git.oblomov.eu Git - linux-2.6/blob - 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
 493 err_up:
 494         up(&ib_uverbs_idr_mutex);
 495
 496         ib_umem_release(file->device->ib_dev, &obj->umem);
 497
 498 err_free:
 499         kfree(obj);
 500         return ret;
 501 }
 502
 503 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 504                            const char __user *buf, int in_len,
 505                            int out_len)
 506 {
 507         struct ib_uverbs_dereg_mr cmd;
 508         struct ib_mr             *mr;
 509         struct ib_umem_object    *memobj;
 510         int                       ret = -EINVAL;
 511
 512         if (copy_from_user(&cmd, buf, sizeof cmd))
 513                 return -EFAULT;
 514
 515         down(&ib_uverbs_idr_mutex);
 516
 517         mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
 518         if (!mr || mr->uobject->context != file->ucontext)
 519                 goto out;
 520
 521         memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
 522
 523         ret = ib_dereg_mr(mr);
 524         if (ret)
 525                 goto out;
 526
 527         idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
 528
 529         down(&file->mutex);
 530         list_del(&memobj->uobject.list);
 531         up(&file->mutex);
 532
 533         ib_umem_release(file->device->ib_dev, &memobj->umem);
 534         kfree(memobj);
 535
 536 out:
 537         up(&ib_uverbs_idr_mutex);
 538
 539         return ret ? ret : in_len;
 540 }
 541
 542 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 543                                       const char __user *buf, int in_len,
 544                                       int out_len)
 545 {
 546         struct ib_uverbs_create_comp_channel       cmd;
 547         struct ib_uverbs_create_comp_channel_resp  resp;
 548         struct file                               *filp;
 549
 550         if (out_len < sizeof resp)
 551                 return -ENOSPC;
 552
 553         if (copy_from_user(&cmd, buf, sizeof cmd))
 554                 return -EFAULT;
 555
 556         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 557         if (IS_ERR(filp))
 558                 return PTR_ERR(filp);
 559
 560         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 561                          &resp, sizeof resp)) {
 562                 put_unused_fd(resp.fd);
 563                 fput(filp);
 564                 return -EFAULT;
 565         }
 566
 567         fd_install(resp.fd, filp);
 568         return in_len;
 569 }
 570
 571 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 572                             const char __user *buf, int in_len,
 573                             int out_len)
 574 {
 575         struct ib_uverbs_create_cq      cmd;
 576         struct ib_uverbs_create_cq_resp resp;
 577         struct ib_udata                 udata;
 578         struct ib_ucq_object           *uobj;
 579         struct ib_uverbs_event_file    *ev_file = NULL;
 580         struct ib_cq                   *cq;
 581         int                             ret;
 582
 583         if (out_len < sizeof resp)
 584                 return -ENOSPC;
 585
 586         if (copy_from_user(&cmd, buf, sizeof cmd))
 587                 return -EFAULT;
 588
 589         INIT_UDATA(&udata, buf + sizeof cmd,
 590                    (unsigned long) cmd.response + sizeof resp,
 591                    in_len - sizeof cmd, out_len - sizeof resp);
 592
 593         if (cmd.comp_vector >= file->device->num_comp_vectors)
 594                 return -EINVAL;
 595
 596         if (cmd.comp_channel >= 0)
 597                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 598
 599         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 600         if (!uobj)
 601                 return -ENOMEM;
 602
 603         uobj->uobject.user_handle   = cmd.user_handle;
 604         uobj->uobject.context       = file->ucontext;
 605         uobj->uverbs_file           = file;
 606         uobj->comp_events_reported  = 0;
 607         uobj->async_events_reported = 0;
 608         INIT_LIST_HEAD(&uobj->comp_list);
 609         INIT_LIST_HEAD(&uobj->async_list);
 610
 611         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 612                                              file->ucontext, &udata);
 613         if (IS_ERR(cq)) {
 614                 ret = PTR_ERR(cq);
 615                 goto err;
 616         }
 617
 618         cq->device        = file->device->ib_dev;
 619         cq->uobject       = &uobj->uobject;
 620         cq->comp_handler  = ib_uverbs_comp_handler;
 621         cq->event_handler = ib_uverbs_cq_event_handler;
 622         cq->cq_context    = ev_file;
 623         atomic_set(&cq->usecnt, 0);
 624
 625         down(&ib_uverbs_idr_mutex);
 626
 627 retry:
 628         if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
 629                 ret = -ENOMEM;
 630                 goto err_up;
 631         }
 632
 633         ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);
 634
 635         if (ret == -EAGAIN)
 636                 goto retry;
 637         if (ret)
 638                 goto err_up;
 639
 640         memset(&resp, 0, sizeof resp);
 641         resp.cq_handle = uobj->uobject.id;
 642         resp.cqe       = cq->cqe;
 643
 644         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 645                          &resp, sizeof resp)) {
 646                 ret = -EFAULT;
 647                 goto err_idr;
 648         }
 649
 650         down(&file->mutex);
 651         list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
 652         up(&file->mutex);
 653
 654         up(&ib_uverbs_idr_mutex);
 655
 656         return in_len;
 657
 658 err_idr:
 659         idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);
 660
 661 err_up:
 662         up(&ib_uverbs_idr_mutex);
 663         ib_destroy_cq(cq);
 664
 665 err:
 666         kfree(uobj);
 667         return ret;
 668 }
 669
 670 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 671                           const char __user *buf, int in_len,
 672                           int out_len)
 673 {
 674         struct ib_uverbs_poll_cq       cmd;
 675         struct ib_uverbs_poll_cq_resp *resp;
 676         struct ib_cq                  *cq;
 677         struct ib_wc                  *wc;
 678         int                            ret = 0;
 679         int                            i;
 680         int                            rsize;
 681
 682         if (copy_from_user(&cmd, buf, sizeof cmd))
 683                 return -EFAULT;
 684
 685         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 686         if (!wc)
 687                 return -ENOMEM;
 688
 689         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 690         resp = kmalloc(rsize, GFP_KERNEL);
 691         if (!resp) {
 692                 ret = -ENOMEM;
 693                 goto out_wc;
 694         }
 695
 696         down(&ib_uverbs_idr_mutex);
 697         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 698         if (!cq || cq->uobject->context != file->ucontext) {
 699                 ret = -EINVAL;
 700                 goto out;
 701         }
 702
 703         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 704
 705         for (i = 0; i < resp->count; i++) {
 706                 resp->wc[i].wr_id          = wc[i].wr_id;
 707                 resp->wc[i].status         = wc[i].status;
 708                 resp->wc[i].opcode         = wc[i].opcode;
 709                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 710                 resp->wc[i].byte_len       = wc[i].byte_len;
 711                 resp->wc[i].imm_data       = (__u32 __force) wc[i].imm_data;
 712                 resp->wc[i].qp_num         = wc[i].qp_num;
 713                 resp->wc[i].src_qp         = wc[i].src_qp;
 714                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 715                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 716                 resp->wc[i].slid           = wc[i].slid;
 717                 resp->wc[i].sl             = wc[i].sl;
 718                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 719                 resp->wc[i].port_num       = wc[i].port_num;
 720         }
 721
 722         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 723                 ret = -EFAULT;
 724
 725 out:
 726         up(&ib_uverbs_idr_mutex);
 727         kfree(resp);
 728
 729 out_wc:
 730         kfree(wc);
 731         return ret ? ret : in_len;
 732 }
 733
 734 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 735                                 const char __user *buf, int in_len,
 736                                 int out_len)
 737 {
 738         struct ib_uverbs_req_notify_cq cmd;
 739         struct ib_cq                  *cq;
 740         int                            ret = -EINVAL;
 741
 742         if (copy_from_user(&cmd, buf, sizeof cmd))
 743                 return -EFAULT;
 744
 745         down(&ib_uverbs_idr_mutex);
 746         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 747         if (cq && cq->uobject->context == file->ucontext) {
 748                 ib_req_notify_cq(cq, cmd.solicited_only ?
 749                                         IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 750                 ret = in_len;
 751         }
 752         up(&ib_uverbs_idr_mutex);
 753
 754         return ret;
 755 }
 756
 757 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 758                              const char __user *buf, int in_len,
 759                              int out_len)
 760 {
 761         struct ib_uverbs_destroy_cq      cmd;
 762         struct ib_uverbs_destroy_cq_resp resp;
 763         struct ib_cq                    *cq;
 764         struct ib_ucq_object            *uobj;
 765         struct ib_uverbs_event_file     *ev_file;
 766         u64                              user_handle;
 767         int                              ret = -EINVAL;
 768
 769         if (copy_from_user(&cmd, buf, sizeof cmd))
 770                 return -EFAULT;
 771
 772         memset(&resp, 0, sizeof resp);
 773
 774         down(&ib_uverbs_idr_mutex);
 775
 776         cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
 777         if (!cq || cq->uobject->context != file->ucontext)
 778                 goto out;
 779
 780         user_handle = cq->uobject->user_handle;
 781         uobj        = container_of(cq->uobject, struct ib_ucq_object, uobject);
 782         ev_file     = cq->cq_context;
 783
 784         ret = ib_destroy_cq(cq);
 785         if (ret)
 786                 goto out;
 787
 788         idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
 789
 790         down(&file->mutex);
 791         list_del(&uobj->uobject.list);
 792         up(&file->mutex);
 793
 794         ib_uverbs_release_ucq(file, ev_file, uobj);
 795
 796         resp.comp_events_reported  = uobj->comp_events_reported;
 797         resp.async_events_reported = uobj->async_events_reported;
 798
 799         kfree(uobj);
 800
 801         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 802                          &resp, sizeof resp))
 803                 ret = -EFAULT;
 804
 805 out:
 806         up(&ib_uverbs_idr_mutex);
 807
 808         return ret ? ret : in_len;
 809 }
 810
 811 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 812                             const char __user *buf, int in_len,
 813                             int out_len)
 814 {
 815         struct ib_uverbs_create_qp      cmd;
 816         struct ib_uverbs_create_qp_resp resp;
 817         struct ib_udata                 udata;
 818         struct ib_uevent_object        *uobj;
 819         struct ib_pd                   *pd;
 820         struct ib_cq                   *scq, *rcq;
 821         struct ib_srq                  *srq;
 822         struct ib_qp                   *qp;
 823         struct ib_qp_init_attr          attr;
 824         int ret;
 825
 826         if (out_len < sizeof resp)
 827                 return -ENOSPC;
 828
 829         if (copy_from_user(&cmd, buf, sizeof cmd))
 830                 return -EFAULT;
 831
 832         INIT_UDATA(&udata, buf + sizeof cmd,
 833                    (unsigned long) cmd.response + sizeof resp,
 834                    in_len - sizeof cmd, out_len - sizeof resp);
 835
 836         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 837         if (!uobj)
 838                 return -ENOMEM;
 839
 840         down(&ib_uverbs_idr_mutex);
 841
 842         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
 843         scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
 844         rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
 845         srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
 846
 847         if (!pd  || pd->uobject->context  != file->ucontext ||
 848             !scq || scq->uobject->context != file->ucontext ||
 849             !rcq || rcq->uobject->context != file->ucontext ||
 850             (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
 851                 ret = -EINVAL;
 852                 goto err_up;
 853         }
 854
 855         attr.event_handler = ib_uverbs_qp_event_handler;
 856         attr.qp_context    = file;
 857         attr.send_cq       = scq;
 858         attr.recv_cq       = rcq;
 859         attr.srq           = srq;
 860         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
 861         attr.qp_type       = cmd.qp_type;
 862
 863         attr.cap.max_send_wr     = cmd.max_send_wr;
 864         attr.cap.max_recv_wr     = cmd.max_recv_wr;
 865         attr.cap.max_send_sge    = cmd.max_send_sge;
 866         attr.cap.max_recv_sge    = cmd.max_recv_sge;
 867         attr.cap.max_inline_data = cmd.max_inline_data;
 868
 869         uobj->uobject.user_handle = cmd.user_handle;
 870         uobj->uobject.context     = file->ucontext;
 871         uobj->events_reported     = 0;
 872         INIT_LIST_HEAD(&uobj->event_list);
 873
 874         qp = pd->device->create_qp(pd, &attr, &udata);
 875         if (IS_ERR(qp)) {
 876                 ret = PTR_ERR(qp);
 877                 goto err_up;
 878         }
 879
 880         qp->device        = pd->device;
 881         qp->pd            = pd;
 882         qp->send_cq       = attr.send_cq;
 883         qp->recv_cq       = attr.recv_cq;
 884         qp->srq           = attr.srq;
 885         qp->uobject       = &uobj->uobject;
 886         qp->event_handler = attr.event_handler;
 887         qp->qp_context    = attr.qp_context;
 888         qp->qp_type       = attr.qp_type;
 889         atomic_inc(&pd->usecnt);
 890         atomic_inc(&attr.send_cq->usecnt);
 891         atomic_inc(&attr.recv_cq->usecnt);
 892         if (attr.srq)
 893                 atomic_inc(&attr.srq->usecnt);
 894
 895         memset(&resp, 0, sizeof resp);
 896         resp.qpn = qp->qp_num;
 897
 898 retry:
 899         if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
 900                 ret = -ENOMEM;
 901                 goto err_destroy;
 902         }
 903
 904         ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uobject.id);
 905
 906         if (ret == -EAGAIN)
 907                 goto retry;
 908         if (ret)
 909                 goto err_destroy;
 910
 911         resp.qp_handle       = uobj->uobject.id;
 912         resp.max_recv_sge    = attr.cap.max_recv_sge;
 913         resp.max_send_sge    = attr.cap.max_send_sge;
 914         resp.max_recv_wr     = attr.cap.max_recv_wr;
 915         resp.max_send_wr     = attr.cap.max_send_wr;
 916         resp.max_inline_data = attr.cap.max_inline_data;
 917
 918         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 919                          &resp, sizeof resp)) {
 920                 ret = -EFAULT;
 921                 goto err_idr;
 922         }
 923
 924         down(&file->mutex);
 925         list_add_tail(&uobj->uobject.list, &file->ucontext->qp_list);
 926         up(&file->mutex);
 927
 928         up(&ib_uverbs_idr_mutex);
 929
 930         return in_len;
 931
 932 err_idr:
 933         idr_remove(&ib_uverbs_qp_idr, uobj->uobject.id);
 934
 935 err_destroy:
 936         ib_destroy_qp(qp);
 937
 938 err_up:
 939         up(&ib_uverbs_idr_mutex);
 940
 941         kfree(uobj);
 942         return ret;
 943 }
 944
 945 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
 946                             const char __user *buf, int in_len,
 947                             int out_len)
 948 {
 949         struct ib_uverbs_modify_qp cmd;
 950         struct ib_qp              *qp;
 951         struct ib_qp_attr         *attr;
 952         int                        ret;
 953
 954         if (copy_from_user(&cmd, buf, sizeof cmd))
 955                 return -EFAULT;
 956
 957         attr = kmalloc(sizeof *attr, GFP_KERNEL);
 958         if (!attr)
 959                 return -ENOMEM;
 960
 961         down(&ib_uverbs_idr_mutex);
 962
 963         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
 964         if (!qp || qp->uobject->context != file->ucontext) {
 965                 ret = -EINVAL;
 966                 goto out;
 967         }
 968
 969         attr->qp_state            = cmd.qp_state;
 970         attr->cur_qp_state        = cmd.cur_qp_state;
 971         attr->path_mtu            = cmd.path_mtu;
 972         attr->path_mig_state      = cmd.path_mig_state;
 973         attr->qkey                = cmd.qkey;
 974         attr->rq_psn              = cmd.rq_psn;
 975         attr->sq_psn              = cmd.sq_psn;
 976         attr->dest_qp_num         = cmd.dest_qp_num;
 977         attr->qp_access_flags     = cmd.qp_access_flags;
 978         attr->pkey_index          = cmd.pkey_index;
 979         attr->alt_pkey_index      = cmd.pkey_index;
 980         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
 981         attr->max_rd_atomic       = cmd.max_rd_atomic;
 982         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
 983         attr->min_rnr_timer       = cmd.min_rnr_timer;
 984         attr->port_num            = cmd.port_num;
 985         attr->timeout             = cmd.timeout;
 986         attr->retry_cnt           = cmd.retry_cnt;
 987         attr->rnr_retry           = cmd.rnr_retry;
 988         attr->alt_port_num        = cmd.alt_port_num;
 989         attr->alt_timeout         = cmd.alt_timeout;
 990
 991         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
 992         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
 993         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
 994         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
 995         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
 996         attr->ah_attr.dlid                  = cmd.dest.dlid;
 997         attr->ah_attr.sl                    = cmd.dest.sl;
 998         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
 999         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1000         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1001         attr->ah_attr.port_num              = cmd.dest.port_num;
1002
1003         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1004         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1005         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1006         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1007         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1008         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1009         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1010         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1011         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1012         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1013         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1014
1015         ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1016         if (ret)
1017                 goto out;
1018
1019         ret = in_len;
1020
1021 out:
1022         up(&ib_uverbs_idr_mutex);
1023         kfree(attr);
1024
1025         return ret;
1026 }
1027
1028 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1029                              const char __user *buf, int in_len,
1030                              int out_len)
1031 {
1032         struct ib_uverbs_destroy_qp      cmd;
1033         struct ib_uverbs_destroy_qp_resp resp;
1034         struct ib_qp                    *qp;
1035         struct ib_uevent_object         *uobj;
1036         int                              ret = -EINVAL;
1037
1038         if (copy_from_user(&cmd, buf, sizeof cmd))
1039                 return -EFAULT;
1040
1041         memset(&resp, 0, sizeof resp);
1042
1043         down(&ib_uverbs_idr_mutex);
1044
1045         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1046         if (!qp || qp->uobject->context != file->ucontext)
1047                 goto out;
1048
1049         uobj = container_of(qp->uobject, struct ib_uevent_object, uobject);
1050
1051         ret = ib_destroy_qp(qp);
1052         if (ret)
1053                 goto out;
1054
1055         idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
1056
1057         down(&file->mutex);
1058         list_del(&uobj->uobject.list);
1059         up(&file->mutex);
1060
1061         ib_uverbs_release_uevent(file, uobj);
1062
1063         resp.events_reported = uobj->events_reported;
1064
1065         kfree(uobj);
1066
1067         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1068                          &resp, sizeof resp))
1069                 ret = -EFAULT;
1070
1071 out:
1072         up(&ib_uverbs_idr_mutex);
1073
1074         return ret ? ret : in_len;
1075 }
1076
1077 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1078                             const char __user *buf, int in_len,
1079                             int out_len)
1080 {
1081         struct ib_uverbs_post_send      cmd;
1082         struct ib_uverbs_post_send_resp resp;
1083         struct ib_uverbs_send_wr       *user_wr;
1084         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1085         struct ib_qp                   *qp;
1086         int                             i, sg_ind;
1087         ssize_t                         ret = -EINVAL;
1088
1089         if (copy_from_user(&cmd, buf, sizeof cmd))
1090                 return -EFAULT;
1091
1092         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1093             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1094                 return -EINVAL;
1095
1096         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1097                 return -EINVAL;
1098
1099         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1100         if (!user_wr)
1101                 return -ENOMEM;
1102
1103         down(&ib_uverbs_idr_mutex);
1104
1105         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1106         if (!qp || qp->uobject->context != file->ucontext)
1107                 goto out;
1108
1109         sg_ind = 0;
1110         last = NULL;
1111         for (i = 0; i < cmd.wr_count; ++i) {
1112                 if (copy_from_user(user_wr,
1113                                    buf + sizeof cmd + i * cmd.wqe_size,
1114                                    cmd.wqe_size)) {
1115                         ret = -EFAULT;
1116                         goto out;
1117                 }
1118
1119                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1120                         ret = -EINVAL;
1121                         goto out;
1122                 }
1123
1124                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1125                                user_wr->num_sge * sizeof (struct ib_sge),
1126                                GFP_KERNEL);
1127                 if (!next) {
1128                         ret = -ENOMEM;
1129                         goto out;
1130                 }
1131
1132                 if (!last)
1133                         wr = next;
1134                 else
1135                         last->next = next;
1136                 last = next;
1137
1138                 next->next       = NULL;
1139                 next->wr_id      = user_wr->wr_id;
1140                 next->num_sge    = user_wr->num_sge;
1141                 next->opcode     = user_wr->opcode;
1142                 next->send_flags = user_wr->send_flags;
1143                 next->imm_data   = (__be32 __force) user_wr->imm_data;
1144
1145                 if (qp->qp_type == IB_QPT_UD) {
1146                         next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr,
1147                                                   user_wr->wr.ud.ah);
1148                         if (!next->wr.ud.ah) {
1149                                 ret = -EINVAL;
1150                                 goto out;
1151                         }
1152                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1153                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1154                 } else {
1155                         switch (next->opcode) {
1156                         case IB_WR_RDMA_WRITE:
1157                         case IB_WR_RDMA_WRITE_WITH_IMM:
1158                         case IB_WR_RDMA_READ:
1159                                 next->wr.rdma.remote_addr =
1160                                         user_wr->wr.rdma.remote_addr;
1161                                 next->wr.rdma.rkey        =
1162                                         user_wr->wr.rdma.rkey;
1163                                 break;
1164                         case IB_WR_ATOMIC_CMP_AND_SWP:
1165                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1166                                 next->wr.atomic.remote_addr =
1167                                         user_wr->wr.atomic.remote_addr;
1168                                 next->wr.atomic.compare_add =
1169                                         user_wr->wr.atomic.compare_add;
1170                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1171                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1172                                 break;
1173                         default:
1174                                 break;
1175                         }
1176                 }
1177
1178                 if (next->num_sge) {
1179                         next->sg_list = (void *) next +
1180                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1181                         if (copy_from_user(next->sg_list,
1182                                            buf + sizeof cmd +
1183                                            cmd.wr_count * cmd.wqe_size +
1184                                            sg_ind * sizeof (struct ib_sge),
1185                                            next->num_sge * sizeof (struct ib_sge))) {
1186                                 ret = -EFAULT;
1187                                 goto out;
1188                         }
1189                         sg_ind += next->num_sge;
1190                 } else
1191                         next->sg_list = NULL;
1192         }
1193
1194         resp.bad_wr = 0;
1195         ret = qp->device->post_send(qp, wr, &bad_wr);
1196         if (ret)
1197                 for (next = wr; next; next = next->next) {
1198                         ++resp.bad_wr;
1199                         if (next == bad_wr)
1200                                 break;
1201                 }
1202
1203         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1204                          &resp, sizeof resp))
1205                 ret = -EFAULT;
1206
1207 out:
1208         up(&ib_uverbs_idr_mutex);
1209
1210         while (wr) {
1211                 next = wr->next;
1212                 kfree(wr);
1213                 wr = next;
1214         }
1215
1216         kfree(user_wr);
1217
1218         return ret ? ret : in_len;
1219 }
1220
1221 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1222                                                     int in_len,
1223                                                     u32 wr_count,
1224                                                     u32 sge_count,
1225                                                     u32 wqe_size)
1226 {
1227         struct ib_uverbs_recv_wr *user_wr;
1228         struct ib_recv_wr        *wr = NULL, *last, *next;
1229         int                       sg_ind;
1230         int                       i;
1231         int                       ret;
1232
1233         if (in_len < wqe_size * wr_count +
1234             sge_count * sizeof (struct ib_uverbs_sge))
1235                 return ERR_PTR(-EINVAL);
1236
1237         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1238                 return ERR_PTR(-EINVAL);
1239
1240         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1241         if (!user_wr)
1242                 return ERR_PTR(-ENOMEM);
1243
1244         sg_ind = 0;
1245         last = NULL;
1246         for (i = 0; i < wr_count; ++i) {
1247                 if (copy_from_user(user_wr, buf + i * wqe_size,
1248                                    wqe_size)) {
1249                         ret = -EFAULT;
1250                         goto err;
1251                 }
1252
1253                 if (user_wr->num_sge + sg_ind > sge_count) {
1254                         ret = -EINVAL;
1255                         goto err;
1256                 }
1257
1258                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1259                                user_wr->num_sge * sizeof (struct ib_sge),
1260                                GFP_KERNEL);
1261                 if (!next) {
1262                         ret = -ENOMEM;
1263                         goto err;
1264                 }
1265
1266                 if (!last)
1267                         wr = next;
1268                 else
1269                         last->next = next;
1270                 last = next;
1271
1272                 next->next       = NULL;
1273                 next->wr_id      = user_wr->wr_id;
1274                 next->num_sge    = user_wr->num_sge;
1275
1276                 if (next->num_sge) {
1277                         next->sg_list = (void *) next +
1278                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1279                         if (copy_from_user(next->sg_list,
1280                                            buf + wr_count * wqe_size +
1281                                            sg_ind * sizeof (struct ib_sge),
1282                                            next->num_sge * sizeof (struct ib_sge))) {
1283                                 ret = -EFAULT;
1284                                 goto err;
1285                         }
1286                         sg_ind += next->num_sge;
1287                 } else
1288                         next->sg_list = NULL;
1289         }
1290
1291         kfree(user_wr);
1292         return wr;
1293
1294 err:
1295         kfree(user_wr);
1296
1297         while (wr) {
1298                 next = wr->next;
1299                 kfree(wr);
1300                 wr = next;
1301         }
1302
1303         return ERR_PTR(ret);
1304 }
1305
1306 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1307                             const char __user *buf, int in_len,
1308                             int out_len)
1309 {
1310         struct ib_uverbs_post_recv      cmd;
1311         struct ib_uverbs_post_recv_resp resp;
1312         struct ib_recv_wr              *wr, *next, *bad_wr;
1313         struct ib_qp                   *qp;
1314         ssize_t                         ret = -EINVAL;
1315
1316         if (copy_from_user(&cmd, buf, sizeof cmd))
1317                 return -EFAULT;
1318
1319         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1320                                        in_len - sizeof cmd, cmd.wr_count,
1321                                        cmd.sge_count, cmd.wqe_size);
1322         if (IS_ERR(wr))
1323                 return PTR_ERR(wr);
1324
1325         down(&ib_uverbs_idr_mutex);
1326
1327         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1328         if (!qp || qp->uobject->context != file->ucontext)
1329                 goto out;
1330
1331         resp.bad_wr = 0;
1332         ret = qp->device->post_recv(qp, wr, &bad_wr);
1333         if (ret)
1334                 for (next = wr; next; next = next->next) {
1335                         ++resp.bad_wr;
1336                         if (next == bad_wr)
1337                                 break;
1338                 }
1339
1340
1341         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1342                          &resp, sizeof resp))
1343                 ret = -EFAULT;
1344
1345 out:
1346         up(&ib_uverbs_idr_mutex);
1347
1348         while (wr) {
1349                 next = wr->next;
1350                 kfree(wr);
1351                 wr = next;
1352         }
1353
1354         return ret ? ret : in_len;
1355 }
1356
1357 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1358                             const char __user *buf, int in_len,
1359                             int out_len)
1360 {
1361         struct ib_uverbs_post_srq_recv      cmd;
1362         struct ib_uverbs_post_srq_recv_resp resp;
1363         struct ib_recv_wr                  *wr, *next, *bad_wr;
1364         struct ib_srq                      *srq;
1365         ssize_t                             ret = -EINVAL;
1366
1367         if (copy_from_user(&cmd, buf, sizeof cmd))
1368                 return -EFAULT;
1369
1370         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1371                                        in_len - sizeof cmd, cmd.wr_count,
1372                                        cmd.sge_count, cmd.wqe_size);
1373         if (IS_ERR(wr))
1374                 return PTR_ERR(wr);
1375
1376         down(&ib_uverbs_idr_mutex);
1377
1378         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1379         if (!srq || srq->uobject->context != file->ucontext)
1380                 goto out;
1381
1382         resp.bad_wr = 0;
1383         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1384         if (ret)
1385                 for (next = wr; next; next = next->next) {
1386                         ++resp.bad_wr;
1387                         if (next == bad_wr)
1388                                 break;
1389                 }
1390
1391
1392         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1393                          &resp, sizeof resp))
1394                 ret = -EFAULT;
1395
1396 out:
1397         up(&ib_uverbs_idr_mutex);
1398
1399         while (wr) {
1400                 next = wr->next;
1401                 kfree(wr);
1402                 wr = next;
1403         }
1404
1405         return ret ? ret : in_len;
1406 }
1407
1408 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1409                             const char __user *buf, int in_len,
1410                             int out_len)
1411 {
1412         struct ib_uverbs_create_ah       cmd;
1413         struct ib_uverbs_create_ah_resp  resp;
1414         struct ib_uobject               *uobj;
1415         struct ib_pd                    *pd;
1416         struct ib_ah                    *ah;
1417         struct ib_ah_attr               attr;
1418         int ret;
1419
1420         if (out_len < sizeof resp)
1421                 return -ENOSPC;
1422
1423         if (copy_from_user(&cmd, buf, sizeof cmd))
1424                 return -EFAULT;
1425
1426         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1427         if (!uobj)
1428                 return -ENOMEM;
1429
1430         down(&ib_uverbs_idr_mutex);
1431
1432         pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1433         if (!pd || pd->uobject->context != file->ucontext) {
1434                 ret = -EINVAL;
1435                 goto err_up;
1436         }
1437
1438         uobj->user_handle = cmd.user_handle;
1439         uobj->context     = file->ucontext;
1440
1441         attr.dlid              = cmd.attr.dlid;
1442         attr.sl                = cmd.attr.sl;
1443         attr.src_path_bits     = cmd.attr.src_path_bits;
1444         attr.static_rate       = cmd.attr.static_rate;
1445         attr.port_num          = cmd.attr.port_num;
1446         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1447         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1448         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1449         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1450         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1451
1452         ah = ib_create_ah(pd, &attr);
1453         if (IS_ERR(ah)) {
1454                 ret = PTR_ERR(ah);
1455                 goto err_up;
1456         }
1457
1458         ah->uobject = uobj;
1459
1460 retry:
1461         if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) {
1462                 ret = -ENOMEM;
1463                 goto err_destroy;
1464         }
1465
1466         ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id);
1467
1468         if (ret == -EAGAIN)
1469                 goto retry;
1470         if (ret)
1471                 goto err_destroy;
1472
1473         resp.ah_handle = uobj->id;
1474
1475         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1476                          &resp, sizeof resp)) {
1477                 ret = -EFAULT;
1478                 goto err_idr;
1479         }
1480
1481         down(&file->mutex);
1482         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1483         up(&file->mutex);
1484
1485         up(&ib_uverbs_idr_mutex);
1486
1487         return in_len;
1488
1489 err_idr:
1490         idr_remove(&ib_uverbs_ah_idr, uobj->id);
1491
1492 err_destroy:
1493         ib_destroy_ah(ah);
1494
1495 err_up:
1496         up(&ib_uverbs_idr_mutex);
1497
1498         kfree(uobj);
1499         return ret;
1500 }
1501
1502 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1503                              const char __user *buf, int in_len, int out_len)
1504 {
1505         struct ib_uverbs_destroy_ah cmd;
1506         struct ib_ah               *ah;
1507         struct ib_uobject          *uobj;
1508         int                         ret = -EINVAL;
1509
1510         if (copy_from_user(&cmd, buf, sizeof cmd))
1511                 return -EFAULT;
1512
1513         down(&ib_uverbs_idr_mutex);
1514
1515         ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle);
1516         if (!ah || ah->uobject->context != file->ucontext)
1517                 goto out;
1518
1519         uobj = ah->uobject;
1520
1521         ret = ib_destroy_ah(ah);
1522         if (ret)
1523                 goto out;
1524
1525         idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle);
1526
1527         down(&file->mutex);
1528         list_del(&uobj->list);
1529         up(&file->mutex);
1530
1531         kfree(uobj);
1532
1533 out:
1534         up(&ib_uverbs_idr_mutex);
1535
1536         return ret ? ret : in_len;
1537 }
1538
1539 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1540                                const char __user *buf, int in_len,
1541                                int out_len)
1542 {
1543         struct ib_uverbs_attach_mcast cmd;
1544         struct ib_qp                 *qp;
1545         int                           ret = -EINVAL;
1546
1547         if (copy_from_user(&cmd, buf, sizeof cmd))
1548                 return -EFAULT;
1549
1550         down(&ib_uverbs_idr_mutex);
1551
1552         qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1553         if (qp && qp->uobject->context == file->ucontext)
1554                 ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1555
1556         up(&ib_uverbs_idr_mutex);
1557
1558         return ret ? ret : in_len;
1559 }
1560
1561 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1562                                const char __user *buf, int in_len,
1563                                int out_len)
1564 {
1565         struct ib_uverbs_detach_mcast cmd;
1566         struct ib_qp                 *qp;
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                 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1577
1578         up(&ib_uverbs_idr_mutex);
1579
1580         return ret ? ret : in_len;
1581 }
1582
1583 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1584                              const char __user *buf, int in_len,
1585                              int out_len)
1586 {
1587         struct ib_uverbs_create_srq      cmd;
1588         struct ib_uverbs_create_srq_resp resp;
1589         struct ib_udata                  udata;
1590         struct ib_uevent_object         *uobj;
1591         struct ib_pd                    *pd;
1592         struct ib_srq                   *srq;
1593         struct ib_srq_init_attr          attr;
1594         int ret;
1595
1596         if (out_len < sizeof resp)
1597                 return -ENOSPC;
1598
1599         if (copy_from_user(&cmd, buf, sizeof cmd))
1600                 return -EFAULT;
1601
1602         INIT_UDATA(&udata, buf + sizeof cmd,
1603                    (unsigned long) cmd.response + sizeof resp,
1604                    in_len - sizeof cmd, out_len - sizeof resp);
1605
1606         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1607         if (!uobj)
1608                 return -ENOMEM;
1609
1610         down(&ib_uverbs_idr_mutex);
1611
1612         pd  = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1613
1614         if (!pd || pd->uobject->context != file->ucontext) {
1615                 ret = -EINVAL;
1616                 goto err_up;
1617         }
1618
1619         attr.event_handler  = ib_uverbs_srq_event_handler;
1620         attr.srq_context    = file;
1621         attr.attr.max_wr    = cmd.max_wr;
1622         attr.attr.max_sge   = cmd.max_sge;
1623         attr.attr.srq_limit = cmd.srq_limit;
1624
1625         uobj->uobject.user_handle = cmd.user_handle;
1626         uobj->uobject.context     = file->ucontext;
1627         uobj->events_reported     = 0;
1628         INIT_LIST_HEAD(&uobj->event_list);
1629
1630         srq = pd->device->create_srq(pd, &attr, &udata);
1631         if (IS_ERR(srq)) {
1632                 ret = PTR_ERR(srq);
1633                 goto err_up;
1634         }
1635
1636         srq->device        = pd->device;
1637         srq->pd            = pd;
1638         srq->uobject       = &uobj->uobject;
1639         srq->event_handler = attr.event_handler;
1640         srq->srq_context   = attr.srq_context;
1641         atomic_inc(&pd->usecnt);
1642         atomic_set(&srq->usecnt, 0);
1643
1644         memset(&resp, 0, sizeof resp);
1645
1646 retry:
1647         if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
1648                 ret = -ENOMEM;
1649                 goto err_destroy;
1650         }
1651
1652         ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id);
1653
1654         if (ret == -EAGAIN)
1655                 goto retry;
1656         if (ret)
1657                 goto err_destroy;
1658
1659         resp.srq_handle = uobj->uobject.id;
1660
1661         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1662                          &resp, sizeof resp)) {
1663                 ret = -EFAULT;
1664                 goto err_idr;
1665         }
1666
1667         down(&file->mutex);
1668         list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list);
1669         up(&file->mutex);
1670
1671         up(&ib_uverbs_idr_mutex);
1672
1673         return in_len;
1674
1675 err_idr:
1676         idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id);
1677
1678 err_destroy:
1679         ib_destroy_srq(srq);
1680
1681 err_up:
1682         up(&ib_uverbs_idr_mutex);
1683
1684         kfree(uobj);
1685         return ret;
1686 }
1687
1688 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
1689                              const char __user *buf, int in_len,
1690                              int out_len)
1691 {
1692         struct ib_uverbs_modify_srq cmd;
1693         struct ib_srq              *srq;
1694         struct ib_srq_attr          attr;
1695         int                         ret;
1696
1697         if (copy_from_user(&cmd, buf, sizeof cmd))
1698                 return -EFAULT;
1699
1700         down(&ib_uverbs_idr_mutex);
1701
1702         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1703         if (!srq || srq->uobject->context != file->ucontext) {
1704                 ret = -EINVAL;
1705                 goto out;
1706         }
1707
1708         attr.max_wr    = cmd.max_wr;
1709         attr.srq_limit = cmd.srq_limit;
1710
1711         ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
1712
1713 out:
1714         up(&ib_uverbs_idr_mutex);
1715
1716         return ret ? ret : in_len;
1717 }
1718
1719 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
1720                               const char __user *buf, int in_len,
1721                               int out_len)
1722 {
1723         struct ib_uverbs_destroy_srq      cmd;
1724         struct ib_uverbs_destroy_srq_resp resp;
1725         struct ib_srq                    *srq;
1726         struct ib_uevent_object          *uobj;
1727         int                               ret = -EINVAL;
1728
1729         if (copy_from_user(&cmd, buf, sizeof cmd))
1730                 return -EFAULT;
1731
1732         down(&ib_uverbs_idr_mutex);
1733
1734         memset(&resp, 0, sizeof resp);
1735
1736         srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1737         if (!srq || srq->uobject->context != file->ucontext)
1738                 goto out;
1739
1740         uobj = container_of(srq->uobject, struct ib_uevent_object, uobject);
1741
1742         ret = ib_destroy_srq(srq);
1743         if (ret)
1744                 goto out;
1745
1746         idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
1747
1748         down(&file->mutex);
1749         list_del(&uobj->uobject.list);
1750         up(&file->mutex);
1751
1752         ib_uverbs_release_uevent(file, uobj);
1753
1754         resp.events_reported = uobj->events_reported;
1755
1756         kfree(uobj);
1757
1758         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1759                          &resp, sizeof resp))
1760                 ret = -EFAULT;
1761
1762 out:
1763         up(&ib_uverbs_idr_mutex);
1764
1765         return ret ? ret : in_len;
1766 }