drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006 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  * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
  36  */
  37
  38 #include <linux/file.h>
  39 #include <linux/fs.h>
  40
  41 #include <asm/uaccess.h>
  42
  43 #include "uverbs.h"
  44
  45 static struct lock_class_key pd_lock_key;
  46 static struct lock_class_key mr_lock_key;
  47 static struct lock_class_key cq_lock_key;
  48 static struct lock_class_key qp_lock_key;
  49 static struct lock_class_key ah_lock_key;
  50 static struct lock_class_key srq_lock_key;
  51
  52 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  53         do {                                                            \
  54                 (udata)->inbuf  = (void __user *) (ibuf);               \
  55                 (udata)->outbuf = (void __user *) (obuf);               \
  56                 (udata)->inlen  = (ilen);                               \
  57                 (udata)->outlen = (olen);                               \
  58         } while (0)
  59
  60 /*
  61  * The ib_uobject locking scheme is as follows:
  62  *
  63  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  64  *   needs to be held during all idr operations.  When an object is
  65  *   looked up, a reference must be taken on the object's kref before
  66  *   dropping this lock.
  67  *
  68  * - Each object also has an rwsem.  This rwsem must be held for
  69  *   reading while an operation that uses the object is performed.
  70  *   For example, while registering an MR, the associated PD's
  71  *   uobject.mutex must be held for reading.  The rwsem must be held
  72  *   for writing while initializing or destroying an object.
  73  *
  74  * - In addition, each object has a "live" flag.  If this flag is not
  75  *   set, then lookups of the object will fail even if it is found in
  76  *   the idr.  This handles a reader that blocks and does not acquire
  77  *   the rwsem until after the object is destroyed.  The destroy
  78  *   operation will set the live flag to 0 and then drop the rwsem;
  79  *   this will allow the reader to acquire the rwsem, see that the
  80  *   live flag is 0, and then drop the rwsem and its reference to
  81  *   object.  The underlying storage will not be freed until the last
  82  *   reference to the object is dropped.
  83  */
  84
  85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  86                       struct ib_ucontext *context, struct lock_class_key *key)
  87 {
  88         uobj->user_handle = user_handle;
  89         uobj->context     = context;
  90         kref_init(&uobj->ref);
  91         init_rwsem(&uobj->mutex);
  92         lockdep_set_class(&uobj->mutex, key);
  93         uobj->live        = 0;
  94 }
  95
  96 static void release_uobj(struct kref *kref)
  97 {
  98         kfree(container_of(kref, struct ib_uobject, ref));
  99 }
 100
 101 static void put_uobj(struct ib_uobject *uobj)
 102 {
 103         kref_put(&uobj->ref, release_uobj);
 104 }
 105
 106 static void put_uobj_read(struct ib_uobject *uobj)
 107 {
 108         up_read(&uobj->mutex);
 109         put_uobj(uobj);
 110 }
 111
 112 static void put_uobj_write(struct ib_uobject *uobj)
 113 {
 114         up_write(&uobj->mutex);
 115         put_uobj(uobj);
 116 }
 117
 118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 119 {
 120         int ret;
 121
 122 retry:
 123         if (!idr_pre_get(idr, GFP_KERNEL))
 124                 return -ENOMEM;
 125
 126         spin_lock(&ib_uverbs_idr_lock);
 127         ret = idr_get_new(idr, uobj, &uobj->id);
 128         spin_unlock(&ib_uverbs_idr_lock);
 129
 130         if (ret == -EAGAIN)
 131                 goto retry;
 132
 133         return ret;
 134 }
 135
 136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 137 {
 138         spin_lock(&ib_uverbs_idr_lock);
 139         idr_remove(idr, uobj->id);
 140         spin_unlock(&ib_uverbs_idr_lock);
 141 }
 142
 143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 144                                          struct ib_ucontext *context)
 145 {
 146         struct ib_uobject *uobj;
 147
 148         spin_lock(&ib_uverbs_idr_lock);
 149         uobj = idr_find(idr, id);
 150         if (uobj)
 151                 kref_get(&uobj->ref);
 152         spin_unlock(&ib_uverbs_idr_lock);
 153
 154         return uobj;
 155 }
 156
 157 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 158                                         struct ib_ucontext *context)
 159 {
 160         struct ib_uobject *uobj;
 161
 162         uobj = __idr_get_uobj(idr, id, context);
 163         if (!uobj)
 164                 return NULL;
 165
 166         down_read(&uobj->mutex);
 167         if (!uobj->live) {
 168                 put_uobj_read(uobj);
 169                 return NULL;
 170         }
 171
 172         return uobj;
 173 }
 174
 175 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 176                                          struct ib_ucontext *context)
 177 {
 178         struct ib_uobject *uobj;
 179
 180         uobj = __idr_get_uobj(idr, id, context);
 181         if (!uobj)
 182                 return NULL;
 183
 184         down_write(&uobj->mutex);
 185         if (!uobj->live) {
 186                 put_uobj_write(uobj);
 187                 return NULL;
 188         }
 189
 190         return uobj;
 191 }
 192
 193 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context)
 194 {
 195         struct ib_uobject *uobj;
 196
 197         uobj = idr_read_uobj(idr, id, context);
 198         return uobj ? uobj->object : NULL;
 199 }
 200
 201 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 202 {
 203         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context);
 204 }
 205
 206 static void put_pd_read(struct ib_pd *pd)
 207 {
 208         put_uobj_read(pd->uobject);
 209 }
 210
 211 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context)
 212 {
 213         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context);
 214 }
 215
 216 static void put_cq_read(struct ib_cq *cq)
 217 {
 218         put_uobj_read(cq->uobject);
 219 }
 220
 221 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 222 {
 223         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context);
 224 }
 225
 226 static void put_ah_read(struct ib_ah *ah)
 227 {
 228         put_uobj_read(ah->uobject);
 229 }
 230
 231 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 232 {
 233         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context);
 234 }
 235
 236 static void put_qp_read(struct ib_qp *qp)
 237 {
 238         put_uobj_read(qp->uobject);
 239 }
 240
 241 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 242 {
 243         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context);
 244 }
 245
 246 static void put_srq_read(struct ib_srq *srq)
 247 {
 248         put_uobj_read(srq->uobject);
 249 }
 250
 251 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 252                               const char __user *buf,
 253                               int in_len, int out_len)
 254 {
 255         struct ib_uverbs_get_context      cmd;
 256         struct ib_uverbs_get_context_resp resp;
 257         struct ib_udata                   udata;
 258         struct ib_device                 *ibdev = file->device->ib_dev;
 259         struct ib_ucontext               *ucontext;
 260         struct file                      *filp;
 261         int ret;
 262
 263         if (out_len < sizeof resp)
 264                 return -ENOSPC;
 265
 266         if (copy_from_user(&cmd, buf, sizeof cmd))
 267                 return -EFAULT;
 268
 269         mutex_lock(&file->mutex);
 270
 271         if (file->ucontext) {
 272                 ret = -EINVAL;
 273                 goto err;
 274         }
 275
 276         INIT_UDATA(&udata, buf + sizeof cmd,
 277                    (unsigned long) cmd.response + sizeof resp,
 278                    in_len - sizeof cmd, out_len - sizeof resp);
 279
 280         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 281         if (IS_ERR(ucontext)) {
 282                 ret = PTR_ERR(file->ucontext);
 283                 goto err;
 284         }
 285
 286         ucontext->device = ibdev;
 287         INIT_LIST_HEAD(&ucontext->pd_list);
 288         INIT_LIST_HEAD(&ucontext->mr_list);
 289         INIT_LIST_HEAD(&ucontext->mw_list);
 290         INIT_LIST_HEAD(&ucontext->cq_list);
 291         INIT_LIST_HEAD(&ucontext->qp_list);
 292         INIT_LIST_HEAD(&ucontext->srq_list);
 293         INIT_LIST_HEAD(&ucontext->ah_list);
 294
 295         resp.num_comp_vectors = file->device->num_comp_vectors;
 296
 297         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 298         if (IS_ERR(filp)) {
 299                 ret = PTR_ERR(filp);
 300                 goto err_free;
 301         }
 302
 303         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 304                          &resp, sizeof resp)) {
 305                 ret = -EFAULT;
 306                 goto err_file;
 307         }
 308
 309         file->async_file = filp->private_data;
 310
 311         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 312                               ib_uverbs_event_handler);
 313         ret = ib_register_event_handler(&file->event_handler);
 314         if (ret)
 315                 goto err_file;
 316
 317         kref_get(&file->async_file->ref);
 318         kref_get(&file->ref);
 319         file->ucontext = ucontext;
 320
 321         fd_install(resp.async_fd, filp);
 322
 323         mutex_unlock(&file->mutex);
 324
 325         return in_len;
 326
 327 err_file:
 328         put_unused_fd(resp.async_fd);
 329         fput(filp);
 330
 331 err_free:
 332         ibdev->dealloc_ucontext(ucontext);
 333
 334 err:
 335         mutex_unlock(&file->mutex);
 336         return ret;
 337 }
 338
 339 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 340                                const char __user *buf,
 341                                int in_len, int out_len)
 342 {
 343         struct ib_uverbs_query_device      cmd;
 344         struct ib_uverbs_query_device_resp resp;
 345         struct ib_device_attr              attr;
 346         int                                ret;
 347
 348         if (out_len < sizeof resp)
 349                 return -ENOSPC;
 350
 351         if (copy_from_user(&cmd, buf, sizeof cmd))
 352                 return -EFAULT;
 353
 354         ret = ib_query_device(file->device->ib_dev, &attr);
 355         if (ret)
 356                 return ret;
 357
 358         memset(&resp, 0, sizeof resp);
 359
 360         resp.fw_ver                    = attr.fw_ver;
 361         resp.node_guid                 = file->device->ib_dev->node_guid;
 362         resp.sys_image_guid            = attr.sys_image_guid;
 363         resp.max_mr_size               = attr.max_mr_size;
 364         resp.page_size_cap             = attr.page_size_cap;
 365         resp.vendor_id                 = attr.vendor_id;
 366         resp.vendor_part_id            = attr.vendor_part_id;
 367         resp.hw_ver                    = attr.hw_ver;
 368         resp.max_qp                    = attr.max_qp;
 369         resp.max_qp_wr                 = attr.max_qp_wr;
 370         resp.device_cap_flags          = attr.device_cap_flags;
 371         resp.max_sge                   = attr.max_sge;
 372         resp.max_sge_rd                = attr.max_sge_rd;
 373         resp.max_cq                    = attr.max_cq;
 374         resp.max_cqe                   = attr.max_cqe;
 375         resp.max_mr                    = attr.max_mr;
 376         resp.max_pd                    = attr.max_pd;
 377         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 378         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 379         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 380         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 381         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 382         resp.atomic_cap                = attr.atomic_cap;
 383         resp.max_ee                    = attr.max_ee;
 384         resp.max_rdd                   = attr.max_rdd;
 385         resp.max_mw                    = attr.max_mw;
 386         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 387         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 388         resp.max_mcast_grp             = attr.max_mcast_grp;
 389         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 390         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 391         resp.max_ah                    = attr.max_ah;
 392         resp.max_fmr                   = attr.max_fmr;
 393         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 394         resp.max_srq                   = attr.max_srq;
 395         resp.max_srq_wr                = attr.max_srq_wr;
 396         resp.max_srq_sge               = attr.max_srq_sge;
 397         resp.max_pkeys                 = attr.max_pkeys;
 398         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 399         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 400
 401         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 402                          &resp, sizeof resp))
 403                 return -EFAULT;
 404
 405         return in_len;
 406 }
 407
 408 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 409                              const char __user *buf,
 410                              int in_len, int out_len)
 411 {
 412         struct ib_uverbs_query_port      cmd;
 413         struct ib_uverbs_query_port_resp resp;
 414         struct ib_port_attr              attr;
 415         int                              ret;
 416
 417         if (out_len < sizeof resp)
 418                 return -ENOSPC;
 419
 420         if (copy_from_user(&cmd, buf, sizeof cmd))
 421                 return -EFAULT;
 422
 423         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 424         if (ret)
 425                 return ret;
 426
 427         memset(&resp, 0, sizeof resp);
 428
 429         resp.state           = attr.state;
 430         resp.max_mtu         = attr.max_mtu;
 431         resp.active_mtu      = attr.active_mtu;
 432         resp.gid_tbl_len     = attr.gid_tbl_len;
 433         resp.port_cap_flags  = attr.port_cap_flags;
 434         resp.max_msg_sz      = attr.max_msg_sz;
 435         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 436         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 437         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 438         resp.lid             = attr.lid;
 439         resp.sm_lid          = attr.sm_lid;
 440         resp.lmc             = attr.lmc;
 441         resp.max_vl_num      = attr.max_vl_num;
 442         resp.sm_sl           = attr.sm_sl;
 443         resp.subnet_timeout  = attr.subnet_timeout;
 444         resp.init_type_reply = attr.init_type_reply;
 445         resp.active_width    = attr.active_width;
 446         resp.active_speed    = attr.active_speed;
 447         resp.phys_state      = attr.phys_state;
 448
 449         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 450                          &resp, sizeof resp))
 451                 return -EFAULT;
 452
 453         return in_len;
 454 }
 455
 456 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 457                            const char __user *buf,
 458                            int in_len, int out_len)
 459 {
 460         struct ib_uverbs_alloc_pd      cmd;
 461         struct ib_uverbs_alloc_pd_resp resp;
 462         struct ib_udata                udata;
 463         struct ib_uobject             *uobj;
 464         struct ib_pd                  *pd;
 465         int                            ret;
 466
 467         if (out_len < sizeof resp)
 468                 return -ENOSPC;
 469
 470         if (copy_from_user(&cmd, buf, sizeof cmd))
 471                 return -EFAULT;
 472
 473         INIT_UDATA(&udata, buf + sizeof cmd,
 474                    (unsigned long) cmd.response + sizeof resp,
 475                    in_len - sizeof cmd, out_len - sizeof resp);
 476
 477         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 478         if (!uobj)
 479                 return -ENOMEM;
 480
 481         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 482         down_write(&uobj->mutex);
 483
 484         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 485                                             file->ucontext, &udata);
 486         if (IS_ERR(pd)) {
 487                 ret = PTR_ERR(pd);
 488                 goto err;
 489         }
 490
 491         pd->device  = file->device->ib_dev;
 492         pd->uobject = uobj;
 493         atomic_set(&pd->usecnt, 0);
 494
 495         uobj->object = pd;
 496         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 497         if (ret)
 498                 goto err_idr;
 499
 500         memset(&resp, 0, sizeof resp);
 501         resp.pd_handle = uobj->id;
 502
 503         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 504                          &resp, sizeof resp)) {
 505                 ret = -EFAULT;
 506                 goto err_copy;
 507         }
 508
 509         mutex_lock(&file->mutex);
 510         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 511         mutex_unlock(&file->mutex);
 512
 513         uobj->live = 1;
 514
 515         up_write(&uobj->mutex);
 516
 517         return in_len;
 518
 519 err_copy:
 520         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 521
 522 err_idr:
 523         ib_dealloc_pd(pd);
 524
 525 err:
 526         put_uobj_write(uobj);
 527         return ret;
 528 }
 529
 530 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 531                              const char __user *buf,
 532                              int in_len, int out_len)
 533 {
 534         struct ib_uverbs_dealloc_pd cmd;
 535         struct ib_uobject          *uobj;
 536         int                         ret;
 537
 538         if (copy_from_user(&cmd, buf, sizeof cmd))
 539                 return -EFAULT;
 540
 541         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 542         if (!uobj)
 543                 return -EINVAL;
 544
 545         ret = ib_dealloc_pd(uobj->object);
 546         if (!ret)
 547                 uobj->live = 0;
 548
 549         put_uobj_write(uobj);
 550
 551         if (ret)
 552                 return ret;
 553
 554         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 555
 556         mutex_lock(&file->mutex);
 557         list_del(&uobj->list);
 558         mutex_unlock(&file->mutex);
 559
 560         put_uobj(uobj);
 561
 562         return in_len;
 563 }
 564
 565 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 566                          const char __user *buf, int in_len,
 567                          int out_len)
 568 {
 569         struct ib_uverbs_reg_mr      cmd;
 570         struct ib_uverbs_reg_mr_resp resp;
 571         struct ib_udata              udata;
 572         struct ib_umem_object       *obj;
 573         struct ib_pd                *pd;
 574         struct ib_mr                *mr;
 575         int                          ret;
 576
 577         if (out_len < sizeof resp)
 578                 return -ENOSPC;
 579
 580         if (copy_from_user(&cmd, buf, sizeof cmd))
 581                 return -EFAULT;
 582
 583         INIT_UDATA(&udata, buf + sizeof cmd,
 584                    (unsigned long) cmd.response + sizeof resp,
 585                    in_len - sizeof cmd, out_len - sizeof resp);
 586
 587         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 588                 return -EINVAL;
 589
 590         /*
 591          * Local write permission is required if remote write or
 592          * remote atomic permission is also requested.
 593          */
 594         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 595             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 596                 return -EINVAL;
 597
 598         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 599         if (!obj)
 600                 return -ENOMEM;
 601
 602         init_uobj(&obj->uobject, 0, file->ucontext, &mr_lock_key);
 603         down_write(&obj->uobject.mutex);
 604
 605         /*
 606          * We ask for writable memory if any access flags other than
 607          * "remote read" are set.  "Local write" and "remote write"
 608          * obviously require write access.  "Remote atomic" can do
 609          * things like fetch and add, which will modify memory, and
 610          * "MW bind" can change permissions by binding a window.
 611          */
 612         ret = ib_umem_get(file->device->ib_dev, &obj->umem,
 613                           (void *) (unsigned long) cmd.start, cmd.length,
 614                           !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
 615         if (ret)
 616                 goto err_free;
 617
 618         obj->umem.virt_base = cmd.hca_va;
 619
 620         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 621         if (!pd)
 622                 goto err_release;
 623
 624         mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
 625         if (IS_ERR(mr)) {
 626                 ret = PTR_ERR(mr);
 627                 goto err_put;
 628         }
 629
 630         mr->device  = pd->device;
 631         mr->pd      = pd;
 632         mr->uobject = &obj->uobject;
 633         atomic_inc(&pd->usecnt);
 634         atomic_set(&mr->usecnt, 0);
 635
 636         obj->uobject.object = mr;
 637         ret = idr_add_uobj(&ib_uverbs_mr_idr, &obj->uobject);
 638         if (ret)
 639                 goto err_unreg;
 640
 641         memset(&resp, 0, sizeof resp);
 642         resp.lkey      = mr->lkey;
 643         resp.rkey      = mr->rkey;
 644         resp.mr_handle = obj->uobject.id;
 645
 646         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 647                          &resp, sizeof resp)) {
 648                 ret = -EFAULT;
 649                 goto err_copy;
 650         }
 651
 652         put_pd_read(pd);
 653
 654         mutex_lock(&file->mutex);
 655         list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
 656         mutex_unlock(&file->mutex);
 657
 658         obj->uobject.live = 1;
 659
 660         up_write(&obj->uobject.mutex);
 661
 662         return in_len;
 663
 664 err_copy:
 665         idr_remove_uobj(&ib_uverbs_mr_idr, &obj->uobject);
 666
 667 err_unreg:
 668         ib_dereg_mr(mr);
 669
 670 err_put:
 671         put_pd_read(pd);
 672
 673 err_release:
 674         ib_umem_release(file->device->ib_dev, &obj->umem);
 675
 676 err_free:
 677         put_uobj_write(&obj->uobject);
 678         return ret;
 679 }
 680
 681 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 682                            const char __user *buf, int in_len,
 683                            int out_len)
 684 {
 685         struct ib_uverbs_dereg_mr cmd;
 686         struct ib_mr             *mr;
 687         struct ib_uobject        *uobj;
 688         struct ib_umem_object    *memobj;
 689         int                       ret = -EINVAL;
 690
 691         if (copy_from_user(&cmd, buf, sizeof cmd))
 692                 return -EFAULT;
 693
 694         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 695         if (!uobj)
 696                 return -EINVAL;
 697
 698         memobj = container_of(uobj, struct ib_umem_object, uobject);
 699         mr     = uobj->object;
 700
 701         ret = ib_dereg_mr(mr);
 702         if (!ret)
 703                 uobj->live = 0;
 704
 705         put_uobj_write(uobj);
 706
 707         if (ret)
 708                 return ret;
 709
 710         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 711
 712         mutex_lock(&file->mutex);
 713         list_del(&uobj->list);
 714         mutex_unlock(&file->mutex);
 715
 716         ib_umem_release(file->device->ib_dev, &memobj->umem);
 717
 718         put_uobj(uobj);
 719
 720         return in_len;
 721 }
 722
 723 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 724                                       const char __user *buf, int in_len,
 725                                       int out_len)
 726 {
 727         struct ib_uverbs_create_comp_channel       cmd;
 728         struct ib_uverbs_create_comp_channel_resp  resp;
 729         struct file                               *filp;
 730
 731         if (out_len < sizeof resp)
 732                 return -ENOSPC;
 733
 734         if (copy_from_user(&cmd, buf, sizeof cmd))
 735                 return -EFAULT;
 736
 737         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 738         if (IS_ERR(filp))
 739                 return PTR_ERR(filp);
 740
 741         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 742                          &resp, sizeof resp)) {
 743                 put_unused_fd(resp.fd);
 744                 fput(filp);
 745                 return -EFAULT;
 746         }
 747
 748         fd_install(resp.fd, filp);
 749         return in_len;
 750 }
 751
 752 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 753                             const char __user *buf, int in_len,
 754                             int out_len)
 755 {
 756         struct ib_uverbs_create_cq      cmd;
 757         struct ib_uverbs_create_cq_resp resp;
 758         struct ib_udata                 udata;
 759         struct ib_ucq_object           *obj;
 760         struct ib_uverbs_event_file    *ev_file = NULL;
 761         struct ib_cq                   *cq;
 762         int                             ret;
 763
 764         if (out_len < sizeof resp)
 765                 return -ENOSPC;
 766
 767         if (copy_from_user(&cmd, buf, sizeof cmd))
 768                 return -EFAULT;
 769
 770         INIT_UDATA(&udata, buf + sizeof cmd,
 771                    (unsigned long) cmd.response + sizeof resp,
 772                    in_len - sizeof cmd, out_len - sizeof resp);
 773
 774         if (cmd.comp_vector >= file->device->num_comp_vectors)
 775                 return -EINVAL;
 776
 777         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 778         if (!obj)
 779                 return -ENOMEM;
 780
 781         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 782         down_write(&obj->uobject.mutex);
 783
 784         if (cmd.comp_channel >= 0) {
 785                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 786                 if (!ev_file) {
 787                         ret = -EINVAL;
 788                         goto err;
 789                 }
 790         }
 791
 792         obj->uverbs_file           = file;
 793         obj->comp_events_reported  = 0;
 794         obj->async_events_reported = 0;
 795         INIT_LIST_HEAD(&obj->comp_list);
 796         INIT_LIST_HEAD(&obj->async_list);
 797
 798         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 799                                              file->ucontext, &udata);
 800         if (IS_ERR(cq)) {
 801                 ret = PTR_ERR(cq);
 802                 goto err_file;
 803         }
 804
 805         cq->device        = file->device->ib_dev;
 806         cq->uobject       = &obj->uobject;
 807         cq->comp_handler  = ib_uverbs_comp_handler;
 808         cq->event_handler = ib_uverbs_cq_event_handler;
 809         cq->cq_context    = ev_file;
 810         atomic_set(&cq->usecnt, 0);
 811
 812         obj->uobject.object = cq;
 813         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 814         if (ret)
 815                 goto err_free;
 816
 817         memset(&resp, 0, sizeof resp);
 818         resp.cq_handle = obj->uobject.id;
 819         resp.cqe       = cq->cqe;
 820
 821         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 822                          &resp, sizeof resp)) {
 823                 ret = -EFAULT;
 824                 goto err_copy;
 825         }
 826
 827         mutex_lock(&file->mutex);
 828         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 829         mutex_unlock(&file->mutex);
 830
 831         obj->uobject.live = 1;
 832
 833         up_write(&obj->uobject.mutex);
 834
 835         return in_len;
 836
 837 err_copy:
 838         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 839
 840
 841 err_free:
 842         ib_destroy_cq(cq);
 843
 844 err_file:
 845         if (ev_file)
 846                 ib_uverbs_release_ucq(file, ev_file, obj);
 847
 848 err:
 849         put_uobj_write(&obj->uobject);
 850         return ret;
 851 }
 852
 853 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 854                             const char __user *buf, int in_len,
 855                             int out_len)
 856 {
 857         struct ib_uverbs_resize_cq      cmd;
 858         struct ib_uverbs_resize_cq_resp resp;
 859         struct ib_udata                 udata;
 860         struct ib_cq                    *cq;
 861         int                             ret = -EINVAL;
 862
 863         if (copy_from_user(&cmd, buf, sizeof cmd))
 864                 return -EFAULT;
 865
 866         INIT_UDATA(&udata, buf + sizeof cmd,
 867                    (unsigned long) cmd.response + sizeof resp,
 868                    in_len - sizeof cmd, out_len - sizeof resp);
 869
 870         cq = idr_read_cq(cmd.cq_handle, file->ucontext);
 871         if (!cq)
 872                 return -EINVAL;
 873
 874         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 875         if (ret)
 876                 goto out;
 877
 878         memset(&resp, 0, sizeof resp);
 879         resp.cqe = cq->cqe;
 880
 881         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 882                          &resp, sizeof resp))
 883                 ret = -EFAULT;
 884
 885 out:
 886         put_cq_read(cq);
 887
 888         return ret ? ret : in_len;
 889 }
 890
 891 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 892                           const char __user *buf, int in_len,
 893                           int out_len)
 894 {
 895         struct ib_uverbs_poll_cq       cmd;
 896         struct ib_uverbs_poll_cq_resp *resp;
 897         struct ib_cq                  *cq;
 898         struct ib_wc                  *wc;
 899         int                            ret = 0;
 900         int                            i;
 901         int                            rsize;
 902
 903         if (copy_from_user(&cmd, buf, sizeof cmd))
 904                 return -EFAULT;
 905
 906         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 907         if (!wc)
 908                 return -ENOMEM;
 909
 910         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 911         resp = kmalloc(rsize, GFP_KERNEL);
 912         if (!resp) {
 913                 ret = -ENOMEM;
 914                 goto out_wc;
 915         }
 916
 917         cq = idr_read_cq(cmd.cq_handle, file->ucontext);
 918         if (!cq) {
 919                 ret = -EINVAL;
 920                 goto out;
 921         }
 922
 923         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 924
 925         put_cq_read(cq);
 926
 927         for (i = 0; i < resp->count; i++) {
 928                 resp->wc[i].wr_id          = wc[i].wr_id;
 929                 resp->wc[i].status         = wc[i].status;
 930                 resp->wc[i].opcode         = wc[i].opcode;
 931                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 932                 resp->wc[i].byte_len       = wc[i].byte_len;
 933                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 934                 resp->wc[i].qp_num         = wc[i].qp_num;
 935                 resp->wc[i].src_qp         = wc[i].src_qp;
 936                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 937                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 938                 resp->wc[i].slid           = wc[i].slid;
 939                 resp->wc[i].sl             = wc[i].sl;
 940                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 941                 resp->wc[i].port_num       = wc[i].port_num;
 942         }
 943
 944         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 945                 ret = -EFAULT;
 946
 947 out:
 948         kfree(resp);
 949
 950 out_wc:
 951         kfree(wc);
 952         return ret ? ret : in_len;
 953 }
 954
 955 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 956                                 const char __user *buf, int in_len,
 957                                 int out_len)
 958 {
 959         struct ib_uverbs_req_notify_cq cmd;
 960         struct ib_cq                  *cq;
 961
 962         if (copy_from_user(&cmd, buf, sizeof cmd))
 963                 return -EFAULT;
 964
 965         cq = idr_read_cq(cmd.cq_handle, file->ucontext);
 966         if (!cq)
 967                 return -EINVAL;
 968
 969         ib_req_notify_cq(cq, cmd.solicited_only ?
 970                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 971
 972         put_cq_read(cq);
 973
 974         return in_len;
 975 }
 976
 977 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 978                              const char __user *buf, int in_len,
 979                              int out_len)
 980 {
 981         struct ib_uverbs_destroy_cq      cmd;
 982         struct ib_uverbs_destroy_cq_resp resp;
 983         struct ib_uobject               *uobj;
 984         struct ib_cq                    *cq;
 985         struct ib_ucq_object            *obj;
 986         struct ib_uverbs_event_file     *ev_file;
 987         int                              ret = -EINVAL;
 988
 989         if (copy_from_user(&cmd, buf, sizeof cmd))
 990                 return -EFAULT;
 991
 992         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 993         if (!uobj)
 994                 return -EINVAL;
 995         cq      = uobj->object;
 996         ev_file = cq->cq_context;
 997         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
 998
 999         ret = ib_destroy_cq(cq);
1000         if (!ret)
1001                 uobj->live = 0;
1002
1003         put_uobj_write(uobj);
1004
1005         if (ret)
1006                 return ret;
1007
1008         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1009
1010         mutex_lock(&file->mutex);
1011         list_del(&uobj->list);
1012         mutex_unlock(&file->mutex);
1013
1014         ib_uverbs_release_ucq(file, ev_file, obj);
1015
1016         memset(&resp, 0, sizeof resp);
1017         resp.comp_events_reported  = obj->comp_events_reported;
1018         resp.async_events_reported = obj->async_events_reported;
1019
1020         put_uobj(uobj);
1021
1022         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1023                          &resp, sizeof resp))
1024                 return -EFAULT;
1025
1026         return in_len;
1027 }
1028
1029 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1030                             const char __user *buf, int in_len,
1031                             int out_len)
1032 {
1033         struct ib_uverbs_create_qp      cmd;
1034         struct ib_uverbs_create_qp_resp resp;
1035         struct ib_udata                 udata;
1036         struct ib_uqp_object           *obj;
1037         struct ib_pd                   *pd;
1038         struct ib_cq                   *scq, *rcq;
1039         struct ib_srq                  *srq;
1040         struct ib_qp                   *qp;
1041         struct ib_qp_init_attr          attr;
1042         int ret;
1043
1044         if (out_len < sizeof resp)
1045                 return -ENOSPC;
1046
1047         if (copy_from_user(&cmd, buf, sizeof cmd))
1048                 return -EFAULT;
1049
1050         INIT_UDATA(&udata, buf + sizeof cmd,
1051                    (unsigned long) cmd.response + sizeof resp,
1052                    in_len - sizeof cmd, out_len - sizeof resp);
1053
1054         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1055         if (!obj)
1056                 return -ENOMEM;
1057
1058         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1059         down_write(&obj->uevent.uobject.mutex);
1060
1061         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1062         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1063         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext);
1064         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1065                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext);
1066
1067         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1068                 ret = -EINVAL;
1069                 goto err_put;
1070         }
1071
1072         attr.event_handler = ib_uverbs_qp_event_handler;
1073         attr.qp_context    = file;
1074         attr.send_cq       = scq;
1075         attr.recv_cq       = rcq;
1076         attr.srq           = srq;
1077         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1078         attr.qp_type       = cmd.qp_type;
1079
1080         attr.cap.max_send_wr     = cmd.max_send_wr;
1081         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1082         attr.cap.max_send_sge    = cmd.max_send_sge;
1083         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1084         attr.cap.max_inline_data = cmd.max_inline_data;
1085
1086         obj->uevent.events_reported     = 0;
1087         INIT_LIST_HEAD(&obj->uevent.event_list);
1088         INIT_LIST_HEAD(&obj->mcast_list);
1089
1090         qp = pd->device->create_qp(pd, &attr, &udata);
1091         if (IS_ERR(qp)) {
1092                 ret = PTR_ERR(qp);
1093                 goto err_put;
1094         }
1095
1096         qp->device        = pd->device;
1097         qp->pd            = pd;
1098         qp->send_cq       = attr.send_cq;
1099         qp->recv_cq       = attr.recv_cq;
1100         qp->srq           = attr.srq;
1101         qp->uobject       = &obj->uevent.uobject;
1102         qp->event_handler = attr.event_handler;
1103         qp->qp_context    = attr.qp_context;
1104         qp->qp_type       = attr.qp_type;
1105         atomic_inc(&pd->usecnt);
1106         atomic_inc(&attr.send_cq->usecnt);
1107         atomic_inc(&attr.recv_cq->usecnt);
1108         if (attr.srq)
1109                 atomic_inc(&attr.srq->usecnt);
1110
1111         obj->uevent.uobject.object = qp;
1112         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1113         if (ret)
1114                 goto err_destroy;
1115
1116         memset(&resp, 0, sizeof resp);
1117         resp.qpn             = qp->qp_num;
1118         resp.qp_handle       = obj->uevent.uobject.id;
1119         resp.max_recv_sge    = attr.cap.max_recv_sge;
1120         resp.max_send_sge    = attr.cap.max_send_sge;
1121         resp.max_recv_wr     = attr.cap.max_recv_wr;
1122         resp.max_send_wr     = attr.cap.max_send_wr;
1123         resp.max_inline_data = attr.cap.max_inline_data;
1124
1125         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1126                          &resp, sizeof resp)) {
1127                 ret = -EFAULT;
1128                 goto err_copy;
1129         }
1130
1131         put_pd_read(pd);
1132         put_cq_read(scq);
1133         if (rcq != scq)
1134                 put_cq_read(rcq);
1135         if (srq)
1136                 put_srq_read(srq);
1137
1138         mutex_lock(&file->mutex);
1139         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1140         mutex_unlock(&file->mutex);
1141
1142         obj->uevent.uobject.live = 1;
1143
1144         up_write(&obj->uevent.uobject.mutex);
1145
1146         return in_len;
1147
1148 err_copy:
1149         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1150
1151 err_destroy:
1152         ib_destroy_qp(qp);
1153
1154 err_put:
1155         if (pd)
1156                 put_pd_read(pd);
1157         if (scq)
1158                 put_cq_read(scq);
1159         if (rcq && rcq != scq)
1160                 put_cq_read(rcq);
1161         if (srq)
1162                 put_srq_read(srq);
1163
1164         put_uobj_write(&obj->uevent.uobject);
1165         return ret;
1166 }
1167
1168 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1169                            const char __user *buf, int in_len,
1170                            int out_len)
1171 {
1172         struct ib_uverbs_query_qp      cmd;
1173         struct ib_uverbs_query_qp_resp resp;
1174         struct ib_qp                   *qp;
1175         struct ib_qp_attr              *attr;
1176         struct ib_qp_init_attr         *init_attr;
1177         int                            ret;
1178
1179         if (copy_from_user(&cmd, buf, sizeof cmd))
1180                 return -EFAULT;
1181
1182         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1183         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1184         if (!attr || !init_attr) {
1185                 ret = -ENOMEM;
1186                 goto out;
1187         }
1188
1189         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1190         if (!qp) {
1191                 ret = -EINVAL;
1192                 goto out;
1193         }
1194
1195         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1196
1197         put_qp_read(qp);
1198
1199         if (ret)
1200                 goto out;
1201
1202         memset(&resp, 0, sizeof resp);
1203
1204         resp.qp_state               = attr->qp_state;
1205         resp.cur_qp_state           = attr->cur_qp_state;
1206         resp.path_mtu               = attr->path_mtu;
1207         resp.path_mig_state         = attr->path_mig_state;
1208         resp.qkey                   = attr->qkey;
1209         resp.rq_psn                 = attr->rq_psn;
1210         resp.sq_psn                 = attr->sq_psn;
1211         resp.dest_qp_num            = attr->dest_qp_num;
1212         resp.qp_access_flags        = attr->qp_access_flags;
1213         resp.pkey_index             = attr->pkey_index;
1214         resp.alt_pkey_index         = attr->alt_pkey_index;
1215         resp.en_sqd_async_notify    = attr->en_sqd_async_notify;
1216         resp.max_rd_atomic          = attr->max_rd_atomic;
1217         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1218         resp.min_rnr_timer          = attr->min_rnr_timer;
1219         resp.port_num               = attr->port_num;
1220         resp.timeout                = attr->timeout;
1221         resp.retry_cnt              = attr->retry_cnt;
1222         resp.rnr_retry              = attr->rnr_retry;
1223         resp.alt_port_num           = attr->alt_port_num;
1224         resp.alt_timeout            = attr->alt_timeout;
1225
1226         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1227         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1228         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1229         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1230         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1231         resp.dest.dlid              = attr->ah_attr.dlid;
1232         resp.dest.sl                = attr->ah_attr.sl;
1233         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1234         resp.dest.static_rate       = attr->ah_attr.static_rate;
1235         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1236         resp.dest.port_num          = attr->ah_attr.port_num;
1237
1238         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1239         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1240         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1241         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1242         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1243         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1244         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1245         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1246         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1247         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1248         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1249
1250         resp.max_send_wr            = init_attr->cap.max_send_wr;
1251         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1252         resp.max_send_sge           = init_attr->cap.max_send_sge;
1253         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1254         resp.max_inline_data        = init_attr->cap.max_inline_data;
1255         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1256
1257         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1258                          &resp, sizeof resp))
1259                 ret = -EFAULT;
1260
1261 out:
1262         kfree(attr);
1263         kfree(init_attr);
1264
1265         return ret ? ret : in_len;
1266 }
1267
1268 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1269                             const char __user *buf, int in_len,
1270                             int out_len)
1271 {
1272         struct ib_uverbs_modify_qp cmd;
1273         struct ib_qp              *qp;
1274         struct ib_qp_attr         *attr;
1275         int                        ret;
1276
1277         if (copy_from_user(&cmd, buf, sizeof cmd))
1278                 return -EFAULT;
1279
1280         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1281         if (!attr)
1282                 return -ENOMEM;
1283
1284         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1285         if (!qp) {
1286                 ret = -EINVAL;
1287                 goto out;
1288         }
1289
1290         attr->qp_state            = cmd.qp_state;
1291         attr->cur_qp_state        = cmd.cur_qp_state;
1292         attr->path_mtu            = cmd.path_mtu;
1293         attr->path_mig_state      = cmd.path_mig_state;
1294         attr->qkey                = cmd.qkey;
1295         attr->rq_psn              = cmd.rq_psn;
1296         attr->sq_psn              = cmd.sq_psn;
1297         attr->dest_qp_num         = cmd.dest_qp_num;
1298         attr->qp_access_flags     = cmd.qp_access_flags;
1299         attr->pkey_index          = cmd.pkey_index;
1300         attr->alt_pkey_index      = cmd.alt_pkey_index;
1301         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1302         attr->max_rd_atomic       = cmd.max_rd_atomic;
1303         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1304         attr->min_rnr_timer       = cmd.min_rnr_timer;
1305         attr->port_num            = cmd.port_num;
1306         attr->timeout             = cmd.timeout;
1307         attr->retry_cnt           = cmd.retry_cnt;
1308         attr->rnr_retry           = cmd.rnr_retry;
1309         attr->alt_port_num        = cmd.alt_port_num;
1310         attr->alt_timeout         = cmd.alt_timeout;
1311
1312         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1313         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1314         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1315         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1316         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1317         attr->ah_attr.dlid                  = cmd.dest.dlid;
1318         attr->ah_attr.sl                    = cmd.dest.sl;
1319         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1320         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1321         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1322         attr->ah_attr.port_num              = cmd.dest.port_num;
1323
1324         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1325         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1326         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1327         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1328         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1329         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1330         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1331         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1332         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1333         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1334         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1335
1336         ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1337
1338         put_qp_read(qp);
1339
1340         if (ret)
1341                 goto out;
1342
1343         ret = in_len;
1344
1345 out:
1346         kfree(attr);
1347
1348         return ret;
1349 }
1350
1351 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1352                              const char __user *buf, int in_len,
1353                              int out_len)
1354 {
1355         struct ib_uverbs_destroy_qp      cmd;
1356         struct ib_uverbs_destroy_qp_resp resp;
1357         struct ib_uobject               *uobj;
1358         struct ib_qp                    *qp;
1359         struct ib_uqp_object            *obj;
1360         int                              ret = -EINVAL;
1361
1362         if (copy_from_user(&cmd, buf, sizeof cmd))
1363                 return -EFAULT;
1364
1365         memset(&resp, 0, sizeof resp);
1366
1367         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1368         if (!uobj)
1369                 return -EINVAL;
1370         qp  = uobj->object;
1371         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1372
1373         if (!list_empty(&obj->mcast_list)) {
1374                 put_uobj_write(uobj);
1375                 return -EBUSY;
1376         }
1377
1378         ret = ib_destroy_qp(qp);
1379         if (!ret)
1380                 uobj->live = 0;
1381
1382         put_uobj_write(uobj);
1383
1384         if (ret)
1385                 return ret;
1386
1387         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1388
1389         mutex_lock(&file->mutex);
1390         list_del(&uobj->list);
1391         mutex_unlock(&file->mutex);
1392
1393         ib_uverbs_release_uevent(file, &obj->uevent);
1394
1395         resp.events_reported = obj->uevent.events_reported;
1396
1397         put_uobj(uobj);
1398
1399         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1400                          &resp, sizeof resp))
1401                 return -EFAULT;
1402
1403         return in_len;
1404 }
1405
1406 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1407                             const char __user *buf, int in_len,
1408                             int out_len)
1409 {
1410         struct ib_uverbs_post_send      cmd;
1411         struct ib_uverbs_post_send_resp resp;
1412         struct ib_uverbs_send_wr       *user_wr;
1413         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1414         struct ib_qp                   *qp;
1415         int                             i, sg_ind;
1416         int                             is_ud;
1417         ssize_t                         ret = -EINVAL;
1418
1419         if (copy_from_user(&cmd, buf, sizeof cmd))
1420                 return -EFAULT;
1421
1422         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1423             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1424                 return -EINVAL;
1425
1426         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1427                 return -EINVAL;
1428
1429         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1430         if (!user_wr)
1431                 return -ENOMEM;
1432
1433         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1434         if (!qp)
1435                 goto out;
1436
1437         is_ud = qp->qp_type == IB_QPT_UD;
1438         sg_ind = 0;
1439         last = NULL;
1440         for (i = 0; i < cmd.wr_count; ++i) {
1441                 if (copy_from_user(user_wr,
1442                                    buf + sizeof cmd + i * cmd.wqe_size,
1443                                    cmd.wqe_size)) {
1444                         ret = -EFAULT;
1445                         goto out_put;
1446                 }
1447
1448                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1449                         ret = -EINVAL;
1450                         goto out_put;
1451                 }
1452
1453                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1454                                user_wr->num_sge * sizeof (struct ib_sge),
1455                                GFP_KERNEL);
1456                 if (!next) {
1457                         ret = -ENOMEM;
1458                         goto out_put;
1459                 }
1460
1461                 if (!last)
1462                         wr = next;
1463                 else
1464                         last->next = next;
1465                 last = next;
1466
1467                 next->next       = NULL;
1468                 next->wr_id      = user_wr->wr_id;
1469                 next->num_sge    = user_wr->num_sge;
1470                 next->opcode     = user_wr->opcode;
1471                 next->send_flags = user_wr->send_flags;
1472                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1473
1474                 if (is_ud) {
1475                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1476                                                      file->ucontext);
1477                         if (!next->wr.ud.ah) {
1478                                 ret = -EINVAL;
1479                                 goto out_put;
1480                         }
1481                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1482                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1483                 } else {
1484                         switch (next->opcode) {
1485                         case IB_WR_RDMA_WRITE:
1486                         case IB_WR_RDMA_WRITE_WITH_IMM:
1487                         case IB_WR_RDMA_READ:
1488                                 next->wr.rdma.remote_addr =
1489                                         user_wr->wr.rdma.remote_addr;
1490                                 next->wr.rdma.rkey        =
1491                                         user_wr->wr.rdma.rkey;
1492                                 break;
1493                         case IB_WR_ATOMIC_CMP_AND_SWP:
1494                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1495                                 next->wr.atomic.remote_addr =
1496                                         user_wr->wr.atomic.remote_addr;
1497                                 next->wr.atomic.compare_add =
1498                                         user_wr->wr.atomic.compare_add;
1499                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1500                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1501                                 break;
1502                         default:
1503                                 break;
1504                         }
1505                 }
1506
1507                 if (next->num_sge) {
1508                         next->sg_list = (void *) next +
1509                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1510                         if (copy_from_user(next->sg_list,
1511                                            buf + sizeof cmd +
1512                                            cmd.wr_count * cmd.wqe_size +
1513                                            sg_ind * sizeof (struct ib_sge),
1514                                            next->num_sge * sizeof (struct ib_sge))) {
1515                                 ret = -EFAULT;
1516                                 goto out_put;
1517                         }
1518                         sg_ind += next->num_sge;
1519                 } else
1520                         next->sg_list = NULL;
1521         }
1522
1523         resp.bad_wr = 0;
1524         ret = qp->device->post_send(qp, wr, &bad_wr);
1525         if (ret)
1526                 for (next = wr; next; next = next->next) {
1527                         ++resp.bad_wr;
1528                         if (next == bad_wr)
1529                                 break;
1530                 }
1531
1532         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1533                          &resp, sizeof resp))
1534                 ret = -EFAULT;
1535
1536 out_put:
1537         put_qp_read(qp);
1538
1539         while (wr) {
1540                 if (is_ud && wr->wr.ud.ah)
1541                         put_ah_read(wr->wr.ud.ah);
1542                 next = wr->next;
1543                 kfree(wr);
1544                 wr = next;
1545         }
1546
1547 out:
1548         kfree(user_wr);
1549
1550         return ret ? ret : in_len;
1551 }
1552
1553 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1554                                                     int in_len,
1555                                                     u32 wr_count,
1556                                                     u32 sge_count,
1557                                                     u32 wqe_size)
1558 {
1559         struct ib_uverbs_recv_wr *user_wr;
1560         struct ib_recv_wr        *wr = NULL, *last, *next;
1561         int                       sg_ind;
1562         int                       i;
1563         int                       ret;
1564
1565         if (in_len < wqe_size * wr_count +
1566             sge_count * sizeof (struct ib_uverbs_sge))
1567                 return ERR_PTR(-EINVAL);
1568
1569         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1570                 return ERR_PTR(-EINVAL);
1571
1572         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1573         if (!user_wr)
1574                 return ERR_PTR(-ENOMEM);
1575
1576         sg_ind = 0;
1577         last = NULL;
1578         for (i = 0; i < wr_count; ++i) {
1579                 if (copy_from_user(user_wr, buf + i * wqe_size,
1580                                    wqe_size)) {
1581                         ret = -EFAULT;
1582                         goto err;
1583                 }
1584
1585                 if (user_wr->num_sge + sg_ind > sge_count) {
1586                         ret = -EINVAL;
1587                         goto err;
1588                 }
1589
1590                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1591                                user_wr->num_sge * sizeof (struct ib_sge),
1592                                GFP_KERNEL);
1593                 if (!next) {
1594                         ret = -ENOMEM;
1595                         goto err;
1596                 }
1597
1598                 if (!last)
1599                         wr = next;
1600                 else
1601                         last->next = next;
1602                 last = next;
1603
1604                 next->next       = NULL;
1605                 next->wr_id      = user_wr->wr_id;
1606                 next->num_sge    = user_wr->num_sge;
1607
1608                 if (next->num_sge) {
1609                         next->sg_list = (void *) next +
1610                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1611                         if (copy_from_user(next->sg_list,
1612                                            buf + wr_count * wqe_size +
1613                                            sg_ind * sizeof (struct ib_sge),
1614                                            next->num_sge * sizeof (struct ib_sge))) {
1615                                 ret = -EFAULT;
1616                                 goto err;
1617                         }
1618                         sg_ind += next->num_sge;
1619                 } else
1620                         next->sg_list = NULL;
1621         }
1622
1623         kfree(user_wr);
1624         return wr;
1625
1626 err:
1627         kfree(user_wr);
1628
1629         while (wr) {
1630                 next = wr->next;
1631                 kfree(wr);
1632                 wr = next;
1633         }
1634
1635         return ERR_PTR(ret);
1636 }
1637
1638 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1639                             const char __user *buf, int in_len,
1640                             int out_len)
1641 {
1642         struct ib_uverbs_post_recv      cmd;
1643         struct ib_uverbs_post_recv_resp resp;
1644         struct ib_recv_wr              *wr, *next, *bad_wr;
1645         struct ib_qp                   *qp;
1646         ssize_t                         ret = -EINVAL;
1647
1648         if (copy_from_user(&cmd, buf, sizeof cmd))
1649                 return -EFAULT;
1650
1651         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1652                                        in_len - sizeof cmd, cmd.wr_count,
1653                                        cmd.sge_count, cmd.wqe_size);
1654         if (IS_ERR(wr))
1655                 return PTR_ERR(wr);
1656
1657         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1658         if (!qp)
1659                 goto out;
1660
1661         resp.bad_wr = 0;
1662         ret = qp->device->post_recv(qp, wr, &bad_wr);
1663
1664         put_qp_read(qp);
1665
1666         if (ret)
1667                 for (next = wr; next; next = next->next) {
1668                         ++resp.bad_wr;
1669                         if (next == bad_wr)
1670                                 break;
1671                 }
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
1724         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1725                          &resp, sizeof resp))
1726                 ret = -EFAULT;
1727
1728 out:
1729         while (wr) {
1730                 next = wr->next;
1731                 kfree(wr);
1732                 wr = next;
1733         }
1734
1735         return ret ? ret : in_len;
1736 }
1737
1738 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1739                             const char __user *buf, int in_len,
1740                             int out_len)
1741 {
1742         struct ib_uverbs_create_ah       cmd;
1743         struct ib_uverbs_create_ah_resp  resp;
1744         struct ib_uobject               *uobj;
1745         struct ib_pd                    *pd;
1746         struct ib_ah                    *ah;
1747         struct ib_ah_attr               attr;
1748         int ret;
1749
1750         if (out_len < sizeof resp)
1751                 return -ENOSPC;
1752
1753         if (copy_from_user(&cmd, buf, sizeof cmd))
1754                 return -EFAULT;
1755
1756         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1757         if (!uobj)
1758                 return -ENOMEM;
1759
1760         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1761         down_write(&uobj->mutex);
1762
1763         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1764         if (!pd) {
1765                 ret = -EINVAL;
1766                 goto err;
1767         }
1768
1769         attr.dlid              = cmd.attr.dlid;
1770         attr.sl                = cmd.attr.sl;
1771         attr.src_path_bits     = cmd.attr.src_path_bits;
1772         attr.static_rate       = cmd.attr.static_rate;
1773         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1774         attr.port_num          = cmd.attr.port_num;
1775         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1776         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1777         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1778         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1779         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1780
1781         ah = ib_create_ah(pd, &attr);
1782         if (IS_ERR(ah)) {
1783                 ret = PTR_ERR(ah);
1784                 goto err_put;
1785         }
1786
1787         ah->uobject  = uobj;
1788         uobj->object = ah;
1789
1790         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1791         if (ret)
1792                 goto err_destroy;
1793
1794         resp.ah_handle = uobj->id;
1795
1796         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1797                          &resp, sizeof resp)) {
1798                 ret = -EFAULT;
1799                 goto err_copy;
1800         }
1801
1802         put_pd_read(pd);
1803
1804         mutex_lock(&file->mutex);
1805         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1806         mutex_unlock(&file->mutex);
1807
1808         uobj->live = 1;
1809
1810         up_write(&uobj->mutex);
1811
1812         return in_len;
1813
1814 err_copy:
1815         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1816
1817 err_destroy:
1818         ib_destroy_ah(ah);
1819
1820 err_put:
1821         put_pd_read(pd);
1822
1823 err:
1824         put_uobj_write(uobj);
1825         return ret;
1826 }
1827
1828 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1829                              const char __user *buf, int in_len, int out_len)
1830 {
1831         struct ib_uverbs_destroy_ah cmd;
1832         struct ib_ah               *ah;
1833         struct ib_uobject          *uobj;
1834         int                         ret;
1835
1836         if (copy_from_user(&cmd, buf, sizeof cmd))
1837                 return -EFAULT;
1838
1839         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1840         if (!uobj)
1841                 return -EINVAL;
1842         ah = uobj->object;
1843
1844         ret = ib_destroy_ah(ah);
1845         if (!ret)
1846                 uobj->live = 0;
1847
1848         put_uobj_write(uobj);
1849
1850         if (ret)
1851                 return ret;
1852
1853         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1854
1855         mutex_lock(&file->mutex);
1856         list_del(&uobj->list);
1857         mutex_unlock(&file->mutex);
1858
1859         put_uobj(uobj);
1860
1861         return in_len;
1862 }
1863
1864 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1865                                const char __user *buf, int in_len,
1866                                int out_len)
1867 {
1868         struct ib_uverbs_attach_mcast cmd;
1869         struct ib_qp                 *qp;
1870         struct ib_uqp_object         *obj;
1871         struct ib_uverbs_mcast_entry *mcast;
1872         int                           ret;
1873
1874         if (copy_from_user(&cmd, buf, sizeof cmd))
1875                 return -EFAULT;
1876
1877         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1878         if (!qp)
1879                 return -EINVAL;
1880
1881         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1882
1883         list_for_each_entry(mcast, &obj->mcast_list, list)
1884                 if (cmd.mlid == mcast->lid &&
1885                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1886                         ret = 0;
1887                         goto out_put;
1888                 }
1889
1890         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1891         if (!mcast) {
1892                 ret = -ENOMEM;
1893                 goto out_put;
1894         }
1895
1896         mcast->lid = cmd.mlid;
1897         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1898
1899         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1900         if (!ret)
1901                 list_add_tail(&mcast->list, &obj->mcast_list);
1902         else
1903                 kfree(mcast);
1904
1905 out_put:
1906         put_qp_read(qp);
1907
1908         return ret ? ret : in_len;
1909 }
1910
1911 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1912                                const char __user *buf, int in_len,
1913                                int out_len)
1914 {
1915         struct ib_uverbs_detach_mcast cmd;
1916         struct ib_uqp_object         *obj;
1917         struct ib_qp                 *qp;
1918         struct ib_uverbs_mcast_entry *mcast;
1919         int                           ret = -EINVAL;
1920
1921         if (copy_from_user(&cmd, buf, sizeof cmd))
1922                 return -EFAULT;
1923
1924         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1925         if (!qp)
1926                 return -EINVAL;
1927
1928         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1929         if (ret)
1930                 goto out_put;
1931
1932         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1933
1934         list_for_each_entry(mcast, &obj->mcast_list, list)
1935                 if (cmd.mlid == mcast->lid &&
1936                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1937                         list_del(&mcast->list);
1938                         kfree(mcast);
1939                         break;
1940                 }
1941
1942 out_put:
1943         put_qp_read(qp);
1944
1945         return ret ? ret : in_len;
1946 }
1947
1948 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1949                              const char __user *buf, int in_len,
1950                              int out_len)
1951 {
1952         struct ib_uverbs_create_srq      cmd;
1953         struct ib_uverbs_create_srq_resp resp;
1954         struct ib_udata                  udata;
1955         struct ib_uevent_object         *obj;
1956         struct ib_pd                    *pd;
1957         struct ib_srq                   *srq;
1958         struct ib_srq_init_attr          attr;
1959         int ret;
1960
1961         if (out_len < sizeof resp)
1962                 return -ENOSPC;
1963
1964         if (copy_from_user(&cmd, buf, sizeof cmd))
1965                 return -EFAULT;
1966
1967         INIT_UDATA(&udata, buf + sizeof cmd,
1968                    (unsigned long) cmd.response + sizeof resp,
1969                    in_len - sizeof cmd, out_len - sizeof resp);
1970
1971         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1972         if (!obj)
1973                 return -ENOMEM;
1974
1975         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1976         down_write(&obj->uobject.mutex);
1977
1978         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1979         if (!pd) {
1980                 ret = -EINVAL;
1981                 goto err;
1982         }
1983
1984         attr.event_handler  = ib_uverbs_srq_event_handler;
1985         attr.srq_context    = file;
1986         attr.attr.max_wr    = cmd.max_wr;
1987         attr.attr.max_sge   = cmd.max_sge;
1988         attr.attr.srq_limit = cmd.srq_limit;
1989
1990         obj->events_reported     = 0;
1991         INIT_LIST_HEAD(&obj->event_list);
1992
1993         srq = pd->device->create_srq(pd, &attr, &udata);
1994         if (IS_ERR(srq)) {
1995                 ret = PTR_ERR(srq);
1996                 goto err_put;
1997         }
1998
1999         srq->device        = pd->device;
2000         srq->pd            = pd;
2001         srq->uobject       = &obj->uobject;
2002         srq->event_handler = attr.event_handler;
2003         srq->srq_context   = attr.srq_context;
2004         atomic_inc(&pd->usecnt);
2005         atomic_set(&srq->usecnt, 0);
2006
2007         obj->uobject.object = srq;
2008         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2009         if (ret)
2010                 goto err_destroy;
2011
2012         memset(&resp, 0, sizeof resp);
2013         resp.srq_handle = obj->uobject.id;
2014         resp.max_wr     = attr.attr.max_wr;
2015         resp.max_sge    = attr.attr.max_sge;
2016
2017         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2018                          &resp, sizeof resp)) {
2019                 ret = -EFAULT;
2020                 goto err_copy;
2021         }
2022
2023         put_pd_read(pd);
2024
2025         mutex_lock(&file->mutex);
2026         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2027         mutex_unlock(&file->mutex);
2028
2029         obj->uobject.live = 1;
2030
2031         up_write(&obj->uobject.mutex);
2032
2033         return in_len;
2034
2035 err_copy:
2036         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2037
2038 err_destroy:
2039         ib_destroy_srq(srq);
2040
2041 err_put:
2042         put_pd_read(pd);
2043
2044 err:
2045         put_uobj_write(&obj->uobject);
2046         return ret;
2047 }
2048
2049 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2050                              const char __user *buf, int in_len,
2051                              int out_len)
2052 {
2053         struct ib_uverbs_modify_srq cmd;
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         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2062         if (!srq)
2063                 return -EINVAL;
2064
2065         attr.max_wr    = cmd.max_wr;
2066         attr.srq_limit = cmd.srq_limit;
2067
2068         ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
2069
2070         put_srq_read(srq);
2071
2072         return ret ? ret : in_len;
2073 }
2074
2075 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2076                             const char __user *buf,
2077                             int in_len, int out_len)
2078 {
2079         struct ib_uverbs_query_srq      cmd;
2080         struct ib_uverbs_query_srq_resp resp;
2081         struct ib_srq_attr              attr;
2082         struct ib_srq                   *srq;
2083         int                             ret;
2084
2085         if (out_len < sizeof resp)
2086                 return -ENOSPC;
2087
2088         if (copy_from_user(&cmd, buf, sizeof cmd))
2089                 return -EFAULT;
2090
2091         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2092         if (!srq)
2093                 return -EINVAL;
2094
2095         ret = ib_query_srq(srq, &attr);
2096
2097         put_srq_read(srq);
2098
2099         if (ret)
2100                 return ret;
2101
2102         memset(&resp, 0, sizeof resp);
2103
2104         resp.max_wr    = attr.max_wr;
2105         resp.max_sge   = attr.max_sge;
2106         resp.srq_limit = attr.srq_limit;
2107
2108         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2109                          &resp, sizeof resp))
2110                 return -EFAULT;
2111
2112         return in_len;
2113 }
2114
2115 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2116                               const char __user *buf, int in_len,
2117                               int out_len)
2118 {
2119         struct ib_uverbs_destroy_srq      cmd;
2120         struct ib_uverbs_destroy_srq_resp resp;
2121         struct ib_uobject                *uobj;
2122         struct ib_srq                    *srq;
2123         struct ib_uevent_object          *obj;
2124         int                               ret = -EINVAL;
2125
2126         if (copy_from_user(&cmd, buf, sizeof cmd))
2127                 return -EFAULT;
2128
2129         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2130         if (!uobj)
2131                 return -EINVAL;
2132         srq = uobj->object;
2133         obj = container_of(uobj, struct ib_uevent_object, uobject);
2134
2135         ret = ib_destroy_srq(srq);
2136         if (!ret)
2137                 uobj->live = 0;
2138
2139         put_uobj_write(uobj);
2140
2141         if (ret)
2142                 return ret;
2143
2144         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2145
2146         mutex_lock(&file->mutex);
2147         list_del(&uobj->list);
2148         mutex_unlock(&file->mutex);
2149
2150         ib_uverbs_release_uevent(file, obj);
2151
2152         memset(&resp, 0, sizeof resp);
2153         resp.events_reported = obj->events_reported;
2154
2155         put_uobj(uobj);
2156
2157         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2158                          &resp, sizeof resp))
2159                 ret = -EFAULT;
2160
2161         return ret ? ret : in_len;
2162 }