SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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  * $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, int nested)
 159 {
 160         struct ib_uobject *uobj;
 161
 162         uobj = __idr_get_uobj(idr, id, context);
 163         if (!uobj)
 164                 return NULL;
 165
 166         if (nested)
 167                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 168         else
 169                 down_read(&uobj->mutex);
 170         if (!uobj->live) {
 171                 put_uobj_read(uobj);
 172                 return NULL;
 173         }
 174
 175         return uobj;
 176 }
 177
 178 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 179                                          struct ib_ucontext *context)
 180 {
 181         struct ib_uobject *uobj;
 182
 183         uobj = __idr_get_uobj(idr, id, context);
 184         if (!uobj)
 185                 return NULL;
 186
 187         down_write(&uobj->mutex);
 188         if (!uobj->live) {
 189                 put_uobj_write(uobj);
 190                 return NULL;
 191         }
 192
 193         return uobj;
 194 }
 195
 196 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 197                           int nested)
 198 {
 199         struct ib_uobject *uobj;
 200
 201         uobj = idr_read_uobj(idr, id, context, nested);
 202         return uobj ? uobj->object : NULL;
 203 }
 204
 205 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 206 {
 207         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 208 }
 209
 210 static void put_pd_read(struct ib_pd *pd)
 211 {
 212         put_uobj_read(pd->uobject);
 213 }
 214
 215 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 216 {
 217         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 218 }
 219
 220 static void put_cq_read(struct ib_cq *cq)
 221 {
 222         put_uobj_read(cq->uobject);
 223 }
 224
 225 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 226 {
 227         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 228 }
 229
 230 static void put_ah_read(struct ib_ah *ah)
 231 {
 232         put_uobj_read(ah->uobject);
 233 }
 234
 235 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 236 {
 237         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 238 }
 239
 240 static void put_qp_read(struct ib_qp *qp)
 241 {
 242         put_uobj_read(qp->uobject);
 243 }
 244
 245 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 246 {
 247         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 248 }
 249
 250 static void put_srq_read(struct ib_srq *srq)
 251 {
 252         put_uobj_read(srq->uobject);
 253 }
 254
 255 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 256                               const char __user *buf,
 257                               int in_len, int out_len)
 258 {
 259         struct ib_uverbs_get_context      cmd;
 260         struct ib_uverbs_get_context_resp resp;
 261         struct ib_udata                   udata;
 262         struct ib_device                 *ibdev = file->device->ib_dev;
 263         struct ib_ucontext               *ucontext;
 264         struct file                      *filp;
 265         int ret;
 266
 267         if (out_len < sizeof resp)
 268                 return -ENOSPC;
 269
 270         if (copy_from_user(&cmd, buf, sizeof cmd))
 271                 return -EFAULT;
 272
 273         mutex_lock(&file->mutex);
 274
 275         if (file->ucontext) {
 276                 ret = -EINVAL;
 277                 goto err;
 278         }
 279
 280         INIT_UDATA(&udata, buf + sizeof cmd,
 281                    (unsigned long) cmd.response + sizeof resp,
 282                    in_len - sizeof cmd, out_len - sizeof resp);
 283
 284         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 285         if (IS_ERR(ucontext)) {
 286                 ret = PTR_ERR(file->ucontext);
 287                 goto err;
 288         }
 289
 290         ucontext->device = ibdev;
 291         INIT_LIST_HEAD(&ucontext->pd_list);
 292         INIT_LIST_HEAD(&ucontext->mr_list);
 293         INIT_LIST_HEAD(&ucontext->mw_list);
 294         INIT_LIST_HEAD(&ucontext->cq_list);
 295         INIT_LIST_HEAD(&ucontext->qp_list);
 296         INIT_LIST_HEAD(&ucontext->srq_list);
 297         INIT_LIST_HEAD(&ucontext->ah_list);
 298         ucontext->closing = 0;
 299
 300         resp.num_comp_vectors = file->device->num_comp_vectors;
 301
 302         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 303         if (IS_ERR(filp)) {
 304                 ret = PTR_ERR(filp);
 305                 goto err_free;
 306         }
 307
 308         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 309                          &resp, sizeof resp)) {
 310                 ret = -EFAULT;
 311                 goto err_file;
 312         }
 313
 314         file->async_file = filp->private_data;
 315
 316         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 317                               ib_uverbs_event_handler);
 318         ret = ib_register_event_handler(&file->event_handler);
 319         if (ret)
 320                 goto err_file;
 321
 322         kref_get(&file->async_file->ref);
 323         kref_get(&file->ref);
 324         file->ucontext = ucontext;
 325
 326         fd_install(resp.async_fd, filp);
 327
 328         mutex_unlock(&file->mutex);
 329
 330         return in_len;
 331
 332 err_file:
 333         put_unused_fd(resp.async_fd);
 334         fput(filp);
 335
 336 err_free:
 337         ibdev->dealloc_ucontext(ucontext);
 338
 339 err:
 340         mutex_unlock(&file->mutex);
 341         return ret;
 342 }
 343
 344 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 345                                const char __user *buf,
 346                                int in_len, int out_len)
 347 {
 348         struct ib_uverbs_query_device      cmd;
 349         struct ib_uverbs_query_device_resp resp;
 350         struct ib_device_attr              attr;
 351         int                                ret;
 352
 353         if (out_len < sizeof resp)
 354                 return -ENOSPC;
 355
 356         if (copy_from_user(&cmd, buf, sizeof cmd))
 357                 return -EFAULT;
 358
 359         ret = ib_query_device(file->device->ib_dev, &attr);
 360         if (ret)
 361                 return ret;
 362
 363         memset(&resp, 0, sizeof resp);
 364
 365         resp.fw_ver                    = attr.fw_ver;
 366         resp.node_guid                 = file->device->ib_dev->node_guid;
 367         resp.sys_image_guid            = attr.sys_image_guid;
 368         resp.max_mr_size               = attr.max_mr_size;
 369         resp.page_size_cap             = attr.page_size_cap;
 370         resp.vendor_id                 = attr.vendor_id;
 371         resp.vendor_part_id            = attr.vendor_part_id;
 372         resp.hw_ver                    = attr.hw_ver;
 373         resp.max_qp                    = attr.max_qp;
 374         resp.max_qp_wr                 = attr.max_qp_wr;
 375         resp.device_cap_flags          = attr.device_cap_flags;
 376         resp.max_sge                   = attr.max_sge;
 377         resp.max_sge_rd                = attr.max_sge_rd;
 378         resp.max_cq                    = attr.max_cq;
 379         resp.max_cqe                   = attr.max_cqe;
 380         resp.max_mr                    = attr.max_mr;
 381         resp.max_pd                    = attr.max_pd;
 382         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 383         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 384         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 385         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 386         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 387         resp.atomic_cap                = attr.atomic_cap;
 388         resp.max_ee                    = attr.max_ee;
 389         resp.max_rdd                   = attr.max_rdd;
 390         resp.max_mw                    = attr.max_mw;
 391         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 392         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 393         resp.max_mcast_grp             = attr.max_mcast_grp;
 394         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 395         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 396         resp.max_ah                    = attr.max_ah;
 397         resp.max_fmr                   = attr.max_fmr;
 398         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 399         resp.max_srq                   = attr.max_srq;
 400         resp.max_srq_wr                = attr.max_srq_wr;
 401         resp.max_srq_sge               = attr.max_srq_sge;
 402         resp.max_pkeys                 = attr.max_pkeys;
 403         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 404         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 405
 406         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 407                          &resp, sizeof resp))
 408                 return -EFAULT;
 409
 410         return in_len;
 411 }
 412
 413 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 414                              const char __user *buf,
 415                              int in_len, int out_len)
 416 {
 417         struct ib_uverbs_query_port      cmd;
 418         struct ib_uverbs_query_port_resp resp;
 419         struct ib_port_attr              attr;
 420         int                              ret;
 421
 422         if (out_len < sizeof resp)
 423                 return -ENOSPC;
 424
 425         if (copy_from_user(&cmd, buf, sizeof cmd))
 426                 return -EFAULT;
 427
 428         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 429         if (ret)
 430                 return ret;
 431
 432         memset(&resp, 0, sizeof resp);
 433
 434         resp.state           = attr.state;
 435         resp.max_mtu         = attr.max_mtu;
 436         resp.active_mtu      = attr.active_mtu;
 437         resp.gid_tbl_len     = attr.gid_tbl_len;
 438         resp.port_cap_flags  = attr.port_cap_flags;
 439         resp.max_msg_sz      = attr.max_msg_sz;
 440         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 441         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 442         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 443         resp.lid             = attr.lid;
 444         resp.sm_lid          = attr.sm_lid;
 445         resp.lmc             = attr.lmc;
 446         resp.max_vl_num      = attr.max_vl_num;
 447         resp.sm_sl           = attr.sm_sl;
 448         resp.subnet_timeout  = attr.subnet_timeout;
 449         resp.init_type_reply = attr.init_type_reply;
 450         resp.active_width    = attr.active_width;
 451         resp.active_speed    = attr.active_speed;
 452         resp.phys_state      = attr.phys_state;
 453
 454         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 455                          &resp, sizeof resp))
 456                 return -EFAULT;
 457
 458         return in_len;
 459 }
 460
 461 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 462                            const char __user *buf,
 463                            int in_len, int out_len)
 464 {
 465         struct ib_uverbs_alloc_pd      cmd;
 466         struct ib_uverbs_alloc_pd_resp resp;
 467         struct ib_udata                udata;
 468         struct ib_uobject             *uobj;
 469         struct ib_pd                  *pd;
 470         int                            ret;
 471
 472         if (out_len < sizeof resp)
 473                 return -ENOSPC;
 474
 475         if (copy_from_user(&cmd, buf, sizeof cmd))
 476                 return -EFAULT;
 477
 478         INIT_UDATA(&udata, buf + sizeof cmd,
 479                    (unsigned long) cmd.response + sizeof resp,
 480                    in_len - sizeof cmd, out_len - sizeof resp);
 481
 482         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 483         if (!uobj)
 484                 return -ENOMEM;
 485
 486         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 487         down_write(&uobj->mutex);
 488
 489         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 490                                             file->ucontext, &udata);
 491         if (IS_ERR(pd)) {
 492                 ret = PTR_ERR(pd);
 493                 goto err;
 494         }
 495
 496         pd->device  = file->device->ib_dev;
 497         pd->uobject = uobj;
 498         atomic_set(&pd->usecnt, 0);
 499
 500         uobj->object = pd;
 501         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 502         if (ret)
 503                 goto err_idr;
 504
 505         memset(&resp, 0, sizeof resp);
 506         resp.pd_handle = uobj->id;
 507
 508         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 509                          &resp, sizeof resp)) {
 510                 ret = -EFAULT;
 511                 goto err_copy;
 512         }
 513
 514         mutex_lock(&file->mutex);
 515         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 516         mutex_unlock(&file->mutex);
 517
 518         uobj->live = 1;
 519
 520         up_write(&uobj->mutex);
 521
 522         return in_len;
 523
 524 err_copy:
 525         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 526
 527 err_idr:
 528         ib_dealloc_pd(pd);
 529
 530 err:
 531         put_uobj_write(uobj);
 532         return ret;
 533 }
 534
 535 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 536                              const char __user *buf,
 537                              int in_len, int out_len)
 538 {
 539         struct ib_uverbs_dealloc_pd cmd;
 540         struct ib_uobject          *uobj;
 541         int                         ret;
 542
 543         if (copy_from_user(&cmd, buf, sizeof cmd))
 544                 return -EFAULT;
 545
 546         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 547         if (!uobj)
 548                 return -EINVAL;
 549
 550         ret = ib_dealloc_pd(uobj->object);
 551         if (!ret)
 552                 uobj->live = 0;
 553
 554         put_uobj_write(uobj);
 555
 556         if (ret)
 557                 return ret;
 558
 559         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 560
 561         mutex_lock(&file->mutex);
 562         list_del(&uobj->list);
 563         mutex_unlock(&file->mutex);
 564
 565         put_uobj(uobj);
 566
 567         return in_len;
 568 }
 569
 570 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 571                          const char __user *buf, int in_len,
 572                          int out_len)
 573 {
 574         struct ib_uverbs_reg_mr      cmd;
 575         struct ib_uverbs_reg_mr_resp resp;
 576         struct ib_udata              udata;
 577         struct ib_uobject           *uobj;
 578         struct ib_pd                *pd;
 579         struct ib_mr                *mr;
 580         int                          ret;
 581
 582         if (out_len < sizeof resp)
 583                 return -ENOSPC;
 584
 585         if (copy_from_user(&cmd, buf, sizeof cmd))
 586                 return -EFAULT;
 587
 588         INIT_UDATA(&udata, buf + sizeof cmd,
 589                    (unsigned long) cmd.response + sizeof resp,
 590                    in_len - sizeof cmd, out_len - sizeof resp);
 591
 592         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 593                 return -EINVAL;
 594
 595         /*
 596          * Local write permission is required if remote write or
 597          * remote atomic permission is also requested.
 598          */
 599         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 600             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 601                 return -EINVAL;
 602
 603         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 604         if (!uobj)
 605                 return -ENOMEM;
 606
 607         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 608         down_write(&uobj->mutex);
 609
 610         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 611         if (!pd) {
 612                 ret = -EINVAL;
 613                 goto err_free;
 614         }
 615
 616         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 617                                      cmd.access_flags, &udata);
 618         if (IS_ERR(mr)) {
 619                 ret = PTR_ERR(mr);
 620                 goto err_put;
 621         }
 622
 623         mr->device  = pd->device;
 624         mr->pd      = pd;
 625         mr->uobject = uobj;
 626         atomic_inc(&pd->usecnt);
 627         atomic_set(&mr->usecnt, 0);
 628
 629         uobj->object = mr;
 630         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 631         if (ret)
 632                 goto err_unreg;
 633
 634         memset(&resp, 0, sizeof resp);
 635         resp.lkey      = mr->lkey;
 636         resp.rkey      = mr->rkey;
 637         resp.mr_handle = uobj->id;
 638
 639         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 640                          &resp, sizeof resp)) {
 641                 ret = -EFAULT;
 642                 goto err_copy;
 643         }
 644
 645         put_pd_read(pd);
 646
 647         mutex_lock(&file->mutex);
 648         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 649         mutex_unlock(&file->mutex);
 650
 651         uobj->live = 1;
 652
 653         up_write(&uobj->mutex);
 654
 655         return in_len;
 656
 657 err_copy:
 658         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 659
 660 err_unreg:
 661         ib_dereg_mr(mr);
 662
 663 err_put:
 664         put_pd_read(pd);
 665
 666 err_free:
 667         put_uobj_write(uobj);
 668         return ret;
 669 }
 670
 671 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 672                            const char __user *buf, int in_len,
 673                            int out_len)
 674 {
 675         struct ib_uverbs_dereg_mr cmd;
 676         struct ib_mr             *mr;
 677         struct ib_uobject        *uobj;
 678         int                       ret = -EINVAL;
 679
 680         if (copy_from_user(&cmd, buf, sizeof cmd))
 681                 return -EFAULT;
 682
 683         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 684         if (!uobj)
 685                 return -EINVAL;
 686
 687         mr = uobj->object;
 688
 689         ret = ib_dereg_mr(mr);
 690         if (!ret)
 691                 uobj->live = 0;
 692
 693         put_uobj_write(uobj);
 694
 695         if (ret)
 696                 return ret;
 697
 698         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 699
 700         mutex_lock(&file->mutex);
 701         list_del(&uobj->list);
 702         mutex_unlock(&file->mutex);
 703
 704         put_uobj(uobj);
 705
 706         return in_len;
 707 }
 708
 709 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 710                                       const char __user *buf, int in_len,
 711                                       int out_len)
 712 {
 713         struct ib_uverbs_create_comp_channel       cmd;
 714         struct ib_uverbs_create_comp_channel_resp  resp;
 715         struct file                               *filp;
 716
 717         if (out_len < sizeof resp)
 718                 return -ENOSPC;
 719
 720         if (copy_from_user(&cmd, buf, sizeof cmd))
 721                 return -EFAULT;
 722
 723         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 724         if (IS_ERR(filp))
 725                 return PTR_ERR(filp);
 726
 727         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 728                          &resp, sizeof resp)) {
 729                 put_unused_fd(resp.fd);
 730                 fput(filp);
 731                 return -EFAULT;
 732         }
 733
 734         fd_install(resp.fd, filp);
 735         return in_len;
 736 }
 737
 738 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 739                             const char __user *buf, int in_len,
 740                             int out_len)
 741 {
 742         struct ib_uverbs_create_cq      cmd;
 743         struct ib_uverbs_create_cq_resp resp;
 744         struct ib_udata                 udata;
 745         struct ib_ucq_object           *obj;
 746         struct ib_uverbs_event_file    *ev_file = NULL;
 747         struct ib_cq                   *cq;
 748         int                             ret;
 749
 750         if (out_len < sizeof resp)
 751                 return -ENOSPC;
 752
 753         if (copy_from_user(&cmd, buf, sizeof cmd))
 754                 return -EFAULT;
 755
 756         INIT_UDATA(&udata, buf + sizeof cmd,
 757                    (unsigned long) cmd.response + sizeof resp,
 758                    in_len - sizeof cmd, out_len - sizeof resp);
 759
 760         if (cmd.comp_vector >= file->device->num_comp_vectors)
 761                 return -EINVAL;
 762
 763         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 764         if (!obj)
 765                 return -ENOMEM;
 766
 767         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 768         down_write(&obj->uobject.mutex);
 769
 770         if (cmd.comp_channel >= 0) {
 771                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 772                 if (!ev_file) {
 773                         ret = -EINVAL;
 774                         goto err;
 775                 }
 776         }
 777
 778         obj->uverbs_file           = file;
 779         obj->comp_events_reported  = 0;
 780         obj->async_events_reported = 0;
 781         INIT_LIST_HEAD(&obj->comp_list);
 782         INIT_LIST_HEAD(&obj->async_list);
 783
 784         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 785                                              cmd.comp_vector,
 786                                              file->ucontext, &udata);
 787         if (IS_ERR(cq)) {
 788                 ret = PTR_ERR(cq);
 789                 goto err_file;
 790         }
 791
 792         cq->device        = file->device->ib_dev;
 793         cq->uobject       = &obj->uobject;
 794         cq->comp_handler  = ib_uverbs_comp_handler;
 795         cq->event_handler = ib_uverbs_cq_event_handler;
 796         cq->cq_context    = ev_file;
 797         atomic_set(&cq->usecnt, 0);
 798
 799         obj->uobject.object = cq;
 800         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 801         if (ret)
 802                 goto err_free;
 803
 804         memset(&resp, 0, sizeof resp);
 805         resp.cq_handle = obj->uobject.id;
 806         resp.cqe       = cq->cqe;
 807
 808         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 809                          &resp, sizeof resp)) {
 810                 ret = -EFAULT;
 811                 goto err_copy;
 812         }
 813
 814         mutex_lock(&file->mutex);
 815         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 816         mutex_unlock(&file->mutex);
 817
 818         obj->uobject.live = 1;
 819
 820         up_write(&obj->uobject.mutex);
 821
 822         return in_len;
 823
 824 err_copy:
 825         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 826
 827 err_free:
 828         ib_destroy_cq(cq);
 829
 830 err_file:
 831         if (ev_file)
 832                 ib_uverbs_release_ucq(file, ev_file, obj);
 833
 834 err:
 835         put_uobj_write(&obj->uobject);
 836         return ret;
 837 }
 838
 839 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 840                             const char __user *buf, int in_len,
 841                             int out_len)
 842 {
 843         struct ib_uverbs_resize_cq      cmd;
 844         struct ib_uverbs_resize_cq_resp resp;
 845         struct ib_udata                 udata;
 846         struct ib_cq                    *cq;
 847         int                             ret = -EINVAL;
 848
 849         if (copy_from_user(&cmd, buf, sizeof cmd))
 850                 return -EFAULT;
 851
 852         INIT_UDATA(&udata, buf + sizeof cmd,
 853                    (unsigned long) cmd.response + sizeof resp,
 854                    in_len - sizeof cmd, out_len - sizeof resp);
 855
 856         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 857         if (!cq)
 858                 return -EINVAL;
 859
 860         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 861         if (ret)
 862                 goto out;
 863
 864         resp.cqe = cq->cqe;
 865
 866         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 867                          &resp, sizeof resp.cqe))
 868                 ret = -EFAULT;
 869
 870 out:
 871         put_cq_read(cq);
 872
 873         return ret ? ret : in_len;
 874 }
 875
 876 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 877                           const char __user *buf, int in_len,
 878                           int out_len)
 879 {
 880         struct ib_uverbs_poll_cq       cmd;
 881         struct ib_uverbs_poll_cq_resp *resp;
 882         struct ib_cq                  *cq;
 883         struct ib_wc                  *wc;
 884         int                            ret = 0;
 885         int                            i;
 886         int                            rsize;
 887
 888         if (copy_from_user(&cmd, buf, sizeof cmd))
 889                 return -EFAULT;
 890
 891         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 892         if (!wc)
 893                 return -ENOMEM;
 894
 895         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 896         resp = kmalloc(rsize, GFP_KERNEL);
 897         if (!resp) {
 898                 ret = -ENOMEM;
 899                 goto out_wc;
 900         }
 901
 902         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 903         if (!cq) {
 904                 ret = -EINVAL;
 905                 goto out;
 906         }
 907
 908         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 909
 910         put_cq_read(cq);
 911
 912         for (i = 0; i < resp->count; i++) {
 913                 resp->wc[i].wr_id          = wc[i].wr_id;
 914                 resp->wc[i].status         = wc[i].status;
 915                 resp->wc[i].opcode         = wc[i].opcode;
 916                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 917                 resp->wc[i].byte_len       = wc[i].byte_len;
 918                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 919                 resp->wc[i].qp_num         = wc[i].qp->qp_num;
 920                 resp->wc[i].src_qp         = wc[i].src_qp;
 921                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 922                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 923                 resp->wc[i].slid           = wc[i].slid;
 924                 resp->wc[i].sl             = wc[i].sl;
 925                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 926                 resp->wc[i].port_num       = wc[i].port_num;
 927         }
 928
 929         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 930                 ret = -EFAULT;
 931
 932 out:
 933         kfree(resp);
 934
 935 out_wc:
 936         kfree(wc);
 937         return ret ? ret : in_len;
 938 }
 939
 940 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 941                                 const char __user *buf, int in_len,
 942                                 int out_len)
 943 {
 944         struct ib_uverbs_req_notify_cq cmd;
 945         struct ib_cq                  *cq;
 946
 947         if (copy_from_user(&cmd, buf, sizeof cmd))
 948                 return -EFAULT;
 949
 950         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 951         if (!cq)
 952                 return -EINVAL;
 953
 954         ib_req_notify_cq(cq, cmd.solicited_only ?
 955                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 956
 957         put_cq_read(cq);
 958
 959         return in_len;
 960 }
 961
 962 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 963                              const char __user *buf, int in_len,
 964                              int out_len)
 965 {
 966         struct ib_uverbs_destroy_cq      cmd;
 967         struct ib_uverbs_destroy_cq_resp resp;
 968         struct ib_uobject               *uobj;
 969         struct ib_cq                    *cq;
 970         struct ib_ucq_object            *obj;
 971         struct ib_uverbs_event_file     *ev_file;
 972         int                              ret = -EINVAL;
 973
 974         if (copy_from_user(&cmd, buf, sizeof cmd))
 975                 return -EFAULT;
 976
 977         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 978         if (!uobj)
 979                 return -EINVAL;
 980         cq      = uobj->object;
 981         ev_file = cq->cq_context;
 982         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
 983
 984         ret = ib_destroy_cq(cq);
 985         if (!ret)
 986                 uobj->live = 0;
 987
 988         put_uobj_write(uobj);
 989
 990         if (ret)
 991                 return ret;
 992
 993         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
 994
 995         mutex_lock(&file->mutex);
 996         list_del(&uobj->list);
 997         mutex_unlock(&file->mutex);
 998
 999         ib_uverbs_release_ucq(file, ev_file, obj);
1000
1001         memset(&resp, 0, sizeof resp);
1002         resp.comp_events_reported  = obj->comp_events_reported;
1003         resp.async_events_reported = obj->async_events_reported;
1004
1005         put_uobj(uobj);
1006
1007         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1008                          &resp, sizeof resp))
1009                 return -EFAULT;
1010
1011         return in_len;
1012 }
1013
1014 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1015                             const char __user *buf, int in_len,
1016                             int out_len)
1017 {
1018         struct ib_uverbs_create_qp      cmd;
1019         struct ib_uverbs_create_qp_resp resp;
1020         struct ib_udata                 udata;
1021         struct ib_uqp_object           *obj;
1022         struct ib_pd                   *pd;
1023         struct ib_cq                   *scq, *rcq;
1024         struct ib_srq                  *srq;
1025         struct ib_qp                   *qp;
1026         struct ib_qp_init_attr          attr;
1027         int ret;
1028
1029         if (out_len < sizeof resp)
1030                 return -ENOSPC;
1031
1032         if (copy_from_user(&cmd, buf, sizeof cmd))
1033                 return -EFAULT;
1034
1035         INIT_UDATA(&udata, buf + sizeof cmd,
1036                    (unsigned long) cmd.response + sizeof resp,
1037                    in_len - sizeof cmd, out_len - sizeof resp);
1038
1039         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1040         if (!obj)
1041                 return -ENOMEM;
1042
1043         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1044         down_write(&obj->uevent.uobject.mutex);
1045
1046         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1047         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1048         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1049         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1050                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1051
1052         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1053                 ret = -EINVAL;
1054                 goto err_put;
1055         }
1056
1057         attr.event_handler = ib_uverbs_qp_event_handler;
1058         attr.qp_context    = file;
1059         attr.send_cq       = scq;
1060         attr.recv_cq       = rcq;
1061         attr.srq           = srq;
1062         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1063         attr.qp_type       = cmd.qp_type;
1064
1065         attr.cap.max_send_wr     = cmd.max_send_wr;
1066         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1067         attr.cap.max_send_sge    = cmd.max_send_sge;
1068         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1069         attr.cap.max_inline_data = cmd.max_inline_data;
1070
1071         obj->uevent.events_reported     = 0;
1072         INIT_LIST_HEAD(&obj->uevent.event_list);
1073         INIT_LIST_HEAD(&obj->mcast_list);
1074
1075         qp = pd->device->create_qp(pd, &attr, &udata);
1076         if (IS_ERR(qp)) {
1077                 ret = PTR_ERR(qp);
1078                 goto err_put;
1079         }
1080
1081         qp->device        = pd->device;
1082         qp->pd            = pd;
1083         qp->send_cq       = attr.send_cq;
1084         qp->recv_cq       = attr.recv_cq;
1085         qp->srq           = attr.srq;
1086         qp->uobject       = &obj->uevent.uobject;
1087         qp->event_handler = attr.event_handler;
1088         qp->qp_context    = attr.qp_context;
1089         qp->qp_type       = attr.qp_type;
1090         atomic_inc(&pd->usecnt);
1091         atomic_inc(&attr.send_cq->usecnt);
1092         atomic_inc(&attr.recv_cq->usecnt);
1093         if (attr.srq)
1094                 atomic_inc(&attr.srq->usecnt);
1095
1096         obj->uevent.uobject.object = qp;
1097         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1098         if (ret)
1099                 goto err_destroy;
1100
1101         memset(&resp, 0, sizeof resp);
1102         resp.qpn             = qp->qp_num;
1103         resp.qp_handle       = obj->uevent.uobject.id;
1104         resp.max_recv_sge    = attr.cap.max_recv_sge;
1105         resp.max_send_sge    = attr.cap.max_send_sge;
1106         resp.max_recv_wr     = attr.cap.max_recv_wr;
1107         resp.max_send_wr     = attr.cap.max_send_wr;
1108         resp.max_inline_data = attr.cap.max_inline_data;
1109
1110         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1111                          &resp, sizeof resp)) {
1112                 ret = -EFAULT;
1113                 goto err_copy;
1114         }
1115
1116         put_pd_read(pd);
1117         put_cq_read(scq);
1118         if (rcq != scq)
1119                 put_cq_read(rcq);
1120         if (srq)
1121                 put_srq_read(srq);
1122
1123         mutex_lock(&file->mutex);
1124         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1125         mutex_unlock(&file->mutex);
1126
1127         obj->uevent.uobject.live = 1;
1128
1129         up_write(&obj->uevent.uobject.mutex);
1130
1131         return in_len;
1132
1133 err_copy:
1134         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1135
1136 err_destroy:
1137         ib_destroy_qp(qp);
1138
1139 err_put:
1140         if (pd)
1141                 put_pd_read(pd);
1142         if (scq)
1143                 put_cq_read(scq);
1144         if (rcq && rcq != scq)
1145                 put_cq_read(rcq);
1146         if (srq)
1147                 put_srq_read(srq);
1148
1149         put_uobj_write(&obj->uevent.uobject);
1150         return ret;
1151 }
1152
1153 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1154                            const char __user *buf, int in_len,
1155                            int out_len)
1156 {
1157         struct ib_uverbs_query_qp      cmd;
1158         struct ib_uverbs_query_qp_resp resp;
1159         struct ib_qp                   *qp;
1160         struct ib_qp_attr              *attr;
1161         struct ib_qp_init_attr         *init_attr;
1162         int                            ret;
1163
1164         if (copy_from_user(&cmd, buf, sizeof cmd))
1165                 return -EFAULT;
1166
1167         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1168         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1169         if (!attr || !init_attr) {
1170                 ret = -ENOMEM;
1171                 goto out;
1172         }
1173
1174         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1175         if (!qp) {
1176                 ret = -EINVAL;
1177                 goto out;
1178         }
1179
1180         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1181
1182         put_qp_read(qp);
1183
1184         if (ret)
1185                 goto out;
1186
1187         memset(&resp, 0, sizeof resp);
1188
1189         resp.qp_state               = attr->qp_state;
1190         resp.cur_qp_state           = attr->cur_qp_state;
1191         resp.path_mtu               = attr->path_mtu;
1192         resp.path_mig_state         = attr->path_mig_state;
1193         resp.qkey                   = attr->qkey;
1194         resp.rq_psn                 = attr->rq_psn;
1195         resp.sq_psn                 = attr->sq_psn;
1196         resp.dest_qp_num            = attr->dest_qp_num;
1197         resp.qp_access_flags        = attr->qp_access_flags;
1198         resp.pkey_index             = attr->pkey_index;
1199         resp.alt_pkey_index         = attr->alt_pkey_index;
1200         resp.sq_draining            = attr->sq_draining;
1201         resp.max_rd_atomic          = attr->max_rd_atomic;
1202         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1203         resp.min_rnr_timer          = attr->min_rnr_timer;
1204         resp.port_num               = attr->port_num;
1205         resp.timeout                = attr->timeout;
1206         resp.retry_cnt              = attr->retry_cnt;
1207         resp.rnr_retry              = attr->rnr_retry;
1208         resp.alt_port_num           = attr->alt_port_num;
1209         resp.alt_timeout            = attr->alt_timeout;
1210
1211         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1212         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1213         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1214         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1215         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1216         resp.dest.dlid              = attr->ah_attr.dlid;
1217         resp.dest.sl                = attr->ah_attr.sl;
1218         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1219         resp.dest.static_rate       = attr->ah_attr.static_rate;
1220         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1221         resp.dest.port_num          = attr->ah_attr.port_num;
1222
1223         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1224         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1225         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1226         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1227         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1228         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1229         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1230         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1231         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1232         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1233         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1234
1235         resp.max_send_wr            = init_attr->cap.max_send_wr;
1236         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1237         resp.max_send_sge           = init_attr->cap.max_send_sge;
1238         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1239         resp.max_inline_data        = init_attr->cap.max_inline_data;
1240         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1241
1242         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1243                          &resp, sizeof resp))
1244                 ret = -EFAULT;
1245
1246 out:
1247         kfree(attr);
1248         kfree(init_attr);
1249
1250         return ret ? ret : in_len;
1251 }
1252
1253 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1254                             const char __user *buf, int in_len,
1255                             int out_len)
1256 {
1257         struct ib_uverbs_modify_qp cmd;
1258         struct ib_udata            udata;
1259         struct ib_qp              *qp;
1260         struct ib_qp_attr         *attr;
1261         int                        ret;
1262
1263         if (copy_from_user(&cmd, buf, sizeof cmd))
1264                 return -EFAULT;
1265
1266         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1267                    out_len);
1268
1269         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1270         if (!attr)
1271                 return -ENOMEM;
1272
1273         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1274         if (!qp) {
1275                 ret = -EINVAL;
1276                 goto out;
1277         }
1278
1279         attr->qp_state            = cmd.qp_state;
1280         attr->cur_qp_state        = cmd.cur_qp_state;
1281         attr->path_mtu            = cmd.path_mtu;
1282         attr->path_mig_state      = cmd.path_mig_state;
1283         attr->qkey                = cmd.qkey;
1284         attr->rq_psn              = cmd.rq_psn;
1285         attr->sq_psn              = cmd.sq_psn;
1286         attr->dest_qp_num         = cmd.dest_qp_num;
1287         attr->qp_access_flags     = cmd.qp_access_flags;
1288         attr->pkey_index          = cmd.pkey_index;
1289         attr->alt_pkey_index      = cmd.alt_pkey_index;
1290         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1291         attr->max_rd_atomic       = cmd.max_rd_atomic;
1292         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1293         attr->min_rnr_timer       = cmd.min_rnr_timer;
1294         attr->port_num            = cmd.port_num;
1295         attr->timeout             = cmd.timeout;
1296         attr->retry_cnt           = cmd.retry_cnt;
1297         attr->rnr_retry           = cmd.rnr_retry;
1298         attr->alt_port_num        = cmd.alt_port_num;
1299         attr->alt_timeout         = cmd.alt_timeout;
1300
1301         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1302         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1303         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1304         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1305         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1306         attr->ah_attr.dlid                  = cmd.dest.dlid;
1307         attr->ah_attr.sl                    = cmd.dest.sl;
1308         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1309         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1310         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1311         attr->ah_attr.port_num              = cmd.dest.port_num;
1312
1313         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1314         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1315         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1316         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1317         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1318         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1319         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1320         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1321         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1322         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1323         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1324
1325         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1326
1327         put_qp_read(qp);
1328
1329         if (ret)
1330                 goto out;
1331
1332         ret = in_len;
1333
1334 out:
1335         kfree(attr);
1336
1337         return ret;
1338 }
1339
1340 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1341                              const char __user *buf, int in_len,
1342                              int out_len)
1343 {
1344         struct ib_uverbs_destroy_qp      cmd;
1345         struct ib_uverbs_destroy_qp_resp resp;
1346         struct ib_uobject               *uobj;
1347         struct ib_qp                    *qp;
1348         struct ib_uqp_object            *obj;
1349         int                              ret = -EINVAL;
1350
1351         if (copy_from_user(&cmd, buf, sizeof cmd))
1352                 return -EFAULT;
1353
1354         memset(&resp, 0, sizeof resp);
1355
1356         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1357         if (!uobj)
1358                 return -EINVAL;
1359         qp  = uobj->object;
1360         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1361
1362         if (!list_empty(&obj->mcast_list)) {
1363                 put_uobj_write(uobj);
1364                 return -EBUSY;
1365         }
1366
1367         ret = ib_destroy_qp(qp);
1368         if (!ret)
1369                 uobj->live = 0;
1370
1371         put_uobj_write(uobj);
1372
1373         if (ret)
1374                 return ret;
1375
1376         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1377
1378         mutex_lock(&file->mutex);
1379         list_del(&uobj->list);
1380         mutex_unlock(&file->mutex);
1381
1382         ib_uverbs_release_uevent(file, &obj->uevent);
1383
1384         resp.events_reported = obj->uevent.events_reported;
1385
1386         put_uobj(uobj);
1387
1388         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1389                          &resp, sizeof resp))
1390                 return -EFAULT;
1391
1392         return in_len;
1393 }
1394
1395 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1396                             const char __user *buf, int in_len,
1397                             int out_len)
1398 {
1399         struct ib_uverbs_post_send      cmd;
1400         struct ib_uverbs_post_send_resp resp;
1401         struct ib_uverbs_send_wr       *user_wr;
1402         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1403         struct ib_qp                   *qp;
1404         int                             i, sg_ind;
1405         int                             is_ud;
1406         ssize_t                         ret = -EINVAL;
1407
1408         if (copy_from_user(&cmd, buf, sizeof cmd))
1409                 return -EFAULT;
1410
1411         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1412             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1413                 return -EINVAL;
1414
1415         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1416                 return -EINVAL;
1417
1418         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1419         if (!user_wr)
1420                 return -ENOMEM;
1421
1422         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1423         if (!qp)
1424                 goto out;
1425
1426         is_ud = qp->qp_type == IB_QPT_UD;
1427         sg_ind = 0;
1428         last = NULL;
1429         for (i = 0; i < cmd.wr_count; ++i) {
1430                 if (copy_from_user(user_wr,
1431                                    buf + sizeof cmd + i * cmd.wqe_size,
1432                                    cmd.wqe_size)) {
1433                         ret = -EFAULT;
1434                         goto out_put;
1435                 }
1436
1437                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1438                         ret = -EINVAL;
1439                         goto out_put;
1440                 }
1441
1442                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1443                                user_wr->num_sge * sizeof (struct ib_sge),
1444                                GFP_KERNEL);
1445                 if (!next) {
1446                         ret = -ENOMEM;
1447                         goto out_put;
1448                 }
1449
1450                 if (!last)
1451                         wr = next;
1452                 else
1453                         last->next = next;
1454                 last = next;
1455
1456                 next->next       = NULL;
1457                 next->wr_id      = user_wr->wr_id;
1458                 next->num_sge    = user_wr->num_sge;
1459                 next->opcode     = user_wr->opcode;
1460                 next->send_flags = user_wr->send_flags;
1461                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1462
1463                 if (is_ud) {
1464                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1465                                                      file->ucontext);
1466                         if (!next->wr.ud.ah) {
1467                                 ret = -EINVAL;
1468                                 goto out_put;
1469                         }
1470                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1471                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1472                 } else {
1473                         switch (next->opcode) {
1474                         case IB_WR_RDMA_WRITE:
1475                         case IB_WR_RDMA_WRITE_WITH_IMM:
1476                         case IB_WR_RDMA_READ:
1477                                 next->wr.rdma.remote_addr =
1478                                         user_wr->wr.rdma.remote_addr;
1479                                 next->wr.rdma.rkey        =
1480                                         user_wr->wr.rdma.rkey;
1481                                 break;
1482                         case IB_WR_ATOMIC_CMP_AND_SWP:
1483                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1484                                 next->wr.atomic.remote_addr =
1485                                         user_wr->wr.atomic.remote_addr;
1486                                 next->wr.atomic.compare_add =
1487                                         user_wr->wr.atomic.compare_add;
1488                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1489                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1490                                 break;
1491                         default:
1492                                 break;
1493                         }
1494                 }
1495
1496                 if (next->num_sge) {
1497                         next->sg_list = (void *) next +
1498                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1499                         if (copy_from_user(next->sg_list,
1500                                            buf + sizeof cmd +
1501                                            cmd.wr_count * cmd.wqe_size +
1502                                            sg_ind * sizeof (struct ib_sge),
1503                                            next->num_sge * sizeof (struct ib_sge))) {
1504                                 ret = -EFAULT;
1505                                 goto out_put;
1506                         }
1507                         sg_ind += next->num_sge;
1508                 } else
1509                         next->sg_list = NULL;
1510         }
1511
1512         resp.bad_wr = 0;
1513         ret = qp->device->post_send(qp, wr, &bad_wr);
1514         if (ret)
1515                 for (next = wr; next; next = next->next) {
1516                         ++resp.bad_wr;
1517                         if (next == bad_wr)
1518                                 break;
1519                 }
1520
1521         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1522                          &resp, sizeof resp))
1523                 ret = -EFAULT;
1524
1525 out_put:
1526         put_qp_read(qp);
1527
1528         while (wr) {
1529                 if (is_ud && wr->wr.ud.ah)
1530                         put_ah_read(wr->wr.ud.ah);
1531                 next = wr->next;
1532                 kfree(wr);
1533                 wr = next;
1534         }
1535
1536 out:
1537         kfree(user_wr);
1538
1539         return ret ? ret : in_len;
1540 }
1541
1542 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1543                                                     int in_len,
1544                                                     u32 wr_count,
1545                                                     u32 sge_count,
1546                                                     u32 wqe_size)
1547 {
1548         struct ib_uverbs_recv_wr *user_wr;
1549         struct ib_recv_wr        *wr = NULL, *last, *next;
1550         int                       sg_ind;
1551         int                       i;
1552         int                       ret;
1553
1554         if (in_len < wqe_size * wr_count +
1555             sge_count * sizeof (struct ib_uverbs_sge))
1556                 return ERR_PTR(-EINVAL);
1557
1558         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1559                 return ERR_PTR(-EINVAL);
1560
1561         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1562         if (!user_wr)
1563                 return ERR_PTR(-ENOMEM);
1564
1565         sg_ind = 0;
1566         last = NULL;
1567         for (i = 0; i < wr_count; ++i) {
1568                 if (copy_from_user(user_wr, buf + i * wqe_size,
1569                                    wqe_size)) {
1570                         ret = -EFAULT;
1571                         goto err;
1572                 }
1573
1574                 if (user_wr->num_sge + sg_ind > sge_count) {
1575                         ret = -EINVAL;
1576                         goto err;
1577                 }
1578
1579                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1580                                user_wr->num_sge * sizeof (struct ib_sge),
1581                                GFP_KERNEL);
1582                 if (!next) {
1583                         ret = -ENOMEM;
1584                         goto err;
1585                 }
1586
1587                 if (!last)
1588                         wr = next;
1589                 else
1590                         last->next = next;
1591                 last = next;
1592
1593                 next->next       = NULL;
1594                 next->wr_id      = user_wr->wr_id;
1595                 next->num_sge    = user_wr->num_sge;
1596
1597                 if (next->num_sge) {
1598                         next->sg_list = (void *) next +
1599                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1600                         if (copy_from_user(next->sg_list,
1601                                            buf + wr_count * wqe_size +
1602                                            sg_ind * sizeof (struct ib_sge),
1603                                            next->num_sge * sizeof (struct ib_sge))) {
1604                                 ret = -EFAULT;
1605                                 goto err;
1606                         }
1607                         sg_ind += next->num_sge;
1608                 } else
1609                         next->sg_list = NULL;
1610         }
1611
1612         kfree(user_wr);
1613         return wr;
1614
1615 err:
1616         kfree(user_wr);
1617
1618         while (wr) {
1619                 next = wr->next;
1620                 kfree(wr);
1621                 wr = next;
1622         }
1623
1624         return ERR_PTR(ret);
1625 }
1626
1627 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1628                             const char __user *buf, int in_len,
1629                             int out_len)
1630 {
1631         struct ib_uverbs_post_recv      cmd;
1632         struct ib_uverbs_post_recv_resp resp;
1633         struct ib_recv_wr              *wr, *next, *bad_wr;
1634         struct ib_qp                   *qp;
1635         ssize_t                         ret = -EINVAL;
1636
1637         if (copy_from_user(&cmd, buf, sizeof cmd))
1638                 return -EFAULT;
1639
1640         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1641                                        in_len - sizeof cmd, cmd.wr_count,
1642                                        cmd.sge_count, cmd.wqe_size);
1643         if (IS_ERR(wr))
1644                 return PTR_ERR(wr);
1645
1646         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1647         if (!qp)
1648                 goto out;
1649
1650         resp.bad_wr = 0;
1651         ret = qp->device->post_recv(qp, wr, &bad_wr);
1652
1653         put_qp_read(qp);
1654
1655         if (ret)
1656                 for (next = wr; next; next = next->next) {
1657                         ++resp.bad_wr;
1658                         if (next == bad_wr)
1659                                 break;
1660                 }
1661
1662         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1663                          &resp, sizeof resp))
1664                 ret = -EFAULT;
1665
1666 out:
1667         while (wr) {
1668                 next = wr->next;
1669                 kfree(wr);
1670                 wr = next;
1671         }
1672
1673         return ret ? ret : in_len;
1674 }
1675
1676 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1677                                 const char __user *buf, int in_len,
1678                                 int out_len)
1679 {
1680         struct ib_uverbs_post_srq_recv      cmd;
1681         struct ib_uverbs_post_srq_recv_resp resp;
1682         struct ib_recv_wr                  *wr, *next, *bad_wr;
1683         struct ib_srq                      *srq;
1684         ssize_t                             ret = -EINVAL;
1685
1686         if (copy_from_user(&cmd, buf, sizeof cmd))
1687                 return -EFAULT;
1688
1689         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1690                                        in_len - sizeof cmd, cmd.wr_count,
1691                                        cmd.sge_count, cmd.wqe_size);
1692         if (IS_ERR(wr))
1693                 return PTR_ERR(wr);
1694
1695         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1696         if (!srq)
1697                 goto out;
1698
1699         resp.bad_wr = 0;
1700         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1701
1702         put_srq_read(srq);
1703
1704         if (ret)
1705                 for (next = wr; next; next = next->next) {
1706                         ++resp.bad_wr;
1707                         if (next == bad_wr)
1708                                 break;
1709                 }
1710
1711         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1712                          &resp, sizeof resp))
1713                 ret = -EFAULT;
1714
1715 out:
1716         while (wr) {
1717                 next = wr->next;
1718                 kfree(wr);
1719                 wr = next;
1720         }
1721
1722         return ret ? ret : in_len;
1723 }
1724
1725 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1726                             const char __user *buf, int in_len,
1727                             int out_len)
1728 {
1729         struct ib_uverbs_create_ah       cmd;
1730         struct ib_uverbs_create_ah_resp  resp;
1731         struct ib_uobject               *uobj;
1732         struct ib_pd                    *pd;
1733         struct ib_ah                    *ah;
1734         struct ib_ah_attr               attr;
1735         int ret;
1736
1737         if (out_len < sizeof resp)
1738                 return -ENOSPC;
1739
1740         if (copy_from_user(&cmd, buf, sizeof cmd))
1741                 return -EFAULT;
1742
1743         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1744         if (!uobj)
1745                 return -ENOMEM;
1746
1747         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1748         down_write(&uobj->mutex);
1749
1750         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1751         if (!pd) {
1752                 ret = -EINVAL;
1753                 goto err;
1754         }
1755
1756         attr.dlid              = cmd.attr.dlid;
1757         attr.sl                = cmd.attr.sl;
1758         attr.src_path_bits     = cmd.attr.src_path_bits;
1759         attr.static_rate       = cmd.attr.static_rate;
1760         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1761         attr.port_num          = cmd.attr.port_num;
1762         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1763         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1764         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1765         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1766         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1767
1768         ah = ib_create_ah(pd, &attr);
1769         if (IS_ERR(ah)) {
1770                 ret = PTR_ERR(ah);
1771                 goto err_put;
1772         }
1773
1774         ah->uobject  = uobj;
1775         uobj->object = ah;
1776
1777         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1778         if (ret)
1779                 goto err_destroy;
1780
1781         resp.ah_handle = uobj->id;
1782
1783         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1784                          &resp, sizeof resp)) {
1785                 ret = -EFAULT;
1786                 goto err_copy;
1787         }
1788
1789         put_pd_read(pd);
1790
1791         mutex_lock(&file->mutex);
1792         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1793         mutex_unlock(&file->mutex);
1794
1795         uobj->live = 1;
1796
1797         up_write(&uobj->mutex);
1798
1799         return in_len;
1800
1801 err_copy:
1802         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1803
1804 err_destroy:
1805         ib_destroy_ah(ah);
1806
1807 err_put:
1808         put_pd_read(pd);
1809
1810 err:
1811         put_uobj_write(uobj);
1812         return ret;
1813 }
1814
1815 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1816                              const char __user *buf, int in_len, int out_len)
1817 {
1818         struct ib_uverbs_destroy_ah cmd;
1819         struct ib_ah               *ah;
1820         struct ib_uobject          *uobj;
1821         int                         ret;
1822
1823         if (copy_from_user(&cmd, buf, sizeof cmd))
1824                 return -EFAULT;
1825
1826         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1827         if (!uobj)
1828                 return -EINVAL;
1829         ah = uobj->object;
1830
1831         ret = ib_destroy_ah(ah);
1832         if (!ret)
1833                 uobj->live = 0;
1834
1835         put_uobj_write(uobj);
1836
1837         if (ret)
1838                 return ret;
1839
1840         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1841
1842         mutex_lock(&file->mutex);
1843         list_del(&uobj->list);
1844         mutex_unlock(&file->mutex);
1845
1846         put_uobj(uobj);
1847
1848         return in_len;
1849 }
1850
1851 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1852                                const char __user *buf, int in_len,
1853                                int out_len)
1854 {
1855         struct ib_uverbs_attach_mcast cmd;
1856         struct ib_qp                 *qp;
1857         struct ib_uqp_object         *obj;
1858         struct ib_uverbs_mcast_entry *mcast;
1859         int                           ret;
1860
1861         if (copy_from_user(&cmd, buf, sizeof cmd))
1862                 return -EFAULT;
1863
1864         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1865         if (!qp)
1866                 return -EINVAL;
1867
1868         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1869
1870         list_for_each_entry(mcast, &obj->mcast_list, list)
1871                 if (cmd.mlid == mcast->lid &&
1872                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1873                         ret = 0;
1874                         goto out_put;
1875                 }
1876
1877         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1878         if (!mcast) {
1879                 ret = -ENOMEM;
1880                 goto out_put;
1881         }
1882
1883         mcast->lid = cmd.mlid;
1884         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1885
1886         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1887         if (!ret)
1888                 list_add_tail(&mcast->list, &obj->mcast_list);
1889         else
1890                 kfree(mcast);
1891
1892 out_put:
1893         put_qp_read(qp);
1894
1895         return ret ? ret : in_len;
1896 }
1897
1898 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1899                                const char __user *buf, int in_len,
1900                                int out_len)
1901 {
1902         struct ib_uverbs_detach_mcast cmd;
1903         struct ib_uqp_object         *obj;
1904         struct ib_qp                 *qp;
1905         struct ib_uverbs_mcast_entry *mcast;
1906         int                           ret = -EINVAL;
1907
1908         if (copy_from_user(&cmd, buf, sizeof cmd))
1909                 return -EFAULT;
1910
1911         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1912         if (!qp)
1913                 return -EINVAL;
1914
1915         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1916         if (ret)
1917                 goto out_put;
1918
1919         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1920
1921         list_for_each_entry(mcast, &obj->mcast_list, list)
1922                 if (cmd.mlid == mcast->lid &&
1923                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1924                         list_del(&mcast->list);
1925                         kfree(mcast);
1926                         break;
1927                 }
1928
1929 out_put:
1930         put_qp_read(qp);
1931
1932         return ret ? ret : in_len;
1933 }
1934
1935 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1936                              const char __user *buf, int in_len,
1937                              int out_len)
1938 {
1939         struct ib_uverbs_create_srq      cmd;
1940         struct ib_uverbs_create_srq_resp resp;
1941         struct ib_udata                  udata;
1942         struct ib_uevent_object         *obj;
1943         struct ib_pd                    *pd;
1944         struct ib_srq                   *srq;
1945         struct ib_srq_init_attr          attr;
1946         int ret;
1947
1948         if (out_len < sizeof resp)
1949                 return -ENOSPC;
1950
1951         if (copy_from_user(&cmd, buf, sizeof cmd))
1952                 return -EFAULT;
1953
1954         INIT_UDATA(&udata, buf + sizeof cmd,
1955                    (unsigned long) cmd.response + sizeof resp,
1956                    in_len - sizeof cmd, out_len - sizeof resp);
1957
1958         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1959         if (!obj)
1960                 return -ENOMEM;
1961
1962         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1963         down_write(&obj->uobject.mutex);
1964
1965         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1966         if (!pd) {
1967                 ret = -EINVAL;
1968                 goto err;
1969         }
1970
1971         attr.event_handler  = ib_uverbs_srq_event_handler;
1972         attr.srq_context    = file;
1973         attr.attr.max_wr    = cmd.max_wr;
1974         attr.attr.max_sge   = cmd.max_sge;
1975         attr.attr.srq_limit = cmd.srq_limit;
1976
1977         obj->events_reported     = 0;
1978         INIT_LIST_HEAD(&obj->event_list);
1979
1980         srq = pd->device->create_srq(pd, &attr, &udata);
1981         if (IS_ERR(srq)) {
1982                 ret = PTR_ERR(srq);
1983                 goto err_put;
1984         }
1985
1986         srq->device        = pd->device;
1987         srq->pd            = pd;
1988         srq->uobject       = &obj->uobject;
1989         srq->event_handler = attr.event_handler;
1990         srq->srq_context   = attr.srq_context;
1991         atomic_inc(&pd->usecnt);
1992         atomic_set(&srq->usecnt, 0);
1993
1994         obj->uobject.object = srq;
1995         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
1996         if (ret)
1997                 goto err_destroy;
1998
1999         memset(&resp, 0, sizeof resp);
2000         resp.srq_handle = obj->uobject.id;
2001         resp.max_wr     = attr.attr.max_wr;
2002         resp.max_sge    = attr.attr.max_sge;
2003
2004         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2005                          &resp, sizeof resp)) {
2006                 ret = -EFAULT;
2007                 goto err_copy;
2008         }
2009
2010         put_pd_read(pd);
2011
2012         mutex_lock(&file->mutex);
2013         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2014         mutex_unlock(&file->mutex);
2015
2016         obj->uobject.live = 1;
2017
2018         up_write(&obj->uobject.mutex);
2019
2020         return in_len;
2021
2022 err_copy:
2023         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2024
2025 err_destroy:
2026         ib_destroy_srq(srq);
2027
2028 err_put:
2029         put_pd_read(pd);
2030
2031 err:
2032         put_uobj_write(&obj->uobject);
2033         return ret;
2034 }
2035
2036 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2037                              const char __user *buf, int in_len,
2038                              int out_len)
2039 {
2040         struct ib_uverbs_modify_srq cmd;
2041         struct ib_udata             udata;
2042         struct ib_srq              *srq;
2043         struct ib_srq_attr          attr;
2044         int                         ret;
2045
2046         if (copy_from_user(&cmd, buf, sizeof cmd))
2047                 return -EFAULT;
2048
2049         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2050                    out_len);
2051
2052         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2053         if (!srq)
2054                 return -EINVAL;
2055
2056         attr.max_wr    = cmd.max_wr;
2057         attr.srq_limit = cmd.srq_limit;
2058
2059         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2060
2061         put_srq_read(srq);
2062
2063         return ret ? ret : in_len;
2064 }
2065
2066 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2067                             const char __user *buf,
2068                             int in_len, int out_len)
2069 {
2070         struct ib_uverbs_query_srq      cmd;
2071         struct ib_uverbs_query_srq_resp resp;
2072         struct ib_srq_attr              attr;
2073         struct ib_srq                   *srq;
2074         int                             ret;
2075
2076         if (out_len < sizeof resp)
2077                 return -ENOSPC;
2078
2079         if (copy_from_user(&cmd, buf, sizeof cmd))
2080                 return -EFAULT;
2081
2082         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2083         if (!srq)
2084                 return -EINVAL;
2085
2086         ret = ib_query_srq(srq, &attr);
2087
2088         put_srq_read(srq);
2089
2090         if (ret)
2091                 return ret;
2092
2093         memset(&resp, 0, sizeof resp);
2094
2095         resp.max_wr    = attr.max_wr;
2096         resp.max_sge   = attr.max_sge;
2097         resp.srq_limit = attr.srq_limit;
2098
2099         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2100                          &resp, sizeof resp))
2101                 return -EFAULT;
2102
2103         return in_len;
2104 }
2105
2106 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2107                               const char __user *buf, int in_len,
2108                               int out_len)
2109 {
2110         struct ib_uverbs_destroy_srq      cmd;
2111         struct ib_uverbs_destroy_srq_resp resp;
2112         struct ib_uobject                *uobj;
2113         struct ib_srq                    *srq;
2114         struct ib_uevent_object          *obj;
2115         int                               ret = -EINVAL;
2116
2117         if (copy_from_user(&cmd, buf, sizeof cmd))
2118                 return -EFAULT;
2119
2120         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2121         if (!uobj)
2122                 return -EINVAL;
2123         srq = uobj->object;
2124         obj = container_of(uobj, struct ib_uevent_object, uobject);
2125
2126         ret = ib_destroy_srq(srq);
2127         if (!ret)
2128                 uobj->live = 0;
2129
2130         put_uobj_write(uobj);
2131
2132         if (ret)
2133                 return ret;
2134
2135         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2136
2137         mutex_lock(&file->mutex);
2138         list_del(&uobj->list);
2139         mutex_unlock(&file->mutex);
2140
2141         ib_uverbs_release_uevent(file, obj);
2142
2143         memset(&resp, 0, sizeof resp);
2144         resp.events_reported = obj->events_reported;
2145
2146         put_uobj(uobj);
2147
2148         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2149                          &resp, sizeof resp))
2150                 ret = -EFAULT;
2151
2152         return ret ? ret : in_len;
2153 }