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                 if (uobj->context == context)
 152                         kref_get(&uobj->ref);
 153                 else
 154                         uobj = NULL;
 155         }
 156         spin_unlock(&ib_uverbs_idr_lock);
 157
 158         return uobj;
 159 }
 160
 161 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 162                                         struct ib_ucontext *context, int nested)
 163 {
 164         struct ib_uobject *uobj;
 165
 166         uobj = __idr_get_uobj(idr, id, context);
 167         if (!uobj)
 168                 return NULL;
 169
 170         if (nested)
 171                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 172         else
 173                 down_read(&uobj->mutex);
 174         if (!uobj->live) {
 175                 put_uobj_read(uobj);
 176                 return NULL;
 177         }
 178
 179         return uobj;
 180 }
 181
 182 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 183                                          struct ib_ucontext *context)
 184 {
 185         struct ib_uobject *uobj;
 186
 187         uobj = __idr_get_uobj(idr, id, context);
 188         if (!uobj)
 189                 return NULL;
 190
 191         down_write(&uobj->mutex);
 192         if (!uobj->live) {
 193                 put_uobj_write(uobj);
 194                 return NULL;
 195         }
 196
 197         return uobj;
 198 }
 199
 200 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 201                           int nested)
 202 {
 203         struct ib_uobject *uobj;
 204
 205         uobj = idr_read_uobj(idr, id, context, nested);
 206         return uobj ? uobj->object : NULL;
 207 }
 208
 209 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 210 {
 211         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 212 }
 213
 214 static void put_pd_read(struct ib_pd *pd)
 215 {
 216         put_uobj_read(pd->uobject);
 217 }
 218
 219 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 220 {
 221         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 222 }
 223
 224 static void put_cq_read(struct ib_cq *cq)
 225 {
 226         put_uobj_read(cq->uobject);
 227 }
 228
 229 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 230 {
 231         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 232 }
 233
 234 static void put_ah_read(struct ib_ah *ah)
 235 {
 236         put_uobj_read(ah->uobject);
 237 }
 238
 239 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 240 {
 241         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 242 }
 243
 244 static void put_qp_read(struct ib_qp *qp)
 245 {
 246         put_uobj_read(qp->uobject);
 247 }
 248
 249 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 250 {
 251         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 252 }
 253
 254 static void put_srq_read(struct ib_srq *srq)
 255 {
 256         put_uobj_read(srq->uobject);
 257 }
 258
 259 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 260                               const char __user *buf,
 261                               int in_len, int out_len)
 262 {
 263         struct ib_uverbs_get_context      cmd;
 264         struct ib_uverbs_get_context_resp resp;
 265         struct ib_udata                   udata;
 266         struct ib_device                 *ibdev = file->device->ib_dev;
 267         struct ib_ucontext               *ucontext;
 268         struct file                      *filp;
 269         int ret;
 270
 271         if (out_len < sizeof resp)
 272                 return -ENOSPC;
 273
 274         if (copy_from_user(&cmd, buf, sizeof cmd))
 275                 return -EFAULT;
 276
 277         mutex_lock(&file->mutex);
 278
 279         if (file->ucontext) {
 280                 ret = -EINVAL;
 281                 goto err;
 282         }
 283
 284         INIT_UDATA(&udata, buf + sizeof cmd,
 285                    (unsigned long) cmd.response + sizeof resp,
 286                    in_len - sizeof cmd, out_len - sizeof resp);
 287
 288         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 289         if (IS_ERR(ucontext)) {
 290                 ret = PTR_ERR(file->ucontext);
 291                 goto err;
 292         }
 293
 294         ucontext->device = ibdev;
 295         INIT_LIST_HEAD(&ucontext->pd_list);
 296         INIT_LIST_HEAD(&ucontext->mr_list);
 297         INIT_LIST_HEAD(&ucontext->mw_list);
 298         INIT_LIST_HEAD(&ucontext->cq_list);
 299         INIT_LIST_HEAD(&ucontext->qp_list);
 300         INIT_LIST_HEAD(&ucontext->srq_list);
 301         INIT_LIST_HEAD(&ucontext->ah_list);
 302         ucontext->closing = 0;
 303
 304         resp.num_comp_vectors = file->device->num_comp_vectors;
 305
 306         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 307         if (IS_ERR(filp)) {
 308                 ret = PTR_ERR(filp);
 309                 goto err_free;
 310         }
 311
 312         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 313                          &resp, sizeof resp)) {
 314                 ret = -EFAULT;
 315                 goto err_file;
 316         }
 317
 318         file->async_file = filp->private_data;
 319
 320         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 321                               ib_uverbs_event_handler);
 322         ret = ib_register_event_handler(&file->event_handler);
 323         if (ret)
 324                 goto err_file;
 325
 326         kref_get(&file->async_file->ref);
 327         kref_get(&file->ref);
 328         file->ucontext = ucontext;
 329
 330         fd_install(resp.async_fd, filp);
 331
 332         mutex_unlock(&file->mutex);
 333
 334         return in_len;
 335
 336 err_file:
 337         put_unused_fd(resp.async_fd);
 338         fput(filp);
 339
 340 err_free:
 341         ibdev->dealloc_ucontext(ucontext);
 342
 343 err:
 344         mutex_unlock(&file->mutex);
 345         return ret;
 346 }
 347
 348 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 349                                const char __user *buf,
 350                                int in_len, int out_len)
 351 {
 352         struct ib_uverbs_query_device      cmd;
 353         struct ib_uverbs_query_device_resp resp;
 354         struct ib_device_attr              attr;
 355         int                                ret;
 356
 357         if (out_len < sizeof resp)
 358                 return -ENOSPC;
 359
 360         if (copy_from_user(&cmd, buf, sizeof cmd))
 361                 return -EFAULT;
 362
 363         ret = ib_query_device(file->device->ib_dev, &attr);
 364         if (ret)
 365                 return ret;
 366
 367         memset(&resp, 0, sizeof resp);
 368
 369         resp.fw_ver                    = attr.fw_ver;
 370         resp.node_guid                 = file->device->ib_dev->node_guid;
 371         resp.sys_image_guid            = attr.sys_image_guid;
 372         resp.max_mr_size               = attr.max_mr_size;
 373         resp.page_size_cap             = attr.page_size_cap;
 374         resp.vendor_id                 = attr.vendor_id;
 375         resp.vendor_part_id            = attr.vendor_part_id;
 376         resp.hw_ver                    = attr.hw_ver;
 377         resp.max_qp                    = attr.max_qp;
 378         resp.max_qp_wr                 = attr.max_qp_wr;
 379         resp.device_cap_flags          = attr.device_cap_flags;
 380         resp.max_sge                   = attr.max_sge;
 381         resp.max_sge_rd                = attr.max_sge_rd;
 382         resp.max_cq                    = attr.max_cq;
 383         resp.max_cqe                   = attr.max_cqe;
 384         resp.max_mr                    = attr.max_mr;
 385         resp.max_pd                    = attr.max_pd;
 386         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 387         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 388         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 389         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 390         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 391         resp.atomic_cap                = attr.atomic_cap;
 392         resp.max_ee                    = attr.max_ee;
 393         resp.max_rdd                   = attr.max_rdd;
 394         resp.max_mw                    = attr.max_mw;
 395         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 396         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 397         resp.max_mcast_grp             = attr.max_mcast_grp;
 398         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 399         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 400         resp.max_ah                    = attr.max_ah;
 401         resp.max_fmr                   = attr.max_fmr;
 402         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 403         resp.max_srq                   = attr.max_srq;
 404         resp.max_srq_wr                = attr.max_srq_wr;
 405         resp.max_srq_sge               = attr.max_srq_sge;
 406         resp.max_pkeys                 = attr.max_pkeys;
 407         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 408         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 409
 410         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 411                          &resp, sizeof resp))
 412                 return -EFAULT;
 413
 414         return in_len;
 415 }
 416
 417 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 418                              const char __user *buf,
 419                              int in_len, int out_len)
 420 {
 421         struct ib_uverbs_query_port      cmd;
 422         struct ib_uverbs_query_port_resp resp;
 423         struct ib_port_attr              attr;
 424         int                              ret;
 425
 426         if (out_len < sizeof resp)
 427                 return -ENOSPC;
 428
 429         if (copy_from_user(&cmd, buf, sizeof cmd))
 430                 return -EFAULT;
 431
 432         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 433         if (ret)
 434                 return ret;
 435
 436         memset(&resp, 0, sizeof resp);
 437
 438         resp.state           = attr.state;
 439         resp.max_mtu         = attr.max_mtu;
 440         resp.active_mtu      = attr.active_mtu;
 441         resp.gid_tbl_len     = attr.gid_tbl_len;
 442         resp.port_cap_flags  = attr.port_cap_flags;
 443         resp.max_msg_sz      = attr.max_msg_sz;
 444         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 445         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 446         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 447         resp.lid             = attr.lid;
 448         resp.sm_lid          = attr.sm_lid;
 449         resp.lmc             = attr.lmc;
 450         resp.max_vl_num      = attr.max_vl_num;
 451         resp.sm_sl           = attr.sm_sl;
 452         resp.subnet_timeout  = attr.subnet_timeout;
 453         resp.init_type_reply = attr.init_type_reply;
 454         resp.active_width    = attr.active_width;
 455         resp.active_speed    = attr.active_speed;
 456         resp.phys_state      = attr.phys_state;
 457
 458         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 459                          &resp, sizeof resp))
 460                 return -EFAULT;
 461
 462         return in_len;
 463 }
 464
 465 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 466                            const char __user *buf,
 467                            int in_len, int out_len)
 468 {
 469         struct ib_uverbs_alloc_pd      cmd;
 470         struct ib_uverbs_alloc_pd_resp resp;
 471         struct ib_udata                udata;
 472         struct ib_uobject             *uobj;
 473         struct ib_pd                  *pd;
 474         int                            ret;
 475
 476         if (out_len < sizeof resp)
 477                 return -ENOSPC;
 478
 479         if (copy_from_user(&cmd, buf, sizeof cmd))
 480                 return -EFAULT;
 481
 482         INIT_UDATA(&udata, buf + sizeof cmd,
 483                    (unsigned long) cmd.response + sizeof resp,
 484                    in_len - sizeof cmd, out_len - sizeof resp);
 485
 486         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 487         if (!uobj)
 488                 return -ENOMEM;
 489
 490         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 491         down_write(&uobj->mutex);
 492
 493         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 494                                             file->ucontext, &udata);
 495         if (IS_ERR(pd)) {
 496                 ret = PTR_ERR(pd);
 497                 goto err;
 498         }
 499
 500         pd->device  = file->device->ib_dev;
 501         pd->uobject = uobj;
 502         atomic_set(&pd->usecnt, 0);
 503
 504         uobj->object = pd;
 505         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 506         if (ret)
 507                 goto err_idr;
 508
 509         memset(&resp, 0, sizeof resp);
 510         resp.pd_handle = uobj->id;
 511
 512         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 513                          &resp, sizeof resp)) {
 514                 ret = -EFAULT;
 515                 goto err_copy;
 516         }
 517
 518         mutex_lock(&file->mutex);
 519         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 520         mutex_unlock(&file->mutex);
 521
 522         uobj->live = 1;
 523
 524         up_write(&uobj->mutex);
 525
 526         return in_len;
 527
 528 err_copy:
 529         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 530
 531 err_idr:
 532         ib_dealloc_pd(pd);
 533
 534 err:
 535         put_uobj_write(uobj);
 536         return ret;
 537 }
 538
 539 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 540                              const char __user *buf,
 541                              int in_len, int out_len)
 542 {
 543         struct ib_uverbs_dealloc_pd cmd;
 544         struct ib_uobject          *uobj;
 545         int                         ret;
 546
 547         if (copy_from_user(&cmd, buf, sizeof cmd))
 548                 return -EFAULT;
 549
 550         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 551         if (!uobj)
 552                 return -EINVAL;
 553
 554         ret = ib_dealloc_pd(uobj->object);
 555         if (!ret)
 556                 uobj->live = 0;
 557
 558         put_uobj_write(uobj);
 559
 560         if (ret)
 561                 return ret;
 562
 563         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 564
 565         mutex_lock(&file->mutex);
 566         list_del(&uobj->list);
 567         mutex_unlock(&file->mutex);
 568
 569         put_uobj(uobj);
 570
 571         return in_len;
 572 }
 573
 574 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 575                          const char __user *buf, int in_len,
 576                          int out_len)
 577 {
 578         struct ib_uverbs_reg_mr      cmd;
 579         struct ib_uverbs_reg_mr_resp resp;
 580         struct ib_udata              udata;
 581         struct ib_uobject           *uobj;
 582         struct ib_pd                *pd;
 583         struct ib_mr                *mr;
 584         int                          ret;
 585
 586         if (out_len < sizeof resp)
 587                 return -ENOSPC;
 588
 589         if (copy_from_user(&cmd, buf, sizeof cmd))
 590                 return -EFAULT;
 591
 592         INIT_UDATA(&udata, buf + sizeof cmd,
 593                    (unsigned long) cmd.response + sizeof resp,
 594                    in_len - sizeof cmd, out_len - sizeof resp);
 595
 596         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 597                 return -EINVAL;
 598
 599         /*
 600          * Local write permission is required if remote write or
 601          * remote atomic permission is also requested.
 602          */
 603         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 604             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 605                 return -EINVAL;
 606
 607         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 608         if (!uobj)
 609                 return -ENOMEM;
 610
 611         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 612         down_write(&uobj->mutex);
 613
 614         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 615         if (!pd) {
 616                 ret = -EINVAL;
 617                 goto err_free;
 618         }
 619
 620         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 621                                      cmd.access_flags, &udata);
 622         if (IS_ERR(mr)) {
 623                 ret = PTR_ERR(mr);
 624                 goto err_put;
 625         }
 626
 627         mr->device  = pd->device;
 628         mr->pd      = pd;
 629         mr->uobject = uobj;
 630         atomic_inc(&pd->usecnt);
 631         atomic_set(&mr->usecnt, 0);
 632
 633         uobj->object = mr;
 634         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 635         if (ret)
 636                 goto err_unreg;
 637
 638         memset(&resp, 0, sizeof resp);
 639         resp.lkey      = mr->lkey;
 640         resp.rkey      = mr->rkey;
 641         resp.mr_handle = uobj->id;
 642
 643         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 644                          &resp, sizeof resp)) {
 645                 ret = -EFAULT;
 646                 goto err_copy;
 647         }
 648
 649         put_pd_read(pd);
 650
 651         mutex_lock(&file->mutex);
 652         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 653         mutex_unlock(&file->mutex);
 654
 655         uobj->live = 1;
 656
 657         up_write(&uobj->mutex);
 658
 659         return in_len;
 660
 661 err_copy:
 662         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 663
 664 err_unreg:
 665         ib_dereg_mr(mr);
 666
 667 err_put:
 668         put_pd_read(pd);
 669
 670 err_free:
 671         put_uobj_write(uobj);
 672         return ret;
 673 }
 674
 675 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 676                            const char __user *buf, int in_len,
 677                            int out_len)
 678 {
 679         struct ib_uverbs_dereg_mr cmd;
 680         struct ib_mr             *mr;
 681         struct ib_uobject        *uobj;
 682         int                       ret = -EINVAL;
 683
 684         if (copy_from_user(&cmd, buf, sizeof cmd))
 685                 return -EFAULT;
 686
 687         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 688         if (!uobj)
 689                 return -EINVAL;
 690
 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         put_uobj(uobj);
 709
 710         return in_len;
 711 }
 712
 713 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 714                                       const char __user *buf, int in_len,
 715                                       int out_len)
 716 {
 717         struct ib_uverbs_create_comp_channel       cmd;
 718         struct ib_uverbs_create_comp_channel_resp  resp;
 719         struct file                               *filp;
 720
 721         if (out_len < sizeof resp)
 722                 return -ENOSPC;
 723
 724         if (copy_from_user(&cmd, buf, sizeof cmd))
 725                 return -EFAULT;
 726
 727         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 728         if (IS_ERR(filp))
 729                 return PTR_ERR(filp);
 730
 731         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 732                          &resp, sizeof resp)) {
 733                 put_unused_fd(resp.fd);
 734                 fput(filp);
 735                 return -EFAULT;
 736         }
 737
 738         fd_install(resp.fd, filp);
 739         return in_len;
 740 }
 741
 742 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 743                             const char __user *buf, int in_len,
 744                             int out_len)
 745 {
 746         struct ib_uverbs_create_cq      cmd;
 747         struct ib_uverbs_create_cq_resp resp;
 748         struct ib_udata                 udata;
 749         struct ib_ucq_object           *obj;
 750         struct ib_uverbs_event_file    *ev_file = NULL;
 751         struct ib_cq                   *cq;
 752         int                             ret;
 753
 754         if (out_len < sizeof resp)
 755                 return -ENOSPC;
 756
 757         if (copy_from_user(&cmd, buf, sizeof cmd))
 758                 return -EFAULT;
 759
 760         INIT_UDATA(&udata, buf + sizeof cmd,
 761                    (unsigned long) cmd.response + sizeof resp,
 762                    in_len - sizeof cmd, out_len - sizeof resp);
 763
 764         if (cmd.comp_vector >= file->device->num_comp_vectors)
 765                 return -EINVAL;
 766
 767         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 768         if (!obj)
 769                 return -ENOMEM;
 770
 771         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 772         down_write(&obj->uobject.mutex);
 773
 774         if (cmd.comp_channel >= 0) {
 775                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 776                 if (!ev_file) {
 777                         ret = -EINVAL;
 778                         goto err;
 779                 }
 780         }
 781
 782         obj->uverbs_file           = file;
 783         obj->comp_events_reported  = 0;
 784         obj->async_events_reported = 0;
 785         INIT_LIST_HEAD(&obj->comp_list);
 786         INIT_LIST_HEAD(&obj->async_list);
 787
 788         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 789                                              cmd.comp_vector,
 790                                              file->ucontext, &udata);
 791         if (IS_ERR(cq)) {
 792                 ret = PTR_ERR(cq);
 793                 goto err_file;
 794         }
 795
 796         cq->device        = file->device->ib_dev;
 797         cq->uobject       = &obj->uobject;
 798         cq->comp_handler  = ib_uverbs_comp_handler;
 799         cq->event_handler = ib_uverbs_cq_event_handler;
 800         cq->cq_context    = ev_file;
 801         atomic_set(&cq->usecnt, 0);
 802
 803         obj->uobject.object = cq;
 804         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 805         if (ret)
 806                 goto err_free;
 807
 808         memset(&resp, 0, sizeof resp);
 809         resp.cq_handle = obj->uobject.id;
 810         resp.cqe       = cq->cqe;
 811
 812         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 813                          &resp, sizeof resp)) {
 814                 ret = -EFAULT;
 815                 goto err_copy;
 816         }
 817
 818         mutex_lock(&file->mutex);
 819         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 820         mutex_unlock(&file->mutex);
 821
 822         obj->uobject.live = 1;
 823
 824         up_write(&obj->uobject.mutex);
 825
 826         return in_len;
 827
 828 err_copy:
 829         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 830
 831 err_free:
 832         ib_destroy_cq(cq);
 833
 834 err_file:
 835         if (ev_file)
 836                 ib_uverbs_release_ucq(file, ev_file, obj);
 837
 838 err:
 839         put_uobj_write(&obj->uobject);
 840         return ret;
 841 }
 842
 843 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 844                             const char __user *buf, int in_len,
 845                             int out_len)
 846 {
 847         struct ib_uverbs_resize_cq      cmd;
 848         struct ib_uverbs_resize_cq_resp resp;
 849         struct ib_udata                 udata;
 850         struct ib_cq                    *cq;
 851         int                             ret = -EINVAL;
 852
 853         if (copy_from_user(&cmd, buf, sizeof cmd))
 854                 return -EFAULT;
 855
 856         INIT_UDATA(&udata, buf + sizeof cmd,
 857                    (unsigned long) cmd.response + sizeof resp,
 858                    in_len - sizeof cmd, out_len - sizeof resp);
 859
 860         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 861         if (!cq)
 862                 return -EINVAL;
 863
 864         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 865         if (ret)
 866                 goto out;
 867
 868         resp.cqe = cq->cqe;
 869
 870         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 871                          &resp, sizeof resp.cqe))
 872                 ret = -EFAULT;
 873
 874 out:
 875         put_cq_read(cq);
 876
 877         return ret ? ret : in_len;
 878 }
 879
 880 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 881                           const char __user *buf, int in_len,
 882                           int out_len)
 883 {
 884         struct ib_uverbs_poll_cq       cmd;
 885         struct ib_uverbs_poll_cq_resp *resp;
 886         struct ib_cq                  *cq;
 887         struct ib_wc                  *wc;
 888         int                            ret = 0;
 889         int                            i;
 890         int                            rsize;
 891
 892         if (copy_from_user(&cmd, buf, sizeof cmd))
 893                 return -EFAULT;
 894
 895         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 896         if (!wc)
 897                 return -ENOMEM;
 898
 899         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 900         resp = kmalloc(rsize, GFP_KERNEL);
 901         if (!resp) {
 902                 ret = -ENOMEM;
 903                 goto out_wc;
 904         }
 905
 906         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 907         if (!cq) {
 908                 ret = -EINVAL;
 909                 goto out;
 910         }
 911
 912         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 913
 914         put_cq_read(cq);
 915
 916         for (i = 0; i < resp->count; i++) {
 917                 resp->wc[i].wr_id          = wc[i].wr_id;
 918                 resp->wc[i].status         = wc[i].status;
 919                 resp->wc[i].opcode         = wc[i].opcode;
 920                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 921                 resp->wc[i].byte_len       = wc[i].byte_len;
 922                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 923                 resp->wc[i].qp_num         = wc[i].qp->qp_num;
 924                 resp->wc[i].src_qp         = wc[i].src_qp;
 925                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 926                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 927                 resp->wc[i].slid           = wc[i].slid;
 928                 resp->wc[i].sl             = wc[i].sl;
 929                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 930                 resp->wc[i].port_num       = wc[i].port_num;
 931         }
 932
 933         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 934                 ret = -EFAULT;
 935
 936 out:
 937         kfree(resp);
 938
 939 out_wc:
 940         kfree(wc);
 941         return ret ? ret : in_len;
 942 }
 943
 944 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 945                                 const char __user *buf, int in_len,
 946                                 int out_len)
 947 {
 948         struct ib_uverbs_req_notify_cq cmd;
 949         struct ib_cq                  *cq;
 950
 951         if (copy_from_user(&cmd, buf, sizeof cmd))
 952                 return -EFAULT;
 953
 954         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 955         if (!cq)
 956                 return -EINVAL;
 957
 958         ib_req_notify_cq(cq, cmd.solicited_only ?
 959                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 960
 961         put_cq_read(cq);
 962
 963         return in_len;
 964 }
 965
 966 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 967                              const char __user *buf, int in_len,
 968                              int out_len)
 969 {
 970         struct ib_uverbs_destroy_cq      cmd;
 971         struct ib_uverbs_destroy_cq_resp resp;
 972         struct ib_uobject               *uobj;
 973         struct ib_cq                    *cq;
 974         struct ib_ucq_object            *obj;
 975         struct ib_uverbs_event_file     *ev_file;
 976         int                              ret = -EINVAL;
 977
 978         if (copy_from_user(&cmd, buf, sizeof cmd))
 979                 return -EFAULT;
 980
 981         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 982         if (!uobj)
 983                 return -EINVAL;
 984         cq      = uobj->object;
 985         ev_file = cq->cq_context;
 986         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
 987
 988         ret = ib_destroy_cq(cq);
 989         if (!ret)
 990                 uobj->live = 0;
 991
 992         put_uobj_write(uobj);
 993
 994         if (ret)
 995                 return ret;
 996
 997         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
 998
 999         mutex_lock(&file->mutex);
1000         list_del(&uobj->list);
1001         mutex_unlock(&file->mutex);
1002
1003         ib_uverbs_release_ucq(file, ev_file, obj);
1004
1005         memset(&resp, 0, sizeof resp);
1006         resp.comp_events_reported  = obj->comp_events_reported;
1007         resp.async_events_reported = obj->async_events_reported;
1008
1009         put_uobj(uobj);
1010
1011         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1012                          &resp, sizeof resp))
1013                 return -EFAULT;
1014
1015         return in_len;
1016 }
1017
1018 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1019                             const char __user *buf, int in_len,
1020                             int out_len)
1021 {
1022         struct ib_uverbs_create_qp      cmd;
1023         struct ib_uverbs_create_qp_resp resp;
1024         struct ib_udata                 udata;
1025         struct ib_uqp_object           *obj;
1026         struct ib_pd                   *pd;
1027         struct ib_cq                   *scq, *rcq;
1028         struct ib_srq                  *srq;
1029         struct ib_qp                   *qp;
1030         struct ib_qp_init_attr          attr;
1031         int ret;
1032
1033         if (out_len < sizeof resp)
1034                 return -ENOSPC;
1035
1036         if (copy_from_user(&cmd, buf, sizeof cmd))
1037                 return -EFAULT;
1038
1039         INIT_UDATA(&udata, buf + sizeof cmd,
1040                    (unsigned long) cmd.response + sizeof resp,
1041                    in_len - sizeof cmd, out_len - sizeof resp);
1042
1043         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1044         if (!obj)
1045                 return -ENOMEM;
1046
1047         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1048         down_write(&obj->uevent.uobject.mutex);
1049
1050         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1051         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1052         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1053         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1054                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1055
1056         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1057                 ret = -EINVAL;
1058                 goto err_put;
1059         }
1060
1061         attr.event_handler = ib_uverbs_qp_event_handler;
1062         attr.qp_context    = file;
1063         attr.send_cq       = scq;
1064         attr.recv_cq       = rcq;
1065         attr.srq           = srq;
1066         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1067         attr.qp_type       = cmd.qp_type;
1068
1069         attr.cap.max_send_wr     = cmd.max_send_wr;
1070         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1071         attr.cap.max_send_sge    = cmd.max_send_sge;
1072         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1073         attr.cap.max_inline_data = cmd.max_inline_data;
1074
1075         obj->uevent.events_reported     = 0;
1076         INIT_LIST_HEAD(&obj->uevent.event_list);
1077         INIT_LIST_HEAD(&obj->mcast_list);
1078
1079         qp = pd->device->create_qp(pd, &attr, &udata);
1080         if (IS_ERR(qp)) {
1081                 ret = PTR_ERR(qp);
1082                 goto err_put;
1083         }
1084
1085         qp->device        = pd->device;
1086         qp->pd            = pd;
1087         qp->send_cq       = attr.send_cq;
1088         qp->recv_cq       = attr.recv_cq;
1089         qp->srq           = attr.srq;
1090         qp->uobject       = &obj->uevent.uobject;
1091         qp->event_handler = attr.event_handler;
1092         qp->qp_context    = attr.qp_context;
1093         qp->qp_type       = attr.qp_type;
1094         atomic_inc(&pd->usecnt);
1095         atomic_inc(&attr.send_cq->usecnt);
1096         atomic_inc(&attr.recv_cq->usecnt);
1097         if (attr.srq)
1098                 atomic_inc(&attr.srq->usecnt);
1099
1100         obj->uevent.uobject.object = qp;
1101         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1102         if (ret)
1103                 goto err_destroy;
1104
1105         memset(&resp, 0, sizeof resp);
1106         resp.qpn             = qp->qp_num;
1107         resp.qp_handle       = obj->uevent.uobject.id;
1108         resp.max_recv_sge    = attr.cap.max_recv_sge;
1109         resp.max_send_sge    = attr.cap.max_send_sge;
1110         resp.max_recv_wr     = attr.cap.max_recv_wr;
1111         resp.max_send_wr     = attr.cap.max_send_wr;
1112         resp.max_inline_data = attr.cap.max_inline_data;
1113
1114         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1115                          &resp, sizeof resp)) {
1116                 ret = -EFAULT;
1117                 goto err_copy;
1118         }
1119
1120         put_pd_read(pd);
1121         put_cq_read(scq);
1122         if (rcq != scq)
1123                 put_cq_read(rcq);
1124         if (srq)
1125                 put_srq_read(srq);
1126
1127         mutex_lock(&file->mutex);
1128         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1129         mutex_unlock(&file->mutex);
1130
1131         obj->uevent.uobject.live = 1;
1132
1133         up_write(&obj->uevent.uobject.mutex);
1134
1135         return in_len;
1136
1137 err_copy:
1138         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1139
1140 err_destroy:
1141         ib_destroy_qp(qp);
1142
1143 err_put:
1144         if (pd)
1145                 put_pd_read(pd);
1146         if (scq)
1147                 put_cq_read(scq);
1148         if (rcq && rcq != scq)
1149                 put_cq_read(rcq);
1150         if (srq)
1151                 put_srq_read(srq);
1152
1153         put_uobj_write(&obj->uevent.uobject);
1154         return ret;
1155 }
1156
1157 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1158                            const char __user *buf, int in_len,
1159                            int out_len)
1160 {
1161         struct ib_uverbs_query_qp      cmd;
1162         struct ib_uverbs_query_qp_resp resp;
1163         struct ib_qp                   *qp;
1164         struct ib_qp_attr              *attr;
1165         struct ib_qp_init_attr         *init_attr;
1166         int                            ret;
1167
1168         if (copy_from_user(&cmd, buf, sizeof cmd))
1169                 return -EFAULT;
1170
1171         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1172         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1173         if (!attr || !init_attr) {
1174                 ret = -ENOMEM;
1175                 goto out;
1176         }
1177
1178         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1179         if (!qp) {
1180                 ret = -EINVAL;
1181                 goto out;
1182         }
1183
1184         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1185
1186         put_qp_read(qp);
1187
1188         if (ret)
1189                 goto out;
1190
1191         memset(&resp, 0, sizeof resp);
1192
1193         resp.qp_state               = attr->qp_state;
1194         resp.cur_qp_state           = attr->cur_qp_state;
1195         resp.path_mtu               = attr->path_mtu;
1196         resp.path_mig_state         = attr->path_mig_state;
1197         resp.qkey                   = attr->qkey;
1198         resp.rq_psn                 = attr->rq_psn;
1199         resp.sq_psn                 = attr->sq_psn;
1200         resp.dest_qp_num            = attr->dest_qp_num;
1201         resp.qp_access_flags        = attr->qp_access_flags;
1202         resp.pkey_index             = attr->pkey_index;
1203         resp.alt_pkey_index         = attr->alt_pkey_index;
1204         resp.sq_draining            = attr->sq_draining;
1205         resp.max_rd_atomic          = attr->max_rd_atomic;
1206         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1207         resp.min_rnr_timer          = attr->min_rnr_timer;
1208         resp.port_num               = attr->port_num;
1209         resp.timeout                = attr->timeout;
1210         resp.retry_cnt              = attr->retry_cnt;
1211         resp.rnr_retry              = attr->rnr_retry;
1212         resp.alt_port_num           = attr->alt_port_num;
1213         resp.alt_timeout            = attr->alt_timeout;
1214
1215         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1216         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1217         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1218         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1219         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1220         resp.dest.dlid              = attr->ah_attr.dlid;
1221         resp.dest.sl                = attr->ah_attr.sl;
1222         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1223         resp.dest.static_rate       = attr->ah_attr.static_rate;
1224         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1225         resp.dest.port_num          = attr->ah_attr.port_num;
1226
1227         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1228         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1229         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1230         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1231         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1232         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1233         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1234         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1235         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1236         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1237         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1238
1239         resp.max_send_wr            = init_attr->cap.max_send_wr;
1240         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1241         resp.max_send_sge           = init_attr->cap.max_send_sge;
1242         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1243         resp.max_inline_data        = init_attr->cap.max_inline_data;
1244         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1245
1246         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1247                          &resp, sizeof resp))
1248                 ret = -EFAULT;
1249
1250 out:
1251         kfree(attr);
1252         kfree(init_attr);
1253
1254         return ret ? ret : in_len;
1255 }
1256
1257 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1258                             const char __user *buf, int in_len,
1259                             int out_len)
1260 {
1261         struct ib_uverbs_modify_qp cmd;
1262         struct ib_udata            udata;
1263         struct ib_qp              *qp;
1264         struct ib_qp_attr         *attr;
1265         int                        ret;
1266
1267         if (copy_from_user(&cmd, buf, sizeof cmd))
1268                 return -EFAULT;
1269
1270         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1271                    out_len);
1272
1273         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1274         if (!attr)
1275                 return -ENOMEM;
1276
1277         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1278         if (!qp) {
1279                 ret = -EINVAL;
1280                 goto out;
1281         }
1282
1283         attr->qp_state            = cmd.qp_state;
1284         attr->cur_qp_state        = cmd.cur_qp_state;
1285         attr->path_mtu            = cmd.path_mtu;
1286         attr->path_mig_state      = cmd.path_mig_state;
1287         attr->qkey                = cmd.qkey;
1288         attr->rq_psn              = cmd.rq_psn;
1289         attr->sq_psn              = cmd.sq_psn;
1290         attr->dest_qp_num         = cmd.dest_qp_num;
1291         attr->qp_access_flags     = cmd.qp_access_flags;
1292         attr->pkey_index          = cmd.pkey_index;
1293         attr->alt_pkey_index      = cmd.alt_pkey_index;
1294         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1295         attr->max_rd_atomic       = cmd.max_rd_atomic;
1296         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1297         attr->min_rnr_timer       = cmd.min_rnr_timer;
1298         attr->port_num            = cmd.port_num;
1299         attr->timeout             = cmd.timeout;
1300         attr->retry_cnt           = cmd.retry_cnt;
1301         attr->rnr_retry           = cmd.rnr_retry;
1302         attr->alt_port_num        = cmd.alt_port_num;
1303         attr->alt_timeout         = cmd.alt_timeout;
1304
1305         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1306         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1307         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1308         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1309         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1310         attr->ah_attr.dlid                  = cmd.dest.dlid;
1311         attr->ah_attr.sl                    = cmd.dest.sl;
1312         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1313         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1314         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1315         attr->ah_attr.port_num              = cmd.dest.port_num;
1316
1317         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1318         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1319         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1320         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1321         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1322         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1323         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1324         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1325         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1326         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1327         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1328
1329         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1330
1331         put_qp_read(qp);
1332
1333         if (ret)
1334                 goto out;
1335
1336         ret = in_len;
1337
1338 out:
1339         kfree(attr);
1340
1341         return ret;
1342 }
1343
1344 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1345                              const char __user *buf, int in_len,
1346                              int out_len)
1347 {
1348         struct ib_uverbs_destroy_qp      cmd;
1349         struct ib_uverbs_destroy_qp_resp resp;
1350         struct ib_uobject               *uobj;
1351         struct ib_qp                    *qp;
1352         struct ib_uqp_object            *obj;
1353         int                              ret = -EINVAL;
1354
1355         if (copy_from_user(&cmd, buf, sizeof cmd))
1356                 return -EFAULT;
1357
1358         memset(&resp, 0, sizeof resp);
1359
1360         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1361         if (!uobj)
1362                 return -EINVAL;
1363         qp  = uobj->object;
1364         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1365
1366         if (!list_empty(&obj->mcast_list)) {
1367                 put_uobj_write(uobj);
1368                 return -EBUSY;
1369         }
1370
1371         ret = ib_destroy_qp(qp);
1372         if (!ret)
1373                 uobj->live = 0;
1374
1375         put_uobj_write(uobj);
1376
1377         if (ret)
1378                 return ret;
1379
1380         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1381
1382         mutex_lock(&file->mutex);
1383         list_del(&uobj->list);
1384         mutex_unlock(&file->mutex);
1385
1386         ib_uverbs_release_uevent(file, &obj->uevent);
1387
1388         resp.events_reported = obj->uevent.events_reported;
1389
1390         put_uobj(uobj);
1391
1392         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1393                          &resp, sizeof resp))
1394                 return -EFAULT;
1395
1396         return in_len;
1397 }
1398
1399 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1400                             const char __user *buf, int in_len,
1401                             int out_len)
1402 {
1403         struct ib_uverbs_post_send      cmd;
1404         struct ib_uverbs_post_send_resp resp;
1405         struct ib_uverbs_send_wr       *user_wr;
1406         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1407         struct ib_qp                   *qp;
1408         int                             i, sg_ind;
1409         int                             is_ud;
1410         ssize_t                         ret = -EINVAL;
1411
1412         if (copy_from_user(&cmd, buf, sizeof cmd))
1413                 return -EFAULT;
1414
1415         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1416             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1417                 return -EINVAL;
1418
1419         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1420                 return -EINVAL;
1421
1422         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1423         if (!user_wr)
1424                 return -ENOMEM;
1425
1426         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1427         if (!qp)
1428                 goto out;
1429
1430         is_ud = qp->qp_type == IB_QPT_UD;
1431         sg_ind = 0;
1432         last = NULL;
1433         for (i = 0; i < cmd.wr_count; ++i) {
1434                 if (copy_from_user(user_wr,
1435                                    buf + sizeof cmd + i * cmd.wqe_size,
1436                                    cmd.wqe_size)) {
1437                         ret = -EFAULT;
1438                         goto out_put;
1439                 }
1440
1441                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1442                         ret = -EINVAL;
1443                         goto out_put;
1444                 }
1445
1446                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1447                                user_wr->num_sge * sizeof (struct ib_sge),
1448                                GFP_KERNEL);
1449                 if (!next) {
1450                         ret = -ENOMEM;
1451                         goto out_put;
1452                 }
1453
1454                 if (!last)
1455                         wr = next;
1456                 else
1457                         last->next = next;
1458                 last = next;
1459
1460                 next->next       = NULL;
1461                 next->wr_id      = user_wr->wr_id;
1462                 next->num_sge    = user_wr->num_sge;
1463                 next->opcode     = user_wr->opcode;
1464                 next->send_flags = user_wr->send_flags;
1465                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1466
1467                 if (is_ud) {
1468                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1469                                                      file->ucontext);
1470                         if (!next->wr.ud.ah) {
1471                                 ret = -EINVAL;
1472                                 goto out_put;
1473                         }
1474                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1475                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1476                 } else {
1477                         switch (next->opcode) {
1478                         case IB_WR_RDMA_WRITE:
1479                         case IB_WR_RDMA_WRITE_WITH_IMM:
1480                         case IB_WR_RDMA_READ:
1481                                 next->wr.rdma.remote_addr =
1482                                         user_wr->wr.rdma.remote_addr;
1483                                 next->wr.rdma.rkey        =
1484                                         user_wr->wr.rdma.rkey;
1485                                 break;
1486                         case IB_WR_ATOMIC_CMP_AND_SWP:
1487                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1488                                 next->wr.atomic.remote_addr =
1489                                         user_wr->wr.atomic.remote_addr;
1490                                 next->wr.atomic.compare_add =
1491                                         user_wr->wr.atomic.compare_add;
1492                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1493                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1494                                 break;
1495                         default:
1496                                 break;
1497                         }
1498                 }
1499
1500                 if (next->num_sge) {
1501                         next->sg_list = (void *) next +
1502                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1503                         if (copy_from_user(next->sg_list,
1504                                            buf + sizeof cmd +
1505                                            cmd.wr_count * cmd.wqe_size +
1506                                            sg_ind * sizeof (struct ib_sge),
1507                                            next->num_sge * sizeof (struct ib_sge))) {
1508                                 ret = -EFAULT;
1509                                 goto out_put;
1510                         }
1511                         sg_ind += next->num_sge;
1512                 } else
1513                         next->sg_list = NULL;
1514         }
1515
1516         resp.bad_wr = 0;
1517         ret = qp->device->post_send(qp, wr, &bad_wr);
1518         if (ret)
1519                 for (next = wr; next; next = next->next) {
1520                         ++resp.bad_wr;
1521                         if (next == bad_wr)
1522                                 break;
1523                 }
1524
1525         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1526                          &resp, sizeof resp))
1527                 ret = -EFAULT;
1528
1529 out_put:
1530         put_qp_read(qp);
1531
1532         while (wr) {
1533                 if (is_ud && wr->wr.ud.ah)
1534                         put_ah_read(wr->wr.ud.ah);
1535                 next = wr->next;
1536                 kfree(wr);
1537                 wr = next;
1538         }
1539
1540 out:
1541         kfree(user_wr);
1542
1543         return ret ? ret : in_len;
1544 }
1545
1546 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1547                                                     int in_len,
1548                                                     u32 wr_count,
1549                                                     u32 sge_count,
1550                                                     u32 wqe_size)
1551 {
1552         struct ib_uverbs_recv_wr *user_wr;
1553         struct ib_recv_wr        *wr = NULL, *last, *next;
1554         int                       sg_ind;
1555         int                       i;
1556         int                       ret;
1557
1558         if (in_len < wqe_size * wr_count +
1559             sge_count * sizeof (struct ib_uverbs_sge))
1560                 return ERR_PTR(-EINVAL);
1561
1562         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1563                 return ERR_PTR(-EINVAL);
1564
1565         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1566         if (!user_wr)
1567                 return ERR_PTR(-ENOMEM);
1568
1569         sg_ind = 0;
1570         last = NULL;
1571         for (i = 0; i < wr_count; ++i) {
1572                 if (copy_from_user(user_wr, buf + i * wqe_size,
1573                                    wqe_size)) {
1574                         ret = -EFAULT;
1575                         goto err;
1576                 }
1577
1578                 if (user_wr->num_sge + sg_ind > sge_count) {
1579                         ret = -EINVAL;
1580                         goto err;
1581                 }
1582
1583                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1584                                user_wr->num_sge * sizeof (struct ib_sge),
1585                                GFP_KERNEL);
1586                 if (!next) {
1587                         ret = -ENOMEM;
1588                         goto err;
1589                 }
1590
1591                 if (!last)
1592                         wr = next;
1593                 else
1594                         last->next = next;
1595                 last = next;
1596
1597                 next->next       = NULL;
1598                 next->wr_id      = user_wr->wr_id;
1599                 next->num_sge    = user_wr->num_sge;
1600
1601                 if (next->num_sge) {
1602                         next->sg_list = (void *) next +
1603                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1604                         if (copy_from_user(next->sg_list,
1605                                            buf + wr_count * wqe_size +
1606                                            sg_ind * sizeof (struct ib_sge),
1607                                            next->num_sge * sizeof (struct ib_sge))) {
1608                                 ret = -EFAULT;
1609                                 goto err;
1610                         }
1611                         sg_ind += next->num_sge;
1612                 } else
1613                         next->sg_list = NULL;
1614         }
1615
1616         kfree(user_wr);
1617         return wr;
1618
1619 err:
1620         kfree(user_wr);
1621
1622         while (wr) {
1623                 next = wr->next;
1624                 kfree(wr);
1625                 wr = next;
1626         }
1627
1628         return ERR_PTR(ret);
1629 }
1630
1631 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1632                             const char __user *buf, int in_len,
1633                             int out_len)
1634 {
1635         struct ib_uverbs_post_recv      cmd;
1636         struct ib_uverbs_post_recv_resp resp;
1637         struct ib_recv_wr              *wr, *next, *bad_wr;
1638         struct ib_qp                   *qp;
1639         ssize_t                         ret = -EINVAL;
1640
1641         if (copy_from_user(&cmd, buf, sizeof cmd))
1642                 return -EFAULT;
1643
1644         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1645                                        in_len - sizeof cmd, cmd.wr_count,
1646                                        cmd.sge_count, cmd.wqe_size);
1647         if (IS_ERR(wr))
1648                 return PTR_ERR(wr);
1649
1650         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1651         if (!qp)
1652                 goto out;
1653
1654         resp.bad_wr = 0;
1655         ret = qp->device->post_recv(qp, wr, &bad_wr);
1656
1657         put_qp_read(qp);
1658
1659         if (ret)
1660                 for (next = wr; next; next = next->next) {
1661                         ++resp.bad_wr;
1662                         if (next == bad_wr)
1663                                 break;
1664                 }
1665
1666         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1667                          &resp, sizeof resp))
1668                 ret = -EFAULT;
1669
1670 out:
1671         while (wr) {
1672                 next = wr->next;
1673                 kfree(wr);
1674                 wr = next;
1675         }
1676
1677         return ret ? ret : in_len;
1678 }
1679
1680 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1681                                 const char __user *buf, int in_len,
1682                                 int out_len)
1683 {
1684         struct ib_uverbs_post_srq_recv      cmd;
1685         struct ib_uverbs_post_srq_recv_resp resp;
1686         struct ib_recv_wr                  *wr, *next, *bad_wr;
1687         struct ib_srq                      *srq;
1688         ssize_t                             ret = -EINVAL;
1689
1690         if (copy_from_user(&cmd, buf, sizeof cmd))
1691                 return -EFAULT;
1692
1693         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1694                                        in_len - sizeof cmd, cmd.wr_count,
1695                                        cmd.sge_count, cmd.wqe_size);
1696         if (IS_ERR(wr))
1697                 return PTR_ERR(wr);
1698
1699         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1700         if (!srq)
1701                 goto out;
1702
1703         resp.bad_wr = 0;
1704         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1705
1706         put_srq_read(srq);
1707
1708         if (ret)
1709                 for (next = wr; next; next = next->next) {
1710                         ++resp.bad_wr;
1711                         if (next == bad_wr)
1712                                 break;
1713                 }
1714
1715         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1716                          &resp, sizeof resp))
1717                 ret = -EFAULT;
1718
1719 out:
1720         while (wr) {
1721                 next = wr->next;
1722                 kfree(wr);
1723                 wr = next;
1724         }
1725
1726         return ret ? ret : in_len;
1727 }
1728
1729 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1730                             const char __user *buf, int in_len,
1731                             int out_len)
1732 {
1733         struct ib_uverbs_create_ah       cmd;
1734         struct ib_uverbs_create_ah_resp  resp;
1735         struct ib_uobject               *uobj;
1736         struct ib_pd                    *pd;
1737         struct ib_ah                    *ah;
1738         struct ib_ah_attr               attr;
1739         int ret;
1740
1741         if (out_len < sizeof resp)
1742                 return -ENOSPC;
1743
1744         if (copy_from_user(&cmd, buf, sizeof cmd))
1745                 return -EFAULT;
1746
1747         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1748         if (!uobj)
1749                 return -ENOMEM;
1750
1751         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1752         down_write(&uobj->mutex);
1753
1754         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1755         if (!pd) {
1756                 ret = -EINVAL;
1757                 goto err;
1758         }
1759
1760         attr.dlid              = cmd.attr.dlid;
1761         attr.sl                = cmd.attr.sl;
1762         attr.src_path_bits     = cmd.attr.src_path_bits;
1763         attr.static_rate       = cmd.attr.static_rate;
1764         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1765         attr.port_num          = cmd.attr.port_num;
1766         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1767         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1768         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1769         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1770         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1771
1772         ah = ib_create_ah(pd, &attr);
1773         if (IS_ERR(ah)) {
1774                 ret = PTR_ERR(ah);
1775                 goto err_put;
1776         }
1777
1778         ah->uobject  = uobj;
1779         uobj->object = ah;
1780
1781         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1782         if (ret)
1783                 goto err_destroy;
1784
1785         resp.ah_handle = uobj->id;
1786
1787         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1788                          &resp, sizeof resp)) {
1789                 ret = -EFAULT;
1790                 goto err_copy;
1791         }
1792
1793         put_pd_read(pd);
1794
1795         mutex_lock(&file->mutex);
1796         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1797         mutex_unlock(&file->mutex);
1798
1799         uobj->live = 1;
1800
1801         up_write(&uobj->mutex);
1802
1803         return in_len;
1804
1805 err_copy:
1806         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1807
1808 err_destroy:
1809         ib_destroy_ah(ah);
1810
1811 err_put:
1812         put_pd_read(pd);
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, cmd.user_handle, file->ucontext, &srq_lock_key);
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_put;
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_put:
2033         put_pd_read(pd);
2034
2035 err:
2036         put_uobj_write(&obj->uobject);
2037         return ret;
2038 }
2039
2040 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2041                              const char __user *buf, int in_len,
2042                              int out_len)
2043 {
2044         struct ib_uverbs_modify_srq cmd;
2045         struct ib_udata             udata;
2046         struct ib_srq              *srq;
2047         struct ib_srq_attr          attr;
2048         int                         ret;
2049
2050         if (copy_from_user(&cmd, buf, sizeof cmd))
2051                 return -EFAULT;
2052
2053         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2054                    out_len);
2055
2056         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2057         if (!srq)
2058                 return -EINVAL;
2059
2060         attr.max_wr    = cmd.max_wr;
2061         attr.srq_limit = cmd.srq_limit;
2062
2063         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2064
2065         put_srq_read(srq);
2066
2067         return ret ? ret : in_len;
2068 }
2069
2070 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2071                             const char __user *buf,
2072                             int in_len, int out_len)
2073 {
2074         struct ib_uverbs_query_srq      cmd;
2075         struct ib_uverbs_query_srq_resp resp;
2076         struct ib_srq_attr              attr;
2077         struct ib_srq                   *srq;
2078         int                             ret;
2079
2080         if (out_len < sizeof resp)
2081                 return -ENOSPC;
2082
2083         if (copy_from_user(&cmd, buf, sizeof cmd))
2084                 return -EFAULT;
2085
2086         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2087         if (!srq)
2088                 return -EINVAL;
2089
2090         ret = ib_query_srq(srq, &attr);
2091
2092         put_srq_read(srq);
2093
2094         if (ret)
2095                 return ret;
2096
2097         memset(&resp, 0, sizeof resp);
2098
2099         resp.max_wr    = attr.max_wr;
2100         resp.max_sge   = attr.max_sge;
2101         resp.srq_limit = attr.srq_limit;
2102
2103         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2104                          &resp, sizeof resp))
2105                 return -EFAULT;
2106
2107         return in_len;
2108 }
2109
2110 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2111                               const char __user *buf, int in_len,
2112                               int out_len)
2113 {
2114         struct ib_uverbs_destroy_srq      cmd;
2115         struct ib_uverbs_destroy_srq_resp resp;
2116         struct ib_uobject                *uobj;
2117         struct ib_srq                    *srq;
2118         struct ib_uevent_object          *obj;
2119         int                               ret = -EINVAL;
2120
2121         if (copy_from_user(&cmd, buf, sizeof cmd))
2122                 return -EFAULT;
2123
2124         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2125         if (!uobj)
2126                 return -EINVAL;
2127         srq = uobj->object;
2128         obj = container_of(uobj, struct ib_uevent_object, uobject);
2129
2130         ret = ib_destroy_srq(srq);
2131         if (!ret)
2132                 uobj->live = 0;
2133
2134         put_uobj_write(uobj);
2135
2136         if (ret)
2137                 return ret;
2138
2139         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2140
2141         mutex_lock(&file->mutex);
2142         list_del(&uobj->list);
2143         mutex_unlock(&file->mutex);
2144
2145         ib_uverbs_release_uevent(file, obj);
2146
2147         memset(&resp, 0, sizeof resp);
2148         resp.events_reported = obj->events_reported;
2149
2150         put_uobj(uobj);
2151
2152         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2153                          &resp, sizeof resp))
2154                 ret = -EFAULT;
2155
2156         return ret ? ret : in_len;
2157 }