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