drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/file.h>
  37 #include <linux/fs.h>
  38 #include <linux/slab.h>
  39
  40 #include <asm/uaccess.h>
  41
  42 #include "uverbs.h"
  43
  44 static struct lock_class_key pd_lock_key;
  45 static struct lock_class_key mr_lock_key;
  46 static struct lock_class_key cq_lock_key;
  47 static struct lock_class_key qp_lock_key;
  48 static struct lock_class_key ah_lock_key;
  49 static struct lock_class_key srq_lock_key;
  50
  51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  52         do {                                                            \
  53                 (udata)->inbuf  = (void __user *) (ibuf);               \
  54                 (udata)->outbuf = (void __user *) (obuf);               \
  55                 (udata)->inlen  = (ilen);                               \
  56                 (udata)->outlen = (olen);                               \
  57         } while (0)
  58
  59 /*
  60  * The ib_uobject locking scheme is as follows:
  61  *
  62  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  63  *   needs to be held during all idr operations.  When an object is
  64  *   looked up, a reference must be taken on the object's kref before
  65  *   dropping this lock.
  66  *
  67  * - Each object also has an rwsem.  This rwsem must be held for
  68  *   reading while an operation that uses the object is performed.
  69  *   For example, while registering an MR, the associated PD's
  70  *   uobject.mutex must be held for reading.  The rwsem must be held
  71  *   for writing while initializing or destroying an object.
  72  *
  73  * - In addition, each object has a "live" flag.  If this flag is not
  74  *   set, then lookups of the object will fail even if it is found in
  75  *   the idr.  This handles a reader that blocks and does not acquire
  76  *   the rwsem until after the object is destroyed.  The destroy
  77  *   operation will set the live flag to 0 and then drop the rwsem;
  78  *   this will allow the reader to acquire the rwsem, see that the
  79  *   live flag is 0, and then drop the rwsem and its reference to
  80  *   object.  The underlying storage will not be freed until the last
  81  *   reference to the object is dropped.
  82  */
  83
  84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  85                       struct ib_ucontext *context, struct lock_class_key *key)
  86 {
  87         uobj->user_handle = user_handle;
  88         uobj->context     = context;
  89         kref_init(&uobj->ref);
  90         init_rwsem(&uobj->mutex);
  91         lockdep_set_class(&uobj->mutex, key);
  92         uobj->live        = 0;
  93 }
  94
  95 static void release_uobj(struct kref *kref)
  96 {
  97         kfree(container_of(kref, struct ib_uobject, ref));
  98 }
  99
 100 static void put_uobj(struct ib_uobject *uobj)
 101 {
 102         kref_put(&uobj->ref, release_uobj);
 103 }
 104
 105 static void put_uobj_read(struct ib_uobject *uobj)
 106 {
 107         up_read(&uobj->mutex);
 108         put_uobj(uobj);
 109 }
 110
 111 static void put_uobj_write(struct ib_uobject *uobj)
 112 {
 113         up_write(&uobj->mutex);
 114         put_uobj(uobj);
 115 }
 116
 117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 118 {
 119         int ret;
 120
 121 retry:
 122         if (!idr_pre_get(idr, GFP_KERNEL))
 123                 return -ENOMEM;
 124
 125         spin_lock(&ib_uverbs_idr_lock);
 126         ret = idr_get_new(idr, uobj, &uobj->id);
 127         spin_unlock(&ib_uverbs_idr_lock);
 128
 129         if (ret == -EAGAIN)
 130                 goto retry;
 131
 132         return ret;
 133 }
 134
 135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 136 {
 137         spin_lock(&ib_uverbs_idr_lock);
 138         idr_remove(idr, uobj->id);
 139         spin_unlock(&ib_uverbs_idr_lock);
 140 }
 141
 142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 143                                          struct ib_ucontext *context)
 144 {
 145         struct ib_uobject *uobj;
 146
 147         spin_lock(&ib_uverbs_idr_lock);
 148         uobj = idr_find(idr, id);
 149         if (uobj) {
 150                 if (uobj->context == context)
 151                         kref_get(&uobj->ref);
 152                 else
 153                         uobj = NULL;
 154         }
 155         spin_unlock(&ib_uverbs_idr_lock);
 156
 157         return uobj;
 158 }
 159
 160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 161                                         struct ib_ucontext *context, int nested)
 162 {
 163         struct ib_uobject *uobj;
 164
 165         uobj = __idr_get_uobj(idr, id, context);
 166         if (!uobj)
 167                 return NULL;
 168
 169         if (nested)
 170                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 171         else
 172                 down_read(&uobj->mutex);
 173         if (!uobj->live) {
 174                 put_uobj_read(uobj);
 175                 return NULL;
 176         }
 177
 178         return uobj;
 179 }
 180
 181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 182                                          struct ib_ucontext *context)
 183 {
 184         struct ib_uobject *uobj;
 185
 186         uobj = __idr_get_uobj(idr, id, context);
 187         if (!uobj)
 188                 return NULL;
 189
 190         down_write(&uobj->mutex);
 191         if (!uobj->live) {
 192                 put_uobj_write(uobj);
 193                 return NULL;
 194         }
 195
 196         return uobj;
 197 }
 198
 199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 200                           int nested)
 201 {
 202         struct ib_uobject *uobj;
 203
 204         uobj = idr_read_uobj(idr, id, context, nested);
 205         return uobj ? uobj->object : NULL;
 206 }
 207
 208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 209 {
 210         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 211 }
 212
 213 static void put_pd_read(struct ib_pd *pd)
 214 {
 215         put_uobj_read(pd->uobject);
 216 }
 217
 218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 219 {
 220         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 221 }
 222
 223 static void put_cq_read(struct ib_cq *cq)
 224 {
 225         put_uobj_read(cq->uobject);
 226 }
 227
 228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 229 {
 230         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 231 }
 232
 233 static void put_ah_read(struct ib_ah *ah)
 234 {
 235         put_uobj_read(ah->uobject);
 236 }
 237
 238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 239 {
 240         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 241 }
 242
 243 static void put_qp_read(struct ib_qp *qp)
 244 {
 245         put_uobj_read(qp->uobject);
 246 }
 247
 248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 249 {
 250         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 251 }
 252
 253 static void put_srq_read(struct ib_srq *srq)
 254 {
 255         put_uobj_read(srq->uobject);
 256 }
 257
 258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 259                               const char __user *buf,
 260                               int in_len, int out_len)
 261 {
 262         struct ib_uverbs_get_context      cmd;
 263         struct ib_uverbs_get_context_resp resp;
 264         struct ib_udata                   udata;
 265         struct ib_device                 *ibdev = file->device->ib_dev;
 266         struct ib_ucontext               *ucontext;
 267         struct file                      *filp;
 268         int ret;
 269
 270         if (out_len < sizeof resp)
 271                 return -ENOSPC;
 272
 273         if (copy_from_user(&cmd, buf, sizeof cmd))
 274                 return -EFAULT;
 275
 276         mutex_lock(&file->mutex);
 277
 278         if (file->ucontext) {
 279                 ret = -EINVAL;
 280                 goto err;
 281         }
 282
 283         INIT_UDATA(&udata, buf + sizeof cmd,
 284                    (unsigned long) cmd.response + sizeof resp,
 285                    in_len - sizeof cmd, out_len - sizeof resp);
 286
 287         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 288         if (IS_ERR(ucontext)) {
 289                 ret = PTR_ERR(ucontext);
 290                 goto err;
 291         }
 292
 293         ucontext->device = ibdev;
 294         INIT_LIST_HEAD(&ucontext->pd_list);
 295         INIT_LIST_HEAD(&ucontext->mr_list);
 296         INIT_LIST_HEAD(&ucontext->mw_list);
 297         INIT_LIST_HEAD(&ucontext->cq_list);
 298         INIT_LIST_HEAD(&ucontext->qp_list);
 299         INIT_LIST_HEAD(&ucontext->srq_list);
 300         INIT_LIST_HEAD(&ucontext->ah_list);
 301         ucontext->closing = 0;
 302
 303         resp.num_comp_vectors = file->device->num_comp_vectors;
 304
 305         ret = get_unused_fd();
 306         if (ret < 0)
 307                 goto err_free;
 308         resp.async_fd = ret;
 309
 310         filp = ib_uverbs_alloc_event_file(file, 1);
 311         if (IS_ERR(filp)) {
 312                 ret = PTR_ERR(filp);
 313                 goto err_fd;
 314         }
 315
 316         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 317                          &resp, sizeof resp)) {
 318                 ret = -EFAULT;
 319                 goto err_file;
 320         }
 321
 322         file->async_file = filp->private_data;
 323
 324         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 325                               ib_uverbs_event_handler);
 326         ret = ib_register_event_handler(&file->event_handler);
 327         if (ret)
 328                 goto err_file;
 329
 330         kref_get(&file->async_file->ref);
 331         kref_get(&file->ref);
 332         file->ucontext = ucontext;
 333
 334         fd_install(resp.async_fd, filp);
 335
 336         mutex_unlock(&file->mutex);
 337
 338         return in_len;
 339
 340 err_file:
 341         fput(filp);
 342
 343 err_fd:
 344         put_unused_fd(resp.async_fd);
 345
 346 err_free:
 347         ibdev->dealloc_ucontext(ucontext);
 348
 349 err:
 350         mutex_unlock(&file->mutex);
 351         return ret;
 352 }
 353
 354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 355                                const char __user *buf,
 356                                int in_len, int out_len)
 357 {
 358         struct ib_uverbs_query_device      cmd;
 359         struct ib_uverbs_query_device_resp resp;
 360         struct ib_device_attr              attr;
 361         int                                ret;
 362
 363         if (out_len < sizeof resp)
 364                 return -ENOSPC;
 365
 366         if (copy_from_user(&cmd, buf, sizeof cmd))
 367                 return -EFAULT;
 368
 369         ret = ib_query_device(file->device->ib_dev, &attr);
 370         if (ret)
 371                 return ret;
 372
 373         memset(&resp, 0, sizeof resp);
 374
 375         resp.fw_ver                    = attr.fw_ver;
 376         resp.node_guid                 = file->device->ib_dev->node_guid;
 377         resp.sys_image_guid            = attr.sys_image_guid;
 378         resp.max_mr_size               = attr.max_mr_size;
 379         resp.page_size_cap             = attr.page_size_cap;
 380         resp.vendor_id                 = attr.vendor_id;
 381         resp.vendor_part_id            = attr.vendor_part_id;
 382         resp.hw_ver                    = attr.hw_ver;
 383         resp.max_qp                    = attr.max_qp;
 384         resp.max_qp_wr                 = attr.max_qp_wr;
 385         resp.device_cap_flags          = attr.device_cap_flags;
 386         resp.max_sge                   = attr.max_sge;
 387         resp.max_sge_rd                = attr.max_sge_rd;
 388         resp.max_cq                    = attr.max_cq;
 389         resp.max_cqe                   = attr.max_cqe;
 390         resp.max_mr                    = attr.max_mr;
 391         resp.max_pd                    = attr.max_pd;
 392         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 393         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 394         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 395         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 396         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 397         resp.atomic_cap                = attr.atomic_cap;
 398         resp.max_ee                    = attr.max_ee;
 399         resp.max_rdd                   = attr.max_rdd;
 400         resp.max_mw                    = attr.max_mw;
 401         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 402         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 403         resp.max_mcast_grp             = attr.max_mcast_grp;
 404         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 405         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 406         resp.max_ah                    = attr.max_ah;
 407         resp.max_fmr                   = attr.max_fmr;
 408         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 409         resp.max_srq                   = attr.max_srq;
 410         resp.max_srq_wr                = attr.max_srq_wr;
 411         resp.max_srq_sge               = attr.max_srq_sge;
 412         resp.max_pkeys                 = attr.max_pkeys;
 413         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 414         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 415
 416         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 417                          &resp, sizeof resp))
 418                 return -EFAULT;
 419
 420         return in_len;
 421 }
 422
 423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 424                              const char __user *buf,
 425                              int in_len, int out_len)
 426 {
 427         struct ib_uverbs_query_port      cmd;
 428         struct ib_uverbs_query_port_resp resp;
 429         struct ib_port_attr              attr;
 430         int                              ret;
 431
 432         if (out_len < sizeof resp)
 433                 return -ENOSPC;
 434
 435         if (copy_from_user(&cmd, buf, sizeof cmd))
 436                 return -EFAULT;
 437
 438         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 439         if (ret)
 440                 return ret;
 441
 442         memset(&resp, 0, sizeof resp);
 443
 444         resp.state           = attr.state;
 445         resp.max_mtu         = attr.max_mtu;
 446         resp.active_mtu      = attr.active_mtu;
 447         resp.gid_tbl_len     = attr.gid_tbl_len;
 448         resp.port_cap_flags  = attr.port_cap_flags;
 449         resp.max_msg_sz      = attr.max_msg_sz;
 450         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 451         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 452         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 453         resp.lid             = attr.lid;
 454         resp.sm_lid          = attr.sm_lid;
 455         resp.lmc             = attr.lmc;
 456         resp.max_vl_num      = attr.max_vl_num;
 457         resp.sm_sl           = attr.sm_sl;
 458         resp.subnet_timeout  = attr.subnet_timeout;
 459         resp.init_type_reply = attr.init_type_reply;
 460         resp.active_width    = attr.active_width;
 461         resp.active_speed    = attr.active_speed;
 462         resp.phys_state      = attr.phys_state;
 463         resp.link_layer      = rdma_port_get_link_layer(file->device->ib_dev,
 464                                                         cmd.port_num);
 465
 466         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 467                          &resp, sizeof resp))
 468                 return -EFAULT;
 469
 470         return in_len;
 471 }
 472
 473 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 474                            const char __user *buf,
 475                            int in_len, int out_len)
 476 {
 477         struct ib_uverbs_alloc_pd      cmd;
 478         struct ib_uverbs_alloc_pd_resp resp;
 479         struct ib_udata                udata;
 480         struct ib_uobject             *uobj;
 481         struct ib_pd                  *pd;
 482         int                            ret;
 483
 484         if (out_len < sizeof resp)
 485                 return -ENOSPC;
 486
 487         if (copy_from_user(&cmd, buf, sizeof cmd))
 488                 return -EFAULT;
 489
 490         INIT_UDATA(&udata, buf + sizeof cmd,
 491                    (unsigned long) cmd.response + sizeof resp,
 492                    in_len - sizeof cmd, out_len - sizeof resp);
 493
 494         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 495         if (!uobj)
 496                 return -ENOMEM;
 497
 498         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 499         down_write(&uobj->mutex);
 500
 501         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 502                                             file->ucontext, &udata);
 503         if (IS_ERR(pd)) {
 504                 ret = PTR_ERR(pd);
 505                 goto err;
 506         }
 507
 508         pd->device  = file->device->ib_dev;
 509         pd->uobject = uobj;
 510         atomic_set(&pd->usecnt, 0);
 511
 512         uobj->object = pd;
 513         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 514         if (ret)
 515                 goto err_idr;
 516
 517         memset(&resp, 0, sizeof resp);
 518         resp.pd_handle = uobj->id;
 519
 520         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 521                          &resp, sizeof resp)) {
 522                 ret = -EFAULT;
 523                 goto err_copy;
 524         }
 525
 526         mutex_lock(&file->mutex);
 527         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 528         mutex_unlock(&file->mutex);
 529
 530         uobj->live = 1;
 531
 532         up_write(&uobj->mutex);
 533
 534         return in_len;
 535
 536 err_copy:
 537         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 538
 539 err_idr:
 540         ib_dealloc_pd(pd);
 541
 542 err:
 543         put_uobj_write(uobj);
 544         return ret;
 545 }
 546
 547 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 548                              const char __user *buf,
 549                              int in_len, int out_len)
 550 {
 551         struct ib_uverbs_dealloc_pd cmd;
 552         struct ib_uobject          *uobj;
 553         int                         ret;
 554
 555         if (copy_from_user(&cmd, buf, sizeof cmd))
 556                 return -EFAULT;
 557
 558         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 559         if (!uobj)
 560                 return -EINVAL;
 561
 562         ret = ib_dealloc_pd(uobj->object);
 563         if (!ret)
 564                 uobj->live = 0;
 565
 566         put_uobj_write(uobj);
 567
 568         if (ret)
 569                 return ret;
 570
 571         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 572
 573         mutex_lock(&file->mutex);
 574         list_del(&uobj->list);
 575         mutex_unlock(&file->mutex);
 576
 577         put_uobj(uobj);
 578
 579         return in_len;
 580 }
 581
 582 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 583                          const char __user *buf, int in_len,
 584                          int out_len)
 585 {
 586         struct ib_uverbs_reg_mr      cmd;
 587         struct ib_uverbs_reg_mr_resp resp;
 588         struct ib_udata              udata;
 589         struct ib_uobject           *uobj;
 590         struct ib_pd                *pd;
 591         struct ib_mr                *mr;
 592         int                          ret;
 593
 594         if (out_len < sizeof resp)
 595                 return -ENOSPC;
 596
 597         if (copy_from_user(&cmd, buf, sizeof cmd))
 598                 return -EFAULT;
 599
 600         INIT_UDATA(&udata, buf + sizeof cmd,
 601                    (unsigned long) cmd.response + sizeof resp,
 602                    in_len - sizeof cmd, out_len - sizeof resp);
 603
 604         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 605                 return -EINVAL;
 606
 607         /*
 608          * Local write permission is required if remote write or
 609          * remote atomic permission is also requested.
 610          */
 611         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 612             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 613                 return -EINVAL;
 614
 615         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 616         if (!uobj)
 617                 return -ENOMEM;
 618
 619         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 620         down_write(&uobj->mutex);
 621
 622         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 623         if (!pd) {
 624                 ret = -EINVAL;
 625                 goto err_free;
 626         }
 627
 628         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 629                                      cmd.access_flags, &udata);
 630         if (IS_ERR(mr)) {
 631                 ret = PTR_ERR(mr);
 632                 goto err_put;
 633         }
 634
 635         mr->device  = pd->device;
 636         mr->pd      = pd;
 637         mr->uobject = uobj;
 638         atomic_inc(&pd->usecnt);
 639         atomic_set(&mr->usecnt, 0);
 640
 641         uobj->object = mr;
 642         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 643         if (ret)
 644                 goto err_unreg;
 645
 646         memset(&resp, 0, sizeof resp);
 647         resp.lkey      = mr->lkey;
 648         resp.rkey      = mr->rkey;
 649         resp.mr_handle = uobj->id;
 650
 651         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 652                          &resp, sizeof resp)) {
 653                 ret = -EFAULT;
 654                 goto err_copy;
 655         }
 656
 657         put_pd_read(pd);
 658
 659         mutex_lock(&file->mutex);
 660         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 661         mutex_unlock(&file->mutex);
 662
 663         uobj->live = 1;
 664
 665         up_write(&uobj->mutex);
 666
 667         return in_len;
 668
 669 err_copy:
 670         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 671
 672 err_unreg:
 673         ib_dereg_mr(mr);
 674
 675 err_put:
 676         put_pd_read(pd);
 677
 678 err_free:
 679         put_uobj_write(uobj);
 680         return ret;
 681 }
 682
 683 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 684                            const char __user *buf, int in_len,
 685                            int out_len)
 686 {
 687         struct ib_uverbs_dereg_mr cmd;
 688         struct ib_mr             *mr;
 689         struct ib_uobject        *uobj;
 690         int                       ret = -EINVAL;
 691
 692         if (copy_from_user(&cmd, buf, sizeof cmd))
 693                 return -EFAULT;
 694
 695         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 696         if (!uobj)
 697                 return -EINVAL;
 698
 699         mr = uobj->object;
 700
 701         ret = ib_dereg_mr(mr);
 702         if (!ret)
 703                 uobj->live = 0;
 704
 705         put_uobj_write(uobj);
 706
 707         if (ret)
 708                 return ret;
 709
 710         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 711
 712         mutex_lock(&file->mutex);
 713         list_del(&uobj->list);
 714         mutex_unlock(&file->mutex);
 715
 716         put_uobj(uobj);
 717
 718         return in_len;
 719 }
 720
 721 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 722                                       const char __user *buf, int in_len,
 723                                       int out_len)
 724 {
 725         struct ib_uverbs_create_comp_channel       cmd;
 726         struct ib_uverbs_create_comp_channel_resp  resp;
 727         struct file                               *filp;
 728         int ret;
 729
 730         if (out_len < sizeof resp)
 731                 return -ENOSPC;
 732
 733         if (copy_from_user(&cmd, buf, sizeof cmd))
 734                 return -EFAULT;
 735
 736         ret = get_unused_fd();
 737         if (ret < 0)
 738                 return ret;
 739         resp.fd = ret;
 740
 741         filp = ib_uverbs_alloc_event_file(file, 0);
 742         if (IS_ERR(filp)) {
 743                 put_unused_fd(resp.fd);
 744                 return PTR_ERR(filp);
 745         }
 746
 747         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 748                          &resp, sizeof resp)) {
 749                 put_unused_fd(resp.fd);
 750                 fput(filp);
 751                 return -EFAULT;
 752         }
 753
 754         fd_install(resp.fd, filp);
 755         return in_len;
 756 }
 757
 758 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 759                             const char __user *buf, int in_len,
 760                             int out_len)
 761 {
 762         struct ib_uverbs_create_cq      cmd;
 763         struct ib_uverbs_create_cq_resp resp;
 764         struct ib_udata                 udata;
 765         struct ib_ucq_object           *obj;
 766         struct ib_uverbs_event_file    *ev_file = NULL;
 767         struct ib_cq                   *cq;
 768         int                             ret;
 769
 770         if (out_len < sizeof resp)
 771                 return -ENOSPC;
 772
 773         if (copy_from_user(&cmd, buf, sizeof cmd))
 774                 return -EFAULT;
 775
 776         INIT_UDATA(&udata, buf + sizeof cmd,
 777                    (unsigned long) cmd.response + sizeof resp,
 778                    in_len - sizeof cmd, out_len - sizeof resp);
 779
 780         if (cmd.comp_vector >= file->device->num_comp_vectors)
 781                 return -EINVAL;
 782
 783         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 784         if (!obj)
 785                 return -ENOMEM;
 786
 787         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 788         down_write(&obj->uobject.mutex);
 789
 790         if (cmd.comp_channel >= 0) {
 791                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 792                 if (!ev_file) {
 793                         ret = -EINVAL;
 794                         goto err;
 795                 }
 796         }
 797
 798         obj->uverbs_file           = file;
 799         obj->comp_events_reported  = 0;
 800         obj->async_events_reported = 0;
 801         INIT_LIST_HEAD(&obj->comp_list);
 802         INIT_LIST_HEAD(&obj->async_list);
 803
 804         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 805                                              cmd.comp_vector,
 806                                              file->ucontext, &udata);
 807         if (IS_ERR(cq)) {
 808                 ret = PTR_ERR(cq);
 809                 goto err_file;
 810         }
 811
 812         cq->device        = file->device->ib_dev;
 813         cq->uobject       = &obj->uobject;
 814         cq->comp_handler  = ib_uverbs_comp_handler;
 815         cq->event_handler = ib_uverbs_cq_event_handler;
 816         cq->cq_context    = ev_file;
 817         atomic_set(&cq->usecnt, 0);
 818
 819         obj->uobject.object = cq;
 820         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 821         if (ret)
 822                 goto err_free;
 823
 824         memset(&resp, 0, sizeof resp);
 825         resp.cq_handle = obj->uobject.id;
 826         resp.cqe       = cq->cqe;
 827
 828         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 829                          &resp, sizeof resp)) {
 830                 ret = -EFAULT;
 831                 goto err_copy;
 832         }
 833
 834         mutex_lock(&file->mutex);
 835         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 836         mutex_unlock(&file->mutex);
 837
 838         obj->uobject.live = 1;
 839
 840         up_write(&obj->uobject.mutex);
 841
 842         return in_len;
 843
 844 err_copy:
 845         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 846
 847 err_free:
 848         ib_destroy_cq(cq);
 849
 850 err_file:
 851         if (ev_file)
 852                 ib_uverbs_release_ucq(file, ev_file, obj);
 853
 854 err:
 855         put_uobj_write(&obj->uobject);
 856         return ret;
 857 }
 858
 859 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 860                             const char __user *buf, int in_len,
 861                             int out_len)
 862 {
 863         struct ib_uverbs_resize_cq      cmd;
 864         struct ib_uverbs_resize_cq_resp resp;
 865         struct ib_udata                 udata;
 866         struct ib_cq                    *cq;
 867         int                             ret = -EINVAL;
 868
 869         if (copy_from_user(&cmd, buf, sizeof cmd))
 870                 return -EFAULT;
 871
 872         INIT_UDATA(&udata, buf + sizeof cmd,
 873                    (unsigned long) cmd.response + sizeof resp,
 874                    in_len - sizeof cmd, out_len - sizeof resp);
 875
 876         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 877         if (!cq)
 878                 return -EINVAL;
 879
 880         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 881         if (ret)
 882                 goto out;
 883
 884         resp.cqe = cq->cqe;
 885
 886         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 887                          &resp, sizeof resp.cqe))
 888                 ret = -EFAULT;
 889
 890 out:
 891         put_cq_read(cq);
 892
 893         return ret ? ret : in_len;
 894 }
 895
 896 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
 897 {
 898         struct ib_uverbs_wc tmp;
 899
 900         tmp.wr_id               = wc->wr_id;
 901         tmp.status              = wc->status;
 902         tmp.opcode              = wc->opcode;
 903         tmp.vendor_err          = wc->vendor_err;
 904         tmp.byte_len            = wc->byte_len;
 905         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
 906         tmp.qp_num              = wc->qp->qp_num;
 907         tmp.src_qp              = wc->src_qp;
 908         tmp.wc_flags            = wc->wc_flags;
 909         tmp.pkey_index          = wc->pkey_index;
 910         tmp.slid                = wc->slid;
 911         tmp.sl                  = wc->sl;
 912         tmp.dlid_path_bits      = wc->dlid_path_bits;
 913         tmp.port_num            = wc->port_num;
 914         tmp.reserved            = 0;
 915
 916         if (copy_to_user(dest, &tmp, sizeof tmp))
 917                 return -EFAULT;
 918
 919         return 0;
 920 }
 921
 922 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 923                           const char __user *buf, int in_len,
 924                           int out_len)
 925 {
 926         struct ib_uverbs_poll_cq       cmd;
 927         struct ib_uverbs_poll_cq_resp  resp;
 928         u8 __user                     *header_ptr;
 929         u8 __user                     *data_ptr;
 930         struct ib_cq                  *cq;
 931         struct ib_wc                   wc;
 932         int                            ret;
 933
 934         if (copy_from_user(&cmd, buf, sizeof cmd))
 935                 return -EFAULT;
 936
 937         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 938         if (!cq)
 939                 return -EINVAL;
 940
 941         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
 942         header_ptr = (void __user *)(unsigned long) cmd.response;
 943         data_ptr = header_ptr + sizeof resp;
 944
 945         memset(&resp, 0, sizeof resp);
 946         while (resp.count < cmd.ne) {
 947                 ret = ib_poll_cq(cq, 1, &wc);
 948                 if (ret < 0)
 949                         goto out_put;
 950                 if (!ret)
 951                         break;
 952
 953                 ret = copy_wc_to_user(data_ptr, &wc);
 954                 if (ret)
 955                         goto out_put;
 956
 957                 data_ptr += sizeof(struct ib_uverbs_wc);
 958                 ++resp.count;
 959         }
 960
 961         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
 962                 ret = -EFAULT;
 963                 goto out_put;
 964         }
 965
 966         ret = in_len;
 967
 968 out_put:
 969         put_cq_read(cq);
 970         return ret;
 971 }
 972
 973 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 974                                 const char __user *buf, int in_len,
 975                                 int out_len)
 976 {
 977         struct ib_uverbs_req_notify_cq cmd;
 978         struct ib_cq                  *cq;
 979
 980         if (copy_from_user(&cmd, buf, sizeof cmd))
 981                 return -EFAULT;
 982
 983         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 984         if (!cq)
 985                 return -EINVAL;
 986
 987         ib_req_notify_cq(cq, cmd.solicited_only ?
 988                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 989
 990         put_cq_read(cq);
 991
 992         return in_len;
 993 }
 994
 995 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 996                              const char __user *buf, int in_len,
 997                              int out_len)
 998 {
 999         struct ib_uverbs_destroy_cq      cmd;
1000         struct ib_uverbs_destroy_cq_resp resp;
1001         struct ib_uobject               *uobj;
1002         struct ib_cq                    *cq;
1003         struct ib_ucq_object            *obj;
1004         struct ib_uverbs_event_file     *ev_file;
1005         int                              ret = -EINVAL;
1006
1007         if (copy_from_user(&cmd, buf, sizeof cmd))
1008                 return -EFAULT;
1009
1010         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1011         if (!uobj)
1012                 return -EINVAL;
1013         cq      = uobj->object;
1014         ev_file = cq->cq_context;
1015         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1016
1017         ret = ib_destroy_cq(cq);
1018         if (!ret)
1019                 uobj->live = 0;
1020
1021         put_uobj_write(uobj);
1022
1023         if (ret)
1024                 return ret;
1025
1026         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1027
1028         mutex_lock(&file->mutex);
1029         list_del(&uobj->list);
1030         mutex_unlock(&file->mutex);
1031
1032         ib_uverbs_release_ucq(file, ev_file, obj);
1033
1034         memset(&resp, 0, sizeof resp);
1035         resp.comp_events_reported  = obj->comp_events_reported;
1036         resp.async_events_reported = obj->async_events_reported;
1037
1038         put_uobj(uobj);
1039
1040         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1041                          &resp, sizeof resp))
1042                 return -EFAULT;
1043
1044         return in_len;
1045 }
1046
1047 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1048                             const char __user *buf, int in_len,
1049                             int out_len)
1050 {
1051         struct ib_uverbs_create_qp      cmd;
1052         struct ib_uverbs_create_qp_resp resp;
1053         struct ib_udata                 udata;
1054         struct ib_uqp_object           *obj;
1055         struct ib_pd                   *pd;
1056         struct ib_cq                   *scq, *rcq;
1057         struct ib_srq                  *srq;
1058         struct ib_qp                   *qp;
1059         struct ib_qp_init_attr          attr;
1060         int ret;
1061
1062         if (out_len < sizeof resp)
1063                 return -ENOSPC;
1064
1065         if (copy_from_user(&cmd, buf, sizeof cmd))
1066                 return -EFAULT;
1067
1068         INIT_UDATA(&udata, buf + sizeof cmd,
1069                    (unsigned long) cmd.response + sizeof resp,
1070                    in_len - sizeof cmd, out_len - sizeof resp);
1071
1072         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1073         if (!obj)
1074                 return -ENOMEM;
1075
1076         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1077         down_write(&obj->uevent.uobject.mutex);
1078
1079         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1080         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1081         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1082         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1083                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1084
1085         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1086                 ret = -EINVAL;
1087                 goto err_put;
1088         }
1089
1090         attr.event_handler = ib_uverbs_qp_event_handler;
1091         attr.qp_context    = file;
1092         attr.send_cq       = scq;
1093         attr.recv_cq       = rcq;
1094         attr.srq           = srq;
1095         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1096         attr.qp_type       = cmd.qp_type;
1097         attr.create_flags  = 0;
1098
1099         attr.cap.max_send_wr     = cmd.max_send_wr;
1100         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1101         attr.cap.max_send_sge    = cmd.max_send_sge;
1102         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1103         attr.cap.max_inline_data = cmd.max_inline_data;
1104
1105         obj->uevent.events_reported     = 0;
1106         INIT_LIST_HEAD(&obj->uevent.event_list);
1107         INIT_LIST_HEAD(&obj->mcast_list);
1108
1109         qp = pd->device->create_qp(pd, &attr, &udata);
1110         if (IS_ERR(qp)) {
1111                 ret = PTR_ERR(qp);
1112                 goto err_put;
1113         }
1114
1115         qp->device        = pd->device;
1116         qp->pd            = pd;
1117         qp->send_cq       = attr.send_cq;
1118         qp->recv_cq       = attr.recv_cq;
1119         qp->srq           = attr.srq;
1120         qp->uobject       = &obj->uevent.uobject;
1121         qp->event_handler = attr.event_handler;
1122         qp->qp_context    = attr.qp_context;
1123         qp->qp_type       = attr.qp_type;
1124         atomic_inc(&pd->usecnt);
1125         atomic_inc(&attr.send_cq->usecnt);
1126         atomic_inc(&attr.recv_cq->usecnt);
1127         if (attr.srq)
1128                 atomic_inc(&attr.srq->usecnt);
1129
1130         obj->uevent.uobject.object = qp;
1131         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1132         if (ret)
1133                 goto err_destroy;
1134
1135         memset(&resp, 0, sizeof resp);
1136         resp.qpn             = qp->qp_num;
1137         resp.qp_handle       = obj->uevent.uobject.id;
1138         resp.max_recv_sge    = attr.cap.max_recv_sge;
1139         resp.max_send_sge    = attr.cap.max_send_sge;
1140         resp.max_recv_wr     = attr.cap.max_recv_wr;
1141         resp.max_send_wr     = attr.cap.max_send_wr;
1142         resp.max_inline_data = attr.cap.max_inline_data;
1143
1144         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1145                          &resp, sizeof resp)) {
1146                 ret = -EFAULT;
1147                 goto err_copy;
1148         }
1149
1150         put_pd_read(pd);
1151         put_cq_read(scq);
1152         if (rcq != scq)
1153                 put_cq_read(rcq);
1154         if (srq)
1155                 put_srq_read(srq);
1156
1157         mutex_lock(&file->mutex);
1158         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1159         mutex_unlock(&file->mutex);
1160
1161         obj->uevent.uobject.live = 1;
1162
1163         up_write(&obj->uevent.uobject.mutex);
1164
1165         return in_len;
1166
1167 err_copy:
1168         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1169
1170 err_destroy:
1171         ib_destroy_qp(qp);
1172
1173 err_put:
1174         if (pd)
1175                 put_pd_read(pd);
1176         if (scq)
1177                 put_cq_read(scq);
1178         if (rcq && rcq != scq)
1179                 put_cq_read(rcq);
1180         if (srq)
1181                 put_srq_read(srq);
1182
1183         put_uobj_write(&obj->uevent.uobject);
1184         return ret;
1185 }
1186
1187 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1188                            const char __user *buf, int in_len,
1189                            int out_len)
1190 {
1191         struct ib_uverbs_query_qp      cmd;
1192         struct ib_uverbs_query_qp_resp resp;
1193         struct ib_qp                   *qp;
1194         struct ib_qp_attr              *attr;
1195         struct ib_qp_init_attr         *init_attr;
1196         int                            ret;
1197
1198         if (copy_from_user(&cmd, buf, sizeof cmd))
1199                 return -EFAULT;
1200
1201         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1202         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1203         if (!attr || !init_attr) {
1204                 ret = -ENOMEM;
1205                 goto out;
1206         }
1207
1208         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1209         if (!qp) {
1210                 ret = -EINVAL;
1211                 goto out;
1212         }
1213
1214         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1215
1216         put_qp_read(qp);
1217
1218         if (ret)
1219                 goto out;
1220
1221         memset(&resp, 0, sizeof resp);
1222
1223         resp.qp_state               = attr->qp_state;
1224         resp.cur_qp_state           = attr->cur_qp_state;
1225         resp.path_mtu               = attr->path_mtu;
1226         resp.path_mig_state         = attr->path_mig_state;
1227         resp.qkey                   = attr->qkey;
1228         resp.rq_psn                 = attr->rq_psn;
1229         resp.sq_psn                 = attr->sq_psn;
1230         resp.dest_qp_num            = attr->dest_qp_num;
1231         resp.qp_access_flags        = attr->qp_access_flags;
1232         resp.pkey_index             = attr->pkey_index;
1233         resp.alt_pkey_index         = attr->alt_pkey_index;
1234         resp.sq_draining            = attr->sq_draining;
1235         resp.max_rd_atomic          = attr->max_rd_atomic;
1236         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1237         resp.min_rnr_timer          = attr->min_rnr_timer;
1238         resp.port_num               = attr->port_num;
1239         resp.timeout                = attr->timeout;
1240         resp.retry_cnt              = attr->retry_cnt;
1241         resp.rnr_retry              = attr->rnr_retry;
1242         resp.alt_port_num           = attr->alt_port_num;
1243         resp.alt_timeout            = attr->alt_timeout;
1244
1245         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1246         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1247         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1248         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1249         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1250         resp.dest.dlid              = attr->ah_attr.dlid;
1251         resp.dest.sl                = attr->ah_attr.sl;
1252         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1253         resp.dest.static_rate       = attr->ah_attr.static_rate;
1254         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1255         resp.dest.port_num          = attr->ah_attr.port_num;
1256
1257         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1258         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1259         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1260         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1261         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1262         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1263         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1264         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1265         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1266         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1267         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1268
1269         resp.max_send_wr            = init_attr->cap.max_send_wr;
1270         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1271         resp.max_send_sge           = init_attr->cap.max_send_sge;
1272         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1273         resp.max_inline_data        = init_attr->cap.max_inline_data;
1274         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1275
1276         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1277                          &resp, sizeof resp))
1278                 ret = -EFAULT;
1279
1280 out:
1281         kfree(attr);
1282         kfree(init_attr);
1283
1284         return ret ? ret : in_len;
1285 }
1286
1287 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1288                             const char __user *buf, int in_len,
1289                             int out_len)
1290 {
1291         struct ib_uverbs_modify_qp cmd;
1292         struct ib_udata            udata;
1293         struct ib_qp              *qp;
1294         struct ib_qp_attr         *attr;
1295         int                        ret;
1296
1297         if (copy_from_user(&cmd, buf, sizeof cmd))
1298                 return -EFAULT;
1299
1300         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1301                    out_len);
1302
1303         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1304         if (!attr)
1305                 return -ENOMEM;
1306
1307         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1308         if (!qp) {
1309                 ret = -EINVAL;
1310                 goto out;
1311         }
1312
1313         attr->qp_state            = cmd.qp_state;
1314         attr->cur_qp_state        = cmd.cur_qp_state;
1315         attr->path_mtu            = cmd.path_mtu;
1316         attr->path_mig_state      = cmd.path_mig_state;
1317         attr->qkey                = cmd.qkey;
1318         attr->rq_psn              = cmd.rq_psn;
1319         attr->sq_psn              = cmd.sq_psn;
1320         attr->dest_qp_num         = cmd.dest_qp_num;
1321         attr->qp_access_flags     = cmd.qp_access_flags;
1322         attr->pkey_index          = cmd.pkey_index;
1323         attr->alt_pkey_index      = cmd.alt_pkey_index;
1324         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1325         attr->max_rd_atomic       = cmd.max_rd_atomic;
1326         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1327         attr->min_rnr_timer       = cmd.min_rnr_timer;
1328         attr->port_num            = cmd.port_num;
1329         attr->timeout             = cmd.timeout;
1330         attr->retry_cnt           = cmd.retry_cnt;
1331         attr->rnr_retry           = cmd.rnr_retry;
1332         attr->alt_port_num        = cmd.alt_port_num;
1333         attr->alt_timeout         = cmd.alt_timeout;
1334
1335         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1336         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1337         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1338         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1339         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1340         attr->ah_attr.dlid                  = cmd.dest.dlid;
1341         attr->ah_attr.sl                    = cmd.dest.sl;
1342         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1343         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1344         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1345         attr->ah_attr.port_num              = cmd.dest.port_num;
1346
1347         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1348         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1349         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1350         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1351         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1352         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1353         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1354         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1355         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1356         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1357         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1358
1359         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1360
1361         put_qp_read(qp);
1362
1363         if (ret)
1364                 goto out;
1365
1366         ret = in_len;
1367
1368 out:
1369         kfree(attr);
1370
1371         return ret;
1372 }
1373
1374 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1375                              const char __user *buf, int in_len,
1376                              int out_len)
1377 {
1378         struct ib_uverbs_destroy_qp      cmd;
1379         struct ib_uverbs_destroy_qp_resp resp;
1380         struct ib_uobject               *uobj;
1381         struct ib_qp                    *qp;
1382         struct ib_uqp_object            *obj;
1383         int                              ret = -EINVAL;
1384
1385         if (copy_from_user(&cmd, buf, sizeof cmd))
1386                 return -EFAULT;
1387
1388         memset(&resp, 0, sizeof resp);
1389
1390         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1391         if (!uobj)
1392                 return -EINVAL;
1393         qp  = uobj->object;
1394         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1395
1396         if (!list_empty(&obj->mcast_list)) {
1397                 put_uobj_write(uobj);
1398                 return -EBUSY;
1399         }
1400
1401         ret = ib_destroy_qp(qp);
1402         if (!ret)
1403                 uobj->live = 0;
1404
1405         put_uobj_write(uobj);
1406
1407         if (ret)
1408                 return ret;
1409
1410         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1411
1412         mutex_lock(&file->mutex);
1413         list_del(&uobj->list);
1414         mutex_unlock(&file->mutex);
1415
1416         ib_uverbs_release_uevent(file, &obj->uevent);
1417
1418         resp.events_reported = obj->uevent.events_reported;
1419
1420         put_uobj(uobj);
1421
1422         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1423                          &resp, sizeof resp))
1424                 return -EFAULT;
1425
1426         return in_len;
1427 }
1428
1429 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1430                             const char __user *buf, int in_len,
1431                             int out_len)
1432 {
1433         struct ib_uverbs_post_send      cmd;
1434         struct ib_uverbs_post_send_resp resp;
1435         struct ib_uverbs_send_wr       *user_wr;
1436         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1437         struct ib_qp                   *qp;
1438         int                             i, sg_ind;
1439         int                             is_ud;
1440         ssize_t                         ret = -EINVAL;
1441
1442         if (copy_from_user(&cmd, buf, sizeof cmd))
1443                 return -EFAULT;
1444
1445         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1446             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1447                 return -EINVAL;
1448
1449         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1450                 return -EINVAL;
1451
1452         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1453         if (!user_wr)
1454                 return -ENOMEM;
1455
1456         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1457         if (!qp)
1458                 goto out;
1459
1460         is_ud = qp->qp_type == IB_QPT_UD;
1461         sg_ind = 0;
1462         last = NULL;
1463         for (i = 0; i < cmd.wr_count; ++i) {
1464                 if (copy_from_user(user_wr,
1465                                    buf + sizeof cmd + i * cmd.wqe_size,
1466                                    cmd.wqe_size)) {
1467                         ret = -EFAULT;
1468                         goto out_put;
1469                 }
1470
1471                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1472                         ret = -EINVAL;
1473                         goto out_put;
1474                 }
1475
1476                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1477                                user_wr->num_sge * sizeof (struct ib_sge),
1478                                GFP_KERNEL);
1479                 if (!next) {
1480                         ret = -ENOMEM;
1481                         goto out_put;
1482                 }
1483
1484                 if (!last)
1485                         wr = next;
1486                 else
1487                         last->next = next;
1488                 last = next;
1489
1490                 next->next       = NULL;
1491                 next->wr_id      = user_wr->wr_id;
1492                 next->num_sge    = user_wr->num_sge;
1493                 next->opcode     = user_wr->opcode;
1494                 next->send_flags = user_wr->send_flags;
1495
1496                 if (is_ud) {
1497                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1498                                                      file->ucontext);
1499                         if (!next->wr.ud.ah) {
1500                                 ret = -EINVAL;
1501                                 goto out_put;
1502                         }
1503                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1504                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1505                 } else {
1506                         switch (next->opcode) {
1507                         case IB_WR_RDMA_WRITE_WITH_IMM:
1508                                 next->ex.imm_data =
1509                                         (__be32 __force) user_wr->ex.imm_data;
1510                         case IB_WR_RDMA_WRITE:
1511                         case IB_WR_RDMA_READ:
1512                                 next->wr.rdma.remote_addr =
1513                                         user_wr->wr.rdma.remote_addr;
1514                                 next->wr.rdma.rkey        =
1515                                         user_wr->wr.rdma.rkey;
1516                                 break;
1517                         case IB_WR_SEND_WITH_IMM:
1518                                 next->ex.imm_data =
1519                                         (__be32 __force) user_wr->ex.imm_data;
1520                                 break;
1521                         case IB_WR_SEND_WITH_INV:
1522                                 next->ex.invalidate_rkey =
1523                                         user_wr->ex.invalidate_rkey;
1524                                 break;
1525                         case IB_WR_ATOMIC_CMP_AND_SWP:
1526                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1527                                 next->wr.atomic.remote_addr =
1528                                         user_wr->wr.atomic.remote_addr;
1529                                 next->wr.atomic.compare_add =
1530                                         user_wr->wr.atomic.compare_add;
1531                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1532                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1533                                 break;
1534                         default:
1535                                 break;
1536                         }
1537                 }
1538
1539                 if (next->num_sge) {
1540                         next->sg_list = (void *) next +
1541                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1542                         if (copy_from_user(next->sg_list,
1543                                            buf + sizeof cmd +
1544                                            cmd.wr_count * cmd.wqe_size +
1545                                            sg_ind * sizeof (struct ib_sge),
1546                                            next->num_sge * sizeof (struct ib_sge))) {
1547                                 ret = -EFAULT;
1548                                 goto out_put;
1549                         }
1550                         sg_ind += next->num_sge;
1551                 } else
1552                         next->sg_list = NULL;
1553         }
1554
1555         resp.bad_wr = 0;
1556         ret = qp->device->post_send(qp, wr, &bad_wr);
1557         if (ret)
1558                 for (next = wr; next; next = next->next) {
1559                         ++resp.bad_wr;
1560                         if (next == bad_wr)
1561                                 break;
1562                 }
1563
1564         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1565                          &resp, sizeof resp))
1566                 ret = -EFAULT;
1567
1568 out_put:
1569         put_qp_read(qp);
1570
1571         while (wr) {
1572                 if (is_ud && wr->wr.ud.ah)
1573                         put_ah_read(wr->wr.ud.ah);
1574                 next = wr->next;
1575                 kfree(wr);
1576                 wr = next;
1577         }
1578
1579 out:
1580         kfree(user_wr);
1581
1582         return ret ? ret : in_len;
1583 }
1584
1585 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1586                                                     int in_len,
1587                                                     u32 wr_count,
1588                                                     u32 sge_count,
1589                                                     u32 wqe_size)
1590 {
1591         struct ib_uverbs_recv_wr *user_wr;
1592         struct ib_recv_wr        *wr = NULL, *last, *next;
1593         int                       sg_ind;
1594         int                       i;
1595         int                       ret;
1596
1597         if (in_len < wqe_size * wr_count +
1598             sge_count * sizeof (struct ib_uverbs_sge))
1599                 return ERR_PTR(-EINVAL);
1600
1601         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1602                 return ERR_PTR(-EINVAL);
1603
1604         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1605         if (!user_wr)
1606                 return ERR_PTR(-ENOMEM);
1607
1608         sg_ind = 0;
1609         last = NULL;
1610         for (i = 0; i < wr_count; ++i) {
1611                 if (copy_from_user(user_wr, buf + i * wqe_size,
1612                                    wqe_size)) {
1613                         ret = -EFAULT;
1614                         goto err;
1615                 }
1616
1617                 if (user_wr->num_sge + sg_ind > sge_count) {
1618                         ret = -EINVAL;
1619                         goto err;
1620                 }
1621
1622                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1623                                user_wr->num_sge * sizeof (struct ib_sge),
1624                                GFP_KERNEL);
1625                 if (!next) {
1626                         ret = -ENOMEM;
1627                         goto err;
1628                 }
1629
1630                 if (!last)
1631                         wr = next;
1632                 else
1633                         last->next = next;
1634                 last = next;
1635
1636                 next->next       = NULL;
1637                 next->wr_id      = user_wr->wr_id;
1638                 next->num_sge    = user_wr->num_sge;
1639
1640                 if (next->num_sge) {
1641                         next->sg_list = (void *) next +
1642                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1643                         if (copy_from_user(next->sg_list,
1644                                            buf + wr_count * wqe_size +
1645                                            sg_ind * sizeof (struct ib_sge),
1646                                            next->num_sge * sizeof (struct ib_sge))) {
1647                                 ret = -EFAULT;
1648                                 goto err;
1649                         }
1650                         sg_ind += next->num_sge;
1651                 } else
1652                         next->sg_list = NULL;
1653         }
1654
1655         kfree(user_wr);
1656         return wr;
1657
1658 err:
1659         kfree(user_wr);
1660
1661         while (wr) {
1662                 next = wr->next;
1663                 kfree(wr);
1664                 wr = next;
1665         }
1666
1667         return ERR_PTR(ret);
1668 }
1669
1670 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1671                             const char __user *buf, int in_len,
1672                             int out_len)
1673 {
1674         struct ib_uverbs_post_recv      cmd;
1675         struct ib_uverbs_post_recv_resp resp;
1676         struct ib_recv_wr              *wr, *next, *bad_wr;
1677         struct ib_qp                   *qp;
1678         ssize_t                         ret = -EINVAL;
1679
1680         if (copy_from_user(&cmd, buf, sizeof cmd))
1681                 return -EFAULT;
1682
1683         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1684                                        in_len - sizeof cmd, cmd.wr_count,
1685                                        cmd.sge_count, cmd.wqe_size);
1686         if (IS_ERR(wr))
1687                 return PTR_ERR(wr);
1688
1689         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1690         if (!qp)
1691                 goto out;
1692
1693         resp.bad_wr = 0;
1694         ret = qp->device->post_recv(qp, wr, &bad_wr);
1695
1696         put_qp_read(qp);
1697
1698         if (ret)
1699                 for (next = wr; next; next = next->next) {
1700                         ++resp.bad_wr;
1701                         if (next == bad_wr)
1702                                 break;
1703                 }
1704
1705         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1706                          &resp, sizeof resp))
1707                 ret = -EFAULT;
1708
1709 out:
1710         while (wr) {
1711                 next = wr->next;
1712                 kfree(wr);
1713                 wr = next;
1714         }
1715
1716         return ret ? ret : in_len;
1717 }
1718
1719 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1720                                 const char __user *buf, int in_len,
1721                                 int out_len)
1722 {
1723         struct ib_uverbs_post_srq_recv      cmd;
1724         struct ib_uverbs_post_srq_recv_resp resp;
1725         struct ib_recv_wr                  *wr, *next, *bad_wr;
1726         struct ib_srq                      *srq;
1727         ssize_t                             ret = -EINVAL;
1728
1729         if (copy_from_user(&cmd, buf, sizeof cmd))
1730                 return -EFAULT;
1731
1732         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1733                                        in_len - sizeof cmd, cmd.wr_count,
1734                                        cmd.sge_count, cmd.wqe_size);
1735         if (IS_ERR(wr))
1736                 return PTR_ERR(wr);
1737
1738         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1739         if (!srq)
1740                 goto out;
1741
1742         resp.bad_wr = 0;
1743         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1744
1745         put_srq_read(srq);
1746
1747         if (ret)
1748                 for (next = wr; next; next = next->next) {
1749                         ++resp.bad_wr;
1750                         if (next == bad_wr)
1751                                 break;
1752                 }
1753
1754         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1755                          &resp, sizeof resp))
1756                 ret = -EFAULT;
1757
1758 out:
1759         while (wr) {
1760                 next = wr->next;
1761                 kfree(wr);
1762                 wr = next;
1763         }
1764
1765         return ret ? ret : in_len;
1766 }
1767
1768 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1769                             const char __user *buf, int in_len,
1770                             int out_len)
1771 {
1772         struct ib_uverbs_create_ah       cmd;
1773         struct ib_uverbs_create_ah_resp  resp;
1774         struct ib_uobject               *uobj;
1775         struct ib_pd                    *pd;
1776         struct ib_ah                    *ah;
1777         struct ib_ah_attr               attr;
1778         int ret;
1779
1780         if (out_len < sizeof resp)
1781                 return -ENOSPC;
1782
1783         if (copy_from_user(&cmd, buf, sizeof cmd))
1784                 return -EFAULT;
1785
1786         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1787         if (!uobj)
1788                 return -ENOMEM;
1789
1790         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1791         down_write(&uobj->mutex);
1792
1793         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1794         if (!pd) {
1795                 ret = -EINVAL;
1796                 goto err;
1797         }
1798
1799         attr.dlid              = cmd.attr.dlid;
1800         attr.sl                = cmd.attr.sl;
1801         attr.src_path_bits     = cmd.attr.src_path_bits;
1802         attr.static_rate       = cmd.attr.static_rate;
1803         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1804         attr.port_num          = cmd.attr.port_num;
1805         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1806         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1807         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1808         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1809         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1810
1811         ah = ib_create_ah(pd, &attr);
1812         if (IS_ERR(ah)) {
1813                 ret = PTR_ERR(ah);
1814                 goto err_put;
1815         }
1816
1817         ah->uobject  = uobj;
1818         uobj->object = ah;
1819
1820         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1821         if (ret)
1822                 goto err_destroy;
1823
1824         resp.ah_handle = uobj->id;
1825
1826         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1827                          &resp, sizeof resp)) {
1828                 ret = -EFAULT;
1829                 goto err_copy;
1830         }
1831
1832         put_pd_read(pd);
1833
1834         mutex_lock(&file->mutex);
1835         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1836         mutex_unlock(&file->mutex);
1837
1838         uobj->live = 1;
1839
1840         up_write(&uobj->mutex);
1841
1842         return in_len;
1843
1844 err_copy:
1845         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1846
1847 err_destroy:
1848         ib_destroy_ah(ah);
1849
1850 err_put:
1851         put_pd_read(pd);
1852
1853 err:
1854         put_uobj_write(uobj);
1855         return ret;
1856 }
1857
1858 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1859                              const char __user *buf, int in_len, int out_len)
1860 {
1861         struct ib_uverbs_destroy_ah cmd;
1862         struct ib_ah               *ah;
1863         struct ib_uobject          *uobj;
1864         int                         ret;
1865
1866         if (copy_from_user(&cmd, buf, sizeof cmd))
1867                 return -EFAULT;
1868
1869         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1870         if (!uobj)
1871                 return -EINVAL;
1872         ah = uobj->object;
1873
1874         ret = ib_destroy_ah(ah);
1875         if (!ret)
1876                 uobj->live = 0;
1877
1878         put_uobj_write(uobj);
1879
1880         if (ret)
1881                 return ret;
1882
1883         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1884
1885         mutex_lock(&file->mutex);
1886         list_del(&uobj->list);
1887         mutex_unlock(&file->mutex);
1888
1889         put_uobj(uobj);
1890
1891         return in_len;
1892 }
1893
1894 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1895                                const char __user *buf, int in_len,
1896                                int out_len)
1897 {
1898         struct ib_uverbs_attach_mcast cmd;
1899         struct ib_qp                 *qp;
1900         struct ib_uqp_object         *obj;
1901         struct ib_uverbs_mcast_entry *mcast;
1902         int                           ret;
1903
1904         if (copy_from_user(&cmd, buf, sizeof cmd))
1905                 return -EFAULT;
1906
1907         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1908         if (!qp)
1909                 return -EINVAL;
1910
1911         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1912
1913         list_for_each_entry(mcast, &obj->mcast_list, list)
1914                 if (cmd.mlid == mcast->lid &&
1915                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1916                         ret = 0;
1917                         goto out_put;
1918                 }
1919
1920         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1921         if (!mcast) {
1922                 ret = -ENOMEM;
1923                 goto out_put;
1924         }
1925
1926         mcast->lid = cmd.mlid;
1927         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1928
1929         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1930         if (!ret)
1931                 list_add_tail(&mcast->list, &obj->mcast_list);
1932         else
1933                 kfree(mcast);
1934
1935 out_put:
1936         put_qp_read(qp);
1937
1938         return ret ? ret : in_len;
1939 }
1940
1941 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1942                                const char __user *buf, int in_len,
1943                                int out_len)
1944 {
1945         struct ib_uverbs_detach_mcast cmd;
1946         struct ib_uqp_object         *obj;
1947         struct ib_qp                 *qp;
1948         struct ib_uverbs_mcast_entry *mcast;
1949         int                           ret = -EINVAL;
1950
1951         if (copy_from_user(&cmd, buf, sizeof cmd))
1952                 return -EFAULT;
1953
1954         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1955         if (!qp)
1956                 return -EINVAL;
1957
1958         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1959         if (ret)
1960                 goto out_put;
1961
1962         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1963
1964         list_for_each_entry(mcast, &obj->mcast_list, list)
1965                 if (cmd.mlid == mcast->lid &&
1966                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1967                         list_del(&mcast->list);
1968                         kfree(mcast);
1969                         break;
1970                 }
1971
1972 out_put:
1973         put_qp_read(qp);
1974
1975         return ret ? ret : in_len;
1976 }
1977
1978 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1979                              const char __user *buf, int in_len,
1980                              int out_len)
1981 {
1982         struct ib_uverbs_create_srq      cmd;
1983         struct ib_uverbs_create_srq_resp resp;
1984         struct ib_udata                  udata;
1985         struct ib_uevent_object         *obj;
1986         struct ib_pd                    *pd;
1987         struct ib_srq                   *srq;
1988         struct ib_srq_init_attr          attr;
1989         int ret;
1990
1991         if (out_len < sizeof resp)
1992                 return -ENOSPC;
1993
1994         if (copy_from_user(&cmd, buf, sizeof cmd))
1995                 return -EFAULT;
1996
1997         INIT_UDATA(&udata, buf + sizeof cmd,
1998                    (unsigned long) cmd.response + sizeof resp,
1999                    in_len - sizeof cmd, out_len - sizeof resp);
2000
2001         obj = kmalloc(sizeof *obj, GFP_KERNEL);
2002         if (!obj)
2003                 return -ENOMEM;
2004
2005         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2006         down_write(&obj->uobject.mutex);
2007
2008         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
2009         if (!pd) {
2010                 ret = -EINVAL;
2011                 goto err;
2012         }
2013
2014         attr.event_handler  = ib_uverbs_srq_event_handler;
2015         attr.srq_context    = file;
2016         attr.attr.max_wr    = cmd.max_wr;
2017         attr.attr.max_sge   = cmd.max_sge;
2018         attr.attr.srq_limit = cmd.srq_limit;
2019
2020         obj->events_reported     = 0;
2021         INIT_LIST_HEAD(&obj->event_list);
2022
2023         srq = pd->device->create_srq(pd, &attr, &udata);
2024         if (IS_ERR(srq)) {
2025                 ret = PTR_ERR(srq);
2026                 goto err_put;
2027         }
2028
2029         srq->device        = pd->device;
2030         srq->pd            = pd;
2031         srq->uobject       = &obj->uobject;
2032         srq->event_handler = attr.event_handler;
2033         srq->srq_context   = attr.srq_context;
2034         atomic_inc(&pd->usecnt);
2035         atomic_set(&srq->usecnt, 0);
2036
2037         obj->uobject.object = srq;
2038         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2039         if (ret)
2040                 goto err_destroy;
2041
2042         memset(&resp, 0, sizeof resp);
2043         resp.srq_handle = obj->uobject.id;
2044         resp.max_wr     = attr.attr.max_wr;
2045         resp.max_sge    = attr.attr.max_sge;
2046
2047         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2048                          &resp, sizeof resp)) {
2049                 ret = -EFAULT;
2050                 goto err_copy;
2051         }
2052
2053         put_pd_read(pd);
2054
2055         mutex_lock(&file->mutex);
2056         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2057         mutex_unlock(&file->mutex);
2058
2059         obj->uobject.live = 1;
2060
2061         up_write(&obj->uobject.mutex);
2062
2063         return in_len;
2064
2065 err_copy:
2066         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2067
2068 err_destroy:
2069         ib_destroy_srq(srq);
2070
2071 err_put:
2072         put_pd_read(pd);
2073
2074 err:
2075         put_uobj_write(&obj->uobject);
2076         return ret;
2077 }
2078
2079 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2080                              const char __user *buf, int in_len,
2081                              int out_len)
2082 {
2083         struct ib_uverbs_modify_srq cmd;
2084         struct ib_udata             udata;
2085         struct ib_srq              *srq;
2086         struct ib_srq_attr          attr;
2087         int                         ret;
2088
2089         if (copy_from_user(&cmd, buf, sizeof cmd))
2090                 return -EFAULT;
2091
2092         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2093                    out_len);
2094
2095         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2096         if (!srq)
2097                 return -EINVAL;
2098
2099         attr.max_wr    = cmd.max_wr;
2100         attr.srq_limit = cmd.srq_limit;
2101
2102         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2103
2104         put_srq_read(srq);
2105
2106         return ret ? ret : in_len;
2107 }
2108
2109 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2110                             const char __user *buf,
2111                             int in_len, int out_len)
2112 {
2113         struct ib_uverbs_query_srq      cmd;
2114         struct ib_uverbs_query_srq_resp resp;
2115         struct ib_srq_attr              attr;
2116         struct ib_srq                   *srq;
2117         int                             ret;
2118
2119         if (out_len < sizeof resp)
2120                 return -ENOSPC;
2121
2122         if (copy_from_user(&cmd, buf, sizeof cmd))
2123                 return -EFAULT;
2124
2125         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2126         if (!srq)
2127                 return -EINVAL;
2128
2129         ret = ib_query_srq(srq, &attr);
2130
2131         put_srq_read(srq);
2132
2133         if (ret)
2134                 return ret;
2135
2136         memset(&resp, 0, sizeof resp);
2137
2138         resp.max_wr    = attr.max_wr;
2139         resp.max_sge   = attr.max_sge;
2140         resp.srq_limit = attr.srq_limit;
2141
2142         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2143                          &resp, sizeof resp))
2144                 return -EFAULT;
2145
2146         return in_len;
2147 }
2148
2149 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2150                               const char __user *buf, int in_len,
2151                               int out_len)
2152 {
2153         struct ib_uverbs_destroy_srq      cmd;
2154         struct ib_uverbs_destroy_srq_resp resp;
2155         struct ib_uobject                *uobj;
2156         struct ib_srq                    *srq;
2157         struct ib_uevent_object          *obj;
2158         int                               ret = -EINVAL;
2159
2160         if (copy_from_user(&cmd, buf, sizeof cmd))
2161                 return -EFAULT;
2162
2163         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2164         if (!uobj)
2165                 return -EINVAL;
2166         srq = uobj->object;
2167         obj = container_of(uobj, struct ib_uevent_object, uobject);
2168
2169         ret = ib_destroy_srq(srq);
2170         if (!ret)
2171                 uobj->live = 0;
2172
2173         put_uobj_write(uobj);
2174
2175         if (ret)
2176                 return ret;
2177
2178         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2179
2180         mutex_lock(&file->mutex);
2181         list_del(&uobj->list);
2182         mutex_unlock(&file->mutex);
2183
2184         ib_uverbs_release_uevent(file, obj);
2185
2186         memset(&resp, 0, sizeof resp);
2187         resp.events_reported = obj->events_reported;
2188
2189         put_uobj(uobj);
2190
2191         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2192                          &resp, sizeof resp))
2193                 ret = -EFAULT;
2194
2195         return ret ? ret : in_len;
2196 }