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/string.h>
  42
  43 #include <rdma/ib_verbs.h>
  44 #include <rdma/ib_cache.h>
  45
  46 int ib_rate_to_mult(enum ib_rate rate)
  47 {
  48         switch (rate) {
  49         case IB_RATE_2_5_GBPS: return  1;
  50         case IB_RATE_5_GBPS:   return  2;
  51         case IB_RATE_10_GBPS:  return  4;
  52         case IB_RATE_20_GBPS:  return  8;
  53         case IB_RATE_30_GBPS:  return 12;
  54         case IB_RATE_40_GBPS:  return 16;
  55         case IB_RATE_60_GBPS:  return 24;
  56         case IB_RATE_80_GBPS:  return 32;
  57         case IB_RATE_120_GBPS: return 48;
  58         default:               return -1;
  59         }
  60 }
  61 EXPORT_SYMBOL(ib_rate_to_mult);
  62
  63 enum ib_rate mult_to_ib_rate(int mult)
  64 {
  65         switch (mult) {
  66         case 1:  return IB_RATE_2_5_GBPS;
  67         case 2:  return IB_RATE_5_GBPS;
  68         case 4:  return IB_RATE_10_GBPS;
  69         case 8:  return IB_RATE_20_GBPS;
  70         case 12: return IB_RATE_30_GBPS;
  71         case 16: return IB_RATE_40_GBPS;
  72         case 24: return IB_RATE_60_GBPS;
  73         case 32: return IB_RATE_80_GBPS;
  74         case 48: return IB_RATE_120_GBPS;
  75         default: return IB_RATE_PORT_CURRENT;
  76         }
  77 }
  78 EXPORT_SYMBOL(mult_to_ib_rate);
  79
  80 enum rdma_transport_type
  81 rdma_node_get_transport(enum rdma_node_type node_type)
  82 {
  83         switch (node_type) {
  84         case RDMA_NODE_IB_CA:
  85         case RDMA_NODE_IB_SWITCH:
  86         case RDMA_NODE_IB_ROUTER:
  87                 return RDMA_TRANSPORT_IB;
  88         case RDMA_NODE_RNIC:
  89                 return RDMA_TRANSPORT_IWARP;
  90         default:
  91                 BUG();
  92                 return 0;
  93         }
  94 }
  95 EXPORT_SYMBOL(rdma_node_get_transport);
  96
  97 /* Protection domains */
  98
  99 struct ib_pd *ib_alloc_pd(struct ib_device *device)
 100 {
 101         struct ib_pd *pd;
 102
 103         pd = device->alloc_pd(device, NULL, NULL);
 104
 105         if (!IS_ERR(pd)) {
 106                 pd->device  = device;
 107                 pd->uobject = NULL;
 108                 atomic_set(&pd->usecnt, 0);
 109         }
 110
 111         return pd;
 112 }
 113 EXPORT_SYMBOL(ib_alloc_pd);
 114
 115 int ib_dealloc_pd(struct ib_pd *pd)
 116 {
 117         if (atomic_read(&pd->usecnt))
 118                 return -EBUSY;
 119
 120         return pd->device->dealloc_pd(pd);
 121 }
 122 EXPORT_SYMBOL(ib_dealloc_pd);
 123
 124 /* Address handles */
 125
 126 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 127 {
 128         struct ib_ah *ah;
 129
 130         ah = pd->device->create_ah(pd, ah_attr);
 131
 132         if (!IS_ERR(ah)) {
 133                 ah->device  = pd->device;
 134                 ah->pd      = pd;
 135                 ah->uobject = NULL;
 136                 atomic_inc(&pd->usecnt);
 137         }
 138
 139         return ah;
 140 }
 141 EXPORT_SYMBOL(ib_create_ah);
 142
 143 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
 144                        struct ib_grh *grh, struct ib_ah_attr *ah_attr)
 145 {
 146         u32 flow_class;
 147         u16 gid_index;
 148         int ret;
 149
 150         memset(ah_attr, 0, sizeof *ah_attr);
 151         ah_attr->dlid = wc->slid;
 152         ah_attr->sl = wc->sl;
 153         ah_attr->src_path_bits = wc->dlid_path_bits;
 154         ah_attr->port_num = port_num;
 155
 156         if (wc->wc_flags & IB_WC_GRH) {
 157                 ah_attr->ah_flags = IB_AH_GRH;
 158                 ah_attr->grh.dgid = grh->sgid;
 159
 160                 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
 161                                          &gid_index);
 162                 if (ret)
 163                         return ret;
 164
 165                 ah_attr->grh.sgid_index = (u8) gid_index;
 166                 flow_class = be32_to_cpu(grh->version_tclass_flow);
 167                 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
 168                 ah_attr->grh.hop_limit = 0xFF;
 169                 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
 170         }
 171         return 0;
 172 }
 173 EXPORT_SYMBOL(ib_init_ah_from_wc);
 174
 175 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
 176                                    struct ib_grh *grh, u8 port_num)
 177 {
 178         struct ib_ah_attr ah_attr;
 179         int ret;
 180
 181         ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
 182         if (ret)
 183                 return ERR_PTR(ret);
 184
 185         return ib_create_ah(pd, &ah_attr);
 186 }
 187 EXPORT_SYMBOL(ib_create_ah_from_wc);
 188
 189 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 190 {
 191         return ah->device->modify_ah ?
 192                 ah->device->modify_ah(ah, ah_attr) :
 193                 -ENOSYS;
 194 }
 195 EXPORT_SYMBOL(ib_modify_ah);
 196
 197 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 198 {
 199         return ah->device->query_ah ?
 200                 ah->device->query_ah(ah, ah_attr) :
 201                 -ENOSYS;
 202 }
 203 EXPORT_SYMBOL(ib_query_ah);
 204
 205 int ib_destroy_ah(struct ib_ah *ah)
 206 {
 207         struct ib_pd *pd;
 208         int ret;
 209
 210         pd = ah->pd;
 211         ret = ah->device->destroy_ah(ah);
 212         if (!ret)
 213                 atomic_dec(&pd->usecnt);
 214
 215         return ret;
 216 }
 217 EXPORT_SYMBOL(ib_destroy_ah);
 218
 219 /* Shared receive queues */
 220
 221 struct ib_srq *ib_create_srq(struct ib_pd *pd,
 222                              struct ib_srq_init_attr *srq_init_attr)
 223 {
 224         struct ib_srq *srq;
 225
 226         if (!pd->device->create_srq)
 227                 return ERR_PTR(-ENOSYS);
 228
 229         srq = pd->device->create_srq(pd, srq_init_attr, NULL);
 230
 231         if (!IS_ERR(srq)) {
 232                 srq->device        = pd->device;
 233                 srq->pd            = pd;
 234                 srq->uobject       = NULL;
 235                 srq->event_handler = srq_init_attr->event_handler;
 236                 srq->srq_context   = srq_init_attr->srq_context;
 237                 atomic_inc(&pd->usecnt);
 238                 atomic_set(&srq->usecnt, 0);
 239         }
 240
 241         return srq;
 242 }
 243 EXPORT_SYMBOL(ib_create_srq);
 244
 245 int ib_modify_srq(struct ib_srq *srq,
 246                   struct ib_srq_attr *srq_attr,
 247                   enum ib_srq_attr_mask srq_attr_mask)
 248 {
 249         return srq->device->modify_srq ?
 250                 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
 251                 -ENOSYS;
 252 }
 253 EXPORT_SYMBOL(ib_modify_srq);
 254
 255 int ib_query_srq(struct ib_srq *srq,
 256                  struct ib_srq_attr *srq_attr)
 257 {
 258         return srq->device->query_srq ?
 259                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 260 }
 261 EXPORT_SYMBOL(ib_query_srq);
 262
 263 int ib_destroy_srq(struct ib_srq *srq)
 264 {
 265         struct ib_pd *pd;
 266         int ret;
 267
 268         if (atomic_read(&srq->usecnt))
 269                 return -EBUSY;
 270
 271         pd = srq->pd;
 272
 273         ret = srq->device->destroy_srq(srq);
 274         if (!ret)
 275                 atomic_dec(&pd->usecnt);
 276
 277         return ret;
 278 }
 279 EXPORT_SYMBOL(ib_destroy_srq);
 280
 281 /* Queue pairs */
 282
 283 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 284                            struct ib_qp_init_attr *qp_init_attr)
 285 {
 286         struct ib_qp *qp;
 287
 288         qp = pd->device->create_qp(pd, qp_init_attr, NULL);
 289
 290         if (!IS_ERR(qp)) {
 291                 qp->device        = pd->device;
 292                 qp->pd            = pd;
 293                 qp->send_cq       = qp_init_attr->send_cq;
 294                 qp->recv_cq       = qp_init_attr->recv_cq;
 295                 qp->srq           = qp_init_attr->srq;
 296                 qp->uobject       = NULL;
 297                 qp->event_handler = qp_init_attr->event_handler;
 298                 qp->qp_context    = qp_init_attr->qp_context;
 299                 qp->qp_type       = qp_init_attr->qp_type;
 300                 atomic_inc(&pd->usecnt);
 301                 atomic_inc(&qp_init_attr->send_cq->usecnt);
 302                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 303                 if (qp_init_attr->srq)
 304                         atomic_inc(&qp_init_attr->srq->usecnt);
 305         }
 306
 307         return qp;
 308 }
 309 EXPORT_SYMBOL(ib_create_qp);
 310
 311 static const struct {
 312         int                     valid;
 313         enum ib_qp_attr_mask    req_param[IB_QPT_RAW_ETY + 1];
 314         enum ib_qp_attr_mask    opt_param[IB_QPT_RAW_ETY + 1];
 315 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 316         [IB_QPS_RESET] = {
 317                 [IB_QPS_RESET] = { .valid = 1 },
 318                 [IB_QPS_INIT]  = {
 319                         .valid = 1,
 320                         .req_param = {
 321                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 322                                                 IB_QP_PORT                      |
 323                                                 IB_QP_QKEY),
 324                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 325                                                 IB_QP_PORT                      |
 326                                                 IB_QP_ACCESS_FLAGS),
 327                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 328                                                 IB_QP_PORT                      |
 329                                                 IB_QP_ACCESS_FLAGS),
 330                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 331                                                 IB_QP_QKEY),
 332                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 333                                                 IB_QP_QKEY),
 334                         }
 335                 },
 336         },
 337         [IB_QPS_INIT]  = {
 338                 [IB_QPS_RESET] = { .valid = 1 },
 339                 [IB_QPS_ERR] =   { .valid = 1 },
 340                 [IB_QPS_INIT]  = {
 341                         .valid = 1,
 342                         .opt_param = {
 343                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 344                                                 IB_QP_PORT                      |
 345                                                 IB_QP_QKEY),
 346                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 347                                                 IB_QP_PORT                      |
 348                                                 IB_QP_ACCESS_FLAGS),
 349                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 350                                                 IB_QP_PORT                      |
 351                                                 IB_QP_ACCESS_FLAGS),
 352                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 353                                                 IB_QP_QKEY),
 354                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 355                                                 IB_QP_QKEY),
 356                         }
 357                 },
 358                 [IB_QPS_RTR]   = {
 359                         .valid = 1,
 360                         .req_param = {
 361                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 362                                                 IB_QP_PATH_MTU                  |
 363                                                 IB_QP_DEST_QPN                  |
 364                                                 IB_QP_RQ_PSN),
 365                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 366                                                 IB_QP_PATH_MTU                  |
 367                                                 IB_QP_DEST_QPN                  |
 368                                                 IB_QP_RQ_PSN                    |
 369                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 370                                                 IB_QP_MIN_RNR_TIMER),
 371                         },
 372                         .opt_param = {
 373                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 374                                                  IB_QP_QKEY),
 375                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 376                                                  IB_QP_ACCESS_FLAGS             |
 377                                                  IB_QP_PKEY_INDEX),
 378                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 379                                                  IB_QP_ACCESS_FLAGS             |
 380                                                  IB_QP_PKEY_INDEX),
 381                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 382                                                  IB_QP_QKEY),
 383                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 384                                                  IB_QP_QKEY),
 385                          }
 386                 }
 387         },
 388         [IB_QPS_RTR]   = {
 389                 [IB_QPS_RESET] = { .valid = 1 },
 390                 [IB_QPS_ERR] =   { .valid = 1 },
 391                 [IB_QPS_RTS]   = {
 392                         .valid = 1,
 393                         .req_param = {
 394                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 395                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 396                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 397                                                 IB_QP_RETRY_CNT                 |
 398                                                 IB_QP_RNR_RETRY                 |
 399                                                 IB_QP_SQ_PSN                    |
 400                                                 IB_QP_MAX_QP_RD_ATOMIC),
 401                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 402                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 403                         },
 404                         .opt_param = {
 405                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 406                                                  IB_QP_QKEY),
 407                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 408                                                  IB_QP_ALT_PATH                 |
 409                                                  IB_QP_ACCESS_FLAGS             |
 410                                                  IB_QP_PATH_MIG_STATE),
 411                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 412                                                  IB_QP_ALT_PATH                 |
 413                                                  IB_QP_ACCESS_FLAGS             |
 414                                                  IB_QP_MIN_RNR_TIMER            |
 415                                                  IB_QP_PATH_MIG_STATE),
 416                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 417                                                  IB_QP_QKEY),
 418                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 419                                                  IB_QP_QKEY),
 420                          }
 421                 }
 422         },
 423         [IB_QPS_RTS]   = {
 424                 [IB_QPS_RESET] = { .valid = 1 },
 425                 [IB_QPS_ERR] =   { .valid = 1 },
 426                 [IB_QPS_RTS]   = {
 427                         .valid = 1,
 428                         .opt_param = {
 429                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 430                                                 IB_QP_QKEY),
 431                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 432                                                 IB_QP_ACCESS_FLAGS              |
 433                                                 IB_QP_ALT_PATH                  |
 434                                                 IB_QP_PATH_MIG_STATE),
 435                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 436                                                 IB_QP_ACCESS_FLAGS              |
 437                                                 IB_QP_ALT_PATH                  |
 438                                                 IB_QP_PATH_MIG_STATE            |
 439                                                 IB_QP_MIN_RNR_TIMER),
 440                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 441                                                 IB_QP_QKEY),
 442                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 443                                                 IB_QP_QKEY),
 444                         }
 445                 },
 446                 [IB_QPS_SQD]   = {
 447                         .valid = 1,
 448                         .opt_param = {
 449                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 450                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 451                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 452                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 453                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 454                         }
 455                 },
 456         },
 457         [IB_QPS_SQD]   = {
 458                 [IB_QPS_RESET] = { .valid = 1 },
 459                 [IB_QPS_ERR] =   { .valid = 1 },
 460                 [IB_QPS_RTS]   = {
 461                         .valid = 1,
 462                         .opt_param = {
 463                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 464                                                 IB_QP_QKEY),
 465                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 466                                                 IB_QP_ALT_PATH                  |
 467                                                 IB_QP_ACCESS_FLAGS              |
 468                                                 IB_QP_PATH_MIG_STATE),
 469                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 470                                                 IB_QP_ALT_PATH                  |
 471                                                 IB_QP_ACCESS_FLAGS              |
 472                                                 IB_QP_MIN_RNR_TIMER             |
 473                                                 IB_QP_PATH_MIG_STATE),
 474                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 475                                                 IB_QP_QKEY),
 476                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 477                                                 IB_QP_QKEY),
 478                         }
 479                 },
 480                 [IB_QPS_SQD]   = {
 481                         .valid = 1,
 482                         .opt_param = {
 483                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 484                                                 IB_QP_QKEY),
 485                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 486                                                 IB_QP_ALT_PATH                  |
 487                                                 IB_QP_ACCESS_FLAGS              |
 488                                                 IB_QP_PKEY_INDEX                |
 489                                                 IB_QP_PATH_MIG_STATE),
 490                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 491                                                 IB_QP_AV                        |
 492                                                 IB_QP_TIMEOUT                   |
 493                                                 IB_QP_RETRY_CNT                 |
 494                                                 IB_QP_RNR_RETRY                 |
 495                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 496                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 497                                                 IB_QP_ALT_PATH                  |
 498                                                 IB_QP_ACCESS_FLAGS              |
 499                                                 IB_QP_PKEY_INDEX                |
 500                                                 IB_QP_MIN_RNR_TIMER             |
 501                                                 IB_QP_PATH_MIG_STATE),
 502                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 503                                                 IB_QP_QKEY),
 504                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 505                                                 IB_QP_QKEY),
 506                         }
 507                 }
 508         },
 509         [IB_QPS_SQE]   = {
 510                 [IB_QPS_RESET] = { .valid = 1 },
 511                 [IB_QPS_ERR] =   { .valid = 1 },
 512                 [IB_QPS_RTS]   = {
 513                         .valid = 1,
 514                         .opt_param = {
 515                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 516                                                 IB_QP_QKEY),
 517                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 518                                                 IB_QP_ACCESS_FLAGS),
 519                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 520                                                 IB_QP_QKEY),
 521                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 522                                                 IB_QP_QKEY),
 523                         }
 524                 }
 525         },
 526         [IB_QPS_ERR] = {
 527                 [IB_QPS_RESET] = { .valid = 1 },
 528                 [IB_QPS_ERR] =   { .valid = 1 }
 529         }
 530 };
 531
 532 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 533                        enum ib_qp_type type, enum ib_qp_attr_mask mask)
 534 {
 535         enum ib_qp_attr_mask req_param, opt_param;
 536
 537         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 538             next_state < 0 || next_state > IB_QPS_ERR)
 539                 return 0;
 540
 541         if (mask & IB_QP_CUR_STATE  &&
 542             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 543             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 544                 return 0;
 545
 546         if (!qp_state_table[cur_state][next_state].valid)
 547                 return 0;
 548
 549         req_param = qp_state_table[cur_state][next_state].req_param[type];
 550         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 551
 552         if ((mask & req_param) != req_param)
 553                 return 0;
 554
 555         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 556                 return 0;
 557
 558         return 1;
 559 }
 560 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 561
 562 int ib_modify_qp(struct ib_qp *qp,
 563                  struct ib_qp_attr *qp_attr,
 564                  int qp_attr_mask)
 565 {
 566         return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
 567 }
 568 EXPORT_SYMBOL(ib_modify_qp);
 569
 570 int ib_query_qp(struct ib_qp *qp,
 571                 struct ib_qp_attr *qp_attr,
 572                 int qp_attr_mask,
 573                 struct ib_qp_init_attr *qp_init_attr)
 574 {
 575         return qp->device->query_qp ?
 576                 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
 577                 -ENOSYS;
 578 }
 579 EXPORT_SYMBOL(ib_query_qp);
 580
 581 int ib_destroy_qp(struct ib_qp *qp)
 582 {
 583         struct ib_pd *pd;
 584         struct ib_cq *scq, *rcq;
 585         struct ib_srq *srq;
 586         int ret;
 587
 588         pd  = qp->pd;
 589         scq = qp->send_cq;
 590         rcq = qp->recv_cq;
 591         srq = qp->srq;
 592
 593         ret = qp->device->destroy_qp(qp);
 594         if (!ret) {
 595                 atomic_dec(&pd->usecnt);
 596                 atomic_dec(&scq->usecnt);
 597                 atomic_dec(&rcq->usecnt);
 598                 if (srq)
 599                         atomic_dec(&srq->usecnt);
 600         }
 601
 602         return ret;
 603 }
 604 EXPORT_SYMBOL(ib_destroy_qp);
 605
 606 /* Completion queues */
 607
 608 struct ib_cq *ib_create_cq(struct ib_device *device,
 609                            ib_comp_handler comp_handler,
 610                            void (*event_handler)(struct ib_event *, void *),
 611                            void *cq_context, int cqe, int comp_vector)
 612 {
 613         struct ib_cq *cq;
 614
 615         cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
 616
 617         if (!IS_ERR(cq)) {
 618                 cq->device        = device;
 619                 cq->uobject       = NULL;
 620                 cq->comp_handler  = comp_handler;
 621                 cq->event_handler = event_handler;
 622                 cq->cq_context    = cq_context;
 623                 atomic_set(&cq->usecnt, 0);
 624         }
 625
 626         return cq;
 627 }
 628 EXPORT_SYMBOL(ib_create_cq);
 629
 630 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
 631 {
 632         return cq->device->modify_cq ?
 633                 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
 634 }
 635 EXPORT_SYMBOL(ib_modify_cq);
 636
 637 int ib_destroy_cq(struct ib_cq *cq)
 638 {
 639         if (atomic_read(&cq->usecnt))
 640                 return -EBUSY;
 641
 642         return cq->device->destroy_cq(cq);
 643 }
 644 EXPORT_SYMBOL(ib_destroy_cq);
 645
 646 int ib_resize_cq(struct ib_cq *cq, int cqe)
 647 {
 648         return cq->device->resize_cq ?
 649                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
 650 }
 651 EXPORT_SYMBOL(ib_resize_cq);
 652
 653 /* Memory regions */
 654
 655 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 656 {
 657         struct ib_mr *mr;
 658
 659         mr = pd->device->get_dma_mr(pd, mr_access_flags);
 660
 661         if (!IS_ERR(mr)) {
 662                 mr->device  = pd->device;
 663                 mr->pd      = pd;
 664                 mr->uobject = NULL;
 665                 atomic_inc(&pd->usecnt);
 666                 atomic_set(&mr->usecnt, 0);
 667         }
 668
 669         return mr;
 670 }
 671 EXPORT_SYMBOL(ib_get_dma_mr);
 672
 673 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
 674                              struct ib_phys_buf *phys_buf_array,
 675                              int num_phys_buf,
 676                              int mr_access_flags,
 677                              u64 *iova_start)
 678 {
 679         struct ib_mr *mr;
 680
 681         if (!pd->device->reg_phys_mr)
 682                 return ERR_PTR(-ENOSYS);
 683
 684         mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
 685                                      mr_access_flags, iova_start);
 686
 687         if (!IS_ERR(mr)) {
 688                 mr->device  = pd->device;
 689                 mr->pd      = pd;
 690                 mr->uobject = NULL;
 691                 atomic_inc(&pd->usecnt);
 692                 atomic_set(&mr->usecnt, 0);
 693         }
 694
 695         return mr;
 696 }
 697 EXPORT_SYMBOL(ib_reg_phys_mr);
 698
 699 int ib_rereg_phys_mr(struct ib_mr *mr,
 700                      int mr_rereg_mask,
 701                      struct ib_pd *pd,
 702                      struct ib_phys_buf *phys_buf_array,
 703                      int num_phys_buf,
 704                      int mr_access_flags,
 705                      u64 *iova_start)
 706 {
 707         struct ib_pd *old_pd;
 708         int ret;
 709
 710         if (!mr->device->rereg_phys_mr)
 711                 return -ENOSYS;
 712
 713         if (atomic_read(&mr->usecnt))
 714                 return -EBUSY;
 715
 716         old_pd = mr->pd;
 717
 718         ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
 719                                         phys_buf_array, num_phys_buf,
 720                                         mr_access_flags, iova_start);
 721
 722         if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
 723                 atomic_dec(&old_pd->usecnt);
 724                 atomic_inc(&pd->usecnt);
 725         }
 726
 727         return ret;
 728 }
 729 EXPORT_SYMBOL(ib_rereg_phys_mr);
 730
 731 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 732 {
 733         return mr->device->query_mr ?
 734                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
 735 }
 736 EXPORT_SYMBOL(ib_query_mr);
 737
 738 int ib_dereg_mr(struct ib_mr *mr)
 739 {
 740         struct ib_pd *pd;
 741         int ret;
 742
 743         if (atomic_read(&mr->usecnt))
 744                 return -EBUSY;
 745
 746         pd = mr->pd;
 747         ret = mr->device->dereg_mr(mr);
 748         if (!ret)
 749                 atomic_dec(&pd->usecnt);
 750
 751         return ret;
 752 }
 753 EXPORT_SYMBOL(ib_dereg_mr);
 754
 755 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
 756 {
 757         struct ib_mr *mr;
 758
 759         if (!pd->device->alloc_fast_reg_mr)
 760                 return ERR_PTR(-ENOSYS);
 761
 762         mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
 763
 764         if (!IS_ERR(mr)) {
 765                 mr->device  = pd->device;
 766                 mr->pd      = pd;
 767                 mr->uobject = NULL;
 768                 atomic_inc(&pd->usecnt);
 769                 atomic_set(&mr->usecnt, 0);
 770         }
 771
 772         return mr;
 773 }
 774 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
 775
 776 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
 777                                                           int max_page_list_len)
 778 {
 779         struct ib_fast_reg_page_list *page_list;
 780
 781         if (!device->alloc_fast_reg_page_list)
 782                 return ERR_PTR(-ENOSYS);
 783
 784         page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
 785
 786         if (!IS_ERR(page_list)) {
 787                 page_list->device = device;
 788                 page_list->max_page_list_len = max_page_list_len;
 789         }
 790
 791         return page_list;
 792 }
 793 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
 794
 795 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
 796 {
 797         page_list->device->free_fast_reg_page_list(page_list);
 798 }
 799 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
 800
 801 /* Memory windows */
 802
 803 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
 804 {
 805         struct ib_mw *mw;
 806
 807         if (!pd->device->alloc_mw)
 808                 return ERR_PTR(-ENOSYS);
 809
 810         mw = pd->device->alloc_mw(pd);
 811         if (!IS_ERR(mw)) {
 812                 mw->device  = pd->device;
 813                 mw->pd      = pd;
 814                 mw->uobject = NULL;
 815                 atomic_inc(&pd->usecnt);
 816         }
 817
 818         return mw;
 819 }
 820 EXPORT_SYMBOL(ib_alloc_mw);
 821
 822 int ib_dealloc_mw(struct ib_mw *mw)
 823 {
 824         struct ib_pd *pd;
 825         int ret;
 826
 827         pd = mw->pd;
 828         ret = mw->device->dealloc_mw(mw);
 829         if (!ret)
 830                 atomic_dec(&pd->usecnt);
 831
 832         return ret;
 833 }
 834 EXPORT_SYMBOL(ib_dealloc_mw);
 835
 836 /* "Fast" memory regions */
 837
 838 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
 839                             int mr_access_flags,
 840                             struct ib_fmr_attr *fmr_attr)
 841 {
 842         struct ib_fmr *fmr;
 843
 844         if (!pd->device->alloc_fmr)
 845                 return ERR_PTR(-ENOSYS);
 846
 847         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
 848         if (!IS_ERR(fmr)) {
 849                 fmr->device = pd->device;
 850                 fmr->pd     = pd;
 851                 atomic_inc(&pd->usecnt);
 852         }
 853
 854         return fmr;
 855 }
 856 EXPORT_SYMBOL(ib_alloc_fmr);
 857
 858 int ib_unmap_fmr(struct list_head *fmr_list)
 859 {
 860         struct ib_fmr *fmr;
 861
 862         if (list_empty(fmr_list))
 863                 return 0;
 864
 865         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
 866         return fmr->device->unmap_fmr(fmr_list);
 867 }
 868 EXPORT_SYMBOL(ib_unmap_fmr);
 869
 870 int ib_dealloc_fmr(struct ib_fmr *fmr)
 871 {
 872         struct ib_pd *pd;
 873         int ret;
 874
 875         pd = fmr->pd;
 876         ret = fmr->device->dealloc_fmr(fmr);
 877         if (!ret)
 878                 atomic_dec(&pd->usecnt);
 879
 880         return ret;
 881 }
 882 EXPORT_SYMBOL(ib_dealloc_fmr);
 883
 884 /* Multicast groups */
 885
 886 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 887 {
 888         if (!qp->device->attach_mcast)
 889                 return -ENOSYS;
 890         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 891                 return -EINVAL;
 892
 893         return qp->device->attach_mcast(qp, gid, lid);
 894 }
 895 EXPORT_SYMBOL(ib_attach_mcast);
 896
 897 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 898 {
 899         if (!qp->device->detach_mcast)
 900                 return -ENOSYS;
 901         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 902                 return -EINVAL;
 903
 904         return qp->device->detach_mcast(qp, gid, lid);
 905 }
 906 EXPORT_SYMBOL(ib_detach_mcast);