SAFE public projects git trees. - safe/jmp/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 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 ?
 252                 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
 253                 -ENOSYS;
 254 }
 255 EXPORT_SYMBOL(ib_modify_srq);
 256
 257 int ib_query_srq(struct ib_srq *srq,
 258                  struct ib_srq_attr *srq_attr)
 259 {
 260         return srq->device->query_srq ?
 261                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 262 }
 263 EXPORT_SYMBOL(ib_query_srq);
 264
 265 int ib_destroy_srq(struct ib_srq *srq)
 266 {
 267         struct ib_pd *pd;
 268         int ret;
 269
 270         if (atomic_read(&srq->usecnt))
 271                 return -EBUSY;
 272
 273         pd = srq->pd;
 274
 275         ret = srq->device->destroy_srq(srq);
 276         if (!ret)
 277                 atomic_dec(&pd->usecnt);
 278
 279         return ret;
 280 }
 281 EXPORT_SYMBOL(ib_destroy_srq);
 282
 283 /* Queue pairs */
 284
 285 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 286                            struct ib_qp_init_attr *qp_init_attr)
 287 {
 288         struct ib_qp *qp;
 289
 290         qp = pd->device->create_qp(pd, qp_init_attr, NULL);
 291
 292         if (!IS_ERR(qp)) {
 293                 qp->device        = pd->device;
 294                 qp->pd            = pd;
 295                 qp->send_cq       = qp_init_attr->send_cq;
 296                 qp->recv_cq       = qp_init_attr->recv_cq;
 297                 qp->srq           = qp_init_attr->srq;
 298                 qp->uobject       = NULL;
 299                 qp->event_handler = qp_init_attr->event_handler;
 300                 qp->qp_context    = qp_init_attr->qp_context;
 301                 qp->qp_type       = qp_init_attr->qp_type;
 302                 atomic_inc(&pd->usecnt);
 303                 atomic_inc(&qp_init_attr->send_cq->usecnt);
 304                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 305                 if (qp_init_attr->srq)
 306                         atomic_inc(&qp_init_attr->srq->usecnt);
 307         }
 308
 309         return qp;
 310 }
 311 EXPORT_SYMBOL(ib_create_qp);
 312
 313 static const struct {
 314         int                     valid;
 315         enum ib_qp_attr_mask    req_param[IB_QPT_RAW_ETY + 1];
 316         enum ib_qp_attr_mask    opt_param[IB_QPT_RAW_ETY + 1];
 317 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 318         [IB_QPS_RESET] = {
 319                 [IB_QPS_RESET] = { .valid = 1 },
 320                 [IB_QPS_ERR]   = { .valid = 1 },
 321                 [IB_QPS_INIT]  = {
 322                         .valid = 1,
 323                         .req_param = {
 324                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 325                                                 IB_QP_PORT                      |
 326                                                 IB_QP_QKEY),
 327                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 328                                                 IB_QP_PORT                      |
 329                                                 IB_QP_ACCESS_FLAGS),
 330                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 331                                                 IB_QP_PORT                      |
 332                                                 IB_QP_ACCESS_FLAGS),
 333                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 334                                                 IB_QP_QKEY),
 335                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 336                                                 IB_QP_QKEY),
 337                         }
 338                 },
 339         },
 340         [IB_QPS_INIT]  = {
 341                 [IB_QPS_RESET] = { .valid = 1 },
 342                 [IB_QPS_ERR] =   { .valid = 1 },
 343                 [IB_QPS_INIT]  = {
 344                         .valid = 1,
 345                         .opt_param = {
 346                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 347                                                 IB_QP_PORT                      |
 348                                                 IB_QP_QKEY),
 349                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 350                                                 IB_QP_PORT                      |
 351                                                 IB_QP_ACCESS_FLAGS),
 352                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 353                                                 IB_QP_PORT                      |
 354                                                 IB_QP_ACCESS_FLAGS),
 355                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 356                                                 IB_QP_QKEY),
 357                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 358                                                 IB_QP_QKEY),
 359                         }
 360                 },
 361                 [IB_QPS_RTR]   = {
 362                         .valid = 1,
 363                         .req_param = {
 364                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 365                                                 IB_QP_PATH_MTU                  |
 366                                                 IB_QP_DEST_QPN                  |
 367                                                 IB_QP_RQ_PSN),
 368                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 369                                                 IB_QP_PATH_MTU                  |
 370                                                 IB_QP_DEST_QPN                  |
 371                                                 IB_QP_RQ_PSN                    |
 372                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 373                                                 IB_QP_MIN_RNR_TIMER),
 374                         },
 375                         .opt_param = {
 376                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 377                                                  IB_QP_QKEY),
 378                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 379                                                  IB_QP_ACCESS_FLAGS             |
 380                                                  IB_QP_PKEY_INDEX),
 381                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 382                                                  IB_QP_ACCESS_FLAGS             |
 383                                                  IB_QP_PKEY_INDEX),
 384                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 385                                                  IB_QP_QKEY),
 386                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 387                                                  IB_QP_QKEY),
 388                          }
 389                 }
 390         },
 391         [IB_QPS_RTR]   = {
 392                 [IB_QPS_RESET] = { .valid = 1 },
 393                 [IB_QPS_ERR] =   { .valid = 1 },
 394                 [IB_QPS_RTS]   = {
 395                         .valid = 1,
 396                         .req_param = {
 397                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 398                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 399                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 400                                                 IB_QP_RETRY_CNT                 |
 401                                                 IB_QP_RNR_RETRY                 |
 402                                                 IB_QP_SQ_PSN                    |
 403                                                 IB_QP_MAX_QP_RD_ATOMIC),
 404                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 405                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 406                         },
 407                         .opt_param = {
 408                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 409                                                  IB_QP_QKEY),
 410                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 411                                                  IB_QP_ALT_PATH                 |
 412                                                  IB_QP_ACCESS_FLAGS             |
 413                                                  IB_QP_PATH_MIG_STATE),
 414                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 415                                                  IB_QP_ALT_PATH                 |
 416                                                  IB_QP_ACCESS_FLAGS             |
 417                                                  IB_QP_MIN_RNR_TIMER            |
 418                                                  IB_QP_PATH_MIG_STATE),
 419                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 420                                                  IB_QP_QKEY),
 421                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 422                                                  IB_QP_QKEY),
 423                          }
 424                 }
 425         },
 426         [IB_QPS_RTS]   = {
 427                 [IB_QPS_RESET] = { .valid = 1 },
 428                 [IB_QPS_ERR] =   { .valid = 1 },
 429                 [IB_QPS_RTS]   = {
 430                         .valid = 1,
 431                         .opt_param = {
 432                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 433                                                 IB_QP_QKEY),
 434                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 435                                                 IB_QP_ACCESS_FLAGS              |
 436                                                 IB_QP_ALT_PATH                  |
 437                                                 IB_QP_PATH_MIG_STATE),
 438                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 439                                                 IB_QP_ACCESS_FLAGS              |
 440                                                 IB_QP_ALT_PATH                  |
 441                                                 IB_QP_PATH_MIG_STATE            |
 442                                                 IB_QP_MIN_RNR_TIMER),
 443                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 444                                                 IB_QP_QKEY),
 445                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 446                                                 IB_QP_QKEY),
 447                         }
 448                 },
 449                 [IB_QPS_SQD]   = {
 450                         .valid = 1,
 451                         .opt_param = {
 452                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 453                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 454                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 455                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 456                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 457                         }
 458                 },
 459         },
 460         [IB_QPS_SQD]   = {
 461                 [IB_QPS_RESET] = { .valid = 1 },
 462                 [IB_QPS_ERR] =   { .valid = 1 },
 463                 [IB_QPS_RTS]   = {
 464                         .valid = 1,
 465                         .opt_param = {
 466                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 467                                                 IB_QP_QKEY),
 468                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 469                                                 IB_QP_ALT_PATH                  |
 470                                                 IB_QP_ACCESS_FLAGS              |
 471                                                 IB_QP_PATH_MIG_STATE),
 472                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 473                                                 IB_QP_ALT_PATH                  |
 474                                                 IB_QP_ACCESS_FLAGS              |
 475                                                 IB_QP_MIN_RNR_TIMER             |
 476                                                 IB_QP_PATH_MIG_STATE),
 477                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 478                                                 IB_QP_QKEY),
 479                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 480                                                 IB_QP_QKEY),
 481                         }
 482                 },
 483                 [IB_QPS_SQD]   = {
 484                         .valid = 1,
 485                         .opt_param = {
 486                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 487                                                 IB_QP_QKEY),
 488                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 489                                                 IB_QP_ALT_PATH                  |
 490                                                 IB_QP_ACCESS_FLAGS              |
 491                                                 IB_QP_PKEY_INDEX                |
 492                                                 IB_QP_PATH_MIG_STATE),
 493                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 494                                                 IB_QP_AV                        |
 495                                                 IB_QP_TIMEOUT                   |
 496                                                 IB_QP_RETRY_CNT                 |
 497                                                 IB_QP_RNR_RETRY                 |
 498                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 499                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 500                                                 IB_QP_ALT_PATH                  |
 501                                                 IB_QP_ACCESS_FLAGS              |
 502                                                 IB_QP_PKEY_INDEX                |
 503                                                 IB_QP_MIN_RNR_TIMER             |
 504                                                 IB_QP_PATH_MIG_STATE),
 505                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 506                                                 IB_QP_QKEY),
 507                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 508                                                 IB_QP_QKEY),
 509                         }
 510                 }
 511         },
 512         [IB_QPS_SQE]   = {
 513                 [IB_QPS_RESET] = { .valid = 1 },
 514                 [IB_QPS_ERR] =   { .valid = 1 },
 515                 [IB_QPS_RTS]   = {
 516                         .valid = 1,
 517                         .opt_param = {
 518                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 519                                                 IB_QP_QKEY),
 520                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 521                                                 IB_QP_ACCESS_FLAGS),
 522                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 523                                                 IB_QP_QKEY),
 524                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 525                                                 IB_QP_QKEY),
 526                         }
 527                 }
 528         },
 529         [IB_QPS_ERR] = {
 530                 [IB_QPS_RESET] = { .valid = 1 },
 531                 [IB_QPS_ERR] =   { .valid = 1 }
 532         }
 533 };
 534
 535 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 536                        enum ib_qp_type type, enum ib_qp_attr_mask mask)
 537 {
 538         enum ib_qp_attr_mask req_param, opt_param;
 539
 540         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 541             next_state < 0 || next_state > IB_QPS_ERR)
 542                 return 0;
 543
 544         if (mask & IB_QP_CUR_STATE  &&
 545             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 546             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 547                 return 0;
 548
 549         if (!qp_state_table[cur_state][next_state].valid)
 550                 return 0;
 551
 552         req_param = qp_state_table[cur_state][next_state].req_param[type];
 553         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 554
 555         if ((mask & req_param) != req_param)
 556                 return 0;
 557
 558         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 559                 return 0;
 560
 561         return 1;
 562 }
 563 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 564
 565 int ib_modify_qp(struct ib_qp *qp,
 566                  struct ib_qp_attr *qp_attr,
 567                  int qp_attr_mask)
 568 {
 569         return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
 570 }
 571 EXPORT_SYMBOL(ib_modify_qp);
 572
 573 int ib_query_qp(struct ib_qp *qp,
 574                 struct ib_qp_attr *qp_attr,
 575                 int qp_attr_mask,
 576                 struct ib_qp_init_attr *qp_init_attr)
 577 {
 578         return qp->device->query_qp ?
 579                 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
 580                 -ENOSYS;
 581 }
 582 EXPORT_SYMBOL(ib_query_qp);
 583
 584 int ib_destroy_qp(struct ib_qp *qp)
 585 {
 586         struct ib_pd *pd;
 587         struct ib_cq *scq, *rcq;
 588         struct ib_srq *srq;
 589         int ret;
 590
 591         pd  = qp->pd;
 592         scq = qp->send_cq;
 593         rcq = qp->recv_cq;
 594         srq = qp->srq;
 595
 596         ret = qp->device->destroy_qp(qp);
 597         if (!ret) {
 598                 atomic_dec(&pd->usecnt);
 599                 atomic_dec(&scq->usecnt);
 600                 atomic_dec(&rcq->usecnt);
 601                 if (srq)
 602                         atomic_dec(&srq->usecnt);
 603         }
 604
 605         return ret;
 606 }
 607 EXPORT_SYMBOL(ib_destroy_qp);
 608
 609 /* Completion queues */
 610
 611 struct ib_cq *ib_create_cq(struct ib_device *device,
 612                            ib_comp_handler comp_handler,
 613                            void (*event_handler)(struct ib_event *, void *),
 614                            void *cq_context, int cqe, int comp_vector)
 615 {
 616         struct ib_cq *cq;
 617
 618         cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
 619
 620         if (!IS_ERR(cq)) {
 621                 cq->device        = device;
 622                 cq->uobject       = NULL;
 623                 cq->comp_handler  = comp_handler;
 624                 cq->event_handler = event_handler;
 625                 cq->cq_context    = cq_context;
 626                 atomic_set(&cq->usecnt, 0);
 627         }
 628
 629         return cq;
 630 }
 631 EXPORT_SYMBOL(ib_create_cq);
 632
 633 int ib_destroy_cq(struct ib_cq *cq)
 634 {
 635         if (atomic_read(&cq->usecnt))
 636                 return -EBUSY;
 637
 638         return cq->device->destroy_cq(cq);
 639 }
 640 EXPORT_SYMBOL(ib_destroy_cq);
 641
 642 int ib_resize_cq(struct ib_cq *cq, int cqe)
 643 {
 644         return cq->device->resize_cq ?
 645                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
 646 }
 647 EXPORT_SYMBOL(ib_resize_cq);
 648
 649 /* Memory regions */
 650
 651 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 652 {
 653         struct ib_mr *mr;
 654
 655         mr = pd->device->get_dma_mr(pd, mr_access_flags);
 656
 657         if (!IS_ERR(mr)) {
 658                 mr->device  = pd->device;
 659                 mr->pd      = pd;
 660                 mr->uobject = NULL;
 661                 atomic_inc(&pd->usecnt);
 662                 atomic_set(&mr->usecnt, 0);
 663         }
 664
 665         return mr;
 666 }
 667 EXPORT_SYMBOL(ib_get_dma_mr);
 668
 669 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
 670                              struct ib_phys_buf *phys_buf_array,
 671                              int num_phys_buf,
 672                              int mr_access_flags,
 673                              u64 *iova_start)
 674 {
 675         struct ib_mr *mr;
 676
 677         if (!pd->device->reg_phys_mr)
 678                 return ERR_PTR(-ENOSYS);
 679
 680         mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
 681                                      mr_access_flags, iova_start);
 682
 683         if (!IS_ERR(mr)) {
 684                 mr->device  = pd->device;
 685                 mr->pd      = pd;
 686                 mr->uobject = NULL;
 687                 atomic_inc(&pd->usecnt);
 688                 atomic_set(&mr->usecnt, 0);
 689         }
 690
 691         return mr;
 692 }
 693 EXPORT_SYMBOL(ib_reg_phys_mr);
 694
 695 int ib_rereg_phys_mr(struct ib_mr *mr,
 696                      int mr_rereg_mask,
 697                      struct ib_pd *pd,
 698                      struct ib_phys_buf *phys_buf_array,
 699                      int num_phys_buf,
 700                      int mr_access_flags,
 701                      u64 *iova_start)
 702 {
 703         struct ib_pd *old_pd;
 704         int ret;
 705
 706         if (!mr->device->rereg_phys_mr)
 707                 return -ENOSYS;
 708
 709         if (atomic_read(&mr->usecnt))
 710                 return -EBUSY;
 711
 712         old_pd = mr->pd;
 713
 714         ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
 715                                         phys_buf_array, num_phys_buf,
 716                                         mr_access_flags, iova_start);
 717
 718         if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
 719                 atomic_dec(&old_pd->usecnt);
 720                 atomic_inc(&pd->usecnt);
 721         }
 722
 723         return ret;
 724 }
 725 EXPORT_SYMBOL(ib_rereg_phys_mr);
 726
 727 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
 728 {
 729         return mr->device->query_mr ?
 730                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
 731 }
 732 EXPORT_SYMBOL(ib_query_mr);
 733
 734 int ib_dereg_mr(struct ib_mr *mr)
 735 {
 736         struct ib_pd *pd;
 737         int ret;
 738
 739         if (atomic_read(&mr->usecnt))
 740                 return -EBUSY;
 741
 742         pd = mr->pd;
 743         ret = mr->device->dereg_mr(mr);
 744         if (!ret)
 745                 atomic_dec(&pd->usecnt);
 746
 747         return ret;
 748 }
 749 EXPORT_SYMBOL(ib_dereg_mr);
 750
 751 /* Memory windows */
 752
 753 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
 754 {
 755         struct ib_mw *mw;
 756
 757         if (!pd->device->alloc_mw)
 758                 return ERR_PTR(-ENOSYS);
 759
 760         mw = pd->device->alloc_mw(pd);
 761         if (!IS_ERR(mw)) {
 762                 mw->device  = pd->device;
 763                 mw->pd      = pd;
 764                 mw->uobject = NULL;
 765                 atomic_inc(&pd->usecnt);
 766         }
 767
 768         return mw;
 769 }
 770 EXPORT_SYMBOL(ib_alloc_mw);
 771
 772 int ib_dealloc_mw(struct ib_mw *mw)
 773 {
 774         struct ib_pd *pd;
 775         int ret;
 776
 777         pd = mw->pd;
 778         ret = mw->device->dealloc_mw(mw);
 779         if (!ret)
 780                 atomic_dec(&pd->usecnt);
 781
 782         return ret;
 783 }
 784 EXPORT_SYMBOL(ib_dealloc_mw);
 785
 786 /* "Fast" memory regions */
 787
 788 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
 789                             int mr_access_flags,
 790                             struct ib_fmr_attr *fmr_attr)
 791 {
 792         struct ib_fmr *fmr;
 793
 794         if (!pd->device->alloc_fmr)
 795                 return ERR_PTR(-ENOSYS);
 796
 797         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
 798         if (!IS_ERR(fmr)) {
 799                 fmr->device = pd->device;
 800                 fmr->pd     = pd;
 801                 atomic_inc(&pd->usecnt);
 802         }
 803
 804         return fmr;
 805 }
 806 EXPORT_SYMBOL(ib_alloc_fmr);
 807
 808 int ib_unmap_fmr(struct list_head *fmr_list)
 809 {
 810         struct ib_fmr *fmr;
 811
 812         if (list_empty(fmr_list))
 813                 return 0;
 814
 815         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
 816         return fmr->device->unmap_fmr(fmr_list);
 817 }
 818 EXPORT_SYMBOL(ib_unmap_fmr);
 819
 820 int ib_dealloc_fmr(struct ib_fmr *fmr)
 821 {
 822         struct ib_pd *pd;
 823         int ret;
 824
 825         pd = fmr->pd;
 826         ret = fmr->device->dealloc_fmr(fmr);
 827         if (!ret)
 828                 atomic_dec(&pd->usecnt);
 829
 830         return ret;
 831 }
 832 EXPORT_SYMBOL(ib_dealloc_fmr);
 833
 834 /* Multicast groups */
 835
 836 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 837 {
 838         if (!qp->device->attach_mcast)
 839                 return -ENOSYS;
 840         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 841                 return -EINVAL;
 842
 843         return qp->device->attach_mcast(qp, gid, lid);
 844 }
 845 EXPORT_SYMBOL(ib_attach_mcast);
 846
 847 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 848 {
 849         if (!qp->device->detach_mcast)
 850                 return -ENOSYS;
 851         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 852                 return -EINVAL;
 853
 854         return qp->device->detach_mcast(qp, gid, lid);
 855 }
 856 EXPORT_SYMBOL(ib_detach_mcast);