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