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