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 /**
 217  * ib_alloc_pd - Allocates an unused protection domain.
 218  * @device: The device on which to allocate the protection domain.
 219  *
 220  * A protection domain object provides an association between QPs, shared
 221  * receive queues, address handles, memory regions, and memory windows.
 222  *
 223  * Every PD has a local_dma_lkey which can be used as the lkey value for local
 224  * memory operations.
 225  */
 226 struct ib_pd *ib_alloc_pd(struct ib_device *device)
 227 {
 228         struct ib_pd *pd;
 229         struct ib_device_attr devattr;
 230         int rc;
 231
 232         rc = ib_query_device(device, &devattr);
 233         if (rc)
 234                 return ERR_PTR(rc);
 235
 236         pd = device->alloc_pd(device, NULL, NULL);
 237         if (IS_ERR(pd))
 238                 return pd;
 239
 240         pd->device = device;
 241         pd->uobject = NULL;
 242         pd->local_mr = NULL;
 243         atomic_set(&pd->usecnt, 0);
 244
 245         if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
 246                 pd->local_dma_lkey = device->local_dma_lkey;
 247         else {
 248                 struct ib_mr *mr;
 249
 250                 mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
 251                 if (IS_ERR(mr)) {
 252                         ib_dealloc_pd(pd);
 253                         return (struct ib_pd *)mr;
 254                 }
 255
 256                 pd->local_mr = mr;
 257                 pd->local_dma_lkey = pd->local_mr->lkey;
 258         }
 259         return pd;
 260 }
 261 EXPORT_SYMBOL(ib_alloc_pd);
 262
 263 /**
 264  * ib_dealloc_pd - Deallocates a protection domain.
 265  * @pd: The protection domain to deallocate.
 266  *
 267  * It is an error to call this function while any resources in the pd still
 268  * exist.  The caller is responsible to synchronously destroy them and
 269  * guarantee no new allocations will happen.
 270  */
 271 void ib_dealloc_pd(struct ib_pd *pd)
 272 {
 273         int ret;
 274
 275         if (pd->local_mr) {
 276                 ret = ib_dereg_mr(pd->local_mr);
 277                 WARN_ON(ret);
 278                 pd->local_mr = NULL;
 279         }
 280
 281         /* uverbs manipulates usecnt with proper locking, while the kabi
 282            requires the caller to guarantee we can't race here. */
 283         WARN_ON(atomic_read(&pd->usecnt));
 284
 285         /* Making delalloc_pd a void return is a WIP, no driver should return
 286            an error here. */
 287         ret = pd->device->dealloc_pd(pd);
 288         WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
 289 }
 290 EXPORT_SYMBOL(ib_dealloc_pd);
 291
 292 /* Address handles */
 293
 294 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 295 {
 296         struct ib_ah *ah;
 297
 298         ah = pd->device->create_ah(pd, ah_attr);
 299
 300         if (!IS_ERR(ah)) {
 301                 ah->device  = pd->device;
 302                 ah->pd      = pd;
 303                 ah->uobject = NULL;
 304                 atomic_inc(&pd->usecnt);
 305         }
 306
 307         return ah;
 308 }
 309 EXPORT_SYMBOL(ib_create_ah);
 310
 311 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
 312                        const struct ib_wc *wc, const struct ib_grh *grh,
 313                        struct ib_ah_attr *ah_attr)
 314 {
 315         u32 flow_class;
 316         u16 gid_index;
 317         int ret;
 318
 319         memset(ah_attr, 0, sizeof *ah_attr);
 320         if (rdma_cap_eth_ah(device, port_num)) {
 321                 if (!(wc->wc_flags & IB_WC_GRH))
 322                         return -EPROTOTYPE;
 323
 324                 if (wc->wc_flags & IB_WC_WITH_SMAC &&
 325                     wc->wc_flags & IB_WC_WITH_VLAN) {
 326                         memcpy(ah_attr->dmac, wc->smac, ETH_ALEN);
 327                         ah_attr->vlan_id = wc->vlan_id;
 328                 } else {
 329                         ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid,
 330                                         ah_attr->dmac, &ah_attr->vlan_id);
 331                         if (ret)
 332                                 return ret;
 333                 }
 334         } else {
 335                 ah_attr->vlan_id = 0xffff;
 336         }
 337
 338         ah_attr->dlid = wc->slid;
 339         ah_attr->sl = wc->sl;
 340         ah_attr->src_path_bits = wc->dlid_path_bits;
 341         ah_attr->port_num = port_num;
 342
 343         if (wc->wc_flags & IB_WC_GRH) {
 344                 ah_attr->ah_flags = IB_AH_GRH;
 345                 ah_attr->grh.dgid = grh->sgid;
 346
 347                 ret = ib_find_cached_gid(device, &grh->dgid,
 348                                          NULL, &port_num, &gid_index);
 349                 if (ret)
 350                         return ret;
 351
 352                 ah_attr->grh.sgid_index = (u8) gid_index;
 353                 flow_class = be32_to_cpu(grh->version_tclass_flow);
 354                 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
 355                 ah_attr->grh.hop_limit = 0xFF;
 356                 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
 357         }
 358         return 0;
 359 }
 360 EXPORT_SYMBOL(ib_init_ah_from_wc);
 361
 362 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
 363                                    const struct ib_grh *grh, u8 port_num)
 364 {
 365         struct ib_ah_attr ah_attr;
 366         int ret;
 367
 368         ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
 369         if (ret)
 370                 return ERR_PTR(ret);
 371
 372         return ib_create_ah(pd, &ah_attr);
 373 }
 374 EXPORT_SYMBOL(ib_create_ah_from_wc);
 375
 376 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 377 {
 378         return ah->device->modify_ah ?
 379                 ah->device->modify_ah(ah, ah_attr) :
 380                 -ENOSYS;
 381 }
 382 EXPORT_SYMBOL(ib_modify_ah);
 383
 384 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 385 {
 386         return ah->device->query_ah ?
 387                 ah->device->query_ah(ah, ah_attr) :
 388                 -ENOSYS;
 389 }
 390 EXPORT_SYMBOL(ib_query_ah);
 391
 392 int ib_destroy_ah(struct ib_ah *ah)
 393 {
 394         struct ib_pd *pd;
 395         int ret;
 396
 397         pd = ah->pd;
 398         ret = ah->device->destroy_ah(ah);
 399         if (!ret)
 400                 atomic_dec(&pd->usecnt);
 401
 402         return ret;
 403 }
 404 EXPORT_SYMBOL(ib_destroy_ah);
 405
 406 /* Shared receive queues */
 407
 408 struct ib_srq *ib_create_srq(struct ib_pd *pd,
 409                              struct ib_srq_init_attr *srq_init_attr)
 410 {
 411         struct ib_srq *srq;
 412
 413         if (!pd->device->create_srq)
 414                 return ERR_PTR(-ENOSYS);
 415
 416         srq = pd->device->create_srq(pd, srq_init_attr, NULL);
 417
 418         if (!IS_ERR(srq)) {
 419                 srq->device        = pd->device;
 420                 srq->pd            = pd;
 421                 srq->uobject       = NULL;
 422                 srq->event_handler = srq_init_attr->event_handler;
 423                 srq->srq_context   = srq_init_attr->srq_context;
 424                 srq->srq_type      = srq_init_attr->srq_type;
 425                 if (srq->srq_type == IB_SRQT_XRC) {
 426                         srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
 427                         srq->ext.xrc.cq   = srq_init_attr->ext.xrc.cq;
 428                         atomic_inc(&srq->ext.xrc.xrcd->usecnt);
 429                         atomic_inc(&srq->ext.xrc.cq->usecnt);
 430                 }
 431                 atomic_inc(&pd->usecnt);
 432                 atomic_set(&srq->usecnt, 0);
 433         }
 434
 435         return srq;
 436 }
 437 EXPORT_SYMBOL(ib_create_srq);
 438
 439 int ib_modify_srq(struct ib_srq *srq,
 440                   struct ib_srq_attr *srq_attr,
 441                   enum ib_srq_attr_mask srq_attr_mask)
 442 {
 443         return srq->device->modify_srq ?
 444                 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
 445                 -ENOSYS;
 446 }
 447 EXPORT_SYMBOL(ib_modify_srq);
 448
 449 int ib_query_srq(struct ib_srq *srq,
 450                  struct ib_srq_attr *srq_attr)
 451 {
 452         return srq->device->query_srq ?
 453                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 454 }
 455 EXPORT_SYMBOL(ib_query_srq);
 456
 457 int ib_destroy_srq(struct ib_srq *srq)
 458 {
 459         struct ib_pd *pd;
 460         enum ib_srq_type srq_type;
 461         struct ib_xrcd *uninitialized_var(xrcd);
 462         struct ib_cq *uninitialized_var(cq);
 463         int ret;
 464
 465         if (atomic_read(&srq->usecnt))
 466                 return -EBUSY;
 467
 468         pd = srq->pd;
 469         srq_type = srq->srq_type;
 470         if (srq_type == IB_SRQT_XRC) {
 471                 xrcd = srq->ext.xrc.xrcd;
 472                 cq = srq->ext.xrc.cq;
 473         }
 474
 475         ret = srq->device->destroy_srq(srq);
 476         if (!ret) {
 477                 atomic_dec(&pd->usecnt);
 478                 if (srq_type == IB_SRQT_XRC) {
 479                         atomic_dec(&xrcd->usecnt);
 480                         atomic_dec(&cq->usecnt);
 481                 }
 482         }
 483
 484         return ret;
 485 }
 486 EXPORT_SYMBOL(ib_destroy_srq);
 487
 488 /* Queue pairs */
 489
 490 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
 491 {
 492         struct ib_qp *qp = context;
 493         unsigned long flags;
 494
 495         spin_lock_irqsave(&qp->device->event_handler_lock, flags);
 496         list_for_each_entry(event->element.qp, &qp->open_list, open_list)
 497                 if (event->element.qp->event_handler)
 498                         event->element.qp->event_handler(event, event->element.qp->qp_context);
 499         spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
 500 }
 501
 502 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
 503 {
 504         mutex_lock(&xrcd->tgt_qp_mutex);
 505         list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
 506         mutex_unlock(&xrcd->tgt_qp_mutex);
 507 }
 508
 509 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
 510                                   void (*event_handler)(struct ib_event *, void *),
 511                                   void *qp_context)
 512 {
 513         struct ib_qp *qp;
 514         unsigned long flags;
 515
 516         qp = kzalloc(sizeof *qp, GFP_KERNEL);
 517         if (!qp)
 518                 return ERR_PTR(-ENOMEM);
 519
 520         qp->real_qp = real_qp;
 521         atomic_inc(&real_qp->usecnt);
 522         qp->device = real_qp->device;
 523         qp->event_handler = event_handler;
 524         qp->qp_context = qp_context;
 525         qp->qp_num = real_qp->qp_num;
 526         qp->qp_type = real_qp->qp_type;
 527
 528         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
 529         list_add(&qp->open_list, &real_qp->open_list);
 530         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
 531
 532         return qp;
 533 }
 534
 535 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
 536                          struct ib_qp_open_attr *qp_open_attr)
 537 {
 538         struct ib_qp *qp, *real_qp;
 539
 540         if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
 541                 return ERR_PTR(-EINVAL);
 542
 543         qp = ERR_PTR(-EINVAL);
 544         mutex_lock(&xrcd->tgt_qp_mutex);
 545         list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
 546                 if (real_qp->qp_num == qp_open_attr->qp_num) {
 547                         qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
 548                                           qp_open_attr->qp_context);
 549                         break;
 550                 }
 551         }
 552         mutex_unlock(&xrcd->tgt_qp_mutex);
 553         return qp;
 554 }
 555 EXPORT_SYMBOL(ib_open_qp);
 556
 557 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 558                            struct ib_qp_init_attr *qp_init_attr)
 559 {
 560         struct ib_qp *qp, *real_qp;
 561         struct ib_device *device;
 562
 563         device = pd ? pd->device : qp_init_attr->xrcd->device;
 564         qp = device->create_qp(pd, qp_init_attr, NULL);
 565
 566         if (!IS_ERR(qp)) {
 567                 qp->device     = device;
 568                 qp->real_qp    = qp;
 569                 qp->uobject    = NULL;
 570                 qp->qp_type    = qp_init_attr->qp_type;
 571
 572                 atomic_set(&qp->usecnt, 0);
 573                 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
 574                         qp->event_handler = __ib_shared_qp_event_handler;
 575                         qp->qp_context = qp;
 576                         qp->pd = NULL;
 577                         qp->send_cq = qp->recv_cq = NULL;
 578                         qp->srq = NULL;
 579                         qp->xrcd = qp_init_attr->xrcd;
 580                         atomic_inc(&qp_init_attr->xrcd->usecnt);
 581                         INIT_LIST_HEAD(&qp->open_list);
 582
 583                         real_qp = qp;
 584                         qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
 585                                           qp_init_attr->qp_context);
 586                         if (!IS_ERR(qp))
 587                                 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
 588                         else
 589                                 real_qp->device->destroy_qp(real_qp);
 590                 } else {
 591                         qp->event_handler = qp_init_attr->event_handler;
 592                         qp->qp_context = qp_init_attr->qp_context;
 593                         if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
 594                                 qp->recv_cq = NULL;
 595                                 qp->srq = NULL;
 596                         } else {
 597                                 qp->recv_cq = qp_init_attr->recv_cq;
 598                                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 599                                 qp->srq = qp_init_attr->srq;
 600                                 if (qp->srq)
 601                                         atomic_inc(&qp_init_attr->srq->usecnt);
 602                         }
 603
 604                         qp->pd      = pd;
 605                         qp->send_cq = qp_init_attr->send_cq;
 606                         qp->xrcd    = NULL;
 607
 608                         atomic_inc(&pd->usecnt);
 609                         atomic_inc(&qp_init_attr->send_cq->usecnt);
 610                 }
 611         }
 612
 613         return qp;
 614 }
 615 EXPORT_SYMBOL(ib_create_qp);
 616
 617 static const struct {
 618         int                     valid;
 619         enum ib_qp_attr_mask    req_param[IB_QPT_MAX];
 620         enum ib_qp_attr_mask    req_param_add_eth[IB_QPT_MAX];
 621         enum ib_qp_attr_mask    opt_param[IB_QPT_MAX];
 622         enum ib_qp_attr_mask    opt_param_add_eth[IB_QPT_MAX];
 623 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 624         [IB_QPS_RESET] = {
 625                 [IB_QPS_RESET] = { .valid = 1 },
 626                 [IB_QPS_INIT]  = {
 627                         .valid = 1,
 628                         .req_param = {
 629                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 630                                                 IB_QP_PORT                      |
 631                                                 IB_QP_QKEY),
 632                                 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
 633                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 634                                                 IB_QP_PORT                      |
 635                                                 IB_QP_ACCESS_FLAGS),
 636                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 637                                                 IB_QP_PORT                      |
 638                                                 IB_QP_ACCESS_FLAGS),
 639                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 640                                                 IB_QP_PORT                      |
 641                                                 IB_QP_ACCESS_FLAGS),
 642                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 643                                                 IB_QP_PORT                      |
 644                                                 IB_QP_ACCESS_FLAGS),
 645                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 646                                                 IB_QP_QKEY),
 647                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 648                                                 IB_QP_QKEY),
 649                         }
 650                 },
 651         },
 652         [IB_QPS_INIT]  = {
 653                 [IB_QPS_RESET] = { .valid = 1 },
 654                 [IB_QPS_ERR] =   { .valid = 1 },
 655                 [IB_QPS_INIT]  = {
 656                         .valid = 1,
 657                         .opt_param = {
 658                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 659                                                 IB_QP_PORT                      |
 660                                                 IB_QP_QKEY),
 661                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 662                                                 IB_QP_PORT                      |
 663                                                 IB_QP_ACCESS_FLAGS),
 664                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 665                                                 IB_QP_PORT                      |
 666                                                 IB_QP_ACCESS_FLAGS),
 667                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 668                                                 IB_QP_PORT                      |
 669                                                 IB_QP_ACCESS_FLAGS),
 670                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 671                                                 IB_QP_PORT                      |
 672                                                 IB_QP_ACCESS_FLAGS),
 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                 },
 679                 [IB_QPS_RTR]   = {
 680                         .valid = 1,
 681                         .req_param = {
 682                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 683                                                 IB_QP_PATH_MTU                  |
 684                                                 IB_QP_DEST_QPN                  |
 685                                                 IB_QP_RQ_PSN),
 686                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 687                                                 IB_QP_PATH_MTU                  |
 688                                                 IB_QP_DEST_QPN                  |
 689                                                 IB_QP_RQ_PSN                    |
 690                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 691                                                 IB_QP_MIN_RNR_TIMER),
 692                                 [IB_QPT_XRC_INI] = (IB_QP_AV                    |
 693                                                 IB_QP_PATH_MTU                  |
 694                                                 IB_QP_DEST_QPN                  |
 695                                                 IB_QP_RQ_PSN),
 696                                 [IB_QPT_XRC_TGT] = (IB_QP_AV                    |
 697                                                 IB_QP_PATH_MTU                  |
 698                                                 IB_QP_DEST_QPN                  |
 699                                                 IB_QP_RQ_PSN                    |
 700                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 701                                                 IB_QP_MIN_RNR_TIMER),
 702                         },
 703                         .req_param_add_eth = {
 704                                 [IB_QPT_RC]  = (IB_QP_SMAC),
 705                                 [IB_QPT_UC]  = (IB_QP_SMAC),
 706                                 [IB_QPT_XRC_INI]  = (IB_QP_SMAC),
 707                                 [IB_QPT_XRC_TGT]  = (IB_QP_SMAC)
 708                         },
 709                         .opt_param = {
 710                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 711                                                  IB_QP_QKEY),
 712                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 713                                                  IB_QP_ACCESS_FLAGS             |
 714                                                  IB_QP_PKEY_INDEX),
 715                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 716                                                  IB_QP_ACCESS_FLAGS             |
 717                                                  IB_QP_PKEY_INDEX),
 718                                  [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH             |
 719                                                  IB_QP_ACCESS_FLAGS             |
 720                                                  IB_QP_PKEY_INDEX),
 721                                  [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH             |
 722                                                  IB_QP_ACCESS_FLAGS             |
 723                                                  IB_QP_PKEY_INDEX),
 724                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 725                                                  IB_QP_QKEY),
 726                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 727                                                  IB_QP_QKEY),
 728                          },
 729                         .opt_param_add_eth = {
 730                                 [IB_QPT_RC]  = (IB_QP_ALT_SMAC                  |
 731                                                 IB_QP_VID                       |
 732                                                 IB_QP_ALT_VID),
 733                                 [IB_QPT_UC]  = (IB_QP_ALT_SMAC                  |
 734                                                 IB_QP_VID                       |
 735                                                 IB_QP_ALT_VID),
 736                                 [IB_QPT_XRC_INI]  = (IB_QP_ALT_SMAC                     |
 737                                                 IB_QP_VID                       |
 738                                                 IB_QP_ALT_VID),
 739                                 [IB_QPT_XRC_TGT]  = (IB_QP_ALT_SMAC                     |
 740                                                 IB_QP_VID                       |
 741                                                 IB_QP_ALT_VID)
 742                         }
 743                 }
 744         },
 745         [IB_QPS_RTR]   = {
 746                 [IB_QPS_RESET] = { .valid = 1 },
 747                 [IB_QPS_ERR] =   { .valid = 1 },
 748                 [IB_QPS_RTS]   = {
 749                         .valid = 1,
 750                         .req_param = {
 751                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 752                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 753                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 754                                                 IB_QP_RETRY_CNT                 |
 755                                                 IB_QP_RNR_RETRY                 |
 756                                                 IB_QP_SQ_PSN                    |
 757                                                 IB_QP_MAX_QP_RD_ATOMIC),
 758                                 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT               |
 759                                                 IB_QP_RETRY_CNT                 |
 760                                                 IB_QP_RNR_RETRY                 |
 761                                                 IB_QP_SQ_PSN                    |
 762                                                 IB_QP_MAX_QP_RD_ATOMIC),
 763                                 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT               |
 764                                                 IB_QP_SQ_PSN),
 765                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 766                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 767                         },
 768                         .opt_param = {
 769                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 770                                                  IB_QP_QKEY),
 771                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 772                                                  IB_QP_ALT_PATH                 |
 773                                                  IB_QP_ACCESS_FLAGS             |
 774                                                  IB_QP_PATH_MIG_STATE),
 775                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 776                                                  IB_QP_ALT_PATH                 |
 777                                                  IB_QP_ACCESS_FLAGS             |
 778                                                  IB_QP_MIN_RNR_TIMER            |
 779                                                  IB_QP_PATH_MIG_STATE),
 780                                  [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE            |
 781                                                  IB_QP_ALT_PATH                 |
 782                                                  IB_QP_ACCESS_FLAGS             |
 783                                                  IB_QP_PATH_MIG_STATE),
 784                                  [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE            |
 785                                                  IB_QP_ALT_PATH                 |
 786                                                  IB_QP_ACCESS_FLAGS             |
 787                                                  IB_QP_MIN_RNR_TIMER            |
 788                                                  IB_QP_PATH_MIG_STATE),
 789                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 790                                                  IB_QP_QKEY),
 791                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 792                                                  IB_QP_QKEY),
 793                          }
 794                 }
 795         },
 796         [IB_QPS_RTS]   = {
 797                 [IB_QPS_RESET] = { .valid = 1 },
 798                 [IB_QPS_ERR] =   { .valid = 1 },
 799                 [IB_QPS_RTS]   = {
 800                         .valid = 1,
 801                         .opt_param = {
 802                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 803                                                 IB_QP_QKEY),
 804                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 805                                                 IB_QP_ACCESS_FLAGS              |
 806                                                 IB_QP_ALT_PATH                  |
 807                                                 IB_QP_PATH_MIG_STATE),
 808                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 809                                                 IB_QP_ACCESS_FLAGS              |
 810                                                 IB_QP_ALT_PATH                  |
 811                                                 IB_QP_PATH_MIG_STATE            |
 812                                                 IB_QP_MIN_RNR_TIMER),
 813                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 814                                                 IB_QP_ACCESS_FLAGS              |
 815                                                 IB_QP_ALT_PATH                  |
 816                                                 IB_QP_PATH_MIG_STATE),
 817                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 818                                                 IB_QP_ACCESS_FLAGS              |
 819                                                 IB_QP_ALT_PATH                  |
 820                                                 IB_QP_PATH_MIG_STATE            |
 821                                                 IB_QP_MIN_RNR_TIMER),
 822                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 823                                                 IB_QP_QKEY),
 824                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 825                                                 IB_QP_QKEY),
 826                         }
 827                 },
 828                 [IB_QPS_SQD]   = {
 829                         .valid = 1,
 830                         .opt_param = {
 831                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 832                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 833                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 834                                 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 835                                 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
 836                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 837                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 838                         }
 839                 },
 840         },
 841         [IB_QPS_SQD]   = {
 842                 [IB_QPS_RESET] = { .valid = 1 },
 843                 [IB_QPS_ERR] =   { .valid = 1 },
 844                 [IB_QPS_RTS]   = {
 845                         .valid = 1,
 846                         .opt_param = {
 847                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 848                                                 IB_QP_QKEY),
 849                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 850                                                 IB_QP_ALT_PATH                  |
 851                                                 IB_QP_ACCESS_FLAGS              |
 852                                                 IB_QP_PATH_MIG_STATE),
 853                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 854                                                 IB_QP_ALT_PATH                  |
 855                                                 IB_QP_ACCESS_FLAGS              |
 856                                                 IB_QP_MIN_RNR_TIMER             |
 857                                                 IB_QP_PATH_MIG_STATE),
 858                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 859                                                 IB_QP_ALT_PATH                  |
 860                                                 IB_QP_ACCESS_FLAGS              |
 861                                                 IB_QP_PATH_MIG_STATE),
 862                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 863                                                 IB_QP_ALT_PATH                  |
 864                                                 IB_QP_ACCESS_FLAGS              |
 865                                                 IB_QP_MIN_RNR_TIMER             |
 866                                                 IB_QP_PATH_MIG_STATE),
 867                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 868                                                 IB_QP_QKEY),
 869                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 870                                                 IB_QP_QKEY),
 871                         }
 872                 },
 873                 [IB_QPS_SQD]   = {
 874                         .valid = 1,
 875                         .opt_param = {
 876                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 877                                                 IB_QP_QKEY),
 878                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 879                                                 IB_QP_ALT_PATH                  |
 880                                                 IB_QP_ACCESS_FLAGS              |
 881                                                 IB_QP_PKEY_INDEX                |
 882                                                 IB_QP_PATH_MIG_STATE),
 883                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 884                                                 IB_QP_AV                        |
 885                                                 IB_QP_TIMEOUT                   |
 886                                                 IB_QP_RETRY_CNT                 |
 887                                                 IB_QP_RNR_RETRY                 |
 888                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 889                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 890                                                 IB_QP_ALT_PATH                  |
 891                                                 IB_QP_ACCESS_FLAGS              |
 892                                                 IB_QP_PKEY_INDEX                |
 893                                                 IB_QP_MIN_RNR_TIMER             |
 894                                                 IB_QP_PATH_MIG_STATE),
 895                                 [IB_QPT_XRC_INI] = (IB_QP_PORT                  |
 896                                                 IB_QP_AV                        |
 897                                                 IB_QP_TIMEOUT                   |
 898                                                 IB_QP_RETRY_CNT                 |
 899                                                 IB_QP_RNR_RETRY                 |
 900                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 901                                                 IB_QP_ALT_PATH                  |
 902                                                 IB_QP_ACCESS_FLAGS              |
 903                                                 IB_QP_PKEY_INDEX                |
 904                                                 IB_QP_PATH_MIG_STATE),
 905                                 [IB_QPT_XRC_TGT] = (IB_QP_PORT                  |
 906                                                 IB_QP_AV                        |
 907                                                 IB_QP_TIMEOUT                   |
 908                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 909                                                 IB_QP_ALT_PATH                  |
 910                                                 IB_QP_ACCESS_FLAGS              |
 911                                                 IB_QP_PKEY_INDEX                |
 912                                                 IB_QP_MIN_RNR_TIMER             |
 913                                                 IB_QP_PATH_MIG_STATE),
 914                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 915                                                 IB_QP_QKEY),
 916                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 917                                                 IB_QP_QKEY),
 918                         }
 919                 }
 920         },
 921         [IB_QPS_SQE]   = {
 922                 [IB_QPS_RESET] = { .valid = 1 },
 923                 [IB_QPS_ERR] =   { .valid = 1 },
 924                 [IB_QPS_RTS]   = {
 925                         .valid = 1,
 926                         .opt_param = {
 927                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 928                                                 IB_QP_QKEY),
 929                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 930                                                 IB_QP_ACCESS_FLAGS),
 931                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 932                                                 IB_QP_QKEY),
 933                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 934                                                 IB_QP_QKEY),
 935                         }
 936                 }
 937         },
 938         [IB_QPS_ERR] = {
 939                 [IB_QPS_RESET] = { .valid = 1 },
 940                 [IB_QPS_ERR] =   { .valid = 1 }
 941         }
 942 };
 943
 944 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 945                        enum ib_qp_type type, enum ib_qp_attr_mask mask,
 946                        enum rdma_link_layer ll)
 947 {
 948         enum ib_qp_attr_mask req_param, opt_param;
 949
 950         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 951             next_state < 0 || next_state > IB_QPS_ERR)
 952                 return 0;
 953
 954         if (mask & IB_QP_CUR_STATE  &&
 955             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 956             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 957                 return 0;
 958
 959         if (!qp_state_table[cur_state][next_state].valid)
 960                 return 0;
 961
 962         req_param = qp_state_table[cur_state][next_state].req_param[type];
 963         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 964
 965         if (ll == IB_LINK_LAYER_ETHERNET) {
 966                 req_param |= qp_state_table[cur_state][next_state].
 967                         req_param_add_eth[type];
 968                 opt_param |= qp_state_table[cur_state][next_state].
 969                         opt_param_add_eth[type];
 970         }
 971
 972         if ((mask & req_param) != req_param)
 973                 return 0;
 974
 975         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 976                 return 0;
 977
 978         return 1;
 979 }
 980 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 981
 982 int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
 983                             struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 984 {
 985         int           ret = 0;
 986         union ib_gid  sgid;
 987
 988         if ((*qp_attr_mask & IB_QP_AV)  &&
 989             (rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))) {
 990                 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
 991                                    qp_attr->ah_attr.grh.sgid_index, &sgid,
 992                                    NULL);
 993                 if (ret)
 994                         goto out;
 995                 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
 996                         rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
 997                         rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
 998                         if (!(*qp_attr_mask & IB_QP_VID))
 999                                 qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
1000                 } else {
1001                         ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
1002                                         qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
1003                         if (ret)
1004                                 goto out;
1005                         ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
1006                         if (ret)
1007                                 goto out;
1008                 }
1009                 *qp_attr_mask |= IB_QP_SMAC;
1010                 if (qp_attr->vlan_id < 0xFFFF)
1011                         *qp_attr_mask |= IB_QP_VID;
1012         }
1013 out:
1014         return ret;
1015 }
1016 EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
1017
1018
1019 int ib_modify_qp(struct ib_qp *qp,
1020                  struct ib_qp_attr *qp_attr,
1021                  int qp_attr_mask)
1022 {
1023         int ret;
1024
1025         ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
1026         if (ret)
1027                 return ret;
1028
1029         return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1030 }
1031 EXPORT_SYMBOL(ib_modify_qp);
1032
1033 int ib_query_qp(struct ib_qp *qp,
1034                 struct ib_qp_attr *qp_attr,
1035                 int qp_attr_mask,
1036                 struct ib_qp_init_attr *qp_init_attr)
1037 {
1038         return qp->device->query_qp ?
1039                 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1040                 -ENOSYS;
1041 }
1042 EXPORT_SYMBOL(ib_query_qp);
1043
1044 int ib_close_qp(struct ib_qp *qp)
1045 {
1046         struct ib_qp *real_qp;
1047         unsigned long flags;
1048
1049         real_qp = qp->real_qp;
1050         if (real_qp == qp)
1051                 return -EINVAL;
1052
1053         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1054         list_del(&qp->open_list);
1055         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1056
1057         atomic_dec(&real_qp->usecnt);
1058         kfree(qp);
1059
1060         return 0;
1061 }
1062 EXPORT_SYMBOL(ib_close_qp);
1063
1064 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1065 {
1066         struct ib_xrcd *xrcd;
1067         struct ib_qp *real_qp;
1068         int ret;
1069
1070         real_qp = qp->real_qp;
1071         xrcd = real_qp->xrcd;
1072
1073         mutex_lock(&xrcd->tgt_qp_mutex);
1074         ib_close_qp(qp);
1075         if (atomic_read(&real_qp->usecnt) == 0)
1076                 list_del(&real_qp->xrcd_list);
1077         else
1078                 real_qp = NULL;
1079         mutex_unlock(&xrcd->tgt_qp_mutex);
1080
1081         if (real_qp) {
1082                 ret = ib_destroy_qp(real_qp);
1083                 if (!ret)
1084                         atomic_dec(&xrcd->usecnt);
1085                 else
1086                         __ib_insert_xrcd_qp(xrcd, real_qp);
1087         }
1088
1089         return 0;
1090 }
1091
1092 int ib_destroy_qp(struct ib_qp *qp)
1093 {
1094         struct ib_pd *pd;
1095         struct ib_cq *scq, *rcq;
1096         struct ib_srq *srq;
1097         int ret;
1098
1099         if (atomic_read(&qp->usecnt))
1100                 return -EBUSY;
1101
1102         if (qp->real_qp != qp)
1103                 return __ib_destroy_shared_qp(qp);
1104
1105         pd   = qp->pd;
1106         scq  = qp->send_cq;
1107         rcq  = qp->recv_cq;
1108         srq  = qp->srq;
1109
1110         ret = qp->device->destroy_qp(qp);
1111         if (!ret) {
1112                 if (pd)
1113                         atomic_dec(&pd->usecnt);
1114                 if (scq)
1115                         atomic_dec(&scq->usecnt);
1116                 if (rcq)
1117                         atomic_dec(&rcq->usecnt);
1118                 if (srq)
1119                         atomic_dec(&srq->usecnt);
1120         }
1121
1122         return ret;
1123 }
1124 EXPORT_SYMBOL(ib_destroy_qp);
1125
1126 /* Completion queues */
1127
1128 struct ib_cq *ib_create_cq(struct ib_device *device,
1129                            ib_comp_handler comp_handler,
1130                            void (*event_handler)(struct ib_event *, void *),
1131                            void *cq_context,
1132                            const struct ib_cq_init_attr *cq_attr)
1133 {
1134         struct ib_cq *cq;
1135
1136         cq = device->create_cq(device, cq_attr, NULL, NULL);
1137
1138         if (!IS_ERR(cq)) {
1139                 cq->device        = device;
1140                 cq->uobject       = NULL;
1141                 cq->comp_handler  = comp_handler;
1142                 cq->event_handler = event_handler;
1143                 cq->cq_context    = cq_context;
1144                 atomic_set(&cq->usecnt, 0);
1145         }
1146
1147         return cq;
1148 }
1149 EXPORT_SYMBOL(ib_create_cq);
1150
1151 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1152 {
1153         return cq->device->modify_cq ?
1154                 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1155 }
1156 EXPORT_SYMBOL(ib_modify_cq);
1157
1158 int ib_destroy_cq(struct ib_cq *cq)
1159 {
1160         if (atomic_read(&cq->usecnt))
1161                 return -EBUSY;
1162
1163         return cq->device->destroy_cq(cq);
1164 }
1165 EXPORT_SYMBOL(ib_destroy_cq);
1166
1167 int ib_resize_cq(struct ib_cq *cq, int cqe)
1168 {
1169         return cq->device->resize_cq ?
1170                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1171 }
1172 EXPORT_SYMBOL(ib_resize_cq);
1173
1174 /* Memory regions */
1175
1176 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1177 {
1178         struct ib_mr *mr;
1179         int err;
1180
1181         err = ib_check_mr_access(mr_access_flags);
1182         if (err)
1183                 return ERR_PTR(err);
1184
1185         mr = pd->device->get_dma_mr(pd, mr_access_flags);
1186
1187         if (!IS_ERR(mr)) {
1188                 mr->device  = pd->device;
1189                 mr->pd      = pd;
1190                 mr->uobject = NULL;
1191                 atomic_inc(&pd->usecnt);
1192                 atomic_set(&mr->usecnt, 0);
1193         }
1194
1195         return mr;
1196 }
1197 EXPORT_SYMBOL(ib_get_dma_mr);
1198
1199 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1200 {
1201         return mr->device->query_mr ?
1202                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1203 }
1204 EXPORT_SYMBOL(ib_query_mr);
1205
1206 int ib_dereg_mr(struct ib_mr *mr)
1207 {
1208         struct ib_pd *pd;
1209         int ret;
1210
1211         if (atomic_read(&mr->usecnt))
1212                 return -EBUSY;
1213
1214         pd = mr->pd;
1215         ret = mr->device->dereg_mr(mr);
1216         if (!ret)
1217                 atomic_dec(&pd->usecnt);
1218
1219         return ret;
1220 }
1221 EXPORT_SYMBOL(ib_dereg_mr);
1222
1223 /**
1224  * ib_alloc_mr() - Allocates a memory region
1225  * @pd:            protection domain associated with the region
1226  * @mr_type:       memory region type
1227  * @max_num_sg:    maximum sg entries available for registration.
1228  *
1229  * Notes:
1230  * Memory registeration page/sg lists must not exceed max_num_sg.
1231  * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1232  * max_num_sg * used_page_size.
1233  *
1234  */
1235 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1236                           enum ib_mr_type mr_type,
1237                           u32 max_num_sg)
1238 {
1239         struct ib_mr *mr;
1240
1241         if (!pd->device->alloc_mr)
1242                 return ERR_PTR(-ENOSYS);
1243
1244         mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1245         if (!IS_ERR(mr)) {
1246                 mr->device  = pd->device;
1247                 mr->pd      = pd;
1248                 mr->uobject = NULL;
1249                 atomic_inc(&pd->usecnt);
1250                 atomic_set(&mr->usecnt, 0);
1251         }
1252
1253         return mr;
1254 }
1255 EXPORT_SYMBOL(ib_alloc_mr);
1256
1257 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1258                                                           int max_page_list_len)
1259 {
1260         struct ib_fast_reg_page_list *page_list;
1261
1262         if (!device->alloc_fast_reg_page_list)
1263                 return ERR_PTR(-ENOSYS);
1264
1265         page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1266
1267         if (!IS_ERR(page_list)) {
1268                 page_list->device = device;
1269                 page_list->max_page_list_len = max_page_list_len;
1270         }
1271
1272         return page_list;
1273 }
1274 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1275
1276 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1277 {
1278         page_list->device->free_fast_reg_page_list(page_list);
1279 }
1280 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1281
1282 /* Memory windows */
1283
1284 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1285 {
1286         struct ib_mw *mw;
1287
1288         if (!pd->device->alloc_mw)
1289                 return ERR_PTR(-ENOSYS);
1290
1291         mw = pd->device->alloc_mw(pd, type);
1292         if (!IS_ERR(mw)) {
1293                 mw->device  = pd->device;
1294                 mw->pd      = pd;
1295                 mw->uobject = NULL;
1296                 mw->type    = type;
1297                 atomic_inc(&pd->usecnt);
1298         }
1299
1300         return mw;
1301 }
1302 EXPORT_SYMBOL(ib_alloc_mw);
1303
1304 int ib_dealloc_mw(struct ib_mw *mw)
1305 {
1306         struct ib_pd *pd;
1307         int ret;
1308
1309         pd = mw->pd;
1310         ret = mw->device->dealloc_mw(mw);
1311         if (!ret)
1312                 atomic_dec(&pd->usecnt);
1313
1314         return ret;
1315 }
1316 EXPORT_SYMBOL(ib_dealloc_mw);
1317
1318 /* "Fast" memory regions */
1319
1320 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1321                             int mr_access_flags,
1322                             struct ib_fmr_attr *fmr_attr)
1323 {
1324         struct ib_fmr *fmr;
1325
1326         if (!pd->device->alloc_fmr)
1327                 return ERR_PTR(-ENOSYS);
1328
1329         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1330         if (!IS_ERR(fmr)) {
1331                 fmr->device = pd->device;
1332                 fmr->pd     = pd;
1333                 atomic_inc(&pd->usecnt);
1334         }
1335
1336         return fmr;
1337 }
1338 EXPORT_SYMBOL(ib_alloc_fmr);
1339
1340 int ib_unmap_fmr(struct list_head *fmr_list)
1341 {
1342         struct ib_fmr *fmr;
1343
1344         if (list_empty(fmr_list))
1345                 return 0;
1346
1347         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1348         return fmr->device->unmap_fmr(fmr_list);
1349 }
1350 EXPORT_SYMBOL(ib_unmap_fmr);
1351
1352 int ib_dealloc_fmr(struct ib_fmr *fmr)
1353 {
1354         struct ib_pd *pd;
1355         int ret;
1356
1357         pd = fmr->pd;
1358         ret = fmr->device->dealloc_fmr(fmr);
1359         if (!ret)
1360                 atomic_dec(&pd->usecnt);
1361
1362         return ret;
1363 }
1364 EXPORT_SYMBOL(ib_dealloc_fmr);
1365
1366 /* Multicast groups */
1367
1368 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1369 {
1370         int ret;
1371
1372         if (!qp->device->attach_mcast)
1373                 return -ENOSYS;
1374         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1375                 return -EINVAL;
1376
1377         ret = qp->device->attach_mcast(qp, gid, lid);
1378         if (!ret)
1379                 atomic_inc(&qp->usecnt);
1380         return ret;
1381 }
1382 EXPORT_SYMBOL(ib_attach_mcast);
1383
1384 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1385 {
1386         int ret;
1387
1388         if (!qp->device->detach_mcast)
1389                 return -ENOSYS;
1390         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1391                 return -EINVAL;
1392
1393         ret = qp->device->detach_mcast(qp, gid, lid);
1394         if (!ret)
1395                 atomic_dec(&qp->usecnt);
1396         return ret;
1397 }
1398 EXPORT_SYMBOL(ib_detach_mcast);
1399
1400 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1401 {
1402         struct ib_xrcd *xrcd;
1403
1404         if (!device->alloc_xrcd)
1405                 return ERR_PTR(-ENOSYS);
1406
1407         xrcd = device->alloc_xrcd(device, NULL, NULL);
1408         if (!IS_ERR(xrcd)) {
1409                 xrcd->device = device;
1410                 xrcd->inode = NULL;
1411                 atomic_set(&xrcd->usecnt, 0);
1412                 mutex_init(&xrcd->tgt_qp_mutex);
1413                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1414         }
1415
1416         return xrcd;
1417 }
1418 EXPORT_SYMBOL(ib_alloc_xrcd);
1419
1420 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1421 {
1422         struct ib_qp *qp;
1423         int ret;
1424
1425         if (atomic_read(&xrcd->usecnt))
1426                 return -EBUSY;
1427
1428         while (!list_empty(&xrcd->tgt_qp_list)) {
1429                 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1430                 ret = ib_destroy_qp(qp);
1431                 if (ret)
1432                         return ret;
1433         }
1434
1435         return xrcd->device->dealloc_xrcd(xrcd);
1436 }
1437 EXPORT_SYMBOL(ib_dealloc_xrcd);
1438
1439 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1440                                struct ib_flow_attr *flow_attr,
1441                                int domain)
1442 {
1443         struct ib_flow *flow_id;
1444         if (!qp->device->create_flow)
1445                 return ERR_PTR(-ENOSYS);
1446
1447         flow_id = qp->device->create_flow(qp, flow_attr, domain);
1448         if (!IS_ERR(flow_id))
1449                 atomic_inc(&qp->usecnt);
1450         return flow_id;
1451 }
1452 EXPORT_SYMBOL(ib_create_flow);
1453
1454 int ib_destroy_flow(struct ib_flow *flow_id)
1455 {
1456         int err;
1457         struct ib_qp *qp = flow_id->qp;
1458
1459         err = qp->device->destroy_flow(flow_id);
1460         if (!err)
1461                 atomic_dec(&qp->usecnt);
1462         return err;
1463 }
1464 EXPORT_SYMBOL(ib_destroy_flow);
1465
1466 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1467                        struct ib_mr_status *mr_status)
1468 {
1469         return mr->device->check_mr_status ?
1470                 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1471 }
1472 EXPORT_SYMBOL(ib_check_mr_status);