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(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         ret = get_unused_fd();
 305         if (ret < 0)
 306                 goto err_free;
 307         resp.async_fd = ret;
 308
 309         filp = ib_uverbs_alloc_event_file(file, 1);
 310         if (IS_ERR(filp)) {
 311                 ret = PTR_ERR(filp);
 312                 goto err_fd;
 313         }
 314
 315         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 316                          &resp, sizeof resp)) {
 317                 ret = -EFAULT;
 318                 goto err_file;
 319         }
 320
 321         file->async_file = filp->private_data;
 322
 323         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 324                               ib_uverbs_event_handler);
 325         ret = ib_register_event_handler(&file->event_handler);
 326         if (ret)
 327                 goto err_file;
 328
 329         kref_get(&file->async_file->ref);
 330         kref_get(&file->ref);
 331         file->ucontext = ucontext;
 332
 333         fd_install(resp.async_fd, filp);
 334
 335         mutex_unlock(&file->mutex);
 336
 337         return in_len;
 338
 339 err_file:
 340         fput(filp);
 341
 342 err_fd:
 343         put_unused_fd(resp.async_fd);
 344
 345 err_free:
 346         ibdev->dealloc_ucontext(ucontext);
 347
 348 err:
 349         mutex_unlock(&file->mutex);
 350         return ret;
 351 }
 352
 353 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 354                                const char __user *buf,
 355                                int in_len, int out_len)
 356 {
 357         struct ib_uverbs_query_device      cmd;
 358         struct ib_uverbs_query_device_resp resp;
 359         struct ib_device_attr              attr;
 360         int                                ret;
 361
 362         if (out_len < sizeof resp)
 363                 return -ENOSPC;
 364
 365         if (copy_from_user(&cmd, buf, sizeof cmd))
 366                 return -EFAULT;
 367
 368         ret = ib_query_device(file->device->ib_dev, &attr);
 369         if (ret)
 370                 return ret;
 371
 372         memset(&resp, 0, sizeof resp);
 373
 374         resp.fw_ver                    = attr.fw_ver;
 375         resp.node_guid                 = file->device->ib_dev->node_guid;
 376         resp.sys_image_guid            = attr.sys_image_guid;
 377         resp.max_mr_size               = attr.max_mr_size;
 378         resp.page_size_cap             = attr.page_size_cap;
 379         resp.vendor_id                 = attr.vendor_id;
 380         resp.vendor_part_id            = attr.vendor_part_id;
 381         resp.hw_ver                    = attr.hw_ver;
 382         resp.max_qp                    = attr.max_qp;
 383         resp.max_qp_wr                 = attr.max_qp_wr;
 384         resp.device_cap_flags          = attr.device_cap_flags;
 385         resp.max_sge                   = attr.max_sge;
 386         resp.max_sge_rd                = attr.max_sge_rd;
 387         resp.max_cq                    = attr.max_cq;
 388         resp.max_cqe                   = attr.max_cqe;
 389         resp.max_mr                    = attr.max_mr;
 390         resp.max_pd                    = attr.max_pd;
 391         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 392         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 393         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 394         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 395         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 396         resp.atomic_cap                = attr.atomic_cap;
 397         resp.max_ee                    = attr.max_ee;
 398         resp.max_rdd                   = attr.max_rdd;
 399         resp.max_mw                    = attr.max_mw;
 400         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 401         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 402         resp.max_mcast_grp             = attr.max_mcast_grp;
 403         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 404         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 405         resp.max_ah                    = attr.max_ah;
 406         resp.max_fmr                   = attr.max_fmr;
 407         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 408         resp.max_srq                   = attr.max_srq;
 409         resp.max_srq_wr                = attr.max_srq_wr;
 410         resp.max_srq_sge               = attr.max_srq_sge;
 411         resp.max_pkeys                 = attr.max_pkeys;
 412         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 413         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 414
 415         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 416                          &resp, sizeof resp))
 417                 return -EFAULT;
 418
 419         return in_len;
 420 }
 421
 422 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 423                              const char __user *buf,
 424                              int in_len, int out_len)
 425 {
 426         struct ib_uverbs_query_port      cmd;
 427         struct ib_uverbs_query_port_resp resp;
 428         struct ib_port_attr              attr;
 429         int                              ret;
 430
 431         if (out_len < sizeof resp)
 432                 return -ENOSPC;
 433
 434         if (copy_from_user(&cmd, buf, sizeof cmd))
 435                 return -EFAULT;
 436
 437         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 438         if (ret)
 439                 return ret;
 440
 441         memset(&resp, 0, sizeof resp);
 442
 443         resp.state           = attr.state;
 444         resp.max_mtu         = attr.max_mtu;
 445         resp.active_mtu      = attr.active_mtu;
 446         resp.gid_tbl_len     = attr.gid_tbl_len;
 447         resp.port_cap_flags  = attr.port_cap_flags;
 448         resp.max_msg_sz      = attr.max_msg_sz;
 449         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 450         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 451         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 452         resp.lid             = attr.lid;
 453         resp.sm_lid          = attr.sm_lid;
 454         resp.lmc             = attr.lmc;
 455         resp.max_vl_num      = attr.max_vl_num;
 456         resp.sm_sl           = attr.sm_sl;
 457         resp.subnet_timeout  = attr.subnet_timeout;
 458         resp.init_type_reply = attr.init_type_reply;
 459         resp.active_width    = attr.active_width;
 460         resp.active_speed    = attr.active_speed;
 461         resp.phys_state      = attr.phys_state;
 462
 463         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 464                          &resp, sizeof resp))
 465                 return -EFAULT;
 466
 467         return in_len;
 468 }
 469
 470 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 471                            const char __user *buf,
 472                            int in_len, int out_len)
 473 {
 474         struct ib_uverbs_alloc_pd      cmd;
 475         struct ib_uverbs_alloc_pd_resp resp;
 476         struct ib_udata                udata;
 477         struct ib_uobject             *uobj;
 478         struct ib_pd                  *pd;
 479         int                            ret;
 480
 481         if (out_len < sizeof resp)
 482                 return -ENOSPC;
 483
 484         if (copy_from_user(&cmd, buf, sizeof cmd))
 485                 return -EFAULT;
 486
 487         INIT_UDATA(&udata, buf + sizeof cmd,
 488                    (unsigned long) cmd.response + sizeof resp,
 489                    in_len - sizeof cmd, out_len - sizeof resp);
 490
 491         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 492         if (!uobj)
 493                 return -ENOMEM;
 494
 495         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 496         down_write(&uobj->mutex);
 497
 498         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 499                                             file->ucontext, &udata);
 500         if (IS_ERR(pd)) {
 501                 ret = PTR_ERR(pd);
 502                 goto err;
 503         }
 504
 505         pd->device  = file->device->ib_dev;
 506         pd->uobject = uobj;
 507         atomic_set(&pd->usecnt, 0);
 508
 509         uobj->object = pd;
 510         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 511         if (ret)
 512                 goto err_idr;
 513
 514         memset(&resp, 0, sizeof resp);
 515         resp.pd_handle = uobj->id;
 516
 517         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 518                          &resp, sizeof resp)) {
 519                 ret = -EFAULT;
 520                 goto err_copy;
 521         }
 522
 523         mutex_lock(&file->mutex);
 524         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 525         mutex_unlock(&file->mutex);
 526
 527         uobj->live = 1;
 528
 529         up_write(&uobj->mutex);
 530
 531         return in_len;
 532
 533 err_copy:
 534         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 535
 536 err_idr:
 537         ib_dealloc_pd(pd);
 538
 539 err:
 540         put_uobj_write(uobj);
 541         return ret;
 542 }
 543
 544 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 545                              const char __user *buf,
 546                              int in_len, int out_len)
 547 {
 548         struct ib_uverbs_dealloc_pd cmd;
 549         struct ib_uobject          *uobj;
 550         int                         ret;
 551
 552         if (copy_from_user(&cmd, buf, sizeof cmd))
 553                 return -EFAULT;
 554
 555         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 556         if (!uobj)
 557                 return -EINVAL;
 558
 559         ret = ib_dealloc_pd(uobj->object);
 560         if (!ret)
 561                 uobj->live = 0;
 562
 563         put_uobj_write(uobj);
 564
 565         if (ret)
 566                 return ret;
 567
 568         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 569
 570         mutex_lock(&file->mutex);
 571         list_del(&uobj->list);
 572         mutex_unlock(&file->mutex);
 573
 574         put_uobj(uobj);
 575
 576         return in_len;
 577 }
 578
 579 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 580                          const char __user *buf, int in_len,
 581                          int out_len)
 582 {
 583         struct ib_uverbs_reg_mr      cmd;
 584         struct ib_uverbs_reg_mr_resp resp;
 585         struct ib_udata              udata;
 586         struct ib_uobject           *uobj;
 587         struct ib_pd                *pd;
 588         struct ib_mr                *mr;
 589         int                          ret;
 590
 591         if (out_len < sizeof resp)
 592                 return -ENOSPC;
 593
 594         if (copy_from_user(&cmd, buf, sizeof cmd))
 595                 return -EFAULT;
 596
 597         INIT_UDATA(&udata, buf + sizeof cmd,
 598                    (unsigned long) cmd.response + sizeof resp,
 599                    in_len - sizeof cmd, out_len - sizeof resp);
 600
 601         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 602                 return -EINVAL;
 603
 604         /*
 605          * Local write permission is required if remote write or
 606          * remote atomic permission is also requested.
 607          */
 608         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 609             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 610                 return -EINVAL;
 611
 612         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 613         if (!uobj)
 614                 return -ENOMEM;
 615
 616         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 617         down_write(&uobj->mutex);
 618
 619         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 620         if (!pd) {
 621                 ret = -EINVAL;
 622                 goto err_free;
 623         }
 624
 625         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 626                                      cmd.access_flags, &udata);
 627         if (IS_ERR(mr)) {
 628                 ret = PTR_ERR(mr);
 629                 goto err_put;
 630         }
 631
 632         mr->device  = pd->device;
 633         mr->pd      = pd;
 634         mr->uobject = uobj;
 635         atomic_inc(&pd->usecnt);
 636         atomic_set(&mr->usecnt, 0);
 637
 638         uobj->object = mr;
 639         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 640         if (ret)
 641                 goto err_unreg;
 642
 643         memset(&resp, 0, sizeof resp);
 644         resp.lkey      = mr->lkey;
 645         resp.rkey      = mr->rkey;
 646         resp.mr_handle = uobj->id;
 647
 648         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 649                          &resp, sizeof resp)) {
 650                 ret = -EFAULT;
 651                 goto err_copy;
 652         }
 653
 654         put_pd_read(pd);
 655
 656         mutex_lock(&file->mutex);
 657         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 658         mutex_unlock(&file->mutex);
 659
 660         uobj->live = 1;
 661
 662         up_write(&uobj->mutex);
 663
 664         return in_len;
 665
 666 err_copy:
 667         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 668
 669 err_unreg:
 670         ib_dereg_mr(mr);
 671
 672 err_put:
 673         put_pd_read(pd);
 674
 675 err_free:
 676         put_uobj_write(uobj);
 677         return ret;
 678 }
 679
 680 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 681                            const char __user *buf, int in_len,
 682                            int out_len)
 683 {
 684         struct ib_uverbs_dereg_mr cmd;
 685         struct ib_mr             *mr;
 686         struct ib_uobject        *uobj;
 687         int                       ret = -EINVAL;
 688
 689         if (copy_from_user(&cmd, buf, sizeof cmd))
 690                 return -EFAULT;
 691
 692         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 693         if (!uobj)
 694                 return -EINVAL;
 695
 696         mr = uobj->object;
 697
 698         ret = ib_dereg_mr(mr);
 699         if (!ret)
 700                 uobj->live = 0;
 701
 702         put_uobj_write(uobj);
 703
 704         if (ret)
 705                 return ret;
 706
 707         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 708
 709         mutex_lock(&file->mutex);
 710         list_del(&uobj->list);
 711         mutex_unlock(&file->mutex);
 712
 713         put_uobj(uobj);
 714
 715         return in_len;
 716 }
 717
 718 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 719                                       const char __user *buf, int in_len,
 720                                       int out_len)
 721 {
 722         struct ib_uverbs_create_comp_channel       cmd;
 723         struct ib_uverbs_create_comp_channel_resp  resp;
 724         struct file                               *filp;
 725         int ret;
 726
 727         if (out_len < sizeof resp)
 728                 return -ENOSPC;
 729
 730         if (copy_from_user(&cmd, buf, sizeof cmd))
 731                 return -EFAULT;
 732
 733         ret = get_unused_fd();
 734         if (ret < 0)
 735                 return ret;
 736         resp.fd = ret;
 737
 738         filp = ib_uverbs_alloc_event_file(file, 0);
 739         if (IS_ERR(filp)) {
 740                 put_unused_fd(resp.fd);
 741                 return PTR_ERR(filp);
 742         }
 743
 744         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 745                          &resp, sizeof resp)) {
 746                 put_unused_fd(resp.fd);
 747                 fput(filp);
 748                 return -EFAULT;
 749         }
 750
 751         fd_install(resp.fd, filp);
 752         return in_len;
 753 }
 754
 755 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 756                             const char __user *buf, int in_len,
 757                             int out_len)
 758 {
 759         struct ib_uverbs_create_cq      cmd;
 760         struct ib_uverbs_create_cq_resp resp;
 761         struct ib_udata                 udata;
 762         struct ib_ucq_object           *obj;
 763         struct ib_uverbs_event_file    *ev_file = NULL;
 764         struct ib_cq                   *cq;
 765         int                             ret;
 766
 767         if (out_len < sizeof resp)
 768                 return -ENOSPC;
 769
 770         if (copy_from_user(&cmd, buf, sizeof cmd))
 771                 return -EFAULT;
 772
 773         INIT_UDATA(&udata, buf + sizeof cmd,
 774                    (unsigned long) cmd.response + sizeof resp,
 775                    in_len - sizeof cmd, out_len - sizeof resp);
 776
 777         if (cmd.comp_vector >= file->device->num_comp_vectors)
 778                 return -EINVAL;
 779
 780         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 781         if (!obj)
 782                 return -ENOMEM;
 783
 784         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 785         down_write(&obj->uobject.mutex);
 786
 787         if (cmd.comp_channel >= 0) {
 788                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 789                 if (!ev_file) {
 790                         ret = -EINVAL;
 791                         goto err;
 792                 }
 793         }
 794
 795         obj->uverbs_file           = file;
 796         obj->comp_events_reported  = 0;
 797         obj->async_events_reported = 0;
 798         INIT_LIST_HEAD(&obj->comp_list);
 799         INIT_LIST_HEAD(&obj->async_list);
 800
 801         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 802                                              cmd.comp_vector,
 803                                              file->ucontext, &udata);
 804         if (IS_ERR(cq)) {
 805                 ret = PTR_ERR(cq);
 806                 goto err_file;
 807         }
 808
 809         cq->device        = file->device->ib_dev;
 810         cq->uobject       = &obj->uobject;
 811         cq->comp_handler  = ib_uverbs_comp_handler;
 812         cq->event_handler = ib_uverbs_cq_event_handler;
 813         cq->cq_context    = ev_file;
 814         atomic_set(&cq->usecnt, 0);
 815
 816         obj->uobject.object = cq;
 817         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 818         if (ret)
 819                 goto err_free;
 820
 821         memset(&resp, 0, sizeof resp);
 822         resp.cq_handle = obj->uobject.id;
 823         resp.cqe       = cq->cqe;
 824
 825         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 826                          &resp, sizeof resp)) {
 827                 ret = -EFAULT;
 828                 goto err_copy;
 829         }
 830
 831         mutex_lock(&file->mutex);
 832         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 833         mutex_unlock(&file->mutex);
 834
 835         obj->uobject.live = 1;
 836
 837         up_write(&obj->uobject.mutex);
 838
 839         return in_len;
 840
 841 err_copy:
 842         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 843
 844 err_free:
 845         ib_destroy_cq(cq);
 846
 847 err_file:
 848         if (ev_file)
 849                 ib_uverbs_release_ucq(file, ev_file, obj);
 850
 851 err:
 852         put_uobj_write(&obj->uobject);
 853         return ret;
 854 }
 855
 856 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 857                             const char __user *buf, int in_len,
 858                             int out_len)
 859 {
 860         struct ib_uverbs_resize_cq      cmd;
 861         struct ib_uverbs_resize_cq_resp resp;
 862         struct ib_udata                 udata;
 863         struct ib_cq                    *cq;
 864         int                             ret = -EINVAL;
 865
 866         if (copy_from_user(&cmd, buf, sizeof cmd))
 867                 return -EFAULT;
 868
 869         INIT_UDATA(&udata, buf + sizeof cmd,
 870                    (unsigned long) cmd.response + sizeof resp,
 871                    in_len - sizeof cmd, out_len - sizeof resp);
 872
 873         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 874         if (!cq)
 875                 return -EINVAL;
 876
 877         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 878         if (ret)
 879                 goto out;
 880
 881         resp.cqe = cq->cqe;
 882
 883         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 884                          &resp, sizeof resp.cqe))
 885                 ret = -EFAULT;
 886
 887 out:
 888         put_cq_read(cq);
 889
 890         return ret ? ret : in_len;
 891 }
 892
 893 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 894                           const char __user *buf, int in_len,
 895                           int out_len)
 896 {
 897         struct ib_uverbs_poll_cq       cmd;
 898         struct ib_uverbs_poll_cq_resp *resp;
 899         struct ib_cq                  *cq;
 900         struct ib_wc                  *wc;
 901         int                            ret = 0;
 902         int                            i;
 903         int                            rsize;
 904
 905         if (copy_from_user(&cmd, buf, sizeof cmd))
 906                 return -EFAULT;
 907
 908         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 909         if (!wc)
 910                 return -ENOMEM;
 911
 912         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 913         resp = kmalloc(rsize, GFP_KERNEL);
 914         if (!resp) {
 915                 ret = -ENOMEM;
 916                 goto out_wc;
 917         }
 918
 919         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 920         if (!cq) {
 921                 ret = -EINVAL;
 922                 goto out;
 923         }
 924
 925         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 926
 927         put_cq_read(cq);
 928
 929         for (i = 0; i < resp->count; i++) {
 930                 resp->wc[i].wr_id          = wc[i].wr_id;
 931                 resp->wc[i].status         = wc[i].status;
 932                 resp->wc[i].opcode         = wc[i].opcode;
 933                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 934                 resp->wc[i].byte_len       = wc[i].byte_len;
 935                 resp->wc[i].ex.imm_data    = (__u32 __force) wc[i].ex.imm_data;
 936                 resp->wc[i].qp_num         = wc[i].qp->qp_num;
 937                 resp->wc[i].src_qp         = wc[i].src_qp;
 938                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 939                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 940                 resp->wc[i].slid           = wc[i].slid;
 941                 resp->wc[i].sl             = wc[i].sl;
 942                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 943                 resp->wc[i].port_num       = wc[i].port_num;
 944         }
 945
 946         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 947                 ret = -EFAULT;
 948
 949 out:
 950         kfree(resp);
 951
 952 out_wc:
 953         kfree(wc);
 954         return ret ? ret : in_len;
 955 }
 956
 957 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 958                                 const char __user *buf, int in_len,
 959                                 int out_len)
 960 {
 961         struct ib_uverbs_req_notify_cq cmd;
 962         struct ib_cq                  *cq;
 963
 964         if (copy_from_user(&cmd, buf, sizeof cmd))
 965                 return -EFAULT;
 966
 967         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 968         if (!cq)
 969                 return -EINVAL;
 970
 971         ib_req_notify_cq(cq, cmd.solicited_only ?
 972                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 973
 974         put_cq_read(cq);
 975
 976         return in_len;
 977 }
 978
 979 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 980                              const char __user *buf, int in_len,
 981                              int out_len)
 982 {
 983         struct ib_uverbs_destroy_cq      cmd;
 984         struct ib_uverbs_destroy_cq_resp resp;
 985         struct ib_uobject               *uobj;
 986         struct ib_cq                    *cq;
 987         struct ib_ucq_object            *obj;
 988         struct ib_uverbs_event_file     *ev_file;
 989         int                              ret = -EINVAL;
 990
 991         if (copy_from_user(&cmd, buf, sizeof cmd))
 992                 return -EFAULT;
 993
 994         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 995         if (!uobj)
 996                 return -EINVAL;
 997         cq      = uobj->object;
 998         ev_file = cq->cq_context;
 999         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1000
1001         ret = ib_destroy_cq(cq);
1002         if (!ret)
1003                 uobj->live = 0;
1004
1005         put_uobj_write(uobj);
1006
1007         if (ret)
1008                 return ret;
1009
1010         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1011
1012         mutex_lock(&file->mutex);
1013         list_del(&uobj->list);
1014         mutex_unlock(&file->mutex);
1015
1016         ib_uverbs_release_ucq(file, ev_file, obj);
1017
1018         memset(&resp, 0, sizeof resp);
1019         resp.comp_events_reported  = obj->comp_events_reported;
1020         resp.async_events_reported = obj->async_events_reported;
1021
1022         put_uobj(uobj);
1023
1024         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1025                          &resp, sizeof resp))
1026                 return -EFAULT;
1027
1028         return in_len;
1029 }
1030
1031 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1032                             const char __user *buf, int in_len,
1033                             int out_len)
1034 {
1035         struct ib_uverbs_create_qp      cmd;
1036         struct ib_uverbs_create_qp_resp resp;
1037         struct ib_udata                 udata;
1038         struct ib_uqp_object           *obj;
1039         struct ib_pd                   *pd;
1040         struct ib_cq                   *scq, *rcq;
1041         struct ib_srq                  *srq;
1042         struct ib_qp                   *qp;
1043         struct ib_qp_init_attr          attr;
1044         int ret;
1045
1046         if (out_len < sizeof resp)
1047                 return -ENOSPC;
1048
1049         if (copy_from_user(&cmd, buf, sizeof cmd))
1050                 return -EFAULT;
1051
1052         INIT_UDATA(&udata, buf + sizeof cmd,
1053                    (unsigned long) cmd.response + sizeof resp,
1054                    in_len - sizeof cmd, out_len - sizeof resp);
1055
1056         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1057         if (!obj)
1058                 return -ENOMEM;
1059
1060         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1061         down_write(&obj->uevent.uobject.mutex);
1062
1063         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1064         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1065         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1066         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1067                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1068
1069         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1070                 ret = -EINVAL;
1071                 goto err_put;
1072         }
1073
1074         attr.event_handler = ib_uverbs_qp_event_handler;
1075         attr.qp_context    = file;
1076         attr.send_cq       = scq;
1077         attr.recv_cq       = rcq;
1078         attr.srq           = srq;
1079         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1080         attr.qp_type       = cmd.qp_type;
1081         attr.create_flags  = 0;
1082
1083         attr.cap.max_send_wr     = cmd.max_send_wr;
1084         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1085         attr.cap.max_send_sge    = cmd.max_send_sge;
1086         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1087         attr.cap.max_inline_data = cmd.max_inline_data;
1088
1089         obj->uevent.events_reported     = 0;
1090         INIT_LIST_HEAD(&obj->uevent.event_list);
1091         INIT_LIST_HEAD(&obj->mcast_list);
1092
1093         qp = pd->device->create_qp(pd, &attr, &udata);
1094         if (IS_ERR(qp)) {
1095                 ret = PTR_ERR(qp);
1096                 goto err_put;
1097         }
1098
1099         qp->device        = pd->device;
1100         qp->pd            = pd;
1101         qp->send_cq       = attr.send_cq;
1102         qp->recv_cq       = attr.recv_cq;
1103         qp->srq           = attr.srq;
1104         qp->uobject       = &obj->uevent.uobject;
1105         qp->event_handler = attr.event_handler;
1106         qp->qp_context    = attr.qp_context;
1107         qp->qp_type       = attr.qp_type;
1108         atomic_inc(&pd->usecnt);
1109         atomic_inc(&attr.send_cq->usecnt);
1110         atomic_inc(&attr.recv_cq->usecnt);
1111         if (attr.srq)
1112                 atomic_inc(&attr.srq->usecnt);
1113
1114         obj->uevent.uobject.object = qp;
1115         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1116         if (ret)
1117                 goto err_destroy;
1118
1119         memset(&resp, 0, sizeof resp);
1120         resp.qpn             = qp->qp_num;
1121         resp.qp_handle       = obj->uevent.uobject.id;
1122         resp.max_recv_sge    = attr.cap.max_recv_sge;
1123         resp.max_send_sge    = attr.cap.max_send_sge;
1124         resp.max_recv_wr     = attr.cap.max_recv_wr;
1125         resp.max_send_wr     = attr.cap.max_send_wr;
1126         resp.max_inline_data = attr.cap.max_inline_data;
1127
1128         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1129                          &resp, sizeof resp)) {
1130                 ret = -EFAULT;
1131                 goto err_copy;
1132         }
1133
1134         put_pd_read(pd);
1135         put_cq_read(scq);
1136         if (rcq != scq)
1137                 put_cq_read(rcq);
1138         if (srq)
1139                 put_srq_read(srq);
1140
1141         mutex_lock(&file->mutex);
1142         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1143         mutex_unlock(&file->mutex);
1144
1145         obj->uevent.uobject.live = 1;
1146
1147         up_write(&obj->uevent.uobject.mutex);
1148
1149         return in_len;
1150
1151 err_copy:
1152         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1153
1154 err_destroy:
1155         ib_destroy_qp(qp);
1156
1157 err_put:
1158         if (pd)
1159                 put_pd_read(pd);
1160         if (scq)
1161                 put_cq_read(scq);
1162         if (rcq && rcq != scq)
1163                 put_cq_read(rcq);
1164         if (srq)
1165                 put_srq_read(srq);
1166
1167         put_uobj_write(&obj->uevent.uobject);
1168         return ret;
1169 }
1170
1171 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1172                            const char __user *buf, int in_len,
1173                            int out_len)
1174 {
1175         struct ib_uverbs_query_qp      cmd;
1176         struct ib_uverbs_query_qp_resp resp;
1177         struct ib_qp                   *qp;
1178         struct ib_qp_attr              *attr;
1179         struct ib_qp_init_attr         *init_attr;
1180         int                            ret;
1181
1182         if (copy_from_user(&cmd, buf, sizeof cmd))
1183                 return -EFAULT;
1184
1185         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1186         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1187         if (!attr || !init_attr) {
1188                 ret = -ENOMEM;
1189                 goto out;
1190         }
1191
1192         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1193         if (!qp) {
1194                 ret = -EINVAL;
1195                 goto out;
1196         }
1197
1198         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1199
1200         put_qp_read(qp);
1201
1202         if (ret)
1203                 goto out;
1204
1205         memset(&resp, 0, sizeof resp);
1206
1207         resp.qp_state               = attr->qp_state;
1208         resp.cur_qp_state           = attr->cur_qp_state;
1209         resp.path_mtu               = attr->path_mtu;
1210         resp.path_mig_state         = attr->path_mig_state;
1211         resp.qkey                   = attr->qkey;
1212         resp.rq_psn                 = attr->rq_psn;
1213         resp.sq_psn                 = attr->sq_psn;
1214         resp.dest_qp_num            = attr->dest_qp_num;
1215         resp.qp_access_flags        = attr->qp_access_flags;
1216         resp.pkey_index             = attr->pkey_index;
1217         resp.alt_pkey_index         = attr->alt_pkey_index;
1218         resp.sq_draining            = attr->sq_draining;
1219         resp.max_rd_atomic          = attr->max_rd_atomic;
1220         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1221         resp.min_rnr_timer          = attr->min_rnr_timer;
1222         resp.port_num               = attr->port_num;
1223         resp.timeout                = attr->timeout;
1224         resp.retry_cnt              = attr->retry_cnt;
1225         resp.rnr_retry              = attr->rnr_retry;
1226         resp.alt_port_num           = attr->alt_port_num;
1227         resp.alt_timeout            = attr->alt_timeout;
1228
1229         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1230         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1231         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1232         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1233         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1234         resp.dest.dlid              = attr->ah_attr.dlid;
1235         resp.dest.sl                = attr->ah_attr.sl;
1236         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1237         resp.dest.static_rate       = attr->ah_attr.static_rate;
1238         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1239         resp.dest.port_num          = attr->ah_attr.port_num;
1240
1241         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1242         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1243         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1244         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1245         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1246         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1247         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1248         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1249         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1250         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1251         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1252
1253         resp.max_send_wr            = init_attr->cap.max_send_wr;
1254         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1255         resp.max_send_sge           = init_attr->cap.max_send_sge;
1256         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1257         resp.max_inline_data        = init_attr->cap.max_inline_data;
1258         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1259
1260         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1261                          &resp, sizeof resp))
1262                 ret = -EFAULT;
1263
1264 out:
1265         kfree(attr);
1266         kfree(init_attr);
1267
1268         return ret ? ret : in_len;
1269 }
1270
1271 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1272                             const char __user *buf, int in_len,
1273                             int out_len)
1274 {
1275         struct ib_uverbs_modify_qp cmd;
1276         struct ib_udata            udata;
1277         struct ib_qp              *qp;
1278         struct ib_qp_attr         *attr;
1279         int                        ret;
1280
1281         if (copy_from_user(&cmd, buf, sizeof cmd))
1282                 return -EFAULT;
1283
1284         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1285                    out_len);
1286
1287         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1288         if (!attr)
1289                 return -ENOMEM;
1290
1291         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1292         if (!qp) {
1293                 ret = -EINVAL;
1294                 goto out;
1295         }
1296
1297         attr->qp_state            = cmd.qp_state;
1298         attr->cur_qp_state        = cmd.cur_qp_state;
1299         attr->path_mtu            = cmd.path_mtu;
1300         attr->path_mig_state      = cmd.path_mig_state;
1301         attr->qkey                = cmd.qkey;
1302         attr->rq_psn              = cmd.rq_psn;
1303         attr->sq_psn              = cmd.sq_psn;
1304         attr->dest_qp_num         = cmd.dest_qp_num;
1305         attr->qp_access_flags     = cmd.qp_access_flags;
1306         attr->pkey_index          = cmd.pkey_index;
1307         attr->alt_pkey_index      = cmd.alt_pkey_index;
1308         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1309         attr->max_rd_atomic       = cmd.max_rd_atomic;
1310         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1311         attr->min_rnr_timer       = cmd.min_rnr_timer;
1312         attr->port_num            = cmd.port_num;
1313         attr->timeout             = cmd.timeout;
1314         attr->retry_cnt           = cmd.retry_cnt;
1315         attr->rnr_retry           = cmd.rnr_retry;
1316         attr->alt_port_num        = cmd.alt_port_num;
1317         attr->alt_timeout         = cmd.alt_timeout;
1318
1319         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1320         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1321         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1322         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1323         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1324         attr->ah_attr.dlid                  = cmd.dest.dlid;
1325         attr->ah_attr.sl                    = cmd.dest.sl;
1326         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1327         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1328         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1329         attr->ah_attr.port_num              = cmd.dest.port_num;
1330
1331         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1332         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1333         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1334         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1335         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1336         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1337         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1338         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1339         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1340         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1341         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1342
1343         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1344
1345         put_qp_read(qp);
1346
1347         if (ret)
1348                 goto out;
1349
1350         ret = in_len;
1351
1352 out:
1353         kfree(attr);
1354
1355         return ret;
1356 }
1357
1358 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1359                              const char __user *buf, int in_len,
1360                              int out_len)
1361 {
1362         struct ib_uverbs_destroy_qp      cmd;
1363         struct ib_uverbs_destroy_qp_resp resp;
1364         struct ib_uobject               *uobj;
1365         struct ib_qp                    *qp;
1366         struct ib_uqp_object            *obj;
1367         int                              ret = -EINVAL;
1368
1369         if (copy_from_user(&cmd, buf, sizeof cmd))
1370                 return -EFAULT;
1371
1372         memset(&resp, 0, sizeof resp);
1373
1374         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1375         if (!uobj)
1376                 return -EINVAL;
1377         qp  = uobj->object;
1378         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1379
1380         if (!list_empty(&obj->mcast_list)) {
1381                 put_uobj_write(uobj);
1382                 return -EBUSY;
1383         }
1384
1385         ret = ib_destroy_qp(qp);
1386         if (!ret)
1387                 uobj->live = 0;
1388
1389         put_uobj_write(uobj);
1390
1391         if (ret)
1392                 return ret;
1393
1394         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1395
1396         mutex_lock(&file->mutex);
1397         list_del(&uobj->list);
1398         mutex_unlock(&file->mutex);
1399
1400         ib_uverbs_release_uevent(file, &obj->uevent);
1401
1402         resp.events_reported = obj->uevent.events_reported;
1403
1404         put_uobj(uobj);
1405
1406         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1407                          &resp, sizeof resp))
1408                 return -EFAULT;
1409
1410         return in_len;
1411 }
1412
1413 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1414                             const char __user *buf, int in_len,
1415                             int out_len)
1416 {
1417         struct ib_uverbs_post_send      cmd;
1418         struct ib_uverbs_post_send_resp resp;
1419         struct ib_uverbs_send_wr       *user_wr;
1420         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1421         struct ib_qp                   *qp;
1422         int                             i, sg_ind;
1423         int                             is_ud;
1424         ssize_t                         ret = -EINVAL;
1425
1426         if (copy_from_user(&cmd, buf, sizeof cmd))
1427                 return -EFAULT;
1428
1429         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1430             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1431                 return -EINVAL;
1432
1433         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1434                 return -EINVAL;
1435
1436         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1437         if (!user_wr)
1438                 return -ENOMEM;
1439
1440         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1441         if (!qp)
1442                 goto out;
1443
1444         is_ud = qp->qp_type == IB_QPT_UD;
1445         sg_ind = 0;
1446         last = NULL;
1447         for (i = 0; i < cmd.wr_count; ++i) {
1448                 if (copy_from_user(user_wr,
1449                                    buf + sizeof cmd + i * cmd.wqe_size,
1450                                    cmd.wqe_size)) {
1451                         ret = -EFAULT;
1452                         goto out_put;
1453                 }
1454
1455                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1456                         ret = -EINVAL;
1457                         goto out_put;
1458                 }
1459
1460                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1461                                user_wr->num_sge * sizeof (struct ib_sge),
1462                                GFP_KERNEL);
1463                 if (!next) {
1464                         ret = -ENOMEM;
1465                         goto out_put;
1466                 }
1467
1468                 if (!last)
1469                         wr = next;
1470                 else
1471                         last->next = next;
1472                 last = next;
1473
1474                 next->next       = NULL;
1475                 next->wr_id      = user_wr->wr_id;
1476                 next->num_sge    = user_wr->num_sge;
1477                 next->opcode     = user_wr->opcode;
1478                 next->send_flags = user_wr->send_flags;
1479
1480                 if (is_ud) {
1481                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1482                                                      file->ucontext);
1483                         if (!next->wr.ud.ah) {
1484                                 ret = -EINVAL;
1485                                 goto out_put;
1486                         }
1487                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1488                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1489                 } else {
1490                         switch (next->opcode) {
1491                         case IB_WR_RDMA_WRITE_WITH_IMM:
1492                                 next->ex.imm_data =
1493                                         (__be32 __force) user_wr->ex.imm_data;
1494                         case IB_WR_RDMA_WRITE:
1495                         case IB_WR_RDMA_READ:
1496                                 next->wr.rdma.remote_addr =
1497                                         user_wr->wr.rdma.remote_addr;
1498                                 next->wr.rdma.rkey        =
1499                                         user_wr->wr.rdma.rkey;
1500                                 break;
1501                         case IB_WR_SEND_WITH_IMM:
1502                                 next->ex.imm_data =
1503                                         (__be32 __force) user_wr->ex.imm_data;
1504                                 break;
1505                         case IB_WR_SEND_WITH_INV:
1506                                 next->ex.invalidate_rkey =
1507                                         user_wr->ex.invalidate_rkey;
1508                                 break;
1509                         case IB_WR_ATOMIC_CMP_AND_SWP:
1510                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1511                                 next->wr.atomic.remote_addr =
1512                                         user_wr->wr.atomic.remote_addr;
1513                                 next->wr.atomic.compare_add =
1514                                         user_wr->wr.atomic.compare_add;
1515                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1516                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1517                                 break;
1518                         default:
1519                                 break;
1520                         }
1521                 }
1522
1523                 if (next->num_sge) {
1524                         next->sg_list = (void *) next +
1525                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1526                         if (copy_from_user(next->sg_list,
1527                                            buf + sizeof cmd +
1528                                            cmd.wr_count * cmd.wqe_size +
1529                                            sg_ind * sizeof (struct ib_sge),
1530                                            next->num_sge * sizeof (struct ib_sge))) {
1531                                 ret = -EFAULT;
1532                                 goto out_put;
1533                         }
1534                         sg_ind += next->num_sge;
1535                 } else
1536                         next->sg_list = NULL;
1537         }
1538
1539         resp.bad_wr = 0;
1540         ret = qp->device->post_send(qp, wr, &bad_wr);
1541         if (ret)
1542                 for (next = wr; next; next = next->next) {
1543                         ++resp.bad_wr;
1544                         if (next == bad_wr)
1545                                 break;
1546                 }
1547
1548         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1549                          &resp, sizeof resp))
1550                 ret = -EFAULT;
1551
1552 out_put:
1553         put_qp_read(qp);
1554
1555         while (wr) {
1556                 if (is_ud && wr->wr.ud.ah)
1557                         put_ah_read(wr->wr.ud.ah);
1558                 next = wr->next;
1559                 kfree(wr);
1560                 wr = next;
1561         }
1562
1563 out:
1564         kfree(user_wr);
1565
1566         return ret ? ret : in_len;
1567 }
1568
1569 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1570                                                     int in_len,
1571                                                     u32 wr_count,
1572                                                     u32 sge_count,
1573                                                     u32 wqe_size)
1574 {
1575         struct ib_uverbs_recv_wr *user_wr;
1576         struct ib_recv_wr        *wr = NULL, *last, *next;
1577         int                       sg_ind;
1578         int                       i;
1579         int                       ret;
1580
1581         if (in_len < wqe_size * wr_count +
1582             sge_count * sizeof (struct ib_uverbs_sge))
1583                 return ERR_PTR(-EINVAL);
1584
1585         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1586                 return ERR_PTR(-EINVAL);
1587
1588         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1589         if (!user_wr)
1590                 return ERR_PTR(-ENOMEM);
1591
1592         sg_ind = 0;
1593         last = NULL;
1594         for (i = 0; i < wr_count; ++i) {
1595                 if (copy_from_user(user_wr, buf + i * wqe_size,
1596                                    wqe_size)) {
1597                         ret = -EFAULT;
1598                         goto err;
1599                 }
1600
1601                 if (user_wr->num_sge + sg_ind > sge_count) {
1602                         ret = -EINVAL;
1603                         goto err;
1604                 }
1605
1606                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1607                                user_wr->num_sge * sizeof (struct ib_sge),
1608                                GFP_KERNEL);
1609                 if (!next) {
1610                         ret = -ENOMEM;
1611                         goto err;
1612                 }
1613
1614                 if (!last)
1615                         wr = next;
1616                 else
1617                         last->next = next;
1618                 last = next;
1619
1620                 next->next       = NULL;
1621                 next->wr_id      = user_wr->wr_id;
1622                 next->num_sge    = user_wr->num_sge;
1623
1624                 if (next->num_sge) {
1625                         next->sg_list = (void *) next +
1626                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1627                         if (copy_from_user(next->sg_list,
1628                                            buf + wr_count * wqe_size +
1629                                            sg_ind * sizeof (struct ib_sge),
1630                                            next->num_sge * sizeof (struct ib_sge))) {
1631                                 ret = -EFAULT;
1632                                 goto err;
1633                         }
1634                         sg_ind += next->num_sge;
1635                 } else
1636                         next->sg_list = NULL;
1637         }
1638
1639         kfree(user_wr);
1640         return wr;
1641
1642 err:
1643         kfree(user_wr);
1644
1645         while (wr) {
1646                 next = wr->next;
1647                 kfree(wr);
1648                 wr = next;
1649         }
1650
1651         return ERR_PTR(ret);
1652 }
1653
1654 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1655                             const char __user *buf, int in_len,
1656                             int out_len)
1657 {
1658         struct ib_uverbs_post_recv      cmd;
1659         struct ib_uverbs_post_recv_resp resp;
1660         struct ib_recv_wr              *wr, *next, *bad_wr;
1661         struct ib_qp                   *qp;
1662         ssize_t                         ret = -EINVAL;
1663
1664         if (copy_from_user(&cmd, buf, sizeof cmd))
1665                 return -EFAULT;
1666
1667         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1668                                        in_len - sizeof cmd, cmd.wr_count,
1669                                        cmd.sge_count, cmd.wqe_size);
1670         if (IS_ERR(wr))
1671                 return PTR_ERR(wr);
1672
1673         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1674         if (!qp)
1675                 goto out;
1676
1677         resp.bad_wr = 0;
1678         ret = qp->device->post_recv(qp, wr, &bad_wr);
1679
1680         put_qp_read(qp);
1681
1682         if (ret)
1683                 for (next = wr; next; next = next->next) {
1684                         ++resp.bad_wr;
1685                         if (next == bad_wr)
1686                                 break;
1687                 }
1688
1689         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1690                          &resp, sizeof resp))
1691                 ret = -EFAULT;
1692
1693 out:
1694         while (wr) {
1695                 next = wr->next;
1696                 kfree(wr);
1697                 wr = next;
1698         }
1699
1700         return ret ? ret : in_len;
1701 }
1702
1703 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1704                                 const char __user *buf, int in_len,
1705                                 int out_len)
1706 {
1707         struct ib_uverbs_post_srq_recv      cmd;
1708         struct ib_uverbs_post_srq_recv_resp resp;
1709         struct ib_recv_wr                  *wr, *next, *bad_wr;
1710         struct ib_srq                      *srq;
1711         ssize_t                             ret = -EINVAL;
1712
1713         if (copy_from_user(&cmd, buf, sizeof cmd))
1714                 return -EFAULT;
1715
1716         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1717                                        in_len - sizeof cmd, cmd.wr_count,
1718                                        cmd.sge_count, cmd.wqe_size);
1719         if (IS_ERR(wr))
1720                 return PTR_ERR(wr);
1721
1722         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1723         if (!srq)
1724                 goto out;
1725
1726         resp.bad_wr = 0;
1727         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1728
1729         put_srq_read(srq);
1730
1731         if (ret)
1732                 for (next = wr; next; next = next->next) {
1733                         ++resp.bad_wr;
1734                         if (next == bad_wr)
1735                                 break;
1736                 }
1737
1738         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1739                          &resp, sizeof resp))
1740                 ret = -EFAULT;
1741
1742 out:
1743         while (wr) {
1744                 next = wr->next;
1745                 kfree(wr);
1746                 wr = next;
1747         }
1748
1749         return ret ? ret : in_len;
1750 }
1751
1752 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1753                             const char __user *buf, int in_len,
1754                             int out_len)
1755 {
1756         struct ib_uverbs_create_ah       cmd;
1757         struct ib_uverbs_create_ah_resp  resp;
1758         struct ib_uobject               *uobj;
1759         struct ib_pd                    *pd;
1760         struct ib_ah                    *ah;
1761         struct ib_ah_attr               attr;
1762         int ret;
1763
1764         if (out_len < sizeof resp)
1765                 return -ENOSPC;
1766
1767         if (copy_from_user(&cmd, buf, sizeof cmd))
1768                 return -EFAULT;
1769
1770         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1771         if (!uobj)
1772                 return -ENOMEM;
1773
1774         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1775         down_write(&uobj->mutex);
1776
1777         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1778         if (!pd) {
1779                 ret = -EINVAL;
1780                 goto err;
1781         }
1782
1783         attr.dlid              = cmd.attr.dlid;
1784         attr.sl                = cmd.attr.sl;
1785         attr.src_path_bits     = cmd.attr.src_path_bits;
1786         attr.static_rate       = cmd.attr.static_rate;
1787         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1788         attr.port_num          = cmd.attr.port_num;
1789         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1790         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1791         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1792         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1793         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1794
1795         ah = ib_create_ah(pd, &attr);
1796         if (IS_ERR(ah)) {
1797                 ret = PTR_ERR(ah);
1798                 goto err_put;
1799         }
1800
1801         ah->uobject  = uobj;
1802         uobj->object = ah;
1803
1804         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1805         if (ret)
1806                 goto err_destroy;
1807
1808         resp.ah_handle = uobj->id;
1809
1810         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1811                          &resp, sizeof resp)) {
1812                 ret = -EFAULT;
1813                 goto err_copy;
1814         }
1815
1816         put_pd_read(pd);
1817
1818         mutex_lock(&file->mutex);
1819         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1820         mutex_unlock(&file->mutex);
1821
1822         uobj->live = 1;
1823
1824         up_write(&uobj->mutex);
1825
1826         return in_len;
1827
1828 err_copy:
1829         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1830
1831 err_destroy:
1832         ib_destroy_ah(ah);
1833
1834 err_put:
1835         put_pd_read(pd);
1836
1837 err:
1838         put_uobj_write(uobj);
1839         return ret;
1840 }
1841
1842 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1843                              const char __user *buf, int in_len, int out_len)
1844 {
1845         struct ib_uverbs_destroy_ah cmd;
1846         struct ib_ah               *ah;
1847         struct ib_uobject          *uobj;
1848         int                         ret;
1849
1850         if (copy_from_user(&cmd, buf, sizeof cmd))
1851                 return -EFAULT;
1852
1853         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1854         if (!uobj)
1855                 return -EINVAL;
1856         ah = uobj->object;
1857
1858         ret = ib_destroy_ah(ah);
1859         if (!ret)
1860                 uobj->live = 0;
1861
1862         put_uobj_write(uobj);
1863
1864         if (ret)
1865                 return ret;
1866
1867         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1868
1869         mutex_lock(&file->mutex);
1870         list_del(&uobj->list);
1871         mutex_unlock(&file->mutex);
1872
1873         put_uobj(uobj);
1874
1875         return in_len;
1876 }
1877
1878 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1879                                const char __user *buf, int in_len,
1880                                int out_len)
1881 {
1882         struct ib_uverbs_attach_mcast cmd;
1883         struct ib_qp                 *qp;
1884         struct ib_uqp_object         *obj;
1885         struct ib_uverbs_mcast_entry *mcast;
1886         int                           ret;
1887
1888         if (copy_from_user(&cmd, buf, sizeof cmd))
1889                 return -EFAULT;
1890
1891         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1892         if (!qp)
1893                 return -EINVAL;
1894
1895         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1896
1897         list_for_each_entry(mcast, &obj->mcast_list, list)
1898                 if (cmd.mlid == mcast->lid &&
1899                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1900                         ret = 0;
1901                         goto out_put;
1902                 }
1903
1904         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1905         if (!mcast) {
1906                 ret = -ENOMEM;
1907                 goto out_put;
1908         }
1909
1910         mcast->lid = cmd.mlid;
1911         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1912
1913         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1914         if (!ret)
1915                 list_add_tail(&mcast->list, &obj->mcast_list);
1916         else
1917                 kfree(mcast);
1918
1919 out_put:
1920         put_qp_read(qp);
1921
1922         return ret ? ret : in_len;
1923 }
1924
1925 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1926                                const char __user *buf, int in_len,
1927                                int out_len)
1928 {
1929         struct ib_uverbs_detach_mcast cmd;
1930         struct ib_uqp_object         *obj;
1931         struct ib_qp                 *qp;
1932         struct ib_uverbs_mcast_entry *mcast;
1933         int                           ret = -EINVAL;
1934
1935         if (copy_from_user(&cmd, buf, sizeof cmd))
1936                 return -EFAULT;
1937
1938         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1939         if (!qp)
1940                 return -EINVAL;
1941
1942         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1943         if (ret)
1944                 goto out_put;
1945
1946         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1947
1948         list_for_each_entry(mcast, &obj->mcast_list, list)
1949                 if (cmd.mlid == mcast->lid &&
1950                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1951                         list_del(&mcast->list);
1952                         kfree(mcast);
1953                         break;
1954                 }
1955
1956 out_put:
1957         put_qp_read(qp);
1958
1959         return ret ? ret : in_len;
1960 }
1961
1962 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1963                              const char __user *buf, int in_len,
1964                              int out_len)
1965 {
1966         struct ib_uverbs_create_srq      cmd;
1967         struct ib_uverbs_create_srq_resp resp;
1968         struct ib_udata                  udata;
1969         struct ib_uevent_object         *obj;
1970         struct ib_pd                    *pd;
1971         struct ib_srq                   *srq;
1972         struct ib_srq_init_attr          attr;
1973         int ret;
1974
1975         if (out_len < sizeof resp)
1976                 return -ENOSPC;
1977
1978         if (copy_from_user(&cmd, buf, sizeof cmd))
1979                 return -EFAULT;
1980
1981         INIT_UDATA(&udata, buf + sizeof cmd,
1982                    (unsigned long) cmd.response + sizeof resp,
1983                    in_len - sizeof cmd, out_len - sizeof resp);
1984
1985         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1986         if (!obj)
1987                 return -ENOMEM;
1988
1989         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1990         down_write(&obj->uobject.mutex);
1991
1992         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1993         if (!pd) {
1994                 ret = -EINVAL;
1995                 goto err;
1996         }
1997
1998         attr.event_handler  = ib_uverbs_srq_event_handler;
1999         attr.srq_context    = file;
2000         attr.attr.max_wr    = cmd.max_wr;
2001         attr.attr.max_sge   = cmd.max_sge;
2002         attr.attr.srq_limit = cmd.srq_limit;
2003
2004         obj->events_reported     = 0;
2005         INIT_LIST_HEAD(&obj->event_list);
2006
2007         srq = pd->device->create_srq(pd, &attr, &udata);
2008         if (IS_ERR(srq)) {
2009                 ret = PTR_ERR(srq);
2010                 goto err_put;
2011         }
2012
2013         srq->device        = pd->device;
2014         srq->pd            = pd;
2015         srq->uobject       = &obj->uobject;
2016         srq->event_handler = attr.event_handler;
2017         srq->srq_context   = attr.srq_context;
2018         atomic_inc(&pd->usecnt);
2019         atomic_set(&srq->usecnt, 0);
2020
2021         obj->uobject.object = srq;
2022         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2023         if (ret)
2024                 goto err_destroy;
2025
2026         memset(&resp, 0, sizeof resp);
2027         resp.srq_handle = obj->uobject.id;
2028         resp.max_wr     = attr.attr.max_wr;
2029         resp.max_sge    = attr.attr.max_sge;
2030
2031         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2032                          &resp, sizeof resp)) {
2033                 ret = -EFAULT;
2034                 goto err_copy;
2035         }
2036
2037         put_pd_read(pd);
2038
2039         mutex_lock(&file->mutex);
2040         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2041         mutex_unlock(&file->mutex);
2042
2043         obj->uobject.live = 1;
2044
2045         up_write(&obj->uobject.mutex);
2046
2047         return in_len;
2048
2049 err_copy:
2050         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2051
2052 err_destroy:
2053         ib_destroy_srq(srq);
2054
2055 err_put:
2056         put_pd_read(pd);
2057
2058 err:
2059         put_uobj_write(&obj->uobject);
2060         return ret;
2061 }
2062
2063 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2064                              const char __user *buf, int in_len,
2065                              int out_len)
2066 {
2067         struct ib_uverbs_modify_srq cmd;
2068         struct ib_udata             udata;
2069         struct ib_srq              *srq;
2070         struct ib_srq_attr          attr;
2071         int                         ret;
2072
2073         if (copy_from_user(&cmd, buf, sizeof cmd))
2074                 return -EFAULT;
2075
2076         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2077                    out_len);
2078
2079         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2080         if (!srq)
2081                 return -EINVAL;
2082
2083         attr.max_wr    = cmd.max_wr;
2084         attr.srq_limit = cmd.srq_limit;
2085
2086         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2087
2088         put_srq_read(srq);
2089
2090         return ret ? ret : in_len;
2091 }
2092
2093 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2094                             const char __user *buf,
2095                             int in_len, int out_len)
2096 {
2097         struct ib_uverbs_query_srq      cmd;
2098         struct ib_uverbs_query_srq_resp resp;
2099         struct ib_srq_attr              attr;
2100         struct ib_srq                   *srq;
2101         int                             ret;
2102
2103         if (out_len < sizeof resp)
2104                 return -ENOSPC;
2105
2106         if (copy_from_user(&cmd, buf, sizeof cmd))
2107                 return -EFAULT;
2108
2109         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2110         if (!srq)
2111                 return -EINVAL;
2112
2113         ret = ib_query_srq(srq, &attr);
2114
2115         put_srq_read(srq);
2116
2117         if (ret)
2118                 return ret;
2119
2120         memset(&resp, 0, sizeof resp);
2121
2122         resp.max_wr    = attr.max_wr;
2123         resp.max_sge   = attr.max_sge;
2124         resp.srq_limit = attr.srq_limit;
2125
2126         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2127                          &resp, sizeof resp))
2128                 return -EFAULT;
2129
2130         return in_len;
2131 }
2132
2133 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2134                               const char __user *buf, int in_len,
2135                               int out_len)
2136 {
2137         struct ib_uverbs_destroy_srq      cmd;
2138         struct ib_uverbs_destroy_srq_resp resp;
2139         struct ib_uobject                *uobj;
2140         struct ib_srq                    *srq;
2141         struct ib_uevent_object          *obj;
2142         int                               ret = -EINVAL;
2143
2144         if (copy_from_user(&cmd, buf, sizeof cmd))
2145                 return -EFAULT;
2146
2147         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2148         if (!uobj)
2149                 return -EINVAL;
2150         srq = uobj->object;
2151         obj = container_of(uobj, struct ib_uevent_object, uobject);
2152
2153         ret = ib_destroy_srq(srq);
2154         if (!ret)
2155                 uobj->live = 0;
2156
2157         put_uobj_write(uobj);
2158
2159         if (ret)
2160                 return ret;
2161
2162         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2163
2164         mutex_lock(&file->mutex);
2165         list_del(&uobj->list);
2166         mutex_unlock(&file->mutex);
2167
2168         ib_uverbs_release_uevent(file, obj);
2169
2170         memset(&resp, 0, sizeof resp);
2171         resp.events_reported = obj->events_reported;
2172
2173         put_uobj(uobj);
2174
2175         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2176                          &resp, sizeof resp))
2177                 ret = -EFAULT;
2178
2179         return ret ? ret : in_len;
2180 }