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