drivers/infiniband/core/verbs.c

   1 /*
   2  * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
   3  * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
   4  * Copyright (c) 2004 Intel Corporation.  All rights reserved.
   5  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   6  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
   7  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   8  * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
   9  *
  10  * This software is available to you under a choice of one of two
  11  * licenses.  You may choose to be licensed under the terms of the GNU
  12  * General Public License (GPL) Version 2, available from the file
  13  * COPYING in the main directory of this source tree, or the
  14  * OpenIB.org BSD license below:
  15  *
  16  *     Redistribution and use in source and binary forms, with or
  17  *     without modification, are permitted provided that the following
  18  *     conditions are met:
  19  *
  20  *      - Redistributions of source code must retain the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer.
  23  *
  24  *      - Redistributions in binary form must reproduce the above
  25  *        copyright notice, this list of conditions and the following
  26  *        disclaimer in the documentation and/or other materials
  27  *        provided with the distribution.
  28  *
  29  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  30  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  31  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  32  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  33  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  34  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  35  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  36  * SOFTWARE.
  37  */
  38
  39 #include <linux/errno.h>
  40 #include <linux/err.h>
  41 #include <linux/export.h>
  42 #include <linux/string.h>
  43 #include <linux/slab.h>
  44
  45 #include <rdma/ib_verbs.h>
  46 #include <rdma/ib_cache.h>
  47
  48 int ib_rate_to_mult(enum ib_rate rate)
  49 {
  50         switch (rate) {
  51         case IB_RATE_2_5_GBPS: return  1;
  52         case IB_RATE_5_GBPS:   return  2;
  53         case IB_RATE_10_GBPS:  return  4;
  54         case IB_RATE_20_GBPS:  return  8;
  55         case IB_RATE_30_GBPS:  return 12;
  56         case IB_RATE_40_GBPS:  return 16;
  57         case IB_RATE_60_GBPS:  return 24;
  58         case IB_RATE_80_GBPS:  return 32;
  59         case IB_RATE_120_GBPS: return 48;
  60         default:               return -1;
  61         }
  62 }
  63 EXPORT_SYMBOL(ib_rate_to_mult);
  64
  65 enum ib_rate mult_to_ib_rate(int mult)
  66 {
  67         switch (mult) {
  68         case 1:  return IB_RATE_2_5_GBPS;
  69         case 2:  return IB_RATE_5_GBPS;
  70         case 4:  return IB_RATE_10_GBPS;
  71         case 8:  return IB_RATE_20_GBPS;
  72         case 12: return IB_RATE_30_GBPS;
  73         case 16: return IB_RATE_40_GBPS;
  74         case 24: return IB_RATE_60_GBPS;
  75         case 32: return IB_RATE_80_GBPS;
  76         case 48: return IB_RATE_120_GBPS;
  77         default: return IB_RATE_PORT_CURRENT;
  78         }
  79 }
  80 EXPORT_SYMBOL(mult_to_ib_rate);
  81
  82 int ib_rate_to_mbps(enum ib_rate rate)
  83 {
  84         switch (rate) {
  85         case IB_RATE_2_5_GBPS: return 2500;
  86         case IB_RATE_5_GBPS:   return 5000;
  87         case IB_RATE_10_GBPS:  return 10000;
  88         case IB_RATE_20_GBPS:  return 20000;
  89         case IB_RATE_30_GBPS:  return 30000;
  90         case IB_RATE_40_GBPS:  return 40000;
  91         case IB_RATE_60_GBPS:  return 60000;
  92         case IB_RATE_80_GBPS:  return 80000;
  93         case IB_RATE_120_GBPS: return 120000;
  94         case IB_RATE_14_GBPS:  return 14062;
  95         case IB_RATE_56_GBPS:  return 56250;
  96         case IB_RATE_112_GBPS: return 112500;
  97         case IB_RATE_168_GBPS: return 168750;
  98         case IB_RATE_25_GBPS:  return 25781;
  99         case IB_RATE_100_GBPS: return 103125;
 100         case IB_RATE_200_GBPS: return 206250;
 101         case IB_RATE_300_GBPS: return 309375;
 102         default:               return -1;
 103         }
 104 }
 105 EXPORT_SYMBOL(ib_rate_to_mbps);
 106
 107 enum rdma_transport_type
 108 rdma_node_get_transport(enum rdma_node_type node_type)
 109 {
 110         switch (node_type) {
 111         case RDMA_NODE_IB_CA:
 112         case RDMA_NODE_IB_SWITCH:
 113         case RDMA_NODE_IB_ROUTER:
 114                 return RDMA_TRANSPORT_IB;
 115         case RDMA_NODE_RNIC:
 116                 return RDMA_TRANSPORT_IWARP;
 117         default:
 118                 BUG();
 119                 return 0;
 120         }
 121 }
 122 EXPORT_SYMBOL(rdma_node_get_transport);
 123
 124 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
 125 {
 126         if (device->get_link_layer)
 127                 return device->get_link_layer(device, port_num);
 128
 129         switch (rdma_node_get_transport(device->node_type)) {
 130         case RDMA_TRANSPORT_IB:
 131                 return IB_LINK_LAYER_INFINIBAND;
 132         case RDMA_TRANSPORT_IWARP:
 133                 return IB_LINK_LAYER_ETHERNET;
 134         default:
 135                 return IB_LINK_LAYER_UNSPECIFIED;
 136         }
 137 }
 138 EXPORT_SYMBOL(rdma_port_get_link_layer);
 139
 140 /* Protection domains */
 141
 142 struct ib_pd *ib_alloc_pd(struct ib_device *device)
 143 {
 144         struct ib_pd *pd;
 145
 146         pd = device->alloc_pd(device, NULL, NULL);
 147
 148         if (!IS_ERR(pd)) {
 149                 pd->device  = device;
 150                 pd->uobject = NULL;
 151                 atomic_set(&pd->usecnt, 0);
 152         }
 153
 154         return pd;
 155 }
 156 EXPORT_SYMBOL(ib_alloc_pd);
 157
 158 int ib_dealloc_pd(struct ib_pd *pd)
 159 {
 160         if (atomic_read(&pd->usecnt))
 161                 return -EBUSY;
 162
 163         return pd->device->dealloc_pd(pd);
 164 }
 165 EXPORT_SYMBOL(ib_dealloc_pd);
 166
 167 /* Address handles */
 168
 169 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 170 {
 171         struct ib_ah *ah;
 172
 173         ah = pd->device->create_ah(pd, ah_attr);
 174
 175         if (!IS_ERR(ah)) {
 176                 ah->device  = pd->device;
 177                 ah->pd      = pd;
 178                 ah->uobject = NULL;
 179                 atomic_inc(&pd->usecnt);
 180         }
 181
 182         return ah;
 183 }
 184 EXPORT_SYMBOL(ib_create_ah);
 185
 186 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
 187                        struct ib_grh *grh, struct ib_ah_attr *ah_attr)
 188 {
 189         u32 flow_class;
 190         u16 gid_index;
 191         int ret;
 192
 193         memset(ah_attr, 0, sizeof *ah_attr);
 194         ah_attr->dlid = wc->slid;
 195         ah_attr->sl = wc->sl;
 196         ah_attr->src_path_bits = wc->dlid_path_bits;
 197         ah_attr->port_num = port_num;
 198
 199         if (wc->wc_flags & IB_WC_GRH) {
 200                 ah_attr->ah_flags = IB_AH_GRH;
 201                 ah_attr->grh.dgid = grh->sgid;
 202
 203                 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
 204                                          &gid_index);
 205                 if (ret)
 206                         return ret;
 207
 208                 ah_attr->grh.sgid_index = (u8) gid_index;
 209                 flow_class = be32_to_cpu(grh->version_tclass_flow);
 210                 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
 211                 ah_attr->grh.hop_limit = 0xFF;
 212                 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
 213         }
 214         return 0;
 215 }
 216 EXPORT_SYMBOL(ib_init_ah_from_wc);
 217
 218 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
 219                                    struct ib_grh *grh, u8 port_num)
 220 {
 221         struct ib_ah_attr ah_attr;
 222         int ret;
 223
 224         ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
 225         if (ret)
 226                 return ERR_PTR(ret);
 227
 228         return ib_create_ah(pd, &ah_attr);
 229 }
 230 EXPORT_SYMBOL(ib_create_ah_from_wc);
 231
 232 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 233 {
 234         return ah->device->modify_ah ?
 235                 ah->device->modify_ah(ah, ah_attr) :
 236                 -ENOSYS;
 237 }
 238 EXPORT_SYMBOL(ib_modify_ah);
 239
 240 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
 241 {
 242         return ah->device->query_ah ?
 243                 ah->device->query_ah(ah, ah_attr) :
 244                 -ENOSYS;
 245 }
 246 EXPORT_SYMBOL(ib_query_ah);
 247
 248 int ib_destroy_ah(struct ib_ah *ah)
 249 {
 250         struct ib_pd *pd;
 251         int ret;
 252
 253         pd = ah->pd;
 254         ret = ah->device->destroy_ah(ah);
 255         if (!ret)
 256                 atomic_dec(&pd->usecnt);
 257
 258         return ret;
 259 }
 260 EXPORT_SYMBOL(ib_destroy_ah);
 261
 262 /* Shared receive queues */
 263
 264 struct ib_srq *ib_create_srq(struct ib_pd *pd,
 265                              struct ib_srq_init_attr *srq_init_attr)
 266 {
 267         struct ib_srq *srq;
 268
 269         if (!pd->device->create_srq)
 270                 return ERR_PTR(-ENOSYS);
 271
 272         srq = pd->device->create_srq(pd, srq_init_attr, NULL);
 273
 274         if (!IS_ERR(srq)) {
 275                 srq->device        = pd->device;
 276                 srq->pd            = pd;
 277                 srq->uobject       = NULL;
 278                 srq->event_handler = srq_init_attr->event_handler;
 279                 srq->srq_context   = srq_init_attr->srq_context;
 280                 srq->srq_type      = srq_init_attr->srq_type;
 281                 if (srq->srq_type == IB_SRQT_XRC) {
 282                         srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
 283                         srq->ext.xrc.cq   = srq_init_attr->ext.xrc.cq;
 284                         atomic_inc(&srq->ext.xrc.xrcd->usecnt);
 285                         atomic_inc(&srq->ext.xrc.cq->usecnt);
 286                 }
 287                 atomic_inc(&pd->usecnt);
 288                 atomic_set(&srq->usecnt, 0);
 289         }
 290
 291         return srq;
 292 }
 293 EXPORT_SYMBOL(ib_create_srq);
 294
 295 int ib_modify_srq(struct ib_srq *srq,
 296                   struct ib_srq_attr *srq_attr,
 297                   enum ib_srq_attr_mask srq_attr_mask)
 298 {
 299         return srq->device->modify_srq ?
 300                 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
 301                 -ENOSYS;
 302 }
 303 EXPORT_SYMBOL(ib_modify_srq);
 304
 305 int ib_query_srq(struct ib_srq *srq,
 306                  struct ib_srq_attr *srq_attr)
 307 {
 308         return srq->device->query_srq ?
 309                 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
 310 }
 311 EXPORT_SYMBOL(ib_query_srq);
 312
 313 int ib_destroy_srq(struct ib_srq *srq)
 314 {
 315         struct ib_pd *pd;
 316         enum ib_srq_type srq_type;
 317         struct ib_xrcd *uninitialized_var(xrcd);
 318         struct ib_cq *uninitialized_var(cq);
 319         int ret;
 320
 321         if (atomic_read(&srq->usecnt))
 322                 return -EBUSY;
 323
 324         pd = srq->pd;
 325         srq_type = srq->srq_type;
 326         if (srq_type == IB_SRQT_XRC) {
 327                 xrcd = srq->ext.xrc.xrcd;
 328                 cq = srq->ext.xrc.cq;
 329         }
 330
 331         ret = srq->device->destroy_srq(srq);
 332         if (!ret) {
 333                 atomic_dec(&pd->usecnt);
 334                 if (srq_type == IB_SRQT_XRC) {
 335                         atomic_dec(&xrcd->usecnt);
 336                         atomic_dec(&cq->usecnt);
 337                 }
 338         }
 339
 340         return ret;
 341 }
 342 EXPORT_SYMBOL(ib_destroy_srq);
 343
 344 /* Queue pairs */
 345
 346 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
 347 {
 348         struct ib_qp *qp = context;
 349         unsigned long flags;
 350
 351         spin_lock_irqsave(&qp->device->event_handler_lock, flags);
 352         list_for_each_entry(event->element.qp, &qp->open_list, open_list)
 353                 if (event->element.qp->event_handler)
 354                         event->element.qp->event_handler(event, event->element.qp->qp_context);
 355         spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
 356 }
 357
 358 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
 359 {
 360         mutex_lock(&xrcd->tgt_qp_mutex);
 361         list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
 362         mutex_unlock(&xrcd->tgt_qp_mutex);
 363 }
 364
 365 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
 366                                   void (*event_handler)(struct ib_event *, void *),
 367                                   void *qp_context)
 368 {
 369         struct ib_qp *qp;
 370         unsigned long flags;
 371
 372         qp = kzalloc(sizeof *qp, GFP_KERNEL);
 373         if (!qp)
 374                 return ERR_PTR(-ENOMEM);
 375
 376         qp->real_qp = real_qp;
 377         atomic_inc(&real_qp->usecnt);
 378         qp->device = real_qp->device;
 379         qp->event_handler = event_handler;
 380         qp->qp_context = qp_context;
 381         qp->qp_num = real_qp->qp_num;
 382         qp->qp_type = real_qp->qp_type;
 383
 384         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
 385         list_add(&qp->open_list, &real_qp->open_list);
 386         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
 387
 388         return qp;
 389 }
 390
 391 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
 392                          struct ib_qp_open_attr *qp_open_attr)
 393 {
 394         struct ib_qp *qp, *real_qp;
 395
 396         if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
 397                 return ERR_PTR(-EINVAL);
 398
 399         qp = ERR_PTR(-EINVAL);
 400         mutex_lock(&xrcd->tgt_qp_mutex);
 401         list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
 402                 if (real_qp->qp_num == qp_open_attr->qp_num) {
 403                         qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
 404                                           qp_open_attr->qp_context);
 405                         break;
 406                 }
 407         }
 408         mutex_unlock(&xrcd->tgt_qp_mutex);
 409         return qp;
 410 }
 411 EXPORT_SYMBOL(ib_open_qp);
 412
 413 struct ib_qp *ib_create_qp(struct ib_pd *pd,
 414                            struct ib_qp_init_attr *qp_init_attr)
 415 {
 416         struct ib_qp *qp, *real_qp;
 417         struct ib_device *device;
 418
 419         device = pd ? pd->device : qp_init_attr->xrcd->device;
 420         qp = device->create_qp(pd, qp_init_attr, NULL);
 421
 422         if (!IS_ERR(qp)) {
 423                 qp->device     = device;
 424                 qp->real_qp    = qp;
 425                 qp->uobject    = NULL;
 426                 qp->qp_type    = qp_init_attr->qp_type;
 427
 428                 atomic_set(&qp->usecnt, 0);
 429                 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
 430                         qp->event_handler = __ib_shared_qp_event_handler;
 431                         qp->qp_context = qp;
 432                         qp->pd = NULL;
 433                         qp->send_cq = qp->recv_cq = NULL;
 434                         qp->srq = NULL;
 435                         qp->xrcd = qp_init_attr->xrcd;
 436                         atomic_inc(&qp_init_attr->xrcd->usecnt);
 437                         INIT_LIST_HEAD(&qp->open_list);
 438
 439                         real_qp = qp;
 440                         qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
 441                                           qp_init_attr->qp_context);
 442                         if (!IS_ERR(qp))
 443                                 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
 444                         else
 445                                 real_qp->device->destroy_qp(real_qp);
 446                 } else {
 447                         qp->event_handler = qp_init_attr->event_handler;
 448                         qp->qp_context = qp_init_attr->qp_context;
 449                         if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
 450                                 qp->recv_cq = NULL;
 451                                 qp->srq = NULL;
 452                         } else {
 453                                 qp->recv_cq = qp_init_attr->recv_cq;
 454                                 atomic_inc(&qp_init_attr->recv_cq->usecnt);
 455                                 qp->srq = qp_init_attr->srq;
 456                                 if (qp->srq)
 457                                         atomic_inc(&qp_init_attr->srq->usecnt);
 458                         }
 459
 460                         qp->pd      = pd;
 461                         qp->send_cq = qp_init_attr->send_cq;
 462                         qp->xrcd    = NULL;
 463
 464                         atomic_inc(&pd->usecnt);
 465                         atomic_inc(&qp_init_attr->send_cq->usecnt);
 466                 }
 467         }
 468
 469         return qp;
 470 }
 471 EXPORT_SYMBOL(ib_create_qp);
 472
 473 static const struct {
 474         int                     valid;
 475         enum ib_qp_attr_mask    req_param[IB_QPT_MAX];
 476         enum ib_qp_attr_mask    opt_param[IB_QPT_MAX];
 477 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 478         [IB_QPS_RESET] = {
 479                 [IB_QPS_RESET] = { .valid = 1 },
 480                 [IB_QPS_INIT]  = {
 481                         .valid = 1,
 482                         .req_param = {
 483                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 484                                                 IB_QP_PORT                      |
 485                                                 IB_QP_QKEY),
 486                                 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
 487                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 488                                                 IB_QP_PORT                      |
 489                                                 IB_QP_ACCESS_FLAGS),
 490                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 491                                                 IB_QP_PORT                      |
 492                                                 IB_QP_ACCESS_FLAGS),
 493                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 494                                                 IB_QP_PORT                      |
 495                                                 IB_QP_ACCESS_FLAGS),
 496                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 497                                                 IB_QP_PORT                      |
 498                                                 IB_QP_ACCESS_FLAGS),
 499                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 500                                                 IB_QP_QKEY),
 501                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 502                                                 IB_QP_QKEY),
 503                         }
 504                 },
 505         },
 506         [IB_QPS_INIT]  = {
 507                 [IB_QPS_RESET] = { .valid = 1 },
 508                 [IB_QPS_ERR] =   { .valid = 1 },
 509                 [IB_QPS_INIT]  = {
 510                         .valid = 1,
 511                         .opt_param = {
 512                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 513                                                 IB_QP_PORT                      |
 514                                                 IB_QP_QKEY),
 515                                 [IB_QPT_UC]  = (IB_QP_PKEY_INDEX                |
 516                                                 IB_QP_PORT                      |
 517                                                 IB_QP_ACCESS_FLAGS),
 518                                 [IB_QPT_RC]  = (IB_QP_PKEY_INDEX                |
 519                                                 IB_QP_PORT                      |
 520                                                 IB_QP_ACCESS_FLAGS),
 521                                 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX            |
 522                                                 IB_QP_PORT                      |
 523                                                 IB_QP_ACCESS_FLAGS),
 524                                 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX            |
 525                                                 IB_QP_PORT                      |
 526                                                 IB_QP_ACCESS_FLAGS),
 527                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 528                                                 IB_QP_QKEY),
 529                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 530                                                 IB_QP_QKEY),
 531                         }
 532                 },
 533                 [IB_QPS_RTR]   = {
 534                         .valid = 1,
 535                         .req_param = {
 536                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 537                                                 IB_QP_PATH_MTU                  |
 538                                                 IB_QP_DEST_QPN                  |
 539                                                 IB_QP_RQ_PSN),
 540                                 [IB_QPT_RC]  = (IB_QP_AV                        |
 541                                                 IB_QP_PATH_MTU                  |
 542                                                 IB_QP_DEST_QPN                  |
 543                                                 IB_QP_RQ_PSN                    |
 544                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 545                                                 IB_QP_MIN_RNR_TIMER),
 546                                 [IB_QPT_XRC_INI] = (IB_QP_AV                    |
 547                                                 IB_QP_PATH_MTU                  |
 548                                                 IB_QP_DEST_QPN                  |
 549                                                 IB_QP_RQ_PSN),
 550                                 [IB_QPT_XRC_TGT] = (IB_QP_AV                    |
 551                                                 IB_QP_PATH_MTU                  |
 552                                                 IB_QP_DEST_QPN                  |
 553                                                 IB_QP_RQ_PSN                    |
 554                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 555                                                 IB_QP_MIN_RNR_TIMER),
 556                         },
 557                         .opt_param = {
 558                                  [IB_QPT_UD]  = (IB_QP_PKEY_INDEX               |
 559                                                  IB_QP_QKEY),
 560                                  [IB_QPT_UC]  = (IB_QP_ALT_PATH                 |
 561                                                  IB_QP_ACCESS_FLAGS             |
 562                                                  IB_QP_PKEY_INDEX),
 563                                  [IB_QPT_RC]  = (IB_QP_ALT_PATH                 |
 564                                                  IB_QP_ACCESS_FLAGS             |
 565                                                  IB_QP_PKEY_INDEX),
 566                                  [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH             |
 567                                                  IB_QP_ACCESS_FLAGS             |
 568                                                  IB_QP_PKEY_INDEX),
 569                                  [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH             |
 570                                                  IB_QP_ACCESS_FLAGS             |
 571                                                  IB_QP_PKEY_INDEX),
 572                                  [IB_QPT_SMI] = (IB_QP_PKEY_INDEX               |
 573                                                  IB_QP_QKEY),
 574                                  [IB_QPT_GSI] = (IB_QP_PKEY_INDEX               |
 575                                                  IB_QP_QKEY),
 576                          }
 577                 }
 578         },
 579         [IB_QPS_RTR]   = {
 580                 [IB_QPS_RESET] = { .valid = 1 },
 581                 [IB_QPS_ERR] =   { .valid = 1 },
 582                 [IB_QPS_RTS]   = {
 583                         .valid = 1,
 584                         .req_param = {
 585                                 [IB_QPT_UD]  = IB_QP_SQ_PSN,
 586                                 [IB_QPT_UC]  = IB_QP_SQ_PSN,
 587                                 [IB_QPT_RC]  = (IB_QP_TIMEOUT                   |
 588                                                 IB_QP_RETRY_CNT                 |
 589                                                 IB_QP_RNR_RETRY                 |
 590                                                 IB_QP_SQ_PSN                    |
 591                                                 IB_QP_MAX_QP_RD_ATOMIC),
 592                                 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT               |
 593                                                 IB_QP_RETRY_CNT                 |
 594                                                 IB_QP_RNR_RETRY                 |
 595                                                 IB_QP_SQ_PSN                    |
 596                                                 IB_QP_MAX_QP_RD_ATOMIC),
 597                                 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT               |
 598                                                 IB_QP_SQ_PSN),
 599                                 [IB_QPT_SMI] = IB_QP_SQ_PSN,
 600                                 [IB_QPT_GSI] = IB_QP_SQ_PSN,
 601                         },
 602                         .opt_param = {
 603                                  [IB_QPT_UD]  = (IB_QP_CUR_STATE                |
 604                                                  IB_QP_QKEY),
 605                                  [IB_QPT_UC]  = (IB_QP_CUR_STATE                |
 606                                                  IB_QP_ALT_PATH                 |
 607                                                  IB_QP_ACCESS_FLAGS             |
 608                                                  IB_QP_PATH_MIG_STATE),
 609                                  [IB_QPT_RC]  = (IB_QP_CUR_STATE                |
 610                                                  IB_QP_ALT_PATH                 |
 611                                                  IB_QP_ACCESS_FLAGS             |
 612                                                  IB_QP_MIN_RNR_TIMER            |
 613                                                  IB_QP_PATH_MIG_STATE),
 614                                  [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE            |
 615                                                  IB_QP_ALT_PATH                 |
 616                                                  IB_QP_ACCESS_FLAGS             |
 617                                                  IB_QP_PATH_MIG_STATE),
 618                                  [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE            |
 619                                                  IB_QP_ALT_PATH                 |
 620                                                  IB_QP_ACCESS_FLAGS             |
 621                                                  IB_QP_MIN_RNR_TIMER            |
 622                                                  IB_QP_PATH_MIG_STATE),
 623                                  [IB_QPT_SMI] = (IB_QP_CUR_STATE                |
 624                                                  IB_QP_QKEY),
 625                                  [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
 626                                                  IB_QP_QKEY),
 627                          }
 628                 }
 629         },
 630         [IB_QPS_RTS]   = {
 631                 [IB_QPS_RESET] = { .valid = 1 },
 632                 [IB_QPS_ERR] =   { .valid = 1 },
 633                 [IB_QPS_RTS]   = {
 634                         .valid = 1,
 635                         .opt_param = {
 636                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 637                                                 IB_QP_QKEY),
 638                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 639                                                 IB_QP_ACCESS_FLAGS              |
 640                                                 IB_QP_ALT_PATH                  |
 641                                                 IB_QP_PATH_MIG_STATE),
 642                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 643                                                 IB_QP_ACCESS_FLAGS              |
 644                                                 IB_QP_ALT_PATH                  |
 645                                                 IB_QP_PATH_MIG_STATE            |
 646                                                 IB_QP_MIN_RNR_TIMER),
 647                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 648                                                 IB_QP_ACCESS_FLAGS              |
 649                                                 IB_QP_ALT_PATH                  |
 650                                                 IB_QP_PATH_MIG_STATE),
 651                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 652                                                 IB_QP_ACCESS_FLAGS              |
 653                                                 IB_QP_ALT_PATH                  |
 654                                                 IB_QP_PATH_MIG_STATE            |
 655                                                 IB_QP_MIN_RNR_TIMER),
 656                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 657                                                 IB_QP_QKEY),
 658                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 659                                                 IB_QP_QKEY),
 660                         }
 661                 },
 662                 [IB_QPS_SQD]   = {
 663                         .valid = 1,
 664                         .opt_param = {
 665                                 [IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 666                                 [IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 667                                 [IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
 668                                 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 669                                 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
 670                                 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
 671                                 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
 672                         }
 673                 },
 674         },
 675         [IB_QPS_SQD]   = {
 676                 [IB_QPS_RESET] = { .valid = 1 },
 677                 [IB_QPS_ERR] =   { .valid = 1 },
 678                 [IB_QPS_RTS]   = {
 679                         .valid = 1,
 680                         .opt_param = {
 681                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 682                                                 IB_QP_QKEY),
 683                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 684                                                 IB_QP_ALT_PATH                  |
 685                                                 IB_QP_ACCESS_FLAGS              |
 686                                                 IB_QP_PATH_MIG_STATE),
 687                                 [IB_QPT_RC]  = (IB_QP_CUR_STATE                 |
 688                                                 IB_QP_ALT_PATH                  |
 689                                                 IB_QP_ACCESS_FLAGS              |
 690                                                 IB_QP_MIN_RNR_TIMER             |
 691                                                 IB_QP_PATH_MIG_STATE),
 692                                 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE             |
 693                                                 IB_QP_ALT_PATH                  |
 694                                                 IB_QP_ACCESS_FLAGS              |
 695                                                 IB_QP_PATH_MIG_STATE),
 696                                 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE             |
 697                                                 IB_QP_ALT_PATH                  |
 698                                                 IB_QP_ACCESS_FLAGS              |
 699                                                 IB_QP_MIN_RNR_TIMER             |
 700                                                 IB_QP_PATH_MIG_STATE),
 701                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 702                                                 IB_QP_QKEY),
 703                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 704                                                 IB_QP_QKEY),
 705                         }
 706                 },
 707                 [IB_QPS_SQD]   = {
 708                         .valid = 1,
 709                         .opt_param = {
 710                                 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX                |
 711                                                 IB_QP_QKEY),
 712                                 [IB_QPT_UC]  = (IB_QP_AV                        |
 713                                                 IB_QP_ALT_PATH                  |
 714                                                 IB_QP_ACCESS_FLAGS              |
 715                                                 IB_QP_PKEY_INDEX                |
 716                                                 IB_QP_PATH_MIG_STATE),
 717                                 [IB_QPT_RC]  = (IB_QP_PORT                      |
 718                                                 IB_QP_AV                        |
 719                                                 IB_QP_TIMEOUT                   |
 720                                                 IB_QP_RETRY_CNT                 |
 721                                                 IB_QP_RNR_RETRY                 |
 722                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 723                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 724                                                 IB_QP_ALT_PATH                  |
 725                                                 IB_QP_ACCESS_FLAGS              |
 726                                                 IB_QP_PKEY_INDEX                |
 727                                                 IB_QP_MIN_RNR_TIMER             |
 728                                                 IB_QP_PATH_MIG_STATE),
 729                                 [IB_QPT_XRC_INI] = (IB_QP_PORT                  |
 730                                                 IB_QP_AV                        |
 731                                                 IB_QP_TIMEOUT                   |
 732                                                 IB_QP_RETRY_CNT                 |
 733                                                 IB_QP_RNR_RETRY                 |
 734                                                 IB_QP_MAX_QP_RD_ATOMIC          |
 735                                                 IB_QP_ALT_PATH                  |
 736                                                 IB_QP_ACCESS_FLAGS              |
 737                                                 IB_QP_PKEY_INDEX                |
 738                                                 IB_QP_PATH_MIG_STATE),
 739                                 [IB_QPT_XRC_TGT] = (IB_QP_PORT                  |
 740                                                 IB_QP_AV                        |
 741                                                 IB_QP_TIMEOUT                   |
 742                                                 IB_QP_MAX_DEST_RD_ATOMIC        |
 743                                                 IB_QP_ALT_PATH                  |
 744                                                 IB_QP_ACCESS_FLAGS              |
 745                                                 IB_QP_PKEY_INDEX                |
 746                                                 IB_QP_MIN_RNR_TIMER             |
 747                                                 IB_QP_PATH_MIG_STATE),
 748                                 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX                |
 749                                                 IB_QP_QKEY),
 750                                 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX                |
 751                                                 IB_QP_QKEY),
 752                         }
 753                 }
 754         },
 755         [IB_QPS_SQE]   = {
 756                 [IB_QPS_RESET] = { .valid = 1 },
 757                 [IB_QPS_ERR] =   { .valid = 1 },
 758                 [IB_QPS_RTS]   = {
 759                         .valid = 1,
 760                         .opt_param = {
 761                                 [IB_QPT_UD]  = (IB_QP_CUR_STATE                 |
 762                                                 IB_QP_QKEY),
 763                                 [IB_QPT_UC]  = (IB_QP_CUR_STATE                 |
 764                                                 IB_QP_ACCESS_FLAGS),
 765                                 [IB_QPT_SMI] = (IB_QP_CUR_STATE                 |
 766                                                 IB_QP_QKEY),
 767                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                 |
 768                                                 IB_QP_QKEY),
 769                         }
 770                 }
 771         },
 772         [IB_QPS_ERR] = {
 773                 [IB_QPS_RESET] = { .valid = 1 },
 774                 [IB_QPS_ERR] =   { .valid = 1 }
 775         }
 776 };
 777
 778 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 779                        enum ib_qp_type type, enum ib_qp_attr_mask mask)
 780 {
 781         enum ib_qp_attr_mask req_param, opt_param;
 782
 783         if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
 784             next_state < 0 || next_state > IB_QPS_ERR)
 785                 return 0;
 786
 787         if (mask & IB_QP_CUR_STATE  &&
 788             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 789             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 790                 return 0;
 791
 792         if (!qp_state_table[cur_state][next_state].valid)
 793                 return 0;
 794
 795         req_param = qp_state_table[cur_state][next_state].req_param[type];
 796         opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 797
 798         if ((mask & req_param) != req_param)
 799                 return 0;
 800
 801         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 802                 return 0;
 803
 804         return 1;
 805 }
 806 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 807
 808 int ib_modify_qp(struct ib_qp *qp,
 809                  struct ib_qp_attr *qp_attr,
 810                  int qp_attr_mask)
 811 {
 812         return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
 813 }
 814 EXPORT_SYMBOL(ib_modify_qp);
 815
 816 int ib_query_qp(struct ib_qp *qp,
 817                 struct ib_qp_attr *qp_attr,
 818                 int qp_attr_mask,
 819                 struct ib_qp_init_attr *qp_init_attr)
 820 {
 821         return qp->device->query_qp ?
 822                 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
 823                 -ENOSYS;
 824 }
 825 EXPORT_SYMBOL(ib_query_qp);
 826
 827 int ib_close_qp(struct ib_qp *qp)
 828 {
 829         struct ib_qp *real_qp;
 830         unsigned long flags;
 831
 832         real_qp = qp->real_qp;
 833         if (real_qp == qp)
 834                 return -EINVAL;
 835
 836         spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
 837         list_del(&qp->open_list);
 838         spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
 839
 840         atomic_dec(&real_qp->usecnt);
 841         kfree(qp);
 842
 843         return 0;
 844 }
 845 EXPORT_SYMBOL(ib_close_qp);
 846
 847 static int __ib_destroy_shared_qp(struct ib_qp *qp)
 848 {
 849         struct ib_xrcd *xrcd;
 850         struct ib_qp *real_qp;
 851         int ret;
 852
 853         real_qp = qp->real_qp;
 854         xrcd = real_qp->xrcd;
 855
 856         mutex_lock(&xrcd->tgt_qp_mutex);
 857         ib_close_qp(qp);
 858         if (atomic_read(&real_qp->usecnt) == 0)
 859                 list_del(&real_qp->xrcd_list);
 860         else
 861                 real_qp = NULL;
 862         mutex_unlock(&xrcd->tgt_qp_mutex);
 863
 864         if (real_qp) {
 865                 ret = ib_destroy_qp(real_qp);
 866                 if (!ret)
 867                         atomic_dec(&xrcd->usecnt);
 868                 else
 869                         __ib_insert_xrcd_qp(xrcd, real_qp);
 870         }
 871
 872         return 0;
 873 }
 874
 875 int ib_destroy_qp(struct ib_qp *qp)
 876 {
 877         struct ib_pd *pd;
 878         struct ib_cq *scq, *rcq;
 879         struct ib_srq *srq;
 880         int ret;
 881
 882         if (atomic_read(&qp->usecnt))
 883                 return -EBUSY;
 884
 885         if (qp->real_qp != qp)
 886                 return __ib_destroy_shared_qp(qp);
 887
 888         pd   = qp->pd;
 889         scq  = qp->send_cq;
 890         rcq  = qp->recv_cq;
 891         srq  = qp->srq;
 892
 893         ret = qp->device->destroy_qp(qp);
 894         if (!ret) {
 895                 if (pd)
 896                         atomic_dec(&pd->usecnt);
 897                 if (scq)
 898                         atomic_dec(&scq->usecnt);
 899                 if (rcq)
 900                         atomic_dec(&rcq->usecnt);
 901                 if (srq)
 902                         atomic_dec(&srq->usecnt);
 903         }
 904
 905         return ret;
 906 }
 907 EXPORT_SYMBOL(ib_destroy_qp);
 908
 909 /* Completion queues */
 910
 911 struct ib_cq *ib_create_cq(struct ib_device *device,
 912                            ib_comp_handler comp_handler,
 913                            void (*event_handler)(struct ib_event *, void *),
 914                            void *cq_context, int cqe, int comp_vector)
 915 {
 916         struct ib_cq *cq;
 917
 918         cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
 919
 920         if (!IS_ERR(cq)) {
 921                 cq->device        = device;
 922                 cq->uobject       = NULL;
 923                 cq->comp_handler  = comp_handler;
 924                 cq->event_handler = event_handler;
 925                 cq->cq_context    = cq_context;
 926                 atomic_set(&cq->usecnt, 0);
 927         }
 928
 929         return cq;
 930 }
 931 EXPORT_SYMBOL(ib_create_cq);
 932
 933 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
 934 {
 935         return cq->device->modify_cq ?
 936                 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
 937 }
 938 EXPORT_SYMBOL(ib_modify_cq);
 939
 940 int ib_destroy_cq(struct ib_cq *cq)
 941 {
 942         if (atomic_read(&cq->usecnt))
 943                 return -EBUSY;
 944
 945         return cq->device->destroy_cq(cq);
 946 }
 947 EXPORT_SYMBOL(ib_destroy_cq);
 948
 949 int ib_resize_cq(struct ib_cq *cq, int cqe)
 950 {
 951         return cq->device->resize_cq ?
 952                 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
 953 }
 954 EXPORT_SYMBOL(ib_resize_cq);
 955
 956 /* Memory regions */
 957
 958 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
 959 {
 960         struct ib_mr *mr;
 961
 962         mr = pd->device->get_dma_mr(pd, mr_access_flags);
 963
 964         if (!IS_ERR(mr)) {
 965                 mr->device  = pd->device;
 966                 mr->pd      = pd;
 967                 mr->uobject = NULL;
 968                 atomic_inc(&pd->usecnt);
 969                 atomic_set(&mr->usecnt, 0);
 970         }
 971
 972         return mr;
 973 }
 974 EXPORT_SYMBOL(ib_get_dma_mr);
 975
 976 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
 977                              struct ib_phys_buf *phys_buf_array,
 978                              int num_phys_buf,
 979                              int mr_access_flags,
 980                              u64 *iova_start)
 981 {
 982         struct ib_mr *mr;
 983
 984         if (!pd->device->reg_phys_mr)
 985                 return ERR_PTR(-ENOSYS);
 986
 987         mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
 988                                      mr_access_flags, iova_start);
 989
 990         if (!IS_ERR(mr)) {
 991                 mr->device  = pd->device;
 992                 mr->pd      = pd;
 993                 mr->uobject = NULL;
 994                 atomic_inc(&pd->usecnt);
 995                 atomic_set(&mr->usecnt, 0);
 996         }
 997
 998         return mr;
 999 }
1000 EXPORT_SYMBOL(ib_reg_phys_mr);
1001
1002 int ib_rereg_phys_mr(struct ib_mr *mr,
1003                      int mr_rereg_mask,
1004                      struct ib_pd *pd,
1005                      struct ib_phys_buf *phys_buf_array,
1006                      int num_phys_buf,
1007                      int mr_access_flags,
1008                      u64 *iova_start)
1009 {
1010         struct ib_pd *old_pd;
1011         int ret;
1012
1013         if (!mr->device->rereg_phys_mr)
1014                 return -ENOSYS;
1015
1016         if (atomic_read(&mr->usecnt))
1017                 return -EBUSY;
1018
1019         old_pd = mr->pd;
1020
1021         ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1022                                         phys_buf_array, num_phys_buf,
1023                                         mr_access_flags, iova_start);
1024
1025         if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1026                 atomic_dec(&old_pd->usecnt);
1027                 atomic_inc(&pd->usecnt);
1028         }
1029
1030         return ret;
1031 }
1032 EXPORT_SYMBOL(ib_rereg_phys_mr);
1033
1034 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1035 {
1036         return mr->device->query_mr ?
1037                 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1038 }
1039 EXPORT_SYMBOL(ib_query_mr);
1040
1041 int ib_dereg_mr(struct ib_mr *mr)
1042 {
1043         struct ib_pd *pd;
1044         int ret;
1045
1046         if (atomic_read(&mr->usecnt))
1047                 return -EBUSY;
1048
1049         pd = mr->pd;
1050         ret = mr->device->dereg_mr(mr);
1051         if (!ret)
1052                 atomic_dec(&pd->usecnt);
1053
1054         return ret;
1055 }
1056 EXPORT_SYMBOL(ib_dereg_mr);
1057
1058 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1059 {
1060         struct ib_mr *mr;
1061
1062         if (!pd->device->alloc_fast_reg_mr)
1063                 return ERR_PTR(-ENOSYS);
1064
1065         mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1066
1067         if (!IS_ERR(mr)) {
1068                 mr->device  = pd->device;
1069                 mr->pd      = pd;
1070                 mr->uobject = NULL;
1071                 atomic_inc(&pd->usecnt);
1072                 atomic_set(&mr->usecnt, 0);
1073         }
1074
1075         return mr;
1076 }
1077 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1078
1079 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1080                                                           int max_page_list_len)
1081 {
1082         struct ib_fast_reg_page_list *page_list;
1083
1084         if (!device->alloc_fast_reg_page_list)
1085                 return ERR_PTR(-ENOSYS);
1086
1087         page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1088
1089         if (!IS_ERR(page_list)) {
1090                 page_list->device = device;
1091                 page_list->max_page_list_len = max_page_list_len;
1092         }
1093
1094         return page_list;
1095 }
1096 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1097
1098 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1099 {
1100         page_list->device->free_fast_reg_page_list(page_list);
1101 }
1102 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1103
1104 /* Memory windows */
1105
1106 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1107 {
1108         struct ib_mw *mw;
1109
1110         if (!pd->device->alloc_mw)
1111                 return ERR_PTR(-ENOSYS);
1112
1113         mw = pd->device->alloc_mw(pd, type);
1114         if (!IS_ERR(mw)) {
1115                 mw->device  = pd->device;
1116                 mw->pd      = pd;
1117                 mw->uobject = NULL;
1118                 mw->type    = type;
1119                 atomic_inc(&pd->usecnt);
1120         }
1121
1122         return mw;
1123 }
1124 EXPORT_SYMBOL(ib_alloc_mw);
1125
1126 int ib_dealloc_mw(struct ib_mw *mw)
1127 {
1128         struct ib_pd *pd;
1129         int ret;
1130
1131         pd = mw->pd;
1132         ret = mw->device->dealloc_mw(mw);
1133         if (!ret)
1134                 atomic_dec(&pd->usecnt);
1135
1136         return ret;
1137 }
1138 EXPORT_SYMBOL(ib_dealloc_mw);
1139
1140 /* "Fast" memory regions */
1141
1142 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1143                             int mr_access_flags,
1144                             struct ib_fmr_attr *fmr_attr)
1145 {
1146         struct ib_fmr *fmr;
1147
1148         if (!pd->device->alloc_fmr)
1149                 return ERR_PTR(-ENOSYS);
1150
1151         fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1152         if (!IS_ERR(fmr)) {
1153                 fmr->device = pd->device;
1154                 fmr->pd     = pd;
1155                 atomic_inc(&pd->usecnt);
1156         }
1157
1158         return fmr;
1159 }
1160 EXPORT_SYMBOL(ib_alloc_fmr);
1161
1162 int ib_unmap_fmr(struct list_head *fmr_list)
1163 {
1164         struct ib_fmr *fmr;
1165
1166         if (list_empty(fmr_list))
1167                 return 0;
1168
1169         fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1170         return fmr->device->unmap_fmr(fmr_list);
1171 }
1172 EXPORT_SYMBOL(ib_unmap_fmr);
1173
1174 int ib_dealloc_fmr(struct ib_fmr *fmr)
1175 {
1176         struct ib_pd *pd;
1177         int ret;
1178
1179         pd = fmr->pd;
1180         ret = fmr->device->dealloc_fmr(fmr);
1181         if (!ret)
1182                 atomic_dec(&pd->usecnt);
1183
1184         return ret;
1185 }
1186 EXPORT_SYMBOL(ib_dealloc_fmr);
1187
1188 /* Multicast groups */
1189
1190 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1191 {
1192         int ret;
1193
1194         if (!qp->device->attach_mcast)
1195                 return -ENOSYS;
1196         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1197                 return -EINVAL;
1198
1199         ret = qp->device->attach_mcast(qp, gid, lid);
1200         if (!ret)
1201                 atomic_inc(&qp->usecnt);
1202         return ret;
1203 }
1204 EXPORT_SYMBOL(ib_attach_mcast);
1205
1206 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1207 {
1208         int ret;
1209
1210         if (!qp->device->detach_mcast)
1211                 return -ENOSYS;
1212         if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1213                 return -EINVAL;
1214
1215         ret = qp->device->detach_mcast(qp, gid, lid);
1216         if (!ret)
1217                 atomic_dec(&qp->usecnt);
1218         return ret;
1219 }
1220 EXPORT_SYMBOL(ib_detach_mcast);
1221
1222 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1223 {
1224         struct ib_xrcd *xrcd;
1225
1226         if (!device->alloc_xrcd)
1227                 return ERR_PTR(-ENOSYS);
1228
1229         xrcd = device->alloc_xrcd(device, NULL, NULL);
1230         if (!IS_ERR(xrcd)) {
1231                 xrcd->device = device;
1232                 xrcd->inode = NULL;
1233                 atomic_set(&xrcd->usecnt, 0);
1234                 mutex_init(&xrcd->tgt_qp_mutex);
1235                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1236         }
1237
1238         return xrcd;
1239 }
1240 EXPORT_SYMBOL(ib_alloc_xrcd);
1241
1242 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1243 {
1244         struct ib_qp *qp;
1245         int ret;
1246
1247         if (atomic_read(&xrcd->usecnt))
1248                 return -EBUSY;
1249
1250         while (!list_empty(&xrcd->tgt_qp_list)) {
1251                 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1252                 ret = ib_destroy_qp(qp);
1253                 if (ret)
1254                         return ret;
1255         }
1256
1257         return xrcd->device->dealloc_xrcd(xrcd);
1258 }
1259 EXPORT_SYMBOL(ib_dealloc_xrcd);
1260
1261 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1262                                struct ib_flow_attr *flow_attr,
1263                                int domain)
1264 {
1265         struct ib_flow *flow_id;
1266         if (!qp->device->create_flow)
1267                 return ERR_PTR(-ENOSYS);
1268
1269         flow_id = qp->device->create_flow(qp, flow_attr, domain);
1270         if (!IS_ERR(flow_id))
1271                 atomic_inc(&qp->usecnt);
1272         return flow_id;
1273 }
1274 EXPORT_SYMBOL(ib_create_flow);
1275
1276 int ib_destroy_flow(struct ib_flow *flow_id)
1277 {
1278         int err;
1279         struct ib_qp *qp = flow_id->qp;
1280
1281         err = qp->device->destroy_flow(flow_id);
1282         if (!err)
1283                 atomic_dec(&qp->usecnt);
1284         return err;
1285 }
1286 EXPORT_SYMBOL(ib_destroy_flow);