drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/file.h>
  37 #include <linux/fs.h>
  38
  39 #include <asm/uaccess.h>
  40
  41 #include "uverbs.h"
  42
  43 static struct lock_class_key pd_lock_key;
  44 static struct lock_class_key mr_lock_key;
  45 static struct lock_class_key cq_lock_key;
  46 static struct lock_class_key qp_lock_key;
  47 static struct lock_class_key ah_lock_key;
  48 static struct lock_class_key srq_lock_key;
  49
  50 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  51         do {                                                            \
  52                 (udata)->inbuf  = (void __user *) (ibuf);               \
  53                 (udata)->outbuf = (void __user *) (obuf);               \
  54                 (udata)->inlen  = (ilen);                               \
  55                 (udata)->outlen = (olen);                               \
  56         } while (0)
  57
  58 /*
  59  * The ib_uobject locking scheme is as follows:
  60  *
  61  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  62  *   needs to be held during all idr operations.  When an object is
  63  *   looked up, a reference must be taken on the object's kref before
  64  *   dropping this lock.
  65  *
  66  * - Each object also has an rwsem.  This rwsem must be held for
  67  *   reading while an operation that uses the object is performed.
  68  *   For example, while registering an MR, the associated PD's
  69  *   uobject.mutex must be held for reading.  The rwsem must be held
  70  *   for writing while initializing or destroying an object.
  71  *
  72  * - In addition, each object has a "live" flag.  If this flag is not
  73  *   set, then lookups of the object will fail even if it is found in
  74  *   the idr.  This handles a reader that blocks and does not acquire
  75  *   the rwsem until after the object is destroyed.  The destroy
  76  *   operation will set the live flag to 0 and then drop the rwsem;
  77  *   this will allow the reader to acquire the rwsem, see that the
  78  *   live flag is 0, and then drop the rwsem and its reference to
  79  *   object.  The underlying storage will not be freed until the last
  80  *   reference to the object is dropped.
  81  */
  82
  83 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  84                       struct ib_ucontext *context, struct lock_class_key *key)
  85 {
  86         uobj->user_handle = user_handle;
  87         uobj->context     = context;
  88         kref_init(&uobj->ref);
  89         init_rwsem(&uobj->mutex);
  90         lockdep_set_class(&uobj->mutex, key);
  91         uobj->live        = 0;
  92 }
  93
  94 static void release_uobj(struct kref *kref)
  95 {
  96         kfree(container_of(kref, struct ib_uobject, ref));
  97 }
  98
  99 static void put_uobj(struct ib_uobject *uobj)
 100 {
 101         kref_put(&uobj->ref, release_uobj);
 102 }
 103
 104 static void put_uobj_read(struct ib_uobject *uobj)
 105 {
 106         up_read(&uobj->mutex);
 107         put_uobj(uobj);
 108 }
 109
 110 static void put_uobj_write(struct ib_uobject *uobj)
 111 {
 112         up_write(&uobj->mutex);
 113         put_uobj(uobj);
 114 }
 115
 116 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 117 {
 118         int ret;
 119
 120 retry:
 121         if (!idr_pre_get(idr, GFP_KERNEL))
 122                 return -ENOMEM;
 123
 124         spin_lock(&ib_uverbs_idr_lock);
 125         ret = idr_get_new(idr, uobj, &uobj->id);
 126         spin_unlock(&ib_uverbs_idr_lock);
 127
 128         if (ret == -EAGAIN)
 129                 goto retry;
 130
 131         return ret;
 132 }
 133
 134 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 135 {
 136         spin_lock(&ib_uverbs_idr_lock);
 137         idr_remove(idr, uobj->id);
 138         spin_unlock(&ib_uverbs_idr_lock);
 139 }
 140
 141 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 142                                          struct ib_ucontext *context)
 143 {
 144         struct ib_uobject *uobj;
 145
 146         spin_lock(&ib_uverbs_idr_lock);
 147         uobj = idr_find(idr, id);
 148         if (uobj) {
 149                 if (uobj->context == context)
 150                         kref_get(&uobj->ref);
 151                 else
 152                         uobj = NULL;
 153         }
 154         spin_unlock(&ib_uverbs_idr_lock);
 155
 156         return uobj;
 157 }
 158
 159 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 160                                         struct ib_ucontext *context, int nested)
 161 {
 162         struct ib_uobject *uobj;
 163
 164         uobj = __idr_get_uobj(idr, id, context);
 165         if (!uobj)
 166                 return NULL;
 167
 168         if (nested)
 169                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 170         else
 171                 down_read(&uobj->mutex);
 172         if (!uobj->live) {
 173                 put_uobj_read(uobj);
 174                 return NULL;
 175         }
 176
 177         return uobj;
 178 }
 179
 180 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 181                                          struct ib_ucontext *context)
 182 {
 183         struct ib_uobject *uobj;
 184
 185         uobj = __idr_get_uobj(idr, id, context);
 186         if (!uobj)
 187                 return NULL;
 188
 189         down_write(&uobj->mutex);
 190         if (!uobj->live) {
 191                 put_uobj_write(uobj);
 192                 return NULL;
 193         }
 194
 195         return uobj;
 196 }
 197
 198 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 199                           int nested)
 200 {
 201         struct ib_uobject *uobj;
 202
 203         uobj = idr_read_uobj(idr, id, context, nested);
 204         return uobj ? uobj->object : NULL;
 205 }
 206
 207 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 208 {
 209         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 210 }
 211
 212 static void put_pd_read(struct ib_pd *pd)
 213 {
 214         put_uobj_read(pd->uobject);
 215 }
 216
 217 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 218 {
 219         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 220 }
 221
 222 static void put_cq_read(struct ib_cq *cq)
 223 {
 224         put_uobj_read(cq->uobject);
 225 }
 226
 227 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 228 {
 229         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 230 }
 231
 232 static void put_ah_read(struct ib_ah *ah)
 233 {
 234         put_uobj_read(ah->uobject);
 235 }
 236
 237 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 238 {
 239         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 240 }
 241
 242 static void put_qp_read(struct ib_qp *qp)
 243 {
 244         put_uobj_read(qp->uobject);
 245 }
 246
 247 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 248 {
 249         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 250 }
 251
 252 static void put_srq_read(struct ib_srq *srq)
 253 {
 254         put_uobj_read(srq->uobject);
 255 }
 256
 257 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 258                               const char __user *buf,
 259                               int in_len, int out_len)
 260 {
 261         struct ib_uverbs_get_context      cmd;
 262         struct ib_uverbs_get_context_resp resp;
 263         struct ib_udata                   udata;
 264         struct ib_device                 *ibdev = file->device->ib_dev;
 265         struct ib_ucontext               *ucontext;
 266         struct file                      *filp;
 267         int ret;
 268
 269         if (out_len < sizeof resp)
 270                 return -ENOSPC;
 271
 272         if (copy_from_user(&cmd, buf, sizeof cmd))
 273                 return -EFAULT;
 274
 275         mutex_lock(&file->mutex);
 276
 277         if (file->ucontext) {
 278                 ret = -EINVAL;
 279                 goto err;
 280         }
 281
 282         INIT_UDATA(&udata, buf + sizeof cmd,
 283                    (unsigned long) cmd.response + sizeof resp,
 284                    in_len - sizeof cmd, out_len - sizeof resp);
 285
 286         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 287         if (IS_ERR(ucontext)) {
 288                 ret = PTR_ERR(file->ucontext);
 289                 goto err;
 290         }
 291
 292         ucontext->device = ibdev;
 293         INIT_LIST_HEAD(&ucontext->pd_list);
 294         INIT_LIST_HEAD(&ucontext->mr_list);
 295         INIT_LIST_HEAD(&ucontext->mw_list);
 296         INIT_LIST_HEAD(&ucontext->cq_list);
 297         INIT_LIST_HEAD(&ucontext->qp_list);
 298         INIT_LIST_HEAD(&ucontext->srq_list);
 299         INIT_LIST_HEAD(&ucontext->ah_list);
 300         ucontext->closing = 0;
 301
 302         resp.num_comp_vectors = file->device->num_comp_vectors;
 303
 304         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 305         if (IS_ERR(filp)) {
 306                 ret = PTR_ERR(filp);
 307                 goto err_free;
 308         }
 309
 310         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 311                          &resp, sizeof resp)) {
 312                 ret = -EFAULT;
 313                 goto err_file;
 314         }
 315
 316         file->async_file = filp->private_data;
 317
 318         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 319                               ib_uverbs_event_handler);
 320         ret = ib_register_event_handler(&file->event_handler);
 321         if (ret)
 322                 goto err_file;
 323
 324         kref_get(&file->async_file->ref);
 325         kref_get(&file->ref);
 326         file->ucontext = ucontext;
 327
 328         fd_install(resp.async_fd, filp);
 329
 330         mutex_unlock(&file->mutex);
 331
 332         return in_len;
 333
 334 err_file:
 335         put_unused_fd(resp.async_fd);
 336         fput(filp);
 337
 338 err_free:
 339         ibdev->dealloc_ucontext(ucontext);
 340
 341 err:
 342         mutex_unlock(&file->mutex);
 343         return ret;
 344 }
 345
 346 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 347                                const char __user *buf,
 348                                int in_len, int out_len)
 349 {
 350         struct ib_uverbs_query_device      cmd;
 351         struct ib_uverbs_query_device_resp resp;
 352         struct ib_device_attr              attr;
 353         int                                ret;
 354
 355         if (out_len < sizeof resp)
 356                 return -ENOSPC;
 357
 358         if (copy_from_user(&cmd, buf, sizeof cmd))
 359                 return -EFAULT;
 360
 361         ret = ib_query_device(file->device->ib_dev, &attr);
 362         if (ret)
 363                 return ret;
 364
 365         memset(&resp, 0, sizeof resp);
 366
 367         resp.fw_ver                    = attr.fw_ver;
 368         resp.node_guid                 = file->device->ib_dev->node_guid;
 369         resp.sys_image_guid            = attr.sys_image_guid;
 370         resp.max_mr_size               = attr.max_mr_size;
 371         resp.page_size_cap             = attr.page_size_cap;
 372         resp.vendor_id                 = attr.vendor_id;
 373         resp.vendor_part_id            = attr.vendor_part_id;
 374         resp.hw_ver                    = attr.hw_ver;
 375         resp.max_qp                    = attr.max_qp;
 376         resp.max_qp_wr                 = attr.max_qp_wr;
 377         resp.device_cap_flags          = attr.device_cap_flags;
 378         resp.max_sge                   = attr.max_sge;
 379         resp.max_sge_rd                = attr.max_sge_rd;
 380         resp.max_cq                    = attr.max_cq;
 381         resp.max_cqe                   = attr.max_cqe;
 382         resp.max_mr                    = attr.max_mr;
 383         resp.max_pd                    = attr.max_pd;
 384         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 385         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 386         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 387         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 388         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 389         resp.atomic_cap                = attr.atomic_cap;
 390         resp.max_ee                    = attr.max_ee;
 391         resp.max_rdd                   = attr.max_rdd;
 392         resp.max_mw                    = attr.max_mw;
 393         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 394         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 395         resp.max_mcast_grp             = attr.max_mcast_grp;
 396         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 397         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 398         resp.max_ah                    = attr.max_ah;
 399         resp.max_fmr                   = attr.max_fmr;
 400         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 401         resp.max_srq                   = attr.max_srq;
 402         resp.max_srq_wr                = attr.max_srq_wr;
 403         resp.max_srq_sge               = attr.max_srq_sge;
 404         resp.max_pkeys                 = attr.max_pkeys;
 405         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 406         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 407
 408         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 409                          &resp, sizeof resp))
 410                 return -EFAULT;
 411
 412         return in_len;
 413 }
 414
 415 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 416                              const char __user *buf,
 417                              int in_len, int out_len)
 418 {
 419         struct ib_uverbs_query_port      cmd;
 420         struct ib_uverbs_query_port_resp resp;
 421         struct ib_port_attr              attr;
 422         int                              ret;
 423
 424         if (out_len < sizeof resp)
 425                 return -ENOSPC;
 426
 427         if (copy_from_user(&cmd, buf, sizeof cmd))
 428                 return -EFAULT;
 429
 430         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 431         if (ret)
 432                 return ret;
 433
 434         memset(&resp, 0, sizeof resp);
 435
 436         resp.state           = attr.state;
 437         resp.max_mtu         = attr.max_mtu;
 438         resp.active_mtu      = attr.active_mtu;
 439         resp.gid_tbl_len     = attr.gid_tbl_len;
 440         resp.port_cap_flags  = attr.port_cap_flags;
 441         resp.max_msg_sz      = attr.max_msg_sz;
 442         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 443         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 444         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 445         resp.lid             = attr.lid;
 446         resp.sm_lid          = attr.sm_lid;
 447         resp.lmc             = attr.lmc;
 448         resp.max_vl_num      = attr.max_vl_num;
 449         resp.sm_sl           = attr.sm_sl;
 450         resp.subnet_timeout  = attr.subnet_timeout;
 451         resp.init_type_reply = attr.init_type_reply;
 452         resp.active_width    = attr.active_width;
 453         resp.active_speed    = attr.active_speed;
 454         resp.phys_state      = attr.phys_state;
 455
 456         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 457                          &resp, sizeof resp))
 458                 return -EFAULT;
 459
 460         return in_len;
 461 }
 462
 463 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 464                            const char __user *buf,
 465                            int in_len, int out_len)
 466 {
 467         struct ib_uverbs_alloc_pd      cmd;
 468         struct ib_uverbs_alloc_pd_resp resp;
 469         struct ib_udata                udata;
 470         struct ib_uobject             *uobj;
 471         struct ib_pd                  *pd;
 472         int                            ret;
 473
 474         if (out_len < sizeof resp)
 475                 return -ENOSPC;
 476
 477         if (copy_from_user(&cmd, buf, sizeof cmd))
 478                 return -EFAULT;
 479
 480         INIT_UDATA(&udata, buf + sizeof cmd,
 481                    (unsigned long) cmd.response + sizeof resp,
 482                    in_len - sizeof cmd, out_len - sizeof resp);
 483
 484         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 485         if (!uobj)
 486                 return -ENOMEM;
 487
 488         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 489         down_write(&uobj->mutex);
 490
 491         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 492                                             file->ucontext, &udata);
 493         if (IS_ERR(pd)) {
 494                 ret = PTR_ERR(pd);
 495                 goto err;
 496         }
 497
 498         pd->device  = file->device->ib_dev;
 499         pd->uobject = uobj;
 500         atomic_set(&pd->usecnt, 0);
 501
 502         uobj->object = pd;
 503         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 504         if (ret)
 505                 goto err_idr;
 506
 507         memset(&resp, 0, sizeof resp);
 508         resp.pd_handle = uobj->id;
 509
 510         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 511                          &resp, sizeof resp)) {
 512                 ret = -EFAULT;
 513                 goto err_copy;
 514         }
 515
 516         mutex_lock(&file->mutex);
 517         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 518         mutex_unlock(&file->mutex);
 519
 520         uobj->live = 1;
 521
 522         up_write(&uobj->mutex);
 523
 524         return in_len;
 525
 526 err_copy:
 527         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 528
 529 err_idr:
 530         ib_dealloc_pd(pd);
 531
 532 err:
 533         put_uobj_write(uobj);
 534         return ret;
 535 }
 536
 537 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 538                              const char __user *buf,
 539                              int in_len, int out_len)
 540 {
 541         struct ib_uverbs_dealloc_pd cmd;
 542         struct ib_uobject          *uobj;
 543         int                         ret;
 544
 545         if (copy_from_user(&cmd, buf, sizeof cmd))
 546                 return -EFAULT;
 547
 548         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 549         if (!uobj)
 550                 return -EINVAL;
 551
 552         ret = ib_dealloc_pd(uobj->object);
 553         if (!ret)
 554                 uobj->live = 0;
 555
 556         put_uobj_write(uobj);
 557
 558         if (ret)
 559                 return ret;
 560
 561         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 562
 563         mutex_lock(&file->mutex);
 564         list_del(&uobj->list);
 565         mutex_unlock(&file->mutex);
 566
 567         put_uobj(uobj);
 568
 569         return in_len;
 570 }
 571
 572 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 573                          const char __user *buf, int in_len,
 574                          int out_len)
 575 {
 576         struct ib_uverbs_reg_mr      cmd;
 577         struct ib_uverbs_reg_mr_resp resp;
 578         struct ib_udata              udata;
 579         struct ib_uobject           *uobj;
 580         struct ib_pd                *pd;
 581         struct ib_mr                *mr;
 582         int                          ret;
 583
 584         if (out_len < sizeof resp)
 585                 return -ENOSPC;
 586
 587         if (copy_from_user(&cmd, buf, sizeof cmd))
 588                 return -EFAULT;
 589
 590         INIT_UDATA(&udata, buf + sizeof cmd,
 591                    (unsigned long) cmd.response + sizeof resp,
 592                    in_len - sizeof cmd, out_len - sizeof resp);
 593
 594         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 595                 return -EINVAL;
 596
 597         /*
 598          * Local write permission is required if remote write or
 599          * remote atomic permission is also requested.
 600          */
 601         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 602             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 603                 return -EINVAL;
 604
 605         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 606         if (!uobj)
 607                 return -ENOMEM;
 608
 609         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 610         down_write(&uobj->mutex);
 611
 612         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 613         if (!pd) {
 614                 ret = -EINVAL;
 615                 goto err_free;
 616         }
 617
 618         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 619                                      cmd.access_flags, &udata);
 620         if (IS_ERR(mr)) {
 621                 ret = PTR_ERR(mr);
 622                 goto err_put;
 623         }
 624
 625         mr->device  = pd->device;
 626         mr->pd      = pd;
 627         mr->uobject = uobj;
 628         atomic_inc(&pd->usecnt);
 629         atomic_set(&mr->usecnt, 0);
 630
 631         uobj->object = mr;
 632         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 633         if (ret)
 634                 goto err_unreg;
 635
 636         memset(&resp, 0, sizeof resp);
 637         resp.lkey      = mr->lkey;
 638         resp.rkey      = mr->rkey;
 639         resp.mr_handle = uobj->id;
 640
 641         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 642                          &resp, sizeof resp)) {
 643                 ret = -EFAULT;
 644                 goto err_copy;
 645         }
 646
 647         put_pd_read(pd);
 648
 649         mutex_lock(&file->mutex);
 650         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 651         mutex_unlock(&file->mutex);
 652
 653         uobj->live = 1;
 654
 655         up_write(&uobj->mutex);
 656
 657         return in_len;
 658
 659 err_copy:
 660         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 661
 662 err_unreg:
 663         ib_dereg_mr(mr);
 664
 665 err_put:
 666         put_pd_read(pd);
 667
 668 err_free:
 669         put_uobj_write(uobj);
 670         return ret;
 671 }
 672
 673 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 674                            const char __user *buf, int in_len,
 675                            int out_len)
 676 {
 677         struct ib_uverbs_dereg_mr cmd;
 678         struct ib_mr             *mr;
 679         struct ib_uobject        *uobj;
 680         int                       ret = -EINVAL;
 681
 682         if (copy_from_user(&cmd, buf, sizeof cmd))
 683                 return -EFAULT;
 684
 685         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 686         if (!uobj)
 687                 return -EINVAL;
 688
 689         mr = uobj->object;
 690
 691         ret = ib_dereg_mr(mr);
 692         if (!ret)
 693                 uobj->live = 0;
 694
 695         put_uobj_write(uobj);
 696
 697         if (ret)
 698                 return ret;
 699
 700         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 701
 702         mutex_lock(&file->mutex);
 703         list_del(&uobj->list);
 704         mutex_unlock(&file->mutex);
 705
 706         put_uobj(uobj);
 707
 708         return in_len;
 709 }
 710
 711 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 712                                       const char __user *buf, int in_len,
 713                                       int out_len)
 714 {
 715         struct ib_uverbs_create_comp_channel       cmd;
 716         struct ib_uverbs_create_comp_channel_resp  resp;
 717         struct file                               *filp;
 718
 719         if (out_len < sizeof resp)
 720                 return -ENOSPC;
 721
 722         if (copy_from_user(&cmd, buf, sizeof cmd))
 723                 return -EFAULT;
 724
 725         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 726         if (IS_ERR(filp))
 727                 return PTR_ERR(filp);
 728
 729         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 730                          &resp, sizeof resp)) {
 731                 put_unused_fd(resp.fd);
 732                 fput(filp);
 733                 return -EFAULT;
 734         }
 735
 736         fd_install(resp.fd, filp);
 737         return in_len;
 738 }
 739
 740 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 741                             const char __user *buf, int in_len,
 742                             int out_len)
 743 {
 744         struct ib_uverbs_create_cq      cmd;
 745         struct ib_uverbs_create_cq_resp resp;
 746         struct ib_udata                 udata;
 747         struct ib_ucq_object           *obj;
 748         struct ib_uverbs_event_file    *ev_file = NULL;
 749         struct ib_cq                   *cq;
 750         int                             ret;
 751
 752         if (out_len < sizeof resp)
 753                 return -ENOSPC;
 754
 755         if (copy_from_user(&cmd, buf, sizeof cmd))
 756                 return -EFAULT;
 757
 758         INIT_UDATA(&udata, buf + sizeof cmd,
 759                    (unsigned long) cmd.response + sizeof resp,
 760                    in_len - sizeof cmd, out_len - sizeof resp);
 761
 762         if (cmd.comp_vector >= file->device->num_comp_vectors)
 763                 return -EINVAL;
 764
 765         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 766         if (!obj)
 767                 return -ENOMEM;
 768
 769         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 770         down_write(&obj->uobject.mutex);
 771
 772         if (cmd.comp_channel >= 0) {
 773                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 774                 if (!ev_file) {
 775                         ret = -EINVAL;
 776                         goto err;
 777                 }
 778         }
 779
 780         obj->uverbs_file           = file;
 781         obj->comp_events_reported  = 0;
 782         obj->async_events_reported = 0;
 783         INIT_LIST_HEAD(&obj->comp_list);
 784         INIT_LIST_HEAD(&obj->async_list);
 785
 786         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 787                                              cmd.comp_vector,
 788                                              file->ucontext, &udata);
 789         if (IS_ERR(cq)) {
 790                 ret = PTR_ERR(cq);
 791                 goto err_file;
 792         }
 793
 794         cq->device        = file->device->ib_dev;
 795         cq->uobject       = &obj->uobject;
 796         cq->comp_handler  = ib_uverbs_comp_handler;
 797         cq->event_handler = ib_uverbs_cq_event_handler;
 798         cq->cq_context    = ev_file;
 799         atomic_set(&cq->usecnt, 0);
 800
 801         obj->uobject.object = cq;
 802         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 803         if (ret)
 804                 goto err_free;
 805
 806         memset(&resp, 0, sizeof resp);
 807         resp.cq_handle = obj->uobject.id;
 808         resp.cqe       = cq->cqe;
 809
 810         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 811                          &resp, sizeof resp)) {
 812                 ret = -EFAULT;
 813                 goto err_copy;
 814         }
 815
 816         mutex_lock(&file->mutex);
 817         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 818         mutex_unlock(&file->mutex);
 819
 820         obj->uobject.live = 1;
 821
 822         up_write(&obj->uobject.mutex);
 823
 824         return in_len;
 825
 826 err_copy:
 827         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 828
 829 err_free:
 830         ib_destroy_cq(cq);
 831
 832 err_file:
 833         if (ev_file)
 834                 ib_uverbs_release_ucq(file, ev_file, obj);
 835
 836 err:
 837         put_uobj_write(&obj->uobject);
 838         return ret;
 839 }
 840
 841 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 842                             const char __user *buf, int in_len,
 843                             int out_len)
 844 {
 845         struct ib_uverbs_resize_cq      cmd;
 846         struct ib_uverbs_resize_cq_resp resp;
 847         struct ib_udata                 udata;
 848         struct ib_cq                    *cq;
 849         int                             ret = -EINVAL;
 850
 851         if (copy_from_user(&cmd, buf, sizeof cmd))
 852                 return -EFAULT;
 853
 854         INIT_UDATA(&udata, buf + sizeof cmd,
 855                    (unsigned long) cmd.response + sizeof resp,
 856                    in_len - sizeof cmd, out_len - sizeof resp);
 857
 858         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 859         if (!cq)
 860                 return -EINVAL;
 861
 862         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 863         if (ret)
 864                 goto out;
 865
 866         resp.cqe = cq->cqe;
 867
 868         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 869                          &resp, sizeof resp.cqe))
 870                 ret = -EFAULT;
 871
 872 out:
 873         put_cq_read(cq);
 874
 875         return ret ? ret : in_len;
 876 }
 877
 878 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 879                           const char __user *buf, int in_len,
 880                           int out_len)
 881 {
 882         struct ib_uverbs_poll_cq       cmd;
 883         struct ib_uverbs_poll_cq_resp *resp;
 884         struct ib_cq                  *cq;
 885         struct ib_wc                  *wc;
 886         int                            ret = 0;
 887         int                            i;
 888         int                            rsize;
 889
 890         if (copy_from_user(&cmd, buf, sizeof cmd))
 891                 return -EFAULT;
 892
 893         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 894         if (!wc)
 895                 return -ENOMEM;
 896
 897         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 898         resp = kmalloc(rsize, GFP_KERNEL);
 899         if (!resp) {
 900                 ret = -ENOMEM;
 901                 goto out_wc;
 902         }
 903
 904         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 905         if (!cq) {
 906                 ret = -EINVAL;
 907                 goto out;
 908         }
 909
 910         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 911
 912         put_cq_read(cq);
 913
 914         for (i = 0; i < resp->count; i++) {
 915                 resp->wc[i].wr_id          = wc[i].wr_id;
 916                 resp->wc[i].status         = wc[i].status;
 917                 resp->wc[i].opcode         = wc[i].opcode;
 918                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 919                 resp->wc[i].byte_len       = wc[i].byte_len;
 920                 resp->wc[i].ex.imm_data    = (__u32 __force) wc[i].ex.imm_data;
 921                 resp->wc[i].qp_num         = wc[i].qp->qp_num;
 922                 resp->wc[i].src_qp         = wc[i].src_qp;
 923                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 924                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 925                 resp->wc[i].slid           = wc[i].slid;
 926                 resp->wc[i].sl             = wc[i].sl;
 927                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 928                 resp->wc[i].port_num       = wc[i].port_num;
 929         }
 930
 931         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 932                 ret = -EFAULT;
 933
 934 out:
 935         kfree(resp);
 936
 937 out_wc:
 938         kfree(wc);
 939         return ret ? ret : in_len;
 940 }
 941
 942 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 943                                 const char __user *buf, int in_len,
 944                                 int out_len)
 945 {
 946         struct ib_uverbs_req_notify_cq cmd;
 947         struct ib_cq                  *cq;
 948
 949         if (copy_from_user(&cmd, buf, sizeof cmd))
 950                 return -EFAULT;
 951
 952         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 953         if (!cq)
 954                 return -EINVAL;
 955
 956         ib_req_notify_cq(cq, cmd.solicited_only ?
 957                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 958
 959         put_cq_read(cq);
 960
 961         return in_len;
 962 }
 963
 964 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 965                              const char __user *buf, int in_len,
 966                              int out_len)
 967 {
 968         struct ib_uverbs_destroy_cq      cmd;
 969         struct ib_uverbs_destroy_cq_resp resp;
 970         struct ib_uobject               *uobj;
 971         struct ib_cq                    *cq;
 972         struct ib_ucq_object            *obj;
 973         struct ib_uverbs_event_file     *ev_file;
 974         int                              ret = -EINVAL;
 975
 976         if (copy_from_user(&cmd, buf, sizeof cmd))
 977                 return -EFAULT;
 978
 979         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 980         if (!uobj)
 981                 return -EINVAL;
 982         cq      = uobj->object;
 983         ev_file = cq->cq_context;
 984         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
 985
 986         ret = ib_destroy_cq(cq);
 987         if (!ret)
 988                 uobj->live = 0;
 989
 990         put_uobj_write(uobj);
 991
 992         if (ret)
 993                 return ret;
 994
 995         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
 996
 997         mutex_lock(&file->mutex);
 998         list_del(&uobj->list);
 999         mutex_unlock(&file->mutex);
1000
1001         ib_uverbs_release_ucq(file, ev_file, obj);
1002
1003         memset(&resp, 0, sizeof resp);
1004         resp.comp_events_reported  = obj->comp_events_reported;
1005         resp.async_events_reported = obj->async_events_reported;
1006
1007         put_uobj(uobj);
1008
1009         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1010                          &resp, sizeof resp))
1011                 return -EFAULT;
1012
1013         return in_len;
1014 }
1015
1016 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1017                             const char __user *buf, int in_len,
1018                             int out_len)
1019 {
1020         struct ib_uverbs_create_qp      cmd;
1021         struct ib_uverbs_create_qp_resp resp;
1022         struct ib_udata                 udata;
1023         struct ib_uqp_object           *obj;
1024         struct ib_pd                   *pd;
1025         struct ib_cq                   *scq, *rcq;
1026         struct ib_srq                  *srq;
1027         struct ib_qp                   *qp;
1028         struct ib_qp_init_attr          attr;
1029         int ret;
1030
1031         if (out_len < sizeof resp)
1032                 return -ENOSPC;
1033
1034         if (copy_from_user(&cmd, buf, sizeof cmd))
1035                 return -EFAULT;
1036
1037         INIT_UDATA(&udata, buf + sizeof cmd,
1038                    (unsigned long) cmd.response + sizeof resp,
1039                    in_len - sizeof cmd, out_len - sizeof resp);
1040
1041         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1042         if (!obj)
1043                 return -ENOMEM;
1044
1045         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1046         down_write(&obj->uevent.uobject.mutex);
1047
1048         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1049         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1050         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1051         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1052                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1053
1054         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1055                 ret = -EINVAL;
1056                 goto err_put;
1057         }
1058
1059         attr.event_handler = ib_uverbs_qp_event_handler;
1060         attr.qp_context    = file;
1061         attr.send_cq       = scq;
1062         attr.recv_cq       = rcq;
1063         attr.srq           = srq;
1064         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1065         attr.qp_type       = cmd.qp_type;
1066         attr.create_flags  = 0;
1067
1068         attr.cap.max_send_wr     = cmd.max_send_wr;
1069         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1070         attr.cap.max_send_sge    = cmd.max_send_sge;
1071         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1072         attr.cap.max_inline_data = cmd.max_inline_data;
1073
1074         obj->uevent.events_reported     = 0;
1075         INIT_LIST_HEAD(&obj->uevent.event_list);
1076         INIT_LIST_HEAD(&obj->mcast_list);
1077
1078         qp = pd->device->create_qp(pd, &attr, &udata);
1079         if (IS_ERR(qp)) {
1080                 ret = PTR_ERR(qp);
1081                 goto err_put;
1082         }
1083
1084         qp->device        = pd->device;
1085         qp->pd            = pd;
1086         qp->send_cq       = attr.send_cq;
1087         qp->recv_cq       = attr.recv_cq;
1088         qp->srq           = attr.srq;
1089         qp->uobject       = &obj->uevent.uobject;
1090         qp->event_handler = attr.event_handler;
1091         qp->qp_context    = attr.qp_context;
1092         qp->qp_type       = attr.qp_type;
1093         atomic_inc(&pd->usecnt);
1094         atomic_inc(&attr.send_cq->usecnt);
1095         atomic_inc(&attr.recv_cq->usecnt);
1096         if (attr.srq)
1097                 atomic_inc(&attr.srq->usecnt);
1098
1099         obj->uevent.uobject.object = qp;
1100         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1101         if (ret)
1102                 goto err_destroy;
1103
1104         memset(&resp, 0, sizeof resp);
1105         resp.qpn             = qp->qp_num;
1106         resp.qp_handle       = obj->uevent.uobject.id;
1107         resp.max_recv_sge    = attr.cap.max_recv_sge;
1108         resp.max_send_sge    = attr.cap.max_send_sge;
1109         resp.max_recv_wr     = attr.cap.max_recv_wr;
1110         resp.max_send_wr     = attr.cap.max_send_wr;
1111         resp.max_inline_data = attr.cap.max_inline_data;
1112
1113         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1114                          &resp, sizeof resp)) {
1115                 ret = -EFAULT;
1116                 goto err_copy;
1117         }
1118
1119         put_pd_read(pd);
1120         put_cq_read(scq);
1121         if (rcq != scq)
1122                 put_cq_read(rcq);
1123         if (srq)
1124                 put_srq_read(srq);
1125
1126         mutex_lock(&file->mutex);
1127         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1128         mutex_unlock(&file->mutex);
1129
1130         obj->uevent.uobject.live = 1;
1131
1132         up_write(&obj->uevent.uobject.mutex);
1133
1134         return in_len;
1135
1136 err_copy:
1137         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1138
1139 err_destroy:
1140         ib_destroy_qp(qp);
1141
1142 err_put:
1143         if (pd)
1144                 put_pd_read(pd);
1145         if (scq)
1146                 put_cq_read(scq);
1147         if (rcq && rcq != scq)
1148                 put_cq_read(rcq);
1149         if (srq)
1150                 put_srq_read(srq);
1151
1152         put_uobj_write(&obj->uevent.uobject);
1153         return ret;
1154 }
1155
1156 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1157                            const char __user *buf, int in_len,
1158                            int out_len)
1159 {
1160         struct ib_uverbs_query_qp      cmd;
1161         struct ib_uverbs_query_qp_resp resp;
1162         struct ib_qp                   *qp;
1163         struct ib_qp_attr              *attr;
1164         struct ib_qp_init_attr         *init_attr;
1165         int                            ret;
1166
1167         if (copy_from_user(&cmd, buf, sizeof cmd))
1168                 return -EFAULT;
1169
1170         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1171         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1172         if (!attr || !init_attr) {
1173                 ret = -ENOMEM;
1174                 goto out;
1175         }
1176
1177         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1178         if (!qp) {
1179                 ret = -EINVAL;
1180                 goto out;
1181         }
1182
1183         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1184
1185         put_qp_read(qp);
1186
1187         if (ret)
1188                 goto out;
1189
1190         memset(&resp, 0, sizeof resp);
1191
1192         resp.qp_state               = attr->qp_state;
1193         resp.cur_qp_state           = attr->cur_qp_state;
1194         resp.path_mtu               = attr->path_mtu;
1195         resp.path_mig_state         = attr->path_mig_state;
1196         resp.qkey                   = attr->qkey;
1197         resp.rq_psn                 = attr->rq_psn;
1198         resp.sq_psn                 = attr->sq_psn;
1199         resp.dest_qp_num            = attr->dest_qp_num;
1200         resp.qp_access_flags        = attr->qp_access_flags;
1201         resp.pkey_index             = attr->pkey_index;
1202         resp.alt_pkey_index         = attr->alt_pkey_index;
1203         resp.sq_draining            = attr->sq_draining;
1204         resp.max_rd_atomic          = attr->max_rd_atomic;
1205         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1206         resp.min_rnr_timer          = attr->min_rnr_timer;
1207         resp.port_num               = attr->port_num;
1208         resp.timeout                = attr->timeout;
1209         resp.retry_cnt              = attr->retry_cnt;
1210         resp.rnr_retry              = attr->rnr_retry;
1211         resp.alt_port_num           = attr->alt_port_num;
1212         resp.alt_timeout            = attr->alt_timeout;
1213
1214         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1215         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1216         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1217         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1218         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1219         resp.dest.dlid              = attr->ah_attr.dlid;
1220         resp.dest.sl                = attr->ah_attr.sl;
1221         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1222         resp.dest.static_rate       = attr->ah_attr.static_rate;
1223         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1224         resp.dest.port_num          = attr->ah_attr.port_num;
1225
1226         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1227         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1228         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1229         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1230         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1231         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1232         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1233         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1234         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1235         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1236         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1237
1238         resp.max_send_wr            = init_attr->cap.max_send_wr;
1239         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1240         resp.max_send_sge           = init_attr->cap.max_send_sge;
1241         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1242         resp.max_inline_data        = init_attr->cap.max_inline_data;
1243         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1244
1245         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1246                          &resp, sizeof resp))
1247                 ret = -EFAULT;
1248
1249 out:
1250         kfree(attr);
1251         kfree(init_attr);
1252
1253         return ret ? ret : in_len;
1254 }
1255
1256 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1257                             const char __user *buf, int in_len,
1258                             int out_len)
1259 {
1260         struct ib_uverbs_modify_qp cmd;
1261         struct ib_udata            udata;
1262         struct ib_qp              *qp;
1263         struct ib_qp_attr         *attr;
1264         int                        ret;
1265
1266         if (copy_from_user(&cmd, buf, sizeof cmd))
1267                 return -EFAULT;
1268
1269         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1270                    out_len);
1271
1272         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1273         if (!attr)
1274                 return -ENOMEM;
1275
1276         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1277         if (!qp) {
1278                 ret = -EINVAL;
1279                 goto out;
1280         }
1281
1282         attr->qp_state            = cmd.qp_state;
1283         attr->cur_qp_state        = cmd.cur_qp_state;
1284         attr->path_mtu            = cmd.path_mtu;
1285         attr->path_mig_state      = cmd.path_mig_state;
1286         attr->qkey                = cmd.qkey;
1287         attr->rq_psn              = cmd.rq_psn;
1288         attr->sq_psn              = cmd.sq_psn;
1289         attr->dest_qp_num         = cmd.dest_qp_num;
1290         attr->qp_access_flags     = cmd.qp_access_flags;
1291         attr->pkey_index          = cmd.pkey_index;
1292         attr->alt_pkey_index      = cmd.alt_pkey_index;
1293         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1294         attr->max_rd_atomic       = cmd.max_rd_atomic;
1295         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1296         attr->min_rnr_timer       = cmd.min_rnr_timer;
1297         attr->port_num            = cmd.port_num;
1298         attr->timeout             = cmd.timeout;
1299         attr->retry_cnt           = cmd.retry_cnt;
1300         attr->rnr_retry           = cmd.rnr_retry;
1301         attr->alt_port_num        = cmd.alt_port_num;
1302         attr->alt_timeout         = cmd.alt_timeout;
1303
1304         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1305         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1306         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1307         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1308         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1309         attr->ah_attr.dlid                  = cmd.dest.dlid;
1310         attr->ah_attr.sl                    = cmd.dest.sl;
1311         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1312         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1313         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1314         attr->ah_attr.port_num              = cmd.dest.port_num;
1315
1316         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1317         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1318         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1319         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1320         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1321         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1322         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1323         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1324         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1325         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1326         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1327
1328         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1329
1330         put_qp_read(qp);
1331
1332         if (ret)
1333                 goto out;
1334
1335         ret = in_len;
1336
1337 out:
1338         kfree(attr);
1339
1340         return ret;
1341 }
1342
1343 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1344                              const char __user *buf, int in_len,
1345                              int out_len)
1346 {
1347         struct ib_uverbs_destroy_qp      cmd;
1348         struct ib_uverbs_destroy_qp_resp resp;
1349         struct ib_uobject               *uobj;
1350         struct ib_qp                    *qp;
1351         struct ib_uqp_object            *obj;
1352         int                              ret = -EINVAL;
1353
1354         if (copy_from_user(&cmd, buf, sizeof cmd))
1355                 return -EFAULT;
1356
1357         memset(&resp, 0, sizeof resp);
1358
1359         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1360         if (!uobj)
1361                 return -EINVAL;
1362         qp  = uobj->object;
1363         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1364
1365         if (!list_empty(&obj->mcast_list)) {
1366                 put_uobj_write(uobj);
1367                 return -EBUSY;
1368         }
1369
1370         ret = ib_destroy_qp(qp);
1371         if (!ret)
1372                 uobj->live = 0;
1373
1374         put_uobj_write(uobj);
1375
1376         if (ret)
1377                 return ret;
1378
1379         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1380
1381         mutex_lock(&file->mutex);
1382         list_del(&uobj->list);
1383         mutex_unlock(&file->mutex);
1384
1385         ib_uverbs_release_uevent(file, &obj->uevent);
1386
1387         resp.events_reported = obj->uevent.events_reported;
1388
1389         put_uobj(uobj);
1390
1391         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1392                          &resp, sizeof resp))
1393                 return -EFAULT;
1394
1395         return in_len;
1396 }
1397
1398 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1399                             const char __user *buf, int in_len,
1400                             int out_len)
1401 {
1402         struct ib_uverbs_post_send      cmd;
1403         struct ib_uverbs_post_send_resp resp;
1404         struct ib_uverbs_send_wr       *user_wr;
1405         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1406         struct ib_qp                   *qp;
1407         int                             i, sg_ind;
1408         int                             is_ud;
1409         ssize_t                         ret = -EINVAL;
1410
1411         if (copy_from_user(&cmd, buf, sizeof cmd))
1412                 return -EFAULT;
1413
1414         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1415             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1416                 return -EINVAL;
1417
1418         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1419                 return -EINVAL;
1420
1421         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1422         if (!user_wr)
1423                 return -ENOMEM;
1424
1425         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1426         if (!qp)
1427                 goto out;
1428
1429         is_ud = qp->qp_type == IB_QPT_UD;
1430         sg_ind = 0;
1431         last = NULL;
1432         for (i = 0; i < cmd.wr_count; ++i) {
1433                 if (copy_from_user(user_wr,
1434                                    buf + sizeof cmd + i * cmd.wqe_size,
1435                                    cmd.wqe_size)) {
1436                         ret = -EFAULT;
1437                         goto out_put;
1438                 }
1439
1440                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1441                         ret = -EINVAL;
1442                         goto out_put;
1443                 }
1444
1445                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1446                                user_wr->num_sge * sizeof (struct ib_sge),
1447                                GFP_KERNEL);
1448                 if (!next) {
1449                         ret = -ENOMEM;
1450                         goto out_put;
1451                 }
1452
1453                 if (!last)
1454                         wr = next;
1455                 else
1456                         last->next = next;
1457                 last = next;
1458
1459                 next->next       = NULL;
1460                 next->wr_id      = user_wr->wr_id;
1461                 next->num_sge    = user_wr->num_sge;
1462                 next->opcode     = user_wr->opcode;
1463                 next->send_flags = user_wr->send_flags;
1464
1465                 if (is_ud) {
1466                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1467                                                      file->ucontext);
1468                         if (!next->wr.ud.ah) {
1469                                 ret = -EINVAL;
1470                                 goto out_put;
1471                         }
1472                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1473                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1474                 } else {
1475                         switch (next->opcode) {
1476                         case IB_WR_RDMA_WRITE_WITH_IMM:
1477                                 next->ex.imm_data =
1478                                         (__be32 __force) user_wr->ex.imm_data;
1479                         case IB_WR_RDMA_WRITE:
1480                         case IB_WR_RDMA_READ:
1481                                 next->wr.rdma.remote_addr =
1482                                         user_wr->wr.rdma.remote_addr;
1483                                 next->wr.rdma.rkey        =
1484                                         user_wr->wr.rdma.rkey;
1485                                 break;
1486                         case IB_WR_SEND_WITH_IMM:
1487                                 next->ex.imm_data =
1488                                         (__be32 __force) user_wr->ex.imm_data;
1489                                 break;
1490                         case IB_WR_SEND_WITH_INV:
1491                                 next->ex.invalidate_rkey =
1492                                         user_wr->ex.invalidate_rkey;
1493                                 break;
1494                         case IB_WR_ATOMIC_CMP_AND_SWP:
1495                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1496                                 next->wr.atomic.remote_addr =
1497                                         user_wr->wr.atomic.remote_addr;
1498                                 next->wr.atomic.compare_add =
1499                                         user_wr->wr.atomic.compare_add;
1500                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1501                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1502                                 break;
1503                         default:
1504                                 break;
1505                         }
1506                 }
1507
1508                 if (next->num_sge) {
1509                         next->sg_list = (void *) next +
1510                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1511                         if (copy_from_user(next->sg_list,
1512                                            buf + sizeof cmd +
1513                                            cmd.wr_count * cmd.wqe_size +
1514                                            sg_ind * sizeof (struct ib_sge),
1515                                            next->num_sge * sizeof (struct ib_sge))) {
1516                                 ret = -EFAULT;
1517                                 goto out_put;
1518                         }
1519                         sg_ind += next->num_sge;
1520                 } else
1521                         next->sg_list = NULL;
1522         }
1523
1524         resp.bad_wr = 0;
1525         ret = qp->device->post_send(qp, wr, &bad_wr);
1526         if (ret)
1527                 for (next = wr; next; next = next->next) {
1528                         ++resp.bad_wr;
1529                         if (next == bad_wr)
1530                                 break;
1531                 }
1532
1533         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1534                          &resp, sizeof resp))
1535                 ret = -EFAULT;
1536
1537 out_put:
1538         put_qp_read(qp);
1539
1540         while (wr) {
1541                 if (is_ud && wr->wr.ud.ah)
1542                         put_ah_read(wr->wr.ud.ah);
1543                 next = wr->next;
1544                 kfree(wr);
1545                 wr = next;
1546         }
1547
1548 out:
1549         kfree(user_wr);
1550
1551         return ret ? ret : in_len;
1552 }
1553
1554 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1555                                                     int in_len,
1556                                                     u32 wr_count,
1557                                                     u32 sge_count,
1558                                                     u32 wqe_size)
1559 {
1560         struct ib_uverbs_recv_wr *user_wr;
1561         struct ib_recv_wr        *wr = NULL, *last, *next;
1562         int                       sg_ind;
1563         int                       i;
1564         int                       ret;
1565
1566         if (in_len < wqe_size * wr_count +
1567             sge_count * sizeof (struct ib_uverbs_sge))
1568                 return ERR_PTR(-EINVAL);
1569
1570         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1571                 return ERR_PTR(-EINVAL);
1572
1573         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1574         if (!user_wr)
1575                 return ERR_PTR(-ENOMEM);
1576
1577         sg_ind = 0;
1578         last = NULL;
1579         for (i = 0; i < wr_count; ++i) {
1580                 if (copy_from_user(user_wr, buf + i * wqe_size,
1581                                    wqe_size)) {
1582                         ret = -EFAULT;
1583                         goto err;
1584                 }
1585
1586                 if (user_wr->num_sge + sg_ind > sge_count) {
1587                         ret = -EINVAL;
1588                         goto err;
1589                 }
1590
1591                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1592                                user_wr->num_sge * sizeof (struct ib_sge),
1593                                GFP_KERNEL);
1594                 if (!next) {
1595                         ret = -ENOMEM;
1596                         goto err;
1597                 }
1598
1599                 if (!last)
1600                         wr = next;
1601                 else
1602                         last->next = next;
1603                 last = next;
1604
1605                 next->next       = NULL;
1606                 next->wr_id      = user_wr->wr_id;
1607                 next->num_sge    = user_wr->num_sge;
1608
1609                 if (next->num_sge) {
1610                         next->sg_list = (void *) next +
1611                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1612                         if (copy_from_user(next->sg_list,
1613                                            buf + wr_count * wqe_size +
1614                                            sg_ind * sizeof (struct ib_sge),
1615                                            next->num_sge * sizeof (struct ib_sge))) {
1616                                 ret = -EFAULT;
1617                                 goto err;
1618                         }
1619                         sg_ind += next->num_sge;
1620                 } else
1621                         next->sg_list = NULL;
1622         }
1623
1624         kfree(user_wr);
1625         return wr;
1626
1627 err:
1628         kfree(user_wr);
1629
1630         while (wr) {
1631                 next = wr->next;
1632                 kfree(wr);
1633                 wr = next;
1634         }
1635
1636         return ERR_PTR(ret);
1637 }
1638
1639 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1640                             const char __user *buf, int in_len,
1641                             int out_len)
1642 {
1643         struct ib_uverbs_post_recv      cmd;
1644         struct ib_uverbs_post_recv_resp resp;
1645         struct ib_recv_wr              *wr, *next, *bad_wr;
1646         struct ib_qp                   *qp;
1647         ssize_t                         ret = -EINVAL;
1648
1649         if (copy_from_user(&cmd, buf, sizeof cmd))
1650                 return -EFAULT;
1651
1652         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1653                                        in_len - sizeof cmd, cmd.wr_count,
1654                                        cmd.sge_count, cmd.wqe_size);
1655         if (IS_ERR(wr))
1656                 return PTR_ERR(wr);
1657
1658         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1659         if (!qp)
1660                 goto out;
1661
1662         resp.bad_wr = 0;
1663         ret = qp->device->post_recv(qp, wr, &bad_wr);
1664
1665         put_qp_read(qp);
1666
1667         if (ret)
1668                 for (next = wr; next; next = next->next) {
1669                         ++resp.bad_wr;
1670                         if (next == bad_wr)
1671                                 break;
1672                 }
1673
1674         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1675                          &resp, sizeof resp))
1676                 ret = -EFAULT;
1677
1678 out:
1679         while (wr) {
1680                 next = wr->next;
1681                 kfree(wr);
1682                 wr = next;
1683         }
1684
1685         return ret ? ret : in_len;
1686 }
1687
1688 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1689                                 const char __user *buf, int in_len,
1690                                 int out_len)
1691 {
1692         struct ib_uverbs_post_srq_recv      cmd;
1693         struct ib_uverbs_post_srq_recv_resp resp;
1694         struct ib_recv_wr                  *wr, *next, *bad_wr;
1695         struct ib_srq                      *srq;
1696         ssize_t                             ret = -EINVAL;
1697
1698         if (copy_from_user(&cmd, buf, sizeof cmd))
1699                 return -EFAULT;
1700
1701         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1702                                        in_len - sizeof cmd, cmd.wr_count,
1703                                        cmd.sge_count, cmd.wqe_size);
1704         if (IS_ERR(wr))
1705                 return PTR_ERR(wr);
1706
1707         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1708         if (!srq)
1709                 goto out;
1710
1711         resp.bad_wr = 0;
1712         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1713
1714         put_srq_read(srq);
1715
1716         if (ret)
1717                 for (next = wr; next; next = next->next) {
1718                         ++resp.bad_wr;
1719                         if (next == bad_wr)
1720                                 break;
1721                 }
1722
1723         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1724                          &resp, sizeof resp))
1725                 ret = -EFAULT;
1726
1727 out:
1728         while (wr) {
1729                 next = wr->next;
1730                 kfree(wr);
1731                 wr = next;
1732         }
1733
1734         return ret ? ret : in_len;
1735 }
1736
1737 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1738                             const char __user *buf, int in_len,
1739                             int out_len)
1740 {
1741         struct ib_uverbs_create_ah       cmd;
1742         struct ib_uverbs_create_ah_resp  resp;
1743         struct ib_uobject               *uobj;
1744         struct ib_pd                    *pd;
1745         struct ib_ah                    *ah;
1746         struct ib_ah_attr               attr;
1747         int ret;
1748
1749         if (out_len < sizeof resp)
1750                 return -ENOSPC;
1751
1752         if (copy_from_user(&cmd, buf, sizeof cmd))
1753                 return -EFAULT;
1754
1755         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1756         if (!uobj)
1757                 return -ENOMEM;
1758
1759         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1760         down_write(&uobj->mutex);
1761
1762         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1763         if (!pd) {
1764                 ret = -EINVAL;
1765                 goto err;
1766         }
1767
1768         attr.dlid              = cmd.attr.dlid;
1769         attr.sl                = cmd.attr.sl;
1770         attr.src_path_bits     = cmd.attr.src_path_bits;
1771         attr.static_rate       = cmd.attr.static_rate;
1772         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1773         attr.port_num          = cmd.attr.port_num;
1774         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1775         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1776         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1777         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1778         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1779
1780         ah = ib_create_ah(pd, &attr);
1781         if (IS_ERR(ah)) {
1782                 ret = PTR_ERR(ah);
1783                 goto err_put;
1784         }
1785
1786         ah->uobject  = uobj;
1787         uobj->object = ah;
1788
1789         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1790         if (ret)
1791                 goto err_destroy;
1792
1793         resp.ah_handle = uobj->id;
1794
1795         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1796                          &resp, sizeof resp)) {
1797                 ret = -EFAULT;
1798                 goto err_copy;
1799         }
1800
1801         put_pd_read(pd);
1802
1803         mutex_lock(&file->mutex);
1804         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1805         mutex_unlock(&file->mutex);
1806
1807         uobj->live = 1;
1808
1809         up_write(&uobj->mutex);
1810
1811         return in_len;
1812
1813 err_copy:
1814         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1815
1816 err_destroy:
1817         ib_destroy_ah(ah);
1818
1819 err_put:
1820         put_pd_read(pd);
1821
1822 err:
1823         put_uobj_write(uobj);
1824         return ret;
1825 }
1826
1827 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1828                              const char __user *buf, int in_len, int out_len)
1829 {
1830         struct ib_uverbs_destroy_ah cmd;
1831         struct ib_ah               *ah;
1832         struct ib_uobject          *uobj;
1833         int                         ret;
1834
1835         if (copy_from_user(&cmd, buf, sizeof cmd))
1836                 return -EFAULT;
1837
1838         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1839         if (!uobj)
1840                 return -EINVAL;
1841         ah = uobj->object;
1842
1843         ret = ib_destroy_ah(ah);
1844         if (!ret)
1845                 uobj->live = 0;
1846
1847         put_uobj_write(uobj);
1848
1849         if (ret)
1850                 return ret;
1851
1852         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1853
1854         mutex_lock(&file->mutex);
1855         list_del(&uobj->list);
1856         mutex_unlock(&file->mutex);
1857
1858         put_uobj(uobj);
1859
1860         return in_len;
1861 }
1862
1863 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1864                                const char __user *buf, int in_len,
1865                                int out_len)
1866 {
1867         struct ib_uverbs_attach_mcast cmd;
1868         struct ib_qp                 *qp;
1869         struct ib_uqp_object         *obj;
1870         struct ib_uverbs_mcast_entry *mcast;
1871         int                           ret;
1872
1873         if (copy_from_user(&cmd, buf, sizeof cmd))
1874                 return -EFAULT;
1875
1876         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1877         if (!qp)
1878                 return -EINVAL;
1879
1880         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1881
1882         list_for_each_entry(mcast, &obj->mcast_list, list)
1883                 if (cmd.mlid == mcast->lid &&
1884                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1885                         ret = 0;
1886                         goto out_put;
1887                 }
1888
1889         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1890         if (!mcast) {
1891                 ret = -ENOMEM;
1892                 goto out_put;
1893         }
1894
1895         mcast->lid = cmd.mlid;
1896         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1897
1898         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1899         if (!ret)
1900                 list_add_tail(&mcast->list, &obj->mcast_list);
1901         else
1902                 kfree(mcast);
1903
1904 out_put:
1905         put_qp_read(qp);
1906
1907         return ret ? ret : in_len;
1908 }
1909
1910 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1911                                const char __user *buf, int in_len,
1912                                int out_len)
1913 {
1914         struct ib_uverbs_detach_mcast cmd;
1915         struct ib_uqp_object         *obj;
1916         struct ib_qp                 *qp;
1917         struct ib_uverbs_mcast_entry *mcast;
1918         int                           ret = -EINVAL;
1919
1920         if (copy_from_user(&cmd, buf, sizeof cmd))
1921                 return -EFAULT;
1922
1923         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1924         if (!qp)
1925                 return -EINVAL;
1926
1927         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1928         if (ret)
1929                 goto out_put;
1930
1931         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1932
1933         list_for_each_entry(mcast, &obj->mcast_list, list)
1934                 if (cmd.mlid == mcast->lid &&
1935                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1936                         list_del(&mcast->list);
1937                         kfree(mcast);
1938                         break;
1939                 }
1940
1941 out_put:
1942         put_qp_read(qp);
1943
1944         return ret ? ret : in_len;
1945 }
1946
1947 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1948                              const char __user *buf, int in_len,
1949                              int out_len)
1950 {
1951         struct ib_uverbs_create_srq      cmd;
1952         struct ib_uverbs_create_srq_resp resp;
1953         struct ib_udata                  udata;
1954         struct ib_uevent_object         *obj;
1955         struct ib_pd                    *pd;
1956         struct ib_srq                   *srq;
1957         struct ib_srq_init_attr          attr;
1958         int ret;
1959
1960         if (out_len < sizeof resp)
1961                 return -ENOSPC;
1962
1963         if (copy_from_user(&cmd, buf, sizeof cmd))
1964                 return -EFAULT;
1965
1966         INIT_UDATA(&udata, buf + sizeof cmd,
1967                    (unsigned long) cmd.response + sizeof resp,
1968                    in_len - sizeof cmd, out_len - sizeof resp);
1969
1970         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1971         if (!obj)
1972                 return -ENOMEM;
1973
1974         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1975         down_write(&obj->uobject.mutex);
1976
1977         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1978         if (!pd) {
1979                 ret = -EINVAL;
1980                 goto err;
1981         }
1982
1983         attr.event_handler  = ib_uverbs_srq_event_handler;
1984         attr.srq_context    = file;
1985         attr.attr.max_wr    = cmd.max_wr;
1986         attr.attr.max_sge   = cmd.max_sge;
1987         attr.attr.srq_limit = cmd.srq_limit;
1988
1989         obj->events_reported     = 0;
1990         INIT_LIST_HEAD(&obj->event_list);
1991
1992         srq = pd->device->create_srq(pd, &attr, &udata);
1993         if (IS_ERR(srq)) {
1994                 ret = PTR_ERR(srq);
1995                 goto err_put;
1996         }
1997
1998         srq->device        = pd->device;
1999         srq->pd            = pd;
2000         srq->uobject       = &obj->uobject;
2001         srq->event_handler = attr.event_handler;
2002         srq->srq_context   = attr.srq_context;
2003         atomic_inc(&pd->usecnt);
2004         atomic_set(&srq->usecnt, 0);
2005
2006         obj->uobject.object = srq;
2007         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2008         if (ret)
2009                 goto err_destroy;
2010
2011         memset(&resp, 0, sizeof resp);
2012         resp.srq_handle = obj->uobject.id;
2013         resp.max_wr     = attr.attr.max_wr;
2014         resp.max_sge    = attr.attr.max_sge;
2015
2016         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2017                          &resp, sizeof resp)) {
2018                 ret = -EFAULT;
2019                 goto err_copy;
2020         }
2021
2022         put_pd_read(pd);
2023
2024         mutex_lock(&file->mutex);
2025         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2026         mutex_unlock(&file->mutex);
2027
2028         obj->uobject.live = 1;
2029
2030         up_write(&obj->uobject.mutex);
2031
2032         return in_len;
2033
2034 err_copy:
2035         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2036
2037 err_destroy:
2038         ib_destroy_srq(srq);
2039
2040 err_put:
2041         put_pd_read(pd);
2042
2043 err:
2044         put_uobj_write(&obj->uobject);
2045         return ret;
2046 }
2047
2048 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2049                              const char __user *buf, int in_len,
2050                              int out_len)
2051 {
2052         struct ib_uverbs_modify_srq cmd;
2053         struct ib_udata             udata;
2054         struct ib_srq              *srq;
2055         struct ib_srq_attr          attr;
2056         int                         ret;
2057
2058         if (copy_from_user(&cmd, buf, sizeof cmd))
2059                 return -EFAULT;
2060
2061         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2062                    out_len);
2063
2064         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2065         if (!srq)
2066                 return -EINVAL;
2067
2068         attr.max_wr    = cmd.max_wr;
2069         attr.srq_limit = cmd.srq_limit;
2070
2071         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2072
2073         put_srq_read(srq);
2074
2075         return ret ? ret : in_len;
2076 }
2077
2078 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2079                             const char __user *buf,
2080                             int in_len, int out_len)
2081 {
2082         struct ib_uverbs_query_srq      cmd;
2083         struct ib_uverbs_query_srq_resp resp;
2084         struct ib_srq_attr              attr;
2085         struct ib_srq                   *srq;
2086         int                             ret;
2087
2088         if (out_len < sizeof resp)
2089                 return -ENOSPC;
2090
2091         if (copy_from_user(&cmd, buf, sizeof cmd))
2092                 return -EFAULT;
2093
2094         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2095         if (!srq)
2096                 return -EINVAL;
2097
2098         ret = ib_query_srq(srq, &attr);
2099
2100         put_srq_read(srq);
2101
2102         if (ret)
2103                 return ret;
2104
2105         memset(&resp, 0, sizeof resp);
2106
2107         resp.max_wr    = attr.max_wr;
2108         resp.max_sge   = attr.max_sge;
2109         resp.srq_limit = attr.srq_limit;
2110
2111         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2112                          &resp, sizeof resp))
2113                 return -EFAULT;
2114
2115         return in_len;
2116 }
2117
2118 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2119                               const char __user *buf, int in_len,
2120                               int out_len)
2121 {
2122         struct ib_uverbs_destroy_srq      cmd;
2123         struct ib_uverbs_destroy_srq_resp resp;
2124         struct ib_uobject                *uobj;
2125         struct ib_srq                    *srq;
2126         struct ib_uevent_object          *obj;
2127         int                               ret = -EINVAL;
2128
2129         if (copy_from_user(&cmd, buf, sizeof cmd))
2130                 return -EFAULT;
2131
2132         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2133         if (!uobj)
2134                 return -EINVAL;
2135         srq = uobj->object;
2136         obj = container_of(uobj, struct ib_uevent_object, uobject);
2137
2138         ret = ib_destroy_srq(srq);
2139         if (!ret)
2140                 uobj->live = 0;
2141
2142         put_uobj_write(uobj);
2143
2144         if (ret)
2145                 return ret;
2146
2147         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2148
2149         mutex_lock(&file->mutex);
2150         list_del(&uobj->list);
2151         mutex_unlock(&file->mutex);
2152
2153         ib_uverbs_release_uevent(file, obj);
2154
2155         memset(&resp, 0, sizeof resp);
2156         resp.events_reported = obj->events_reported;
2157
2158         put_uobj(uobj);
2159
2160         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2161                          &resp, sizeof resp))
2162                 ret = -EFAULT;
2163
2164         return ret ? ret : in_len;
2165 }