git.oblomov.eu Git - linux-2.6/blob - 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  * $Id: verbs.c 1349 2004-12-16 21:09:43Z roland $
  39  */
  40
  41 #include <linux/errno.h>
  42 #include <linux/err.h>
  43 #include <linux/string.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 /* Protection domains */
  83
  84 struct ib_pd *ib_alloc_pd(struct ib_device *device)
  85 {
  86         struct ib_pd *pd;
  87
  88         pd = device->alloc_pd(device, NULL, NULL);
  89
  90         if (!IS_ERR(pd)) {
  91                 pd->device  = device;
  92                 pd->uobject = NULL;
  93                 atomic_set(&pd->usecnt, 0);
  94         }
  95
  96         return pd;
  97 }
  98 EXPORT_SYMBOL(ib_alloc_pd);
  99
 100 int ib_dealloc_pd(struct ib_pd *pd)
 101 {
 102         if (atomic_read(&pd->usecnt))
 103                 return -EBUSY;
 104
 105         return pd->device->dealloc_pd(pd);
 106 }
 107 EXPORT_SYMBOL(ib_dealloc_pd);
 108
 109 /* Address handles */
 110
 111 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 112 {
 113         struct ib_ah *ah;
 114
 115         ah = pd->device->create_ah(pd, ah_attr);
 116
 117         if (!IS_ERR(ah)) {
 118                 ah->device  = pd->device;
 119                 ah->pd      = pd;
 120                 ah->uobject = NULL;
 121                 atomic_inc(&pd->usecnt);
 122         }
 123
 124         return ah;
 125 }
 126 EXPORT_SYMBOL(ib_create_ah);
 127
 128 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
 129                                    struct ib_grh *grh, u8 port_num)
 130 {
 131         struct ib_ah_attr ah_attr;
 132         u32 flow_class;
 133         u16 gid_index;
 134         int ret;
 135
 136         memset(&ah_attr, 0, sizeof ah_attr);
 137         ah_attr.dlid = wc->slid;
 138         ah_attr.sl = wc->sl;
 139         ah_attr.src_path_bits = wc->dlid_path_bits;
 140         ah_attr.port_num = port_num;
 141
 142         if (wc->wc_flags & IB_WC_GRH) {
 143                 ah_attr.ah_flags = IB_AH_GRH;
 144                 ah_attr.grh.dgid = grh->sgid;
 145
 146                 ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num,
 147                                          &gid_index);
 148                 if (ret)
 149                         return ERR_PTR(ret);
 150
 151                 ah_attr.grh.sgid_index = (u8) gid_index;
 152                 flow_class = be32_to_cpu(grh->version_tclass_flow);
 153                 ah_attr.grh.flow_label = flow_class & 0xFFFFF;
 154                 ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
 155                 ah_attr.grh.hop_limit = grh->hop_limit;
 156         }
 157
 158         return ib_create_ah(pd, &ah_attr);
 159 }
 160 EXPORT_SYMBOL(ib_create_ah_from_wc);
 161
 162 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 163 {
 164         return ah->device->modify_ah ?
 165                 ah->device->modify_ah(ah, ah_attr) :
 166                 -ENOSYS;
 167 }
 168 EXPORT_SYMBOL(ib_modify_ah);
 169
 170 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 171 {
 172         return ah->device->query_ah ?
 173                 ah->device->query_ah(ah, ah_attr) :
 174                 -ENOSYS;
 175 }
 176 EXPORT_SYMBOL(ib_query_ah);
 177
 178 int ib_destroy_ah(struct ib_ah *ah)
 179 {
 180         struct ib_pd *pd;
 181         int ret;
 182
 183         pd = ah->pd;
 184         ret = ah->device->destroy_ah(ah);
 185         if (!ret)
 186                 atomic_dec(&pd->usecnt);
 187
 188         return ret;
 189 }
 190 EXPORT_SYMBOL(ib_destroy_ah);
 191
 192 /* Shared receive queues */
 193
 194 struct ib_srq *ib_create_srq(struct ib_pd *pd,
 195                              struct ib_srq_init_attr *srq_init_attr)
 196 {
 197         struct ib_srq *srq;
 198
 199         if (!pd->device->create_srq)
 200                 return ERR_PTR(-ENOSYS);
 201
 202         srq = pd->device->create_srq(pd, srq_init_attr, NULL);
 203
 204         if (!IS_ERR(srq)) {
 205                 srq->device        = pd->device;
 206                 srq->pd            = pd;
 207                 srq->uobject       = NULL;
 208                 srq->event_handler = srq_init_attr->event_handler;
 209                 srq->srq_context   = srq_init_attr->srq_context;
 210                 atomic_inc(&pd->usecnt);
 211                 atomic_set(&srq->usecnt, 0);
 212         }
 213
 214         return srq;
 215 }
 216 EXPORT_SYMBOL(ib_create_srq);
 217
 218 int ib_modify_srq(struct ib_srq *srq,
 219                   struct ib_srq_attr *srq_attr,
 220                   enum ib_srq_attr_mask srq_attr_mask)
 221 {
 222         return srq->device->modify_srq(srq, srq_attr, srq_attr_mask);
 223 }
 224 EXPORT_SYMBOL(ib_modify_srq);
 225
 226 int ib_query_srq(struct ib_srq *srq,
 227                  struct ib_srq_attr *srq_attr)
 228 {
 229         return srq->device->query_srq ?
 230                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 231 }
 232 EXPORT_SYMBOL(ib_query_srq);
 233
 234 int ib_destroy_srq(struct ib_srq *srq)
 235 {
 236         struct ib_pd *pd;
 237         int ret;
 238
 239         if (atomic_read(&srq->usecnt))
 240                 return -EBUSY;
 241
 242         pd = srq->pd;
 243
 244         ret = srq->device->destroy_srq(srq);
 245         if (!ret)
 246                 atomic_dec(&pd->usecnt);
 247
 248         return ret;
 249 }
 250 EXPORT_SYMBOL(ib_destroy_srq);
 251
 252 /* Queue pairs */
 253
 254 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 255                            struct ib_qp_init_attr *qp_init_attr)
 256 {
 257         struct ib_qp *qp;
 258
 259         qp = pd->device->create_qp(pd, qp_init_attr, NULL);
 260
 261         if (!IS_ERR(qp)) {
 262                 qp->device        = pd->device;
 263                 qp->pd            = pd;
 264                 qp->send_cq       = qp_init_attr->send_cq;
 265                 qp->recv_cq       = qp_init_attr->recv_cq;
 266                 qp->srq           = qp_init_attr->srq;
 267                 qp->uobject       = NULL;
 268                 qp->event_handler = qp_init_attr->event_handler;
 269                 qp->qp_context    = qp_init_attr->qp_context;
 270                 qp->qp_type       = qp_init_attr->qp_type;
 271                 atomic_inc(&pd->usecnt);
 272                 atomic_inc(&qp_init_attr->send_cq->usecnt);
 273                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 274                 if (qp_init_attr->srq)
 275                         atomic_inc(&qp_init_attr->srq->usecnt);
 276         }
 277
 278         return qp;
 279 }
 280 EXPORT_SYMBOL(ib_create_qp);
 281
 282 static const struct {
 283         int                     valid;
 284         enum ib_qp_attr_mask    req_param[IB_QPT_RAW_ETY + 1];
 285         enum ib_qp_attr_mask    opt_param[IB_QPT_RAW_ETY + 1];
 286 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 287         [IB_QPS_RESET] = {
 288                 [IB_QPS_RESET] = { .valid = 1 },
 289                 [IB_QPS_ERR]   = { .valid = 1 },
 290                 [IB_QPS_INIT]  = {
 291                         .valid = 1,
 292                         .req_param = {
 293                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 294                                                 IB_QP_PORT                      |
 295                                                 IB_QP_QKEY),
 296                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 297                                                 IB_QP_PORT                      |
 298                                                 IB_QP_ACCESS_FLAGS),
 299                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 300                                                 IB_QP_PORT                      |
 301                                                 IB_QP_ACCESS_FLAGS),
 302                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 303                                                 IB_QP_QKEY),
 304                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 305                                                 IB_QP_QKEY),
 306                         }
 307                 },
 308         },
 309         [IB_QPS_INIT]  = {
 310                 [IB_QPS_RESET] = { .valid = 1 },
 311                 [IB_QPS_ERR] =   { .valid = 1 },
 312                 [IB_QPS_INIT]  = {
 313                         .valid = 1,
 314                         .opt_param = {
 315                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 316                                                 IB_QP_PORT                      |
 317                                                 IB_QP_QKEY),
 318                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 319                                                 IB_QP_PORT                      |
 320                                                 IB_QP_ACCESS_FLAGS),
 321                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 322                                                 IB_QP_PORT                      |
 323                                                 IB_QP_ACCESS_FLAGS),
 324                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 325                                                 IB_QP_QKEY),
 326                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 327                                                 IB_QP_QKEY),
 328                         }
 329                 },
 330                 [IB_QPS_RTR]   = {
 331                         .valid = 1,
 332                         .req_param = {
 333                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 334                                                 IB_QP_PATH_MTU                  |
 335                                                 IB_QP_DEST_QPN                  |
 336                                                 IB_QP_RQ_PSN),
 337                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 338                                                 IB_QP_PATH_MTU                  |
 339                                                 IB_QP_DEST_QPN                  |
 340                                                 IB_QP_RQ_PSN                    |
 341                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 342                                                 IB_QP_MIN_RNR_TIMER),
 343                         },
 344                         .opt_param = {
 345                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 346                                                  IB_QP_QKEY),
 347                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 348                                                  IB_QP_ACCESS_FLAGS             |
 349                                                  IB_QP_PKEY_INDEX),
 350                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 351                                                  IB_QP_ACCESS_FLAGS             |
 352                                                  IB_QP_PKEY_INDEX),
 353                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 354                                                  IB_QP_QKEY),
 355                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 356                                                  IB_QP_QKEY),
 357                          }
 358                 }
 359         },
 360         [IB_QPS_RTR]   = {
 361                 [IB_QPS_RESET] = { .valid = 1 },
 362                 [IB_QPS_ERR] =   { .valid = 1 },
 363                 [IB_QPS_RTS]   = {
 364                         .valid = 1,
 365                         .req_param = {
 366                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 367                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 368                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 369                                                 IB_QP_RETRY_CNT                 |
 370                                                 IB_QP_RNR_RETRY                 |
 371                                                 IB_QP_SQ_PSN                    |
 372                                                 IB_QP_MAX_QP_RD_ATOMIC),
 373                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 374                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 375                         },
 376                         .opt_param = {
 377                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 378                                                  IB_QP_QKEY),
 379                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 380                                                  IB_QP_ALT_PATH                 |
 381                                                  IB_QP_ACCESS_FLAGS             |
 382                                                  IB_QP_PATH_MIG_STATE),
 383                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 384                                                  IB_QP_ALT_PATH                 |
 385                                                  IB_QP_ACCESS_FLAGS             |
 386                                                  IB_QP_MIN_RNR_TIMER            |
 387                                                  IB_QP_PATH_MIG_STATE),
 388                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 389                                                  IB_QP_QKEY),
 390                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 391                                                  IB_QP_QKEY),
 392                          }
 393                 }
 394         },
 395         [IB_QPS_RTS]   = {
 396                 [IB_QPS_RESET] = { .valid = 1 },
 397                 [IB_QPS_ERR] =   { .valid = 1 },
 398                 [IB_QPS_RTS]   = {
 399                         .valid = 1,
 400                         .opt_param = {
 401                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 402                                                 IB_QP_QKEY),
 403                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 404                                                 IB_QP_ACCESS_FLAGS              |
 405                                                 IB_QP_ALT_PATH                  |
 406                                                 IB_QP_PATH_MIG_STATE),
 407                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 408                                                 IB_QP_ACCESS_FLAGS              |
 409                                                 IB_QP_ALT_PATH                  |
 410                                                 IB_QP_PATH_MIG_STATE            |
 411                                                 IB_QP_MIN_RNR_TIMER),
 412                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 413                                                 IB_QP_QKEY),
 414                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 415                                                 IB_QP_QKEY),
 416                         }
 417                 },
 418                 [IB_QPS_SQD]   = {
 419                         .valid = 1,
 420                         .opt_param = {
 421                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 422                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 423                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 424                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 425                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 426                         }
 427                 },
 428         },
 429         [IB_QPS_SQD]   = {
 430                 [IB_QPS_RESET] = { .valid = 1 },
 431                 [IB_QPS_ERR] =   { .valid = 1 },
 432                 [IB_QPS_RTS]   = {
 433                         .valid = 1,
 434                         .opt_param = {
 435                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 436                                                 IB_QP_QKEY),
 437                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 438                                                 IB_QP_ALT_PATH                  |
 439                                                 IB_QP_ACCESS_FLAGS              |
 440                                                 IB_QP_PATH_MIG_STATE),
 441                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 442                                                 IB_QP_ALT_PATH                  |
 443                                                 IB_QP_ACCESS_FLAGS              |
 444                                                 IB_QP_MIN_RNR_TIMER             |
 445                                                 IB_QP_PATH_MIG_STATE),
 446                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 447                                                 IB_QP_QKEY),
 448                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 449                                                 IB_QP_QKEY),
 450                         }
 451                 },
 452                 [IB_QPS_SQD]   = {
 453                         .valid = 1,
 454                         .opt_param = {
 455                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 456                                                 IB_QP_QKEY),
 457                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 458                                                 IB_QP_ALT_PATH                  |
 459                                                 IB_QP_ACCESS_FLAGS              |
 460                                                 IB_QP_PKEY_INDEX                |
 461                                                 IB_QP_PATH_MIG_STATE),
 462                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 463                                                 IB_QP_AV                        |
 464                                                 IB_QP_TIMEOUT                   |
 465                                                 IB_QP_RETRY_CNT                 |
 466                                                 IB_QP_RNR_RETRY                 |
 467                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 468                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 469                                                 IB_QP_ALT_PATH                  |
 470                                                 IB_QP_ACCESS_FLAGS              |
 471                                                 IB_QP_PKEY_INDEX                |
 472                                                 IB_QP_MIN_RNR_TIMER             |
 473                                                 IB_QP_PATH_MIG_STATE),
 474                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 475                                                 IB_QP_QKEY),
 476                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 477                                                 IB_QP_QKEY),
 478                         }
 479                 }
 480         },
 481         [IB_QPS_SQE]   = {
 482                 [IB_QPS_RESET] = { .valid = 1 },
 483                 [IB_QPS_ERR] =   { .valid = 1 },
 484                 [IB_QPS_RTS]   = {
 485                         .valid = 1,
 486                         .opt_param = {
 487                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 488                                                 IB_QP_QKEY),
 489                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 490                                                 IB_QP_ACCESS_FLAGS),
 491                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 492                                                 IB_QP_QKEY),
 493                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 494                                                 IB_QP_QKEY),
 495                         }
 496                 }
 497         },
 498         [IB_QPS_ERR] = {
 499                 [IB_QPS_RESET] = { .valid = 1 },
 500                 [IB_QPS_ERR] =   { .valid = 1 }
 501         }
 502 };
 503
 504 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 505                        enum ib_qp_type type, enum ib_qp_attr_mask mask)
 506 {
 507         enum ib_qp_attr_mask req_param, opt_param;
 508
 509         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 510             next_state < 0 || next_state > IB_QPS_ERR)
 511                 return 0;
 512
 513         if (mask & IB_QP_CUR_STATE  &&
 514             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 515             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 516                 return 0;
 517
 518         if (!qp_state_table[cur_state][next_state].valid)
 519                 return 0;
 520
 521         req_param = qp_state_table[cur_state][next_state].req_param[type];
 522         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 523
 524         if ((mask & req_param) != req_param)
 525                 return 0;
 526
 527         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 528                 return 0;
 529
 530         return 1;
 531 }
 532 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 533
 534 int ib_modify_qp(struct ib_qp *qp,
 535                  struct ib_qp_attr *qp_attr,
 536                  int qp_attr_mask)
 537 {
 538         return qp->device->modify_qp(qp, qp_attr, qp_attr_mask);
 539 }
 540 EXPORT_SYMBOL(ib_modify_qp);
 541
 542 int ib_query_qp(struct ib_qp *qp,
 543                 struct ib_qp_attr *qp_attr,
 544                 int qp_attr_mask,
 545                 struct ib_qp_init_attr *qp_init_attr)
 546 {
 547         return qp->device->query_qp ?
 548                 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
 549                 -ENOSYS;
 550 }
 551 EXPORT_SYMBOL(ib_query_qp);
 552
 553 int ib_destroy_qp(struct ib_qp *qp)
 554 {
 555         struct ib_pd *pd;
 556         struct ib_cq *scq, *rcq;
 557         struct ib_srq *srq;
 558         int ret;
 559
 560         pd  = qp->pd;
 561         scq = qp->send_cq;
 562         rcq = qp->recv_cq;
 563         srq = qp->srq;
 564
 565         ret = qp->device->destroy_qp(qp);
 566         if (!ret) {
 567                 atomic_dec(&pd->usecnt);
 568                 atomic_dec(&scq->usecnt);
 569                 atomic_dec(&rcq->usecnt);
 570                 if (srq)
 571                         atomic_dec(&srq->usecnt);
 572         }
 573
 574         return ret;
 575 }
 576 EXPORT_SYMBOL(ib_destroy_qp);
 577
 578 /* Completion queues */
 579
 580 struct ib_cq *ib_create_cq(struct ib_device *device,
 581                            ib_comp_handler comp_handler,
 582                            void (*event_handler)(struct ib_event *, void *),
 583                            void *cq_context, int cqe)
 584 {
 585         struct ib_cq *cq;
 586
 587         cq = device->create_cq(device, cqe, NULL, NULL);
 588
 589         if (!IS_ERR(cq)) {
 590                 cq->device        = device;
 591                 cq->uobject       = NULL;
 592                 cq->comp_handler  = comp_handler;
 593                 cq->event_handler = event_handler;
 594                 cq->cq_context    = cq_context;
 595                 atomic_set(&cq->usecnt, 0);
 596         }
 597
 598         return cq;
 599 }
 600 EXPORT_SYMBOL(ib_create_cq);
 601
 602 int ib_destroy_cq(struct ib_cq *cq)
 603 {
 604         if (atomic_read(&cq->usecnt))
 605                 return -EBUSY;
 606
 607         return cq->device->destroy_cq(cq);
 608 }
 609 EXPORT_SYMBOL(ib_destroy_cq);
 610
 611 int ib_resize_cq(struct ib_cq *cq, int cqe)
 612 {
 613         return cq->device->resize_cq ?
 614                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
 615 }
 616 EXPORT_SYMBOL(ib_resize_cq);
 617
 618 /* Memory regions */
 619
 620 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 621 {
 622         struct ib_mr *mr;
 623
 624         mr = pd->device->get_dma_mr(pd, mr_access_flags);
 625
 626         if (!IS_ERR(mr)) {
 627                 mr->device  = pd->device;
 628                 mr->pd      = pd;
 629                 mr->uobject = NULL;
 630                 atomic_inc(&pd->usecnt);
 631                 atomic_set(&mr->usecnt, 0);
 632         }
 633
 634         return mr;
 635 }
 636 EXPORT_SYMBOL(ib_get_dma_mr);
 637
 638 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
 639                              struct ib_phys_buf *phys_buf_array,
 640                              int num_phys_buf,
 641                              int mr_access_flags,
 642                              u64 *iova_start)
 643 {
 644         struct ib_mr *mr;
 645
 646         mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
 647                                      mr_access_flags, iova_start);
 648
 649         if (!IS_ERR(mr)) {
 650                 mr->device  = pd->device;
 651                 mr->pd      = pd;
 652                 mr->uobject = NULL;
 653                 atomic_inc(&pd->usecnt);
 654                 atomic_set(&mr->usecnt, 0);
 655         }
 656
 657         return mr;
 658 }
 659 EXPORT_SYMBOL(ib_reg_phys_mr);
 660
 661 int ib_rereg_phys_mr(struct ib_mr *mr,
 662                      int mr_rereg_mask,
 663                      struct ib_pd *pd,
 664                      struct ib_phys_buf *phys_buf_array,
 665                      int num_phys_buf,
 666                      int mr_access_flags,
 667                      u64 *iova_start)
 668 {
 669         struct ib_pd *old_pd;
 670         int ret;
 671
 672         if (!mr->device->rereg_phys_mr)
 673                 return -ENOSYS;
 674
 675         if (atomic_read(&mr->usecnt))
 676                 return -EBUSY;
 677
 678         old_pd = mr->pd;
 679
 680         ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
 681                                         phys_buf_array, num_phys_buf,
 682                                         mr_access_flags, iova_start);
 683
 684         if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
 685                 atomic_dec(&old_pd->usecnt);
 686                 atomic_inc(&pd->usecnt);
 687         }
 688
 689         return ret;
 690 }
 691 EXPORT_SYMBOL(ib_rereg_phys_mr);
 692
 693 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 694 {
 695         return mr->device->query_mr ?
 696                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
 697 }
 698 EXPORT_SYMBOL(ib_query_mr);
 699
 700 int ib_dereg_mr(struct ib_mr *mr)
 701 {
 702         struct ib_pd *pd;
 703         int ret;
 704
 705         if (atomic_read(&mr->usecnt))
 706                 return -EBUSY;
 707
 708         pd = mr->pd;
 709         ret = mr->device->dereg_mr(mr);
 710         if (!ret)
 711                 atomic_dec(&pd->usecnt);
 712
 713         return ret;
 714 }
 715 EXPORT_SYMBOL(ib_dereg_mr);
 716
 717 /* Memory windows */
 718
 719 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
 720 {
 721         struct ib_mw *mw;
 722
 723         if (!pd->device->alloc_mw)
 724                 return ERR_PTR(-ENOSYS);
 725
 726         mw = pd->device->alloc_mw(pd);
 727         if (!IS_ERR(mw)) {
 728                 mw->device  = pd->device;
 729                 mw->pd      = pd;
 730                 mw->uobject = NULL;
 731                 atomic_inc(&pd->usecnt);
 732         }
 733
 734         return mw;
 735 }
 736 EXPORT_SYMBOL(ib_alloc_mw);
 737
 738 int ib_dealloc_mw(struct ib_mw *mw)
 739 {
 740         struct ib_pd *pd;
 741         int ret;
 742
 743         pd = mw->pd;
 744         ret = mw->device->dealloc_mw(mw);
 745         if (!ret)
 746                 atomic_dec(&pd->usecnt);
 747
 748         return ret;
 749 }
 750 EXPORT_SYMBOL(ib_dealloc_mw);
 751
 752 /* "Fast" memory regions */
 753
 754 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
 755                             int mr_access_flags,
 756                             struct ib_fmr_attr *fmr_attr)
 757 {
 758         struct ib_fmr *fmr;
 759
 760         if (!pd->device->alloc_fmr)
 761                 return ERR_PTR(-ENOSYS);
 762
 763         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
 764         if (!IS_ERR(fmr)) {
 765                 fmr->device = pd->device;
 766                 fmr->pd     = pd;
 767                 atomic_inc(&pd->usecnt);
 768         }
 769
 770         return fmr;
 771 }
 772 EXPORT_SYMBOL(ib_alloc_fmr);
 773
 774 int ib_unmap_fmr(struct list_head *fmr_list)
 775 {
 776         struct ib_fmr *fmr;
 777
 778         if (list_empty(fmr_list))
 779                 return 0;
 780
 781         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
 782         return fmr->device->unmap_fmr(fmr_list);
 783 }
 784 EXPORT_SYMBOL(ib_unmap_fmr);
 785
 786 int ib_dealloc_fmr(struct ib_fmr *fmr)
 787 {
 788         struct ib_pd *pd;
 789         int ret;
 790
 791         pd = fmr->pd;
 792         ret = fmr->device->dealloc_fmr(fmr);
 793         if (!ret)
 794                 atomic_dec(&pd->usecnt);
 795
 796         return ret;
 797 }
 798 EXPORT_SYMBOL(ib_dealloc_fmr);
 799
 800 /* Multicast groups */
 801
 802 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 803 {
 804         if (!qp->device->attach_mcast)
 805                 return -ENOSYS;
 806         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 807                 return -EINVAL;
 808
 809         return qp->device->attach_mcast(qp, gid, lid);
 810 }
 811 EXPORT_SYMBOL(ib_attach_mcast);
 812
 813 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 814 {
 815         if (!qp->device->detach_mcast)
 816                 return -ENOSYS;
 817         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 818                 return -EINVAL;
 819
 820         return qp->device->detach_mcast(qp, gid, lid);
 821 }
 822 EXPORT_SYMBOL(ib_detach_mcast);