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   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         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 598         if (!uobj)
 599                 return -ENOMEM;
 600
 601         if (cmd.comp_channel >= 0) {
 602                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 603                 if (!ev_file) {
 604                         ret = -EINVAL;
 605                         goto err;
 606                 }
 607         }
 608
 609         uobj->uobject.user_handle   = cmd.user_handle;
 610         uobj->uobject.context       = file->ucontext;
 611         uobj->uverbs_file           = file;
 612         uobj->comp_events_reported  = 0;
 613         uobj->async_events_reported = 0;
 614         INIT_LIST_HEAD(&uobj->comp_list);
 615         INIT_LIST_HEAD(&uobj->async_list);
 616
 617         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 618                                              file->ucontext, &udata);
 619         if (IS_ERR(cq)) {
 620                 ret = PTR_ERR(cq);
 621                 goto err;
 622         }
 623
 624         cq->device        = file->device->ib_dev;
 625         cq->uobject       = &uobj->uobject;
 626         cq->comp_handler  = ib_uverbs_comp_handler;
 627         cq->event_handler = ib_uverbs_cq_event_handler;
 628         cq->cq_context    = ev_file;
 629         atomic_set(&cq->usecnt, 0);
 630
 631         down(&ib_uverbs_idr_mutex);
 632
 633 retry:
 634         if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
 635                 ret = -ENOMEM;
 636                 goto err_up;
 637         }
 638
 639         ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);
 640
 641         if (ret == -EAGAIN)
 642                 goto retry;
 643         if (ret)
 644                 goto err_up;
 645
 646         memset(&resp, 0, sizeof resp);
 647         resp.cq_handle = uobj->uobject.id;
 648         resp.cqe       = cq->cqe;
 649
 650         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 651                          &resp, sizeof resp)) {
 652                 ret = -EFAULT;
 653                 goto err_idr;
 654         }
 655
 656         down(&file->mutex);
 657         list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
 658         up(&file->mutex);
 659
 660         up(&ib_uverbs_idr_mutex);
 661
 662         return in_len;
 663
 664 err_idr:
 665         idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);
 666
 667 err_up:
 668         up(&ib_uverbs_idr_mutex);
 669         ib_destroy_cq(cq);
 670
 671 err:
 672         if (ev_file)
 673                 ib_uverbs_release_ucq(file, ev_file, uobj);
 674         kfree(uobj);
 675         return ret;
 676 }
 677
 678 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 679                           const char __user *buf, int in_len,
 680                           int out_len)
 681 {
 682         struct ib_uverbs_poll_cq       cmd;
 683         struct ib_uverbs_poll_cq_resp *resp;
 684         struct ib_cq                  *cq;
 685         struct ib_wc                  *wc;
 686         int                            ret = 0;
 687         int                            i;
 688         int                            rsize;
 689
 690         if (copy_from_user(&cmd, buf, sizeof cmd))
 691                 return -EFAULT;
 692
 693         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 694         if (!wc)
 695                 return -ENOMEM;
 696
 697         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 698         resp = kmalloc(rsize, GFP_KERNEL);
 699         if (!resp) {
 700                 ret = -ENOMEM;
 701                 goto out_wc;
 702         }
 703
 704         down(&ib_uverbs_idr_mutex);
 705         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 706         if (!cq || cq->uobject->context != file->ucontext) {
 707                 ret = -EINVAL;
 708                 goto out;
 709         }
 710
 711         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 712
 713         for (i = 0; i < resp->count; i++) {
 714                 resp->wc[i].wr_id          = wc[i].wr_id;
 715                 resp->wc[i].status         = wc[i].status;
 716                 resp->wc[i].opcode         = wc[i].opcode;
 717                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 718                 resp->wc[i].byte_len       = wc[i].byte_len;
 719                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 720                 resp->wc[i].qp_num         = wc[i].qp_num;
 721                 resp->wc[i].src_qp         = wc[i].src_qp;
 722                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 723                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 724                 resp->wc[i].slid           = wc[i].slid;
 725                 resp->wc[i].sl             = wc[i].sl;
 726                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 727                 resp->wc[i].port_num       = wc[i].port_num;
 728         }
 729
 730         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 731                 ret = -EFAULT;
 732
 733 out:
 734         up(&ib_uverbs_idr_mutex);
 735         kfree(resp);
 736
 737 out_wc:
 738         kfree(wc);
 739         return ret ? ret : in_len;
 740 }
 741
 742 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 743                                 const char __user *buf, int in_len,
 744                                 int out_len)
 745 {
 746         struct ib_uverbs_req_notify_cq cmd;
 747         struct ib_cq                  *cq;
 748         int                            ret = -EINVAL;
 749
 750         if (copy_from_user(&cmd, buf, sizeof cmd))
 751                 return -EFAULT;
 752
 753         down(&ib_uverbs_idr_mutex);
 754         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 755         if (cq && cq->uobject->context == file->ucontext) {
 756                 ib_req_notify_cq(cq, cmd.solicited_only ?
 757                                         IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 758                 ret = in_len;
 759         }
 760         up(&ib_uverbs_idr_mutex);
 761
 762         return ret;
 763 }
 764
 765 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 766                              const char __user *buf, int in_len,
 767                              int out_len)
 768 {
 769         struct ib_uverbs_destroy_cq      cmd;
 770         struct ib_uverbs_destroy_cq_resp resp;
 771         struct ib_cq                    *cq;
 772         struct ib_ucq_object            *uobj;
 773         struct ib_uverbs_event_file     *ev_file;
 774         u64                              user_handle;
 775         int                              ret = -EINVAL;
 776
 777         if (copy_from_user(&cmd, buf, sizeof cmd))
 778                 return -EFAULT;
 779
 780         memset(&resp, 0, sizeof resp);
 781
 782         down(&ib_uverbs_idr_mutex);
 783
 784         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 785         if (!cq || cq->uobject->context != file->ucontext)
 786                 goto out;
 787
 788         user_handle = cq->uobject->user_handle;
 789         uobj        = container_of(cq->uobject, struct ib_ucq_object, uobject);
 790         ev_file     = cq->cq_context;
 791
 792         ret = ib_destroy_cq(cq);
 793         if (ret)
 794                 goto out;
 795
 796         idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
 797
 798         down(&file->mutex);
 799         list_del(&uobj->uobject.list);
 800         up(&file->mutex);
 801
 802         ib_uverbs_release_ucq(file, ev_file, uobj);
 803
 804         resp.comp_events_reported  = uobj->comp_events_reported;
 805         resp.async_events_reported = uobj->async_events_reported;
 806
 807         kfree(uobj);
 808
 809         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 810                          &resp, sizeof resp))
 811                 ret = -EFAULT;
 812
 813 out:
 814         up(&ib_uverbs_idr_mutex);
 815
 816         return ret ? ret : in_len;
 817 }
 818
 819 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 820                             const char __user *buf, int in_len,
 821                             int out_len)
 822 {
 823         struct ib_uverbs_create_qp      cmd;
 824         struct ib_uverbs_create_qp_resp resp;
 825         struct ib_udata                 udata;
 826         struct ib_uqp_object           *uobj;
 827         struct ib_pd                   *pd;
 828         struct ib_cq                   *scq, *rcq;
 829         struct ib_srq                  *srq;
 830         struct ib_qp                   *qp;
 831         struct ib_qp_init_attr          attr;
 832         int ret;
 833
 834         if (out_len < sizeof resp)
 835                 return -ENOSPC;
 836
 837         if (copy_from_user(&cmd, buf, sizeof cmd))
 838                 return -EFAULT;
 839
 840         INIT_UDATA(&udata, buf + sizeof cmd,
 841                    (unsigned long) cmd.response + sizeof resp,
 842                    in_len - sizeof cmd, out_len - sizeof resp);
 843
 844         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 845         if (!uobj)
 846                 return -ENOMEM;
 847
 848         down(&ib_uverbs_idr_mutex);
 849
 850         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
 851         scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
 852         rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
 853         srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
 854
 855         if (!pd  || pd->uobject->context  != file->ucontext ||
 856             !scq || scq->uobject->context != file->ucontext ||
 857             !rcq || rcq->uobject->context != file->ucontext ||
 858             (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
 859                 ret = -EINVAL;
 860                 goto err_up;
 861         }
 862
 863         attr.event_handler = ib_uverbs_qp_event_handler;
 864         attr.qp_context    = file;
 865         attr.send_cq       = scq;
 866         attr.recv_cq       = rcq;
 867         attr.srq           = srq;
 868         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
 869         attr.qp_type       = cmd.qp_type;
 870
 871         attr.cap.max_send_wr     = cmd.max_send_wr;
 872         attr.cap.max_recv_wr     = cmd.max_recv_wr;
 873         attr.cap.max_send_sge    = cmd.max_send_sge;
 874         attr.cap.max_recv_sge    = cmd.max_recv_sge;
 875         attr.cap.max_inline_data = cmd.max_inline_data;
 876
 877         uobj->uevent.uobject.user_handle = cmd.user_handle;
 878         uobj->uevent.uobject.context     = file->ucontext;
 879         uobj->uevent.events_reported     = 0;
 880         INIT_LIST_HEAD(&uobj->uevent.event_list);
 881         INIT_LIST_HEAD(&uobj->mcast_list);
 882
 883         qp = pd->device->create_qp(pd, &attr, &udata);
 884         if (IS_ERR(qp)) {
 885                 ret = PTR_ERR(qp);
 886                 goto err_up;
 887         }
 888
 889         qp->device        = pd->device;
 890         qp->pd            = pd;
 891         qp->send_cq       = attr.send_cq;
 892         qp->recv_cq       = attr.recv_cq;
 893         qp->srq           = attr.srq;
 894         qp->uobject       = &uobj->uevent.uobject;
 895         qp->event_handler = attr.event_handler;
 896         qp->qp_context    = attr.qp_context;
 897         qp->qp_type       = attr.qp_type;
 898         atomic_inc(&pd->usecnt);
 899         atomic_inc(&attr.send_cq->usecnt);
 900         atomic_inc(&attr.recv_cq->usecnt);
 901         if (attr.srq)
 902                 atomic_inc(&attr.srq->usecnt);
 903
 904         memset(&resp, 0, sizeof resp);
 905         resp.qpn = qp->qp_num;
 906
 907 retry:
 908         if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
 909                 ret = -ENOMEM;
 910                 goto err_destroy;
 911         }
 912
 913         ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uevent.uobject.id);
 914
 915         if (ret == -EAGAIN)
 916                 goto retry;
 917         if (ret)
 918                 goto err_destroy;
 919
 920         resp.qp_handle       = uobj->uevent.uobject.id;
 921         resp.max_recv_sge    = attr.cap.max_recv_sge;
 922         resp.max_send_sge    = attr.cap.max_send_sge;
 923         resp.max_recv_wr     = attr.cap.max_recv_wr;
 924         resp.max_send_wr     = attr.cap.max_send_wr;
 925         resp.max_inline_data = attr.cap.max_inline_data;
 926
 927         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 928                          &resp, sizeof resp)) {
 929                 ret = -EFAULT;
 930                 goto err_idr;
 931         }
 932
 933         down(&file->mutex);
 934         list_add_tail(&uobj->uevent.uobject.list, &file->ucontext->qp_list);
 935         up(&file->mutex);
 936
 937         up(&ib_uverbs_idr_mutex);
 938
 939         return in_len;
 940
 941 err_idr:
 942         idr_remove(&ib_uverbs_qp_idr, uobj->uevent.uobject.id);
 943
 944 err_destroy:
 945         ib_destroy_qp(qp);
 946         atomic_dec(&pd->usecnt);
 947         atomic_dec(&attr.send_cq->usecnt);
 948         atomic_dec(&attr.recv_cq->usecnt);
 949         if (attr.srq)
 950                 atomic_dec(&attr.srq->usecnt);
 951
 952 err_up:
 953         up(&ib_uverbs_idr_mutex);
 954
 955         kfree(uobj);
 956         return ret;
 957 }
 958
 959 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
 960                             const char __user *buf, int in_len,
 961                             int out_len)
 962 {
 963         struct ib_uverbs_modify_qp cmd;
 964         struct ib_qp              *qp;
 965         struct ib_qp_attr         *attr;
 966         int                        ret;
 967
 968         if (copy_from_user(&cmd, buf, sizeof cmd))
 969                 return -EFAULT;
 970
 971         attr = kmalloc(sizeof *attr, GFP_KERNEL);
 972         if (!attr)
 973                 return -ENOMEM;
 974
 975         down(&ib_uverbs_idr_mutex);
 976
 977         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
 978         if (!qp || qp->uobject->context != file->ucontext) {
 979                 ret = -EINVAL;
 980                 goto out;
 981         }
 982
 983         attr->qp_state            = cmd.qp_state;
 984         attr->cur_qp_state        = cmd.cur_qp_state;
 985         attr->path_mtu            = cmd.path_mtu;
 986         attr->path_mig_state      = cmd.path_mig_state;
 987         attr->qkey                = cmd.qkey;
 988         attr->rq_psn              = cmd.rq_psn;
 989         attr->sq_psn              = cmd.sq_psn;
 990         attr->dest_qp_num         = cmd.dest_qp_num;
 991         attr->qp_access_flags     = cmd.qp_access_flags;
 992         attr->pkey_index          = cmd.pkey_index;
 993         attr->alt_pkey_index      = cmd.pkey_index;
 994         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
 995         attr->max_rd_atomic       = cmd.max_rd_atomic;
 996         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
 997         attr->min_rnr_timer       = cmd.min_rnr_timer;
 998         attr->port_num            = cmd.port_num;
 999         attr->timeout             = cmd.timeout;
1000         attr->retry_cnt           = cmd.retry_cnt;
1001         attr->rnr_retry           = cmd.rnr_retry;
1002         attr->alt_port_num        = cmd.alt_port_num;
1003         attr->alt_timeout         = cmd.alt_timeout;
1004
1005         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1006         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1007         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1008         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1009         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1010         attr->ah_attr.dlid                  = cmd.dest.dlid;
1011         attr->ah_attr.sl                    = cmd.dest.sl;
1012         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1013         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1014         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1015         attr->ah_attr.port_num              = cmd.dest.port_num;
1016
1017         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1018         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1019         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1020         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1021         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1022         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1023         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1024         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1025         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1026         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1027         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1028
1029         ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1030         if (ret)
1031                 goto out;
1032
1033         ret = in_len;
1034
1035 out:
1036         up(&ib_uverbs_idr_mutex);
1037         kfree(attr);
1038
1039         return ret;
1040 }
1041
1042 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1043                              const char __user *buf, int in_len,
1044                              int out_len)
1045 {
1046         struct ib_uverbs_destroy_qp      cmd;
1047         struct ib_uverbs_destroy_qp_resp resp;
1048         struct ib_qp                    *qp;
1049         struct ib_uqp_object            *uobj;
1050         int                              ret = -EINVAL;
1051
1052         if (copy_from_user(&cmd, buf, sizeof cmd))
1053                 return -EFAULT;
1054
1055         memset(&resp, 0, sizeof resp);
1056
1057         down(&ib_uverbs_idr_mutex);
1058
1059         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1060         if (!qp || qp->uobject->context != file->ucontext)
1061                 goto out;
1062
1063         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1064
1065         if (!list_empty(&uobj->mcast_list)) {
1066                 ret = -EBUSY;
1067                 goto out;
1068         }
1069
1070         ret = ib_destroy_qp(qp);
1071         if (ret)
1072                 goto out;
1073
1074         idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
1075
1076         down(&file->mutex);
1077         list_del(&uobj->uevent.uobject.list);
1078         up(&file->mutex);
1079
1080         ib_uverbs_release_uevent(file, &uobj->uevent);
1081
1082         resp.events_reported = uobj->uevent.events_reported;
1083
1084         kfree(uobj);
1085
1086         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1087                          &resp, sizeof resp))
1088                 ret = -EFAULT;
1089
1090 out:
1091         up(&ib_uverbs_idr_mutex);
1092
1093         return ret ? ret : in_len;
1094 }
1095
1096 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1097                             const char __user *buf, int in_len,
1098                             int out_len)
1099 {
1100         struct ib_uverbs_post_send      cmd;
1101         struct ib_uverbs_post_send_resp resp;
1102         struct ib_uverbs_send_wr       *user_wr;
1103         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1104         struct ib_qp                   *qp;
1105         int                             i, sg_ind;
1106         ssize_t                         ret = -EINVAL;
1107
1108         if (copy_from_user(&cmd, buf, sizeof cmd))
1109                 return -EFAULT;
1110
1111         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1112             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1113                 return -EINVAL;
1114
1115         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1116                 return -EINVAL;
1117
1118         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1119         if (!user_wr)
1120                 return -ENOMEM;
1121
1122         down(&ib_uverbs_idr_mutex);
1123
1124         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1125         if (!qp || qp->uobject->context != file->ucontext)
1126                 goto out;
1127
1128         sg_ind = 0;
1129         last = NULL;
1130         for (i = 0; i < cmd.wr_count; ++i) {
1131                 if (copy_from_user(user_wr,
1132                                    buf + sizeof cmd + i * cmd.wqe_size,
1133                                    cmd.wqe_size)) {
1134                         ret = -EFAULT;
1135                         goto out;
1136                 }
1137
1138                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1139                         ret = -EINVAL;
1140                         goto out;
1141                 }
1142
1143                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1144                                user_wr->num_sge * sizeof (struct ib_sge),
1145                                GFP_KERNEL);
1146                 if (!next) {
1147                         ret = -ENOMEM;
1148                         goto out;
1149                 }
1150
1151                 if (!last)
1152                         wr = next;
1153                 else
1154                         last->next = next;
1155                 last = next;
1156
1157                 next->next       = NULL;
1158                 next->wr_id      = user_wr->wr_id;
1159                 next->num_sge    = user_wr->num_sge;
1160                 next->opcode     = user_wr->opcode;
1161                 next->send_flags = user_wr->send_flags;
1162                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1163
1164                 if (qp->qp_type == IB_QPT_UD) {
1165                         next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr,
1166                                                   user_wr->wr.ud.ah);
1167                         if (!next->wr.ud.ah) {
1168                                 ret = -EINVAL;
1169                                 goto out;
1170                         }
1171                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1172                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1173                 } else {
1174                         switch (next->opcode) {
1175                         case IB_WR_RDMA_WRITE:
1176                         case IB_WR_RDMA_WRITE_WITH_IMM:
1177                         case IB_WR_RDMA_READ:
1178                                 next->wr.rdma.remote_addr =
1179                                         user_wr->wr.rdma.remote_addr;
1180                                 next->wr.rdma.rkey        =
1181                                         user_wr->wr.rdma.rkey;
1182                                 break;
1183                         case IB_WR_ATOMIC_CMP_AND_SWP:
1184                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1185                                 next->wr.atomic.remote_addr =
1186                                         user_wr->wr.atomic.remote_addr;
1187                                 next->wr.atomic.compare_add =
1188                                         user_wr->wr.atomic.compare_add;
1189                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1190                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1191                                 break;
1192                         default:
1193                                 break;
1194                         }
1195                 }
1196
1197                 if (next->num_sge) {
1198                         next->sg_list = (void *) next +
1199                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1200                         if (copy_from_user(next->sg_list,
1201                                            buf + sizeof cmd +
1202                                            cmd.wr_count * cmd.wqe_size +
1203                                            sg_ind * sizeof (struct ib_sge),
1204                                            next->num_sge * sizeof (struct ib_sge))) {
1205                                 ret = -EFAULT;
1206                                 goto out;
1207                         }
1208                         sg_ind += next->num_sge;
1209                 } else
1210                         next->sg_list = NULL;
1211         }
1212
1213         resp.bad_wr = 0;
1214         ret = qp->device->post_send(qp, wr, &bad_wr);
1215         if (ret)
1216                 for (next = wr; next; next = next->next) {
1217                         ++resp.bad_wr;
1218                         if (next == bad_wr)
1219                                 break;
1220                 }
1221
1222         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1223                          &resp, sizeof resp))
1224                 ret = -EFAULT;
1225
1226 out:
1227         up(&ib_uverbs_idr_mutex);
1228
1229         while (wr) {
1230                 next = wr->next;
1231                 kfree(wr);
1232                 wr = next;
1233         }
1234
1235         kfree(user_wr);
1236
1237         return ret ? ret : in_len;
1238 }
1239
1240 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1241                                                     int in_len,
1242                                                     u32 wr_count,
1243                                                     u32 sge_count,
1244                                                     u32 wqe_size)
1245 {
1246         struct ib_uverbs_recv_wr *user_wr;
1247         struct ib_recv_wr        *wr = NULL, *last, *next;
1248         int                       sg_ind;
1249         int                       i;
1250         int                       ret;
1251
1252         if (in_len < wqe_size * wr_count +
1253             sge_count * sizeof (struct ib_uverbs_sge))
1254                 return ERR_PTR(-EINVAL);
1255
1256         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1257                 return ERR_PTR(-EINVAL);
1258
1259         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1260         if (!user_wr)
1261                 return ERR_PTR(-ENOMEM);
1262
1263         sg_ind = 0;
1264         last = NULL;
1265         for (i = 0; i < wr_count; ++i) {
1266                 if (copy_from_user(user_wr, buf + i * wqe_size,
1267                                    wqe_size)) {
1268                         ret = -EFAULT;
1269                         goto err;
1270                 }
1271
1272                 if (user_wr->num_sge + sg_ind > sge_count) {
1273                         ret = -EINVAL;
1274                         goto err;
1275                 }
1276
1277                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1278                                user_wr->num_sge * sizeof (struct ib_sge),
1279                                GFP_KERNEL);
1280                 if (!next) {
1281                         ret = -ENOMEM;
1282                         goto err;
1283                 }
1284
1285                 if (!last)
1286                         wr = next;
1287                 else
1288                         last->next = next;
1289                 last = next;
1290
1291                 next->next       = NULL;
1292                 next->wr_id      = user_wr->wr_id;
1293                 next->num_sge    = user_wr->num_sge;
1294
1295                 if (next->num_sge) {
1296                         next->sg_list = (void *) next +
1297                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1298                         if (copy_from_user(next->sg_list,
1299                                            buf + wr_count * wqe_size +
1300                                            sg_ind * sizeof (struct ib_sge),
1301                                            next->num_sge * sizeof (struct ib_sge))) {
1302                                 ret = -EFAULT;
1303                                 goto err;
1304                         }
1305                         sg_ind += next->num_sge;
1306                 } else
1307                         next->sg_list = NULL;
1308         }
1309
1310         kfree(user_wr);
1311         return wr;
1312
1313 err:
1314         kfree(user_wr);
1315
1316         while (wr) {
1317                 next = wr->next;
1318                 kfree(wr);
1319                 wr = next;
1320         }
1321
1322         return ERR_PTR(ret);
1323 }
1324
1325 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1326                             const char __user *buf, int in_len,
1327                             int out_len)
1328 {
1329         struct ib_uverbs_post_recv      cmd;
1330         struct ib_uverbs_post_recv_resp resp;
1331         struct ib_recv_wr              *wr, *next, *bad_wr;
1332         struct ib_qp                   *qp;
1333         ssize_t                         ret = -EINVAL;
1334
1335         if (copy_from_user(&cmd, buf, sizeof cmd))
1336                 return -EFAULT;
1337
1338         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1339                                        in_len - sizeof cmd, cmd.wr_count,
1340                                        cmd.sge_count, cmd.wqe_size);
1341         if (IS_ERR(wr))
1342                 return PTR_ERR(wr);
1343
1344         down(&ib_uverbs_idr_mutex);
1345
1346         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1347         if (!qp || qp->uobject->context != file->ucontext)
1348                 goto out;
1349
1350         resp.bad_wr = 0;
1351         ret = qp->device->post_recv(qp, wr, &bad_wr);
1352         if (ret)
1353                 for (next = wr; next; next = next->next) {
1354                         ++resp.bad_wr;
1355                         if (next == bad_wr)
1356                                 break;
1357                 }
1358
1359
1360         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1361                          &resp, sizeof resp))
1362                 ret = -EFAULT;
1363
1364 out:
1365         up(&ib_uverbs_idr_mutex);
1366
1367         while (wr) {
1368                 next = wr->next;
1369                 kfree(wr);
1370                 wr = next;
1371         }
1372
1373         return ret ? ret : in_len;
1374 }
1375
1376 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1377                             const char __user *buf, int in_len,
1378                             int out_len)
1379 {
1380         struct ib_uverbs_post_srq_recv      cmd;
1381         struct ib_uverbs_post_srq_recv_resp resp;
1382         struct ib_recv_wr                  *wr, *next, *bad_wr;
1383         struct ib_srq                      *srq;
1384         ssize_t                             ret = -EINVAL;
1385
1386         if (copy_from_user(&cmd, buf, sizeof cmd))
1387                 return -EFAULT;
1388
1389         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1390                                        in_len - sizeof cmd, cmd.wr_count,
1391                                        cmd.sge_count, cmd.wqe_size);
1392         if (IS_ERR(wr))
1393                 return PTR_ERR(wr);
1394
1395         down(&ib_uverbs_idr_mutex);
1396
1397         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1398         if (!srq || srq->uobject->context != file->ucontext)
1399                 goto out;
1400
1401         resp.bad_wr = 0;
1402         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1403         if (ret)
1404                 for (next = wr; next; next = next->next) {
1405                         ++resp.bad_wr;
1406                         if (next == bad_wr)
1407                                 break;
1408                 }
1409
1410
1411         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1412                          &resp, sizeof resp))
1413                 ret = -EFAULT;
1414
1415 out:
1416         up(&ib_uverbs_idr_mutex);
1417
1418         while (wr) {
1419                 next = wr->next;
1420                 kfree(wr);
1421                 wr = next;
1422         }
1423
1424         return ret ? ret : in_len;
1425 }
1426
1427 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1428                             const char __user *buf, int in_len,
1429                             int out_len)
1430 {
1431         struct ib_uverbs_create_ah       cmd;
1432         struct ib_uverbs_create_ah_resp  resp;
1433         struct ib_uobject               *uobj;
1434         struct ib_pd                    *pd;
1435         struct ib_ah                    *ah;
1436         struct ib_ah_attr               attr;
1437         int ret;
1438
1439         if (out_len < sizeof resp)
1440                 return -ENOSPC;
1441
1442         if (copy_from_user(&cmd, buf, sizeof cmd))
1443                 return -EFAULT;
1444
1445         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1446         if (!uobj)
1447                 return -ENOMEM;
1448
1449         down(&ib_uverbs_idr_mutex);
1450
1451         pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1452         if (!pd || pd->uobject->context != file->ucontext) {
1453                 ret = -EINVAL;
1454                 goto err_up;
1455         }
1456
1457         uobj->user_handle = cmd.user_handle;
1458         uobj->context     = file->ucontext;
1459
1460         attr.dlid              = cmd.attr.dlid;
1461         attr.sl                = cmd.attr.sl;
1462         attr.src_path_bits     = cmd.attr.src_path_bits;
1463         attr.static_rate       = cmd.attr.static_rate;
1464         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1465         attr.port_num          = cmd.attr.port_num;
1466         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1467         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1468         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1469         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1470         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1471
1472         ah = ib_create_ah(pd, &attr);
1473         if (IS_ERR(ah)) {
1474                 ret = PTR_ERR(ah);
1475                 goto err_up;
1476         }
1477
1478         ah->uobject = uobj;
1479
1480 retry:
1481         if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) {
1482                 ret = -ENOMEM;
1483                 goto err_destroy;
1484         }
1485
1486         ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id);
1487
1488         if (ret == -EAGAIN)
1489                 goto retry;
1490         if (ret)
1491                 goto err_destroy;
1492
1493         resp.ah_handle = uobj->id;
1494
1495         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1496                          &resp, sizeof resp)) {
1497                 ret = -EFAULT;
1498                 goto err_idr;
1499         }
1500
1501         down(&file->mutex);
1502         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1503         up(&file->mutex);
1504
1505         up(&ib_uverbs_idr_mutex);
1506
1507         return in_len;
1508
1509 err_idr:
1510         idr_remove(&ib_uverbs_ah_idr, uobj->id);
1511
1512 err_destroy:
1513         ib_destroy_ah(ah);
1514
1515 err_up:
1516         up(&ib_uverbs_idr_mutex);
1517
1518         kfree(uobj);
1519         return ret;
1520 }
1521
1522 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1523                              const char __user *buf, int in_len, int out_len)
1524 {
1525         struct ib_uverbs_destroy_ah cmd;
1526         struct ib_ah               *ah;
1527         struct ib_uobject          *uobj;
1528         int                         ret = -EINVAL;
1529
1530         if (copy_from_user(&cmd, buf, sizeof cmd))
1531                 return -EFAULT;
1532
1533         down(&ib_uverbs_idr_mutex);
1534
1535         ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle);
1536         if (!ah || ah->uobject->context != file->ucontext)
1537                 goto out;
1538
1539         uobj = ah->uobject;
1540
1541         ret = ib_destroy_ah(ah);
1542         if (ret)
1543                 goto out;
1544
1545         idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle);
1546
1547         down(&file->mutex);
1548         list_del(&uobj->list);
1549         up(&file->mutex);
1550
1551         kfree(uobj);
1552
1553 out:
1554         up(&ib_uverbs_idr_mutex);
1555
1556         return ret ? ret : in_len;
1557 }
1558
1559 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1560                                const char __user *buf, int in_len,
1561                                int out_len)
1562 {
1563         struct ib_uverbs_attach_mcast cmd;
1564         struct ib_qp                 *qp;
1565         struct ib_uqp_object         *uobj;
1566         struct ib_uverbs_mcast_entry *mcast;
1567         int                           ret = -EINVAL;
1568
1569         if (copy_from_user(&cmd, buf, sizeof cmd))
1570                 return -EFAULT;
1571
1572         down(&ib_uverbs_idr_mutex);
1573
1574         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1575         if (!qp || qp->uobject->context != file->ucontext)
1576                 goto out;
1577
1578         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1579
1580         list_for_each_entry(mcast, &uobj->mcast_list, list)
1581                 if (cmd.mlid == mcast->lid &&
1582                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1583                         ret = 0;
1584                         goto out;
1585                 }
1586
1587         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1588         if (!mcast) {
1589                 ret = -ENOMEM;
1590                 goto out;
1591         }
1592
1593         mcast->lid = cmd.mlid;
1594         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1595
1596         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1597         if (!ret) {
1598                 uobj = container_of(qp->uobject, struct ib_uqp_object,
1599                                     uevent.uobject);
1600                 list_add_tail(&mcast->list, &uobj->mcast_list);
1601         } else
1602                 kfree(mcast);
1603
1604 out:
1605         up(&ib_uverbs_idr_mutex);
1606
1607         return ret ? ret : in_len;
1608 }
1609
1610 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1611                                const char __user *buf, int in_len,
1612                                int out_len)
1613 {
1614         struct ib_uverbs_detach_mcast cmd;
1615         struct ib_uqp_object         *uobj;
1616         struct ib_qp                 *qp;
1617         struct ib_uverbs_mcast_entry *mcast;
1618         int                           ret = -EINVAL;
1619
1620         if (copy_from_user(&cmd, buf, sizeof cmd))
1621                 return -EFAULT;
1622
1623         down(&ib_uverbs_idr_mutex);
1624
1625         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1626         if (!qp || qp->uobject->context != file->ucontext)
1627                 goto out;
1628
1629         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1630         if (ret)
1631                 goto out;
1632
1633         uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1634
1635         list_for_each_entry(mcast, &uobj->mcast_list, list)
1636                 if (cmd.mlid == mcast->lid &&
1637                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1638                         list_del(&mcast->list);
1639                         kfree(mcast);
1640                         break;
1641                 }
1642
1643 out:
1644         up(&ib_uverbs_idr_mutex);
1645
1646         return ret ? ret : in_len;
1647 }
1648
1649 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1650                              const char __user *buf, int in_len,
1651                              int out_len)
1652 {
1653         struct ib_uverbs_create_srq      cmd;
1654         struct ib_uverbs_create_srq_resp resp;
1655         struct ib_udata                  udata;
1656         struct ib_uevent_object         *uobj;
1657         struct ib_pd                    *pd;
1658         struct ib_srq                   *srq;
1659         struct ib_srq_init_attr          attr;
1660         int ret;
1661
1662         if (out_len < sizeof resp)
1663                 return -ENOSPC;
1664
1665         if (copy_from_user(&cmd, buf, sizeof cmd))
1666                 return -EFAULT;
1667
1668         INIT_UDATA(&udata, buf + sizeof cmd,
1669                    (unsigned long) cmd.response + sizeof resp,
1670                    in_len - sizeof cmd, out_len - sizeof resp);
1671
1672         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1673         if (!uobj)
1674                 return -ENOMEM;
1675
1676         down(&ib_uverbs_idr_mutex);
1677
1678         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1679
1680         if (!pd || pd->uobject->context != file->ucontext) {
1681                 ret = -EINVAL;
1682                 goto err_up;
1683         }
1684
1685         attr.event_handler  = ib_uverbs_srq_event_handler;
1686         attr.srq_context    = file;
1687         attr.attr.max_wr    = cmd.max_wr;
1688         attr.attr.max_sge   = cmd.max_sge;
1689         attr.attr.srq_limit = cmd.srq_limit;
1690
1691         uobj->uobject.user_handle = cmd.user_handle;
1692         uobj->uobject.context     = file->ucontext;
1693         uobj->events_reported     = 0;
1694         INIT_LIST_HEAD(&uobj->event_list);
1695
1696         srq = pd->device->create_srq(pd, &attr, &udata);
1697         if (IS_ERR(srq)) {
1698                 ret = PTR_ERR(srq);
1699                 goto err_up;
1700         }
1701
1702         srq->device        = pd->device;
1703         srq->pd            = pd;
1704         srq->uobject       = &uobj->uobject;
1705         srq->event_handler = attr.event_handler;
1706         srq->srq_context   = attr.srq_context;
1707         atomic_inc(&pd->usecnt);
1708         atomic_set(&srq->usecnt, 0);
1709
1710         memset(&resp, 0, sizeof resp);
1711
1712 retry:
1713         if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
1714                 ret = -ENOMEM;
1715                 goto err_destroy;
1716         }
1717
1718         ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id);
1719
1720         if (ret == -EAGAIN)
1721                 goto retry;
1722         if (ret)
1723                 goto err_destroy;
1724
1725         resp.srq_handle = uobj->uobject.id;
1726
1727         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1728                          &resp, sizeof resp)) {
1729                 ret = -EFAULT;
1730                 goto err_idr;
1731         }
1732
1733         down(&file->mutex);
1734         list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list);
1735         up(&file->mutex);
1736
1737         up(&ib_uverbs_idr_mutex);
1738
1739         return in_len;
1740
1741 err_idr:
1742         idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id);
1743
1744 err_destroy:
1745         ib_destroy_srq(srq);
1746         atomic_dec(&pd->usecnt);
1747
1748 err_up:
1749         up(&ib_uverbs_idr_mutex);
1750
1751         kfree(uobj);
1752         return ret;
1753 }
1754
1755 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
1756                              const char __user *buf, int in_len,
1757                              int out_len)
1758 {
1759         struct ib_uverbs_modify_srq cmd;
1760         struct ib_srq              *srq;
1761         struct ib_srq_attr          attr;
1762         int                         ret;
1763
1764         if (copy_from_user(&cmd, buf, sizeof cmd))
1765                 return -EFAULT;
1766
1767         down(&ib_uverbs_idr_mutex);
1768
1769         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1770         if (!srq || srq->uobject->context != file->ucontext) {
1771                 ret = -EINVAL;
1772                 goto out;
1773         }
1774
1775         attr.max_wr    = cmd.max_wr;
1776         attr.srq_limit = cmd.srq_limit;
1777
1778         ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
1779
1780 out:
1781         up(&ib_uverbs_idr_mutex);
1782
1783         return ret ? ret : in_len;
1784 }
1785
1786 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
1787                               const char __user *buf, int in_len,
1788                               int out_len)
1789 {
1790         struct ib_uverbs_destroy_srq      cmd;
1791         struct ib_uverbs_destroy_srq_resp resp;
1792         struct ib_srq                    *srq;
1793         struct ib_uevent_object          *uobj;
1794         int                               ret = -EINVAL;
1795
1796         if (copy_from_user(&cmd, buf, sizeof cmd))
1797                 return -EFAULT;
1798
1799         down(&ib_uverbs_idr_mutex);
1800
1801         memset(&resp, 0, sizeof resp);
1802
1803         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1804         if (!srq || srq->uobject->context != file->ucontext)
1805                 goto out;
1806
1807         uobj = container_of(srq->uobject, struct ib_uevent_object, uobject);
1808
1809         ret = ib_destroy_srq(srq);
1810         if (ret)
1811                 goto out;
1812
1813         idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
1814
1815         down(&file->mutex);
1816         list_del(&uobj->uobject.list);
1817         up(&file->mutex);
1818
1819         ib_uverbs_release_uevent(file, uobj);
1820
1821         resp.events_reported = uobj->events_reported;
1822
1823         kfree(uobj);
1824
1825         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1826                          &resp, sizeof resp))
1827                 ret = -EFAULT;
1828
1829 out:
1830         up(&ib_uverbs_idr_mutex);
1831
1832         return ret ? ret : in_len;
1833 }