drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  *
  34  * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
  35  */
  36
  37 #include <linux/file.h>
  38 #include <linux/fs.h>
  39
  40 #include <asm/uaccess.h>
  41
  42 #include "uverbs.h"
  43
  44 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  45         do {                                                            \
  46                 (udata)->inbuf  = (void __user *) (ibuf);               \
  47                 (udata)->outbuf = (void __user *) (obuf);               \
  48                 (udata)->inlen  = (ilen);                               \
  49                 (udata)->outlen = (olen);                               \
  50         } while (0)
  51
  52 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
  53                               const char __user *buf,
  54                               int in_len, int out_len)
  55 {
  56         struct ib_uverbs_get_context      cmd;
  57         struct ib_uverbs_get_context_resp resp;
  58         struct ib_udata                   udata;
  59         struct ib_device                 *ibdev = file->device->ib_dev;
  60         struct ib_ucontext               *ucontext;
  61         struct file                      *filp;
  62         int ret;
  63
  64         if (out_len < sizeof resp)
  65                 return -ENOSPC;
  66
  67         if (copy_from_user(&cmd, buf, sizeof cmd))
  68                 return -EFAULT;
  69
  70         down(&file->mutex);
  71
  72         if (file->ucontext) {
  73                 ret = -EINVAL;
  74                 goto err;
  75         }
  76
  77         INIT_UDATA(&udata, buf + sizeof cmd,
  78                    (unsigned long) cmd.response + sizeof resp,
  79                    in_len - sizeof cmd, out_len - sizeof resp);
  80
  81         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
  82         if (IS_ERR(ucontext))
  83                 return PTR_ERR(file->ucontext);
  84
  85         ucontext->device = ibdev;
  86         INIT_LIST_HEAD(&ucontext->pd_list);
  87         INIT_LIST_HEAD(&ucontext->mr_list);
  88         INIT_LIST_HEAD(&ucontext->mw_list);
  89         INIT_LIST_HEAD(&ucontext->cq_list);
  90         INIT_LIST_HEAD(&ucontext->qp_list);
  91         INIT_LIST_HEAD(&ucontext->srq_list);
  92         INIT_LIST_HEAD(&ucontext->ah_list);
  93
  94         resp.num_comp_vectors = file->device->num_comp_vectors;
  95
  96         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
  97         if (IS_ERR(filp)) {
  98                 ret = PTR_ERR(filp);
  99                 goto err_free;
 100         }
 101
 102         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 103                          &resp, sizeof resp)) {
 104                 ret = -EFAULT;
 105                 goto err_file;
 106         }
 107
 108         file->async_file = filp->private_data;
 109
 110         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 111                               ib_uverbs_event_handler);
 112         ret = ib_register_event_handler(&file->event_handler);
 113         if (ret)
 114                 goto err_file;
 115
 116         kref_get(&file->async_file->ref);
 117         kref_get(&file->ref);
 118         file->ucontext = ucontext;
 119
 120         fd_install(resp.async_fd, filp);
 121
 122         up(&file->mutex);
 123
 124         return in_len;
 125
 126 err_file:
 127         put_unused_fd(resp.async_fd);
 128         fput(filp);
 129
 130 err_free:
 131         ibdev->dealloc_ucontext(ucontext);
 132
 133 err:
 134         up(&file->mutex);
 135         return ret;
 136 }
 137
 138 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 139                                const char __user *buf,
 140                                int in_len, int out_len)
 141 {
 142         struct ib_uverbs_query_device      cmd;
 143         struct ib_uverbs_query_device_resp resp;
 144         struct ib_device_attr              attr;
 145         int                                ret;
 146
 147         if (out_len < sizeof resp)
 148                 return -ENOSPC;
 149
 150         if (copy_from_user(&cmd, buf, sizeof cmd))
 151                 return -EFAULT;
 152
 153         ret = ib_query_device(file->device->ib_dev, &attr);
 154         if (ret)
 155                 return ret;
 156
 157         memset(&resp, 0, sizeof resp);
 158
 159         resp.fw_ver                    = attr.fw_ver;
 160         resp.node_guid                 = attr.node_guid;
 161         resp.sys_image_guid            = attr.sys_image_guid;
 162         resp.max_mr_size               = attr.max_mr_size;
 163         resp.page_size_cap             = attr.page_size_cap;
 164         resp.vendor_id                 = attr.vendor_id;
 165         resp.vendor_part_id            = attr.vendor_part_id;
 166         resp.hw_ver                    = attr.hw_ver;
 167         resp.max_qp                    = attr.max_qp;
 168         resp.max_qp_wr                 = attr.max_qp_wr;
 169         resp.device_cap_flags          = attr.device_cap_flags;
 170         resp.max_sge                   = attr.max_sge;
 171         resp.max_sge_rd                = attr.max_sge_rd;
 172         resp.max_cq                    = attr.max_cq;
 173         resp.max_cqe                   = attr.max_cqe;
 174         resp.max_mr                    = attr.max_mr;
 175         resp.max_pd                    = attr.max_pd;
 176         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 177         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 178         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 179         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 180         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 181         resp.atomic_cap                = attr.atomic_cap;
 182         resp.max_ee                    = attr.max_ee;
 183         resp.max_rdd                   = attr.max_rdd;
 184         resp.max_mw                    = attr.max_mw;
 185         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 186         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 187         resp.max_mcast_grp             = attr.max_mcast_grp;
 188         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 189         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 190         resp.max_ah                    = attr.max_ah;
 191         resp.max_fmr                   = attr.max_fmr;
 192         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 193         resp.max_srq                   = attr.max_srq;
 194         resp.max_srq_wr                = attr.max_srq_wr;
 195         resp.max_srq_sge               = attr.max_srq_sge;
 196         resp.max_pkeys                 = attr.max_pkeys;
 197         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 198         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 199
 200         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 201                          &resp, sizeof resp))
 202                 return -EFAULT;
 203
 204         return in_len;
 205 }
 206
 207 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 208                              const char __user *buf,
 209                              int in_len, int out_len)
 210 {
 211         struct ib_uverbs_query_port      cmd;
 212         struct ib_uverbs_query_port_resp resp;
 213         struct ib_port_attr              attr;
 214         int                              ret;
 215
 216         if (out_len < sizeof resp)
 217                 return -ENOSPC;
 218
 219         if (copy_from_user(&cmd, buf, sizeof cmd))
 220                 return -EFAULT;
 221
 222         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 223         if (ret)
 224                 return ret;
 225
 226         memset(&resp, 0, sizeof resp);
 227
 228         resp.state           = attr.state;
 229         resp.max_mtu         = attr.max_mtu;
 230         resp.active_mtu      = attr.active_mtu;
 231         resp.gid_tbl_len     = attr.gid_tbl_len;
 232         resp.port_cap_flags  = attr.port_cap_flags;
 233         resp.max_msg_sz      = attr.max_msg_sz;
 234         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 235         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 236         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 237         resp.lid             = attr.lid;
 238         resp.sm_lid          = attr.sm_lid;
 239         resp.lmc             = attr.lmc;
 240         resp.max_vl_num      = attr.max_vl_num;
 241         resp.sm_sl           = attr.sm_sl;
 242         resp.subnet_timeout  = attr.subnet_timeout;
 243         resp.init_type_reply = attr.init_type_reply;
 244         resp.active_width    = attr.active_width;
 245         resp.active_speed    = attr.active_speed;
 246         resp.phys_state      = attr.phys_state;
 247
 248         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 249                          &resp, sizeof resp))
 250                 return -EFAULT;
 251
 252         return in_len;
 253 }
 254
 255 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 256                            const char __user *buf,
 257                            int in_len, int out_len)
 258 {
 259         struct ib_uverbs_alloc_pd      cmd;
 260         struct ib_uverbs_alloc_pd_resp resp;
 261         struct ib_udata                udata;
 262         struct ib_uobject             *uobj;
 263         struct ib_pd                  *pd;
 264         int                            ret;
 265
 266         if (out_len < sizeof resp)
 267                 return -ENOSPC;
 268
 269         if (copy_from_user(&cmd, buf, sizeof cmd))
 270                 return -EFAULT;
 271
 272         INIT_UDATA(&udata, buf + sizeof cmd,
 273                    (unsigned long) cmd.response + sizeof resp,
 274                    in_len - sizeof cmd, out_len - sizeof resp);
 275
 276         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 277         if (!uobj)
 278                 return -ENOMEM;
 279
 280         uobj->context = file->ucontext;
 281
 282         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 283                                             file->ucontext, &udata);
 284         if (IS_ERR(pd)) {
 285                 ret = PTR_ERR(pd);
 286                 goto err;
 287         }
 288
 289         pd->device  = file->device->ib_dev;
 290         pd->uobject = uobj;
 291         atomic_set(&pd->usecnt, 0);
 292
 293         down(&ib_uverbs_idr_mutex);
 294
 295 retry:
 296         if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
 297                 ret = -ENOMEM;
 298                 goto err_up;
 299         }
 300
 301         ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
 302
 303         if (ret == -EAGAIN)
 304                 goto retry;
 305         if (ret)
 306                 goto err_up;
 307
 308         memset(&resp, 0, sizeof resp);
 309         resp.pd_handle = uobj->id;
 310
 311         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 312                          &resp, sizeof resp)) {
 313                 ret = -EFAULT;
 314                 goto err_idr;
 315         }
 316
 317         down(&file->mutex);
 318         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 319         up(&file->mutex);
 320
 321         up(&ib_uverbs_idr_mutex);
 322
 323         return in_len;
 324
 325 err_idr:
 326         idr_remove(&ib_uverbs_pd_idr, uobj->id);
 327
 328 err_up:
 329         up(&ib_uverbs_idr_mutex);
 330         ib_dealloc_pd(pd);
 331
 332 err:
 333         kfree(uobj);
 334         return ret;
 335 }
 336
 337 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 338                              const char __user *buf,
 339                              int in_len, int out_len)
 340 {
 341         struct ib_uverbs_dealloc_pd cmd;
 342         struct ib_pd               *pd;
 343         struct ib_uobject          *uobj;
 344         int                         ret = -EINVAL;
 345
 346         if (copy_from_user(&cmd, buf, sizeof cmd))
 347                 return -EFAULT;
 348
 349         down(&ib_uverbs_idr_mutex);
 350
 351         pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
 352         if (!pd || pd->uobject->context != file->ucontext)
 353                 goto out;
 354
 355         uobj = pd->uobject;
 356
 357         ret = ib_dealloc_pd(pd);
 358         if (ret)
 359                 goto out;
 360
 361         idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
 362
 363         down(&file->mutex);
 364         list_del(&uobj->list);
 365         up(&file->mutex);
 366
 367         kfree(uobj);
 368
 369 out:
 370         up(&ib_uverbs_idr_mutex);
 371
 372         return ret ? ret : in_len;
 373 }
 374
 375 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 376                          const char __user *buf, int in_len,
 377                          int out_len)
 378 {
 379         struct ib_uverbs_reg_mr      cmd;
 380         struct ib_uverbs_reg_mr_resp resp;
 381         struct ib_udata              udata;
 382         struct ib_umem_object       *obj;
 383         struct ib_pd                *pd;
 384         struct ib_mr                *mr;
 385         int                          ret;
 386
 387         if (out_len < sizeof resp)
 388                 return -ENOSPC;
 389
 390         if (copy_from_user(&cmd, buf, sizeof cmd))
 391                 return -EFAULT;
 392
 393         INIT_UDATA(&udata, buf + sizeof cmd,
 394                    (unsigned long) cmd.response + sizeof resp,
 395                    in_len - sizeof cmd, out_len - sizeof resp);
 396
 397         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 398                 return -EINVAL;
 399
 400         /*
 401          * Local write permission is required if remote write or
 402          * remote atomic permission is also requested.
 403          */
 404         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 405             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 406                 return -EINVAL;
 407
 408         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 409         if (!obj)
 410                 return -ENOMEM;
 411
 412         obj->uobject.context = file->ucontext;
 413
 414         /*
 415          * We ask for writable memory if any access flags other than
 416          * "remote read" are set.  "Local write" and "remote write"
 417          * obviously require write access.  "Remote atomic" can do
 418          * things like fetch and add, which will modify memory, and
 419          * "MW bind" can change permissions by binding a window.
 420          */
 421         ret = ib_umem_get(file->device->ib_dev, &obj->umem,
 422                           (void *) (unsigned long) cmd.start, cmd.length,
 423                           !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
 424         if (ret)
 425                 goto err_free;
 426
 427         obj->umem.virt_base = cmd.hca_va;
 428
 429         down(&ib_uverbs_idr_mutex);
 430
 431         pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
 432         if (!pd || pd->uobject->context != file->ucontext) {
 433                 ret = -EINVAL;
 434                 goto err_up;
 435         }
 436
 437         if (!pd->device->reg_user_mr) {
 438                 ret = -ENOSYS;
 439                 goto err_up;
 440         }
 441
 442         mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
 443         if (IS_ERR(mr)) {
 444                 ret = PTR_ERR(mr);
 445                 goto err_up;
 446         }
 447
 448         mr->device  = pd->device;
 449         mr->pd      = pd;
 450         mr->uobject = &obj->uobject;
 451         atomic_inc(&pd->usecnt);
 452         atomic_set(&mr->usecnt, 0);
 453
 454         memset(&resp, 0, sizeof resp);
 455         resp.lkey = mr->lkey;
 456         resp.rkey = mr->rkey;
 457
 458 retry:
 459         if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
 460                 ret = -ENOMEM;
 461                 goto err_unreg;
 462         }
 463
 464         ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
 465
 466         if (ret == -EAGAIN)
 467                 goto retry;
 468         if (ret)
 469                 goto err_unreg;
 470
 471         resp.mr_handle = obj->uobject.id;
 472
 473         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 474                          &resp, sizeof resp)) {
 475                 ret = -EFAULT;
 476                 goto err_idr;
 477         }
 478
 479         down(&file->mutex);
 480         list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
 481         up(&file->mutex);
 482
 483         up(&ib_uverbs_idr_mutex);
 484
 485         return in_len;
 486
 487 err_idr:
 488         idr_remove(&ib_uverbs_mr_idr, obj->uobject.id);
 489
 490 err_unreg:
 491         ib_dereg_mr(mr);
 492         atomic_dec(&pd->usecnt);
 493
 494 err_up:
 495         up(&ib_uverbs_idr_mutex);
 496
 497         ib_umem_release(file->device->ib_dev, &obj->umem);
 498
 499 err_free:
 500         kfree(obj);
 501         return ret;
 502 }
 503
 504 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 505                            const char __user *buf, int in_len,
 506                            int out_len)
 507 {
 508         struct ib_uverbs_dereg_mr cmd;
 509         struct ib_mr             *mr;
 510         struct ib_umem_object    *memobj;
 511         int                       ret = -EINVAL;
 512
 513         if (copy_from_user(&cmd, buf, sizeof cmd))
 514                 return -EFAULT;
 515
 516         down(&ib_uverbs_idr_mutex);
 517
 518         mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
 519         if (!mr || mr->uobject->context != file->ucontext)
 520                 goto out;
 521
 522         memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
 523
 524         ret = ib_dereg_mr(mr);
 525         if (ret)
 526                 goto out;
 527
 528         idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
 529
 530         down(&file->mutex);
 531         list_del(&memobj->uobject.list);
 532         up(&file->mutex);
 533
 534         ib_umem_release(file->device->ib_dev, &memobj->umem);
 535         kfree(memobj);
 536
 537 out:
 538         up(&ib_uverbs_idr_mutex);
 539
 540         return ret ? ret : in_len;
 541 }
 542
 543 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 544                                       const char __user *buf, int in_len,
 545                                       int out_len)
 546 {
 547         struct ib_uverbs_create_comp_channel       cmd;
 548         struct ib_uverbs_create_comp_channel_resp  resp;
 549         struct file                               *filp;
 550
 551         if (out_len < sizeof resp)
 552                 return -ENOSPC;
 553
 554         if (copy_from_user(&cmd, buf, sizeof cmd))
 555                 return -EFAULT;
 556
 557         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 558         if (IS_ERR(filp))
 559                 return PTR_ERR(filp);
 560
 561         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 562                          &resp, sizeof resp)) {
 563                 put_unused_fd(resp.fd);
 564                 fput(filp);
 565                 return -EFAULT;
 566         }
 567
 568         fd_install(resp.fd, filp);
 569         return in_len;
 570 }
 571
 572 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 573                             const char __user *buf, int in_len,
 574                             int out_len)
 575 {
 576         struct ib_uverbs_create_cq      cmd;
 577         struct ib_uverbs_create_cq_resp resp;
 578         struct ib_udata                 udata;
 579         struct ib_ucq_object           *uobj;
 580         struct ib_uverbs_event_file    *ev_file = NULL;
 581         struct ib_cq                   *cq;
 582         int                             ret;
 583
 584         if (out_len < sizeof resp)
 585                 return -ENOSPC;
 586
 587         if (copy_from_user(&cmd, buf, sizeof cmd))
 588                 return -EFAULT;
 589
 590         INIT_UDATA(&udata, buf + sizeof cmd,
 591                    (unsigned long) cmd.response + sizeof resp,
 592                    in_len - sizeof cmd, out_len - sizeof resp);
 593
 594         if (cmd.comp_vector >= file->device->num_comp_vectors)
 595                 return -EINVAL;
 596
 597         if (cmd.comp_channel >= 0)
 598                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 599
 600         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 601         if (!uobj)
 602                 return -ENOMEM;
 603
 604         uobj->uobject.user_handle   = cmd.user_handle;
 605         uobj->uobject.context       = file->ucontext;
 606         uobj->uverbs_file           = file;
 607         uobj->comp_events_reported  = 0;
 608         uobj->async_events_reported = 0;
 609         INIT_LIST_HEAD(&uobj->comp_list);
 610         INIT_LIST_HEAD(&uobj->async_list);
 611
 612         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 613                                              file->ucontext, &udata);
 614         if (IS_ERR(cq)) {
 615                 ret = PTR_ERR(cq);
 616                 goto err;
 617         }
 618
 619         cq->device        = file->device->ib_dev;
 620         cq->uobject       = &uobj->uobject;
 621         cq->comp_handler  = ib_uverbs_comp_handler;
 622         cq->event_handler = ib_uverbs_cq_event_handler;
 623         cq->cq_context    = ev_file;
 624         atomic_set(&cq->usecnt, 0);
 625
 626         down(&ib_uverbs_idr_mutex);
 627
 628 retry:
 629         if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
 630                 ret = -ENOMEM;
 631                 goto err_up;
 632         }
 633
 634         ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);
 635
 636         if (ret == -EAGAIN)
 637                 goto retry;
 638         if (ret)
 639                 goto err_up;
 640
 641         memset(&resp, 0, sizeof resp);
 642         resp.cq_handle = uobj->uobject.id;
 643         resp.cqe       = cq->cqe;
 644
 645         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 646                          &resp, sizeof resp)) {
 647                 ret = -EFAULT;
 648                 goto err_idr;
 649         }
 650
 651         down(&file->mutex);
 652         list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
 653         up(&file->mutex);
 654
 655         up(&ib_uverbs_idr_mutex);
 656
 657         return in_len;
 658
 659 err_idr:
 660         idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);
 661
 662 err_up:
 663         up(&ib_uverbs_idr_mutex);
 664         ib_destroy_cq(cq);
 665
 666 err:
 667         kfree(uobj);
 668         return ret;
 669 }
 670
 671 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 672                           const char __user *buf, int in_len,
 673                           int out_len)
 674 {
 675         struct ib_uverbs_poll_cq       cmd;
 676         struct ib_uverbs_poll_cq_resp *resp;
 677         struct ib_cq                  *cq;
 678         struct ib_wc                  *wc;
 679         int                            ret = 0;
 680         int                            i;
 681         int                            rsize;
 682
 683         if (copy_from_user(&cmd, buf, sizeof cmd))
 684                 return -EFAULT;
 685
 686         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 687         if (!wc)
 688                 return -ENOMEM;
 689
 690         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 691         resp = kmalloc(rsize, GFP_KERNEL);
 692         if (!resp) {
 693                 ret = -ENOMEM;
 694                 goto out_wc;
 695         }
 696
 697         down(&ib_uverbs_idr_mutex);
 698         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 699         if (!cq || cq->uobject->context != file->ucontext) {
 700                 ret = -EINVAL;
 701                 goto out;
 702         }
 703
 704         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 705
 706         for (i = 0; i < resp->count; i++) {
 707                 resp->wc[i].wr_id          = wc[i].wr_id;
 708                 resp->wc[i].status         = wc[i].status;
 709                 resp->wc[i].opcode         = wc[i].opcode;
 710                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 711                 resp->wc[i].byte_len       = wc[i].byte_len;
 712                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 713                 resp->wc[i].qp_num         = wc[i].qp_num;
 714                 resp->wc[i].src_qp         = wc[i].src_qp;
 715                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 716                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 717                 resp->wc[i].slid           = wc[i].slid;
 718                 resp->wc[i].sl             = wc[i].sl;
 719                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 720                 resp->wc[i].port_num       = wc[i].port_num;
 721         }
 722
 723         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 724                 ret = -EFAULT;
 725
 726 out:
 727         up(&ib_uverbs_idr_mutex);
 728         kfree(resp);
 729
 730 out_wc:
 731         kfree(wc);
 732         return ret ? ret : in_len;
 733 }
 734
 735 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 736                                 const char __user *buf, int in_len,
 737                                 int out_len)
 738 {
 739         struct ib_uverbs_req_notify_cq cmd;
 740         struct ib_cq                  *cq;
 741         int                            ret = -EINVAL;
 742
 743         if (copy_from_user(&cmd, buf, sizeof cmd))
 744                 return -EFAULT;
 745
 746         down(&ib_uverbs_idr_mutex);
 747         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 748         if (cq && cq->uobject->context == file->ucontext) {
 749                 ib_req_notify_cq(cq, cmd.solicited_only ?
 750                                         IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 751                 ret = in_len;
 752         }
 753         up(&ib_uverbs_idr_mutex);
 754
 755         return ret;
 756 }
 757
 758 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 759                              const char __user *buf, int in_len,
 760                              int out_len)
 761 {
 762         struct ib_uverbs_destroy_cq      cmd;
 763         struct ib_uverbs_destroy_cq_resp resp;
 764         struct ib_cq                    *cq;
 765         struct ib_ucq_object            *uobj;
 766         struct ib_uverbs_event_file     *ev_file;
 767         u64                              user_handle;
 768         int                              ret = -EINVAL;
 769
 770         if (copy_from_user(&cmd, buf, sizeof cmd))
 771                 return -EFAULT;
 772
 773         memset(&resp, 0, sizeof resp);
 774
 775         down(&ib_uverbs_idr_mutex);
 776
 777         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 778         if (!cq || cq->uobject->context != file->ucontext)
 779                 goto out;
 780
 781         user_handle = cq->uobject->user_handle;
 782         uobj        = container_of(cq->uobject, struct ib_ucq_object, uobject);
 783         ev_file     = cq->cq_context;
 784
 785         ret = ib_destroy_cq(cq);
 786         if (ret)
 787                 goto out;
 788
 789         idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
 790
 791         down(&file->mutex);
 792         list_del(&uobj->uobject.list);
 793         up(&file->mutex);
 794
 795         ib_uverbs_release_ucq(file, ev_file, uobj);
 796
 797         resp.comp_events_reported  = uobj->comp_events_reported;
 798         resp.async_events_reported = uobj->async_events_reported;
 799
 800         kfree(uobj);
 801
 802         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 803                          &resp, sizeof resp))
 804                 ret = -EFAULT;
 805
 806 out:
 807         up(&ib_uverbs_idr_mutex);
 808
 809         return ret ? ret : in_len;
 810 }
 811
 812 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 813                             const char __user *buf, int in_len,
 814                             int out_len)
 815 {
 816         struct ib_uverbs_create_qp      cmd;
 817         struct ib_uverbs_create_qp_resp resp;
 818         struct ib_udata                 udata;
 819         struct ib_uqp_object           *uobj;
 820         struct ib_pd                   *pd;
 821         struct ib_cq                   *scq, *rcq;
 822         struct ib_srq                  *srq;
 823         struct ib_qp                   *qp;
 824         struct ib_qp_init_attr          attr;
 825         int ret;
 826
 827         if (out_len < sizeof resp)
 828                 return -ENOSPC;
 829
 830         if (copy_from_user(&cmd, buf, sizeof cmd))
 831                 return -EFAULT;
 832
 833         INIT_UDATA(&udata, buf + sizeof cmd,
 834                    (unsigned long) cmd.response + sizeof resp,
 835                    in_len - sizeof cmd, out_len - sizeof resp);
 836
 837         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 838         if (!uobj)
 839                 return -ENOMEM;
 840
 841         down(&ib_uverbs_idr_mutex);
 842
 843         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
 844         scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
 845         rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
 846         srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
 847
 848         if (!pd  || pd->uobject->context  != file->ucontext ||
 849             !scq || scq->uobject->context != file->ucontext ||
 850             !rcq || rcq->uobject->context != file->ucontext ||
 851             (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
 852                 ret = -EINVAL;
 853                 goto err_up;
 854         }
 855
 856         attr.event_handler = ib_uverbs_qp_event_handler;
 857         attr.qp_context    = file;
 858         attr.send_cq       = scq;
 859         attr.recv_cq       = rcq;
 860         attr.srq           = srq;
 861         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
 862         attr.qp_type       = cmd.qp_type;
 863
 864         attr.cap.max_send_wr     = cmd.max_send_wr;
 865         attr.cap.max_recv_wr     = cmd.max_recv_wr;
 866         attr.cap.max_send_sge    = cmd.max_send_sge;
 867         attr.cap.max_recv_sge    = cmd.max_recv_sge;
 868         attr.cap.max_inline_data = cmd.max_inline_data;
 869
 870         uobj->uevent.uobject.user_handle = cmd.user_handle;
 871         uobj->uevent.uobject.context     = file->ucontext;
 872         uobj->uevent.events_reported     = 0;
 873         INIT_LIST_HEAD(&uobj->uevent.event_list);
 874         INIT_LIST_HEAD(&uobj->mcast_list);
 875
 876         qp = pd->device->create_qp(pd, &attr, &udata);
 877         if (IS_ERR(qp)) {
 878                 ret = PTR_ERR(qp);
 879                 goto err_up;
 880         }
 881
 882         qp->device        = pd->device;
 883         qp->pd            = pd;
 884         qp->send_cq       = attr.send_cq;
 885         qp->recv_cq       = attr.recv_cq;
 886         qp->srq           = attr.srq;
 887         qp->uobject       = &uobj->uevent.uobject;
 888         qp->event_handler = attr.event_handler;
 889         qp->qp_context    = attr.qp_context;
 890         qp->qp_type       = attr.qp_type;
 891         atomic_inc(&pd->usecnt);
 892         atomic_inc(&attr.send_cq->usecnt);
 893         atomic_inc(&attr.recv_cq->usecnt);
 894         if (attr.srq)
 895                 atomic_inc(&attr.srq->usecnt);
 896
 897         memset(&resp, 0, sizeof resp);
 898         resp.qpn = qp->qp_num;
 899
 900 retry:
 901         if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
 902                 ret = -ENOMEM;
 903                 goto err_destroy;
 904         }
 905
 906         ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uevent.uobject.id);
 907
 908         if (ret == -EAGAIN)
 909                 goto retry;
 910         if (ret)
 911                 goto err_destroy;
 912
 913         resp.qp_handle       = uobj->uevent.uobject.id;
 914         resp.max_recv_sge    = attr.cap.max_recv_sge;
 915         resp.max_send_sge    = attr.cap.max_send_sge;
 916         resp.max_recv_wr     = attr.cap.max_recv_wr;
 917         resp.max_send_wr     = attr.cap.max_send_wr;
 918         resp.max_inline_data = attr.cap.max_inline_data;
 919
 920         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 921                          &resp, sizeof resp)) {
 922                 ret = -EFAULT;
 923                 goto err_idr;
 924         }
 925
 926         down(&file->mutex);
 927         list_add_tail(&uobj->uevent.uobject.list, &file->ucontext->qp_list);
 928         up(&file->mutex);
 929
 930         up(&ib_uverbs_idr_mutex);
 931
 932         return in_len;
 933
 934 err_idr:
 935         idr_remove(&ib_uverbs_qp_idr, uobj->uevent.uobject.id);
 936
 937 err_destroy:
 938         ib_destroy_qp(qp);
 939         atomic_dec(&pd->usecnt);
 940         atomic_dec(&attr.send_cq->usecnt);
 941         atomic_dec(&attr.recv_cq->usecnt);
 942         if (attr.srq)
 943                 atomic_dec(&attr.srq->usecnt);
 944
 945 err_up:
 946         up(&ib_uverbs_idr_mutex);
 947
 948         kfree(uobj);
 949         return ret;
 950 }
 951
 952 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
 953                             const char __user *buf, int in_len,
 954                             int out_len)
 955 {
 956         struct ib_uverbs_modify_qp cmd;
 957         struct ib_qp              *qp;
 958         struct ib_qp_attr         *attr;
 959         int                        ret;
 960
 961         if (copy_from_user(&cmd, buf, sizeof cmd))
 962                 return -EFAULT;
 963
 964         attr = kmalloc(sizeof *attr, GFP_KERNEL);
 965         if (!attr)
 966                 return -ENOMEM;
 967
 968         down(&ib_uverbs_idr_mutex);
 969
 970         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
 971         if (!qp || qp->uobject->context != file->ucontext) {
 972                 ret = -EINVAL;
 973                 goto out;
 974         }
 975
 976         attr->qp_state            = cmd.qp_state;
 977         attr->cur_qp_state        = cmd.cur_qp_state;
 978         attr->path_mtu            = cmd.path_mtu;
 979         attr->path_mig_state      = cmd.path_mig_state;
 980         attr->qkey                = cmd.qkey;
 981         attr->rq_psn              = cmd.rq_psn;
 982         attr->sq_psn              = cmd.sq_psn;
 983         attr->dest_qp_num         = cmd.dest_qp_num;
 984         attr->qp_access_flags     = cmd.qp_access_flags;
 985         attr->pkey_index          = cmd.pkey_index;
 986         attr->alt_pkey_index      = cmd.pkey_index;
 987         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
 988         attr->max_rd_atomic       = cmd.max_rd_atomic;
 989         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
 990         attr->min_rnr_timer       = cmd.min_rnr_timer;
 991         attr->port_num            = cmd.port_num;
 992         attr->timeout             = cmd.timeout;
 993         attr->retry_cnt           = cmd.retry_cnt;
 994         attr->rnr_retry           = cmd.rnr_retry;
 995         attr->alt_port_num        = cmd.alt_port_num;
 996         attr->alt_timeout         = cmd.alt_timeout;
 997
 998         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
 999         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1000         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1001         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1002         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1003         attr->ah_attr.dlid                  = cmd.dest.dlid;
1004         attr->ah_attr.sl                    = cmd.dest.sl;
1005         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1006         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1007         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1008         attr->ah_attr.port_num              = cmd.dest.port_num;
1009
1010         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1011         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1012         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1013         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1014         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1015         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1016         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1017         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1018         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1019         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1020         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1021
1022         ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1023         if (ret)
1024                 goto out;
1025
1026         ret = in_len;
1027
1028 out:
1029         up(&ib_uverbs_idr_mutex);
1030         kfree(attr);
1031
1032         return ret;
1033 }
1034
1035 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1036                              const char __user *buf, int in_len,
1037                              int out_len)
1038 {
1039         struct ib_uverbs_destroy_qp      cmd;
1040         struct ib_uverbs_destroy_qp_resp resp;
1041         struct ib_qp                    *qp;
1042         struct ib_uqp_object            *uobj;
1043         int                              ret = -EINVAL;
1044
1045         if (copy_from_user(&cmd, buf, sizeof cmd))
1046                 return -EFAULT;
1047
1048         memset(&resp, 0, sizeof resp);
1049
1050         down(&ib_uverbs_idr_mutex);
1051
1052         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1053         if (!qp || qp->uobject->context != file->ucontext)
1054                 goto out;
1055
1056         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1057
1058         if (!list_empty(&uobj->mcast_list)) {
1059                 ret = -EBUSY;
1060                 goto out;
1061         }
1062
1063         ret = ib_destroy_qp(qp);
1064         if (ret)
1065                 goto out;
1066
1067         idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
1068
1069         down(&file->mutex);
1070         list_del(&uobj->uevent.uobject.list);
1071         up(&file->mutex);
1072
1073         ib_uverbs_release_uevent(file, &uobj->uevent);
1074
1075         resp.events_reported = uobj->uevent.events_reported;
1076
1077         kfree(uobj);
1078
1079         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1080                          &resp, sizeof resp))
1081                 ret = -EFAULT;
1082
1083 out:
1084         up(&ib_uverbs_idr_mutex);
1085
1086         return ret ? ret : in_len;
1087 }
1088
1089 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1090                             const char __user *buf, int in_len,
1091                             int out_len)
1092 {
1093         struct ib_uverbs_post_send      cmd;
1094         struct ib_uverbs_post_send_resp resp;
1095         struct ib_uverbs_send_wr       *user_wr;
1096         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1097         struct ib_qp                   *qp;
1098         int                             i, sg_ind;
1099         ssize_t                         ret = -EINVAL;
1100
1101         if (copy_from_user(&cmd, buf, sizeof cmd))
1102                 return -EFAULT;
1103
1104         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1105             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1106                 return -EINVAL;
1107
1108         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1109                 return -EINVAL;
1110
1111         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1112         if (!user_wr)
1113                 return -ENOMEM;
1114
1115         down(&ib_uverbs_idr_mutex);
1116
1117         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1118         if (!qp || qp->uobject->context != file->ucontext)
1119                 goto out;
1120
1121         sg_ind = 0;
1122         last = NULL;
1123         for (i = 0; i < cmd.wr_count; ++i) {
1124                 if (copy_from_user(user_wr,
1125                                    buf + sizeof cmd + i * cmd.wqe_size,
1126                                    cmd.wqe_size)) {
1127                         ret = -EFAULT;
1128                         goto out;
1129                 }
1130
1131                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1132                         ret = -EINVAL;
1133                         goto out;
1134                 }
1135
1136                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1137                                user_wr->num_sge * sizeof (struct ib_sge),
1138                                GFP_KERNEL);
1139                 if (!next) {
1140                         ret = -ENOMEM;
1141                         goto out;
1142                 }
1143
1144                 if (!last)
1145                         wr = next;
1146                 else
1147                         last->next = next;
1148                 last = next;
1149
1150                 next->next       = NULL;
1151                 next->wr_id      = user_wr->wr_id;
1152                 next->num_sge    = user_wr->num_sge;
1153                 next->opcode     = user_wr->opcode;
1154                 next->send_flags = user_wr->send_flags;
1155                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1156
1157                 if (qp->qp_type == IB_QPT_UD) {
1158                         next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr,
1159                                                   user_wr->wr.ud.ah);
1160                         if (!next->wr.ud.ah) {
1161                                 ret = -EINVAL;
1162                                 goto out;
1163                         }
1164                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1165                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1166                 } else {
1167                         switch (next->opcode) {
1168                         case IB_WR_RDMA_WRITE:
1169                         case IB_WR_RDMA_WRITE_WITH_IMM:
1170                         case IB_WR_RDMA_READ:
1171                                 next->wr.rdma.remote_addr =
1172                                         user_wr->wr.rdma.remote_addr;
1173                                 next->wr.rdma.rkey        =
1174                                         user_wr->wr.rdma.rkey;
1175                                 break;
1176                         case IB_WR_ATOMIC_CMP_AND_SWP:
1177                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1178                                 next->wr.atomic.remote_addr =
1179                                         user_wr->wr.atomic.remote_addr;
1180                                 next->wr.atomic.compare_add =
1181                                         user_wr->wr.atomic.compare_add;
1182                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1183                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1184                                 break;
1185                         default:
1186                                 break;
1187                         }
1188                 }
1189
1190                 if (next->num_sge) {
1191                         next->sg_list = (void *) next +
1192                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1193                         if (copy_from_user(next->sg_list,
1194                                            buf + sizeof cmd +
1195                                            cmd.wr_count * cmd.wqe_size +
1196                                            sg_ind * sizeof (struct ib_sge),
1197                                            next->num_sge * sizeof (struct ib_sge))) {
1198                                 ret = -EFAULT;
1199                                 goto out;
1200                         }
1201                         sg_ind += next->num_sge;
1202                 } else
1203                         next->sg_list = NULL;
1204         }
1205
1206         resp.bad_wr = 0;
1207         ret = qp->device->post_send(qp, wr, &bad_wr);
1208         if (ret)
1209                 for (next = wr; next; next = next->next) {
1210                         ++resp.bad_wr;
1211                         if (next == bad_wr)
1212                                 break;
1213                 }
1214
1215         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1216                          &resp, sizeof resp))
1217                 ret = -EFAULT;
1218
1219 out:
1220         up(&ib_uverbs_idr_mutex);
1221
1222         while (wr) {
1223                 next = wr->next;
1224                 kfree(wr);
1225                 wr = next;
1226         }
1227
1228         kfree(user_wr);
1229
1230         return ret ? ret : in_len;
1231 }
1232
1233 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1234                                                     int in_len,
1235                                                     u32 wr_count,
1236                                                     u32 sge_count,
1237                                                     u32 wqe_size)
1238 {
1239         struct ib_uverbs_recv_wr *user_wr;
1240         struct ib_recv_wr        *wr = NULL, *last, *next;
1241         int                       sg_ind;
1242         int                       i;
1243         int                       ret;
1244
1245         if (in_len < wqe_size * wr_count +
1246             sge_count * sizeof (struct ib_uverbs_sge))
1247                 return ERR_PTR(-EINVAL);
1248
1249         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1250                 return ERR_PTR(-EINVAL);
1251
1252         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1253         if (!user_wr)
1254                 return ERR_PTR(-ENOMEM);
1255
1256         sg_ind = 0;
1257         last = NULL;
1258         for (i = 0; i < wr_count; ++i) {
1259                 if (copy_from_user(user_wr, buf + i * wqe_size,
1260                                    wqe_size)) {
1261                         ret = -EFAULT;
1262                         goto err;
1263                 }
1264
1265                 if (user_wr->num_sge + sg_ind > sge_count) {
1266                         ret = -EINVAL;
1267                         goto err;
1268                 }
1269
1270                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1271                                user_wr->num_sge * sizeof (struct ib_sge),
1272                                GFP_KERNEL);
1273                 if (!next) {
1274                         ret = -ENOMEM;
1275                         goto err;
1276                 }
1277
1278                 if (!last)
1279                         wr = next;
1280                 else
1281                         last->next = next;
1282                 last = next;
1283
1284                 next->next       = NULL;
1285                 next->wr_id      = user_wr->wr_id;
1286                 next->num_sge    = user_wr->num_sge;
1287
1288                 if (next->num_sge) {
1289                         next->sg_list = (void *) next +
1290                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1291                         if (copy_from_user(next->sg_list,
1292                                            buf + wr_count * wqe_size +
1293                                            sg_ind * sizeof (struct ib_sge),
1294                                            next->num_sge * sizeof (struct ib_sge))) {
1295                                 ret = -EFAULT;
1296                                 goto err;
1297                         }
1298                         sg_ind += next->num_sge;
1299                 } else
1300                         next->sg_list = NULL;
1301         }
1302
1303         kfree(user_wr);
1304         return wr;
1305
1306 err:
1307         kfree(user_wr);
1308
1309         while (wr) {
1310                 next = wr->next;
1311                 kfree(wr);
1312                 wr = next;
1313         }
1314
1315         return ERR_PTR(ret);
1316 }
1317
1318 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1319                             const char __user *buf, int in_len,
1320                             int out_len)
1321 {
1322         struct ib_uverbs_post_recv      cmd;
1323         struct ib_uverbs_post_recv_resp resp;
1324         struct ib_recv_wr              *wr, *next, *bad_wr;
1325         struct ib_qp                   *qp;
1326         ssize_t                         ret = -EINVAL;
1327
1328         if (copy_from_user(&cmd, buf, sizeof cmd))
1329                 return -EFAULT;
1330
1331         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1332                                        in_len - sizeof cmd, cmd.wr_count,
1333                                        cmd.sge_count, cmd.wqe_size);
1334         if (IS_ERR(wr))
1335                 return PTR_ERR(wr);
1336
1337         down(&ib_uverbs_idr_mutex);
1338
1339         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1340         if (!qp || qp->uobject->context != file->ucontext)
1341                 goto out;
1342
1343         resp.bad_wr = 0;
1344         ret = qp->device->post_recv(qp, wr, &bad_wr);
1345         if (ret)
1346                 for (next = wr; next; next = next->next) {
1347                         ++resp.bad_wr;
1348                         if (next == bad_wr)
1349                                 break;
1350                 }
1351
1352
1353         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1354                          &resp, sizeof resp))
1355                 ret = -EFAULT;
1356
1357 out:
1358         up(&ib_uverbs_idr_mutex);
1359
1360         while (wr) {
1361                 next = wr->next;
1362                 kfree(wr);
1363                 wr = next;
1364         }
1365
1366         return ret ? ret : in_len;
1367 }
1368
1369 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1370                             const char __user *buf, int in_len,
1371                             int out_len)
1372 {
1373         struct ib_uverbs_post_srq_recv      cmd;
1374         struct ib_uverbs_post_srq_recv_resp resp;
1375         struct ib_recv_wr                  *wr, *next, *bad_wr;
1376         struct ib_srq                      *srq;
1377         ssize_t                             ret = -EINVAL;
1378
1379         if (copy_from_user(&cmd, buf, sizeof cmd))
1380                 return -EFAULT;
1381
1382         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1383                                        in_len - sizeof cmd, cmd.wr_count,
1384                                        cmd.sge_count, cmd.wqe_size);
1385         if (IS_ERR(wr))
1386                 return PTR_ERR(wr);
1387
1388         down(&ib_uverbs_idr_mutex);
1389
1390         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1391         if (!srq || srq->uobject->context != file->ucontext)
1392                 goto out;
1393
1394         resp.bad_wr = 0;
1395         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1396         if (ret)
1397                 for (next = wr; next; next = next->next) {
1398                         ++resp.bad_wr;
1399                         if (next == bad_wr)
1400                                 break;
1401                 }
1402
1403
1404         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1405                          &resp, sizeof resp))
1406                 ret = -EFAULT;
1407
1408 out:
1409         up(&ib_uverbs_idr_mutex);
1410
1411         while (wr) {
1412                 next = wr->next;
1413                 kfree(wr);
1414                 wr = next;
1415         }
1416
1417         return ret ? ret : in_len;
1418 }
1419
1420 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1421                             const char __user *buf, int in_len,
1422                             int out_len)
1423 {
1424         struct ib_uverbs_create_ah       cmd;
1425         struct ib_uverbs_create_ah_resp  resp;
1426         struct ib_uobject               *uobj;
1427         struct ib_pd                    *pd;
1428         struct ib_ah                    *ah;
1429         struct ib_ah_attr               attr;
1430         int ret;
1431
1432         if (out_len < sizeof resp)
1433                 return -ENOSPC;
1434
1435         if (copy_from_user(&cmd, buf, sizeof cmd))
1436                 return -EFAULT;
1437
1438         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1439         if (!uobj)
1440                 return -ENOMEM;
1441
1442         down(&ib_uverbs_idr_mutex);
1443
1444         pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1445         if (!pd || pd->uobject->context != file->ucontext) {
1446                 ret = -EINVAL;
1447                 goto err_up;
1448         }
1449
1450         uobj->user_handle = cmd.user_handle;
1451         uobj->context     = file->ucontext;
1452
1453         attr.dlid              = cmd.attr.dlid;
1454         attr.sl                = cmd.attr.sl;
1455         attr.src_path_bits     = cmd.attr.src_path_bits;
1456         attr.static_rate       = cmd.attr.static_rate;
1457         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1458         attr.port_num          = cmd.attr.port_num;
1459         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1460         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1461         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1462         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1463         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1464
1465         ah = ib_create_ah(pd, &attr);
1466         if (IS_ERR(ah)) {
1467                 ret = PTR_ERR(ah);
1468                 goto err_up;
1469         }
1470
1471         ah->uobject = uobj;
1472
1473 retry:
1474         if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) {
1475                 ret = -ENOMEM;
1476                 goto err_destroy;
1477         }
1478
1479         ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id);
1480
1481         if (ret == -EAGAIN)
1482                 goto retry;
1483         if (ret)
1484                 goto err_destroy;
1485
1486         resp.ah_handle = uobj->id;
1487
1488         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1489                          &resp, sizeof resp)) {
1490                 ret = -EFAULT;
1491                 goto err_idr;
1492         }
1493
1494         down(&file->mutex);
1495         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1496         up(&file->mutex);
1497
1498         up(&ib_uverbs_idr_mutex);
1499
1500         return in_len;
1501
1502 err_idr:
1503         idr_remove(&ib_uverbs_ah_idr, uobj->id);
1504
1505 err_destroy:
1506         ib_destroy_ah(ah);
1507
1508 err_up:
1509         up(&ib_uverbs_idr_mutex);
1510
1511         kfree(uobj);
1512         return ret;
1513 }
1514
1515 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1516                              const char __user *buf, int in_len, int out_len)
1517 {
1518         struct ib_uverbs_destroy_ah cmd;
1519         struct ib_ah               *ah;
1520         struct ib_uobject          *uobj;
1521         int                         ret = -EINVAL;
1522
1523         if (copy_from_user(&cmd, buf, sizeof cmd))
1524                 return -EFAULT;
1525
1526         down(&ib_uverbs_idr_mutex);
1527
1528         ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle);
1529         if (!ah || ah->uobject->context != file->ucontext)
1530                 goto out;
1531
1532         uobj = ah->uobject;
1533
1534         ret = ib_destroy_ah(ah);
1535         if (ret)
1536                 goto out;
1537
1538         idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle);
1539
1540         down(&file->mutex);
1541         list_del(&uobj->list);
1542         up(&file->mutex);
1543
1544         kfree(uobj);
1545
1546 out:
1547         up(&ib_uverbs_idr_mutex);
1548
1549         return ret ? ret : in_len;
1550 }
1551
1552 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1553                                const char __user *buf, int in_len,
1554                                int out_len)
1555 {
1556         struct ib_uverbs_attach_mcast cmd;
1557         struct ib_qp                 *qp;
1558         struct ib_uqp_object         *uobj;
1559         struct ib_uverbs_mcast_entry *mcast;
1560         int                           ret = -EINVAL;
1561
1562         if (copy_from_user(&cmd, buf, sizeof cmd))
1563                 return -EFAULT;
1564
1565         down(&ib_uverbs_idr_mutex);
1566
1567         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1568         if (!qp || qp->uobject->context != file->ucontext)
1569                 goto out;
1570
1571         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1572
1573         list_for_each_entry(mcast, &uobj->mcast_list, list)
1574                 if (cmd.mlid == mcast->lid &&
1575                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1576                         ret = 0;
1577                         goto out;
1578                 }
1579
1580         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1581         if (!mcast) {
1582                 ret = -ENOMEM;
1583                 goto out;
1584         }
1585
1586         mcast->lid = cmd.mlid;
1587         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1588
1589         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1590         if (!ret) {
1591                 uobj = container_of(qp->uobject, struct ib_uqp_object,
1592                                     uevent.uobject);
1593                 list_add_tail(&mcast->list, &uobj->mcast_list);
1594         } else
1595                 kfree(mcast);
1596
1597 out:
1598         up(&ib_uverbs_idr_mutex);
1599
1600         return ret ? ret : in_len;
1601 }
1602
1603 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1604                                const char __user *buf, int in_len,
1605                                int out_len)
1606 {
1607         struct ib_uverbs_detach_mcast cmd;
1608         struct ib_uqp_object         *uobj;
1609         struct ib_qp                 *qp;
1610         struct ib_uverbs_mcast_entry *mcast;
1611         int                           ret = -EINVAL;
1612
1613         if (copy_from_user(&cmd, buf, sizeof cmd))
1614                 return -EFAULT;
1615
1616         down(&ib_uverbs_idr_mutex);
1617
1618         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1619         if (!qp || qp->uobject->context != file->ucontext)
1620                 goto out;
1621
1622         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1623         if (ret)
1624                 goto out;
1625
1626         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1627
1628         list_for_each_entry(mcast, &uobj->mcast_list, list)
1629                 if (cmd.mlid == mcast->lid &&
1630                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1631                         list_del(&mcast->list);
1632                         kfree(mcast);
1633                         break;
1634                 }
1635
1636 out:
1637         up(&ib_uverbs_idr_mutex);
1638
1639         return ret ? ret : in_len;
1640 }
1641
1642 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1643                              const char __user *buf, int in_len,
1644                              int out_len)
1645 {
1646         struct ib_uverbs_create_srq      cmd;
1647         struct ib_uverbs_create_srq_resp resp;
1648         struct ib_udata                  udata;
1649         struct ib_uevent_object         *uobj;
1650         struct ib_pd                    *pd;
1651         struct ib_srq                   *srq;
1652         struct ib_srq_init_attr          attr;
1653         int ret;
1654
1655         if (out_len < sizeof resp)
1656                 return -ENOSPC;
1657
1658         if (copy_from_user(&cmd, buf, sizeof cmd))
1659                 return -EFAULT;
1660
1661         INIT_UDATA(&udata, buf + sizeof cmd,
1662                    (unsigned long) cmd.response + sizeof resp,
1663                    in_len - sizeof cmd, out_len - sizeof resp);
1664
1665         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1666         if (!uobj)
1667                 return -ENOMEM;
1668
1669         down(&ib_uverbs_idr_mutex);
1670
1671         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1672
1673         if (!pd || pd->uobject->context != file->ucontext) {
1674                 ret = -EINVAL;
1675                 goto err_up;
1676         }
1677
1678         attr.event_handler  = ib_uverbs_srq_event_handler;
1679         attr.srq_context    = file;
1680         attr.attr.max_wr    = cmd.max_wr;
1681         attr.attr.max_sge   = cmd.max_sge;
1682         attr.attr.srq_limit = cmd.srq_limit;
1683
1684         uobj->uobject.user_handle = cmd.user_handle;
1685         uobj->uobject.context     = file->ucontext;
1686         uobj->events_reported     = 0;
1687         INIT_LIST_HEAD(&uobj->event_list);
1688
1689         srq = pd->device->create_srq(pd, &attr, &udata);
1690         if (IS_ERR(srq)) {
1691                 ret = PTR_ERR(srq);
1692                 goto err_up;
1693         }
1694
1695         srq->device        = pd->device;
1696         srq->pd            = pd;
1697         srq->uobject       = &uobj->uobject;
1698         srq->event_handler = attr.event_handler;
1699         srq->srq_context   = attr.srq_context;
1700         atomic_inc(&pd->usecnt);
1701         atomic_set(&srq->usecnt, 0);
1702
1703         memset(&resp, 0, sizeof resp);
1704
1705 retry:
1706         if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
1707                 ret = -ENOMEM;
1708                 goto err_destroy;
1709         }
1710
1711         ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id);
1712
1713         if (ret == -EAGAIN)
1714                 goto retry;
1715         if (ret)
1716                 goto err_destroy;
1717
1718         resp.srq_handle = uobj->uobject.id;
1719
1720         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1721                          &resp, sizeof resp)) {
1722                 ret = -EFAULT;
1723                 goto err_idr;
1724         }
1725
1726         down(&file->mutex);
1727         list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list);
1728         up(&file->mutex);
1729
1730         up(&ib_uverbs_idr_mutex);
1731
1732         return in_len;
1733
1734 err_idr:
1735         idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id);
1736
1737 err_destroy:
1738         ib_destroy_srq(srq);
1739         atomic_dec(&pd->usecnt);
1740
1741 err_up:
1742         up(&ib_uverbs_idr_mutex);
1743
1744         kfree(uobj);
1745         return ret;
1746 }
1747
1748 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
1749                              const char __user *buf, int in_len,
1750                              int out_len)
1751 {
1752         struct ib_uverbs_modify_srq cmd;
1753         struct ib_srq              *srq;
1754         struct ib_srq_attr          attr;
1755         int                         ret;
1756
1757         if (copy_from_user(&cmd, buf, sizeof cmd))
1758                 return -EFAULT;
1759
1760         down(&ib_uverbs_idr_mutex);
1761
1762         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1763         if (!srq || srq->uobject->context != file->ucontext) {
1764                 ret = -EINVAL;
1765                 goto out;
1766         }
1767
1768         attr.max_wr    = cmd.max_wr;
1769         attr.srq_limit = cmd.srq_limit;
1770
1771         ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
1772
1773 out:
1774         up(&ib_uverbs_idr_mutex);
1775
1776         return ret ? ret : in_len;
1777 }
1778
1779 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
1780                               const char __user *buf, int in_len,
1781                               int out_len)
1782 {
1783         struct ib_uverbs_destroy_srq      cmd;
1784         struct ib_uverbs_destroy_srq_resp resp;
1785         struct ib_srq                    *srq;
1786         struct ib_uevent_object          *uobj;
1787         int                               ret = -EINVAL;
1788
1789         if (copy_from_user(&cmd, buf, sizeof cmd))
1790                 return -EFAULT;
1791
1792         down(&ib_uverbs_idr_mutex);
1793
1794         memset(&resp, 0, sizeof resp);
1795
1796         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1797         if (!srq || srq->uobject->context != file->ucontext)
1798                 goto out;
1799
1800         uobj = container_of(srq->uobject, struct ib_uevent_object, uobject);
1801
1802         ret = ib_destroy_srq(srq);
1803         if (ret)
1804                 goto out;
1805
1806         idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
1807
1808         down(&file->mutex);
1809         list_del(&uobj->uobject.list);
1810         up(&file->mutex);
1811
1812         ib_uverbs_release_uevent(file, uobj);
1813
1814         resp.events_reported = uobj->events_reported;
1815
1816         kfree(uobj);
1817
1818         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1819                          &resp, sizeof resp))
1820                 ret = -EFAULT;
1821
1822 out:
1823         up(&ib_uverbs_idr_mutex);
1824
1825         return ret ? ret : in_len;
1826 }