr *cq_attr)
1081 {
1082         struct ib_cq *cq;
1083
1084         cq = device->create_cq(device, cq_attr, NULL, NULL);
1085
1086         if (!IS_ERR(cq)) {
1087                 cq->device        = device;
1088                 cq->uobject       = NULL;
1089                 cq->comp_handler  = comp_handler;
1090                 cq->event_handler = event_handler;
1091                 cq->cq_context    = cq_context;
1092                 atomic_set(&cq->usecnt, 0);
1093         }
1094
1095         return cq;
1096 }
1097 EXPORT_SYMBOL(ib_create_cq);
1098
1099 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1100 {
1101         return cq->device->modify_cq ?
1102                 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1103 }
1104 EXPORT_SYMBOL(ib_modify_cq);
1105
1106 int ib_destroy_cq(struct ib_cq *cq)
1107 {
1108         if (atomic_read(&cq->usecnt))
1109                 return -EBUSY;
1110
1111         return cq->device->destroy_cq(cq);
1112 }
1113 EXPORT_SYMBOL(ib_destroy_cq);
1114
1115 int ib_resize_cq(struct ib_cq *cq, int cqe)
1116 {
1117         return cq->device->resize_cq ?
1118                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1119 }
1120 EXPORT_SYMBOL(ib_resize_cq);
1121
1122 /* Memory regions */
1123
1124 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1125 {
1126         struct ib_mr *mr;
1127         int err;
1128
1129         err = ib_check_mr_access(mr_access_flags);
1130         if (err)
1131                 return ERR_PTR(err);
1132
1133         mr = pd->device->get_dma_mr(pd, mr_access_flags);
1134
1135         if (!IS_ERR(mr)) {
1136                 mr->device  = pd->device;
1137                 mr->pd      = pd;
1138                 mr->uobject = NULL;
1139                 atomic_inc(&pd->usecnt);
1140                 atomic_set(&mr->usecnt, 0);
1141         }
1142
1143         return mr;
1144 }
1145 EXPORT_SYMBOL(ib_get_dma_mr);
1146
1147 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
1148                              struct ib_phys_buf *phys_buf_array,
1149                              int num_phys_buf,
1150                              int mr_access_flags,
1151                              u64 *iova_start)
1152 {
1153         struct ib_mr *mr;
1154         int err;
1155
1156         err = ib_check_mr_access(mr_access_flags);
1157         if (err)
1158                 return ERR_PTR(err);
1159
1160         if (!pd->device->reg_phys_mr)
1161                 return ERR_PTR(-ENOSYS);
1162
1163         mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
1164                                      mr_access_flags, iova_start);
1165
1166         if (!IS_ERR(mr)) {
1167                 mr->device  = pd->device;
1168                 mr->pd      = pd;
1169                 mr->uobject = NULL;
1170                 atomic_inc(&pd->usecnt);
1171                 atomic_set(&mr->usecnt, 0);
1172         }
1173
1174         return mr;
1175 }
1176 EXPORT_SYMBOL(ib_reg_phys_mr);
1177
1178 int ib_rereg_phys_mr(struct ib_mr *mr,
1179                      int mr_rereg_mask,
1180                      struct ib_pd *pd,
1181                      struct ib_phys_buf *phys_buf_array,
1182                      int num_phys_buf,
1183                      int mr_access_flags,
1184                      u64 *iova_start)
1185 {
1186         struct ib_pd *old_pd;
1187         int ret;
1188
1189         ret = ib_check_mr_access(mr_access_flags);
1190         if (ret)
1191                 return ret;
1192
1193         if (!mr->device->rereg_phys_mr)
1194                 return -ENOSYS;
1195
1196         if (atomic_read(&mr->usecnt))
1197                 return -EBUSY;
1198
1199         old_pd = mr->pd;
1200
1201         ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1202                                         phys_buf_array, num_phys_buf,
1203                                         mr_access_flags, iova_start);
1204
1205         if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1206                 atomic_dec(&old_pd->usecnt);
1207                 atomic_inc(&pd->usecnt);
1208         }
1209
1210         return ret;
1211 }
1212 EXPORT_SYMBOL(ib_rereg_phys_mr);
1213
1214 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1215 {
1216         return mr->device->query_mr ?
1217                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1218 }
1219 EXPORT_SYMBOL(ib_query_mr);
1220
1221 int ib_dereg_mr(struct ib_mr *mr)
1222 {
1223         struct ib_pd *pd;
1224         int ret;
1225
1226         if (atomic_read(&mr->usecnt))
1227                 return -EBUSY;
1228
1229         pd = mr->pd;
1230         ret = mr->device->dereg_mr(mr);
1231         if (!ret)
1232                 atomic_dec(&pd->usecnt);
1233
1234         return ret;
1235 }
1236 EXPORT_SYMBOL(ib_dereg_mr);
1237
1238 /**
1239  * ib_alloc_mr() - Allocates a memory region
1240  * @pd:            protection domain associated with the region
1241  * @mr_type:       memory region type
1242  * @max_num_sg:    maximum sg entries available for registration.
1243  *
1244  * Notes:
1245  * Memory registeration page/sg lists must not exceed max_num_sg.
1246  * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1247  * max_num_sg * used_page_size.
1248  *
1249  */
1250 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1251                           enum ib_mr_type mr_type,
1252                           u32 max_num_sg)
1253 {
1254         struct ib_mr *mr;
1255
1256         if (!pd->device->alloc_mr)
1257                 return ERR_PTR(-ENOSYS);
1258
1259         mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1260         if (!IS_ERR(mr)) {
1261                 mr->device  = pd->device;
1262                 mr->pd      = pd;
1263                 mr->uobject = NULL;
1264                 atomic_inc(&pd->usecnt);
1265                 atomic_set(&mr->usecnt, 0);
1266         }
1267
1268         return mr;
1269 }
1270 EXPORT_SYMBOL(ib_alloc_mr);
1271
1272 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1273                                                           int max_page_list_len)
1274 {
1275         struct ib_fast_reg_page_list *page_list;
1276
1277         if (!device->alloc_fast_reg_page_list)
1278                 return ERR_PTR(-ENOSYS);
1279
1280         page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1281
1282         if (!IS_ERR(page_list)) {
1283                 page_list->device = device;
1284                 page_list->max_page_list_len = max_page_list_len;
1285         }
1286
1287         return page_list;
1288 }
1289 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1290
1291 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1292 {
1293         page_list->device->free_fast_reg_page_list(page_list);
1294 }
1295 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1296
1297 /* Memory windows */
1298
1299 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1300 {
1301         struct ib_mw *mw;
1302
1303         if (!pd->device->alloc_mw)
1304                 return ERR_PTR(-ENOSYS);
1305
1306         mw = pd->device->alloc_mw(pd, type);
1307         if (!IS_ERR(mw)) {
1308                 mw->device  = pd->device;
1309                 mw->pd      = pd;
1310                 mw->uobject = NULL;
1311                 mw->type    = type;
1312                 atomic_inc(&pd->usecnt);
1313         }
1314
1315         return mw;
1316 }
1317 EXPORT_SYMBOL(ib_alloc_mw);
1318
1319 int ib_dealloc_mw(struct ib_mw *mw)
1320 {
1321         struct ib_pd *pd;
1322         int ret;
1323
1324         pd = mw->pd;
1325         ret = mw->device->dealloc_mw(mw);
1326         if (!ret)
1327                 atomic_dec(&pd->usecnt);
1328
1329         return ret;
1330 }
1331 EXPORT_SYMBOL(ib_dealloc_mw);
1332
1333 /* "Fast" memory regions */
1334
1335 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1336                             int mr_access_flags,
1337                             struct ib_fmr_attr *fmr_attr)
1338 {
1339         struct ib_fmr *fmr;
1340
1341         if (!pd->device->alloc_fmr)
1342                 return ERR_PTR(-ENOSYS);
1343
1344         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1345         if (!IS_ERR(fmr)) {
1346                 fmr->device = pd->device;
1347                 fmr->pd     = pd;
1348                 atomic_inc(&pd->usecnt);
1349         }
1350
1351         return fmr;
1352 }
1353 EXPORT_SYMBOL(ib_alloc_fmr);
1354
1355 int ib_unmap_fmr(struct list_head *fmr_list)
1356 {
1357         struct ib_fmr *fmr;
1358
1359         if (list_empty(fmr_list))
1360                 return 0;
1361
1362         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1363         return fmr->device->unmap_fmr(fmr_list);
1364 }
1365 EXPORT_SYMBOL(ib_unmap_fmr);
1366
1367 int ib_dealloc_fmr(struct ib_fmr *fmr)
1368 {
1369         struct ib_pd *pd;
1370         int ret;
1371
1372         pd = fmr->pd;
1373         ret = fmr->device->dealloc_fmr(fmr);
1374         if (!ret)
1375                 atomic_dec(&pd->usecnt);
1376
1377         return ret;
1378 }
1379 EXPORT_SYMBOL(ib_dealloc_fmr);
1380
1381 /* Multicast groups */
1382
1383 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1384 {
1385         int ret;
1386
1387         if (!qp->device->attach_mcast)
1388                 return -ENOSYS;
1389         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1390                 return -EINVAL;
1391
1392         ret = qp->device->attach_mcast(qp, gid, lid);
1393         if (!ret)
1394                 atomic_inc(&qp->usecnt);
1395         return ret;
1396 }
1397 EXPORT_SYMBOL(ib_attach_mcast);
1398
1399 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1400 {
1401         int ret;
1402
1403         if (!qp->device->detach_mcast)
1404                 return -ENOSYS;
1405         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1406                 return -EINVAL;
1407
1408         ret = qp->device->detach_mcast(qp, gid, lid);
1409         if (!ret)
1410                 atomic_dec(&qp->usecnt);
1411         return ret;
1412 }
1413 EXPORT_SYMBOL(ib_detach_mcast);
1414
1415 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1416 {
1417         struct ib_xrcd *xrcd;
1418
1419         if (!device->alloc_xrcd)
1420                 return ERR_PTR(-ENOSYS);
1421
1422         xrcd = device->alloc_xrcd(device, NULL, NULL);
1423         if (!IS_ERR(xrcd)) {
1424                 xrcd->device = device;
1425                 xrcd->inode = NULL;
1426                 atomic_set(&xrcd->usecnt, 0);
1427                 mutex_init(&xrcd->tgt_qp_mutex);
1428                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1429         }
1430
1431         return xrcd;
1432 }
1433 EXPORT_SYMBOL(ib_alloc_xrcd);
1434
1435 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1436 {
1437         struct ib_qp *qp;
1438         int ret;
1439
1440         if (atomic_read(&xrcd->usecnt))
1441                 return -EBUSY;
1442
1443         while (!list_empty(&xrcd->tgt_qp_list)) {
1444                 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1445                 ret = ib_destroy_qp(qp);
1446                 if (ret)
1447                         return ret;
1448         }
1449
1450         return xrcd->device->dealloc_xrcd(xrcd);
1451 }
1452 EXPORT_SYMBOL(ib_dealloc_xrcd);
1453
1454 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1455                                struct ib_flow_attr *flow_attr,
1456                                int domain)
1457 {
1458         struct ib_flow *flow_id;
1459         if (!qp->device->create_flow)
1460                 return ERR_PTR(-ENOSYS);
1461
1462         flow_id = qp->device->create_flow(qp, flow_attr, domain);
1463         if (!IS_ERR(flow_id))
1464                 atomic_inc(&qp->usecnt);
1465         return flow_id;
1466 }
1467 EXPORT_SYMBOL(ib_create_flow);
1468
1469 int ib_destroy_flow(struct ib_flow *flow_id)
1470 {
1471         int err;
1472         struct ib_qp *qp = flow_id->qp;
1473
1474         err = qp->device->destroy_flow(flow_id);
1475         if (!err)
1476                 atomic_dec(&qp->usecnt);
1477         return err;
1478 }
1479 EXPORT_SYMBOL(ib_destroy_flow);
1480
1481 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1482                        struct ib_mr_status *mr_status)
1483 {
1484         return mr->device->check_mr_status ?
1485                 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1486 }
1487 EXPORT_SYMBOL(ib_check_mr_status);